JP6501623B2 - Method and apparatus for removing plating layer of gravure printing cylinder - Google Patents

Description

  The present invention relates to a method and an apparatus for removing a plating layer of a gravure printing cylinder.

  A ballard type cylinder is known as one of the types of gravure printing cylinders. The cylinder includes an underlayer forming a surface of the cylinder base, a plating layer formed by plating on the surface of the underlayer, and a ballard layer forming an interface between the underlayer and the plating layer. The plated layer generally has an engraved layer formed on the surface of the underlayer and a protective layer for protecting the same.

  In the ballard type cylinder, a solution called ballard solution is applied to the surface of the base layer in the manufacturing process, and then an engraving formation layer and a protective layer are sequentially formed on the base layer to form a plating layer from the base layer. The (engraved layer and protective layer) can be peeled off relatively easily. Thus, the cylinder base can be reused by peeling off the plating layer while leaving the base layer on the cylinder base side after completion of the gravure printing.

  Patent Document 1 discloses a method of stripping off the ballad plating (plated layer) of a used gravure printing roll (cylinder). FIG. 1 (a) of Patent Document 1 shows that the high pressure air jet nozzle 3 is used to peel off the ballard plating M on the circumferential surface of the roll in a spiral shape. FIG. 1 (c) of Patent Document 1 shows the use of the high pressure air jet nozzle 3, the flexible sheet 4 and the cutter blade 5 in combination to strip the ballad plating.

Japanese Patent Application Laid-Open No. 10-250251

  The present inventors are studying to automate (mechanize) the work of removing the plating layer from the gravure printing cylinder. The present inventors made various removal devices on trial and evaluated them. In the process, it has been found that although the plating layer can be removed well from the cylinder, the exposed underlayer may be damaged by the removal of the plating layer. If the underlayer is damaged, it may be necessary to repair the underlayer before reusing the cylinder base, or the cylinder base may have to be discarded if the extent of the damage is severe. The inventors examined the flaws generated in the underlayer, and it was found that the flaws caused by the cutter used for cutting the plated layer reaching the underlayer and the removed plated layer rushed to the underlayer It turned out that there was a scratch that was recognized as being caused by

  The present invention has been made in view of the above problems, and provides a removal method and removal apparatus capable of sufficiently suppressing the damage of the underlayer caused by the work of removing the plating layer from the gravure printing cylinder. With the goal.

  The present invention relates to a ballad type gravure printing cylinder, that is, a cylinder base having a cylindrical portion, an underlayer formed on the surface of the cylindrical portion of the cylinder base, and a plated layer formed outside the underlayer. The present invention relates to a method for removing a plating layer from a cylinder comprising an underlayer and a ballard layer forming an interface of the plating layer. The removal method according to the present invention comprises the steps of: (A) pressing the cutter against the cylinder so that the cutting edge of the cutter extends from the surface of the cylinder to the ballad layer; and (B) fixing the cylinder so as not to rotate. In this order, moving the cutting edge in the longitudinal direction of the cylinder to make a cutting line in the plating layer, and (C) peeling off the plating layer triggered by the entire cutting line extending in the longitudinal direction of the cylinder. Including. The cutters used in the steps (A) and (B) have a contact surface that contacts the surface of the cylinder, a cutting edge that protrudes from the contact surface toward the cylinder, and a projection length of the cutting edge from the contact surface And a projecting length adjusting mechanism for adjusting the length.

  According to the above removal method, it is possible to sufficiently prevent the underlayer from being damaged due to the operation of removing the plating layer from the cylinder. The reason is as follows. First, by using the cutter of the above construction in the steps (A) and (B), the cutting edge of the cutter reaches from the surface of the cylinder to the balled layer, but the protruding length of the cutting edge does not reach the underlayer. Can be adjusted. In this way, it is possible to sufficiently prevent the underlying layer from being damaged due to an operation of forming a cutting line in the plated layer by the cutter. Furthermore, after forming a cut line extending in the longitudinal direction of the cylinder in the (B) step, the plated layer is peeled off in the (C) step triggered by the entire cut line. By peeling off the plating layer triggered by the entire cutting line, it is possible to sufficiently suppress that the plating layer being peeled from touching the base layer, and thereby it is possible to sufficiently suppress the base layer from being damaged.

