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In Welding Irregular Copper Soft Connections with a Polymer Diffusion Welder, How to Avoid Local Cold Joints Caused by Misplaced Workpiece Placement?

Oct 13,2026

Irregular copper soft connections are stacked from multiple layers of copper foil and then diffusion-welded with a polymer diffusion welder. If the workpiece is placed tilted or misaligned, it causes uneven pressure and heat, producing local cold joints.

I Hazards of Local Cold Joints Caused by Misplaced Placement

1.The misaligned interlayer areas receive insufficient pressure and heat, the interface cannot fully bond, forming local cold joints

2.The overall bonding strength at cold-joint positions decreases, and peeling easily occurs from the defect position under force

3.The effective conductive cross-section shrinks

II Main Triggers of Misplaced Workpiece Placement

1.Positioning datum and tooling problems

2.Influence of the workpiece's own condition

3.Personnel operation and equipment factors

III Prevention and Control Solutions to Avoid Local Cold Joints from Misplaced Placement

1.Optimize tooling positioning and support structure

2.Standardize stacking and loading operations

3.Rationally match the welding process

4.Production-process quality control

Wuxi Haifei Intelligent Equipment Co., Ltd. https://www.haifeiwelder.com/

Wuxi Haifei Intelligent Equipment Co., Ltd. has been focusing on the R&D and production of diffusion‑welding equipment for 17 years. The company has passed ISO9001 Quality Management System Certification, China Compulsory Certification (3C) and CE Certification. It is a National High‑tech Enterprise, a Specialized, Refined, Differential and Innovative Enterprise of Jiangsu Province, a Specialized, Refined, Differential and Innovative Enterprise of Wuxi, and a Gazelle Enterprise in the Southern Jiangsu National Self‑Dependent Innovation Demonstration Zone.

Should you be interested in our diffusion‑welding equipment, please contact us: 400‑0510‑750.

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