PCB Technical - Commonly used machinery and uses for pcba processing

Commonly used machines for PCBA processing include printing machines, glue dispensers, placement machines, reflow soldering machines, testing equipment, rework equipment, and cleaning equipment. PCBA processing is an electronic processing industry with a relatively high degree of mechanical integration.

PCBA processing is an electronic processing industry with a relatively high degree of mechanical integration. The use of more and more mature processing machinery and the improvement of manufacturing processes have continuously improved the yield and efficiency of PCBA processed products. The commonly used processing machinery in PCBA processing has the following types

Printing machine

The printer is located at the front end of the PCBA processing line, and its main purpose is to print solder paste or patch glue on PCB circuit boards. The working process is that after the mesh of the stencil of the printing machine is aligned with the PCB pad, the solder paste or patch glue placed on the stencil is printed on the PCB pad or the corresponding position through the movement of the squeegee for PCBA processing Prepare for component placement in the subsequent process.

Dispenser

The main purpose of the dispenser is to apply solder paste or patch glue. The working process is to apply a prescribed amount of glue or solder paste on the required position of the PCBA device through the pressure of the vacuum pump. The advantage of the dispenser is that during the production process, there is no need to replace the production jig, which greatly shortens the production cycle and is suitable for small batch and multi-product production.

Mounter

The placement machine is the core mechanical equipment in PCBA processing, also called the placement machine. The main purpose is to accurately remove the known material from the specified location through the pre-set conditions, and correctly mount it to the specified location. The placement and production capacity of PCBA processing mainly depends on the speed and accuracy of the placement machine and other functional parameters. It is also the most technical, complex and expensive equipment in the PCBA process.

The automatic placement machine is a high-speed, high-precision, highly automated, and highly intelligent equipment integrating precision machinery, electric, pneumatic, optics, computers, and sensor technology.

Reflow soldering machine

The main purpose is to provide a stable and controllable heating environment to fuse the solder pre-allocated by the printer on the PCB circuit board, so that the surface mount components and the PCB pad can be reliably combined with the solder paste.

Testing Equipment

X-ray detector

The main function of the inspection equipment is to inspect the assembly quality and street quality of the mounted PCBA. The equipment used mainly includes a magnifying glass, a microscope, an automatic optical detector, an online tester, an X-ray inspection system, and a functional tester. According to the needs of testing, its installation position is the corresponding position behind the production line.

Repair equipment

BGA rework station

The main function of the rework equipment is to rework and repair the PCBA finished products that have detected faults. The tools used are soldering irons, BGA rework stations, etc.

Cleaning equipment

Ultrasonic cleaning machine

The function of the cleaning equipment is to remove the substances that affect the electrical properties of the processed PCBA products or the welding residues that are harmful to the human body, such as flux. If you use no-clean solder, you do not need to clean. The equipment used for cleaning is an ultrasonic cleaner and a special cleaning fluid (washing water: the washing water is a highly volatile flammable liquid, pay attention to safe use).