It is preferable to use a plurality of suction pads for the peeling of the plated layer in the step (C) from the viewpoint of more reliably suppressing the damage to the underlayer. In this case, it is preferable to carry out the following steps in the step (C).
(C1) disposing a plurality of suction pads along the cutting line in a region near the cutting line on the surface of the cylinder.
(C2) In a state where a plurality of suction pads suck a region near the cutting line of the cylinder, peeling away the plated layer constituting the surface of the cylinder by relatively moving the plurality of suction pads away from the position of the cutting line Force in the direction of

  As described above, the cutters used in the steps (A) and (B) are the contact surface that contacts the surface of the cylinder, the cutting edge that protrudes from the contact surface toward the cylinder, and the contact surface And a projection length adjustment mechanism for adjusting the projection length of the cutting edge. More specific embodiments of the cutter include the following. That is, one aspect of the cutter is a blade edge formed on the outer periphery of a disk-like disk, a frame having an opening for receiving the disk, an outer surface of the frame which constitutes the contact surface, and It has a notch formed on the outer surface, and a projection length adjusting mechanism for adjusting the projection length of the cutting edge from the notch on the outer surface. Another aspect of the cutter is a cylindrical member having a cutting edge at an end portion and an external thread formed on the side surface, a tubular member having an internal thread screwed with the external thread on its inner surface, and a tubular member It has one end surface and an end surface which constitutes the above-mentioned contact surface, and a projection length adjustment mechanism is constituted by a male screw of a cylindrical member and a female screw of a cylindrical member.

  The present invention provides an apparatus for removing a plating layer from a ballad type gravure printing cylinder. The removing device according to the present invention comprises a cylinder support which can support the cylinder so as not to rotate, a cutter for forming a cutting line extending from the surface of the cylinder to the ball bed, and a cutter and along the longitudinal direction of the cylinder. A cutter moving mechanism for moving the cutter, and a plating layer peeling mechanism for peeling the plating layer triggered by the entire cutting line formed by the cutter. The cutter has the same configuration as the cutter used in the (A) step and the (B) step.

  According to the removal apparatus, the removal method can be suitably implemented. That is, according to this removing device, it is possible to sufficiently suppress the damage to the underlayer due to the operation of removing the plating layer from the cylinder. The plated layer peeling mechanism supports the plurality of suction pads arranged along the longitudinal direction of the cylinder and the plurality of suction pads from the viewpoint of more reliably suppressing the damage to the foundation layer. It is preferable to have a suction pad support portion and a suction pad position changing mechanism that changes the radial position of the suction pad support portion with respect to the cylinder. According to this configuration, first, a plurality of suction pads can be arranged along the cutting line in the region near the cutting line on the surface of the cylinder. Thereafter, in a state where a plurality of suction pads adsorb a region in the vicinity of the cutting line of the cylinder, by moving the plurality of suction pads away from the position of the cutting line in the radial direction of the cylinder, A force in the peeling direction can be applied, whereby the plated layer can be peeled off triggered by the entire cutting line.

  According to the present invention, it is possible to sufficiently suppress the damage of the underlayer due to the work of removing the plating layer from the gravure printing cylinder.

It is sectional drawing which shows an example of the gravure printing cylinder of a ballade system. It is a perspective view which shows typically the structure of a part of one Embodiment of the removal apparatus which concerns on this invention. It is a perspective view which shows typically a mode that a cutting line is made into a cylinder by a cutter. It is sectional drawing which shows typically a mode that the blade edge | tip of the cutter has reached the ballad layer. It is a perspective view of the cutter shown in FIG. It is sectional drawing in the VI-VI line shown in FIG. It is a schematic diagram which shows the state which arrange | positioned several adsorption pads in the vicinity of a cut line. It is a perspective view which shows typically a mode that a plating layer is peeled with several adsorption pads by having taken the whole of a perforation line as a trigger. It is a top view which shows the other example of a cutter. (A) is a top view of a disk-shaped disc, (b) is a cross-sectional view taken along the line bb shown in (a).

