Process for the injection molding of fluid-filled plastic bodies

Details Process for the injection molding of fluid-filled plastic bodies Process for the injection molding of fluid-filled plastic bodies

1990-04-20

1993-04-20

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

With internal application of fluid pressure

2643288, 26432812, 26432813, 425812, B29C 4500, B29C 4534, B29D 2200

Patent

active

052040518

ABSTRACT:
The invention relates to a process for the injection molding of fluid-filled plastic bodies and a device to carry out this process, wherein a pressurized, flowable plastic melt is first injected by means of at least one nozzle into a mold cavity clamped by a two-part or multi-part mold until the mold cavity is completely filled. Next, after cooling of the plastic melt on the mold cavity walls has set in, a pressurized fluid is injected in such manner into the interior of the plastic melt located in the mold cavity that the still melted center of the resulting plastic body is expelled into at least one side cavity arranged outside the mold cavity and connected thereto.

REFERENCES:
patent: 3044118 (1962-07-01), Bernhardt et al.
patent: 4029454 (1977-06-01), Monnet
patent: 4101617 (1978-07-01), Friederich
patent: 4140672 (1979-02-01), Kataoka
patent: 4562990 (1986-01-01), Rose
patent: 4923666 (1990-05-01), Yamazaki et al.
patent: 5028377 (1991-07-01), Hendry
patent: 5032345 (1991-07-01), Hendry
patent: 5069859 (1991-12-01), Loren

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