KR20090091066A - Printing unit for web printing press - Google Patents

Abstract

A printing unit for a web printing press is provided to rapidly replace a sleeve by disassembling a supporting part of an anilox roller from a drive screw and a mandrel. A printing unit for a web printing press comprises a board cylinder(2), an anilox roll(4), and a drive screw(6). The anilox roll is pivotally mounted on two supporting members(3). The anilox roll moves the ink to the board cylinder by compressing the board cylinder. The drive screw is connected to the supporting member. A supporting members are translated to the drive screw. The supporting member comprises one or more steering wheel(8). The steering wheel is mounted on one place of the supporting member.

Description

Printing unit for web printing press

The present invention relates to a printing unit for a web printing press.

As is known, a printing press has a plurality of printing units through which the web material to be printed is fed, wherein the web material consists of paper, cardboard, self-adhesive paper, plastic, or synthetic laminate webs. Can be.

Each printing unit serves to apply color to the web material and actually has three sets of rollers through which the web material (hereinafter referred to as film) is fed in between and the color is transferred over it.

These three roller sets have inking rollers or anilox rolls, in particular having a plurality of cells for containing ink on their outer surface. Anilox Roll is a cylinder suitable for filling an Anilox Roll's cell, a cylinder that is soaked directly from a so-called "enclosed doctor blade" or by collecting ink from a rubber roller that is enclosed in a special fan to sell this ink. And then apply it to the film fed between the plate cylinder and a large impression cylinder or drum.

The detailed structures of the various rollers of the printing unit are no longer described as they are known per se and in no case form a particular subject matter of the present invention.

The aforementioned three rollers of the printing unit have a structure in which their axes are parallel to each other and entirely horizontal. In a printing unit, the impression cylinder belongs to a fixed structure of the machine, which is generally common to various printing units arranged along its periphery without requiring replacement or changing position, while anilox rolls and plate cylinders Frequent replacement or repositioning; For this reason, they are driven by screws mounted on a supporting member that slides on the frame of the press and mounted and fixed to the side portions of the frame of the press.

In particular, in most of the printing units presently present, replacement of the plate cylinder is required every time the format is changed, that is, the length of the outer surface of the cylinder is changed, and therefore a change in diameter is required.

In each change of the image that does not require a change in the diameter of the plate cylinder, only replacement of the plate with the new image is required.

According to the known art, the change of the sleeve of the plate cylinder and the anilox roll is long and complicated. In fact, the sleeve change occurs in two steps. In the first step the operator must release the end of the cylinder mandrel from its support member. In the second step, the operator must move the support member to make enough room to change the sleeve.

These steps are all complex. In fact, in the first stage, the operator has to work in tight spaces because of the presence of the supporting members. In the second step the operator has difficulty in moving the support member in that the drive screw is coupled to the support member and thus the movement of the support member is constrained to the operation of the drive screw.

It is an object of the present invention to overcome the drawbacks of the known art by providing a printing unit which is practical, versatile and capable of ensuring quick and easy change of sleeves of anilox rolls and plate cylinders.

In particular, it is an object of the present invention to quickly change the sleeve by releasing the support members of the plate cylinder and the anilox roll from the mandrel and from the drive screw.

These objects are achieved with a printing unit according to the invention with the features set forth in claim 1 of the appended independent claims.

Advantageous embodiments of the invention are described in the dependent claims.

The printing unit for a web printing apparatus according to the present invention,

A plate cylinder, rotatably mounted at its end on two support members mounted to slide horizontally on a linear guide integral with the side of the press structure, the printing web material being designed to press against the drum running thereon,

An anilox roll, rotatably mounted at its end on two support members mounted to slide horizontally on the linear guide, designed to press against the plate cylinder to move ink from the anilox roll to the plate cylinder, And

A drive screw operably connected to the support member to translate them.

The printing unit according to the invention can also be operated by an operator to release the support member from the end of the mandrel of the plate cylinder and from the drive screw and at least one handle mounted to at least one of the support member. It is provided.

In this way, the operator has, by means of the handle, the associated support member without having to drive the screw of the support member or interfere with the mandrel of the anilox roller or the plate cylinder, leaving enough space for changing the sleeve. Can be translated to translation.

The advantages of the present invention clearly allow for quick and easy replacement of the cylinder or sleeve.

Further features of the present invention will become more apparent from the detailed description set forth below purely by way of example, and therefore by the non-limiting embodiments illustrated in the accompanying drawings.

A printing unit according to the invention, shown generally by the reference numeral 100, is described with reference to the drawings. Although shown one by one, it should be understood that many of the parts shown in FIGS. 1-3 are pairs arranged symmetrically on two opposite sides of the press.

