DE112019006502T5 - Solder paste recovery device and screen printing device - Google Patents

Abstract

A solder paste recovery device comprises a stop portion that abuts a first screen mask or a second screen mask, a sheet that is transported over the stop portion in a first direction for recovery of a solder paste or in a second direction for supplying the solder paste, and a conveying portion that the Sheet is fed in the first direction or the second direction. An opposing face opposing the first screen mask and the second screen mask at a first angle α is provided at a tip end of the stopper portion. The stop section is inclined with respect to the first screen mask and the second screen mask at a second angle β which is greater than the first angle.

Description

TECHNICAL AREA

The present disclosure relates to a solder paste recovery device and a screen printing device.

BACKGROUND

Patent Literature 1 discloses a screen printing device including a recovery device that recovers a solder paste remaining on a screen mask when the screen mask is replaced. In the screen printing device, the solder paste remaining on the screen mask is scraped off and recovered onto a vinyl sheet provided in the recovery device by pushing a squeegee toward one side of the recovery device.

ZITI LISTED

PATENT LITERATURE

Patent Literature 1: JP-A-H6-262750

SUMMARY OF THE INVENTION

TECHNICAL PROBLEM

Even if the configuration of Patent Literature 1 is used, when the solder paste is recovered or supplied from or to the screen mask, a part of the solder paste may remain on the vinyl sheet, and the solder paste remaining on the vinyl sheet may stick to an accidental place on the screen mask. Therefore, it is important to prevent the screen mask from being contaminated in order to avoid a misprint. In the configuration of Patent Literature 1, however, a base plate of the recovery device is provided substantially horizontally with respect to the screen mask. Therefore, when the vinyl sheet is transported in a recovery direction or in a feeding direction, there is a risk that the residual paste adhering to the vinyl sheet will come into contact with the screen mask and contaminate the screen mask.

The present disclosure has been made in view of the above-described conventional circumstances, and an object thereof is to provide a solder paste recovery device and a screen printing device that prevent the occurrence of a printing failure due to the adhesion of a solder paste.

THE SOLUTION OF THE PROBLEM

The present disclosure provides a solder paste recovery device that is configured to recover a solder paste on a first screen mask and supply the recovered solder paste to a second screen mask different from the first screen mask, the solder paste recovery device comprising: a stopper portion that is different from the first screen mask it is configured that it rests against the first screen mask or the second screen mask; a sheet conveyed over the stopper portion in a first direction for recovering the solder paste or in a second direction for feeding the solder paste; and a conveying section configured to convey the sheet in one of the first direction and the second direction, wherein an opposing surface opposing the first screen mask and the second screen mask at a first angle is provided at a tip end of the stopper section, and wherein the stop portion is inclined with respect to the first screen mask and the second screen mask at a second angle that is greater than the first angle.

The present disclosure provides a screen printing device configured to print a solder paste onto a circuit board via a first screen mask or a second screen mask different from the first screen mask, the screen printing device comprising a solder paste recovery device configured so is that it recovers the solder paste on the first screen mask and supplies the recovered solder paste to the second screen mask, the solder paste recovery device comprising a stop portion configured to abut against the first screen mask or the second screen mask with a sheet over the stop portion is conveyed in a first direction for recovering the solder paste or in a second direction for supplying the solder paste, and a conveying section configured to convey the sheet in the first direction or the second direction, wherein a g e opposite surface, which faces the first screen mask and the second screen mask at a first angle, is provided at a tip end of the stopper portion, and wherein the stopper portion is inclined at a second angle greater than the first angle with respect to the first screen mask and the second screen mask is.

ADVANTAGEOUS EFFECTS OF THE INVENTION

According to the present disclosure, it is possible to prevent the occurrence of a printing error due to the adhesion of a solder paste.

Figure list

• 1 Fig. 3 is a perspective view of a screen printing device according to an embodiment of the present disclosure.
• 2 Fig. 13 is a side view of the screen printing device according to the embodiment of the present disclosure.
• 3 Fig. 13 is a partial perspective view of the screen printing device according to the embodiment of the present disclosure.
• 4th Fig. 13 is a partial plan view of the screen printing device according to the embodiment of the present disclosure.
• 5 Fig. 13 is a side view of a solder paste recovery device provided in the screen printing device according to the embodiment of the present disclosure.
• 6th Fig. 13 is a perspective view of an auto mask placement unit provided in the screen printing device according to the embodiment of the present disclosure.
• 7 (a) , 7 (b) and 7 (c) FIG. 13 is explanatory diagrams of a solder recovery process performed by the screen printing apparatus according to FIG Embodiment of the present disclosure is performed.
• 8 (a) and 8 (b) 12 are explanatory diagrams of a solder supply process performed by the screen printing device according to the embodiment of the present disclosure.
• 9 (a) and 9 (b) 13 are explanatory diagrams during solder recovery of a stopper portion provided in the screen printing device according to the embodiment of the present disclosure.
• 10 (a) and 10 (b) 12 are explanatory diagrams during solder supply of the stopper portion provided in the screen printing device according to the embodiment of the present disclosure.
• 11 (a) and 11 (b) 12 are explanatory diagrams during the recovery and supply of solder paste performed in the screen printing device according to the embodiment of the present disclosure.
• 12th Fig. 13 is an explanatory diagram of a mask supporting operation by clamping performed by the screen printing device according to the embodiment of the present disclosure.
• 13 (a) and 13 (b) 12 are explanatory diagrams of a solder stripping operation performed by the screen printing device according to the embodiment of the present disclosure.
• 14th Fig. 13 is a side view of a crimping head of a comparative example in which the paste solder recovery device is not provided.
• 15th Fig. 13 is a side view of the squeegee head provided in the screen printing device according to the embodiment of the present disclosure.
• 16 Fig. 13 is an exploded perspective view of the auto mask placement unit provided in the screen printing device according to the embodiment of the present disclosure.
• 17 (a) , 17 (b) and 17 (c) 14 are side views showing an attachment and detachment process of the solder paste recovery device included in the screen printing device according to the embodiment of the present disclosure.
• 18th Fig. 13 is a perspective view of the solder paste recovery device provided in the screen printing device according to the embodiment of the present disclosure.
• 19th Fig. 13 is a perspective view of a power cord holding the solder paste recovery device provided in the screen printing device according to the embodiment of the present disclosure.
• 20 (a) and 20 (b) are explanatory diagrams of a sheet feeding operation of the screen printing device according to the embodiment of the present disclosure.
• 21 Fig. 13 is an explanatory diagram during a recovery process using a new sheet surface of the screen printing device according to the embodiment of the present disclosure.
• 22nd Fig. 13 is an explanatory diagram during a feeding process using the new sheet area of the screen printing apparatus according to the embodiment of the present disclosure.
• 23 Fig. 13 is a block diagram showing a control system of the screen printing device according to the embodiment of the present disclosure.
• 24 FIG. 13 is an explanatory diagram of a solder paste recovery process performed by the screen printing device according to the embodiment of the present disclosure.
• 25th Fig. 13 is an explanatory diagram of the solder paste recovery process performed by the screen printing device according to the embodiment of the present disclosure.
• 26th Fig. 13 is an explanatory diagram of the solder paste recovery process performed by the screen printing device according to the embodiment of the present disclosure.
• 27 Fig. 13 is an explanatory diagram of the solder paste recovery process performed by the screen printing device according to the embodiment of the present disclosure.
• 28 Fig. 13 is an explanatory diagram of a solder paste feeding operation performed by the screen printing device according to the embodiment of the present disclosure.
• 29 Fig. 13 is an explanatory diagram of the solder paste feeding operation performed by the screen printing device according to the embodiment of the present disclosure.
• 30th Fig. 13 is an explanatory diagram of the solder paste feeding operation performed by the screen printing device according to the embodiment of the present disclosure.
• 31 Fig. 13 is an explanatory diagram of the solder paste feeding operation performed by the screen printing device according to the embodiment of the present disclosure.
• 32 Fig. 13 is a flowchart of the sheet feeding process performed by the screen printing device according to the embodiment of the present disclosure.

Description of the embodiments

Hereinafter, an embodiment in which configurations and functions of a paste solder device and a screen printing device according to the present disclosure are specifically disclosed will be described with reference to the drawings as appropriate. An unnecessarily detailed description can, however, be dispensed with. For example, the detailed description of a known matter or the repeated description of an essentially identical configuration can be omitted. This serves to avoid unnecessary redundancy in the following description and to facilitate understanding for the person skilled in the art. It should be noted that the accompanying drawings and the following description are provided for a thorough understanding of the present disclosure by those skilled in the art, and are not intended to limit the subject matter recited in the claims.

1 Fig. 3 is a perspective view of a screen printing device 1 according to an embodiment of the present disclosure. 2 Fig. 3 is a side view of the screen printing device 1 according to the embodiment of the present disclosure. 3 Fig. 3 is a partial perspective view of the screen printing device 1 according to the embodiment of the present disclosure. 4th Fig. 3 is a partial plan view of the screen printing device 1 according to the embodiment of the present disclosure.

The screen printing device 1 repeatedly performs a screen printing process using a plate 2 (for example, a circuit board) loaded from an upstream crotch side receives a paste Pst (for example, a solder paste) on electrodes 2d of the plate 2 applies by screen printing and the paste Pst to an apparatus (e.g., a component mounter (not shown)) on a downstream crotch side. In the following embodiment, for the convenience of description, a left-right direction is set as an X-axis direction from an operator, a left side is set as the upstream step side, and a right side is set as the downstream step side. Furthermore, a front-rear direction in which an operator OP is set as the front and a direction away from the operator OP is set as the rear is set as the Y-axis direction, and an up-and-down direction is set as the Z-axis. Direction set.

In the 1 and 2 includes the screen printing device 1 a disk holding and moving mechanism 12 on a base 11, and a screen mask 13th is provided above the disk holding and moving mechanism 12.

As in the 3 and 4th As shown, on a left side of the plate holding and moving mechanism 12, an infeed conveyor 14 is provided which is directed from an upstream step side of the screen printing device 1 inserted plate 2 records and the record 2 transported to the disk holding and moving mechanism 12. Furthermore, on a right side of the plate holding and moving mechanism 12, there is provided an output conveyor 15 that carries the plate 2 from the disk holding and moving mechanism 12 and receives the disk 2 to the downstream Promoted step side. A camera 16 is movable in a lower area of the screen mask 13th provided, and a squeezing head 17th is movable in an upper area of the screen mask 13th intended.

In 2 and 3 the disk holding and moving mechanism 12 includes a disk holding portion 21 and a movable table portion 22nd (an example of a table). The plate holding section 21 includes a positioning conveyor 31 (see FIG 4th ), a lower receiving portion 32, and a pair of front and rear clamps 33 (please refer 4th ). The positioning conveyor 31 positions the plate received from the infeed conveyor 14 2 in a predetermined clamping position. The lower receiving portion 32 supports the plate positioned by the positioning conveyor 31 in the clamping position 2 from below, and the jaws 33 clamp and hold the plate 2 from one side (Y-axis direction). Of the two clamps provided in the plate holding section 21 33 one located on one side of the operator OP is referred to as a front clamp 33F, and one located on a side opposite to the operator OP is referred to as a rear clamp 33R. The moving table section 22nd comprises an XYθ table mechanism in which a plurality of table mechanisms are stacked in multiple stages, and moves the disk holding section 21 in a horizontal direction in the plane and in the up-down direction.

