JPH07137158A - Manufacture of decorative lens made of synthetic resin with embedded decorative object - Google Patents

Abstract

PURPOSE:To embed a decorative object in a lens without causing deviation of the position and direction of the decorative object by setting the decorative object immersed in a resin monomer between first and second rigid molds fitted to a gasket, holding the decorative object covered with jelly-like pieces immersed in the resin monomer between the first and second rigid molds and packing a mold cavity with a resin monomer. CONSTITUTION:A first rigid mold 6 is fitted to a fitting step 3 on one side of a gasket 2 in a mold 1, and a first jelly-like piece 11a immersed in a portion of a resin monomer or in a resin monomer prepared in quality equal thereto is set on the inner face of the first rigid mold 6. A decorative object 12 immersed in the resin monomer is set on the surface of the jelly-like piece 11a. Then, the decorative object is covered with a second jelly-like piece 11b, and they are brought into close contact with each other. A second rigid mold 7 is then fitted to a fitting step 5 on the other side of the gasket 2 to hold the first and second jelly-like pieces 11a, 11b between the first and second rigid molds 6, 7. Then, a protruding piece 10 for operation is pushed and bent to slightly open a mold cavity 9, and the mold cavity 9 is packed with a resin monomer 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manufacturing method for manufacturing a synthetic resin decorative lens having a decorative material embedded therein.

[0002]

2. Description of the Related Art As a manufacturing method for manufacturing a lens made of a synthetic resin in which a decorative material is embedded, for example, Japanese Utility Model Laid-Open No. 1-3068 is used.
What is disclosed in No. 16 is proposed. As shown in FIG. 11, the manufacturing method, prior to forming the mold cavity c between both molds by closely fitting the rigid molds b, b to both end portions of the opening of the tubular gasket a,
After placing the decoration d on an appropriate portion of the inner peripheral surface of the mold cavity to be formed, the resin cavity is filled with the resin monomer and the resin monomer is polymerized and cured, and then both the rigid mold and the gasket By removing the above, for example, a decorative lens e embedded with the decorative object d as shown in FIG. 12 was obtained.

[0003]

However, there are the following problems with such a manufacturing method.

Since the ornament is placed on the inner peripheral surface of the mold cavity, the ornament is offset and embedded in the edge of the lens. As a result, when the eyeglass lens f as shown in FIG. 13 is formed by cutting the lens as required,
A part of the embedding ornament d is cut at the same time and its cut edge g
Will be exposed on the cut surface of the lens. As a result, there is a problem that the decorative effect is diminished, for example, moisture penetrates into the lens through the cut portion g and the decorative portion becomes cloudy. In addition, there is a risk that cracks may occur in the embedding portion of the ornament and the ornament may be chipped off. Further, in the spectacle lens cut in this way, since the embedded ornament is cut at the same time as described above, the original form of the ornament cannot be left as it is.

Especially when the embedded ornament is relatively small, the cut portion of the lens may open, and the embedded ornament may come off. To prevent the ornament from coming off like this when cutting the lens,
As shown in FIG. 14, a through hole h is provided in the ornament d to connect the front and back resins at the through hole h, and a cutting process is performed so as not to destroy the resin connecting part. However, providing a through hole in the decoration in this way
This is not preferable because it may make the decorative portion unnatural.

Since the position of the decoration in the mold cavity is set only by placing the decoration on the inner peripheral surface of the mold cavity, the decoration may be moved by the liquid flow when filling the mold cavity with the resin monomer. The position and orientation were easy to change.
In addition, the decoration may move along with the movement of the resin monomer during the polymerization and curing, so that it is impossible to embed the decoration at a desired position in a desired direction. From this, for example, even if an attempt is made to embed an ornament shaped by initial letters in a predetermined position of the lens in a predetermined direction, it is not possible to predict in which direction and in what direction the initial characters will finally settle. , The work was totally accidental.

The present invention has a technical problem to solve such a problem.

