TWM562987U - Concave and convex mold for contact lens - Google Patents

Abstract

A contact lens concave and convex cover mold comprises a convex mold and a concave mold, the convex mold is provided with an inner ring body and a convex optical surface, and the inner ring body is provided with an upper inner ring wall, a middle inner ring wall and a lower inner ring a convex optical surface is coupled to the bottom of the lower inner ring wall, the concave die is provided with an outer ring body and a concave optical surface, and the outer ring body is provided with an upper outer ring wall, a middle outer ring wall and a lower outer ring wall, the concave The optical surface is coupled to the bottom of the lower outer ring wall, and the convex optical surface and the periphery of the concave optical surface can be adhered to each other, so that the convex optical surface and the concave optical surface are enclosed to form a molding cavity of the contact lens, and the inner ring wall of the convex mold The concave-convex structure which is mutually matched with the bottom of the outer ring wall of the concave die is combined with each other; when the punch and the die are relatively closed, the concave-convex structure can be stably combined and positioned, and the concave-convex structure does not coincide with each other. When the mold is closed, the concave optical surface or the convex optical surface is bent and deformed, and the concave-convex structure is adjacent to the molding cavity, and the convex optical surface and the concave optical surface are forcedly fixed, and the deformation of the molding cavity is prevented, thereby improving the production of the contact lens. rate.

Description

Contact lens concave and convex cover

The present invention relates to a contact lens concave and convex cover mold, in particular to a convex mold and a concave mold for forming a contact lens, and the two can be stably combined and positioned by mutually matching concave and convex structures, and the concave and convex structure is adjacent to the The molding cavity of the contact lens formed by the punch and the concave mold can forcibly fix the shape of the molding cavity to prevent the deformation of the molding cavity and affect the quality of the contact lens.

Contact lenses are usually formed by molding. Conventional contact lens molds are generally provided with a punch (or upper mold) and a female mold (or lower mold), which are formed by closing the mold and the concave mold. a molding cavity for injecting a polymer material into the molding cavity, and curing the polymer material by heating or illuminating, the molded polymer material is softened after being demolded, and then immersed in warm water. The manufacturing process of the contact lens can be completed.

The above polymer material generates a volatile gas during the curing process of heating or light. When the volatilization speed of the gas is too fast, the gas pressure generated by the volatilization easily pushes the punch (or the upper mold) upward, causing the position of the punch to be biased. The situation of the shift affects the accuracy of the molding of the punch and the die, which in turn causes the lens of the contact lens to be deformed, affecting the quality of the contact lens, resulting in a decrease in production yield.

In order to solve the above-mentioned shortcomings, some practitioners will squeeze the parts of the conventional punch and the die to be pressed and positioned together to prevent the volatile gas from propelling the displacement of the punch. For example, Taiwan M513776 "Mold of Contact Lens" In the patent case, when the upper and lower molds are combined, at least a partial structure of the fitting surface on the upper mold is embedded in at least a partial structure of the fitting surface below the lower mold, so that the lower fitting surface Slightly damaged by the upper fitting surface, the upper fitting surface can be engaged in the lower fitting surface.

However, it is customary for the upper fitting surface to extend the lower fitting surface outward, and the upper fitting surface must receive the thrust of the lower fitting surface to be compressed inwardly, so as to be embedded in the lower fitting surface, which is likely to cause up and down periods. The bending deformation of the mold affects the precision of the molding and the molding quality of the contact lens, resulting in a decrease in production yield.

In view of this, the creator has accumulated years of research and practical experience in related fields, and created a contact lens concave and convex mold to improve the lack of the above-mentioned conventional technology.

