JPH01306230A - Gasket for manufacturing systhetic resin decorative glass lens for cutting process - Google Patents

Abstract

PURPOSE:To manufacture a synthetic resin decorative lens efficiently by setting and fixing a rigid mold in the front and a rigid mold on the rear side on mold fixing walls on the front and rear of a gasket respectively and providing a projection for operation on the outside surface. CONSTITUTION:A gasket 1 is formed with a rubber elastic material, and rigid molds 5 and 6 are fitted and fixed on mold fixing walls 10 and 11, and a decorative piece 23 in the state that its central section inside is accommodated in a lens space 27 is clamped between a decorative piece clamping section 25 of the rigid mold 5 and fixed therein, and then the lens space 27 is in the state of opening at its upper side by pressing and deforming the projection 26 for operation and twist deforming a projecting opening section 20 of the gasket 1. Then, resin monomer 35 is injected and filled therein, and the resin monomer 35 is then perfectly filled and sealed by returning the projecting piece 26 for operation to the free state. The resin monomer 35 is polymerized and cured in said state, and rigid molds 5 and 6 and the gasket 1 are removed and the protruding decorative piece is cut off to manufacture a decorative glass lens.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a gasket that enables efficient and inexpensive production of decorative eyeglass lenses made of synthetic resin for high value-added cut processing in which decorative pieces are embedded. It is something.

(Prior Art and Problems to be Solved by the Invention) With the diversification of eyeglass fashion in recent years, various attempts have been made to add design changes to eyeglasses. However, in the past, it was common practice to decorate eyeglass frames or provide decorations on eyeglass frames, but little consideration was given to the design of the lenses themselves.

Some fashion lenses have been proposed in which a pattern is formed by printing or cloisonné on the surface of the lens after the lens molding process, but the printing process requires a lot of effort and costs are high. Not only does this lead to an increase in
There was a problem that the formed pattern part might peel off, resulting in poor durability. In addition, the pattern formed tends to be flat, and the gloss of the lens surface may become t-shaped, which limits the decorative effect.

In some cases, a screw shaft protruding from the back side of the decorative piece is inserted into a screw insertion hole drilled in a desired part of the lens, and then a nand is screwed onto the screw shaft to attach the decorative piece to the lens. Fixed fashion lenses have also been proposed, but manufacturing costs are high because many processing steps are required to form the decorative part, such as machining the decorative piece, drilling screw holes, and attaching the decorative piece. In addition to the problem of an increase in the amount of metal, there was also a risk of cracking in the screw insertion hole during processing, which caused problems with the stability of the decorative part. Furthermore, since it is necessary to attach the screw shaft to the decorative piece, the types of decorative pieces that can be used are limited, and there is also a limit to the decorative effect.

The present invention has been made in view of these conventional problems, and satisfactorily meets the diversified demand for eyeglass fashion in recent years, and provides a synthetic resin material for cutting that is easy to cut. The object of the present invention is to provide a gasket that enables decorative eyeglass lenses to be manufactured efficiently and at low cost.

