CN213082107U

CN213082107U - Silicon hydrogel contact lens mold

Info

Publication number: CN213082107U
Application number: CN202021728088.6U
Authority: CN
Inventors: 张爱军
Original assignee: Pharnorcia Inc Wuhan
Current assignee: Pharnorcia Inc Wuhan
Priority date: 2020-08-13
Filing date: 2020-08-13
Publication date: 2021-04-30
Anticipated expiration: 2030-08-13

Abstract

The utility model discloses a silicon hydrogel contact lens mould, including formpiston and bed die, the bottom of formpiston is provided with the match plate, the bottom of bed die is provided with the die cavity, form the die cavity between match plate and the die cavity, the top of match plate is provided with interior neck, the top of match plate is provided with outer neck, be provided with annular bead on the circumference surface of interior neck, be provided with a set of pompon on the circumference inner wall of outer neck, pompon and bead joint cooperation. The utility model relates to a simple structure, the shaping high quality, efficient silicon hydrogel contact lens mould.

Description

Silicon hydrogel contact lens mold

Technical Field

The utility model relates to a technical field is made to contact lens, specifically is a silica hydrogel contact lens mould.

Background

The industry of contact lenses gradually replaces the turning preparation process of the old generation to change to the full-mold production preparation process, and the proper mold can provide higher production efficiency and better improve the product quality for the production of the lenses. However, the silicone hydrogel of the new generation is soft and not as stiff as the HEMA of the old generation in the process of preparing the lens, so that the obvious defects appear in the aspect of edge fitting, and a series of abnormal problems of the lens edge are caused, such as residual materials or fitting cracks, cracks and the like on the edge part, and the silicon hydrogel is basically completely cut or not cut well in serious cases.

Based on the current situation, a large-scale production mold technology and conditions which can provide perfect trimming in the lens preparation process, have ideal effect and stable lens quality and improve the production efficiency are urgently needed.

Disclosure of Invention

An object of the utility model is to provide a silicon hydrogel contact lens mould to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a silicon hydrogel contact lens mould, includes formpiston and bed die, the bottom of formpiston is provided with the convex die board, the bottom of bed die is provided with the die cavity, form the die cavity between convex die board and the die cavity board, the top of convex die board is provided with interior neck, the top of die cavity board is provided with outer neck, be provided with annular bead on the circumference surface of interior neck, be provided with a set of convex ball on the circumference inner wall of outer neck, convex ball and bead joint cooperation.

Preferably, the convex ball is hemispherical, and the one end that the arc top was kept away from to the convex ball is provided with the base, be provided with the mounting groove on the circumference inner wall of outer neck, the base passes through the screw detachable connection in the mounting groove.

Preferably, cooling channels are arranged in the convex die plate and the concave die plate, branch pipes are connected to two ends of each cooling channel, the branch pipes are connected with the branch pipes, and the branch pipes are connected with the main pipe.

Preferably, the upper ends of the side walls of the male die plate and the female die plate, which are back to the die cavity, are fixedly connected with heat insulation plates.

Preferably, the male die is made of PP or PBT material.

Preferably, the female die is made of PP material.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses in, at first to pouring into the polymerization liquid in the die cavity, then the formpiston impresses in the bed die with the complete block of bed die, treat the polymerization liquid cooling in the die cavity after separate formpiston and bed die completely, obtain the complete lens that need not cut with the fashioned lens drawing of patterns in the die cavity at last. The convex ball is matched with the convex edge in a clamping way. The convex ball is matched with the convex edge in a clamping way, so that better support and fixation are provided for the die in the heat preservation and cooling processes after die assembly is completed. The convex balls can be detachably connected, so that the convex balls can be conveniently replaced after being abraded, and the occlusion force of the die during die assembly is ensured. During cooling, the cooling speed is increased by the supercooled water in the cooling channel, and the production efficiency is improved. The main flow pipes on two sides are respectively used for supplying water and collecting water. The heated board keeps warm to the mould before the mould cooling, makes the lens have better shaping effect. The utility model relates to a simple structure, the shaping high quality, efficient silicon hydrogel contact lens mould.

Drawings

FIG. 1 is a schematic structural view of a silicone hydrogel contact lens mold;

fig. 2 is a partially enlarged view of fig. 1 at K.

In the figure: 1-male die, 2-female die, 3-inner neck, 4-outer neck, 5-male die plate, 6-female die plate, 7-die cavity, 8-cooling channel, 9-branch pipe, 10-branch pipe, 11-main flow pipe, 12-insulation board, 13-convex ball, 14-convex edge and 15-base.

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.

