Process for the production of structural thermoinsulating elements
AssigneeEnichem S.p.A.
InventorsGiampiero Pirotta, Romano Reggiani
Life of this patent
Estimating the term…
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.
Claims1
Process for the production of thermoinsulating structural elements and fluid circulation pipes thereon, consisting of:
- a) producing a thermoplastic material by thermoforming;
- b) pulling said material onto a male half shell of a mold for the production of a structural element;
- c) closing the mold by inserting said half shell in the corresponding negative half shell of said mold in order to form an intermediate cavity between said half shells;
- d) inserting a plurality of hollow bored elements with the same external dimensions and geometry as pipes to be produced in the intermediate cavity;
- e) filling said intermediate cavity with foamed or semifoamed pearls or granules of a thermoplastic polymer;
- f) sintering the pearls by feeding saturated steam or hot air through said hollow elements, and maintaining walls of the thermoplastic material at a temperature of at least 10.degree. C. below the glass transition temperature of the thermoplastic material;
- g) cooling the sintered pearls and extracting said hollow bored elements from the mold;
- and
- h) removing from the mold the thermoinsulating structural element with produced pipes.
Dependencies are inferred from the claim text.