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Disadvantages of dry sand blasting

2019-06-06

Sand blasting is a key process in the process of die machining, which is driven by compressed air to form a high-speed jet of abrasive solid particles through the spray gun and spray them to the surface of the workpiece at high speed. It changes the surface cleanliness, roughness, mechanical properties and technological characteristics of the workpiece through abrasive impact and cutting. At present, dry sand blasting is widely used for pretreatment, but there are many shortcomings of dry sand blasting: serious dust pollution, harm to human health, easy to attach dust on the surface of workpiece, unable to be directly arranged in the production line, separate and independent sand blasting device increases the production efficiency of the rotating link. In order to solve the above problems, a wet sand blasting device is designed, which can significantly improve the surface roughness and stress distribution of the workpiece, effectively eliminate the dust pollution of dry sand blasting, and can be directly installed in the production line, improve the production efficiency, convenient operation and application economy, which is conducive to the process upgrading and technological innovation of the enterprise, and has high application and promotion value.

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What are the functions of sandblasting machine

(1) The sand blasting machine can remove all the dirt on the surface of the workpiece, such as the rust on the surface of the workpiece, and establish a very important basic schema (usually called rough surface) on the surface of the workpiece. Moreover, the abrasive with different particle size can be changed to achieve different roughness, which greatly improves the binding force of the workpiece, coating and plating material. Or make the bonding parts more firm and better quality.

(2) Cleaning and polishing of rough surface of castings and forgings and workpieces after heat treatment sand blasting machine can clean all dirt (such as oxide skin, oil stain and other residues) on the surface of castings and forgings and workpieces after heat treatment, and polish the surface of workpieces to improve the smoothness of workpieces, thus beautifying the workpieces. Sandblasting machine can make the workpiece show uniform metal color, make the workpiece appearance more beautiful, and achieve the function of beautifying decoration. (3) The function of deburring and surface beautifying of machined parts is to clean the tiny deburring on the surface of workpieces, make the surface of workpieces more flat, eliminate the harm of deburring and improve the grade of workpieces.

And the sandblasting machine can make a small fillet at the junction of the workpiece surface, making the workpiece more beautiful and more precise. (4) To improve the mechanical properties of mechanical parts after sandblasting, Kunshan sandblasting machine can produce even and fine concave convex surface (basic schema) on the surface of parts, so that the lubricating oil can be stored, so that the lubricating conditions can be improved, and the noise can be reduced to improve the service life of machinery. (5) Polishing function 1. Polishing various workpiece surfaces to make the workpiece surface more beautiful.

2. Make the workpiece smooth and non reflective. For some special purpose workpieces, sandblasting machine can realize different reflection or matte at will. Such as stainless steel workpieces, wood furniture surface Matt, frosted glass surface pattern, as well as the surface of the fabric wool processing.

How does the manual sandblasting machine work?

Manual sandblasting machine is the best large-scale sandblasting machine in the use of valves, which can sandblast steel shot, steel sand and other materials. The sand valve is opened by pressure control. When the pressure signal control port is used, the plunger valve is driven to dry from the beach, and the sand valve is opened. By adjusting the position of the opening adjusting cap, the valve can control the sand and flow sand, and open the valve to adjust the sand free level. In the production of sand and sand contact valve rod and valve sleeve with tungsten carbide, the sand blasting machine improves the service life of the sand valve 。 The press in the dry sand impactor is the working pressure formed by compressed air and compressed air in the pressure tank. The abrasive is pressed into the sand conveying pipe through the sand unloading valve, ejected through the nozzle, and then sprayed on the machining surface to achieve the required machining goal. In the dry sand mill, compressed air is not only the feed power, but also the jet acceleration. Even if the sandblasting machine is inflated, the manual sandblasting machine will not open. The sand blasting and sandblasting workers use the electric control switch to control the signal (compressed air) to the air inlet valve and the normally closed grinding valve. The force of the spring is compressed in the compressed air under the action of the abrasive valve. The flow regulating pipe is opened and the blasting operation begins. When the gas signal disappears, the strong spring immediately closes the grinding valve and the abrasive is cut off. The abrasive regulating valve can adjust the abrasive flow when required by sand blasting operation.



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