Heat staking methods



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The BHS HOT STAMP® process is a so-called hot stamp riveting process. The rivet head is equipped with a stamp that can be changed quickly. The stamp can be individually selected for each rivet geometry and easily exchanged. Precise and fast temperature control, based on continuous temperature measurement directly at the contact point between the stamp and the rivet pin, also known as the plastic dome, allows the rivet pin to be brought to the optimum melting temperature and formed quickly and stably. In this way, even highly filled, high-temperature-resistant semi-crystalline thermoplastics, so-called high-performance polymers or engineering plastics, can be processed reliably. The forming movement is performed by an infeed integrated in the rivet head, the caulking pressure of which is variably adjustable. A displacement measuring system monitors the position of the rivet head and thus the presence of a rivet pin and the end position. Safe and thread-free removal without pre-weakening of the riveted joint is ensured by an integrated air cooling system. The process control is variable and is carried out individually, product- and requirement-specific.

Process sequence

First, the stamp is heated up. As soon as it has reached the process temperature, it is moved onto the rivet pin with preset pressure and melts the material until it has reached the end position and formed a rivet. Finally, it is actively cooled, the stamp is detached and moved back to the home position.  With one riveting head, all process steps of heating, melting, forming, cooling and detaching are carried out, so that this process is also referred to as the "single-cycle process".



Contact riveting method

Electric heating of the stamp

Temperature measurement on the stamp

Process temperature control in milliseconds

Internal air cooling

Quick-change stamp system

Volumetric rivet head dome

Integrated displacement encoder

Typical process times 15-20 seconds


Low mechanical influences

No thermal stress 

Suitable for flanging and sealing

Special and multiple tools possible

The BHS HOT STAMP® process is particularly suitable for temperature- and pressure-sensitive components and riveting environments as well as for confined installation spaces.

Request Design Guideline

bdtronic offers standard tools that represent an optimal riveting as a compromise between low cycle time and maximum strength. Request our design guidelines today!

Heat staking applications

Technology center

Benefit from our expertise and many years of experience and develop the optimum process for your requirement together with us. We are specialists for different heat staking processes.