Therefore, the main purpose of the present invention is to provide a contact lens concave and convex cover mold comprising: a convex mold, an inner ring body and a convex optical surface, wherein the inner ring body is provided with an upper inner ring wall and a lower inner ring a wall, and a central inner ring wall between the upper inner ring wall and the lower inner ring wall, the convex optical surface is coupled to the bottom of the lower inner ring wall; a concave die having an outer ring body and a concave optics The outer ring body is provided with an upper outer ring wall, a lower outer ring wall, and a middle outer ring wall between the upper outer ring wall and the lower outer ring wall, and the concave optical surface is coupled to the lower outer ring wall a bottom surface; an inner surface of the interface between the lower outer ring wall and the concave optical surface of the die is provided with an annular flange facing the convex optical surface, and the convex optical surface and the periphery of the concave optical surface can be attached to each other, so that An annular flange contacts the convex optical surface, and the convex optical surface and the concave optical surface are enclosed by the annular flange to form a molding cavity; and the inner ring wall and the convex optical surface are connected under the convex die Between the junction of the outer ring wall and the concave optical surface below the die, through the concave-convex structure which is matched with each other, Positioning mutual combination.

With the above structure, when the punch and the die are relatively closed, the joint between the inner ring wall and the convex optical surface under the punch, and the joint between the outer ring wall and the concave optical surface below the die The concave and convex structures can be stably combined and positioned. Since the concave and convex structures are mutually matched, the concave optical surface or the convex optical surface is not bent and deformed when the mold is closed, and the concave and convex structure is adjacent to the molding cavity, and the convex optical is The surface of the concave and concave optical surfaces has a forced fixing effect. When the contact lens generates a volatile gas during the curing process, the concave-convex structure can firmly bond and fix the shape of the molding cavity, thereby preventing the molding cavity from being deformed by the volatile gas pressure. Improve the production yield of contact lenses. Improving the conventional contact lens mold is likely to cause bending deformation of the upper and lower molds during mold clamping, which affects the accuracy of the molding and the molding quality of the contact lens.

According to the above main structural features, the concave-convex structure comprises: a concave portion, an outer surface of the joint between the inner annular wall and the convex optical surface disposed under the convex mold; and a convex portion disposed under the outer annular wall of the concave mold and The inner surface of the interface of the concave optical surface is such that the annular flange is located between the convex portion and the concave optical surface, and the concave portion can be embedded and adhered to the convex portion.

According to the main structural feature, the inner surface of the outer ring wall of the lower die is provided with an interference portion adjacent to the convex portion, and the convex portion is located between the interference portions, and the interference portion can interfere with the concave portion to move in and out of the convex portion. unit.

According to the above main structural feature, the interference portion is provided with a first upper inclined surface and a first lower inclined surface, and the first upper inclined surface and the first lower inclined surface are coupled to form a convex first ridge portion, and the first upper inclined surface is coupled An inner surface of the inner and outer annular wall, the first lower inclined surface engaging the inner surface of the lower outer ring wall and having a predetermined distance from the annular flange, the concave portion being provided with a second upper inclined surface and a second lower surface The inclined surface, and the second upper inclined surface and the second lower inclined surface are coupled to form a convex second ridge, the second upper inclined surface engaging the outer surface of the lower inner ring wall, the second lower inclined surface engaging the convex optical surface, The second upper inclined surface of the concave portion can closely abut the first lower inclined surface of the interference portion, and the second ridge portion of the concave portion is embedded in the convex portion.

According to the above main structural features, the outer surface of the inner ring wall below the punch is provided with a sub-slope adjacent to the second upper bevel, and the sub-slope and the second upper bevel engage to form a concave valley, the interference portion The first upper inclined surface can closely abut the auxiliary inclined surface, so that the first ridge portion of the interference portion is embedded in the valley portion.

According to the above main structural features, the concave portion, the auxiliary inclined surface and the valley portion are respectively disposed on the outer surface of the inner ring of the convex mold, and the convex portion and the interference portion are respectively disposed on the inner surface of the outer ring of the concave mold.

According to the above main structural features, the outer surface of the inner ring wall of the punch is provided with a groove portion, and the outer surface of the lower inner ring wall and the convex optical surface is provided with a plurality of thin portions connecting the convex portion and the groove portion. ditch.

According to the above main structural features, the groove portion is disposed on the outer surface of the inner ring of the punch, and the plurality of fine grooves are arranged at intervals on the outer surface of the inner ring of the punch.

