EP0505508B1 - Längsschneideeinrichtung für wellpappe u.dgl. - Google Patents

Längsschneideeinrichtung für wellpappe u.dgl. Download PDF

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Publication number
EP0505508B1
EP0505508B1 EP91906107A EP91906107A EP0505508B1 EP 0505508 B1 EP0505508 B1 EP 0505508B1 EP 91906107 A EP91906107 A EP 91906107A EP 91906107 A EP91906107 A EP 91906107A EP 0505508 B1 EP0505508 B1 EP 0505508B1
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EP
European Patent Office
Prior art keywords
blade
sheet
edge
tool
tool head
Prior art date
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Expired - Lifetime
Application number
EP91906107A
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English (en)
French (fr)
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EP0505508A1 (de
Inventor
Richard F. Paulson
Kent L. Ross
Timothy C. Prochnow
David W. Dix
Luke A. Stout
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Marquip Inc
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Marquip Inc
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/088—Means for treating work or cutting member to facilitate cutting by cleaning or lubricating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
    • B24B3/368—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades installed as an accessory on another machine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
    • B24B3/46—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of disc blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/14—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter
    • B26D1/24—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter coacting with another disc cutter
    • B26D1/245—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter coacting with another disc cutter for thin material, e.g. for sheets, strips or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/12—Means for treating work or cutting member to facilitate cutting by sharpening the cutting member

Definitions

  • the present invention relates to an apparatus for slitting a traveling corrugated paperboard sheet and, in particular, to a thin rotary blade slitting apparatus for substantially improving the quality of the slit.
  • Apparatus for longitudinally slitting a continuous traveling sheet or web of corrugated paperboard is well known in the art. Such apparatus is often combined with a mechanism for simultaneously providing longitudinal score lines to the advancing sheet, which score lines facilitate subsequent folding in the construction of boxes or the like.
  • a combined "slitter-scorer" utilizes pairs of rotatable cutting tools and scoring tools disposed in the path of the advancing sheet, with one tool of each pair disposed on an opposite side of the sheet.
  • multiple slitting tools are mounted coaxially and laterally spaced across the width of the sheet and, likewise, multiple scoring tools are also coaxially mounted and spaced across the sheet width.
  • each pair of upper and lower slitting tools is disposed with overlapping radial cutting edges between which the advancing paperboard sheet is moved to provide a continuous cut.
  • the cutting tools in fact shear the moving sheet causing a relative vertical displacement of the cut edges from one another.
  • the cuts tend to become more ragged, the edges tend to be crushed, and the cut quality tends to degrade significantly.
  • Another problem commonly associated with rotary shear cutting of corrugated board is the generation of dust. Fine paper dust is a very serious problem which may result in clogged filters on air handling systems, hazardous air quality for workers, contamination of electronic and other equipment, and even explosion or fire hazards.
  • U.S. Patent 4,627,214 shows a slitter-scorer apparatus of one prior art construction in which the board is sheared by passage between the overlapping edges of a pair of rotary cutting knives. Even when such cutting knives are properly adjusted and maintained in a sharpened condition, their use to slit heavier double and triple wall board has been less than satisfactory.
  • German Patent DE-A-2225152 which has been taken for the delimitation of claim 1, shows an arrangement which utilizes a saw-edge two-part disposable blade used in conjunction withe a soft-surfaced slotted support roller to achieve slitting. It may be expected however that a sawing acting during slitting will generate dust and heat. Moreover a saw-edge blade cannot readily be sharpened.
  • an apparatus for longitudinally slitting a moving sheet of corrugated paperboard of the type having multiple paper layers secured together by an adhesive, comprising:- an annular rotatable blade mounted so as to be on one side of said paperboard sheet in use with the peripheral cutting edge of said blade extending, in use, beyond the opposite side of said sheet; a rotatable roller means mounted so as to be on said opposite side of said paperboard sheet in use and having a cylindrical outer surface positioned in use to make tangent contact with said opposite side of said sheet; an annular circumferential slot in the outer surface of said roller means, said slot having a width greater than the width of the peripheral edge of said blade and positioned to receive said blade edge therein to form a nip; means for moving the sheet into said nip formed by said blade and said roller means; and means for rotating said blade to move the peripheral edge thereof in the direction of movement of said sheet; said peripheral cutting edge of said blade being a smooth continuous edge defined by similar beveled edge
  • an upper tool head is mounted over the sheet and is laterally translatable across the width of the sheet to position the tool head on the desired cut line.
