Español 
Latest products
Gravure proofing process characteristics of a prototype
by：Lisson
2020-11-17
Gravure gravure proofing process features of prototype dozen sample proofing process characteristics of
proofing process characteristics of gravure proof press
( A) Gravure proof press
proofing operating sequence installation proofing materials proofing materials adjusting pressure to insert the dowel pin, ink to test the ink viscosity, install the plate cylinder to set the scraping blade pressure, the plate cylinder positioning - painted proofing ink - monochrome and color proofing to detect more proofing sample
( 2) Gravure proofing machine proofing process proofing, embossing roller by substrates on the pressure to make it close to the plate surface, separation of substrates will gravure mesh point of ink absorption, form the image. The stand or fall of image transfer in the outermost layers depends largely on the impression cylinder of rubber. Intaglio printing machines in the rubber roller outer rubber hardness is 65 shore hardness, hardness than the impression cylinder used in the printing company is a bit low. The impression cylinder of different hardness of pressure distribution is different, the lower hardness of cylinder under the same pressure under the action of deformation is greater than the hardness of big drum, rubber deformation produced by the elastic can make the substrates to produce elastic deformation, inconsistency between the substrates and gravure cylinder of large-area contact, will be more ink adsorbed to the surface of substrates.
hardness produced great impression cylinder deformation is small, with gravure roller contact area is small, substrates adsorption on ink is less. Rubber hardness is not the same, the printing quality in highlights part of the performance difference is more apparent, especially when paper proofing on the highlight part in outline.
this phenomenon with electric engraving mesh point of v-shaped structure has much to do. When the machine proofing device, added a secondary electrostatic can well solve the problem of specular white dots. Alignment device occupies very important position in the concave prototype, first, for it has a good alignment precision. Once the alignment error is greater than zero. 2 mm, concave sample electricity points on the graph effect will be affected by a lot of. General requirements of concave prototype first lap alignment error proofing cannot exist.
each color has finished, below the impression cylinder of a positioning block gauge can make the impression cylinder stop in its last stop position, when the impression cylinder with gravure cylinder near again, they squeezed the location of the point with the last point of extrusion is a cause, guarantee the alignment precision of proofing. Domestic copy machine is a big defects do not pass on the alignment precision. Second, the alignment device with great flexibility. Gravure cylinder length difference is large, short only 400 mm, long may be up to 1600 mm, and registering line in the version of the drum without a fixed position, some on the design, some simply without registering. The version of the drum as long as you can to pull machine, requires that hit a sample of alignment precision, thus, kumite prototype alignment device flexibility requirement is high.
for multicolor alignment, color proofing effect, must coordinate the following process:
1, the substrate must be under a certain tension, parcel to the roller;
2, the first color plate cylinder is installed between two heart clamp head or the swing arm bearing;
3, move the big drum, close to the surface of the plate cylinder, turning to the lock position, use the pin needle fixed to make it in a safe state;
4, turn the plate cylinder, aim the set of huai town horizontal gauge line roller surface carved horizontal line;
5, the big drum on the plate cylinder and achieve certain pressure;
6, check the alignment state, repeatedly, until completely alignment gauge line;
7, scraping knife adjustment to and roller surface form appropriate parallelism, which can adjust the vertical direction again, so that good scraping;
8, will ink coating on the surface along the cylinder scraping knife, then put the locking pin allocated;
9, drive roller, drive the driven plate cylinder rotation, through the scraping blade, in the big roller contacts with the plate cylinder form 'impression'. Conversion table packaging printing knowledge
proofing process characteristics of gravure proof press
( A) Gravure proof press
proofing operating sequence installation proofing materials proofing materials adjusting pressure to insert the dowel pin, ink to test the ink viscosity, install the plate cylinder to set the scraping blade pressure, the plate cylinder positioning - painted proofing ink - monochrome and color proofing to detect more proofing sample
( 2) Gravure proofing machine proofing process proofing, embossing roller by substrates on the pressure to make it close to the plate surface, separation of substrates will gravure mesh point of ink absorption, form the image. The stand or fall of image transfer in the outermost layers depends largely on the impression cylinder of rubber. Intaglio printing machines in the rubber roller outer rubber hardness is 65 shore hardness, hardness than the impression cylinder used in the printing company is a bit low. The impression cylinder of different hardness of pressure distribution is different, the lower hardness of cylinder under the same pressure under the action of deformation is greater than the hardness of big drum, rubber deformation produced by the elastic can make the substrates to produce elastic deformation, inconsistency between the substrates and gravure cylinder of large-area contact, will be more ink adsorbed to the surface of substrates.
hardness produced great impression cylinder deformation is small, with gravure roller contact area is small, substrates adsorption on ink is less. Rubber hardness is not the same, the printing quality in highlights part of the performance difference is more apparent, especially when paper proofing on the highlight part in outline.
this phenomenon with electric engraving mesh point of v-shaped structure has much to do. When the machine proofing device, added a secondary electrostatic can well solve the problem of specular white dots. Alignment device occupies very important position in the concave prototype, first, for it has a good alignment precision. Once the alignment error is greater than zero. 2 mm, concave sample electricity points on the graph effect will be affected by a lot of. General requirements of concave prototype first lap alignment error proofing cannot exist.
each color has finished, below the impression cylinder of a positioning block gauge can make the impression cylinder stop in its last stop position, when the impression cylinder with gravure cylinder near again, they squeezed the location of the point with the last point of extrusion is a cause, guarantee the alignment precision of proofing. Domestic copy machine is a big defects do not pass on the alignment precision. Second, the alignment device with great flexibility. Gravure cylinder length difference is large, short only 400 mm, long may be up to 1600 mm, and registering line in the version of the drum without a fixed position, some on the design, some simply without registering. The version of the drum as long as you can to pull machine, requires that hit a sample of alignment precision, thus, kumite prototype alignment device flexibility requirement is high.
for multicolor alignment, color proofing effect, must coordinate the following process:
1, the substrate must be under a certain tension, parcel to the roller;
2, the first color plate cylinder is installed between two heart clamp head or the swing arm bearing;
3, move the big drum, close to the surface of the plate cylinder, turning to the lock position, use the pin needle fixed to make it in a safe state;
4, turn the plate cylinder, aim the set of huai town horizontal gauge line roller surface carved horizontal line;
5, the big drum on the plate cylinder and achieve certain pressure;
6, check the alignment state, repeatedly, until completely alignment gauge line;
7, scraping knife adjustment to and roller surface form appropriate parallelism, which can adjust the vertical direction again, so that good scraping;
8, will ink coating on the surface along the cylinder scraping knife, then put the locking pin allocated;
9, drive roller, drive the driven plate cylinder rotation, through the scraping blade, in the big roller contacts with the plate cylinder form 'impression'. Conversion table packaging printing knowledge
Custom message
