How to install and adjust the screen printing machine?

Installation adjustment of screen printing machine:

Phase adjustment of the working cycle of the whole machine: strictly adjusted by the manufacturer according to the designed cycle phase diagram, and hinged or locked.

Operation adjustment: the adjustment of the parallelism between the guide rail, the printing plate and the three layers of the working platform: generally the guide rail or platform is used as the benchmark for adjustment.

The platform and the guide rail should be parallel, the scraper is along the guide rail movement, if the two are not parallel, the scraper will not always contact the platform with a certain pressure, and even there is a gap, this adjustment has been adjusted before the machine leaves the factory.

The screen printing plate and the platform should be parallel, otherwise the screen distance (the distance from the bottom surface of the screen printing plate to the printing surface) is inconsistent, resulting in inconsistent printing pressure and screen printing plate deformation, therefore, the flatness of the screen frame itself should be guaranteed, and the user generally puts forward specific requirements according to the need.

Plate adjustment: refers to the adjustment of the printing accuracy between the screen printing plate and the printed part on the screen printing machine. Height adjustment (>40mm), front and rear adjustment and left and right adjustment (>20mm), horizontal angle adjustment (>3°).

Scraper Adjustment:

The adjustment of the parallelism of the scraper to the platform, adjusting the left and right screw rods to adjust the height of the scraping board; The adjustable left and right top wires with top wires on the left and right sides of the middle hinge are essentially adjusting the high and low positions on the left and right sides of the ink plate.

The adjustment amount of the scraper inclination angle is generally in the range of 65° 85°, which can be selected according to needs.

The adjustment of the printing pressure is actually the adjustment of the high and low position of the squeegee.

The length of the squeegee plate can not be adjusted, generally according to the kit**, each set has several different lengths for selection.

Stroke adjustment: includes the adjustment of stroke size and stroke position. Through the adjustment of the radius of the crank and the pendulum rod R hole position to achieve stroke adjustment, R increases the stroke increase, and the stroke length generally exceeds the pattern 20 50mm.

Screen (Taiwan) spacing adjustment: The screen (Taiwan) spacing adjustment can be realized by lowering the screen printing plate or raising the platform, and the method of raising the platform is generally adopted. The screen printing plate should be consistent and error in the distance between the four corners of the screen.

The distance between the net platform is generally 2 5mm, and only when there is a net lifting compensation action, the distance between the net platform is allowed to be large in front and small in the back.

Scraping speed adjustment: to be fast, each action is fast, to be slow, each action is slow.

1.Willett coil screen printing machine ink preparation.

The method of judging the degree of thickness: the degree of concentration is better if the ink passes through the screen and there is no screen or drawing on the printing surface. The degree of thinness is to put it on the screen, and the ink can reach through the mesh by its own weight but not dripping is the best.

When the printed lines are thin, the dilute point should be adjusted, and vice versa, the dense point should be adjusted.

2.Willett coil screen printing machine screen plate selection.

The quality of the silk cloth is uniform in diameter, and the number of mesh is accurate and consistent, which is stable in quality.

The mesh generally used is 450 500 mesh. For fine lines, high ink fineness and poor absorption, the screen with a high mesh number should be selected, and conversely, the screen with a low mesh number should be selected.

The position and size of the screen should be determined according to the structure and size of the substrate and the position of the substrate. If the design is not good, it will affect the quality of silk screen printing, or even fail to screen printing. In addition, the ** on the same printed object is best printed with a screen.

If it is divided into more than two screen printing, the process will reduce the pass rate of screen printing.

3.Willett coil screen printing machine squeegee selection.

Most of the scrapers used are made of polyurethane. Polyurethane rubber scrapers have good wear resistance, solvent resistance and resilience. Its hardness is 60 80 Shore.

For substrates with large screen tension and good surface flatness, a squeegee with high hardness should be selected. On the contrary, the one with low hardness should be selected.

When printing on curved surfaces, low-grade spherical surfaces, or substrates with poor flatness (local protrusion), the width of the squeegee should be narrow rather than wide.

4.Willett coil screen printing machine screen positioning.

The fixture materials used are metal, wood, plywood, and PVC transparency. If the positioning is difficult and the size of the substrate is small, the metal fixture should be used.

5.Willett coil screen printing machine screen printing process.

If the scraping pressure is high, the ink output is large, but the screen is easy to deform, so the scraping pressure should not be high. The scratching speed is usually 60 200mm s. The scratching speed is fast, the ink output is small, but it is not easy to block the net. Therefore, the ink that is easy to block the net should have a faster scraping speed.

Hello! The automatic screen printing machine adjusts the single printing, and the whole Hengsun automatic screen printing machine needs to be adjusted, and the single automatic screen printing machine is disassembled and adjusted 1, first of all, the screen frame of the screen printing machine is clamped on the clamping device, and the cushion block with a certain thickness is selected to pad the bottom of the screen frame and the clamping frame, and the screen frame is placed in a horizontal position. 2. Then use the plug gauge to measure the gap between the bottom surface of the screen frame of the screen printing machine and the printing table, and use cushion blocks of different thicknesses to adjust the size of the gap until the gap meets the requirements of printing.