  • An annular cutting blade is rotatably attached to the tool head such that the peripheral cutting edge of the blade extends downwardly beyond the opposite side of the board sheet.
  • a lower tool head or counterhead is mounted on the underside of the sheet and is also laterally translatable across the width of the sheet on a line parallel to the line of lateral translation of the upper tool head. Roller means are rotatably attached to the counterhead and present a cylindrical outer surface which is positioned to make tangent contact with and support the underside of the sheet.
  • the roller means are provided with an annular circumferential slot in the outer surface, which slot has a width slightly greater than the width of the blade and is positioned to receive the rotating blade edge therein.
  • Drive means are provided to rotate the slitting blade edge in the direction of movement of the sheet and at a speed greater than the speed of the moving sheet.
  • the supporting roller means is formed from a pair of coaxially mounted rollers which are axially spaced such that their adjacent interior faces define the annular circumferential slot for receipt of the sitting blade.
  • the rotational axis of the rollers is preferably offset in the upstream direction, with respect to movement of the sheet, from the rotational axis of the blade.
  • the diameter of the rollers is less than the diameter of the slitting blade and the offset position of the rollers is established such that the line of tangent contact of the rollers with the underside of the sheet defines a line which is normal and tangent to the blade edge where it exits the lower surface of the sheet.
  • the adjacent interior faces of the supporting rollers defining the circumferential slot preferably diverge in a radially inward direction.
  • the adjacent interior faces of the rollers may be recessed to define open interior portions.
  • the rollers are relatively more open in a racially inward direction to provide space for the accumulation of paper scraps, dust and the like.
  • a stripper bar is attached to the roller-supporting counterhead and extends through the circumferential slot to present an edge defining an acute angle with respect to the plane of the sheet and to diverge therefrom in the downstream direction of sheet movement. The combined rotary movement of the blade and rollers tends to cause accumulating paper scrap and the like to move along the stripper bar and out of the slot between the rollers.
  • the lubricant applying means comprises a wick holder which is attached to the upper tool head and presents a pair of spaced generally parallel legs positioned to straddle the cutting edge of the blade.
  • a wick is mounted on the inside of the legs of the wick holder to maintain contact with the blade edge while the blade is rotating and metered amounts of a lubricant are supplied to the wick.
  • the wick holder is pivotally attached to the tool head for movement between the operative lubricating position and an inoperative position spaced radially beyond the blade edge to facilitate blade changing.
  • the slitting apparatus of the preferred embodiment also includes means for sharpening the blade edge on the fly or while the blade is rotating.
  • the sharpening means includes a bracket attached to the upper tool head, a rotary sharpening tool pivotally attached to the bracket for movement between an operative position in contact with the cutting edge of the blade and an inoperative position out of contact therewith, means for moving the tool between its operative and inoperative positions, and means for rotating the tool when it is in its operative position in contact with the blade.
  • the longitudinal slitting apparatus of the preferred embodiment is utilized on a slitting apparatus of the prior art type in which a plurality of slits are provided spaced across the width of a traveling sheet or web.
  • an upper support structure is positioned to overlie the advancing sheet and has an upper guide means defining a linear path across the width of the sheet.
  • a plurality of upper tool heads are mounted on the upper guide means such that each of the upper tool heads may be individually moved along the linear path across the sheet.
  • a blade holder is rotatably attached to each upper tool head and positioned for rotation on a common axis.
  • a drive shaft is positioned on the common axis of the blade holders to simultaneously drive the same and to support the tool holders and upper tool heads for movement along the upper guide means.
  • a thin annular slitting blade is carried on each of the blade holders, each blade presenting a downwardly depending circular cutting edge which extends below the bottom face of the sheet, as previously described.
  • a lower support structure is disposed under the sheet and includes lower guide means defining a lower linear path across the width of the sheet and parallel to the upper linear path.
  • a plurality of lower tool heads are mounted on the lower guide means with each of said lower tool heads individually movable on the guide means along the lower linear path.
