JP3139153U - Mold injection structure for optical lens manufacturing - Google Patents

Abstract

[PROBLEMS] To improve accuracy in an injection operation of mold injection molding of an optical lens.
In an injection molding apparatus including a lens molding mold between a male mold cover and a female mold cover, a ball shaft cover and an injection insertion portion are installed in the male mold cover, and an injection insertion portion is provided. Is an integral structure of a mold piston 341 for extruding a molded lens, a pad 343, and a support rod 342, and a buffer portion 3421 having one or more diameters is provided on the support rod to give the entire support rod flexural elasticity.
The misalignment of each support rod that occurs during the forward movement of the support rod for the lens injection operation during the mold opening operation is corrected by the deflection of the buffer portion of the support rod, and the front end of the injection insertion portion is corrected. Can be kept vertical.
[Selection] Figure 3

Description

  The present invention relates to a mold injection structure for manufacturing an optical lens, and in particular, a buffer portion is installed on a support rod on an injection insertion portion of the injection structure, and the buffer portion increases the elasticity of the support rod and depends on a mold operation. The buffer structure of the support rod suppresses and compensates for the disadvantage of the inclined side of the injection structure, so that the front end of the injection insertion portion is kept vertical, and at the same time, the length of the support rod is extended, and the support rod is integrally molded. The support rod is directly fixed on the lower mold, thereby solving the cumulative tolerance, which is a drawback of the known structure, and a mold injection structure for manufacturing an optical lens that greatly improves the yield rate and precision of the optical lens.

  Taiwan Patent Gazette, Application No. 095219613 “Mold injection structure in optical lens manufacturing” is composed of a male mold base, a ball shaft cover installed there, and a mold piston. The mold piston and the ball shaft cover have a column shape and are in axial contact with each other in the male mold base round hole. Further, a plurality of round steel balls are installed in the ball shaft cover portion, and one side of the ball shaft cover is cut through the round steel ball and the inner wall of the male mold base. The other side of the ball shaft cover is also cut into each other through the round steel ball and the outer ring wall of the mold piston. The molding part at one end of the mold piston and the flat part of the male mold base are also cut into each other, and further correspond to the molding part and the flat part of the female mold base. One molding part and a plane part are installed in the female mold base, and the molding part and the plane part correspond to the molding part and the plane part of the male mold base, and form a mold hole structure.

  The above-mentioned “mold injection structure in optical lens manufacturing” is a non-gap sliding injection operation because the ball shaft cover in the male mold base and the mold piston ring wall are in close contact with each other without gaps. In this case, the occurrence of lens bias and distortion is eliminated.

  As shown in FIG. 1, when applying the injection structure 13 of the above-mentioned patent on the mold 1, the female mold table 14 is installed in the upper mold 11, and the male mold table 15 is installed in the lower mold 12. A mold hole portion 16 having a specific shape is formed between the female mold table 14 and the male mold table 15, and a liquid lens body material is injected into the mold hole portion 16 to be constant under a specific pressure and temperature. Mold after time. Subsequently, the upper mold 11 and the lower mold 12 are separated, that is, an opening mold operation is performed, and then the fitting portion 171 is moved upward by the injection template 17 in the lower mold 12, and the fitting portion 171 is a fixed component 172. To fix the support rod 131 of the injection structure 13 to each other. For this reason, the support rod 131 of the injection structure 13 also moves upward, and further moves upward in the ball shaft cover 133 by the mold piston 132 to inject the molded body in the mold hole 16. This is the demolding operation.

  The injection structure 13 must be used with the fitting part 171 and the support rod 131 fixed to each other by a fixing part 172. Further, since the support rod 131 and the fitting portion 171 are manufactured in separate manufacturing processes, an error occurs during the manufacturing process of the support rod 131. An error also occurs during the manufacturing process of the fitting portion 171. Therefore, when the support rod 131 and the fitting portion 171 are assembled and used, errors of the two main bodies overlap each other, and so-called cumulative tolerance occurs. This accumulated tolerance makes it easier to scratch the optical lens that has been manufactured when the injection structure 13 emits the optical lens, and at the same time, it becomes difficult to grasp the precision of the manufacturing process of the optical lens, thereby reducing the yield rate of the optical lens. End up. Further, when the mold is operated, the distance of back and forth movement of the injection structure 13 is not uniform due to pressure or other machines. For example, although the advancement of the injection structure 13 is one unit, the other injection structure 13 is advanced by 0.9 due to an error. There is only a unit, and an error of 0.1 unit occurs in both. Further, the mold piston 132 movable in the male mold table 15 is inclined to one side, the front end of the mold piston 132 and the male mold table 15 are damaged by friction with each other, and the optical lens emitted from the injection structure 13 is also wrinkled, The yield rate of products is low.

Therefore, it is an object of the present invention to provide a mold injection structure in the production of an optical lens having no accumulated tolerance and having elasticity, excluding the above-mentioned drawbacks.
Taiwan patent application proposal No. 095219613 JP 2002-67112 A

  Problems to be solved are that tolerances accumulate, accuracy is difficult to grasp, low yield rate is low, and when the injection structure is inclined to one side, the mold piston and male mold cover are rubbed against each other and damaged. .

  The present invention includes a male mold cover and a female mold cover. Among them, a ball shaft cover and an injection insertion part are installed in the male mold cover, and the injection insertion part is configured as an integral structure from a mold piston, a pad and a support rod, and one or more buffering portions are provided on the support rod. Install. The female mold cover is installed corresponding to the male mold cover. The shock absorber installed on the support rod gives the entire support rod bending elasticity, and the defect of the inclination to one side of the injection insertion portion caused by the mold operation is corrected by the deflection of the buffer portion of the support rod. The main feature is to keep the front end of the plug part vertical.

