JP2004237682A - Manufacturing equipment of lithographic printing plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To precisely add an identification mark to a site of a web corresponding to a quality boundary portion. <P>SOLUTION: A process computer 78 sets a quality boundary portion for an aluminum web 12 by using a delivery position to a transfer route of a delivery device 16, when the quality of a lithographic printing plate is to be changed, Consequently, a tracking device 82 tracks the quality boundary portion in the aluminum web along the transport route. The process computer 78 sets conditions for a target surface treatment in a web processor in accordance with the quality of the lithographic printing plate at the time when the quality boundary portion of the aluminum web 12 reaches the web processor such as an electrolytic processor or the like on the basis of a tracking signal from the tracking device 82, operates a labeler 74 at the time when the quality boundary portion reaches a labeling position and sticks an identification label to the quality boundary portion of a product web 28 by the labeler 74. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lithographic printing plate for producing a lithographic printing plate by carrying out various treatments on the web while conveying a long strip-shaped web serving as a support for the lithographic printing plate along a predetermined conveyance path. The present invention relates to a manufacturing apparatus.
[0002]
[Prior art]
In a planographic printing plate manufacturing apparatus (hereinafter, simply referred to as “manufacturing apparatus”) using an aluminum web as a support, the aluminum web is transported along a predetermined transport path by a web transport device including, for example, a pass roll and a bridle roll. However, after this aluminum web is surface-treated by a plurality of surface treatment apparatuses, a photosensitive layer is formed on the aluminum web, thereby producing a product web which is a processing material for a lithographic printing plate. This product web is supplied to a processing line of a lithographic printing plate, cut into a predetermined product size in the processing line, and processed into a lithographic printing plate as a product.
[0003]
By the way, in the manufacturing apparatus as described above, when changing the type of the lithographic printing plate using the aluminum web as a support, the surface treatment conditions for the aluminum web are usually determined by the surface treatment apparatus and the formation conditions of the photosensitive layer by the coating apparatus. Will be changed at the boundary of the aluminum web. For example, this type boundary is set by an operator attaching a linear identification mark to the aluminum web by marking, coating or the like on the upstream side of the surface treatment apparatus. Further, in the manufacturing apparatus, the operator visually tracks the identification mark on the aluminum web, and at the timing when the identification mark reaches the web processing apparatus such as the surface processing apparatus or the coating apparatus, the surface processing conditions in the web processing apparatus and the formation of the photosensitive layer are performed. Each condition is changed.
[0004]
On the other hand, in the processing line for lithographic printing plates, the operator confirms the position of the product boundary on the product web by using the identification mark while referring to the manufacturing information in the manufacturing apparatus, and the product web is spread over a predetermined length using this identification mark as a reference. By scrapping, it is possible to prevent a part processed by the web processing apparatus from being mixed in the product during the transition of the production condition from one kind to another kind in the product web.
[0005]
[Problems to be solved by the invention]
However, in recent years, as a result of improving the production efficiency of lithographic printing plates by a production apparatus, the conveyance speed of aluminum webs tends to increase, and it becomes difficult for an operator to accurately track the identification marks on the aluminum webs visually. I came. For this reason, in the manufacturing apparatus, it is visually confirmed that the identification marks on the aluminum web have reached each of the plurality of web processing apparatuses, and if the manufacturing conditions are changed, manufacturing based on the identification marks in the plurality of web processing apparatuses is performed. Variations in the condition change timing occur, and as a result, the position of the identification mark attached to the aluminum web does not sufficiently coincide with the position of the substantial product boundary.
[0006]
An object of the present invention is to provide an apparatus for producing a lithographic printing plate that can attach an identification mark to a portion corresponding to a product boundary in a web with high accuracy in consideration of the above facts.
[0007]
[Means for Solving the Problems]
In the lithographic printing plate manufacturing apparatus according to the present invention, the tracking means tracks the type boundary portion of the lithographic printing plate on the web sent out by the web delivery device along the transport path, and based on the information from this tracking means, The line control means sets the target manufacturing conditions in the web processing device in synchronization with the passage timing of the web processing device at the product type boundary portion, so that the target manufacturing conditions in a plurality of web processing devices are always set to the product type boundary portion. Since it can be newly set (reset) at a fixed timing, the changed part of the manufacturing condition in which the target manufacturing condition on the web is actually changed can be accurately matched with the product type boundary part.
