Material Drying
2 views
Poor ABS ultrasonic welding
Problem Phenomenon
After ultrasonic welding of two ABS parts, the strength is low, the weld line flashes, or cold welds appear, and the welding quality is unstable.
Cause Analysis
The welding surface has mold release agent/oil; welding energy, amplitude, and holding time parameters are improper; the product's welding rib design is unreasonable; when the moisture content is high, the interface vaporizes and produces bubbles and cold welds.
Solution
①Clean the welding surface; ②optimize the amplitude—pressure—time parameters and do DOE; ③design the energy director according to the material supplier's recommendations; ④ensure the product is dry; ⑤do strength verification after welding.
Key Takeaway
For ABS ultrasonic welding, 'clean the surface first, then adjust parameters, then check the structure': welding surface cleanliness is the premise, parameter matching is the core, and energy director design is the foundation; moisture causes cold welds, and drying is equally important.
Was this helpful?
0 people found this helpful
Thank you for your feedback!