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description, the same elements or elements having the same function are denoted by the same reference numerals, and redundant description will be omitted.

<Ballard type gravure printing cylinder>
FIG. 1 is a cross-sectional view showing an example of a ballad type gravure printing cylinder, and shows a cross section in a plane orthogonal to the longitudinal direction of the cylinder 10. As shown in the figure, the cylinder 10 includes a cylinder base 1, an underlayer 2 provided on the surface of the cylinder base 1, a ballad layer 3, and a plated layer 5 provided outside the ballad layer 3. The ballad layer 3 forms an interface between the underlayer 2 and the plated layer 5. The plating layer 5 includes an engraving forming layer 5a and a protective layer 5b, and these layers are formed in this order from the base layer 2 side. After the end of the gravure printing, the cylinder base 1 can be reused by peeling the plating layer 5 at the border of the ballad layer 3 while leaving the underlayer 2 on the cylinder base 1 side.

  The cylinder base 1 is, for example, a cylindrical member having a length of 300 to 5,000 mm and an outer diameter of 100 to 1,500 mm. Examples of the material of the cylinder base 1 include aluminum and iron.

  The underlayer 2 is a layer formed to cover the surface of the cylinder base 1. Examples of the material of the base layer 2 include copper, zinc, tin, nickel and alloys thereof, stainless steel and other alloys.

  The ballad layer 3 is located between the surface 2 f of the base layer 2 and the back surface 5 f of the engraving formed layer 5 a. The ballad layer 3 is formed by applying a liquid called a ballad liquid to the surface 2 f of the underlayer 2 in the process of manufacturing the cylinder 10. The thickness of the ballad layer 3 is, for example, about 60 to 130 μm, depending on the type and application amount of the ballad liquid to be used. As a ballad solution, for example, an aqueous solution of anhydrous sodium sulfite, silver nitrate or thiosulfuric acid or water can be used. After the application of the ballad solution, the engraving forming layer 5a and the protective layer 5b are sequentially formed by plating.

  Engraving layer 5a is formed to cover the surface of underlayer 2 coated with the ballad solution. The engraving forming layer 5a is formed by plating and has a thickness of, for example, about 60 to 300 μm. Examples of the material of the engraving forming layer 5a include copper, zinc, tin and their alloys, stainless steel and other alloys. The engraving forming layer 5a is formed by plating, and then a concave portion for gravure printing is engraved by a laser or the like.

  The protective layer 5b is for protecting the plate formed on the engraving formed layer 5a, and is formed to cover the surface of the engraving formed layer 5a. The protective layer 5 b is formed by plating and has a thickness of, for example, about 5 to 8 μm. Examples of the material of the protective layer 5b include chromium, nickel, zinc, and alloys thereof.

Remover
A removal apparatus 100 for removing the plating layer 5 from the cylinder 10 will be described with reference to FIGS. The removing device 100 includes a cylinder support 20 (see FIG. 2) that rotatably supports the cylinder 10, a rotation mechanism (not shown) that rotates the cylinder 10 in a state supported by the cylinder support 20, and the plating layer 5. The cutter 30 (see FIGS. 3 to 6) for inserting the cutting line 5c, a cutter moving mechanism (not shown) for moving the cutter 30 along the longitudinal direction of the cylinder 10, and plating with the whole cutting line 5c as a trigger And a plating layer peeling mechanism 40 (see FIGS. 7 and 8) for peeling the layer 5. Each component will be described below.

  As shown in FIG. 2, the pair of cylinder support portions 20 rotatably support the cylinder 10 with a center line C extending in the longitudinal direction of the cylinder 10 as a rotation center. The rotation mechanism allows the cylinder 10 to be rotated in the direction of arrow R in FIG. The rotation mechanism has a mechanism for locking the rotation of the cylinder 10, and it is also possible to support the cylinder 10 not to rotate. For example, a lathe can be used as an apparatus provided with the cylinder support portion 20, the rotation mechanism, and the cutter moving mechanism.

