How to Adjust Speed and Angle of the Screen Printing Machine's Squeegee

2025-07-18

Screen printing squeegee is one of the common tools in screen printing process. The angle of the screen printing squeegee plays a crucial role in the printing effect. An appropriate squeegee angle can ensure that the ink is evenly applied to the screen printing screens, resulting in clear and stable printing results. The selection of the appropriate squeegee rubber angle and the method for adjusting the squeegee rubber angle can be determined based on specific requirements and printing processes. In actual operation, the suitable squeegee rubber angle needs to be chosen according to the type of ink, the characteristics of the screen printing screens, and the printing requirements to ensure the quality and effect of the printing.

The setting of screen printing squeegee angle is related to the ink; the higher the viscosity value of the ink, the poorer the fluidity, the higher the downward pressure of the squeegee on the ink, and the smaller the angle of the squeegee. The range of adjustment of squeegee angle is 45°~75°. In the printing process, the squeegee edge 2~3mnmn area plays a key role. In the printing pressure, squeegee and screen begin to rub. The printing approximate straight line at the beginning and the squeegee edge of the screen local pressure is very large. With the wear of screen printing squeegee edge, the shape of the edge is rounded. It is a sharp increase in the direction of the ink to the screen direction of the force, at the same time, the role of the screen in the screen unit area of the pressure is significantly reduced, the actual angle between the squeegee edge and the screen is far less than 45°. After printing the screen surface will have residual ink, easy to leakage, while the edges of the lines of the printed play fuzzy, then you need to replace the squeegee.

In the screen printing process, the screen printing squeegee is subjected to downward pressure, the squeegee produces deformation, and the contact position with the product to produce changes. Increasing the angle of the screen printing squeegee generally leads to an increase in the amount of ink. Vice versa, if the angle is very small, the ink can not pass through the mesh. In the case of tilting 30 degrees, scraping is still the blade surface contact products, blade surface support is good, high hardness. The printing process will scrape away the excess ink, so that the ink leaked down through the mesh less, resulting in a thin film thickness, printing some high-definition, fine lines of the pattern effect is better.

And tilt 45 degrees large angle, scraper deformation is serious, scraper and product contact becomes a knife side plane contact product, this state of scraper support, hardness decline, and product contact surface is large, can not quickly scrape away excess ink, so that the ink through the mesh leakage of the product surface, resulting in a thicker film thickness.However, this state will also lead to uneven film thickness on the whole coating surface.

The flat squeegee angle is a 90 degree angle between the screen printing squeegee and the printing stencil. It is suitable for more viscous ink and rougher surface of the printing template. Under this angle, screen printing squeegee can evenly spread the ink on the template, suitable for printing a larger area of the pattern. Oblique squeegee angle means that the angle between the screen printing squeegee and the printing template is less than 90 degrees. Applicable to thinner ink and more flat surface of the printing template. This angle, the screen printing squeegee can better control the amount of ink coating, suitable for printing more delicate patterns.

Screen printing squeegee speed is one of the factors determining the efficiency. Printing speed is determined by the printing graphics and printing ink viscosity. The higher the speed, the screen printing squeegee driven ink into the screen leakage holes of the shorter the time, the poorer the filling of the paste. If the printing line is fine, the speed should be lower. Printing with different processes and different ink, the corresponding viscosity is different, but the overall viscosity is relatively low, so the printing speed is faster. In the actual printing of the speed of the constant is also very important. If the speed fluctuates in the printing process, that will lead to inconsistent thickness of the graphics.