WO2020050438A1

WO2020050438A1 - Molding device capable of removing burr

Info

Publication number: WO2020050438A1
Application number: PCT/KR2018/010494
Authority: WO
Inventors: 이학성; 유지훈; 양동열
Original assignee: 한국기계연구원
Priority date: 2018-09-07
Filing date: 2018-09-07
Publication date: 2020-03-12

Abstract

The present invention relates to a molding device capable of removing burr. According to an embodiment of the present invention, a molding device comprises an upper mold and a lower mold comprising one surface coming in contact with one surface of the upper mold, wherein the lower mold comprises a lower mold body, a lower cavity arranged to be invaginated into the mold body from one surface coming in contact with one surface of the upper mold of the lower mold body, and a burr holder part, which is arranged to be invaginated into the mold body from one surface coming in contact with one surface of the upper mold of the lower mold body, is arranged to be spaced from the lower cavity, and accommodates burr that is not accommodated in the lower cavity.

Description

Molding device for deburring

The present invention relates to a molding apparatus capable of removing burrs. The present invention includes a shoe forming apparatus.

In general, in order to mass-produce a product having a relatively complex shape, it is preferable to form it through casting. As such a casting product is formed by injection molding or the like, inevitably, burrs are generated. These burrs have to be removed along with the finishing process, and in order to remove these burrs or sprues, the worker has performed the work by hand through a knife. Since such work may result in a decrease in production rate, waste of work force, and injury through a knife, many devices for improving productivity and safety of workers through various mechanical devices have been developed.

For example, in Korean Patent Application Publication No. 10-2001-0031921, a method and apparatus for removing burrs by bringing a cutting edge close to burrs according to burr detection signals is disclosed, but this controls the pressure applied to the product. This is not easy, there is a problem that can not only remove the burr on the product and can scratch the surface of the product to increase the defect rate of the product.

On the other hand, compression molding, which is widely used for rubber molding, requires trimming to remove burrs after product production by forming burrs during molding.

There are transfer molds or injection molds that use an injection port as a mold-free mold method.

However, due to the degree of freedom and economic advantages of material selection, there are cases where a compression molding mold is used as in the case of a shoe sole, so a method of removing burrs generated during compression molding is needed.

Prior art is Korean Patent Publication No. 10-2001-0031921.

An object of the present invention is to provide a molding apparatus capable of removing burrs during product demolding by embedding burrs generated during product molding into burr holder portions.

In addition, the present invention can provide a molding apparatus capable of increasing quality and lowering production costs by easily removing burrs when manufacturing shoes requiring mass production of various and complicated shapes.

The present invention can provide a molding apparatus having the above-described function by applying 3D printing technology to include a configuration for deburring as an embodiment.

Molding apparatus according to an embodiment of the present invention, the upper mold; And a lower mold including one surface in contact with one surface of the upper mold.

The lower mold may include a lower mold body, a lower cavity disposed by being inserted into the mold body from one surface of the lower mold body that is in contact with one surface of the upper mold, and one surface of the upper mold among the lower mold bodies. It includes a burr holder portion, which is disposed by being inserted into the inside of the mold body from one side in contact with, is spaced apart from the lower cavity, and accommodates burrs that are not accommodated in the lower cavity.

The burr holder portion is exposed to one side of the lower mold body, a burr inlet providing a passage to accommodate the burr therein, and a guide wall forming an area for receiving a burr moved inward through the burr inlet. Including, at least a portion of the guide wall is disposed to be inclined with respect to a direction perpendicular to one surface of the lower mold body so that the cross-sectional area of the area to accommodate the burr formed by the guide wall is larger than the cross-sectional area of the burr inlet Can be.

The burr holder portion is exposed to one side of the lower mold body, a burr inlet providing a passage to accommodate the burr therein, and a guide wall forming an area for receiving a burr moved inward through the burr inlet. Including, it is formed extending from the guide wall, and may further include a burr seating portion that forms a region surrounding the guide wall to provide a space for receiving burrs in the guide wall and the surrounding region. The burr seating portion may have a hemispherical shape.

The molding apparatus according to another embodiment of the present invention may further include a burr storage unit in which the burrs accommodated in the burr holder unit are moved and stored.

