What Is The Principle Of A Flat Screen Printer

Posted by lichengprintingmachine on Jul 27, 2020 in Flat Screen Printer

Tenter use: Tenter is used for heat setting of warp knitting, weft knitting, chemical fiber fabrics, and also for heat setting of coating, wool, cotton, polyester and other fabrics. Car type: left-handed, right-handed (customized by user). Working width: 800-3200 (customized by customer). Heat source: oil heating, oil heating furnace for main drying and 400,000 kcal/hour. Spray style: small cycle Mesh staggered strong jet wind speed 10m/s. Planned speed: 0~80 m/min. Weight of the whole machine: 40 tons. Temperature: 100~180 degrees

Purpose: This machine is used for gluing treatment on the reverse side of various carpet non-woven fabrics and artificial leather. The basic source principle: Adopt natural latex, butadiene rubber to foam, and then use this configuration to deal with the anti-slip and elegant results on the back of the carpet. Model: Model 2000 and Model 4000, non-standard production lines can be planned according to customers if there are special process requirements.

The working principle of the Flat Screen Printer feeds the unshaped cloth from the edge stripper into the machine, and the machine automatically hangs the two ends of the cloth on the needle plate. The two ends of the needle plate enter the oven with the step of the machine, and the oven is heated by electricity. , The fan blows the air, and the constant temperature oven with several different temperature sections in succession enters the tail end and after cooling to remove static electricity, the swing falls into the cloth car, and a crisp and elegant cloth is obtained. The Stenter setting is usually used for polyester and other chemical fiber products.

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Factors Affecting The Quality Of Flat Screen Printer

Posted by lichengprintingmachine on Jul 16, 2020 in Hot Air Stenter

In the process of the Hot Air Stenter, the temperature is the main factor affecting the quality of heat setting. During the operation, because the fabric is heat-set, the original wrinkles are eliminated, the surface smoothness is improved, and the fabric The dimensional thermal stability and other taking performance are closely related to the heat setting temperature.

The setting time of the tenter is another main process condition for heat setting. After the fabric enters the heating zone, the time required for heating and setting can be divided into the following parts:

1. Heating time: the time required for the fabric surface to heat to the setting temperature after the fabric enters the heating zone.

2. Heat penetration time: After the fabric surface reaches the setting temperature, the fibers in each part of the fabric have the same heat penetration time as the setting temperature.

3. Molecule adjustment time: After the fabric reaches the setting temperature, the molecules in the fiber need to be adjusted according to the setting conditions.

4. Cooling time: the time required for the fabric to leave the drying room to fix the size of the fabric for cooling.

The setting time usually referred to by Flat Screen Printer usually refers to the time required for the first three items, to a certain extent excluding the fourth item. If one item is regarded as a preheating effect, then the setting time only refers to the time required for the second and third items, that is, the time required for heat penetration and molecular adjustment.

The time required for heating and heat penetration depends on the performance of the heat source, the weight per unit area of ​​the fabric, the thermal conductivity of the fiber, and the moisture content of the fabric. The tension of the fabric during the heat setting process has a certain influence on the setting quality, including the thermal stability, strength and elongation at break of the fabric.

The thermal stability of the warp dimension increases with the increase of warp overfeed during setting, while the thermal stability of the weft dimension decreases with the increase of the stretch of the door width. After setting, the average single yarn strength of the fabric is slightly higher than that of the unshaped, and the change in the weft direction is more obvious than that in the warp direction. After setting, the breaking elongation of the fabric decreases in the weft direction as the extent of extension increases, while the warp direction becomes larger as the overfeed increases.

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Introduction Of The Function Of Flat Screen Printer