[0008]
Further, in the planographic printing plate manufacturing apparatus according to the present invention, the line control means operates the marking apparatus so that the identification mark is attached to the part corresponding to the product type boundary portion on the web based on the information from the tracking means. The identification mark can be accurately given to the part corresponding to the substantial product boundary where the production conditions on the web are changed. Here, the part corresponding to the substantial variety boundary part on the web is, for example, the part where the resetting of the manufacturing conditions on the web is started or the part where the resetting of the manufacturing conditions on the web is completed. Even if both the part where the resetting of manufacturing conditions has been started and the part where the resetting of manufacturing conditions has been completed, continuous from the part where the resetting of manufacturing conditions on the web has started to the part where resetting has been completed A part may be sufficient.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a planographic printing plate manufacturing apparatus according to an embodiment of the present invention will be described with reference to the drawings.
[0010]
(Configuration of the embodiment)
FIG. 1 shows a planographic printing plate manufacturing apparatus according to an embodiment of the present invention. The manufacturing apparatus 10 manufactures a lithographic printing plate using the aluminum web 12 as a support while transporting the aluminum web 12 downstream along a predetermined transport path.
[0011]
The production apparatus 10 is provided with a delivery device 16 loaded with an aluminum coil 14 in which an aluminum web 12 is wound in a roll shape at the upstream end, and this delivery device 16 is used during the production of a lithographic printing plate. The aluminum web 12 is continuously sent out from the aluminum coil 14 to the downstream side. The sending device 16 counts the length of the aluminum web 12 sent from the aluminum coil 14 to the conveyance path, and feeds a signal S corresponding to the length. _FE Is provided. In the manufacturing apparatus 10, a plurality of pass rolls 18 and bridles 20, 22, 24, and 26 are arranged along the conveyance path of the aluminum web 12, and a processing material for a planographic printing plate is provided at the end of the conveyance path. A winding device 30 for winding the product web 28 into a roll is installed.
[0012]
The aluminum web 12 is transported at a predetermined line speed while being guided by the pass roll 18 and receiving a transport force from the main drive rolls 21, 23, 25, 27, etc. constituting the bridles 20, 22, 24, 26. Here, the bridles 20, 22, 24, and 26 are constituted by a plurality of rolls including main drive rolls 21, 23, 25, and 27, respectively. Accordingly, the tension of the aluminum web 12 is adjusted. A pulse generator 32 is connected to the main drive roll 27 in the bridle 26, and the pulse generator 32 outputs a number of pulse signals proportional to the rotation amount of the main drive roll 27, that is, the conveyance amount of the aluminum web 12.
[0013]
In the manufacturing apparatus 10, a joining device 34 and a first reserve device 36 are sequentially arranged on the downstream side of the delivery device 16 along the conveyance direction (arrow F direction) of the aluminum web 12. After all the aluminum webs 12 (old webs) have been sent out from one aluminum coil 14 loaded in the delivery device 16, the joining device 34 is fed from one aluminum coil 14 loaded in the delivery device 16 next. The front end of the aluminum web 12 (new web) to be fed is joined to the rear end of the old web. Here, the joining device 34 performs joining by, for example, ultrasonic joining that welds the aluminum webs 12 by applying ultrasonic waves while pressing the old web rear end and the new web leading end together.
[0014]
In addition, the first reserve device 36 stores the aluminum web 12 in a bellows-like curved state, and when the aluminum web 12 is joined by the joining device 34, the first reserve device 36 sends out the aluminum web 12 stored therein and sends it out. Instead of 16, the aluminum web 12 is supplied to the downstream side of the conveying path. Thus, even when the feeding of the aluminum web 12 from the feeding device 16 is temporarily interrupted when the aluminum web 12 is joined, the supply of the aluminum web 12 is continued to the downstream side of the first reserve device 36. The first reserve device 36 is provided with a storage counter 37 for counting the length of the aluminum web 12 stored therein, and this storage counter 37 is the length (storage length) of the stored aluminum web 12. Count signal S corresponding to _C1 Is output to the tracking device 82 described later.
