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Design and Performance Analysis of a Multi-Motor Coaxial Drive System for High-Precision Heavy-Duty Injection Molding Machines

Author(s)

Liang Jin

Affiliation(s)

Tederic Machine Co., Ltd., Hangzhou, Zhejiang, China

Abstract

With the increasing demand for high-performance polymer products in aerospace, automotive, and other high-end fields, reaction injection molding technology has attracted significant attention due to its ability to manufacture complex structural parts with high surface quality. As the core equipment, the structural design of the injection molding machine directly affects molding precision and efficiency. Addressing the issues of stability, precision, and service life of the drive system under heavy-duty conditions, this paper conducts design research on a multi-motor coaxial drive system. By employing a dual-ball-screw and dual-motor drive structure, combined with a synchronous control algorithm and fault protection mechanism, high-load stable operation during the mold clamping process of large injection molding machines is achieved. The synchronous precision, load distribution, and dynamic response characteristics of the drive system are analyzed, and its effectiveness is verified through typical applications. The research results indicate that this drive system can significantly improve the repeatable positioning accuracy and anti-interference capability of injection molding machines, providing technical support for the fully electrified design of high-precision heavy-duty injection molding machines.

Keywords

Injection Molding Machine; Multi-Motor Drive; Coaxial System; Heavy-Duty; Synchronous Control; Structural Design

References

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