A new joining technology for hot-runner manifold plates is said to minimize resin hang-up spots, deliver smoother flow paths, and enhance performance of multi-material molds. The new plate-fusion technology was developed by Polyshot Inc., W. Henrietta, N.Y. After machining the flow channels, up to four manifold plates can be joined at a time with the proprietary process, now used on all its hot-runner manifolds. The fusion technology allows the melt-channel diameter to change from narrow to wide to narrow, as is often required in multi-material manifolds. The technology allows for gradual turns in the flow channel, eliminating "turn plugs" and secondary honing of the channel.
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