KR20120101929A

KR20120101929A - Molding apparatus for injection molding and method thereof

Info

Publication number: KR20120101929A
Application number: KR1020110020065A
Authority: KR
Inventors: 강완석
Original assignee: 주식회사 로보이엔지
Priority date: 2011-03-07
Filing date: 2011-03-07
Publication date: 2012-09-17

Abstract

Disclosed are a mold apparatus for injection molding and an injection molding method using the same. According to one embodiment of the invention, the first and second molds detachably mounted to each other; A gate provided in the first mold such that molten resin is injected to the boundary portions of the first and second molds, and having a fallopian-shaped flow path having an increased end diameter; A cavity provided between the first and second molds to be connected to an end of the gate and forming a space for forming the molten resin into a product; And a dispersion part installed in the second mold to be slidable toward the gate and inserted at the end of the gate to disperse the molten resin to be supplied to the cavity. It includes a mill pin is provided at the end of the cutting portion for cutting.
According to the present invention, high-precision products such as EDLC gaskets can be manufactured in high quality by injection molding, and the cutting of the product is performed in a continuous process after injection, thereby minimizing defects of the product and increasing the yield of the product. There is an advantage to this.

Description

Mold apparatus for injection molding and injection molding method using the same {MOLDING APPARATUS FOR INJECTION MOLDING AND METHOD THEREOF}

The present invention relates to an injection mold apparatus and a method, and more particularly, to an injection molding mold apparatus and an injection molding method using the same to enable high-precision products such as EDLC gaskets to be manufactured in high quality by injection molding.

In general, a mold is a mold made of metal materials for mass production of products of the same standard, and is used to manufacture parts of various products including automobiles as well as electric and electronic products such as mobile phones and televisions. Instead, the rubber, aluminum, glass, etc. can be molded and mass produced.

On the other hand, there are various methods of molding plastics depending on the type of material used, the shape of the mold and the melting method, and are mainly classified into injection molding, extrusion molding, transfer molding, lamination molding, blow molding, thermoforming and cold molding. .

In the plastic molding method, injection molding is performed by injecting a resin raw material into an injection cylinder to melt the molten resin, and injecting the molten resin into a cavity, which is a space formed by a metal mold, by means of a hydraulic plunger or an extruder screw, thereby cooling and curing the resin. As a molding of various plastic products, it is widely used in that it is possible to realize a free shape of a molding and to manufacture a molding of a large volume.

The apparatus used in the conventional injection molding includes an upper mold connected to the injection cylinder, and a lower mold coupled to be movable relative to the upper mold, and the molten resin injected from the injection cylinder is disposed between the upper mold and the lower mold. Injection into the cavity allows a molding to be produced that matches the shape of the cavity.

However, the conventional injection molding using a mold apparatus had a problem in that it is difficult to manufacture according to the size and shape of the product, such a product is a gasket for an EDLC (Electric Double Layer Capacitor).

Here, the EDLC is a power storage device that replaces the battery for the output auxiliary for the peak cut for the regenerative power storage or for the short-term power failure backup, and a separator is installed in the upper and lower cases, and the upper and lower sides of the separator. The polarizable electrode is filled in, the polarized electrode and the separator are filled with an electrolyte solution, and sealed by a gasket so that the electrolyte solution does not leak to the contact portions of the upper and lower cases.

As described above, the gasket for EDLC is diverse but generally has a very small size having a thickness of about 0.6 mm and a diameter of about 3 mm, but it is a high-precision part having a very precise and detailed configuration or shape. It was difficult, and had a problem that makes it difficult to separate the product from the injection molding after injection.

In order to solve the conventional problems as described above, the present invention proposes an injection molding die apparatus and an injection molding method using the same, which enables high-precision products such as EDLC gaskets to be manufactured in high quality by injection molding.

In addition, the present invention proposes a molding apparatus for injection molding and an injection molding method using the same to minimize the defect of the product by increasing the yield of the product by minimizing the defect of the product by performing the cutting of the product after the injection.

Still other objects of the present invention will be readily understood through the following description of the embodiments.

In order to achieve the object as described above, according to an aspect of the present invention, a mold apparatus for molding a product by injection, the first and second molds detachably mounted to each other; A gate provided in the first mold such that molten resin is injected to a boundary portion of the first and second molds, and having a fallopian-shaped flow path having an increased end diameter; A cavity provided between the first and second molds to be connected to an end of the gate and forming a space for forming a molten resin into a product; And a dispersion part installed in the second mold to be slidable toward the gate and inserted into an end of the gate to disperse the molten resin to be supplied to the cavity, and sliding the cavity from the gate when sliding to the gate side. Provided is a mold apparatus for injection molding comprising a mill pin provided at the end of the cutting portion for cutting the product to be separated from the injection molding by isolation.

The cavity may be formed on one side of the first mold to be positioned around an outer edge of the end of the gate.

The mill pin, the dispersion portion may be formed in a conical shape.

The mill pin, the cutting portion may be formed as a step around the lower portion of the dispersion.

