US 12,070,790 B2
Mold and method of manufacturing the same
Hiroki Itoi, Tokyo (JP); Takashi Nagatomo, Gunman (JP); and Makoto Tanaka, Gunma (JP)
Assigned to G-TEKT CORPORATION, Saitama (JP)
Appl. No. 17/631,285
Filed by G-TEKT CORPORATION, Saitama (JP)
PCT Filed Aug. 3, 2020, PCT No. PCT/JP2020/029655
§ 371(c)(1), (2) Date Jan. 28, 2022,
PCT Pub. No. WO2021/020589, PCT Pub. Date Feb. 4, 2021.
Claims priority of application No. 2019-141974 (JP), filed on Aug. 1, 2019.
Prior Publication US 2022/0250134 A1, Aug. 11, 2022
Int. Cl. B21D 37/16 (2006.01); B21D 22/02 (2006.01); B21D 37/14 (2006.01)
CPC B21D 37/16 (2013.01) [B21D 22/022 (2013.01); B21D 37/14 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A mold comprising
a mold main body including a molding face, a back face located on an opposite side to the molding face, and a columnar body protruding from the back face, the mold main body formed with a substantially constant thickness except the columnar body,
a support base including a mounting surface which contacts the back face of the mold main body, and a recessed mounting seat, the support base to which the mold main body is fixed as the columnar body overlap the mounting seat, and
a refrigerant passage through which a refrigerant for cooling the molding face of the mold main body flows,
wherein the refrigerant passage is composed of a groove formed in the mounting surface of the support base and the mold main body which covers the groove, the groove extending along the mounting surface avoiding the mounting seat to which the columnar body is mounted,
the groove includes a plurality of straight portions which extend linearly between a pair of side surfaces, and a plurality of bent portions each of which is bent and connected to the two ends of the corresponding straight portions,
the straight portions are aligned at an interval in a direction perpendicular to a direction along which the straight portions extend,
each of the bent portions connects a couple of the straight portions which are adjacent to each other such that the refrigerant flows through the plurality of straight portions,
the plurality of straight portions and the plurality of bent portions form a single refrigerant passage from an inlet side to an outlet side,
the columnar body is formed in the mold main body to form a part of the mold main body,
a tip surface of the columnar body is flat,
the mounting seat is formed at a position lower than the mounting surface and used to fix the mold main body on the support base, and is formed flat so as to be in close contact with the tip surface of the columnar body in a state where the mold main body is attached to the support base, and
a space between the mounting surface of the support base and the mounting seat is formed in a shape in which the columnar body fits.