JP3918066B2 - Metal plate processing apparatus and metal plate processing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a metal plate processing apparatus and a metal plate processing method, and more particularly to a metal plate processing apparatus and a metal plate processing method that can effectively prevent a trimming surface from undulating when a thin metal plate is trimmed.
[0002]
[Prior art]
The PS plate is generally subjected to surface treatment such as graining, anodizing, and silicate treatment on at least one surface of a continuous aluminum sheet in a band shape, and the obtained aluminum support web is subjected to the surface treatment. A plate making layer forming solution is applied to one side or two or more layers and dried, and a PS plate raw material having a photosensitive or heat sensitive plate making layer is cut into a predetermined size. The
[0003]
A predetermined number of PS plates manufactured in the above procedure are stacked, then packed and shipped.
[0004]
The PS plate original is usually cut using a cutting machine having a rotary blade C shown in FIG.
[0005]
As shown in FIG. 12, the rotary blade C has a disk-shaped upper blade A and lower blade B arranged so as to partially overlap each other, and as indicated by arrows b and c, the upper blade A and the lower blade C The blade B is rotated so as to move from the upstream side toward the downstream side with respect to the conveying direction a of the PS plate original fabric W in the overlapping portion, and the PS plate original fabric W is cut in the thickness direction.
[0006]
In FIG. 12, the position at the start of cutting where the PS plate original fabric W is bitten between the upper blade A and the lower blade B, the position where the upper blade A most overlaps the lower blade B, and the upper blade A is the PS plate original. Positions at the time of returning the blade that are separated from the opposite side W and return to the position before cutting are indicated by position (1), position (2), and position (3), respectively.
[0007]
At position {circle around (1)}, as shown in FIG. 13A, the blade edge surface A1 of the upper blade A descends along the lower blade B and cuts the web W. At position {circle around (2)}, as shown in FIG. 13B, the blade edge surface A1 of the upper blade A descends to the lowest position and then begins to rise. At position {circle around (3)}, as shown in FIG. 13C, the blade edge surface A1 rises along the lower blade B and returns to the position before cutting.
[0008]
[Problems to be solved by the invention]
However, at positions {circle around (2)} and {circle around (3)}, when the blade tip surface A1 rises, the blade tip end surface A3 that contributes to cutting at the upper blade A is cut by the upper plate A from the PS plate original fabric W. It contacts the formed cut portion W1.
[0009]
Therefore, the cutting portion W1 and the vicinity thereof may be raised upward by the blade tip surface A3 and may be deformed into a wavy shape.
[0010]
The present invention provides a metal that can effectively prevent the cut portion from being deformed into a wavy shape when cutting a strip-shaped metal plate such as the aluminum support web and the PS plate or trimming a side edge portion. It aims at providing a plate processing apparatus and a metal plate processing method.
[0011]
  The invention described in claim 1A pair of rotary blades arranged parallel to each other for cutting the end in the width direction of a continuous strip-shaped metal plate traveling in a fixed direction, and arranged downstream of the rotary blade along the conveying direction of the metal plate And a rotation roller of the rotary blade is disposed in parallel to the axis of the conveyance roller, and the conveyance roller extends from the central portion toward both ends. The crown roller has a reduced diameter, and a receiving roller that faces the crown roller across a conveyance surface that is a conveyance path of the metal plate, and has a central portion of the crown roller on the side far from the rotary blade. The half is nipped by the receiving roller with a nip pressure higher than the half on the side close to the rotary blade, so that the cutting edge of the rotary blade and the cut portion of the metal plate are in the traveling direction of the metal plate. Downstream It said metal plate to open at an opening angle of selfish 0.13 ° ~0.23 ° about the metal plate processing device for causing the skew.
[0012]
In the metal plate processing apparatus, when the blade returns to the position before cutting after the rotary blade cuts the edge in the width direction of the metal plate, in other words, the side edge along the longitudinal direction with a predetermined width, Since the cutting edge of the cutting blade does not contact the cutting portion, the cutting portion and the vicinity thereof in the metal plate are not deformed in a wave shape.
[0013]
Examples of the metal plate include the above-described aluminum support web and PS plate original. The metal plate processing apparatus can also be used for trimming of ordinary surface-treated metal plates such as painted steel plates and surface-treated steel plates, and stainless steel plates.