In the 1 and 2 becomes the screen mask 13th formed by a metal member having a rectangular flat plate shape extending in an XY plane. In 4th is a rectangular area in the middle of the screen mask 13th a plate contact area R in which a lower surface is in contact with the plate 2 is. In the circuit board contact area R, a pattern opening 13h is provided, which is an arrangement of the electrodes 2d of the board 2 is equivalent to. An outer circumference of the screen mask 13th is supported by a frame member 13W.

In 2 the camera 16 includes an upper image capturing unit 16a having an image capturing field of view directed upward, and a lower image capturing unit 16b having an image capturing field of view directed downward. The camera 16 is driven by a camera moving mechanism 16K (see FIG 1 ) that uses a ball screw mechanism as an actuator to move in an XY plane.

In 1 and 2 includes the crimping head 17th a moving base 41, two squeezers 42 and two squeegee raising and lowering cylinders 43. The moving base 41 is a member which extends in the X-axis direction and is driven by a squeegee head moving mechanism 17K which has a ball screw mechanism as an actuator for moving in the Y-axis direction used. The two squeezers 42 are arranged to face each other side by side in front of and behind the moving base 41, and the two squeezers 42 reciprocate integrally by moving the moving base 41 in the Y-axis direction. From the two front and rear crushers 42 becomes one that is on a front side (a right side on the paper of 2 ) is located, referred to as front squeegee 42F, and one that is on a back side (a left side on the paper of 2 ) is referred to as the rear squeegee 42R. The two squeezers 42 are each formed from "spatula-shaped" elements that extend in the direction of the X-axis and run downwards at an angle. A rear side surface of the front squeegee 42F is a paste wiping surface, and a front side surface of the rear squeegee 42R is a paste wiping surface.

The two squeegee lifting and lowering cylinders 43 correspond to the two squeegees 42 arranged side by side on the moving base 41 in the front-rear direction. The two squeegee lifting and lowering cylinders 43 raise and lower the two squeegees 42 independent of the movement base 41. Each squeegee lifting and lowering cylinder 43 can have a corresponding squeegee 42 between a standby altitude position (see the in 2 shown squeezer 42 ), in which a lower end of the crusher 42 from a top of the screen mask 13th by a predetermined distance, and a stop height position in which the lower end of the screen mask 13th rests, raise and lower.

5 Fig. 3 is a side view of a solder paste recovery device 71 that are in the screen printing device 1 is provided in accordance with the embodiment of the present disclosure. The screen printing device 1 includes the solder paste recovery device 71 . The solder paste recovery device 71 wins the paste Pst on the first screen mask 13F (please refer 24 ) and returns the recovered paste Pst on the second screen mask 13R (please refer 24 ) from the first screen mask 13F is different, off again.

The solder paste recovery device 71 includes a stop portion 73 , the one on the first screen mask 13F or the second screen mask 13R is applied, a sheet ("sheet") 75, which over the stop section 73 in a first direction a for recovery of the paste Pst or in a second direction b for feeding the paste Pst is transported, and a conveyance section 77 who made the sheet 75 transported in the first direction a or the second direction b.

The stage of promotion 77 includes an upstream roller 79 around which the sheet 75 is wound, and a winding-side roller 81 that the sheet 75 unwinds from the supply side roll 79. The supply side roller 79 is rotated by a supply side roller motor 83 in the forward and reverse directions. The winding-side roller 81 is rotated in the forward and reverse directions by a winding-side roller motor 85. The inlet-side roller motor 83 and the winding-side roller motor 85 are controlled by a control device 60 (see FIG 23 ) controlled so that they rotate synchronously with each other. In addition, the promotion section 77 provided with a plurality of guide rollers 87 around which the sheet 75 is wrapped around one turn of the sheet 75 respectively.

The stop section 73 is formed from a strip-shaped thin plate extending along a longitudinal direction of the crusher 42 extends. One side of the long section of the stop section 73 is on a housing 89 of the solder paste recovery device 71 attached, and the other side of the long section of the stop section 73 is attached so that it slopes downwards. The foil 75 is around a downwardly protruding end of the stopper portion 73 is wound and forms a path of rotation along a front and a rear side of the stopper portion 73 . Thus, when the supply-side roller motor 83 and the winding-side roller motor 85 are rotated in synchronism with each other, the film becomes 75 from a lower surface to an upper surface (see first direction a) or from the upper surface to the lower surface (see second direction b) while holding the tip end of the stopper portion 73 happened.

In the present embodiment, for the film 75 for example a PTFE film is used, which has a low friction with the paste Pst having. As the PTFE film, for example, as a film 75 is used, it is possible to reduce the peelability of the paste Pst from the slide 75 to improve when the paste Pst is fed. Furthermore, it is due to the use of the PTFE film as a film 75 possible to increase chemical resistance to a detergent or the like used in cleaning the device. The material of the foil 75 is not limited to the PTFE film as long as the film 75 low friction with the paste described above Pst and has chemical resistance.

6th Figure 3 is a perspective view of an auto mask placement unit 91 that are in the screen printing device 1 is provided in accordance with the embodiment of the present disclosure. The auto mask placement unit 91 (an example of a positioning device) is on the squeegee head 17th appropriate. The auto mask placement unit 91 comprises a solder recovery unit 93. The solder paste recovery device 71 is detachably attached to the recovery unit 93. The solder reclaim mounting unit 93 includes a long frame 95 along the squeezer 42 , a pair of cylinders 99 that are at both ends of the frame 95 are attached and rods 97 for positioning the mask, as well as a recovery unit raising and lowering cylinder 101 that is in the middle of the frame 95 is attached. The solder paste recovery device 71 can be raised and lowered by being attached to a recovery unit support rod 105 attached to a lifting and lowering rod 103 of the recovery unit raising and lowering cylinder 101 is attached. A mounting structure of the solder paste recovery device 71 will be described later.

7 (a) , 7 (b) and 7 (c) are explanatory diagrams of a recovery process of solder discharged from the screen printing device 1 is performed in accordance with the embodiment of the present disclosure. In the screen printing device 1 becomes the sheet during the recovery process 75 in the first direction a to recover the paste Pst conveyed, and at the same time the stop section 73 moves in a direction n in which the stop portion 73 the paste Pst approaching. The movement takes place, for example, by controlling the movement mechanism of the squeezing head 17K by the control device 60.

8 (a) and 8 (b) are explanatory diagrams of a solder supply operation performed by the screen printing device 1 is performed in accordance with the embodiment of the present disclosure. In the screen printing device 1 the sheet is being fed 75 in the second direction b for feeding the paste Pst transported, and at the same time the stopper portion 73 in a direction s away from the paste Pst emotional. The movement takes place, for example, by controlling the movement mechanism 17K of the squeezing head by the control device 60. 9 (a) and 9 (b) are explanatory diagrams during solder recovery of the stopper portion 73 that in the screen printing device 1 is provided in accordance with the embodiment of the present disclosure. As in 9 (a) and 9 (b) shown is at the pointed end of the stop portion 73 one of the first screen masks 13F and the second screen mask 13R opposite face 107 provided at a first angle α. The stop section 73 is in relation to the first screen mask 13F and the second screen mask 13R inclined at a second angle β which is greater than the first angle α.

In the present embodiment, the first angle α is 0 degrees, for example. Hence the opposite face 107 the first screen mask 13F and the second screen mask 13R facing parallel.

When in the screen printing device 1 the leaf 75 against the opposite surface 107 is pressed, the sheet is 75 in contact with the first screen mask 13F and the second screen mask 13R in an area that is at least equal to or greater than that of the opposite surface 107 .

As in 9 (a) shown is a ground contact area between the screen mask 13th and the sheet 75 small if a shape of the tip end of the stopper portion 73 for example is a right angle. Although the paste Pst Can be recovered during the recovery process, solder particles 109 of the paste Pst on the screen mask 13th lag behind.

In contrast, as in 9 (b) shown the adhesion between the screen mask 13th and the slide 75 improved when the shape of the pointed end of the stopper portion 73 is a shape in which, for example, the opposite surface 107 parallel to the screen mask 13th is brought into contact, as there is a large ground contact area between the screen mask 13th and the slide 75 can be ensured. Accordingly, the paste recovery device 71 adhesion of the solder particles 109 to the screen mask 13th prevent during the recovery process.

10 (a) and 10 (b) are explanatory diagrams during solder supply of the stopper portion 73 that in the screen printing device 1 is provided in accordance with the embodiment of the present disclosure.

As in 10 (a) shown is the ground contact area between the screen mask 13th and the sheet 75 small if the shape of the end of the stopper portion 73 for example, a right angle, and the solder particles 109 of the paste Pst on the sheet during the feeding process 75 remain. When the solder particles 109 on the sheet 75 remain, the soldering particles 109 can be fed to another screen mask, and there is a risk that a printing error will occur.

In contrast, as in 10 (b) shown the adhesion between the screen mask 13th and the sheet 75 improved when the shape of the pointed end of the stopper portion 73 is a shape in which, for example, the opposite face 107 parallel to the screen mask 13th is brought into contact, as there is a large ground contact area between the screen mask 13th and the sheet 75 can be ensured. Accordingly, the paste recovery device 71 adhesion of the solder particles 109 to the foil 75 Prevent during the restoration process.

11 (a) and 11 (b) are explanatory diagrams during the extraction and supply of paste Pst that came from the screen printing device 1 is performed in accordance with the embodiment of the present disclosure. 11 (b) FIG. 13 shows a cross section along line AA of FIG 11 (a) . In the solder paste recovery device 71 becomes the stop section 73 during the recovery process and the supply process with a predetermined compressive force F against the screen mask 13th pressed. If the screen mask 13th is bent at this point, arises between the screen mask 13th and the slide 75 an in 11 (b) illustrated gap G. When the gap G is created, the paste Pst on the screen mask 13th remain because the adhesiveness between the screen mask 13th and the sheet 75 is reduced, and a typographical error may occur.

12th Fig. 13 is an explanatory diagram of a mask supporting operation by the clamps 33 coming from the screen printing device 1 is performed in accordance with the embodiment of the present disclosure. The screen printing device 1 includes the pair of clamps 33 (see description above), which the plate positioned at a predetermined printing position 2 grab from both sides. The screen printing device further comprises 1 the movable table section 22nd (see description above), which is a table on which the clamps 33 are arranged and on which the terminals 33 can be moved in the up-down direction. When in the screen printing device 1 the solder paste recovery device 71 the paste Pst recovers or feeds, actuates the movable table section 22nd the clamps 33 such that the terminals 33 on the lower surface of the first screen mask 13F or the second screen mask 13R issue. The process is carried out, for example, by the control device 60 which performs an operation of the movable table section 22nd controls.

The screen printing device 1 prevents the shield mask from bending 13th by removing the clamps 33 lifts and the screen mask 13th supports on a lower surface side during the recovery process and the supply process. Accordingly, the screen printing device 1 the adhesion between the screen mask 13th and the sheet 75 improve, prevent the occurrence of the above-described gap G, and reduce the occurrence of printing errors.

13 (a) and 13 (b) are explanatory diagrams of a solder stripping operation performed by the screen printing apparatus 1 according to the Embodiment of the present disclosure is performed. The screen printing device 1 further comprises a wiper 111 to scrape off the on the sheet 75 remaining paste Pst . The screen printing device 1 can be made after the paste feeding process Pst on the paper 75 remaining paste Pst Scrape it off by using a mechanism, such as a spatula, on the solder paste recovery device 71 attaches. The scraper 111 includes a scraper slide mechanism that acts on the sheet 75 moved to and from him. In the scraper sliding mechanism, the timing of a sliding operation and a stroke ST in a sliding direction are controlled by the control device 60, for example.

