CN103786421B - Centrifugal type non-contact wetting device of offset machine - Google Patents
Centrifugal type non-contact wetting device of offset machine Download PDFInfo
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- CN103786421B CN103786421B CN201410059360.9A CN201410059360A CN103786421B CN 103786421 B CN103786421 B CN 103786421B CN 201410059360 A CN201410059360 A CN 201410059360A CN 103786421 B CN103786421 B CN 103786421B
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- water
- roller
- bucket
- barrel
- main
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Abstract
The invention discloses a centrifugal type non-contact wetting device of an offset machine. The centrifugal type non-contact wetting device is used for supplying water to a main water roller of the offset machine. The main water roller transmits water to a printing plate on a printing plate barrel through a water roller set. The wetting device comprises a water hopper, and the water hopper is provided with a water spraying port facing the main water roller. A mesh barrel is installed in the water hopper, the inner wall of the mesh barrel is provided with a water absorption material layer, the water hopper is internally provided with a water spraying device, the mesh barrel is connected with a power device driving the mesh barrel to rotate, the mesh barrel is driven by the power device to rotate at a high speed to throw water away via centrifugal force so that the water can be supplied to the main water roller, the main water roller transmits the water to the printing plate on the printing plate barrel through the water roller set, the advantages of non-contact wetting are reflected, printing ink cannot flow reversely, the stepless speed change for the water supplying quantity can be achieved by controlling the revolving speed of the mesh barrel, the water quantity can be accurately controlled, and printing quality is improved.
Description
Technical field
The present invention relates to a kind of printer, particularly a kind of damping device of offset press.
Background technology
The principle of lithographic printing (also referred to as offset printing) is that profit is immiscible.Water on the space of a whole page of forme is first given, upper water is during printing
Towards whole plate surface, because the mechanism and cause of forme, the forme whole space of a whole page only has during water the blank parts on forme
Moisture can be adsorbed onto, even and if the areas on forme run into moisture, moisture nor be attached to areas, then give again
Forme inking, inking is also towards whole plate surface, because the blank parts of plate surface have been attached to moisture, profit
Immiscible, blank parts now can not adhere to ink, and areas are not because just have adsorption moisture, now
Can be very good to adsorb ink, then, on the surface of forme, it is the formation of two big regions, the moisture of white space absorption, picture and text
The ink of partial adsorbates, this just defines the development of image in plate surface.In the presence of squeegee pressure, successively to rubber
Cloth, the paper on impression cylinder carries out ink transmission, completes to print, to the device of water on forme, referred to as damping device.
At present, the damping device that domestic and international offset press is adopted is generally divided into two big class, and a class is contact moistening dress
Put, another kind of is contactless damping device.Contact moistening be exactly fountain solution in bucket in the transmittance process to forme,
All kinds of contacting with each other of damping roller are relied on to complete moisture transmission.Contactless damping device it is simply that fountain solution in bucket to
In the transmittance process of forme, it is not all of relying on all kinds of contacting with each other of damping roller and completes moisture transmission, but in certain transmitted
In the individual stage, make moisture depart from a upper carrier, voluntarily shift to next carrier, no longer directly contact between this two carriers, such as public affairs
The number of opening is cn1611351a, contactless damping device etc. disclosed in the patent document of entitled moistening water feeder.
The deficiency of contact moistening is it will be apparent that in the contacting with each other of each damping roller, moisture completes from bucket
To the transmission of plate surface, meanwhile, on forme, the ink of remaining, also during contacting with each other, has inversely been delivered to water
In bucket, pollute the fountain solution of bucket, make the hydraulic performance decline of fountain solution, and then have influence on printing quality.
Noncontact moistening changes this deficiency, because a certain intermediate link of transmittance process is that damping roller does not contact, disconnects
The reverse transmission of ink, thus ensure that fountain solution in bucket composition pure, but existing noncontact damping device is main
It is roller type brush and water jet (such as Publication No. cn1611351a, disclosed in the patent document of entitled moistening water feeder
For water jet), both moistening modes yet suffer from certain deficiency, and such as carrying capacity is difficult to precise control, regulated quantity change
The phenomenon such as narrow.
Content of the invention
In order to overcome the deficiencies in the prior art, the present invention provides a kind of output to be accurately controlled, and improves printing quality
Offset press centrifugal noncontact damping device.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of centrifugal noncontact damping device of offset press, supplies water for the main damping roller to offset press, described main damping roller leads to
Cross on the forme Water transport to plate cylinder from damping roller group, described damping device includes bucket, described bucket is provided with direction
The water jet of described main damping roller, is provided with net cylinder in described bucket, the inwall of described net cylinder is provided with absorbent material layer, described water
It is provided with water injector, described net cylinder is connected with the power set driving it to rotate in bucket.
Described absorbent material layer is water absorption Water wool jacket.
Described water injector is the water pipe being arranged on described net cylinder axle center, and described water pipe is provided with some evenly distributed sprays
Water hole.
