Causes and solutions of board sticking in reflow soldering furnace

In daily reflow soldering processes, there are often problems with boards. In the face of this situation, timely and correct handling is very important. JEENOCE shares the reasons and solutions for boards appearing in reflow soldering furnaces.

The reasons for the occurrence of card boards in the reflow soldering furnace may include:

1. PCB board design issues: If welding issues are not considered during design, resulting in deformation and board jamming during the production process.

2. Unstable conveyor belt: Problems such as unbalanced conveyor belt and inconsistent speed can cause the board to get stuck, affecting production progress.

3. High or low reflux furnace temperature: Unstable reflux furnace temperature or improper temperature adjustment can also cause board deformation or jamming.

4. Insufficient preheating of PCB board: The deformation of the board caused by insufficient preheating can also affect the conduction effect and the occurrence of board jamming.

5. Excessive solder paste during welding: Improper or excessive application of solder paste can easily cause the board to get stuck.

The solutions are:

1. PCB board improvement design: Design a reasonable PCB board to avoid being too thin or too thick, while also handling the rigidity and bending of the board.

2. Maintenance and upkeep of conveyor belts: Regularly check the stability and speed of the conveyor belt, conduct regular maintenance and upkeep to avoid paint peeling or jamming.

3. Reflux furnace temperature control: Control the stability of the reflux furnace temperature to avoid situations where it is too high or too low.

4. PCB preheating design: Conduct sufficient PCB preheating to avoid excessive acceleration and insufficient preheating time.

5. Control the amount of solder paste used during welding: It is not advisable to use too much solder paste to avoid board jamming caused by excessive solder paste.

If there is a card in the reflow soldering furnace, the following steps can be taken to solve it:

1. Do not send boards into the furnace again.

2. Open the furnace cover as soon as possible and remove the stuck board.

3. Check the cause of the blockage and take appropriate measures to resolve it.

4. Wait until the temperature meets the requirements before continuing welding.

In addition, if there is an alarm situation in the equipment, welding should be stopped immediately, the cause of the alarm should be checked in a timely manner, and then dealt with in a timely manner.