CN110561673A - automatic production system and method for colored contact lenses - Google Patents
automatic production system and method for colored contact lenses Download PDFInfo
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- CN110561673A CN110561673A CN201910915882.7A CN201910915882A CN110561673A CN 110561673 A CN110561673 A CN 110561673A CN 201910915882 A CN201910915882 A CN 201910915882A CN 110561673 A CN110561673 A CN 110561673A
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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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
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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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/04—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds
- B29C43/06—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds continuously movable in one direction, e.g. mounted on chains, belts
- B29C43/08—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds continuously movable in one direction, e.g. mounted on chains, belts with circular movement, e.g. mounted on rolls, turntables
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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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
- B41F17/001—Pad printing apparatus or machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
- B41F19/08—Simultaneous moulding and printing
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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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
- B29C2043/3676—Moulds for making articles of definite length, i.e. discrete articles moulds mounted on rotating supporting constuctions
- B29C2043/3689—Moulds for making articles of definite length, i.e. discrete articles moulds mounted on rotating supporting constuctions on a support table, e.g. flat disk-like tables having moulds on the periphery
- B29C2043/3692—Moulds for making articles of definite length, i.e. discrete articles moulds mounted on rotating supporting constuctions on a support table, e.g. flat disk-like tables having moulds on the periphery cooperating with non rotating parts
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- 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
- B29L2011/00—Optical elements, e.g. lenses, prisms
- B29L2011/0016—Lenses
- B29L2011/0041—Contact lenses
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
the invention relates to the field of production and manufacturing of contact lenses, in particular to an automatic production system and method of colored contact lenses. The automatic production system of colored contact lenses comprises: the upper die and the lower die are nested together, and a gap between the upper die and the lower die is filled with liquid molding raw materials and is solidified to form the contact lens; further comprising: the device comprises a pad printing device, a lower die moving and feeding tray, an upper die moving and feeding tray, a drying transition device, a liquid injection pressing device and a drying device; compared with the prior art, the invention has the advantages that: the contact lens production device is reasonable and compact in layout, can effectively save space, and is suitable for an automatic production line.
Description
the technical field is as follows:
The invention relates to the field of production and manufacturing of contact lenses, in particular to an automatic production system and method of colored contact lenses.
background art:
Contact lenses belong to the medical equipment industry, and their main functions are the same as traditional glasses for vision correction, include: myopia, hyperopia, astigmatism, aberrations, and the like. In view of the development of appearance color, the contact lenses are developed from early transparent sheets to later water sheets, so that the contact lenses are convenient for a wearer to pick up and take from a care solution, and in recent years, products such as colored contact lenses and cosmetic pupils are further developed due to the requirements of cosmetics and aesthetic functions.
With the continuous innovation of colored contact lens materials and patterns, the production process flow of the colored contact lens is greatly developed, and the later injection molding (compression molding) process and the later rotary molding (centrifugal molding) process are developed from the initial traditional turning process. The turning process is used as a traditional method for manufacturing contact lens, the lens manufactured by the method is not easy to damage, the manufactured diopter range is wide, but the method needs too high cost of lens materials and causes more waste, the method needs higher labor cost, the comfort degree of the produced lens is not high, and the lens can only be sold as a low-end product. The current trend in large contact lens manufacturers is to produce high-end, disposable contact lens designs using injection molding processes.
the injection molding process has high automation degree, can greatly reduce the labor cost, and can reduce the waste of lens materials to a certain degree, but the process has higher requirements on required equipment, and the automation of lens production cannot be realized without advanced equipment. Under the circumstances, it is necessary to provide a device capable of satisfying the full-automatic production of the colored contact lens, thereby ensuring the automatic production line production of the lens.
the invention content is as follows:
the invention aims to provide a full-automatic color contact lens production system and method, aiming at ensuring the automatic flow line production of lenses. The specific technical scheme is as follows:
the automatic production system of colored contact lenses comprises: the contact lens comprises an upper die 1 and a lower die 2 which are nested together, wherein a gap between the upper die and the lower die is filled with a liquid forming raw material and is solidified to form the contact lens; the lower die comprises: a lower die inner concave spherical surface working part 21, a lower die outer convex spherical surface shell 22 and a lower die upper outer edge 23; the upper die comprises three parts: an upper die inner concave spherical surface 11, an upper die outer convex spherical surface working part 12 and an upper die upper outer edge 13; further comprising:
the transfer printing device, the lower die moving and feeding tray 9, the upper die moving and feeding tray 90, the drying transition device 32, the liquid injection pressing device and the drying device 34;
The pad printing apparatus includes: at least 1 pad printer 31a, a steel plate 4 engraved with patterns on the pad printer, a turntable a5, and 6 lower die clamping seats 61, 62, 63, 64, 65 and 66 uniformly positioned on the outer edge of the turntable a; 4 lower die grooves 71, 72, 73 and 74 are uniformly distributed on each lower die clamping seat, the pad printing machine corresponding to the 4 lower die grooves is provided with 4 pad printing rubber heads 8, the pad printing rubber heads can move up and down, left and right, and the 4 pad printing rubber heads correspond to the 4 lower die grooves in position relation; the transfer printing rubber head transfers and prints the color patterns to the inner surface of the lower die from the steel plate engraved with the patterns;
the lower die moving and feeding plate is uniformly distributed with 8 lower die grooves 91, 92, 93, 94, 95, 96, 97 and 98, and each lower die groove can be used for placing 1 lower die; 8 lower dies in the lower die moving and feeding disc are transferred to the clamping seat 61 of the transfer printing device turntable a by the mechanical arm C35 twice;
the upper mold moving and conveying plate is uniformly distributed with 8 upper mold grooves 901, 902, 903, 904, 905, 906, 907 and 908, and each upper mold groove can be used for placing 1 upper mold;
the drying transition device dries the lower die printed with patterns to ensure that the pigment is quick to dry;
