Pressurizing closed-loop control system of die-casting machine
A closed-loop control and die-casting machine technology, applied in the direction of fluid pressure actuation system safety, fluid pressure actuation system components, mechanical equipment, etc., can solve problems such as pressure shock, die casting flash, unfavorable long-term use of molds, etc., to achieve Avoid pressure shock and improve quality
Active Publication Date: 2022-03-01
SHENZHEN LEADWELL TECH CO LTD
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Problems solved by technology
The traditional open-loop supercharging control directly applies the pressure in the supercharging accumulator to the injection cylinder. The casting pressure tends to be high first and then low, which is not conducive to the stability of the mechanical properties of the die-casting parts, and it is easy to cause pressure shocks. It is beneficial to the long-term use of the mold, and even causes flashing of the die-casting parts
In addition, when using a booster accumulator to adjust the casting pressure of the injection cylinder, it is necessary to change the nitrogen pressure in the nitrogen cylinder in the booster accumulator, and then adjust the pressure of the hydraulic oil in the rodless cavity of the injection cylinder, but this method cannot Precise and stable control of the pressurization process of the injection cylinder
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[0026] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of example embodiments. communicated to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
[0027] Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus repeated descriptions thereof will be omitted. It should be noted that in the present disclosure, the terms "comprising", "configured with", and "disposed at" are used to express an open and inclusive meaning, and...
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The invention relates to the technical field of die-casting, and provides a die-casting machine pressurization closed-loop control system which comprises a pressurization energy storage device, a pressure sensor, a pressure sensor and a pressure sensor. A pressure storage cavity is formed between one end of the piston and the cylinder body, and a piston rod penetrating through the pressurizing sleeve is arranged at the other end of the piston; a first oil storage cavity is formed between the pressurizing sleeve and the piston; a second oil storage cavity is formed among the piston rod, the pressurizing sleeve and the cylinder body; the hydraulic oil source is connected with the first oil storage cavity and the second oil storage cavity; the injection oil cylinder is connected with the second oil storage cavity, and a first pressure sensor and a second pressure sensor are arranged in the injection oil cylinder; the first valve is arranged between the second oil storage cavity and the injection oil cylinder; the second valve is arranged on an oil discharge pipeline of the first oil storage cavity; and the programmable logic controller is connected with the first valve, the second valve and the pressure sensor, obtains the numerical value of the pressure sensor and adjusts the opening degree of the first valve and the opening degree of the second valve. By means of the system, the casting pressure can be stably increased to the required value within the preset time.
Description
technical field [0001] The invention relates to the technical field of die casting, in particular to a pressurization closed-loop control system of a die casting machine. Background technique [0002] The die-casting machine hydraulically injects metal into the cavity of the mold through the injection cylinder to form die-casting parts. In the process of forming the molten metal, a reaction force will be applied to the injection cylinder. Generally, it is necessary to increase the pressure at the rear end of the injection cylinder during the injection high-speed section (that is, pressurization) to ensure sufficient casting pressure to keep the molten metal at a certain pressure. Lower molding improves the quality of die castings. [0003] With the gradual promotion of large-scale die-casting machines with one-piece molding, there are more and more types of die-casting products with one-piece molding, and the casting structure is becoming more and more complex, which has hi...
Claims
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IPC IPC(8): B22D17/20B22D17/32
CPCF15B13/02F15B3/00F15B21/02F15B20/00B22D17/2015
Inventor刘卓铭刘相尚王隽潘玲玲黎建华
OwnerSHENZHEN LEADWELL TECH CO LTD