The production of custom-weighted iron has distinct characteristics that are different from other processes. The main features include wide adaptability, the need for a large amount of materials and equipment, and environmental pollution. The production of weighted iron generates dust, harmful gases, and noise, which cause severe environmental pollution compared to other mechanical manufacturing processes. Measures must be taken to control this pollution. The accuracy of the castings and the economic performance of the production process mainly depend on this process. In many modern weighted iron workshops, the molding and core-making have been mechanized or automated. Common sand mold-making and core-making equipment includes high-pressure, medium-pressure, and low-pressure molding machines, sand polishing machines, boxless injection molding machines, core injection machines, cold and hot core box machines, etc. 

After the counterweight castings of the excavator are removed from the self-cast cooling mold, there are gates, risers and metal burrs, and the sand mold counterweight iron castings are still adhered to the sand. Therefore, a cleaning process is necessary. The equipment used for this task includes shot blasting machines, gate and riser cutting machines, etc. The sand casting parting and cleaning process is a labor-intensive procedure, so when choosing the molding method, efforts should be made to create favorable conditions for the parting and cleaning process. 

The counterweights of forklifts are mostly of a monolithic type. When enterprises choose forklifts, they tend to "buy large rather than small". Even if there is a lot of redundant tonnage during use, they won't have the feeling of "wishing the vehicle were smaller when it's in use". However, choosing large-tonnage models will also encounter many problems. The existence of these problems is also clearly seen by many forklift operators, such as increased energy consumption due to excessive counterweight iron, and the vehicle being prone to sinking into soft ground. 

It is precisely because of the existence of these problems that some people proposed the scheme of integrating the counterweight into a modular form. In this way, it would be like building with blocks, allowing the counterweight of the forklift to be changed, thus enabling the selection of the appropriate working counterweight scheme.