According to the above main structural features, the inner surface of the outer ring wall of the die is provided with a protruding buckle portion, and the outer surface of the inner ring wall of the punch is provided with a concave buckle groove, and the buckle portion can be fitted Positioned in the buckle groove.

According to the above main structural features, the buckle ring is disposed on the inner surface of the outer ring of the die, and the buckle groove is disposed on the outer surface of the inner ring of the punch.

According to the above main structural features, a ring piece is arranged on the top of the outer ring wall of the die, a ring piece is arranged on the top of the inner ring wall of the punching die, and a ring piece is arranged under the ring piece of the punching die. The shoulder on the die ring.

According to the above main structural features, the shoulder ring is provided on the outer surface of the inner ring of the punch.

In order to clarify and fully disclose the present invention, a preferred embodiment of the present invention will be described, and the detailed description thereof will be described later.

Referring to the first and second figures, the drawings of the present embodiment are disclosed. The above-mentioned drawings illustrate the contact lens concave and convex cover mold of the present invention, which comprises a convex mold 1 and a concave mold 2. The punch 1 is provided with an inner ring body 10 and a convex optical surface 14. The inner ring body 10 is provided with an upper inner ring wall 11, a lower inner ring wall 13, and a lower inner ring wall 11 and a lower inner ring wall. A middle inner ring wall 12 between the 13 is joined to the bottom of the lower inner ring wall 13. A ring piece 15 is disposed on the top of the inner ring wall 11 above the punch 1.

The die 2 is provided with an outer ring body 20 and a concave optical surface 24. The outer ring body 20 is provided with an upper outer ring wall 21, a lower outer ring wall 23, and the upper outer ring wall 21 and the lower outer ring wall. A middle outer ring wall 22 between the 23, the concave optical surface 24 is coupled to the bottom of the lower outer ring wall 23, and an inner surface of the joint portion of the lower outer ring wall 23 and the concave optical surface 24 is provided with a convex optical surface An annular flange 231 of 14 is also provided with a ring piece 25 on the top of the outer ring wall 21 above the die 2.

Referring to the third and fourth figures, the inner ring body 10 and the convex optical surface 14 of the punch 1 can be moved downward into the outer ring body 20 of the die 2 to form a clamping state, so that the convex optical of the punch 1 The periphery of the concave optical surface 24 of the surface 14 and the concave mold 2 can be adhered to each other, and the annular flange 231 contacts the convex optical surface 14 such that the convex optical surface 14 and the concave optical surface 24 pass through the annular convex surface. The rim 231 encloses a molding cavity 3 for receiving a raw material (for example, a polymer material) of the contact lens.

The figure also shows that in the preferred embodiment, the bottom of the inner ring wall 13 and the periphery of the convex optical surface 14 under the punch 1 and the bottom of the outer ring wall 23 and the concave optics of the lower die 2 The joints around the surface 24 are positioned in combination with each other via a concave-convex structure that is matched with each other.

Specifically, the concave-convex structure comprises a concave portion 130 and a convex portion 230, and the concave portion 130 is disposed on an outer surface of the joint between the inner annular wall 13 and the convex optical surface 14 under the convex mold 1;

The convex portion 230 is disposed on the inner surface of the joint between the outer ring wall 23 and the concave optical surface 24 under the concave mold 2, such that the annular flange 231 is located between the convex portion 230 and the concave optical surface 24. The recess 130 can be embedded and attached to the convex portion 230;

Moreover, the inner surface of the outer ring wall 23 of the lower die 2 is further provided with an interference portion 232 adjacent to the convex portion 230, and the convex portion 230 is located between the interference portions 232, and the interference portion 232 is provided with a first upper portion. The inclined surface 233, a first lower inclined surface 235, and the first upper inclined surface 233 and the first lower inclined surface 235 are coupled to form a convex first ridge 234, and the first upper inclined surface 233 is coupled to the inner surface of the middle outer annular wall 22. The first lower inclined surface 235 is coupled to the inner surface of the lower outer ring wall 23 and has a predetermined distance from the annular flange 231. The convex portion 230 and the interference portion 232 are respectively annularly disposed on the concave mold 2. The inner surface of the outer ring body 20;

