CN213107977U - Special double-PP (polypropylene) mold for new-generation silicone hydrogel contact lens - Google Patents

Abstract

The utility model discloses a special-purpose new-generation silicon hydrogel contact lens double PP mould, which comprises a base, wherein a lower template is fixedly arranged on the upper end surface of the base, an upper template is arranged above the lower template, a forming cavity is arranged on the upper end surface of the lower template, an adapting bulge is arranged on the lower end surface of the upper template corresponding to the forming cavity, a fixing mechanism is arranged between the upper template and the base, and a stripping part is arranged on the lower template, the utility model relates to a special-purpose new-generation silicon hydrogel contact lens double PP mould, which achieves the effects of convenient discharging, difficult damage, even raw material injection, improved product qualification rate and the like by arranging a buffer spring, a cooling pipeline, a shunt passage and the like, solves the problems that the existing mould for manufacturing silicon hydrogel contact lenses is inconvenient in discharging, easy to damage the contact lens main body and often uneven distribution of raw material injection, leading to the problem of product yield reduction.

Description

Special double-PP (polypropylene) mold for new-generation silicone hydrogel contact lens

Technical Field

The utility model relates to a contact lens mould technical field specifically is a two PP moulds of new generation silicon hydrogel contact lens are exclusively used in.

Background

The oxygen permeability of the contact lenses is one of the most important indexes for measuring the wearing health level and comfort of the lenses, the introduction of the silicon hydrogel material becomes a breakthrough point for improving the oxygen permeability coefficient of the lenses, international leading contact lens production companies have successfully developed several products with excellent performance, and the material characteristics of the common silicon hydrogel lenses are very soft compared with the traditional hydroxyethyl methacrylate material lenses, so that the wearing comfort is brought, and meanwhile, the traditional turning process cannot be used for preparation and processing.

The existing mold for manufacturing the silicon hydrogel contact lens is inconvenient in discharging, the contact lens main body is easy to damage, and raw materials are often unevenly distributed during injection, so that the yield of products is reduced.

Disclosure of Invention

The utility model aims at providing a two PP moulds of new generation silica hydrogel contact lens are exclusively used in to solve the problem of proposing among the above-mentioned background art.

The technical scheme of the utility model is that: the utility model provides a two PP moulds of new generation silicon hydrogel contact lens is exclusively used in, includes the base, fixed mounting has the lower bolster on the up end of base, the top of lower bolster is provided with the cope match-plate pattern, the shaping chamber has been seted up on the up end of lower bolster, it is provided with the adaptation arch to correspond shaping chamber position department on the lower terminal surface of cope match-plate pattern, be provided with fixed establishment between cope match-plate pattern and the base, be provided with on the lower bolster and take off the material part.

Preferably, the fixing mechanism comprises a fixing frame, the fixing frame is fixedly installed on the left side and the right side of the upper template, a locking block is fixedly installed on the outer side of the fixing frame, a threaded seat is arranged on the upper end face of the base corresponding to the locking block, and the locking block and the threaded seat are fixedly installed through a screw rod.

Preferably, a plurality of guide rods which are symmetrically distributed are fixedly installed on the upper end face of the base, guide grooves are formed in the positions, corresponding to the guide rods, of the fixing frame, the guide rods are correspondingly inserted into the guide grooves, buffer springs are sleeved on the outer sides of the guide rods, and the buffer springs are fixedly installed on the upper end face of the base.

Preferably, the stripping component comprises a material ejecting groove, the material ejecting groove is formed in the bottom of the forming cavity, a material ejecting frame is arranged inside the material ejecting groove, a plurality of symmetrically distributed connecting rods are fixedly mounted on the lower end face of the material ejecting frame, and a jacking plate penetrates through the base and is fixedly mounted on the connecting rods.

Preferably, a cooling pipeline is arranged inside the lower template.

Preferably, be provided with the sprue on the up end of cope match-plate pattern, the sprue groove has been seted up on the up end of sprue, the inside of cope match-plate pattern is provided with the intercommunication runner, be provided with sprue and a plurality of evenly distributed's subchannel on the intercommunication runner, the sprue communicates with the sprue groove mutually, the subchannel extends to on the bellied lower terminal surface of adaptation.

