| 摘要 |
PROBLEM TO BE SOLVED: To enable a dissolution of a gas such as a carbon dioxide or the like of a quantitatively and economically necessary amount in a molten resin in an injection cylinder 2 in which a screw 23 is intermittently rotated in an injection molding machine for supplying the gas to the cylinder 2 and injecting the molten resin in which the gas is dissolved. SOLUTION: The injection molding machine comprises a two-stage type screw 23 in which a stage having a feeding unit, a compressing unit and a metering unit sequentially constituted from a hopper 8 toward a distal end is repeated twice in series and the injection cylinder having a gas supply unit connected to a gas supply passage 27 opened at the feeding unit of the screw second stage 23b at the distal end and a flow controller 28 of a high flowing resistance of the molten resin at the metering unit of the screw first stage 23a.
|