For clarity of understanding, the side of the press 100, which can be seen in FIGS. 1 to 3, is hereafter indicated as the operator side. In addition, the same or similar parts are denoted by the same reference numerals.

Referring now specifically to FIG. 1, the printing unit 100 is provided with an anilox roll or inking roller provided with a first pair of support members 1 suitable for supporting the plate cylinder 2 and a plurality of cells on its outer surface. And a second pair of support members 3 suitable for supporting (4). The support members 1, 3 are mounted on a recirculating ball or roller cartridge and then slidably mounted on a linear guide 5 arranged horizontally in the longitudinal direction of the press. The cartridge is integrally mounted to each of the supporting members 1, 3, and the guide 5 is integrally mounted to the side surface 50 of the press frame.

A container, designed to be filled with paint or ink and suitable for filling a cell engraved on the anilox roll 4 with paint or ink, a so-called "embedded doctor blade" (not shown) is called anilox roll 4 Is mounted on. The anilox roll 4 then moves the ink to the plate cylinder 2 pressed against the large-size impression cylinder or drum 7 which is totally motorized. A film of web material (not shown) running on the drum 7 passes the gap between the plate cylinder 2 and the drum 7 responsible for transferring the image.

The support members 1, 3 of the plate cylinder and the anilox roll are driven by respective ball screws 6 driven translationally by respective arm screws 60 rotatably mounted on the side 50 of the press. Driven. The female screw 60 is made to be rotated by the electric motor 66, possibly via belt transmission. The screw 6 is arranged longitudinally between the two guides 5. The side 50 of the press has a hole 51 through which the screw 6 passes. The hole 51 is large enough to allow insertion and / or removal of the sleeve of the anilox roll 4 or the plate cylinder 2 during the change of the sleeve.

According to the invention, the handle 8 protruding onto the operator side so as to be gripped by the operator is mounted on each support member 1, 3. The handle 8 is suitable for releasing each support member 1, 3 from each plate cylinder 2 or anilox roll 4 and from the drive screw 6.

A lock / release device 9 which can be actuated by the operator is also used on each support member 1, 3 to lock the handle 8 and release the handle 8 to change the sleeve during operation of the press. Is mounted.

FIG. 7 shows a sectional view taken along the horizontal cross section at the level of the axis of the plate cylinder 2, showing one of the two support members 1 of the plate cylinder, ie the support members 1 arranged on the operator side. . However, it should be understood that the support member 3 of the anilox roll disposed on the operator side actually has a similar structure.

The support member 1 has a transverse through hole 10 designed to receive the end 20 of the mandrel 21 supporting the sleeve 22 of the plate cylinder. Consistent with the transverse through arc 10, the support member 1 has a rearwardly projecting cylindrical tang 11 facing inward of the machine, also shown in FIG. 8, with the tang 11 being a mandrel. Has a side hole 12 suitable for allowing passage of the end 20 of the.

Returning also to FIG. 7, a longitudinal hole 13 in communication with the transverse hole 10 is formed in the support member 1. The longitudinal hole 13 is adapted to slidably receive the drive screw 6 and has a smaller diameter than the transverse hole 10. The longitudinal hole 13 is located in the vicinity of the rear surface of the support member 1.

A second transverse hole 14 is formed in the support member 1 in communication with the longitudinal hole 13 and open at the front surface of the support member 1. The second transverse hole 14 has a smaller diameter than the longitudinal hole 13 and is disposed at a distance from the first longitudinal hole 10. In particular, the second transverse hole 14 has a tapered end 15 in communication with the longitudinal hole 13.

The drive screw 6 has at its end a cylindrical block 61 fixed by an axial bolt 62. The cylindrical block 61 radially has a tapered hole 63 with a taper that is an exact extension of the tapered portion 15 of the second transverse hole 14. In order to act as a stop member, a sleeve 68 is provided on the screw 6 which provides a contact surface for the support member 1.

Referring also to FIG. 9, the handle 8 has a plate 80 protruding forward from there a U-shaped handgrip 81 suitable for being gripped by the operator's hand. The first tang 82 and the second tang 83 protrude rearward from two ends of the plate 80.

The first tang 82 has a sleeve 84 at its end having a circular seat 85 on which the end 20 of the plate cylinder mandrel can rotate. Ball or roller bearings are disposed in the seat 85 of the sleeve to facilitate rotation of the end 20 of the mandrel. The sleeve 84 of the handle has such a diameter so that it can be inserted into the first transverse hole 10 of the support member 1.

The second tang 83 of the handle is tapered holes 15, 63 formed in the end block 61 of the drive screw 6 and the second transverse hole 14 of the support member 1, respectively, and the cone coupling. It has a tapered end 86 suitable for engaging in a relationship.

