CN102026809B

CN102026809B - Roller for an inking system of a printing machine

Info

Publication number: CN102026809B
Application number: CN200980115379.8A
Authority: CN
Inventors: T·霍林斯
Original assignee: Goss Graphic Systems Ltd
Current assignee: Goss Graphic Systems Ltd
Priority date: 2008-04-29
Filing date: 2009-04-28
Publication date: 2013-01-02
Anticipated expiration: 2029-04-28
Also published as: EP2300230A1; EP2300230B1; JP2011518696A; CN102026809A; WO2009133118A1; GB0807770D0

Abstract

A roller to contact an oscillating ink transfer drum in an inking system for a printing machineis disclosed. Itcomprisesa cylindrical body having a longitudinal axis and a curved outer surface. A recess is formed in the curved outer surface at an end of the cylindrical bodythatextendsaxially inward from said end of the cylindrical body by a depth that gradually reduces in a circumferential direction extending around said axis.

Description

The roller that is used for the ink feeding system of printing machine

Technical field

The present invention relates to a kind of roller of the ink feeding system for printing machine.More specifically, it relates to a kind of distributor rollers that rolls against oscillatory type ink transfer drum in the ink feeding system of printing machine.

Background technology

Rotary press comprises plate cylinder and blanket cylinder.Forme is mounted to plate cylinder and is used for base map is transferred to the blanket cylinder of contact print medium to print resulting image.China ink is supplied to the forme that is installed on the plate cylinder by ink donor unit.The ink donor unit of conventional offset press comprises a wavers, the inking roller that the forme on comprising two or three and being installed in plate cylinder rolls mutually and engages.Inking roller can operate when forme rotates China ink to be supplied to forme.Yin Mo is supplied to inking roller via this wavers from ink fountain.

In conventional ink feeding system, each inking roller rolls mutually with main even China ink drum and engages.China ink is supplied to main even China ink drum and is sent to inking roller from main even China ink drum via auxiliary drum and transfer roller from ink fountain.Prove that a kind of mechanism causes main even China ink drum and auxiliary even China ink drum vibrating along the direction of its longitudinal axis width of printing machine (namely along), thereby because their rotations so that black transverse shifting guaranteeing the even distribution of China ink on inking roller, and thereby forme be subjected to evenly distribute on the territory, ink-covered area.Even China ink drum has different diameters with transfer roller.

Owing to China ink is conveyed through auxiliary distributor rollers nonoscillatory of sparing the China ink string between China ink drum, main even black drum and the inking roller, the problem that excessive China ink can be pushed to the end of vibration drum and roller and form black pearl in the end of distributor rollers will occur so.This excessive China ink can fly away from drum and/or roller and cover other machine parts, and the waste China ink is also so that machine is dirty.

Summary of the invention

The present invention attempts to overcome or significantly alleviates the problems referred to above.

According to the present invention, provide a kind of ink feeding system for printing machine will with the contacted roller of oscillatory type ink transfer drum, this roller comprises the cylindrical body with longitudinal axis and crooked outer surface, its center dant is formed in the crooked outer surface at an end place of cylindrical body, and recess is centering on the degree of depth that reduces gradually on the circumferencial direction of described axis from the described end axis of cylindrical body to extending internally one.

In a preferred embodiment, recess configuration is for it reaches the end of cylindrical body or merges with this end so that its degree of depth reduces in a circumferential direction gradually.

Recess can be constructed so that its degree of depth reduces at 180 degree or more low-angle circumferencial direction.

In one embodiment, recess is that end axis from cylindrical body is to the first recess that extends internally and the second recess, the second recess degree of depth that reduces gradually on the circumferencial direction identical with the first recess around described axis that axially extends internally, wherein the degree of depth of the second recess is at 180 degree or more low-angle circumferencial direction reduces and spaced apart with described the first recess in a circumferential direction.

If have two recesses, the starting point of its degree of depth maximum of the second recess is spent around the circumference of cylindrical body and the starting point interval 180 of its degree of depth maximum of the first recess so.

Each recess can have the wall that radially extends, and described wall limits the continuous curve surface that extends in a circumferential direction around longitudinal axis.