[0018]
In the metal plate processing apparatus, as the conveying roller, like the crown roller described in “2. Embodiment 2” in the section of “Embodiment of the Invention”, the central portion is thick and the diameter is reduced toward both ends. The metal plate can be skewed using a conveying roller.
[0020]
That the opening angle is 0.13 ° to 0.23 ° means that the point at the point moved 1000 mm downstream along the cutting portion with respect to the cutting start point of the metal plate in the rotary blade. In other words, the distance between the cutting portion and the virtual plane to which the cutting edge of the rotary blade belongs is 2.5 to 4 mm.
[0021]
If the opening angle is within the range, the cutting edge of the rotary blade does not contact the cutting portion when the blade is returned and the cutting portion is not deformed in a wave shape, and the rotary blade is cut when the metal plate is cut. No excessive force is applied to the metal plate.
[0022]
  Claim 2The present invention relates to a metal plate processing apparatus in which the metal plate is an aluminum support web used as a base material for a lithographic printing plate, having a roughened at least one surface of an aluminum thin plate continuous in a strip shape.
[0023]
The metal plate processing apparatus is an example in which the metal plate processing apparatus of the present invention is used for cutting or trimming an aluminum support web.
[0024]
  Claim 3The described invention relates to a metal plate processing apparatus in which the metal plate is a planographic printing plate formed by forming a plate-making layer on the roughened side surface of the aluminum support web.
[0025]
The metal plate processing apparatus is an example in which the metal plate processing apparatus of the present invention is used for cutting or trimming a PS plate original.
[0027]
In the metal plate processing method, since the cutting edge of the cutting blade does not contact the cutting portion when the cutting blade returns, the cutting portion and the vicinity thereof in the metal plate may be deformed in a wave shape. Absent.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
1. Embodiment 1
An example of a processing line for producing a PS plate by cutting the PS plate material into a predetermined size is shown in FIG. Hereinafter, the PS plate stock is referred to as “web”.
[0029]
In the processing line shown in FIG. 1, the metal plate processing apparatus of the present invention is used. FIG. 1 shows a state in which the web 12 is cut in the processing line. Details of the configuration of the metal plate processing apparatus in the processing line are shown in FIG.
[0030]
As shown in FIGS. 1 and 2, the web 12 previously wound in a roll is sequentially unwound on the most upstream side of the processing line 90, that is, on the side where the web 12 is fed, in other words, on the upper right side in FIG. A delivery machine 14 is disposed, and a leveler 15 is disposed on the downstream side of the delivery machine 14, that is, in the direction in which the web 12 is delivered. A feed roller 16 is disposed on the downstream side of the leveler 15.
[0031]
A notch 20 is provided on the downstream side of the feed roller 16 to provide a punched portion on the web 12, and a cutting unit 21 is provided on the downstream side of the notch 20. The cutting unit 21 includes a metal plate processing apparatus 10 that cuts the web 12 to a predetermined width and simultaneously trims both side edges.
[0032]
On the downstream side of the metal plate processing apparatus 10, a length measuring device 26, a running cutter 28, a conveyor 32, a stacking unit 34, and a conveying unit 35 are sequentially arranged.
[0033]
The web 12 delivered by the delivery device 14 is curled and corrected by the leveler 15 and electrostatically bonded to the interleaf paper 18 by the feed roller 16.
[0034]
The web 12 to which the outer paper 18 is bonded is provided with a notch 20 in the notch 20 and a punching portion that guides a cutting roller portion 24 and a trimming portion 25 described later in the metal plate processing apparatus 10 to a predetermined cutting position. And cut along the conveying direction.
[0035]
The cutting waste 86 generated by cutting by the metal plate processing apparatus 10 is sent to a chopper (not shown) and cut into small pieces, and then collected in a collection box 84 by a collection conveyor 82, and the interleaf paper 18 is sucked into the suction pipe 23. With suction processing.
[0036]
In this way, the web 12 cut to a predetermined width is detected by the length measuring device 26, and is cut along the width direction by the running cutter 28 at the instructed timing. Thereby, the PS plate 30 having the set size is manufactured.
[0037]
Next, the PS plate 30 is sent to the stacking unit 34 by the conveyor 32, stacked by a predetermined number, stacked on the pallet 33 through the transport unit 35, and sent to the storage or packaging process. In FIG. 1, reference numeral 31 denotes an integrated bundle in which a predetermined number of PS plates 30 are stacked.
