Objective: A medical device manufacturer is looking to use induction shrink fitting in their production process. The objective of this test is to demonstrate the selected induction heating equipment and demonstrate temperature control, uniformity, and repeatability.
We need to heat the top part of the aluminum can to allow for a shrink fitting. The customer did not provide the part to be dropped in after aluminum is expanded. The requirement is to reach heating with a temperature of 260°C (500°F) for 10 seconds or less.
Industry: Medical & Dental
Equipment: To achieve and confirm the client’s key points we conducted the test with UltraHeat SM – 5kW Induction Heater and a square induction coil.
Process: The heated part is aluminum medical assembly with dimensions 6.86 cm x 4.06 cm x 7.62 cm (2.7”W x 1.6”L x 3”H) and thickness 0.135 cm (0.053”). For the purpose of this application, we have to heat with induction the top section of the can, about 2.54 cm (1”) from the top lip.
The power supply was set up to 4.88 kW of power and temperature of 260°C (500°F). To confirm the reached temperature we used tempilaq paint in the heated zone. After about 15 seconds of applied power, the tempilaq changed phase indicating that the temperature was reached.
Benefits: Our recommendation for this shrink fitting application is to use a custom induction coil adapted to the shape of the heated parts. This will make the process more efficient and therefore decrease the cycle time.
Reference Info: Application Note 3463-7077
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