SMT Reflow Oven Manufacturing Factory

What is an SMT reflow oven?

An SMT reflow oven is a device that provides a heating environment to melt the solder paste so that the surface mount components and PCB pads can be reliably combined through the solder paste alloy.

How many types of SMT reflow ovens are there?

The main types of SMT reflow ovens include hot air reflow ovens, infrared reflow ovens, full hot air reflow ovens, nitrogen protection reflow ovens, etc. These types are suitable for different production needs and product characteristics according to their heating methods and process characteristics.

1. Hot air reflow oven: This reflow oven uses hot air to make the temperature in the oven more uniform, overcoming the local temperature difference and shielding effect of infrared reflow. Hot air reflow ovens are suitable for high-density assembly, which can ensure uniform temperature of PCBs and components and improve welding quality.

2. Infrared reflow oven: Infrared reflow ovens use the characteristics of strong infrared penetration, high heating efficiency and energy saving. However, due to the different absorption rates of infrared rays by different materials, uneven temperatures may occur. Infrared reflow ovens are suitable for joint heating of double-sided assembly substrates.

3. Full hot air reflow oven: The full hot air reflow oven forces air circulation through a convection jet nozzle or a heat-resistant fan to achieve heating of the welded parts. This method completely overcomes the local temperature difference problem of infrared reflow, but may cause jitter of the printed circuit board and displacement of components.

4. Nitrogen protection reflow oven: This reflow oven performs welding under nitrogen protection conditions to prevent oxidation and improve welding wetting ability. Nitrogen protection reflow oven is suitable for high-density assembly technology, can correct misaligned components, reduce solder beads, and is suitable for no-cleaning processes.

Main functions of reflow oven

The main function of the SMT reflow oven is to melt the solder paste by heating by providing a heating environment, thereby reliably combining the surface mount components and the PCB pads.

1. Preheating stage: Heat the PCB board evenly to activate the solder paste and avoid poor welding caused by rapid high-temperature heating.

2. Insulation stage: Ensure that the temperature of the PCB board and components is stable, the flux is fully volatilized, and bubbles are avoided during welding.

3. Reflow stage: The heater temperature rises to the highest, the component temperature rises quickly to the peak temperature, and the welding is completed.

4. Cooling stage: Solidify the solder joints to ensure the welding effect.

What are the precautions for SMT reflow ovens?

The main precautions for SMT reflow ovens include equipment maintenance, operation safety and daily maintenance.

Equipment maintenance

1. Daily cleaning: After the end of production every day, the reflow equipment should be thoroughly cleaned to keep the surface of the equipment free of dirt12.

2. Regular inspection: Regularly check the wear of components such as conveyor belts, heating elements, fans, transmission systems and temperature control equipment, and replace them as needed1.

3. Calibration parameters: Regularly calibrate the temperature and speed parameters of the reflow oven to ensure that the equipment can accurately control the temperature and adjust the conveyor belt speed according to the predetermined process requirements to ensure the quality and consistency of welding1.

Operation safety

1. Power off and exhaust: Before performing reflow oven maintenance, be sure to disconnect the power supply of the reflow oven, ensure that the reflow oven is completely stopped, and remove residual heat and exhaust3.

2. Wear protective equipment: During maintenance, technicians should wear appropriate personal protective equipment, such as heat-resistant gloves, safety glasses, work clothes, etc. 3.

3. Avoid touching hot surfaces: There are many high-temperature surfaces inside the reflow oven. Avoid touching them directly with your hands during maintenance to avoid burns 3.

4. Use appropriate tools: During the maintenance of the reflow oven, appropriate tools and equipment should be used to avoid touching or operating the equipment with fingers or other inappropriate tools 3.

5. Pay attention to the use of chemicals: If chemicals are required for maintenance, be sure to use them in a well-ventilated environment and use and store them in the correct way to avoid causing physical damage or polluting the environment 3.

Daily maintenance

1. Check power supply and grounding: Before starting up, check whether the power supply and grounding wires of the equipment are connected reliably to ensure safety 24.

2. Check the inside of the furnace cavity: Before starting up, check the furnace cavity to ensure that there are no foreign objects inside the equipment, especially when the induction timeout or a circuit board falls in the furnace, it should be cleaned and reset in time 45.

