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High-precision dual-servo flat screen printing machine
Basic structure
1. Vacuum suction workbench:

• The tabletop usually adopts a flat and sturdy aluminum alloy microporous suction workbench with good flatness to ensure that the substrate is placed stably. It is equipped with a complete vacuum channel and exhaust device inside, which can generate sufficient negative pressure. According to the material, size and other characteristics of the substrate, the adsorption force can be flexibly adjusted to firmly fix various flat substrates. Even thin and soft materials can remain motionless during the printing process, laying the foundation for high-precision printing.

2. Screen up and down servo system:

• It is mainly composed of high-precision servo motors and precision transmission mechanisms (such as screws, guide rails, etc.). The servo motor receives the command of the control system and accurately drives the screen printing plate to move up and down in the vertical direction. Its movement accuracy can reach millimeter level or even higher, and can accurately control the distance between the screen and the substrate.

3. Scraper left and right servo system:

• It also relies on high-precision servo motors and matching transmission components to operate, and can accurately control the horizontal movement of the scraper. It can not only accurately adjust the movement speed of the scraper, and the range can be set as needed, but also accurately adjust its starting position and travel range on the screen printing plate, ensuring that the scraper squeezes the ink from the graphic part of the screen plate to the substrate stably and evenly at the best angle and pressure, achieving high-quality printing effects.

4. Control system:

• With PLC (Programmable Logic Controller) as the core, it is equipped with an intuitive and easy-to-operate touch screen operation interface. Through this interface, operators can easily set various parameters in the screen up and down servo and scraper left and right servo systems, such as the lifting height of the screen, the movement speed and travel of the scraper, etc., and can also set the number of printings, printing modes (such as single printing, multiple overprinting, etc.).

Working Principle

    First, place the substrate on the vacuum suction workbench, turn on the vacuum suction function, and adjust the suction force according to the characteristics of the substrate to make it firmly fixed. The upper and lower servo systems of the screen drive the screen to descend to a suitable distance from the substrate. At the same time, the left and right servo systems of the scraper drive the scraper to move on the screen according to the set speed, angle and stroke, squeezing the ink from the image part of the screen onto the substrate to complete one printing. The ink return plate operates synchronously to make the ink evenly distributed. If there is a need for multiple printings, repeat the above printing steps, and finally the substrate is sent out after printing. The whole process can be circulated to achieve continuous production operations.

Features and Advantages

1. High printing accuracy: The coordination of the upper and lower servos of the screen and the left and right servos of the scraper, coupled with the stable fixation of the substrate by the vacuum suction workbench, makes the positioning and operation of each link in the printing process extremely accurate, and can print clear, colorful and accurate color patterns on flat substrates, meeting the printing needs of products with strict requirements on printing quality, such as high-end electronic product shells, exquisite gift packaging, etc.

2. High operational flexibility: The control system can easily adjust the parameters of each servo system, and can flexibly change the printing mode, parameter settings, etc. according to the characteristics of different substrate materials, sizes and printing patterns, to adapt to diverse production needs, and can cope with both small and large-format printing tasks.

3. Wide range of applications: The vacuum suction workbench can absorb flat substrates of various materials (such as paper, plastic, metal, glass, etc.). Combined with the flexibly adjustable servo system and screen printing plate, it can achieve high-quality screen printing of flat substrates of different materials, sizes and shapes, and has strong versatility.

4. Good stability: The overall structure of the equipment is reasonable, and each system works together under precise servo control, reducing the probability of failures caused by factors such as wear of mechanical parts and human operating errors. The operation is stable and reliable, and can carry out screen printing production stably for a long time, ensuring the continuity of production and consistency of product quality.

5. Efficient production: The precise control of the servo system makes the printing process smooth and the speed can be flexibly adjusted. Compared with traditional screen printing machines, it can effectively improve production efficiency. It is especially suitable for batch production operations, which helps to reduce unit production costs and improve production benefits.