[0038]
The thickness of the web 12 cut in the processing line 90 is usually 0.15 to 0.4 mm, but is not particularly limited to the above range.
[0039]
As shown in FIG. 2, the metal plate processing apparatus 10 includes a horizontally long rectangular frame 10 </ b> A provided so as to surround a conveyance surface T that is a conveyance path of the web 12, and an opening of the frame 10 </ b> A. It has a cutting roller part 24 that is located in the center and cuts the web 12 to a predetermined width, and two trimming parts 25 that are located at both ends of the opening and that trim both side edges of the web 12. In the metal plate processing apparatus 10, the conveyance surface T is a flat surface extending in the horizontal direction. The width of the PS plate original to be trimmed in the trimming unit 25 can be appropriately determined according to the size of the PS plate to be manufactured, but is usually set in the range of 4 to 200 mm.
[0040]
As shown in FIG. 2, the trimming unit 25 includes an upper blade 48 that is a rotary blade fixed to a rotary shaft 78 extending in parallel with the transport surface T and a transport surface T above the transport surface T. The lower blade 54 is a rotary blade that is positioned on the opposite side of the rotary shaft 78 and is fixed to the rotary shaft 80 that extends parallel to the rotary shaft 78. The rotation shaft 78 and the rotation shaft 80 are formed on the frame body 10A from the base 46 that can move in a direction perpendicular to the conveyance direction of the web 12 along the rail 44 provided on the lower frame of the frame body 10A. It extends toward the center of the opening. Both the rotary shaft 78 and the rotary shaft 80 are rotated around the axis line at the same speed in the transport direction by appropriate driving means (not shown). Therefore, the rotating shaft 78 and the rotating shaft 80 rotate in opposite directions. The upper blade 48 and the lower blade 54 correspond to a cutting blade or a rotary blade in the metal plate processing apparatus of the present invention.
[0041]
As shown in FIGS. 2 to 5, the upper blade 48 is formed in a dish shape having a conical outer peripheral surface whose outer diameter decreases toward the direction toward the base 46, in other words, outward. On the large-diameter side, a part of the outer peripheral portion protrudes downward from the conveyance surface T. A cutting edge surface 59 is formed on the outer peripheral surface of the upper blade 48 on the large diameter side, that is, on the outer periphery on the large diameter side.
[0042]
A circular recessed portion 58 is formed concentrically with the upper blade 48 on the surface on the large diameter side of the upper blade 48, and a groove-shaped recessed portion 60 is formed on the peripheral edge of the recessed portion 58. Therefore, when polishing the upper blade 48, it is only necessary to polish the outer side of the recessed portion 58 on the surface on the large diameter side, so that labor during polishing can be saved. Further, since the recessed portion 60 is formed, it is possible to prevent the cutting edge surface 59 from being damaged when the polishing tool hits the cutting edge of the upper blade 48 when the recessed portion 58 is polished.
[0043]
On the outside of the recessed portion 58 on the large-diameter surface, an annular bulging allowance recessed portion 62 that allows the cutting portion 12C of the web 12 to bulge toward the large-diameter surface of the upper blade 48 is recessed. It is formed concentrically with the part 58. The swelling allowance recessed portion 62 corresponds to a swelling allowance portion in the metal plate processing apparatus of the present invention. The maximum depth of the bulging allowance recessed portion 62 is usually in a range of 0.1 mm to 0.5 mm, but can be appropriately determined according to cutting conditions. As shown in FIG. 4, the bulging allowable recess 62 has a cross-sectional shape that becomes deeper toward the periphery, but the cross-sectional shape of the bulging allowable recess 62 is not limited to this.
[0044]
As shown in FIG. 4, as shown in FIG. 4, the web 12 is cut between the outer periphery of the bulging allowance recessed portion 62 on the large diameter side surface of the upper blade 48 and the cutting edge surface 59 from the bulging allowance recessed portion 62 to the cutting edge. A blade tip surface 66 that contributes to the above is formed. The width of the blade tip surface 66, that is, the blade tip width L is 0.05 to 0.5 mm. If the blade tip width L is within the above range, the upper blade 48 hardly spills during cutting, and the blade tip surface 66 and the cutting portion 12C come into strong contact with each other when the blade returns, and the cutting portion 12C is distorted. It is possible to prevent the return of the surface of the web 12 from occurring.
