CN112810081A - Blood taking needle protective sheath core pulling mechanism and core pulling mold - Google Patents
Blood taking needle protective sheath core pulling mechanism and core pulling mold Download PDFInfo
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- CN112810081A CN112810081A CN202110153890.XA CN202110153890A CN112810081A CN 112810081 A CN112810081 A CN 112810081A CN 202110153890 A CN202110153890 A CN 202110153890A CN 112810081 A CN112810081 A CN 112810081A
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- 230000007246 mechanism Effects 0.000 title claims abstract description 118
- 239000008280 blood Substances 0.000 title claims abstract description 15
- 210000004369 blood Anatomy 0.000 title claims abstract description 15
- 230000001681 protective effect Effects 0.000 title claims abstract description 15
- 238000001746 injection moulding Methods 0.000 claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 26
- 239000004033 plastic Substances 0.000 claims abstract description 21
- 229920003023 plastic Polymers 0.000 claims abstract description 21
- 238000002347 injection Methods 0.000 claims description 35
- 239000007924 injection Substances 0.000 claims description 35
- 238000003825 pressing Methods 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 12
- 239000002826 coolant Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims 3
- 238000000465 moulding Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000009467 reduction Effects 0.000 abstract description 2
- 239000000110 cooling liquid Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
- B29C45/332—Mountings or guides therefor; Drives therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
- B29C45/332—Mountings or guides therefor; Drives therefor
- B29C2045/334—Mountings or guides therefor; Drives therefor several transversely movable mould parts driven by a single drive means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C2045/4063—Removing or ejecting moulded articles preventing damage to articles caused by the ejector
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/753—Medical equipment; Accessories therefor
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention provides a core pulling mechanism and a core pulling mold for a blood taking needle protective sleeve, which are used for pulling an injection molding core and comprise a transmission mechanism and an air cylinder, wherein the air cylinder comprises an air cylinder body and an air cylinder connecting rod, the injection molding core comprises a first fixing part and a core rod part, the first fixing part is fixedly connected with the transmission mechanism, the air cylinder connecting rod is fixedly connected with the transmission mechanism, and when the transmission mechanism is pulled by the air cylinder connecting rod to move, the transmission mechanism can drive the injection molding core to move and pull out a certain distance from a mold cavity. Adopt its mechanism, under cylinder, drive mechanism and the cooperation of the core of moulding plastics, before movable mould mechanism and cover half mechanism open, will mould plastics the core and take out certain distance for after movable mould mechanism and cover half mechanism open, the difficult fracture that takes place of the wall thickness of injection moulding article for 0.25mm department improves the yields of moulding a goods, simplifies the mould structure, reduction in production cost, improvement production efficiency.
Description
Technical Field
The invention relates to the technical field of injection molding, in particular to a core pulling mechanism of a blood taking needle protective sleeve and a core pulling mold comprising the core pulling mechanism of the blood taking needle protective sleeve.
Background
With the development of the medical industry, the demand for thin-wall medical plastic products is gradually increased, but the yield and the cost of the thin-wall medical plastic products are difficult to control all the time, the plastic products are ejected out of a movable mold core and are demolded through a push plate and a slide block in the existing mold, and the plastic products are easy to deform and break at the position of the thin wall of the plastic product with the thickness of 0.25mm in the ejection process due to the fact that the holding force of the plastic products to the movable mold core is larger, so that the plastic products are unqualified, the mold is complex in structure, the thickness and the size of the mold are larger, and the plastic products need to be injection-molded by a large-size injection molding machine, so that the production cost.
Disclosure of Invention
In order to solve the problems, the invention provides a core pulling mechanism of a blood taking needle protective sleeve and a core pulling mold comprising the mechanism.
