Technique for stabilizing injection molded flowmeter liner

Details Technique for stabilizing injection molded flowmeter liner Technique for stabilizing injection molded flowmeter liner

1982-04-28

1986-06-03

Czaja, Donald

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

264255, 264261, 264263, B32B 3106

Patent

active

045928860

ABSTRACT:
A technique for stabilizing an insulating liner formed of thermoplastic material which is injection molded onto the inner surface of a metal spool having a cylindrical body provided with end flanges, an annular gap being created between the liner and the spool body due to differential shrinkage between the liner and the body as the molded liner cools and solidifies. In order to fill this gap to prevent a change in the inner diameter of the liner when the liner is subjected to the pressure of a fluid flowing therethrough, the spool body is provided with ports which extend between the exterior and interior surfaces thereof. These ports are sealed during the injection-molding process by removable plugs. After injection-molding, the plugs are removed and a thermosetting resin is introduced into one of the ports until the gap is filled as evidenced by the fact that the resin begins to rise in the other ports, the resin then being cured to solidify the filler.

REFERENCES:
patent: 2288661 (1942-07-01), Wadman
patent: 2803043 (1957-08-01), Stephens
patent: 3061887 (1962-11-01), Clarke
patent: 4104354 (1978-08-01), Hubbard
patent: 4171560 (1979-10-01), Garrett

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