| Offset printing process control in the packaging, | | | | decreased. This is called a blanket of stress |
| printing pressure is one of the more complex | | | | relaxation. Stress relaxation demonstrated in |
| technology. Offset the pressure from the blanket | | | | particular in the new-for-a blanket on. So the new |
| and the compression liner material arising from | | | | can not be a blanket in the facelift, when |
| elastic deformation. Therefore, the rational use of | | | | stretched too tightly, to co-pressure printing for |
| the blanket is to control the offset stress a | | | | some time, once again tightened. This must be |
| priority. Blanket is essential for the production of | | | | repeated until no 2 ~ 3 times. Can the |
| offset printing packaging is an important raw | | | | phenomenon of stress relaxation weakened, |
| material, one of the reasonable use of the | | | | blanket degree of tension remained stable over |
| maintenance can prolong the life of blanket to | | | | an extended period. |
| reduce production costs. At the same time can | | | | 2, the correct measurement of Blanket |
| guarantee the print quality requirements offset | | | | Offset, the printing pressure is usually the size of |
| package. Here to talk about the characteristics of | | | | the drum with bag lining pressure on the blanket |
| the blanket and the rational use of such issues. | | | | together, the maximum amount of compression |
| First, the types and characteristics of blanket | | | | to represent. Its unit is mm. Therefore, the |
| Currently in printing blanket used in common can | | | | proper measure is to calculate the thickness of |
| be divided into: air-cushion-type blankets and | | | | the lining package printing pressure on the key. As |
| ordinary type Blanket 2 major categories. | | | | the tension on the blanket in the drum, elongation, |
| Common type blanket, it is by the end of cloth, | | | | will result in reduced Pu layer thickness decrease. |
| elastic rubber adhesive and surface layer | | | | Therefore, in the absence of blanket to blanket |
| composition. As the rubber itself has the | | | | cylinders mounted on the states and installed in |
| characteristics of the volume can not be | | | | the blanket cylinders, this two kinds of state of |
| compressed, when the compression of the | | | | the measured thickness values are not the same. |
| surface layer, it will cause in the imprint area | | | | Therefore, to correctly calculate the bag lining the |
| around the convex hull. | | | | value of a good blanket is best measured by the |
| The convex hull of this phenomenon makes the | | | | instrument barrel. |
| offset of the embossed contact area after the | | | | But at present a lot of printing, and not equipped |
| week ahead at half maximum on the arc through | | | | with cylinder through the instrument. Is usually |
| the (convex hull of Department) and the smallest | | | | measured with the micrometer thickness of |
| semi-through (arc midpoint) a big difference. The | | | | blanket and liner material. As the micrometer is |
| result was blanket cylinders and plate cylinder | | | | not installed in the drum blanket state of the |
| between; and blanket cylinders and the impression | | | | measured data, so the operator should blanket |
| cylinder when the sliding between the imprint | | | | installed on the drum after the tension is not |
| increased to the point that dot gain distortion, | | | | installed prior to the thickness and the thickness |
| making the transfer of the entire graphic print | | | | of the poor, there must be a correct estimate. |
| quality. | | | | Greater pressure in order not to appear bias. |
| In addition to the end of air-cushion-type | | | | Relatively speaking soft liner over the pressure |
| blanket fabric, elastic rubber adhesive, the surface | | | | differential impact on smaller, but more than for |
| layer outside the surface layer is also to increase | | | | the rigid liner pressure differential impact on the |
| the micro-porous layer of foam sponge. | | | | larger. |
| Micro-microporous foam layer is formed by | | | | 3, blanket installation |
| numerous tiny closed air layer of the ball | | | | Should pay attention to correctly distinguish |
| dispersed. When the blanket the surface layer | | | | between the use of blanket blanket of the latitude |
| under pressure, the micro-bubble in the air the ball | | | | and longitude direction. To blanket around the |
| under pressure, reduce the size of their own, so | | | | cylinder through the axis in order to achieve |
| blanket only given rise to vertical compression. | | | | printing results. Because it is not easy blanket |
| Variants are no longer around to the imprint area | | | | stretched variant. Easy to stretch the blanket side |
| on both sides of the development. In the | | | | of the zonal type. Therefore, the direction of |
| embossing process does not generate the | | | | blanket silk strand must not be blind to install. |
| convex hull of the phenomenon. Thereby reducing | | | | General blanket behind a clear sign silk strand, if a |