In addition to including the scraper 111 can the screen printing device 1 by using a different configuration prevent the paste Pst on the paper 75 remains. For example, by using the sheet 75 as a single-use type, the paste can be reliably prevented Pst remains behind. Furthermore, the sheet 75 the remaining of the paste Pst by adjusting the material such as oil paper and the surface roughness. Furthermore, the sheet 75 the remaining of the paste Pst by setting a usage condition such as the shape of the tip end of the stopper portion 73 or a pressing force in relation to the screen mask 13th , impede.

14th Figure 3 is a side view of the nip head 17th of a comparative example in which the paste recovery device 71 is not provided. The crush head 17th slides over the screen mask 13th and moves the squeegee 42 to print the paste Pst on the plate 2 in the up-down direction. The auto mask placement unit 91 for positioning the screen mask 13th using a moving mechanism to move the squeeze head 17th via the screen mask 13th is on the squeeze head 17th appropriate. The screen mask 13th is framed by the square frame member 13W. The auto mask placement unit 91 moves and positions the screen mask 13th using the frame member 13W of the screen mask 13th .

At this point, the pinch head will be the 17th assembled automatic mask placement unit 91 moved further back than the frame part 13W. The movement position of the crush head 17th is a rear end moving position. Hence the screen printing device 1 usually provided with a frame 113 or the like of a device by being in the vicinity of the crimping head 17th (for example, at a distance of about 8 mm) is at a distance (a clearance d) at which the frame 113 or the like of the device has the crimping head moved to the rearmost end 17th does not interfere, so that compactness is achieved.

15th Figure 3 is a side view of the nip head 17th that in the screen printing device 1 is provided in accordance with the embodiment of the present disclosure. When in the screen printing device 1 the solder paste recovery device 71 is newly added, it is desirable to use the solder paste recovery device 71 on the squeeze head 17th to mount, which is above the screen mask 13th moved as the solder paste recovery device 71 can also serve as a movement mechanism. In the squeeze head 17th however, is between the auto mask placement unit 91 and the already assembled frame 113 only the small distance d (see 14th ) present, and if the solder paste recovery device 71 is newly assembled, it is necessary to lengthen a front-rear direction (a depth direction) of the device.

Therefore, in the screen printing device 1 the solder paste recovery device 71 between the crush head 17th and the auto mask placement unit 91 provided next to the crimping head 17th is provided and the one positioning device for positioning the screen mask 13th is. In this configuration, the solder paste recovery device is 71 between the crush head 17th and the auto mask placement unit 91 built in so that the solder paste recovery device 71 can be mounted without changing a depth of the device.

16 Figure 3 is an exploded perspective view of the auto mask placement unit 91 that are in the screen printing device 1 is provided in accordance with the embodiment of the present disclosure. The solder paste recovery device 71 includes a first essay. The auto mask placement unit 91 includes a second essay that corresponds to the first essay. The solder paste recovery device 71 is detachable on the solder paste recovery unit 93 of the mask automatic placement unit 91 attached using the first attachment and the second attachment.

In the present embodiment, the first fixture includes those in the solder paste recovery device 71 a pair of drilling elements is provided 115 provided in the housing 89. The second attachment also includes a pair of convex portions 117 that are on either side of the recovery unit support rod 105 are provided in a longitudinal direction.

17 (a) , 17 (b) and 17 (c) are side views showing an attaching and detaching process of the solder paste recovery device 71 show that in the screen printing device 1 is provided in accordance with the embodiment of the present disclosure. The recovery unit support pole 105 includes disc spring elements 119 that releasably lock and in resilient contact with the drilling elements 115 stand on the convex sections 117 are appropriate. The disc spring element 119 is held by a threaded bolt 121 whose base end penetrates in a plate thickness direction. The threaded bolt 121 penetrates a compressed helical spring 123. The plate spring element is corresponding 119 held pivotable in the up-down direction. Furthermore, the plate spring element is at a head end 119 a tapered surface 125 is formed. The tapered surface 125 serves the purpose of the plate spring element 119 against a pretensioning direction by inserting the drilling element 115 into the convex section 117 to repel. Accordingly, the paste recovery device 71 when assembling the solder paste recovery device 71 by simply pushing in the drilling elements 115 into the convex sections 117 ready to be assembled.

18th Fig. 3 is a perspective view of the solder paste recovery device 71 that are in the screen printing device 1 is provided in accordance with the embodiment of the present disclosure. The crush head 17th includes a connector (not shown) connecting the solder paste recovery device 71 can provide power. On the other hand, includes the solder paste recovery device 71 a power cord 127 that can be connected to and removed from the connector. At one end of the power cord 127 a mating connector 129 is attached, which is connected to the above-described connector of the squeezing head 17th can be connected. The housing 89 also includes the solder paste recovery device 71 a locking portion 131 holding the power cord 127 can lock.

19th Fig. 13 is a perspective view of a power cord holding state of the solder paste recovery device 71 that are in the screen printing device 1 is provided in accordance with the embodiment of the present disclosure. The locking section 131 locks the power cord 127 by holding a housing of the mating connector 129. The mating connector 129 of one cable end is with the locking portion 131 locked that in the solder paste recovery device 71 is provided so that the power cord 127 is held securely without coming into contact with other elements.

20 (a) and 20 (b) are explanatory diagrams of a sheet feeding operation of the screen printing device 1 according to the embodiment of the present disclosure. Incidentally, it sticks in the solder paste recovery device 71 , as in 20 (a) shown the paste Pst that remains immobile, lightly attached to a surface of the leaf 75 as transfer residual paste 133. If a type of paste to be used for production Pst after changing a model on which the paste Pst is printed (also known as produced), is changed, there is concern that different types of pastes will be different Pst mix and cause poor print quality.

Therefore, the screen printing device turns 1 adopts a screen printing method different from a conventional method in that it uses the solder paste recovery device 71 attaches. For example, the screen printing device includes 1 a sorting unit 135 (please refer 23 ) to sort the first paste Pst and the second paste Pst . The screen printing device further comprises 1 a recovery unit 70 (see 23 ) as an example of a control device. The solder recovery and supply control unit 70 controls conveyance (e.g., a conveyance amount) of the sheet 75 going through the section of carriage 77 is performed based on a result of the sorting unit 135 .

That is, the screen printing device 1 adopts a screen printing method that has a sorting step of sorting the first paste Pst and the second paste Pst through the sorting unit 135 and a conveyance determining step of controlling conveyance of the sheet 75 going through the section of carriage 77 is carried out by the recovery and supply control unit 70 based on the result of the sorting.

Especially when the types of the first paste Pst and the second paste Pst as a result of the sorting unit 135 are the same, the recovery and supply control unit 70 controls the driving of the supply-side roller motor 83 and the winding-side roller motor 85 of the conveyance section 77 to the sheet 75 not to be promoted.

On the other hand, if the types of the first paste Pst and the second paste Pst as a result of the sorting unit 135 are different, the recovery and supply control unit 70 controls the driving of the supply-side roller motor 83 and the winding-side roller motor 85 of the conveyance section 77 to the sheet 75 to transport. As a result, there is a recovery and supply operation of the sheet 75 performed on a new surface 137 which is in 20 (b) and which is newly fed from the supply-side roll 79.

21 Fig. 13 is an explanatory diagram during a recovery process in which a new sheet area of the screen printing device 1 is used according to the embodiment of the present disclosure. During the recovery process, the sheet 75 the residual transfer paste 133 located downstream of the new surface 137. This is in the screen printing device 1 the residual transfer paste 133 of the first paste Pst not with the second paste during the recovery process after the model change Pst mixed.

22nd Fig. 13 is an explanatory diagram during a feeding operation in which the new sheet area of the screen printing device 1 is used according to the embodiment of the present disclosure. Likewise, the sheet points 75 During the feeding process, the residual transfer paste 133 located downstream of the new surface 137 is applied. This is in the screen printing device 1 the residual transfer paste 133 of the first paste Pst not with the second paste during the feeding process after the model change Pst mixed.

The screen printing device 1 includes a timer 139 , which measures an elapsed time since switching a previous model (see 23 ). When the timer 139 When the measured elapsed time exceeds a predetermined time, the solder recovery and supply control unit 70 controls the driving of the supply-side roller motor 83 and the winding-side roller motor 85 of the conveyance section 77 to the sheet 75 to transport.

23 Fig. 13 is a block diagram showing a control system of the screen printing apparatus 1 according to the embodiment of the present disclosure. In the screen printing device 1 become the controls of a transport operation of the plate 2 by the infeed conveyor 14, a holding and moving mechanism of the plate 2 by the disk holding and moving mechanism 12 and a transporting operation of the disk 2 through the output conveyor 15 from that in the screen printing device 1 provided control device 60 (see 23 ) executed. Furthermore, control of a moving operation of the camera 16 and an image taking operation of the camera 16 by the camera moving mechanism 16K become a moving operation of the squeeze head 17th by the squeegee head moving mechanism 17K and lifting and lowering operations of the squeegees 42 by the squeegee lifting and lowering cylinder 43 also carried out by the control device 60. The image data captured by the image recording of the camera 16 are sent to the control device 60, and the image recognition is carried out by an image processing unit 60a (see FIG 23 ) the control device 60 performed.

In the screen printing device 1 According to the present embodiment, the required inputs are made by an input device 61 connected to the control device 60. Accordingly, the attachment points of the front and rear crusher 42 can be set optionally. Furthermore, the necessary input is made via the input device 61, so that a sliding speed of the squeezer 42 above the screen mask 13th and a pressure of squeezers 42 on the screen mask 13th can be set optionally.

When the model is switched, the sorting unit receives 135 a sort signal from the controller 60 and sorts information of the first paste Pst with information of the second paste Pst . The information of the first paste Pst and the information of the second paste Pst can be extracted from model-specific production data stored in a memory (not shown) in connection with the screen mask 13th are stored, for example by the camera 16 on the screen mask 13th affixed barcode reads. Furthermore, the information of the first paste Pst and the information of the second paste Pst can be entered directly via the input device 61. The sorting unit 135 compares whether the types of the first paste Pst and the second paste Pst are equal, and sends a result thereof to the paste recovery and supply control unit 70.

The timer receives when the model is switched 139 a timing signal from the controller 60 and measures an elapsed time after the model switching. The time elapsed since the model switchover can be obtained at any time by a time measurement signal from the control device 60. If the model is switched again, the timer ends 139 the timing, sets the elapsed time to an initial value of zero, and starts timing an elapsed time again in a new model.

Next, there is a recovery and supply operation of the paste Pst by the screen printing device described above 1 described.

As in the 1 until 4th shown takes when the plate 2 is loaded from the upstream side of the step, the infeed conveyor 14 loads the plate 2 and delivers the plate 2 to the plate holding section 21. The plate holding section 21 positions the items received from the infeed conveyor 14 plate 2 at a predetermined clamping position by the positioning conveyor 31, supports the plate 2 from below through the lower receiving section 32 and clamps the plate 2 then through the clamps 33 . After the disk holding portion 21 holds the disk 2 has held, the movable table section moves 22nd the disk holding portion 21 to hold the disk 2 below the plate contact area R of the screen mask 13th to position.

When the plate 2 is located below the plate contact area R, the camera 16 is moved, the upper image recording unit 16a takes pictures of mask-like markings 13m ( 4th ) provided in the plate contact area R from below, and the lower image pickup unit 16b takes images of plate-side marks 2m ( 3 ) of the disk held by the disk holding section 2 from above. When the image capture by the camera 16 ends, the plate holding and moving mechanism 12 moves the plate 2 so that the mask-side markings 13m and the plate-side markings 2m coincide in a plan view, and then lifts the plate 2 on to the plate 2 in contact with the plate contact area R. Accordingly, the electrodes 2d are exposed on a surface side of a mask plate in alignment with the corresponding pattern opening 13h.

