WO2020230902A1

WO2020230902A1 - Casting device

Info

Publication number: WO2020230902A1
Application number: PCT/JP2020/019638
Authority: WO
Inventors: 寛之中島
Original assignee: 株式会社メッツ
Priority date: 2019-05-16
Filing date: 2020-05-18
Publication date: 2020-11-19
Also published as: JP2020185599A

Abstract

The present invention addresses the problem of providing a casting device capable of further efficiently cooling a cavity. This casting device (1) casts a cast product (4) by pouring a melt into a cavity (20) formed in a mold (2). The mold (2) has: a cooling piece insertion hole (2a) which is recessed toward the cavity (20) and provided in a surface other than the surface in which the cavity (20) is formed; and a cooling piece (3, 31-34) inserted into the cooling piece insertion hole (2a). The cooling piece (3, 31-34) fits into the cooling piece insertion hole (2a) to form a cooling flow passage (30) between the cooling piece (3, 31-34) and an inner wall surface (2b) of the cooling piece insertion hole (2a), the cooling flow passage (30) causing a cooling medium (5) to flow therethrough.

Description

Casting equipment

The present invention relates to a casting apparatus.

Generally, a casting apparatus forms a cast product having a desired shape by pouring molten metal into a cavity formed between a fixed mold and a movable mold of a mold and cooling the molten metal (for example, a patent). Reference 1).

In the die casting mold described in Patent Document 1, a fixing plate (41) having a through hole (42) for circulating cooling water is arranged in the vicinity of the cavity (recess 31) of the fixed mold (30). , The magnet (40) and the recess (31) are cooled with cooling water. In order to efficiently cool the cavity (recess 31) with the cooling water of the through hole (42) of the die casting mold described in Patent Document 1, the through hole (42) should be arranged in the vicinity of the cavity (recess 31). Is desired.

Japanese Unexamined Patent Publication No. 2004-98169 (FIGS. 1 and 2)

In the die casting mold described in Patent Document 1, since the through hole (42) forming the cooling water circulation path is formed at a position separated from the recess (31), the cavity (recess 31) is efficiently cooled. There was a problem that it could not be done.

FIG. 13 is a schematic cross-sectional view of a main part showing a cavity cooling structure of a conventional casting apparatus.
In order to solve the problem and efficiently cool the cavity 200 (cast product 400), for example, as in the cooling flow path 300 shown by the alternate long and short dash line in FIG. 13, the cooling flow path 300 is set in the cavity 200. It is desirable to place it in the vicinity.

However, in the casting apparatus 100 shown in FIG. 13, since both ends of the cooling flow path 300 are arranged in contact with the cast product 400, openings 310 are formed at both ends of the cooling flow path 300, so that the opening 310 There was a problem that the cooling water leaked from.

In order to solve this problem, the conventional casting apparatus 100 forms a cooling flow path 500 at a position separated from the cavity 200 (cast product 400). Therefore, the cooling structure of the conventional casting apparatus 100 by the cooling flow path 500 has poor cooling efficiency, and it has been desired to efficiently cool the cavity 200 (cast product 400).

Therefore, the present invention has been invented in order to solve the above-mentioned problems, and an object of the present invention is to provide a casting apparatus capable of efficiently cooling the cavity.

In order to solve the above problems, the present invention is a casting apparatus for casting a cast product by pouring molten metal into a cavity formed in a mold, and the mold has a surface on which the cavity is formed. It has a cooling piece insertion hole recessed toward the cavity and a cooling piece inserted into the cooling piece insertion hole on a surface different from the above, and the cooling piece is fitted into the cooling piece insertion hole. It is characterized in that a cooling flow path for flowing a cooling medium is formed between the cooling piece and the inner wall surface of the cooling piece insertion hole.

The present invention can further provide a casting apparatus capable of efficiently cooling the cavity.

