A plastic or elastomeric foam cavity filler, useable for filling of cavities such as are found in vehicles, ships, boats, mobile or modular homes, buildings, machinery, and equipment comprises a flexible pouch containing at least one material suitable for chemical or thermal activation which, upon activation of the material, the flexible pouch is placed in a cavity. The material expands the pouch to fit the cavity in which it was placed, restricting the entrance of, or transmission through, of noise, vibration, or fumes. When more than one foam component material is used, the component materials are separated within the flexible pouch. Among the means of separation are a pouch within the flexible pouch or barriers forming separate compartments in the pouch.
An injection molding head designed to attach to a prior art extruder designed for extruding relatively large slabs of epoxy based adhesive materials, including materials that may be filled with glass beads or fibers. The injection molding apparatus constructed according to the preferred embodiment of the present invention as described utilizes cooler temperatures and lesser internal pressure during the extruding process than does conventional plastic injection molding machines. The preferred embodiment generally includes an outlet end portion having an outlet end opening, an inlet end portion having an inlet end opening, a center member having an inlet passage with an inlet opening and an outlet passage with an outlet opening, and first and second transfer units. The first and second transfer units are disposed opposite the other with the center member therebetween. The center member including a center bore, an inlet passage in fluid communication with the inlet end portion, and an outlet passage in fluid communication with the outlet end portion. The present invention further includes a rotary valve having a rotary member disposed within the center bore of the center member defining a first partitioned area and a second partitioned area. The rotary member having a first flow channel that directs material to the first transfer unit, and a second flow channel that directs material to the second transfer unit. In the preferred embodiment, the inlet opening having an approximate 4-12 square inch cross section; and the outlet opening having an approximate 0.75 inch cross section; and, the internal pressure of extruding the materials is under 2000 psi.