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Wax pattern making is very important in the process of lost wax casting process.The quality of wax pattern will have directl influence on lost wax castings.Below are the introduction of common defects and solutions for wax pattern when making.
Investment castings are easy to be deformed during production process.We can divide the deformation into self micro-deformation,flaring deformation and warping deformation.
Green sand casting is a common sand casting process using green sand as the molding material.Green sand does not mean sand in green cloor,but is a kind of wet quartz sand in the sense that it is used in a wet environment.
Sand blasting and matter finishing are all widely used surface treatment processes for investment castings. They will be applied according to different requirements.
3D printers have been into some companies even families.3D printing is a kind of rapid prototyping technology, which is based on three dimensional digital model file.It use adhesive materials such as metal or plastic powder to construct objects by means of step by step printing technology.
Regarding internal defects of investment castings,commom NDT(none defects testing) methods are RT(radiographic testing) and UT(ultrasonic testing).