It is spiral-shaped that continuous curve surface is preferably.

In particularly preferred embodiment, recess or the first and second recesses are formed in the two ends of crooked outer surface of cylindrical body.Most preferably, the recess at every end place is mirror image each other, and namely distributor rollers about passing the straight line symmetry that roller extends medially with its rotation with meeting at right angles.

According to a further aspect in the invention, a kind of ink feeding system for printing machine is provided, it comprises according to roller of the present invention and the ink transfer drum with curved surface, this roller has the first diameter and the ink transfer drum has the Second bobbin diameter different from the first diameter, the curved surface of described roller contacts so that described ink transfer drum and roller rotate that China ink is roused from roller transfer to ink transfer with the curved surface of ink transfer drum, and the China ink that described ink transfer drum is configured to during rotation vibrate in the axial direction with institute's transfer printing distributes on its curved surface in the axial direction equably.

In one embodiment, the degree of depth of recess is reducing when the end of roller is observed in the counterclockwise direction gradually, and roller is configured to rotate in the counterclockwise direction that China ink is roused from roller transfer to ink transfer.

Description of drawings

Fig. 3 now with reference to accompanying drawing only describes embodiments of the invention by way of example, wherein:

Fig. 1 is the side view of the even China ink drum of the oscillatory type of the conventional ink feeding system of component part and distributor rollers;

Fig. 2 is the partial enlarged view of an end of the even China ink drum of oscillatory type shown in Figure 1 and distributor rollers; And

Fig. 3 is the perspective view according to an end of the distributor rollers of the embodiment of the invention.

The specific embodiment

Referring now to accompanying drawing, the part 1 of ink spreader or the China ink string of the ink feeding system that is used for printing machine has been shown among Fig. 1, it comprises even black drum 2 and distributor rollers 3.The shaped form periphery of distributor rollers 3 places and contacts with the curved surface of even black drum 2 so that the China ink on the distributor rollers 3 is transferred into and spares black drum 2 when even black drum 2 rotate around its longitudinal axis " B " around its longitudinal axis " A " rotation and distributor rollers 3.Will appreciate that distributor rollers 3 and even black drum 2 have different-diameter as routine, is not to be enhanced but owing to

roller

2,3 advance and eliminate when they rotate with any pattern in the lip-deep China ink of guaranteeing to be formed at roller 3 or to spare black drum 2.

Even black drum 2 is installed as so that it can be when rotated in axially (direction of arrow among Fig. 1 " X ") vibration.Limit of sports record being shown in dotted line by 2a and 2b mark of even China ink drum.This vibration of even black drum 2 is well known in the art and is used on width the China ink movement being crossed the surface of even black drum 2 to guarantee uniformly black layer of plate cylinder that is transferred into printing machine.The frequency of vibration generally in interval between 3.5 and 4 hertz and the degree of vibration can be in the magnitude of about 25mm.

The zoomed-in view of the left hand end of even black drum 2 and distributor rollers 3 is shown in Figure 2, can understand thus, and during the vibration and rotation of drum 2 and roller 3, excessive China ink is pushed to the end and forms black pearl 4, and it is formed between even black drum 2 and the distributor rollers 3.This excessive China ink can splash from roller 3.

End according to the improved distributor rollers 5 of the embodiment of the invention is shown in Figure 3.Although an end of roller 5 only is shown, will appreciate that the other end of roller 5 can have identical structure.Ideally, the other end has the recess of mirror image and rotates so that roller can be installed as in either direction.Arrow " X " direction that preferred ground roll 5 is installed as in Fig. 3 is rotated, and rotates but can imagine that it can be installed as in either direction.

If see that from Fig. 3 the end of roller 5 is provided with recess, shoulder or cut-out 6, its end wall 7 from roller 5 extends internally and extends about 180 degree or less angles around the circumference of roller 5.Second identical recess, shoulder or cut-out 8 extend and are shown in broken lines in the drawings around all the other circumference of roller 5.Described recess or each recess roughly have " sawtooth " shape.

