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US 4,285,660 AGranted
Nozzle for a plastics injection molding machine, an extruder orifice, or a hot-chamber tool
AssigneeEwikon Entwicklung und Konstruktion GmbH & Co. Kommanditgesellschaft
InventorWalter Mueller
Life of this patent
Estimating the term…
Abstract
A nozzle for use in injection molding machines and the like is disclosed which heats the plastic melt maximally in the region of the injection zone. This is accomplished by a unique heating element which has a large surface area in this region. The nozzle is so designed as to create a suitable temperature gradient by interaction between cooperating flanges around the injection orifice and the element.
Claims32
A nozzle for use in plastic injection moulding machines, extruder orifices, hot chamber tools and the like, comprising:
- a hollow forwardly elongated body with an interior bounded by an interior surface, a forward end in which at least one orifice is located, the orifice communicating with the interior of the body;
- and a single unitary elongated resistance heating element located within the interior and having an enlarged pointed head adjacent to and projecting in part out of said at least one orifice, the head being so shaped as to have a maximal surface area with the point adjacent said at least one orifice.
Dependencies are inferred from the claim text.