Polymer foam plank with densified skin, method and apparatus...

Details Polymer foam plank with densified skin, method and apparatus... Polymer foam plank with densified skin, method and apparatus...

B - Operations, Transporting

32

B

B32B 27/06 (2006.01) B29C 44/22 (2006.01) B29C 44/34 (2006.01) B32B 3/00 (2006.01) B32B 3/26 (2006.01) B32B 5/18 (2006.01)

Patent

CA 2369065

A method and apparatus for making a densified skin polymer foam plank (12 and 22) comprising providing a polymer foam having a plurality of cells and heating an outer surface of the foam at a heating station (46 and 48). The heating step collapses and melts the cells adjacent the outer surface to form the densified skin (14, 24, 26, 54 and 56) having a density greater than a density of the foam before the heating step. Additionally, the method and apparatus may further include extruding the polymer foam from an extruder.

L'invention concerne un procédé et un dispositif destinés à la fabrication d'une plaque de mousse polymère à peau densifiée (12, 22), consistant à prendre une mousse polymère comprenant plusieurs alvéoles et à chauffer la surface extérieure de la mousse au niveau d'un poste de chauffage (46, 48). L'étape de chauffage provoque l'affaissement et la fusion des alvéoles adjacentes à la surface extérieure et la formation d'une peau densifiée (14, 24, 26, 54, 56) possédant une densité supérieure à celle de la mousse avant le chauffage. Le procédé et le dispositif de l'invention peuvent également comporter l'extrusion de la mousse polymère à partir d'une extrudeuse.

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