Insert Casting Equipment

Abstract

To provide an insert-casting apparatus capable of enhancing a degree of freedom of arrangement of an insert object material.SOLUTION: An insert-casting apparatus comprises: a stationary mold 10 including a concave portion 13 recessed in a first direction from a molten metal contact surface; and a holding unit 30 for an insert object material 201 in the concave portion 13. The holding unit comprises: a first magnetic body 31 including a first magnetic body first surface 31a and a first magnetic body second surface 31b; a magnet 32 including a magnet first surface 32a and a magnet second surface 32b both of which contact the first magnetic body second surface 31b; a first non-magnetic body 33 which includes a first non-magnetic body first surface 33a and a first non-magnetic body second surface 33b, and surrounds both of the magnet 32 and the first magnetic body 31 centered on a first direction; a second magnetic body 34 which includes a second magnetic body first surface 34a and a second magnetic body second surface 34b, surrounds the first non-magnetic body 33 centered on the first direction, and covers at least a part of the magnet second surface 32b and at least a part of the first non-magnet body second surface 33b; and a second non-magnetic body 35 covering at least a part of the second magnetic body second surface 34b around the second magnetic body 34 centered on the first direction.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a cast-in insert casting apparatus. [Background technology]

[0002] Conventionally, there is known a casting method in which molten metal for the cast-in-wrap material is poured into a mold in which a cast-in-wrap material is placed, and the cast-in-wrap material is cast integrally with the cast-in-wrap material (for example, Patent Document 1). The cast-in-wrap material is placed and fixed in a recess formed in the mold, for example. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2000-084650 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned method of placing the cast-in-wrap material in a recess formed in the mold, there is a risk that the position of the cast-in-wrap material may shift if the cast-in-wrap material is placed on a vertical surface of the mold, for example. [Means for solving the problem]

[0005] The present disclosure can be realized in the following forms. According to one embodiment of the present disclosure, there is provided a cast-in insert casting apparatus, which includes a mold having a recess formed by recessing in a first direction from a surface in contact with molten metal, a holding unit that is accommodated in the recess and holds a cast-in insert material, and a bolt made of a magnetic material that is fixed to a bottom of the recess, the holding unit having a first magnetic body having a first magnetic body first surface exposed to the outside where the cast-in insert material is placed and a first magnetic body second surface opposed to the first magnetic body first surface, a magnet having a magnet first surface abutting the first magnetic body second surface and a magnet second surface opposed to the magnet first surface, a first non-magnetic body first surface exposed to the outside and a first non-magnetic body second surface opposed to the first non-magnetic body first surface, and the magnet and the The holding unit has a first non-magnetic body surrounding a first magnetic body, a second magnetic body first surface exposed to the outside, and a second magnetic body second surface facing the second magnetic body first surface, and surrounds the first non-magnetic body centered in the first direction and covers at least a portion of the magnet second surface and at least a portion of the first non-magnetic body second surface, and a second non-magnetic body surrounding the second magnetic body centered in the first direction and covers at least a portion of the second magnetic body second surface, wherein a through hole through which the bolt is inserted is formed in each of the second magnetic body and the second non-magnetic body, and the holding unit is fixed to the mold by the magnetic force between the magnet and the bolt inserted into the through hole.

[0006] According to one embodiment of the present disclosure, there is provided a cast-in insert casting apparatus, which includes a mold having a recess formed by recessing in a first direction from a surface in contact with molten metal, and a holding unit that is accommodated in the recess and holds a cast-in insert material, the holding unit including a first magnetic body having a first magnetic body first surface exposed to the outside where the cast-in insert material is placed and a first magnetic body second surface opposed to the first magnetic body first surface, a magnet having a magnet first surface abutting the first magnetic body second surface and a magnet second surface opposed to the magnet first surface, a first non-magnetic body first surface exposed to the outside and a second non-magnetic body second surface opposed to the first non-magnetic body first surface. The casting mold has a first non-magnetic body and a second non-magnetic body surface, and the first non-magnetic body surrounds the magnet and the first magnetic body centered in the first direction, a second magnetic body first surface exposed to the outside, and a second magnetic body second surface facing the second magnetic body first surface, and the second magnetic body surrounds the first non-magnetic body centered in the first direction and covers at least a part of the magnet second surface and at least a part of the first non-magnetic body second surface, and the second non-magnetic body surrounds the second magnetic body centered in the first direction and covers at least a part of the second magnetic body second surface. According to this embodiment, a magnetic circuit is formed in which the magnetic flux generated by the magnet passes through the first magnetic body and the second magnetic body, so that the cast-in-wrap material can be held by magnetic force. Therefore, regardless of the direction of the surface on which the cast-in-wrap material is arranged, the cast-in-wrap material can be held while suppressing positional deviation. Therefore, the degree of freedom of arrangement of the cast-in-wrap material in the mold can be improved. [Brief description of the drawings]