The invention relates to a core pulling mechanism for a blood taking needle protective sleeve, which is used for pulling an injection molding core and comprises a transmission mechanism and an air cylinder, wherein the air cylinder comprises an air cylinder body and an air cylinder connecting rod, the injection molding core comprises a first fixing part and a core rod part, the first fixing part is fixedly connected with the transmission mechanism, the air cylinder connecting rod is fixedly connected with the transmission mechanism,
when the cylinder connecting rod pulls the transmission mechanism to move, the transmission mechanism can drive the injection mold core to move and draw out a certain distance from the mold cavity.
Adopt its mechanism, under cylinder, drive mechanism and the cooperation of mould core of moulding plastics for the mould core of moulding plastics is automatic to be taken certain distance out from the die cavity, because before movable mould mechanism and cover half mechanism are opened, takes certain distance out with the mould core of moulding plastics, makes after movable mould mechanism and cover half mechanism are opened, and the thin wall thickness of injection moulding article is the difficult emergence fracture of 0.25mm department, improves the yields of moulding a goods, simplifies the mould structure, reduction in production cost improves production efficiency.
Preferably, the transmission mechanism comprises a pressing block, a clamping block and a sliding block, the cylinder connecting rod is arranged below the pressing block and connected with the pressing block, the clamping block is arranged between the pressing block and the sliding block, one side of the pressing block is provided with a first inclined plane, one side of the sliding block facing the first inclined plane is provided with an inclined plane guide sliding groove, the other side of the sliding block is fixedly connected with the first fixing part, the clamping block comprises a supporting part and a clamping part, the supporting part is fixedly connected with the first inclined plane, the side edge of the clamping part is provided with a clamping lug, the clamping lug is arranged in the inclined plane guide groove and,
when the cylinder connecting rod pulls the pressing block downwards, the pressing block and the clamping block move downwards together, and the sliding block drives the injection molding core to move towards the vertical direction of the movement of the pressing block under the matching of the clamping lug and the inclined plane guide sliding groove.
Preferably, the injection molding core is internally provided with a cavity for accommodating the core tube part, the sliding block is internally provided with a cooling liquid flow channel, the cooling core tube is internally provided with a channel, the cooling liquid flow channel is communicated with the channel, the second fixing part is fixedly connected with the sliding block, and one side of the sliding block is provided with a cooling liquid feeding hole.
The cooling core pipe is arranged in the injection mold core, and cooling liquid flows into the channel from the cooling flow channel, so that the temperature of the injection mold core is reduced in the injection molding process of the injection mold core, the service life of the injection mold core is prolonged, and the injection molding cycle can be shortened to a certain extent.
Preferably, the transmission mechanism is provided with at least one injection mold core at intervals.
A plurality of injection molding cores are arranged on the transmission mechanism at intervals, so that the production efficiency can be effectively improved.
Preferably, still include the fixed block, the fixed block setting is kept away from fixture block one side at the slider and with slider fixed connection, first fixed part pass the fixed block and with fixed block fixed connection.
And the injection mold core and the cooling core pipe are respectively fixed in the fixing block and the sliding block, so that the processing cost is reduced.
In a second aspect, the invention also provides a core pulling mold comprising the core pulling mechanism for the blood taking needle protective sleeve, and further comprises a movable mold mechanism and a fixed mold mechanism, wherein the fixed mold mechanism comprises a fixed mold fixing plate and a fixed mold cavity, the fixed mold cavity is fixedly connected with the fixed mold fixing plate, the movable mold mechanism comprises a push plate, a movable mold cavity, an ejection mechanism and a movable mold fixing plate, the movable mold cavity is fixedly connected with the movable mold plate, the fixed mold mechanism is arranged right above the movable mold mechanism and is sleeved with the movable mold mechanism, the movable mold cavity is in contact connection with the fixed mold cavity, a core rod part of an injection mold core is arranged between the movable mold cavity and the fixed mold cavity, the movable mold plate is provided with a push plate mounting groove, the push plate is arranged in the push plate mounting groove and is sleeved with the movable mold plate, the ejection mechanism is arranged below the movable mold plate, the, the core-pulling mechanism penetrates into the mounting hole, a transmission mechanism of the core-pulling mechanism is arranged in the push plate, and an air cylinder of the core-pulling mechanism is arranged in the ejection mechanism.