3. After the gap value of the screen printing machine is adjusted appropriately, fix the cushion block of the corresponding thickness on the printing pad to control the size of the gap. 4. For the gap adjustment of mechanical printing, the screen frame of the screen printing machine should be installed on the clamping frame fixture, so that the screen frame and the printing table are relatively horizontal, and then the size of the gap should be measured with a plug gauge, and the up and down movement of the lead clamping frame should be adjusted by adjusting the bolt to achieve the clearance required by printing.

Summary. Adjustment of the parallelism between the three layers of the guide rail, the printing plate and the working platform. If these three layers are not parallel, the screen printer will hardly work. Generally, the guide rail or platform is used as the benchmark for adjustment.

The platform and the guide rail should be parallel, the scraper plate is moving along the guide rail, if the two are not parallel, the scraper will not always contact the platform with a certain pressure, and even there is a gap, this adjustment has been adjusted before the machine leaves the factory.

The screen printing plate should be parallel to the platform, otherwise the distance between the screen and the platform will be inconsistent, which will cause the printing pressure of the squeegee and the deformation of the screen printing plate to be inconsistent. Therefore, the flatness of the screen frame itself should be guaranteed.

How to adjust sheet-fed printing with a fully automatic screen printing machine.

Adjustment of the parallelism between the three layers of the guide rail, the printing plate and the working platform. If these three layers are not parallel, the screen printer will hardly work. Generally, the guide rail or platform is used as the benchmark for adjustment.

The platform and the guide rail should be parallel, the scraping plate is along the guide rail movement, if the two grandchildren are not parallel, the scraper will not always contact the platform with a certain pressure, and even out of the car to find the gap, this adjustment has been adjusted before the machine leaves the factory. The screen printing plate should be parallel to the platform, otherwise the distance between the screen and the platform will be inconsistent, which will cause the printing pressure of the scraping sail knife and the deformation of the screen printing plate to be inconsistent. Therefore, the flatness of the screen frame itself should be guaranteed.

The adjustment of the parallelism of the platform by the scraper can be adjusted separately if there is a screw rod on the left and right; The left and right top wires with orange vertical top wires on the left and right of the middle hinge can be adjusted, which is essentially the low position of the quotient on the left and right sides of the scraper. The adjustment amount of the inclination angle of the scraper is generally in the range of 65-85 degrees, which can be selected according to needs. The adjustment of printing pressure should be coordinated with the adjustment of the distance between the printing plate and the printing plate.

In screen printing, the adjustment of the printing pressure is actually the adjustment of the high and low position of the squeegee. The length of the scraper plate cannot be adjusted, and it is generally pressed into a round opening kit**, and each set has several different lengths of tape for selection.

1.When screen printing, the power lamp shows normally, but automatic, half-draft digging automatic does not respond, generally speaking, this kind of fault is caused by the failure of the solenoid valve, or the broken fuse. When troubleshooting such faults, you can check the connection of the fuse and check whether the solenoid valve is damaged.

2.The situation that the screen printing machine does not decline after the automatic and semi-automatic start is more common when the printing machine is working, generally speaking, the fault is mostly caused by the proximity switch of the horizontal slide seat or.

3.The footswitch slide is lowered after being depressed, but it returns to its original state after being released, or it does not respond after moving left and right. The key is pure in fact, this kind of failure.

There are many problems of early limb modification of screen printing machine, and it is necessary to find professional people to detect according to the actual situation, find the root cause of the problem, and replace the equipment or repair it in time, so that it can fundamentally solve its failure problem and be more conducive to safe and scientific production.

The speed control of the Willett coil screen printing machine is adjusted by the computer control board.

The speed in the printing of the Willett screen printing machine refers to the speed at which the squeegee moves forward during printing. The printing speed is too slow, although the ink filling is better, but there will be ink penetration at the edge of the pattern, resulting in the expansion of the pattern; If the knife speed is too fast, it will cause insufficient ink filling, incomplete imprint, and will also cause the ink release speed to keep up with the printing speed, resulting in too long adhesion section and affecting the printing quality. Ink viscosity, large and poor fluidity, knife speed is appropriately slower, and vice versa; The number of screen mesh is high, and the screen screen of Willett sheet screen printing machine has a small mesh area, and the speed of the scraper can be slower when brushing. In the printing process, it is necessary not only to grasp the speed of the scraper, but also to pay attention to the uniformity of the scraping speed. If it is fast and slow, there will be streaks on the substrate, which will affect the printing quality.

Skill comes from practice. But to sum up a few words: first adjust the screen distance, then adjust the scraper pressure, and then fine-tune the balance.

You can search Sunshine Bus to learn about it.