Method and apparatus for producing a foam from a molten thermopl

Details Method and apparatus for producing a foam from a molten thermopl Method and apparatus for producing a foam from a molten thermopl

1987-08-05

1988-12-13

Kight, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521 56, 521 60, 521 78, 521 79, 521119, 521133, 252307, 264 41, 264 50, 264 53, 264 54, C08G 8500

Patent

active

047911425

ABSTRACT:
A method and apparatus for creating molten thermoplastic material foam by separately pressurizing the molten thermoplastic material and a gas and by delivering that material and gas sequentially to a premixing chamber, through a sintered metal insert and a post mixing chamber, to a discharge orifice of a spray nozzle. The apparatus for practicing this method comprises a nozzle assembly, including a nozzle adaptor and a nozzle, the adaptor of which has flow passages for delivering the pressurized gas and molten material to a premixing cavity and subsequently to and through a sintered metal insert contained within the nozzle.

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