Abstract: Apparatus for molding consecutive streams of differently and homogeneously colored resin in a single mold. The apparatus is used to practice a method including supplying molten resin to a selected one of a plurality of resin passages, injecting colorant selected from a plurality of different colorants into the resin passage, mixing the molten resin and colorant in a mixing element disposed in the resin passage to form a mixture of selectively colored resin, injecting the mixture into the single mold to form a part from the selectively colored resin, and repeating the process by selecting a different resin passage and a different colorant. By this apparatus and method, differently colored parts can be molded without purging the resin passages between the molding, of the parts.

Abstract: A grommet assembly for providing a location for a fastener to attach a cover member to a support structure includes first and second flange members. The flange members are sonically weldable to each other and are adapted to sandwich the cover member therebetween. Each of the flange members defines a passageway portion and has a recess portion. At least one of the flange members has a plurality of protrusions. The first and second flange members, upon being sonically welded together, cooperate to define a passageway with the passageway portions, and further cooperate to define a recess with the recess portion. The passageway is adapted to receive the fastener, and the recess is adapted to receive the cover member. The protrusions extend into the passageway and are engageable with the fastener.

Abstract: Opaque, thermoplastic molding compositions comprising a grafted rubber phase and a matrix phase comprising styrene, acrylonitrile, and from 1 to 18 percent of a lower alkyl methacrylate and having improved colorability are disclosed.