A locking appendage 87 disposed in the central position between the two tangs 82, 83 protrudes rearward from the plate 80 of the handle. The locking device 87 is in the form of a plate bent in an L-shape, having a U-shaped hole 88 at its end.

4 and 8, the lock / release device 9 has a lever 90 which can be operated by an operator. The lever 90 has an end flange that supports a bolt 91 that can slide in a vertical groove 92 formed in a block 93 integral with the front surface of the support member 1. Block 93 is disposed between two holes 10, 14 of the support member for receiving two tangs 82, 83 of the handle. In this manner, when two tangs 82, 83 of the handle are disposed in the two holes 10, 14 of the support member, the bolt 91 engages the hole 88 of the locking device 87 of the handle. The handle 8 is integrally coupled to the support member 1.

The sleeve change operation portion formed in the printing unit 100 according to the present invention will now be described.

As shown in FIGS. 1, 4 and 4A, the handle 8 is initially integrally locked to the respective support members 1, 3 of the plate cylinder 2 and the anilox roll 4. In particular, the lever 90 of the lock / unlock device 9 allows the bolt 91 to engage the hole 88 of the lock of the handle 8 of the support member 1, 3 of the plate cylinder and the anilox roll. Is placed. In this situation, the lever 90 is inclined with respect to the vertical direction.

In conclusion, the end 20 of the mandrel of the plate cylinder and the anilox roll is coupled to the inside of each sleeve 84 of the handle to rotatably support the mandrel. The truncated conical end 86 of the tang of the handle is engaged in a tapered hole 63 at the end of each drive screw 6 to make the support members 1, 3 integral with the drive screw 6.

During printing, the plate cylinder 2 is in contact with the drum 7 and the anilox roll 4 is in contact with the plate cylinder 2.

When the sleeve is changed as shown in FIG. 2, the female screw 60 of the ball screw 6 is rotated to cause an axial translational movement of the screw 6. Thus, the support members 1, 3 of the plate cylinder 2 and the anilox roll 4 are moved together to the right so that the plate cylinder 2 is moved away from the drum 7. Thereafter, the translational movement of the screw of the plate unit is interrupted and the translational movement of the screw of the anilox unit is continued. As a result, the anilox roll 4 is moved away from the plate cylinder 2 to form a space of sufficient size to change the sleeve.

At this point, as shown in FIG. 5, the operator rotates the release lever 90 in the direction of arrow F1 to loosen the bolt 91, and the bolt 91 slides in the groove 92 to handle 8. Pull it downwards in the direction of arrow F2 to release the locking device 87. At this time, as shown in FIG. 5A, the operator grabs the hand grip 81 of the handle and pulls it toward him in the horizontal direction of arrow F3 to move it away from the support member 1.

As a result, the tangs 82, 83 of the handle slide in the respective holes 10, 14 of the support member 1. Thus, the end 20 of the mandrel 21 is released from the sleeve 84 and at the same time the truncated conical end 86 of the second tang 83 of the handle is tapered of the end block 61 of the screw 6. It is released from the hole 63. It should be noted that this is a single operation by the operator that the support member 1 is released from the mandrel 21 and from the screw 6.

At this point, as shown in FIGS. 3, 6 and 6A, the operator moves the support member 1 to the left by the handle 8 (in the direction of the arrow F4 in FIG. 6A), so that the plate cylinder The space for replacement of the sleeve 22 can be freed. It should be noted that the end 20 of the mandrel passes through the hole 12 of the tang 11 without interfering with the tang 11 of the support member 1. Moreover, the screw 6 does not interfere with the support member 1 in that the cylinder block 61 slides freely in the longitudinal hole 13 of the support member 1 at the end of the screw.

In any case, during its translational movement, the support member 1 is slidably supported on a linear guide 5 on the side of the press. When the support member 1 comes into contact with the stationary sleeve 68 mounted on the screw 6, there is enough space left for the discharge of the sleeve 22 and its replacement with the other sleeves of different formats.

When the sleeve is replaced, the operator pushes the support member 1 to the right by the handle 8 until the end 20 of the mandrel reenters the hole 10 of the tang 11 of the support member. In this situation, the truncated conical hole 63 of the end block of the screw 6 engages with the hole 14 of the support member 1. At this point, the operator pushes the handle 8 towards the support member 1. In this manner, the end 20 of the mandrel is joined at the sleeve 84 of the first tang 82 of the hand grip, and the tapered end 86 of the second tang of the hand grip is tapered at the end of the screw. In the hole (63). Finally, the operator operates the locking lever 90 such that the handle 8 is firmly locked to the support member 1.

Although FIGS. 4-9 show an embodiment regarding the change of the sleeve of the plate unit, it is clear that the changing sleeve on the anilox unit takes place in the same way; In fact, the support member 3 of the anilox unit is made in substantially the same way as the support member 1 of the plate unit.

