1. Standard stretching steps of screen printing mesh:
The screen mesh can stretch to the desired tension value in 1-3 minutes, but before the screen is fixed to the frame, it must wait for more than 15 minutes, and then increase the tension to the final desired tension value. Repeating several times will reduce future tension loss.
If you stay in the mesh after 5 minutes when stretching well, the tension loss is over 28%.
If the mesh is stuck after 15 minutes when stretching well, the tension loss is 15%-20%.
If you stick the mesh after 30 minutes when stretching well, the tension loss is 10%.
The above tension loss refers to the tension loss when the mesh is attached and just pulled, and the tension loss value after 24 hours of sticking to the mesh. Generally, the overprinted screen version requires a minimum of 24 hours to re-print after the mesh is pulled, otherwise there will be inaccurate overprinting or line deformation.
After the mesh is stretched, the screen is fixed to the frame and the tension is determined by the stretch resistance of the screen. The tension of the screen is an important factor in ensuring accurate overprinting and determining the proper web spacing.
In general, the higher the mesh size, the finer the mesh, and the thicker mesh is pulled tighter than the fine mesh.
According to the stretcher program, the tension loss of the standard screen is 15*20%, and the tension loss of the PET1000 screen is 10-12.5%.
2. If the tension loss of the screen printing mesh is serious, you should know the factors that makes the following trouble:
The aluminum used in the frame is very weak and cannot withstand large tensions.
The method of placing the wire into the head is improper, and the tension on the four sides is inconsistent.
The edge of the mesh clamp is uneven, and the frame is not flat.
There is not enough time to wait before sticking the net.
Hope this article can help us know more details of the screen printing mesh
Previous:Stainless Steel Printing Mesh