The recessed portion 130 is provided with a second upper inclined surface 132 and a second lower inclined surface 133, and the second upper inclined surface 132 and the second lower inclined surface 133 are coupled to form a protruding second ridge 131, and the second upper inclined surface 132 is coupled. An outer surface of the lower inner ring wall 13 , the second lower inclined surface 133 is coupled to the convex optical surface 14 , wherein the second lower inclined surface 133 and the convex optical surface 14 have a predetermined distance therebetween;

An outer surface of the inner ring wall 13 below the punch 1 is provided with a sub-slope 134 adjacent to the second upper inclined surface 132. The sub-slope 134 and the second upper inclined surface 132 are coupled to form a concave valley 135; the recess 130, the auxiliary slope 134 and the valley portion 135 are respectively looped on the outer surface of the inner ring body 10 of the punch 1.

As shown in the third and fourth figures, when the male mold 1 and the female mold 2 are clamped, the second upper inclined surface 132 of the concave portion 130 can closely abut the first lower inclined surface 235 of the interference portion 232, so that the concave portion 130 The second ridge 131 is embedded in the convex portion 230 from above and below, and the first upper inclined surface 233 of the interference portion 232 can closely abut the auxiliary inclined surface 134, forcing the first ridge portion 234 of the interference portion 232 to be embedded in the valley. Part 135. Thereby, the interference portion 232 of the die 2 can interfere with the concave portion 130 of the punch 1 to move in and out of the convex portion 230.

It can be understood that when the punch 1 and the die 2 are relatively closed, the convex optical surface 14 and the concave optical surface 24 are enclosed by the annular flange 231 to form the molding cavity 3, so that the molding is performed. The cavity 3 is filled with the raw material of the contact lens; at the same time, the second upper inclined surface 132 of the concave portion 130 of the concave-convex structure closely abuts the first lower inclined surface 235 and the convex portion 230 of the interference portion 232, so that the concave portion 130 is embedded in the second ridge portion 131 The convex portion 230, and the first upper inclined surface 233 of the interference portion 232 of the concave-convex structure abuts against the auxiliary inclined surface 134, so that the first ridge portion 234 of the interference portion 232 is embedded in the valley portion 135, so that the convex mold 1 is below the inner portion Between the junction of the annular wall 13 and the convex optical surface 14 and the junction between the outer annular wall 23 and the concave optical surface 24 of the concave mold 2, the concave portion 130 and the convex portion 230 of the concave-convex structure are stably combined and positioned; During this period, since the concave portion 130 and the convex portion 230 of the concave-convex structure coincide with each other, the concave optical surface 24 or the convex optical surface 14 is not bent and deformed at the time of mold clamping.

Then, the contact lens material in the molding cavity 3 is cured by heating or illumination, during which a volatile gas is generated between the punch 1 and the die 2; at this time, due to the concave portion 130 of the concave-convex structure and The convex portion 230 is adjacent to the molding cavity 3, and can effectively forcibly fix the convex optical surface 14 and the periphery of the concave optical surface 24, so that the concave-convex structure firmly bonds and fixes the shape of the molding cavity 3, even if it has a large pressure. The gas can also be released from the gap between the punch 1 and the die 2, and it is not easy to open the combined punch 1 and the die 2, preventing the cavity from being deformed by the volatilization pressure, and avoiding the contact lens being affected by the displacement of the die. The quality of the situation, according to the production yield of contact lenses. When the contact lens is completely solidified and is to be detached from the punch 1 and the die 2, only a slight pulling force is applied, and the concave portion 130 of the concave-convex structure is separated from the convex portion 230 by the interference portion 232, so that the convex portion can be easily separated. The mold 1 and the die 2 are taken out of the contact lens.