However, the invention is not limited to the particular embodiments explicitly illustrated and described in the appended claims. Various changes may be made in detail within the capability of those skilled in the art, and it should be understood that all of these fall within the scope of the present invention, as described in the appended claims.

1 is a schematic side view showing a portion of the side of a printing apparatus in which a printing unit according to the invention is shown in an operational state and a printing impression cylinder is shown in dashed lines.

FIG. 2 is a view similar to FIG. 1 showing the printing unit in a separated position, where the plate cylinder and the anilox roll are separated from each other by a predetermined distance.

FIG. 3 is a view similar to FIG. 1 showing the printing unit in the sleeve change position with the support member moved away from each plate cylinder and anilox roll.

4, 5 and 6 show three enlarged views of the plate unit shown in FIGS. 1, 2 and 3, respectively.

4A, 5A, and 6A are three cross-sectional views taken along the horizontal plane of portions A-A of FIGS. 4, 5, and 6, respectively.

7 is a cross-sectional view similar to FIG. 4A but showing the plate unit of FIG. 4 in an exploded state.

8 is a perspective view of the plate unit of FIG. 4.

9 is a perspective view of a handle of the plate unit of FIG. 8.

<Description of Signs of Major Parts of Drawings>

1, 3: support member

2: plate cylinder

4: Anylock Roll

5: linear guide

6: drive screw

8: handle

20: end of the mandrel

82: the first tang

83: second tang

84: sleeve

100: printing unit

Claims (10)

Rotatably mounted at its end 20 on two support members 1 mounted to slide horizontally on a linear guide 5 integrally with the side 50 of the press structure, and a printing web material thereon Plate cylinder 2 designed to press against the running drum 7, Anilox rolls 4 are rotatably mounted at their ends 20 on two support members 3 mounted to slide horizontally on the linear guides 5 and against the plate cylinders 2. Any locks rolls 4 designed to move ink from the to cylinder 2, and In the printing unit 100 of the printing press for web material, which has a drive screw 6 operably connected to the supporting members 1, 3 to translate them, Can be operated by an operator to release the support members 1, 3 from the mandrel of the plate cylinder 2 or the end 20 of the anilox roll 4 and from the drive screw 6. And at least one handle (8) mounted on at least one of said support members (1, 3). The sleeve (8) according to claim 1, wherein the handle (8) has a sleeve formed with a seat (85) adapted to rotatably receive an anilox roll (4) and an end (20) of the mandrel of the plate cylinder (2). A first tang 82 which carries 84 at its ends, and And a second tang (83) to which an end thereof is coupled in the seat (63) of the drive screw (6). 3. The support member (1) (3) according to claim 2, characterized in that the support member (1, 3) has a first transverse through hole (10), through which the sleeve (84) of the handle (8) can slide; A longitudinal hole 13 into which the drive screw 6 can slide, and A second transverse hole 14 opening on the outer surface of the support member and in communication with the longitudinal hole 13, wherein the second tang 83 of the handle 8 is the second through hole 14. A printing unit for a web printing press, which can slide within a). The tapered seat (63) according to claim 2 or 3, wherein the second tang (83) of the handle (8) is formed radially in a cylindrical block (61) disposed at the end of the drive screw (6). And a tapered end portion 86 suitable for joining in a conical joining relationship. 5. The seat of claim 2, wherein the ball or roller bearing assembly is configured to rotatably support the end 20 of the mandrel. 8. The seat of the sleeve of the first tang 82 of the handle 8. A printing unit for a web printing press, wherein the printing unit is disposed in the (85). The support member (1) (3) according to any one of claims 2 to 5, which has a tang (11) which projects toward the inside of the press and is penetrated by the first transverse hole (10), The tang 11 has side holes 12 suitable for allowing passage of the end 20 of the mandrel of the plate cylinder 2 or the anilox roll 4 to print for web printing presses. unit. The locking / unlocking device (1) according to any one of claims 1 to 6, which can be operated by an operator to lock / unlock the handle (8) to / from the support members (1, 3). 9) a printing unit for a web printing press. 8. The lock / release device (9) according to claim 7, characterized in that the lock / release device (9) is provided with a lever (90) for actuating a bolt or pin (91) suitable for engaging in the lock seat (88) of the handle (8). Printing unit for a web printing press. 9. The female screw according to claim 1, wherein the female screw is rotatably mounted on the side surface 50 and is operated in rotation by the electric motor 66 to cause the translational movement of the drive screw 6. A printing unit for a web printing press, comprising: (60). 10. A web printing press comprising at least one printing unit (100) according to any one of the preceding claims.

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