| 摘要 |
PURPOSE:To make it possible both to injection mold a resin at a low pressure within a short period, and to lower the cost and the compressive strength of a mold and other members, by providing a shutter with a resin extruding hole between a shot cavity and a mold cavity normally slidably. CONSTITUTION:As an extrusion hole 23a of a shutter 23 is made very large relative to an extrusion hole of a conventional nozzle or die, the pressure for extruding a molding material may be low, and a motor 18 may be made smaller. Every corner of a mold cavity 29 can be filled with the resin within in a short period positively. A motor 24 is rotated to move the shutter 23 to the right, so that the excess resin entered the extrusion hole 23a is scraped off from the molded item and the extrusion hole 23a is moved outside a shot cavity 16 to remove the excess resin get into the extrusion hole 23a. |
