Method of forming an article consisting of a foam core and one o

Details Method of forming an article consisting of a foam core and one o Method of forming an article consisting of a foam core and one o

1991-06-26

1994-12-20

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 403, 264 451, 264 464, 264 53, 264 54, 264257, 264510, 264570, B29C 6722, B29C 4310

Patent

active

053743830

ABSTRACT:
A method of forming in a mould an article using a thermoplastic sandwich material, which material has a core of a thermoplastic foam and one or two, optionally fiber-reinforced, covering layers of a thermoplastic resin, the method having the steps of providing in the mould a foamable thermoplastic synthetic material and said one or two fiber-reinforced covering layers, supplying a liquid to the mould at an elevated pressure and temperature, whereby the temperature of the thermoplastic synthetic material is raised to a temperature above the temperature at which the material foams, followed by lowering the pressure of the liquid and removing the liquid from the mould with foaming of the thermoplastic synthetic material.

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patent: 5093053 (1992-03-01), Eckardt et al.

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