| 摘要 |
<p>Compressive injection moulding equipment comprising a main sprue for channelling molten thermoplastic material into a compression type mould adapted to reduce the dimensions of the mould cavity during the injection process; a secondary sprue and runner system in fluid communication with the main sprue adapted to divert thermoplastic material to a position whereat it may directly or indirectly urge a component of the mould towards a complementary mould component thereby reducing the cavity dimensions; flow restrictors and/or controllers to control the flow of thermoplastic material in the secondary sprue thereby regulating the timing and rate of mould closure by reference to the pressure of thermoplastic material in the main sprue.</p> |
