CN110605804A - Injection molding system for contact lenses - Google Patents
Injection molding system for contact lenses Download PDFInfo
- Publication number
- CN110605804A CN110605804A CN201910915986.8A CN201910915986A CN110605804A CN 110605804 A CN110605804 A CN 110605804A CN 201910915986 A CN201910915986 A CN 201910915986A CN 110605804 A CN110605804 A CN 110605804A
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- die
- manipulator
- upper die
- lower die
- feeding
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 45
- 238000002347 injection Methods 0.000 claims abstract description 35
- 239000007924 injection Substances 0.000 claims abstract description 35
- 238000000465 moulding Methods 0.000 claims description 20
- 238000007514 turning Methods 0.000 claims description 16
- 238000007664 blowing Methods 0.000 claims description 15
- 230000007306 turnover Effects 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 239000000463 material Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 17
- 210000003128 head Anatomy 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 210000000887 face Anatomy 0.000 description 4
- 238000000748 compression moulding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003796 beauty Effects 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 208000026438 poor feeding Diseases 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 210000001747 pupil Anatomy 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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
- 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
-
- 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
- B29C43/34—Feeding the material to the mould or the compression 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
- 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The present invention relates to contact lens injection molding systems. A contact lens injection molding system, comprising: the injection molding machine comprises an upper die, a lower die, a die base and an injection molding head; further comprising: moving the feeding bar block, rotating the workbench, and arranging the mold bases on the rotating workbench; n U-shaped grooves are distributed on the feeding strip block in parallel; the mould row base comprises N parallel mould bases; the lower die manipulator, the liquid injection manipulator, the upper die manipulator and the die stripping manipulator are positioned above the rotary workbench and are sequentially distributed according to the rotating direction of the rotary workbench; a lower die feeding device; an upper die feeding device; and (5) overturning the workbench. Compared with the prior art, the invention has the advantages that: the injection molding method disclosed by the invention is simple to operate and low in cost, and can greatly improve the production efficiency and effectively reduce manpower and material resources.
Description
The technical field is as follows:
the invention relates to the field of contact lens preparation, in particular to a contact lens injection molding system.
Background art:
with the rapid development of the times, the lives of people are more and more diversified, and the pursuit of beauty and fashion is more and more changed day by day. In recent years, the pursuit of contact lenses and cosmetic pupils by young women has been on the rise, thereby greatly promoting the vigorous development of the contact lens industry, and the production process of contact lenses is continuously updated. From the conventional turning molding process to the current centrifugal molding method and the current press molding method, each manufacturer selects a production process suitable for the manufacturer according to the requirement and the technical mastery level.
In the traditional turning molding process, turning and polishing are indispensable, but because the two processes exist, from the molding process to the demolding process, all the processes of the production flow of the contact lenses are separated from each other, so that the full-automatic production of the contact lenses cannot be realized, a large amount of human resources and equipment resources are consumed, and unqualified phenomena such as bright spots, threads, scratches, luminosity errors, thickness errors and the like easily appear on the produced lenses, so that the production efficiency and the quality of the contact lenses are influenced, and the comfort level of the lenses produced by the turning molding process is not ideal according to market feedback, and the lenses are not suitable for being used as short-period disposable lenses.
In order to solve the problems caused by the turning forming process, more advanced production processes are developed, such as: centrifugal molding, press molding, etc., and among them, press molding is widely used at present. The molding method is also called as a mold molding method, and the process flow is as follows: firstly, an upper die (male die) and a lower die (female die) with set parameters are manufactured by using a die injection molding machine, then, liquid lens materials are injected into the female die, the male die is embedded into the female die and is compressed to form a die composition, then, the die composition is heated or irradiated by ultraviolet rays to be cured, and finally, the die is released, so that the needed lens is obtained. The compression molding method has the advantages of high production efficiency, simple operation, controllable quality and low cost, and the lens produced by the method has soft texture and comfortable wearing, and is suitable for being used as a short-period disposable lens. Over the years, the shorter the rejection cycle and the more popular the consumer is, the more the contact lenses on the market are, which requires the manufacturers to have powerful lens production capacity, so that the advanced compression molding production process becomes the determining factor for the competition of the manufacturers.
