What Is Squeeze Casting?

In order to obtain the structural shape of the part, the casting mold is made of other easy-to-mold materials in advance, and then the mold is placed in the sand mold, so a cavity with the same size as the component structure is formed in the sand mold. Then, a fluid is poured into the cavity, and after the liquid is cooled and solidified, a part having the same shape and structure as the mold can be formed. The casting mold is an important part of the casting process.

The casting mold refers to the mold used to form the casting in the casting forming process. The casting molds are supporting the casting process, mainly including gravity casting molds, high-pressure casting molds (die-casting molds), low-pressure casting molds, and extrusion casting molds. Casting mold is one of the most important process equipment in casting production, which has a great impact on the quality of castings. The improvement of casting mold technology will be of great significance to improve the quality of castings, develop new castings, and improve the level of near-net processing. Advances in casting mold technology will provide more sophisticated, complex and high-quality castings for national pillar industries such as automobiles, electric power, ships, rail transportation, and aerospace, and promote the overall level of China's manufacturing industry.

With the rapid development of automobiles, motorcycles, aerospace and other industries, casting molds are growing rapidly at a rate of more than 25% each year, and casting mold technology has made great progress. 2. Complex die-casting molds mainly rely on imports. China's automobile and motorcycle industries have entered a period of rapid growth, and output has increased significantly for many consecutive years. It can be predicted that in the next 10 to 20 years, the production of China's foundry molds will continue to grow rapidly, mainly from the automotive industry. In the context of energy saving and emission reduction, the increase in the gravity casting molds of ferrous metals will slow down, while aluminum-magnesium alloy die-casting molds, low-pressure casting molds, and extrusion casting molds will increase significantly ^[1]

The development of China's foundry mold industry has gone through a difficult process, and remained in a backward state until 1976. Since 1977, due to the vigorous development of China's machinery, electronics, light industry, instrumentation, transportation and other industrial sectors, the demand for casting molds is increasing, the quality requirements are getting higher and the delivery period is getting shorter. . Therefore, the relevant departments of our country have paid great attention to the foundry mold industry. The molds have been listed as key scientific research projects in the Sixth Five-Year Plan and Seventh Five-Year Plan. National standards for molds. Through this series of measures, the casting mold industry has made great progress, and some breakthroughs have been made in certain technologies.

In order to shorten the molding cycle and improve market competitiveness, mold companies use

After years of continuous development, China's casting mold industry has made great progress, but there are still many problems in its development. It is understood that these problems mainly include: weak independent innovation capability, backward equipment and technology, lack of core competitiveness of enterprise groups and internationally renowned brands, and small scale of foundry mold companies.

Casting molds are sold to users for service. The casting molds must flow into the hands of downstream users and must be marketable. As the industrialization progresses, the development of the industry is used to predict. In the future, the following six aspects will be Is the development direction of the casting mold industry.

The first is for

Domestic and foreign companies have used a variety of cleaning methods in core box cleaning:

a. Use chemical cleaning agents to clean.

b. Use dry-ball spray method to clean the core disk.

c. Blast cleaning with liquid or solid blasting machine.

Using a liquid blasting machine, the compressed air pressure is preferably 0.5 to 0.7 MPa, and the spray distance is preferably about 10 to 120 mm. The cleaning medium should be 90um glass pellets or 0.125mm white corundum sand to clean and maintain the core box. In general, the core box is regularly cleaned and maintained for 1-2. For cores with resin scale on the surface, The cleaning time of the box depends on the size of the core box, the thickness of the scale, and the complexity of the shape. Usually, the scale of the core box can be removed within 5-20min, and the spray time has an impact on the dimensional accuracy and surface roughness of the core box. There is almost no impact. The process of cleaning the core box with a liquid blasting machine and glass shots can basically clean up the thick resin scale on the surface of the core box, but it is difficult to remove the thick grooves that have not been cleaned for a long time.