MOLD ASSEMBLY FOR PARTIAL FOAMING INJECTION MOLDING AND METHOD FOR PARTIAL FOAMING INJECTION MOLDING USING THE SAME

PROBLEM TO BE SOLVED: To enable efficient molding of a non-foamed part and a foamed part in a state of being integrated and excellent in an external appearance, in injection molding using thermoplastic resin. SOLUTION: A movable half is divided into a main block 6, a mold block 7 for preparing a non...

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Bibliographische Detailangaben
Hauptverfasser:	MISUMI MASAKI, SHINADA TSUNETOSHI, KURONO SATORU
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS 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 enable efficient molding of a non-foamed part and a foamed part in a state of being integrated and excellent in an external appearance, in injection molding using thermoplastic resin. SOLUTION: A movable half is divided into a main block 6, a mold block 7 for preparing a non-foamed part and a mold block 9 for preparing a foamed part and it is so constructed that these blocks can be driven to move forward and backward independently respectively. After resin 13 is filled in a cavity, first the mold block 7 for preparing the non-foamed part is made to advance into the cavity so as to enhance resin pressure and thereby mold transferability is improved, and then the mold block 9 for preparing the foamed part is made to withdraw so as to lower the resin pressure in the part. Thereby only this part is foamed.