When the plate 2 is in contact with the board contact portion R as described above, the front terminal 33F is in contact with a lower surface of the screen mask 13th in a front portion of the board contact portion R, and the rear clip 33R is in contact with a lower surface of the screen mask 13th in a rear area of the board contact area R. In the present embodiment, an upper surface area of a portion where the front terminal 33F with the screen mask 13th is in contact, referred to as a front standby area TF, and an upper surface area of a portion where the rear terminal 33R is in contact with the screen mask 13th is in contact is called the rear standby area TR (see 4th ). The front standby area TF and the rear standby area TR are each an area in which the paste is located Pst standby before printing starts. In the present embodiment, the paste is Pst first fed to the front standby area TF (see 4th ).

An overview of the screen printing process by the screen printing device 1 is as follows. First is the paste supplied Pst from the squeezers 42 scraped off to the pattern opening 13h of the screen mask 13th with the paste Pst to fill. Then the squeezers 42 lowered to the stop height position so that the paste wiping surfaces of the squeegee 42 with the paste Pst are in contact. Then the moving base 41 is moved backward to the squeezers 42 via the screen mask 13th to push so that the paste Pst is scraped off. The paste occurs accordingly Pst through the pattern opening 13h and is applied to the electrodes 2d of the plate 2 printed.

the 24 , 25th , 26th and 27 are a paste explanatory diagrams Pst Recovery operation performed by the screen printing device 1 is performed in accordance with the embodiment of the present disclosure.

As in 24 is shown in the screen printing device 1 when a model is changed, the second screen mask 13R that is a next model, sent from a back to a front.

As in 25th shown is the crimping head 17th raised. The disk holding section 21 is lowered. The crush head 17th becomes just in front of the frame member 13W on a rear end side of the first screen mask 13F emotional. The poles 97 the cylinder 99 are lowered.

As in 26th shown are the squeeze head 17th and the disk holding portion 21 is moved rearward. Accordingly, the frame member 13W of the first screen mask abuts 13F to the frame element 13W of the second screen mask 13R . The poles 97 are raised. The crush head 17th is moved forward.

As in 27 shown is the solder paste recovery device 71 through the recovery unit raise-and-lower cylinder 101 lowered. As in 9 is shown while the crush head 17th is moved in the direction n, in which the squeezing head 17th the paste Pst approaching the sheet 75 moved in the first direction a, and the paste Pst is through the stop section 73 recovered.

the 28 , 29 , 30th and 31 are explanatory diagrams of a paste feeding operation Pst coming from the screen printing device 1 is performed in accordance with the embodiment of the present disclosure.

As in 28 is shown in the screen printing device 1 the recovery unit raise-and-lower cylinder 101 driven to the solder paste recovery device 71 raise that the paste Pst recovers. At the same time, the plate holding portion 21 is lowered. The crush head 17th is further back from the second screen mask 13R emotional. The cylinders 99 are driven and the rods 97 be behind the Frame element 13W of the second screen mask 13R lowered.

As in 29 shown moves the screen printing device 1 the squeeze head 17th forward to the second mask 13R and the first screen mask 13F to move. The second screen mask is accordingly 13R moved to the printing position. The screen printing device 1 lifts the bars 97 at. The screen printing device 1 moves the squeeze head 17th forward and places the squeezing head 17th at the printing position. At this time, the screen printing device arranges 1 the solder paste recovery device 71 directly above the front clamp 33F.

As in 30th shown drives the screen printing device 1 the recovery unit raise-and-lower cylinder 101 to the solder paste recovery device 71 lower, and place the paste Pst onto the front clamp 33F. At this time, the disk holding section 21 is raised at the same time, and the clamps 33 are in contact with a lower surface of the second screen mask 13R . As in 10 is shown, while the squeezing head 17th in the direction s of the paste Pst is moved away, the sheet 75 moved in the second direction b, and the paste Pst becomes the second screen mask 13R fed. After adding the paste Pst becomes the solder paste recovery device 71 withdrawn slightly to a position that accommodates the solder paste recovery device 71 not in contact with the paste Pst is.

Finally, as in 31 shown, the recovery unit raise-and-lower cylinder 101 driven to the solder paste recovery device 71 to raise. Accordingly, the paste recovery device operates 71 in the screen printing device 1 a transfer of the paste Pst from the first screen mask 13F to the second screen mask 13R .

In the present embodiment, an operation will be described based on a case where the paste Pst is recovered on a front side (an F-side) and fed on the front side (the F-side), but in addition to this, the recovery and feeding operation of the screen printing device 1 also as recovery on the front (F-side) and feed on the rear (R-side), recovery on the rear (R-side) and feed on the front (F-side) or recovery on the rear (R-side ) and feed on the rear (R-side) can be adjusted.

Next is a feeding operation of the sheet 75 described that of the solder paste recovery device 71 is carried out.

32 Fig. 13 is a flow chart of the sheet feeding process performed by the screen printing device 1 is performed in accordance with the embodiment of the present disclosure.

First, a process will be described, for example, in which a model on a model of the same paste Pst is switched after 24 hours or more has passed since a previous model was switched. A target time for feeding sheets is set to, for example, 24 hours.

In this case, when starting the model switchover, the recovery and supply control unit 70 determines whether or not the elapsed time has exceeded the set time (see description above) (St1). When the elapsed time has exceeded the set time, the recovery unit 70 sends a signal to feed the sheet to the conveying section 77 . The stage of promotion 77 having the sheet feed signal, drives the winding-side roller motor 85 and the supply-side roller motor 83 to wrap the sheet 75 feed (St2). After the sheet 75 has been fed, the paste recovery device starts 71 a recovery process of the paste Pst (St3). Accordingly, the paste recovery device performs 71 the leaf 75 before the recovery process and starts the recovery process on the new surface 137.

Next, a description will be given, for example, of a process in which a model is pasted onto the model of the same paste Pst is switched after 3 hours have passed since the previous model was switched. The set time for sheet feeding is also set to, for example, 24 hours.

In this case, when starting the model switching, the soldering recovery and supply control unit 70 determines whether the elapsed time has exceeded the set time (St1) or not. If the elapsed time has not exceeded the set time, the recovery unit 70 does not send a signal to feed the sheet to the conveying section 77 . Hence the conveyance section leads 77 the leaf 75 not to (St4). Next, the sorting unit determines 135 whether there is a change in the type of paste Pst gives (St5).

If there is no change in the type of paste Pst over the previous model, the solder paste recovery and supply control unit 70 does not send a sheet feed signal to the conveying section 77 . Hence the conveyance section leads 77 the leaf 75 (St6) not to. Accordingly, the paste recovery device starts 71 the recovery process using the same surface area of the sheet 75 used in the previous model (St7).

Next, a description will be given, for example, of an operation when one model is paste onto a model of the other Pst is switched after 3 hours have passed since the previous model was switched. The set time for feeding the sheets is also set to 24 hours.

In this case, when the model switching is started, the recovery and supply control unit 70 determines whether or not the elapsed time has exceeded the set time (St1). If the elapsed time has not exceeded the set time, the recovery unit 70 does not send a signal to feed the sheet to the conveying section 77 . Hence the conveyance section leads 77 the leaf 75 not to (St4). Next, the sorting unit determines 135 whether there is a change in the type of paste Pst gives (St5). If the type of paste Pst has changed from the previous model, the solder paste and solder supply control unit 70 sends the signal to supply the sheet to the conveying section 77 . Hence the conveyance section drifts 77 the winding-side roller motor 85 and the supply-side roller motor 83 to drive the sheet 75 (St8) to be supplied. After the sheet 75 has been fed, the paste recovery device starts 71 the paste recovery process Pst (St9). Accordingly, the paste recovery device performs 71 the leaf 75 before the recovery process and begins the recovery process on the new surface 137.

Next are the functions of the screen printing device 1 according to the embodiment described above in detail.

The solder paste recovery device 71 wins the paste Pst on the first screen mask 13F and delivers the recovered paste Pst on the second screen mask 13R that differs from the first screen mask 13F differs. The solder paste recovery device 71 includes the stop portion 73 , the one on the first screen mask 13F or the second screen mask 13R is attached to the sheet 75 that is about the stop section 73 in the first direction a to recover the paste Pst or the second direction b for feeding the paste Pst is transported, and the transport section 77 who made the sheet 75 transported in the first direction a or the second direction b. At the head end of the stop section 73 is the opposite face 107 provided that the first screen mask 13F and the second screen mask 13R is opposite at the first angle α. The stop section 73 is in relation to the first screen mask 13F and the second screen mask 13R inclined by the second angle β which is greater than the first angle α.

According to the solder paste recovery device 71 becomes the paste Pst recovered and through the stop section 73 fed. The stop section 73 is formed from a thin plate having substantially the same width dimension as a dimension in a width direction orthogonal to a pressing direction of the squeegees 42 . The leaf 75 that is substantially the same width dimension as a dimension of the stopper portion 73 in a width direction and has a pointed end edge of the stopper portion 73 covers, is around the stop section 73 across the front and back of the stop section 73 wrapped. The two ends of the sheet 75 in the longitudinal direction perpendicular to the width direction are of the supply-side roller 79 and the winding-side roller 81, which the conveying section 77 form, coiled and held. The supply-side roller 79 and the winding-side roller 81 are rotated in synchronism with each other, so that the conveyance section 77 the leaf 75 in a direction from one surface side to the other surface side of the stopper portion 73 (see first direction a) or in one direction on an opposite side (see second direction b). One surface is a lower surface of the stop section 73 . The other surface is an upper surface of the stopper portion 73 .

The opposite face 107 is at the head end of the stop section 73 educated. The stop section 73 hits the screen mask from above 13th based on the screen mask 13th . Hence the opposite face 107 a tip end on a lower surface side of the tip end of the stopper portion 73 . The leaf 75 is made by covering the opposite face 107 emotional. The opposite face 107 is the first screen mask 13F and the second screen mask 13R facing at the first angle α. The leaf 75 is between the opposite face 107 and the screen mask 13th trapped. That is, the stop section 73 is not directly on the screen mask 13th on, but lies over the sheet 75 on the screen mask 13th at.

A base end side of the stopper portion 73 that does not match the opposite surface is in terms of the screen mask 13th inclined by the second angle β, which is greater than the first angle α. Hence the stopper portion 73 gradually from the screen mask 13th away towards the base end side. Because the sheet 75 is moved, while it is in substantially close contact with the front and rear surfaces of the stop section 73 stands, the leaf moves away 75 in a similar way gradually from the screen mask 13th toward the base end side of the stopper portion 73 .

When the solder paste recovery device 71 the paste Pst from the first screen mask 13F recovers, becomes the tip end of the stopper portion 73 in a boundary section between the first screen mask 13F and the one on the first screen mask 13F arranged paste Pst introduced. At this point the sheet will 75 simultaneously moved in the first direction a. A movement amount of the sheet 75 is set to match the amount of movement when inserting the stopper section 73 matches. Hence there is a shear force acting on the paste Pst works when the paste Pst on the screen mask 13th from the screen mask 13th peeled off and transferred to the sheet, in the paste Pst only at the head end of the stop section 73 generated. Hence the paste Pst that is at the pointed end of the stop section 73 is sheared and placed on the sheet, then in a stable shape (ie, a uniform shape) on the upper surface of the stopper portion 73 transferred without an external force acting on it.

