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Why does the new rubber head sometimes appear oil phenomenon or can not pick the ink from the printing plate?l?
1. The compound ligand of the compound silicone oil and white ore oil should be added in the production process. When the made rubber head is placed for a period of time, the white ore oil will volatilize, so from the surface of the rubber head, it is recommended to dry it with a matching solvent.
2, if the surface of the rubber head will not be oil, you can use 1000 # sand paper to touch the oil and water in the rubber head surface polishing several times will also play a role.
3. The speed of the rubber head is too fast, and the rubber head has not fully absorbed the ink. It is recommended to slow the speed of the flow valve, or install the glue delay function on the machine, and the effect will be very significantly improved.
4, there is dust or oil on the surface of the substrate, if it is recommended to use white electric oil before the seal.
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How to determine the screen plate of the tension?
1. Screen plate has a great impact on the transmittance of ink, such as the tension below 25N / cm, which can not be printed in small outlets in the highlight area.
2, the tension to 5~10N / cm, fine outlets can be printed, by increasing the net distance to improve the tension of the screen plate is not desirable, increasing the net distance has the effect of improving the net plate tension, but increase the net distance, then increase the scraper pressure, the printing network will increase. Therefore, the method of increasing the net distance cannot be used to improve the tension of the network version, and the correct surface tension should be set when stretching the net.
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Why does the pattern on the printed product appear blurred by pad printer?
1. If the rubber head is too soft, the pattern will be distorted and blurred, and check whether the text pattern is too close to the edge of the moving rubber head.
2, the printing steel plate etching is too deep, normal is 25um, or the ink is too thin or too thick is not good, according to the thickness of the text more moderate concentration of ink.
3. Check whether the rubber flow valve is too fast and produces inertia, and the soft rubber head jitter caused by excessive impulse.
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How to adjust the screen printier machine's printing head?
1. The role of the scraper: the size of the printed ink volume not only depends on the pressure of the scraper, but also depends on the scraping Angle of the scraper and the layout, the hardness of the scraping plate, the scraping speed, the shape of the scraper blade mouth, etc.
2. Shape of scraper blade edge: there are as many as 7 kinds of shapes of scraper blade edge, and the commonly used ones are square mouth and round mouth. Fabric printing usually uses a round mouth scraper.
3. Cutting Angle: theoretically, 45 is the best, and the contact area between the blade and the layout is the smallest. But in the actual operation, the scraping Angle is greater than 45 Angle, some even reach 65~80 Angle, the common Angle is 75.
4. Master of scraper pressure and ink volume: the scraping pressure increases, the thickness of the ink layer also increases, mechanical scraping, and the scraper pressure is controlled and adjusted by special parts. Manual scraping mainly depends on printing experience, the pressure is too large, thick ink layer, the network eye adjustment level is deeper, 50% of the network angle is serious, 80% of the network into the field. The pressure is too small, the ink layer is thin, the dark level can be reproduced, and the high profile small outlets is lost. Only the pressure is moderate, the full stamping line is straight, the consistent pressure can print the color balance, rich levels of high quality printing.
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