Various influencing factors of control screen printing process, to improve screen printing precision

Control various influencing factors of screen printing process, improve screen printing precision

in screen printing graphics processing course, begin to request printed material performance is excellent, the second must be strict control set printing equipment deployment, tooling, scraping board, network distance, pressure and other technological factors.

　　1. Printing material must meet the following performance:

good chemical stability; The drying rate fitting for; To apply the copper foil board adhesive performance is good; Viscosity conform to, good thixotropy, color in accordance with;

telegraphing force; Easy to dry.

　　2. Set equipment deployment tooling

accept printing precision screen printing press can remove many unstable factors, positioning jig can directly use the machine surface longitudinal adjustable positioning pin positioning.

　　3. Other technological factors

scraping board, scraping board width, hardness, Angle, edge status and network distance, scrapping printing pressure is very important, should choose polyester rubber scraper. Scraper width is proper, too wide of the graphic distortion, scraper hardness most in shore A60 & ndash; — Within 80 category, printing the perfect Angle to 20 & ndash; — 30, must often link flat sharp edge. Net from the same usually 2 & ndash; — 4 mm and the screen is parallel to the mesa, scrapping printing pressure to print out clear graphics is advisable.

to sum up the above process factors, the important factor affected the accuracy of line graphic picture to cover printing material, scraping board hardness, edge condition, printing pressure and Angle etc, deployment and screen printing equipment, tooling, net and scraper width influence factors including the position of the printing and graphic precision, high quality screen stencil is printing precision shall be no less progress.