  As shown in FIG. 3, the cutter 30 moves in the direction of arrow A in FIG. 3 (longitudinal direction of the cylinder 10). In a state where the rotation is locked so as not to rotate in the direction of arrow R of the cylinder 10, the cutter 30 is pressed against the surface of the plating layer 5 and moved in the direction of arrow A. 10 can be cut line 5c. At this time, the blade edge 31a of the cutter 30 reaches a position not in contact with the surface of the underlayer 2, that is, in the middle of the ballad layer 3 (see FIG. 4) so as not to damage the underlayer 2. As described above, since the ballad layer 3 is a layer formed by application of the ballad liquid, its strength is sufficiently low. Therefore, if the cut line 5c from the surface 10a of the cylinder 10 to the ballad layer 3 is formed, the plated layer 5 can be peeled off triggered by the cut line 5c.

  5 is a perspective view of the cutter 30, and FIG. 6 is a cross-sectional view taken along the line VI-VI shown in FIG. As shown to these figures, the cutter 30 is comprised by the cylindrical member 31 which has the blade edge 31a at the edge part, and the cylindrical member (cylindrical member) 33 which accommodates the cylindrical member 31. As shown in FIG. A conical blade 31 a projects from an end face 33 a of the cylindrical member 33. The depth of the cutting line 5c can be set by adjusting the protruding length (the length L shown in FIG. 6) of the cutting edge 31a. The outer diameter of the cylindrical member 31 may be about 10 to 20 mm, and the outer diameter of the cylindrical member 33 may be about 30 to 50 mm. The cylindrical member 31, the blade edge 31a and the cylindrical member 33 may have sufficiently high mechanical strength. For example, as a material of the cylindrical member 31, carbon steel (for example, S45C) or tool steel (for example, SKD11) may be mentioned, and a blade edge 31a made of cemented carbide may be provided at the tip of the cylindrical member by brazing. . Alternatively, the entire cylindrical member 31 may be formed of high-speed steel or cemented carbide. Examples of the material of the cylindrical member 33 include carbon steel (for example, S45C), and a surface of carbon steel coated with hard chrome plating or titanium coating. Alternatively, the entire cylindrical member 33 may be formed of a super steel alloy. In addition, although the conical blade edge | tip 31a was illustrated here, the aspect of the blade edge | tip 31a is not limited to this.

  An external thread 31 b is formed on the side surface of the cylindrical member 31. The male screw 31b is formed to the middle of the side surface from the end 31c opposite to the end having the cutting edge 31a and in the direction of the cutting edge 31a. On the other hand, on the inner surface of the cylindrical member 33, a female screw 33b screwed with the male screw 31b is formed. The female screw 33 b is formed over the entire longitudinal direction of the cylindrical member 33. Since the male screw 31 b and the female screw 33 b are screwed together, the projection length L of the blade tip 31 a can be adjusted by rotating the cylindrical member 31 with respect to the cylindrical member 33.

  As shown in FIG. 3, the cutter 30 is used by being pressed perpendicularly to the surface 10 a of the cylinder 10. In this state, the end face 33a of the cylindrical member 33 abuts on the surface 10a. By forming the cutting line 5c in a state where the end face 33a of the cylindrical member 33 is in contact with the surface 10a of the cylinder 10, the cutting line 5c having a depth corresponding to the projection length L of the cutting edge 31a is formed in the cylinder 10. be able to. In order to form the cutting line 5c having a depth corresponding to the projection length L of the cutting edge 31a in the cylinder 10 with high accuracy, the angle between the end face 33a and the longitudinal direction of the cylindrical member 33 is 90 ° with sufficiently high accuracy. Is preferred. In addition, in order to press the cutter 30 against the surface 10a of the cylinder 10, for example, a mechanism (not shown) using an elastic force of a spring can be used.