(Means for Solving the Problems) In order to solve the above problems, the present invention employs the following means. That is, a gasket (hereinafter referred to as a gasket) 1 for manufacturing a decorative eyeglass lens made of synthetic resin for cut processing according to the present invention is made entirely of a rubbery elastic material, and has a circular plate-shaped partition wall 3 that is made of a rubber-like elastic material. While hollowing out the opening, mold fixing walls 10.11 are provided around the front and back sides of the peripheral edge portion of the partition wall 3 for fitting and fixing the peripheral edge of the rigid mold 5 on the front side or the rigid mold 6 on the back side,
In a state where the front and back rigid molds 5.6 are fitted and fixed, the entire front and back peripheral edge portions 12.13 of the lens opening 2 are covered with the inner surface 1 of the corresponding front and back rigid molds 5.6.
5.16, and a lens cavity 27 between the rigid molds 5 and 6 can be formed in the lens opening portion 2, and the lens opening 2 is slightly expanded in the left and right direction. A protruding opening 20 extending toward the inner surface of the mold fixing wall such that the tip thereof is close to the inner surface of the mold fixing wall is provided in a row at a suitable portion of the periphery of the main opening 17 having a long symmetrical flat circular shape, and the lens side peripheral surface 21 of the opening for
In addition, mark portions 22 as mark protrusions or mark recesses arranged at required intervals are provided symmetrically, and between the periphery of the main opening 17 and the mold fixing wall, there is a rigid wall fitted into the mold fixing wall. A decorative piece clamping part 25 cooperates with the mold to clamp a part of the decorative piece 23, and an operating protrusion 26 is provided on the outer surface of the mold fixing wall at a portion facing the protruding opening 20. It is characterized by a protruding structure.

(Function) However, the mold fixing walls 10 on the front and back sides of the gasket 1.
When the rigid mold 5 on the front side and the rigid mold 6 on the back side are respectively fitted and fixed into the lens opening 2, a lens cavity 27 is formed between the front and back rigid molds 5 and 6 in the lens opening 2 portion. . With the decorative piece 23 housed in the lens cavity 27 and the protruding opening 20 positioned in the housewife position, the operating protrusion 26 is pushed and bent a little, and the protruding opening 20 portion of the gasket 1 is partially deformed. When the injection opening 33 is formed in this manner, the resin monomer 35 enters the lens cavity 27 from the injection opening 33 formed in this manner.
The scales will be filled with water. When the operating protrusion 26 is returned to the free state after being filled with the resin monomer, the entire peripheral edge portions 12 and 13 of the front and back sides of the lens opening 2 are again connected to the corresponding rigid molds on the front and back due to the elastic action of the gasket 1. 5 and 6, and the lens cavity 27 is completely filled with the resin monomer 35 and sealed, as shown in FIG. Note that if air bubbles remain in the lens cavity 27, the air bubbles gather at the protruding opening portion 47. Note that the mark portion 22 provided on the side peripheral surface 21 of the lens cavity 27
By aligning the decorative pieces using This makes it easy to manufacture decorative eyeglass lenses.

(Example) Embodiments of the present invention will be described below based on the drawings.

1 and 2, a gasket 1 of the present invention is used for manufacturing a synthetic resin decorative eyeglass lens for cut processing (hereinafter referred to as a decorative eyeglass lens), and is entirely made of a rubbery elastic material. On the front and back of the peripheral part of the partition wall 3 formed by hollowing out the lens opening 2,
Mold fixing walls io and xi are provided around the periphery for tightly fitting and fixing the peripheral edge 7.9 of the rigid mold 5 on the front side or the rigid mold 6 on the back side, and the mold fixing walls 10.1
In a state in which the front and back rigid molds 5 and 6 are fitted and fixed to the lens opening 2, the front and back peripheral portions 12.1 of the lens opening 2 are fixed.
3 is configured so that it can come into close contact with the inner surface portions 15.16 of the corresponding front and back rigid molds 5.6. The lens opening 2 is located at the upper edge of the main opening 17, which has a symmetrical oblate circular shape with a long top in the left-right direction (when filling the lens cavity 27 with the resin monomer 35, which will be described later). For example, a trapezoidal protruding opening 2o extending toward the inner surface 19 of the mold fixing wall so that the tip 18 is close to the inner surface 19 of the mold fixing wall is continuously provided at the central portion (main opening edge). On the side circumferential surface 21 of the lens opening 2, there are mark portions 2 as protrusions or recesses (protrusions in FIG. 1) lined up at required intervals.
2 are provided symmetrically. Further, between the periphery of the main opening 17 and the mold fixing wall, a decorative piece 23 is sandwiched between the peripheral edge of the main opening 17 and the mold fixing wall in cooperation with the rigid mold fitted into the mold fixing wall (see FIG. 4). At the same time as the attachment part 25, a rectangular plate-shaped operating protrusion 26 is protrudingly provided on the outer surface of the mold fixing wall at a portion facing the protruding opening 20.

