A FILTER CARTRIDGE AND PROCESS

摘要

An injection moulding assembly ( 10 ) comprising a male moulding member ( 11 ) surrounded by a female moulding member ( 12 ) forming a void ( 13 ) between them that upon injection of molten plastics into the mould a container can be formed. The moulding assembly includes a guide rod ( 14 ) and ejection flange ( 16 ) and a pair of ejection flange guide rods ( 17 and 18 ), an air vent valve ( 15 ) and an injection passage ( 19 ). The male member ( 11 ) includes in this embodiment eight grooves ( 20 ) unevenly spaced so that the partially hardened container formed in the injection mould can be pushed from the mould using the ejection flange ( 16 ) while the container is sufficiently green to enable the ribs formed in the grooves ( 20 ) to move over the surface of the male mould ( 11 ) during the ejection process.