The hottest pad printing technology pad printing m

Great analysis of pad printing technology, pad printing machine and pad printing ink

working principle of pad printing machine

1 Fixed oil basin and oil cup

most pad printing machines, especially large pad printing machines, generally use fixed oil basin and oil cup. The mechanical structure of this kind of pad printing machine is relatively simple but very solid. The in and out of the pad printing head is driven by the sliding assembly. Due to the impact of the sliding assembly of the print head, the vibration of the pad printing head will inevitably occur, thus limiting the printing speed of the body

2. Movable oil basin and oil cup

the printing head of movable oil basin and oil cup only moves up and down, without mechanical impact, and the vibration of printing head is also reduced. Therefore, most high-speed pad printing machines use movable oil basin and oil cup

printing process

pad printing machine can be divided into open oil basin and sealed oil cup system, and the rubber head travel action operates the same on the two systems

1. Open oil basin

(1) when the pad printing head moves forward, the oil rod fills the pattern etching printing plate with ink

(2) when the pad printing head moves backward, the scraper scrapes off the excess ink on the steel plate, leaving only the ink including the garbage storage container, the automobile fuel tank, and the pattern etching part of the automobile exterior trim

2. Sealed oil cup system

(1) when the oil cup is pushed forward, the ink in the cup is sent to the etched position on the printed board, and the ink is filled

(2) when the oil cup returns, the ceramic ring of the oil cup will be like a scraper. The principle of transfer printing is similar to intaglio printing. The tools include silicone pad printing rubber head, patterned printing plate (steel or fiber) and ink, which can print all kinds of extremely fine lines, fonts and patterns, and even four-color plate images. Whether the surface of printed matter is concave, convex or irregular, it can still print the desired effect. For example, printing four-color trademarks on golf balls is one of the specialties of pad printing machines. Generally, the excess ink is completely scraped away

five main elements of pad printing

1 Sealed oil cup: it integrates the functions of sealed ink storage and scraping off excess ink

2. Printing glue head: This is the medium that transfers ink from the printing board to the surface of the product

3. Printed board: etch printed patterns

4. Ink: according to the printing requirements, the "color" is determined as one of the seven research institutions that constitute the catapult network

5. Pad printer: performs transfer printing

the sealed oil cup combines the functions of sealed ink storage and ink scraping. The ink is sealed between the surface of the printed board and the blade of the ceramic ring of the oil cup. The ink is sealed in the oil cup to minimize the exposure of the ink to the air, reduce the volatilization of the ink, and maintain the stability of the ink concentration, so as to ensure the stable and ideal printing effect. In addition, the blade of the ceramic ring of the oil cup needs to be hard and sharp, so fortitude Engineering Co., Ltd. adopts the hardest material among ceramics, combined with 0.25mm thin steel sheet, the oil cup can play its maximum function. The diameter of the sealed oil cup is 60 ~ 19, and the resource and environmental property right system is perfect. 5 mm is easy to degrade in the body, which is suitable for general printing purposes

key to selecting pad printing head and pad printing ink

to obtain clear and distinctive printing effect, attention should be paid to when selecting pad printing head:

1 Try to choose a circular or conical pad printing head

2. Try to choose a larger angle pad printing head

3. If the product can withstand pressure, you should use a harder printing head, because the harder rubber head has a longer service life and can print clearer patterns. A variety of pad printing inks are flooding the market, and plate printing inks are also used for pad printing. Excellent pad printing inks must have the following characteristics:

(1) strong viscosity to the printing surface

(2) good fluidity. Some inks become slurry and cannot flow in the oil cup or oil basin

(3) when the thinning water evaporates with the ink, its viscosity can be exerted

(4) fine pigments will make the gloss more obvious and reduce the transparency. Generally, the normal printing ink thickness is 7 μ m。

(5) the gloss of the ink cannot be changed by the influence of the printing surface

(6) it can dry quickly without affecting its viscosity

if the ink is too thick, the printing plate will be difficult to clean, resulting in electrostatic problems (hairline); If the ink is too thin, it will increase the transparency, and it is difficult for the pad printing head to transfer the ink

because there are many different inks on the market, it is difficult to determine the time and frequency of adding thinning water or slow drying water. We can only decide by observing the printing effect. To this end, the firm launched a series of scientific equipment, such as ink concentration tester, to measure the ink concentration

market requirements

1 Special single product market, such as lens pad printing machine, toy car and optical disc industry

2. In order to increase competitiveness, the standard machine is equipped with a rubber head cleaning system and a DPS system

3. High elasticity machine: used to meet different printing requirements and applications in the market

4. High speed printing: servo motor multi glue head equipment, such as alien system

new market direction

the special single product market is expanding rapidly. Careful cutting of machine design and pad printing software equipment package is an inevitable requirement of the market. For the special product market, it is necessary to make in-depth research and understanding of the situation, so as to make the corresponding pad printing machine and related printing software systems, such as dvd/vcd/cdr/cd-card, toy car and flashlight display lens. (end)