[0015]
When the joining of the old web and the new web is completed, the joining device 34 releases the joint between these aluminum webs 12 from the joining position. In synchronization with this, the sending device 16 resumes sending out the new web. At this time, the delivery device 16 sends out the aluminum web 12 at a speed higher than the line speed for a predetermined time, and after returning the storage amount of the aluminum web 12 in the first reserve device 36 to the amount before the start of joining, The feeding speed of the aluminum web 12 is reduced so as to match the line speed.
[0016]
In the manufacturing apparatus 10, a degreasing treatment tank 126, a grained treatment tank 128, a first water washing treatment tank 130, an etching treatment tank 132, and a first treatment apparatus are provided on the downstream side of the first reserve device 36 as surface treatment devices for the aluminum web 12. Two water-washing treatment tanks 134 are arranged in order along the transport direction. Here, the degreasing treatment tank 126, the grained treatment tank 128, and the etching treatment tank 132 each store a treatment liquid corresponding to the type of surface treatment, and are stored in these treatment tanks 126, 128, and 132. The surface treatment of the aluminum web 12 is performed by sequentially immersing or spraying a part of the aluminum web 12 along the longitudinal direction in the treatment liquid. Moreover, in the 1st water-washing processing tank 130 and the 2nd water-washing processing tank 134, the process liquid adhering to the aluminum web 12 is wash | cleaned and removed by spraying cleaning water on the aluminum web 12 by spray etc., for example. In addition, in the manufacturing apparatus 10, in addition to these processing tanks 126-134 or in place of any of these processing tanks 126-134, a desmut processing tank, a mechanical rough surface, depending on the type of the lithographic printing plate, etc. In some cases, the chemical treatment apparatus or the like is arranged, or the arrangement of each surface treatment apparatus is switched.
[0017]
In the manufacturing apparatus 10, an electrolytic treatment apparatus 136 is disposed on the downstream side of the second water washing treatment tank 134. The electrolytic processing apparatus 136 includes an electrolytic processing tank 137 that stores an electrolytic solution L mainly composed of an acidic solution such as sulfuric acid. The inside of the electrolytic treatment tank 137 is partitioned into a power feeding unit 138 and an electrolysis unit 140 along the conveyance path of the aluminum web 12, and the upstream power feeding unit 138 is immersed in the electrolytic solution L. A feeding electrode 142 is disposed so as to face the aluminum web 12, and an electrolytic electrode 144 is also disposed in the electrolytic unit 140 on the downstream side so as to be immersed in the electrolytic solution L and to face the aluminum web 12. . The electrolytic processing apparatus 136 includes a DC power source 146 for supplying an electrolytic current. The positive electrode of the DC power source 146 is connected to the power supply electrode 142 via a high voltage cable, a bus bar, and the like. The negative electrode of the DC power source 146 is It is connected to the electrolytic electrode 144 via a high voltage cable, a bus bar or the like.
[0018]
The aluminum web 12 that has been transported to the electrolytic processing apparatus 136 is partly along the longitudinal direction, and is stored in the power feeding unit 138 and the electrolytic unit 140 by a pass roll (not shown) in the electrolytic processing tank 137, respectively. It is guided so that it may be sequentially immersed in L. At this time, the DC power supply 146 is turned on and applies an electrolytic voltage controlled to a predetermined voltage value to the electrodes 42 and 44. As a result, the electrolytic current supplied from the DC power source 146 flows through a circuit from the feeding electrode 142 to the electrolytic solution L of the feeding unit 138 to the aluminum web 12 to the electrolytic solution L of the electrolytic unit 140 to the electrolytic electrode 144. At this time, in the electrolysis unit 140, an electrolytic reaction occurs between the electrolytic electrode 144 serving as a cathode and the aluminum web 12 serving as an anode, and an anodic oxide film is generated on the surface of the aluminum web 12. The amount (thickness) per unit area of the anodized film varies depending on the type of lithographic printing plate. Therefore, the DC power supply 146 is controlled by a power supply control unit (not shown) so that the current value of the electrolytic current becomes a preset current value according to the size of the aluminum web 12, the type of the lithographic printing plate, and the like. The
[0019]
In the manufacturing apparatus 10, the 3rd water-washing processing tank 148 and the dry casing 150 are arrange | positioned in order along the conveyance direction in the downstream of the electrolytic treatment apparatus 136. FIG. The third water washing treatment tank 148 sprays washing water onto the aluminum web 12 on which the anodized film is formed by spraying or the like, and removes the electrolytic solution L adhering to the aluminum web 12 by washing. Further, in the drying casing 150, the aluminum web 12 conveyed from the third washing treatment tank 148 is dried with hot air.
