KR102265306B1 - Mold device for producing diffusing lens for display unit - Google Patents

Abstract

The present invention, a first mold forming an upper core; a second mold opening and closing with respect to the first mold and forming a lower core; a sprue formed in any one of the first mold and the second mold and into which the molten resin is injected; a runner defined by the first mold and the second mold and formed around the sprue; a plurality of cavities defined by the first mold and the second mold, into which the molten resin is injected, to form a lens having a lens shape, and to be radially formed around the sprue; a gate defined by the first mold and the second mold, the gate communicating the runner and the cavity; a runner cutting pin configured to separate the lens from the runner crab generated by the runner and the gate; a take-out rod comprising a runner crab rod for taking out the runner crab and a lens rod for taking out the lens; a cutting drive block on which the runner cutting pin is mounted and for elevating the runner cutting pin; and a take-out drive block that operates after the runner crab is cut by the cutting drive block, the take-out rod is mounted, and elevates the runner cutting pin.

Description

Diffuse lens manufacturing mold device for display {MOLD DEVICE FOR PRODUCING DIFFUSING LENS FOR DISPLAY UNIT}

The present invention relates to a device for manufacturing a diffusion lens for a display.

The synthetic resin product is molded and manufactured using a metallic mold in order to be molded to have a high degree of completeness with a complex shape by using the plasticity and fluidity of the material.

There is a diffusion lens for display as a product made of such a synthetic resin material. Korean Patent Publication No. 10-2009-0075042 "An injection mold of an aspherical plastic lens is disclosed as a conventional mold technology for injecting a camera lens.

According to this conventional technique, there is a problem in that productivity is reduced because a cutting operation is added to separate the lens from the runner crab.

In addition, "Mold having a cutting mill pin and a product manufacturing method using the same" disclosed in Korean Patent Publication No. 10-1902327 discloses a configuration for simultaneously cutting and taking out a product using a cutting mill pin.

However, even in this case, when separating the runner crab and the lens, it is difficult to apply sufficient cutting force, and if too strong force is applied, the cutting cannot be done accurately or the lens is separated from the runner crab too strongly, resulting in a decrease in productivity. have.

The present invention has been devised to solve the above-mentioned problem, and it is to provide a mold apparatus for manufacturing a diffusion lens for a display that increases productivity by allowing the runner scrap and the lens part to be cut well even with a relatively pressing force.

A device for manufacturing a diffusion lens for a display according to an embodiment of the present invention devised in order to solve the above problems includes: a first mold forming an upper core; a second mold opening and closing with respect to the first mold and forming a lower core; a sprue formed in any one of the first mold and the second mold and into which the molten resin is injected; a runner defined by the first mold and the second mold and formed around the sprue; a plurality of cavities defined by the first mold and the second mold, into which the molten resin is injected, to form a lens having a lens shape, and to be radially formed around the sprue; a gate defined by the first mold and the second mold, the gate communicating the runner and the cavity; a runner cutting pin configured to separate the lens from the runner crab generated by the runner and the gate; a take-out rod comprising a runner crab rod for taking out the runner crab and a lens rod for taking out the lens; a cutting drive block on which the runner cutting pin is mounted and for elevating the runner cutting pin; and the runner crab is operated after being cut by the cutting driving block, and the take-out rod is mounted to elevate the take-out rod to separate the lens and the runner crab to separate from the first mold and the second mold It may include a take-out driving block.

Here, the camera lens manufacturing mold apparatus further includes; a gate piece installed in the second mold, attached to the cavity side of the gate, and having an inlet hole, wherein the runner cutting pin is mounted on the gate piece It can be driven up and down by being closely attached.

Here, the inlet hole may include a tapered portion and a cutter extending from the tapered portion.

A mold apparatus for manufacturing a diffusion lens for a display according to another embodiment of the present invention includes: a first mold forming an upper core; a second mold opening and closing with respect to the first mold and forming a lower core; a sprue formed in the first mold and into which molten resin is injected; a runner defined by the first mold and the second mold and formed around the sprue; a plurality of cavities defined by the first mold and the second mold, into which the molten resin is injected, to form a lens having a lens shape, and to be radially formed around the sprue; a gate defined by the first mold and the second mold, the gate communicating the runner and the cavity; a take-out driving block for taking out the runner crab and the lens; and an inlet hole installed in the second mold, attached to the cavity side of the gate, and allowing the molten resin to flow into the cavity, rising according to the upward movement of the take-out driving block, and the runner crab and a gate piece configured to separate the lens; may include.

Here, the device for manufacturing the diffusion lens for display may further include an elastic member attached to the gate piece, the gate piece returning to its original state as the runner crab and the lens are separated.