The procedure for manufacturing a decorative eyeglass lens using the gasket 1 having such a structure will be explained with reference to FIGS. 2 to 5. first,
The rigid mold 5 on the front side and the rigid mold 6 on the rear side are fitted and fixed into the mold fixing walls 10 and 11 on the front and back sides of the gasket 1, respectively, and a lens cavity is formed between the front and back rigid molds 5° and 6 in the lens opening 2 portion. Prior to forming the space 27, as shown in FIG. And the central outer part 31 (a part of the decorative piece) is sandwiched between the decorative piece clamping part 25 as the peripheral part of the lens cavity of the partition wall 3 and the rigid mold 5 so that the decorative piece 23 is in a stretched state. (see FIGS. 3 and 4), and when setting the decorative piece clamping part 25 on the concave side of the partition wall 3 as shown in FIG.
Even when the decorative piece 23 is thin and has poor shape fixation, the entire central inner portion 29 of the decorative piece 23 existing in the lens cavity 27 is attached to the convex surface of the rigid mold 5 that is fitted into the concave side. It rests on the portion 32 and is in a slightly curved state, thereby allowing the decorative piece existing within the lens cavity 27 to become stretched by itself. Furthermore, when placing the decorative piece 23 into the lens cavity 27, the positioning of the decorative piece 23 is performed using the mark portions 22 provided symmetrically (as shown by solid lines in FIG. 3). (or by positioning the decorative piece 23 as shown by the dashed line in the figure), the decorative piece 23 can be placed in a preset position within the lens cavity 27. After fixing the decorative piece 23 in this manner, as shown in FIG. When the portion 20 is partially torsionally deformed, the lens cavity 27 opens upward at the protruding opening 20 portion. An injection needle (not shown) is inserted into the injection opening 33 thus formed, and a resin monomer (for example, diethylene glycol bisallyl carbonate monomer commercially available under the trade name CR-35) 3 is inserted.
5 is injected and filled into the lens cavity 27, the resin upper tabs on the front and back sides of the decorative piece 23 become connected at the resin joint 36 as a cloth pattern (see FIG. 2).

When the operating protrusion 26 is returned to the free state after filling the resin top, the entire peripheral edge portions 12 and 13 of the front and back sides of the lens opening 2 are
Again, the inner surfaces 15 of the corresponding front and back rigid molds 5.6
．． 16, and the lens cavity 27 is in close contact with the second
As shown in the figure, the resin monomer 35 is completely filled and sealed. In addition, if air bubbles remain in the lens cavity 27, the air bubbles will gather at the protruding opening portion 47 as shown in FIGS. After the monomer 35 is polymerized and cured, the front and back rigid molds 5.6 and gasket 1 are removed, and the decorative piece 38 (see FIG. 6) protruding from the lens main body 37 is cut out, as shown in FIG. 7. A decorative eyeglass lens 39 such as the one shown in FIG. FIG. 8 is an explanatory diagram for explaining both the decorative eyeglass lenses formed by the above-mentioned decorative eyeglass lenses.The decorative eyeglass lenses 39 thus formed are provided with a decorative portion 40 as shown in FIG. A cut spectacle lens 41 can be manufactured.

FIG. 9 shows another example of a decorative eyeglass lens 39 manufactured using the gasket according to the present invention, in which a decorative body 43 in the shape of a small disk with a through hole 42 provided in the center is shown. A plurality of flexible decorative pieces 23 are integrated with a connecting string 45 so that the decorative pieces can be bent to each other.
6 along the curve, so that the resin on the front and back sides of the decorative piece 23 is connected at the resin joint part as a large number of micro holes in the through hole 42 of the decorative body 43 and the joint string 45. be. When manufacturing the decorative eyeglass lens 39, the end portions 48, 48 (parts of the decorative piece) of the connecting string 450 are held between the decorative piece clamping part 25 of the gasket 1 and the rigid mold 5, as shown in FIG. Pinched decorative piece 23
Fix the position. In addition, both end portions of the splice string 48.48
is removed after the lens is manufactured.

