environment as the enterprise consumption habits, accumulated experience is not the same, should be based on the environment of the department to think about what goods are suitable to do and what goods are not suitable to do.The new shock-type or shock-compression molding machine consumption line consumption rate is not high enough, workers rest intensity, noise, did not comply with the request of a small amount of consumption, should be gradually innovated.

Normally speaking, in terms of medium and heavy castings, cast iron can be consumed by resin self-hardening sand mold, and cast steel can be consumed by electric glass sand mold. Castings that are accurate in size and bright in name can be sold at a higher profit.The secondary reason is that compared with other methods of smelting sand smelting profit is low, consumption process is easy, consumption cycle is short.

Precision casting intermediate batch heavy castings can be thought of using resin self - hardening sand molding and coring.The secondary reason is that the sand smelting method compared to other smelting method profit is low, consumption process is easy, health.Accordingly, want to accomplish much, fast, good, save, should plan as a whole to arrive each limits.Can use sodium silicate sand mold, VRH method sodium silicate sand mold, inorganic ester sodium silicate self-hardening sand mold, clay dry mold, resin self-hardening sand mold and lime sand mold;For large castings with single piece consumption, adopting pit molding method has low profit and fast production.To coordinate the precision requirements of casting and profit good decent is the consumption of heavy tool bed and other castings, the normal adoption of core modeling method, no manufacturing features and sand box, is in the pit core;But in addition the workshop adopts the sand box modelling method, produces the appearance.The weight of the castings produced by the wet moulding of clay ranges from 10kg to 10kg, while the dry moulding of clay consumes up to 10t of castings.

Similar to sand smelting, a small amount of consumption of the workshop should be innovative environment to adopt conservative modeling skills, core-making methods.When the wet mold does not meet the requirements, then consider using the clay sand table dry sand mold, dry sand mold or other sand mold.

According to statistics, 60 ~ 70% of castings are consumed by sand molds, and 70% of inner and outer castings are consumed by clay sand molds.

Smelting method should consume in bulk phase to be sure, sand mold casting precision of smelting consumption, in the name of brightness, the density of material and metallographic organization, such as machine functions are frequently much broader than those of poor, because when casting the department function request higher, should adopt other smelting method, similar to casting (lost wax) smelting smelting, casting, high pressure and so on.

The precision casting method shall be suitable for high-pressure smelting, die-casting, centrifugal smelting and other smelting methods in the factory environment. Due to the high price of facilities and last, it is only suitable for mass consumption.The smelting method selected shall be used to stop the preliminary profit budget so as to confirm the smelting method with high economic benefits and guarantee the casting requirements.There is no difference in the precision of castings, the initial investment and consumption rate, and the final economic benefit.

Precision casting single small batch consumption of large castings, fine molding is still the main way, fine molding can comply with the simple request of all nationalities more sensitive than the request of a lot of process equipment.Because such as the bus starter valve body, valve cover, crankshaft and other castings are wet clay sand process consumption.As for medium sized castings, the consumption lines and solid moulding lines of the box-less low-pressure moulding machine that can adopt the degree of moulding or vertical moulding have a high consumption rate and account for a small proportion of the sky area;As for the middle part, we can choose the consumption line and air impact molding line of all kinds of low-pressure box molding machines to comply with the request of fast and high precision molding consumption line. We can choose the core making method: cold core box, hot core box, shell core and other efficient core making methods.Bulk consumption or temporary consumption of goods shaped by the adoption of multi-box modeling, split box modeling method is suitable for comparison, although the last, sand box and other beginning of high capital investment, but from the waste of molding days, progress goods quality range lost to make up for.