US 2010/0244299 A1 · Method For Producing Continuous Expanded Polystyrene Foam Parts

Abstract

The invention relates to a novel, innovative industrial method for producing polystyrene (EPS) foam parts of arbitrary length and having a constant cross-section, with mixed densities located in accordance with the mechanical and thermal properties required for each application. The invention also relates to a machine (apparatus) for producing said solid parts having localized densities defined by the mechanical and thermal requirements of the application. The aforementioned products are produced by joined both longitudinally and transversely. The invention can be used to reduce the standard method to three steps, thereby resulting in a significant saving in terms of production. Moreover, unlike with the standard method, variants can be produced using the above-mentioned method, thereby increasing the range of application said type of products.

Claims3

Dependent claims

Method for producing continuous expanded polystyrene foam parts (EPS) that comprising a mix of density on length, cross or arbitrary direction which are in the following steps:

pre-expansion pearl of polystyrene expanded to one or several expanded densities (from 7.5 to 60 kg/m3), intermediate rest independent for each material, to each density, in containers with meshes that let the air enter inside (from 3 to 10 hours depending on the density of atmosphere conditions), simultaneously feeding for each density with independent injectors in the wished region inside the pre-firing camera in a higher pressure that the atmospheric one, which has one or several divisors that maintain separated the regions according its density during a partial firing, using saturated steam water with a pressure of 20 kPa during 15 seconds, the pre-fired element is introduced with a final fire camera, once extracted the divisor and it is tied by a clamp during the final firing using saturated steam, said water with a pressure of 100 kPa during 15 seconds and simultaneously the firing of segment that is in the final fire camera repeats in the pre-firing camera the described method in the pre-firing stage, in such a way that are joining consecutive segments to form a continuous piece.

Dependencies are inferred from the claim text.

Method For Producing Continuous Expanded Polystyrene Foam Parts

Life of this patent

Method For Producing Continuous Expanded Polystyrene Foam Parts

Life of this patent

Abstract

Claims3