Preferably, the ejection mechanism comprises an ejector pin, a first ejector pin plate, an ejector pin supporting plate, a second ejector pin plate, an ejector pin, a height-equal screw and a push rod, the first ejector pin plate and the ejector pin supporting plate are provided with cylinder through holes, the second ejector pin plate is provided with a groove, a cylinder penetrates through the cylinder through holes in the first ejector pin plate and the ejector pin supporting plate and is arranged in the groove, ejector pin channels are respectively arranged in the movable template and the movable model cavity, one end of the ejector pin is arranged in the first ejector pin plate, the other end of the ejector pin is arranged in the ejector pin channels in the movable template and the movable model cavity, the ejector pin supporting plate is fixedly connected with the first ejector pin plate, the second ejector pin plate is provided with an ejector pin through hole, the ejector pin penetrates through holes in the second ejector pin plate and is fixedly connected with the ejector pin supporting plate, the movable template, the first ejector pin plate and the ejector, The push rod through holes on the first thimble plate and the thimble supporting plate are fixedly connected with the push plate, the equal-height screws comprise a connecting part and an abutting part, the thimble supporting plate and the second thimble plate are respectively provided with a connecting through hole, the connecting part passes through the connecting through holes on the thimble supporting plate and the second thimble plate and is fixedly connected with the first thimble plate,
when first thimble board rebound extreme distance, the butt portion and the second thimble board butt of equal altitude screw, when first thimble board continues rebound, butt portion drives second thimble board rebound.
Preferably, the core-pulling mechanisms are arranged in two groups, and the two groups of core-pulling mechanisms are arranged in the push plate side by side.
Preferably, the injection molding mold further comprises a guide block, the guide block is arranged at one end, facing the movable mold cavity and the fixed mold cavity, of the push plate and is fixedly connected with the push plate, a second guide sliding groove matched with the injection molding core is formed in the guide block, and the core rod part penetrates through the sliding groove and is arranged between the movable mold cavity and the fixed mold cavity.
Preferably, a compressed air inlet channel is arranged in the push plate, a compressed air inlet pipe communicated with the compressed air inlet channel is arranged in the guide block, and the compressed air inlet pipe is communicated with the second guide sliding groove.
The core pulling die is provided with the core pulling mechanism for the blood taking needle protective sleeve, and the mechanism refers to the description. And because the core-pulling die comprises the mechanism, the technical effect produced by the mechanism can be produced, and the invention is not described herein again with reference to the above description.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the whole structure of an embodiment 1 of the core pulling mechanism of the blood taking needle protecting sleeve of the present invention;
FIG. 2 is an exploded view of the embodiment 1 of the present invention;
FIG. 3 is a schematic structural view of the core pulling mold of the present invention;
FIG. 4 is a cross-sectional view of the core back mold of FIG. 3 taken along the line A-A;
FIG. 5 is a partially enlarged view of FIG. 4;
FIG. 6 is a schematic structural view of a movable mold mechanism of the core pulling mold of the present invention;
FIG. 7 is a schematic structural diagram of a fixed mold mechanism of the core pulling mold of the invention;
FIG. 8 is a cross-sectional view of the core back mold of FIG. 3 taken along the direction B-B;
FIG. 9 is a cross-sectional view of the core back mold of FIG. 3 in a direction C-C;
