Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Forming plural articles
Patent
1989-08-28
1991-04-16
Heitbrink, Jill L.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Forming plural articles
26432811, 425185, 425588, 425575, B29C 4504
Patent
active
050080636
ABSTRACT:
A press for molding thermoplastic, thermosetting, polyurethane polymeric articles includes three workstations arranged side by side and including a central molding station and two lateral stations for cooling and extracting molded articles. Two molds are rigidly connected to one another and controlled by a transfer pusher which alternately moves the molds from the molding station to either of the cooling and extraction stations. A first presser at the central molding station applies a closure pressure necessary for the material injection, while auxiliary presser arranged in each station applies a reduced secondary pressure to the molds at the end of the injection step, during the translatory motion of the mold and during the cooling step.
REFERENCES:
patent: 3982869 (1976-09-01), Eggers
patent: 4050666 (1977-09-01), Van Tichelt
patent: 4088432 (1978-05-01), Farrell
patent: 4139593 (1979-02-01), Holz et al.
patent: 4205950 (1980-06-01), Suss et al.
patent: 4439123 (1984-03-01), Sano et al.
Brizio Giuseppe
Margiaria Giorgio
Fiat Auto S.p.A.
Heitbrink Jill L.
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