JP3197996U - Plate cylinder for flexographic printing machines - Google Patents

Abstract

To provide a plate cylinder for a flexographic printing machine that reduces the manufacturing cost of a sleeve with a flexographic plate and reduces the storage space for the sleeve with a flexographic plate after use. A mandrel having a compressed air pipe provided therein, a cylindrical adapter attached to the outer peripheral surface of the mandrel, a sleeve mounted on the outer peripheral surface of the adapter, and an outer peripheral surface of the sleeve The flexographic plates 4a to 4d are provided. The sleeve 3 includes a plurality of sleeve portions 3a to 3d that are detachably coupled to each other. The flexographic plates 4a to 4d are provided independently for each of the sleeve portions 3a to 3d. When the mandrel 1 is supplied with compressed air and the adapter expands in the radial direction, the sleeve 3 is tightly fixed to the mandrel 1. [Selection] Figure 1

Description

  The present invention relates to an improvement of a plate cylinder used in a flexographic printing machine.

  Flexographic printing presses are classified into three types, stack type flexographic printing presses, CI (Center Impression) flexographic printing presses, and inline flexographic printing presses, depending on the arrangement method of the printing units of the printing press.

As shown in FIG. 4A, the stack type flexographic printing machine has a configuration in which printing units including an ink supply unit 10, an anilox roll 11, a plate cylinder 12 and an impression cylinder 13 are stacked independently in the vertical direction. In the CI-type flexographic printing machine, as shown in FIG. 4B, a single large-diameter common impression cylinder 14 is arranged at the center, and the ink supply unit 10 and anilox are arranged around the common impression cylinder 14. The unit comprising the roll 11 and the plate cylinder 12 is arranged independently.
In addition, as shown in FIG. 4C, the inline-type flexographic printing machine has printing units each composed of an ink supply unit 10, an anilox roll 11, a plate cylinder 12 and an impression cylinder 13 arranged independently on a straight line. It has a configuration.

FIG. 5 is a perspective view showing a configuration of an example of a plate cylinder used in these flexographic printing machines.
As shown in FIG. 5, the plate cylinder 12 of the flexographic printing machine includes a mandrel 1 having a compressed air pipe provided therein, a cylindrical adapter 2 attached to the outer peripheral surface of the mandrel 1, and an outer periphery of the adapter 2. The sleeve 3 is mounted on the surface, and the flexographic plate 4 is fixed to the outer peripheral surface of the sleeve 3.

  In this case, a mandrel 1 having a predetermined outer diameter is always attached to the frame of the printing press, and an adapter 2 having an appropriate thickness is attached on the mandrel 1 according to the repeat length of printing. A sleeve 3 having a diameter suitable for the adapter 2 and an appropriate thickness and having a flexo plate 4 (thickness constant) fixed thereto in advance is mounted on the adapter.

In this case, the flexographic plate 4 usually has a plurality of plate surfaces aligned in the axial direction of the plate cylinder 12 and is fixed onto the sleeve 3 via a cushion tape.
When the compressed air is supplied to the mandrel 1, the adapter 2 expands in the radial direction, whereby the sleeve 3 is tightly fixed to the adapter 2 and the setting of the plate cylinder 12 is completed. Thereafter, the operation of the printing press is started.

When the printing operation is completed, the operation of the printing press is stopped, and then the compressed air is discharged from the mandrel 1. Then, the flexographic plate 4 after use is removed together with the sleeve 3, and if necessary, the adapter 2 is also removed.
The flexographic plate 4 removed together with the sleeve 3 is stored in preparation for the next production of the same printed matter.

  Thus, according to the prior art, when the same printed matter as previously produced is produced, the stored flexographic plate 4 (attached to the sleeve 3) is used as it is, while When various types of printed matter are manufactured, the flexographic plate 4 is newly manufactured and fixed to the sleeve 3, and the flexographic plate-equipped sleeves 3 and 4 are newly manufactured (for example, Patent Document 1, Non-Patent Document). Reference 1 etc.).

