Method for molding elastomeric profile members

Details Method for molding elastomeric profile members Method for molding elastomeric profile members

1998-09-25

2000-09-26

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Plural sequential shaping or molding steps on same workpiece

264320, 264326, 425395, 425408, 425411, 1561101, 1563042, 1563045, 1563046, B29C 4304, B29C 4314, B29C 6502, B29C 6518

Patent

active

061238910

ABSTRACT:
A method for molding a closed profile member such as a sealing gasket, sequentially comprising a static step of molding a series of contiguous segments of an unprocessed strip with two ends. Each segment is moved substantially over its own length so that it is replaced by the following segment once it has been molded, and the final segment is made by juxtaposing, connecting and molding the two ends of the unprocessed strip together. A mold with two mold tools operative along part of its length is used to carry out the method. A temperature gradient is generated so that the temperature at the mold ends is 25-35.degree. C. lower than the temperature at the center. The mold is part of a fixed or portable device including mold heating means and means for exerting pressure on the unprocessed strip.

REFERENCES:
patent: 2184630 (1939-12-01), Alexander
patent: 2343117 (1944-02-01), Vincent
patent: 4680071 (1987-07-01), Candle
patent: 5110274 (1992-05-01), Hatai et al.

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