| 摘要 |
PURPOSE:To efficiently manufacture a variety of workpieces by a method wherein an injection cylinder unit and an injection mold unit, both of which are optimum for the working of workpiece, are selected in accordance with the kind of workproduct so as to be mounted at the tip of a screw type extrusion equipment. CONSTITUTION:Molten resin is forced through the feeder 11b of a screw type extrusion equipment 2 into an injection cylinder 20. When the forcing of the molten resin in the cylinder is finished, the flow of the hydraulic oil supplied to a hydraulic cylinder 23 is changed over by means of an oil pressure selector valve 24 so as to pour the molten resin forced into the injection cylinder 20 under elevated pressure into the mold cavity of an injection mold unit 29. At this time, an oil pressure selector valve 39 is changed over so as to shift a lower mold 33 upwards in order to obtain a desired molded piece. In this case, any proper injection cylinder 20 out of injection cylinders 20 with various capacities is mounted, provided that the outer diameter of the injection cylinder 20 is the same as one another, in order to obtain a desired molded piece. Further, the mold can also be replaced with another mold only be unscrewing bolts 31 and 32 so as to obtain a molded piece with a desired shape.
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