Plastic article or earthenware shaping or treating: apparatus – Female mold and means to shape parison directly by internal... – Including means to prepare parison
Patent
1988-09-23
1989-05-30
Chiesa, Richard L.
Plastic article or earthenware shaping or treating: apparatus
Female mold and means to shape parison directly by internal...
Including means to prepare parison
264532, 4254501, 4254519, 425541, B29C 4956
Patent
active
048346420
ABSTRACT:
A stretching and blow-molding apparatus for producing hollow bodies from thermoplastic plastics material comprises a rotatable blow wheel assembly on which a number of molds are mounted. Each mold comprises two mold halves mounted on a common pivot. The apparatus includes a locking device which has a frame-like configuration and comprises a continuous shaft which passes through a set of aligned bores formed in pawls provided on the external surface of one mold half and a locking member which comprises a plurality of locking sections disposed in aligned bores formed in pawls provided on both mold halves, which pawls are interdigitated in the locked position. The uppermost and lowermost locking sections are connected to the continuous shaft. Vertical movement of the continuous shaft or of the locking section causing corresponding vertical movement of the other. The individual locking sections have a length corresponding to the length of the bore in each pawl and end-abut one another. By raising or lowering the frame by a few centimeters so to move each individual locking member from a position in which it is totally located in a single bore to a bridging position in which it is disposed in the bores formed in two adjacent, interdigitated pawls formed on different mold halves, locking over the entire length of the mold joint can be achieved.
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Mank Manfred
Voss Hermann
Chiesa Richard L.
Hermann Berstorff Maschinenbau GmbH
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