[0045]
Between the recessed portion 58 and the bulging allowable recessed portion 62 on the large diameter side surface of the upper blade 48, a planar offset surface 64 that is offset by a depth C1 from the blade tip surface 66 is formed. The offset depth C1 is usually in the range of 0.05 to 0.30 mm, but can be appropriately determined according to the cutting conditions.
[0046]
Moreover, although the blade edge | tip front-end | tip width L in the upper blade 48 has the preferable range of 0.05-0.5 mm, it is not limited to the range.
[0047]
As shown in FIG. 2, the pressing roller 22 is integrally provided on the surface of the upper blade 48 near the center of the frame 10 </ b> A. The pressing roller 22 is rotatably provided on the rotary shaft 78.
[0048]
The pressing roller 22 has an outer peripheral surface 22A formed in a conical surface shape whose outer diameter decreases in the direction toward the center of the frame 10A, and the large-diameter surface is offset from the upper blade 48 as shown in FIG. It arrange | positions so that the surface 64 may be contact | abutted. The outer diameter of the large diameter portion is smaller than the diameter of the outer periphery of the bulging allowance recessed portion 62 of the upper blade 48 and is formed to a size capable of pressing the web 12. Therefore, when the web 12 is cut, the pressing roller 22 rotates at the same circumferential speed as the web 12 conveyance speed in the same direction as the web 12 conveyance direction while pressing the cutting portion 12C from the surface 12A of the web 12. To do.
[0049]
As shown in FIGS. 2 and 5, the lower blade 54 is formed in a disk shape, and the rotation shaft is arranged such that the surface facing the base 46 abuts the peripheral edge of the surface on the large diameter side of the upper blade 48. 80 is fixed concentrically. K in FIG. 5 indicates the distance from the outer periphery of the lower blade 54 to the outer periphery on the larger diameter side of the upper blade 48, in other words, the amount of overlap between the lower blade 54 and the upper blade 48, in other words, the amount of biting. The biting amount K is preferably in the range of 0.05 mm to 1 mm, particularly preferably in the range of 0.2 to 0.5 mm.
[0050]
A cutting edge surface 55 is formed on the outer periphery of the lower blade 54, and a cutting edge tip surface 57 is formed on the peripheral edge portion of the surface in contact with the upper blade 48.
[0051]
As shown in FIG. 2, a receiving roller 42 is rotatably provided adjacent to the lower blade 54 and concentrically with the lower blade 54 between the lower blade 54 and the base 46 on the rotary shaft 80. On the side adjacent to the lower blade 54 of the receiving roller 42, a reduced diameter portion 42 </ b> A that is a reduced diameter portion whose outer diameter decreases conically toward the lower blade 54 is formed. The reduced diameter portion 42A is formed so that the cutting edge surface 59 of the upper blade 48 does not contact.
[0052]
A support roller 40 is provided concentrically with the lower blade 54 and the receiving roller 42 on the opposite side to the receiving roller 42 across the lower blade 54 of the rotary shaft 80 and is rotatably provided. Therefore, when the web 12 is cut, the support roller 40 and the receiving roller 42 are in contact with the back surface 12B of the web 12 and rotate in the same direction as the web 12 in the conveyance direction of the web 12 at the same speed. To do.
[0053]
The positional relationship when the upper blade 48 and the lower blade 54 are viewed from above is shown in FIG. In FIG. 6, an arrow a indicates the conveyance direction of the web 12, and an arrow b and an arrow c indicate the rotation directions of the upper blade 48 and the lower blade 54, respectively. The same applies to the following drawings. The receiving roller 42 is omitted.
[0054]
As shown in FIG. 6, in the trimming portion 25, the upper blade 48 and the lower blade 54 are between the blade tip surface 66 of the upper blade 48, the blade tip surface 57 of the lower blade 54, and the cutting portion 12 </ b> C of the web 12. In addition, the openings of the same size are formed from the upstream side toward the downstream side. Therefore, the rotary shaft 78 and the rotary shaft 80 are arranged in parallel to each other and at a predetermined angle with respect to the transport direction a. As shown in FIG. 6, the rotation axis 78 of the upper blade 48 and the rotation axis 80 of the lower blade 46 are the plane P to which the blade tip surface 66 of the upper blade 48 and the blade tip surface 57 of the lower blade 54 belong, and the cutting portion 12C. Is a range of 2.5 to 4 mm at a point where the web 12 is moved 1000 mm along the cutting portion 12 </ b> C in the downstream direction from the position {circle around (1)} between which the web 12 is caught between the upper blade 48 and the lower blade 54. It is preferable that it is arrange | positioned so that it may become.
