Injection molding machine microinjection device capable of realizing high-speed and high-precision injection

Abstract

The invention relates to an injection molding machine microinjection device capable of realizing high-speed and high-precision injection. The device can be divided into five parts, namely a plasticization unit, an injection unit, a charging unit, an injection platform moving unit and other units; the plasticization unit adopts screw plasticization and is driven by a servo motor so as to improve the plasticization quality and the plasticization precision; the injection unit adopts plunger injection and is driven by a hydraulic cylinder equipped with an energy storage device so as to improve the injection precision and the injection speed. According to a plasticization and non-return transmission device of an injection device, a connecting passage between a plasticization cavity and an injection cavity can be blocked and opened intermittently, and the existence of a one-way valve is prevented, so that a flow passage between the plasticization cavity and the injection cavity is free of dead angle, and the melt retention can be effectively reduced; meanwhile, the system is provided with a testing device capable of detecting abraded quantity of a screw head, thus providing guarantee for overhaul and normal use of an injection molding machine.

Description

technical field [0001] The invention relates to a micro-injection device capable of realizing high-speed and high-precision injection molding, belonging to the application field of injection molding machines, in particular to a micro-injection device of an injection molding machine capable of realizing high-speed and high-precision injection. Background technique [0002] At present, the existing precision injection molding machines and micro-injection molding machines basically use reciprocating screw injection systems and screw plunger injection systems, and their driving methods include electric, hydraulic and electro-hydraulic composite. The electric plasticizing precision and injection precision are high, but the injection pressure is low and the cost is high; the hydraulic injection pressure is high and the cost is low, but the injection precision is low, polluting and noisy; the electro-hydraulic composite plasticizing quality is good, the injection precision is high, ...

AI Technical Summary

Problems solved by technology

The electric plasticizing precision and injection precision are high, but the injection pressure is low and the cost is high; the hydraulic injection pressure is high and the cost is low, but the injection precision is low, polluting and noisy; the electro-hydraulic composite plasticizing quality is good, the injection precision is high, High injection pressure but complex structure

[0003] From the spatial arrangement of the injection unit and the plasticizing unit of the existing two-stage injection molding machine, it can be seen that for a small micro-injection molding machine, the angle between the axis of the plasticizing unit and the axis of the injection unit can be designed to be slightly larger, so that it can It does not affect the overall height of the machine and reduces the overall length of the machine, but for medium-sized microstructure injection molding machines, the angle between the axis of the plasticizing unit and the axis of the injection unit is too large, which will lead to the overall size of the injection molding machine being too high, resulting in its Poor stability and inconvenient operation

[0004] The screw plunger type injection molding machine has the advantages of the plunger type and the screw reciprocating injection molding machine. Since the plasticizing screw has no check ring, it can greatly improve the plasticizing quality and plasticizing efficiency of the material while reducing the stagnant material. The plunger The material leakage during injection is small and has the advantages of high-precision injection. However, in order to block the connection channel between the injection cavity and the plasticizing cavity during injection, a check valve is added to the traditional screw plunger injection molding machine. The existence of the check valve It not only affects the flow of molten material but also increases the possibility of material stagnation, which is not conducive to the injection molding of plastic products with high requirements on light transmission

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