Abstract: A method for forming an overmolded component, includes arranging a first mold part and a second part with at least part of a first mold cavity defined by the first mold part and the second mold part, providing material to form a substrate into the first mold cavity, providing an overmold cavity that is defined at least in part by the substrate, one or both of the first mold part and second mold part, and a seal that engages the substrate and also engages one or both of the first mold part and the second mold part, and providing material for an overmolded layer in the overmold cavity. The overmold layer may be formed from a material having low viscosity and the seal inhibits or prevents overflow of the overmold material to reduce or eliminate formation of flash at parting or junction lines in the molding process.

Abstract: A process for edge sealing during an overmolding of a polyurethane on a substrate part comprising the steps of: A. Providing an injection mold cavity including a first side platen forming mold and a second side mating part forming platen; B. Molding a substrate part formed between the first side platen and the second side mating part forming platen; C. Providing a second overmold cavity for overmolding a polyurethane or other covering over the substrate part; and D. Providing a seal at the flashing edge of the second overmold cavity and overmolding the polyurethane or other covering over the substrate part such that there is substantially no flashing material where the seal is located.