[0055]
If the opening between the upper blade 48 and the lower blade 54 and the cutting portion 12C is within the above range, the cutting portion 12C of the web 12 does not come into contact with the upper blade 48 and the lower blade 54 when the blade is returned, and the cutting is performed. There will be no trouble.
[0056]
On the downstream side of the upper blade 48 and the lower blade 54, conveying rollers 83A and 83B for conveying the web 12 along the conveying direction a are disposed.
[0057]
Each of the transport rollers 83A and 83B has a cylindrical body and is disposed along a direction perpendicular to the transport direction a.
[0058]
As shown in FIG. 2, the cutting roller portion 24 positioned at the center of the frame 10 </ b> A is provided with a rotation shaft 79 that rotates in the conveyance direction of the web 12 by an appropriate driving unit (not shown), and a rotation shaft 79. A pair of upper blades 50 fixed concentrically, and a pair of rotatable pressing rollers 29 arranged concentrically on the rotary shaft 79 so as to sandwich the pair of upper blades 50 adjacent to the pair of upper blades 50; By a suitable driving means (not shown), a rotating shaft 81 rotating around the axis line at the same speed as the rotating shaft 79 in the conveying direction of the web 12, and a rotating shaft 81 corresponding to the upper blade 50. A pair of lower blades 56 fixed concentrically, and a pair of rotatable support rollers 41 provided concentrically with the rotation shaft 81 adjacent to the surface of the lower blade 56 facing the both ends of the frame 10A. Prepare.
[0059]
The rotation shaft 79 and the rotation shaft 81 are located on opposite sides of the conveyance surface T.
[0060]
A disc spring 52 is provided between the pair of upper blades 50 to bias the upper blades 50 away from each other.
[0061]
As shown in FIGS. 2 to 5, the upper blade 52 is formed in the same manner as the upper blade 48 except that the thickness is thinner. Therefore, it has a substantially dish shape having a conical outer peripheral surface, and a part of the outer peripheral portion protrudes downward from the conveying surface T on the large diameter side. Further, the recessed portion 58, the recessed portion 60, the bulging allowance recessed portion 62, the offset surface 64, and the blade edge tip surface 66 are formed in the same manner, and the blade edge tip width L is in the same range as the upper blade 48.
[0062]
As shown in FIG. 2, the upper blade 50 is disposed on the small diameter side so as to face each other with the disc spring 52 interposed therebetween.
[0063]
As shown in FIG. 2, the lower blade 56 is also formed in the same manner as the lower blade 54 except that the thickness is thinner. The lower blade 56 is positioned so as to sandwich the upper blade 50 from both sides, and is in contact with the surface on the large diameter side of the upper blade 50 with a biting amount K on the inner side, that is, on the surface facing the center portion of the frame 10A. ing. The upper blade 50 is pressed against the lower blade 56 by the biasing force from the disc spring 52 at the overlapping portion of the upper blade 50 and the lower blade 56.
[0064]
A cutting waste receptacle 72 is formed adjacent to the pair of lower blades 56 so as to be sandwiched between the lower blades 56. The cutting waste receptacle 72 is a reduced diameter portion formed so that the diameter decreases conically toward the lower blade 56 so as to correspond to the shape of the outer peripheral surface of the upper blade 50, and the cutting edge surface of the upper blade 50 59 is formed so as not to contact.
[0065]
Next, how the web 12 is cut, in other words, cut in the metal plate processing apparatus 10 will be described. FIG. 7 shows a state in which the web 12 is cut by the upper blade 48 and the lower blade 54, and the upper blade 50 and the lower blade 56.