The cavity may have a shape for forming an EDLC gasket as a product.

According to another aspect of the present invention, there is provided a method for molding a product by injection, comprising: injecting molten resin into a cavity between a first and a second mold through a gate of a fallopian tube phenomenon; Curing the molten resin in the cavity to form a product; And cutting the product in the cavity to be separated from the injection molding by sliding the pins toward the gate side.

In the injecting of the molten resin, the gate is provided on the first mold, and the cavity is formed on one side of the first mold so as to be formed around the outer edge of the end of the gate, and is slidable to the second mold. A conical dispersion portion is formed at the end of the milpin to be coupled, and the dispersion portion is positioned at the end of the gate so that molten resin is dispersed and supplied to the cavity.

The injection of the molten resin may be such that the catby has a shape for forming an EDLC gasket as a product.

The cutting of the product may include a cutting part having a stepped portion around the lower portion of the dispersing portion for the mill pin to cut the product.

After finishing the cutting of the product, the first and second molds may be separated from each other, and further comprising the step of withdrawing the product from the cavity.

According to the injection molding apparatus according to the present invention and the injection molding method using the same, high-precision products such as EDLC gaskets can be manufactured in high quality by injection molding, and the product is cut by a continuous process after injection. In addition to minimizing the defects, there is an advantage to increase the yield of the product.

1 is a cross-sectional view showing a mold apparatus for injection molding according to the present invention,
2 is a flowchart illustrating an injection molding method according to the present invention;
3 and 4 are views for explaining the injection molding method according to the present invention,
5 is a cross-sectional view showing a gasket for an EDLC manufactured by an injection molding method according to the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. However, this is not intended to limit the present invention to specific embodiments, it should be understood in a way that includes all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the same or corresponding components will be given the same reference numerals regardless of the reference numerals, and redundant description thereof will be omitted.

1 is a cross-sectional view showing a mold apparatus for injection molding according to the present invention.

As shown in FIG. 1, the mold apparatus 100 for injection molding according to the present invention includes first and second molds 110 and 120, a gate 130 provided in the first mold 110, and first and second molds. A cavity 140 provided between the second molds 110 and 120 and a mill pin 150 installed in the second mold 120 may be included.

The first and second molds 110 and 120 are, for example, made of a block shape and installed in the injection molding apparatus so as to be detachable from each other in order to allow relative movement.

The gate 130 is provided in the first mold 110 so that the molten resin A is injected to the boundary portions of the first and second molds 110 and 120, and the molten resin A reaches the cavity 140. It has a flow path 131, but has a fallopian tube-shaped flow path 131 is increased in diameter. In addition, the gate 130 may be installed to be detachable from the first mold 110 by being inserted perpendicularly to the first mold 110 as in the present embodiment. Alternatively, the gate 130 may be integrally formed with the first mold 110. It may be formed.

The cavity 140 is provided between the first and second molds 110 and 120 to be connected to an end of the gate 130, and forms a space for forming the molten resin into the product B.

The cavity 140 is formed on one side of the first mold 110 to be positioned around the outer edge of the end of the gate 130 to allow the mill pin 150 to pass through the inside, and is formed in a ring shape, for example. It may have a shape for molding a gasket 10 (shown in FIG. 5) for an electric double layer capacitor as a product.

The mill pin 150 is installed in the second mold 120 to be slidable toward the gate 130 driven by an actuator, for example, a cylinder, and is inserted into the end of the gate 130 to supply molten resin to the cavity 140. Dispersion unit 151 is formed to disperse, and when sliding toward the gate 130, the product 140 is isolated from the gate 130 by separating the cavity 140 from the gate 130, that is, the molten resin A in the gate 130. Cutting portion 152 for cutting so as to separate from the end is provided

The mill pin 150 may be formed in a conical shape such that the dispersion part 151 corresponds to the fallopian tube shape of the gate 130. Here, the dispersing unit 151 is formed in a conical shape, and may be positioned to form a concentric circle with the shape of the fallopian tube of the gate 130, and the molten resin is uniformly distributed to the cavity 140 to supply the precision of the product B. Can increase.

The mill pin 150 has a cutting portion 152 formed as a step around the lower end of the dispersing part 151 so that the cutting part 152 formed as a step when the close contact with the bottom of the gate 130 separates the product B from the injection molded product. To cut.

Meanwhile, a plurality of gates 130 may be provided in the first mold 110, for example, four in two rows, and eight in total, and together with the cavity 140, each of the gates 130 in the first mold 110 may be provided. A plurality of, for example, eight may be formed to correspond to the plurality, and a plurality of millpins 150 may be installed on the second mold 120 to correspond to each of the gates 130.

The number of the gate 130, the cavity 140 and the mil fin 150 is only an example, it is apparent that there may be at least one or more according to various conditions such as the purpose or work convenience.

2 is a flow chart for explaining the injection molding method according to the present invention.

As shown in FIG. 2, the injection molding method according to the present invention may include an injection step (S11) of a molten resin, a step (S12) of curing a product, and a step (S13) of cutting a product.