FIG. 10 is a schematic structural view of the core pulling mold during core pulling;
FIG. 11 is a partial cross-sectional view of the core back mold of FIG. 3 in a direction D-D;
reference numerals: 1. a core-pulling mechanism; 11. a transmission mechanism; 12. injection molding a mold core; 13. a cylinder; 131. a cylinder body; 132. a cylinder connecting rod; 121. a first fixed part; 122. a core rod portion; 111. briquetting; 112. a clamping block; 113. a slider; 1111. a first inclined plane; 1131. a bevel guide groove; 1121. a support portion; 1122. a clamping part; 11221. clamping the lug; 14. cooling the core pipe; 141. a second fixed part; 142. a core pipe portion; 123. a cavity; 143. a channel; 1132. a coolant feed port; 15. a fixed block; 2. a moving die mechanism; 3. a die fixing mechanism; 31. fixing a die fixing plate; 32. a die cavity is fixed; 33. a pouring gate insert; 34. injection molding a runner; 331. a submarine gate; 21. pushing the plate; 22. moving the template; 23. a movable model cavity; 24. a movable mold fixing plate; 221. a push plate mounting groove; 211. mounting holes; 25. a thimble; 26. a first ejector plate; 27. a thimble supporting plate; 28. a second ejector plate; 29. a top rod; 291. an equal-height screw; 292. a push rod; 261. a cylinder through hole; 281. a groove; 222. a thimble passage; 282. a through hole of the mandril; 223. a push rod through hole; 2911. a connecting portion; 2912. an abutting portion; 271. a connecting through hole; 293. a guide block; 2931. a second guide chute; 212. a compressed air intake passage; 2932. a compressed air inlet pipe; 4. and (5) molding the product.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, 2 and 4, embodiment 1 is a core pulling mechanism for a lancet protection sleeve, the core pulling mechanism 1 is used for pulling an injection core 12, and comprises a transmission mechanism 11, a fixed block 15, a cooling core tube 14 and a cylinder 13, the cylinder 13 comprises a cylinder body 131 and a cylinder connecting rod 132, the injection core 12 comprises a first fixed portion 121 and a core rod portion 122, the cooling core tube 14 comprises a second fixed portion 141 and a core tube portion 142, and a cavity 123 for accommodating the core tube portion 142 is arranged in the injection core 12.
The transmission mechanism 11 includes a pressing block 111, a clamping block 112 and a sliding block 113, the air cylinder connecting rod 132 is disposed below the pressing block 111 and connected to the pressing block 111, the clamping block 112 is disposed between the pressing block 111 and the sliding block 113, one side of the pressing block 111 is provided with a first inclined plane 1111, one side of the sliding block 113 facing the first inclined plane 1111 is provided with an inclined plane guide sliding groove 1131, the other side of the sliding block 113 is provided with a fixing block 15 and the sliding block 113 is fixedly connected to the fixing block 15, the clamping block 112 includes a supporting portion 1121 and a clamping portion 1122, the supporting portion 1121 is fixedly connected to the first inclined plane 1111, a side of the clamping portion 1122 is provided with a clamping lug 11221, and the clamping lug 11221 is disposed in.
A cooling liquid flow channel is arranged in the sliding block 113, a channel 143 is arranged in the cooling core tube 14, the cooling liquid flow channel is communicated with the channel 143, a cooling liquid feed opening 1132 is arranged on one side of the sliding block 113, a mounting hole of the injection molding core 15 is arranged on the fixed block 15, the first fixing part 121 is fixedly connected with the fixed block 15 through the mounting hole, the second fixing part 141 is fixedly connected with the sliding block 113, the core tube part 142 is arranged in the cavity 123 of the injection molding core rod 12, cooling liquid enters the cooling liquid flow channel and the channel 143 from the cooling liquid feed opening 1132, and the injection molding core 12 is cooled.