  • Roller means are rotatably attached to each of the lower tool heads, in a manner previously described, with the outer surface of the roller positioned to make tangent contact with the underside of the sheet.
  • An annular circumferential slot is provided in the outer surface of the roller means, the slot having a width sufficient to receive therein the portion of the blade edge extending below the sheet.
  • Means are providing for advancing the sheet over the roller means and into the blade cutting edges, for rotating the drive shaft to move the blade cutting edges at a speed greater than the speed of the moving sheet, and for applying a lubricant to the blade cutting edges.
  • each upper tool head includes separate positioning means for moving the tool head along the upper guide means and for carrying therewith its corresponding lower tool head alone the lower guide means.
  • the lower tool head is carried by virtue of contact between the slitting blade and the roller means.
  • each of the roller means may be pivotally attached to a lower tool head on a pivot axis parallel to the axis of rotation of the roller means to increase the amount of the blade edge which is received in the circumferential slot in the roller means.
  • On the fly blade lubrication and sharpening provide, respectively elimination of starch build-up on the blades and the ability to maintain sharp cutting edges for extended periods of operation without shutdown.
  • the main supporting framework for the slitting apparatus includes an horizontal upper beam 10 and a parallel lower beam 11.
  • the beams 10 and 11 extend across the width of the slitting apparatus and are somewhat longer than the maximum width of a continuous moving web or sheet 13 of corrugated paperboard or the like which moves between the beams and the attached components of the slitting apparatus to be hereinafter described.
  • a plurality of upper tool heads 12 are attached to the underside of the upper beam 10 for individual movement across the width of the sheet 13 on a pair of linear ways 14 attached to the beam 10.
  • Each upper tool head 12 has a pair of linear bearing pads 15 attached to its upper edge, which bearing pads connect the tool head to the linear ways 14 for positioning movement to set the tool head in the position where a longitudinal slit in the sheet 13 is desired.
  • a rotary tool holder 16 is attached to each upper tool head 12.
  • the tool holder 16 includes an inner hub 17 which forms the inner race of a rotary bearing 18.
  • the outer race 20 of the rotary bearing 18 is secured in an annular boss 21 in the tool head 12.
  • the inner hub 17 of the tool holder 16 has an axial through bore 22 having a non-circular cross section, such as the hexagonal shape shown.
  • the through bores 22 of the tool holders 16 mounted on the plurality of tool heads 12 lie on a common axis.
  • a drive shaft 23 having a hexagonal cross section is mounted to extend through the bores 22 in each plurality of coaxially mounted tool holders 16.
  • the drive shaft 23 extends across the full width of the apparatus and is connected at one end to suitable drive means, whereby its driving rotation causes tool holders 16 to rotate in bearings 18 with respect to the tool heads 12. Also, the drive shaft 23 provides support for the commonly mounted tool holders 16 and tool heads 12 for movement along the linear ways 14.
  • Each tool holder 16 includes an outer hub 24 to which a thin annular slitting blade 25 is demountably attached, as with a series of machine screws 26 disposed in a circular pattern. The blades 25 depend downwardly from their respective tool heads such that the circular cutting edge extends below the underside 27 of the corrugated paperboard sheet 13.
  • a plurality of lower tool heads 28 are supported for individual sliding movement along a pair of lower linear ways 30 which are, in turn, attached to the upper surface of the lower beam 11.
  • Each lower tool head 28 is supported for movement along the linear ways 30 by a pair of bearing pads 31 similar to the pads 15 on the upper tool heads 12.
  • a pair of identical rollers 32 are coaxially mounted on each lower tool head 28 for rotation on an axis parallel to the axis of the upper drive shaft 23.
  • the rollers 32 are mounted with suitable bearings on a roller shaft 33 which is, in turn, supported in a roller mounting bracket 34.
  • the roller mounting bracket comprises a pair of vertical side plates 35 interconnected at their lower edges by a cross piece 36.
  • Each of the side plates includes an upwardly opening mounting slot 37 in its upper edge for receipt of the roller shaft 33.
  • the roller mounting bracket 34 is adjustably attached to one face of the lower tool head 28 by a pair of locking screws 41.
  • Vertical adjustment of the rollers 32 is provided with a pair of diametrically opposite adjustment slots 39 in the side plate 35 adjacent the roller mounting bracket 34. In this manner, the vertical position of the rollers 32 may be varied at the time of machine set-up to obtain accurate vertical positioning.
