Plastic and nonmetallic article shaping or treating: processes – Reactive gas or vapor treatment of work – Work is organic material
Patent
1975-08-18
1977-02-08
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Reactive gas or vapor treatment of work
Work is organic material
264 98, 264296, 264334, 425DIG215, 425DIG232, B29C 1707
Patent
active
040072436
ABSTRACT:
An improved method of blow molding thermoplastic articles of superior physical properties by orienting the material during the formation of the articles. A two-stage blowing operation is provided wherein a tubular parison is extruded at a preblowing station spaced from a separate final blowing station and simultaneously a previously blown preform is supported on a blow pin at the final blowing station. A preform blow mold is closed on the tubular parison while a final blow mold is closed on the previously blown preform and the enclosed tubular parison and preform are blown to the shapes of the enclosing molds. The blow pin is then retracted from the final blow mold, and the molds are shifted so that the preform blow mold is at the final blowing station, and the final blow mold is at a discharge station. The blow pin is then inserted into the mold at the final blowing station so that the preform in the mold will be supported on the blow pin. Both molds are then opened and are shifted back to the preblowing and final blowing stations, and the cycle is repeated. The preform is conditioned both thermally and dimensionally in the molds for most effective orientation during the final blowing operation.
REFERENCES:
patent: 2128239 (1938-08-01), Ferngren
patent: 3114932 (1963-12-01), Donnelly
patent: 3278666 (1966-10-01), Donald
patent: 3329996 (1967-07-01), Marcus et al.
patent: 3718724 (1973-02-01), Holzmann et al.
patent: 3752627 (1973-08-01), Bourgeois et al.
patent: 3781395 (1973-12-01), Uhlig
Hoover Ball and Bearing Company
Silbaugh Jan H.
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