Process and device for cooling extruded hollow sections
    4.
    发明授权
    Process and device for cooling extruded hollow sections 失效
    用于冷却挤压中空部件的工艺和装置

    公开(公告)号:US06418732B1

    公开(公告)日:2002-07-16

    申请号:US09019196

    申请日:1998-02-05

    CPC classification number: B29C47/882 B29C47/0023 B29C47/003

    Abstract: A process and device is provided for cooling extruded hollow sections, especially pipes, that are made of plastic. Liquid or supercritical carbon dioxide is directed into the interior of the plastic hollow section through an extruder head and is depressurized in at least one depressurization nozzle, whereby carbon dioxide in gaseous and solid form is produced. The carbon dioxide that is in gaseous form is directed to the inner wall of the hollow section, while carbon dioxide snow is brought into heat exchange with the inner wall of hollow section only to the extent that the latter is not damaged.

    Abstract translation: 提供了一种用于冷却由塑料制成的挤压中空部分,特别是管道的方法和装置。 液体或超临界二氧化碳通过挤出机头引导到塑料中空部分的内部,并在至少一个减压喷嘴中减压,从而产生气态和固体形式的二氧化碳。 处于气态的二氧化碳被引导到中空部分的内壁,而二氧化碳雪与中空部分的内壁进行热交换,只有后者不被损坏的程度。

    INTERNAL GAS PRESSURE METHOD FOR PRODUCING PLASTIC PARTS
    5.
    发明申请
    INTERNAL GAS PRESSURE METHOD FOR PRODUCING PLASTIC PARTS 审中-公开
    用于生产塑料零件的内部气体压力方法

    公开(公告)号:US20120319334A1

    公开(公告)日:2012-12-20

    申请号:US13328295

    申请日:2011-12-16

    CPC classification number: B29C45/1706 B29C2045/1707 B29C2045/1709

    Abstract: A method for producing a molded part, wherein a molten polymer is introduced into a mold space of a molding tool and liquid carbon dioxide with a pressure of at least 160 bar, preferably with a pressure of at least 200 bar or at least 250 bar is supplied to the mold space, whereby the polymer is pressed against the walls of the mold space and a space is formed in the polymer.

    Abstract translation: 一种用于制造模制部件的方法,其中将熔融聚合物引入模制工具的模具空间中并且压力为至少160巴,优选至少200巴或至少250巴的压力的液体二氧化碳是 供应到模具空间,由此聚合物​​被压靠在模具空间的壁上并且在聚合物中形成空间。

Patent Agency Ranking