US 12,403,637 B2
Molding die for molding an endless-shaped gasket made of an elastic material along a surface of a plate-like base material
Shun Murasaki, Kikugawa (JP); and Bunpei Yoshida, Fujisawa (JP)
Assigned to NOK CORPORATION, (JP)
Appl. No. 17/779,632
Filed by NOK CORPORATION, Tokyo (JP)
PCT Filed Oct. 27, 2020, PCT No. PCT/JP2020/040250
§ 371(c)(1), (2) Date May 25, 2022,
PCT Pub. No. WO2021/145047, PCT Pub. Date Jul. 22, 2021.
Claims priority of application No. 2020-004890 (JP), filed on Jan. 16, 2020.
Prior Publication US 2023/0001613 A1, Jan. 5, 2023
Int. Cl. B29C 45/00 (2006.01); B29C 33/42 (2006.01); B29C 45/14 (2006.01); B29C 45/27 (2006.01); B29C 45/34 (2006.01); B29C 45/38 (2006.01); H01M 8/0276 (2016.01); H01M 8/0286 (2016.01); B29K 21/00 (2006.01); B29L 31/26 (2006.01)
CPC B29C 45/0025 (2013.01) [B29C 33/42 (2013.01); B29C 45/14336 (2013.01); B29C 45/2708 (2013.01); B29C 45/34 (2013.01); B29C 45/38 (2013.01); H01M 8/0276 (2013.01); H01M 8/0286 (2013.01); B29C 2045/14459 (2013.01); B29K 2021/00 (2013.01); B29L 2031/265 (2013.01); Y02E 60/50 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A molding die for molding, on a surface of a plate-like base material, an endless-shaped gasket made of an elastic material and extending along the surface of the plate-like base material comprising:
a cavity portion formed on an opposing surface of the molding die opposed to the surface of the base material and having a mold shape corresponding to the endless shape of the gasket;
a gate having a frusto-conically shaped cross-section extending toward the cavity portion in the molding die and configured to introduce a flowable molding material, which is cured to become the elastic material, into the cavity portion;
a first intermediate portion configured to receive the molding material from the gate and feeding to the cavity portion, wherein the first intermediate portion includes a first annular bottom surface and a first cylindrical surface, the first annular bottom surface being connected to and extending radially outward from an opening of the gate that is connected to the cavity portion such that the first annular bottom surface is configured to face the surface of the plate-like base material, and the first cylindrical surface is connected to the first annular bottom surface and extends in a direction toward the surface of the plate-like base material, wherein a cross section of the first intermediate portion along the surface of the base material has a cross-sectional area equal to or larger than an opening area of the opening of the gate;
a vent having a frusto-conically shaped cross-section extending in a direction away from the cavity portion in the molding die and configured to discharge an unnecessary gas unnecessary for molding the gasket in the cavity portion from the cavity portion; and
a second intermediate portion configured to receive the unnecessary gas from the cavity portion and feeding to the vent, wherein the second intermediate portion includes a second annular bottom surface and a second cylindrical surface, the second angular bottom surface being connected to an extending radially outward from an opening of the vent that is connected to the cavity portion such that the second annular bottom surface is configured to face the surface of the plate-like base material, and the second cylindrical surface is connected to the second annular bottom surface and extends in a direction toward the surface of the plate-like base material, wherein a cross section of the second intermediate portion along the surface of the base material has a cross-sectional area equal to or larger than an opening area of the opening of the vent.