4 injection cores 12 are arranged on the fixed block 15 at intervals, 4 cooling core pipes 14 are also arranged, when the cylinder connecting rod 132 pulls the pressing block 111 downwards, the pressing block 111 and the clamping block 112 move downwards together, and under the matching of the clamping lugs 11221 and the inclined guide sliding grooves 1131, the sliding block 113 drives the injection cores 12 to move towards the vertical direction of the movement of the pressing block 111, so that the injection cores 12 are drawn out from the injection products 4 for a certain distance, and the injection products 4 are not easy to break at the position of 0.25mm after the movable mold mechanism 2 and the fixed mold mechanism 3 of the core pulling mold are opened.
As shown in fig. 3 to 11, the present invention further provides an embodiment of a core pulling mold, the core pulling mold includes a moving mold mechanism 2 and a fixed mold mechanism 3, the fixed mold mechanism 3 includes a fixed mold fixing plate 31 and a fixed mold cavity 32, the fixed mold cavity 32 is fixedly connected to the fixed mold fixing plate 31, the moving mold mechanism 2 includes two sets of core pulling mechanisms 1, a push plate 21, a guide block 293, a moving mold plate 22, a moving mold cavity 23, an ejection mechanism and a moving mold fixing plate 24, the moving mold cavity 23 is fixedly connected to the moving mold plate 24, the fixed mold mechanism 3 is disposed right above the moving mold mechanism 2 and is sleeved to the moving mold mechanism 2, the moving mold cavity 23 is in contact connection with the fixed mold cavity 32 to form an injection mold cavity, and a core rod portion 122 of the injection mold core 12 is disposed between.
The fixed mold cavity 32 and the movable mold cavity 23 both comprise an injection molding runner 34 and a product cavity, a gate insert 33 is arranged in the product cavity, a submarine gate 331 is arranged on one side of the gate insert 33, and the injection molding runner 34 is communicated with the product cavity through the submarine gate 331.
The core pulling mechanism comprises a movable template 22 and a movable template, wherein a push plate mounting groove 221 is formed in the movable template 22, a push plate 21 is arranged in the push plate mounting groove 221 and is sleeved with the movable template 22, an ejection mechanism is arranged below the movable template 22, a movable mold fixing plate 24 is arranged below the ejection mechanism, mounting holes 211 for two groups of core pulling mechanisms 1 to penetrate into are formed in the push plate 21 and the movable template 22, the two groups of core pulling mechanisms 1 are arranged side by side, the two groups of core pulling mechanisms 1 penetrate into the mounting holes 211 respectively, transmission mechanisms 11 of the two groups of core pulling mechanisms 1 are arranged in the push plate 21, and a cylinder 13 of the core pulling mechanism 1.
The ejection mechanism comprises an ejector 25, a first ejector plate 26, an ejector supporting plate 27, a second ejector plate 28, an ejector rod 29, an equal-height screw 291 and a push rod 292, wherein the first ejector plate 26 and the ejector supporting plate 27 are provided with cylinder through holes 261, the second ejector plate 28 is provided with a groove 281, the cylinder 13 passes through the cylinder through holes 261 on the first ejector plate 26 and the ejector supporting plate 27 and is arranged in the groove 281, the movable mould plate 22 and the movable mould cavity 23 are respectively provided with an ejector pin channel 222, one end of an ejector pin 25 is arranged in the first ejector plate 26, the other end of the thimble 25 is disposed in a thimble passage 222 in the moving die plate 22 and the moving die cavity 23, the thimble channel 222 is communicated with the injection runner 34, the thimble supporting plate 27 is fixedly connected with the first thimble plate 26, ejector rod through holes 282 are respectively arranged on the movable mold fixing plate 24 and the second thimble plate 28, one end of the ejector rod 29 is arranged in the ejector rod through hole 282 on the movable mold fixing plate 24, the other end of the ejector rod 29 passes through an ejector rod through hole 282 in the second ejector plate 28 and is fixedly connected with the ejector pin supporting plate 27.