[0008]

In order to solve the above problems, the present invention employs the following means. That is, a method for manufacturing a synthetic resin decorative lens according to the present invention comprises a tubular gasket, a first rigid mold and a second rigid mold which are closely fitted to both ends of the opening with a required space. And a resin monomer prepared as necessary, which is filled in a mold cavity formed by the molding die, and a part of the resin monomer or a resin monomer prepared in the same quality as the resin monomer. A jelly-like piece obtained by polymerizing in a jelly-like shape and a decoration are used. Then, after the first rigid mold is fitted to one end portion of the opening of the gasket, a part of the resin monomer for filling or the same quality as the resin monomer is filled in a required portion of the inner surface portion of the first rigid mold. Place the decoration soaked in the resin monomer prepared in step 3.
The decoration is closely covered with a part of the resin monomer for filling or the jelly-like piece soaked in a resin monomer prepared to have the same quality as the resin monomer, and then the second end of the opening of the gasket is covered with a The second rigid mold is fitted and the jelly-shaped piece is held by the first and second rigid molds. Thereafter, the resin monomer is filled in the mold cavity formed between the first and second rigid molds, and the resin monomer and the jelly-like piece are polymerized and cured so that they are integrated with each other. The decorative lens is obtained by removing the first and second rigid molds and the gasket.

In the manufacturing method, a decorative article dipped in the resin monomer may be closely placed on the surface of the jelly piece.

In addition to the manufacturing method according to the present invention, after the first rigid mold is fitted to one end portion of the opening of the gasket, a plurality of jelly-like pieces dipped in the resin monomer are provided at required portions of the inner surface of the first rigid mold. Are closely placed, and the jelly-like pieces are closely interspersed with the ornaments immersed in the resin monomer, and then the second end is opened at the other end of the gasket. The rigid mold is fitted so that the laminate of jelly-like pieces is sandwiched by the first and second rigid molds, and then the resin is placed in the mold cavity formed between the first and second rigid molds. A monomer is filled, and the resin monomer and the jelly-like piece are polymerized and cured so that both are integrated, and then the first and second rigid molds,
The feature is that the decorative lens is obtained by removing the gasket.

In the above manufacturing method, the ornament soaked in the resin monomer may be closely interposed between the first rigid mold and the jelly piece. In addition, in these manufacturing methods, the decorative object immersed in the resin monomer is
The rigid mold and the jelly-like piece may be closely interposed.

When the manufacturing method according to the present invention uses a plurality of jelly-like pieces, it is constructed as follows, for example. That is, in the manufacturing method, after the first rigid mold was fitted to one end portion of the opening of the gasket, a part of the resin monomer for filling or the same quality as the resin monomer was prepared in a required portion of the inner surface portion. The first jelly-like piece dipped in the resin monomer is placed closely, and at the same time, the ornament dipped in the resin monomer is placed closely on the surface of the jelly-like piece, and the ornament is filled for the filling. Part of the resin monomer or the second jelly piece dipped in the resin monomer prepared to be the same quality as the resin monomer is closely covered, and then the second rigid mold is fitted to the other end of the opening of the gasket. hand,
The first and second jelly pieces are held by the first and second rigid molds, and then the resin monomer is filled in the mold cavity formed between the first and second rigid molds. The resin monomer and the jelly-like piece are polymerized and cured so that they are integrated with each other, and then the first and second rigid molds and the gasket are removed to obtain a decorative lens. .

In the manufacturing method, prior to placing the first jelly-like piece on the inner surface of the first rigid mold, the ornament dipped in the resin monomer is applied to the first rigid mold and the first rigid mold. It may be closely intervened between the jelly pieces. In addition, in these manufacturing methods, a decorative article dipped in the resin monomer may be closely placed on the surface of the second jelly-like piece. In addition, the ornament soaked in the resin monomer may be placed closely on the surface of the second jelly-like piece, and then the ornament may be closely covered with the third jelly-like piece. is there. Further on the surface portion of the third jelly piece,
The decorative article dipped in the resin monomer may be placed closely.

