US 11,981,053 B2
Compression molding device
Akio Sato, Tokyo (JP); Yoshihiro Kaitsuka, Kanagawa (JP); Shin Nakamura, Kanagawa (JP); Keitaro Hayashi, Kanagawa (JP); Hiroshi Takahashi, Kanagawa (JP); Mitsuo Kumata, Kanagawa (JP); Yukihito Nozaki, Kanagawa (JP); Tomoho Kikuchi, Kanagawa (JP); and Kunihiko Hatazawa, Kanagawa (JP)
Assigned to NIPPON CLOSURES CO., LTD., Tokyo (JP); and TOYO SEIKAN GROUP ENGINEERING CO., LTD., Kanagawa (JP)
Appl. No. 17/413,293
Filed by NIPPON CLOSURES CO., LTD., Tokyo (JP); and Toyo Seikan Group Engineering Co., Ltd., Kanagawa (JP)
PCT Filed Dec. 9, 2019, PCT No. PCT/JP2019/048043
§ 371(c)(1), (2) Date Jun. 11, 2021,
PCT Pub. No. WO2020/122002, PCT Pub. Date Jun. 18, 2020.
Claims priority of application No. 2018-232116 (JP), filed on Dec. 12, 2018.
Prior Publication US 2022/0063141 A1, Mar. 3, 2022
Int. Cl. B29C 33/24 (2006.01); B29C 43/08 (2006.01); B29C 43/32 (2006.01); B29C 43/36 (2006.01)
CPC B29C 33/24 (2013.01) [B29C 43/08 (2013.01); B29C 2043/3283 (2013.01); B29C 2043/3694 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A compression molding device comprising:
a plurality of molding means each comprising a one-side mold assembly and an opposite-side mold assembly, the one-side mold assembly and the opposite-side mold assembly being free to move toward and away from each other between a closed state where the one-side mold assembly and the opposite-side mold assembly collaboratively compression-mold an article, and an open state where the one-side mold assembly and the opposite-side mold assembly are located apart from each other; and
a rotating support to be rotationally driven, the plurality of molding means being mounted to the rotating support at circumferential intervals,
wherein, for each the plurality of molding means,
the one-side mold assembly has one-side mold assembly moving means attached thereto,
the opposite-side mold assembly has opposite-side mold assembly moving means attached thereto,
the one-side mold assembly moving means includes a toggle link mechanism including two links, and toggle link mechanism operating means including a cam following link mechanism having a plurality of links,
the opposite-side mold assembly moving means includes a hydraulic cylinder mechanism, and
when the one-side mold assembly and the opposite-side mold assembly are to be brought from the open state into the closed state:
the one-side mold assembly is first moved toward the opposite-side mold assembly by the one-side mold assembly moving means, whereby the one-side mold assembly and the opposite-side mold assembly are brought close to a state proximate to the closed state to establish a nearly closed state, so that the two links of the toggle link mechanism in the one-side mold assembly moving means are located on a straight line; and
the opposite-side mold assembly is then moved toward the one-side mold assembly by the opposite-side mold assembly moving means to establish the closed state, whereupon
a compression molding force exerted by the opposite-side mold assembly moving means is transmitted to the toggle link mechanism via the opposite-side mold assembly and the one-side mold assembly, but is not transmitted to the toggle link mechanism operating means,
wherein, in the nearly closed state and the closed state, the plurality of links of the cam following link mechanism are located on a first line, and the two links of the toggle link mechanism are located on a second line, the first and second lines deviating from each other in a diametrical direction.