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1.发明授权Nozzle for the mixing of at least two flowable reaction components and process for operating such nozzle 失效用于混合至少两种可流动反应组分的喷嘴和用于操作这种喷嘴的工艺
公开(公告)号：US4917502A
公开(公告)日：1990-04-17
申请号：US162772
申请日：1988-03-01
CPC分类号： B29C45/1607 , B29B7/7457 , B29C44/425 , B29C45/1603
摘要： The invention relates to a nozzle for mixing at least two flowable (and in particular foam-forming) reaction components comprising a housing; component supply pipes leading into the housing; a housing bore arranged in the housing having a coaxial outlet channel in its end face; at least one needle casing arranged coaxially in the housing bore; an injection needle guided coaxially in the needle casing; a first chamber arranged between the wall of the housing bore and the needle casing with one of the component supply pipes opening into said first chamber; a second chamber arranged between the needle casing and the injection needle, with another component supply pipe opening into said second chamber; wherein in the closed state, said injection needle forms a tight fit with the internal end face of the needle casing, and the external end face of said needle casing forms a tight fit with the internal end face of the housing bore; and wherein in the open state, said injection needle frees a coaxial nozzle opening of the needle casing and an opening is formed between the external end face of the needle casing and the internal end face of housing bore. The invention also relates to a process for operating this nozzle.
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