Annotate liquid compression fittings includes: a turntable b, 8 lower mold clamping seats uniformly positioned at the outer edge of the turntable b, a first lower mold clamping seat, a second lower mold clamping seat, a third lower mold clamping seat, a fourth lower mold clamping seat, a fifth lower mold clamping seat, a sixth lower mold clamping seat, a seventh lower mold clamping seat and an eighth lower mold clamping seat in sequence, wherein the corresponding stations are a first lower mold clamping seat station 101, a second lower mold clamping seat station 102, a third lower mold clamping seat station 103, a fourth lower mold clamping seat station 104, a fifth lower mold clamping seat station 105, a sixth lower mold clamping seat station 106, a seventh lower mold clamping seat station 107 and an eighth lower mold clamping seat station 108 in sequence, 4 lower mold grooves are uniformly distributed on each lower mold clamping seat, an injection loading device 38 positioned above the first lower mold clamping seat station, a pressing device 33 positioned above the third lower mold clamping seat station, an injection device 36 positioned above the fourth lower mold clamping seat station, and a pressing device 37 positioned above the fifth lower mold clamping seat, a clamping device 39 located above the seventh lower mold clamping seat station; there are 4 vacuum chuck on the compression fittings, adsorb 4 and go up the mould, the pressfitting process:
The lower die from the drying transition device is transferred to a first lower die clamping seat station of the turntable b by the liquid injection feeding device, the turntable b starts to rotate, when the lower die rotates to the position of a third lower die clamping seat station along with the turntable b, the turntable b stops rotating, and the pressing device 33 positioned right above the third lower die clamping seat station presses the set of lower dies at the moment, so that the set of lower dies can be stably placed on the lower die groove; the turntable b continues to rotate, when the lower die rotates to the position of the fourth lower die clamping seat station along with the turntable b, the turntable b stops rotating, and at the moment, required amount of liquid lens material is injected into the lower die through 4 liquid injection heads on the liquid injection device 36 positioned right above the fourth lower die clamping seat station; the turntable b continues to rotate, when the lower die after liquid injection is finished rotates to the position of the station of the fifth lower die clamping seat along with the turntable b, the turntable b stops rotating, at the moment, 4 vacuum suction cups 19 on a pressing device 37 positioned right above the fifth lower die clamping seat adsorb 4 upper dies and move to the position right above the third lower die clamping seat, and the upper dies are pressed into the lower dies after liquid injection is finished, so that the upper dies and the lower dies are pressed together, and a die assembly is obtained; the turntable b continues to rotate, when the pressed die assembly rotates to the position of the seventh lower die clamping seat station along with the turntable b, the turntable b stops rotating, and the die clamping device 39 positioned right above the seventh lower die clamping seat station transfers the die assembly to the drying device 34 for drying and forming;
the drying device comprises an oven tunnel, and a conveyor belt is arranged in the oven tunnel.
The automatic production method of the colored contact lenses, which is realized on the automatic production system, wherein the turntable a rotates clockwise, and the turntable b rotates anticlockwise, comprises the following processes:
Step 1: 8 lower dies in the lower die moving and feeding disc are transferred to the clamping seat 61 of the transfer printing device turntable a by the mechanical arm C35 twice;
step 2: the turntable a starts to rotate intermittently, and rotates for a certain angle every time the turntable a rotates once; at the moment, the lower die comes below the pad printing machine, and the pad printing rubber head pad prints the color patterns on the inner surface of the lower die from the steel plate engraved with the patterns;
And step 3: the turntable a continues to start to rotate intermittently, at the moment, the lower die comes to a discharging position and enters the drying transition device through the disc moving mechanism 40;
and 4, step 4: after the lower die comes out of the drying transition device, the lower die is transferred into a first lower die clamping seat station 101 of a liquid injection pressing device turntable b through a lower die feeding device 38;
And 5: starting intermittent rotation of the turntable b, and rotating for 45 degrees once; when the lower die reaches the third lower die clamping seat station 103, the pressing device 33 right above presses the set of lower dies, so that the set of lower dies can be stably placed on the lower die groove;
step 6: the turntable b continues to rotate, and when the lower die rotates to the position of the fourth lower die clamping seat station along with the turntable b, the required amount of liquid lens material is injected into the lower die through 4 liquid injection heads on the liquid injection device 36 positioned right above the fourth lower die clamping seat station;
and 7: the turntable b continues to rotate, when the lower die rotates to the position of the fifth lower die clamping seat station along with the turntable b, 4 vacuum suction cups 19 on the pressing device 37 right above adsorb 4 upper dies and move to the position right above the third lower die clamping seat, and the upper dies are pressed into the lower dies with injection completed, so that the pressing of the upper dies and the lower dies is completed, and the die assembly is obtained;
And 8: the turntable b continues to rotate, and when the pressed die assembly rotates to the position where the seventh lower die clamping seat station is located along with the turntable b, the die clamping device 39 located right above the seventh lower die clamping seat station transfers the die assembly to the drying device 34 for drying and forming;
and demolding the dried mold assembly to obtain the colored contact lens.
preferably, the pad printing machine further comprises a static electricity removing device 12, the static electricity removing device fixes the transparent electrostatic film on two rotating shafts 121 and 122, the rotating shafts are fixed on supports 123 and 124, the supports are fixed on a first metal plate 125 through bolts, a motor is arranged behind one rotating shaft, the rotating shaft is controlled by the motor to drive the transparent electrostatic film to rotate, the rotating speed is matched with the pad printing speed, and therefore the electrostatic film can be fully utilized, a cushion block 126 and a second metal plate 127 are arranged between the two rotating shafts, the cushion block is arranged on the first metal plate, the second metal plate is arranged on the cushion block, and the transparent electrostatic film 128 is spread on the second metal plate; when the transfer printing rubber head prints patterns on the inner surface of the lower die, the rubber head can be printed on the static removing film, the static electricity on the rubber head can be removed under the action of the rubber head, the residual pigment on the rubber head can be cleaned, finally, impurities can be reduced, and chromatic aberration can be reduced, so that the consistency of the colors of the patterns is ensured.
further preferred scheme still includes: a lower die mold adsorption device 15 and an upper die mold adsorption device 16;
the lower die adsorption device comprises 8 independent adsorption heads, and 8 lower dies of which the adsorption heads are in a group are conveyed to a lower die moving and feeding disc;
and the upper die adsorption device adsorption head conveys 8 upper dies in a group to the upper die moving and feeding disc.