It is a figure which shows the casting apparatus which concerns on embodiment of this invention, and is the schematic sectional view which omitted the cooling piece and the like. It is a schematic perspective view which shows the cooling piece of the casting apparatus which concerns on embodiment of this invention. It is an enlarged schematic sectional view of a main part which shows typically the installation state of a cooling piece. It is a schematic perspective view which shows the cooling piece arranged in the slide core. It is a schematic cross-sectional view which shows the cooling piece arranged in the slide core. It is a schematic vertical sectional view which shows the cooling piece arranged in the slide core. It is an enlarged perspective view which has the cross section which shows the tip part of a cooling piece. It is a schematic perspective view which shows the cooling piece of the 1st modification of the casting apparatus which concerns on embodiment of this invention. It is a schematic perspective view which shows the cooling piece of the 2nd modification of the casting apparatus which concerns on embodiment of this invention. It is a schematic perspective view which shows the cooling piece of the 3rd modification of the casting apparatus which concerns on embodiment of this invention. It is a schematic perspective view which shows the cooling piece of the 4th modification of the casting apparatus which concerns on embodiment of this invention. It is a figure which shows the cooling piece of the 5th modification of the casting apparatus which concerns on embodiment of this invention. FIG. It is schematic cross-sectional view of the main part which shows the cavity cooling structure of the conventional casting apparatus.

The casting apparatus 1 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 7.
FIG. 1 is a diagram showing a casting apparatus 1 according to an embodiment of the present invention, and is a schematic cross-sectional view in which a cooling piece 3 and the like are omitted.
In the embodiment of the present invention, a case where the movable mold 21 arranged on the rear side (back side of the cavity surface 20a) shown in FIG. 1 moves in the front-rear direction (front side direction and back side direction) will be described as an example. In addition, for convenience, the vertical and horizontal directions of the drawing of FIG. 1 will be described as the vertical and front-back directions.

<Casting equipment>
As shown in FIG. 1, the casting apparatus 1 includes, for example, aluminum or the like in a cavity 20 formed between the movable insert 23 of the movable mold 21 of the mold 2 and the fixed insert 24 of the fixed mold 22. This is an apparatus for casting the cast product 4 by pouring the molten metal of No. 1 and cooling it. In the casting apparatus 1, the mold 2 may have at least a movable mold 21 having a movable insert 23 and a fixed mold 22 having a fixed insert 24, and the shape, structure, etc. are not particularly limited. ..

Hereinafter, as an example of the casting apparatus 1, a casting apparatus 1 mainly provided with a mold 2, a plurality of extrusion pins 8, and a die casting machine 6 having an extrusion mechanism 61 for operating the extrusion pins 8 will be cited as an example. explain.
The casting device 1 may be a horizontal device in which the movable type 21 moves in the horizontal direction, or may be a vertical device in which the movable type 21 moves in the vertical direction. Hereinafter, as an example thereof, a casting apparatus 1 made of a horizontal type die casting will be described as an example.

<Mold>
FIG. 2 is a schematic perspective view showing a cooling piece 3 of the casting apparatus 1 according to the embodiment of the present invention. Next, the mold 2 will be described with reference mainly to FIGS. 1 and 2.
As shown in FIG. 1, the mold 2 is mainly composed of a fixed mold 22 arranged on the front side and a movable mold 21 arranged on the rear side of the fixed mold 22 and capable of advancing and retreating in the front-rear direction. Consists of molds. As shown in FIG. 2, the mold 2 (movable mold 21) has a cooling piece insertion hole 2a (see FIG. 3) recessed toward the cavity 20 on a surface different from the surface on which the cavity 20 is formed, and cooling. It has

cooling pieces

3, 31, 32, 33, 34, which are inserted into the piece insertion holes 2a. A molten metal such as an aluminum alloy, a magnesium alloy, or a zinc alloy is supplied from the holding furnace to the cavity 20 in the mold 2 at the time of casting. The cooling pieces 3 arranged in the mold 2 may be provided in either the movable mold 21 or the fixed mold 22, and an appropriate number may be provided at an appropriate position according to the shape of the cast product 4 or the like. Should be installed.
Hereinafter, a case where the cooling pieces 3 are installed in the movable insert 23 and the slide core 27 of the movable type 21 will be described as an example.

