Plastic Welding in Cartridge Manufacturing: CW’s Expertise
2025-07-25

CW Plastic Welding Techniques for Toner Cartridge Assembly


Plastic Welding in Cartridge Manufacturing: CW’s Expertise 

Did you know that a toner cartridge is typically joined by welding the cartridge body and the cartridge cover together? There are various plastic welding methods, generally classified into three major categories: mechanical energy welding, external heat source welding, and electromagnetic welding. These techniques are widely used across industries for joining thermoplastic components. 

At GPI, we specialize in mechanical energy welding methods, particularly ultrasonic welding and vibration friction welding, for cartridge assembly. These processes are ideal for high-precision, high-strength bonding without the need for adhesives or solvents. 

Ultrasonic welding utilizes high-frequency vibrations applied to plastic parts under pressure, generating localized heat through friction that causes the materials to fuse. It is suitable for having fast weld for small plastic. 

Vibration friction welding, on the other hand, involves the relative movement of parts under pressure, creating heat through surface friction. This method is especially effective for larger bonding areas and offers excellent joint strength. 

When developing new models, the sealing method is determined by the sizes of the cartridge and plastic materials. By leveraging these advanced welding technologies, GPI ensures robust, reliable, and consistent assembly of our toner cartridges, delivering the quality and durability our customers expect. 

In the next article, we will introduce the several tests we conduct during the development and production to ensure the sealing tightness to prevent the toner from leaking. Don’t miss out.