3. Regular maintenance and overhaul: Regularly inspect and maintain the various components of the equipment, especially the heating wire and conveyor belt, to ensure their normal operation4.

4. Pay attention to the hot air motor: When starting the reflow soldering, first check whether the sound of the hot air motor is abnormal, and ensure that the conveyor belt is normal during transportation and there is no derailment4.

By following these precautions, the normal operation and operational safety of the SMT reflow oven can be effectively guaranteed.

How to maintain the SMT reflow oven

The core content of SMT reflow oven maintenance includes regular cleaning, inspection and replacement of vulnerable parts, calibration of temperature and speed parameters, and regular maintenance and training of operators. These measures are essential to ensure production efficiency and quality.

First of all, regular cleaning is one of the basic steps in maintaining reflow soldering equipment. After the end of production every day, the equipment should be thoroughly cleaned to remove accumulated residues and dirt, especially in the conveyor belt, heating area and cooling area. In addition, it is also necessary to clean the inside of the furnace and the cooling zone pipes, which can be cleaned with an ultrasonic cleaner and a cleaning agent.

Secondly, inspection and replacement of vulnerable parts are also an important part of maintenance. Components such as conveyors, heating elements, fans, drive systems, and temperature control equipment need to be checked regularly for wear and replaced as needed.

Calibrating temperature and speed parameters is key to ensuring soldering quality. Regularly calibrate the temperature and speed parameters of the reflow oven to ensure that the equipment can accurately control the temperature according to the predetermined process requirements, and adjust the conveyor speed to ensure the quality and consistency of soldering.

In terms of personnel safety, the following points need to be noted when maintaining the reflow oven: power off and exhaust, ensure equipment cooling, use personal protective equipment, avoid touching hot surfaces, use appropriate tools, pay attention to chemical use, and receive training.

Finally, regular maintenance and operator training are also important parts of maintenance. In addition to daily maintenance, reflow ovens also require regular maintenance and overhaul, which may require professional technicians. At the same time, ensure that operators receive proper training and understand how to properly operate the equipment and perform daily maintenance tasks.

What are the consequences of improper maintenance of SMT reflow ovens?

Improper maintenance of SMT reflow ovens may lead to a variety of consequences, including equipment failure, reduced production efficiency, and product quality problems. These consequences will not only affect production progress, but may also have a negative impact on the quality and safety of products.

First, improper maintenance may lead to equipment failure. For example, if the temperature control system of the reflow soldering equipment fails, it may cause unstable temperature, which in turn affects the welding quality. In addition, if the chain and gears of the equipment lack proper lubrication and maintenance, it may cause the equipment to run poorly or even be damaged.

Secondly, improper maintenance can also lead to reduced production efficiency. For example, uneven temperature of the reflow soldering equipment may cause incomplete soldering, requiring re-soldering, thereby extending the production cycle. In addition, equipment failure may also cause production line shutdowns, further affecting production efficiency.

Finally, improper maintenance can have a serious impact on product quality. For example, inaccurate temperature control may cause soldering defects such as cold soldering and cold soldering, which may affect the electrical performance and reliability of the product. In addition, residues and moisture problems in the equipment may also cause unstable performance or failure of the product during use.

Why choose us to buy SMT reflow oven?

1. The company has hundreds of SMT reflow ovens in stock all year round, and both the equipment quality and the timeliness of delivery are guaranteed.

2. We have an expert technical team that can provide one-stop technical services such as relocation, repair, maintenance, software upgrades, and technical training of SMT reflow ovens.

3. Not only do we have new and original accessories in stock, we also have domestic accessories. We have our own factory to produce them, which has helped customers reduce operating costs and increase profit margins to a large extent.

4. Our technical team operates 24 hours a day and night shifts. For all technical problems encountered by SMT factories, engineers can be arranged to answer remotely at any time. For complex technical problems, senior engineers can also be sent to provide technical services on site.

In summary, the reflow oven is undoubtedly a very important equipment for SMT. When choosing similar suppliers, in addition to inventory and price advantages, special attention should be paid to whether the supplier has a professional technical team, which plays a vital role in the normal production of the equipment in the future.