DME University

Plastic Injection Molding Nozzles

Injection Unit Nozzles

The nozzle is located at the end of the barrel. Its purpose is to provide a heated channel and a leak-proof seal for the plastic to be injected into a cooled mold. There are many different types and configurations of nozzles depending on the specific application. When considering which nozzle to use on an injection molding machine, the following items must be considered: The radius of the nozzle must match the radius of the sprue bushing. The nozzle must be in alignment with the sprue bushing. The nozzle orifice should be slightly smaller than the sprue bushing orifice. The nozzle length should be longer than the sprue bushing depth. The taper is correct for the material being used.



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