Gas sealing valve and valve equipped plastic processing...

Details Gas sealing valve and valve equipped plastic processing... Gas sealing valve and valve equipped plastic processing...

B - Operations, Transporting

29

C

18/680

B29C 45/00 (2006.01) B29C 45/17 (2006.01) B29C 45/28 (2006.01)

Patent

CA 2013320

The valve needle of a gas sealing valve for plastic processing plants may be controlled by a control valve, which in turn is controlled by a working gas volume in order to prevent formation of internal waviness in injection molded articles even under very high gas pressures and to assure high. flexibility in production without refitting delays. During plastic mass injection the valve needle seals tightly. During gas return the valve needle remains open until the gas bubble in the mold cavity is completely emptied.

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