Here, the inlet hole may include a tapered portion and a cutter extending from the tapered portion.

Here, it further includes a take-out rod including a runner crab rod for taking out the runner crab and a lens rod for taking out the lens, and the take-out rod may be installed in the take-out driving block.

According to an embodiment of the present invention having the above-described configuration, a cutter is formed on the cross section of the inlet hole of the gate piece to preform the cut portion on the runner crab itself and cut using this, so that the runner crab and the runner crab can be cut with a relatively small force. The lens can be cut.

In addition, according to another embodiment, an elastic member is installed on the gate piece that separates the runner crab and the lens, and as the take-out driving block is driven, the gate piece applies an impact to the cut portion due to the elastic force of the elastic member, so that the runner crab By cutting the lens and the lens, it is possible to simultaneously cut and take out with a relatively simple structure.

1 is a perspective view illustrating a mold apparatus for manufacturing a diffusion lens for a display according to an embodiment of the present invention.
2 is a bottom perspective view of a first mold in the device for manufacturing a diffusion lens for a display according to an embodiment of the present invention.
3 is a perspective view illustrating a second mold in the device for manufacturing a diffusion lens for a display according to an embodiment of the present invention.
4 is a view for explaining the internal structure of the first embodiment of the die apparatus for manufacturing a diffusion lens for a display according to the present invention.
5 is a view for explaining the internal structure of the second embodiment of the die apparatus for manufacturing a diffusion lens for a display according to the present invention.
6 is an enlarged cross-sectional view for explaining the structure of a gate piece used in the first and second embodiments of the die apparatus for manufacturing a diffusion lens for a display according to the present invention.
7 and 8 are diagrams for sequentially explaining a method of manufacturing a diffusion lens for a display according to the mold apparatus for manufacturing a diffusion lens for a display according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A detailed description of the examples shown will be set forth below with reference to the various drawings, which are illustrative and in no way limit the scope of the claimed invention. It provides detailed examples of possible implementations and is not intended to represent the only configurations in which the concepts described herein may be practiced. As such, it is intended that the detailed description includes specific details for providing a thorough understanding of various concepts, which may be practiced without these specific details.

1 is a perspective view illustrating a mold apparatus for manufacturing a diffusion lens for a display according to an embodiment of the present invention.

As shown in Figure 1, the camera lens manufacturing mold apparatus (A) according to an embodiment of the present invention, the upper base (1), the lower base (2), supporting the upper base (1) and the lower base (2) The support 3 and the support groove 4, and a first mold 10 attached to the lower surface of the upper base 1, and a second mold 20 installed on the upper surface of the lower base 2 can be

The upper base 1 forms the upper part of the camera lens manufacturing mold apparatus A according to an embodiment of the present invention, and may be made of a metal material. And the first mold 10 is installed in the central portion of the bottom surface of the upper base 1, and each corner portion is provided with a support groove (4).

The lower base 2 forms the lower part of the camera lens manufacturing mold apparatus according to an embodiment of the present invention, and may be made of a metal material. And the second mold 20 is installed in the central portion of the bottom surface of the lower base 2, the support 3 is installed in each corner portion is installed, the support groove 4 is inserted.

The upper base 1 and the lower base 2 may be installed to be fixed or elevating to the frame of the mold apparatus, and either or both may be installed so as to be elevated by a driving device. Here, the driving device may be a cylinder that converts the rotational force of the motor into a linear motion or is operated by air or hydraulic pressure.

In this way, a space is formed between the upper base 1 and the lower base 2 by the support of the support 3 and the support groove 4, and the first mold 10 and the second mold 20 are placed in this space. will be located Hereinafter, the configuration of the first mold 10 and the second mold 20 will be described with reference to FIGS. 2 and 3 , respectively.

2 is a bottom perspective view of a first mold in the device for manufacturing a diffusion lens for a display according to an embodiment of the present invention. As shown in FIG. 2 , the first mold 10 constituting the upper core 11 is installed on the upper base 1 with an upper support interposed therebetween. Although this example shows an example in which four first molds 10 are installed on the upper base 1 , it should be understood that the number of the first molds 10 is not limited.

Looking at the first mold 10 , the upper runner groove 41 is formed in the center, and the sprue 30 is attached to the center of the upper runner groove 41 . In addition, an upper gate groove 61 is formed radially around the upper runner groove 41 , and an upper cavity groove is formed at an end of the upper gate groove 61 . The upper runner groove 41 , the upper gate groove 61 , and the upper cavity groove 51 correspond to the lower runner groove 42 , the lower gate groove 62 , and the lower cavity groove 52 which will be described later so as to correspond to the runner and cavity. , to form a gate, respectively. Here, the one manufactured by the runner and the cavity is called the runner crab (R), and the one manufactured in the cavity becomes the diffusion lens (L) for display, that is, the target product.

