| 摘要 |
An L-shaped hot runner tube for plastic injection molds. The tube inlet and outlet slide snugly in bores in a sprue bushing and cavity plate respectively, so that as the runner expands and contracts, its ends can move. The tube ends can be sealed by a sleeve seal having a portion overlying the tube and of less diameter than the bore, and having a projecting portion of diameter slightly greater than that of the bore, enabling a good seal while reducing heat flow from the hot runner. Semi cylindrical heaters can be clamped to the sides of the tube and are removable without disassembling the ends of the tube.
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