[0007] [Figure 1] FIG. 2 is a perspective view of a casting produced using the casting apparatus according to the embodiment. [Diagram 2] 2 is a cross-sectional view taken along line II-II of FIG. 1, shown together with an object to be welded. [Diagram 3] FIG. 2 is a cross-sectional view of the casting device shown with iron tacks. [Figure 4] FIG. 4 is a perspective view showing a part of a cross section of a holding unit. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] A. Embodiment: FIG. 1 is a perspective view of a casting 200 cast using a casting apparatus 100 as a cast-in casting apparatus according to the present embodiment. FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1, together with an object 210 to be welded. In detail, FIG. 2 is a cross-sectional view taken along a line passing through the center of an iron rivet 201 hatched in FIG. 1. As shown in FIG. 1, the casting 200 has a box shape with one side open. The casting 200 has six iron rivets 201 as cast-in-wrap materials and a cast-in-wrap material 202. In this embodiment, the cast-in-wrap material 202 is aluminum, but the material of the cast-in-wrap material 202 is not limited to aluminum. The six iron rivets 201 are provided on three of the five sides of the casting 200. Two iron rivets 201 are provided on each side. As shown in FIG. 2, the iron rivets 201 are provided so as to be exposed on the front and back sides of the casting 200. The casting 200 is used by being welded to an object 210 to be welded. In this embodiment, the object 210 to be welded is a press-formed iron plate. The casting 200 is used by being joined to the object 210 to be welded by spot welding an iron rivet 201 and the object 210 to be welded.

[0009] FIG. 3 is a cross-sectional view of the casting device 100 shown with the iron tack 201. FIG. 4 is a perspective view showing a partial cross section of the holding unit 30. As shown in FIG. 3, the casting device 100 has a fixed mold 10 as a casting mold, a movable mold 20, and a holding unit 30. The fixed mold 10 and the movable mold 20 are made of metal. Molten metal to be the casting insert 202 is pressed into a gap 40 between the fixed mold 10 and the movable mold 20. In this embodiment, a die casting method is used, but other casting methods such as gravity casting may be used. The fixed mold 10 has a recess 13 and an opposing recess 14. The recess 13 is formed by recessing from a surface 11 of the fixed mold 10 that contacts the molten metal in a first direction DT of the fixed mold 10. In this embodiment, the surface 11 is arranged along a substantially vertical direction. The opposing recess 14 is formed by recessing from an opposing surface 12 that faces the surface 11 of the fixed mold 10 toward the surface 11. The recess 13 and the opposing recess 14 are cylindrical and formed coaxially. A through hole penetrating in the first direction DT is formed in the partition between the bottom of the recess 13 and the bottom of the opposing recess 14. A bolt 16 made of a magnetic material is fixed to the fixed mold 10 by threaded engagement in the through hole.

[0010] The holding unit 30 is accommodated in the recess 13 of the fixed mold 10. The holding unit 30 holds the iron rivet 201. In this embodiment, the iron rivet 201 is about 10 g. The holding unit 30 has a first magnetic body 31, a magnet 32, a first non-magnetic body 33, a second magnetic body 34, and a second non-magnetic body 35. Each member such as the first magnetic body 31 and the magnet 32 ​​is fixed to each other by at least one of fitting and adhesion. In this embodiment, an inorganic adhesive is used as the adhesive used for adhesion, but other adhesives may be used. The holding unit 30 is fixed to the fixed mold 10 by the magnetic force of the magnet 32 ​​and the bolt 16. Furthermore, a female thread that engages with the male thread of the bolt 16 is formed on the inner circumferential surface of the through hole of the second magnetic body 34 described later, and the holding unit 30 may be fixed to the fixed mold 10 by threaded engagement with the bolt 16 fixed to the fixed mold 10.

