| 摘要 |
PURPOSE:To obtain the titled product free from flashes, flaws suitable for a vehicle and excellent in appearance by a method wherein when the internal part of a cavity is charged with resin to reach a specific pressure, the resin in the cavity is expanded gradually and injection-molded. CONSTITUTION:To take an example, the metallic part 2 of an Al foil etc. as core material and decorative films 3, 4 are supplied to an extrusion die, a long member 6 having a resin part 5 molded by extrustion is cut to a specified length, an end part is inserted into an injection mold composed of a cavity block 8 and a core block 9 and these blocks are clamped. Then, resin is injected into a cavity 12 from an injection nozzle 10 through a gate 11 and kept at a fixed pressure. When the internal part of the cavity 12 is filled with resin and exceeds the specified pressure the pin 16 is inserted by the pressure toward the core block 9 at the front end of a pin 16 gradually against the compression of a spring 19 to expand the resin at this area. In this manner, the injected resin is incorporated in one body with the end part of the long member 6 to give a molding 1 with a resin end part. |
