A Wave Soldering Machine forms joints on through hole components by applying flux, preheating the PCB, and bringing selected or broader board areas into contact with molten solder. This category includes selective soldering configurations, WZ 350 and WZ 550 equipment, and related systems for THT or mixed technology production. Conventional wave soldering can process many joints as the board passes over a solder wave, while selective soldering targets defined locations with controlled motion and nozzle application. The preferred method depends on board layout, bottom side component clearance, heat sensitivity, joint density, and required flexibility. Flux deposition, preheat, solder temperature, contact time, conveyor control, and cooling all influence joint appearance and reliability. Buyers should define maximum PCB size, board thickness, component lead length, pallet requirement, solder alloy, flux type, production output, and the location of bottom side components. For selective equipment, nozzle diameter, motion range, pump control, programming, and changeover are key. For broader wave systems, conveyor angle, finger or pallet handling, wave stability, dross control, preheat length, and exhaust deserve attention. Wave Soldering Machine applications include power electronics, industrial controls, appliances, automotive modules, communication products, transformers, connectors, terminals, and other assemblies containing leaded components. A mixed SMT and THT board may require careful protection of surface mount devices during soldering. Process engineers should use representative products to establish flux quantity, preheat profile, immersion conditions, and acceptable joint criteria. WenZhan recommends supplying board drawings, bottom side images, component heights, joint locations, solder alloy, target cycle, available utilities, and required soldering method. Confirm whether the project concerns WZ 350, WZ 550, selective soldering, or another configuration, and request a complete description of nozzles, flux unit, preheaters, conveyor, software, and exhaust. A sample soldering trial can reveal bridging, insufficient fill, thermal limitations, and accessibility. This technical preparation helps the selected Wave Soldering Machine deliver stable through hole joints within the factory's actual product and process conditions.
