Although shot blasting and sandblasting can play the purpose of cleaning and decontamination, but shot blasting can have a strengthening effect on the workpiece, sandblasting is not obvious sand and steel shot are for casting grinding rust, surface treatment; Steel shot is round, steel sand has edges and corners; Steel sand is broken by steel shot, with the different size of the steel shot, steel sand also has size model; For different castings, the product model is also different, depending on the piece; The hardness of the steel sand is moderate, with excellent anti-elasticity, and the casting is clean.
The best way to clean the casting is to mix the steel shot and steel sand, so that the steel sand can be thrown to the corner part, the steel shot is thrown flat surface, so as to avoid the surface of the casting is not smooth. Mixed use will be much better than a single use of a shot blasting machine abrasive effect.
However, this method is not suitable for every product, the specific depends on the workpiece, and ultimately want to achieve the effect of shot blasting.