1. Casting batch: the larger the batch, the more impressive the economic benefits.

2. Clean out: there is no chemical binder in the molding sand, foam is harmless to the environment at low temperature, and the recovery rate of old sand is more than 95%.

3. High casting accuracy: Cast iron is a new process with nearly no margin and forming, which does not require taking mold, no parting surface, no sand core, so the casting has no flash, burr and die inclination, and reduces the dimensional error caused by the core combination.

4. The cast iron process, like other forging processes, has its shortcomings and limitations, not all castings are suitable for the use of the lost mold process to produce, to be analyzed in detail.

5. Casting structure: The more complex the casting structure is, the more it can reflect the superiority and economic benefits of the cast iron process. For the case of narrow internal cavity channels and interlayers on the structure, it is necessary to improve the predecessor before using the lost mold process.

6. Reduce investment and production costs, reduce the weight of casting blanks, and small machining allowance. Highly complex castings can be forged from a combination of foam dies.

7. Casting material: the order of good and bad suitability is roughly: gray cast iron -- non-ferrous alloy -- ordinary carbon steel -- ductile cast iron -- low carbon steel and alloy steel; Through the necessary preparation to not cause the process experiment, debugging period is too long.

8. Casting size: mainly consider the use of the corresponding equipment (such as shaking table, sand box).