[0020]
In the manufacturing apparatus 10, an earth roll device 52 is installed on the downstream side of the drying casing 150. The earth roll device 52 is provided with a first earth roll 54 and a second earth roll 56, the first earth roll 54 contacts the back surface of the aluminum web 12, and the second earth roll 56 contacts the surface of the aluminum web 12. It is arranged to touch. The aluminum web 12 is stretched between the earth rolls 54 and 56 so as to come into contact with the roll surfaces of the earth rolls 54 and 56 in a pressurized state. Conductive brushes (not shown) made of a conductive material are slidably pressed against the shaft portions of the earth rolls 54 and 56, and these conductive brushes are electrically connected to the frame ground in the manufacturing apparatus 10 by cables. Connected. As a result, the aluminum web 12 is grounded to the frame ground through the earth rolls 54 and 56 and the potential of the aluminum web 12 on the downstream side of the earth roll device 52 is maintained at a substantially ground potential. Occurrence is prevented.
[0021]
In the manufacturing apparatus 10, a first coating device 64, a drying device 66, a second coating device 68, and a drying device 70 are sequentially arranged on the downstream side of the earth roll device 52 along the transport direction. The first coating device 64 applies a photosensitive coating solution to the surface of the aluminum web 12, and the aluminum web 12 coated with the photosensitive coating solution is conveyed into the first drying device 66 and dried by hot air drying. As a result, a photosensitive layer is formed on the aluminum web 12. In addition, the second coating device 68 and the second drying device 70, for example, apply PVA (polyvinyl alcohol) or the like on the photosensitive layer as necessary, dry with hot air, and laminate an overcoat layer on the photosensitive layer.
[0022]
In the manufacturing apparatus 10, a second reserve device 72, a Laval sticking device 74, and a winding device 30 are sequentially installed on the downstream side of the second drying device 70. Here, the winding device 30 winds the product web 28 having a photosensitive layer formed on the aluminum web 12 fed from the second reserve device 72 in a roll shape around the outer periphery of a winding shaft (not shown). Product coil 76. In the winding device 30, when the product web 28 having a predetermined length is wound as the product coil 76, the product web 28 is cut between the Laval sticking device 74 and the product coil 76, and then the product coil 76 is removed from the winding shaft. Then, the winding of the product web 28 is resumed starting from the cut end. At this time, the second reserve device 72 stores the product web 28 while curving it in a bellows shape, and the product web 28 is taken up by the take-up device 30 to feed the product web 28 to the take-up device 30 side. Suspend temporarily until it can be resumed.
[0023]
The Laval sticking device 74 sticks a flaky identification label (see FIG. 2) to the side end of the product web 28 in synchronization with an operation signal input from a process computer 78 described later. Similarly to the first reserve device 36, the second reserve device 72 is provided with a storage counter 73 that counts the length of the product web 28 stored therein, and the storage counter 73 includes an aluminum web to be stored. Count signal S corresponding to 12 lengths (storage length) _C2 Is output to the tracking device 82.
[0024]
The product coil 76 removed from the winding device 30 is conveyed to a processing line (not shown) of the planographic printing plate, and in this processing line, the cutting of the product web 28 fed from the product coil 76 to the line, Pasting and the like are performed and processed into a lithographic printing plate.
[0025]
As shown in FIG. 1, the manufacturing apparatus 10 is provided with a process computer 78, a conveyance control unit 80, and a tracking device 82. Here, the conveyance control unit 80 includes a pulse signal S from the pulse generator 32 connected to the main drive roll 27 in the bridle 26. _PL Enter. This pulse signal S _PL Based on the above, the conveyance control unit 80 adjusts the conveyance speed of the webs 12 and 28 by the main drive roll 27 to a preset reference conveyance speed by feedback control of the rotation speed of the main drive roll 27. The reference transport speed is determined according to the type of lithographic printing plate to be manufactured, and is set in the internal memory (not shown) of the transport control unit 80 by the process computer 78. The conveyance control unit 80 controls the rotational speeds of the other main drive rolls 21, 23, 25 and the pass roll 18 based on the pulse signal from the pulse generator 32, and the delivery speed of the aluminum web 12 by the delivery device 16. And the winding speed of the product web 28 by the winding device 30 is controlled.