However, the injection molding process of the current compression molding method has a poor feeding system and a high failure probability of equipment, so that the smoothness of full-automatic production line production of the contact lenses is influenced, and the bubble rate of the produced lenses is also high, so that the qualification rate of the lenses is influenced. Under the circumstances, a contact lens injection molding device and method with a complete and reasonable feeding system structure and a low failure rate are needed, so that the full-automatic flow line production of the contact lenses is ensured, manpower and material resources are reduced, the bubble rate of the produced lenses can be reduced, and the product yield is improved.
The invention content is as follows:
the invention aims to provide a full-automatic contact lens injection molding device, aiming at ensuring full-automatic production of contact lenses. The specific technical scheme is as follows:
a contact lens injection molding system, comprising: the injection molding machine comprises an upper die 1, a lower die 2, a die base 3 and an injection molding head; the lower die is embedded on the die base, the liquid molding raw material is injected into the lower die by the injection head, the upper die is embedded into the lower die, a gap between the upper die and the lower die is filled with the liquid molding raw material, and the liquid molding raw material is solidified to form the contact lens; the upper die comprises two parts, namely: a lower spherical working portion 11, an upper head-holding portion 12; the lower die comprises three parts, namely: an inner concave spherical working part 21, an outer convex spherical shell 22 and an upper outer rim 23; further comprising:
moving a feeding bar block 4, rotating a workbench 5, and arranging a mold base 6 on the rotating workbench; the lower die manipulator, the liquid injection manipulator, the upper die manipulator and the die stripping manipulator are positioned above the rotary workbench and are sequentially distributed according to the rotating direction of the rotary workbench; the lower die feeding device, the upper die feeding device and the turnover workbench are arranged on the upper die;
one end of the feeding strip block is distributed with N U-shaped grooves 41 side by side, and the other end is provided with a blind section 42; the moving direction of the feeding bar block is vertical to the moving direction of the upper die or the lower die before entering the feeding bar block, when the upper die or the lower die are intersected with each other, the upper die or the lower die enter the U-shaped groove one by one through the notches of the U-shaped groove, and when the feeding bar block continues to move and the intersection point reaches the blind section at the other end, the upper die or the lower die is blocked outside the moving feeding bar block; the inductor 97 is positioned above the intersection position of the upper die and the lower die, and when no idle U-shaped groove is detected at the intersection position, the control part of the system stops feeding of the upper die feeding device or the lower die feeding device;
the base is arranged to the mould includes N mould base 3 that stands side by side, and the mould base includes: the middle cylindrical cavity 31 and the upper boss 32 are uniformly distributed on the rotating workbench of the base of the die row, and the base of the die row is moved to the next adjacent station when the die row rotates once;
the lower die manipulator transfers the lower die from the movable feeding bar block to a die base row on a rotating workbench, after the rotating workbench rotates once, the liquid injection manipulator aligns a group of liquid injection heads to a group of lower dies on the die base row for liquid injection, after the rotating workbench continues to rotate once, the upper die manipulator places a group of upper dies into the corresponding lower dies with the liquid injection completed, after the rotating workbench continues to rotate once again, the mold discharging manipulator removes the upper dies and the lower dies in the die base row from the rotating workbench together to complete an automatic injection molding process;
lower mould feeder 7 includes: a first vibration disk, a lower die feed channel 74 connected to the first vibration disk discharge channel 73; the lower die is placed on the lower die feeding device in a state that the outer convex spherical shell is in contact with the lower die feeding device; a third vibrating table is arranged below the lower die feeding channel, the moving direction of the lower die feeding channel is perpendicular to the moving direction of the movable feeding strip blocks, and the lower dies enter the movable feeding strip blocks one by one through the openings of the U-shaped grooves; the first vibratory pan includes: a first vibrating table 71, a first conical surface 72 on the vibrating table, and a spiral discharging channel 73 tangent to the outer edge of the first conical surface;
go up mould feeder 8, include: a second vibratory pan, an upper die feed channel 84 tangent to the tapered edge 83 of the second vibratory pan; the upper die is placed on the upper die feeding device in a state that the upper clamping part faces downwards, and the lower spherical working part faces upwards; a fourth vibrating table is arranged below the upper die feeding channel, the moving direction of the upper die feeding channel is perpendicular to the moving direction of the movable feeding strip blocks, and the upper dies enter the movable feeding strip blocks one by one through the openings of the U-shaped grooves; the second vibratory pan includes: a second vibration table 81, a second tapered surface 82 on the second vibration table;
the turning workbench turns over a group of upper dies in the movable feeding strip block to change the upper clamping part to be upward and the lower spherical working part to be downward; and the upper die manipulator lifts a group of upper dies on the turnover worktable and places the upper dies into corresponding lower dies which are injected with liquid.