According to flexographic printing, a printed material usually has a plurality of printing surfaces 15a to 15d aligned at a constant interval 16a to 16c in the axial direction of the plate cylinder as shown in FIG. It is repeatedly generated with a constant repeat length in any direction.
By the way, one or two or more of these printing surfaces 15a to 15d may coincide between printed materials to be manufactured.

  However, according to the prior art, the flexographic plate 4 is manufactured in units of 3 sleeves, so that even if one or more of the printing surfaces 15a to 15d coincide between the prints to be manufactured, the printing surfaces 15a to 15a. Unless all of 15d match (except when the combination order is different), the sleeves 3 and 4 with flexographic plates are manufactured separately, and the manufacturing costs of the sleeves 3 and 4 with flexographic plates are high, and There was a problem that a large space for storage of the sleeves 3 and 4 with flexographic plates after use had to be secured.

Special table 2013-528513 gazette

Kazuaki Fujii, “Latest Technical Trends of Flexographic Printing Plates”, Journal of Japan Printing Society, 2003, Vol. 40, No. 5, p. 302-p. 311

  Therefore, an object of the present invention is to reduce the manufacturing cost of the sleeve with a flexographic plate and to reduce the storage space of the sleeve with a flexographic plate after use.

  In order to solve the above-described problems, the present invention provides a mandrel having a compressed air pipe provided therein, a cylindrical adapter attached to the outer peripheral surface of the mandrel, and a sleeve attached to the outer peripheral surface of the adapter. A flexo plate fixed to the outer peripheral surface of the sleeve, and the mandrel is supplied with compressed air and the adapter expands in the radial direction so that the sleeve is fixedly fixed to the mandrel. A flexographic printing plate cylinder for flexographic printing, wherein the sleeve comprises a plurality of sleeve parts that are detachably coupled to each other, and the flexographic plate is independently fixed to each sleeve part. This is a machine plate cylinder.

  In the above configuration, preferably, at least one notch portion is provided at one end edge of the sleeve portion, while a projection portion corresponding to the notch portion is provided at the other end edge of the sleeve portion. Extending in the axial direction, the protrusion or notch of one sleeve portion and the corresponding notch or protrusion of the other sleeve portion are orthogonal to the axial direction of the sleeve portion or to the axial direction. The one sleeve portion and the other sleeve portion are coupled to each other by being fitted in a direction, and the flexographic plate has an outer periphery between the notch portion and the protrusion portion in the sleeve portion. Fixed to the surface area.

  In this case, each one of the notch and the protrusion is provided at one end edge and the other end of the sleeve portion, respectively, and both side surfaces of the notch portion and the protrusion extending in the axial direction of the sleeve portion are respectively provided. 1 may be inclined with respect to each other so as not to be parallel along the diametrical direction.

  Alternatively, the two notches are provided at a position facing one diametrical direction at one end edge of the sleeve portion, and in the projection taken in the diametrical direction, the second notch is in the region of the first notch. While the notch is located, the two protrusions are provided at positions opposite to the diameter direction at the other end edge of the sleeve portion, and the first notch and the first protrusion are respectively provided. Both side surfaces extending in the axial direction of the sleeve portion, or both side surfaces extending in the axial direction of the sleeve portion of each of the second notch and the second protrusion, or both, are along the diametrical direction. The first and second protrusions or the first and second cutout portions of the one sleeve portion and the corresponding ones of the other sleeve portions are inclined to each other so as not to be parallel to each other. The one sleeve portion and the other sleeve portion are coupled to each other by fitting the first and second notches or the first and second protrusions in a direction perpendicular to the axial direction. It may be.

Preferably, the plurality of sleeve portions have the same length.
Each of the sleeve portions positioned at both ends of the sleeve further includes an auxiliary sleeve portion having the same diameter as the sleeve portion and having no flexographic plate, and having one end edge of the auxiliary sleeve portion. May be provided with a protrusion or a notch corresponding to the notch or the protrusion of the sleeve part concerned.

