A hotrunner assembly for an injection molding apparatus includes a hotrunner manifold, a nozzle for conveying liquid resin from an outlet of the hotrunner manifold, a valve pin linearly movable within and along a longitudinal axis of the nozzle to control flow of the liquid resin from the outlet of the hotrunner manifold, an actuator for driving the valve pin, a primary seal disposed radially between the valve pin and walls of a bore extending through the hotrunner manifold, and a secondary seal located axially between the hotrunner manifold and the actuator and circumscribing a section of the valve pin to prevent gases or liquid resin from contacting the actuator.

An injection molding device and related method includes a mold plate with at least one pocket having at least one discharge opening to discharge melted plastic from the pocket into at least one mold cavity interconnected to the pocket and a nozzle including a housing, which during operation is interconnected to the pocket. Per discharge opening a needle is arranged displaceable in an axial direction in the housing between a closed position and an open position. In the closed position the needle closes the thereto related discharge opening and is thereby preventing melted plastic from flowing from the pocket into the at least one mold cavity. In the open position, the needle releases the discharge opening such that melted plastic flows from the pocket into the at least one mold cavity. Furthermore, a melt channel is discharging into the pocket to supply melted plastic into the pocket.

An injection molding device and related method includes a mold plate with at least one pocket having at least one discharge opening to discharge melted plastic from the pocket into at least one mold cavity interconnected to the pocket and a nozzle including a housing, which during operation is interconnected to the pocket. Per discharge opening a needle is arranged displaceable in an axial direction in the housing between a closed position and an open position. In the closed position the needle closes the thereto related discharge opening and is thereby preventing melted plastic from flowing from the pocket into the at least one mold cavity. In the open position, the needle releases the discharge opening such that melted plastic flows from the pocket into the at least one mold cavity. Furthermore, a melt channel is discharging into the pocket to supply melted plastic into the pocket.

A hotrunner assembly for an injection molding apparatus includes a hotrunner manifold, a nozzle for conveying liquid resin from an outlet of the hotrunner manifold, a valve pin linearly movable within and along a longitudinal axis of the nozzle to control flow of the liquid resin from the outlet of the hotrunner manifold, an actuator for driving the valve pin, a primary seal disposed radially between the valve pin and walls of a bore extending through the hotrunner manifold, and a secondary seal located axially between the hotrunner manifold and the actuator and circumscribing a section of the valve pin to prevent gases or liquid resin from contacting the actuator.