The movable template 22, the first ejector plate 26 and the ejector retainer 27 are respectively provided with a push rod through hole 223, one end of the push rod 292 is fixedly connected with the second ejector plate 28, the other end of the push rod 292 penetrates through the push rod through holes 223 on the movable template 22, the first ejector plate 26 and the ejector supporting plate 27 to be fixedly connected with the push plate 21, the equal-height screw 291 comprises a connecting part 2911 and an abutting part 2912, the ejector supporting plate 27 and the second ejector plate 28 are respectively provided with a connecting through hole 271, the connecting part 2911 penetrates through the connecting through holes 271 on the ejector supporting plate 27 and the second ejector plate 28 to be fixedly connected with the first ejector plate 26,
when the first ejector plate 26 moves upward by a limited distance, the abutting portion 2912 of the equal-height screw 291 abuts against the second ejector plate 28, and when the first ejector plate 26 continues to move upward, the abutting portion 2912 drives the second ejector plate 28 to move upward.
The guide block 293 is arranged at one end of the push plate 21 facing the movable mold cavity 23 and the fixed mold cavity 32 and is fixedly connected with the push plate 21, a second guide sliding groove 2931 matched with the injection mold core 12 is arranged in the guide block 293, the core rod part 122 penetrates through the second guide sliding groove 2931 and is arranged between the movable mold cavity 23 and the fixed mold cavity 32, a compressed air inlet channel 212 is arranged in the push plate 21, a compressed air inlet pipe 2932 communicated with the compressed air inlet channel 212 is arranged in the guide block 293, the compressed air inlet pipe 2932 is communicated with the second guide sliding groove 2931, and compressed air is introduced to separate the plastic part product 4 on the injection mold core 12 from the injection mold core 12.
The working principle of the loose core mould of the loose core mechanism of the blood taking needle protective sleeve is as follows: after the mold finishes injection molding, before the movable mold mechanism 2 and the fixed mold mechanism 3 are opened, a first-stage core pulling step is started, fig. 5 is a schematic diagram of a partially enlarged structure of fig. 4 when the core pulling mold performs the first-stage core pulling step, the air cylinder 13 works first, the air cylinder connecting rod 132 drives the press block 111 to move downwards for a distance of S1, the press block 111 drives the fixture block 112 to move together, and under the matching effect of the fixture block 112 and the inclined guide groove 1131, the slider 113 drives the injection mold core 12 to move towards the vertical direction of the movement of the press block 111, so that the injection mold core 12 is pulled out from the injection molding product 4 for a distance of S2 without being completely separated.
After the injection core 12 is pulled out of the injection product 4 by the distance of S2, the fixed mold mechanism 3 and the movable mold mechanism 2 are opened, the movable mold mechanism 2 moves downward, and the plastic product 4 is separated from the fixed mold cavity 3.
Next, the first-stage ejection step is started, and fig. 8 is a cross-sectional view of the core back mold during the first-stage core back step, in which a plunger on the injection molding machine pushes a plunger 29 on the core back mold to move S3 distance, and the plunger 29 moves upward S3 distance together with the cooperation of the first ejector plate 26, the ejector retainer plate 27 and the ejector 25, so that the ejector 25 penetrates out of the ejector channel 222, and ejects the waste in the injection runner 34 out of the movable mold cavity 23, during which process, the second ejector retainer plate 28 remains stationary, and the plastic part product 4 remains in the movable mold cavity 23.
After the ejector rod 29 is ejected upwards by the distance of S3, the abutting portion 2912 of the equal-height screw 291 abuts against the second ejector plate 28, and then the second-stage ejection step is started, fig. 9 is a cross-sectional view of the core-pulling mold during the second-stage ejection step, the ejector rod 29 continues to eject upwards, the equal-height screw 291 drives the second ejector plate 28 to move upwards by the distance of S4, because one end of the push rod 292 is fixedly connected with the second ejector plate 28, the other end of the push rod 292 is fixedly connected with the push plate 21, and the air cylinder 13 is arranged on the second ejector plate 28, the core-pulling mechanism 1 moves upwards by the distance of S4 together, and the injection mold core 12 drives the plastic product 4 to eject the movable mold cavity.