[0066]
As shown in FIGS. 1 to 7, the web 12 sent out by the sending machine 14 passes through the inside of the opening of the frame body 10 </ b> A along the transport surface T. Since the web 12 passes between the upper blade 48 and the lower blade 54 and between the upper blade 50 and the lower blade 56 in the trimming portion 25 and the cutting roller portion 24, the upper blade 48 and the lower blade 54. , And between the upper blade 50 and the lower blade 56, and a shearing force acts in the thickness direction of the web 12. As a result, the web 12 is cut by the cutting roller unit 24 and the trimming unit 25. The cutting waste 86 generated by the cutting is discharged to the outside of the metal plate processing apparatus 10 by the upper blade 48 and the reduced diameter portion 42A, and the upper blade 50 and the cutting waste receiver 72.
[0067]
The web 12 is pressed from above by the outer peripheral surface 22A of the pressing roller 22 on the front surface 12A while being supported by the lower blade 54 or the lower blade 56 on the back surface 12B. Therefore, the cut portion 12C in the web 12 is partially deformed, and an inclined surface that is continuous with the surface 12A and inclined at a predetermined inclination angle θ with respect to the surface 12A is formed. At the same time, the cutting portion 12C is plastically deformed in the direction toward the upper blade 48 or the upper blade 50 and bulges, and enters the bulging allowance recessed portion 62. Therefore, since the deformation flow of the support body of the web 12 is allowed, the web 12 can be reliably deformed even if the pressing force of the pressing roller 22 is small.
[0068]
8 and 9 show the positional relationship between the upper blade 48, the lower blade 54, and the web 12 at the time of cutting, pressing, and after cutting in the trimming unit 25. FIG. In FIG. 8, the web 12 is shown to be wound around the lower blade 54 so as to form a mountain, but the web 12 is usually transported almost flatly. In FIG. 8, the pressing roller 22 is omitted.
[0069]
At the position {circle around (1)} where the web 12 is caught between the upper blade 48 and the lower blade 54, the cutting edge surface 59 of the upper blade 48 extends along the lower blade 54 as shown in FIG. Lower and cut the web 12. Then, at the position {circle around (2)} in which the cutting portion 12C of the web 12 is most strongly pressed by the pressing roller 22, the cutting edge surface 59 of the upper blade 48 is further lowered as shown in FIG. The cutting portion 12C of the web 12 is pressed downward by the pressing roller 22 and an inclined surface is formed on the cutting portion 12C. At the same time, the cutting portion 12C bulges toward the bulging allowance portion of the upper blade 48. Then, at the position (3) at the time of returning the blade where the blade edge surface 59 of the upper blade 48 is separated from the web 12 and returns to the position before cutting, the blade edge 59 of the upper blade 48 is as shown in FIG. Ascending along the lower blade 54.
[0070]
Here, as described above, the upper blade 48 and the lower blade 54 are disposed so as to open with respect to the cutting portion 12C on the downstream side with respect to the transport direction a. As shown in (C), at the position {circle around (1)}, the upper blade 48 is almost in contact with the cutting portion 12C, slightly separated at the position {circle around (2)}, and further separated at the position {circle around (3)}. Therefore, the upper blade 48 does not contact the cutting portion 12C when the blade returns after cutting.
[0071]
In the metal plate processing apparatus 10 in the processing line 90 according to the first embodiment, the web 12 can be sheared under a shearing condition in which burrs on the back surface are reduced or not generated at all, and the pressing roller 22 and the lower blade 54 or the lower blade 56, by pressing the cutting part 12C and forming the bulging part, it is possible to more effectively prevent the generation of burrs in the PS plate 30. An inclined surface is formed.
[0072]
Further, in the trimming portion 25 of the metal processing apparatus 10, the blade tip end surface 66 of the upper blade 48 and the blade tip end portion 57 of the lower blade 54 do not come into contact with the cutting portion 12C when the blade is returned. Even if the cutting edge tip width L of the blade 48 is 0.5 mm or more, the cutting portion 12C comes into contact with the cutting edge tip surface 66 and the cutting edge tip portion 57 to cause a return or distortion on the surface 12A side of the web 12. There is nothing.
[0073]
Furthermore, since the upper blade 48 and the lower blade 54 are disposed so that the blade tip surfaces 66 and 57 are parallel to each other, no twisting force acts on any of the rotary shafts 78 and 80. There is no mechanical problem.
[0074]
Furthermore, in the cutting roller portion 24, the tip end width L of the upper blade 50 is set in the range of 0.5 to 0.05 mm, so that the tip end portion of the upper blade 50 that rises when the blade is returned to the cutting portion 12C. There is no strong contact. Accordingly, defects such as return to the surface side, distortion, and notches do not occur in the vicinity of the cut portion 12C.
