| 摘要 |
<p>A method of moulding a plastics material in a mould cavity is described which relies primarily on movement of a part of the mould to provide the pressure necessary to force the plastics material melt to fill all the parts of the mould cavity. The method comprises the steps of applying a light pressure to close the mould, injecting a predetermined quantity of molten plastics material into the mould cavity at a pressure which is such that the injection of the plastics material can cause the cavity to expand in volume against the resistance of the light closing pressure, and applying a high pressure to close the mould fully after completion of the injection step.</p> |
