High precision high speed closed-loop control nitrogen auxiliary shooting glue injection molding machine

Abstract

The invention provides a high precision high speed closed-loop control nitrogen auxiliary shooting glue injection molding machine, and belongs to the field of injection molding machines. The injection molding machine can be used for solving the problem that the speed of the injection molding machine is not high and the stability is not good. The injection molding machine provided by the invention comprises an injection oil cylinder, a control unit, a speed sensor, a servo valve and a pressure sensor, wherein the speed sensor outputs a detecting speed signal which is detected to the control unit, and the pressure sensor outputs a detecting oil pressure signal to the control unit; and the control unit can carry out a first time PID(piping and instruments diagram) closed loop computing control according to the deviation of the detecting speed signal and a setting speed signal, and the control unit also can carry out a second time PID closed loop computing control according to the deviation of the detecting oil pressure signal and a setting oil pressure value. The injection molding machine provided by the invention is provided with a two-layer PID computing control, the speed of the injection molding machine can accelerate 300 mm / s in a one millisecond and can simultaneously steady in the speed range of 350-600mm / S so as to carry out high speed injection.

Description

technical field [0001] The invention relates to the technical field of injection molding machines, in particular to a high-precision, high-speed closed-loop control nitrogen-assisted injection molding machine. Background technique [0002] With the rapid development of polymer materials and manufacturing industry, engineering plastics have been widely used in the manufacturing fields of precision instruments, electronic instruments, audio-visual products, medical machinery, communication equipment and optical lenses. The stability and other parameters are required to be high. [0003] The structural schematic diagram of the existing injection molding machine for injection molding such engineering plastics is as follows: figure 1 shown. figure 1 Among them, the existing injection molding machine includes a sol motor 2, an injection cylinder 1 is connected to both sides of the sol motor 2, a screw 3 is arranged between the two injection cylinders 1, one end is connected to t...

AI Technical Summary

Problems solved by technology

[0004] However, the self-weight of the injection motor 2 and the second injection plate 4 is relatively large, and it needs to overcome a large gravity when starting and a large inertial impact when stopping, which directly affects the injection progress and injection efficiency.

At the same time, the poor control of the displacement accuracy of the injection cylinder 1 by the existing injection molding machine also partially affects the accuracy of the injection molding product of the injection molding machine

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