Since the plastic product 4 is still located at the injection core 12 and completely separated, fig. 11 is a partial cross-sectional view of the core-pulling mold after the second-stage ejection step, and then the second-stage core-pulling step is started, and fig. 10 is a cross-sectional view of the core-pulling mold after the second-stage core-pulling step is performed, at this moment, compressed air is injected from the compressed air inlet channel 212 in the push plate 21, and then enters the second guide chute 2931 from the compressed air inlet pipe 2932 and is blown out, so that the plastic product 4 is separated from the injection core 12, and finally core-pulling is completed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides a blood taking needle protective sheath mechanism of loosing core which characterized in that: the core-pulling mechanism is used for pulling the injection mold core and comprises a transmission mechanism and an air cylinder, the air cylinder comprises an air cylinder body and an air cylinder connecting rod, the injection mold core comprises a first fixing part and a core rod part, the first fixing part is fixedly connected with the transmission mechanism, the air cylinder connecting rod is fixedly connected with the transmission mechanism,
when the cylinder connecting rod pulls the transmission mechanism to move, the transmission mechanism can drive the injection mold core to move and draw out a certain distance from the mold cavity.
2. A blood lancet protective sheath core pulling mechanism according to claim 1, wherein: the transmission mechanism comprises a pressing block, a clamping block and a sliding block, the air cylinder connecting rod is arranged below the pressing block and connected with the pressing block, the clamping block is arranged between the pressing block and the sliding block, a first inclined plane is arranged on one side of the pressing block, an inclined plane guide sliding groove is arranged on one side of the sliding block facing the first inclined plane, the other side of the sliding block is fixedly connected with the first fixing part, the clamping block comprises a supporting part and a clamping part, the supporting part is fixedly connected with the first inclined plane, a clamping lug is arranged on the side edge of the clamping part, the clamping lug is arranged in the inclined plane guide groove and is in sliding connection with the inclined plane guide groove,
when the cylinder connecting rod pulls the pressing block downwards, the pressing block and the clamping block move downwards together, and the sliding block drives the injection molding core to move towards the vertical direction of movement of the pressing block under the matching of the clamping lug and the inclined plane guide sliding groove.
3. A blood lancet protective sheath core pulling mechanism according to claim 2, wherein: still include the cooling core pipe, the cooling core pipe includes second fixed part and core pipe portion, be provided with in the mould plastics core and hold the cavity of core pipe portion, be provided with the coolant liquid runner in the slider, be provided with the passageway in the cooling core pipe, the coolant liquid runner with the passageway intercommunication, the second fixed part with slider fixed connection, slider one side is provided with the coolant liquid feed inlet.
4. A blood lancet protective sheath core pulling mechanism according to claim 3, wherein: the transmission mechanism is provided with at least one injection mold core at intervals.
5. A lancet protection cover core-pulling structure according to claim 4, wherein: still include the fixed block, the fixed block sets up the slider is kept away from fixture block one side and with slider fixed connection, first fixed part pass the fixed block and with fixed block fixed connection.
6. A loose core mould comprising a mechanism for pulling the core of a protective sheath for lancets according to any one of claims 1 to 5, characterized in that: the core bar part of the injection mold core is arranged between the movable mold cavity and the fixed mold cavity, the movable mold plate is provided with a push plate mounting groove, the push plate is arranged in the push plate mounting groove and is sleeved with the movable mold plate, the ejection mechanism is arranged below the movable mold plate, the movable mold fixing plate is arranged below the ejection mechanism, the push plate and the movable mold plate are provided with mounting holes for the core-pulling mechanism to penetrate through, the core pulling mechanism penetrates into the mounting hole, a transmission mechanism of the core pulling mechanism is arranged in the push plate, and an air cylinder of the core pulling mechanism is arranged in the ejection mechanism.
