Method and apparatus for hollow core extrusion of high...

Details Method and apparatus for hollow core extrusion of high... Method and apparatus for hollow core extrusion of high...

B - Operations, Transporting

29

C

18/661

B29C 47/00 (2006.01) B29B 7/74 (2006.01) B29C 44/22 (2006.01) B29C 67/20 (2006.01) C08J 9/04 (2006.01)

Patent

CA 2027267

A method and apparatus for dispensing a foamable, pressurized solution of a gas and a high viscosity polymeric material in a manner which produces a foamed bead having a hollow core. Initial foaming occurs in a nozzle through which the solution is dispensed to atmosphere; at a core of the bead. Subsequent foaming of of the bead exteriorly of the core occurs outside the nozzle, and results in an extruded, foamed bead of high viscosity polymeric material having a tubular shape and particularly suitable for form-in-place gasket applications.

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