Automatic accurate weighing device for powdery material

Abstract

The invention discloses a powdery material accurate weighing device, which comprises a raw material tank and a weighing cup. The invention is characterized in that the feeding process is operated under vacuum, a high-level switch and a low-level switch are disposed above a vacuum intake tank, an auger conveying mechanism is disposed below the vacuum intake tank, the spiral pitch has two classes, the motor speed has two classes, a optical fiber grating pressure sensor is disposed below a weighing bunker, an automatic reverse turning bed is disposed in the weighing bunker, the signal from a material level switch and the optical fiber grating pressure sensor is transmitted to PLC, and the PLC outputs control signal to a motor of a vacuum pump, vacuum air passages and material control valves. The invention remarkably improves the weighing accuracy from above plus or minus 10 g error of the existing automatic weighing to within plus or minus 1 g error, even lower. It has the advantages of whole sealing operation under vacuum condition, no dust pollution, improved operating environment, accurate weighing, and good consistency. The invention is helpful for further improving the production quality of friction wafer product; and has high spreading and application values, and good market prospect.

Description

technical field [0001] The invention relates to an automatic weighing device for powder materials. Background technique [0002] Weighing devices for powdery materials are widely used, such as weighing devices for grain, chemical fertilizers, chemical dyes, and medicines, which have certain accuracy requirements. However, the weighing requirements for friction materials in the production of automobile brake pads are higher, because brake pads are used to ensure the safety of automobiles. If there is a problem with the quality of the important parts, it will lead to accidents, which will seriously endanger the lives and property safety of the people. One of the key factors affecting the quality of brake pads is the accuracy of the friction material weighing device in the production of brake pads, and the weighing quality must be consistent and accurate. Inaccurate and inconsistent weighing will lead to differences in the molding of the friction lining after molding, resultin...

AI Technical Summary

Problems solved by technology

The powder material weighing device generally has the shortcomings of insufficient detection accuracy, coupled with vibration interference during the operation of the device, inaccurate measurement, inconsistent ingredients, etc., it is difficult to ensure the further improvement of the quality of the friction plate products produced

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