How to clean the surface of stainless steel investment casting?

Generally speaking, the surface removal of stainless steel investment casting accessories can be divided into two categories: dry and wet. The dry method is mainly shot blasting, while the wet method is a bit of hydraulic press sand removal, water sand removal, etc. The dry method is a friction treatment method with shot blasting as the main body to clean the surface of stainless steel castings. In short, shot blasting is driven by air compression, Let the shot wheel burst to the surface of stainless steel casting at a certain speed to eliminate the sand and zinc dust on the surface. However, this friction removal method has been selected by many manufacturers and almost eliminated because of its low efficiency, uneven removal, poor effect and other factors.

The wet logic method is mainly based on the basic principle of the utility of the rotary oil cylinder. The high pressure pulse counter is charged and discharged in two colors according to the unique electrical level placed in the water, resulting in greater hydraulic transmission impact. Because the elastic modulus and vibration frequency of the adhesive on the surface of the stainless steel investment casting are different from those of the casting itself, so as to achieve the goal of sand removal. For stainless steel castings with complicated appearance, such as shallow holes, embedded holes and inner walls, it has a relatively effective removal effect. It is the most widely used surface cleaning method for a series of castings including stainless steel castings.

The above are two common cleaning methods for the surface of stainless steel investment casting process. Here, we should remind you that these cleaning methods are not only for stainless steel castings, but also for most metal castings. They are an indispensable process for metal castings, The main function is to remove the sand and zinc ash on the surface of the metal material castings and a series of residues, so as to promote the stainless steel casting surface to have more and more stainless steel process glossiness, and achieve the product implementation standard of new products. Therefore, the surface removal of stainless steel castings is very important. We must follow the correct method when removing the stainless steel casting surface. Only in this way can the quality of stainless steel castings be guaranteed.