How to solve the gap in ultrasonic welding
How to deal with the gap in the ultrasonic welding?
There are gaps when ultrasonic welding plastic products, which will affect the appearance of the product, and the welding strength is not strong enough.
1. Plastic product structure
a. The design of the ultrasonic welding line is unreasonable, the welding line is too high (too thick), the standard welding line is high (0.3-0.8mm), there is a gap after welding, and the welding line height is appropriately reduced; the welding line is too thick, the shape of the welding line is reversed Triangular, there is a gap after welding, can reduce the angle.
b. The internal structure design of the plastic product is unreasonable, and the non-welded parts can not be welded down.
2. Ultrasonic welding tooling
a. The mold does not completely press the product on the ultrasonic wave.
b. The design of ultrasonic bottom tooling is unreasonable. When ultrasonic welding, the welding part needs sufficient support, and the welding part is hollowed out, which causes the product to move down synchronously with energy during ultrasonic welding.
3. Adjustment of ultrasonic welding equipment
a. The power of the ultrasonic welding machine is reduced.
b. Reset welding parameters.
Advantages of ultrasonic welding machine
The welding head vibrating with ultrasonic ultra-high frequency under moderate pressure makes the joint surfaces of the two plastics generate frictional heat and melt and join instantly. The welding strength is comparable to that of the main body. The use of suitable workpieces and reasonable interface design can achieve water tightness and It is airtight, and avoids the inconvenience caused by the use of auxiliary products, and realizes efficient and clean welding.