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US 6,604,933 B1Granted
Universal nozzle tip for injection molding
OwnerSamuel Lee Kerninventor
Life of this patent
Estimating the term…
Abstract
An injection molding nozzle tip has a particular arrangement of geometries that allow a sharp Δt point to be effected at a transition section between a heat sink area (adjacent to an external mold) and a heated reservoir that contains molten resin. The high temperature differential at the Δt point is effective to remove stringing and drooling for a wide range of materials and nozzle sizes.
Claims13
An injection molding nozzle tip removably attached to a nozzle of a plasticating barrel and arranged to conduct molten resin to a separate external mold, said nozzle tip comprising:
- (a) a heated melt reservoir arranged to contain molten resin;
- (b) a heat sink section abutting said external mold;
- and,
- (c) a transition section arranged between said reservoir section and said heat sink section, wherein characteristics of said melt reservoir, said heat sink section and said transition section are configured to place a Δt point at a location in said transition section to effect a temperature differential between said melt reservoir and said heat sink section whereby stringing and drooling are eliminated.
1 more element
Dependencies are inferred from the claim text.