<Movable type>
As shown in FIG. 1, the movable mold 21 is composed of a rear mold that can move forward and backward with respect to the fixed mold 22 by an advancing / retreating mechanism (not shown) of the die casting machine 6. The movable type 21 includes a movable insert 23 arranged on the cavity 20 side of the movable main type 25, a movable main type 25 arranged so as to cover the movable insert 23 from the rear side, and a rear surface side of the movable main type 25. It is configured to include a die base 29 fixed to the surface and a cooling piece 3 (see FIG. 2). The movable mold 21 is formed with a cavity 20 on the movable mold side for forming a rear portion of the cast product 4.

<Fixed type>
As shown in FIG. 1, the fixed mold 22 includes a front mold fixed to the rear surface of a fixed die plate (not shown). The fixed mold 22 has a fixed insert 24 arranged to face the front side of the movable insert 23, a fixed main mold 26 arranged to face the front side of the movable main mold 25, and the fixed insert 24 facing forward from the outside. It is configured to include a cast-in bush 28 arranged so as to be provided. The fixed mold 22 is formed with a cavity 20 on the fixed mold side for forming the front side portion of the cast product 4.

<Movable nesting>
The movable nest 23 is a movable component that forms a part (for example, a rear surface) of the cavity 20. As shown in FIG. 2, on the rear surface of the movable insert 23, there are cooling piece installation holes (not shown) for mounting a plurality of (for example, 6) cooling pieces 34 for supplying cooling water for cooling the mold. It is formed in the front direction (direction of the cavity 20) from the rear surface.

<Slide core>
The slide core 27 is a movable component that forms a part (for example, a side surface) of the cavity 20. The slide core 27 is arranged in a recess 23a formed on the top, bottom, left, and right of the movable insert 23 so as to be able to move forward and backward by a moving device (not shown) or the like. In FIG. 2, only the slide core 27 installed on the upper side of the movable insert 23 is shown, and the slide core 27 installed on the lower side, the left side, and the right side is abbreviated as the upper slide core 27. Since they are the same, they are omitted. On the upper surface (side surface) of the slide core 27, cooling piece insertion holes 2a for attaching a plurality of (for example, three) cooling

pieces

3, 31, 32, 33 for supplying cooling water for cooling the mold, respectively. (See FIG. 3) is formed in the direction of the cavity 20 from the upper surface.

Next, the cooling piece insertion hole 2a, the cavity 20, and the cooling piece 3 will be described with reference to FIG.
FIG. 3 is an enlarged schematic cross-sectional view of a main part schematically showing an installed state of the cooling piece 3.
As shown in FIG. 3, the cooling piece insertion hole 2a is an insertion hole into which cooling

pieces

31, 32, 33 (see FIG. 4) having different shapes are inserted. The inner wall surface 2b on the cavity 20 side of the cooling piece insertion hole 2a is formed up to the inside (inside) of the convex portion 2c of the mold 2 and is formed in the vicinity of the cavity 20. The inner wall surface 2b on the cavity 20 side of the cooling piece insertion hole 2a was formed on the tip surface 3c by fitting the cooling piece 3 into the cooling piece insertion hole 2a so that the tip surface 3c of the cooling piece 3 was brought into contact with the cooling piece 3. The grooves 3a are arranged so as to face each other.

<Cavity>
As shown in FIG. 3, the cavity 20 is a space in which the molten metal is poured and cooled to form the casting product 4. The cavity 20 is formed by a fixed mold 22, a movable mold 21, and a slide core 27. The mold 2 (for example, the slide core 27) forming the cavity 20 is formed with a convex portion 2c protruding in the direction of the cavity 20.

