The power adapter casing is generally made of plastic, although some industrial power supplies use metal casings. Commonly used materials for power adapter shells are mainly ABS material, ABS+PC material, and pure PC material.
1. PC material
Pure PC material has ultra-high strength and elasticity coefficient, and a wide operating temperature range (ABS material is generally only used at -25℃-60℃). In addition, PC material has high transparency and can be dyed freely, making it suitable for power adapters of various colors. In addition, the material is weather-resistant, tasteless, odorless, harmless to the human body, and meets health and safety requirements.
2. ABS material
Compared with PC, ABS has lower strength and is not temperature-resistant in terms of material properties. The general use temperature cannot exceed 60°C, while ABS is generally used in household appliances.
3. Synthetic materials of ABS and PC
The characteristics of both are excellent molding performance, good fluidity and high strength. ABS+PC materials are easy to process, have good processing dimensional stability, good surface gloss, and are easy to perform secondary processing functions such as painting, coloring, metal spraying, electroplating, welding, and bonding. Because the characteristics of ABS combine the characteristics of the three components, it has excellent comprehensive performance and has become one of the preferred plastics for power components, home appliances, computers and instruments.

It can be said that the power adapter ultrasonic welding machine has been widely used in our lives and work. The ultrasonic welding machine can be used to weld various mobile phone chargers and notebook power adapter shells. It has the characteristics of high welding efficiency and firm welding. However, during the ultrasonic welding process, if the machine is improperly selected or there is a problem with the ultrasonic mold design, the welding may not be firm. Therefore, when performing ultrasonic welding on the charger, the following points should be noted:
1. Try not to use materials with recycled plastic added
2. The plastic shell wall should be thick enough
3. Use an ultrasonic welding machine with sufficient power such as 2600W. If the power is insufficient, the welding time will inevitably be increased and it is easy to cause surface welding damage. (Ultrasonic welding generally pursues the goal of completing welding in as short a time as possible)

With the diversification of data welding, plastic welding technologies are diverse, and ultrasonic plastic welding is widely used. Ultrasonic plastic welding has low cost, short welding time, high production efficiency, and high performance. It has been widely used. The characteristic of ultrasonic wave is that the heat is concentrated only on the welding part, making the welding seam strong and beautiful. Regardless of the polarity of the plastic, almost all thermoplastic plastics can be welded with ultrasonic waves. It is especially suitable for plastics with higher hardness. Ultrasonic welding can also be used for dissimilar plastics.