An organization from the automotive industry had been using torch heating for their steel rod assembly preheating process. However, due to process improvements thanks to new automation in their facility, torch heating became too slow. This resulted in a backlog that kept them from maximizing throughput. So they turned to THE LAB at Ambrell to see if induction heating could resolve this issue. 

Bonding involves connecting metal or materials containing metal to materials such as plastic, rubber or thermoplastic materials without using a bonding adhesive. Bonding with induction entails accelerating the polymerization of an adhesive by heating the metal parts to be joined. The required temperature range is generally from 150 ºC to 220 °C. Accurate heat control is critical to successfully bonding with induction heating. 

The induction work coil, also known as the inductor, is the component in an induction heating system that defines how effectively and efficiently the work piece is heated. A current flowing in a conductor creates a magnetic field. An alternating current creates an alternating field which produces an alternating current in a second conductor (your part or work piece).

In the latest application video from THE LAB at Ambrell, a steel gear is heated to 400 °F (204 °C) for a shrink fitting application. An Ambrell EASYHEAT^TM 6 kW induction heating power supply is used. You'll see that temperature indicating paint -- which liquefies and turns clear when the target temperature is achieved -- is applied to two spots on the part.