Flat screen printer is a type of screen printing equipment that prints solder paste or patch glue onto the PCB pads through the screen. It has the functions of high efficiency, environmental protection, and energy-saving. It can be divided into vertical flat screen printer, inclined arm flat screen printer, turntable flat screen printer, four-post flat screen printer, and automatic flat screen printer. Mainly used in the electronic processing industry, printed circuit board silkscreen logo, instrument shell panel logo, solder paste printing in the process of circuit board processing, etc. So what issues should be paid attention to before turning on the flat screen printer?
1. The flat screen printer must be cleaned when it is in use. After cleaning, the flat screen printer can be used better, avoiding the problem of dust causing corrosion to the machine, and extending the service life. The inside of the flat screen printer must be in a normal state, and there must be no foreign objects, otherwise, it will definitely cause obstacles. Only when it is in a normal state can it be used better.
2. Turn on the power switch on the operation panel of the flat screen printer, the touch screen will start to work. At the same time, place the screen printing template in the arm plate seat and slightly fix it with the knob to facilitate subsequent adjustment of the screen printing template. After starting the hand for about three minutes, the pressure of the street oil storage tank reaches 4, and the exhaust valve on the air compressor can be opened. The valve stem is closed when it is perpendicular to the air pipe, and it opens when the valve stem is parallel to the air pipe. Driven by compressed air, the arm plate seat of the sieve plate holder will rise to the upper limit position to stop.
3. Select the jog function, select the placement position, and then the arm plate holder is lowered to the top of the printed circuit board honeycomb fixing table. At this time, according to the position of the backing plate on the flat screen printer template, determine the fixed printed circuit board on the honeycomb fixing table. Approximate location. After determining the approximate fixed position of the printed circuit board, first, rise in the middle to lift the arm steel plate seat to the upper limit position, and then use the thimble to place the printed circuit board on the honeycomb fixing table.
4. In order to increase and improve the bonding strength between the printing material and the substrate, the screen-printed surface of the substrate should be consciously processed. The surface of the substrate should not be processed (including removing dust) before the screen printing. Some substrates require The purpose of the treatment before the silkscreen is to improve the adhesion between the printed material and the substrate, and the treatment after the silkscreen should be increased to meet the requirements. The corresponding processing method is adopted according to the different substrate materials.