Abstract: In a slush molding process for producing a boot or shoe from a plastisol, a mold in the shape of the article of footwear is filled with liquid plastisol, the mold is heated to form a skin, the mold is tilted to pour out excess plastisol, and, after filling the heel cavity of the mold, the skin and heel filler are cured or hardened, and the skin is removed from the mold and trimmed for further processing. Instead of filling the heel cavities of the molds with a specially formulated heel filling composition, the skin trimmings, which were previously discarded as waste, can be ground, if necessary, mixed with additional stabilizer and injected into the heel cavities using an injection unit. With the molds travelling along a straight line path of travel, it is necessary to cause the nozzle end of the injection unit to move in synchronism with the molds.

Abstract: In a slush molding process for producing a boot or shoe from a plastisol, a mold in the shape of the article of footwear is filled with liquid plastisol, the mold is heated to form a skin, the mold is tilted to pour out excess plastisol, and, after filling the heel cavity of the mold, the skin and heel filler are cured or hardened, and the skin is removed from the mold and trimmed for further processing. Instead of filling the heel cavities of the molds with a specially formulated heel filling composition, the skin trimmings, which were previously discarded as waste, can be ground, if necessary, mixed with additional stabilizer and injected into the heel cavities using an injection unit. With the molds travelling along a straight line path of travel, it is necessary to cause the nozzle end of the injection unit to move in synchronism with the molds.