EXTRUSION ASSISTED ROTATIONAL FOAM MOLDING PROCESS

摘要

An extrusion assisted rotational foam molding process includes the steps of precharging a mold with a plastic; rotating and heating the mold until the plastic melts and coats the inside of the mold thereby producing a solid skin; removing the mold from the oven; injecting foamable extrudate including a heat activated blowing agent into the mold and rotating the mold; reinserting the mold into the oven in order to induce decomposition of the heat activated blowing agent contained in the extrudate and produce a foamed layer inside of the solid skin; and cooling the mold to produce a foamed product with an outer skin. A molding apparatus includes a mold, an arm, an extruder and an oven. The mold has an interface device. The arm is adapted to rotate the mold. The extruder is operably connected to the interface device. The oven is adapted to heat the mold.