Preheater TechnologiesEnhancing the soldering process

Preheating is used for heating the board to enhance the solder process. It helps in activating the flux. This method assists solder pull through on multi-layer PCBs and components with significant ground planes. It also reduces the risk of component thermal shock.

With the introduction of lead free solders, it has become almost essential to have some form of pre-heating. Closed-loop control can be used for precise and reliable heating and provides added confidence to your process.

Preheater Technologies

Selective Hot Nitrogen

Selective Hot NitrogenBy heating a flow of Nitrogen, the soldering systems are able to preheat a localised area of the PCB whilst maintaining the inert atmosphere.

Top Side Infrared Preheat

Top Side Infrared PreheatBy using fast response infrared lamps Pillarhouse has the ability to preheat the board: before fluxing, during fluxing and/or after fluxing.

Bottom Side Infrared Preheat

Bottom Side Infrared PreheatBy using fast response infrared lamps Pillarhouse has the ability to preheat the board after fluxing.

Bottom Side Ring Infrared Preheat

Bottom Side Ring Infrared PreheatBy using a fast response ring infrared lamp Pillarhouse has the ability to preheat the board during the soldering cycle.

Top and Bottom Side Infrared Preheat

Allows simultaneous heating of the top and bottom side where the application dictates for complex or heavy multi-layer boards.


ConvectionThis additional source of preheating offers the ability to ‘soak’ PCBs for prolonged periods with minimal risk of scorching and further reducing the possibility of thermal shock to components. Convection preheat can be particularly beneficial when processing large multi-layer PCBs when cycle time is not critical e.g. back planes, aerospace applications etc.

Preheater Control

Closed-loop control

Closed-loop controlPyrometer based closed loop control system.

  • Adjustable position to monitor PCB, or specified area (component).
  • Monitors target temperature and adjusts the operating power automatically.
  • Applies to both top side & bottom side preheat systems.
  • Real-time display of target temperature.

Open-loop control

  • Uses operator set values for power and exposure time.
  • Applies to both top side and bottom side preheat systems.