Copper rotor non-core-puling vacuum die casting mould

Abstract

The invention discloses a copper rotor non-core-puling vacuum die casting mould which can be used for producing a long iron core copper rotor. According to the mould, a movable template and a core-pulling slide block are machined integrally, and a core-pulling slide block structure is eliminated; through the wedged structure design and rational tolerance design, the problem that the long iron corecopper rotor is eccentric is solved effectively; meanwhile, a casting cavity is used as a first vacuum-pumping system, and a mould space outside the casting cavity is used as a second vacuum-pumpingsystem; gas leaking from a fit clearance, an ejection system and the casting cavity is pumped out, so that the vacuum degree of the casting cavity is achieved effectively; the copper rotor after die casting has high concentricity, and the vacuum die casting process production of such copper rotors is achieved.

Description

technical field [0001] The invention relates to a copper rotor core-free vacuum die-casting die, which belongs to the field of die-casting dies. Background technique [0002] Copper's excellent electrical conductivity, excellent thermal conductivity, and high-pressure casting have the advantages of short molding cycle, high production efficiency, and environmental friendliness, making cast copper rotors widely used in high-efficiency motors with the implementation of motor energy efficiency policies. However, due to the high melting point of copper (the melting point of copper is 1083.4°C), the pouring temperature of die casting copper rotor is higher, resulting in a much higher mold temperature than aluminum die casting, especially for long iron core rotors, which use a large amount of copper, above 10kg , At the moment of injection, the mold temperature can reach more than 800°C in an instant. As a result, during the development of vacuum technology, it was found that conv...

AI Technical Summary

Problems solved by technology

The force is concentrated at the installation position. When the length of the rotor core is long, such as when the length of the middle spindle rotor reaches more than 200m, due to the static mold locking on the parting surface, the pressure on the tail of the upper half block is insufficient, and the mold bulges. The molding force is greater than the pressure of the oil cylinder acting on the tail of the upper half block, which causes the upper half block to be tilted at the far end, which is inclined to the horizontal plane of the die-casting machine, causing the part of the rotor core close to the parting surface to deflect downward, and close to the moving part. The mold part is biased upwards, the center of the produced rotor is not at the same level, the concentricity is poor, which affects the use of customers, and in serious cases, the rotor cannot be corrected and scrapped

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