  The mold injection structure of the optical lens manufacturing of the present invention prevents the friction and damage to the male mold cover when the tolerance is not accumulated, the precision is high, the yield rate is high, and the front end of the injection insertion part is inclined to one side. There is an advantage of doing.

  The main object of the present invention is to provide a mold injection structure for manufacturing an optical lens. Among them, the following are included.

  A ball shaft cover and an injection insertion portion are installed in the male mold cover, and the injection insertion portion includes a mold piston, a pad, and a support rod. Furthermore, one or more buffer portions are installed on the support rod, and the outer diameter of the buffer portion is smaller than the outer diameter of the support rod.

  The female mold cover is installed corresponding to the male mold cover, and a mold hole is formed between them.

The buffer part formed on the support rod gives the support rod a flexible elasticity, and the defects that occur when the injection structure is tilted to one side by the mold operation are corrected by the deflection of the buffer portion of the support rod, and the injection insertion part Keep the front edge of the vertical. At the same time, these injection structures connect the fitting part on the mold, so that the problem of the total accumulated tolerance is solved, and further, the yield rate and precision of optical lenses are greatly improved, which is a kind of optical lens manufacturing. A mold injection structure is achieved.
[Example]

  Other features and advantages of the present invention and their effects will be described below with reference to the drawings.

  As shown in FIGS. 2 and 3, the present invention is a kind of mold injection structure for manufacturing an optical lens, including the following.

  The male mold cover 32 has a ball shaft cover 33 and an injection insertion part 34 installed therein. The injection insertion portion 34 is configured by connecting the mold piston 341 to the support rod 342, and a pad 343 is installed at the connection location of the mold piston 341 and the support rod 342. The support rod 342 is provided with one or more buffer portions 3421, the outer diameter of the buffer portion 3421 is smaller than the outer diameter of the support rod 342, and a screw hole 3422 is provided at the end of the support rod 342.

  The female mold cover 31 is installed in correspondence with the male mold cover 32, and a mold hole 35 is formed between them.

As shown in FIGS. 4 and 5, when the present invention is actually applied to the mold 2, the female mold cover 31 is installed in the upper mold 21, and the male mold cover 32 is fixed in the lower mold 22. The injection insertion portion 34 is fixed onto the injection template 23 of the lower mold 22 together with the pad piece 231 and the screw fixing component 232 facing each other by the screw hole 3422 at the end of the support rod 342.
The liquid lens body material is injected into a mold hole 35 having a specific shape formed by both the injection female mold cover 31 and the male mold cover 32, and further placed under a specific pressure and temperature for a predetermined time to mold an optical lens. Subsequently, the upper mold 21 and the lower mold 22 are separated. Further, the injection insertion part 34 is advanced by the injection template 23 to inject the molded optical lens. As shown in FIG. 4, the support rod 342 of the injection insertion portion 34 of the present invention is provided with a buffer portion 3421, and since the outer diameter of the buffer portion 3421 is smaller than the outer diameter of the support rod 342, the entire support rod 342 is bent. It can have elasticity. As a result, if the advance distance of the injection insertion part 34 due to the movement of the mold 2 is not constant, or if the injection insertion part 34 is inclined to a certain side, it is supported by the elasticity of the buffer part 3421 and the support rod 342. By the action of inclining and correcting the latter half of the flange 342 in accordance with the injection insertion portion 34, the front end of the injection insertion portion 34 keeps a straight line and the optical lens is emitted. At the same time, the front end of the injection insertion part 34 is inclined to one side, thereby preventing the mold 2 from sticking due to mutual friction with the male mold cover 32. Since the support rod 342 of the injection insertion portion 34 of the present invention is integrally molded and directly connected to the injection template 23, the disadvantage of the accumulated tolerance that occurs when a known structure is used is solved. Achieve a kind of optical lens manufacturing mold injection structure with significantly improved non-defective product rate and precision.

It is a section indication figure when a publicly known injection structure is actually applied on a metallic mold. It is a three-dimensional view of the present invention. It is an exploded view of the present invention. It is an operation | movement instruction diagram at the time of inclination of this invention. It is a cross-sectional instruction | indication when it actually applies on the metal mold | die of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mold 11 Upper mold 12 Lower mold 13 Injection structure 131 Support rod 132 Mold piston 133 Ball axis cover 14 Female mold stand 15 Male mold stand 16 Mold hole part 17 Injection template 171 Fitting part 172 Fixed component 2 Mold 21 Upper mold 22 Lower mold 23 Injection template 231 Pad piece 232 Screw fixing part 31 Female mold cover 32 Male mold cover 33 Ball shaft cover 34 Injection insertion part 341 Mold piston 342 Support rod 3421 Buffer part 3422 Screw hole 343 Pad 35 Mold hole part

Claims (3)

In the mold injection structure of optical lens manufacture,
It consists of a male mold cover and a female mold cover that is placed relative to the male mold cover.
An injection insertion portion for pushing out the ball shaft cover and the molded lens is installed inside the male mold cover. The injection insertion portion is composed of a mold piston and a support rod, and the support rod is smaller than the outer diameter of the support rod. Formed one or more buffer portions having an outer diameter,
A mold injection structure for manufacturing an optical lens.   2. The mold injection structure for manufacturing an optical lens according to claim 1, wherein the male mold cover is provided with a screw hole at a support collar end of an internal injection insertion portion.   2. The mold injection structure for manufacturing an optical lens according to claim 1, wherein the male mold cover is provided with a pad at a position where the mold piston and the support rod of the internal injection insertion portion are connected.

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