| the time of sliding in the imprinting situation. | | | | red or blue warp, with the warp on the roller axis |
| Network transfer and the transfer of the | | | | perpendicular to. Blanket cut, we should pay |
| entire graphics high accuracy. In particular the | | | | attention as being from the type, on both sides |
| transfer of multi-color offset press outlets | | | | of the same length. Into wooden planks on both |
| expansion rate could be reduced. Tone and color | | | | sides should be parallel. Then the blanket taut, it |
| correctness of the high reduction. Allows greatly | | | | will not side of the tight and loose side. |
| improved the quality of printed graphics. As the | | | | Also note that the center distance of rollers on |
| air-cushion-type blankets are porous layer, so it is | | | | both sides must be equal. Otherwise, they may |
| better than the ordinary type blanket sensitivity | | | | make blanket cylinders relative to the impression |
| flexibility, reversibility, and impact resistance. | | | | cylinder or a printing plate cylinder axis is not |
| Multi-color offset press in the printing pressure can | | | | parallel to the side of the pressure blanket big |
| make the pressure stability. Of course, air-cushion | | | | forward drive, the other side of the pressure on |
| blanket and ordinary blankets bring costs in terms | | | | the small forward in time more slowly, the most |
| of price increase. | | | | general to make rubber cloth produced reverse. |
| Common type blanket it can be offset in the | | | | Makes the print outlets variant of the poor quality |
| monochrome printing or in the field to use. | | | | of Indian goods. |
| Generally soft cushioning material is used, printed | | | | 4, blanket cleaning and maintenance of |
| some ordinary printed matter. Because relatively | | | | Over a period of time printing, the blanket surface |
| speaking compressed print a large amount of | | | | because of physical absorption, adhesion of many |
| network expansion rate as well. If it is multi-color | | | | paper wool, paper powder and ink skin |
| offset printing, generally using air-cushion-type | | | | accumulation. If there is no timely cleaning of thick |
| blanket with neutral or hard liners such amount of | | | | paper paper hair powder, it will increase pressure |
| compression is small, dot gain little. If the cushion | | | | on local printing. Blanket occurred there makes |
| pad of soft material used to make blanket bag | | | | more of plastic deformation. Will accumulate over |
| lining, then the amount of compression will be a | | | | time at local depression. Therefore, the printing |
| whole big, dot gain easy spreading. So it will offset | | | | paper produced hair, paper powder, paper, ink |
| the air-cushion blanket itself, the advantages of | | | | skin and so on, for special attention to timely and |
| high precision network transfer. Therefore, we | | | | clean water. |
| should also note that while the use of blanket lining | | | | Blanket with a light and heat aging characteristics. |
| package with the nature. | | | | The blanket purchase black paper packaging |
| Second, the rational use of blanket | | | | should be stored in a cool place. Blanket cleaning |
| 1, correctly tension Blanket | | | | faster due to use of volatile solvents. If the |
| Blanket must be properly fastened under tension | | | | volatile solvent slowly make blanket blanket wash |
| force on the blanket cylinders. If the blanket | | | | solvent and then aging accounts. Therefore, a |
| stretched too loose, the imprint would have | | | | solvent wash cloth rubber skin will certainly need |
| squeezed out when the displacement can not be | | | | to clean. India and exhausted for a particular |
| reset in time. Will lead to ghosting blanket failure | | | | product, if encountered in a long time to shut |
| occurred, of course can not be over-stretched | | | | down, to release the blanket of the tension |
| too tightly. The blanket will lead to tight layer | | | | device, so that blanket to relax, have a |
| thinning, flexibility to reduce and eventually to | | | | preventive effect of stress relaxation blanket. |
| have enough pressure. But also accelerate the | | | | In short, the blanket will offset the packaging |
| aging of blanket, so that the transfer of ink | | | | materials used in one, and it offset the quality of |
| undesirable phenomena occur, affecting the quality | | | | products have great impact. As a packaging and |
| of products, but also shorten the life of the | | | | printing workers, not this half-hearted, will Xu |
| blanket. | | | | arouse our attention. Work, especially in |
| Fastening the rubber blanket cylinder on its own | | | | peacetime continue to be studied and analyzed. At |
| will produce tension within the stress and tension it | | | | the same time to sum up the experience, but |
| to compete. Internal stress will be gradually | | | | also to consult my colleagues around, so that |
| extended over time by Mino. So that tension | | | | blanket to get proper and reasonable use. |