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What Are The Factors That Affect Casting?
Jul 12, 2017

What are the factors that affect Casting?
Casting is a process, Casting the use of the form is there are many forms. Casting process in the pressure Casting, metal Casting, ceramic Casting and investment Casting, etc., Casting process is diversified.
Different process requirements require the Casting process is different, the Casting is a process. In real life when the Casting process is selected according to its specific requirements to select the Casting process of the process.
(1) the impact of Casting structure:
A. Casting wall thickness, shrinkage, Casting wall thin, small shrinkage.
B. Free shrinkage rate, hinder the shrinkage rate is small.
(2) the impact of Casting material:
A. The higher the carbon content in the material, the smaller the line shrinkage, the lower the carbon content, the greater the line shrinkage.
B. Common material Casting shrinkage rate is as follows: Casting shrinkage K = (LM-LJ) / LJ × 100%, LM for the cavity size, LJ for the Casting size. K is affected by the following factors: wax mold K1, Casting structure K2, alloy type K3, Casting temperature K4.
(3) the impact of molding on the shrinkage of Castings:
A. The effect of wax temperature, wax pressure and packing time on the size of the melt is the most obvious, and then the pressure of wax is the same. The
B. The linear shrinkage of the wax (mold) material is about 0.9-1.1%.
C. When the mold is stored, shrinkage will be further generated, the shrinkage value of about 10% of the total shrinkage, but when stored for 12 hours, the die size is basically stable.
Casting is a very complex Casting process, Casting Casting and annealing solution, the two processes are mainly to improve the mechanical properties, to obtain a stable size.
Annealing treatment means that the aluminum alloy Casting can be heated to a certain high temperature, the temperature of the temperature after a period of time, and then with the furnace cooling process is called annealing.
Annealing process can eliminate the stress inside the Casting, can stabilize the Casting size, but also to ensure that the Casting less and deformation. This will increase the plasticity of the Castings. This process is very important for the Casting. If you do not have this process, Casting can not be well improved and can not improve the work efficiency.
What are the requirements of the Castings for the performance of the shell?
The basic role of the shell is to obtain a glossy and precise Casting. The following types of shell performance must be required.
1. Have a good process performance, can accurately copy out the shape of the mold to ensure the accuracy of the size. Facial smooth.
2. There is sufficient room temperature and high temperature strength and the necessary stiffness.