Production of extruded foam
First Claim
1. A method of producing a laminated body of structural thermoplastic foam, the method comprising the step of successively extruding a plurality of foam layers from an extrusion die, each next layer being extruded onto a previously extruded layer, to form a stack of mutually bonded layers, the same extrusion die forming a plurality of individually extruded layers of the stack, wherein after each layer has been extruded, the layer is cut into at least two layer portions to form at least two independent blocks, each block comprising a respective stack of a plurality of mutually bonded layers.
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Accused Products
Abstract
A method of producing a laminated body of structural thermoplastic foam, the method comprising the step of successively extruding a plurality of foam layers from an extrusion die, each next layer being extruded onto a previously extruded layer, to form a stack of mutually bonded layers.
12 Citations
25 Claims
- 1. A method of producing a laminated body of structural thermoplastic foam, the method comprising the step of successively extruding a plurality of foam layers from an extrusion die, each next layer being extruded onto a previously extruded layer, to form a stack of mutually bonded layers, the same extrusion die forming a plurality of individually extruded layers of the stack, wherein after each layer has been extruded, the layer is cut into at least two layer portions to form at least two independent blocks, each block comprising a respective stack of a plurality of mutually bonded layers.
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25. A method of producing a laminated body of structural thermoplastic foam, the method comprising the step of successively extruding a plurality of foam layers from an extrusion die, each next layer being extruded onto a previously extruded layer, to form a stack of mutually bonded layers, the same extrusion die forming a plurality of individually extruded layers of the stack, wherein after each layer has been extruded, the layer is cut into at least two layer portions to form at least two independent blocks, each block comprising a respective stack of a plurality of mutually bonded layers, and wherein the stack is translationally moved by a conveyor system in a single direction under the extrusion die during extrusion of each foam layer.
Specification