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Process for manufacturing moulded articles made of plastics, cellulose or wood pulp and provided with cavities

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Title:
Process for manufacturing moulded articles made of plastics, cellulose or wood pulp and provided with cavities
Author: Ickinger, Georg Michael
Description: The invention concerns a procedure for the production of structured parts with cavities consisting of plastics, cellulose or wood granulate, in particular of light-weight construction compound parts, using molding tools. Gas-creating insertion elements are also used in the procedure. A process forms lightweight molded articles by positioning inserts having gas creating substances at set positions on a matrix layer positioned between mold halves. The matrix layer with inserts is pressed into the mold cavity and sandwiched between molding material. The gas forming substances are activated to produce gas and the mold halves partially opened to allow the gas to form gas cavities at the position of the inserts. The matrix may be a film or net with gas creating substances in attached packets. Alternatively, the matrix may be developed with inserts of gas producing substances encapsulated within molding material by co-extrusion or co-injection nozzles.
Creation Date: 2002
Language: English
Source: USPTO Issued Patents

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