On the other hand, the paste recovery device moves 71 the leaf 75 in the second direction b when the recovered paste Pst the second screen mask 13R is fed. The stop section 73 moves the paste Pst on the paper 75 by the movement of the leaf 75 to a feed position of the second screen mask 13R . At this point, the stop section 73 in a direction away from the simultaneously moving paste Pst emotional. An amount of movement of the stopper portion 73 is set to match the amount of movement of the sheet 75 is equivalent to. Therefore, a shear force acts when the paste Pst on the paper 75 from the sheet 75 peeled off and on the second screen mask 13R is moved, only at the front end of the stop section 73 on the paste Pst . Therefore, the sheet 75 peeled paste Pst in a stable form (ie in a uniform shape) on the upper surface of the second screen mask 13R be transmitted.

The stop section 73 is provided so that it is inclined by the second angle β, which is a larger angle than the first angle α at which the opposite surface 107 of the stop section 73 the screen mask 13th is facing. Hence the shear of the paste Pst even if the sheet 75 is transported in the first direction a or the second direction b, only on the front end of the stopper portion 73 limited. Hence the paste Pst that slightly on the sheet 75 remains, prevented, on the screen mask 13th to adhere when the sheet 75 is transported. Therefore, the paste can Pst can be recovered and fed while preventing the occurrence of the printing error.

The shape of the paste Pst is uniform, so that a pressure during printing through the squeegee 42 can be made uniform. Accordingly, the paste recovery device 71 prevent printing errors from occurring.

The shape of the paste Pst is uniform so no leveling on the paste Pst required are. As a result, the paste recovery device 71 a working time (a so-called cycle time) for printing the paste Pst on a plate 2 shorten and improve productivity.

Because shearing off the paste Pst does not occur in a large area, can be a lot of the paste Pst adhering to a mechanism can be reduced, and the cleaning work can be facilitated.

In the solder paste recovery device 71 the first angle α is 0 degrees, and the opposite surface 107 is the first screen mask 13F and the second screen mask 13R facing parallel.

According to the solder paste recovery device 71 is the first angle α of the opposite surface 107 who have favourited the first screen mask 13F and the second screen mask 13R opposite, 0 degrees. The opposite face 107 is on a lower surface of the tip end of the stopper portion 73 educated. The base end side of the stop section 73 that is not opposite the facing surface is in relation to the screen mask 13th inclined by the second angle β, which is greater than the first angle α. The stop section 73 is formed with the same sheet metal thickness at the second angle β with the exception of the tip end. That is, the entire upper surface of the stopper portion 73 has the second angle β. Therefore, the tip end is the stopper portion 73 enclosed between the first angle α and the second angle β and has a conical shape which gradually becomes thinner towards the tip end. Accordingly, the stop section 73 the thin tip end into an interface between the screen mask 13th and the paste Pst introduce. As a result, the paste recovery device 71 one in the paste Pst limit the generated shear point to a fairly narrow area and the effect of preventing the paste from deforming Pst continue to improve.

In the solder paste recovery device 71 is the leaf 75 a sheet of PTFE.

According to the solder paste recovery device 71 is the leaf 75 a PTFE sheet so that friction with the paste Pst can be reduced as compared with a vinyl sheet or the like. The leaf 75 , which has low friction, is particularly advantageous when feeding the paste Pst . That is, when feeding the paste Pst to the screen mask 13th moves the solder paste recovery device 71 the leaf 75 in the second direction b and moves the paste Pst on the sheet to the feed position of the screen mask 13th . At the same time, the stop section 73 in the direction away from the paste Pst emotional. At this point the paste can Pst in a more stable form (ie in a more uniform form) onto the screen mask 13th transferred because of the friction with the sheet 75 is less. Accordingly, the PTFE sheet for the sheet becomes 75 used so the solder paste recovery device 71 a form of the screen mask 13th transferred paste Pst can stabilize as compared with a case where the vinyl sheet is used.

The screen printing device 1 prints the paste Pst on the plate 2 via the first screen mask 13F or the second screen mask 13R that differs from the first screen mask 13F differs. The screen printing device 1 includes the solder paste recovery device 71 who have favourited the paste Pst on the first screen mask 13F recovered and paste recovered Pst on the second screen mask 13R supplies. The solder paste recovery device 71 includes the stop portion 73 , the one on the first screen mask 13F or the second screen mask 13R is attached to the sheet 75 that is about the stop section 73 in the first direction a to recover the paste Pst or in the second direction b for feeding the paste Pst is transported, and the transport section 77 who made the sheet 75 transported in the first direction a or in the second direction b. At the front end of the stop section 73 is the opposite face 107 provided that the first screen mask 13F and the second screen mask 13R is opposite at the first angle α. The stop section 73 is in relation to the first screen mask 13F and the second screen mask 13R inclined by the second angle β, which is greater than the first angle α.

According to the screen printing device 1 can the paste Pst can be recovered and supplied while the occurrence of the printing error by the same functions as those of the solder paste recovery device 71 is prevented in which the abutment portion described above 73 is inclined at the second angle β which is greater than the first angle α.

The shape of the paste Pst is even, so the pressure during printing through the squeegee 42 can be made evenly. Accordingly, the occurrence of the printing error can be prevented.

The shape of the paste Pst is uniform so no work on leveling the paste Pst required are. This can reduce the working time (the so-called cycle time) for printing the paste Pst on a plate 2 can be shortened and productivity improved.

Furthermore, because of the shear of the paste Pst does not occur in a large area, a lot of the paste Pst sticking to a mechanism can be reduced, and cleaning work can be facilitated.

In the screen printing device 1 the first angle α is 0 degrees, and the opposite surface 107 is the first screen mask 13F and the second screen mask 13R facing parallel.

According to the screen printing device 1 can one in the paste Pst generated shear point can be limited to a fairly narrow area, and an effect of preventing the paste from deforming Pst can be further improved by the same functions as those of the solder paste recovery device 71 where the above-described first angle α is set to 0 degrees and the opposite surface 107 the screen mask 13th parallel opposite.

At the screen printing device 1 is the leaf 75 a sheet of PTFE.

According to the screen printing device 1 can be some form of the on the screen mask 13th transferred paste Pst compared with a case where a vinyl sheet is used, by the same functions as those of the solder paste recovery device 71 be stabilized in the PTFE sheet for the sheet described above 75 is used.

The screen printing device 1 also includes the scraper 111 which is the paste left on the sheet Pst strips off.

According to the screen printing device 1 becomes the sheet 75 when feeding the paste Pst to the screen mask 13th moved in the second direction b. The stop section 73 moves the paste Pst on the sheet of the screen mask 13th by the movement of the leaf 75 . The moving sheet 75 is on a lower surface side of the stopper portion 73 arranged. At this point the paste can Pst slightly on the surface of the sheet moved to the lower surface side 75 be liable. The scraper 111 is in contact with the surface of the sheet 75 that is moved to the lower surface side. When the sheet 75 the scraper 111 happens, therefore, the paste left on the surface becomes Pst through the scraper 111 scraped off. Accordingly, the recovered paste can be prevented Pst when recovering the next paste Pst on the remaining paste Pst is stacked. This allows the screen printing device 1 some form of the recovered paste Pst stabilize on the leaf.

The screen printing device 1 also includes the clamps 33 that the plate positioned at a predetermined printing position 2 grab from both sides, and a table on which the clamps 33 are arranged and on which the terminals 33 can be moved in the up-down direction. When the solder paste recovery device 71 the paste Pst recovers or feeds in, the table is supported by the clamps 33 on the lower surface of the first screen mask 13F or the second screen mask 13R away.

According to the screen printing device 1 when the solder paste recovery device 71 the paste Pst recovers or feeds, the table (for example, the movable table section 22nd ) the clamps 33 against the lower surface of the screen mask 13th . When recovering or feeding the paste Pst from or to the screen mask 13th pushes the solder paste recovery device 71 over the sheet 75 at the pointed end of the stop section 73 on the screen mask 13th . Pressing creates the screen mask 13th bent. The bend allows between the screen mask 13th and the pointed end of the stopper portion 73 a gap is created, which is referred to as a gap. In the solder paste recovery device 71 can the paste Pst on the screen mask 13th remain as the gap between the sheet 75 and the screen mask 13th is generated and the adhesion between the screen mask 13th and the sheet 75 is decreased.

When the solder paste recovery device 71 in the screen printing device 1 the paste Pst recovers or feeds, the terminals bump 33 therefore on the underside of the screen mask 13th at. That is, when the screen printing device 1 when recovering or feeding the paste Pst the clamps 33 lifts and the clamps 33 at the bottom of the screen mask 13th are in contact, an overlay is created so that the screen mask 13th is not bent. There is a sag in the screen mask 13th is prevented, the screen printing device can 1 accordingly the adhesion between the screen mask 13th and the sheet 75 improve and a stickiness of the paste Pst complicate on the sheet.

In the screen printing device 1 becomes the sheet 75 against the opposite surface 107 pressed so that the sheet 75 in an area that is at least equal to or greater than the opposite area 107 is, with the first screen mask 13F and the second screen mask 13R is in contact.

According to the screen printing device 1 is the leaf 75 with the screen mask 13th in the area in contact which is at least equal to or greater than the opposite surface 107 . The leaf 75 covers the tip end of the stopper portion 73 and is from the top to the bottom of the stop section 73 around the stop section 73 wrapped. Hence the leaf 75 with the screen mask 13th grounded in a state in which there is the stopper portion 73 covers.

If a shape of the tip end of the opposite face 107 is a right angle, there is a ground plane between the screen mask 13th and the sheet 75 small, and the paste Pst can on the screen mask 13th remain.

In contrast, in the screen printing device 1 a shape of the opposite face 107 that is at the pointed end of the stop section 73 is formed parallel to the mask. Accordingly, the opposite face can 107 of the stop section 73 a larger grounding area between the screen mask 13th and the sheet 75 compared with a case where the shape of the tip end is the right angle. As the ground area is increased, the opposite area can 107 of the stop section 73 the adhesion between the screen mask 13th and the sheet 75 improve and a sticking of the paste Pst on the screen mask 13th and the sheet 75 prevent during recovery or delivery.

In the screen printing device 1 becomes the stop section 73 moves in a direction that is consistent with the paste Pst when the sheet approaches 75 is transported in the first direction a, in which the paste Pst is recovered.

According to the screen printing device 1 becomes the tip end of the stopper portion 73 in the border section between the screen mask 13th and the paste placed on it Pst introduced when the stop section 73 the paste Pst from the screen mask 13th records. That is, the stop section 73 is in the direction of approaching the paste Pst emotional. At the same time the sheet 75 moved in the first direction a. A movement amount of the sheet 75 is set to be the Amount of movement when inserting the stop section 73 is equivalent to. Hence there is a shear force acting on the paste Pst works when the paste Pst on the screen mask 13th from the screen mask 13th peeled off and transferred to the sheet, in the paste Pst only at the tip end of the stop section 73 generated. Hence the paste Pst that is at the pointed end of the stop section 73 is sheared and placed on the sheet, then in a stable shape (ie, a uniform shape) on the upper surface of the stopper portion 73 transferred without an external force acting on it.

In the screen printing device 1 becomes the stop section 73 in one direction away from the paste Pst moved when the sheet 75 is transported in the second direction b, in which the paste Pst is fed.

According to the screen printing device 1 becomes the sheet 75 moves in the second direction b when the stopper portion 73 the paste Pst the screen mask 13th feeds. The stop section 73 moves the paste Pst on the sheet by moving the sheet 75 to the feeding position of the screen mask 13th . The stop section 73 in one direction away from the moving paste Pst emotional. An amount of movement of the stopper portion 73 is set to match the amount of movement of the sheet 75 is equivalent to. Therefore, the shear force acts when the paste Pst on the sheet of the sheet 75 peeled off and on the screen mask 13th is moved, only at the front end of the stop section 73 on the paste Pst . Therefore, the sheet 75 peeled paste Pst in a stable shape (a uniform shape) on the top surface of the screen mask 13th be transmitted.