The invention has the beneficial effects as follows:
Net cylinder is installed in the bucket of the present invention, the inwall of net cylinder is provided with absorbent material layer, is provided with water spray in bucket
Device, the water that water injector sprays adsorbs in absorbent material layer, under the drive of power set, net cylinder high-speed rotation, utilize
Moisture content is thrown away by centrifugal force, supplies water to main damping roller, and main damping roller passes through on the forme Water transport to plate cylinder from damping roller group, body
Showed the advantage of noncontact moistening, ink will not reverse backflow, by control net cylinder rotating speed, it is possible to achieve the nothing to output
Level speed change, the size of the precise control water yield, improves printing quality.
Brief description
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is offset press water-supply structure schematic diagram；
Fig. 2 is damping device structural representation；
Fig. 3 is the a-a direction sectional view of main damping roller, absorbent material layer and water pipe in Fig. 2.
Specific embodiment
Referring to figs. 1 to Fig. 3, a kind of centrifugal noncontact damping device of offset press, supply for the main damping roller 6 to offset press
Water, described main damping roller 6 passes through on the forme Water transport to plate cylinder 8 from damping roller group 7, and described damping device includes bucket 1,
This bucket, close to closed, is only provided with water jet 5, peace in described bucket 1 in bucket 1 towards the position of described main damping roller 6
Equipped with net cylinder 3, this net cylinder 3 is suitably the metallic cylinder with hole pattern such as rustless steel, and the inwall of described net cylinder 3 is provided with absorbent material
Layer 4, described absorbent material layer 4 is the water absorption Water wool jacket being attached to net cylinder 3 inwall.It is provided with water injector in described bucket 1,
Described water injector is the water pipe 2 being arranged on described net cylinder 3 axle center, and described water pipe 2 is provided with some evenly distributed hole for water sprayings
9, in work, water pipe 2 does not rotate with net cylinder 3.
Described net cylinder 3 be connected with drive its rotate power set, this power set be scalable rotating speed brushless electric machine,
Gear-box etc..
The damping device of the present invention is the advantage embodying noncontact moistening first, ink will not reverse backflow, secondly, lead to
Cross the rotating speed controlling net cylinder, it is possible to achieve the infinitely variable speeds to output, the size of the precise control water yield.
In printing process, according to the demand of printing, the size of precise control output is very important.Number to be printed is got over
Greatly, water requirement is bigger, and number to be printed is bigger, and the rotating speed being embodied directly in printer is faster, and the present invention is directly output
Size adjustment mode is set to the rotating speed size of net cylinder, is easy to corresponding with the rotating speed of printer, realizes the precise control water yield
Size, improves printing quality.
Claims (3)
1. the centrifugal noncontact damping device of a kind of offset press, supplies water for the main damping roller (6) to offset press, described main damping roller
(6) by from damping roller group (7) by the forme on Water transport to plate cylinder (8) it is characterised in that described damping device includes water
Bucket (1), described bucket (1) is provided with the water jet (5) towards described main damping roller (6), is provided with net cylinder in described bucket (1)
(3), the inwall of described net cylinder (3) is provided with absorbent material layer (4), is provided with water injector, described net cylinder in described bucket (1)
(3) it is connected with the power set driving it to rotate.
2. the centrifugal noncontact damping device of offset press according to claim 1 is it is characterised in that described absorbent material layer
(4) it is water absorption Water wool jacket.
3. the centrifugal noncontact damping device of offset press according to claim 1 is it is characterised in that described water injector is
It is arranged on the water pipe (2) in described net cylinder (3) axle center, described water pipe (2) is provided with some evenly distributed hole for water sprayings (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410059360.9A CN103786421B (en) | 2014-02-21 | 2014-02-21 | Centrifugal type non-contact wetting device of offset machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410059360.9A CN103786421B (en) | 2014-02-21 | 2014-02-21 | Centrifugal type non-contact wetting device of offset machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103786421A CN103786421A (en) | 2014-05-14 |
| CN103786421B true CN103786421B (en) | 2017-01-18 |
Family
ID=50662683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410059360.9A Expired - Fee Related CN103786421B (en) | 2014-02-21 | 2014-02-21 | Centrifugal type non-contact wetting device of offset machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103786421B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114801428B (en) * | 2022-05-11 | 2023-09-05 | 上海瑞源印刷设备有限公司 | Continuous transmission alcohol dampening device for metal plate offset press |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3990365A (en) * | 1975-09-17 | 1976-11-09 | Paulson Harold E | Cylinder moistening device |
| DE10053305C2 (en) * | 2000-10-27 | 2003-02-27 | Weitmann & Konrad Fa | Liquid applicator |
| JP2002361825A (en) * | 2001-06-08 | 2002-12-18 | Mitsubishi Heavy Ind Ltd | Dampening apparatus |
| DE10213109B4 (en) * | 2002-03-23 | 2005-02-17 | Baldwin Germany Gmbh | Printing machine spraying device |
| DE102004051342A1 (en) * | 2004-10-21 | 2006-05-04 | Richard Munz | Dampening unit for moistening printing plates |
| FI118420B (en) * | 2006-03-21 | 2007-11-15 | Veslatec Oy | Spray humidifying system for printing presses |
| DE102008030779A1 (en) * | 2008-06-28 | 2009-12-31 | Georg Schneider | Spray module for an offset printing machine |
-
2014
- 2014-02-21 CN CN201410059360.9A patent/CN103786421B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN103786421A (en) | 2014-05-14 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170118 |