  The plated layer peeling mechanism 40 is for peeling the plated layer 5 triggered by the entire cutting line 5c. As shown in FIGS. 7 and 8, the plating layer peeling mechanism 40 has a plurality of suction pads 42 arranged so as to be aligned along the longitudinal direction of the cylinder 10, and a suction pad support 45 that holds the plurality of suction pads 42. And a suction pad position mechanism (not shown) for changing the position of the suction pad support 45. The suction pad position changing mechanism is for changing the positions of the plurality of suction pads 42 with respect to the cylinder 10 (the positions in the radial direction from the surface 10 a of the cylinder 10).

  FIG. 7 is a schematic view showing a state in which a plurality of suction pads 42 are arranged in the vicinity of the cutting line 5c. Although depending on the diameter of the cylinder 10, the distance from the cutting line 5c to the suction pad 42 is preferably, for example, 10 mm or less. By setting this distance to 10 mm or less, the plating layer 5 can be peeled off sufficiently and stably triggered by the entire cutting line 5c. Each suction pad 42 is in communication with a pressure reducing mechanism (not shown), and in a state where the surface of suction pad 42 is in contact with surface 10 a of cylinder 10, pressure is adsorbed on surface 1 a by decompressing the space between them. Do. Although it depends on the size and suction force of the suction pad 42, the distance (pitch) between the central positions of the suction pads 42 adjacent in the longitudinal direction of the cylinder 10 may be about 50 to 300 mm, even if it is about 80 to 200 mm. Good.

  FIG. 8 is a perspective view schematically showing how the plating layer 5 is peeled off by the plurality of suction pads 42 triggered by the entire cutting line 5c. As shown in the figure, in a state in which a plurality of suction pads 42 suck the area near the cutting line 5c of the cylinder 10, the cylinder is moved away from the position of the cutting line 5c from the position of the cutting line 5c in the radial direction of the cylinder 10. A force can be applied to the plating layer 5 constituting the surface 10a of 10 in the peeling direction (arrow B direction shown in FIG. 7). After peeling off the plating layer 5 from the cylinder 10 by this force, the whole of the plating layer 5 is peeled off by rotating the cylinder support portion 20 in the direction of the arrow R at a low speed (for example, 5 to 20 rotations / minute). Can. The speed at which the plating layer 5 is peeled off (the speed at which the peeled portion travels in the circumferential direction of the cylinder 10) may be about 5 to 10 m / min.

  In this embodiment, although the thing which has a plurality of adsorption pads 42 as plating layer exfoliation mechanism 40 was illustrated, for example, a plurality of chuck hands (not shown) instead of adsorption pads 42 or with adsorption pads 42. ) May be adopted.

<Removal method>
Next, a method of removing the plating layer 5 from the used cylinder 10 will be described. The removal method according to the present embodiment includes the following steps (A) to (C) in this order.
(A) A step of pressing the cutter 30 against the cylinder 10 so that the cutting edge 31 a of the cutter 30 reaches from the surface 10 a of the cylinder 10 to the ballad layer 3.
(B) A step of moving the cutting edge 31a in the longitudinal direction of the cylinder 10 in a state where the cylinder 10 is fixed so as not to rotate, thereby forming the score line 5c in the plating layer 5.
(C) A step of peeling the plating layer 5 triggered by the whole of the score line 5 c extending in the longitudinal direction of the cylinder 10.

A plurality of suction pads 42 are used for the peeling of the plating layer 5 in the step (C) from the viewpoint of more reliably suppressing the damage to the underlayer 2. In this case, the following steps are carried out in the step (C).
(C1) disposing a plurality of suction pads 42 along the cutting line 5c in a region near the cutting line 5c of the surface 10a of the cylinder 10.
(C2) The surface 10a of the cylinder 10 is configured by relatively moving the plurality of suction pads 42 away from the position of the cutting line 5c in a state where the plurality of suction pads 42 sucks the region near the cutting line 5c of the cylinder 10. Apply a peeling force to the plated layer 5.

