Plastic article or earthenware shaping or treating: apparatus – Female mold and means to shape parison directly by internal...
Patent
1991-12-13
1993-05-25
Chiesa, Richard L.
Plastic article or earthenware shaping or treating: apparatus
Female mold and means to shape parison directly by internal...
425526, 425529, 425533, 425534, B29C 4930
Patent
active
052138224
ABSTRACT:
An injection stretch blow molding apparatus performs a cycle of molding steps by circulating a plurality of neck mold sets for holding the neck portions of preforms. In a first portion of the operating sequence, a neck mold used in the injection molding stage to mold a preform, is conveyed from one end of a horizontal path of movement for conveying said neck mold to the stretch blow molding stage disposed at the other end of the horizontal path of movement. In a second portion of the operation sequence a neck mold, from which a blow molded product has been ejected in the ejection stage, offset vertically from the middle of the horizontal path of movement, is returned back to the injection molding stage, which is empty, through a vertical path of movement connecting the horizontal path of movement with the ejection stage and through the horizontal path of movement, after the first portion of the operating sequence has started. In a third portion of the operating sequence a neck mold, holding a container blow molded in the stretch blow molding stage, is conveyed to the ejection stage, which is empty, through the horizontal and vertical paths of movement after the second portion of the operating sequence has started. The entire system can be reduced in size, with the span between the tie rods being minimized and with the space of installation being reduced, even if a container having an increased bore diameter is to be molded in this system.
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Patent Abstracts of Japan, vol. 8, No. 197 (M-324) [1634] Sep. 11, 1984.
Chiesa Richard L.
Nissei ASB Machine Co. Ltd.
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