Section outline
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- Screen production is also undergoing changes in line with new developmental trends in textile printing technology. Demands on quality, but also environmental and economic sustainability require the development of new, more durable materials for flat-screen meshes, in order to withstand a larger number of prints and different designs, thus reducing the amount of mesh waste.
- In this topic, the basic design parameters of flatbed and rotary printing screens will be explained. The method of their production, types of materials for making screens will be presented and the marking of their fineness will be defined.
- Also, the fundamental mecahnisms of hydrodinamic pressure in the paste wedge and printing paste flow will be presented.
In this Topic, following chapters are included:
- Flat screen preparation
- Fineness of the screen (mesh)
- Rotary screens preparation
- The amount of paste printed onto material, flow and print mechanism
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FLAT SCREEN Production
The printing screen or mesh must be attached to the frame under a certain tension. The optimal tension of the screen mesh is directly influencing on the later quality of the stencil (pattern developing), which implies a satisfactory sharpness of the pattern contour. In smaller productions, a machine for manual screen streching is used, while in industrial processes and large scale production, tables with pneumatic streching are used. You can see both on videos.
MANUAL Streching
PNEUMATIC Streching
FINENESS of Screen