Title:
HIGH PRESSURE MIXING HEAD
Document Type and Number:
Japanese Patent JPS52125576
Kind Code:
A
Abstract:
The specification describes a high pressure mixing head for producing a chemically reactive mixture for producing foam articles. An expulsion piston adapted to move in a mixing chamber with inlet ports for the reactive mixture components and with an outlet port is driven by a drive piston. In order to achieve a higher velocity of the expulsion piston in the vicinity of the inlet ports the drive piston is constructed in two parts, an inner piston part and an outer annular piston part adapted to slide on the inner piston part. At the end of the stroke the outer piston part is arrested and the inner piston part continues to move at a higher velocity, a projection at the end of the drive piston moving into a recess. At the beginning of the stroke in the other direction the projection is moved out of the recess by a pressure medium at a high speed until the projection has cleared the recess.
Inventors:
ARUFURETSUDO SHIYURIIKUMAN
Application Number:
JP1935977A
Publication Date:
October 21, 1977
Filing Date:
February 25, 1977
Export Citation:
Assignee:
UPJOHN CO
International Classes:
B01F23/47; B29B7/32; B29B7/58; B29B7/00; B29B7/66; B29B7/76; B29B7/94; B29B9/00; B29C39/00; B29C39/24; B29K105/04; (IPC1-7): B01F5/00; B29B1/06; B29D27/02
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