Hot runner valve needle driving device

Abstract

The invention discloses a hot runner valve needle driving device, the device comprises a mounting base, a transmission mechanism, a driving mechanism and a dragging block, and the transmission mechanism is rotatably arranged on the mounting base; the driving mechanism is arranged at one side, close to the mounting base, of the transmission mechanism, and an output shaft of the driving mechanism isconnected with the transmission mechanism and used for driving the transmission mechanism to perform reciprocating motion; the dragging block is connected with the transmission mechanism, one end, far away from the transmission mechanism, of the dragging block is provided with a plurality of mounting positions for mounting a valve needle, and the mounting positions are on the same side of the transmission mechanism with the driving mechanism; and the transmission mechanism, under driving of the driving mechanism, is used for driving the dragging block to perform reciprocating rectilinear motion. With the hot runner valve needle driving device provided by the technical scheme of the invention, height accumulation of the driving mechanism and the valve needle in a direction from the transmission mechanism to the driving mechanism is reduced, and thus, overall height of a hot runner system in such direction is reduced; and the driving mechanism drives the transmission mechanism to move,the transmission mechanism further drives the dragging block to move, thus, the valve needle on the dragging block is driven to move, and a structure is simple.

Description

technical field [0001] The invention relates to the field of injection molding, in particular to a hot runner valve needle driving device. Background technique [0002] The injection molding of tiny products in the medical packaging industry has a huge output. However, due to the limitation of multi-cavity arrangement or space, in most cases, only cold runner or hot runner can be used for production. When cold runner is used for production, it will cause A lot of raw materials are wasted and cannot be recycled and reused; when hot runner is used for production, raw materials can be saved, so the method of hot runner production is developing rapidly. [0003] In the prior art, when the hot runner is used for production, the cylinder is used to directly drive the valve needle to move up and down, so that the valve needle protruding into the upper runner of the hot nozzle closes or opens the runner, but the cylinder will increase the overall height of the hot runner system. C...

AI Technical Summary

Problems solved by technology

[0002] The injection molding of tiny products in the medical packaging industry has a huge output, but due to the limitation of multi-cavity arrangement or space, in most cases, only cold runner or hot runner can be used for production. When cold runner is used for production, it will cause A lot of raw materials are wasted and cannot be recycled and reused; when using hot runner production, raw materials can be saved, so the method of hot runner production is developing rapidly

[0003] In the prior art, when the hot runner is used for production, the cylinder directly drives the valve needle to move up and down, so that the valve needle extending into the upper runner of the hot nozzle closes or opens the runner, but the cylinder will increase the overall height of the hot runner system

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