Method of molding manifold for automotive vehicle

Details Method of molding manifold for automotive vehicle Method of molding manifold for automotive vehicle

1994-03-21

1995-08-29

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

425112, 425525, B29C 4920

Patent

active

054457823

ABSTRACT:
In general, the molding of tubular plastic articles such as automotive inlet manifolds with flanges thereon is a difficult and expensive procedure. A simple solution to the problem is the blow molding of the tubular article in a conventional blow molding apparatus followed by the injection molding of the flange around the tubular article in a conventional injection molding apparatus. In the case of an intake manifold, the outlet ends of the manifold pipes are placed in the injection mold, which is closed to define a cavity around the ends of the pipes, and the flange is then molded onto the pipes. Preferably, the ends of the pipes are heated for the injection molding step to ensure good adhesion between the pipes and the flange.

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