still further preferred embodiment, further comprising: a lower die shearing device and an upper die shearing device;
before the lower die enters a lower die moving and conveying die plate, every 8 lower dies are connected together in a group to form a regular octagon; the lower die shearing device cuts a group of 8 lower dies to form a single lower die; the adsorption head of the lower die adsorption device conveys 8 lower dies in a group to a lower die moving and feeding disc;
before the upper dies enter the movable die conveying disc, every 8 upper dies are connected together in a group to form a regular octagon; the upper die shearing device cuts the 8 upper dies in one group to form a single upper die; and the upper die adsorption device adsorption head conveys 8 upper dies in a group to the upper die moving and feeding disc.
still further, the lower die shearing apparatus includes: a lower die mould shearing disc 17, a lifting platform a41 and a lower die lifting platform upright rod 42; go up mould shearing mechanism includes: an upper die shearing disc 18, a lifting platform b43, an upper die lifting platform upright 44;
the working process of the lower die shearing device is as follows: placing a group of 8 connected lower dies on a lifting platform a, then descending the lifting platform a, placing a group of 8 connected lower dies on 8 lower die bases, then descending a lower die cutting plate, and removing a support connected with the 8 lower dies to obtain 8 independent lower dies; then the lower die adsorption device conveys 8 lower dies in a group to a lower die moving and feeding plate;
the working process of the upper die shearing device is as follows: placing a group of 8 upper dies connected together on a lifting platform b, then descending the lifting platform b, placing a group of 8 upper dies connected together on 8 upper die bases, then descending an upper die cutting disc, and removing a support connected with the 8 upper dies to obtain 8 independent upper dies; then the upper die adsorption device conveys the 8 upper dies in a group to an upper die moving and feeding plate.
the lower surface of the lower die cutting plate is provided with 9 round holes, wherein 8 round holes are uniformly distributed to form a circle and just correspond to 8 lower die bases, and telescopic thimbles are arranged in the round holes and are used for fixing the lower die on the lower die bases in the process of removing the support; the center of the circle is provided with a round hole, and a telescopic thimble is arranged in the round hole and used for removing a bracket connected with the lower die;
the lower surface of the upper die cutting disc is provided with 9 round holes, wherein 8 round holes are uniformly distributed to form a circle and just correspond to 8 upper die bases, and telescopic thimbles are arranged in the round holes and are used for fixing the upper die on the upper die bases in the process of removing the support; the center of the circle is provided with a round hole, and a telescopic thimble is arranged in the round hole and used for removing the bracket connected with the upper die.
the automatic production method of the colored contact lenses is realized on the automatic production system, and 8 lower dies are connected together in groups to form a regular octagon before entering a lower die moving and conveying die plate; the turntable a rotates clockwise, the turntable b rotates anticlockwise, and the method comprises the following processes:
step 0-1: firstly, placing a group of 8 lower dies which are connected together on a lifting platform a; then the lifting platform a descends, and a group of 8 lower dies which are connected together are placed on 8 lower die bases; then the lower die cutting plate is lowered, and the support connected with the 8 lower dies is removed, so that 8 independent lower dies are obtained; then the lower die adsorption device conveys 8 lower dies in a group to a lower die moving and feeding plate;
Step 0-2: firstly, placing a group of 8 upper dies connected together on a lifting platform b; then the lifting platform b descends, and 8 upper dies which are connected together in a group are placed on 8 upper die bases; then lowering the upper die cutting disc, and removing the support connected with the 8 upper dies to obtain 8 independent upper dies; then the upper die adsorption device conveys 8 upper dies in a group to an upper die moving and feeding disc;
Step 1: 8 lower dies in the lower die moving and feeding disc are transferred to the clamping seat 61 of the transfer printing device turntable a by the mechanical arm C35 twice;
step 2: the turntable a starts to rotate intermittently, and rotates for a certain angle every time the turntable a rotates once; at the moment, the lower die comes below the pad printing machine, and the pad printing rubber head pad prints the color patterns on the inner surface of the lower die from the steel plate engraved with the patterns; a transparent electrostatic film is arranged between the lower die and the second metal plate of the static removing device, and the rubber head can print on the transparent electrostatic film after printing patterns on the groove of the lower die by the transfer printing rubber head, so that the static on the rubber head can be removed, the residual pigment on the rubber head can be cleaned, and finally, not only can the sundries be reduced, but also the color difference can be reduced, and the consistency of the colors of the patterns can be ensured;
and step 3: the turntable a continues to start to rotate intermittently, at the moment, the lower die comes to a discharging position and enters the drying transition device through the disc moving mechanism 40;
and 4, step 4: after the lower die comes out of the drying transition device, the lower die is transferred into a first lower die clamping seat station 101 of a liquid injection pressing device turntable b through a lower die feeding device 38;
and 5: starting intermittent rotation of the turntable b, and rotating for 45 degrees once; when the lower die reaches the third lower die clamping seat station 103, the pressing device 33 right above presses the set of lower dies, so that the set of lower dies can be stably placed on the lower die groove;
step 6: the turntable b continues to rotate, and when the lower die rotates to the position of the fourth lower die clamping seat station along with the turntable b, the required amount of liquid lens material is injected into the lower die through 4 liquid injection heads on the liquid injection device 36 positioned right above the fourth lower die clamping seat station;
and 7: the turntable b continues to rotate, when the lower die rotates to the position of the fifth lower die clamping seat station along with the turntable b, 4 vacuum suction cups 19 on the pressing device 37 right above adsorb 4 upper dies and move to the position right above the third lower die clamping seat, and the upper dies are pressed into the lower dies with injection completed, so that the pressing of the upper dies and the lower dies is completed, and the die assembly is obtained;
And 8: the turntable b continues to rotate, and when the pressed die assembly rotates to the position where the seventh lower die clamping seat station is located along with the turntable b, the die clamping device 39 located right above the seventh lower die clamping seat station transfers the die assembly to the drying device 34 for drying and forming;
and demolding the dried mold assembly to obtain the colored contact lens.
compared with the prior art, the invention has the advantages that: the contact lens production device is reasonable and compact in layout, can effectively save space, and is suitable for an automatic production line.