  According to this removal method, damage to underlying layer 2 due to the operation of removing plating layer 5 from cylinder 10 can be sufficiently suppressed. The reason is as follows. First, by using the cutter 30 in the (A) step and the (B) step, the blade edge 31 a of the cutter 30 reaches from the surface 10 a of the cylinder 10 to the ballad layer 3 but does not reach the underlayer 2 The protrusion length L of 31a can be adjusted (see FIG. 6). Thereby, damage to underlying layer 2 resulting from an operation of forming cut line 5c in plated layer 5 by cutter 30 can be sufficiently suppressed (see FIG. 4). Furthermore, after forming the cut lines 5c extending in the longitudinal direction of the cylinder 10 in the (B) step, the plated layer 5 is peeled off by the plurality of suction pads 42 triggered by the entire cut lines 5c in the (C) step. By peeling off the plating layer 5 triggered by the entire cutting line 5c, it can be sufficiently suppressed that the plating layer 5 being peeled is in contact with the base layer 2, whereby the damage of the base layer 2 can be sufficiently suppressed. (See Figures 7 and 8). Further, by removing the plating layer 5 from the cylinder 10 by peeling in this manner, expansion deformation of the cylinder base 1 due to heat can be suppressed as compared with the case of removing the plating layer 5 by cutting.

  Note that, from the state shown in FIG. 8, in order to complete the peeling operation of the entire plating layer 5, the cylinder 10 may be rotated in the arrow R direction while the suction pad support 45 is kept at the position shown in FIG. Alternatively, the suction pad support 45 may move away from the cylinder 10 in a state where the rotation is locked so that the cylinder 10 does not rotate in the direction of the arrow R. Alternatively, the entire plating layer 5 may be peeled off by keeping the cylinder 10 in a rotatable state and moving the suction pad support 45 away in the radial direction (the direction of arrow B shown in FIG. 8) from that state. In this case, the cylinder 10 rotates in the direction of the arrow R as the suction pad support 45 moves away in the radial direction of the cylinder 10.

  The removing device 100 according to the above embodiment may further include a blade (not shown) for scraping the plating layer attached to the side surface 10 b of the cylinder 10. Alternatively, prior to the peeling operation of the plating layer 5, a step of removing the plating layer attached to the side surface 10b by cutting may be performed. By limiting the plating layer to be removed by cutting to the side surface 10b of the cylinder 10, the influence of heat generated by cutting (expansion deformation of the cylinder base 1) can be minimized.

  As mentioned above, although embodiment of this invention was described in detail, this invention is not limited to the said embodiment. For example, although the case where cut line 5c is made in plating layer 5 with cutter 30 shown in Drawing 5 and 6 was illustrated in the above-mentioned embodiment, the cutter used is not limited to cutter 30. That is, the cutter adjusts the projection length for adjusting the projection length of the cutting edge from the abutment surface, the abutment surface abutting on the surface 10a of the cylinder 10, the cutting edge projecting toward the cylinder 10 from the abutment surface And a mechanism.

  FIG. 9 is a plan view showing another example of the cutter. The cutter 50 shown in the same figure is a cylinder 53 having a cutting edge 51a formed on the outer peripheral portion of a disk-like disk 51 (see FIG. 10), an opening 53a for accommodating the disk 51, and an outer surface of the frame 53 10, an outer surface 53b constituting a contact surface with respect to 10, a notch 53c formed on the outer surface of the frame, and a projection length adjustment mechanism for adjusting the projection length of the cutting edge 51a from the notch 53c of the outer surface 53b. Have. The disk 51 has a cutting edge 51a formed over the entire circumference of the outer peripheral portion. The disc 51 is fixed to the support plate 54 by a bolt B. When the sharpness of the cutting edge 51a is reduced, the disc 51 is rotated in a loosened state of the bolt B, and by tightening the bolt B again, the cutting line 5c can be formed at a portion where the sharpness of the cutting edge 51a is sharp. That is, the disk 51 has an advantage that it can be used for a long time. The angle of the outer peripheral portion of the disk 51 (the angle θ shown in FIG. 10B) may be about 30 to 60 °. Examples of the material of the cutting edge 51a include cemented carbide and high-speed steel.

