Plastic Welding SiQ Series / iAGL Series / iTPS Series

Ultrasonic plastic welding indicates all thermoplastic materials that will be connected to each other in the welding seams. Under the interactions of force and energy, the longitudinal vibration and twisted welding in a frequency of 20kHz, 30kHz, 35kHz and 40kHz with an amplitude energy of 6 μm to 60 μm will be guided to plastic. The weldment and the mold structure will be welded together by ultrasonic vibration. People call these special structures in a weldment as an energy angle. Joining the direct contact angle between the surface profiles and thermoplastic parts can be focused to directionally deform by transferring high-frequency energy from a melting line. The materials will be melted by heat produced by friction of contact surface.


Spot Welding

The molded parts to be welded will be stacked together without preparing the welding points in advance and needless of the energy angle. The tip passes from the upper plate to the lower one, and plasticizes in them. The produced melts will get together in the boundary seams, and form the partial connection in spot over there.


When rivets can’t pass through the parts, curling will be an appropriate alternative. In curling, the front side of a welding head must form the corresponding shape. The steps and the loop times are consistent with riveting. In large parts, even when the deformation on the entire side length of a large part is treated, ultrasonic curling can easily implement.


Thermoplastic can be quickly and cleanly connected with metal or non-weldable part by ultrasonic riveting. No additional components will be required. Heat produced in riveting can be quickly discharged by air when cooling the welding head. After finishing the basic riveting process, the system will completely solidify melts under static pressure in the holding time by default. This way can avoid rebounding and achieve the seamless connection.

Step Seam

This type is easy to implement relative to injection molds. For amorphous plastic, this type can form the appearance without defects, with high strength and the completely sealed connection. Other advantages include automatically centering, high shear and pulling endurance.

Tongue and Groove Seam

The connection of tongue and groove seam can implement the maximum strength in normal conditions. The seams with extremely small tolerance will produce the capillary effect. The formed melts will fill up the entire seam area. This type requires larger thickness of wall. Whenever the conditions are allowed, we recommend it be applied.

Shear Seam

For partially crystalline plastic with extremely thin thickness of wall, the applications for shear seam have been already mature. This type can implement sealing and welding with high strength in the larger welding depth.

Thin-wall Welding Wire

It is recommended this type be applied for the part with a wall thickness less than 1.5mm. It not only provides a good ability to automatically center, but also produces a support layer to ensure high strength after welded. Note that the seams must be accurately matched, and the injection must be accurate as well.