The wall thickness of the copper casting will change with the shape of the copper casting, which is usually called stagger box, stagger edge and deviation from the core. There are many reasons for this achievement, such as poor matching of the mold, damage of the locating pin sleeve, mold moving on the copper casting, etc., and deviation in other parts of the mold, template or mud box; It may also be that the sand box is unsuitable; The mud core is deformed during production, baking and transportation; Before pouring, due to negligence, the sand box moved, resulting in the mold to be poured

In order to prevent the thickness of copper castings, the stainless steel casting manufacturer shall, on the one hand, immediately repair the damage of the mold and sand box to tilt the copper castings; Whether the locating pin and locating pin are moved or damaged, and whether the locating pin and pin hole on the sand box and template are worn or deformed shall be checked

In addition, stainless steel casting manufacturers also need to strictly enforce the clearance between mold cores. During formwork forming, positioning pins shall be used to ensure the appearance contradiction of high and low box copper castings; If necessary, tenons can be used to avoid tilting; Clay core is not supported by clay core

The deformation of copper castings is caused by calcination stress, and the appearance of copper castings does not match the specifications and models. The reasons are complex. The temperature difference is also large. As the beam is adjacent from top to bottom, the thickness of the beam not only decreases due to temperature drop, but also shrinks and decreases due to shrinkage and thinning. On the contrary, thin collapse decreases, resulting in more thin and thick collapse than thick and thin collapse