What is the stainless steel precision casting process?

In daily life, many alloy materials are difficult to process, and the parts have complex shapes that are difficult to manufacture by other methods, especially in the aerospace field. The stainless steel precision casting process, also known as investment casting or silica sol process, is a low-cutting, no-cutting process. Casting process. Due to its wide application, it is not only suitable for different types of alloys, but also suitable for the casting of various alloys. The dimensional accuracy and surface quality of cast products are superior to other casting methods. What is the stainless steel precision casting process? The following is an introduction to the stainless steel precision casting process.


1. Make different molds according to different shapes of products. The molds are divided into upper and lower concave molds, which are made by lathe, planing, milling, corrosion and electric spark. The shape of the pit is consistent with the shape of half of the product. Aluminum alloy materials are mainly used For industrial wax pressing molding, molds with low melting point, low hardness, low requirements, low price and light weight.

2. A large number of industrial wax patterns are made from aluminum alloy molds. The physical model of industrial wax usually only corresponds to one blank product. The margins around the 3 wax patterns have been repaired. After removing the burrs, several individual wax patterns are attached to On the prefabricated wax model head. This wax model is also a solid model made of industrial wax.

3. After applying industrial glue to multiple wax patterns fixed on the mold, evenly spray a layer of fine sand (a kind of refractory sand, silica sand can be widely used at high temperatures). The fine sand particles ensure that the surface of the blank is as smooth as possible.

At the set room temperature (or constant temperature), spraying a layer of fine sand wax mold can dry naturally, but it will not affect the shape change of the internal wax mold. The natural drying time depends on the complexity of the product. Generally speaking, precision casting is dried once The time is about 5-8 hours.

4. After one sandblasting and natural air drying, continue to apply industrial rubber powder (silica sol) on the surface of the wax model, and spray 2 layers of sand, which is coarser than one layer of sand. After 2 sandblastings, the wax model is naturally dried at a certain temperature. Naturally After drying, perform 2 sandblastings, followed by the 3rd, 4th and 5th sandblasting. Requirements: - Adjust the number of sandblasting times according to product surface requirements, size, self-weight and other factors. General sandblasting The number of times is 3-7 times. Each sandblasting is 8 times, and the size of the sand grains is different. Generally, the sand grains in the subsequent process are coarser than the previous process, and the drying time is also different. Generally speaking, it takes about 3-4 times to make sand with full sand wax. sky.