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screen printing equipment requirements

by:Senxi      2021-01-28
In order to print high-quality images and improve production efficiency as much as possible, our equipment must be in the best condition.
Special requirements for screen printing equipment.
I print the cap and the first maintenance item I see is the screen and the scraper.
The status of these two projects will drop faster than the other aspects of the printing equipment I also monitor.
Some of these other aspects will surprise anyone who prints, whether you are printing a hat, shirt, sweat, logo or something else, but first let\'s take a look at the hat screen and squeeze.
The screen is different from the shirt screen because one side must be a thin strip to print the image near the hat bill.
The image can be as close as possible to the 1/16 \"thin inside bar, not T-in the center of the screen-shirt screen.
When the tension on the screen is the least, the mesh may be out of registration during the printing process, and the ink may be pushed into the fabric.
Then you can see the color of the fabric.
Therefore, fast curing and second printing are required.
This double work can be avoided with a tight screen and other steps taken.
The low tension screen causes the ink to pile up under the screen.
The screen then needs to be cleaned regularly during the print run.
Compared to other areas of the screen, the tension near the thin edges of the frame (I . e. the image area) is lower.
The hint of this low tension at the bottom of the image area is that more ink has been deposited.
Using a high tension screen is one of the most important steps in making high-quality images and improving production efficiency.
Tension is more important for the cap screen than the shirt screen because of the material used to make the cap, especially the foam front cover, than T-
Shirts, logos and many other items stretch and glue screens, that is, screens that are glued to the frame, may need to be re-developed
Stretch and glue before work of any size.
The reportable frame can be used to tighten the mesh without removing it.
The aluminum tube frame has greater tension than the wood.
If the frame cannot be re-stretched, then the fine bar should be steel instead of aluminum, or worse, wood, which can increase tension by deflecting the thin strip side of the screen to the center of the screen before connecting the mesh.
We should wipe the steel with minerals or alcohol to remove oil, so that super glue can keep the net under tension even through a bar that is only 1/8 thick.
Once the glue is dry on all four sides, then the mesh can be laid on the flat side of the thin strip and glued to the flat side with super glue. (
The possible exhibition is to display photos of steel deflection on the cap frame with a quick fixture)
To avoid problems affecting quality and productivity, raising the tension of the mesh to a level not far from the break of the mesh is a key maintenance step.
The screen and scraper are like two scissors and must be sharp to cut off the ink and deposit the ink on the surface of the cap.
The SqueegeeCap scraper is also a completely different shirt.
Usually only 4 \"long cap scraper blades will be deflected more than the shirt scraper blades, especially in the corner.
When the image is printed by the soft angle of the scraper blade, a different amount of ink is deposited instead of by the center of the blade.
Choose a harder blade or like 75-95-
75 instead of 70 durometer blades that are often used for shirts will improve quality and productivity.
Replacing the blade in the handle is probably the best option.
Selecting the scraper of the aluminum handle with bolts through the handle instead of the blade, or sticking the blade to the wooden handle on the handle will support the blade better than using the wooden handle bolt through the blade.
The bolt through the blade is the pressure point that will distort the blade over time.
The scraper should be upright on a surface as flat as glass to see if the blade is straight.
If there is light under the blade, then the blade needs to be sharpened.
If there are scratches on the blade, or if the cutting edge is not sharp, the blade should be sharpened.
The edges of the circle pass the ink through the grid instead of cutting the ink so that the ink can be placed on the surface of the fabric.
Once the blade is sharp, the square edge should be polished with a homemade polishing device before each work to keep the edge sharp. (
Possible exhibitions)
After the printing is completed, the ink should be wiped away immediately.
If the ink stays on the blade for a few days, the blade will become hard over time and the material will fall off.
If chemicals are used on the blade, the blade should be rinsed with water before storing the scraper.
The extrusion should be stored on the blade and not on the blade, as this will distort the blade.
There are two parts of the horizontal level: the screen and the pressure plate.
The spacing between the two can produce parallax and distorted images.
Spacing may also leave more ink in certain areas of the printed image than in other areas.
You can check the plate by rotating it under a separate stationary object.
We are using a fast dryer that is not plugged in.
We tape the paper to the quick dryer so we can see if all the templates are at the same height and when the template goes through the bottom of the paper, just touch the edge of the paper.
The test also ensures that the printer, the flash dryer, will be in a uniform shutdown
Contact distance.
To check the level of the screen, we put a piece of organic glass 1/8 thick, larger than the table board on the table board.
We check the screen against the glass and we assume that the glass is absolutely flat and then put the screen into the press.
When the color arm of the press is placed on off-the grid must be flush with the plexiglass
Or we have a screen problem.
Once we have passed this test, we can register-
For the best quality color registration, please contact the front of the top of the plexiglass and remove the plexiglass for a uniform off-
Contact print conditions. (
Possible exhibitions)
Bend down on the panel.
If the template is not as strong as the concrete floor, the template should be supported to prevent color registration problems.
Then try to move the channel fixture that supports the screen horizontally.
If the two registration points on the side of the colored arm cling to the colored arm, then look for the movement of the colored arm to the center of the printing machine to correct it.
Try to rotate the channel fixture.
Any rotation must be resolved in order to print the quality of the repeatability.
Multi-wheel rotation
Some kind of bearing is being used for color machines.
The bearings to work properly must be installed, that is, there is pressure on them.
Therefore, if the screen does not rotate freely, there may be too much pressure or there may be foreign objects in the bearing.
Glue spraying and lint may be the culprit.
We don\'t use spray glue, so we don\'t have lint build up.
Can be cleaned with WD-bearing
40 or similar lubricant.
Coil all touch the adjacent coil through the visual inspection of the spring and seal spring.
If the coil is not in contact, the spring has overstretched and the only option is to replace it.
The manufacturer should design the printing press so that it is impossible to extend too much.
The potential risk of springs is that they are heat treated by the spring manufacturer.
Heat treatment makes the spring brittle and easy to break, so it is dangerous.
If the spring is heat treated, cover the spring or tie the coil together to prevent the steel debris from passing through the air at high speed.
Some printing machines use gas cylinders, just like some hatch rear cars and exposure devices.
Where the piston rod enters the housing there is a seal, which will wear over time.
The cylinder will then not support the weight of the screen and color arm.
The cylinder needs to be replaced when the seal is worn out.
Platen SizeI received a lot of calls on this issue.
Hats are available in a variety of sizes, just like shirts of different sizes can be purchased.
When we print youth shirts, we do not use full size adult templates, because we know that when the shirts are removed from the platform, it causes the fabric to stretch and deform, resulting in distortion of the image.
Over the years, the cap-type has moved from the large foam front to a low profile close to the head.
The old capping equipment may have been designed for larger capping.
The more common problem is the upper limit.
Buckram cap for embroidery instead of silk screen printing construction or fusion.
The flexible front cover will fit the cover template better.
If a stiff front cover has to be used, adding an image-sized liner to the surface of the template may solve the problem.
The pad can be cut off from the mouse pad, however, be sure to raise the screen height to a similar distance by inserting a ruler between the bottom flange of the channel fixture and the screen to keep it off
Contact distance.
Conclusion high quality printing and high productivity need attention to detail, some of which are unique for capping printing.
However, every issue is worth considering when printing shirts, jerseys, signage or any item.
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