<Cooling piece>
As shown in FIG. 3, the cooling piece 3 is a flow path forming insert for providing a cooling flow path 30 inside the mold 2. As shown in FIG. 2, the cooling pieces 3 include a plurality of cooling pieces 34 arranged in the movable insert 23 on the rear side, and a plurality of cooling

pieces

31, 32, respectively arranged in the front, rear, left and right slide cores 27. 33 and is configured. The side surface of the cooling piece 3 is formed of a gently tapered surface or a straight surface.

As shown in FIG. 3, each cooling piece 3 is formed with a cooling flow path 30 that forms a part of a cooling circuit for cooling the molten metal poured into the cavity 20. Each cooling piece 3 includes an inflow port 3f and an outflow port 3g formed on the rear end surface, a supply path 3h extending from the inflow port 3f to the tip surface 3c, a groove 3a formed on the tip surface 3c, and the groove 3a. A cooling flow path 30 is formed by an outflow path 3i extending from an end (right end) to an outflow port 3g. The outer peripheral portion and the stepped portion on the base end side of each cooling piece 3 are formed to have a larger diameter than the portion closer to the tip portion, and are formed of an O-ring, a gasket, a liquid packing, etc. that prevent the cooling liquid from leaking to the outside. An annular groove 3j for installing the sealing material O1 is formed.

The groove 3a of the cooling piece 3 is fitted into the cooling piece insertion hole 2a of the mold 2 so that the cooling medium 5 flows between the groove 3a and the inner wall surface 2b of the cooling piece insertion hole 2a. It is a groove for forming a flow path that forms a part of the road 30.

FIG. 4 is a schematic perspective view showing a cooling piece 3 arranged on the slide core 27. FIG. 5 is a schematic cross-sectional view showing the cooling piece 3 arranged on the slide core 27. FIG. 6 is a schematic vertical sectional view showing a cooling piece 3 arranged on the slide core 27. FIG. 7 is an enlarged perspective view having a cross section showing the tip end portion of the cooling piece 3.

As shown in FIGS. 4 and 5, the cooling

pieces

3, 31 to 34 are formed in an appropriate number, width, thickness, and shape according to the shape and size of the cavity 20, the load applied to the cooling piece 3, and the like. ing.
Hereinafter, the cooling pieces 31 to 33 arranged on the slide core 27 on the upper side of the mold 2 will be mainly described.

Three cooling pieces 31 to 33 are arranged on the slide core 27 according to the width of the cavity 20 in the vertical and horizontal directions. The cooling pieces 31 to 33 are formed in a substantially thin plate shape in a plan view according to the length of the cavity 20 in the front-rear direction. The tip surfaces 3c of the cooling pieces 31 to 33 are formed substantially parallel to the cavity surface 20a according to the shape of the peripheral wall of the cavity 20.

As shown in FIGS. 4 and 5, the tip surface 3c of the cooling piece 31 is formed flat when viewed from the front in accordance with the shape of the cavity surface 20a. The tip surface 3c of the cooling piece 32 is formed in a substantially triangular shape when viewed from the front in accordance with the shape of the cavity surface 20a. As shown in FIGS. 4 to 6, the tip surface 3c of the cooling piece 33 is formed in a stepped shape when viewed from the front in accordance with the shape of the cavity surface 20a.

As shown in FIG. 7, a groove 3a for forming the cooling flow path 30 is recessed in the tip surfaces 3c of the cooling pieces 31 to 33. The groove 3a is formed of a U-shaped groove or a concave groove in cross section formed from the left end portion to the right end portion of the tip surface 3c. The groove 3a is formed to a substantially uniform depth along the tip surfaces 3c of the cooling pieces 31 to 33.