[0075]
In addition, since the upper blade 50 is not spilled at the time of cutting, the photosensitive layer 12D is not damaged or defective due to the blade spill.
[0076]
Therefore, when printing is performed using the PS plate 30 obtained by the processing line 90, since unnecessary ink does not adhere to the printing paper surface, a high quality printed matter can be obtained. Furthermore, for example, when the PS plate 30 is transported in an exposure machine, the PS plate 30 does not meander, so that the PS plate 30 is excellent in handleability.
[0077]
Moreover, in the metal plate processing apparatus 10, since the upper blade 48 and the upper blade 50 and the pressing roller 22 are disposed on the same rotation axis, the upper blade 48 and the upper blade 50 and the pressing roller 22 with respect to the web 12 are arranged. The relative position of the web 12 is not shifted, and the cutting position of the web 12 and the position of the inclined surface 12E are not shifted. Therefore, the PS plate 30 having the inclined surface 12E can be obtained with high positional accuracy. Further, since it is not necessary to separately provide a member for forming the inclined surface 12E on the web 12, the structure of the metal plate processing apparatus 10 is simplified and the processing line 90 can be shortened.
[0078]
As mentioned above, although the example of the processing line which has a metal plate processing apparatus provided with a pair of rotary blade was demonstrated, it replaces this application also in the processing line provided with what is called a guillotine cutter instead of a pair of rotary blade as a cutting member. Needless to say, the invention of claim 1 can be applied.
2. Embodiment 2
An example in which the metal plate processing apparatus 11 is used in place of the metal plate processing apparatus 10 in the processing line of the first embodiment will be described below.
[0079]
The processing line according to the second embodiment has the same configuration as the processing line 90 according to the first embodiment except that the metal plate processing apparatus 11 is used instead of the metal plate processing apparatus 10.
[0080]
FIG. 10 shows the metal plate processing apparatus 11 as viewed from the upstream side with respect to the conveyance direction “a” of the web 12, and FIG. 10 and 11, the same reference numerals as those in FIGS. 1 to 9 denote the same elements as those shown in the drawings. Reference numeral 11A denotes a frame similar to the frame 10A in FIG.
[0081]
In the pair of trimming unit 25 and cutting roller unit 24 in the metal plate processing apparatus 11, the rotary shafts 78 and 79 of the upper blade are disposed on the same axis. In this case, the same applies to the rotary shafts 80 and 81 of the lower blade.
[0082]
As shown in FIGS. 10 and 11, the metal plate processing apparatus 11 is further provided with a conveyance unit 83 that conveys the web 12 to the downstream side of the trimming unit 25 and the cutting roller unit 24.
[0083]
The transport unit 83 includes a crown roller 83A positioned above the transport surface T and a receiving roller 83B positioned below the transport surface T.
[0084]
The crown roller 83 </ b> A and the receiving roller 83 </ b> B are disposed in parallel to the rotation shaft 78 of the upper blade 48 and the rotation shaft 80 of the lower blade 54 in the trimming portion 25.
[0085]
Here, the surface of the crown roller 83A is formed in a shape that decreases in diameter conically from the center toward both ends.
[0086]
However, the crown roller 83A is pressed against the receiving roller 83B so that the nip pressure of the left half in FIG. 11 is higher than the nip pressure of the right half, and the left end of the crown roller 83A has a diameter larger than that of the center. Since it is small, the conveyance direction of the web 12 is slightly deflected in the left direction in FIG. 11 as indicated by an arrow a ′ in FIG. 11 as indicated by an arrow a ′ in FIG. Therefore, the cutting part 12 </ b> C of the web 12 moves away from the upper blade 48 and the lower blade 54 in the trimming part 25.
[0087]
Since the metal plate processing apparatus 11 can control the conveyance direction of the web 12 by changing the nip balance of the crown roller 83A with respect to the receiving roller 83B, a special apparatus for changing the conveyance direction of the web 12 is unnecessary.
[0088]
As mentioned above, the processing line provided with the metal plate processing apparatus of the present invention and used for the production of the PS plate has been described. However, the processing line is not limited to the PS plate described in JP-A No. 10-100536. A lithographic printing plate that is used as a so-called discard plate without a layer, a PS plate in which a photosensitive layer is formed on both sides of an aluminum support, and a photopolymer or a thermopolymerizable prepolymer are used as a photosensitive layer. Needless to say, it can also be used to manufacture PS plates used in digital printing plates.
