| 摘要 |
An injection molding head (10) designed to attach to a prior art extruder (110) 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 (20) having an outlet end opening, an inlet end portion (22) having an inlet end opening, a center member (30) having an inlet passage with an inlet opening and an outlet passage with an outlet opening, and first and second transfer units (40, 50). The first and second transfer units (40, 50) are disposed opposite the other with the center member (30) therebetween. The center member (30) including a center bore (32), 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 (34) having a rotary member (34B) disposed within the center bore (32) of the center member (30) defining a first partitioned area and a second partitioned area. The rotary member (34B) having a first flow channel (36A) that directs material to the first transfer unit (40) , and a second flow channel (36B) that directs material to the second transfer unit (50). In the preferred embodiment, the inlet opening having an approximate 25,8 - 77,4 cm<2 >(4 - 12 square inch) cross section; and the outlet opening having an approximate 4,84 cm<2> (.75 inch) cross section; and, the internal pressure of extruding the materials is under 137,9 bar (2000 psi). |
