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Electro-hydraulic proportional control system of injection molding machine and design method thereof

A technology of proportional control and electro-hydraulic ratio, which is applied in the electro-hydraulic proportional control system of injection molding machine and its design field, can solve problems such as difficult to meet control requirements and general injection molding effect, achieve good injection molding effect and improve control performance

Inactive Publication Date: 2016-11-09
GUANGXI UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be found that the injection molding effect is very general, and it is difficult to meet the control requirements under high-speed conditions

Method used

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  • Electro-hydraulic proportional control system of injection molding machine and design method thereof
  • Electro-hydraulic proportional control system of injection molding machine and design method thereof
  • Electro-hydraulic proportional control system of injection molding machine and design method thereof

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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present invention.

[0026] like figure 1 The electro-hydraulic proportional control system of an injection molding machine shown includes a servo motor 6, a quantitative pump 5, a pressure sensor 4, an electro-hydraulic proportional valve 3, a hydraulic cylinder 1 and an injection mold 2,

[0027] The electro-hydraulic proportional valve 3 is installed on the hydraulic cylinder 1 and connected with the quantitative pump 5 and the pressure sensor 4 , the servo motor 6 is connected with the quantitative pump 5 , and the controller 7 communicates with the servo motor 6 and the pressure sensor 4 .

[0028] The electro-hydraulic proportional valve 3 includes an electro-hydraulic proportional directional valve and an electro-hydraulic propor...

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Abstract

The invention discloses an electro-hydraulic proportional control system of an injection molding machine. The electro-hydraulic proportional control system comprises a servo motor, a metering pump, a pressure sensor, an electro-hydraulic proportional valve, a hydraulic oil cylinder and an injection mold. The electro-hydraulic proportional valve is installed on the hydraulic oil cylinder and connected with the metering pump and the pressure sensor. The servo motor is connected with the metering pump. A controller is in communication connection with the servo motor and the pressure sensor. The electro-hydraulic proportional control system of the injection molding machine can improve the control performance of the system in a high-speed state substantially, and a good injection effect is achieved.

Description

technical field [0001] The invention relates to the technical field of injection molding machine equipment manufacturing, in particular to an electro-hydraulic proportional control system of an injection molding machine and a design method thereof. Background technique [0002] Under the premise of good material melting performance and low injection speed (generally below 30m / s), general injection molding machines can achieve the required injection speed and mold precision through PID control and setting of empirical values. The performance drops and the injection speed of the injection molding machine increases, such as above 500 m / s. The traditional feedback control cannot provide the required PID control parameters, or the simple classic PID feedback control is no longer suitable for the injection molding control system. Of course, in recent years, many experts have made many improvements to this kind of feedback control. For example, some scholars have proposed to use pr...

Claims

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Application Information

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IPC IPC(8): B29C45/76
CPCB29C45/76
Inventor 李炜黄力梁德坚罗永有
Owner GUANGXI UNIVERSITY OF TECHNOLOGY
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