"Closely mounting" in each of the above manufacturing methods,
The term "closely cover" means to place or cover without interposing air bubbles between them.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a molding die 1 used in carrying out the present invention in its usage state. The molding die 1 has a cylindrical gasket 2 formed by using a thermoplastic resin having rubber elasticity to some extent, and a first rigidity in the fitting step portions 3 and 5 provided at both ends of the opening. It is formed by closely fitting the mold 6 and the second rigid mold 7, and a mold cavity 9 matching the lens shape is formed between the first and second rigid molds 6, 7. The first rigid mold 6 and the second rigid mold 7 are formed, for example, as glass molds that form the convex spherical surface and the concave spherical surface of the target lens. The outer surface of the gasket 2 is provided with an operating projection 10 for imparting a partial torsional deformation to the gasket when the mold cavity 9 is filled with the resin monomer.
Is provided.

FIG. 2 shows a jelly-like piece 11 used in the present invention, which is obtained by cutting a jelly-like material obtained by polymerizing a part of a resin monomer, which has been adjusted as necessary, in a jelly-like shape into a desired shape and size. As the resin monomer, among thermosetting resins conventionally used for the production of synthetic resin lenses,
What can be polymerized into a jelly is used. For example, diethylene glycol bisallyl carbonate monomer commercially available under the trade name of CR-39 is suitable because it has very excellent characteristics as a lens material such as distortion and cracks being less likely to occur and having excellent visible light transmittance. is there. The jelly-like material contains such a resin monomer, for example, 50
It is prepared by leaving it for 20 to 30 minutes at a temperature of ° C.

FIG. 3 shows an example of the ornament 12 used in the present invention, which is made of dried flowers. As an ornament,
In addition, it can be formed from various materials such as metal pieces, glass pieces, shell pieces, cloth pieces, and dried flowers, which do not react with the resin monomer or hardly react with them, and the form thereof is also arbitrary.

Using the molding die 1 having the above structure, the resin monomer, the jelly-like piece 11 and the ornament 12,
The process of manufacturing a decorative lens is as follows.

First, the first rigid mold 6 is fitted to the one fitting step portion 3 of the gasket 2 to form an upwardly open dish-like portion shown in FIG. After that, as shown in the same figure, the first jelly-like piece 11a soaked in a part of the resin monomer or a resin monomer prepared to have the same quality as the resin monomer is formed on a desired portion of the inner surface portion of the first rigid mold 6. The jelly-like piece 11b is closely placed on the surface, and the ornament 12 dipped in the resin monomer is also placed on the surface of the jelly-like piece 11b (FIGS. 4 to 4).
5). Then, the second jelly-like piece 11b is placed so as to cover the ornament, and when air bubbles are present between the jelly-like pieces at this time, the covered jelly-like piece is appropriately pressed to remove it. Eliminate and bring the jelly pieces into close contact with each other.

In this way, the decoration is soaked in the resin monomer and interposed between the jelly pieces so that the resin monomer permeates each part of the decoration so that the decoration does not contain air bubbles. This is because. In addition, it is for making it easy to remove the air bubbles present between the jelly-like pieces when the decoration is covered with the resin monomer. Further, the reason why the jelly-like pieces are immersed in the resin monomer is to facilitate the elimination of air bubbles that are present between the jelly-like pieces and the rigid mold or between the jelly-like pieces.

After that, as shown in FIG. 6, a second rigid mold 7 is fitted to the fitting step portion 5 on the other end side of the gasket 2,
The first and second jelly pieces 11a and 11b are the first and second
It is in a state of being elastically held by the rigid molds 6 and 7. The thickness of the first jelly-shaped piece 11a and the thickness of the second jelly-shaped piece 11b are set so that such a holding state can be obtained in consideration of the thickness of the ornament interposed therebetween. As a result of the first and second jelly pieces being sandwiched by the first and second rigid molds, the ornament is fixed in position while being sandwiched between the jelly pieces.

Thereafter, for example, the operating projection 10 is elastically pressed and bent to give the gasket 2 a partial torsional deformation,
With the mold cavity 9 slightly open, an injection needle (not shown) is inserted into the opening, and the resin monomer 13 is injected into the mold cavity 9 and filled. FIG. 1 shows a state in which the mold cavity 9 is filled with the resin monomer 13. In this state, when the resin monomer and the jelly-like piece are heated so as to be integrated with each other, the polymerization proceeds in a state where the ornament is still fixed in position,
The polymerization is completed without changing the arrangement state of the ornament. The polymerization and curing may be performed, for example, at room temperature to about 95 ° C. for 14 to 1
It is done gradually over 7 hours. After that, when the first and second rigid molds 6 and 7 and the gasket 2 are removed, the decorative lens 15 in which the ornament 15 is embedded in the desired arrangement as shown in FIG. 7 is obtained.

