VENTED MOLD AND USE THEREOF

A novel method of molding an article includes providing a mould with a vent of a pre-determined size such that, due to the difference in viscosities, gases to be vented from the mold may easily pass through the vent while the material to be molded cannot quickly pass through the vent. In fact, the v...

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Bibliographic Details
Main Authors WETERING, GERRY VANDE, CHENG, WILFRED WANG TAI, MAGEE, ROBERT BASIL, CLARK, LESLIE EDWARD, HUNTER, CRAIG ALLEN
Format Patent
LanguageEnglish
French
Published 03.09.1996
Edition6
Subjects
AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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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Summary:A novel method of molding an article includes providing a mould with a vent of a pre-determined size such that, due to the difference in viscosities, gases to be vented from the mold may easily pass through the vent while the material to be molded cannot quickly pass through the vent. In fact, the vent is designed such that the material to be molded which enters the vent, does not exit the end of the vent. In the most preferred embodiment, the vent is in the form of a thin ribbon-like groove so that the material to be molded which does enter the vent forms a thin ribbon of extruded material which need not be removed prior to a finish cover being applied to the molded article.
Bibliography:Application Number: CA19922077363