Bridgestone Corporation

Toyota Boshoku Kabushiki Kaisha

Yoichi Nabeshima

Keiichiro Tabata

Yoshiyuki Takahashi

Masatoshi Sato

Tatsuo Yata

Shin Tada

Torao Hashimoto

Kazufumi Yokoyama

Taikyu Fujita

Toshiyuki Horimatsu

Yasuomi Tanaoka

Mariko Wada

Akihiro Kawashima

Hirokazu Hirano

Masatoshi Satou

A foam molded article mold includes a lower mold with a cavity space; an upper mold formed with an upper mold face portion facing a lower mold face portion of the cavity space when the upper mold has been brought together with the lower mold; a partitioning wall that projects out from the upper mold face portion, and that configures a first parting line between the partitioning wall and the lower mold face portion in a state in which the upper mold has been brought together with the lower mold; and a partition that projects out from the lower mold face portion, and that, in a state in which the upper mold has been brought together with the lower mold, partitions the cavity space together with the partitioning wall to form plural cavities, and that configures a second parting line between the partition and the partitioning wall.

Foam molded article mold and foam molded article

A molded foam member manufacturing method including: a first process of placing a foam molded first portion and a rigid member in a second portion forming mold, and pressing and fixing the rigid member against the second portion forming mold; and a second process of pouring a second portion-forming synthetic resin raw material into the second portion forming mold and foam molding a second portion so as to surround at least a portion of the rigid member and to form an integral unit with the first portion.

Molded foam member manufacturing method and shock absorbing member

A molded foam member manufacturing method including: a first process of placing a foam molded first portion () (first molded body) and a rigid member () (rigid plate) in a second portion forming mold () (forming mold); and a second process of pouring a second portion-forming synthetic resin raw material (U) (foamable material) into the second portion forming mold () (forming mold) and foam molding a second portion () (second molded body) so as to surround a portion of the rigid member () (rigid plate) and form an integral unit with the first portion () (first molded body).

Molded foam member manufacturing method, and shock absorbing member

A mounting structure for an energy absorber includes an energy absorber having a mounting hole therein, a member having a mounting surface for receiving the energy absorber thereon and a rod projecting from the mounting surface to enter the mounting hole, and a cylindrical member. The cylindrical member includes a cylindrical portion to be disposed over and fixed to the rod and having axial ends, a first flanged portion extending outwardly from one axial end of the cylindrical portion and located above a peripheral portion of the mounting hole of the energy absorber, and a second flanged portion extending outwardly from the other end of the cylindrical portion and located in and surrounded by the energy absorber. The energy absorber is securely fixed to the member by the cylindrical member.

Mounting structure for energy absorber

A mounting structure for an energy absorber with a mounting hole includes a member, to which the energy absorber is mounted. The member has a rod projecting from a mounting surface thereof. A cylindrical member is fitted onto and engages the rod. The cylindrical member includes a cylindrical portion, and a flanged portion overhanging from the cylindrical portion. The cylindrical portion is inserted into the mounting hole of the energy absorber, and the flanged portion is overlapped with a peripheral portion about the mounting hole.

A mold for expanded moldings capable of efficiently forming small-sized products in high-yield includes a vessel-shaped lower mold and an upper mold covering the lower mold. A partition wall is disposed protrusively from the bottom surface of the upper mold, and the partition wall divides the inside of the mold into a plurality of small cavities. A clearance of approximately 1 to 10 mm is defined between the partition wall and the base of the lower mold.

Mold for expanding moldings

A lightweight shock absorber has an ideal F-S waveform, and is formed of a foam resin material. The cross-sectional area of the absorber in the compression axis direction and the vertical direction changes at least partially in the compression axis direction, and consequently the relation between distortion and compressive stress in the compression axis direction (F-S waveform) is approximately linear.

Shock absorber

A molded article of rigid polyurethane foam is manufactured by using a mold of separable upper and lower mold sections mated to define a cavity therebetween. A film of polypropylene which is previously vacuum formed in conformity to the mold cavity is closely set within the cavity and secured to the lower mold section outside the cavity. A rigid polyurethane foam-forming raw material is introduced into the cavity and on the film and caused to foam and expand in place to mold an article of rigid polyurethane foam. Thereafter, the molded article is lifted together with the film from the mold cavity by a pneumatic pressure or ejector pin. The molded article is stripped from the film to remove only the molded article from the mold without taking the entire film out of the mold. The once lifted film is returned to the original shape by vacuum suction for replacing the film in the cavity.

Method for making and then removing a molded article of rigid

Disclosed herein is a method of manufacturing a rigid polyurethane foam molding for energy absorption, including the steps of introducing a rigid polyurethane foam raw material composed primarily of a polyhydroxy compound and a polyisocyanate compound into a cavity in a mold, and blowing and reacting the rigid polyurethane foam raw material in the cavity, wherein a pack ratio of a core portion of the molding ranges from 0.5 to less than 1.2. Accordingly, the rigid polyurethane foam molding can obtain a plateau value comparable to that of a rigid polyurethane foam slab stock foam suitable for an energy absorbent pad.

Growing community of inventors

Tokyo, Japan

Yoichi Nabeshima