Hot tip bushing means for a synthetic resin injection molding machine
OwnerShigeru Tsutsumiinventor
Life of this patent
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Abstract
This invention relates to hot tip bushing means for a synthetic resin injection molding machine, which can reduce the pressure loss at the injection molding time and determine the position of a heating tip easily and accurately. To attain this purpose, a straight resin flow passage is formed axially in a cylindrical body of the hot tip bushing means and the fused resin passing through the straight resin flow passage is heated by an outer heater. Further, a cylindrical body of the hot tip bushing means which is near the heating tip is fit to a mold sprue, thereby the position of the heating tip is determined easily and accurately.
Claims5
Hot tip bushing means for a synthetic resin injection molding machine comprising:
- a cylindrical body of heat conductive material;
- a heating tip of heat conductive material provided with first heating means inside of said tip secured on the front of said cylindrical body and having a pointed end;
- a straight resin flow passage formed axially in the interior of said cylindrical body and communicating with a side portion of said heating tip;
- second heating means provided inside adjacent the periphery of said cylindrical body for heating resin passing through said straight flow passage;
- and
- means on said cylindrical body near said heating tip for sealably positioning said tip in a mold sprue.
Dependencies are inferred from the claim text.