To improve the weld on a 610×708 container, several critical factors must be considered based on the information provided:

  1. Use of double refrigerated pulley: It is essential to have a welding machine with double refrigerated pulley to obtain a proper weld.
  2. Oxidation control: Apply nitrogen gas during soldering to eliminate the presence of oxygen and prevent oxidation of the iron, which is essential to ensure good adhesion of the protective coating.
  3. Welding frequency setting: Incorrect frequency setting can result in a weak weld. Make sure that the frequency is correctly calibrated to avoid weaknesses in the weld.
  4. Cleaning of the welding wire: Verify that the welding wire arrives clean to the profiling area and that it maintains a bright finish to avoid weak or marked welds.
  5. Centering of the tin trace on the wire: Check that the tin trace is centered on the wire to avoid irregularities in the soldering.
  6. Condition of the idler pulleys: Check that the idler pulleys are not braked and that the pendulum pulley is correctly aligned.
  7. Welding wire guide channel: Make sure that the channel guiding the welding wire is correct and that its profile adequately contains the wire.
  8. Seam varnishing: Perform a proper varnishing, preferably in an inert atmosphere, to avoid oxidation and ensure the adhesion of the varnish.
  9. Temperature and cure time control: Properly adjust the electrostatic powder cure time and temperature to ensure proper polymerization and adhesion.

By following these recommendations and carefully controlling each step of the welding process, the quality of the weld on metal containers can be improved.