In the SMT processing factory, SMT is a complex and comprehensive system engineering technology, involving PCB boards, components, process materials, automatic precision assembly in SMT processing, solder joint testing equipment and other factors. Among them, the SMT production equipment is a high-precision mechatronics equipment. The solder paste and patch glue in the SMT process material are high-temperature thixotropic fluids, and they have certain requirements for the cleanliness, humidity and temperature of the environment. Companies that need OEM materials can go to the SMT chip processing factory to visit and inspect the specific production environment. The processing environment can directly affect the product quality. A reliable SMT chip processing factory will pay attention to every detail in production, and environmental factors are one of the control details. In order to ensure the normal operation of the equipment and the welding quality of the products, the Shenzhen SMT chip processing manufacturer shenzhen 1942 will introduce to you, what are the environmental requirements of the SMT processing factory for the workshop?
1. The production workshop of the SMT chip processing factory should be kept clean and hygienic, free of dust (including no dust impurities on the ground, equipment surface and interior.) The air cleanliness is 100 000 grades (BGJ73-84).
2. The best ambient temperature in the production workshop is (25±3)℃, generally 22℃~28℃, and the limit temperature is 20℃~30℃.
3. If the relative humidity in the air in the production workshop is too high, it is easy to cause defects such as tin beads and solder splashes after welding; if the relative humidity is too low, it will cause the solvent in the flux to volatilize, and it is easy to generate static electricity, resulting in a series of defects. Therefore, the relative humidity should be controlled within the range of 45% to 70%. In view of the above requirements for the SMT chip processing production environment, the general production workshop should be equipped with air conditioners, and a certain amount of fresh air is required to ensure human health.
4. The production workshop generally requires single-phase AC220 (220±10%), three-phase AC380 (380±10%), and a voltage stabilizer should be equipped at the equipment side to keep the equipment running stably.
5. According to the use requirements of the equipment, the workshop should be equipped with a certain pressure air source, and the compressed air compressor is generally placed outside the workshop. The general pressure is 5kg/c㎡. It is required to increase the filtration and purification of the gas to ensure that the gas is free of oil, dust and water, and use stainless steel or high-pressure pipe as the gas pipeline.
6. Reflow soldering equipment and wave soldering equipment need to be equipped with an exhaust system, and the minimum flow value of the exhaust duct is 500 cubic feet/min (14.15m³/min).
7. Workers need to wear anti-static clothing and shoes when entering the workshop, and they need to wear electrostatic wristbands when they come into contact with products. The work area should be equipped with anti-static floors, static wires, anti-static seating tables, anti-static packaging bags, turnover boxes, and PCB racks.
#Shenzhen 1942 PCBA factory #PCBsmanufacturer# PCB machine #SMT China #1942 SMT factory# Shenzhen PCB manufacturing
2022-12-08
