Manifold Design Features Compression-Seated Nozzles

Thermoplay has developed a hot runner manifold that features balanced flow channels and has nozzles seated to it by mechanical compression, enabling them to be always centered within the mold cavity and reducing wear in the coupling zone.

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Thermoplay has developed a hot runner manifold that features balanced flow channels and has nozzles seated to it by mechanical compression, enabling them to be always centered within the mold cavity and reducing wear in the coupling zone. The nozzle plate is conditioned to have the same temperature as the mold (30°C).

This is unlike common injection system made up of an unbalanced manifold with nozzles threaded on it. These nozzles are often free flow and are heated by the heat transferred by conduction from the manifold.

In the Thermoplay design, an outer body is screwed externally on each nozzle (so that it can be easily removed), which couples with the forming cavity. All nozzles are provided with plastic sealing zones to avoid plastics leakage and to guarantee a high-quality injection point on the preform.

Other benefits include material uniformly distributed on the product and even wall thickness; no strands at the injection point, color streaks or discoloring; tighter tolerances on the bottle neck; temperature detection close to the injection point; uniform heat distribution on the whole nozzle length; nozzle bushing replacement with nozzle drive and tightness; a complete self-standing hot half, ready for installation and suitable to virtually any press machine; and direct injection systems with a shutoff option.