Chinese screen printing machine manufacturer shares the assembly method of silk screen printing machine

The assembly method of the silk screen printing machine, the process steps of the screen printing process, and the process of the screen printing process is believed to be unknown to many friends, and now the Chinese screen printing machine manufacturer will share!

How to assemble silk screen printing machine
1. (squeegee and ink return knife) Squeegee adjustment
① The adjustment of the brushing pressure should be carried out in cooperation with the adjustment of the distance between the printing plate and the printing table. In screen printing, the adjustment of the printing pressure is actually the adjustment of the height of the squeegee.
②The adjustment of the parallelism of the ink board to the platform can be adjusted separately with screw rods on the left and right; the left and right top wires on the middle shaft can be adjusted.
③ The adjustment amount of the plate inclination is generally in the range of 65-85 degrees, which can be selected according to the needs.
④ The length of the board cannot be adjusted, and it is generally supplied in complete sets, and each set has several different lengths for selection.
2. Adjustment of the parallelism between the linear 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.
①The platform and the guide rail should be parallel, and the scraping plate moves along the guide rail. If the two are not parallel, the scraper will not always touch the platform with a certain pressure, and even a gap will appear. This adjustment has been adjusted before the machine leaves the factory.
②The screen printing plate and the platform should be parallel, otherwise, the distance between the screen and the platform is inconsistent, causing the squeegee printing pressure and the deformation of the screen printing plate to be inconsistent. Therefore, the flatness of the screen frame itself should be guaranteed.
3. Wiping speed adjustment.
Generally, the adjustment handle of the continuously variable transmission device realizes the adjustment of the size of the entire working cycle to ensure that the speed of each link is consistent. Each operation adjustment is equipped with a corresponding locking mechanism, and the scraper printing operation must be carried out in a locked state. The installation and maintenance of screen printing machines generally have specific regulations and requirements in the machine instruction manual, and users can refer to them for implementation.
4. Itinerary adjustment.
Including the adjustment of stroke size and stroke position. Silk screen printing machine using the crank mechanism and the pendulum mechanism can adjust the stroke by adjusting the radius hole position of the crank and pendulum. The stroke of the flash gauge with a pneumatic mechanism can be adjusted by adjusting the position of the stroke switch. The stroke of the silk screen printing machine driven by the chain cannot be adjusted.

Digital Screen Printing Machine

Screen printing process arrangement
Screen printing is a direct printing method, and there are three types of process arrangements:
①Cardboard → screen printing → post-press processing, that is, first screen printing on corrugated cardboard or other cardboard, and then making cartons and carton products according to needs;
②Carton → screen printing, that is, screen printing directly on the corrugated carton or other cartons and cartons that have been made;
③Secondary processing, that is, first screen printing on the face cardboard, then making corrugated cardboard according to needs and then making cartons and carton products.

screen printing process
1. screen printing
(1) Screen selection
① Nylon screen: Nylon screen has high strength, high wear resistance, high alkali resistance, slightly poor acid resistance, good ink permeability, small wire diameter, good elasticity, and clear imprint;
②Polyester screen: The polyester screen has good stability, high strength, corrosion resistance, better performance than nylon screen, high stretching tension, suitable for high-precision printing;
③ Stainless steel wire mesh: stainless steel wire mesh has high strength, good stability, small wire diameter, high mesh, good resistance, long life, poor elasticity, easy to break under the impact, suitable for precision printing, not suitable for curved surface printing;
④ Nickel-plated polyester wire mesh: Nickel-plated polyester wire mesh combines the advantages of polyester mesh and stainless steel mesh, with wide applicability, moderate price, and poor corrosion resistance.
(2) Stretching net
There are wooden frames, metal frames, plastic frames, combination frames, etc. for the screen version.
When stretching the net, the net frame should be cleaned first, and the net can be stretched manually, mechanically, or pneumatically, and then glued and trimmed after stretching. Stretching requires that the tension of the wire mesh is appropriate, uniform, and stable, that the wire direction is consistent to avoid oblique pulling, and the warp and weft wires are parallel to each other.
(3) plate making
① Direct method: screen cleaning → photosensitive glue coating → printing → development → revision.
Warm reminder from Chinese screen printing machine manufacturers: This method is time-consuming to apply glue, the film thickness can be adjusted, the combination is firm and printing resistant, and the graphics and text are easy to jag.
②Indirect method: photosensitive film→printing→developing→sticking film→removing film base→repairing.
Reminder: This method is complicated to operate, the lines are smooth, the film layer is not strong, the printing resistance is low, and the film thickness remains unchanged.
③Mixed method: screen cleaning→film patch→printing→developing→retouching.
Tips: This method is easy to operate, the thickness is fixed, and the lines are smoother and firmer.
(4) Screen direct plate making
①Laser ablation direct plate making: first coat the screen photosensitive adhesive on the metal screen, and burn through the photosensitive layer with laser, the mesh part of the graphic and text is transparent, and the computer of the prepress system controls the ablation place. This method can only be used for metal nets.
②Laser exposure direct plate making: First, apply photosensitive glue on the screen, and the prepress system computer controls the laser to image on the screen to make a screen plate.
Warm reminder from Chinese screen printing machine manufacturers: This plate-making method uses special photosensitive glue, the range of ultraviolet light waves is narrow, and the price of laser exposure systems is high.
③Inkjet imaging system: First, apply photosensitive glue on the screen, and the prepress system computer controls the inkjet system to spray light-blocking ink onto the photosensitive layer of the graphic part, and then fully expose it to ultraviolet rays.

There are still many uses for screen printing machines, and they also have some particularly important roles and positions in some other industries, such as letters on the keyboard, text on the monitor, patterns on T-shirts, graphics on containers, etc. Etc. These are all printed by screen printing. For more information about silk screen printing machine, please visit https://www.changsinter.com/