Posted by lichengprintingmachine on Jul 9, 2020 in Allgemeines

Flat screen printing machine, also known as screen printing machine, is called “screen printer machine” (Screen Printer Machine), which is a device that leaks ink, solder paste or patch glue onto products or PCB pads through the screen. The screen printing industry dominated by Flat Screen Printer is widely used in the printing of many products. According to the survey, various products in my country’s screen printing-screen printing industry are ranked according to the number of manufacturers: signs and panels, plastic sheets, advertising materials, and printed circuits. Some emerging screen printing fields have grown at an extraordinary rate, such as optical disks, anti-counterfeiting printing, and bar code printing. Advertising printing-In commercial advertising, screen printing will have more markets, especially electrical companies, tobacco and alcohol companies in order to promote their own image are very important to the role of advertising.
Packaging screen printing-The main service object of the packaging industry is the screen printing industry. The continuous development and application of screen printing technology will better serve the packaging and decoration industry and contribute to the prosperity of the packaging and decoration industry. Bring a broader market for the screen printing industry. Such as printing high-end packaging boxes, bottles, cigarette packs and so on. If the shell of large-scale electrical products is printed with a silk screen, the products decorated by these large-scale shells will be loved by customers no matter where they are placed in the mall, and play an irreplaceable role in packaging advertising. With the continuous development of today’s computer technology, a variety of software is constantly emerging, especially the production of CDs for cultural entertainment, TV movies, and various publications is increasing day by day. 92% of the company logos, images, and text printed on this CD are screen-printed. The screen printing equipment has less investment and low cost, and is suitable for the printing of CD varieties.
Advertising screen printing-There will be more markets for screen printing in commercial advertising, especially electrical companies and tobacco and alcohol companies attach great importance to the role of advertising in order to promote their own image. The time and quality of advertisements determine the company’s market share. Therefore, various electrical advertisements, outdoor advertisements, and commercial advertisements provide a broad space for screen printing. In commercial competition, large-scale outdoor advertising is valued for its wide view and good effect. Therefore, with the development of commodity advertising, China’s screen-printed color outdoor advertising has increasingly shown the advantages of large batches, cheap prices, bright colors, and fast delivery. It has been recognized and attracted by more and more urban planning departments and advertising management departments. A lot of advertising businesses.
Circuit screen printing-screen printing occupies 80% of the electronics industry. For example, in the production of a TV set, screen printing is used in many places, and the development of large flat display devices such as display screens (PALC) is increasingly inseparable from screen printing. For example, the POP board discharges the xenon gas by applying voltage, and the ultraviolet light emitted is converted into visible light after being irradiated on the phosphor. For example, the 40-type board produced by screen printing and mass production can have a width of 30 μm.
Handicraft screen printing-With the development of western my country and the process of urbanization in rural areas, the trend of increasing ceramic tile production lines is strong. In addition, my country is a large ceramic country. In addition to meeting the large domestic demand, it is also exported to more than 150 countries and regions. Therefore, silk screen printing of ceramic flower paper has a pivotal position in China’s screen printing industry.



How To Better Use Flat Screen Printer

Posted by lichengprintingmachine on Mai 15, 2020 in News

Licheng is a professional manufacturer of R & D screen printing machines, pad printing machines, and various printing equipment. The following is a brief introduction about the quality improvement of Flat Screen Printer:
In addition to the choice of plate-making materials, the key to the advancement of screen printing products lies in the rationality of screen printing plate production technology. Nowadays, screen printing plates are mostly made by hand, and there is even a need for the advancement of plate-making technology.
L Selection of screen mesh
The choice of screen mesh number should be decided according to the printed pattern and the request for the pattern. If the pattern is larger and the line is thicker, and the request for the pattern is not so precise, you can choose a mesh with a lower mesh. On the contrary, if the pattern is fine and the lines are narrow, and the pattern is pleading for accuracy, a mesh with a relatively high mesh number should be used. The screen mesh number directly affects the print quality. Because the printing plate with relatively low mesh screen number has good penetrability of the printing paste, the mesh is not easy to be blocked. But the mesh number is too low, which also makes the printing material penetrate too much, which constitutes the phenomenon that the edges of the pattern are unclear and the image is distorted.
The screen mesh has a high mesh number, can reach the edge of the figure, and the line is very scratchy. However, the screen mesh number cannot be higher than the printing material mesh number; otherwise, the mesh holes are simply blocked. Therefore, you should choose a moderate number of meshes, generally between 120 meshes and 300 meshes. You can use the bisection method in the single-element advantage selection method to make a selection test.

2. Stretching the net
When the wire mesh stretches the frame, the tightness should be appropriate, and pay attention to the same tension at each point in the frame. If the wire mesh is stretched too tight or too loose, or the tension at each point is inconsistent, the following questions may occur:
The screen is stretched too tightly: to make the printing plate screen lose its elasticity, and the image is distorted during printing; the screen is stretched too loose or the tension of each point is different: ①Precision lines cannot be developed; ②The edges of the pattern appear jagged, Distorted graphics; ③The phenomenon of slurry leakage occurs during the printing process; ④For the F version, the adhesion between the film and the screen is poor, which constitutes the phenomenon of the film falling during development.