The screen printing device 1 prints the first paste Pst on the first record 2 using the first screen mask 13F and prints the second paste Pst on the second plate 2 using the second screen mask 13R that differs from the first screen mask 13F differs. The screen printing device 1 includes the solder paste recovery device 71 who have favourited the first paste Pst on the first screen mask 13F and the second paste Pst on the second screen mask 13R recovers. The solder paste recovery device 71 includes the stop portion 73 , the one on the first screen mask 13F or the second screen mask 13R is attached to the sheet 75 that is about the stop section 73 is transported, and the transport section 77 who made the sheet 75 transported. The screen printing device 1 includes the sorting unit 135 who have favourited the first solder paste Pst and the second solder paste Pst sorted, and the recovery and feeding control unit 70 (an example of a control unit) that controls the conveyance of the sheet 75 through the transport section 77 controls based on a result of sorting.

According to the screen printing device 1 can consumption of the sheet 75 can be suppressed by feeding and returning the sheet 75 is repeated. The screen printing device 1 can be the first paste Pst on the first record 2 print and can paste the second Pst on the second plate 2 that is to be printed next. That is, in the screen printing device 1 can be in one printing step of the plate 2 the plate to be printed 2 from the first record 2 that is currently being printed on the second plate 2 of a different type (model-switched). At this point the paste can Pst that are on the second plate 2 used will be the same as the paste Pst that was on the first plate 2 is used (the first paste Pst ), or it can be a paste Pst exhibit that differ from the paste Pst differs that on the first plate 2 is used (the second paste Pst ).

In a conventional screen printing device, when the screen mask is replaced 13th the one on the screen 13th remaining paste Pst onto a vinyl sheet provided in a recovery device and scraped off by sliding the squeegees 42 recovered towards one side of the recovery device. If in this case the paste Pst from the screen mask 13th recovered or fed to it, some of the paste remains Pst on the vinyl sheet. In such a state when the screen printing with different kinds of pastes Pst Before and after the model switching is carried out, a paste will be made Pst before switching models and a paste Pst after the model switching, which remain in the same area of the vinyl sheet are mixed together, and a production error may result.

Therefore, the screen printing device detects 1 through the sorting unit 135 during the model switching, whether a change in the paste Pst is present. The screen printing device 1 has a type of paste Pst that are on the second plate 2 is used after the model switching, as parameters, such as the model-specific production data stored in advance. If there is any type of the first paste used in a previous model Pst of one type of the second paste used in a next model Pst differs, the paste recovery and supply control unit 70 controls the conveyance section 77 the solder paste recovery device 71 on to the sheet 75 prior to a second paste recovery operation Pst through the solder paste recovery device 71 to feed. Accordingly, the paste recovery device 71 prevent different types of Pastes Pst be mixed on the sheet by the new surface 137 of the sheet 75 is used after the model change.

Hence the sorting unit 135 and the solder paste recovery device 71 locked together so that the screen printing device 1 can automatically prevent different types of pastes Pst can be mixed during the model change, prevent the occurrence of production errors and stabilize the print quality.

In the screen printing device 1 The solder paste recovery device and the control device 70 convey the sheet 75 not if the types of the first solder paste Pst and the second paste Pst are the same as a result of the sorting.

According to the screen printing device 1 When switching a model, the solder paste recovery and supply control unit 70 causes the sorting unit 135 , two pieces of information about the paste Pst to sort. The sorting unit 135 compares whether the types of the first paste Pst and the second paste Pst are equal, and sends a result thereof to the recovery and supply control unit 70. If one from the sorting unit 135 sent result of the comparison between the first paste Pst and the second paste Pst indicates that the types are the same, the solder recovery and supply control unit 70 causes the conveyance section 77 not the sheet 75 to transport.

Accordingly, in the screen printing apparatus 1 even if the first paste Pst of the previous model on the sheet 75 remains, the print does not hinder, as the second paste Pst of the next model is also of the same type, even if the pastes Pst to be mixed on the sheet. Furthermore, the screen printing device 1 the consumption of the sheet 75 suppress as the sheet 75 is not fed in unnecessarily.

In the screen printing device 1 when the types of the first paste Pst and the second paste Pst are different from each other due to the sorting unit, the recovery and supply control unit 70 causes the conveyance section 77 , the leaf 75 to transport.

According to the screen printing device 1 When switching a model, the solder paste recovery device and the control device 70 cause the sorting unit 135 , two pieces of information about the paste Pst to sort. The sorting unit 135 compares whether the types of the first paste Pst and the second paste Pst are equal, and sends a result thereof to the recovery and supply control unit 70. If that, from the sorting unit 135 sent result of the comparison between the first paste Pst and the second paste Pst indicates that the types are different, the solder recovery and supply control unit 70 causes the conveyance section 77 , the leaf 75 to transport.

Accordingly, in the screen printing apparatus 1 even if the first paste Pst of the previous model on the sheet 75 remains, the second paste Pst of the next model, which is of a different type, is recovered and fed on the new sheet surface. This will be in the screen printing device 1 different types of first paste Pst and the second paste Pst not mixed with each other and the pressure is not hindered during the model change.

The screen printing device 1 also includes the timer 139 that measures an elapsed time since the previous model switch. When the timer 139 When the measured elapsed time exceeds a predetermined time, the solder recovery and supply control unit 70 causes the conveyance section 77 , the leaf 75 to transport.

According to the screen printing device 1 when the paste Pst is supplied together with the start of printing, the solder paste recovery and supply control unit 70 initiates the timer 139 to start timing. If an elapsed time during the same paste Pst is used exceeds a predetermined time, the recovery and supply control unit 70 sends a control signal to transport the sheet 75 to the transport section 77 . When the elapsed time exceeds a predetermined time in a use state in which the paste Pst Exposure to the atmosphere can degrade the paste Pst progress. In the screen printing device 1 can when a predetermined time is exceeded by the conveyance of the sheet 75 prevent those on the sheet 75 remaining deteriorated paste Pst with a new paste Pst is mixed even if it is the same type of paste Pst acts. Accordingly, the screen printing device 1 the paste Pst always use in the best condition and maintain good print quality continuously.

The screen printing method is a screen printing method for printing the first paste Pst on the first record 2 using the first screen mask 13F and to print the second paste Pst on the second plate 2 using the second screen mask 13R that differs from the first screen mask 13F differs. The screen printing method includes the sorting step in which the sorting unit 135 caused the first paste Pst and the second paste Pst to sort when the first paste Pst on the first screen mask 13F and the second paste Pst on the second screen mask 13R is restored. The screen printing method includes the conveyance determination step of causing the solder recovery and supply control unit 70 to convey the over the stopper portion 73 conveyed sheet 75 that on the first screen mask 13F or the second screen mask 13R is to be controlled based on a result of the sorting step.

According to the screen printing method, it is through the same functions as those of the screen printing apparatus 1 including the sorting unit 135 and the solder paste recovery and supply control unit 70 described above as the sorting unit 135 and the solder paste recovery device 71 are locked, possible to automatically prevent different types of pastes Pst mixed during the model change to prevent the occurrence of the production defect and stabilize the print quality.

In the screen printing method, the recovery and supply control unit 70 determines when the types of the first paste in the step of determining the conveyance Pst and the second paste Pst as a result of the sorting step are the same that the sheet 75 is not promoted, and promotes the sheet 75 actually not.

According to the screen printing method, in a case where the types of the first paste Pst and the second paste Pst as described above are the same by the same functions as those of the screen printing device 1 who have favourited the sheet 75 not conveyed, the printing does not hinder even if the first paste Pst of the previous model on the sheet 75 remains as the second paste Pst of the next model is also of the same type, even if the pastes Pst are mixed on the sheet. Furthermore, in the screen printing method, since the sheet 75 is not unnecessarily fed, the consumption of the sheet 75 be suppressed.

In the screen printing method, the sorting unit 70 determines when the types of the first paste in the step of determining the conveyance Pst and the second paste Pst as a result of the sorting step are different from each other that the conveying section 77 the leaf 75 promotes, and initiates the promotion section 77 , the leaf 75 actually to be promoted.

According to the screen printing method, if the types of the first paste Pst and the second paste Pst as described above are different from each other by the same functions as those of the screen printing device 1 who have favourited the sheet 75 transported, different types of the first paste Pst and the second paste Pst not mixed with each other, and printing is not hindered during model change.

The screen printing method further includes the timing step of measuring the elapsed time since the previous model switching by the timer 139 . In the promotion determining step, if one by the timer 139 When the measured elapsed time exceeds a predetermined time, the solder recovery and supply control unit 70 determines the conveyance section 77 to cause the sheet 75 to be carried and initiates the stage of carriage 77 , the leaf 75 actually to be promoted.

According to the screen printing method, when triggered by the above-described timer 139 measured elapsed time exceeds the predetermined time by the same functions as those of the screen printing device 1 who have favourited the sheet 75 promoted, always the paste Pst can be used in the best condition, and good print quality can be continuously maintained.

The screen printing device 1 prints the paste Pst using the screen mask 13th on the plate 2 . The screen printing device 1 includes the crimping head 17th , the one above the screen mask 13th slides to the squeezer 42 to print the paste Pst on the plate 2 in the up-down direction to move the auto mask placement unit 91 that next to the crush head 17th is provided and the screen mask 13th positioned, and the solder paste recovery device 71 who have favourited the paste Pst on the screen mask 13th recovered and between the squeeze head 17th and the auto mask placement unit 91 is provided.

According to the screen printing device 1 can the solder paste recovery device 71 on the squeeze head 17th be attached. The crush head 17th slides over the screen mask 13th and moves the squeezer 42 who have favourited the paste Pst on the plate 2 print in the up-down direction. The auto mask placement unit 91 for positioning the screen mask 13th using the mechanism in which the squeezing head 17th via the screen mask 13th slides, is on the squeezing head 17th assembled. The screen mask 13th is framed by the square frame member 13W, for example. The auto mask placement unit 91 uses, for example, the frame element 13W on the back of the screen mask 13th to open the screen mask 13th after the end of production (for example the first screen mask 13F ) and the screen mask 13th of the next model (for example the second screen mask 13R ) to move individually, or around the screen mask 13th after the end of production and the screen mask 13th of the next model to move at the same time to perform a positioning.

For example, if the first screen mask 13F and the second screen mask 13R are moved and positioned at the same time, the pinch head 17th assembled automatic mask placement unit 91 moved further back than the frame member 13W on the back of the second screen mask 13R . The movement position of the crush head 17th is a rear end moving position. Hence the screen printing device 1 usually provided with the frame 113 or the like of the device by being at a distance (for example at a distance of about 8 mm) from the crimping head 17th is located in which the frame 113 or the like of the apparatus is not with the crimping head moved to the rearmost end 17th interferes so that compactness is achieved.

Around the solder paste recovery device 71 Here it is desirable to add the solder paste recovery device 71 on the squeeze head 17th to mount, which is above the screen mask 13th moved because the solder paste recovery device 71 can also serve as a movement mechanism. In the squeeze head 17th however, it is only the small distance between the automatic mask placement unit 91 and the already assembled frame 113 is present, and when the solder paste recovery device 71 is re-assembled, the fore-aft direction (i.e. the depth direction) of the device must be lengthened. This can meet the market needs of the screen printing device 1 run counter to, which has had to become smaller and smaller in recent years.

