Method for simultaneously molding portions of separable article

Details Method for simultaneously molding portions of separable article Method for simultaneously molding portions of separable article

1994-01-31

1995-08-22

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Including use of vacuum

264257, 264313, 264510, 264516, 425389, B29C 5110, B29C 5128

Patent

active

054437849

ABSTRACT:
A method is disclosed for simultaneously molding separate portions of an article which may be subsequently assembled to form the complete separable article. Apparatus for carrying out the method includes separate mold portions which, when assembled, define a molding cavity in which each of the mold portions has an outwardly extending flange. The mold portions are fastened together such that the flanges are spaced apart a distance at least twice as great ad the thickness of the article to be molded. The mold portions extend along a longitudinal axis and each defines a molding surfaces which extends around the axis less than 360.degree.. When the mold portions are assembled, the molding surfaces extend completely around the longitudinal axis. The mold also includes silicone bead elements extending along the longitudinal axis in the space between the spaced apart flanges. The bead elements also define molding surfaces which bear against a portion of the molding material and urge it into contact with the surfaces of the flanges to form flanges on the molded portions of the article. The method for simultaneously molding separate portions of the article involves separating the mold portions, placing a molding material, such as a prepreg of composite material in the portions such that the prepreg bears against the molding surfaces and assembling the first and second mold portions together with the bead elements and a vacuum pouch located within the molding cavity. The mold portions are assembled with the silicone bead elements extending along the space defined between the adjacent flanges.

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