Screen plate UV exposure machine

 Working principle

• Exposure part: The high-precision and low-cost screen exposure machine mainly uses ultraviolet rays emitted by metal halide UV lamps for exposure. When the exposure program is turned on, the UV lamp emits ultraviolet rays in a specific wavelength range, which pass through the vacuum rubber cloth and the photosensitive material on the screen. The function of the vacuum rubber cloth is to make the screen fit closely with the film to prevent light leakage and ensure the accuracy of exposure. Under the irradiation of ultraviolet rays, the photosensitive material on the screen undergoes a photochemical reaction, so that the part of the photosensitive material not blocked by the film is solidified, while the part blocked by the film remains the same. After subsequent development and other treatments, a screen with a pattern can be formed.

• Operation part: Through the key panel operation, it is convenient to set parameters such as exposure time and UV lamp power. The operator can accurately control the exposure process according to the type of screen, the characteristics of the photosensitive material and the requirements of the pattern.

• Frame part: The galvanized sheet frame mainly plays the role of supporting and fixing other components. It provides a stable installation foundation for components such as UV lamps, vacuum rubber cloths, and key panels, ensuring the stability of the entire exposure machine during operation and reducing exposure errors caused by factors such as vibration.

Application scenarios

• Printing industry: widely used in the field of screen printing, used to make various printing screens, such as advertising printing, textile printing, electronic circuit board printing, etc. For example, when making screens for advertising posters, the design pattern can be accurately transferred to the screen through the exposure machine, thereby achieving high-quality printing.

• Electronics industry: used to make printed circuit board (PCB) screens for electronic components. During the PCB manufacturing process, high-precision exposure machines can ensure the accuracy and clarity of circuit patterns and improve the quality of electronic products.

Advantages

• High precision: The vacuum rubber cloth ensures the close fit between the screen and the film, and the precise UV light exposure can produce high-precision screens to ensure the fineness and accuracy of the printed pattern or circuit pattern.

• Low cost: On the basis of meeting the basic needs of screen production, the cost of the equipment is reduced through reasonable design and component selection. It is suitable for small printing companies or electronic manufacturing companies, which helps to reduce production costs.

• Easy operation: The key panel operation makes parameter setting simple and clear. The operator can easily control the exposure process without complex operating skills, which improves work efficiency.

     In the process of making the screen, it is a very important process to transfer the pattern on the film to the screen printing plate coated with photosensitive adhesive, which is done by the printing machine. The working table of the plate printing machine is transparent glass, and the glass is under the UV lamp tube. When printing the plate, the plate negative film is attached to the screen surface and placed on the table, and the blanket will only press the negative film and the screen plate tightly. , Since the printing negative has black graphic area and transparent area, UV light will pass through the transparent area and be blocked by the graphic area, and the photosensitive adhesive on the screen will appear in exposed and non-exposed areas, and then in the process of processing to make the final Net version.