  In the cutter 50, a projection length adjustment mechanism is configured by the adjustment handle 55, the dial position indicator 56, the tapered liner 57, and the rod member 58. The tapered liner 57 has a through hole into which the rod-like member 58 is inserted, and these contact portions are screwed together. By rotating the adjustment handle 55, the tapered liner 57 is moved in the left-right direction of FIG. 9 via the rod-like member 58, and the support plate 54 is moved in the vertical direction of FIG. 9 accordingly. As the adjustment handle 55, for example, one configured to move the tapered liner 57 by 1/100 mm in the left-right direction by rotating the handle one turn can be used. The end surface 57a of the tapered liner 57 and the end surface 54a of the support plate 54 are in contact with each other as shown in FIG. 9, and are inclined with respect to the left-right direction in FIG. By employing the projection length adjusting mechanism having the above configuration, the projection length of the cutting edge 51a from the notch 53c of the outer surface 53b can be adjusted. That is, by moving the tapered liner 57 in the left direction of FIG. 9, the projection length of the cutting edge 51a can be lengthened, and by moving the taper liner 57 in the right direction of FIG. 9, the projection length of the cutting edge 51a. Can be shortened. By adjusting the projection length of the blade edge 51a, it is possible to prevent the blade edge 51a from reaching the ballad layer 3 and not reaching the base layer 2 when the outer surface 53b is in contact with the surface 10a of the cylinder 10.

  As shown in FIG. 9, the frame 53 is supported by the moving member 60 via a slide bearing 59. The moving member 60 has a rod-like member 61 extending in a direction orthogonal to the longitudinal direction of the cylinder 10, a spring S wound on the outside of the rod-like member 61, and a spring pressure adjusting handle 62. The spring S is for pressing the outer surface 53b against the surface 10a of the cylinder 10 so as to be in close contact, and for relieving an impact that may occur in an operation of inserting the cut line 5c. By moving the moving member 60 in the longitudinal direction of the cylinder 10 by the moving mechanism (not shown), the cutting line 5 c can be inserted into the cylinder 10.

  In the above embodiment, in the step (C), a total of seven suction pads 42 are disposed along the entire cutting line 5c, and thereafter, the plating layer 5 is triggered by the entire cutting line 5c in one operation. Although the case where it exfoliates was illustrated, as long as the plating layer 5 is finally exfoliated triggered by the whole piercing line 5c, this operation may be divided and carried out in multiple times. For example, first, three suction pads 42 are arranged along the portion from the end of the cylinder 10 to the center in the longitudinal direction of the cutting line 5c, and the plating layer 5 is triggered by only half of the cutting line 5c. Then, a total of three suction pads 42 are disposed along the remaining half of the cutting line 5c, and the plating layer 5 is peeled off triggered by the other half of the cutting line 5c to finally cut. The plated layer 5 may be peeled off triggered by the entire line 5c.

Reference Signs List 1 cylinder base 2 base layer 3 ballad layer 5 plated layer 5a engraving formed layer 5b protective layer 5c cut line 10 gravure printing cylinder 10a surface 20 cylinder Support portion 30, 50: Cutter, 31: Columnar member, 31a, 51a: Cutting edge, 31b: Male thread, 33: Cylindrical member (cylindrical member), 33a: End surface (contact surface), 33b: Female screw, DESCRIPTION OF SYMBOLS 40 ... Plated layer peeling mechanism, 42 ... Suction pad, 51 ... Disk, 53 ... Frame, 53a ... Opening, 53b ... Outer surface (contact surface), 53c ... Notch part, 55 ... Adjustment handle, 56 ... Dial position indicator, 57: Tapered liner, 58: Rod member, 100: Removal device.