  According to the present invention, the sleeve of the plate cylinder of the flexographic printing press is composed of a plurality of sleeve portions that are detachably connected to each other, and the flexographic plate is fixed independently for each sleeve portion. A plurality of printing plates aligned in the axial direction of the cylinder can be handled independently of each other.

  Then, a plurality of flexographic plate-attached sleeve portions respectively corresponding to the printing surface of the printed matter to be manufactured are joined together to form a sleeve necessary for printing, and the sleeve is attached to a mandrel via an adapter, thereby Just set it up.

  At that time, if the used sleeve portion with the flexographic plate is stored, it is sufficient to reuse the sleeve portion with the flexographic plate. If a new printing plate is required, the flexographic printing plate having the printing plate is used. A corresponding sleeve portion may be manufactured, and a sleeve portion with a flexographic plate may be manufactured.

  In this way, when one or two or more printing surfaces produce the same printed matter, the sleeve portion with the flexographic plate can be shared, and thereby the manufacturing cost of the sleeve with the flexographic plate can be suppressed more than before. Moreover, the storage space of the sleeve with a flexographic plate after use can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS It is a side view of the plate cylinder for flexographic printing machines by one Example of this invention, (A) shows the example which comprised the sleeve from several sleeve parts, (B) is each outer side of the sleeve part of both ends. An example in which the auxiliary sleeve portions are combined is shown. FIGS. 2A and 2B are diagrams illustrating a configuration example of both end edges of a sleeve portion of the plate cylinder illustrated in FIG. 1, and FIG. 2A is a side view in the vicinity of one end edge of the sleeve portion, and FIG. FIG. 3C is a plan view of the other end edge of the sleeve portion as viewed in the axial direction, and FIG. 4D is a side view of the vicinity of the other end edge of the sleeve portion. FIG. 3 is a view similar to FIG. 2, showing another configuration example of both end edges of the sleeve portion of the plate cylinder shown in FIG. 1. It is the schematic which shows the structure of the principal part of the conventional various flexographic printing machines. It is a perspective view which shows the structure of an example of the plate cylinder used with the conventional flexographic printing machine. It is a top view which shows an example of the repeating unit of the printing surface by flexographic printing.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1A is a side view of a plate cylinder for a flexographic printing machine according to one embodiment of the present invention. The plate cylinder according to the present invention differs from the conventional plate cylinder shown in FIG. 5 only in the configuration of the sleeve and the flexographic plate. Therefore, in FIG. 1A, the same components as those shown in FIG. 5 are denoted by the same reference numerals, and detailed description thereof will be omitted below.

Referring to FIG. 1A, according to the present invention, the sleeve 3 is composed of a plurality (four in this embodiment) of sleeve portions 3a to 3d removably coupled to each other, and flexographic plates 4a to 4d. Are fixed independently for each of the sleeve portions 3a to 3d.
In this embodiment, the sleeve portions 3a to 3d all have the same length.

Various configurations for connecting the sleeve portions 3a to 3d are conceivable, and some of them will be described below with specific examples.
2A and 2B are diagrams showing one configuration example of both end edges of the sleeve portion shown in FIG. 1, FIG. 2A is a side view in the vicinity of one end edge of the sleeve portion, and FIG. FIG. 4 is a plan view as viewed in the axial direction, (C) is a plan view of the other end edge of the sleeve portion as viewed in the axial direction, and (D) is a side view near the other end edge of the sleeve portion.

  Referring to FIG. 2, one notch 6, 7 is provided at a position facing one diametrical direction at one end edge 5 a of sleeve portion 3 a. Each of the notches 6 and 7 has a rectangular shape extending with a certain width in the circumferential direction of the sleeve portion 3a. In the projection taken in the diameter direction, a second notch is formed in the region of the first notch 6. Part 7 is located.

  Further, rectangular first and second projecting portions 8 and 9 corresponding to the first and second cutout portions 6 and 7 are provided at positions opposite to the diametrical direction at the other end edge 5b of the sleeve portion 3a. The sleeve portion 3a extends in the axial direction.

