| 摘要 |
PURPOSE: A seat manufacturing method for a vehicle is provided to easily make seats in a desired form by foaming urethane to have different hardness, to variously secure shock-absorbing properties of the seat, and to automatize a seat producing process by removing a sponge attaching process in foam-producing the seat and improve productivity. CONSTITUTION: A seat manufacturing method for a vehicle is composed of steps of foaming first hardness polyurethane from a first hardness raw material injection port into a lower mold(D) at a constant thickness and forming a first hardness polyurethane layer(U1); foaming second hardness polyurethane from a second hardness raw material injection port into the first hardness polyurethane layer in the lower mold at the constant thickness and forming a second hardness polyurethane layer(U2); and foaming third hardness polyurethane from a third hardness raw material injection port(N3) into the second hardness polyurethane layer in the lower mold at the constant thickness and forming a third hardness polyurethane layer(U3). Consequently, the seat has shock absorbing performance and firmness by polyurethane layers having different hardness.
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