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    PROCESS AND DEVICE FOR PRODUCING MOLDED FOAM
    10.
    发明公开
    PROCESS AND DEVICE FOR PRODUCING MOLDED FOAM 审中-公开

    公开(公告)号：EP4108406A1

    公开(公告)日：2022-12-28

    申请号：EP22189315.9

    申请日：2016-07-08

    申请人： Maxell, Ltd.

    发明人： YUSA, Atsushi ,  YAMAMOTO, Satoshi ,  GOTO, Hideto

    IPC分类号： B29C44/34 ,  B29B7/42 ,  B29B7/72 ,  B29B7/74 ,  B29B7/82 ,  B29C48/395 ,  B29C48/53 ,  B29C44/42 ,  B29K105/04 ,  B29C44/60

    摘要： A process for producing molded foam is provided with which a complicated control device for a physical blowing agent can be omitted or simplified and the amount in which the physical blowing agent is dissolved in a molten resin can be stabilized by a simple mechanism. In the process for producing molded foam, use is made of a plastication cylinder (410) that has a plastication zone in which a thermoplastic resin is plasticated and melted into a molten resin and a starvation zone (43A or 43B) which comes into the state of being starved of the molten resin and that has an inlet for introducing the physical blowing agent into the starvation zone. The production process comprises: plasticating and melting the thermoplastic resin in the plastication zone to give the molten resin; bringing the starvation zone into the state of being starved of the molten resin; introducing a pressurized fluid containing the physical blowing agent and having a certain pressure into the starvation zone to keep the starvation zone at the certain pressure; bringing the starved-state molten resin and the pressurized fluid containing the physical blowing agent and having the certain pressure into contact with each other in the starvation zone, while keeping the starvation zone at the certain pressure; and molding the molten resin which was contacted with the pressurized fluid containing the physical blowing agent, thereby producing molded foam.