[0089]
【The invention's effect】
As described above, according to the present invention, when the strip-shaped metal plate is cut or the side edge portion is trimmed, it is possible to effectively prevent the cutting portion from being deformed into a wavy shape. And a metal plate processing method is provided.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an overall configuration of an example of a PS plate processing line provided with a metal processing apparatus according to the present invention.
FIG. 2 is a front view showing details of the configuration of the metal plate processing apparatus provided in the processing line shown in FIG. 1;
FIG. 3 is a cross-sectional view showing details of an upper blade provided in the metal plate processing apparatus shown in FIG. 2;
FIG. 4 is an enlarged view showing the vicinity of a tip end surface of the upper blade shown in FIG. 3;
5 is a partial cut showing a state in which the PS plate original fabric, that is, the web is cut by the upper blade and the lower blade, and the cut portion of the web is pressed by the pressing roller in the metal plate processing apparatus shown in FIG. FIG.
6 is a top view of the upper blade, the lower blade, and the web when the upper blade and the lower blade of the trimming portion of the metal half-working apparatus shown in FIG. 2 are cutting the web. FIG. It is the schematic which shows a mutual positional relationship.
7 is a cross-sectional view in a direction perpendicular to the web conveyance direction, showing a state in which the web is cut in the metal plate processing apparatus shown in FIG. 2;
FIG. 8 is a side view of the trimming portion when viewed from the side with respect to the web conveyance surface of the upper blade, the lower blade, and the web when the upper blade and the lower blade of the trimming part are cutting the web. It is the schematic which shows a relative positional relationship.
FIG. 9 is a schematic diagram showing a relative positional relationship between an upper blade, a lower blade, and a web in a metal plate processing apparatus at the start of cutting, when pressed, and when the blade is returned.
FIG. 10 is a schematic diagram illustrating a configuration of a metal plate processing apparatus provided in a processing line according to a second embodiment.
FIG. 11 is a top view of the upper blade, the lower blade, and the web when the upper blade and the lower blade of the trimming unit in the metal plate processing apparatus shown in FIG. 10 cut the web. It is the schematic which shows a mutual positional relationship. .
FIG. 12 is a schematic view showing the positional relationship of the upper blade, the lower blade and the web viewed from the side when the web is cut in a conventional cutting machine.
FIG. 13 is a schematic view showing the positional relationship between the upper blade, the lower blade, and the web viewed from the downstream side in the web conveyance direction when the web is cut in a conventional cutting machine. It is.
[Explanation of symbols]
10 Metal plate processing equipment
11 Metal plate processing equipment
12 Web
12C cutting part
14 Transmitter
21 Cutting unit
24 Cutting roller
25 Trimming section
30 PS version
48 upper blade
54 Lower blade
90 processing line

Claims (3)

  A pair of rotary blades arranged in parallel to each other for cutting the widthwise end of a continuous strip-shaped metal plate running in a fixed direction;
A transport roller disposed downstream of the rotary blade along the transport direction of the metal plate, and transports the metal plate;
Have
The rotation axis of the rotary blade is disposed in parallel to the axis of the transport roller,
The conveyance roller includes a crown roller that decreases in diameter from the center toward both ends, and a receiving roller that faces the crown roller across a conveyance surface that is a conveyance path of the metal plate. The half of the side far from the rotary blade with the central portion as a boundary is nipped by the receiving roller with a higher nip pressure than the half of the side close to the rotary blade, thereby cutting the blade edge of the rotary blade and the metal plate The metal plate processing apparatus is characterized in that the metal plate is skewed so that the portion opens at an opening angle of 0.13 ° to 0.23 ° toward the downstream direction with respect to the traveling direction of the metal plate. . 2. The metal plate processing apparatus according to claim 1, wherein the metal plate is an aluminum support web formed by roughening at least one surface of an aluminum thin plate that is continuous in a strip shape, and is used as a base material of a lithographic printing plate. 2. The metal plate processing apparatus according to claim 1, wherein the metal plate is a lithographic printing plate in which a plate-making layer is formed on a roughened side surface of the aluminum support web.

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