In a preferred embodiment, the turnover table includes: a first end support 91, a second end support 92, a turning shaft 93 positioned between the two, a first clamping member 95, a second clamping member 96 and a clamping force application mechanism 94, wherein the first clamping member 95 and the second clamping member 96 are respectively fixedly connected with the turning shaft; the first clamping part and the second clamping part can reach the upper part of the feeding strip block under the driving of the turnover shaft, the upper die is clamped under the action of the clamping force application mechanism, then the upper die is turned for 180 degrees, and then the upper die is loosened, and the upper die manipulator conveys the turned upper die to the next station. Further, still include:
the upper die air blowing pipe is positioned at the upper die discharge port of the upper die feeding device, the lower die air blowing pipe is positioned at the lower die feeding device discharge port, and the upper die air blowing pipe and the lower die air blowing pipe are used for blowing off dust on the surfaces of the concave spherical working part in the lower die and the lower spherical working part of the upper die.
The second preferred scheme further comprises: and when the sensor senses that no idle U-shaped groove exists, the ejector pins rise to prevent the upper die or the lower die from continuously flowing into the feeding channel.
In the third preferred scheme, the rotary worktable is circular, 4 mold base rows are symmetrically distributed around the circle center, and a lower mold manipulator, a liquid injection manipulator, an upper mold manipulator and a mold stripping manipulator which correspond to the mold base rows respectively and are sequentially arranged clockwise or anticlockwise; rotating the initial position of the workbench, and transferring the lower die from the movable feeding bar block to the die base row on the rotating workbench by the lower die manipulator; then the workbench is rotated by 90 degrees clockwise or anticlockwise, the mould base row is carried to a station of a liquid injection manipulator, and the liquid injection manipulator aligns a group of liquid injection heads to a group of lower moulds on the mould base row for liquid injection; then the workbench is rotated for 90 degrees, the die base rows are conveyed to the upper die manipulator stations, and a group of upper dies are embedded into the corresponding lower dies; then the rotary worktable continues to rotate by 90 degrees, the die base row is carried to a station of the demolding manipulator, and the demolding manipulator moves the upper die and the lower die which are nested together out of the rotary worktable.
Compared with the prior art, the invention has the advantages that: the injection molding method disclosed by the invention is simple to operate and low in cost, and can greatly improve the production efficiency and effectively reduce manpower and material resources.
Description of the drawings:
FIG. 1 is a schematic view showing the assembly of the upper and lower molds after the injection of a liquid in the embodiment of the present invention. In the figure, the upper mold is denoted by 2 and the lower mold is denoted by 2.
Fig. 2 is a schematic view of the upper mold of fig. 1, with 11 representing the lower spherical working portion and 12 representing the upper head clamping portion.
Fig. 3 is a schematic structural view of the lower mold in fig. 1, and 22 represents an external convex spherical shell.
Fig. 4 is a top view of fig. 3, where 21 represents the inner concave spherical working portion and 23 represents the upper outer edge.
Fig. 5 is a schematic structural view of an upper part of the rotary table in the embodiment, wherein 5 denotes the rotary table and 6 denotes the die base row.
Fig. 6 is a schematic view of the structure of the rows of mould bases, where 3 denotes the mould bases, the number of which side by side is determined by the actual need, only 5 being listed.
