Daikyonishikawa Corporation

Prime Polymer Co., Ltd.

Gp Daikyo Corporation

Daikyo Co., Ltd.

Hiroshima Prefecture

Masaharu Okamura

Takeharu Suga

Toshifumi Sakai

Minoru Sugawara

Yoshiaki Saito

Hirofumi Goda

Nobuyuki Homi

Toshiki Miyachi

Hiroharu Kojima

Norio Nawachi

Hiroshi Ahagon

Akira Yamamoto

In a resin molded article (M), a wear-resistant surface layer () is provided on a surface of a base () made of a thermoplastic resin with an undercoat layer () being interposed therebetween, and the surface layer () has a composition containing silicon, oxygen, carbon, and hydrogen, a thickness of 0.02 &#x3bc;m or greater and 0.48 &#x3bc;m or less, and a density of greater than 1.5 g/cmor a hardness of 1.5 GPa or greater.

Resin molded articles

A process for producing a sound absorber having skin layers constituting front and back surfaces and, interposed between the skin layers, a void layer having a plurality of pin formed holes, each hole having a depth which is enough to penetrate one of the skin layers and is not enough to reach the other skin layer. The sound absorber is formed of a resin material containing 2 to 60 wt % of reinforcing fibers with a length of 2 to 100 mm.

Process for producing sound absorber and produced by the process, sound absorber and sound absorbing structure

A sound absorbing bodyhas a molded bodyincluding two unexpanded layersand an expanded layerhaving a number of voids and held between these unexpanded layers, a plurality of holesA of a depth that passes through the unexpanded layerand does not reach the other unexpanded layerare formed at any positions on the molded body, a cross-sectional area of the holeA is in the range from 0.785 to 314 mm, and the pitch is 1 mm or larger. Laminating a plurality of materials is not required, and both the sound absorbing capability and sound insulating capability can be secured by integral molding, and further, only unpleasant sounds can selectively be absorbed.

Sound absorbing body, sound absorbing structural body, and method of manufacturing these bodies

An impact absorbing mechanism for absorbing an impact load input between receiving portions at a predetermined distance from each other is provided; in the impact absorbing mechanism, a dispersing transferring portion for dispersing and transferring the input impact load in two directions is formed by connecting respective one end sides of two load transferring members, impact absorbing members for absorbing dispersed impact loads in directions along the transferring members and supported by receiving stopping portions are disposed on the other end sides of the respective load transferring members, a connecting portion of the load transferring members is positioned to be closer to load input sides than to the other end sides of the respective load transferring members, and the input impact load is dispersed and absorbed in two directions; thereby, it is possible to obtain an impact absorbing mechanism by which impact energy absorbing performance in a displacement initial stage is enhanced to carry out efficient impact absorption and it is possible to relatively easily cope with changes in required impact absorbing properties.

Impact absorbing mechanism and bumper reinforcement having the mechanism

A method for joining thermoplastic resin molded products by pressing together joining surfaces of two molded products with electric resistance wire therebetween is provided, wherein the method comprising: a first step in which electric resistance wire is sandwiched between the joining surfaces of two molded products which are to be joined, pressure is applied at a first predetermined pressure, and current of a predetermined value is applied for a predetermined time to the electric resistance wire, so that the resin around the electric resistance wire is melted by the thermal energy produced in the electric resistance wire while the surfaces of the two molded products that are to be joined are held at a predetermined interval; and a second step in which, following the conclusion of the first step, the current being applied to the electric resistance wire is stopped, and a second predetermined pressure is applied to attach the molten resin under pressure.

Method for joining thermoplastic resin molded products

A bumper reinforcement has a generally reversely positioned U-shaped cross section, which is adapted to be combined with a bumper face having a generally U-shaped cross section to constitute a bumper. The bumper reinforcement is removably assembled to within an opening of the bumper face with an opening side of the bumper reinforcement directed toward the bumper face. Also, the bumper reinforcement has a plurality of vertical reinforcing ribs that extend vertically to link upper face portion and lower face portion of the bumper reinforcement with each other, and for segments partitioned by the vertical reinforcing ribs, diagonal reinforcing ribs extend diagonally in the segments and stretched diagonally across vertical reinforcing ribs on both sides of each segment, linking them with each other. The vertical reinforcing ribs and the diagonal reinforcing ribs are integrally molded in the bumper reinforcement.

Growing community of inventors

Hiroshima, Japan

Masaharu Okamura