Grouping injection molding method

Abstract

The invention provides a grouping injection molding method. The grouping injection molding method is used for carrying out grouping of injection molding holes distributed in the periphery of a rotor in a ring mode for injection molding, so that the position of magnetic steel in the large-stack thick rotor is stable and reliable, the method improves the production efficiency, and the injection molding cost is reduced, The M injection molding holes are uniformly distributed on the top of the to-be-injection-molded rotor in the ring mode, the to-be-injection-molded rotor is placed in a cavity ofa lower mold, injection molding discharging ports of an upper mold align with the L injection molding holes arranged continuously, wherein M = N * L, the bottom of the lower mold is arranged on a servo turntable, a servo motor is driven to drive the servo turntable to rotate, the injection molding of the L injection molding holes per single time is completed, preset rotating angles correspond circularly by the servo motor, the injection molding of the next set of L injection molding holes is carried out until the operation that mold is opened and the rotor is taken out after the injection molding is conducted of all the injection molding holes at the top of the rotor is completed.

Description

technical field [0001] The invention relates to the technical field of motor integrated structures, in particular to an indexing injection molding method. Background technique [0002] The drive motor is one of the three major components of electric vehicles. The stability and reliability of the motor have penetrated into every link of motor design and manufacture; the rotor is embedded with magnetic steel with strong magnetism to form the rotor magnetic field. The position of the steel in the rotor needs to be fixed, and the reliability of the fixation directly affects the stability of the magnetic field of the rotor, thereby affecting the performance of the motor; the existing injection molding process realizes magnetic Steel fixation. [0003] However, the existing rotor injection molding process cannot be used on large-stacked rotors, because the injection molding holes of large-stacked rotors are longer and there are more fillers, which is difficult to achieve through ...

AI Technical Summary

Problems solved by technology

[0003] However, the existing rotor injection molding process cannot be used on large-stacked rotors, because the injection molding holes of large-stacked rotors are longer and there are more fillers, which is difficult to achieve through traditional integral injection molding, and the injection molding process of large-stacked rotors requires additional To set up the process flow, a lot of tooling is needed, which increases the cost of design and production, and the process flow is complicated, the production cost is high, and the production cycle is long

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