Common problems in lost wax casting mainly include wax mold defects and operational difficulties.
Wax mold defects
Insufficient filling: slow wax injection speed, low wax or die temperature, improper nozzle position, too small wax injection channel and other factors will cause the wax to cool quickly during the flow, so that the corners and edges or the thin-walled parts of the wax mold are not filled properly, and rounded corners appear at the edges.
Surface depression and shrinkage: Insufficient injection pressure and time, high wax temperature, insufficient cooling time or too much release agent will cause surface depression and shrinkage of the wax mold.
Deformation: Improper mold removal or wax pattern removal, too short wax injection pressure holding time, too high wax and mold temperature, improper storage and other reasons will cause the wax mold to deform.
Bubbles: Surface bubbles and internal bubbles are common defects. Surface bubbles are usually visible to the naked eye, while internal bubbles are found by local bulging, which is caused by gas expansion in the wax mold.
Wrinkles: Wrinkles will appear on the surface of the wax mold due to reasons such as low wax temperature, low shooting speed, or damaged or unclean inner surface of the mold.
Operation Difficulties
Wax mold making: The core of lost wax casting lies in the production and assembly of wax molds. The fineness of the wax mold and the stability of the assembly directly affect the final quality of the casting. During the production process, it is necessary to fully consider factors such as the characteristics of the metal material, the shape and size requirements of the casting to ensure the accuracy and reliability of the wax mold.
Melting wax demolding: During the high-temperature heating process, it is necessary to control the temperature and time to avoid excessive melting or oxidation of the wax material, and at the same time ensure that the mold can shrink evenly to avoid stress cracks.
Of course, if you choose a professional foundry to cooperate, you can avoid the above problems, because professional casting companies do a good job in craftsmanship, precision and quality inspection, and can ensure that the products delivered to customers are complete and flawless customized products. This is the case with Mulan Metal, which has 12 years of metal casting experience and is good at various metal casting processes. With complete certificates, the cooperative customers are spread across more than 30 countries and regions.
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