Method of molding a part
AssigneeExtrude To Fill, LLC
InventorRichard Ernest Fitzpatrick
Life of this patent
Estimating the term…
Abstract
The present disclosure provides a method of molding a part. The method may include rotating a screw within a barrel to extrude a molten material through a nozzle orifice into a mold cavity to fill the mold cavity with the molten material, stopping rotation of the screw upon the mold cavity being filled with the molten material, monitoring a parameter indicative of a pressure in the mold cavity, and further rotating the screw to extrude additional molten material into the mold cavity when a drop in pressure in the mold cavity is detected.
Claims30
A method of molding a part, comprising:
- rotating a screw within a barrel to extrude a molten material through a nozzle orifice into a mold cavity to fill the mold cavity with the molten material;
- stopping rotation of the screw upon the mold cavity being filled with the molten material;
- monitoring a parameter indicative of a pressure in the mold cavity;
- and
- further rotating the screw to extrude additional molten material into the mold cavity when a drop in pressure in the mold cavity is detected.
A method of molding a part, comprising:
- rotating a screw within a barrel to extrude a molten material through a nozzle orifice into a mold cavity;
- continuing to rotate the screw to fill the mold cavity with the molten material;
- stopping rotation of the screw upon the mold cavity being filled with the molten material;
- and
- after stopping rotation of the screw, further rotating the screw to extrude additional molten material into the mold cavity to maintain a constant pressure in the mold cavity.
A method of molding a part, comprising:
- opening a nozzle orifice;
- rotating a screw within a barrel to extrude a molten material through the nozzle orifice into a mold cavity;
- continuing to rotate the screw to fill the mold cavity with the molten material;
- stopping rotation of the screw upon the mold cavity being filled with the molten material;
- maintaining the nozzle orifice in an open condition after stopping rotation of the screw;
- and
- further rotating the screw to extrude additional molten material into the mold cavity to maintain a constant pressure in the mold cavity.
A method of molding a part, comprising:
- rotating a screw within a barrel to extrude a molten material through a nozzle orifice into a mold cavity;
- continuing to rotate the screw to fill the mold cavity with the molten material;
- stopping rotation of the screw upon the mold cavity being filled with the molten material;
- closing the nozzle orifice after stopping rotation of the screw;
- detecting a loss in pressure in the mold cavity;
- opening the nozzle orifice;
- and
- further rotating the screw to extrude additional molten material into the mold cavity to offset the loss in pressure in the mold cavity.
Dependencies are inferred from the claim text.