Fig. 7 is a left side view of fig. 6, in which 31 denotes a middle cylindrical cavity.
Fig. 8 is a top view of fig. 6, where 32 represents an upper boss.
Fig. 9 is a schematic structural diagram of a moving feed bar block in the embodiment, wherein 41 represents a U-shaped groove, and 42 represents a blind section.
Fig. 10 is a plan view of fig. 9.
Fig. 11 is a schematic structural view of an upper die feeding device in the embodiment, in which 8 denotes the upper die feeding device, 81 denotes the second vibrating table, and 82 denotes the second tapered surface.
FIG. 12 is a top view of FIG. 11, where 82 represents a second tapered surface, 83 represents a tapered edge, 84 represents an upper die feed channel, and 4 represents a feed bar block that interfaces with an upper die feed device.
Fig. 13 is a schematic structural view of a lower die feeding device in the embodiment, in which 7 denotes the lower die feeding device, 71 denotes a first vibrating table, 72 denotes a first tapered surface, and 73 denotes a spiral discharging passage.
Fig. 14 is a top view of fig. 13, where 72 represents a first tapered surface, 73 represents a helical gate, 74 represents a lower die feed channel, and 4 represents a feed bar block that interfaces with a lower die feed device.
Fig. 15 is a schematic top view of the structure of the turnover device in the embodiment, in which 4 represents a feeding bar block, 91 represents a first end support, 92 represents a second end support, 93 represents a turnover shaft, 94 represents a clamping force application mechanism, 95 represents a first clamping member, and 96 represents a second clamping member.
Fig. 16 is a schematic rear view of the structure of the turning device in the embodiment, in which 4 denotes a feed bar block, 91 denotes a first end support, 93 denotes a turning shaft, 95 denotes a first holding member, and 96 denotes a second holding member.
Fig. 17 is a schematic structural diagram of an inductor and a thimble in the embodiment, in which 1 represents an upper mold, 97 represents an inductor, and 98 represents a thimble.
The specific implementation mode is as follows:
example (b):
the embodiments of the present invention will be described with reference to fig. 1 to 17.
A contact lens injection molding system, comprising: the injection molding machine comprises an upper die 1, a lower die 2, a die base 3 and an injection molding head; the lower die is embedded on the die base, the liquid molding raw material is injected into the lower die by the injection head, the upper die is embedded into the lower die, a gap between the upper die and the lower die is filled with the liquid molding raw material, and the liquid molding raw material is solidified to form the contact lens; the upper die comprises two parts, namely: a lower spherical working portion 11, an upper head-holding portion 12; the lower die comprises three parts, namely: an inner concave spherical working part 21, an outer convex spherical shell 22 and an upper outer rim 23; further comprising:
moving a feeding bar block 4, rotating a workbench 5, and arranging a mold base 6 on the rotating workbench; the lower die manipulator, the liquid injection manipulator, the upper die manipulator and the die stripping manipulator are positioned above the rotary workbench and are sequentially distributed according to the rotating direction of the rotary workbench; the lower die feeding device, the upper die feeding device and the turnover workbench are arranged on the upper die;
one end of the feeding strip block is provided with 10U-shaped grooves 41 in parallel, and the other end of the feeding strip block is provided with a blind section 42; the moving direction of the feeding bar block is vertical to the moving direction of the upper die or the lower die before entering the feeding bar block, when the upper die or the lower die are intersected with each other, the upper die or the lower die enter the U-shaped groove one by one through the notches of the U-shaped groove, and when the feeding bar block continues to move and the intersection point reaches the blind section at the other end, the upper die or the lower die is blocked outside the moving feeding bar block; the inductor 97 is positioned above the intersection position of the upper die and the lower die, and when no idle U-shaped groove is detected at the intersection position, the control part of the system stops feeding of the upper die feeding device or the lower die feeding device;
the base is arranged to the mould includes 10 mould bases 3 that parallel, and the mould base includes: the middle cylindrical cavity 31 and the upper boss 32 are uniformly distributed on the rotating workbench of the base of the die row, and the base of the die row is moved to the next adjacent station when the die row rotates once;