  • the roller mounting bracket is locked in position with the locking screws 41 extending through the slots 39 and into suitably tapped holes in the lower tool head 28.
  • the rollers 32 are maintained axially spaced on the roller shaft 33, as by the use of suitable shims, to define therebetween an annular circumferential slot 44 having a width slightly greater than the width of the blade 25.
  • the roller mounting bracket 34 and attached rollers 32 are positioned to make tangent contact with the lower surface of the moving sheet 13 and to allow a portion of the downwardly depending edge of the blade 25 to be received in the circumferential slot 44 between the rollers.
  • the blade 25 is rotated in a clockwise direction as viewed in Fig. 1 and the moving sheet 13 is directed over the rollers 32 and into the nip formed by the rollers and the blade in the direction of rotation thereof, i.e. from right to left as viewed in Fig. 1.
  • the drive shaft 23 is driven at a speed sufficient to impart an edge speed to the blade 25 which is substantially greater than the linear speed of the sheet.
  • the edge speed of the blade may be as much as three times the speed of the sheet or greater.
  • the rollers 32 are preferably substantially smaller in diameter than the blade 25.
  • the rollers may have a diameter in the range of 12.7-17.8 cm (five to seven inches), whereas the maximum diameter of the blade may be as much as approximately 30.5 cm (twelve inches).
  • the axis of the roller shaft 33 is offset horizontally in an upstream direction from the axis of the drive shaft 23 for the blade 25.
  • the rollers 32 are positioned so that the line of tangent contact between the rollers and the underside of the sheet 13 coincides with a line normal to the plane of the blade 25 and tangent to the blade edge. In this manner, the rollers provide adequate support for the sheet against the downward force of the rapidly rotating blade, resulting in the characteristic clean cut.
  • the rollers 32 in one embodiment are machined or otherwise formed from metal with large open annular recesses 53 on either side of a central web 50.
  • the central web 50 interconnects an outer cylindrical rim 51 and an inner hub 52, with the hub supported on bearings 54 for rotation on the roller shaft 33.
  • the circumferential slot 44 between adjacent rollers is defined by the axially adjacent interior faces 45 thereof.
  • the width of the slot 44 is defined by adjacent outer radial edge portions 46 of the cylindrical rims 51.
  • the slot may have a nominal width of approximately 1.14 mm (.045 inch). It is important that the axially adjacent interior faces of the rollers 32 define open interior portions, such as are provided by the annular recesses 53.
  • the roller mounting bracket 34 also supports a stripper bar 42 within the slot 44.
  • the stripper bar is attached at its ends beyond the outer surfaces of the rollers by a pair of mounting pins 43 extending between the side plates 35 of the mounting bracket.
  • the stripper bar extends completely through the slot and has an upper edge disposed at an acute angle with respect to the plane of the sheet and diverges therefrom in the downstream direction.
  • the stripper bar 42 tends to prevent a build-up of accumulated debris in the slot 44. and its inclined angle tends to allow loose material to be swept out of the slot.
  • the central webs 50 of the rollers 32 may be provided with a number of circumferentially spaced openings 55 to allow accumulated debris to be periodically removed from the annular recesses 53.
  • rollers 32 The most severe wear on the rollers 32 occurs at the axially adjacent radial edge portions 46 defining the slot 44. Abrasive wear from even small amounts of board dust and starch from the board adhesive created during slitting causes an eventual rounding of the edge portions 46 and eventually a widening of the slot 44. Should the slot be worn to an excessive width, shims between the bearings 54 may be moved to the axial outer faces of the rollers and the slot 44 returned to its original preferred width. It should also be noted that the construction of the rollers 32 of the Fig. 2 embodiment is such that they are axially symmetrical and may, therefore, be reversed to present new radial edge portions 46.
  • each roller 56 comprises a substantially solid roller body 57, preferably constructed of a tough plastic material such as Nylatron or ultrahigh molecular weight polyethylene.
  • the axial interior faces 58 of the roller bodies 57 are constructed to diverge in a radially inward direction to define a slot 60 having its narrowest width at the outer surface of the rollers 56. This is also to allow loose paper material and the like to move away from the radial outer edge of the slot near the interface with the moving blade 25 and into the more open interior.
