Prospects for development
China’s economy is maintaining the momentum of high-speed development. Due to the increasing contradiction between resources and environment, according to the requirements of the scientific outlook on development, circular economy and clean production have become an important national policy for the sustainable development of social economy. Experts point out that the die casting category, which includes low-pressure casting and extrusion casting and other non-ferrous metal casting molding processes under various pressures, has a total output of about 1.5 million tons.
It is understood that the total production of automobiles reached 7.28 million, a year-on-year growth of 27.6%, among which the production of cars 3.87 million, a year-on-year growth of 39.7%. In 2012, the total output of die-casting parts in China was 1,024,000 tons, including 802,140 tons of aluminum die-casting parts and 13,620 tons of magnesium die-casting parts. From January to October 2012, the national production of cars was 3,850,100, with a year-on-year increase of 23.4%; 3.601 million units were sold, up 22.0% year on year.
The die casting market will continue to grow rapidly. Die-casting non-ferrous metal resources can be recycled and die-casting less cutting technology advanced, especially to meet the requirements of circular economy and clean production, in line with the national economic development general policy. Automotive lightweight, but also accelerated the development of aluminum magnesium die casting market; It is an inevitable tendency for the center of gravity of international non-ferrous metal die casting production to shift to China, and the development of the die casting market is huge.
The increasing demand for aluminum alloy die casting promotes the development of die casting industry
The automobile industry is one of the most important customers of the domestic die casting industry. With the development of the domestic economy and the improvement of people’s living standards, the sales of domestic cars rose sharply, which to a large extent promoted the development of the domestic die casting industry, especially the aluminum alloy die casting industry. With the increasing voice of domestic automobile lightweight, the optimization and upgrading of the automobile industry are gradually implemented, and the gray iron castings are gradually replaced by aluminum castings, which stimulates the rising demand for aluminum alloy die castings. In addition, with the rapid development of the global die casting industry, the demand for aluminum alloy die casting in all walks of life is also increasing, the development prospect of die casting industry is very broad.
The quality of
It is very important to control the surface temperature of die casting mold for producing high quality die casting. The uneven or improper mold temperature will also lead to the instability of casting size, resulting in the deformation of ejection casting in the production process, resulting in thermal pressure, sticky mold, surface depression, shrinkage hole and hot bubble and other defects. When the mold temperature difference is large, the variables in the production cycle, such as filling time, cooling time and spraying time, will have different degrees of influence.
In 2012, the total output of die castings was 1,024,000 tons, including 802,140 tons of aluminum die castings and 13,620 tons of magnesium die castings.
Part of the die casting is not formed and the cavity is not sufficient
Causes: 1. The die casting mold temperature is too low; 2. Low temperature of liquid metal; 3, the press pressure is too small; 4. Insufficient liquid metal; The injection velocity is too high; 5, air can not be discharged.
Adjustment method: 1-2, raise die casting mold, metal liquid temperature; 3. Replace the high pressure die casting machine; 4. Add enough liquid metal to reduce the injection speed and increase the thickness of the feed port.