A burr flow path portion disposed between the burr holder portion and the burr storage portion and providing a passage through which the burr accommodated in the burr holder portion moves may be further included.

The burr flow path portion is formed to extend downward from the burr holder portion, so that the burr accommodated in the burr holder portion can move to the burr storage portion by gravity.

The burr holder portion is exposed to one side of the lower mold body, a burr inlet providing a passage to accommodate the burr therein, and a guide wall forming an area for receiving a burr moved inward through the burr inlet. Including, the burr flow path portion is disposed to penetrate at least a portion of the guide wall of the burr holder portion, the portion of the guide wall located in the direction connected to the flow path portion is inclined with respect to the direction perpendicular to one surface of the lower mold body Can be placed.

An angle in which a portion of the guide wall positioned in a direction connected to the flow path portion is inclined with respect to a direction perpendicular to one surface of the lower mold body, a portion of the guide wall located in a direction opposite to a direction connected to the flow path portion It may be larger than an angle inclined with respect to a direction perpendicular to one surface of the lower mold body.

Molding apparatus according to another embodiment of the present invention, the upper mold, the upper mold body; And a portion of the upper mold body protruding from one surface contacting one surface of the lower mold, and disposed in an area corresponding to the burr holder portion of one surface of the upper mold body so that one surface of the upper mold is It may include; when in contact with one surface of the lower mold burr pressing portion is at least a part of the burr holder portion of the lower mold.

Shoe forming apparatus according to an embodiment of the present invention, the upper mold; And a lower mold including one surface in contact with one surface of the upper mold.

A molding apparatus according to an embodiment of the present invention can remove burrs during product demoulding by embedding burrs generated during product molding into burr holder portions.

In addition, it does not require a separate trimming to remove burrs after manufacturing the molded product, and it is possible to reduce the defect rate of the product and the defects of the product that may occur due to the separate operation.

In addition, since a separate burr removal operation is unnecessary during a continuous molding process, there is an effect of maximizing the efficiency of the operation.

In addition, the shoe forming apparatus according to the embodiment of the present invention can increase the quality and lower the production cost by easily removing burrs when manufacturing shoes requiring mass production of various and complicated shapes.

1 is a perspective view of a molding apparatus according to an embodiment of the present invention.

2 is a cross-sectional view taken along line AA ′ in FIG. 1.

3 is a perspective view of a molding apparatus according to another embodiment of the present invention.

4 is a cross-sectional view taken along line BB 'of FIG. 3.

5 is a cross-sectional view of a molding apparatus according to another embodiment of the present invention.

6 is a perspective view of a molding apparatus according to an embodiment of the present invention.

7 is a cross-sectional view taken along line CC ′ in FIG. 5.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, embodiments of the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. In addition, embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art. Accordingly, the shape and size of elements in the drawings may be exaggerated for a clearer description, and elements indicated by the same reference numerals in the drawings are the same elements. In addition, the same reference numerals are used throughout the drawings for parts having similar functions and functions. In addition, "including" a component throughout the specification means that other components may be further included rather than excluding other components, unless specifically stated to the contrary.

1 is a perspective view of a molding apparatus 100 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line AA ′ in FIG. 1. 1 and 2, the molding apparatus 100 according to an embodiment of the present invention, the upper mold 120; And a lower mold 110 including one surface in contact with one surface of the upper mold 120.

The lower mold 110, the lower mold body 111, the lower cavity (111) of one of the lower mold body 111, the lower surface of the mold is inserted into the interior of the mold body from one surface in contact with the lower mold (111) 112), and one of the lower mold body 111 is disposed by being embedded into the inside of the lower mold body 111 from one surface in contact with one surface of the upper mold 120, spaced from the lower cavity 112 And a burr holder portion 113 that accommodates burrs that are not accommodated in the lower cavity 112. The upper mold 120 and the lower mold 110 may include an upper cavity 122 and a lower cavity 112, respectively, wherein the upper cavity 122 and the lower cavity 112 are upper mold 120 and lower When the mold 110 is compressed on each side, it is formed to be disposed in regions corresponding to each other, thereby forming a molded product therein.

