BLOW MOLDING

PURPOSE:To simplify mold structure and reduce the raw material, by inserting by suction and penetrating a parison through the whole of a flexed cavity, then closing a valve in suction passage leading to the cavity, and executing the blow-in of air as keeping a hermetic condition in the parison. CONS...

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Bibliographic Details
Main Authors IMAI KAZUYOSHI, HIROSE HIROYUKI, WATANABE SHIGERU, OKAWA YASUNOBU
Format Patent
LanguageEnglish
Published 25.12.1986
Subjects
AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES
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:PURPOSE:To simplify mold structure and reduce the raw material, by inserting by suction and penetrating a parison through the whole of a flexed cavity, then closing a valve in suction passage leading to the cavity, and executing the blow-in of air as keeping a hermetic condition in the parison. CONSTITUTION:A suction pipe 10 forming a suction passage 9 within it is connected to the lower outlet part of a cavity 2, where within the suction pipe 10 a shut valve 11 is provided. At the state of valve 11 opened, outside air flows into the cavity 2 by actuating a suction pump. The parison 12 is conducted with this air flow, then inserted and penetrated through the whole of flexed cavity 2. Next the valve 11 is closed, and after the bottom end part of parison is made into hermetic condition, air is blowed into the parison 12 from the blowing hole 8 of extrusion die 5, then molding is executed.
Bibliography:Application Number: JP19850137466