Supply passages 3h and outflow passages 3i are formed at the left and right ends of the grooves 3a of the cooling pieces 31 to 33 so as to penetrate the cooling pieces 3 toward the inflow port 3f and the outflow port 3g. The cooling pieces 31 to 33 are made of metal, resin, rubber, or the like. When the cooling pieces 31 to 33 are made of resin, they can be easily manufactured by resin molding.

<Cooling flow path>
As shown in FIGS. 3 and 5, at the tip of the cooling piece 3, the cooling flow path 30 forms a part of the cooling flow path 30 inside the convex portion 2c, so that the tip surface 3c of the cooling piece 3 is formed. The groove 3a and the inner wall surface 2b of the cooling piece insertion hole 2a arranged to face the tip surface 3c are formed. The supply passage 3h and the outflow passage 3i formed in each cooling piece 3 are connected to an independent cooling circuit or a shared cooling circuit, and a cooling medium 5 such as cooling water is supplied.

≪Action≫
Next, the operation of the casting apparatus 1 according to the embodiment of the present invention will be described in the order of the casting process with reference to FIGS. 1 to 7.

First, as shown in FIG. 2, a cooling piece 34 is attached to the rear surface of the movable nest 23. Next, the slide core 27 to which the cooling pieces 31 to 33 are attached is arranged in the recesses 23a on the top, bottom, left, and right of the movable insert 23. Subsequently, the movable mold 21 is moved and set on the rear surface of the fixed mold 22 to close the mold. As a result, the cavity 20 is formed in the mold 2.

Next, after preheating the mold 2, the molten metal in the holding furnace (not shown) is supplied into the mold 2 and sent so as to fill the cavity 20 with the molten metal. When the molten metal is supplied into the mold 2, the heat of the molten metal is transferred to the mold 2 to heat the mold 2.

Subsequently, when casting the cast product 4, the cooling medium 5 of the cooling circuit is supplied to the cooling flow path 30 of each cooling piece 3 and circulated so that the temperature of the molten metal and the mold 2 becomes a desired temperature. As shown in FIG. 3, since the cooling flow path 30 of each cooling piece 3 is formed up to the inside (inside) of the convex portion 2c of the cavity 20, the cooling medium 5 is sent to the vicinity of the cavity 20 to melt the molten metal. It can be easily lowered to the optimum temperature.

Next, when the molten metal in the mold 2 is cooled to the temperature at which the casting 4 is formed, the movable mold 21 is retracted by the die casting machine 6 advancing / retreating device (not shown) and separated from the fixed mold 22. Let me. Subsequently, the cast product 4 is taken out from the mold 2 by the moving device. As a result, the casting of the cast product 4 by the casting device 1 is completed.

As described above, as shown in FIG. 3, the present invention is a casting apparatus 1 in which molten metal is poured into the cavity 20 formed in the mold 2 to cast the casting product 4, and the mold 2 is a casting apparatus 1. It has a cooling piece insertion hole 2a recessed toward the cavity 20 on a surface different from the surface on which the cavity 20 is formed, and

cooling pieces

3, 31 to 34 inserted into the cooling piece insertion hole 2a for cooling. The

pieces

3, 31 to 34 are fitted into the cooling piece insertion holes 2a to allow the cooling medium 5 to flow between the cooling

pieces

3, 31 to 34 and the inner wall surface 2b of the cooling piece insertion holes 2a. Form 30.

As a result, in the casting apparatus 1 according to the present invention, by fitting the cooling piece 3 into the cooling piece insertion hole 2a, the cooling piece 3 in the vicinity of the cavity 20 and the inner wall surface 2b of the cooling piece insertion hole 2a are separated from each other. , The cooling flow path 30 can be easily formed. Since the cooling piece 3 can form a two-dimensional or three-dimensional cooling flow path 30 by fitting it into the mold 2, the cooling piece 3 attached to the mold 2 and the slide core 27 are cooled. The flow path 30 can be formed. Further, since the cooling piece insertion hole 2a into which the cooling piece 3 is inserted is recessed toward the cavity 20 on a surface different from the surface on which the cavity 20 is formed, the cavity 20 can be efficiently cooled.

