Process for the production of structural thermoinsulating elemen

Details Process for the production of structural thermoinsulating elemen Process for the production of structural thermoinsulating elemen

1995-11-29

1997-11-25

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264127, 249142, B29C 4406, B29C 4412

Patent

active

056908717

ABSTRACT:
Process for the production of thermoinsulating structural elements, which includes:
a)producing by thermoforming a cell made of thermoplastic material;
b)pulling on such cell on a male die half shell;
c)closing the die with a negative half shell suitable to form a cavity between the half shells,
d)inserting in the cavity bored hollow elements
e)filling the cavity with foamed pearls in thermoplastic polymers;
f)sintering the pearls with steam fed through hollow elements.
g)cooling and extracting the hollow elements
h)extracting the structural element from the die.

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patent: 4284447 (1981-08-01), Dickens et al.
patent: 4439122 (1984-03-01), Besse et al.
patent: 4693856 (1987-09-01), Rubens et al.
patent: 4900487 (1990-02-01), Lalloz et al.
patent: 4948541 (1990-08-01), Beck
patent: 5476618 (1995-12-01), Ito et al.

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