In an embodiment of the present invention, the molding apparatus 100 may be a compression-type molding apparatus 100. The molding apparatus 100 may further include a pressing member for compressing the upper mold 120 and the lower mold 110, an injection member for injecting a molding into the cavity, and the like. Synthetic resins that can be used to produce molded articles using the molding apparatus 100 include glass fiber mat reinforced plastics (GMT) and thermoplastic long fiber composites (LFT).

The burr holder part 113 is exposed to one surface of the lower mold body 111 to provide a passage through which the burr is accommodated therein, and an area for receiving a burr moved inward through the burr inlet. It may include a guide wall, forming a. In addition, a burr seating portion extending from the guide wall and forming an area surrounding the guide wall to provide a space for receiving burrs in the guide wall and the surrounding area may be further included. The burr seating portion may have a hemispherical shape.

The lower mold 110 may include a burr holder portion 113 adjacent to the cavity. The burr holder part 113 may remove burrs from the molded product by receiving a burr formed on one side of the molded product formed by compression molding of the molding material.

The burr holder portion 113 may be disposed in a form embedded in one surface of the lower mold 110, and the burr holder portion 113 may include a burr inlet, a guide wall, and a burr seating portion. Referring to FIG. 2, the burr holder unit 113 embeds the burr into the burr holder unit 113 by guiding the burr in which the molded product in the cavity is generated to the burr seating unit by the burr inlet and guide wall. In addition, when the molded product is demolded, the burr buried in the burr holder portion 113 is separated from the molded molded product, and finally, the molded product can be provided with the burr removed.

The burr inlet may be formed spaced apart from the lower cavity 112. The burr inlet is formed on the upper surface of the lower mold 110 and may have a predetermined diameter (a) through which the molding material can penetrate. The burr inlet may be formed to be spaced a predetermined distance (b) from the cavity and exposed to the upper surface of the lower mold 110. The diameter (a) is so that the burr does not overflow to the burr holder portion 113 according to the viscosity, flow rate, flow rate, etc. of the molding material, so that the burr is removed when the molded product is demolded so that it can remain in the burr holder portion 113 Can be designed. The distance (b) may be determined in consideration of the size of the molded product and the durability of the mold, and if the distance (b) is too large, a burr removal operation may be additionally required, and when the distance (b) is small, the mold Durability may decrease.

At least a portion of the guide wall is disposed to be inclined with respect to a direction perpendicular to one surface of the lower mold body 111 so that a cross-sectional area of a region accommodating the burr formed by the guide wall is larger than that of the burr inlet. Can be.

The guide wall may be formed to have a constant angle (θ ₁ ) from a vertical direction from one surface of the lower mold 110, and may have a shape that gradually increases in diameter as it goes from the burr inlet to the burr seat. The angle θ ₁ does not overflow the burr in the burr holder 113 according to the viscosity, flow rate, flow rate, etc. of the molding material, and when the molded product is demolded, the burr is removed to remain in the burr holder 113 Can be designed to

The burr seating portion stores burrs introduced by the burr inlet and the guide wall, and may have a predetermined space. The space may be determined in consideration of the burrs generated during the one-time molding process, and may be designed in an appropriate volume so that the burrs can be fixed to the burr holder portion 113 when the product is demolded.

3 is a perspective view of a molding apparatus 200 according to another embodiment of the present invention, and FIG. 4 is a cross-sectional view taken along line BB 'of FIG. 3. 3 and 4, the molding apparatus 200 according to another embodiment of the present invention may further include a burr storage unit 214 in which burrs accommodated in the burr holder unit 213 are moved and stored. have.

In addition, a burr flow path 215 which is disposed between the burr holder unit 213 and the burr storage unit 214 and provides a passage through which the burr accommodated in the burr holder unit 213 moves may be further included.

The burr flow passage 215 is formed to extend downward from the burr holder part 213, so that burrs accommodated in the burr holder part 213 can move to the burr storage part 214 by gravity.

4, the burr holder unit 213 may further include a burr storage unit 214 disposed on one side of the guide wall, and the burr holder unit 213 may include a guide wall and a burr storage unit 214. It may further include a burr flow path 215 for connecting the molding material to transfer the molding material. One end of the burr channel 215 may be connected to one side of the guide wall, and the other end of the burr channel 215 may be connected to the burr storage unit 214.