As shown in the second and fourth embodiments, in a possible embodiment, the inner surface of the outer ring wall 21 of the die 2 is provided with a protruding button portion 211, and the button portion 211 is annularly disposed on the die. 2, the inner surface of the outer ring body 20; and the outer surface of the inner ring wall 11 on the punch 1 is provided with a concave buckle groove 111, so that the buckle groove 111 is annularly disposed on the inner ring body 10 of the punch 1. The outer surface. Thereby, when the punch 1 and the die 2 are clamped, the buckle portion 211 of the die 2 can be fitted and positioned in the buckle groove 111 of the punch 1, and the concave portion 130 and the convex portion of the concave and convex structure are matched. The combination means of 230 can be respectively positioned at the top end and the bottom end of the punch 1 and the die 2 to produce a double positioning effect in which the upper and lower ends are simultaneously fixed, thereby further enhancing the mold clamping combination of the punch 1 and the die 2. The stability.

In another possible embodiment, a shoulder portion 151 is disposed under the ring piece 15 at the top of the inner ring wall 11 on the punching die 1 so that the shoulder portion 151 is annularly disposed on the outer surface of the inner ring body 10 of the punching die 1. . When the punch 1 and the die 2 are clamped, the bottom of the shoulder 151 can abut against the top of the ring 25 of the die 2 to brake the punch 1 to be displaced downward, and the depth of the punch 1 is limited. .

As shown in the first and fifth figures, in another possible embodiment, the outer surface of the inner ring wall 12 of the punch 1 is provided with a groove portion 121, and the groove portion 121 is annularly disposed on the punch 1. The outer surface of the inner ring body 10 and the outer surface of the lower inner ring wall 13 and the convex optical surface 14 are provided with a plurality of narrow grooves 137 connecting the convex portion 230 and the groove portion 121, and the plurality of narrow grooves 137 are spaced apart. The outer surface of the inner ring body 10 of the punch 1 is formed. In this way, the gas volatilized by the raw material in the molding cavity 3 and the overflowing raw material can be emitted to the convex portion 230, and then dispersed to the groove portion 121 via the narrow groove 137, thereby contributing to reducing the action of the volatile gas. The pressure of the punch 1 and the die 2.

However, the above descriptions are only preferred embodiments of the present invention. When it is not possible to limit the scope of the creation of the creation, the changes and modifications that can be made by those who are familiar with the industry should be regarded as not deviating. The substance of this creation.

1‧‧‧ punch
10‧‧‧ Inner ring
11‧‧‧Upper inner ring wall
111‧‧‧ buckle groove
12‧‧‧中中环壁
121‧‧‧Slots
13‧‧‧Under the inner ring wall
130‧‧‧ recess
132‧‧‧Second upper bevel
131‧‧‧second ridge
133‧‧‧Second lower bevel
134‧‧‧Sub-bevel
135‧‧‧谷部
137‧‧‧ rill
14‧‧‧ convex optical surface
15, 25‧ ‧ ring
151‧‧‧ shoulder
2‧‧‧ concave die
20‧‧‧ outer ring
21‧‧‧Upper outer ring wall
211‧‧‧ buckle
22‧‧‧Chinese and foreign ring walls
23‧‧‧ Lower outer ring wall
230‧‧‧ convex
231‧‧‧Ring flange
232‧‧‧Interference Department
233‧‧‧First upper bevel
234‧‧‧First ridge
235‧‧‧First lower bevel
24‧‧‧ concave optical surface
3‧‧‧ molding cavity

The first figure is an exploded perspective view of a preferred embodiment of the present invention. The second figure is a cross-sectional view of the first figure. The third figure is a combined perspective view of the first figure. The fourth figure is a cross-sectional view of the third figure. The fifth figure is a cross-sectional view of another angle of the third figure.

Claims (12)

