Nozzle for mixing flowable reaction components

US4749554A · kind A · utility

Assignee

• Maschinenfabrik Hennecke GmbH · DE

Inventors

• Ferdinand Proksa · Leverkusen, DE
• Hans-Michael Sulzbach · Rübhausen, DE
• Reiner Raffel · Siegburg, DE
• Ferdinand Althausen · Neunkirchen, DE

Key dates

• Filing date: Aug 23, 1984
• Grant date: Jun 7, 1988
• Expiry date: Aug 23, 2004

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C45/1603
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

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.