Горячая продажа литья под давлением алюминия с горячей камерой

 

Pressure casting, also known as die casting, is a casting method in which molten alloy liquid is poured into the pressure chamber to fill the cavity of a steel mold at high speed, and the alloy liquid solidifies under pressure to form a casting. The main characteristics that differentiate die-casting from other casting methods are high pressure and high speed.

① Liquid metal fills the mold cavity under pressure and crystallizes and solidifies at higher pressures, commonly ranging from 15-100MPa.

② The metal liquid fills the mold cavity at a high speed, usually between {{0}} meters per second, and some can even exceed 80 meters per second (the linear speed of the mold cavity introduced through the inner gate - the inner gate speed). Therefore, the filling time of the metal liquid is extremely short, about 0.01-0.2 seconds (depending on the size of the casting), which can fill the mold cavity.

1.damage

During die-casting production, the mold is repeatedly subjected to the action of cold and heat stimulation, causing deformation on the formed surface and its interior, which leads to repeated cyclic thermal stress. This leads to damage to the organizational structure and loss of toughness, leading to the occurrence and continued propagation of microcracks. Once the crack expands, molten metal is squeezed in, and repeated mechanical stress accelerates the crack propagation. Therefore, on the one hand, the mold must be fully preheated at the beginning of die casting. In addition, during the die-casting production process, the mold must be maintained within a certain operating temperature range to avoid early cracking and failure. At the same time, it is necessary to ensure that there are no internal issues before and during the production of the mold. In actual production, most mold failures are caused by thermal fatigue cracking.

2.fragmentation

3.corrosion

As mentioned earlier, commonly used die-casting alloys include zinc alloy, aluminum alloy, magnesium alloy, and copper alloy, as well as pure aluminum die-casting. Zn, Al, and Mg are relatively active metal elements that have good affinity with mold materials, especially Al which is easy to bite. When the hardness of the mold is high, the corrosion resistance is good, while if there are soft spots on the formed surface, the corrosion resistance is unfavorable.

 

There are many factors that can cause mold failure, including external factors (such as high or low casting temperature, whether the mold is preheated, the amount of water spray coating, whether the tonnage of the die-casting machine matches, high die-casting pressure, too fast inner gate speed, cooling water not being opened synchronously with die-casting production, the type and composition of the casting material Fe, the size and shape of the casting, wall thickness, coating type, etc.). There are also internal factors (such as the metallurgical quality of the mold material, the forging process of the billet, the rationality of the mold structure design, the rationality of the pouring system design, the internal stress generated during the mold machine (electrical processing) processing, the heat treatment process of the mold, including various matching accuracy and smoothness requirements, etc.). If the mold experiences early failure, it is necessary to identify the internal or external causes for future improvement. However, in actual production, corrosion is only a localized part of the mold. For example, areas directly washed by the gate (core, cavity) are prone to corrosion, and areas with soft hardness are prone to aluminum alloy sticking to the mold.

 

 

 

 

	less than US$50,000
	2014
	100 to 149

 

	less than US$50,000
	90 percent to 94 percent

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Tel:+86 15989331617

Whatsapp&Wechat:+86 15989331617

Skype ID:alex.ho43

alex.he@innolead.net

 

 

горячая этикетка : , Ручки из листового металла, Разработка прототипа ЧПУ, Die Casting Simulation, Умные потолочные вентиляторы, Прототип ЧПУ для удобства использования, Умные дома наборы