Beads injection moulding device - has two symmetrical moulds provided with bead cavities co-linear with twine or wire supply ducts and sprue breaking pins

摘要

Injection mould is composed of two mating half moulds each half mould comprising a main plate provided with carrier element supply ducts and an insert plate having a pair of parallel spaced main injection ducts with which are associated auxiliary injection ducts which communicate with mould cavities co-linear with the supply ducts, one of the main plates being also provided with ducts connecting the mould to an injection moulding machine. Other plate is provided with array of upstanding pins passing through the insert plates and terminating in the injection ducts to break up the sprues on opening of the mould. Used in injection moulding beads, necklaces onto strings of twine or wire. Overflow of plastics material is prevented and sepn. of beads is facilitated.