The utility model has the advantages that: the utility model provides a two PP moulds of new generation silica hydrogel contact lens is exclusively used in, the cavity that forms through the protruding compound die of shaping chamber and adaptation carries out the processing production of contact lens, the material part is taken off in the utilization conveniently takes off the material, fixed establishment fixes the cope match-plate pattern, improve the stability in processing, the cope match-plate pattern carries out fixed mounting through latch segment and screw thread seat etc., guide bar and guide way cooperation carry out the guide orientation, improve the compound die precision, carry out the cope match-plate pattern through buffer spring and carry out shock attenuation buffer protection, rise through the ejection of compact frame, utilize the jack-up board to conveniently take off the material with the jack-up of processing product edge, reduce the damage risk, through the cooling of cooling tube processing template, and improve machining efficiency, set up through a plurality of subchannels, make the raw materials pour into more evenly. The utility model relates to a two PP moulds of new generation silicon hydrogel contact lens are exclusively used in, through setting up buffer spring, cooling tube and subchannel etc. have reached and have made things convenient for the ejection of compact, and difficult damage, the raw materials pours into evenly, improves product percent of pass and equals the effect, has solved the present mould that is used for silicon hydrogel contact lens to make, and the ejection of compact is inconvenient, the fragile contact lens main part, and the raw materials pours into often unevenly distributed into often, leads to the problem that the product yields descends.

Drawings

The invention will be further described with reference to the following drawings and examples:

FIG. 1 is a schematic structural diagram of a dual PP mold dedicated to a new generation of silicone hydrogel contact lenses;

fig. 2 is a schematic structural diagram of an upper template in a double-PP mold specially used for a new-generation silicone hydrogel contact lens.

In the figure: the method comprises the following steps of 1-base, 2-lower template, 3-upper template, 4-forming cavity, 5-adaptive protrusion, 6-fixing frame, 7-guide groove, 8-locking block, 9-screw rod, 10-thread seat, 11-guide rod, 12-buffer spring, 13-cooling pipeline, 14-material ejecting groove, 15-material ejecting frame, 16-jacking plate, 17-connecting rod, 18-material injection port, 19-material injection groove, 20-main flow channel, 21-communicating flow channel and 22-sub flow channel.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example one

Referring to fig. 1-2, the present invention provides a technical solution: the utility model provides a two PP moulds of new generation silicon hydrogel contact lens is exclusively used in, includes base 1, fixed mounting has lower bolster 2 on the up end of base 1, the top of lower bolster 2 is provided with cope match-plate pattern 3, the molding chamber 4 has been seted up on the up end of lower bolster 2, it is provided with the protruding 5 of adaptation to correspond molding chamber 4 position department on the lower terminal surface of cope match-plate pattern 3, be provided with fixed establishment between cope match-plate pattern 3 and the base 1, be provided with on the lower bolster 2 and take off the material part.

The contact lens is processed and produced through a cavity formed by combining the molding cavity 4 and the adaptive protrusion 5, the material is conveniently taken off by using the material taking-off component, the upper template 3 is fixed by the fixing mechanism, and the processing stability is improved.

Example two

Compared with the first embodiment, the difference lies in that the fixing mechanism comprises a fixing frame 6, the fixing frame 6 is fixedly installed on the left side and the right side of the upper template 3, a locking block 8 is fixedly installed on the outer side of the fixing frame 6, a threaded seat 10 is arranged on the upper end face of the base 1 corresponding to the locking block 8, and the locking block 8 and the threaded seat 10 are fixedly installed through a screw rod 9.

The upper end face of the base 1 is fixedly provided with a plurality of guide rods 11 which are symmetrically distributed, the position of the fixing frame 6 corresponding to the guide rods 11 is provided with a guide groove 7, the guide rods 11 are correspondingly inserted in the guide groove 7, the outer side of each guide rod 11 is sleeved with a buffer spring 12, and the buffer springs 12 are fixedly arranged on the upper end face of the base 1.

The upper die plate 3 is fixedly installed through a locking block 8, a threaded seat 10 and the like, the guide rod 11 is matched with the guide groove 7 for guiding and positioning, the die assembly precision is improved, and the upper die plate 3 is subjected to damping and buffering protection through a buffer spring.

