Full-closed-loop high-precision high-energy-saving injection molding machine control system

Abstract

The invention discloses a full-closed-loop high-precision high-energy-saving injection molding machine control system, which comprises a glue injection electronic ruler, a mold closing electronic ruler, an ejection electronic ruler, a melt glue proximity switch, an injection molding machine controller, a servo power source driver and a servo power source, wherein the glue injection electronic ruler, the mold closing electronic ruler, the ejection electronic ruler and the melt glue proximity switch are all connected with an injection molding machine; the glue injection electronic ruler, the mold closing electronic ruler and the ejection electronic ruler can detect and feed back the position and the speed of the injection molding machine mechanism in real time, the melt glue proximity switchcan detect and feed back the rotating speed of a melt glue screw in real time, and all the units form a hardware part of the full-closed-loop high-precision high-energy-saving injection molding machine control system. According to the invention, a full-closed-loop control system is adopted, and the control precision of the injection molding system is greatly improved. The adoption of the full-closed-loop control system realizes high energy conservation and reduces the economic cost of actual production; and the intelligent, unmanned and highly-automatic flexible systematization of a modern industrial automatic production line is met.

Description

technical field [0001] The invention relates to the technical field of injection molding control systems, in particular to a fully closed-loop high-precision, high-energy-saving injection molding machine control system. Background technique [0002] Injection molding machine control system For a long time in the past, servo valve is usually used to realize closed-loop control of injection molding machine action. The control principle is that, through the real-time feedback of the spool displacement of the servo valve (such as the clamping servo valve), the position of the servo servo core is dynamically adjusted, so that the spool of the servo valve tends to a certain stable position, so as to ensure the safety of the servo valve. The output flow is constant. [0003] According to the formula: Q=Cd×W×Xv×SQR(ΔP / ρ) [0004] where Q is the flow rate, Cd is the flow coefficient, W is the area gradient of the spool, Xv is the displacement of the spool, SQR is the square root, Δ...

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Problems solved by technology

[0006] However, in actual production, the oil temperature is constantly changing, and the leakage of valves, cylinders and hydraulic pipelines is also greater than zero. This closed-loop control is affected by the oil temperature and leakage in practical applications; due to this Servo control replaces the displacement of the control mechanism by controlling the displacement of the spool, and obtains a higher precision of the displacement of the mechanism from the displacement accuracy of the control spool. It is an indirect control and inevitably has limitations.

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