(Effects of the Invention) (1) When the gasket of the present invention is used, the following decorative eyeglass lenses with excellent fashionability, workability, and economical efficiency are provided. Specifically, (a) a decorative eyeglass lens is provided that includes a decorative portion with a rich three-dimensional effect by embedded decorative pieces.

(b) Because the decorative piece is embedded, unlike conventional eyeglass lenses in which decorative parts are formed by printing or cloisonné on the lens surface, other conditions such as gloss on the lens surface are Not only is it exactly the same as the original, but there is no risk of damage to the decorative part.

(c) Since the gasket of the present invention has a decorative piece binding part, even if it is a decorative piece made of a flexible material in the form of a sheet or string, it can be embedded with a good appearance in the stretched state. Therefore, decorative pieces made of various materials can be used, and the decorative effects of decorative eyeglass lenses can be diversified.

(d) A cut spectacle lens can be manufactured by cutting a decorative spectacle lens manufactured using the gasket of the present invention, but when performing the cutting process, it is necessary to determine what kind of decorative part the spectacle lens has. Depending on which decorative piece is used, where on the cut eyeglass lens the decorative piece is placed, and how much of the decorative piece is incorporated into the cut eyeglass lens, completely different cut eyeglass lenses can be produced. Therefore, individualized fashion lenses that meet the needs of consumers will be provided.

For this reason, it can be said that the gasket of the present invention contributes to the provision of eyeglasses with a novel design that cannot be obtained simply by adding design changes centered on the eyeglass frames as in the past.

(e) The shape of the lens main body in the decorative eyeglass lens manufactured by the gasket of the present invention is a flat circular shape long in the left-right direction, and is close to the shape of a cut eyeglass lens.
It is convenient for the cutting process, as it does not put strain on the blade and only requires a small amount of cut.When the decorative eyeglass lens is a prescription lens, it is convenient for the cutting process. A cut mark part, which is a recess or a protrusion, formed by a mark part, which is a protrusion or a recess, provided on the side peripheral surface of the opening can be used for determining the optical center. Furthermore, the fact that the manufactured decorative IlI mirror lens has a shape that requires less cutting processing results in a reduction in the amount of resin monomer required to manufacture decorative eyeglass lenses, which reduces manufacturing costs. It is also a good idea to try to reduce it.

(2) When the gasket of the present invention is used, it is possible to efficiently manufacture a high-quality decorative eyeglass lens with an excellent decorative effect. Specifically, (a) when using the gasket of the present invention, after filling the resin monomer with the decorative piece fixed in the lens cavity formed by fitting and fixing rigid molds on the front and back sides of the gasket, By polymerizing and curing the resin monomer and removing the rigid mold and gasket, decorative eyeglass lenses with excellent decorative effects can be easily produced.

(b) The gasket of the present invention has a decorative piece clamping part that clamps a part of the decorative piece in cooperation with the rigid mold fitted into the mold fixing wall, so that the gasket has a sea (.) shape or a string shape. Even if the decorative piece is made of a flexible material, it can be stably placed in the lens cavity in a stretched state.

(c) Since the gasket of the present invention has mark portions lined up at required intervals symmetrically on the side peripheral surface of the lens opening, by aligning the decorative piece using the mark portions,
The decorative pieces can be stored in a preset position in the lens cavity, and a pair of decorative eyeglass lenses in which the decorative pieces are embedded in a bilaterally symmetrical state can be easily manufactured.

