Cd Screen Printing Screen Plate Making Technology Process Xiang Jie - Cd-rom, Screen Printing -

CD Screen Print By Squeegee Pressure plate to ink scraping net transfer to the substrates

(CD surface), thereby forming ink graphic process, supported by wire mesh body, so essential to the production screen.

1 rational choice Stretching Tension Screen Printing

important parameter is the wire mesh, mesh wire diameter, wire thickness, hole size, and under the ink, screen diameter, mesh and wire mesh weaving methods and materials directly chosen Stretching tension affect the size, stretching the basis of these parameters on the screen when the tension test. Measurement of tension, the tension point should be measured from the Network box Position within the frame 10cm, or measure the tension is not accurate. Tension can be divided into the warp and woof of the tension, stretching through to the tension is when the entire volume of the tension wire winding direction; screen is the screen width of the weft direction of the tension on the tension. Tension of the size of the screen has a direct impact on the quality. The network version of high tension network with a lower distance, the printing process to use less pressure, reduce screen wear, longer life, less pressure also helps to avoid network surrounding AIDS ink, deformation, increase network edge sharpness to ensure the printing effect. When the net increase of 1 times the distance of time, will increase by 3 times the deformation of the printing graphics. Screen tension is low, and under the ink dot gain uneven deformation affecting hue. Screen uneven tension will cause uneven ink film thickness, pattern distorted text, local graphic fuzzy, network printing, so that deformation or dislocation and other outlets, resulting in Hue. But all kinds of wire mesh can withstand the maximum tension values are different, if the value exceeds a set maximum tension, screen will lose elasticity, known as plastic deformation or nets, the stretching should be attention.

2 network box of the proper use of

Screen frame materials, section size, shape and processed formation and intensity of such a direct impact on screen tension and tension stability. Network box on the stick before using the network perimeter to surface and burr processing. Repeated use of the screen frame to use acetone Solvent Cleaning, remove the screen frame surface residual ink Glue And screen debris. Stretching before the box on the network side pre-coated layer of sticky adhesive mesh network glue stick in the wire-line network Reapply when a layer of plastic, pay attention to glue to penetrate into the fitting screen surface side of the net hole, so that Screen fully bonded in the network box. When necessary, the glue is not completely dry, with plastic lamination pressure surface scratch, to help screen completely affixed firmly network box.

3 Stretching Method (1) Standard Stretching Method Torn off before the end of the first screen irregularly, such as quantity within the folder into the chuck, and pave the screen, and then clip the other end through to the screen, and finally to network folder folder zonal boundary, this time mesh tension-free.

Requirements will be pulled by the tension of the net value of 1 / 2, and then stretched weft, so that the tension of tension close to the required value at the same time, then adjust the zonal and meridional tension, so that all the required tension value static 10min, to fully release the stress. 10min after the adjustment of the tension of warp and weft tension to meet the requirement, still around 10min, so repeat the operation twice, and then brush Sensitive adhesive , Will stick in the network box on screen, complete the stretching process. This method is a widely used standard stretching methods.

(2) 30 Stretching Method Warp and weft direction of the first to meet the requirements of half of the tension, stability, about 1 ~ 2min after netting, so that increased tension required value of 80% to 90%, stop 5min, and then netting to make it to the required tension values of the tension about 10 ~ 15min after the re-stretched to the required tension value, repeat after the sticky net to complete the stretching.

In Stretching the process should pay attention to the following:

Stretching four-side of the chuck in the 3mm gap between the maximum allowed within the network so that all are subject to tension wire and wire mesh to ensure that the same force;

Stretching units to correspond to the side of the chuck to ensure that when the wire mesh in the Stretching nearly square, uniform tension throughout;

screen frame size according to the four corners of left side of the tensile proper margin, can minimize the possibility of screen tearing;

Stretching can be made 24h after the screen printing version, because of the high tension network version of the 24h, the tension will drop 10% to 20%, and the tension loss occurs mostly within the first 4h, and then gradually stabilized ;

Stretching Stretching by the angle can be divided into direct and oblique stretching. To make the edge of the printing line straight, smooth, does not produce jagged, plate-making process while avoiding the moire produced (net wire and dot interference patterns generated), Stretching, the mesh of latitude and longitude lines and network box corresponding to the edge was a certain angle, this method is called oblique stretching. Stretching the point of view there are several general angle of 15 , 22.5 , 45 , 7.5 , 30 and so on. This point of view of several Stretching, 22.5 from the edge of the line has good flatness and smoothness. 90 Stretching Stretching is straight, the line from the edge of the poorest quality.

4 net pre-treatment Grinding using a dedicated network of cream, degreasing agent based on the coarse mesh degreasing treatment, to increase the non-porous surface of the smooth surface and remove the oil, increase the screen size and the combination of photosensitive materials, photosensitive materials to improve wire-line adhesion, increase the number of screen printing resistance, reduce screen in the production process on the photosensitive layer of the pinhole.

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by: gaga

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