Plastic and nonmetallic article shaping or treating: processes – Reactive gas or vapor treatment of work – Work is organic material
Patent
1975-10-14
1978-01-03
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, 425530, B29C 1707
Patent
active
040667260
ABSTRACT:
A multi-stage blow molding method for conversion of synthetic thermoplastic parisons into hollow shaped articles includes extruding parisons at a first station, z transferring parisons from the first station to a second station (by moving the extrusion machine, by moving the parison with a gripper or by moving the parison while it is confined in the cavity of a first open-and-shut mold), converting parisons into hollow blanks or preforms at the second station, converting the blanks into shaped articles in the cavity of a second open-and-shut mold, and ejecting shaped articles from the second mold at a third station. The second mold can move between the second and third stations, or the blowing mandrel which cooperates with the first mold to convert parisons into blanks moves from the second to the third station to transfer the blanks from the second station into the second mold at the third station. In each instance, the mandrel which cooperates with the first mold to convert parisons into blanks also cooperates with the second mold to convert blanks into shaped articles.
REFERENCES:
patent: 2715751 (1955-08-01), Weber
patent: 3325862 (1967-06-01), Mehnert
patent: 3632261 (1972-01-01), Gasiot et al.
patent: 3718724 (1973-02-01), Holbmann et al.
patent: 3767747 (1973-10-01), Uhlig
Kontler Peter K.
Silbaugh Jan H.
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