Valve actuated injection molding apparatus
AssigneeDynisco Hotrunners, Inc.
InventorsPaul M. Swenson, Christopher W. Lee
Life of this patent
Estimating the term…
Abstract
A valve gated injection molding system to facilitate improved melt flow to the gate of the nozzle. The system includes an annular flow insert through which the valve pin passes. The annular flow insert includes an annular groove on its outer surface. The edge of the annular groove is spaced from the wall of the melt channel so that some of the melt can flow longitudinally between the edge of the groove and the wall, while the remainder of the melt flows in the groove. The flow direction initiated by the annular flow insert eliminates flow separation and dead spots about the valve pin. The system also includes an actuator assembly including a sled attached to the valve pin.
Claims20
An injection molding apparatus, comprising:
- a nozzle body having a melt channel extending therethrough and terminating at a nozzle gate;
- a valve pin for interrupting melt-flow at the nozzle gate;
- and
- an actuator coupled to the valve pin for causing longitudinal displacement of the valve pin;
- the actuator including:
- a sled coupled to the valve pin that is slidably movable in the longitudinal direction relative to the nozzle body;
- a first pin coupled to the sled;
- and
- an arm fixedly engaged to the first pin of the sled so that rotation of the arm causes longitudinal displacement of the first pin and sled.
An injection molding apparatus, comprising:
- a nozzle body having a melt channel extending therethrough and terminating at a nozzle gate;
- a valve pin for interrupting melt-flow at the nozzle gate;
- and
- an actuator including:
- a sled having a first pin coupled thereto;
- means for mounting the valve pin to the sled so that the valve pin moves with the sled between open and closed positions of the valve pin;
- means for slideably supporting the sled at the nozzle body and in a position of movement toward and away from the gate wherein movement of the first pin toward and away from the gate causes movement of the sled toward and away from the gate;
- an actuator member;
- an actuator arm intercoupled between the actuator member at a first end and only to the first pin at a second end, said arm responsive to the operation of the actuator member;
- and
- means for pivotally supporting the actuator arm at a pivot point so that as the actuator member is operated, the actuator arm pivots and the sled slides.
An injection molding apparatus, comprising:
- a nozzle body having a melt channel extending therethrough and terminating at a nozzle gate;
- a valve pin for interrupting melt-flow at the nozzle gate;
- and
- an actuator coupled to the valve pin for causing longitudinal displacement of the valve pin;
- the actuator including:
- a sled coupled to the valve pin that is slidably movable in the longitudinal direction relative to the nozzle body;
- a first pin removably coupled to the sled;
- and
- an arm fixedly engaged at one end with the first pin of the sled so that rotation of the arm causes longitudinal displacement of the first pin and sled.
An injection molding apparatus, comprising:
- a nozzle body having a melt channel extending therethrough and terminating at a nozzle gate;
- a valve pin for interrupting melt-flow at the nozzle gate;
- and
- an actuator coupled to the valve pin for causing longitudinal displacement of the valve pin;
- the actuator including:
- a sled coupled to the valve pin that is slidably movable in the longitudinal direction relative to the nozzle body;
- a first pin rotatably coupled to the sled;
- and
- an arm fixedly engaged at one end with the first pin of the sled so that rotation of the arm causes longitudinal displacement of the first pin and sled.
Dependencies are inferred from the claim text.