Energy-saving servo hydraulic control system for injection machine and control method thereof

A hydraulic control system and control method technology, applied in the field of injection molding machines, can solve the problems of hydraulic control system cost increase, large power consumption, energy waste, etc., and achieve obvious energy saving effects, cost reduction, and precise control effects
CN101623920AActive Publication Date: 2010-01-13桂林星辰科技股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
桂林星辰科技股份有限公司
Publication Date
2010-01-13

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Abstract

The invention discloses an energy-saving servo hydraulic control system for an injection machine with multi-pump confluence and a control method thereof. The system comprises N branches, and each branch comprises a servo controller, a servo motor, an oil pump and a check valve, and accesses to an injection machine hydraulic loop in a gathering way. A main control template is connected with a host control computer and each servo controller. Each motor is provided with a speed measurement element which is connected with the servo controller thereof, rotational speed feedback signals of a main servo controller access to a control unit, and the hydraulic loop is provided with a pressure sensor. The control method comprises the following steps: a host computer provides flow and pressure set signals according to an injection molding flow; regulating signals of the flow and the pressure are obtained by the system according to a command of the host computer and the rotational speed and pressure feedback signals to solve the amount of starting motors and the rotational speed of the motors; and a plurality of pumps are controlled to cooperatively work to cause total flow of the hydraulic loop to follow the flow set signals and total pressure of the hydraulic loop to follow the pressure set signals. The invention satisfies the requirements of high-power running and low-power running of equipment, has accurate and agile control, and is obvious to save the energy.
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Description

(1) Technical field

[0001] The invention relates to the technical field of injection molding machines, in particular to an energy-saving servo hydraulic control system and a control method for an injection molding machine with multi-pump confluence. (2) Background technology

[0002] The hydraulic system of the injection molding machine includes the motor and the oil pump driven by it. Controlling the speed of the motor can control the speed of the oil pump, and then control the pressure or flow of the hydraulic circuit to achieve the purpose of controlling the various mechanisms of the injection molding machine.

[0003] In the early days, the asynchronous motor was used to directly drive the oil pump, and the hydraulic system of this injection molding machine was difficult to save energy. Finally, a frequency converter is used to control the asynchronous motor. Although there is a certain energy-saving effect, the ordinary asynchronous motor consumes high energy, the respo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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