Recess 6 has depth capacity at the some place shown in the arrow " D ", namely roller as shown in the figure the time 12 positions." degree of depth " refers to recess 6 here from the Extendible Extent of end wall 7 on axial inward direction.Depth capacity " D " can be in the magnitude of about 16mm or in the only about half of magnitude that is oscillation distance.The degree of depth of recess 6 (namely in the counterclockwise direction) on the circumferencial direction around described Axis Extension reduces gradually, as shown in the figure, until its remittance or run into end wall 7.The second recess 8 has its depth capacity (by arrow " E " indication) in the position around circumference 180 degree of roller 5.

Each recess 6,8 has radially the diapire 9 that extends, and it is limited to the continuous curve surface that extends on the circumferencial direction of the longitudinal axis B of distributor rollers 5.In a preferred embodiment of the invention, this surface is spirality.Wall 9 has edge 9a.

Whether during rotation, will appreciate that Mo Zhuke still is formed on the surface of even black drum 2, but circumferentially extend around drum and its rotation ground that meets at right angles that it follows the inclination or the local spiral path that center on circumference that the top edge 9a by wall 9 limits now.For this cause, at least a portion of pearl in subsequently revolution because even black drum 2 and distributor rollers 3 advancing and " ground " continuously or pick up by distributor rollers 3 when it rotates, therefore the China ink that forms pearl is retracted in the main body of China ink continuously, thereby keeps the China ink of one deck substantial constant thickness on the surface of even black drum 2 and distributor rollers 3.

Will appreciate that aforementioned description only provides by way of example and can carry out modification to distributor rollers of the present invention under the scope that does not break away from claims.

Claims

1. one kind at the ink feeding system that is used for printing machine and the contacted roller of oscillatory type ink transfer drum, described roller comprises the cylindrical body with longitudinal axis and crooked outer surface, its center dant is formed in the described crooked outer surface at the place, end of cylindrical body, recess is from the described end axis of cylindrical body to extending internally, and the degree of depth of extending is reducing on the circumferencial direction of described longitudinal axis gradually.

2. according to claim 1 roller, wherein recess configuration for so that its degree of depth reduce gradually in a circumferential direction until arrive the end of cylindrical body.

3. according to claim 1 and 2 roller, wherein recess configuration for so that its degree of depth reduce at 180 degree or more low-angle circumferencial direction.

4. according to claim 3 roller, wherein said recess is that end axis from cylindrical body is to the first recess that extends internally and the second recess, the degree of depth that the second recess axially extends internally is reducing on the described longitudinal axis circumferencial direction identical with the first recess gradually, and wherein the degree of depth of the second recess is spent or more low-angle circumferencial direction reduces and spaced apart with described the first recess in a circumferential direction 180.

5. according to claim 4 roller, wherein the starting point of the degree of depth maximum of the second recess is spent with the starting point interval 180 of the degree of depth maximum of the first recess around the circumference of cylindrical body.

6. according to claim 1 and 2 roller, wherein said recess or each recess have the wall that radially extends, and described wall is limited to the continuous curve surface that extends on the circumferencial direction of longitudinal axis.

7. according to claim 6 roller, wherein continuous curve surface is spiral-shaped.

8. according to claim 1 and 2 roller, its center dant or the first and second recesses are formed in the two ends of crooked outer surface of cylindrical body.

9. ink feeding system that is used for printing machine, the ink transfer drum that it comprises roller and has curved surface, described roller comprises the cylindrical body with longitudinal axis and crooked outer surface, its center dant is formed in the described crooked outer surface at the place, end of cylindrical body, recess is from the described end axis of cylindrical body to extending internally, the degree of depth of extending is reducing on the circumferencial direction of described longitudinal axis gradually, described roller has the first diameter and the ink transfer drum has the Second bobbin diameter different from the first diameter, the crooked outer surface of described roller contacts so that described ink transfer drum and roller rotate that China ink is sent to the ink transfer drum from roller with the curved surface of ink transfer drum, and described ink transfer drum is configured to during rotation vibrate in the axial direction be uniformly distributed in the axial direction on its curved surface with the China ink that will be transmitted.

10. according to claim 9 ink feeding system, wherein when observing from the end of roller, the degree of depth of recess reduces in the counterclockwise direction gradually, and roller is configured to rotate in the counterclockwise direction that China ink is sent to the ink transfer drum from roller.