In this case, prior to disposing the first jelly-like piece 11a on the inner surface portion of the first rigid mold 6, the decoration 12 dipped in the resin monomer is placed on the inner surface portion of the first rigid mold 6. Of the second jelly-like piece 11b, and the ornament 12 dipped in the resin monomer may be closely placed on the surface of the second jelly-like piece 11b (FIG. 6). As described above, when the ornament is placed on the inner surface of the first rigid mold 6 or the surface of the second jelly-like piece 11b, the ornament 12 is applied to the first rigid mold 6 and the second rigid mold 11. Although it comes into contact with the mold 7, since the entire surface of the ornament is covered with the resin monomer, there is almost no danger of exposing the ornament.

FIG. 8 shows a decorative article in which the jelly-like piece 11 (which is dipped in the resin monomer) is formed into a layer, and the jelly-like piece 11 is dipped in the resin monomer between the first rigid mold 6 and the jelly-like piece 11. A state in which the jelly-like piece 11 is sandwiched between the first and second rigid molds 6 and 7 after interposing 12 is shown. In this case, the ornament 12 soaked in the resin monomer may be further closely placed on the surface of the jelly-like piece 11.

FIG. 9 shows a first jelly-like piece 11 having three layers of jelly-like pieces (those dipped in the resin monomer).
a and the second jelly-like piece 11b, and between the second jelly-like piece 11b and the third jelly-like piece 11c, respectively, the ornament 12 immersed in the resin monomer is interposed, The state where the jelly-like piece is sandwiched between the first and second rigid molds 6 and 7 is shown. In this case, in the same manner as described above, the resin monomer is added between the first rigid mold 6 and the first jelly-like piece 11a and between the third jelly-like piece 11c and the second rigid mold 7. The dipped ornament 12 may be interposed. In this case, when a transparent colored sheet of three primary colors is used as the ornament, the obtained decorative lens is
It becomes rich in fashion, with colors changing depending on the viewing angle.

FIG. 10 shows a state in which the jelly piece 11 is sandwiched between the first and second rigid molds 6 and 7 after the cut provided in the jelly piece 11 is opened and the ornament 12 is pushed in. The jelly-like pieces are in two layers, upper and lower.

In each of the above cases, a plurality of ornaments may be arranged side by side at required intervals.

[0029]

The present invention has the following excellent effects. Since the manufacturing method according to the present invention fixes the position of the ornament in the mold cavity by sandwiching the ornament between the jelly piece and the rigid mold or between the jelly pieces, the position and the direction of the ornament Can be set as desired and fixedly placed in the mold cavity. For this reason, any form of ornamental ornaments, including ornaments with initial letters, is embedded as desired by setting the desired position and orientation in the mold cavity. be able to.

Further, the ornament is dipped in the resin monomer before being placed on the inner surface of the rigid mold or the surface of the jelly piece. Therefore, there is almost no possibility that the resin monomer permeates the decorations and encloses air bubbles. Also, the jelly-like piece is immersed in the resin monomer in advance.
Therefore, when the jelly piece is covered on the ornament,
Since the resin monomer is present between the decoration and the jelly-like piece or between the jelly-like pieces, by appropriately pressing the jelly-like piece, etc., between the jelly-like piece and the rigid mold or between the jelly-like pieces. Easy to eliminate the intervening bubbles.

In the production method according to the present invention, the same resin monomer adjusted as necessary is used for filling the mold cavity, forming jelly-like pieces, immersing ornaments and dipping jelly-like pieces. In order to use it by dividing it into four kinds of applications, or to use a resin monomer prepared in the same quality as the resin monomer as a resin monomer used for forming jelly pieces, dipping decorations and dipping jelly pieces By polymerizing and curing the resin monomer, a decorative lens with uniform quality can be manufactured.

