The appearance of the casting is not good? The casting manufactur

The products produced by castings have a wide variety of mechanical applications, such as complex shapes, structures, and quality requirements, which all have an impact on the castings themselves. In the production process, most of them are poured, and defects such as cracking, sand sticking, and sand flushing that occur during the pouring process are quite common, which can lead to a deterioration in the appearance quality of the castings. This will increase the workload of finishing, and there will be significant differences in appearance compared to products from other casting manufacturers.

In the process of casting processing, not only should attention be paid to quality issues, but also to the appearance of the product. The following are several reasons why the appearance quality of castings deteriorates:

1. The particle size of molding sand and sand core is coarse, and the compactness is low;

2. Poor selection of coatings and uneven thickness of coatings can cause peeling of the coatings;

3. The pouring temperature is still too high, and the hydraulic pressure is relatively high;

4. The degree of the upper box or sprue cup is too high, and the static pressure of the liquid is too high;

5. Both molding sand and core sand contain a lot of attachments, and have low refractoriness and poor thermal conductivity;

6. The molding sand and core sand contain more recycled sand, and the sintering temperature is low;

7. Late sand removal during unboxing can lead to the formation of solid hot bonded sand, especially for thick castings and high melting point alloy castings;

8. Metal liquids have good fluidity, but low surface tension;

9. Improper handling of the gating system and riser resulted in local overheating;

The casting manufacturers have summarized several reasons for rough appearance of castings for you. When producing products, you can start from these points to prevent them. If you have any related questions, you can call us for consultation, and we are always at your service.