Heat flow path apparatus for injection molding

Abstract

The invention discloses a hot runner device for injection moulding, comprising a flow distribution plate, a needle valve nozzle part, a valve needle, a piston driving the valve needle and a cylinder, wherein, the flow distribution plate is arranged in a runner in which resins for injection moulding are moved; the needle valve nozzle part makes the resins in the runner to inject into a pouring head of a mould; and the valve needle is used to open and close the pouring head. The hot runner device is characterized in that: a position adjusting mechanism which makes the cylinder to move relative to the flow distribution plate is arranged for adjusting the position of the valve needle; and a nozzle adjusting mechanism which gives adjusting force to the needle valve nozzle part in the section direction of the protruding direction of the flow distribution plate to the needle valve nozzle part is arranged. Through the nozzle adjusting mechanism which lengthwise adjusts the needle valve position and the position adjusting mechanism which transversely adjusts the pouring head position, the device realizes that the mould can adjust the length of the valve needle and the pouring head positionin the mounting state and avoid the formation of a flowed head, and realize assembly and adjustment in use.

Description

A hot runner device for injection molding technical field The invention relates to a mold device for injection molding, in particular to a hot runner device for injection molding. Background technique The hot runner device in the general mold is a device used to inject molten resin into the mold cavity, so it has a flow channel for the high-temperature molten resin to move, and a valve to control (open and close) the resin injection in the flow channel. Molten resin is injected into the mold. In the past, the nozzle was put into the resin injection port of the mold close to the manifold, and the needle valve nozzle was installed on the manifold, and the needle valve nozzle part was heated due to the injection of high-temperature molten resin, and the thermal deformation would cause the center position of the nozzle to change. . Therefore, at the installation site, it is necessary to adjust the center of the nozzle by repeatedly heating the splitter plate and the needle ...

AI Technical Summary

Problems solved by technology

In addition, the movement of the valve needle cannot be controlled by connecting the injection signal, so the valve needle may also move when the injection signal is wrong, causing the problem of material escape.

In the past, air pressure was used to drive the piston movement, and air pressure had the disadvantage of slow response. However, if oil pressure is used to solve this problem, the temperature of the manifold will rise, so only air pressure can be used.

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