According to the molten resin injection step (S11), the molten resin is injected into the cavity 140 between the first and second molds 110 and 120 through the fallopian tube-shaped gate 130. In this case, the gate 130 is formed in the first mold 110, the cavity 140 is formed on one side of the first mold 110 so as to be formed around the outer edge of the end of the gate 130, the second mold ( Conical dispersion 151 is formed at the end of the mill pin 150 slidably coupled to 120, and the molten resin is placed in the cavity 140 by having the dispersion 151 at the end of the gate 130. It can be distributed and supplied.

Injecting the molten resin (S11) may have the shape of the caribbean 140 for molding the EDLC gasket 10 (shown in FIG. 5) as a product.

According to the step S12 of curing the product, the molten resin in the cavity 140 is cooled and cured to form the product (B). In this case, the molten resin is cooled by heat exchange with the outside, and may be cooled by heat exchange with a refrigerant circulated and supplied to any one or both of the first and second molds 110 and 120 as necessary.

According to the step S13 of cutting the product, as shown in FIG. 3, the product B in the cavity 140 is slid in the gate 130 by sliding the mil pin 150 toward the gate 130. Cutting to separate from the injection.

Cutting the product (S13) may be a cutting portion 152 consisting of a stepped mil pin 150 around the lower portion of the dispersion portion 151 for cutting the product (B). Therefore, when the mil fin 150 is slid toward the gate 130, the cutting part 152 forming the step is inserted between the cavities 140 formed in a ring shape along the outer circumference of the end of the gate 130, thereby allowing the cavity 140 to be inserted. The product B in the cutting action is to be separated from the injection molding.

After finishing the cutting of the product (S13), as shown in FIG. 4, the first mold 110 is separated from each other from the second mold 120, and the remaining injection products A separated from the product B are removed. Next, withdrawing the product B from the cavity 140 may be carried out (S14). In this case, the mill pin 150 may withdraw the product B from the cavity 140 by the two-step sliding movement in the same direction after the one-step sliding movement by the actuator for cutting.

According to the injection molding apparatus according to the present invention and the injection molding method using the same, high-precision products such as EDLC gaskets can be produced in high quality by injection molding, so that the cutting of the product after injection is performed in a continuous process By minimizing the defects of the product by increasing the yield of the product.

Preferred embodiments of the present invention described above are disclosed for purposes of illustration, and those skilled in the art will be able to make various modifications, changes, and additions within the spirit and scope of the present invention. Additions should be considered to be within the scope of the following claims.

110: first mold 120: second mold
130: gate 131: euro
140: Cavity 150: Milpin
151: dispersion portion 152: cutting portion
A: Molten resin B: Product

Claims

In a mold apparatus for molding a product by injection,
First and second molds detachably mounted to each other;
A gate provided in the first mold such that molten resin is injected to a boundary portion of the first and second molds, and having a fallopian-shaped flow path having an increased end diameter;
A cavity provided between the first and second molds to be connected to an end of the gate and forming a space for forming a molten resin into a product; And
A dispersing part is installed in the second mold so as to slide toward the gate and is inserted into an end of the gate to disperse the molten resin to be supplied to the cavity, and when sliding to the gate side, the cavity is isolated from the gate. Milpin is provided at the end of the cutting portion for cutting the product to be separated from the injection molding by
Injection molding mold apparatus comprising a.

The method of claim 1, wherein the cavity,
Injection mold apparatus, characterized in that formed on one side of the first mold so as to be located around the outer edge of the end of the gate.

The method of claim 1, wherein the milpin,
Injection mold apparatus, characterized in that the dispersion portion is formed in a conical shape.

The method according to claim 1 or 3, wherein the milpin,
Injection mold apparatus, characterized in that the cutting portion is formed as a step around the lower periphery of the dispersion.

The method of claim 1, wherein the cavity,
An injection molding die apparatus having a shape for molding an EDLC gasket as a product.

In a method for molding a product by injection,
Injecting molten resin into the cavity between the first and second molds through a fallopian gate;
Curing the molten resin in the cavity to form a product; And
Sliding the mill pin toward the gate to cut the product in the cavity to be separated from the injection molding
Injection molding method comprising a.

The method of claim 6, wherein the injection of the molten resin,
The gate is provided in the first mold, and the cavity is formed on one side of the first mold so as to be formed around the outer edge of the end of the gate, and is conical at the end of the mill pin slidably coupled to the second mold. And a dispersion portion is formed, and the dispersion portion is positioned at the end of the gate so that molten resin is dispersed and supplied to the cavity.

The method of claim 6 or 7, wherein the injection of the molten resin,
And said catby has a shape for forming an EDLC gasket as a product.

The method of claim 7, wherein the cutting of the product,
Injection molding method characterized in that the cutting part consisting of a stepped around the lower portion of the dispersion portion for the mill pin to cut the product.

7. The injection molding method according to claim 6, further comprising, after the cutting of the product, the first and second molds are separated from each other and the product is withdrawn from the cavity.