Furthermore, both side surfaces 6a, 6b; 8a, 8b extending in the axial direction of the respective sleeve portions 3a of the first notch portion 6 and the first projection portion 8 taper inward in the radial direction of the sleeve portion 3a. So that they are inclined to each other.
On the other hand, both side surfaces 7a, 7b; 9a, 9b extending in the axial direction of the respective sleeve portions 3a of the second notch 7 and the second protrusion 9 extend in parallel along the diameter direction.

  In this case, both side surfaces 6a, 6b; 8a, 8b of the first notch 6 and the first protrusion 8 extend in parallel along the diameter direction, while the second notch 7 and the second protrusion 9a and 9b may be inclined with respect to each other so as to taper outward in the radial direction of the sleeve portion 3a, or the first notch 6 and the first protrusion Both side surfaces 6a, 6b; 8a, 8b of the portion 8 are inclined to each other so as to taper inwardly in the radial direction of the sleeve portion 3a, and both side surfaces 7a of the second notch portion 7 and the second projection portion 9 7b; 9a, 9b may be inclined with respect to each other so as to taper outward in the radial direction of the sleeve portion 3a.

In this embodiment, there are two methods for connecting the sleeve portions 3a to 3d.
The first coupling method is a method of coupling the sleeve portions 3a to 3d in a direction orthogonal to the axial direction. According to this method, for example, one sleeve portion 3a and the other sleeve portion 3b are first connected to each other. The first and second projecting portions 8 and 9 of the one sleeve portion 3a are located at the top so that the first projecting portion 8 is at the top, with a space therebetween so that one sleeve portion 3a is at the top. The first and second cutout portions 6 and 7 of the other sleeve portion 3b are arranged in such a manner that the first cutout portion 6 is on the top.

  Next, the one sleeve portion 3a and the other sleeve portion 3b are brought close to each other in the vertical direction (a direction orthogonal to the axial direction of the sleeve portions 3a and 3b), and the second protrusion 9 of the one sleeve portion 3a Passes through the first notch 6 of the other sleeve portion 3b, and then fits into the second notch 7 of the other sleeve portion, and the first protrusion of the one sleeve portion 3a. By fitting the portion 8 into the first cutout portion 6 of the other sleeve portion 3b, the one sleeve portion 3a and the other sleeve portion 3b are coupled to each other.

  At this time, unless the positional relationship between the one sleeve portion 3a and the other sleeve portion 3b changes extremely (for example, the two sleeve portions 3a and 3b are rotated 180 degrees around the axis), the first The state in which the both side surfaces 8a and 8b of the projection 8 are in contact with the both side surfaces 6a and 6b of the first notch portion 6 is maintained, thereby aligning the one sleeve portion 3a and the other sleeve portion 3b. (In particular, alignment in a direction orthogonal to the axial direction) can be performed reliably.

  In the second coupling method, the sleeve portions 3a to 3d are coupled to each other in the axial direction. According to this method, for example, one sleeve portion 3a and the other sleeve portion 3b are first spaced apart from each other in the axial direction. And the first and second protrusions 8 and 9 of the one sleeve portion 3a are aligned so that the first protrusion 8 faces upward, and the first and second protrusions of the other sleeve portion 3b are aligned. The two cutout portions 6 and 7 are arranged in an aligned state so that the first cutout portion 6 faces upward.

  Next, the one sleeve portion 3a and the other sleeve portion 3b are brought closer to each other in the axial direction, and the first protrusion 8 of the one sleeve portion 3a is moved to the first notch portion 6 of the other sleeve portion 3b. And the second projecting portion 9 of the one sleeve portion 3a is fitted into the second notch portion 7 of the other sleeve portion 3b, whereby the one sleeve portion 3a and the other sleeve portion 3b are fitted. The sleeve portions 3b are coupled to each other.