the lower die manipulator transfers the lower die from the movable feeding bar block to a die base row on a rotating workbench, after the rotating workbench rotates once, the liquid injection manipulator aligns a group of liquid injection heads to a group of lower dies on the die base row for liquid injection, after the rotating workbench continues to rotate once, the upper die manipulator places a group of upper dies into the corresponding lower dies with the liquid injection completed, after the rotating workbench continues to rotate once again, the mold discharging manipulator removes the upper dies and the lower dies in the die base row from the rotating workbench together to complete an automatic injection molding process;
lower mould feeder 7 includes: a first vibration disk, a lower die feed channel 74 connected to the first vibration disk discharge channel 73; the lower die is placed on the lower die feeding device in a state that the outer convex spherical shell is in contact with the lower die feeding device; a third vibrating table is arranged below the lower die feeding channel, the moving direction of the lower die feeding channel is perpendicular to the moving direction of the movable feeding strip blocks, and the lower dies enter the movable feeding strip blocks one by one through the openings of the U-shaped grooves; the first vibratory pan includes: a first vibrating table 71, a first conical surface 72 on the vibrating table, and a spiral discharging channel 73 tangent to the outer edge of the first conical surface;
go up mould feeder 8, include: a second vibratory pan, an upper die feed channel 84 tangent to the tapered edge 83 of the second vibratory pan; the upper die is placed on the upper die feeding device in a state that the upper clamping part faces downwards, and the lower spherical working part faces upwards; a fourth vibrating table is arranged below the upper die feeding channel, the moving direction of the upper die feeding channel is perpendicular to the moving direction of the movable feeding strip blocks, and the upper dies enter the movable feeding strip blocks one by one through the openings of the U-shaped grooves; the second vibratory pan includes: a second vibration table 81, a second tapered surface 82 on the second vibration table;
the turning workbench turns over a group of upper dies in the movable feeding strip block to change the upper clamping part to be upward and the lower spherical working part to be downward; lifting a group of upper dies on the turnover worktable by the upper die manipulator, and placing the upper dies into corresponding lower dies which are filled with liquid;
the turnover table comprises: a first end support 91, a second end support 92, a turning shaft 93 positioned between the two, a first clamping member 95, a second clamping member 96 and a clamping force application mechanism 94, wherein the first clamping member 95 and the second clamping member 96 are respectively fixedly connected with the turning shaft; the first clamping part and the second clamping part can reach the upper part of the feeding strip block under the driving of the turnover shaft, the upper die is clamped under the action of the clamping force application mechanism, then the upper die is turned for 180 degrees, and then the upper die is loosened, and the upper die manipulator conveys the turned upper die to the next station. Further, still include:
the upper die air blowing pipe is positioned at the upper die discharge port of the upper die feeding device, the lower die air blowing pipe is positioned at the lower die feeding device discharge port, and the upper die air blowing pipe and the lower die air blowing pipe are used for blowing off dust on the surfaces of the concave spherical working part in the lower die and the lower spherical working part of the upper die;
further comprising: and when the sensor senses that no idle U-shaped groove exists, the ejector pins rise to prevent the upper die or the lower die from continuously flowing into the feeding channel.
The rotary worktable is circular, 4 mould base rows are symmetrically distributed around the circle center, and a lower mould manipulator, a liquid injection manipulator, an upper mould manipulator and a mould stripping manipulator which correspond to the mould base rows respectively and are sequentially arranged clockwise or anticlockwise; rotating the initial position of the workbench, and transferring the lower die from the movable feeding bar block to the die base row on the rotating workbench by the lower die manipulator; then the workbench is rotated by 90 degrees clockwise or anticlockwise, the mould base row is carried to a station of a liquid injection manipulator, and the liquid injection manipulator aligns a group of liquid injection heads to a group of lower moulds on the mould base row for liquid injection; then the workbench is rotated for 90 degrees, the die base rows are conveyed to the upper die manipulator stations, and a group of upper dies are embedded into the corresponding lower dies; then the rotary worktable continues to rotate by 90 degrees, the die base row is carried to a station of the demolding manipulator, and the demolding manipulator moves the upper die and the lower die which are nested together out of the rotary worktable.
