The ink scraper controls the complex process of ink transfer in offset printing, including ink, plates and paper. In gravure printing, the ink scraper is a mechanical operation that is relatively simple, but it has its own uniqueness.

table of Contents

1 ink scraper summary

盛世国际2 ink scraper classification

盛世国际▪ Standard scraper

▪ Bevel scraper

▪ Coating scraper

盛世国际▪ sharp scraper

盛世国际▪ Trapezoidal scraper

3 ink scraper specifications

盛世国际4 Scraper performance indicators

5 ink scraper application

盛世国际▪ printed varieties

盛世国际▪ Printed substrate

▪ Ink characteristics

盛世国际6 ink scraper material

盛世国际Ink scraper

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The ink scraper controls the complex process of ink transfer in offset printing, including ink, plates and paper. In gravure printing, the ink scraper is a mechanical operation that is relatively simple, but it has its own uniqueness. Ink scraper requirements must be abrasive and efficient in order to ensure the high quality of printing quality, and it must be suitable for modern gravure printing lasting and high-speed needs. The ink scraper is a sheet of metal on the printing press that is used to scrape off the excess ink on the surface of the drum. Ink Scraper In each printing process, removing the ink without the pattern area is a key.

Ink scraper classification

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Standard scraper

盛世国际The standard scraper has exactly the same blade thickness. In the life of the scraper, the contact area with the drum to keep the same, so the color is exactly the same. The blade part of the unique polishing process can be printed at the beginning of the scraper quickly with the roller fit, reducing the waste.

Bevel scraper

The larger angle design of the blade shape makes the scraper wear less, the reduction in contact area can provide a clear scraping effect. Larger bevel design also reduces blade breakage. The degree of bevel varies from 4 ° to 15 ° and is applied to the printing of the short version.

Coated scraper

盛世国际Scraper with carbon-based substrate, the surface coated with nickel. The coating provides excellent corrosion resistance and oxidation resistance. It is very suitable for printing with corrosive inks and varnishes. In the course of use, the coating can also make up for impurities in the ink on the scraper fine damage, thereby reducing the color changes and stripes appear. The coating scraper is ideal for coating applications.

盛世国际Sharp scraper

盛世国际The new scraper can be applied to the gravure machine when the blade angle is difficult to adjust. The sharp blade provides elastic tension while maintaining a high contact angle. This unique design ensures smooth blade pressure to maintain the correct contact angle. Reducing printing pressure means extending drum life and reducing streaks.

Trapezoidal scraper

盛世国际With the progress of science and technology, the use of scraper printing marked: trapezoidal scraper because of its own from beginning to end and the contact area with the roller constant as the same, consistent with the printing quality, more and more manufacturers are used by the printing. Now most of the scraper used on the market is this trapezoidal scraper.

盛世国际Ink scraper specifications

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Generally expressed as:

盛世国际A × B / c × d

A. The width of the blade body (10,22,30,40,50,60mm)

盛世国际B. Thickness of the body (0.15,0.20mm)

盛世国际C. Blade width (1.3mm, 1.4mm)

D. Thickness of blade (0.065,0.075,0.10mm)

盛世国际Scraper performance indicators

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盛世国际1. Thickness Tolerance: +/- 0.005mm

2. Width tolerance: +/- 0.100mm

3. Polished surface deburring

4. Tensile strength: 1950 ~ 2150Pa (1860N / mm2)

5. Straightness: 0.5mm / 3.0m

6. Hardness: 500 ~ 600Vickers

Ink scraper application

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Before using the scraper, please know the following:

盛世国际Printed varieties

Gravure, flexo printing plate, generally according to the following printing category to select the required scraper, but the required blade error is not greater than +5um. 50 um: mainly used for ordinary packaging printing: cardboard and decorative printing.

盛世国际Printing substrate

盛世国际Paper, plastic film, aluminum foil, etc., need 75um ink scraper, mainly for gravure printing film foil scraping ink.

Ink characteristics

盛世国际Soluble, water-based, coating materials, the choice of 100 um: mainly used for flexible printing, coating and roller, etc., and 125 um: mainly for flexible printing: ceramic anilox and so on.

Ink scraper material

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According to the quality of scraper substrate, can be divided into the following scraper:

盛世国际1. Carbon steel scraper

盛世国际2. Plastic scraper

Ink scraper

盛世国际3. Coated scraper

4. Stainless steel scraper

Ink scraper material requirements with high quality, clean, no impurities, wear.