RESIN MOLD

PURPOSE:To obtain a mold not impaired in strength, good in dimensional accuracy, free from a sink and having a smooth surface by adding a prescribed amt. of air bubbles to the resin layer of a resin mold. CONSTITUTION:A resin mold has a resin layer formed as a molding surface layer by the transfer f...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	ISHIKURA YASUAKI, YAMASHITA TSUTOMU
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:	PURPOSE:To obtain a mold not impaired in strength, good in dimensional accuracy, free from a sink and having a smooth surface by adding a prescribed amt. of air bubbles to the resin layer of a resin mold. CONSTITUTION:A resin mold has a resin layer formed as a molding surface layer by the transfer from a model and can also have a reinforcing layer other than the resin layer. The amt. of air bubbles contained in the resin layer is set to 3-20vol.%. The number of contained air bubbles with a diameter of 200mum or less is pref. 30% or more of the total number of air bubbles. By this constitution, no sink is generated at the time of the molding of the resin mold and the transfer property from the model is excellent and the necessity of repairing after demolding is eliminated.