Claims (5)
1. A contact lens injection molding system, comprising: the injection molding machine comprises an upper die (1), a lower die (2), a die base (3) and an injection molding head; the lower die is embedded on the die base, the liquid molding raw material is injected into the lower die by the injection head, the upper die is embedded into the lower die, a gap between the upper die and the lower die is filled with the liquid molding raw material, and the liquid molding raw material is solidified to form the contact lens; it is characterized in that the upper die comprises two parts, namely: a lower spherical working part (11), an upper head clamping part (12); the lower die comprises three parts, namely: an inner concave spherical working part (21), an outer convex spherical shell (22) and an upper outer edge (23); further comprising:
the device comprises a movable feeding strip block (4), a rotary workbench (5) and a mould base row (6) positioned on the rotary workbench; the lower die manipulator, the liquid injection manipulator, the upper die manipulator and the die stripping manipulator are positioned above the rotary workbench and are sequentially distributed according to the rotating direction of the rotary workbench; the lower die feeding device, the upper die feeding device and the turnover workbench are arranged on the upper die;
one end of the feeding strip block is distributed with N U-shaped grooves (41) side by side, and the other end is provided with a blind section (42); the moving direction of the feeding bar block is vertical to the moving direction of the upper die or the lower die before entering the feeding bar block, when the upper die or the lower die are intersected with each other, the upper die or the lower die enter the U-shaped groove one by one through the notches of the U-shaped groove, and when the feeding bar block continues to move and the intersection point reaches the blind section at the other end, the upper die or the lower die is blocked outside the moving feeding bar block; a sensor (97) positioned above the intersection position of the upper die and the lower die, when the control part of the system detects that no idle U-shaped groove exists in the intersection position, the feeding of the upper die feeding device or the lower die feeding device is stopped;
the base is arranged to the mould includes N mould base (3) that parallel, and the mould base includes: the mould row base is uniformly distributed on the rotary worktable, and the mould row base is moved to the next adjacent station when rotating once;
the lower die manipulator transfers the lower die from the movable feeding bar block to a die base row on a rotating workbench, after the rotating workbench rotates once, the liquid injection manipulator aligns a group of liquid injection heads to a group of lower dies on the die base row for liquid injection, after the rotating workbench continues to rotate once, the upper die manipulator places a group of upper dies into the corresponding lower dies with the liquid injection completed, after the rotating workbench continues to rotate once again, the mold discharging manipulator removes the upper dies and the lower dies in the die base row from the rotating workbench together to complete an automatic injection molding process;
lower mould feeder (7) comprising: the first vibrating disk is a lower die feeding channel (74) connected with the first vibrating disk discharging channel (73); the lower die is placed on the lower die feeding device in a state that the outer convex spherical shell is in contact with the lower die feeding device; a third vibrating table is arranged below the lower die feeding channel, the moving direction of the lower die feeding channel is perpendicular to the moving direction of the movable feeding strip blocks, and the lower dies enter the movable feeding strip blocks one by one through the openings of the U-shaped grooves; the first vibratory pan includes: the device comprises a first vibrating table (71), a first conical surface (72) positioned on the vibrating table, and a spiral discharging channel (73) tangent to the outer edge of the first conical surface;
go up mould feeder (8), include: the upper die feeding channel (84) is tangent to the conical surface edge (83) of the second vibrating disk; the upper die is placed on the upper die feeding device in a state that the upper clamping part faces downwards, and the lower spherical working part faces upwards; a fourth vibrating table is arranged below the upper die feeding channel, the moving direction of the upper die feeding channel is perpendicular to the moving direction of the movable feeding strip blocks, and the upper dies enter the movable feeding strip blocks one by one through the openings of the U-shaped grooves; the second vibratory pan includes: a second vibration table (81), a second taper surface (82) on the second vibration table;
the turning workbench turns over a group of upper dies in the movable feeding strip block to change the upper clamping part to be upward and the lower spherical working part to be downward; and the upper die manipulator lifts a group of upper dies on the turnover worktable and places the upper dies into corresponding lower dies which are injected with liquid.