  • the mounting assembly and stripper bar utillzed with the alternate rollers 56 is identical to the preferred embodiment utilizing rollers 32.
  • a blade lubricator 61 provides a continuous thin coating of a light lubricant to the blade while the blade is in slitting operation.
  • the blade lubricator 61 includes a generally U-shaped wick holder 62 pivotally attached at its closed end to the upper tool head 12 by a mounting bolt 63.
  • the wick holder has a pair of spaced, generally parallel legs 64 operatively positioned to straddle the cutting edge of the blade 25. A piece of wick material is inserted in the wick holder and secured to the inside faces of the legs 64. With the wick holder disposed in its operative full line position shown in Fig.
  • the wick 65 is in continuous contact with the blade surfaces adjacent the cutting edge.
  • Small metered amounts of a light liquid lubricant such as a thin penetrating oil, are supplied to the wick holder and onto the wick 65 by a positive displacement injector 66 attached to the tool head 12 and receiving lubricant from a common source (not shown). Only very small amounts of lubricant are necessary to coat the blade edge with a thin layer that prevents starch from sticking to the blade, thereby precluding any starch build-up.
  • the positive displacement injector 66 may provide about 0.2 ml (0.2 cc) of lubricant to the wick on times pulses every eight seconds.
  • the amount of starch available to build-up on a blade is greatly dependent on the upstream gluing process and variations in the volume of lubricant supplied and the timing of the injection pulses may be suitably provided.
  • the lubricator 61 is pivotable about the mounting bolt 63 to an inoperative dashed line position shown in Fig. 1 in which the wick holder 62 and attached wick 65 are spaced radially beyond the blade edge.
  • Each of the slitting blades 25, as previously indicated, may have a thickness of approximately .035 inch and is preferably made of a high quality steel.
  • the cutting edge 67 of the blade as shown in the sectional view of the blade in Fig. 7 is provided with a double bevel.
  • the outer bevel at the cutting edge may have, for example, an included angle of 37°.
  • the blade In order to maintain the high quality slit, the blade must not only be kept free from the build-up of starch, but the cutting edge must be maintained in a razor sharp condition.
  • the slitting apparatus includes a blade sharpener 68 adapted to sharpen one face of the outer blade edge bevel while the blade is rotating.
  • the blade sharpener 68 is attached to an angled mounting bracket 70 mounted by its vertical leg 71 to the face of the upper tool head 12 such that the horizontal leg 72 extends over the upper edge of the blade 25.
  • a rotary sharpening tool 73 is attached to the horizontal leg 72 of the mounting bracket and depends downwardly therefrom.
  • the sharpening tool includes a circular sharpening head 74 having a flat outer abrasive face 75.
  • the head is rotatably attached to a small air motor 76 attached to one end of a tool body 77 such that the abrasive face 75 is disposed at the same angle as the adjacent face of the blade edge bevel.
  • the tool body 77 is pivotally attached at its end opposite the air motor to the underside of the horizontal leg 72 of the mounting bracket 70.
  • the end of the tool body 77 is provided with a cylindrical recess 78 providing the outer race for a ball bearing assembly 80, the inner race of which is attached to the end of a stub shaft 80 attached to and extending down from the mounting bracket 70.
  • a torsion spring 82 surrounds the stub shaft 81 with its ends in engagement with the mounting bracket and the tool body 77 to bias the latter to an inoperative position in which the abrasive face 75 is out of engagement with the blade edge.
  • a small single acting air cylinder 83 is attached to the mounting bracket 70 with the rod end 84 of the cylinder in contact with the surface of the tool body 77. When compressed air is supplied to the air cylinder inlet fitting 85 from an external source (not shown), the rod end 84 will be extended and the tool body and attached sharpening head 74 will be rotated about the stub shaft 81, against the bias of the torsion spring 82, until the abrasive face 75 makes light contact with the beveled edge of the blade 25.
  • Air cylinder 83 operates at very low pressure such that the abrasive face 75 makes light surface contact with the blade edge.
  • the air motor 76 which drives the rotary sharpening head 74 is also supplied with compressed air via a fitting 86 to drive the air motor whenever the tool body is rotated into operative sharpening position by activation of the air cylinder 83.
