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    COMPOSITE OF METAL AND POLYMER ALLOY COMPOUND AND ITS MANUFACTURE
    11.
    发明专利
    COMPOSITE OF METAL AND POLYMER ALLOY COMPOUND AND ITS MANUFACTURE 失效

    公开(公告)号：JPH01222949A

    公开(公告)日：1989-09-06

    申请号：JP4926488

    申请日：1988-03-02

    Applicant: BRIDGESTONE CORP

    Inventor： IWASAKI SHINICHI ,  SHINOGAYA TOSHIKAZU ,  ISHIDA YOZO

    IPC: B32B15/085 ,  B32B15/08

    Abstract: PURPOSE:To be rendered applicable to any complicated shape, by forming a composite of a metallic base material and a polymer alloy compound obtained by mixing and kneading polyethylene of super high molecular weight and rubber, and integrated at least on the surface of said metallic base material. CONSTITUTION:A metallic base material 1 is formed of iron and such material that is obtained by surface treatment of iron with zinc, tin, chromium etc., or aluminum and such material that is obtained by surface treatment of aluminum with aluminum alloy, brass, stainless and titan etc. For an adhesive agent, resol-type phenol surface coating adhesive agent, unsaturated chlorinated rubber finish coating adhesive agent, chlorosulfonated polyethylene finish coating adhesive agent or the like, namely, a suitable rubber halide adhesive agent may be selected. A polymer alloy compound 2 is obtained by mixing and kneading polyethylene of super high molecular weight and rubber in the presence of a radical starting agent and a crosslinking agent. The polyethylene of super high molecular weight employed here has not less than 500,000mol.wt., preferably, about 800,000-5,000,000mol.wt.

    METHOD FOR REDUCING FRICTION COEFFICIENT OF RUBBER
    12.
    发明专利
    METHOD FOR REDUCING FRICTION COEFFICIENT OF RUBBER 失效

    公开(公告)号：JPH01217049A

    公开(公告)日：1989-08-30

    申请号：JP4306288

    申请日：1988-02-25

    Applicant: BRIDGESTONE CORP

    Inventor： IWASAKI SHINICHI ,  ISHIDA YOZO ,  SHINOGAYA TOSHIKAZU

    IPC: C08J5/16 ,  C08L21/00

    Abstract: PURPOSE:To obtain a rubber, capable of remarkably reducing friction coefficient, sustaining effects thereof a long period and excellent in durability, by kneading rubber with specific ultrahigh-molecular weight polyethylene and converting the rubber into a polymer alloy. CONSTITUTION:Rubber is kneaded with ultrahigh-molecular weight polyethylene having >=500000, preferably 800000-5000000 molecular weight and converted into a polymer alloy. Both the components are kneaded in the presence of a radical initiator and a crosslinking agent. The content of the ultrahigh- molecular weight polyethylene in the rubber is >=5wt.%, preferably >=10wt.%.

    MANUFACTURE OF COMPOSITE NUT
    15.
    发明专利
    MANUFACTURE OF COMPOSITE NUT 失效

    公开(公告)号：JPS61206610A

    公开(公告)日：1986-09-12

    申请号：JP4776085

    申请日：1985-03-11

    Applicant: BRIDGESTONE CORP

    Inventor： SAKAYORI KIYOSHI ,  IWASAKI SHINICHI ,  ISHIDA YOZO

    IPC: F16B37/14 ,  B29C39/10 ,  B29C39/26 ,  B29K105/20 ,  B29L1/00

    Abstract: PURPOSE:To obtain a composite nut covered with synthetic resin by employing a normal nut by a method wherein synthetic resin is filled in a bag-shaped part compartment formed between a mold and a core, the tip of which is protruded from the back face of a nut base body and from the tip of which a sealing ring is fitted so as to abut against the nut base body. CONSTITUTION:A nut base body 2 is threadingly attached to a core 3 so that the tip of the core protruded from the back face 4 of the nut base body 2. In addition, a sealing ring 5 is fitted from the tip of the core 3 in order to seal the screwed-in portion between the core 3 and the nut base body 2. After the resultant core and nut base body assembly is installed in a mold 1, synthetic resin, which is molten by heating, is filled through a small hole 6 bored on the mold 1 into a cavity, resulting in realizing a structure consisting in imbedding the sealing ring 5 at the junction part between the nut base body 2 and a bag-shaped part 10. Consequently, a composite nut is easily obtained only by employing a sealing ring. The imbedding of the sealing ring in the composite nut also prevents the rusting of a bolt from occurring.