Since the ornament can be fixed at any position in the mold cavity, even if the manufactured decorative lens is cut, the entire ornament can be cut without causing a situation in which a part of the ornament is cut at the same time. You can leave it as it is.

When the manufactured decorative lens is used as a spectacle lens, the above-mentioned problem caused by exposing the cut of the decoration by leaving the whole of the decoration in this manner, that is, moisture from the cut. It is possible to solve at once the problems such as the reduction of the decorative effect due to the intrusion of the, the problem that the decorative portion is missing, and the problem that the decorative object comes out during the cutting process. Further, unlike the conventional manufacturing method, it is not necessary to provide a through hole in the ornament for the purpose of connecting the resin on the front and back sides, and therefore there is no fear that the decorative effect is reduced by the through hole. Further, since only the lens can be cut without cutting the ornament, the cutting work can be stably and efficiently performed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view illustrating a manufacturing method of the present invention.

FIG. 2 is a perspective view illustrating a jelly piece.

FIG. 3 is a plan view showing an ornament.

FIG. 4 is a cross-sectional view showing a state in which a jelly-shaped piece sandwiching an ornament is placed on the inner surface portion of the first rigid mold fitted to the gasket.

FIG. 5 is a plan view showing a state where an ornament is placed on the first jelly-like piece.

FIG. 6 is a cross-sectional view showing a state in which a jelly-shaped piece sandwiching an ornament is sandwiched by both rigid molds.

FIG. 7 is a front view illustrating a decorative lens.

FIG. 8 is a cross-sectional view showing a state in which a jelly-like piece is formed in a single layer, an ornament is interposed between the rigid mold and the jelly-like piece, and the ornament is sandwiched between the rigid molds.

FIG. 9 is a cross-sectional view showing a state in which three layers of jelly-like pieces sandwiching an ornament are sandwiched between rigid molds.

FIG. 10 is a cross-sectional view showing a state in which a cut provided on a jelly piece is opened, an ornament is pushed in, and the ornament is sandwiched between rigid molds.

FIG. 11 is a cross-sectional view illustrating a conventional method of manufacturing a decorative lens.

FIG. 12 is a plan view illustrating a conventional decorative lens.

13 is a perspective view illustrating a problem of a spectacle lens formed by cutting the decorative lens shown in FIG.

FIG. 14 is a partial cross-sectional view illustrating a conventional decorative lens in which resin on the front and back sides is connected to each other through a hole provided in a decoration.

[Explanation of symbols]

 1 Mold 2 Gasket 6 First Rigid Mold 7 Second Rigid Mold 9 Mold Void 11 Jelly-like Piece 12 Ornament

Claims (10)

