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Design idea of propeller paint stripping sandblasting machine

2018-07-03

Due to the long-term operation of aircraft propeller under high load, the surface accuracy requirements are very high, so we designed the sandblasting machine to adopt suction dry sandblasting. The suction type dry sand blasting machine is a negative pressure formed in the spray gun by the high-speed movement of air flow with the power of compressed air. The abrasive is sucked into the spray gun through the sand conveying pipe and shot out through the nozzle, and then sprayed on the surface of the processed parts, so as to achieve the expected processing purpose. In the suction dry sand blasting machine, compressed air is not only the power of feeding, but also the power of acceleration.

This method is easy to control, and easy to operate. It is suitable for paint removal of parts requiring less air pressure. After choosing the sandblasting method, we should design the sandblasting machine according to the requirements of the propeller maintenance manual. It is mainly based on the dimensions of propeller parts and the data in the manual to determine the overall dimensions of the sandblasting machine, the dimensions of the working chamber, the compressed air source and other parameters.


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Removing static electricity by sandblasting machine

1. Shanghai sandblasting machine adds an electrostatic ion bar mechanism. The electrostatic ion bar can generate a large number of positive and negative charges, which can neutralize the charges on the object. When the charges on the object surface are negative charges, it will attract the positive charges in the air flow. When the charges on the object surface are positive charges, it will attract the negative charges in the air flow, so that the static electricity on the object surface will be neutralized And, in order to eliminate static electricity, 2 sandblasting machine adds electrostatic plasma air knife, which can produce a large number of air masses with positive and negative charges, which are blown out by compressed air, and can neutralize the charges on the object. When the charge on the surface of the object is negative, it will attract the positive charge in the air flow. When the charge on the surface of the object is positive, it will attract the negative charge in the air flow, so that the static electricity on the surface of the object is neutralized, so as to eliminate the static electricity. The high-speed compressed gas can also blow away the stubborn dust on the object. 3. The material of plastic material is added to the sandblasting machine, and the material of plastic plate can also play a very good role in removing static electricity. The abrasive parts of the sandblasting machine should be made of wear-resistant plastic material as much as possible, which can not only remove static electricity, but also increase the service life of the sandblasting machine

The benefits of the improvement of new abrasives

With the development and progress of the international and domestic precision casting market, customers have put forward higher and more precise requirements for the quality of casting products, especially the development of aviation and gas turbine industry in recent years, which promotes the continuous improvement of the testing requirements for high-quality castings. Some key and important parts made of high temperature master alloy are not allowed to repair welding in the future, which makes a large number of castings scrapped in the process of fluorescent detection of casting surface defects. Under this premise, we invent and use a new type of abrasive; spherical sand blasting method, which can effectively and significantly eliminate the false defects of dispersion point in fluorescence detection while removing the melting model shell by sand blasting, which improves the once through rate of fluorescence inspection, greatly reduces the repair rate, scrap rate, improves the working efficiency and shortens the construction period.

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