Referring to fig. 1-2, the present invention provides a technical solution:

the utility model provides a silicon hydrogel contact lens mould, includes formpiston 1 and bed die 2, the bottom of formpiston 1 is provided with convex die plate 5, the bottom of bed die 2 is provided with die block 6, form die cavity 7 between convex die plate 5 and the die block 6, the top of convex die plate 5 is provided with interior neck 3, the top of die block 6 is provided with outer neck 4, be provided with annular bead 14 on the circumference surface of interior neck 3, be provided with a set of convex ball 13 on the circumference inner wall of outer neck 4,

convex ball

13 and 14 joint cooperations of bead.

When the lens cutting device works, firstly, the polymerization liquid is injected into the mold cavity 7, then the male mold 1 is pressed into the female mold 2 to be completely clamped with the female mold 2, the male mold 1 and the female mold 2 are separated after the polymerization liquid in the mold cavity is completely cooled, and finally, the lens formed in the mold cavity 7 is subjected to demolding to obtain the complete lens which does not need to be cut. The stud ball 13 is snap-fitted with the rib 14. The convex ball 13 is matched with the convex rib 14 in a clamping mode, so that better support and fixation are provided for the die in the heat preservation and cooling processes after die assembly is completed.

Preferably, the convex ball 13 is hemispherical, a base 15 is arranged at one end, away from the arc top, of the convex ball 13, a mounting groove is formed in the inner wall of the circumference of the outer neck 4, and the base 15 is detachably connected in the mounting groove through a screw.

The convex balls 13 can be detachably connected, so that the convex balls can be conveniently replaced after being abraded, and the occlusion force of the die during die assembly is ensured.

Preferably, a cooling channel 8 is arranged in the male mold plate 5 and the female mold plate 6, branch pipes 9 are connected to two ends of the cooling channel 8, the branch pipes 9 are connected to branch pipes 10, and the branch pipes 10 are connected to a main flow pipe 11.

During cooling, the cooling speed is increased by the supercooled water in the cooling channel 8, and the production efficiency is improved. The main flow pipe 11 on both sides is used for water supply and water collection, respectively.

Preferably, the upper ends of the side walls of the male die plate 5 and the female die plate 6, which are opposite to the side of the die cavity 7, are fixedly connected with an insulation board 12.

The heated board 12 keeps warm to the mould before the mould cools off, makes the lens have better shaping effect.

Preferably, the male die 1 is made of PP or PBT material.

Preferably, the female die 2 is made of PP material.

The utility model discloses a theory of operation is: when the lens cutting device works, firstly, the polymerization liquid is injected into the mold cavity 7, then the male mold 1 is pressed into the female mold 2 to be completely clamped with the female mold 2, the male mold 1 and the female mold 2 are separated after the polymerization liquid in the mold cavity is completely cooled, and finally, the lens formed in the mold cavity 7 is subjected to demolding to obtain the complete lens which does not need to be cut. The stud ball 13 is snap-fitted with the rib 14. The convex ball 13 is matched with the convex rib 14 in a clamping mode, so that better support and fixation are provided for the die in the heat preservation and cooling processes after die assembly is completed. The convex balls 13 can be detachably connected, so that the convex balls can be conveniently replaced after being abraded, and the occlusion force of the die during die assembly is ensured. During cooling, the cooling speed is increased by the supercooled water in the cooling channel 8, and the production efficiency is improved. The main flow pipe 11 on both sides is used for water supply and water collection, respectively. The heated board 12 keeps warm to the mould before the mould cools off, makes the lens have better shaping effect.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A silicone hydrogel contact lens mold, comprising a male mold (1) and a female mold (2), characterized in that: the bottom of formpiston (1) is provided with convex die board (5), the bottom of bed die (2) is provided with die block (6), form die cavity (7) between convex die board (5) and die block (6), the top of convex die board (5) is provided with interior neck (3), the top of die block (6) is provided with outer neck (4), be provided with annular bead (14) on the circumference surface of interior neck (3), be provided with a set of convex ball (13) on the circumference inner wall of outer neck (4), convex ball (13) and bead (14) joint cooperation.

2. A silicone hydrogel contact lens mold of claim 1, wherein: protruding ball (13) are the hemisphere, and the one end that the arc top was kept away from in protruding ball (13) is provided with base (15), be provided with the mounting groove on the circumference inner wall of outer neck (4), base (15) can be dismantled through the screw and connect in the mounting groove.

3. A silicone hydrogel contact lens mold of claim 1, wherein: be provided with cooling channel (8) in convex die plate (5) and die plate (6), the both ends of cooling channel (8) are connected with and divide pipe (9), divide pipe (9) to link to each other with shunt tubes (10), shunt tubes (10) link to each other with mainstream pipe (11).

4. A silicone hydrogel contact lens mold of claim 1, wherein: and the upper ends of the side walls of the male die plate (5) and the female die plate (6) back to one side of the die cavity (7) are fixedly connected with an insulation board (12).

5. A silicone hydrogel contact lens mold of claim 1, wherein: the male die (1) is made of PP or PBT materials.

6. A silicone hydrogel contact lens mold of claim 1, wherein: the female die (2) is made of PP materials.