| 摘要 |
A moulding method comprises extruding a quantity of plastics material and then compression moulding the extruded plastics material into the desired shape. An apparatus suitable for the method comprises an extruder 10 arranged to extrude material into a container 12, 14 and a compression moulding press 20. Preferably, the plastics material is extruded into an intermediate container to pre-mould the plastics material into the general shape of the final product; the container is then transferred on a transfer device 22 to the moulding press. One or more containers may be provided, the extruder being arranged to extrude material continuously into the containers in turn a valve arrangement 16 may be used to control which of the containers the material is extruded. Additional moulding presses may be provided associated with each of the containers. The transfer device may be arranged to move the container to a position above the lower half of the mould and to tip the extruded material into the cavity. |
