Air Collar Cooling Unit
Original Publication Date: 1985-Jun-01
Included in the Prior Art Database: 2005-Feb-18
A hot air repair terminal utilizes a heater tube to raise the temperature of Sn/Pb solder to allow rework of surface-mounted devices on printed circuit cards. Because the card must be removed from the heating source, the solder is still molten such that component shifting and solder joint cracks are incurred. This problem is solved by an air collar that mixes cool air with the hot air exiting the heater tube to bring the temperature below the melting point and allow the solder joints to solidify so the card can be removed without component shifting or solder joint cracks.