In this application test, we are heating to curing temperature using induction, to attach a speaker diaphragm to a speaker basket. The adhesive will be applied to the speaker basket, and the speaker diaphragm placed immediately above. The adhesive has an activation temperature of 134° F, or 57° C. The customer wants to use induction for heating the speaker basket to the curing temperature. This will activate the adhesive, and create the bond to the rubber speaker diaphragm.
- The speaker basket was carefully positioned immediately below the induction coil, making sure that there was no contact between the basket and coil.
- Several tests were run to determine the appropriate power level and operating time to achieve the necessary temperature, with power levels ranging between 40% and 60%. Temperature was monitored with an infrared temperature gun. Video was taken with the gun, to verify the temperature and timing.
- Precise control of the time and temperature
- Power on demand with rapid heat cycles
- Reduction in defects due to overheating
- Minimal handling of speaker diaphragm, reducing potential damage
- Repeatable process, not operator dependent when parts are set in a nest or fixture