2. The contact lens injection molding system of claim 1, wherein the flipping station comprises: a first end support (91), a second end support (92), a turning shaft (93) positioned between the first end support and the second end support, a first clamping component (95), a second clamping component (96) and a clamping force application mechanism (94), wherein the first clamping component and the second clamping component are respectively fixedly connected with the turning shaft; the first clamping part and the second clamping part can reach the upper part of the feeding strip block under the driving of the turnover shaft, the upper die is clamped under the action of the clamping force application mechanism, then the upper die is turned for 180 degrees, and then the upper die is loosened, and the upper die manipulator conveys the turned upper die to the next station.
3. The contact lens injection molding system of claim 2, further comprising: the upper die air blowing pipe is positioned at the upper die discharge port of the upper die feeding device, the lower die air blowing pipe is positioned at the lower die feeding device discharge port, and the upper die air blowing pipe and the lower die air blowing pipe are used for blowing off dust on the surfaces of the concave spherical working part in the lower die and the lower spherical working part of the upper die.
4. A contact lens injection molding system according to any one of claims 1-3, further comprising: and when the inductor senses that no idle U-shaped groove exists, the ejector pin is lifted, so that the upper die or the lower die is prevented from continuously flowing into the feeding channel.
5. An injection molding system for contact lenses according to any one of claims 1 to 3, wherein said rotary table is circular, 4 rows of mold bases are symmetrically distributed around the center of the circle, and a lower mold manipulator, a liquid injection manipulator, an upper mold manipulator and a mold ejection manipulator are arranged in sequence clockwise or counterclockwise corresponding to the rows of mold bases; rotating the initial position of the workbench, and transferring the lower die from the movable feeding bar block to the die base row on the rotating workbench by the lower die manipulator; then the workbench is rotated by 90 degrees clockwise or anticlockwise, the mould base row is carried to a station of a liquid injection manipulator, and the liquid injection manipulator aligns a group of liquid injection heads to a group of lower moulds on the mould base row for liquid injection; then the workbench is rotated for 90 degrees, the die base rows are conveyed to the upper die manipulator stations, and a group of upper dies are embedded into the corresponding lower dies; then the rotary worktable continues to rotate by 90 degrees, the die base row is carried to a station of the demolding manipulator, and the demolding manipulator moves the upper die and the lower die which are nested together out of the rotary worktable.
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| CN201910915986.8A CN110605804B (en) | 2019-09-26 | 2019-09-26 | Contact lens injection molding system |
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| CN201910915986.8A CN110605804B (en) | 2019-09-26 | 2019-09-26 | Contact lens injection molding system |
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| CN110605804B CN110605804B (en) | 2024-04-16 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101678573A (en) * | 2007-05-18 | 2010-03-24 | 库柏维景国际控股公司 | Thermal curing methods and systems for forming contact lenses |
| CN108340605A (en) * | 2017-01-25 | 2018-07-31 | 周志宏 | Contact lenses fluid injection molding machine and its fluid injection forming method |
| CN108422611A (en) * | 2018-05-17 | 2018-08-21 | 丹阳天创机械设备制造有限公司 | A kind of full mould filling machine of full-automatic invisible glasses |
| CN211137873U (en) * | 2019-09-26 | 2020-07-31 | 甘肃天后光学科技有限公司 | Injection molding system for contact lenses |
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2019
- 2019-09-26 CN CN201910915986.8A patent/CN110605804B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101678573A (en) * | 2007-05-18 | 2010-03-24 | 库柏维景国际控股公司 | Thermal curing methods and systems for forming contact lenses |
| CN108340605A (en) * | 2017-01-25 | 2018-07-31 | 周志宏 | Contact lenses fluid injection molding machine and its fluid injection forming method |
| CN108422611A (en) * | 2018-05-17 | 2018-08-21 | 丹阳天创机械设备制造有限公司 | A kind of full mould filling machine of full-automatic invisible glasses |
| CN211137873U (en) * | 2019-09-26 | 2020-07-31 | 甘肃天后光学科技有限公司 | Injection molding system for contact lenses |
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