Abstract: A mold valve assembly includes a mold valve chamber having an output port and an injection chamber in communication with the mold valve chamber. A first actuator drives an injection piston within the injection chamber to drive mixture material from an inlet port into the mold valve chamber. A second actuator drives a mold valve piston along the mold valve axis within the mold valve chamber to drive mixture material through an outlet and into a mold cavity of a mold assembly. The mold valve piston closely fits within the mold valve chamber to scrape along an end segment of the injection piston to clean any mixture material remnants therefrom such that remnants within the mold valve chamber are minimized and the necessity of flushing between injection cycles is substantially eliminated.

Abstract: A mix head assembly including a mix chamber having a mixer rotatably mounted therein. The mixer extends for a longitudinal length and defines a multiple of vanes which agitate the fluid material components as the mixer is rotated. A plunger is movably mounted in the mix chamber relative to the mixer. As the plunger is driven relative the mixer, the plunger scrapes the fluid material off the mixer such that no remnants remain within the mix chamber.

Abstract: A joint for a molded tub and surround which is formed of a multiple of portions. Mating wall surfaces are formed on both wall portions which extend generally parallel to the wall portions. An outer generally trapezoidal pair of surfaces are formed laterally spaced from the joint to engage a pair of parallel engagement surfaces substantially perpendicular to said first and second wall portions, and an angled engagement surface between said parallel engagement surfaces. One or more clips are received on the trapezoidal surfaces to further urge the surfaces into contact. The clip biases the two wall portions into contact such that there is a water tight seal at the joint.