| 摘要 |
In the molding of foamed or unfoamed plastic articles, particulate material is introduced into the resin mix as a separate slurry through a separate orifice and under pressure lower than that used to force the primary resin compounds into the mixing head whereby the abrasive effect of the particulate material is reduced or eliminated. The slurry is supplied to the mixing head (10) from a storage and supply system (32, 36, 38, 40, 42) separate from the systems which store and supply the primary resin components (A, B). The particulate material may constitute reinforcement for a plastic article, in which case short lengths of glass, carbon, graphite or other mineral or metal fibers may be used. Alternatively, granular particulates such as carbon black, metal or mineral oxides, pigments, may be incorporated for coloring the product, or increasing its resistance to actinic rays, or for imparting increased rigidity to the molded product. <IMAGE> |