Claims (8)

A cylinder base having a cylindrical portion,
An underlayer formed on the surface of the cylindrical portion of the cylinder base;
A plated layer formed outside the underlayer;
A ballard layer forming an interface between the underlayer and the plating layer;
A method for removing the plating layer of a ballard type gravure printing cylinder capable of peeling the plating layer from the ballard layer,
(A) pressing the cutter against the cylinder so that the cutting edge of the cutter extends from the surface of the cylinder to the ballad layer;
(B) forming a cutting line in the plating layer by moving the cutting edge in the longitudinal direction of the cylinder in a state where the cylinder is fixed so as not to rotate;
(C) peeling off the plating layer triggered by the whole of the score line extending in the longitudinal direction of the cylinder;
In this order,
The cutter is
An abutment surface abutting on the surface of the cylinder;
The cutting edge protruding from the abutment surface toward the cylinder;
A projection length adjustment mechanism for adjusting the projection length of the cutting edge from the contact surface;
Have a removal method. In the step (C),
(C1) arranging a plurality of suction pads along the cut line in a region near the cut line on the surface of the cylinder;
(C2) The surface of the cylinder is configured by relatively moving the plurality of suction pads away from the position of the cutting line in a state where the plurality of suction pads suction the region near the cutting line of the cylinder. Applying a force in a peeling direction to the plated layer,
The removal method according to claim 1, comprising The cutter is
The cutting edge formed on the outer peripheral portion of the disk-like disc;
A frame having an opening for receiving the disc;
An outer surface of the frame that constitutes the abutment surface;
A notch formed on the outer surface of the frame;
The projection length adjusting mechanism for adjusting the projection length of the cutting edge from the notch portion of the outer surface;
The removal method of Claim 1 or 2 which has these. The cutter is
A cylindrical member having the cutting edge at an end and a male screw formed on a side surface;
A tubular member having on its inner surface a female screw which is screwed with the male screw;
One end face of the cylindrical member, the end face constituting the contact surface;
Have
The removal method according to claim 1 or 2, wherein the projection length adjustment mechanism is configured by the male screw of the cylindrical member and the female screw of the cylindrical member. A cylinder base having a cylindrical portion,
An underlayer formed on the surface of the cylindrical portion of the cylinder base;
A plated layer formed outside the underlayer;
A ballard layer forming an interface between the underlayer and the plating layer;
An apparatus for removing the plating layer of a ballard type gravure printing cylinder capable of peeling the plating layer from the ballard layer,
A cylinder support capable of supporting the cylinder not to rotate;
A cutter for forming a score line from the surface of the cylinder to the ballard layer;
A cutter moving mechanism for supporting the cutter and moving the cutter along the longitudinal direction of the cylinder;
A plated layer peeling mechanism that peels the plated layer triggered by the entire cutting line formed by the cutter;
Equipped with
The cutter is
An abutment surface abutting on the surface of the cylinder;
A blade edge from said abutment surface that protrude toward the cylinder,
A projection length adjustment mechanism for adjusting the projection length of the cutting edge from the contact surface;
With a removal device. The plating layer peeling mechanism is
A plurality of suction pads arranged in line along the longitudinal direction of the cylinder;
A suction pad support that supports the plurality of suction pads;
A suction pad position changing mechanism that changes the radial position of the suction pad support portion with respect to the cylinder;
The removal apparatus according to claim 5, comprising: The cutter is
The cutting edge formed on the outer peripheral portion of the disk-like disc;
A frame having an opening for receiving the disc;
An outer surface of the frame that constitutes the abutment surface;
A notch formed on the outer surface of the frame;
The projection length adjusting mechanism for adjusting the projection length of the cutting edge from the notch portion of the outer surface;
The removal apparatus according to claim 5 or 6, comprising: The cutter is
A cylindrical member having the cutting edge at an end and a male screw formed on a side surface;
A tubular member having on its inner surface a female screw which is screwed with the male screw;
One end face of the cylindrical member, the end face constituting the contact surface;
Have
The removal device according to claim 5 or 6, wherein the projection length adjustment mechanism is configured by the male screw of the cylindrical member and the female screw of the cylindrical member.

Images