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    • 5. 发明申请
    • Process and apparatus for the production of polyurethane moldings
    • 用于生产聚氨酯模制品的工艺和设备
    • US20050173846A1
    • 2005-08-11
    • US11049849
    • 2005-02-03
    • Jurgen WirthIngo Kleba
    • Jurgen WirthIngo Kleba
    • B29C33/00B29C45/00B29C45/17B29C45/26B29C67/24B29K75/00
    • B29C67/246B29C33/0055B29C45/174B29K2075/00
    • The invention relates to a process for the production of polyurethane moldings by the reaction-injection-molding process, in which at least one isocyanate component and at least one polyol component are delivered in metered manner into a mixing chamber, are mixed in the mixing chamber to form a polyurethane reaction mixture and the polyurethane reaction mixture is then discharged via a runner into the cavity of a mold, characterized in that a pressure is exerted on the polyurethane reaction mixture in the cavity by means of a pressure medium, which pressure is sufficiently high for defects, which arise by reactive and/or thermal shrinkage, and/or entrapped air pockets to be closed, wherein the pressure medium is introduced into at least one overflow cavity hydraulically connected with the cavity, and/or is introduced into the runner.
    • 本发明涉及通过反应注射成型方法生产聚氨酯模制品的方法,其中将至少一种异氰酸酯组分和至少一种多元醇组分以计量方式输送到混合室中,混合在混合室中 以形成聚氨酯反应混合物,然后将聚氨酯反应混合物通过流道排出到模具的空腔中,其特征在于,通过压力介质在空腔中对聚氨酯反应混合物施加压力,该压力足够 高反应性和/或热收缩引起的缺陷和/或被封闭的空气袋,其中压力介质被引入到与空腔液压连接的至少一个溢流腔中和/或被引入流道 。