Hot runner system for injection molding
AssigneePlastic Engineering & Technical Services, Inc.
InventorsPatrick A. Tooman, Bruce Casey
Life of this patent
Estimating the term…
Abstract
An improved hot runner system is provided. The hot runner system includes a hot drop having an inlet for receiving molten material, the inlet diverging into first and second channels that converge at a feeder tube for providing an even distribution of molten material in a mold cavity. The hot runner system further includes a valve pin adapted to reciprocate within the feeder tube for opening and closing the valve gate, the valve pin being moveable in response to activation of first and second linear actuators disposed exterior to the hot drop. The linear actuators are moveable in unison with each other and are joined to the valve pin via a cross-bar that extends through an interior portion of the hot drop between the first and second channels.
Claims20
A hot runner system comprising:
- a hot drop having an inlet for receiving molten material, the inlet diverging into first and second channels;
- first and second linear actuators coupled to a cross-bar, the cross-bar extending through the hot drop in a region between the first and second channels;
- and
- a valve pin fixedly coupled to the first and second linear actuators and adapted to reciprocate within the hot drop for opening a valve gate, wherein the first and second channels converge at a feeder tube encompassing the valve pin.
A hot runner system comprising:
- a hot drop having an inlet for receiving molten material from an injection unit;
- a valve pin adapted to reciprocate within the hot drop for opening a valve gate;
- and
- first and second linear actuators mechanically coupled to the valve pin to raise and lower the valve pin within the hot drop, wherein the hot drop defines first and second channels that diverge from the inlet, extend parallel to the valve pin, and converge at a feeder tube encompassing the valve pin for directing the molten material to the valve gate.
A hot runner system comprising:
- a hot drop having an inlet for receiving molten material, the inlet diverging into first and second channels, the first and second channels converging distal from the inlet;
- first and second linear actuators coupled to a cross-bar, the cross-bar extending through the hot drop in a direction orthogonal to the first and second channels;
- and
- a valve pin fixedly coupled to the first and second linear actuators and extending through a feeder tube in fluid communication with the first and second channels, the valve pin being adapted to reciprocate within the hot drop for opening a valve gate.
Dependencies are inferred from the claim text.