Description of the drawings:
fig. 1 is a schematic structural view of an upper die and a lower die nested together, wherein 1 represents the upper die and 2 represents the lower die.
FIG. 2 is a schematic view of the upper mold, wherein 11 represents the concave spherical surface inside the upper mold, 12 represents the convex spherical surface working portion outside the upper mold, and 13 represents the outer edge of the upper portion of the upper mold.
Fig. 3 is a schematic view of the structure of the lower mold, wherein 21 represents the inner concave spherical working part of the lower mold, 22 represents the outer convex spherical shell of the lower mold, and 23 represents the outer edge of the upper part of the lower mold.
FIG. 4 is a schematic diagram of a moving die-feeding plate of a lower die in the embodiment, wherein 91, 92, 93, 94, 905, 96, 97 and 98 represent the die slots of the lower die.
fig. 5 is a schematic structural diagram of the moving upper die feeding plate in the embodiment, wherein 901, 902, 903, 904, 905, 906, 907 and 908 represent the upper die slots.
fig. 6 is a schematic structural diagram of a lower mold clamping seat in the embodiment, wherein 71, 72, 73 and 74 all represent lower mold grooves.
fig. 7 is a schematic diagram showing the assembled top view of the automatic colored contact lens manufacturing system in the embodiment, wherein 31a, 31b, and 31C respectively represent a pad printing machine, 32 represents a drying transition device, 33 represents a pressing device in an injection molding press device, 34 represents a drying device, 35 represents a robot arm C, 36 represents an injection molding press device in the injection molding press device, 37 represents a pressing device in the injection molding press device, and 40 represents a tray moving mechanism.
fig. 8 is a schematic structural diagram of the turntable a in the embodiment, and in the diagram, 61, 62, 63, 64, 65, 66 all represent lower mold clamping seats.
Fig. 9 is a schematic structural diagram of a turntable b in the embodiment, in which 101 represents a first lower mold chuck station, 102 represents a second lower mold chuck station, 103 represents a third lower mold chuck station, 104 represents a fourth lower mold chuck station, 105 represents a fifth lower mold chuck, 106 represents a sixth lower mold chuck station, 107 represents a seventh lower mold chuck station, and 108 represents an eighth lower mold chuck station.
FIG. 10 is a schematic view showing the structure of a lower mold shearing apparatus in the example, in which 17 denotes a lower mold shearing disk; 41 for the lifting platform a and 42 for the lower mould lifting platform upright.
fig. 11 is a schematic structural view of the upper die shearing apparatus in the embodiment, in which 18 represents the upper die shearing disk, and 43 represents the lifting platforms b and 44 represent the upper die lifting platform upright.
fig. 12 is a schematic structural view of the pressing device in the embodiment, and in the figure, 19 denotes a vacuum chuck.
Fig. 13 is a schematic structural view of a lower mold suction device in the embodiment, in which 15 denotes a lower mold suction device and 9 denotes a lower mold moving feed tray.
fig. 14 is a schematic structural view of an upper mold suction device in the embodiment, in which 16 represents an upper mold suction device and 90 represents an upper mold moving feed tray.
FIG. 15 is a schematic structural diagram of a pad printing device in an embodiment, in which 31a represents a pad printing machine, 4 represents a patterned steel plate, 5 represents a rotary table a, 8 represents a pad printing head, and 12 represents a static electricity removing device.
fig. 16 is a schematic structural view of the static eliminating apparatus in the embodiment, in which,
FIG. 17 is a schematic view showing the structure of a lower die cutting apparatus in the example, and FIG. 17 represents the lower die cutting apparatus.
Fig. 18 is a schematic structural view of an upper die shearing apparatus in the example, and 18 represents the upper die shearing apparatus.
The specific implementation mode is as follows:
example (b):
referring to fig. 1-18, the implementation of the present invention is illustrated.
The automatic production system of colored contact lenses comprises: the contact lens comprises an upper die 1 and a lower die 2 which are nested together, wherein a gap between the upper die and the lower die is filled with a liquid forming raw material and is solidified to form the contact lens; the lower die comprises: a lower die inner concave spherical surface working part 21, a lower die outer convex spherical surface shell 22 and a lower die upper outer edge 23; the upper die comprises three parts: an upper die inner concave spherical surface 11, an upper die outer convex spherical surface working part 12 and an upper die upper outer edge 13; further comprising:
a pad printing device, a lower die moving and feeding tray, an upper die moving and feeding tray, a drying transition device 32, a liquid injection and pressing device, a drying device 34, a lower die adsorption device 15, an upper die adsorption device 16, a lower die shearing device and an upper die shearing device,
the pad printing apparatus includes: 3 pad printing machines 31a, 31b and 31c which are in one-to-one correspondence with the lower die card seats 62, 63 and 64, a steel plate 4 which is positioned on the pad printing machines and is engraved with patterns, a turntable a5, and 6 lower die card seats 61, 62, 63, 64, 65 and 66 which are uniformly positioned on the outer edge of the turntable a; 4 lower die grooves 71, 72, 73 and 74 are uniformly distributed on each lower die clamping seat, the pad printing machine corresponding to the 4 lower die grooves is provided with 4 pad printing rubber heads 8, the pad printing rubber heads can move up and down, left and right, and the 4 pad printing rubber heads correspond to the 4 lower die grooves in position relation; the transfer printing rubber head transfers and prints the color patterns to the inner surface of the lower die from the steel plate engraved with the patterns; the pad printing machine also comprises a static removing device 12, wherein the static removing device fixes transparent static films on two rotating shafts 121 and 122, the rotating shafts are fixed on supports 123 and 124, the supports are fixed on a first metal plate 125 through bolts, a motor is arranged behind one rotating shaft, the motor controls the rotating shaft to drive the transparent static films to rotate, the rotating speed is matched with the pad printing speed, and therefore the static films can be fully utilized; when the transfer printing rubber head prints patterns on the inner surface of the lower die, the rubber head can print on the static removing film, so that the static electricity on the rubber head can be removed, the residual pigment on the rubber head can be cleaned, and finally, not only can sundries be reduced, but also the color difference can be reduced, and the consistency of the pattern color is ensured;
the lower die adsorption device comprises 8 independent adsorption heads, and 8 lower dies of which the adsorption heads are in a group are conveyed to a lower die moving and feeding disc; the upper die adsorption device adsorption head conveys 8 upper dies in a group to an upper die moving and feeding disc;
