At present, there are many companies for silk screen printing, and there are many screen printing machinery and equipment, but one problem that plagues many people is the problem of precision of this overprint. How screen printing improves the accuracy of overprinting is the goal that every screen printing worker pursues.
One: to improve the accuracy of silk screen multi-color overprinting, first consider two aspects:
1. It is to consider the production quality of the screen and the accuracy of the screen. This is the key.
2, is the positioning control when silk screen printing. Screen printing positioning, not explained in detail here, will be published later.
Two: So today we will discuss "How to ensure the accuracy of silk screen printing?"
1. Selection on the frame material - this is the basis
For the selection of frame materials, LY12, LF2 and other high-alloy alloy aluminum square tube profiles are generally used, and the specification is 20mm wide.
Thick 20mm, thickness up to 2mm up and down, if necessary, special reinforcement type aluminum alloy material, Japanese type, Tian type
And cross-type these specifications. The four corners are processed by argon arc welding. In this case, the frame has high strength, good stability and fineness.
The degree is naturally high.
2. Selection of wire mesh material
Currently used most are nylon mesh and polyester mesh. Nylon mesh has poor heat resistance, and it is easy to produce thermoplastic deformation after being heated, which makes the tension uneven and
affects the quality of screen printing. Polyester mesh has good heat resistance and dimensional stability, and the pattern does not change greatly due to changes in temperature and humidity. In order to ensure the accuracy of screen printing graphics, it is best to use monofilament polyester mesh. At the same time, the screen with higher mesh size, thinner wire diameter and smaller mesh should be used. The color of the mesh is yellow or brown, and the pattern will not be dizzy.
3. Stretching equipment:
Stretching net is an unavoidable link. To produce high-precision printed graphics, firstly, the stretch net is required to meet the quality requirements. It is best to use a pneumatic stretcher. The quality requirements of the stretch net are as follows: the tension of the stretcher is suitable and uniform; The vertical and longitude of the latitude and longitude, the wire diameter should not be curved.
The introduction of screen printing mesh to improve the color registration accuracy is above, I hope to be helpful to everyone.
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