Otto MÃ¤nner GmbH of Bahlingen, Germany, has patented a new nozzle heater for hot runners.
The patented device is a new heater band with a unique clamping mechanism. A stainless steel shell houses three cams in the casing of the inner heater band. The inside of the shell is contoured to match the cam arrangement. A hook-shaped key is used to twist both parts together against each other. When twisted, the cams rise and tighten, creating tension between the heater band and the nozzle.
Otto MÃ¤nner said the design keeps the maximum thermal contact of the heater to the nozzle and eliminates any tolerance difference between the nozzle, the outside and inside diameters, and the heater band.
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