Screw valve solder paste application and operation guide

  I. Application Scenarios of Screw Valve Solder Paste Dispensing

Screw Valve Solder paste dispensing technology is mainly used in precision dispensing operations on SMT (Surface Mount Technology) production lines, including but not limited to the following aspects:

1. Integrated Circuit Board Soldering: Precisely dispensing solder paste onto integrated circuit boards to provide a uniform and stable soldering medium for subsequent chip soldering.

2. Micro-component Fixation: For tiny electronic components such as chips, resistors, and capacitors, the screw valve is used to dispense a small amount of solder paste to ensure that the components are firmly connected.

3. High-Density Interconnection Boards: In the manufacturing of high-density interconnection boards, the high-precision characteristics of the screw valve are used to achieve solder paste dispensing for complex circuit patterns, improving product reliability and stability.

4. Dispensing Irregular Components: For components with irregular shapes, the screw valve can flexibly adjust the dispensing path and amount to meet personalized dispensing needs.

II. Screw Valve Equipment Selection

Selecting the right screw valve equipment is crucial for ensuring solder paste dispensing quality. The following factors should be considered:

1. Precision and Repeatability: According to product precision requirements, select a screw valve with high precision and good repeatability to ensure consistency in each dispensing.

2. Dispensing Volume Control: According to the component size and welding needs, select a screw valve with adjustable dispensing volume to achieve precise control of solder paste from micro to large amounts.

3. Compatibility and Adaptability: Ensure that the selected screw valve is compatible with existing production line equipment, including the control system and feeding system, to reduce modification costs and complexity.

4. Maintenance and Service: Choose a supplier with good After-sale Service and Powered by to facilitate daily maintenance and troubleshooting of the equipment.

III. Operating Procedures

1. Preparation:

- Check if the screw valve and auxiliary equipment (such as the solder paste feeding system and control system) are intact, and clean the workbench.

- According to process requirements, select the appropriate solder paste and preheat it to the recommended temperature to ensure good solder paste fluidity.

- Program the dispensing path, dispensing volume, speed, and other parameters, and conduct simulation tests if necessary.

2. Equipment Debugging:

- Start the equipment and run it without load to check if the screw valve movement is smooth and without any jams.

- Conduct a small amount of test dispensing to observe whether the solder paste dispensing shape meets expectations, and adjust the parameters until the optimal state is reached.

3. Formal Operation:

- Place the circuit board to be dispensed in the designated position and start the automatic dispensing program.

- Monitor the dispensing process, paying attention to whether the uniformity, position, and amount of solder paste dispensing meet the design requirements.

- Regularly check the solder paste supply and replenish it in time to avoid production interruptions.

4. Finishing Work:

- After dispensing is complete, turn off the equipment power, clean the work area, especially the screw valve head and feeding system, to prevent solder paste solidification and blockage.

- Record the equipment operating status and dispensing quality for future production reference.

IV. Maintenance

1. Daily Cleaning: After each use, promptly clean the screw valve head and feeding system to prevent solder paste residue from causing blockage or corrosion.

2. Regular Inspection: Conduct a comprehensive inspection at least once a month, including electrical connections and mechanical part wear and tear, and replace worn parts in time.

3. Lubrication and Maintenance: Lubricate the moving parts of the screw valve appropriately to ensure smooth operation.

4. Calibration and Adjustment: Regularly calibrate the dispensing accuracy to ensure long-term operational accuracy.

In summary, Screw valve solder paste dispensing technology plays an important role in the electronics manufacturing industry due to its high precision and high efficiency. Through reasonable equipment selection, standardized operating procedures, and meticulous maintenance, the dispensing quality can be significantly improved, ensuring the stability and reliability of product production. It is hoped that this article will provide valuable reference for relevant practitioners, helping to improve production efficiency and product quality.