    MANUFACTURE OF RESIN COATED NUT
    18.
    发明专利
    MANUFACTURE OF RESIN COATED NUT 失效

    公开(公告)号：JPS63254011A

    公开(公告)日：1988-10-20

    申请号：JP9049687

    申请日：1987-04-13

    Applicant: BRIDGESTONE CORP

    Inventor： MOROOKA TAKUYA ,  SAKAYORI KIYOSHI ,  IWASAKI SHINICHI ,  ISHIDA YOZO ,  ISHIZUKA YUZO ,  SHINOGAYA TOSHIKAZU

    IPC: F16B37/14 ,  B29C39/10 ,  B29C39/26 ,  B29K105/22 ,  B29L1/00

    Abstract: PURPOSE:To improve a not tightening strength and simplify the positioning man-hours of the base body of a nut, by a method wherein the base body of the nut is arranged at a predetermined position in a cavity and the whole surface of the same is coated with a resin in a predetermined thickness. CONSTITUTION:The base body 6 of a nut is screwed into a male screw 4, projected from a mold 1 having a height higher than the same of the base body 6. The molds 1, 2 are mated to form a cavity 3 and the base body 6 is arranged at a predetermined position in the cavity 3 by the pedestal 5, surrounding the base of the male screw 4. Polyamide resin is poured into and cured in the cavity 3 under this condition. When a resin coated nut A is screwed off the male screw 4, the surface of the base body 6 is coated by the resin 7 while the outer periphery of the base body 6 is provided with a hexagonal shape to engage for turning. A round recess 8 remains in a front resin 7', formed on the base body 6, while a female screw 9 is formed on a rear surface resin 7''. The female screw 9 is formed so as to have a diameter, slightly smaller than the female screw 10 of the base body due to contraction, whereby the female screw 9 bites the male screw thread of a bolt to be screwed thereto and an effect to prevent the nut from loosening can be obtained.

    MANUFACTURE OF COMPOSITE MOLDED FORM CONSTITUTED OF THERMOPLASTIC RESIN AND REINFORCING FIBER
    19.
    发明专利
    MANUFACTURE OF COMPOSITE MOLDED FORM CONSTITUTED OF THERMOPLASTIC RESIN AND REINFORCING FIBER 失效

    公开(公告)号：JPS62244622A

    公开(公告)日：1987-10-26

    申请号：JP8812586

    申请日：1986-04-18

    Applicant: BRIDGESTONE CORP

    Inventor： SHINOGAYA TOSHIKAZU ,  ISHIDA YOZO

    IPC: B29C70/06 ,  B29C70/16 ,  B29D23/00 ,  B29K105/12 ,  C08J5/04

    Abstract: PURPOSE:To provide the manufacturing method of a fiber reinforced plastic molded form excellent in productivity by a method wherein reinforcing fibers, impregnated with thermo plastic resin, are wound around a mandrel to form a preliminary molded form, then, the preliminary molded form is heated to a temperature higher than the softening temperature of the thermoplastic resin and is cooled while being pressurized in a mold. CONSTITUTION:A preliminary molded form is formed by a method wherein fibers, impregnated with thermoplastic resin, are wound or braided on a mandrel (core metal or core material). A wound part or a braided part is heated locally to soften the fibers and facilitate the winding of the fibers whereby the raveling of the wound fibers is prevented. A balsa wood, synthetic resin expanded form or the like is used as the material of a core material. The obtained preliminary molded form is heated to a temperature higher than the softening temperature of the thermoplastic resin. The softening temperature is different depending on the kind of the resin and it is 250 deg.C in the case of polyamide while it is 220 deg.C or higher in the case of polybutylene terephthalate, for example. The heated preliminary molded form is cooled while being pressurized in a mold. The temperature of the mold is kept lower than the softening temperature. According to this method, a composite form, excellent in dimensional accuracy and high in strength, may be manufactured with good productivity while the compos ite form may be used for a use in which a resistance to corrosion, insulating property, heat insulating property and lightening property are requested.

    PREPARATION OF POLYIMIDE RESIN MOLDED BODY
    20.
    发明专利
    PREPARATION OF POLYIMIDE RESIN MOLDED BODY 失效

    公开(公告)号：JPS62234908A

    公开(公告)日：1987-10-15

    申请号：JP7828186

    申请日：1986-04-07

    Applicant: BRIDGESTONE CORP

    Inventor： SHINOGAYA TOSHIKAZU ,  ISHIDA YOZO

    IPC: B29C43/02 ,  B29C43/52 ,  B29C67/04 ,  B29K79/00

    Abstract: PURPOSE:To suppress the deterioration or coloration of a polyimide resin and to improve workability, by filling a mold with the polyimide resin to compress said resin under specific pressure and heating the same to specific temp. during a compression process or after the finish of commpression and demolding the obtained molded body at specific temp. CONSTITUTION:A polyimide resin is a copolymer obtained from aromatic tetracarboxylic acid anhydride or an esterified substance thereof and aromatic diamine. In a first process, a mold is filled with the polyimide resin and, in a second process, the resin is compressed under pressure of 500-5,000kg/cm . In a third process, the resin in th mold is heated to curing temp. which is a 300-600 deg.C range from the glass transition point of the resin to the decomposition temp. thereof and, in a forth process, the molded product is taken out of the mold at temp. being the glass transition point of the resin +100 deg.C or less. The high density molded product free from deterioration or coloration is obtained only by hot press and is excellent in machinability, heat resistance, slidability and dimensional stability.

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