Nozzle valve gate apparatus with wiper seal

Details Nozzle valve gate apparatus with wiper seal Nozzle valve gate apparatus with wiper seal

B - Operations, Transporting

29

C

B29C 45/20 (2006.01)

Patent

CA 2735018

A nozzle valve gate for injecting hot plastics into an injection mold includes a body having a passage for flow of the plastics to an outlet and forming an actuator chamber. A nozzle part is connected to the body and extends longitudinally to a nozzle tip having an injection aperture. The nozzle part has a flow passageway connected to the plastics outlet for conducting the plastics melt to the injection aperture and a machined bore forming a guide passageway. A valve pin is movable in the guide passageway between open and closed positions. A piston is connected to the pin and is slidable in the actuator chamber. An elastomeric wiper seal extends around the valve pin adjacent the machined bore, is wear resistant, and can withstand high temperatures of at least 200°C. A micro gap is formed between the pin and the machined bore.

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