Here, the runner is defined by an upper runner groove 41 of the first mold 10 and a lower runner groove 42 of the second mold 20, and a sprue 30 may be formed in the center. .

The gate is defined by the upper gate groove 61 of the first mold 10 and the lower gate groove 62 of the second mold 20, and serves to communicate the runner and the cavity.

The cavity is defined by the upper cavity groove 51 of the first mold 10 and the lower cavity groove 52 of the second mold 20, the molten resin is injected, and the lens (L) shape is formed. The lens (L) is formed by having the lens (L), and a plurality of sprues (30) may be radially formed.

Meanwhile, the configuration of the second mold 20 will be described in more detail with reference to FIG. 3 .

3 is a perspective view illustrating the second mold 20 in the device for manufacturing a diffusion lens for a display according to an embodiment of the present invention. As shown in FIG. 3 , the second mold 20 constituting the lower core 21 is installed on the lower base 2 with the lower support interposed therebetween. In this example, although an example in which four second molds 20 are installed on the lower base 2 is illustrated, the number of the second molds 20 is not limited, and the number of the second molds 20 is not limited to correspond to the same number as the first mold 10 placement should be understood.

Looking at the second mold 20 , it has a structure similar to that of the first mold 10 as a whole. A lower runner groove 42 is formed in the center, a lower gate groove 62 is formed radially around the lower runner groove 42, and a lower cavity groove is formed at an end of the upper gate hole. In addition, the gate piece 110 is installed at the end of the lower gate groove 62 . The gate piece 110 has an inflow hole 111 . Although the gate piece 110 is installed in the second mold 20 in the detailed description of the present invention, it should be understood that it may be installed in the first mold 10 as well. The structure of the gate piece 110 will be described in more detail with reference to FIG. 6 .

Hereinafter, specific configurations of the first and second embodiments of the die apparatus for manufacturing a diffusion lens for a display according to the present invention will be described with reference to FIGS. 4 and 5 .

4 is a view for explaining the internal structure of the first embodiment of the die apparatus for manufacturing a diffusion lens for a display according to the present invention. As shown in FIG. 4 , in the first embodiment of the present invention, the runner cutting pin 70 , the take-out rod 80 , the cutting drive block 90 , and the take-out drive block 100 may be included.

The runner cutting pin 70 is configured to separate the lens (L) from the runner crab (R) generated in the runner and the gate, and the take-out rod (80) is for taking out the runner crab (R) It may be configured to include a runner crab rod 81 and a lens rod 82 for taking out the lens (L).

The cutting drive block 90, the runner cutting pin 70 is mounted, elevates the runner cutting pin 70, and is driven independently of the take-out drive block.

The take-out drive block 100 operates independently of the cutting drive block, and the take-out rod 80 is attached to the upper part, and after the cutting drive block 90 operates, it operates to operate the lens L and the runner crab ( R) functions to separate the first mold 10 and the second mold 20 .

As it has such a configuration, the molten resin introduced through the sprue 30 has the shape of the lens (L) and the runner crab (R) and then hardens, and then the position in close contact with one side of the gate piece (110) When the runner cutting pin 70 is raised by the operation of the cutting driving block 90, the lens (L) and the runner crab (R) are separated. At this time, the runner cutting pin 70 cuts a cutting portion having a narrower diameter by the inlet hole 111 of the gate piece 110 . Then, the take-out driving block 100 is lifted, so that the lens L and the runner crab R are separated from the second mold 20 . This will be described in detail with reference to FIGS. 7 and 8 .

5 is a view for explaining the internal structure of the second embodiment of the die apparatus for manufacturing a diffusion lens for a display according to the present invention. 5, the second embodiment does not have the runner cutting pins 70 and the cutting driving block 80, unlike the first embodiment. Instead, the elastic member 120 is installed at the lower end of the gate piece 110 .

In the second embodiment, when the take-out driving block 90 is operated, the runner crab R and the gate piece 110 are moved, and the gate piece 110 connected thereto also has an inlet hole 111 in the cutting portion. ) is inserted and rises. At this time, the elastic member 120 applies a downward pressing force, and accordingly, the cutting portion of the runner crab R is cut by the gate piece 110 . As the cut portion is cut in this way, the gate piece 110 returns to its original position by the restoring force of the elastic member 120 , and automatically enters the preparation stage to proceed with the next process (new lens manufacturing process). Accordingly, not only the cutting between the runner crab R and the lens L but also the taking out of the lens L is performed by one operation of the take-out driving block 100 .