Hence the screen printing device 1 configured so that the solder paste recovery device 71 on the auto mask placement unit 91 attached while the distance between the auto mask placement unit 91 and the frame 113 of the device remains unchanged. In this configuration, the solder paste recovery device is 71 between the crush head 17th and the auto mask placement unit 91 built in so that the solder paste recovery device 71 can be mounted without changing a depth of the device. That is, there is an arrangement in which the squeezing head 17th , the solder paste recovery device 71 and the auto mask placement unit 91 are arranged side by side from a front side to a rear side in this order.

In this arrangement those are for the auto mask placement unit 91 required cylinder 99 and the recovery unit raise-and-lower cylinder 101 to raise and lower the solder paste recovery device 71 parallel to the longitudinal direction of the squeezer 42 provided next to each other. That is, a plurality of (for example, three in the present embodiment) cylinders are arranged along a direction orthogonal to the depth direction. Accordingly, in the screen printing device 1 the solder paste recovery device 71 into a gap between the squeezers 42 and the auto mask placement unit 91 without requiring a large additional space in the depth direction of the device.

In the screen printing device 1 includes the solder paste recovery device 71 the first essay. The auto mask placement unit 91 includes the second article, which corresponds to the first article. The solder paste recovery device 71 is with the mask auto placement unit 91 detachably connected using the first attachment and the second attachment.

According to the screen printing device 1 is the solder paste recovery device 71 that between the crush head 17th and the auto mask placement unit 91 is arranged, detachable through the first attachment and the second attachment. The solder paste recovery device 71 includes the transport section 77 . The stage of promotion 77 includes the feed-side roller 79 that holds the sheet 75 executes, and the winding-side roller 81 that the sheet 75 winds up. When everyone rolls 99 are wound from the supply side roller 79 to the winding side roller 81, the conveyance section 77 replace the feed-side roller 79 and the winding-side roller 81. With such maintenance, the paste recovery device 71 can be easily attached and detached by the first attachment and the second attachment. In other words, the solder paste recovery device 71 is configured to have a detachable structure so that additional installation can be realized using a narrow space without securing a work space for component replacement.

In the screen printing device 1 includes the auto mask placement unit 91 also the frame 95 parallel to the longitudinal direction of the squeezer 42 and the cylinders 99 that make up the poles 97 sticking out, the rods 97 at both ends of the frame 95 with the screen mask 13th are lockable.

According to the screen printing device 1 includes the auto mask placement unit 91 the frame 95 . The frame 95 is a long element that is parallel to the longitudinal direction of the crusher 42 runs. The cylinders 99 who have favourited the poles 97 with the frame element 13W of the screen mask 13th engage are at both ends of the frame 95 attached lengthways. As part of 95 is between the pair of cylinders 99 one of the squeezers 42 Separate space made in the screen printing device 1 to a housing space of the solder paste recovery device 71 is upset. That is, the screen printing device 1 effectively uses a space created without a mechanical arrangement of elements as an installation space of the solder paste recovery device 71 . As a result, the screen printing device reduces 1 wastes space, increases the density of the component arrangement and prevents enlargement of the apparatus while additionally installing a new mechanism.

In the screen printing device 1 includes the crimping head 17th the connector that connects the solder paste recovery device 71 and the solder paste recovery device 71 further includes the power cord 127 that can be attached to and detached from the connector, and the locking portion 131 holding the power cord 127 can lock.

According to the screen printing device 1 includes the crimping head 17th the connector that connects the solder paste recovery device 71 powered. In the solder paste recovery device 71 is the power cord 127 connected to the connector to get a power supply. The mating connector 129 coupled to the connector is at one end of the cable with the power cable 127 tied together. When the solder paste recovery device 71 from the squeeze head 17th is removed, the mating connector 129 is decoupled from the connector. At this point the power cord is in place 127 in the solder paste recovery device 71 , since the connection of the cable end is released, in a free state and hangs down. The mating connector 129 at the end of the cable is identical to that in the solder paste recovery device 71 provided locking section 131 locked so that the power cord 127 is held securely without coming into contact with other parts. Accordingly, in the screen printing apparatus 1 the practicality of attaching and detaching the solder paste recovery device 71 be improved.

The screen printing device 1 also includes the raising and lowering cylinder 101 the recovery unit, from which the lifting and lowering rod 103 in the same direction as the poles 97 in the middle of the frame 95 and the recovery unit support rod 105 that are parallel to the frame 95 at a protruding tip end of the raising and lowering rod 103 runs. The second attachment is, for example, with a pair of convex portions 117 configured on both sides of the recovery unit support rod 105 are provided in the longitudinal direction. The first attachment is, for example, with the pair of drilling elements 115 configured, each on the pair of convex portions 117 are appropriate.

According to the screen printing device 1 is the recovery unit raise and lower cylinder 101 in the middle of the frame 95 intended. The recovery unit lift and lower cylinder 101 includes the lifting and lowering rod 103 pointing in the same direction as that of the poles 97 protrudes. The recovery unit support pole 105 that are parallel to the frame 95 runs is at the head end of the lifting and lowering rod 103 appropriate. The recovery unit support pole 105 is with a pair of convex sections 117 provided that towards one side of the crusher 42 protrude. The pair of convex sections 117 serves as a second attachment. On the other hand, it is the solder paste recovery device 71 with a pair of drilling elements 115 provided that from the side of the squeezer 42 from introduced and attached to the convex sections 117 be attached. The pair of drilling elements 115 serves as the first attachment. The convex section 117 is formed in a columnar shape and an axis thereof is in the front-rear direction of the device. The drilling element 115 is in the convex section 117 from the side of the squeezer 42 is introduced from in a direction along the axis and from the mask auto placement unit 91 carried. Accordingly, the paste recovery device 71 on the auto mask placement unit 91 can be attached with simple attachment and detachment work and great supporting force.

The screen printing device 1 further includes support rod on the recovery unit 105 the disc spring elements 119 that releasably lock and in resilient contact with those on the convex portions 117 attached drilling elements 115 stand.

According to the screen printing device 1 becomes the drilling element 115 that is at the convex section 117 is attached, toward the side of the crusher 42 in a direction along an axis of the convex portion 117 moved so that the attachment to the convex portion 117 is resolved. The disc spring element 119 is in elastic contact with the drilling element 115 that is at the convex section 117 is attached, and prevents easy loosening of the drilling element 115 from the convex portion 117 . That is, when a release force is applied that is equal to or greater than a certain value, the disc spring element is 119 pressed and from the drilling element 115 removed so that the attachment of the drilling element 115 at the convex section 117 can be solved. Furthermore, the plate spring element is 119 formed with the tapered surface 125 containing the disc spring element 119 against the preload direction when inserting the drilling element 115 into the convex section 117 repels. Accordingly, the paste recovery device 71 when assembling the solder paste recovery device 71 by inserting the drilling elements 115 into the convex sections 117 can be assembled with the push of a button.

• [A1] Schirmdruckvorrichtung, die eine erste Lötpaste auf eine erste Platte unter Verwendung einer ersten Schirmmaske druckt und eine zweite Lötpaste auf eine zweite Platte unter Verwendung einer zweiten Schirmmaske, die sich von der ersten Schirmmaske unterscheidet, druckt, umfassend: eine Lötpastenrückgewinnungsvorrichtung, die die erste Lötpaste auf der ersten Schirmmaske zurückgewinnt und die zweite Lötpaste auf der zweiten Schirmmaske zurückgewinnt, wobei die Lötpastenrückgewinnungsvorrichtung einen Anschlagabschnitt umfasst, der an der ersten Schirmmaske oder der zweiten Schirmmaske anliegt, ein Blatt, das über den Anschlagabschnitt befördert wird, und einen Beförderungsabschnitt, der das Blatt befördert. Die Schirmdruckvorrichtung umfasst ferner eine Sortiereinheit, die die erste Lötpaste und die zweite Lötpaste sortiert, und eine Steuervorrichtung, die die Beförderung des Blattes durch den Beförderungsabschnitt auf der Basis eines Ergebnisses der Sortierung steuert.
• [A2] Schirmdruckvorrichtung gemäß oben beschriebenem [A1], bei der, wenn die Typen der ersten Lötpaste und der zweiten Lötpaste als Ergebnis der Sortiereinheit gleich sind, die Steuereinrichtung nicht veranlasst, das Blatt zu transportieren.
• [A3] Schirmdruckvorrichtung gemäß dem oben beschriebenen [A1], bei der, wenn die Typen der ersten Lötpaste und der zweiten Lötpaste als Ergebnis der Sortiereinheit voneinander verschieden sind, die Steuereinheit den Beförderungsabschnitt veranlasst, das Blatt zu befördern.
• [A4] Schirmdruckvorrichtung gemäß einem der oben beschriebenen [A1] bis [A3] des Weiteren umfassend: einen Timer, der eine verstrichene Zeit seit dem vorherigen Modellwechsel misst, wobei die Steuereinheit, wenn die von dem Timer gemessene verstrichene Zeit eine vorbestimmte Zeit überschreitet, den Beförderungsabschnitt veranlasst, das Blatt zu befördern.
• [A5] Schirmdruckverfahren, bei dem eine erste Lötpaste unter Verwendung einer ersten Schirmmaske auf eine erste Platte gedruckt wird und eine zweite Lötpaste unter Verwendung einer zweiten Schirmmaske, die sich von der ersten Schirmmaske unterscheidet, auf eine zweite Platte gedruckt wird, umfassend: einen Sortierschritt des Sortierens der ersten Lötpaste und der zweiten Lötpaste beim Wiedergewinnen der ersten Lötpaste auf der ersten Schirmmaske und beim Wiedergewinnen der zweiten Lötpaste auf der zweiten Schirmmaske; und einen Beförderungsbestimmungsschritt des Steuerns der Beförderung eines Blattes, das über einen Anschlagabschnitt befördert wird, der gegen die erste Schirmmaske oder die zweite Schirmmaske stößt, basierend auf einem Ergebnis des Sortierschrittes.
• [A6] Schirmdruckverfahren gemäß dem oben beschriebenen [A5], bei dem in dem Förderbestimmungsschritt, wenn die Typen der ersten Lötpaste und der zweiten Lötpaste als ein Ergebnis des Sortierschritts gleich sind, bestimmt wird, dass das Blatt nicht gefördert wird.
• [A7] Schirmdruckverfahren gemäß dem oben beschriebenen [A5], bei dem in dem Beförderungsbestimmungsschritt, wenn die Typen der ersten Lötpaste und der zweiten Lötpaste als Ergebnis des Kollationierungsschritts voneinander verschieden sind, das Blatt befördert wird.
• [A8] Schirmdruckverfahren gemäß einem der oben beschriebenen [A5] bis [A7] ferner umfassend: einen Zeitmessungsschritt des Messens einer verstrichenen Zeit seit dem vorherigen Modellwechsel durch einen Timer, wobei in dem Beförderungsbestimmungsschritt, wenn die durch den Timer in dem Zeitmessungsschritt gemessene verstrichene Zeit eine vorbestimmte Zeit überschreitet, das Blatt befördert wird.

The present disclosure also includes a configuration described below.