EXAMPLE III

Compared with the embodiment, the material stripping component has the difference that the material stripping component comprises a material ejecting groove 14, the material ejecting groove 14 is arranged at the bottom of the forming cavity 4, a material ejecting frame 15 is arranged inside the material ejecting groove 14, a plurality of symmetrically distributed connecting rods 17 are fixedly arranged on the lower end face of the material ejecting frame 15, and the connecting rods 17 penetrate through the base 1 and are fixedly provided with the jacking plates 16.

The material pushing frame 15 ascends, the edge of a processed product is pushed up by the jacking plate 14 to be conveniently taken off, and the damage risk is reduced.

Example four

Compared with the embodiment, the difference is that the lower template 2 is internally provided with a cooling pipeline 13.

The cooling of the processing template through the cooling pipeline 13 improves the processing efficiency.

EXAMPLE five

Compared with the fourth embodiment, the difference lies in that a feeding hole 18 is formed in the upper end face of the upper template 3, a feeding groove 19 is formed in the upper end face of the feeding hole 18, a communicating flow channel 21 is formed in the upper template 3, a main flow channel 20 and a plurality of evenly distributed sub-flow channels 22 are formed in the communicating flow channel 21, the main flow channel 20 is communicated with the feeding groove 19, and the sub-flow channels 22 extend to the lower end face of the adapting protrusion 5.

Through the arrangement of the plurality of sub-runners 22, the raw materials are injected more uniformly, and the qualification rate of products is improved.

The above-mentioned embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which should not be construed as limiting the scope of the present invention. All modifications made according to the spirit of the main technical scheme of the present invention shall be covered within the protection scope of the present invention.

Claims (6)

1. The utility model provides a two PP moulds of new generation silica hydrogel contact lens is exclusively used in, includes base (1), its characterized in that: the material removing device is characterized in that a lower template (2) is fixedly mounted on the upper end face of the base (1), an upper template (3) is arranged above the lower template (2), a forming cavity (4) is formed in the upper end face of the lower template (2), an adaptation bulge (5) is arranged at the position of the upper template (3) corresponding to the forming cavity (4), a fixing mechanism is arranged between the upper template (3) and the base (1), and a material removing component is arranged on the lower template (2).

2. The special double PP mould for the new generation of silicone hydrogel contact lenses according to claim 1, wherein: the fixing mechanism comprises a fixing frame (6), the fixing frame (6) is fixedly installed on the left side and the right side of the upper template (3), a locking block (8) is fixedly installed on the outer side of the fixing frame (6), a threaded seat (10) is arranged on the upper end face of the base (1) in a position corresponding to the locking block (8), and the locking block (8) and the threaded seat (10) are fixedly installed through a screw rod (9).

3. The special double PP mould for the new generation of silicone hydrogel contact lenses according to claim 2, wherein: the guide rod (11) of a plurality of symmetric distribution is fixedly mounted on the upper end face of the base (1), a guide groove (7) is formed in the position, corresponding to the guide rod (11), of the fixing frame (6), the guide rod (11) is correspondingly inserted into the guide groove (7), a buffer spring (12) is sleeved on the outer side of the guide rod (11), and the buffer spring (12) is fixedly mounted on the upper end face of the base (1).

4. The special double PP mold for the new generation of silicone hydrogel contact lenses according to claim 3, wherein: the stripping component comprises a material ejection groove (14), the material ejection groove (14) is arranged at the bottom of the forming cavity (4), a material ejection frame (15) is arranged inside the material ejection groove (14), a plurality of symmetrically-distributed connecting rods (17) are fixedly arranged on the lower end face of the material ejection frame (15), and the connecting rods (17) penetrate through the base (1) and are fixedly provided with the jacking plate (16).

5. The special double PP mold for the new generation of silicone hydrogel contact lenses according to claim 4, wherein: and a cooling pipeline (13) is arranged in the lower template (2).

6. The special double PP mould for the new generation of silicone hydrogel contact lenses according to claim 5, wherein: be provided with sprue (18) on the up end of cope match-plate pattern (3), sprue groove (19) have been seted up on the up end of sprue (18), the inside of cope match-plate pattern (3) is provided with intercommunication runner (21), be provided with sprue (20) and a plurality of evenly distributed's subchannel (22) on intercommunication runner (21), sprue (20) are linked together with sprue groove (19), subchannel (22) extend to on the lower terminal surface of the protruding (5) of adaptation.

Images