[0026]
The tracking device 82 receives a pulse signal S from the pulse generator 32 as the position of the specific portion of the aluminum web 12 delivered by the delivery device 16 in the transport path. _PL In addition, the specific portion of the aluminum web 12 is tracked along the transport path by correcting the position of the specific portion in the transport path based on the count signals SC1 and SC2 from the two reserve devices 36 and 72. The tracking signal S corresponding to the position of a specific portion on the aluminum web 12 _TR Is output to the process computer 78. Here, the specific part of the aluminum web 12 is, for example, a kind boundary part 90 (see FIG. 2A), which is a boundary part between a kind of lithographic printing plate on the aluminum web 12 and another kind, and the joining device 34. The quality of the web joint 92 (see FIG. 2B) in which the tip of the aluminum web 12 (new web) is joined to the rear end of the aluminum web 12 (old web) and the quality of the aluminum web 12 (product web 28). An abnormal portion 94 (see FIG. 2C) and the like, and these specific portions are determined based on determination conditions preset in the process computer 78.
[0027]
The process computer 78 is supplied with a production schedule including information on the type of lithographic printing plate to be produced and its production amount from the host computer, and based on this production schedule, the process computer 78 provides the production apparatus 10 with the production computer 10. The whole is controlled. Specifically, the surface treatment conditions (target surface treatment conditions) of the aluminum web 12 by the degreasing treatment tank 126, the graining treatment tank 128, the etching treatment tank 132, the electrolytic treatment apparatus 136, etc. are lithographic printing plates. And the photosensitive layer deposition conditions (target deposition conditions) on the aluminum web 12 by the first coating device 64, the first drying device 66, the second coating device 68, the second drying device 70, and the like. Is set according to the type of lithographic printing plate. Here, the target processing conditions include the electrolytic current in the electrolytic processing apparatus 136, the liquid temperature of the electrolytic solution L, and the like, and the target film forming conditions include the photosensitive coating liquid applied by the first coating apparatus 64. The type, the coating amount, the temperature of the hot air supplied into the first drying device 66, the air volume, and the like are included.
[0028]
(Operation of the embodiment)
Next, the operation and action of the manufacturing apparatus 10 configured as described above will be described. In the manufacturing apparatus 10, the feed signal S from the delivery counter 17 is produced when the planographic printing plate is manufactured. _FE Based on the above, the process computer 78 determines the delivery length of the aluminum web 12 from the delivery device 16. If the delivery length of the aluminum web 12 matches the target production length of a certain type of lithographic printing plate, the process computer 78 performs processing for changing the lithographic printing plate to be manufactured from one type to another type. . At this time, when the delivery length of the aluminum web 12 coincides with the target production length of a certain type of lithographic printing plate, the process computer 78 uses the delivery position of the delivery device 16 to the transport path as a reference to the aluminum web 12. The tip 90A of the product boundary 90 is set. Thereby, the tracking device 82 tracks the tip 90A of the product boundary 90 in the aluminum web along the conveyance path, and the tracking signal S corresponding to the position of the tip 90A of the product boundary 90 is obtained. _TR Is output to the process computer 78.
[0029]
The process computer 78 receives the tracking signal S from the tracking device 82. _TR Based on the above, at the timing when the tip 90A of the type boundary section 90 reaches various surface processing apparatuses, the target surface processing conditions in these surface processing apparatuses are set according to the type of the planographic printing plate to be newly manufactured. The target film forming conditions in various coating film forming apparatuses are set according to the type of lithographic printing plate to be newly produced. Thereby, the surface treatment apparatus such as the degreasing treatment tank 126, the graining treatment tank 128, the etching treatment tank 132, the electrolytic treatment apparatus 136 starts changing the surface treatment conditions for the aluminum web 12, and after the change is completed, the aluminum web 12 The surface processing is performed on the upstream side of the product type boundary portion 90 in accordance with the target surface processing conditions newly set by the process computer 78. The coating film forming apparatuses such as the first coating apparatus 64, the first drying apparatus 66, the second coating apparatus 68, and the second drying apparatus 70 also start changing the film forming conditions for the aluminum web 12, and after the change is completed, the aluminum web 12, a coating film such as a photosensitive layer is formed according to the target film forming conditions newly set by the process computer 78 on the upstream side of the product boundary 90.
