Process for making a plastic container by blow molding

Details Process for making a plastic container by blow molding Process for making a plastic container by blow molding

1988-12-16

1990-09-25

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264235, 264265, 264346, 264515, 425503, 425508, B29C 4904, B29C 4920

Patent

active

049591908

ABSTRACT:
The process for making a plastic container by blow molding of a tubular parison made of a thermoplastic material, includes guiding a tube into a divided open blow mold, closing the blow mold and feeding pressurized air in the tubular parison squeezed off in the blow mold. However in the open blow mold which has a suitable receptacle at least one single-piece hoop ring made of thermoplastic material which could be made with usable tolerances by injection molding is mounted on the section and bonded with the tubular parison. An unsorted container ring which has an outer collar is used in the process and is fed to a preheat station in which the container ring is made stress-free and simultaneously is oriented in a plane. The stress-free and oriented container ring is gripped on the collar with a manipulator whose gripper is oriented in a plane corresponding the plane of the container ring and the manipulator is guided in the open blow mold and delivered to a moveable holding means in the blow mold which engages on the container ring itself or the collar.

REFERENCES:
patent: 3886253 (1975-05-01), Friendship
patent: 4093683 (1978-06-01), Harley
patent: 4426349 (1984-01-01), Kirschner
patent: 4719072 (1988-01-01), Kojima et al.
patent: 4830807 (1989-05-01), Warren et al.

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