A contact lens concave and convex cover mold comprising: a convex mold, an inner ring body and a convex optical surface, wherein the inner ring body is provided with an upper inner ring wall, a lower inner ring wall, and a lower inner ring wall and a lower portion a central inner ring wall between the inner ring walls, the convex optical surface is coupled to the bottom of the lower inner ring wall; a concave die having an outer ring body and a concave optical surface, the outer ring body being provided with an upper outer ring wall a lower outer ring wall, and a middle outer ring wall between the upper outer ring wall and the lower outer ring wall, the concave optical surface being combined at the bottom of the lower outer ring wall; the lower outer ring wall and the concave of the concave die An inner surface of the connecting portion of the optical surface is provided with an annular flange facing the convex optical surface, and the convex optical surface and the periphery of the concave optical surface can be adhered to each other, so that the annular flange contacts the convex optical surface, so that the annular flange contacts the convex optical surface Forming a cavity between the convex optical surface and the concave optical surface via the annular flange; and a joint between the inner ring wall and the convex optical surface under the punch, and the outer ring wall under the die The joints of the concave optical surfaces are combined with each other via the concave-convex structure which is matched with each other. The contact lens concave and convex cover mold according to claim 1, wherein the concave-convex structure comprises: a concave portion, an outer surface of the joint between the inner ring wall and the convex optical surface disposed under the convex mold; and a convex portion The inner surface of the joint between the outer annular wall and the concave optical surface below the female mold is such that the annular flange is positioned between the convex portion and the concave optical surface, and the concave portion can be fitted into and conform to the convex portion. The contact lens concave and convex cover mold according to claim 2, wherein an inner surface of the outer ring wall of the concave die is provided with an interference portion adjacent to the convex portion, and the convex portion is located between the interference portions, the interference The portion can interfere with the movement of the concave portion into and out of the convex portion. The contact lens concave and convex cover mold according to claim 3, wherein the interference portion is provided with a first upper inclined surface and a first lower inclined surface, and the first upper inclined surface and the first lower inclined surface are coupled to form a protruding portion. a first upper inclined surface engaging an inner surface of the inner and outer annular wall, the first lower inclined surface engaging an inner surface of the lower outer ring wall and having a predetermined distance from the annular flange, the concave portion being provided a second upper inclined surface and a second lower inclined surface, and the second upper inclined surface and the second lower inclined surface are coupled to form a protruding second ridge, the second upper inclined surface engaging the outer surface of the lower inner ring wall, The second lower inclined surface engages the convex optical surface, and the second upper inclined surface of the concave portion can closely abut the first lower inclined surface of the interference portion, so that the second ridge portion of the concave portion is embedded in the convex portion. The cover lens concave and convex cover mold according to claim 4, wherein an outer surface of the inner ring wall of the lower punch is provided with a sub-slope adjacent to the second upper inclined surface, and the auxiliary inclined surface and the second upper inclined surface are coupled to each other to form a The concave valley portion, the first upper inclined surface of the interference portion can closely abut the auxiliary inclined surface, and the first ridge portion of the interference portion is embedded in the valley portion. The contact lens concave and convex cover mold according to claim 5, wherein the concave portion, the auxiliary inclined surface and the valley portion are respectively disposed on an outer surface of the inner ring of the convex mold, and the convex portion and the interference portion are respectively annularly disposed on the concave mold. The inner surface of the outer ring. The contact lens concave and convex cover mold according to claim 2, wherein the outer surface of the inner ring wall of the punch is provided with a groove portion, and the lower inner ring wall and the convex optical The outer surface of the surface joint is provided with a plurality of narrow grooves connecting the convex portion and the groove portion. The cover lens concave and convex cover mold according to claim 7, wherein the groove portion is disposed on an outer surface of the inner ring of the convex mold, and the plurality of fine grooves are arranged at intervals on the outer surface of the inner ring of the convex mold. The contact lens concave and convex cover mold according to claim 1 or 2 or 3 or 4 or 5 or 6, wherein an inner surface of the outer ring wall of the female die is provided with a protruding buckle portion on the convex mold The outer surface of the inner ring wall is provided with a concave buckle groove, and the buckle portion can be fitted and positioned in the buckle groove. The cover lens concave and convex cover mold according to claim 9, wherein the buckle ring is disposed on an inner surface of the outer ring of the die, and the buckle groove is disposed on an outer surface of the inner ring of the punch. The contact lens concave and convex cover mold according to claim 1 or 2 or 3 or 4 or 5 or 6, wherein a top ring is provided on the top of the outer ring wall, and the top of the inner ring wall of the punch is provided There is a ring piece, and a shoulder portion of the ring of the punch is placed against the die ring piece. The contact lens concave and convex cover mold according to claim 11, wherein the shoulder ring is disposed on an outer surface of the inner ring of the convex mold.