[0030]
Here, in the surface treatment apparatus, it takes a certain time from the start of changing the surface treatment conditions for the aluminum web 12 to the completion of the change to the target surface treatment conditions. It takes a certain time from the start of changing the film condition to the completion of the change to the target film forming condition. The process computer 78 constantly monitors the surface treatment conditions in the surface treatment apparatus and the film formation conditions in the coating film formation apparatus, and the longest of the condition change times in these surface treatment apparatuses and film formation apparatuses is used as a reference. The rear end 90 </ b> B of the product boundary 90 is set with respect to the aluminum web 12.
[0031]
By performing the above-described processing by the process computer 78, the manufacturing apparatus 10 performs surface processing on the upstream portion of the product boundary 90 in the aluminum web 12 in accordance with the target surface processing conditions newly set by the process computer 78. To do. The coating film forming apparatuses such as the first coating apparatus 64, the first drying apparatus 66, the second coating apparatus 68, and the second drying apparatus 70 also start changing the film forming conditions for the aluminum web 12, and after the change is completed, the aluminum web 12, a coating film such as a photosensitive layer is formed according to the target film forming conditions newly set by the process computer 78 on the upstream side of the product boundary 90. As a result, in the manufacturing apparatus 10, various surface treatment apparatuses are used at a timing that coincides with the timing at which the product boundary 90 in the aluminum web 12 reaches the various surface treatment apparatuses and coating film forming apparatuses arranged along the conveyance path. Since the target surface treatment condition and the target film formation condition in the coating film forming apparatus can be respectively set, the changed part of the production condition in which the target surface treatment condition and the target film formation condition in the aluminum web 12 are actually changed is referred to as the product boundary part 90. Can be matched with high accuracy.
[0032]
Next, the process computer 78 detects the tracking signal S from the tracking device 82. _TR Based on the above, an operation signal is output to the Laval sticking device 74 at the timing when the leading end 90A and the rear end 90B at the product boundary 90 reach the label sticking position of the Laval sticking device 74, respectively. Thereby, the Laval sticking apparatus 74 sticks the identification label 96 correctly on the front-end | tip 90A and the rear-end 90B in the kind boundary part 90, as FIG. 2 (A) shows. These identification labels 96 are provided on the side end of the product web 28 so that a part of the identification label 96 extends from the side end of the product web so that the operator can visually recognize the product web 28 as a product coil 76. It is pasted.
[0033]
In the manufacturing apparatus 10, when a certain type of lithographic printing plate is manufactured, the aluminum web 12 (next fed out by the feeding device 16 to the rear end portion of the aluminum web 12 (old web) fed from the feeding device 16 to the conveying path ( By joining the leading end of the new web with the joining device 34, the chance of line stoppage is reduced as much as possible. At this time, when receiving a joining signal from the joining device 34, the process computer 78 determines that the web joining portion 92 has been formed at the joining position in the joining device 34. On the other hand, when the tracking device 82 receives a joining signal from the joining device 34, the tracking device 82 starts tracking the web joining portion 92 along the conveyance path from the joining position in the joining device 34, and corresponds to the position of the web joining portion 92. Tracking signal S _TR Is output to the process computer 78.
[0034]
The process computer 78 receives the tracking signal S from the tracking device 82. _TR The predetermined cut-off length L with respect to the web joint 92 based on _UC Only upstream part and cutoff length L _LC The operation signal is output to the Laval sticking device 74 at the timing when the downstream portion reaches the label sticking position of the Laval sticking device 74. Thereby, as shown in FIG. 2B, the laval sticking device 74 has a cut-off length L with respect to the web joining portion 92 in the product web 28. _UC Only upstream part and cutoff length L _LC Only the identification label 96 is affixed precisely to the downstream part. Here, the cutoff length L _UC And truncation length L _LC Each can be set to an arbitrary length.
