Patent ID: 7955547
Filing Date: 2011-06-07
Classification: B29C,Y10S

Abstract:
1. A method for forming articles from foaming polymers and compositions based thereon, utilizing a formation chamber from a microwave transparent material, to which formation chamber a mixture of a pre-foamed or granulated foaming polymer or a composition based thereon and water is fed, and which formation chamber is arranged in a microwave radiation providing channel, and a unit for increasing and equalizing pressure in the formation chamber, the articles being formed by thermal energy produced by water exposed to microwave radiation at a temperature up to 170 degrees Centigrade which is achieved, regulated and limited by regulating steam pressure in the formation chamber by means of the unit for increasing and equalizing pressure, characterized in that said unit for increasing and equalizing pressure comprises an air compressor, an air receiver connected to said air holes of the formation chamber, and a regulating valve and an emergency valve, wherein said compressor increases pressure in said air receiver during foaming, and said regulating valve maintains pressure in said air receiver and said formation chamber at a predetermined level or in a predetermined numerical field of levels, thus setting an air or steam rate of output from said air receiver.