  FIG. 3 is a view similar to FIG. 2, showing another configuration example of both end edges of the sleeve portion of the plate cylinder shown in FIG. 1. Referring to FIG. 3, in this embodiment, one notch 6 ′, 7 ′ is provided at a position facing one diametrical direction at one end edge 5 a ′ of sleeve portion 3 a ′. Each notch 6 ′, 7 ′ is connected to a rectangular outer notch portion extending in the circumferential direction of the sleeve portion 3a with a constant width and to the inside of the outer notch portion, with a constant width parallel to the outer notch portion. In the projection taken in the diametrical direction, the second cutout portion 7 ′ is located in the region of the first cutout portion 6 ′.

  Further, reverse convex protrusions 8 ′ and 9 ′ corresponding to the first and second cutouts 6 ′ and 7 ′ are provided at positions opposite to the diameter direction at the other end 5b ′ of the sleeve portion 3a ′. And extends in the axial direction of the sleeve portion 3a '.

Furthermore, both side surfaces 6a ′, 6c ′; 6b ′, 6d ′ extending in the axial direction of the sleeve portion 3a ′ of the first cutout portion 6 ′, and both side surfaces 8a extending in the axial direction of the first protruding portion 8 ′. ', 8c'; 8b ', 8d' are inclined to each other so as to taper inwardly in the radial direction of the sleeve portion 3a '.
On the other hand, both side surfaces 7a ′, 7c ′; 7b ′, 7d ′ extending in the axial direction of the second cutout portion 7 ′, and both side surfaces 9a ′, 9c ′ extending in the axial direction of the second protruding portion 9 ′. ; 9b 'and 9d' extend in parallel along the diametrical direction.

In the case of this embodiment, the connection between one sleeve portion 3a ′ and the other sleeve portion 3b ′ is the first connection method in the embodiment shown in FIG. 1, ie, each sleeve portion 3a ′, This is done in the same manner as in the embodiment shown in FIG. 2 by a method of joining 3b ′ to each other in a direction orthogonal to the axial direction.
According to this embodiment, the connection between one sleeve portion 3a ′ and the other sleeve portion 3b ′ can be performed in a state of being reliably aligned in the axial direction and the direction orthogonal to the axial direction.

FIG. 1B is a side view showing a modification of the embodiment shown in FIG. Referring to FIG. 1B, in this modification, a flexographic plate having the same diameter as that of sleeve portions 3a and 3d is further provided on the outer edge of each of sleeve portions 3a and 3d located at both ends of sleeve 3. The auxiliary sleeve part 3e which does not have is provided.
One end edge of the auxiliary sleeve portion 3e is provided with a protrusion or notch corresponding to the notch or protrusion of the related sleeve portions 3a and 3d.

  Thus, according to the present invention, a plurality of flexographic sleeve portions respectively corresponding to the printing surface of the printed matter to be manufactured are joined together to form a sleeve necessary for printing, and is attached to the mandrel via the adapter. Thus, the setting of the plate cylinder is performed.

  At that time, if the used sleeve portion with the flexographic plate is stored, it is sufficient to reuse the sleeve portion with the flexographic plate. If a new printing plate is required, the flexographic printing plate having the printing plate is used. Corresponding sleeve portions are manufactured, and flexographic sleeve portions are manufactured.

  As a result, when one or two or more printing surfaces produce the same printed matter, it is possible to share the sleeve portion with the flexographic plate, thereby reducing the production cost of the sleeve with the flexographic plate than before, Storage space for the sleeve with flexographic plate after use is also reduced.

  As mentioned above, although the structure of this invention was demonstrated based on some preferable Example, the structure of this invention is not limited to these Examples, The structure of the structure described in the attached utility model registration claim It goes without saying that various modifications can be made within the scope.

For example, in the above embodiment, a pair of notches are provided on one side edge of the sleeve portion, and a corresponding pair of protrusions are provided on the other side edge of the sleeve portion. One notch is provided, and a protrusion corresponding to the notch may be provided on the other side edge of the sleeve portion.
Further, if the sleeve portions are coupled to each other only in the axial direction, the projection taken in the diameter direction of one of the first and second cutout portions (and the corresponding first and second protrusions) is taken into consideration. There is no need.

