Back to results
US 2014/0275443 A1Published application
Shut off nozzle system and methods for making and using the same
AssigneeSabic Innovative Plastics IP B.V.
InventorsUlrich Hofmann, Richard Schouwenaar
Life of this patent
Estimating the term…
Abstract
In one embodiment, a tool, comprising: a tool stationary portion comprising a nozzle and a film gate; and a tool movable portion comprising a shut off pin opposite the nozzle and the film gate; wherein the shut off pin prevents polymer melt in the nozzle from leaking into a cavity of the tool after injection of polymer into the tool.
Claims16
A tool, comprising:
- a tool stationary portion comprising a nozzle and a film gate;
- and
- a tool movable portion comprising a shut off pin opposite the nozzle and the film gate;
- wherein the shut off pin prevents polymer melt in the nozzle from leaking into a cavity of the tool after injection of polymer into the tool.
1 more element
A tool, comprising:
- a tool first portion comprising a nozzle through which polymer melt flows laminarly;
- and
- a tool second portion comprising a shut off pin;
- wherein the tool first portion and the tool second portion form a cavity when the tool is closed;
- and
- wherein the shut off pin is configured to move to block the nozzle after injection of polymer melt into the cavity.
3 more elements
A method of making a shaped part, comprising:
- closing a tool comprising a tool stationary portion comprising a nozzle and a film gate and a tool movable portion comprising a shut off pin opposite the nozzle and the film gate;
- injecting polymer melt into a cavity of the tool, wherein the polymer melt flows through the nozzle;
- sealing the nozzle by moving the shut off pin in the direction of the nozzle;
- completing a compression stroke;
- releasing the shut off pin;
- pushing the shut off pin in the opposite direction of the nozzle;
- opening the tool;
- ejecting the shaped part;
- and
- pulling leftover material from the nozzle with the shut off pin.
7 more elements
Dependencies are inferred from the claim text.