7. The core back mold of claim 6, wherein: the ejector mechanism comprises an ejector pin, a first ejector pin plate, an ejector pin supporting plate, a second ejector pin plate, an ejector pin, a contour screw and a push rod, wherein the first ejector pin plate and the ejector pin supporting plate are provided with cylinder through holes, the second ejector pin plate is provided with a groove, the cylinder penetrates through the cylinder through holes on the first ejector pin plate and the ejector pin supporting plate and is arranged in the groove, ejector pin channels are respectively arranged in the movable template and the movable model cavity, one end of the ejector pin is arranged in the first ejector pin plate, the other end of the ejector pin is arranged in the ejector pin channels in the movable template and the movable model cavity, the ejector pin supporting plate is fixedly connected with the first ejector pin plate, the second ejector pin plate is provided with an ejector pin through hole, the ejector pin penetrates through hole on the second ejector pin plate and is fixedly connected with the ejector pin supporting plate, and the movable template, the first ejector pin plate and the ejector pin, one end of the push rod is fixedly connected with the second thimble plate, the other end of the push rod penetrates through push rod through holes on the movable template, the first thimble plate and the thimble supporting plate to be fixedly connected with the push plate, the equal-height screw comprises a connecting part and an abutting part, the thimble supporting plate and the second thimble plate are respectively provided with a connecting through hole, the connecting part penetrates through the connecting through holes on the thimble supporting plate and the second thimble plate to be fixedly connected with the first thimble plate,
when the first ejector plate moves upwards for a limited distance, the abutting part of the equal-height screw abuts against the second ejector plate, and when the first ejector plate continues to move upwards, the abutting part drives the second ejector plate to move upwards.
8. The core back mold of claim 6, wherein: the core-pulling mechanisms are arranged in two groups, and the two groups of core-pulling mechanisms are arranged in the push plate side by side.
9. The core back mold of claim 6, wherein: still include the guide block, the guide block sets up the push pedal towards movable mould cavity and cover half die cavity one end and with push pedal fixed connection, be provided with in the guide block with mould plastics core matched with second direction spout, core bar portion passes the spout and sets up between movable mould cavity and the cover half die cavity.
10. The core back mold of claim 9, wherein: a compressed air inlet channel is arranged in the push plate, a compressed air inlet pipe communicated with the compressed air inlet channel is arranged in the guide block, and the compressed air inlet pipe is communicated with the second guide sliding groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110153890.XA CN112810081A (en) | 2021-02-04 | 2021-02-04 | Blood taking needle protective sheath core pulling mechanism and core pulling mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110153890.XA CN112810081A (en) | 2021-02-04 | 2021-02-04 | Blood taking needle protective sheath core pulling mechanism and core pulling mold |
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| Publication Number | Publication Date |
|---|---|
| CN112810081A true CN112810081A (en) | 2021-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110153890.XA Pending CN112810081A (en) | 2021-02-04 | 2021-02-04 | Blood taking needle protective sheath core pulling mechanism and core pulling mold |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114953365A (en) * | 2022-07-29 | 2022-08-30 | 赫比(成都)精密塑胶制品有限公司 | Mold structure |
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| CN104772874A (en) * | 2015-05-01 | 2015-07-15 | 陈伟娅 | Injection molding air cylinder and floating ejection oil cylinder combined side ejection mechanism |
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Address after: 518000 No. 101, 17 and 15, building 1, No. 17, East Xinfa Road, Xinqiao community, Baoan District, Shenzhen City, Guangdong Province Applicant after: Senjun precision manufacturing (Shenzhen) Co.,Ltd. Address before: 518000 No. 101, 17 and 15, building 1, No. 17, East Xinfa Road, Xinqiao community, Baoan District, Shenzhen City, Guangdong Province Applicant before: SENJUN EXCELLENT PREC MOLD SHENZHEN Co.,Ltd. |