DESCRIPTION OF SYMBOLS 1 Mandrel 2 Adapter 3 Sleeve 3a-3d, 3a'-3d 'Sleeve part 3e Auxiliary sleeve part 4 Flexo plate 4a-4d Flexo plate 5a, 5a' One end edge 5b, 5b 'Other end edge 6, 6' 1st notch Portions 6a, 6b, 6a 'to 6d' Side surfaces 7 and 7 'extending in the axial direction of the sleeve portion Second cutout portions 7a, 7b and 7a' to 7d 'Side surfaces 8 and 8' extending in the axial direction of the sleeve portion Protrusions 8a, 8b, 8a 'to 8d' Side surfaces 9 and 9 'extending in the axial direction of the sleeve portion Second projections 9a, 9b and 9a' to 9d 'Side surfaces 10 extending in the axial direction of the sleeve portion Ink supply portion 11 Anilox roll 12 Plate cylinder 13 Impression cylinder 14 Common impression cylinder 15a-15d Printing surface 16a-16c Space | interval

Claims (6)

A mandrel with an internal compressed air line;
A cylindrical adapter attached to the outer peripheral surface of the mandrel;
A sleeve attached to the outer peripheral surface of the adapter;
A flexo plate fixed to the outer peripheral surface of the sleeve, and the mandrel is supplied with compressed air and the adapter expands in the radial direction so that the sleeve is closely fixed to the mandrel. A plate cylinder for a flexographic printing machine,
The sleeve comprises a plurality of sleeve portions that are detachably coupled to each other, and the flexographic plate is fixed to each sleeve portion independently.   One end edge of the sleeve portion is provided with at least one notch portion, while the other end edge of the sleeve portion is provided with a protrusion corresponding to the notch portion, and extends in the axial direction of the sleeve portion. By fitting the projecting portion or the notch portion of the sleeve portion and the corresponding notch portion or the projecting portion of the other sleeve portion in the axial direction of the sleeve portion or a direction perpendicular to the axial direction. The one sleeve portion and the other sleeve portion are coupled to each other, and the flexographic plate is fixed to an outer peripheral surface region between the notch portion and the protrusion portion in the sleeve portion. The plate cylinder for a flexographic printing press according to claim 1.   Each one of the notch and the protrusion is provided at one end edge and the other end edge of the sleeve portion, respectively, and both side surfaces extending in the axial direction of the sleeve portion of the notch portion and the protrusion portion are one. The plate cylinder for a flexographic printing press according to claim 2, wherein the plate cylinders are inclined with respect to each other so as not to be parallel along the diametrical direction.   The two notches are provided at a position facing one diametrical direction at one end edge of the sleeve portion, and in the projection taken in the diametrical direction, the second notch is in the region of the first notch. The two projecting portions are provided at the diametrically opposed positions at the other end edge of the sleeve portion, and the sleeves of the first notch portion and the first projecting portion are respectively provided. Both side surfaces extending in the axial direction of the portion, or both side surfaces extending in the axial direction of the sleeve portions of the second notch and the second protrusion, or both, are parallel to the diametrical direction. The first and second protrusions or the first and second notches of the one sleeve portion and the corresponding first and second sleeve portions corresponding to each other. The one sleeve portion and the other sleeve portion are coupled to each other by fitting two notches or the first and second protrusions in a direction perpendicular to the axial direction. The plate cylinder for a flexographic printing machine according to claim 2.   The plate cylinder for a flexographic printing machine according to any one of claims 1 to 4, wherein each of the plurality of sleeve portions has an equal length.   An auxiliary sleeve portion having the same diameter as the sleeve portion and not having the flexographic plate is further provided at each outer edge of the sleeve portion located at both ends of the sleeve, and one end edge of the auxiliary sleeve portion is provided at one end edge of the auxiliary sleeve portion. 6. A plate for a flexographic printing machine according to claim 1, wherein a projection or a notch corresponding to the notch or the projection of the sleeve part concerned is provided. Torso.

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