Induction Heat Staking an Arthroscopic Device

Objective

A manufacturer in the medical industry came to THE LAB at Ambrell with a heat staking application involving a arthroscopic device. They needed to use induction to bond the device's sheath to the collet. Fast, localized heating that didn't impact fixturing were key considerations for this company, and ultimately the rationale for choosing induction heating from Ambrell. 

Evaluation

THE LAB determined an Ambrell EASYHEAT^TM 10 kW, 150-400 kHz induction heating system would be the right solution for this metal-to-plastic insertion application. Initial testing was performed to optimize the power delivered to the part. The sheath was then placed in the metallic fixture. The heat-cycle was applied, which was on for 300 milliseconds and off for 6.5 seconds. The heated sheath was indexed for insertion into collet. The feasibility of the application, which met the client's requirements, was successfully demonstrated.

Solution

Induction offered several benefits for this heat staking (or indirect induction heating) application. It offered localized, even heating of the sheath which reduced discoloration. The innovative coil design offered by THE LAB at Ambrell eliminated fixture heating and the associated wear. The ability for the client to have metallic fixturing allowed for an elevated production rate. Additionally, the speed of heating also boosted the production rate, while induction offers hands-free heating that isn't dependent on operator skill. Not being dependent on operator skills results in improved repeatability. 

If you have an application, be sure to take advantage of complimentary application testing from THE LAB. We now offer Virtual Lab Service so you can observe testing live from our laboratory from your office. Contact us today to get started.