A screen printing frame is a tool commonly used in the field of screen printing; it consists of a metal framework and a mesh screen stretched over it. The mesh is typically made of nylon fibers or metal wire, with mesh sizes selected according to specific requirements.
A screen printing frame generally comprises three components: the frame, the mesh screen, and the coating adhesive.
Frame: The frame is a crucial component, usually constructed from metal materials such as aluminum alloy or steel. It must possess sufficient rigidity and stability to ensure printing precision.
Mesh Screen: The mesh screen is the part stretched over the frame; it consists of a fine mesh made from metal wire, nylon fibers, or other synthetic materials. The mesh size is determined by specific needs, and the quality of the mesh directly impacts the final print quality.
Coating Adhesive: To ensure close contact between the mesh and the printing substrate, a layer of adhesive is often applied to the mesh surface. This adhesive layer facilitates the transfer process between the screen and the substrate, ensuring print uniformity and precision.
Screen printing technology is based on the principle of using a "printing plate" (the screen itself). It relies on contact between the mesh and the substrate; by adjusting the pressure between the substrate and the screen, the image on the screen is transferred onto the printing material.
The working principle of the screen printing frame is as follows: a printing plate is created based on the desired pattern, and a light-blocking emulsion (or coating) is applied to the screen; prior to printing, the substrate is placed on the printing bed, and the screen printing frame is positioned over it; after applying the printing ink, a squeegee is used to remove excess ink from the screen, thereby completing the printing process.