[Claims] 1. A molding die comprising a tubular gasket, a first rigid mold and a second rigid mold which are closely fitted to both end portions of the opening thereof at a required interval, and the molding die. A jelly-like piece obtained by polymerizing the resin monomer prepared in a desired manner, which is filled in the mold cavity to be formed, and a part of the resin monomer or a resin monomer prepared in the same quality as the resin monomer, into a jelly form. And a decoration, the first rigid mold is fitted to one end of the opening of the gasket, and then one of the resin monomers for filling is filled in a desired portion of the inner surface of the first rigid mold. Part or a decoration soaked in a resin monomer prepared in the same quality as the resin monomer is placed closely, and the decoration is a part of the resin monomer for filling or a resin monomer prepared in the same quality as the resin monomer Soaked in A state in which the jelly-like piece is closely covered with the jelly-like piece, and then the second rigid mold is fitted to the other end portion of the opening of the gasket, and the jelly-like piece is held by the first and second rigid molds. And then the first and second
Mold cavity formed between the rigid molds is filled with the resin monomer, and the resin monomer and the jelly-like piece are polymerized and cured so that both are integrated, and then the first and second rigidity are obtained. A method for producing a synthetic resin decorative lens, characterized in that a decorative lens is obtained by removing a mold and a gasket. 2. The method for producing a synthetic resin decorative lens according to claim 1, wherein a decoration dipped in the resin monomer is further closely placed on the surface of the jelly-like piece. A method for manufacturing a resin decorative lens. 3. A molding die comprising a tubular gasket, a first rigid mold and a second rigid mold which are closely fitted to both end portions of the opening thereof at required intervals, and the molding die. A jelly-like piece obtained by polymerizing the resin monomer prepared in a desired manner, which is filled in the mold cavity to be formed, and a part of the resin monomer or a resin monomer prepared in the same quality as the resin monomer, into a jelly form. And a decoration, the first rigid mold is fitted to one end portion of the opening of the gasket, and then a part of the resin monomer for filling or the resin monomer is added to a required portion of the inner surface of the gasket. Part of the resin monomer for filling or the resin monomer is placed in a state in which a plurality of jelly-like pieces dipped in a homogenously prepared resin monomer are closely placed, and between the jelly-like pieces. Prepared to the same quality as After placing the ornament soaked in the resin monomer in close contact, a second rigid mold is fitted to the other end of the opening of the gasket, and the laminate of jelly-like pieces is formed by the first and second rigid molds. After being held, the mold cavity formed between the first and second rigid molds is filled with the resin monomer, and the resin monomer and the jelly-like piece are polymerized and cured so that both are integrated. Then, after that, the decorative lens is obtained by removing the first and second rigid molds and the gasket to obtain a decorative lens. 4. The method for manufacturing a synthetic resin decorative lens according to claim 3, wherein the decorative article immersed in the resin monomer is closely interposed between the first rigid mold and the jelly-like piece. Method for manufacturing a synthetic resin decorative lens. 5. The method for producing a synthetic resin decorative lens according to claim 3, wherein the decorative article immersed in the resin monomer is closely interposed between the second rigid mold and the jelly piece. A method for manufacturing a synthetic resin decorative lens, comprising: 6. A molding die comprising a tubular gasket, a first rigid mold and a second rigid mold which are closely fitted to both end portions of the opening thereof at a required interval, and the molding die. A jelly-like piece obtained by polymerizing the resin monomer, which has been prepared as required, to be filled in the mold cavity to be formed and a part of the resin monomer or a resin monomer prepared in the same quality as the resin monomer, into a jelly form. And a decoration, the first rigid mold is fitted to one end portion of the opening of the gasket, and then a part of the resin monomer for filling or the resin monomer is added to a required portion of the inner surface of the gasket. The first jelly-like piece immersed in the resin monomer prepared to be homogeneous was placed closely, and a part of the resin monomer for filling or the same quality as the resin monomer was prepared on the surface portion of the jelly-like piece. Immerse in resin monomer The decorated ornament is placed closely, and the ornament is intimately contacted with the second jelly-like piece in which the ornament is immersed in a part of the resin monomer for filling or a resin monomer prepared to have the same quality as the resin monomer. Then, a second rigid mold is fitted to the other end portion of the opening of the gasket so that the first and second jelly pieces are sandwiched by the first and second rigid molds, and then The mold cavity formed between the first and second rigid molds is filled with the resin monomer, and the resin monomer and the jelly-like piece are polymerized and cured so that both are integrated, and then the first A method for producing a synthetic resin decorative lens, characterized in that the decorative lens is obtained by removing the second rigid mold and the gasket. 7. The method for manufacturing a synthetic resin decorative lens according to claim 6, wherein the first rigid mold has a first surface on the inner surface.
Prior to placing the jelly-like piece of 1., a decorative resin dipped in the resin monomer is closely interposed between the first rigid mold and the first jelly-like piece. Manufacturing method of decorative lens. 8. The method for manufacturing a synthetic resin decorative lens according to claim 6 or 7, wherein the ornament immersed in the resin monomer is closely placed on the surface of the second jelly piece. And a method for manufacturing a synthetic resin decorative lens. 9. The method for manufacturing a synthetic resin decorative lens having the ornament according to claim 8 embedded therein, wherein the ornament immersed in the resin monomer is closely placed on the surface portion of the second jelly piece. A method for manufacturing a synthetic resin decorative lens, characterized in that, after the placement, the third jelly-shaped piece dipped in the resin monomer is placed closely so as to cover the decoration. 10. The method for manufacturing a synthetic resin decorative lens according to claim 9, wherein the decoration soaked in the resin monomer is closely placed on the surface of the third jelly piece. And a method for manufacturing a synthetic resin decorative lens.