Process difference between blasting machine and shot blasting industry

Process difference between blasting machine and shot blasting industry

1. Small air-driven or electric rust removal. Mainly powered by electricity or compressed air, it is equipped with appropriate descaling devices to carry out reciprocating or rotating movements to meet the requirements of derusting in various occasions. Such as angle grinder, wire brush, pneumatic needle beam rust remover, air-operated rust hammer, tooth type rotary rust remover, etc., it belongs to semi-mechanized equipment, the tool is light and the maneuverability is large, it can remove rust completely , Old coating, etc., can be used to roughen the coating, the efficiency is greatly improved than manual rust removal, up to 1 ~ 2m2 / h, but can not remove oxide scale, the surface roughness is small, can not achieve high-quality surface treatment quality , The ergonomics are lower than the spray treatment. It can be used in any part, especially widely used in ship repairing process.

2. Shot blasting (sand) derusting. It is mainly composed of particle jet erosion to achieve surface cleaning and suitable roughness. The equipment includes open shot blasting (sand) descaling machine, closed shot blasting (sand chamber) and vacuum shot blasting (sand) machine. The open-type shot blasting (sand) machine is widely used, can completely remove all impurities on the metal surface, such as oxide scale, rust and old paint film, high rust removal efficiency 4 ~ 5m2 / h, high mechanical degree, rust removal quality it is good. But because the abrasives are generally not recyclable, it has an impact on other operations, and it is troublesome to clean up the site. Therefore, environmental pollution is relatively heavy, and its use has been gradually restricted recently.

3. High-pressure water abrasive derusting. The impact of high-pressure water jets (plus the grinding action of abrasives) and water skid are used to destroy the corrosion and the adhesion of the coating to the steel plate. It is characterized by no dust pollution, no damage to the steel plate, greatly improving the efficiency of rust removal, which can reach more than 15m2 / h, and the quality of rust removal is good. However, the steel plate after derusting is easy to return to rust, and it is necessary to apply a special wet derusting coating, which has a great influence on the general performance coating.