[0011] The first magnetic body 31 is formed of a magnetic material. In this embodiment, the first magnetic body 31 is formed of S45C carbon steel, but may be formed of other magnetic materials. As shown in FIG. 4, the first magnetic body 31 has a shape in which two cylindrical members with different outer diameters are combined, with the central axis being arranged along the first direction DT. As shown in FIG. 3, the first magnetic body 31 has a first magnetic body first surface 31a exposed to the outside (cast-wrapped material arrangement area) where the iron rivet 201, which is the cast-wrapped material, is arranged, and a first magnetic body second surface 31b facing the first magnetic body first surface 31a. The outer diameter of the first magnetic body first surface 31a is smaller than the outer diameter of the first magnetic body second surface 31b. As will be described later, the first magnetic body 31 has a function of passing the magnetic flux generated by the magnet 32. If the length of the first magnetic body 31 in the first direction DT is long, the magnetic flux will be attenuated. Therefore, it is preferable that the length of the first magnetic body 31 in the first direction DT is approximately equal to the length of the magnet 32 ​​or shorter.

[0012] The magnet 32 ​​is disposed adjacent to the first magnetic body 31 in the first direction DT. Specifically, the magnet 32 ​​is disposed adjacent to the first magnetic body 31 at a position opposite to the region where the cast-wrapped material is disposed, sandwiching the first magnetic body 31 in the first direction DT. The magnet 32 ​​has a cylindrical shape and is disposed so that the central axis is along the first direction DT. In this embodiment, the size of the magnet 32 ​​is about 6 mm in diameter and about 8 mm in length. The magnet 32 ​​has a magnet first surface 32a that contacts the first magnetic body second surface 31b, and a magnet second surface 32b that faces the magnet first surface 32a. The shape of the magnet 32 ​​is not limited to a cylinder, and may be, for example, a cylindrical shape, but a cylindrical shape is preferable because it can increase the magnetic force. A permanent magnet or an electromagnet can be used as the magnet 32, and a permanent magnet is used in this embodiment. Furthermore, when a permanent magnet is used for the magnet 32, the type of the magnet 32 ​​is preferably a magnet having a Curie temperature higher than the heat receiving temperature to which the magnet 32 ​​is subjected in the casting process. In this embodiment, the fixed mold 10 is heated to about 500°C. In this embodiment, in which aluminum is used as the casting insert material 202, examples of magnets having a Curie temperature higher than the heat receiving temperature include samarium cobalt magnets and alnico magnets. In this embodiment, an alnico magnet is used as the magnet 32. The magnet 32 ​​is arranged so that the N pole and the S pole are aligned along the first direction DT. The arrangement of the magnet 32 ​​may be either an arrangement in which the N pole is on the magnet first surface 32a side or an arrangement in which the N pole is on the magnet second surface 32b side. In this embodiment, the magnet is arranged so that the magnet second surface 32b side is the N pole and the magnet first surface 32a side is the S pole.

[0013] The first non-magnetic body 33 is formed of a non-magnetic material. In this embodiment, the first non-magnetic body 33 is formed of SUS316 stainless steel, but may be formed of other non-magnetic materials. The first non-magnetic body 33 has a generally cylindrical shape. The first non-magnetic body 33 has a first non-magnetic body first surface 33a exposed to the outside and a first non-magnetic body second surface 33b facing the first non-magnetic body first surface 33a. The first non-magnetic body 33 surrounds the magnet 32 ​​and the first magnetic body 31 centered on the first direction DT. The inner diameter of the inner peripheral surface of the first non-magnetic body 33 is formed smaller on the first non-magnetic body first surface 33a side than on the first non-magnetic body second surface 33b side so as to fit with the outer peripheral surface of the first magnetic body 31.

