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Written by Jinnfeng Plastic on . Posted in News.

Analysis of EDM in Injection Mold Processing Procedures

This article delves into the principles, prominent characteristics, and unique advantages of Electrical Discharge Machining (EDM) in injection mold processing, highlighting its role in achieving high-precision and complex-shaped mold parts.

Electrical discharge machining (EDM) holds a pivotal position among the various processing techniques employed in the production of injection molds. This article explores the underlying principles, distinctive features, and the intricacies of EDM, shedding light on its crucial role in the mold-making industry.

EDM for Plastic Injection Molds

Unveiling the Principle of EDM

The seemingly intricate principle behind EDM is actually quite ingenious. During the process, the workpiece and the tool electrode are submerged in a flowing working fluid and connected to the positive and negative poles of a pulse power supply, respectively. The pulse generator initiates spark discharge between the two, creating an extremely short-lived discharge phenomenon confined to minute points. This highly concentrated energy results in the melting and vaporization of metal material, gradually eroding both the workpiece and the tool electrode. The flowing working fluid removes the corroded metal, replicating the contour of the tool electrode onto the workpiece.

Prominent Characteristics of EDM

Advantages of Post-Quenching Processing

Traditional processing methods often struggle with quenching deformation, which can significantly alter the size and shape of the workpiece. EDM circumvents this issue by being performed after quenching, thereby maintaining the dimensional accuracy and shape stability of the workpiece.

Ability to Process Complex Shapes

EDM excels in processing complex-shaped parts due to the non-contact nature between the electrode and the workpiece. This absence of cutting forces allows EDM to tackle low-rigidity parts with intricate internal structures and unusual shapes effortlessly.

High Quality, Wide Adaptability, and High Automation

EDM guarantees high-precision processing, resulting in superior surface quality and dimensional accuracy. Its adaptability spans various materials and hardness levels. With the progression of technology, the automation of EDM has surged, significantly boosting processing efficiency and production benefits.