US 11,986,880 B2
Casting device
Hiroyuki Nakashima, Saitama (JP)
Assigned to Metts Corporation, Saitama (JP)
Appl. No. 17/594,897
Filed by Metts Corporation, Saitama (JP)
PCT Filed May 18, 2020, PCT No. PCT/JP2020/019639
§ 371(c)(1), (2) Date Nov. 2, 2021,
PCT Pub. No. WO2020/230903, PCT Pub. Date Nov. 19, 2020.
Claims priority of application No. 2019-092929 (JP), filed on May 16, 2019.
Prior Publication US 2022/0193763 A1, Jun. 23, 2022
Int. Cl. B22D 29/04 (2006.01); B22C 9/06 (2006.01); B22D 18/06 (2006.01)
CPC B22D 29/04 (2013.01) [B22C 9/06 (2013.01); B22D 18/06 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A casting device comprising:
a mold having a cavity into which a melt is to be fed and an insertion hole communicating with the cavity;
an extrusion pin slidably inserted into the insertion hole and configured to move into the cavity to release a casted product; and
a depressurized space creator configured to create a depressurized space on a reverse side of a cavity surface facing the cavity to define the cavity,
wherein the depressurized space creator covers an opening of the insertion hole,
wherein the depressurized space creator has an extrusion pin insertion hole, through which the extrusion pin extending from the insertion hole is inserted,
wherein the depressurized space creator is arranged with a sealing member having a sealing hole which communicates with the extrusion pin insertion hole and through which the extrusion pin is inserted,
wherein the extrusion pin has a radial dimension and an expanded diameter portion having a larger radial dimension than the radial dimension of the extrusion pin,
wherein the radial dimension of the extrusion pin is smaller than a radial dimension of the sealing hole and the radial dimension of the expanded diameter portion is larger than the radial dimension of the sealing hole,
wherein when the extrusion pin moves backward, the expanded diameter portion is configured to press the sealing member to close the sealing hole, so that the depressurized space is sealed,
wherein the sealing member has an inner periphery defining the sealing hole,
wherein the expanded diameter portion projects radially outward from the inner periphery of the sealing member, wherein a remainder of the extrusion pin except for the expanded diameter portion is radially inward away from the inner periphery of the sealing member.
 
5. A casting device comprising:
a mold having a cavity into which a melt is to be fed and an insertion hole communicating with the cavity;
an extrusion pin slidably inserted into the insertion hole and configured to move into the cavity to release a casted product; and
a depressurized space creator configured to create a depressurized space on a reverse side of a cavity surface facing the cavity to define the cavity,
wherein the depressurized space creator covers an opening of the insertion hole,
wherein the depressurized space creator has an extrusion pin insertion hole, through which the extrusion pin extending from the insertion hole is inserted,
wherein the depressurized space creator is arranged with a sealing member having a sealing hole which communicates with the extrusion pin insertion hole and through which the extrusion pin is inserted,
wherein the sealing member is formed of a tubular member having the sealing hole, and the depressurized space creator includes:
a depressurized space creating member having the extrusion pin insertion hole and creating the depressurized space; and
a sealing member holding plate which has a sealing member mounting hole for mounting the sealing member and is provided behind the depressurized space creating member.
 
7. A casting device comprising:
a mold having a cavity into which a melt is to be fed and an insertion hole communicating with the cavity;
an extrusion pin slidably inserted into the insertion hole and configured to move into the cavity to release a casted product; and
a depressurized space creator configured to create a depressurized space on a reverse side of a cavity surface facing the cavity to define the cavity,
wherein the depressurized space creator covers an opening of the insertion hole,
wherein the depressurized space creator has an extrusion pin insertion hole, through which the extrusion pin extending from the insertion hole is inserted,
wherein the depressurized space creator is arranged with a sealing member having a sealing hole which communicates with the extrusion pin insertion hole and through which the extrusion pin is inserted,
wherein the extrusion pin has an expanded diameter portion having an expanded diameter, and when the extrusion pin moves backward, the expanded diameter portion is configured to press the sealing member to close the sealing hole, so that the depressurized space is sealed,
wherein the sealing member is formed of a plate-shaped member having the sealing hole, and
wherein the depressurized space creator includes:
a depressurized space creating member which has the extrusion pin insertion hole and creates the depressurized space; and
a sealing member holding plate which has an expanded-diameter-portion-insertion-hole in which the expanded diameter portion is inserted and which holds the sealing member disposed on a ceiling surface of the depressurized space creating member for the depressurized space.