Die casting: Definition, advantages, disadvantages, various common metal characteristics, and applications.

The estimated reading time for this article is ten minutes.

Die-casting equipment was first invented because people needed to make molds for movable type printing. Then, in 1849, the first small, die-casting-related patents for the production of printing press types were issued. Then, the die-casting process has gradually been applied to various industries. However, Japanese scholars, American scholars, and British scholars have made different definitions of the die-casting process. At present, the industry is familiar with the statement of Japanese scholars, that is, “pressing the molten alloy into the precision casting mold at a high temperature will produce a large amount of casting in a short time. A casting method that produces high precision and excellent surface finish.”

Of course, as a professional foreign trade company engaged in die casting for more than ten years, we have our own opinions in the field of die casting. The following content will explain in detail the basic knowledge of die casting technology, the advantages and disadvantages of die casting technology, and the industry application of die casting technology. , so that people outside the industry who do not understand the die-casting industry can easily understand the knowledge of die-casting.

Definition of Die Casting

Die casting is a casting method in which molten or semi-molten metal is injected into a metal mold at high speed and high pressure, and the molten or semi-molten metal is cooled and formed under pressure, referred to as die casting. Castings produced by die casting are called die castings.

Advantages of die casting

1. Fast production speed and high productivity. The die-casting process utilizes easy-to-implement, high-level automation, and mechanization to rapidly occupy molten or semi-molten metal in the cavity of a steel mold using high speed and high pressure, resulting in a high production rate.

2. The casting has high dimensional accuracy and a smooth surface. The dimensional tolerance level of die castings can reach CT3 – CT6 and the surface roughness is generally Ra 0.8 – 3.2μm. The formed die castings can generally be used directly without machining.

3. Parts can be embedded in die castings, which not only saves valuable materials and machining time, but also replaces the assembly process of components, reduces the assembly process, simplifies the manufacturing process, and also reduces or avoids secondary machining.

4. Castings have high tensile strength. The tensile strength of the casting can reach 415 MPa.

Disadvantages of die casting

1. The casting cost is high. Die-casting machines, die-casting alloy, and die-casting mold are the three major elements of die-casting production, and none of them are indispensable. But usually, because of the high cost of die-casting machines and die-casting molds, die-casting technology is not suitable for producing small-batch die-casting parts, which means that die-casting products usually require a high MOQ, which also means that customers need to pay higher costs.

2. On the one hand, it is limited by the clamping force and mold size of the die-casting machine. On the other hand, the high cost and large investment of the die-casting machine mean that the production of large-scale die-casting parts is limited. In other words, the die casting method is not suitable for the production of large die castings.

3. Under the filling of high speed and high pressure, it is difficult to completely remove the gas in the cavity of the die-casting mold, and the castings are prone to pores, cracks, and oxidized metal impurities. Furthermore, since die casting is to cast molten or semi-molten metal into die castings, this means that die castings usually cannot be subjected to any heat treatment or welding, because the gas in the gap will expand under the action of heat, causing the inside of the die casting. Small defects and even peeling of the surface are produced.

4. The types of casting alloys are easily limited, and only parts made of aluminum, magnesium, zinc, and copper can be processed.

Characteristics of various metals commonly used in die casting:

Aluminum: Lightweight, high dimensional stability when making complex and thin-walled castings, strong corrosion-resistance, good mechanical properties, high thermal and electrical conductivity, and high strength at high temperatures.

Magnesium: Easy to machine, high strength-to-weight ratio, and the lightest of commonly used die-cast metals.

Zinc: The easiest metal to die-cast, economical to manufacture small parts, easy to coat, high compressive strength, high plasticity, and long manufacturing life.

Copper: high hardness, strong corrosion-resistance, the best mechanical properties of commonly used die-casting metals, wear resistance, and strength close to steel.

Die Casting Applications

1. Electronic and electrical accessories. Such as electronic doors, motors, engines, etc.;

2. Industrial accessories. Such as ship parts, fuel pressure regulators, filter parts, etc.;

3. Door and window hardware accessories. Such as door and window hardware commonly used in life, door handles, window handles, door hardware, connectors, knobs, etc.;

4. Auto parts, such as engine block, cylinder head cover, gearbox housing, shell cover, chain cover, etc.;

5. Lampshade accessories. Such as the lampshade of various lamps such as UFO lights, spotlights, airport floor lamps, etc.

For a long time, in terms of die casting, Dewin’s main production direction is die-casting parts in the field of automobiles and motorcycles. With more than ten years of industry accumulation, we have a large number of customer groups and have cooperated with many international well-known automobiles and motorcycles. , mobile phone companies have close cooperative relations. If you are looking for a reliable partner, Dewin with ISO9001 certification will surely satisfy you with professional production capacity.

Inquiry tips: Please send an email to info@dewin.co, or leave your contact information, we will have a professional salesperson get in touch with you.