[0014] The second magnetic body 34 is formed of a magnetic material. In this embodiment, the second magnetic body 34 is formed of S45C carbon steel like the first magnetic body 31, but may be formed of other magnetic materials. The second magnetic body 34 has a generally bottomed cylindrical shape. The second magnetic body 34 has a second magnetic body first surface 34a exposed to the outside and a second magnetic body second surface 34b facing the second magnetic body first surface 34a. The second magnetic body 34 surrounds the first non-magnetic body 33 centered on the first direction DT at the cylindrical portion. The second magnetic body 34 covers at least a part of the magnet second surface 32b and at least a part of the first non-magnetic body second surface 33b at the bottom portion. A through hole through which the bolt 16 is inserted is formed at the bottom portion of the second magnetic body 34. The bottom portion of the second magnetic body 34 other than the through hole covers the second magnet surface 32b of the magnet 32 ​​and the first non-magnetic body second surface 33b.

[0015] The second non-magnetic body 35 is formed of a non-magnetic material. In this embodiment, the second non-magnetic body 35 is formed of SUS316 stainless steel like the first non-magnetic body 33, but may be formed of other non-magnetic materials. The second non-magnetic body 35 has a generally cylindrical shape with a bottom. The second non-magnetic body 35 surrounds the second magnetic body 34 centered on the first direction DT and covers at least a part of the second magnetic body second surface 34b. Specifically, the second non-magnetic body 35 surrounds the second magnetic body 34 centered on the first direction DT with the cylindrical part of the second non-magnetic body 35. The second non-magnetic body 35 covers at least a part of the second magnetic body second surface 34b with the bottom part. A through hole through which the bolt 16 is inserted is formed in the bottom part of the second non-magnetic body 35. The second magnetic body second surface 34b is covered with the bottom part of the second non-magnetic body 35 other than the through hole part.

[0016] As described above, the first magnetic body 31 is disposed on the magnet first surface 32a side of the magnet 32. The second magnetic body 34 is disposed so as to surround the magnet 32 ​​except for the magnet first surface 32a. The first non-magnetic body 33 is disposed between the outer peripheral surface of the magnet 32 ​​and the inner peripheral surface of the second non-magnetic body 35. This forms a magnetic circuit in which the magnetic flux generated by the magnet 32 ​​passes through the first magnetic body 31 and the second magnetic body 34. The first magnetic body 31 is disposed adjacent to the magnet first surface 32a of the magnet 32. Therefore, the first magnetic body 31 behaves like a magnet with the first magnetic body first surface 31a side as the S pole. Similarly, the second magnetic body 34 is disposed adjacent to the magnet second surface 32b of the magnet 32. Therefore, the second magnetic body 34 behaves like a magnet with the second magnetic body first surface 34a side as the N pole. Therefore, the magnetic flux generated by the magnet 32 ​​can be concentrated on the path from the second magnetic body first surface 34a to the first magnetic body first surface 31a, so that the holding force of the iron rivet 201 using the magnetic force can be increased. In addition, since the first magnetic body 31 is disposed between the magnet 32 ​​and the iron rivet 201, direct contact between the magnet 32 ​​and the molten metal is avoided, and demagnetization of the magnet 32 ​​due to heat can be suppressed. In addition, since an alnico magnet with high heat resistance is used as the magnet 32 ​​in this embodiment, demagnetization due to heat in the casting process can be suppressed. In addition, since the outer periphery of the second magnetic body 34 is covered with the second non-magnetic body 35, leakage of magnetic flux to the fixed mold 10 can be suppressed, and the holding force of the iron rivet 201 using the magnetic force can be increased.

[0017] According to the embodiment described above, the first magnetic body 31 is disposed on the magnet first surface 32a side of the magnet 32, and the second magnetic body 34 is disposed with the first non-magnetic body 33 interposed therebetween so as to surround the periphery of the magnet 32. This forms a magnetic circuit in which the magnetic flux generated by the magnet 32 ​​passes through the first magnetic body 31 and the second magnetic body 34, and the holding force of the iron stud 201 using magnetic force can be increased. Therefore, regardless of the direction of the surface on which the cast-in-wrapped material is disposed, the cast-in-wrapped material can be held while suppressing misalignment, thereby improving the degree of freedom in arranging the cast-in-wrapped material in the mold.