• [A1] A screen printing device that prints a first solder paste on a first board using a first screen mask and prints a second solder paste on a second board using a second screen mask different from the first screen mask, comprising: a solder paste recovery device that uses the recovering first solder paste on the first screen mask and recovering the second solder paste on the second screen mask, wherein the solder paste recovery device comprises a stop portion that abuts against the first screen mask or the second screen mask, a sheet that is conveyed over the stop portion, and a conveying portion that the sheet conveyed. The screen printing apparatus further includes a sorting unit that sorts the first paste solder and the second paste, and a control device that controls conveyance of the sheet by the conveying section based on a result of the sorting.
• [A2] The screen printing device according to [A1] described above, in which, when the types of the first paste solder and the second paste solder are the same as a result of the sorting unit, the controller does not cause the sheet to be conveyed.
• [A3] The screen printing apparatus according to [A1] described above, in which when the types of the first paste solder and the second paste solder are different from each other as a result of the sorting unit, the control unit causes the conveying section to convey the sheet.
• [A4] The screen printing apparatus according to any one of [A1] to [A3] described above, further comprising: a timer that measures an elapsed time since the previous model change, the control unit, when the elapsed time measured by the timer exceeds a predetermined time, causes the conveying section to convey the sheet.
• [A5] A screen printing method in which a first solder paste is printed on a first board using a first screen mask and a second solder paste is printed on a second board using a second screen mask different from the first screen mask, comprising: a sorting step sorting the first solder paste and the second solder paste when recovering the first solder paste on the first screen mask and when recovering the second solder paste on the second screen mask; and a conveyance determination step of controlling conveyance of a sheet conveyed over a stopper portion abutting the first screen mask or the second screen mask based on a result of the sorting step.
• [A6] The screen printing method according to [A5] described above, in which, in the conveyance determination step, when the types of the first paste solder and the second paste solder are the same as a result of the sorting step, it is determined that the sheet is not conveyed.
• [A7] The screen printing method according to [A5] described above, in which, in the conveyance determination step, when the types of the first paste solder and the second paste solder are different from each other as a result of the collation step, the sheet is conveyed.
• [A8] A screen printing method according to any one of [A5] to [A7] described above, further comprising: a time measuring step of measuring an elapsed time from the previous model change by a timer, wherein in the conveyance determining step, if the elapsed time measured by the timer in the time measuring step exceeds a predetermined time, the sheet is conveyed.

• [B1] Schirmdruckvorrichtung, die eine Lötpaste unter Verwendung einer Schirmmaske auf eine Leiterplatte druckt, umfasst: einen Quetschkopf, der oberhalb der Schirmmaske gleitet, um einen Quetscher zum Drucken der Lötpaste auf die Leiterplatte in einer Oben-Unten-Richtung zu bewegen; eine Positionierungsvorrichtung, die neben dem Quetschkopf vorgesehen ist und die Schirmmaske positioniert; und eine Lötpastenrückgewinnungsvorrichtung, die die Lötpaste auf der Schirmmaske zurückgewinnt und zwischen dem Quetschkopf und der Positionierungsvorrichtung vorgesehen ist.
• [B2] Di Schirmdruckvorrichtung gemäß dem oben beschriebenen [B1], bei der die Lötpastenrückgewinnungsvorrichtung eine erste Befestigung umfasst, die Positionierungsvorrichtung eine zweite Befestigung umfasst, die der ersten Befestigung entspricht, und die Lötpastenrückgewinnungsvorrichtung lösbar an der Positionierungsvorrichtung unter Verwendung der ersten Befestigung und der zweiten Befestigung befestigt ist.
• [B3] Schirmdruckvorrichtung gemäß dem oben beschriebenen [B1] oder [B2], bei der die Positioniervorrichtung ferner einen Rahmen parallel zu einer Längsrichtung des Quetschers und Zylinder umfasst, von denen Stangen abstehen, wobei die Stangen an beiden Enden des Rahmens mit der Schirmmaske verriegelbar sind.
• [B4] Schirmdruckvorrichtung gemäß einer der oben beschriebenen [B1] bis [B3], bei der der Quetschkopf einen Verbinder umfasst, der die Rückgewinnungsvorrichtung für Lötpaste mit Strom versorgen kann, und die Rückgewinnungsvorrichtung für Lötpaste ferner ein Stromkabel umfasst, das an dem Verbinder befestigt und von diesem abgenommen werden kann, sowie einen Verriegelungsabschnitt, der das Stromkabel verriegeln kann.
• [B5] Schirmdruckvorrichtung gemäß dem oben beschriebenen [B3], des Weiteren umfassend: einen Rückgewinnungseinheit-Hebe- und -Senkzylinder, von dem eine Hebe- und Senkstange in der gleichen Richtung wie die der Stange in einer Mitte des Rahmens vorsteht, und eine Rückgewinnungseinheit-Stützstange parallel zu dem Rahmen an einem vorstehenden Spitzenende der Hebe- und Senkstange, wobei eine zweite Befestigung, die in der Positionierungsvorrichtung vorgesehen ist, mit einem Paar konvexer Abschnitte konfiguriert ist, die auf beiden Seiten der Rückgewinnungseinheit-Stützstange in einer Längsrichtung vorgesehen sind, und eine erste Befestigung, die in der Lötpastenrückgewinnungsvorrichtung vorgesehen ist, mit einem Paar von Bohrelementen konfiguriert ist, die jeweils an dem Paar konvexer Abschnitte angebracht sind.
• [B6] Schirmdruckvorrichtung gemäß der oben beschriebenen [B5] des Weiteren umfassend: auf der Rückgewinnungseinheit-Stützstange ein Tellerfederelement, das lösbar verriegelt und in elastischem Kontakt mit dem am konvexen Abschnitt angebrachten Bohrelement steht.

The present disclosure further includes a configuration described below.

• [B1] A screen printing device that prints a solder paste on a circuit board using a screen mask, comprising: a squeegee head that slides above the screen mask to move a squeegee for printing the solder paste on the circuit board in an up-and-down direction; a positioning device which is provided adjacent to the squeezing head and which positions the screen mask; and a solder paste recovery device that recovers the solder paste on the screen mask and is provided between the crimping head and the positioning device.
• [B2] The screen printing apparatus according to [B1] described above, wherein the solder paste recovery apparatus is a first Fastener, the positioning device comprises a second fastener corresponding to the first fastener, and the solder paste recovery device is detachably attached to the positioning device using the first fastener and the second fastener.
• [B3] A screen printing device according to [B1] or [B2] described above, wherein the positioning device further comprises a frame parallel to a longitudinal direction of the crusher and cylinders from which rods protrude, the rods being lockable at both ends of the frame with the screen mask are.
• [B4] The screen printing device according to any one of [B1] to [B3] described above, wherein the crimping head comprises a connector capable of supplying power to the solder paste recovery device, and the solder paste recovery device further comprises a power cable attached to the connector and detachable therefrom, and a locking portion which can lock the power cord.
• [B5] A screen printing device according to [B3] described above, further comprising: a recovery unit raising and lowering cylinder from which a raising and lowering rod protrudes in the same direction as that of the rod at a center of the frame, and a recovery unit -Support rod parallel to the frame at a protruding tip end of the raising and lowering rod, a second attachment provided in the positioning device being configured with a pair of convex portions provided on both sides of the recovery unit support rod in a longitudinal direction, and a first fixture provided in the paste recovery device is configured with a pair of drilling members each attached to the pair of convex portions.
• [B6] The screen printing device according to [B5] described above, further comprising: on the recovery unit support rod, a plate spring member which is releasably locked and in elastic contact with the drilling member attached to the convex portion.

Although the embodiment has been described above with reference to the accompanying drawings, the present disclosure is not limited to such examples. It will be apparent to those skilled in the art that various changes, modifications, substitutions, additions, deletions and equivalents are conceivable within the scope of the claims, and it should be understood that such changes and the like also belong to the technical scope of the present disclosure. Furthermore, in the above-described embodiment, the components can be optionally combined within a range not deviating from the gist of the invention.

The present application is based on Japanese patent applications (Japanese Patent Application No. 2018-248360 , Japanese Patent Application No. 2018-248361 and Japanese Patent Application No. 2018-248362 ), filed on December 28, 2018, the contents of which are incorporated herein by reference.

INDUSTRIAL APPLICABILITY

The present disclosure is useful as a solder paste recovery device and a screen printing device that prevent the occurrence of a printing failure due to the adhesion of a solder paste.

List of reference symbols

1

Screen printing device

2

plate

13th

Screen mask

13F

first screen mask

13R

second screen mask

17th

Crush head

22nd

Moving table section

33

Clamp

42

Squeezer

71

Solder paste recovery device

73

Stop section

75

sheet

77

Transport section

91

Mask auto placement unit

95

frame

97

pole

99

cylinder

101

Recovery unit lifting and lowering cylinder

103

Raising and lowering rod

105

Recovery unit support rod

107

opposite face

111

Scraper

115

Drilling element

117

convex section

119

Disc spring element

127

Power cord

131

Locking section

135

Sorting unit

139

timer

Pst

paste

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• JP H6262750 A [0003]
• JP 2018248360 [0162]
• JP 2018248361 [0162]
• JP 2018248362 [0162]

Claims (11)

A solder paste recovery apparatus configured to recover a solder paste on a first screen mask and to deliver the recovered solder paste to a second screen mask different from the first screen mask, the solder paste recovery apparatus comprising: a stop portion configured to abut the first screen mask or the second screen mask; a sheet conveyed over the stopper portion in a first direction for recovering the solder paste or in a second direction for supplying the solder paste; and a conveying section configured to convey the sheet in the first direction or in the second direction, wherein an opposing face opposing the first face mask and the second face mask at a first angle is provided at a tip end of the stopper portion; and wherein the stop portion is inclined at a second angle that is greater than the first angle with respect to the first screen mask and the second screen mask. Solder paste recovery device according to Claim 1 , wherein the first angle is 0 degrees and the opposite surface of the first screen mask and the second screen mask is parallel to one another. Solder paste recovery device according to Claim 1 or 2 wherein the sheet is a PTFE sheet. A screen printing device configured to print a solder paste onto a circuit board via a first screen mask or a second screen mask different from the first screen mask, the screen printing device comprising: a solder paste recovery device configured to recover the solder paste on the first screen mask and supply the recovered solder paste to the second screen mask, wherein the solder paste recovery device comprises: a stop portion configured to abut the first screen mask or the second screen mask; a sheet conveyed via the stopper portion in a first direction for recovering the solder paste or in a second direction for supplying the solder paste; and a conveying section configured to convey the sheet in the first direction or the second direction, wherein an opposing face opposing the first face mask and the second face mask at a first angle is provided at a tip end of the stopper portion; and wherein the stop portion is inclined at a second angle that is greater than the first angle with respect to the first screen mask and the second screen mask. Screen printing device according to Claim 4 , wherein the first angle is 0 degrees, and the opposite surface of the first screen mask and the second screen mask is parallel to one another. Screen printing device according to Claim 4 or 5 wherein the sheet is a PTFE sheet. Screen printing device according to one of the Claims 4 until 6th , further comprising: a scraper configured to scrape off the solder paste remaining on the sheet. Screen printing device according to one of the Claims 4 until 7th , further comprising: a clamp configured to grip the plate positioned at a predetermined printing position from both sides of the plate; and a table on which the clamp is placed and configured to move the clamp in an up-and-down direction, wherein when the paste recovery device recovers or supplies the paste, the table against a lower surface of the first Mask or the second mask. Screen printing device according to one of the Claims 5 until 8th wherein, when the sheet is pressed against the opposite surface, the sheet is in contact with the first screen mask and the second screen mask in an area at least equal to or greater than that of the opposite surface. Screen printing device according to one of the Claims 4 until 9 wherein the stopper portion is moved in a direction approaching the solder paste when the sheet is transported in the first direction. Screen printing device according to one of the Claims 4 until 10 wherein the stop portion is simultaneously moved in a direction away from the solder paste as the sheet is transported in the second direction.

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