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Needle Valve Nozzle Assembly

The present invention relates to a manifold unit for supplying casting material in an injection moulding system for processing thermoplastic polymers via a hot runner system with at least one needle valve nozzle which can be sealed by a shut-off needle. In this case, the shut-off needle can be moved by a hydraulic or pneumatic drive system. The needle valve nozzle has a first longitudinal axis and the drive system, which has a piston, has a second longitudinal axis, the first longitudinal axis being arranged parallel to and laterally offset from the second longitudinal axis. A manifold unit for supplying casting material in an injection moulding system for processing thermoplastic materials via a hot runner system comprising at least one needle valve nozzle adapted to be sealed by a shut-off needle, wherein the shut-off needle can be moved by a hydraulic, electric, mechanical or pneumatic drive system, and wherein the needle valve nozzle has a first longitudinal axis, wherein the drive system, which has a piston, has a second longitudinal axis, and wherein the first longitudinal axis is arranged parallel to and laterally offset from the second longitudinal axis. The core of the invention is to provide a manifold unit for supplying sprue material in an injection moulding system for processing thermoplastic materials via a hot runner system, which manifold unit has at least one needle valve nozzle which can be sealed by a shut-off needle. In this case, the shut-off needle can be moved by a hydraulic, mechanical, electric or pneumatic drive system. The needle valve nozzle has a first longitudinal axis and the drive system, which has at least one piston, has a second longitudinal axis, the first longitudinal axis being arranged parallel to and laterally offset from the second longitudinal axis. In other words, the manifold unit according to the invention allows the drive system of a needle valve nozzle not to be arranged coaxially with the longitudinal axis and after the nozzle; instead, the drive system is arranged parallel and offset next to the needle valve nozzle, for example respectively next to a hot runner manifold block of the manifold unit. The longitudinal axis of the drive system is thus not aligned with the longitudinal axis of the needle valve nozzles. In conventional hot runner systems, the drive system, i.e. the drive piston or the cylinder or the guide pillar, is arranged coaxially with the nozzle. The coaxial arrangement of, for example, two nozzles pointing in two opposite directions then causes a further two drive systems, i.e. two pistons or cylinders, also to be arranged coaxially between the two nozzles. The construction resulting therefrom is very wide or has a large overall depth. The positioning in accordance with the invention of the drive next to the nozzle allows a coaxial arrangement of two nozzles with a minimum installation depth.

                                                                                                    Shanghai Remy Valve Manufacturing Co., Ltd

2012-01-05 03:35

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