Die-casting die vacuumizing structure with vacuum valve connected with exhaust plates in parallel

Abstract

The invention discloses a die-casting die vacuumizing structure with a vacuum valve connected with exhaust plates in parallel. The die-casting die vacuumizing structure comprises the vacuum valve (2), an exhaust block (3), a vacuumizing controlling machine (4) and a vacuumizing pipe; one end of the vacuum valve (2) is connected with the vacuumizing controlling machine (4), one end of the exhaust block (3) is connected with the vacuumizing controlling machine (4), and the other end of the vacuum valve (2) and the other end of the exhaust block (3) are connected with a cavity of a die; and the exhaust block (3) comprises the first exhaust plate (301) and the second exhaust plate (305), wherein tooth tops and tooth roots of the first exhaust plate (301) and the second exhaust plate (305) are arranged in a staggered mode, and accordingly, a zigzag and narrow channel is formed. According to the die-casting die vacuumizing structure, the vacuum valve and the exhaust plates are organically combined, and thus, the defect that pores are formed in a die-casting die due to the fact that a vacuumizing valve is closed too early can be well overcome.

Description

technical field [0001] The embodiments of the present invention belong to the technical field of die-casting mold processing, and more specifically, relate to a vacuum-pumping structure of a die-casting mold in which a vacuum valve and an exhaust plate are connected in parallel. Background technique [0002] Die casting is a special casting method with less cutting and no cutting that develops rapidly in modern metal processing technology. It is a process in which molten metal is filled into a mold under high pressure and high speed, and crystallized and solidified under high pressure to form a casting. High pressure and high speed are the main characteristics of die casting. The commonly used pressure is tens of MPa, the filling speed (ingate speed) is about 16-80 m / s, and the time for the molten metal to fill the mold cavity is extremely short, about 0.01- 0.2 seconds. Since casting castings by this method has the advantages of high production efficiency, simple process, ...

AI Technical Summary

Problems solved by technology

Due to the complex shape of the casting, some of the tributaries move faster (such as ribs along the flow direction of molten aluminum), and some of the tributaries move slower (such as ribs perpendicular to the flow direction of molten aluminum). If the vacuum valve is closed too late, these faster tributaries will The liquid first enters the gap between the vacuum valve sleeve and the valve core, causing the vacuum valve to block

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