Page 194 - Electromechanical Devices and Components Illustrated Sourcebook
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156 Electromechanical Devices & Components Illustrated Sourcebook

                                   Solder Pot





                Temperature Adjustment
                                              5
                                            4   6
                                           3      7
                                          2       8             Power Switch
                                          1       9
                                                                                            American
                                           0     10
                                                                                        Paste Flux
                                          OFF    ON
                                                                      Base
                                                                                         Flux Container
                                                                    Foot
                     AC Cord
                                                     120 VAC


                Figure 9-23 Solder Pot



           Tinning is the process of coating a component with solder.  Sometimes, this is the only effective way to remove solder
        This is a common step during production soldering opera-  from large joints, but is not recommended for smaller, high-
        tions. Solder pots, as shown in Figure 9-23, are used to heat a  density assemblies. Figure 9-25 shows three common solder
        pool of solder. A flux container is placed adjacent to the sol-  removal tools. A solder wick is used to draw the solder from
        der pot. A stripped wire is dipped into the flux and then into  the joint. As the joint and wick are heated, the solder flows
        the solder and is instantly tinned. The tinned wire is now pre-  into the tinned wire braid and is drawn away from the joint.
        pared for a production solder joint.                  When the wick cools the solder-filled end is cut off and dis-
                                           60
           Most solder intended for electrical use is  / flux core. The  carded. A solder sucker is a heavy rubber ball with a high tem-
                                             40
        60 / refers the ratio of tin to lead that makes up the alloy.   / 40  perature tip. The bulb is squeezed and the tip is placed at the
                                                       60
          40
        solder is 60% tin and 40% lead. The flux, which is sometimes
        referred to as rosin, is carried in a circular core at the center of
        the solder. Solder that does not have a flux core requires that
        the flux be applied before soldering the joint. Figure 9-24
        shows three different solder cores. Multicore is generally
        found in very fine solder intended for electronic work. Flux
        core is usually used for general wiring applications and solid
        core is principally specified for heavy applications such as
        large cables and buss bars.
                                                                                        Reset Plunger
                                                                    Squeeze Bulb


                                                                                         Trigger







                Multicore       Flux Core         Solid
          Figure 9-24 Solder Cores                                                     Tip
                                                                                          Cylinder
                                                                              Solder Sucker
           Disassembling a solder joint can be rather difficult, espe-
        cially if the joint was done correctly. Some technicians heat
        the joint and forcibly blow the molten solder off. This works  Solder Wick             Tip
        if a source of compressed air is available and you don’t mind                           Vacuum Removal Tool
        spraying down adjacent components with molten solder.  Figure 9-25 Solder Removal Tools
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