The burr storage unit 214 does not remove the burr after a single process of compression molding, and stores burrs generated according to an additional molding process after the first process to enable a continuous process of compression molding.

The burr flow path 215 may extend in the longitudinal direction, and the inside may be a tube shape having a predetermined diameter c. One end of the burr channel 215 may be formed at a position higher than the other end of the burr channel 215. When one end of the burr flow path 215 is formed at a position higher than the other end of the burr flow path 215, when the molding material laminated to the burr seating portion is stacked to a certain height, the molding material is gravity-burred the storage portion 214 It can be transferred to and stored in the burr storage unit 214, it is possible to prevent the molding material stored in the burr storage unit 214 counterflow (counterfolw).

5 is a cross-sectional view of a molding apparatus according to another embodiment of the present invention. Referring to FIG. 5, the burr holder part 313 is exposed to one surface of the lower mold body 311 to provide a passage through which the burr is accommodated, and a burr inlet that moves through the burr inlet. It includes a guide wall, forming an area for receiving a burr, the burr flow path 315 is disposed to penetrate at least a portion of the guide wall of the burr holder portion 313, the burr flow path of the guide wall ( 315) may be disposed to be inclined with respect to a direction perpendicular to one surface of the lower mold body 311.

Through this, when the burr accommodated in the burr holder unit 313 is received in an amount exceeding a certain amount, it can help to move the burr storage unit 314 along the burr flow path 315.

An angle (θ ₂ ) in which the portion of the guide wall positioned in a direction connected to the burr flow path 315 is inclined with respect to a direction perpendicular to one surface of the lower mold body 311 is the burr flow path ( The part located in a direction opposite to the direction connected to 315) may be larger than an angle θ ₃ inclined with respect to a direction perpendicular to one surface of the lower mold body 111.

Through this shape, the burr accommodated in the burr holder portion 313 is accommodated to be inclined in the direction of the burr flow path 315 to move to the burr storage portion 314 through the burr flow path 315.

6 is a perspective view of a molding apparatus 400 according to an embodiment of the present invention, and FIG. 7 is a cross-sectional view of CC ′ in FIG. 5. 6 and 7, the molding apparatus 400 according to another embodiment of the present invention, the upper mold 420, the upper mold body 421; And a portion protruding from one surface of the upper mold body 421 in contact with one surface of the lower mold 410, corresponding to the burr holder portion 413 of one surface of the upper mold body 421 Burr pressing portion is disposed in the area to at least a part of the burr holder portion 413 of the lower mold 410 when one surface of the upper mold 420 is in contact with one surface of the lower mold 410 (423); may include.

The burr pressing portion 423 performs a function of removing the burr from the molded product by pressing the burr moved to the burr holder portion 413. The burr pressing portion 423 may have a shape corresponding to the shape of the burr inlet of the burr holder portion 413, and may have a shape corresponding to the shape of the portion toward the lower cavity 412 of the burr inlet. . In order to at least partially be embedded into the burr holder portion 413, it may have a shape having a tolerance of about 0.1 to 1 mm with respect to the inner diameter of the burr inlet.

The lower mold may include a lower mold body, a lower cavity disposed by being inserted into the mold body from one surface of the lower mold body that is in contact with one surface of the upper mold, and one surface of the upper mold among the lower mold bodies. It includes a burr holder portion, which is disposed by being inserted into the inside of the mold body from one side in contact with, is spaced apart from the lower cavity, and accommodates burrs that are not accommodated in the lower cavity. The upper mold, the lower mold, and the components included in the upper mold and the lower mold may be the same as described above.

The burr holder portion of the present invention can be manufactured by applying a three-dimensional printing technique. The molding apparatus according to the embodiment of the present invention can be manufactured more efficiently by manufacturing using a 3D printing technique because it includes a configuration such as a burr holder inside the lower mold. A typical molding apparatus manufacturing room manufactures a mold by machining metal materials or the like. In this case, it takes a lot of time and there is a limitation in manufacturing a mold having a complicated shape. In addition, when the mold is manufactured to be out of dimension, the machine is manufactured by machining again from the beginning, so that workability and productivity may be deteriorated. The three-dimensional printing technology and three-dimensional printer that can be used to manufacture the molding apparatus according to the embodiment of the present invention are not particularly limited.