Before the lower die enters a lower die moving and conveying die plate, every 8 lower dies are connected together in a group to form a regular octagon; the lower die shearing device cuts a group of 8 lower dies to form a single lower die; the adsorption head of the lower die adsorption device conveys 8 lower dies in a group to a lower die moving and feeding disc; lower mould shearing mechanism includes: a lower die mould shearing disc 17, a lifting platform a41 and a lower die lifting platform upright rod 42; the lower surface of the lower die cutting plate is provided with 9 round holes, wherein 8 round holes are uniformly distributed to form a circle and just correspond to 8 lower die bases, and telescopic thimbles are arranged in the round holes and are used for fixing the lower die on the lower die bases in the process of removing the support; the center of the circle is provided with a round hole, and a telescopic thimble is arranged in the round hole and used for removing a bracket connected with the lower die; the working process of the lower die shearing device is as follows: placing a group of 8 connected lower dies on a lifting platform a, then descending the lifting platform a, placing a group of 8 connected lower dies on 8 lower die bases, then descending a lower die cutting plate, and removing a support connected with the 8 lower dies to obtain 8 independent lower dies; then the lower die adsorption device conveys 8 lower dies in a group to a lower die moving and feeding plate;
before the upper dies enter the movable die conveying disc, every 8 upper dies are connected together in a group to form a regular octagon; the upper die shearing device cuts the 8 upper dies in one group to form a single upper die; the upper die adsorption device adsorption head conveys 8 upper dies in a group to an upper die moving and feeding disc; go up mould shearing mechanism includes: an upper die shearing disc 18, a lifting platform b43, an upper die lifting platform upright 44; the lower surface of the upper die cutting disc is provided with 9 round holes, wherein 8 round holes are uniformly distributed to form a circle and just correspond to 8 upper die bases, and telescopic thimbles are arranged in the round holes and are used for fixing the upper die on the upper die bases in the process of removing the support; the center of the circle is provided with a round hole, and a telescopic thimble is arranged in the round hole and used for removing a bracket connected with the upper die; the working process of the upper die shearing device is as follows: placing a group of 8 upper dies connected together on a lifting platform b, then descending the lifting platform b, placing a group of 8 upper dies connected together on 8 upper die bases, then descending an upper die cutting disc, and removing a support connected with the 8 upper dies to obtain 8 independent upper dies; then the upper die adsorption device conveys 8 upper dies in a group to an upper die moving and feeding disc;
the lower die moving and feeding plate is uniformly distributed with 8 lower die grooves 91, 92, 93, 94, 95, 96, 97 and 98, and each lower die groove can be used for placing 1 lower die; 8 lower dies in the lower die moving and feeding disc are transferred to the clamping seat 61 of the transfer printing device turntable a by the mechanical arm C35 twice;
the upper mold moving and conveying plate is uniformly distributed with 8 upper mold grooves 901, 902, 903, 904, 905, 906, 907 and 908, and each upper mold groove can be used for placing 1 upper mold;
the drying transition device dries the lower die printed with patterns to ensure that the pigment is quick to dry;
Annotate liquid compression fittings includes: a turntable b, 8 lower mold clamping seats uniformly positioned at the outer edge of the turntable b, a first lower mold clamping seat, a second lower mold clamping seat, a third lower mold clamping seat, a fourth lower mold clamping seat, a fifth lower mold clamping seat, a sixth lower mold clamping seat, a seventh lower mold clamping seat and an eighth lower mold clamping seat in sequence, wherein the corresponding stations are a first lower mold clamping seat station 101, a second lower mold clamping seat station 102, a third lower mold clamping seat station 103, a fourth lower mold clamping seat station 104, a fifth lower mold clamping seat station 105, a sixth lower mold clamping seat station 106, a seventh lower mold clamping seat station 107 and an eighth lower mold clamping seat station 108 in sequence, 4 lower mold grooves are uniformly distributed on each lower mold clamping seat, an injection loading device 38 positioned above the first lower mold clamping seat station, a pressing device 33 positioned above the third lower mold clamping seat station, an injection device 36 positioned above the fourth lower mold clamping seat station, and a pressing device 37 positioned above the fifth lower mold clamping seat, a clamping device 39 located above the seventh lower mold clamping seat station; there are 4 vacuum chuck on the compression fittings, adsorb 4 and go up the mould, the pressfitting process:
the lower die from the drying transition device is transferred to a first lower die clamping seat station of the turntable b by the liquid injection feeding device, the turntable b starts to rotate, when the lower die rotates to the position of a third lower die clamping seat station along with the turntable b, the turntable b stops rotating, and the pressing device 33 positioned right above the third lower die clamping seat station presses the set of lower dies at the moment, so that the set of lower dies can be stably placed on the lower die groove; the turntable b continues to rotate, when the lower die rotates to the position of the fourth lower die clamping seat station along with the turntable b, the turntable b stops rotating, and at the moment, required amount of liquid lens material is injected into the lower die through 4 liquid injection heads on the liquid injection device 36 positioned right above the fourth lower die clamping seat station; the turntable b continues to rotate, when the lower die after liquid injection is finished rotates to the position of the station of the fifth lower die clamping seat along with the turntable b, the turntable b stops rotating, at the moment, 4 vacuum suction cups 19 on a pressing device 37 positioned right above the fifth lower die clamping seat adsorb 4 upper dies and move to the position right above the third lower die clamping seat, and the upper dies are pressed into the lower dies after liquid injection is finished, so that the upper dies and the lower dies are pressed together, and a die assembly is obtained; the turntable b continues to rotate, when the pressed die assembly rotates to the position of the seventh lower die clamping seat station along with the turntable b, the turntable b stops rotating, and the die clamping device 39 positioned right above the seventh lower die clamping seat station transfers the die assembly to the drying device 34 for drying and forming;
The drying device comprises an oven tunnel, and a conveyor belt is arranged in the oven tunnel.
