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SMT Punching basic process: Solder Paste Printing,SMT Mounting, Reflow Soldering, Cleaning, Inspection.
1.Solder Paste Printing: Its role is to print solder paste or splicing glue onto the PCB pads to prepare for component soldering.The equipment used is silk screen printing machine (screen printing machine), located in the forefront of the SMT production line.
2.SMT mounting: its role is to accurately mount the surface assembly components to the PCB's fixed position.The equipment used is a punch machine, located in the SMT production line behind the silk screen printing machine.
3.Reflow soldering: its role is to melt the solder paste,so that the surface assembly components and PCB firmly bonded together.The equipment used is a reflow soldering furnace,located in the SMT production line in the back of the beating machine.
4.PCBA cleaning: its role is to assemble the PCB board above the harmful welding residues such as flux removed.The equipment used for the cleaning machine, the location can not be fixed,can be on-line, but also not on-line.
5.PCBA inspection: its role is to assemble the PCB board for welding quality and assembly quality inspection.The equipment used are magnifying glass, microscope,in-line tester (ICT),flying probe tester,automatic optical inspection (AOI), X-RAY inspection system, functional testers and so on.The location can be put aside in a suitable place in the production line according to the need of inspection.
SMT Punching Factory
Advantages of SMT
1.High assembly density,light weight and small size of electronic products.The volume of the component is only about 1/10 of the volume of the traditional inserted components,generally SMT after processing, the volume of the electronic product is reduced by 40% to 60%.
2.Strong vibration resistance and high reliability.As electronic components are short pins or no pins,and firmly mounted on the surface of the PCB,the vibration resistance of SMT parts is strong,high reliability.SMT playing parts of the defective rate of the solder joints than THT lower than an order of magnitude.
3.Good high-frequency characteristics.As electronic components to reduce the impact of the distribution characteristics of the lead,and in the PCB surface soldering firm,greatly reducing the lead between the parasitic inductance and parasitic capacitance,which reduces the radio frequency interference and electromagnetic interference to a large extent, improving the high-frequency characteristics.
4.Improve production efficiency,easy to achieve automation.SMT is suitable for automated production,SMT only use a piece of machine,put aside different paste put head and material frame,you can install all types of electronic components, reducing the maintenance workload and adjust the preparation time.
5.Cost reduction. SMT playing pieces of PCB wiring density increases,the area becomes smaller, the number of drilled holes to reduce the number of layers of the same function of the PCB to reduce the cost of these PCB manufacturing. Short lead or no lead components to save the lead data,omit the bending,cutting process, reducing manpower, equipment costs.Improvement of frequency characteristics reduces RF commissioning costs. Reduced volume and weight of electronic products reduces the cost of the whole machine.Welding reliability is good, so that the cost of rework is reduced.In this way,the general electronic products after the use of SMT, can make the total cost of the product to reduce 30% -50%.
IPCB provides you with one-stop PCBA service from PCB circuit board design,PCB fabrication,PCBA processing,SMT playing pieces,circuit board soldering,PCBA material substitution,etc.,so that you can save time and energy, production costs and committed to the research and development of new products and sales.