Hereinafter, the structure of the gate piece 110 that can be used in the first and second embodiments will be described.

6 is an enlarged side cross-sectional view for explaining the structure of the gate piece 110 used in the first embodiment and the second embodiment of the die apparatus for manufacturing a diffusion lens for a display according to the present invention. As shown in FIG. 6 , the inlet hole 111 of the gate piece 110 may include a tapered portion 111-1 and a cutter 111-2. The inlet hole 111 is formed on the upper portion of the gate piece 110 and has a double-bent structure when viewed in cross-section, and the first bent portion of them is called a tapered portion 111-1, and the second bent portion is It was named cutter (111-2).

As configured in this way, it is possible to minimize the thickness of the cut portion of the boundary portion in manufacturing the runner crab (R) and the lens (L) by curing the molten resin, and accordingly, in the first and second embodiments The cutting portion is easily cut by the cutting operation of the runner cutting pin 70 and the pressing force of the gate piece 110 .

Hereinafter, a method of manufacturing the diffusion lens L for a display based on the second embodiment among the embodiments of the present invention having the above-described configuration will be described.

7 and 8 are views for sequentially explaining a method of manufacturing a diffusion lens L for a display according to the mold apparatus for manufacturing a diffusion lens for a display according to the present invention.

In the device for manufacturing a diffusion lens for a display including the first mold 10 and the second mold 20 having the above configuration, the melt discharged from a nozzle (not shown) installed on the first mold 10 . The resin is supplied to the runner through the sprue 30, and moves from the runner to the cavity through the gate and the gate piece. After the molten resin is filled in the cavity, it is hardened. At this time, a gate piece 110 having an inlet hole 111 is installed in the gate, and a cut portion of the lens L is generated by the inlet hole 111 .

In this state, as shown in FIG. 7 , the upper mold is raised to open the mold. As the mold is opened, the lens (L) and the runner crab (R) are exposed. In this state, when the take-out driving block 100 is driven and the take-out rod 80 is raised and lowered, the cutting portion of the runner crab R is cut by the gate piece 110 so that the runner crab R and the lens L are is separated, and at the same time the product is taken out.

According to an embodiment of the present invention having the above-described configuration, the cutter 111-2 is formed in the cross section of the inlet hole 111 of the gate to preform the cut portion in the runner crab (R) itself, and using this By cutting, it is possible to cut the runner crab (R) and the lens (L) with relatively little force.

In addition, according to another embodiment of the present invention, by installing an elastic member on the gate piece 110 that separates the runner crab (R) and the lens (L), as the take-out driving block 100 is driven, the gate piece 110 is elastic. The runner crab (R) and the lens (L) are cut by applying an impact to the part to be cut due to the elastic force of the member, so that cutting and taking-out can be performed simultaneously with a relatively simple structure.

Although specific examples described herein are illustrated in this detailed description for purposes of illustrating example embodiments, various alternative and/or equivalent implementations may be substituted for the specific examples shown and described without departing from the scope of this detailed description. There will be recognized by one of ordinary skill in the relevant art. As such, this detailed description is intended to cover any adaptations or variations of the examples and/or embodiments shown and described herein without departing from the spirit and scope of the invention.

10: first mold
20: second mold
30: sprue
41: upper runner groove
42: lower runner groove
51: upper cavity groove
52: lower cavity groove
61: upper gate groove
62: lower gate groove
70: runner cutting pin
80: take-out rod
90: cutting drive block
100: take-out drive block
110: gate

Claims (2)

a first mold forming an upper core;
a second mold opening and closing with respect to the first mold and forming a lower core;
a sprue formed in the first mold and into which molten resin is injected;
a runner defined by the first mold and the second mold and formed around the sprue;
a cavity defined by the first mold and the second mold, into which the molten resin is injected, to have a lens shape to form a lens, and a plurality of cavities are radially formed around the sprue;
a gate defined by the first mold and the second mold, the gate communicating the runner and the cavity;
a take-out driving block for taking out the runner crab and the lens generated in the gate;
a take-out rod installed in the take-out driving block, including a runner crab rod for taking out the runner crab and a lens rod for taking out the lens; and
a gate piece installed in the second mold, installed at an end of the cavity of the gate, having an inlet hole for allowing the molten resin to flow into the cavity, and rising according to the upward movement of the take-out drive block; and
Diffusion lens manufacturing mold apparatus for display, which is attached to the gate piece, and includes an elastic member for separating the runner crab and the lens by applying a downward pressing force to the lens by the rising of the gate piece, and then returning the gate piece to its original state .
The method of claim 1,
The inlet hole is
A die apparatus for manufacturing a diffusion lens for a display, comprising a tapered portion and a cutter bent and extended from the tapered portion.

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