the automatic production method of the colored contact lenses is realized on the automatic production system, and 8 lower dies are connected together in groups to form a regular octagon before entering a lower die moving and conveying die plate; the turntable a rotates clockwise, the turntable b rotates anticlockwise, and the method comprises the following processes:
step 0-1: firstly, placing a group of 8 lower dies which are connected together on a lifting platform a; then the lifting platform a descends, and a group of 8 lower dies which are connected together are placed on 8 lower die bases; then the lower die cutting plate is lowered, and the support connected with the 8 lower dies is removed, so that 8 independent lower dies are obtained; then the lower die adsorption device conveys 8 lower dies in a group to a lower die moving and feeding plate;
Step 0-2: firstly, placing a group of 8 upper dies connected together on a lifting platform b; then the lifting platform b descends, and 8 upper dies which are connected together in a group are placed on 8 upper die bases; then lowering the upper die cutting disc, and removing the support connected with the 8 upper dies to obtain 8 independent upper dies; then the upper die adsorption device conveys 8 upper dies in a group to an upper die moving and feeding disc;
step 1: 8 lower dies in the lower die moving and feeding disc are transferred to the clamping seat 61 of the transfer printing device turntable a by the mechanical arm C35 twice; the following steps are illustrated by a group of lower dies on the clamping seat;
step 2: the turntable a starts to rotate intermittently, and the turntable a rotates 60 degrees every time the turntable a rotates once; at this time, the lower die comes under the pad printing machine 31a, and the pad printing rubber head transfers the color patterns to the inner surface of the lower die from the steel plate engraved with the patterns; a transparent electrostatic film is arranged between the lower die and the second metal plate of the static removing device, and the rubber head can print on the transparent electrostatic film after printing patterns on the groove of the lower die by the transfer printing rubber head, so that the static on the rubber head can be removed, the residual pigment on the rubber head can be cleaned, and finally, not only can the sundries be reduced, but also the color difference can be reduced, and the consistency of the colors of the patterns can be ensured;
and step 3: the turntable a continues to start intermittent rotation, and after the turntable a rotates 180 degrees, the lower die reaches a discharging position and enters the drying transition device through the tray moving mechanism 40;
and 4, step 4: after the lower die comes out of the drying transition device, the lower die is transferred into a first lower die clamping seat station 101 of a liquid injection pressing device turntable b through a lower die feeding device 38;
and 5: starting intermittent rotation of the turntable b, and rotating for 45 degrees once; when the lower die reaches the third lower die clamping seat station 103, the pressing device 33 right above presses the set of lower dies, so that the set of lower dies can be stably placed on the lower die groove;
step 6: the turntable b continues to rotate, and when the lower die rotates to the position of the fourth lower die clamping seat station along with the turntable b, the required amount of liquid lens material is injected into the lower die through 4 liquid injection heads on the liquid injection device 36 positioned right above the fourth lower die clamping seat station;
and 7: the turntable b continues to rotate, when the lower die rotates to the position of the fifth lower die clamping seat station along with the turntable b, 4 vacuum suction cups 19 on the pressing device 37 right above adsorb 4 upper dies and move to the position right above the third lower die clamping seat, and the upper dies are pressed into the lower dies with injection completed, so that the pressing of the upper dies and the lower dies is completed, and the die assembly is obtained;
and 8: the turntable b continues to rotate, and when the pressed die assembly rotates to the position where the seventh lower die clamping seat station is located along with the turntable b, the die clamping device 39 located right above the seventh lower die clamping seat station transfers the die assembly to the drying device 34 for drying and forming;
and demolding the dried mold assembly to obtain the colored contact lens.
in the invention, the rotating direction of the turntable a, the number of the lower die clamping seats, the number of the pad printing machines, the rotating direction of the turntable b and the number of the lower die clamping seats can be adjusted according to actual arrangement.
Claims (8)
1. An automated colored contact lens production system comprising: the contact lens comprises an upper die (1) and a lower die (2), wherein the upper die and the lower die are nested together, and a gap between the upper die and the lower die is filled with a liquid forming raw material and is solidified to form the contact lens; it is characterized in that the lower die comprises: a lower die inner concave spherical surface working part (21), a lower die outer convex spherical surface shell (22) and a lower die upper outer edge (23); the upper die comprises three parts: an upper die inner concave spherical surface (11), an upper die outer convex spherical surface working part (12) and an upper die upper outer edge (13); further comprising:
the transfer printing device (31), the lower die moving and die feeding disc (9), the upper die moving and die feeding disc (90), the drying transition device (32), the liquid injection pressing device and the drying device (34);
The pad printing apparatus includes: at least 1 pad printing machine (31a), a steel plate (4) engraved with patterns on the pad printing machine, a turntable a (5), and 6 lower die clamping seats (61, 62, 63, 64, 65, 66) uniformly positioned on the outer edge of the turntable a; 4 lower die mold grooves (71, 72, 73 and 74) are uniformly distributed on each lower die clamping seat, the pad printing machine corresponding to the 4 lower die mold grooves is provided with 4 pad printing rubber heads (8), the pad printing rubber heads can move up and down, left and right, and the 4 pad printing rubber heads correspond to the 4 lower die mold grooves in position relation; the transfer printing rubber head transfers and prints the color patterns to the inner surface of the lower die from the steel plate engraved with the patterns;
the lower die moving and feeding plate is uniformly distributed with 8 lower die grooves (91, 92, 93, 94, 95, 96, 97 and 98), and each lower die groove can be used for placing 1 lower die; 8 lower dies in the lower die moving and feeding disc are transferred to a clamping seat (61) of a turntable a of the pad printing device by a mechanical arm C (35) twice;
8 upper mould grooves (901, 902, 903, 904, 905, 906, 907 and 908) are uniformly distributed on the upper mould moving and conveying plate, and 1 upper mould can be placed in each upper mould groove;
the drying transition device dries the lower die printed with patterns to ensure that the pigment is quick to dry;
