| 摘要 |
<p>Injection moulding machine has a worm screw feeder plasticiser interconnected with an injection cylinder by a filling duct which communicaters also with the injection duct by means of a three-way valve. In one position of the valve the plasticiser cylinder communicates with the injection cylinder to force its piston back due to discharging and in its other position, the cylinder communicates with the injection nozzle. Setting of impurities is prevented or danger reduced and provision of cleaning of machine is made.</p> |