Further, as shown in FIG. 3, a groove 3a forming a cooling flow path 30 is recessed in the tip surfaces 3c of the

cooling pieces

3, 31 to 34.
As a result, the cooling

pieces

3, 31 to 34 have a groove 3a for forming a cooling flow path recessed in the tip surface 3c, so that the cooling piece insertion hole 2a facing the groove 3a is a flat surface. Also, the cooling flow path 30 can be easily formed when the cooling piece is fitted into the cooling piece insertion hole 2a. Therefore, the shape of the surface of the cooling piece insertion hole 2a facing the groove 3a can be simplified.

Further, as shown in FIG. 3, the cooling

pieces

3, 31 to 34 are formed of metal, resin, or rubber.
As a result, the cooling

pieces

3, 31 to 34 are made of metal, resin, or rubber, and thus have a hollow cooling flow path 30, a groove 3a on the tip surface 3c, or a complicated shape. Even if it is a thing, it can be easily formed by one product. When the

cooling pieces

3, 31 to 34 are made of resin, it is possible to reduce the mold manufacturing cost and the cooling piece manufacturing cost, shorten the mold manufacturing time, and reduce the weight of the mold 2. ..

Further, since the cooling

pieces

3, 31 to 34 made of resin have a heat insulating effect, the cooling medium 5 that has passed through the cooling flow path 30 of the

cooling pieces

3, 31 to 34 is applied to a portion to be cooled locally. Can be cooled to. Therefore, cooling

pieces

3, 31 to 34 can be installed in the mold 2 so that the cooling medium 5 does not touch the parts that are not desired to be cooled (for example, the parts far from the product part), so that the parts are not cooled. can do. The supply passages 3h and the outflow passages 3i of the

cooling pieces

3, 31 to 34 may be formed by insert molding a resin pipe into the cooling

pieces

3, 31 to 34.

Further, as shown in FIG. 3, a convex portion 2c is formed in the cavity 20, and the cooling flow path 30 is formed inside the convex portion 2c.
As a result, since the cooling flow path 30 is formed inside the convex portion 2c of the cavity 20, the cooling flow path 30 can be arranged at a position in the convex portion 2c near the cavity 20, so that the cavity 20 can be arranged. Can be cooled efficiently.

Further, as shown in FIGS. 4 and 5, the groove 3a has a cooling piece insertion hole 2a facing the tip surface 3c of the

cooling pieces

3, 31 to 34 or the tip surface 3c of the

cooling pieces

3, 31 to 34. Is formed in.
As a result, the groove 3a is formed in the tip surface 3c of the

cooling pieces

3, 31 to 34 or the cooling piece insertion hole 2a facing the tip surface 3c of the

cooling pieces

3, 31 to 34, whereby the cavity is formed. Since the cooling flow path 30 can be formed in the vicinity of the cavity surface 20a according to the shape of the surface 20a, the molten metal can be cooled efficiently.

[First modification]
The present invention is not limited to the above-described embodiment, and various modifications and modifications can be made within the scope of the technical idea thereof, and the present invention may extend to these modified and modified inventions. Of course. The configurations already described are designated by the same reference numerals and the description thereof will be omitted.
FIG. 8 is a schematic perspective view showing a cooling piece 3A of a first modification of the casting apparatus 1 according to the embodiment of the present invention.

For example, in the above-described embodiment, as shown in FIG. 2, as an example of the cooling piece 3, a straight groove 3a formed on the tip surface 3c has been described as an example, but the present invention is not limited to this. Absent.

