Tinning appts. for copper, tin, bronze or nickel wires - has an acid etch bath, a tin (alloy) bath and a nozzle to remove excess metal

摘要

In an appts. for thick tinning of Cu, Sn, Bronze or Ni lead wires of circuits and components, the wire is passes in turn through an acid etch bath, a tin(alloy)bath, with a first guide pulley, a wave shaped nozzle to wipe off surplus metal, and a cooling region with a broad guide pulley. The guide roll in the tin (alloy)bath has a protective coating of silicon nitride. It is further provided with stainless steel reinforcement. Thermal shock resistance is good at 20-350 degrees C (dipping pulley into the tin bath). The surface is not wetted by molten tin (alloy), the material has good mechanical strength, even under impact loading, exhibits low friction at 20-350 degrees C when immersed and when in air, low wear, low thermal expansion.