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    POROUS PARTICLES AND PURGING AGENT
    1.
    发明公开
    POROUS PARTICLES AND PURGING AGENT 审中-公开

    公开(公告)号：EP4289884A1

    公开(公告)日：2023-12-13

    申请号：EP22749708.8

    申请日：2022-02-01

    申请人： Kuraray Co., Ltd.

    发明人： SUZUKI Makoto ,  OSHITA Mizuko

    IPC分类号： C08J3/12 ,  B29C33/72 ,  B29C48/27 ,  C08J9/28

    摘要： A purging agent which enables efficiently discharging a resin to be purged in a molding apparatus is provided. Porous particles contain: an ethylene-vinyl alcohol copolymer (A); and an alkali metal (B), wherein a median pore diameter is 0.01 to 3 µm, an average particle diameter is 2.5 to 8 mm, and a content of the alkali metal (B) is 1,000 to 100,000 ppm.

    TIRE VULCANIZATION MOLD AND MANUFACTURING METHOD FOR TIRE
    4.
    发明公开
    TIRE VULCANIZATION MOLD AND MANUFACTURING METHOD FOR TIRE 审中-公开

    公开(公告)号：EP3995303A1

    公开(公告)日：2022-05-11

    申请号：EP20834539.7

    申请日：2020-07-01

    申请人： The Yokohama Rubber Co., Ltd.

    发明人： KITAHARA, Tsubasa ,  MATSUMOTO, Yoshiaki ,  NAGASHIMA, Mika ,  TSUJI, Mitsuo ,  IZUMI, Yoshinori ,  KUSHIDA, Rinko ,  MIYOSHI, Koichiro

    IPC分类号： B29L30/00 ,  B29C33/02 ,  B29C33/72 ,  B29C35/02

    摘要： A tire vulcanization mold and a method of manufacturing a tire using the mold that can ensure good tire performance while avoiding a problem of rubber chip formation in the tire over a long period of time are provided.
    A tire vulcanization mold (1) in which a surface roughness (Ra) in the groove molding portion (4) of the tread molding surface (3) is made smaller than a surface roughness (Ra) in the land portion molding portion (5), in which a surface roughness (Ra) in the groove molding portion (4) is minimized to 0.12 µm or less in a range including at least a main groove molding portion (4a), and in which a surface roughness (Ra) in the land portion molding portion (5) is made to be 3.2 µm or more, is used to manufacture a green tire (TG), and when cleaning the tread molding surface (3), the tread molding surface (3) is irradiated with a laser beam (L) to remove contaminant (X) adhered to the tread molding surface (3).

    PORE-FREE TIRE SEGMENTED MOLD PATTERN BLOCK, SEGMENTED MOLD, AND CLEANING METHODS THEREFOR
    7.
    发明授权
    PORE-FREE TIRE SEGMENTED MOLD PATTERN BLOCK, SEGMENTED MOLD, AND CLEANING METHODS THEREFOR 有权

    公开(公告)号：EP2829376B1

    公开(公告)日：2018-11-28

    申请号：EP12871655.2

    申请日：2012-03-21

    申请人： Himile Mechanical Science and Technology (Shandong) Co., Ltd.

    发明人： ZHANG, Wei ,  ZHANG, Ren

    IPC分类号： B29D30/06 ,  B29C33/10 ,  B29C33/72

    CPC分类号： B29D30/0606 ,  B29C33/10 ,  B29C33/72 ,  B29D30/0662 ,  B29D2030/0607 ,  B29D2030/0609 ,  B29D2030/0617 ,  B29D2030/0663

    摘要： A pore-free tire segmented mold pattern block (100) and a segmented mold are provided. The pore-free tire segmented mold pattern block (100) is used for forming a tire segmented mold. The pattern block (100) comprises pattern pieces (1) that are stacked one on top the other. The pattern block (100) has an exhaust channel (20) communicated with an inner circumference surface (11) of each pattern piece (1) and an end surface (12) of the pattern block. The exhaust channel (20) comprises axial exhaust holes (27) that are axially disposed on the pattern block (100), communicate each pattern piece (1), and are communicated with the end surface (12) of the pattern block. Also disclosed is a cleaning method for the pore-free tire segmented mold pattern block (100) and the segmented mold. When the mold is cleaned, the exhaust channel (20) is used as a cleaning channel, and the axial exhaust holes (27) of the exhaust channel are used as an entrance for a cleaning medium. Through the foregoing structure, an approximately closed container is formed by an inner cavity (200) of the mold. An organic solution is injected into the inner cavity (200) of the mold through a cleaning hole. Under the effect of certain pressure, the organic solution is discharged through an exhaust gap (11). A discharging process is a process of cleaning the exhaust gap (11). By using the cleaning method, a glue scale is removed more thoroughly and effectively, an operation is easy, and the cleaning cost is low.