Importance

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Abstract

Thin-walled elongated tubular products are individually formed utilizing injection molding of a plastic melt into a mold cavity having an elongated core pin maintained in substantially centered relation on the interior thereof through the application of tension continuously being applied coaxially to the core pin. Multi-unit or mass production techniques include use of a plurality of mold cavities each successively subjected to receiving a hot plastic melt injection wherein the resulting formed product is, through successive steps, removed from the mold cavity, trimmed, separated from the core pin, and possibly further processed for depositing in collection facilities or transferred to other processing steps. Concurrently, each mold cavity and associated core pin are initially separated, processed separately and reunited for continued and repeated use and further subjected to precise and preprogrammed positioning relative to the inflow of plastic melt in order to overcome any imbalance or inconsistency in flow characteristics of the flow of the hot melt into the mold cavity.

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First Claim