Rotating plain screen printing machine.mp4

5 year ago

74 0 

9 year

Product details

Machine panel Flat screen printing machine with conveyor

Turntable screen printing machine is an important type of transition from semi-automatic flat screen printing machine to automatic flat screen printing machine. By upgrading the workbench to a structure that can be rotated and alternately conveyed, the degree of automation of the flat screen printing machine has been improved. The turntable table can be set to 4, 6, 8 or more stations ensure the continuous delivery of products and reduce the waste of time during product printing. After the turntable screen printing machine is equipped with a manipulator, the printed product can be grabbed to the IR drying oven or the conveyor belt of the drying oven to realize a relatively automated production line, which is also a trend of today's screen printing machines. The elements of the rotary screen printing machine include:

Screen printing ink, the type of ink is selected according to the material of the product, and the color is selected according to the color required by the design. Whether it is an ink of a famous foreign brand or a domestic brand, as long as it meets the customer's requirements after testing, it can be delivered.

Screen printing jigs: Turntable screen printing machines usually need to make the same number of jigs as the number of workstations, and the uniformity and interchangeability of the jigs are better.

Screen printing screen: The screen printing screen should be made according to the printing pattern provided by the user. You can hand it over to a third party or make it yourself.

Screen printing squeegee: Screen printing squeegee is usually a rubber tool made of polyurethane material with a rectangular or triangular or even more complex cross-sectional shape. It is in close contact with the screen and squeezes the ink onto the product surface through angle and pressure.

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- Installed in the flat screen printing machine on the basis of a 10-station conveyors, one can fixture 10 products for printing,;
- Saving makeready times, improved work efficiency, suitable for flat small monochrome printing area less than 80mm × 110mmscreen printing;
- The structural design using the up and down movement of the screen plate type, conducive removed and placed;
- Horizontal cylinder design a stable, uniform squeegee pressure back and flat, good print quality;
- Semi-automatic operation, the operator interface can be used;

Machine panel Flat screen printing Machine with Rotating table //Parameters

The max printing thickness: 200 MM;
Air consumption: 75 Lit/Min;
Outline size: 1080×850×1280MM;
The max printing area : 180×250MM;
Dimension of working table:200mm×300mm;

Max printing speed: 1800Pc/H;
Max frame dimension: 550×350mm;
Stroke of Squeegee: 250mm;
Stroke of Table cylinder: 200mm;
Number of working table: 4

The main structure of the turntable screen printer:

Turntable worktable system

Divider: such as the cam divider, which converts the continuous rotation of the motor into intermittent motion, so that the turntable can achieve precise indexing and positioning, ensuring the accuracy of each station.

• Turntable: Usually circular, it is a carrier for placing the workpiece to be printed, and can be designed into different sizes and materials as needed.

• Station fixture: installed on the turntable, used to fix the workpiece to be printed to ensure the accurate position of the workpiece during the printing process, such as pneumatic fixtures, mechanical fixtures, etc.

• Worktable: Supports the turntable and the workpiece. Some workbenches are also equipped with vacuum suction devices, which can further fix the workpiece through adsorption force.

Screen printing system

• Screen installation mechanism: used to fix the screen printing plate to ensure the stability and accuracy of the screen during the printing process. It can usually be adjusted up and down, left and right, and front and back.

• Scraper assembly: It consists of a scraper and an ink return knife. The scraper is used to scrape the ink from the screen so that the ink is transferred to the surface of the workpiece through the mesh of the screen; the ink return knife is responsible for scraping the excess ink on the screen back to the ink tank.

Control system

• PLC controller: It can perform logical control on motors, cylinders, sensors and other equipment to achieve precise coordination and sequential control of various actions such as the rotation of the turntable, the lifting of the screen, and the movement of the scraper.

• Human-machine interface: The operator sets printing parameters such as printing speed, scraper pressure, turntable rotation angle, etc. through the touch screen or control panel, and can monitor the operating status of the equipment in real time.

Auxiliary system

• Loading device: It realizes automatic loading of workpieces, such as conveyor belts, loading manipulators, etc.

• Unloading device: Unloading of workpieces after printing, such as chain conveyor belts, unloading manipulators, etc.

• Drying device: It speeds up the drying speed of ink, improves production efficiency and printing quality, such as UV drying lamps, hot air drying devices, etc.

Microcomputer monolithic program control operations, brand-name electrical and electronic components fitted.
Screen lift, precision and smooth running.
Automatically the line scraping oil back to the for mimeographed head movements function.
Printing stroke and speed can be flexibly adjusted.
Automatically balance the scraper technology.
Cast aluminum alloy beams, pneumatic lifting mode.
Foot printing function;
Scraper can set as stopping front or Back;

The turntable screen printer has mature cases on many products:

PVC wristband turntable screen printer
Small appliance operation panel turntable screen printer
Router shell turntable screen printer
Top of cosmetic box turntable screen printer

How to improve the printing accuracy of the turntable screen printer?

Optimize the mechanical structure

Turntable positioning accuracy: Use a high-precision divider (such as a cam divider) to ensure that the repeated positioning error is within 0.01-0.05mm when switching between workstations; the turntable table is precisely ground to ensure horizontality and rigidity. The scraper holder is guided by a linear guide and driven by a servo motor; the screen lifting is guided by a linear guide and driven by a servo motor. The encoder is used to monitor the turntable speed and angle in real time, and the proximity switch or photoelectric sensor is used to locate the workstation to ensure that the deviation of the workpiece when it stops at the printing position is ≤0.03mm.

Control process parameters

The ink scraper of the rotary screen printer is pneumatically controlled. The pressure sensor is used to monitor the scraper pressure in real time to ensure that the pressure fluctuation is ≤±0.2N; coordinate the rotary speed, scraper running speed and screen separation speed; CNC is used for quantitative processing of fixtures to ensure the standardization of fixtures and ensure that each product is placed in the same position on the workbench; the rubber scraper must have a certain hardness. If it is worn, it must be sharpened with a rubber scraper sharpener. Regularly calibrate the sensors, dividers, and linear guides.

Reduce external interference

The rotary screen printer should be installed on a solid and level foundation, the anchor screws should be fixed, the temperature and humidity of the workshop should be kept stable (temperature 20±2℃, humidity 50±5%), and the moving parts of the machine should be frequently filled with lubricating oil for lubrication.

Through the above measures, the rotary screen printer can control the printing alignment accuracy within ±0.05mm, meeting the high-precision requirements of precision electronics, medical equipment, automotive instruments and other fields.

What is a divider?

A divider is a mechanical transmission device that realizes intermittent motion. It is used to convert continuous rotational motion into periodic pause-rotation or swinging intermittent motions. It is widely used in special printing equipment such as pad printers, screen printers, hot stamping machines, and thermal transfer machines.

The divider is designed with a precise cam and roller structure, such as a curved cam divider and a flat cam divider. When the active part moves continuously, the driven part can complete precise intermittent motions according to the set angle or stroke, with high positioning accuracy, stable operation, and strong load-bearing capacity.

Application of the divider:

Flat turntable pad printer, vertical turntable pad printer

Flat turntable screen printer, vertical turntable curved screen printer, multi-color flat turntable screen printer, horizontal turntable servo curved screen printer

Flat turntable hot stamping machine, vertical turntable curved hot stamping machine, multi-color flat turntable hot stamping machine, horizontal turntable multi-color curved hot stamping machine

Flat turntable hot transfer machine, vertical turntable curved hot transfer machine.

Glass plate screen printing hot stamping production line, glass bottle screen printing hot stamping production line, hose screen printing hot stamping combination production line.