Ss 304 casting introduction
Lingtong Casting adopt world-class standard such as ASTM, AISI, GB, DIN, JIS in our casting design and manufacturing. All kinds of mechanical parts modern design superior hot sale Ss 304 casting.We implement ISO9001 quality system in our daily management and manufacturing. Our products are exported to Japan, Holland, Australia and America, the quality of our castings are Widely appreciated in China and abroad market. The frames we produce for Japan WKM, are 100% Magnetic particle inspected with zero defect. Holland Stertil B.V., the world's large car lifting machine manufacturer, have cooperated with us for around 10 years, on main force components of lifting machine.
Model NO.: Customized
Casting Method: Thermal Gravity Casting
Application: Oil and Gas
Surface Roughness: Ra3.2
Certification: CE, ISO 9001:2000
Specification: Class 150lb~2500lb, Size 1/2"~56"
HS Code: 8481804090
Type: Chemical Hardening Sand
Sand Core Type: Resin Sand Core
Machining: CNC Machining
Surface Treatment: Sand Blast
Inspection: International Inspection Report of Each Process
Transport Package: Standard Export Packing
Ss 304 casting principle
1、The so-called investment casting process, simply speaking, it is to use fusible material (such as wax or plastic) to make fusible model (referred to as the melt or model), coated with several layers of special fire-resistant coating, after drying and hardening, to form an integral shell, the model is then melted from the shell with steam or hot water, the shell is then placed in a sand box, filled with dry sand around, and finally the shell is placed in a roaster and subjected to high temperature Roasting (if use high-strength shell, you can directly roasting the shell without model after demolding), After the mold or shell has been fired, the molten metal is cast therein to obtain the castings.
2、Investment casting size accuracy is high, generally up to CT4-6 (sand cast CT10 ~ 13, die-casting CT5 ~ 7), of course, due to the complexity of the investment casting process, there are many factors of effecting casting dimensional accuracy, such as shrinkage of the mould material, the deformation of the mold, the change of the line volume of the shell during heating and cooling, the shrinkage rate of the alloy and the deformation of the casting during the solidification process, etc. Although the dimensional accuracy of the ordinary investment casting is relatively high, Consistency still needs to be improved. (Consistency of castings with medium and high temperature waxes should be much improved.)
3、Molding press, the cavity surface finish with high pressure, therefore, the surface finish of the investment is relatively high. In addition, the shell is made of a refractory coating of high temperature resistance coated on a melt mold, which is formulated with special binders and refractory materials, and has a high degree of surface finish on the surface of the cavity. in direct contact with the molten metal. Therefore, the investment casting surface finish than the average casting high, generally up to Ra.1.6 ~ 3.2μm.