Energy-saving control system of injection machine

Abstract

The invention provides an energy-saving control system of an injection machine, comprising a servo motor, a pressure sensor, a D / A (Digital / Analog) converter and a controller. The pressure sensor is electrically connected with the D / A converter which is electrically connected with the controller; and the controller is electrically connected with the servo motor and controls the servo motor to actuate. The control system also comprises an internal engaged gear pump, and the pressure sensor is arranged at the oil outlet of the internal engaged gear pump and used for detecting the pressure of liquid output by the internal engaged gear pump and conveying a detected signal to the D / A converter which converts the detected analog signal into a digital signal and transmits the digital signal to the controller. The internal engaged gear pump has the advantages of simple and compact structure, low working abrasion and smaller ripple and noise, and especially has low requirement on the cleanness of oil liquid without regularly checking or filtering the oil liquid, thereby greatly reducing unnecessary working hour waste of workers.

Description

technical field [0001] The invention relates to an energy-saving control system for an injection molding machine. Background technique [0002] Injection molding machine industry is an industry closely related to national production and life, ranging from automobiles and moulds, to household appliances, toys, mobile phones, etc., are inseparable from injection molding processing. Injection molding machines are the main production equipment in the plastics industry. Injection molding machine is a special plastic molding machine. It uses the thermoplasticity of plastic. After heating and melting, high pressure is applied to make it flow into the mold cavity quickly. After a period of pressure maintaining and cooling, it becomes plastic products of various shapes. The process of an injection molding machine is generally divided into six stages: clamping, injection, melting, pressure holding, cooling, mold opening, and ejection, which are cycled in sequence. Each stage requires ...

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Problems solved by technology

However, first, since the double-volume plunger pump supplies oil through the reciprocating movement of the plunger, during the flow switching process, there is a breakpoint on the pressure supply due to the discontinuity of the oil pressure, and when the oil pressure is injected The moment when the breakpoint occurs affects the accuracy of product quality; second, due to the precise production of the plunger, the quality of the oil is high, and the liquid containing suspended solids cannot be transported; third, due to the complex mechanical structure of the plunger pump, the moving body Many, so the noise is the largest of all pumps

[0005] In addition, if the movement coordination of various mechanisms in the injection molding machine system is not stable enough, especially if the transmission between the servo motor and the double-volume plunger pump is not stable and smooth, it will increase the wear of the transmission mechanism between the servo motor and the double-volume plunger pump and thus cause unnecessary energy loss

If timely maintenance is not carried out, the energy consumption of the injection molding machine system will be increased; if real-time maintenance is carried out, labor costs will inevitably be increased

And when the injection molding machine system is working, the servo motor will generate vibration. If the vibration is not well controlled, it will also increase wear and tear, thereby increasing the energy consumption and operating cost of the injection molding machine system.

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