| 摘要 |
PURPOSE:To obtain a product excellent in appearance and physical properties in high speed cycle by a method wherein the mold closing is stopped or decelerated in the midway of the closing motion so as to specify the clearance between the bottom surfaces of a top force and of a bottom force in order to supply molten resin to the clearance through a resin passage and the mold closing is re-started simultaneously with or just before the completion of the supply of the resin and a supply port is closed in order to apply pressure to the resin. CONSTITUTION:The mold closing is stopped or decelerated in the midway of the closing motion in order to supply molten resin 8 through a resin passage 7 provided in a bottom force. In this case, the supply of the resin is performed under the performed under the condition that the clearance 6 between the major portions of the bottom surfaces of a top force and of a bottom force lies in the range from 50mm. or less and to 0.1mm. or more plus the thickness of wall of a molded part at the portion corresponding to that of the forces. When the supply of the predetermined amount of the molten resin 8 is completed, the supply of the molten resin from an accumulator is stopped. Simultaneously, a piston 72 is pushed up so as to bring the surface of the tip of the piston 72 in flush with the surface of the bottom force or to a position 74 so as to close the resin passage 7 and a cavity space 5 in order to press-mold the resin. |