[0035]
Further, in the manufacturing apparatus 10, there is a case where a process of changing from one type of lithographic printing plate to another type is performed with the web joining portion 92 as a boundary. In this case, the process computer 78 performs a process on the web joining portion 92. The predetermined cut-off length L _UC Only the upstream side portion is regarded as the tip 90A of the product boundary 90, and the rear end 90B of the product boundary 90 is used as the aluminum web 12 with reference to the longest condition change time in the surface treatment apparatus and the film forming apparatus. Set for Also in this case, the process computer 78 determines the timing at which the part regarded as the front end 90A of the product boundary 90 and the rear end 90B reach the Laval sticking device 74, as in the case where the web joining portion 92 is not formed on the aluminum web 12. Then, an operation signal is output to the Laval sticking device 74, and the identification label 96 is stuck on the part regarded as the front end 90A of the product boundary 90 and the rear end 90B.
[0036]
In the manufacturing apparatus 10, the surface treatment conditions in the surface treatment apparatus such as the degreasing treatment tank 126, the graining treatment tank 128, the etching treatment tank 132, the electrolytic treatment apparatus 136, the first coating apparatus 64, and the first application are processed by the process computer 78. The film forming conditions in the coating film forming apparatus such as the drying apparatus 66, the second coating apparatus 68, and the second drying apparatus 70 are constantly monitored. When the lithographic printing plate is manufactured, the process computer 78 is used when the surface treatment condition in any of the various surface treatment apparatuses deviates from the target surface treatment condition for some reason, and the film formation in any of the various coating film forming apparatuses. Processing to distinguish parts manufactured under conditions that deviate from the target surface processing conditions and target film forming conditions from other parts when the conditions deviate from the target film forming conditions for some reason (quality abnormality processing) I do.
[0037]
At the time of the quality abnormality treatment, the process computer 78 determines that the surface treatment condition in any one of the surface treatment apparatuses such as the degreasing treatment tank 126, the graining treatment tank 128, the etching treatment tank 132, the electrolytic treatment apparatus 136 is the target surface treatment condition. At the time of removal, the tip of the treated portion of the aluminum web 12 that has been surface treated by the surface treatment device is set as the tip 94A of the quality abnormal portion 94, and the first coating device 64, the first drying device 66, the first 2 When the film forming conditions in the coating film forming apparatus such as the coating apparatus 68 and the second drying apparatus 70 deviate from the target film forming conditions, the aluminum web 12 on which a coating film such as a photosensitive layer is formed by the surface treatment apparatus. The tip of the coating film portion is set as the tip 94A of the quality abnormality portion 94.
[0038]
In addition, the process computer 78 is configured to execute the abnormal condition processing when the surface treatment conditions in the surface treatment apparatus are restored to the target surface treatment conditions by adjustment, repair restoration processing, or the like, and when the film formation conditions in the coating film formation apparatus are the target. When the film forming conditions are restored, when the surface treatment conditions return to the target surface treatment conditions and the target film formation conditions, the rear end of the treated portion of the aluminum web 12 surface-treated by the surface treatment apparatus is abnormal in quality. Set as the rear end 94B of the portion 94, and when the film forming condition returns to the target film forming condition, the coating film portion of the aluminum web 12 on which a coating film such as a photosensitive layer is formed by the coating film forming apparatus. The rear end is set as the rear end 94B of the quality abnormality portion 94. On the other hand, the tracking device 82 tracks the leading end 94A and the trailing end 94B of the quality abnormality portion 94 set by the process computer 78 along the conveyance path, and tracking corresponding to the positions of the leading end 94A and the trailing end 94B, respectively. Signal S _TR Is output to the process computer 78.
[0039]
The process computer 78 also receives a tracking signal S from the tracking device 82. _TR Based on the above, an operation signal is output to the Laval sticking device 74 at the timing when the leading end 94A and the rear end 94B in the quality abnormality portion 94 reach the label sticking position of the Laval sticking device 74, respectively. Thereby, the Laval sticking apparatus 74 sticks the identification label 96 correctly on each of the front end 94A and the rear end 94B in the quality abnormality portion 94, as shown in FIG.