  • the air motor 76 preferably operates at relatively high speed, for example, about 5,000 rpm.
  • the blades 25 are made of a high quality tool steel, it has been found that the blades need only be sharpened a few times per week.
  • the sharpening tool 73 is operated so that the sharpening head 74 applies only a very light force of not more than about three pounds to the face of the bevel. Sharpening contact need be maintained for only a short period of time to remove approximately 0.025-0.050 mm (.001-.002 inch) of material from the blade edge.
  • the blade may be removed from the tool holder 16 and reversed so that the opposite face of the edge bevel may be sharpened to maintain an overall balance in the cutting edge of the blade.
  • the sitting blades of the present invention are tolerant to a substantial reduction in overall blade diameter as a result of sharpening without adversely affecting the quality of the slit. Also, little adjustment, if any, of the blade position is necessary over its useful life.
  • a plurality of upper tool heads 12 and slitting blades 25 are mounted on a common drive shaft 23 for individual movement and selective positioning along the linear ways 14 to provide a plurality of longitudinal slits in the advancing sheet 13 at any selected positions across the width of the sheet.
  • an electric servomotor 87 is mounted on each tool head and drives a pinion gear 88 positioned to engage a linear toothed rack 90 attached to the underside of the upper beam 10, in a manner well known in the art. It is also known to utilize a similar motor-driven rack and pinion assembly to position the lower tool heads 28.
  • both the upper and lower tool heads may be simultaneously moved and repositioned with a single upper servomotor 87 and its related gear 88 and rack 90 in a manner in which the overlapping portion of the cutting blade 25 within the slot 44 between the rollers 32 (or 56) bears on the axial inner face of the roller and carries the roller assembly and lower tool head 28 along with the moving upper head assembly.
  • the blade/roller overlap, the strength of the blade material, or the speed or thrust of the servomotor assembly may be such that the bearing force between the blade edge and the rollers may break or otherwise damage the blade.
  • FIG. 6 there is shown a modified assembly in which the entire roller mounting bracket 34 and attached rollers 32 may be pivoted upwardly so that a much larger portion of the blade edge is received within the slot 44 to enhance the bearing contact surface therebetween and distribute the load imposed by repositioning over a greater portion of the blade edge.
  • Repositioning of the upper and lower tool heads is, of course, undertaken between board runs and, therefore, at a time when there is no sheet present to interfere with the substantial upward movement of the rollers and roller mounting bracket assembly.
  • rollers 32 (or 56) support the advancing sheet at the point where the slitting blade passes through the sheet.
  • Supplemental support of the sheet 13 is also preferably provided just upstream of the rollers and slitting knife by an appropriate sheet supporting surface 91, as shown in Fig. 1.
  • the continuous sheet 13 or web is otherwise driven by appropriate means external of the slitting apparatus, as is also well known in the art.
  • each of the plurality of upper tool, heads 12 mounted on the common drive shaft 23 and linear ways 14 are simultaneously locked in their selected slitting positions with a common lockdown apparatus 92.