[0018] B. Other embodiments: (B1) In the above embodiment, the casting 200 is described as being box-shaped. The shape of the casting 200 is not limited to being box-shaped. The surface 11 of the fixed mold 10 on which the holding unit 30 is arranged is not limited to being a surface along the vertical direction. The orientation of the surface 11 with respect to the vertical direction is not limited, and may be, for example, a ceiling surface where the surface 11 faces downward in the vertical direction, a horizontal surface, or a sloped surface inclined with respect to the horizontal direction. The surface 11 of the fixed mold 10 on which the holding unit 30 is arranged is not limited to being a flat surface, and may be a curved surface. In the above embodiment, an iron rivet 201 is arranged as a cast-in-wrap material between the fixed mold 10 and the movable mold 20. The arrangement of the cast-in-wrap material is not limited to the above embodiment, and the above-mentioned holding unit 30 can be applied, for example, even when the cast-in-wrap material is arranged between the fixed mold 10 and the insert.

[0019] (B2) In the above embodiment, the iron rivet 201 as the cast-in-wrap material weighs about 10 g, and the size of the magnet 32 ​​is about 6 mm in diameter and about 8 mm in length. The mass of the cast-in-wrap material and the size of the magnet are not limited. The size of each part constituting the holding unit, such as the magnet 32, may be determined according to the mass of the cast-in-wrap material.

[0020] The present disclosure is not limited to the above-mentioned embodiment, and can be realized in various configurations without departing from the spirit of the present disclosure. For example, the technical features of the embodiments corresponding to the technical features in each aspect described in the Summary of the Invention can be appropriately replaced or combined to solve some or all of the above-mentioned problems or to achieve some or all of the above-mentioned effects. Furthermore, if a technical feature is not described as essential in this specification, it can be appropriately deleted. [Explanation of symbols]

[0021] 10...Fixed mold, 11...Surface, 12...Opposite surface, 13...Recess, 14...Opposite recess, 16...Bolt, 20...Movable mold, 30...Retaining unit, 31...First magnetic body, 31a...First surface of first magnetic body, 31b...Second surface of first magnetic body, 32...Magnet, 32a...First surface of magnet, 32b...Second surface of magnet, 33...First non-magnetic body, 33a...First surface of first non-magnetic body, 33b...Second surface of first non-magnetic body, 34...Second magnetic body, 34a...First surface of second magnetic body, 34b...Second surface of second magnetic body, 35...Second non-magnetic body, 40...Gap, 100...Casting device, 200...Cast, 201...Iron rivet, 202...Cast-in insert material, 210...Object to be welded, DT...First direction

Claims

[Claim 1] A cast-in insert casting apparatus comprising: a mold having a recess formed in a first direction from a surface that contacts the molten metal; A holding unit that is accommodated in the recess and holds the workpiece; A bolt made of a magnetic material and fixed to a bottom of the recess, The holding unit includes: A first magnetic body having a first magnetic body first surface exposed to the outside where the cast-in-wrap material is placed and a first magnetic body second surface opposed to the first magnetic body first surface; a magnet having a magnet first surface that contacts the first magnetic body second surface and a magnet second surface that faces the magnet first surface; a first non-magnetic body having a first surface of the first non-magnetic body exposed to the outside and a second surface of the first non-magnetic body facing the first surface of the first non-magnetic body, the first non-magnetic body surrounding the magnet and the first magnetic body centered in the first direction; a second magnetic body having a second magnetic body first surface exposed to the outside and a second magnetic body second surface facing the second magnetic body first surface, surrounding the first non-magnetic body centered on the first direction, and covering at least a part of the magnet second surface and at least a part of the first non-magnetic body second surface; a second non-magnetic body that surrounds the second magnetic body centered in the first direction and covers at least a portion of a second surface of the second magnetic body, a through hole through which the bolt is inserted is formed in each of the second magnetic body and the second non-magnetic body, The holding unit is fixed to the mold by a magnetic force between the magnet and the bolt inserted into the through hole.

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