The quality of the printing plate is related to various temperatures during the production. This temperature includes: 1. The temperature in the operating room; 2. The temperature in the oven; 3. The temperature in the exposure box; 4. The temperature of the developer.
L Operating room temperature

Operating room temperature should generally be kept at 25 ℃. In winter and summer, pay attention to the scheduling and control of temperature. For version F, the effect of room temperature is not obvious. For version D, in hot climates, if the room temperature control is not good, the following questions will occur:

①It is easy to make thermal cross-linking when making glue, which makes it difficult or impossible to develop; ②There are many bubbles in the glue, causing bubbles or trachoma on the layout. For the N version, when the room temperature is lower than 2O ℃, the following questions will occur: ① The uneven thickness of the squeegee constitutes a difficult or undevelopable development: ② The appearance of the screen is blisters, which constitutes the phenomenon of slurry leakage in the printing process; ③ The page is not Flat, the color of the printed pattern is inconsistent.

2. Temperature in the oven

The drying temperature determined according to the performance indexes of the plate-making materials should be preliminary and gradually tested from the lower limit of the rule plan according to local conditions, and the best drying temperature should be selected. Generally, drying the N version does not add blast; drying the F or D version needs to add blast to accelerate the speed of the volatilization of the plate surface, and quickly make the plate monotonous. If the drying temperature is too high, the following questions may occur:

① Difficult to develop, with haggle; may not show up; ② The silk screen loses its elasticity, causing the printed patterns to be distorted.

The drying temperature is too low, and the monotonic time must be extended, otherwise the layout cannot be fully monotonic. For the F and D plates, the film layer or adhesive layer will fall during development; for the N version, the adhesive layer is also easy to be thinned during development, and then the service life of the printing plate is shortened.

The process of making a printing plate is a messy physical and chemical process involving many elements. In addition to the above elements, there are the luminosity during exposure, the humidity in the process of plate making, and so on. Especially in the plate-making process, many processes are manual operations, and many elements are directly controlled by people. Therefore, in the production process, many elements cannot be measured accurately. For example, the thickness of the squeegee is difficult to measure during operation. Therefore, it can not be determined specifically how long it can be dried; for another example, how thick the film layer after squeegee is, how long should the exposure time be It is added incrementally, but it is obtained after repeated experiments!



Introduction Of Characteristics Of Flat Screen Printer

Posted by lichengprintingmachine on Mai 9, 2020 in News

As an electronic device, Flat Screen Printer has attracted the attention of many businesses.  So, what are the characteristics?  For this problem, if you want to know what the specific characteristics are, you should also know the classification of flat-panel printers.  After all, different types of flat-panel printers have different characteristics.  According to different characteristics, flat-panel printers are mainly divided into fully automatic, vertical, turntable, four-column, diagonal arm, fully automatic elliptical flat-panel printers, etc., and different types of characteristics are also different, let’s take a look at them.
I. full-automatic flat-panel printer
As the name implies, the most important feature of a full-automatic flat-panel printer is its high degree of automation. This kind of flat-panel printer is mainly used in mass production. This kind of flat-panel printer is aimed at printing soft materials such as PET/PE. Generally, large organizations will only introduce this kind of full-automatic flat-panel printer.
II. Vertical Flat Plate Printer
This kind of vertical flat-panel printer is mainly used in the printing industry, and with the different needs of the industry, some high-tech electronic industries, dot printing and so on have also begun to have a large number of demands for vertical flat-panel printers.  The biggest characteristic of this kind of vertical flat-panel printer is its relatively high clarity.
Three, turntable flat printer
The biggest characteristic is that it is difficult to locate. This kind of flat-panel printer is mainly used in the clothing industry in general, while some small CD-making enterprises also use this kind of flat-panel printer more often.
Four-and four-column flat-panel printers
At present, it is mainly used in decoration industry or large glass enterprises. This kind of flat-panel printer is more suitable for large-area industries.
Five, inclined arm flat printer
Currently, it is mainly used in the packaging industry. Although its efficiency is higher than other flat-panel printers, its accuracy is lower. Therefore, such flat-panel printers are more common in uv printing.
Six, full-automatic oval flat-panel printer
In addition to the above, there is also a kind of full-automatic flat-panel printer similar to that of the full-automatic elliptical flat-panel printer, which is currently mainly used in the clothing industry and can be used for water slurry, ink, etc.
No matter what type of flat-panel printer, it has different characteristics, and different flat-panel printers have different prices.  No matter what kind of flat-panel printer, there is an adaptation process at the first contact.  In this regard, we should make a detailed analysis of our needs before purchasing, and at the same time have a detailed understanding of what is suitable for us. Only in this way can we really buy a flat-panel printer that is suitable for us.


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