| 摘要 |
Method of injection moulding a plastics component includes providing a first mould member with a mould cavity, defined by an internal surface, and a second mould member with an external surface complementary to the mould cavity shape. Either the internal or external surface carry an elongate formation with an elongate apex. Then, the second mould member is advanced into the mould cavity such that the apex is spaced from the opposed one of the internal surface and the external surface by a predetermined distance and the internal surface of the first mould member and the external surface of the second mould member together define a mould space. Molten polyolefin material is then injected into the mould space to substantially fill it. The predetermined distance is so dimensioned that the polyolefin material does not completely fill the space between the apex and the opposed surface and the slit is thus formed.
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