PRODUCTION OF MULTILAYERED FOAMED MOLDED ARTICLE

PROBLEM TO BE SOLVED: To provide a method for producing conveniently a multilayered foamed molded article which can be used for automotive interior trim, etc., and is lightweight and highly rigid and excellent in appearance. SOLUTION: At first, a skin material 3 is arranged between top and bottom mo...

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Bibliographische Detailangaben
Hauptverfasser:	HIKITA KENJI, AOKI OSAMU, MASUBUCHI NAGANORI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for producing conveniently a multilayered foamed molded article which can be used for automotive interior trim, etc., and is lightweight and highly rigid and excellent in appearance. SOLUTION: At first, a skin material 3 is arranged between top and bottom molds 1 and 2 by using the top and bottom molds for mold stamping molding and then, while a resin compsn. (a molten resin 6) for forming a base contg. a polypropylene resin material and a foaming agent is injected and filled into a cavity formed by the top and bottom molds under a condition where the molds are opened, on the other hand, the cavity is compressed by multi-steps contg. speed control and pressure control and thereafter, the top and bottom molds are opened by a specified amt. and after the resin compsn. for forming the base is foamed to form a foamed base layer, the foamed base layer is solidified by cooling. A multilayered foamed molded article constituted of the foamed base layer consisting of the polypropylene resin material and a skin layer consisting of the skin material can be reduced thereby.