Sand casting may encounter the following problems in practice, and the corresponding solutions:
1. Sand mold rupture or deformation: sand mold may be affected by high temperature and thermal stress during pouring, resulting in rupture or deformation. Solutions include the use of high-strength sand materials, additional overburden or support structures to improve the heat resistance of the sand.
2. Pores and defects: in the process of sand casting, because the gas is difficult to escape from the sand, it may lead to pores or internal defects on the surface of the casting. Solutions include optimizing the sand formulation, improving the design of the casting system, and adding air holes to promote the smooth escape of gas and reduce the occurrence of defects.
3. Casting size is not accurate: sand casting, due to the shrinkage and deformation of the casting, may lead to casting size is not accurate. The solution includes controlling the shrinkage rate of sand mold by adjusting the mold size and reasonable shrinkage compensation to ensure that the final casting reaches the required design size.
4. Heavy industry and high scrap rate: Due to the limited service life of sand mold, heavy industry and repair may be required, resulting in a high scrap rate in the production process. Solutions include optimizing sand mold design, using sand mold materials with better heat resistance, strengthening sand mold maintenance, etc., to extend the service life of sand mold and reduce the waste rate.
The future trend of sand casting industry may include the following aspects:
1. Automation and intelligence: with the continuous progress of science and technology, sand casting will introduce more automation and intelligent technology to improve production efficiency and quality.
2. Environmental protection and energy saving: reduce the waste and energy consumption in the process of sand preparation, and promote the development of sand casting industry towards the direction of environmental protection and energy saving.
3. High quality and high precision: by optimizing sand molding materials and processes, the quality and precision of castings are constantly improved to meet the higher market demand for products.
4. Rapid manufacturing and customization: introduce rapid prototyping technology and customized manufacturing to shorten the production cycle and provide personalized product solutions.
5. Material innovation and application expansion: explore the application of new materials in sand casting, and open up broader market prospects.
The above is only one of the possible development directions of sand casting industry in the future. With the continuous development of technology and the change of market demand, the sand casting industry has more development potential and opportunities.
Post time: Nov-06-2023