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For investment casting, the casting is not large, When the casting is in the process of mechanical projectile, the more the steel pills, the better. From the working condition of the shot blasting machine, the incidence Angle of the crawler shot blasting machine is the same, while the steel shots of the hook shot blasting machine are two relative incident angles. Such a single incidence angle, how can it get rid of the shell and exfoliation of the casting surface.
One is that the casting in the machine is constantly rolling and turning, two is the steel shot is thrown out at high speed through the shot blasting machine, due to the principle of acceleration and inertia, the steel shot produce a great impact on the casting, bearing the same impact and bounce, therefore, the surface of the castings hit by different angle.
As the casting structure is different, the method of shot blasting is different. Generally speaking, the large pieces select hook machine, and the small pieces choose caterpillar, castings with deep holes, deep grooves choose hook machine, and castings with short sharp corners and few branches choose crawler shot blasting machine.