Further, as shown in FIG. 8, the groove 3Aa of the tip surface 3Ac of the cooling piece 3A may be formed in a zigzag shape, a meandering shape, or a randomly bent shape.
As a result, the groove 3Aa is formed in a zigzag shape, a meandering shape, or a randomly bent shape, so that the length of the groove 3Aa is formed to be long, and the cooling area can be widened. Therefore, the cooling capacity of the cooling flow path 30A formed by the groove 3Aa can be improved.

[Second modification]
FIG. 9 is a schematic perspective view showing a cooling piece 3B of a second modification of the casting apparatus 1 according to the embodiment of the present invention.

Further, as shown in FIG. 9, a lateral groove 3Bb is formed on the side surface of the cooling piece 3B to form a cooling flow path 30B communicating with a cooling circuit (not shown) by fitting the cooling piece 3B into the cooling piece insertion hole 2a. May be formed.

In this case, the lateral groove 3Bb extends from both ends of the groove 3Ba formed on the tip surface 3Bc of the cooling piece 3B to the front of the seal portion installation portion 3Bd formed on the lower end of the side surface of the cooling piece 3B, respectively. It is drawn into the cooling piece 3B. A seal material O1 made of an O-ring, a gasket, a liquid packing, or the like is provided on the seal portion installation portion 3Bd.

As a result, the cooling piece 3B has the lateral groove 3Bb forming the cooling flow path 30B formed on the side surface thereof, so that the lengths of the groove 3Ba and the lateral groove 3Bb formed on the surface of the cooling piece 3B are lengthened. The cooling area of the cooling flow path 30B can be increased. Therefore, even when the cavity 20 extends to the side of the cooling piece 3B, it can be efficiently cooled by the coolant flowing through the lateral groove 3Bb.

[Third variant]
FIG. 10 is a schematic perspective view showing a cooling piece 3C of a third modification of the casting apparatus 1 according to the embodiment of the present invention.

Further, as shown in FIG. 10, the lateral groove 3Cb formed on the side surface of the cooling piece 3C is concave in a side view formed between the outward path and return path grooves 3Ca formed on the tip surface 3Cc of the cooling piece 3C. It may be a U-turn groove having a shape.

As a result, the coolant flows from the groove 3Ca on the tip surface 3Cc of the cooling piece 3C to the lateral groove 3Cb on the side surface, and then flows again into the groove 3Ca on the tip surface 3Cc side, so that the cooling area of the cooling flow path 30C is widened. be able to. Therefore, the side surface of the convex portion 2c of the mold 2 can be efficiently cooled.

[Fourth variant]
FIG. 11 is a schematic perspective view showing a cooling piece 3D of a fourth modification of the casting apparatus 1 according to the embodiment of the present invention.

Further, as shown in FIG. 11, the lateral grooves 3Db and 3De formed on the side surface of the cooling piece 3D are viewed from the side surface formed between the outward path and the return path grooves 3Da formed on the tip surface 3Dc of the cooling piece 3D. The concave horizontal groove 3Db for the U-turn groove and the lateral groove 3De for the outward path and the return path formed on the opposite side surface of the U-turn groove (horizontal groove 3Db) may be used.
Here, the U-turn groove means a groove formed so as to be folded back.

As a result, in the cooling flow path 30D of the cooling piece 3D through which the coolant flows, the length of the cooling flow path 30D is increased by the horizontal groove 3Db and the horizontal groove 3De, so that the area to be cooled can be increased. Therefore, the side surface of the convex portion 2c of the mold 2 can be efficiently cooled.

[Fifth variant]
12A and 12B are views showing a cooling piece 3E of a fifth modification of the casting apparatus 1 according to the embodiment of the present invention. FIG. 12A is an enlarged schematic perspective view of a main part, and FIG. 12B is an enlarged schematic sectional view of a main part. is there.