[0040]
The product web 28 manufactured by the manufacturing apparatus 10 as described above is supplied as a product coil 76 to the processing line of the lithographic printing plate. In the processing line, during the processing of the lithographic printing plate, the product boundary portion 90, the predetermined range around the web joining portion 92, and the quality abnormal portion 94 in the product web 28 are cut off as product waste. At this time, in the processing line, referring to the manufacturing information from the process computer 78 in the manufacturing apparatus 10, the product boundary part 90, the predetermined range around the web joint part 92, and the quality abnormality part 94 are cut off using the identification label 96 as a mark. . As a result, in the processing line, only the product boundary portion 90, the predetermined range around the web joint portion 92, and the quality abnormal portion 94 in the product web 28 can be surely scrapped, so these portions are mixed in the lithographic printing plate as a product. This prevents the product web 28 from being scrapped more than necessary in view of safety, so that the yield from the product web 28 to the planographic printing plate is also improved.
[0041]
In addition to the planographic printing plate manufacturing apparatus, the configuration according to the present invention is a planographic plate if it is a manufacturing apparatus in which various surface treatments or coating film formation is continuously performed on a long belt-like support. In addition to printing plate manufacturing equipment, various manufacturing equipment for resin film such as photographic film, iron making lines that continuously cast and roll metal, and paper making lines that perform various surface treatments on paper It can also be applied to devices.
[0042]
【The invention's effect】
As described above, according to the planographic printing plate manufacturing apparatus of the present invention, the identification mark can be attached to the portion corresponding to the product type boundary portion on the web with high accuracy.
[Brief description of the drawings]
FIG. 1 is a schematic side view showing a configuration of a planographic printing plate manufacturing apparatus according to an embodiment of the present invention.
FIG. 2 is a plan view showing product type boundaries, web joints, and quality abnormalities in a product web to which an identification label is attached in the manufacturing apparatus according to the embodiment of the present invention.
[Explanation of symbols]
10. Manufacturing equipment (lithographic printing plate manufacturing equipment)
12 Aluminum web (web)
16 Sending device (web sending device)
18 pass roll (web transport means)
26 Bridle (web transport means)
28 Product Web (Web)
64 First coating device (web processing device)
66 First drying device (web processing device)
68 Second coating device (web processing device)
70 Second drying device (web processing device)
74 Laval sticking device (marking device)
78 Process computer (line control means)
80 Transport control unit (web transport means)
82 Tracking device (tracking means)
90 Variety border
92 Web joint
94 Quality abnormal part
96 Identification label (identification mark)

Claims (3)

A web delivery device for delivering a long belt-like web serving as a support for a lithographic printing plate to the downstream side;
Web transport means for transporting the web sent out by the web delivery device along a predetermined transport path;
A plurality of web processing apparatuses which are provided along the transport path and which surface-treats the web transported by the web transport means in accordance with target production conditions corresponding to the type of lithographic printing plate, or forms a film on the web; ,
A marking device that is provided on the downstream side of the web processing device along the transport path and attaches an identification mark for displaying a specific portion on the web transported by the web transport means;
Tracking means for tracking the type boundary portion of the lithographic printing plate on the web delivered by the web delivery device along the transport path;
Based on the information from the tracking means, the target manufacturing condition in the web processing apparatus is set in synchronization with the passage timing of the web processing apparatus at the product boundary, and the part corresponding to the product boundary in the web Line control means for operating the marking device so that the identification mark is attached to
An apparatus for producing a lithographic printing plate, comprising: A web joining portion in which a web front end portion is joined to a web rear end portion of the web sent out by the web delivery device, and a quality abnormality portion where manufacturing conditions by the web processing device deviate from the target processing conditions are along the transport path. Each has tracking means to track,
The line control means controls the marking apparatus on the basis of information from the tracking means so that the marking apparatus attaches the identification marks to the portions corresponding to the web joint portion and the quality abnormality portion in the web. 2. The apparatus for producing a lithographic printing plate according to claim 1, wherein the apparatus is controlled. 3. The lithographic printing plate manufacturing apparatus according to claim 1, wherein the marking device attaches a flaky identification label as the identification mark to an aluminum web.

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