Device and method for producing multicomponent plastic parts

A system for producing a polyurethane-coated thermoplastic part, comprising:

• at least one mold having an enlarged cavity configured for receiving a thermoplastic molded part, said enlarged cavity having at least two cavity spaces configured for alternating fluid connection to a sprue;
• a clamping unit receiving the at least one mold;
• and
• at least one first polyurethane unit for introducing a first polyurethane material into at least one part of the enlarged cavity, and for introducing an additional polyurethane material with different product properties into a different part of the enlarged cavity or into another enlarged cavity,
• wherein at least one mold is exclusive to the polyurethane unit.

A method for producing a polyurethane-coated thermoplastic part, comprising the steps of:

• inserting a thermoplastic part into a cavity or forming a thermoplastic part in a mold cavity;
• forming a first larger mold cavity around the inserted or formed thermoplastic part;
• filling the first larger mold cavity with a first polyurethane material having a first material property;
• forming a second larger mold cavity around the thereby formed part;
• and
• introducing at least one additional polyurethane material with a material property different from the first material property in the second larger mold cavity;
• wherein the second larger mold cavity is also at least partially bounded by the thermoplastic part.