  • the lockdown apparatus comprises a long cylindrical cam extending across the full width of the apparatus and supported for rotation on its axis between a locking position with its cylindrical outer surface in locking engagement with a locking pad 94 on each tool head and an unlocked position in which an axial flat surface 95 on the cam 93 is positioned directly adjacent and spaced from the locking pad 94. In the latter position, the tool heads are unlocked for repositioning. Similarly, the plurality of lower tool heads 28 are also locked in operating position with an identical lockdown apparatus 92 including all components identical to those used for the upper locking mechanism.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Making Paper Articles (AREA)
  • Details Of Cutting Devices (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)

Claims (15)

  1. Vorrichtung zum Längsschneiden eines beweglichen Weilpappebogens (13), der mehrere durch einen Klebstoff miteinander verbundene Papierschichten aufweist, mit einem ringförmigen drehbaren Schneidmesser (25), das im Einsatz an einer Seite des Pappbogens (13) angeordnet ist, wobei sich die Umfangsschneidkante (67) des Schneidmessers (25) im Einsatz über die gegenüberliegende Seite des Bogens (13) hinaus erstreckt;
    einer Drehrolleneinrichtung (32; 56), die im Einsatz an der gegenüberliegenden Seite des Pappbogens (13) angeordnet ist und eine zylindrische Außenfläche aufweist, die im Einsatz in tangentialem Kontakt mit der gegenüberliegenden Seite des Bogens (13) steht;
    einem ringförmigen Umfangsschlitz (44) in der Außenfläche der Rolleneinrichtung (32; 56), wobei der Schlitz (44) eine größere Breite als die Umfangsschneidkante (67) des Schneidmessers (25) aufweist und zur Aufnahme der Schneidkante (67) unter Bildung eines Spalts angeordnet ist;
    Mitteln zur Bewegung des Bogens (13) in den durch das Schneidmesser (25) und die Rolleneinrichtung (32; 56) gebildeten Spalt; und
    Mitteln zur Drehung des Schneidmessers (25) zur Bewegung seiner Umfangskante (67) in der Bewegungsrichtung des Bogens (13);
    dadurch gekennzeichnet, daß
    die Umfangsschneidkante (67) des Schneidmessers (25) eine gleichmäßige durchgehende Schneide ist, die durch gleichartig abgeschrägte Schneidflächen auf gegenüberliegenden Seiten des Schneidmessers begrenzt wird;
    die Rolleneinrichtung (32; 56) eine Leitrolleneinrichtung ist und dem Bogen (13) eine feste zylindrische Außenfläche bietet;
    das Schneidmesser (25) zur Bewegung seiner Umfangskante (67) mit einer größeren Geschwindigkeit als der Bogen (13) angetrieben wird; und
    eine Schmiereinrichtung (61) zur Zufuhr eines Schmierstoffs an die Umfangskante (67) des Schneidmessers (25) der Vorrichtung vorgesehen ist.
  2. Vorrichtung nach Anspruch 1, ferner mit:
    einem an einer Seite des Bogens angeordneten und quer über die Breite des Bogens auf einer dazu parallelen Linie verschiebbaren Werkzeugkopf (12), an dem das Schneidmesser (25) drehbar angeordnet ist; und
    einem an der gegenüberliegenden Seite des Bogens angeordneten und quer über die Breite des Bogens auf einer Linie parallel zur Translationslinie des Werkzeugkopfs (12) verschiebbaren Gegenkopf (28), an dem die Rolleneinrichtung (32; 56) drehbar angeordnet ist.
  3. Vorrichtung nach Anspruch 1 zum Schneiden eines durchgehenden, sich bewegenden Wellpappebogens (13) zur Erzeugung mehrerer paralleler, beabstandeter Schnitte, gekennzeichnet durch
    ein oder mehrere weitere ringförmige drehbare Schneidmesser (25), die im Einsatz auf einer Seite des Bogens (13) angeordnet sind, wobei sich deren jeweilige Umfangsschneidkante (67) im Einsatz über die gegenüberliegende Seite des Bogens (13) hinaus erstreckt;
    entsprechend eine oder mehrere weitere Drehrolleinrichtungen (32; 56), die im Einsatz auf der gegenüberliegenden Seite des Bogens (13) angeordnet sind und eine im Einsatz im tangentialen Kontakt mit der gegenüberliegenden Seite des Bogens (13) stehende zylindrische Außenfläche aufweisen;
    einen ringförmigen Umfangsschlitz (44) in der Außenfläche der weiteren Rolleneinrichtung (32; 56), wobei der Schlitz eine größere Breite als die Umfangskante (67) des Schneidmessers (25) aufweist und zur Aufnahme der Schneidkante (67) unter Bildung eines Spalts angeordnet ist;
    Mittel zur Bewegung des Bogens (13) in den durch das Schneidmesser (25) und die Rolleneinrichtung (32; 56) gebildeten Spalt; und
    Mittel zur Drehung des Schneidmessers (25) zur Bewegung seiner Umfangskante (67) in Bewegungsrichtung des Bogens (13);
    wobei die Umfangsschneidkante (67) des oder jedes weiteren Schneidmessers (25) eine gleichmäßige durchgehende Kante ist, die durch in ähnlicher Weise abgeschrägte Schneidflächen an gegenüberliegenden Seiten der Schneide begrenzt wird;
    wobei die oder jede der weiteren Rolleneinrichtungen (32; 56) eine Leitrolleneinrichtung ist und dem Bogen (13) eine feste zylindrische Außenfläche bietet;
    wobei das oder jedes weitere Schneidmesser (25) mit der Geschwindigkeit des zuerst genannten Messers (25) angetrieben wird; und
    wobei das oder jedes weitere Schneidmesser (25) eine Schmiereinrichtung (61) zur Zufuhr eines Schmierstoffs an seine Umfangskante (67) aufweist.
