Good lubrication on surface of mould is a key factor ensuring die casting and improving product quality. We have developed an inner-spraying-coating technology to resolve partial undesirable lubrication in the mould. The practical production verifies that the soldering and tearing defects in the product can be greatly reduced by employing the inner-spraying-coating method

and the defect rate is less than 0.9%. Meanwhile

stability of mass-production and efficiency are improved.