Since the self-hardening resin sand casting has the advantages of good casting surface quality, high dimensional accuracy, low scrap rate, wide application range, and low technical level requirements for workers, it greatly reduces the labor intensity of workers and improves the working environment. Therefore, domestic More and more companies (or enterprises) choose self-hardening resin sand casting methods. Although self-hardening resin sand casting technology has matured, there are still many problems in the production process. In the production process of self-hardening resin sand casting, the following issues need to be noted.
1. Always pay attention to the operation of the equipment. The quality of the equipment directly affects the cost of casting production and the quality of castings. Therefore, in the casting production, we must always pay attention to the operation of the equipment, and find and analyze the abnormal operation in time. Attention should be paid to the following two aspects:
1. Pay attention to the operation of dust removal equipment. The quality of the dust removal equipment directly affects the regeneration cost of the reclaimed sand and the quality of the castings. In casting production, abnormal operation of the dust removal equipment is often difficult to find, but if the dust removal effect of the dust removal equipment is not good, it will not only affect the working environment and pollute the air More importantly, it affects the fine powder content of the reclaimed sand. The direct result is an increase in the amount of resin added during sand mixing and an increase in the rate of scrap casting due to poor permeability.
2. Pay attention to the operation of sand mixing equipment. Whether the sand mixer can operate normally directly affects the quality of the sand mixer, and the amount of liquid material (resin, curing agent) added is the most critical. In general, the amount of resin added is controlled by the voltage of the gear pump motor, and the amount of curing agent is controlled by the voltage of the diaphragm pump motor. Due to the change of seasons and weather, the change of the viscosity of the liquid material is the same. In the case of voltage, the amount of liquid material added will fluctuate, and the curing agent is likely to crystallize, causing valves and pipelines to be blocked. Therefore, the liquid material pipeline should be cleaned every shift, and the amount of liquid material added should be tested weekly. To ensure the accuracy of the amount of liquid material added.