One: To improve the accuracy of multi-color overprinting of silk screen printing, first consider two aspects:
1. It is the key to consider the production quality of the screen version and the accuracy of the screen version.
2. It is the positioning control during silk screen printing. Screen printing positioning, I will not explain it in detail here, and related articles will be launched later.
Two: So today we will discuss "how to ensure the accuracy of screen printing?"
1. The choice of frame material - this is the basis
The selection of screen frame materials is generally made of LY12, LF2 and other high-quality alloy aluminum square tube profiles. The specifications are 20mm wide, 20mm thick, and up to 2mm thick. When necessary, special reinforced aluminum alloy materials can be used. Font and cross type of these specifications. The four corners are processed by argon arc welding. In this case, the frame has high strength, good stability, and naturally high precision.
2. Selection of wire Mesh material
At present, the most commonly used are nylon wire Mesh and polyester wire Mesh. Nylon Mesh has poor heat resistance, and is prone to thermoplastic deformation after being heated, which makes the tension uneven and affects the quality of screen printing. Polyester Mesh has good heat resistance, stable size, and the graphics do 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 screen. At the same time, the wire Mesh with higher Mesh number, smaller wire diameter and smaller Mesh should be used.
3. Equipment for stretching the net:
Stretching the net is a link that cannot be ignored. To produce high-precision printed graphics, the stretched net must first meet the quality requirements. It is best to use a pneumatic stretcher. The quality requirements of the stretched net are as follows: the stretched net tension is appropriate and uniform; The longitude and latitude are vertical, and the wire diameter should not be curved.
The above is the key step of "screen printing to improve color registration accuracy", we are close to high-precision screen printing.
