Controlled Skin Formation for Foamed Extrudate
Patent application, filed 26 Oct 2006
NAVAL UNDERSEA WARFARE CENTER DIV NEWPORT RI
Pagination or Media Count:
The present invention is directed to the extrusion of plastics, and more specifically to a method for achieving a very smooth extrudate surface using thermoplastic syntactic foam materials. It is a general purpose and object of the present invention to disclose a method and apparatus to control the skin formation of a foamed extrudate. It is a further object to employ an insulating plate to shield and control cooling of the die used to extrude the foam such that a low density extrudate with a solid skin and inner foamed core is achieved.
- Machinery and Tools