Pcb reflow professional#

Furthermore, other factors such as speed of band carrier, wave contact time etc. In addition, alloy won't be generated by flux and metal if temperature is not sufficiently high. If temperature is set to be too low, flux won't be melted so that it won't maintain activity, reaction capability and capabilities to dissolve oxide and dirt on the surface of metal.

Pcb reflow professional#

As far as time and temperature are concerned, a professional wave soldering machine is of much necessity while PCB Assembler's expertise and experience are seldom easy to obtain since they depend on years' accumulation, application of up-to-date technologies and business focus. After being cooled to room temperature, board will be successfully assembled.Īs circuit boards are placed on pallet ready to go through wave soldering, time and temperature are closely associated with soldering performance. As temperature reaches the peak in wave soldering stage, its reduction comes, which is called a cooling zone.

Wave soldering profile conforms to a temperature curve. As temperature constantly rises, solder paste becomes liquid with a wave formed from whose edge boards will travel above and components can be solidly bonded on boards. In a pallet along a chain similar to conveyor belt, PCBs travel through a heat tunnel to carry out pre-heating and activate flux. Leading functions of solder flux include:ġ) To eliminate oxide from metal surface of boards and components' pins Ģ) To stop circuit boards from secondary oxidation during thermal process ģ) To reduce surface tension of solder paste Solder flux plays a crucial role in smooth implementation of soldering.

Cleanliness of metal surface is the basic element ensuring soldering performance, depending on functions of solder flux. Wave soldering process is composed by four steps: flux spraying, pre-heating, wave soldering and cooling.