annotate liquid compression fittings includes: a turntable b, 8 lower mold clamping seats uniformly positioned at the outer edge of the turntable b, a first lower mold clamping seat, a second lower mold clamping seat, a third lower mold clamping seat, a fourth lower mold clamping seat, a fifth lower mold clamping seat, a sixth lower mold clamping seat, a seventh lower mold clamping seat and an eighth lower mold clamping seat in sequence, wherein the corresponding stations are a first lower mold clamping seat station (101), a second lower mold clamping seat station (102), a third lower mold clamping seat station (103), a fourth lower mold clamping seat station (104), a fifth lower mold clamping seat station (105), a sixth lower mold clamping seat station (106), a seventh lower mold clamping seat station (107) and an eighth lower mold clamping seat station (108), 4 lower mold grooves are uniformly distributed on each lower mold clamping seat, an injection loading device (38) positioned above the first lower mold clamping seat station, a pressing device (33) positioned above the third lower mold clamping seat station, and an injection device (36) positioned above the fourth lower mold clamping seat station, the pressing device (37) is positioned above the fifth lower die clamping seat station, and the clamping device (39) is positioned above the seventh lower die clamping seat station; there are 4 vacuum chuck on the compression fittings, adsorb 4 and go up the mould, the pressfitting process:
The lower die from the drying transition device is transferred to a first lower die clamping seat station of a turntable b by a liquid injection feeding device, the turntable b starts to rotate, when the lower die rotates to the position of a third lower die clamping seat station along with the turntable b, the turntable b stops rotating, and a pressing device (33) positioned right above the third lower die clamping seat station presses the set of lower dies at the moment, so that the set of lower dies can be stably placed on a lower die groove; the turntable b continues to rotate, when the lower die rotates to the position of the fourth lower die clamping seat station along with the turntable b, the turntable b stops rotating, and at the moment, required amount of liquid lens material is injected into the lower die through 4 liquid injection heads on a liquid injection device (36) positioned right above the fourth lower die clamping seat station; the turntable b continues to rotate, when the lower die after liquid injection is finished rotates to the position of a station of a fifth lower die clamping seat along with the turntable b, the turntable b stops rotating, at the moment, 4 vacuum suction cups (19) on a pressing device (37) positioned right above the fifth lower die clamping seat adsorb 4 upper dies and move right above the third lower die clamping seat, and the upper dies are pressed into the lower dies after liquid injection is finished, so that the upper dies and the lower dies are pressed together, and a die assembly is obtained; the turntable b continues to rotate, when the pressed die assembly rotates to the position of the seventh lower die clamping seat station along with the turntable b, the turntable b stops rotating, and the die assembly is transferred to a drying device (34) by a die clamping device (39) positioned right above the seventh lower die clamping seat station for drying and forming;
the drying device comprises an oven tunnel, and a conveyor belt is arranged in the oven tunnel.
2. the automatic production system of colored contact lenses according to claim 1, wherein the pad printing machine further comprises a static removing device (12), the static removing device fixes the transparent electrostatic film on two rotating shafts (121, 122), the rotating shafts are fixed on supports (123, 124), the supports are fixed on the first metal plate (125) through bolts, a motor is arranged behind one of the rotating shafts, the motor controls the rotating shafts to drive the transparent electrostatic film to rotate, the rotating speed is matched with the pad printing speed, so that the electrostatic film can be fully utilized, a cushion block (126) and a second metal plate (127) are arranged between the two rotating shafts, the cushion block is arranged on the first metal plate, the second metal plate is arranged on the cushion block, and the transparent electrostatic film (128) is spread on the second metal plate; when the transfer printing rubber head prints patterns on the inner surface of the lower die, the rubber head can be printed on the static removing film, the static electricity on the rubber head can be removed under the action of the rubber head, the residual pigment on the rubber head can be cleaned, finally, impurities can be reduced, and chromatic aberration can be reduced, so that the consistency of the colors of the patterns is ensured.
3. the automated colored contact lens production system of claim 2, further comprising: a lower die adsorption device (15) and an upper die adsorption device (16);
The lower die adsorption device comprises 8 independent adsorption heads, and 8 lower dies of which the adsorption heads are in a group are conveyed to a lower die moving and feeding disc;
and the upper die adsorption device adsorption head conveys 8 upper dies in a group to the upper die moving and feeding disc.
4. The automatic colored contact lens production system according to claim 3, further comprising: a lower die shearing device and an upper die shearing device;
Before the lower die enters a lower die moving and conveying die plate, every 8 lower dies are connected together in a group to form a regular octagon; the lower die shearing device cuts a group of 8 lower dies to form a single lower die; the adsorption head of the lower die adsorption device conveys 8 lower dies in a group to a lower die moving and feeding disc;
Before the upper dies enter the movable die conveying disc, every 8 upper dies are connected together in a group to form a regular octagon; the upper die shearing device cuts the 8 upper dies in one group to form a single upper die; and the upper die adsorption device adsorption head conveys 8 upper dies in a group to the upper die moving and feeding disc.
5. the automatic colored contact lens production system according to claim 4, wherein the lower mold cutting device comprises: a lower die mould shearing disc (17), a lifting platform a (41) and a lower die lifting platform upright rod (42); go up mould shearing mechanism includes: an upper die shearing disc (18), a lifting platform b (43) and an upper die lifting platform upright rod (44);
The working process of the lower die shearing device is as follows: placing a group of 8 connected lower dies on a lifting platform a, then descending the lifting platform a, placing a group of 8 connected lower dies on 8 lower die bases, then descending a lower die cutting plate, and removing a support connected with the 8 lower dies to obtain 8 independent lower dies; then the lower die adsorption device conveys 8 lower dies in a group to a lower die moving and feeding plate;
The working process of the upper die shearing device is as follows: placing a group of 8 upper dies connected together on a lifting platform b, then descending the lifting platform b, placing a group of 8 upper dies connected together on 8 upper die bases, then descending an upper die cutting disc, and removing a support connected with the 8 upper dies to obtain 8 independent upper dies; then the upper die adsorption device conveys the 8 upper dies in a group to an upper die moving and feeding plate.
6. the automatic production system of colored contact lenses according to claim 5,
The lower surface of the lower die cutting plate is provided with 9 round holes, wherein 8 round holes are uniformly distributed to form a circle and just correspond to 8 lower die bases, and telescopic thimbles are arranged in the round holes and are used for fixing the lower die on the lower die bases in the process of removing the support; the center of the circle is provided with a round hole, and a telescopic thimble is arranged in the round hole and used for removing a bracket connected with the lower die;
the lower surface of the upper die cutting disc is provided with 9 round holes, wherein 8 round holes are uniformly distributed to form a circle and just correspond to 8 upper die bases, and telescopic thimbles are arranged in the round holes and are used for fixing the upper die on the upper die bases in the process of removing the support; the center of the circle is provided with a round hole, and a telescopic thimble is arranged in the round hole and used for removing the bracket connected with the upper die.
