Some Abnormalities Of Flat Screen Printer


The five main elements of the fully automatic Stenter are: screen plate, squeegee, screen printing machine table, ink and materials

The five main elements of the fully automatic Stenter are: screen plate, squeegee, screen printing machine table, ink and materials; except for screen abnormalities caused by ambient temperature and humidity, other abnormalities can be dealt with by these five methods improve.
 
Screen parameters-(screen mesh parameters, screen tension, screen photosensitive adhesive thickness, screen tension angle) The number of screen meshes currently used in the touch screen industry is 150, 200, 300, 350, 420, 500. This product is mainly used on 15-30 micron thick printing film, with strong ink protection and degumming. The 300 mesh is mainly used for the filling process of mirror silver powder and products with a thickness of 7-10 microns (covering layer, etc.); 350 mesh and 420 mesh are mainly used for black and white and color printing. The film thickness is 4~7 microns, and the edge effect is obviously better than that of the low-layer film. Purpose 500 mesh is mainly used for printed products (3~5 microns thick film), the pattern effect is very good, and the lines are relatively fine. Other network parameters can also control the printing effect and film thickness, but due to time constraints, it is basically not used for ink abnormality treatment.
The screen parameters are mainly used to change the thickness of the ink layer.
 
Squeegee parameters-blade hardness and blade angle. Now, the hardness of industrial scrapers are: 60, 65, 70, 75, 80 and 85 degrees. Among them 60, 65, 70 degrees are mainly used for products that contain a lot of oil in the ink, such as mirror silver for sealing. Seventy and seventy-five degrees are mainly used for infrared ink printing, and eighty and eighty-five degrees are mainly used for black and white acrylic ink printing.
Abstract: The squeegee parameters are mainly used to improve the printing ink. The harder the blade, the more obvious the edge effect. The softer the squeegee, the thicker the printed film and the worse the edge printing effect.

Mechanical parameters-screen distance, printing speed, ink withdrawal speed, printing distance, etc.; the screen distance used in the touch screen industry is about 2~4 mm. For comparison graphics printing, the spacing between screens can be increased appropriately. The silver screen distance can be set to 1~2 mm for low viscosity mirrors.
Abstract: The mechanical parameter is mainly to adjust the printing effect of the ink. Such as edge effect, sticky screen and so on.
 
Ink parameters-adjust ink viscosity, add appropriate defoamer to prevent ink shrinkage, etc.; ink viscosity adjustment is generally done by adding diluent to the adjusted ink (decorative ink 5%~10%). Excessive ink viscosity can cause problems such as sticking of the screen, printing pinholes, and edge gaps. Too low ink viscosity will cause edge overflow, ink leakage, long teeth and other bad printing effects.
Abstract: Ink parameters mainly affect printing effect and ink layer thickness
 
The type of material and the cleanliness of the surface of the material. Material: Corning Glass, Asahi Glass, Longen Asahi Glass, Plate Nitrate, Central Nitrate, Luoyang Glass, etc.; Corning Glass, Asahi Saltpetre Blue and Long-Brand Asahi Saltpetre are currently widely used in industry.
 
The surface cleaning of the material is divided into one level. The process of Flat Screen Printer is not clean before printing, which can easily cause problems such as color difference and poor adhesion. When printing, the residual volatile ink will affect the cleanliness of the product surface and easily cause poor adhesion.