Views: 2 Author: Site Editor Publish Time: 2020-12-18 Origin: Site
Die casting is a metal casting process characterized by forcing molten metal under high pressure into the cavity. The mold cavity is made using two hardened tool steel molds that have been processed into a certain shape and work in a similar way to injection molds in the process. Most die castings are made of non-ferrous metals, especially zinc, copper, aluminum, magnesium, lead, tin and tin-based alloys. Depending on the type of metal being cast, hot or cold room machines are used.
Casting equipment and metal molds represent significant capital costs, and this tends to limit the process to mass production. The manufacture of parts using die casting is relatively simple, involving only four main steps, thereby keeping the incremental cost of each product low. It is especially suitable for a large number of small and medium-sized castings. Therefore, die casting can produce more castings than any other casting process. Die castings are characterized by very good surface finish (according to casting standards) and size consistency.
The following knowledge points are listed below:
(2) Application of aluminum alloy die casting parts
Cast aluminum alloys can produce cost-effective products due to their low melting point, although they generally have lower tensile strength than wrought alloys. The most important cast aluminum alloy system is Al-Si, where a high content of silicon (4.0% to 13%) helps provide good casting characteristics. Aluminum alloys are widely used in engineering structures and components that require light weight or corrosion resistance. It has very good surface finish (according to casting standards) and size consistency.
Aluminum die-casting alloys are light in weight and have high dimensional stability for complex part geometries and thin walls. Aluminum has good corrosion resistance and mechanical properties, as well as high thermal and electrical conductivity, making it a good alloy for die casting. Low-density aluminum metal is vital to the die casting industry. The aluminum die-casting process still has long-lasting strength at very high temperatures, so cold room machines are required. The molten metal is still contained in the open containment tank, which is placed in the furnace and melted to the desired temperature in the furnace. The open heat preservation pot is placed separately from the die-casting machine, and the molten metal leaks from the heat preservation pot every time it is cast, because these high temperatures will damage the normal pumping system.
The popularity of aluminum alloys has expanded to many applications around the world today, mainly because of the unique features of aluminum (such as light weight) that have won a competitive market share. Corrosion resistance, high electrical conductivity and thermal conductivity, high stability and high tensile strength for complex shapes. The transportation industry is the largest end-use sector in the industry. Increasingly stringent emission regulations by government regulatory agencies and consumer demand for more fuel-efficient cars are gradually becoming a necessary condition for aluminum castings. An example of increased operations in the industry includes replacing steel components in vehicles with lightweight high-quality aluminum to improve fuel efficiency.
Another industry with demand for aluminum alloy die castings includes the construction industry in developing economies, especially the Asia-Pacific region. Aluminum die castings are related to the creation of products, including windows, cladding, curtain walls, prefab buildings, store partitions and accessories. Moreover, aluminum die-casting products are also used in aerospace operations or aircraft around the world. As aircraft sizes and population proportions continue to grow, the aerospace industry hopes to produce higher-density and higher-quality products for these airframe components at a lower cost.
The industries that show the growth trend of die casting machines in the next few years include electric vehicles, renewable energy and lighting and other new technologies are constantly changing the metal die casting industry, especially in precision aluminum alloy die casting. Today, the metal casting industry is innovative, high-tech, challenging, clean and safe.