Vacuum die-casting device and high-vacuum die-casting method

Abstract

The invention provides a vacuum die-casting device and a high-vacuum die-casting method. The vacuum die-casting device comprises a die chamber, a punch, dies, ejector rod through holes, an ejector rod and a vacuum generating device, wherein the die chamber defines a liquid containing space internally; the punch is arranged in the die chamber; the dies comprise a movable die and a static die which are oppositely arranged, a mold cavity is defined between the movable die and the static die, and the mold cavity is connected with the liquid containing space; the ejector rod through holes are formed in the movable die; the ejector rod is arranged in the ejector rod through holes in a sleeved mode; and the vacuum generating device is connected with the die chamber, the mold cavity and the ejector rod through holes and is used for forming vacuums in the die chamber, the mold cavity and the ejector rod through holes, and the vacuum generating device and the die chamber are connected through a first vacuum pipeline opening formed in the top end of the punch. According to the vacuum die-casting device, vacuumizing treatment on the punch in the die chamber and the ejector rod through holes in the movable die is added, and therefore the vacuum pressure of the mold cavity which is fully filled can be ensured to be below 5 kPa, the pore content of a casting which is cast by the high-vacuum die-casting can be effectively reduced, and the process requirements of subsequent heat treatment and welding treatment are met.

Description

technical field [0001] The invention relates to the technical field of vacuum die-casting, in particular, the invention relates to vacuum die-casting equipment and a high-vacuum die-casting method. Background technique [0002] At present, die-casting technology is widely used in automobiles, 3C and other fields, and has the advantages of short molding cycle, high production efficiency, and environmental friendliness. However, due to the different stages of low-speed and high-speed movement of the punch in the die-casting process, it is easy to cause the molten metal to move in the press chamber and cavity in a turbulent manner, which can easily cause air entrainment, resulting in pores in the final casting, seriously It affects the mechanical properties of castings, which further makes it difficult to carry out subsequent heat treatment and subsequent welding processes, which limits the application fields of die castings. [0003] Therefore, the equipment and process of di...

AI Technical Summary

Problems solved by technology

However, due to the different stages of low-speed and high-speed movement of the punch in the die-casting process, it is easy to cause the molten metal to move in the press chamber and cavity in a turbulent manner, which can easily cause air entrainment, resulting in pores in the final casting, seriously It affects the mechanical properties of castings, which further makes it difficult to carry out subsequent heat treatment and subsequent welding processes, which limits the application fields of die castings

[0003] Therefore, the equipment and process of die-casting technology at this stage still need to be improved.

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