Further, in the embodiment and the first to fourth modifications, the grooves 3a, 3Aa, 3Ba, 3Ca, and 3Da are recessed in the tip surfaces 3c, 3Ac, 3Bc, 3Cc, and 3Dc of the

cooling pieces

3, 3A to 3D. Although it has been explained that a part of the

cooling channels

30, 30A to 30D is formed, the grooves 3a, 3Aa to 3Da may not be provided. In that case, as shown in FIG. 12, a gap S (space) is formed between the tip surface 3Ec of the cooling piece 3E and the inner bottom surface of the cooling piece insertion hole 2a, and the gap S is used as a cooling flow path. It may be a part of 30E.

Therefore, the cooling piece 3E may have a simple shape as long as the tip surface 3Ec has a discharge port 3Ek and an inlet port 3Em which are the opening ends of the supply path 3Eh and the outflow path 3Ei. Further, since it is not necessary to form a groove for forming the cooling flow path 30E on the inner bottom surface of the cooling piece insertion hole 2a facing the tip surface 3Ec of the cooling piece 3E, if it is formed in a simple hole shape. Good.

[Other variants]
The slide core 27 described in the above embodiment may be a part of the mold 2, and may be a movable core (slide core) movable to the cavity 20, a fixed mold 22 or a movable mold 21. It may be a horizontal type arranged on the side of.

Further, the cooling piece insertion holes 2a formed in the movable insert 23, the slide core 27, etc. without recessing the grooves 3a, 3Aa to 3Da in the tip surfaces 3c, 3Ac to 3Dc of the

cooling pieces

3, 3A to 3D. A groove may be formed on the inner wall surface (inner bottom surface), and the groove may be a part of the

cooling channels

30, 30A to 30D.

Further, in the embodiment and the first to fifth modified examples, as an example of the

cooling pieces

3, 3A to 3E, a substantially square pillar shape has been described as an example, but the present invention is not limited to this. The cooling

pieces

3, 3A to 3E may have, for example, a substantially cylindrical shape or a substantially polygonal column shape.

1 Casting equipment 2 Mold 2a Cooling piece insertion hole 2b Inner wall surface

2c Convex part

3,3A, 3B, 3C, 3D, 3E, 31, 32, 33, 34 Cooling piece 3a, 3Aa, 3Ba, 3Ca, 3Da Groove 3b, 3d, 3Bb, 3Cb, 3Db, 3De Horizontal groove 3c, 3Ac, 3Bc, 3Cc, 3Dc, 30Ec Tip surface 4 Casting product 20 Cavity 21 Movable type 22 Fixed type 23 Movable insert 27

Slide core

30, 30A, 30B, 30C, 30D, 30E Cooling channel

Claims

A casting device that casts a casting by pouring molten metal into a cavity formed in a mold.
The mold has a cooling piece insertion hole recessed toward the cavity on a surface different from the surface on which the cavity is formed.
It has a cooling piece inserted into the cooling piece insertion hole, and has
By fitting the cooling piece into the cooling piece insertion hole, a cooling flow path for flowing a cooling medium is formed between the cooling piece and the inner wall surface of the cooling piece insertion hole.
A casting machine characterized by.
A groove forming the cooling flow path is recessed on the tip surface of the cooling piece.
The casting apparatus according to claim 1.
The cooling piece shall be made of metal, resin, or rubber.
The casting apparatus according to claim 1 or 2.
A convex portion is formed in the cavity.
The cooling flow path is formed inside the convex portion.
The casting apparatus according to claim 1 or 2.
The groove is formed in the tip surface of the cooling piece or the cooling piece insertion hole facing the tip surface of the cooling piece.
2. The casting apparatus according to claim 2.
A horizontal groove is formed on the side surface of the cooling piece to form the cooling flow path communicating with the cooling circuit by fitting the cooling piece into the cooling piece insertion hole.
The casting apparatus according to any one of claims 1 to 5, wherein the casting apparatus is characterized.
The groove is formed in a zigzag shape, a meandering shape, or a randomly bent shape.
The casting apparatus according to claim 2 or 5.