PP folders have become an evergreen tree in the field of office supplies due to their lightweight and chemical resistance. Ultrasonic welding technology, with its advantages of no need for glue and being environmentally friendly and efficient, has gradually replaced traditional hot melt or adhesive processes and become the mainstream solution for PP folder edge sealing. The edges of the welded folder are smooth and have strong sealing, which can not only improve the appearance of the product, but also extend its service life.

However, when cracks appear on the welding surface, it can lead to a sharp increase in the defect rate. Starting from understanding the product characteristics of ultrasonic welding machines, this article analyzes the causes of cracking on the welding surface of a single source ultrasonic welding machine, and provides a systematic fault diagnosis and maintenance process.
Welding surface cracking: multiple causes leading to cracking
1.Inaccurate equipment parameters: Short welding time, insufficient pressure, or frequency deviation can lead to insufficient fusion; On the contrary, if the parameters are too high, it may cause the material to overheat and degrade.
2.Poor material compatibility: If PP material contains recycled materials or improper proportions of additives, it will reduce the melt flowability and affect the welding strength.
3.Mold design defects: Mismatch between the welding head and the product contact surface, or unreasonable design of the energy director, which can easily cause local stress concentration.
The Sonicpower ultrasound technology team suggests that companies should build a closed-loop management system from the three steps of "prevention diagnosis repair": regular calibration of equipment parameters, strict control of raw material quality, and optimization of mold structure, which can significantly reduce the risk of cracking. If the problem has already occurred, it is necessary to quickly stop losses through a systematic process.
Sonicpower Ultrasonic Maintenance Service: Precise Troubleshooting from Online to Offline
1. Online consultation: The customer describes the fault phenomenon of a source ultrasonic equipment through photos or videos, and the engineer makes a preliminary judgment of the fault.
2.On site inspection: The technical team brings professional testing tools to the site to quantitatively analyze core indicators such as welding machine power, frequency, and pressure, and identify the cause of the malfunction.
3.Determine the plan: Based on the inspection report and customer production needs, provide repair or upgrade suggestions, clarify costs and cycles, and ensure transparent decision-making.
4. Maintenance and debugging: After the equipment maintenance is completed, simulate actual working conditions for multiple rounds of testing and adjust to the optimal welding parameters.
Cracking on the welding surface is not an unsolvable problem, the key is to see the essence through the phenomenon. Through the collaborative optimization of equipment, materials, and processes, coupled with professional maintenance services, enterprises can not only recover losses, but also enhance the stability of ultrasonic welding processes, allowing PP folders to demonstrate quality competitiveness in details.
Sonicpower Ultrasonic is an expert in the field of ultrasonic equipment with over 30 years of experience in the industry. Its professional technical team has years of research and development, design, and maintenance experience. If you are looking for a high-performance welding equipment, Sonicpower Ultrasonic Welding Machine is undoubtedly your ideal choice. Choose Sonipower to make your production more efficient and precise!