7. The method for automatically producing colored contact lenses, which is implemented on the automatic production system of claim 1, wherein the turntable a rotates clockwise and the turntable b rotates counterclockwise, comprising the following processes:
Step 1: 8 lower dies in the lower die moving and feeding disc are transferred to a clamping seat (61) of a turntable a of the pad printing device by a mechanical arm C (35) twice;
Step 2: the turntable a starts to rotate intermittently, and rotates for a certain angle every time the turntable a rotates once; at the moment, the lower die comes below the pad printing machine, and the pad printing rubber head pad prints the color patterns on the inner surface of the lower die from the steel plate engraved with the patterns;
and step 3: the turntable a continues to start to rotate intermittently, at the moment, the lower die comes to a discharging position and enters the drying transition device through the disc moving mechanism (40);
and 4, step 4: after the lower die comes out of the drying transition device, the lower die is transferred into a first lower die clamping seat station (101) of a liquid injection pressing device turntable b through a lower die feeding device (38);
And 5: starting intermittent rotation of the turntable b, and rotating for 45 degrees once; when the lower die reaches a third lower die clamping seat station (103), a pressing device (33) right above presses the set of lower dies, so that the set of lower dies can be stably placed on the lower die groove;
step 6: the turntable b continues to rotate, and when the lower die rotates to the position of a fourth lower die clamping seat station along with the turntable b, required amount of liquid lens material is injected into the lower die through 4 liquid injection heads on a liquid injection device (36) positioned right above the fourth lower die clamping seat station;
and 7: the turntable b continues to rotate, when the lower die rotates to the position of the station of the fifth lower die clamping seat along with the turntable b, 4 vacuum suction cups (19) on a pressing device (37) right above adsorb 4 upper dies and move to the position right above the third lower die clamping seat, and the upper dies are pressed into the lower dies with liquid injection completed, so that the upper dies and the lower dies are pressed together, and a die assembly is obtained;
and 8: the turntable b continues to rotate, and when the pressed die assembly rotates to the position of the seventh lower die clamping seat station along with the turntable b, the die clamping device (39) positioned right above the seventh lower die clamping seat station transfers the die assembly to the drying device (34) for drying and forming;
and demolding the dried mold assembly to obtain the colored contact lens.
8. the method of automatically producing colored contact lenses carried out on the automatic production system of claim 6, wherein the lower molds are connected together in groups of 8 pieces to form a regular octagon before entering the lower mold moving and feeding tray; the turntable a rotates clockwise, the turntable b rotates anticlockwise, and the method comprises the following processes:
step 0-1: firstly, placing a group of 8 lower dies which are connected together on a lifting platform a; then the lifting platform a descends, and a group of 8 lower dies which are connected together are placed on 8 lower die bases; then the lower die cutting plate is lowered, and the support connected with the 8 lower dies is removed, so that 8 independent lower dies are obtained; then the lower die adsorption device conveys 8 lower dies in a group to a lower die moving and feeding plate;
step 0-2: firstly, placing a group of 8 upper dies connected together on a lifting platform b; then the lifting platform b descends, and 8 upper dies which are connected together in a group are placed on 8 upper die bases; then lowering the upper die cutting disc, and removing the support connected with the 8 upper dies to obtain 8 independent upper dies; then the upper die adsorption device conveys 8 upper dies in a group to an upper die moving and feeding disc;
Step 1: 8 lower dies in the lower die moving and feeding disc are transferred to a clamping seat (61) of a turntable a of the pad printing device by a mechanical arm C (35) twice;
Step 2: the turntable a starts to rotate intermittently, and rotates for a certain angle every time the turntable a rotates once; at the moment, the lower die comes below the pad printing machine, and the pad printing rubber head pad prints the color patterns on the inner surface of the lower die from the steel plate engraved with the patterns; a transparent electrostatic film is arranged between the lower die and the second metal plate of the static removing device, and the rubber head can print on the transparent electrostatic film after printing patterns on the groove of the lower die by the transfer printing rubber head, so that the static on the rubber head can be removed, the residual pigment on the rubber head can be cleaned, and finally, not only can the sundries be reduced, but also the color difference can be reduced, and the consistency of the colors of the patterns can be ensured;
and step 3: the turntable a continues to start to rotate intermittently, at the moment, the lower die comes to a discharging position and enters the drying transition device through the disc moving mechanism (40);
And 4, step 4: after the lower die comes out of the drying transition device, the lower die is transferred into a first lower die clamping seat station (101) of a liquid injection pressing device turntable b through a lower die feeding device (38);
And 5: starting intermittent rotation of the turntable b, and rotating for 45 degrees once; when the lower die reaches a third lower die clamping seat station (103), a pressing device (33) right above presses the set of lower dies, so that the set of lower dies can be stably placed on the lower die groove;
step 6: the turntable b continues to rotate, and when the lower die rotates to the position of a fourth lower die clamping seat station along with the turntable b, required amount of liquid lens material is injected into the lower die through 4 liquid injection heads on a liquid injection device (36) positioned right above the fourth lower die clamping seat station;
and 7: the turntable b continues to rotate, when the lower die rotates to the position of the station of the fifth lower die clamping seat along with the turntable b, 4 vacuum suction cups (19) on a pressing device (37) right above adsorb 4 upper dies and move to the position right above the third lower die clamping seat, and the upper dies are pressed into the lower dies with liquid injection completed, so that the upper dies and the lower dies are pressed together, and a die assembly is obtained;
and 8: the turntable b continues to rotate, and when the pressed die assembly rotates to the position of the seventh lower die clamping seat station along with the turntable b, the die clamping device (39) positioned right above the seventh lower die clamping seat station transfers the die assembly to the drying device (34) for drying and forming;
and demolding the dried mold assembly to obtain the colored contact lens.
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