Precision casting popularizes dewaxing casting
- 2018-12-04-

Precision casting castings are becoming more and more common in our daily life, so how do we advance the quality of precision casting castings?

1,Coffee machine castingsCastings have high dimensional accuracy, which can reach 4-6 levels, 20mm plus or minus 0.13mm, 100mm plus or minus 0.30mm, 200mm plus or minus 0.43mm, and the dimensional accuracy of small parts is not easy to reach plus or minus 0.10mm. The angle tolerance is 0.5-plus or minus 2.0 degrees, and the thinnest wall thickness of the casting can be 0.5mm; the surface roughness is small, about Rmax-12S, which can greatly reduce the machining allowance of the casting and realize no-surplus casting.

2,Lost wax castingThe casting material of the product is not restricted. The material composition of stainless steel, stainless iron, alloy steel and carbon steel can be adjusted as needed to meet the requirements of engineering technology (rust prevention, hardness, surface, mechanical properties, etc.).

3. Precision casting can cast products with complex shapes that cannot be formed by other processing methods.

4. Precision casting has high flexibility and strong adaptability. Precision casting can be applied to both mass production and small batch production, and can be repeated in multiple batches.

Share forward precision casting belowRobot stainless steel accessoriesThe quality method is as follows:

Method 1: Process planning: Strictly control the process. Before closing the box, ensure that the appearance and sand core are at a temperature. Ensure the fluidity of molten steel during pouring. For locals with rough and damaged surfaces, choose Foseco ISOMOL300 alcohol-based powder coating. Burn and bake after brushing to make the surface of the mold smooth.

Method 2: Mold planning: The surface treatment of stainless steel castings starts with the mold first. Clean the surface of the mold, that is, clean the surface with sandpaper and brush with nitro paint. For high-precision castings, choose metal or plastic molds and move on to the mold surface. The finish.

Method 3: Fillet planning: In order to prevent white holes during stainless steel casting, in addition to technical methods, it is necessary to make the wall thickness not too thin. When the wall thickness is more than 15mm, use metal molds to cast the corners of the castings. It is necessary to use rounded corners;

Method 4: Wall thickness planning: Because metal molds dissipate heat quickly, the minimum wall thickness of stainless steel casting should be larger than that of sand casting castings. The minimum wall thickness of various casting alloys and different sizes of castings; Method 5: Polishing planning: In the polishing process, the flash and burrs are removed, and the uneven surface is polished to make it smooth. Regarding the heat-treated castings, the steel shot size is planned to be 0.85~1.4mm, the hardness is HRC40-50, and the maximum hardness error is HRC3.0.

Method 6: Material planning: start with raw materials, use wrong sand resin sand for appearance and core making, mesh number 75-150, use thermosetting resin, mixed sand with high refractoriness, smooth surface, good dispersibility, falling sand simple.