Plastic article or earthenware shaping or treating: apparatus – Shaping surface including means to release or remove product... – By movable ejector means entering mold cavity
Patent
1987-11-09
1989-08-29
Hart, Charles
Plastic article or earthenware shaping or treating: apparatus
Shaping surface including means to release or remove product...
By movable ejector means entering mold cavity
4254516, 425547, 425554, 425575, B29F 100
Patent
active
048612588
ABSTRACT:
A press for moldinig thermoplastic, thermosetting, polyurethane polymeric articles comprises 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.
Brizio Giuseppe
Margiaria Giorgio
Fiat Auto S.p.A.
Hart Charles
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