The present invention is not limited by the above-described embodiments and the accompanying drawings, but is intended to be limited by the appended claims. Accordingly, various forms of substitution, modification, and modification will be possible by those skilled in the art without departing from the technical spirit of the present invention as set forth in the claims, and this also belongs to the scope of the present invention. something to do.

Claims

Upper mold; And a lower mold including one surface in contact with one surface of the upper mold.

The lower mold,

Lower mold body,

Among the lower mold body, a lower cavity disposed by being embedded into the mold body from one surface contacting one surface of the upper mold, and

Among the lower mold bodies, one surface that is in contact with one surface of the upper mold is disposed to be inserted into the mold body, spaced apart from the lower cavity, and accommodates burrs that are not accommodated in the lower cavity. The burr holder portion, which includes,

Molding device.
The method of claim 1,

The burr holder portion is exposed to one side of the lower mold body, a burr inlet providing a passage to accommodate the burr therein, and a guide wall forming an area for receiving a burr moved inward through the burr inlet. Including,

At least a portion of the guide wall is disposed to be inclined with respect to a direction perpendicular to one surface of the lower mold body so that a cross-sectional area of a region accommodating the burr formed by the guide wall is larger than that of the burr inlet,

Molding device.
The method of claim 1,

The burr holder portion is exposed to one side of the lower mold body, a burr inlet providing a passage to accommodate the burr therein, and a guide wall forming an area for receiving a burr moved inward through the burr inlet. Including,

It is formed extending from the guide wall, and further includes a burr seating portion forming an area surrounding the guide wall to provide a space for receiving burrs in the guide wall and the surrounding area.

Molding device.
According to claim 3,

The burr seat is a hemispherical shape,

Molding device.
The method of claim 1,

Further comprising a burr storage unit 214 in which the burr accommodated in the burr holder is moved and stored,

Molding device.
The method of claim 5,

Further comprising a burr flow path portion disposed between the burr holder portion and the burr storage portion, and providing a passage through which the burr accommodated in the burr holder portion moves,

Molding device.
The method of claim 6,

The burr flow path portion is formed to extend downward from the burr holder portion, so that the burr accommodated in the burr holder portion moves to the burr storage portion by gravity.

Molding device.
The method of claim 6,

The burr holder portion is exposed to one side of the lower mold body, a burr inlet providing a passage to accommodate the burr therein, and a guide wall forming an area for receiving a burr moved inward through the burr inlet. Including,

The burr flow path portion is disposed to penetrate at least a portion of the guide wall of the burr holder portion,

A portion of the guide wall located in a direction connected to the flow path portion is disposed to be inclined with respect to a direction perpendicular to one surface of the lower mold body,

Molding device.
The method of claim 8,

An angle in which the portion of the guide wall positioned in a direction connected to the flow path portion is inclined with respect to a direction perpendicular to one surface of the lower mold body,

A portion of the guide wall located in a direction opposite to a direction connected to the flow path portion is larger than an angle inclined with respect to a direction perpendicular to one surface of the lower mold body,

Molding device.
The method of claim 1,

The upper mold,

Upper mold body; And

A part of the upper mold body is disposed to protrude on one surface in contact with one surface of the lower mold, and is disposed in an area corresponding to the burr holder part of one surface of the upper mold body so that one surface of the upper mold is the Includes; in contact with one side of the lower mold burr pressing portion is at least partially embedded in the burr holder portion of the lower mold;

Molding device.
Upper mold; And a lower mold including one surface in contact with one surface of the upper mold.

The lower mold,

Lower mold body,

Among the lower mold body, a lower cavity disposed by being embedded into the mold body from one surface contacting one surface of the upper mold, and

Among the lower mold bodies, one surface that is in contact with one surface of the upper mold is disposed to be inserted into the mold body, spaced apart from the lower cavity, and accommodates burrs that are not accommodated in the lower cavity. The burr holder part, which includes,

Shoe forming device.