(D) The gasket of the present invention has a protruding opening whose tip is close to the inner surface of the mold fixing wall, which is connected to the main opening to form a lens opening, so that the operating protrusion is pushed a little. By bending, an opening for injection into the resin can be formed, and injection work can be easily performed.

Further, since the torsional deformation of the gasket that occurs when the operating protrusion is pressed and bent is small, there is no risk of destabilizing the decorative piece fastening portion due to the pushing and bending of the operating protrusion.

In addition, since a protruding opening is connected to the main opening for forming the lens part necessary for manufacturing cut eyeglass lenses, even if air bubbles remain in the lens cavity when resin monomer is injected, , the air bubbles become scales that are collected in the protruding opening portion that does not interfere with the production of cut spectacle lenses, making it possible to manufacture decorative spectacle lenses of excellent quality.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the gasket according to the present invention, Fig. 2 is a cross-sectional view showing its usage state, and Fig. 3 shows a marking section provided on the side circumferential surface of the lens opening. FIG. 4 is a perspective view showing a state in which a part of the decorative piece is clamped between the decorative piece clamping part and the rigid mold, and FIG. 5 is a perspective view showing how to position the decorative piece using the lens. FIG. 6 is a perspective view showing the state when the resin monomer is injected into the cavity, FIG. 6 is a front view showing the decorative piece protruding from the lens main body, and the seventh concave is a decorative eyeglass lens manufactured using the gasket of the present invention. FIG. 8 is a front view showing a cut eyeglass lens formed by applying cart processing to the decorative eyeglass lens shown in FIG. 7, and FIG. FIG. 10 is a front view showing another example of the manufactured decorative eyeglass lens. When manufacturing the decorative eyeglass lens shown in FIG. It is a front view showing the state where it is sandwiched between. 1... Gasket, 2... Lens opening, 3...
- Partition wall, 5.6... Rigid mold, 17... Main opening, 20... Projection opening, 22... Marker, 25.
...Decorative piece clamping part, 26...Protrusion piece for operation, 27...
Lens blank space. Patent applicant: Matsuba Megane Kogyo Co., Ltd. Agent: Patent attorney Kiyoshi Okamoto Figure 4 Figure 2 I! 1 Figure 1 Figure 3 Figure t5 Figure 6 Koma Figure 7

Claims (1)

[Claims] The partition wall 3 is entirely made of rubbery elastic material and has a circular plate shape.
A lens opening 2 is hollowed out in the partition wall 3, and mold fixing walls 10 and 11 are provided around the front and back sides of the peripheral edge portion of the partition wall 3 for fitting and fixing the peripheral edge of the rigid mold 5 on the front side or the rigid mold 6 on the back side. Rigid mold 5 on the front and back
, 6 are fitted and fixed, the entire front and back peripheral edge portions of the lens opening 2 are in close contact with the inner surfaces 15, 16 of the corresponding front and back rigid molds 5, 6,
In addition, a lens cavity 27 between the rigid molds 5 and 6 can be formed in the lens opening portion 2, and the lens opening 2 has a symmetrical oblate circular shape slightly elongated in the left-right direction. A protruding opening 20 is provided in a suitable position on the periphery of the main opening 17, and the protruding opening 20 extends toward the inner surface 19 of the mold fixing wall so that the tip thereof is close to the inner surface 19 of the mold fixing wall;
On the side circumferential surface 21 of the lens opening, mark parts 22 as mark protrusions or mark recesses arranged at required intervals are provided symmetrically, and between the periphery of the main opening 17 and the mold fixing wall. , a decorative piece clamping part 25 that clamps a part of the decorative piece 23 in cooperation with the rigid mold fitted into the mold fixing wall;
To manufacture a decorative eyeglass lens made of synthetic resin for cut processing, characterized in that a protruding piece 26 for operation is provided on the outer surface of the mold fixing wall at a portion facing the protruding opening 20. gasket for.