Analyze the advantages of the compressor body using the lost foam casting process

The lost foam casting process is widely used in the casting of various parts because of the advantages of high dimensional accuracy, good surface finish and light casting quality. For the casting of compressor bodies, traditional sand casting has been used in the past. The castings often have defects such as sand holes. After the lost foam casting process is used, the defects of the casting sand holes produced by the reasonable casting system setting, the brushing process and the buried box molding process are basically absent. 

We are specializing in:

1. Sand casting (Grey iron, ductile iron, aluminum,etc.)

2. Investment casting (carbon steel, stainless steel, alloy steel,etc.)

3. Die casting(aluminum, zinc, etc.)

4. CNC Machining(CNC Center, CNC lathe, lathe, drilling machine, milling machine, pressing machine, etc.)

Certificate: ISO9001:2015, TS16949

The investment casting can be used in auto parts, engine spare parts, agricultural machinery parts, etc.
In the production of a compressor body made of HT250, the casting requires pressure testing, so castings are required to have casting defects such as slag inclusions, shrinkage, and pores that affect the compactness of the structure. Sand casting process including aluminum sand casting, cast iron sand casting.This product used to be produced by resin sand casting. In the days when resin prices continue to rise, the cost of resin sand casting parts is significantly higher. The lost foam casting process has the following advantages:
(1) Elimination of sand mixing and core making process, eliminating the cumbersome operation of binning, demoulding, trimming, lower core and combined box in traditional modeling, greatly simplifying the falling sand, casting cleaning and sand processing, thus Shortened the production cycle;
(2) On the one hand, due to the high rigidity of the mold under negative pressure, the cast iron piece is easy to realize self-feeding, thereby reducing the size of the riser required for the casting; on the other hand, due to the large degree of freedom of assembly of the foam model cluster, it is easy to realize one. The multi-piece casting molding improves the process yield.
(3) High precision of castings: The castings have high dimensional accuracy, which is very close to the castings produced by the die-casting process, up to CT7; the weight accuracy is MT7; the surface is very smooth and smooth, and the surface roughness is Ra12.5 um.
(4) The machining allowance of the casting is small, and the machining allowance can be reduced to 1.5-2.0 mm according to the technical requirements of the casting.
(5) It provides sufficient freedom for the structural design of the casting, which causes a profound change in the design of mechanical parts, and can realize the production of castings with complex shapes and internal cavities.
(6) Labor productivity is increased, production personnel are reduced, and the required personnel are significantly less than traditional wet sand casting.