| 摘要 |
PURPOSE:To enable formation of a circuit on an uneven surface of a resin molded article simultaneously with molding, by making use of magnetic substance by forming a circuit pattern based on magnetism on the surface of a cavity of a mold obtained by combining a magnetic material and non-magnetic material with each other. CONSTITUTION:A male and female molds 2, 3 of a mold 1 are constituted of magnetic materials 21, 31 and non-magnetic materials 22, 32. then a circuit pattern constituent part 4 for which the magnetic material of high permeability and high saturated magnetic flux density is used is formed on the surface of a cavity of the male mold 2 on a movable side. Magnetic substance 7 is stuck to one face of a thin plate like an acrylic plate through electrostatic force, which is held on a parting line by situating the same on the movable side. When the mold 1 is positioned underneath magnetic flux, the magnetic substance 7 is moved to the surface of the cavity on a male side in the air through magnetism and adheres to the circuit pattern constituent part 41. Injection molding is performed by casting molten resin through a sprue 6 after mold clamp. When the mold is broken by cooling the same, simultaneously with molding a pattern of the magnetic substance 7 is transferred on the surface.
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