Pressure resistant drop tip nozzle for injection molding

A pressure resistant drop tip nozzle assembly for an injection molding machine comprising:

• a nozzle body having a nozzle passage extending axially through said nozzle body between a nozzle inlet and a nozzle outlet;
• a drop tip having a body connected to said nozzle outlet of said nozzle body and having a drop tip bore extending between a drop inlet located adjacent said nozzle outlet body and a drop outlet;
• an internal heating insert positioned within said drop tip bore;
• a tapered drop passage within said internal heating and located above said drop inlet for defining a resin flow aperture leading to said drop inlet;
• a mechanical connection between said drop tip body and said nozzle body;
• and
• a reinforcing weld between said drop tip body and said nozzle body.

A method of assembling a pressure resistant drop tip assembly for an injection molding machine comprising the steps of:

• providing a nozzle body having a nozzle passage extending axially through said nozzle body between a nozzle inlet and a nozzle outlet, a drop tip having a body and including a drop tip bore extending between a drop inlet and a drop outlet, a tapered drop passage located above the drop inlet for defining a resin flow aperture leading to said drop inlet, drop tip threads formed on the outer surface of the drop tip and nozzle body threads formed on an inner surface of the nozzle body further comprising the steps of:
• connecting the drop tip to the nozzle body by rotating said drop tip so that said drop tip threads located on said drop tip engage and mate with the nozzle body threads located on said nozzle body;
• positioning a laser welding device at the connection point between the nozzle body and the drop tip;
• and
• welding the drop tip to the nozzle body using the laser welding device and creating one or more weld points between the nozzle body and the drop tip.