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| Unit Price: | 6 USD |
|---|---|
| Min. Order: | 10 Piece/Pieces |
Model No.: custom
Precision casting is a relatively common casting process in steel casting manufacturers at present, but the current development is not as common as cast iron and steel casting, but precision casting can obtain relatively accurate shape and relatively high casting accuracy.
The more common way for precision casting is to design the product mold according to the drawings. The difference between precision casting and steel casting is that steel casting should have a certain margin for processing, while precision casting can leave a margin or not. With casting way to cast, to obtain the original wax mold, and then in the wax mold above the repeated coating and sand process, such as hardened shell after drying the internal wax mold melting, this step is dewaxing, so as to obtain the cavity; After roasting the shell, the goods can have enough strength and permeability, and then the metal liquid needed is cast into the cavity. After cooling, the shell is removed and sand is removed, so as to obtain high-precision finished products. We then according to the needs of the product to carry out heat treatment or cold processing.
To do the mold according to the requirements of the user's drawings, the mold is divided into up and down the way of a concave die, through milling, car, plane, and other processes to complete, the shape of the mold pit and the product half consistent. Because the wax mold is generally used for industrial wax pressing, we need to choose the hardness is not high, low requirements, cheap, slightly lighter weight, melting point is not high aluminum alloy material as a mold.
After selecting the aluminum alloy material, we can use this aluminum alloy to produce a large number of industrial wax solid models. Under normal circumstances, an industrial wax solid mold can only give a blank product.
When the wax mold is ready, it is necessary to modify the allowance around the wax mold, remove the excess on the surface of the thing to talk about a single wax mold glued to the prepared mold head.
We coated the heads of several wax molds with industrial glue and then evenly sprayed the first layer of fire-resistant silica sand. The sand particles are very small and fine to ensure that the final blank comes out with a smooth surface.
Then put the wax mold in our room temperature factory for natural air drying, but absolutely can not affect the shape change of the internal wax mold, natural single air-drying time depends on the internal complexity of the mold, generally speaking, the first air-drying time is about 5-8 hours.
6, when the wax mold air dry, need to continue on the surface of the wax mold a layer of industrial glue and spray the second layer of sand, the second layer of sand than the first layer of sand particles larger, thicker. After touching the second layer of sand, the same as the first layer, the natural air drying
7. When the second layer of sand is dried naturally, the third layer, the fourth layer, and the fifth layer shall be successively sandblasted.
Sandblasting requirements: we should adjust the number of sandblasting according to the surface requirements of the product and the size of the volume. Under normal circumstances, the number of sandblasting will be about 3-7 times. Each sandblasting particle size is not the same, each process of sand is thicker than the previous one, the length of drying time is not the same. Generally, a complete wax mold sand cycle may be in 3~4 days or so.
We have many years of experience in sheet metal, CNC processing production, has an advanced sheet metal processing production line, equipped with laser cutting, CNC shear, CNC punching, CNC bending, automatic riveting, automatic welding, automatic spraying, tooling, polishing, screen printing, assembly and another large workshop, has all kinds of advanced testing equipment, perfect testing process.
Product Categories : Sheet Metal Fabrication > Sheet Metal Parts