  4. Vorrichtung nach Anspruch 3 zum Längsschneiden eines durchgehenden, bewegten Wellpappebogens (13), der mehrere durch einen Klebstoff miteinander verbundene Papierschichten aufweist, gekennzeichnet durch:
    eine im Einsatz über dem Bogen liegenden oberen Trägerstruktur (10) mit einem oberen Führungsmittel (14), das einen oberen Linearweg über der Breite des Bogens (13) definiert;
    mehrere an dem oberen Führungsmittel (14) angeordnete Werkzeugköpfe (12), die jeweils unabhängig voneinander entlang dem oberen Linearweg beweglich sind;
    einen an jedem Werkzeugkopf (12) drehbar angeordneten Werkzeughalter (16) zur Drehung auf einer gemeinsamen Achse parallel zu dem Führungsmittel (14), wobei jeder Werkzeughalter (16) ein entsprechendes Schneidmesser (25) trägt;
    eine Antriebswelle (23), die auf der gemeinsamen Achse zum gleichzeitigen Antrieb der Werkzeughalter (16) und zur Halterung der Werkzeughalter (16) und der oberen Werkzeugköpfe (12) zur Bewegung entlang dem oberen Führungsmittel (14) angeordnet ist;
    eine im Einsatz unter dem Bogen (13) angeordnete untere Trägerstruktur (11) mit einem unteren Führungsmittel (30), das einen unteren Linearweg parallel zum oberen Linearweg definiert;
    mehrere Gegenköpfe (28), die auf dem unteren Führungsmittel (30) angeordnet sind, wobei jeder der Gegenköpfe (28) unabhängig voneinander entlang dem unteren Linearweg bewegbar ist, und wobei jeder Gegenkopf (28) eine entsprechende Rolleneinrichtung (32; 56) trägt; und
    Mittel für die Drehung der Antriebswelle (23) zum Drehen der Schneidmesser (25).
  5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die oder jede Schmiereinrichtung (61) während der Drehung des Schneidmessers in Betrieb ist.
  6. Vorrichtung nach Anspruch 5, soweit abhängig von Anspruch 2 oder 4, dadurch gekennzeichnet, daß die oder jede Schmiereinrichtung (61) umfaßt:
    einen entsprechenden Dochthalter (62), der an dem oder jedem der Werkzeugköpfe (12) befestigt ist und ein Paar beabstandeter, im allgemeinen paralleler Schenkel (64) aufweist, die in Betrieb zur Überbrückung der Schneidkante (67) des Schneidmessers (25) angeordnet sind;
    einen Docht (65), der an der Innenseite der Schenkel (64) angeordnet ist und in Kontakt mit dem Schneidmesser (25) angrenzend an seine Schneidkante (67) angeordnet ist; und
    Mittel (66) zur Zufuhr einer abgemessenen Menge eines Schmierstoffs zum Docht (65).
  7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß der oder jeder Dochthalter (62) an dem entsprechenden Werkzeugkopf (12) zur Bewegung zwischen seiner funktionellen Schmierstellung und einer radial von der Schneidkante (67) beabstandeten, nicht betriebsbereiten Schneidmesserwechselstellung, gelenkig angeordnet ist.
  8. Vorrichtung nach einem der Ansprüche 1 bis 7, gekennzeichnet durch Mittel (68) zum Schärfen der Schneidkante (67) des oder der Schneidmesser (25) während der Drehung des Schneidmessers.
  9. Vorrichtung nach Anspruch 8, soweit abhängig von Anspruch 2, 4, 6 oder 7, dadurch gekennzeichnet, daß die Schärfmittel umfassen:
    eine entsprechende Stütze (70), die an dem oder jedem Werkzeugkopf (12) befestigt ist;
    ein entsprechendes drehbares Schleifwerkzeug (73), das an der entsprechenden Stütze (70) zur Bewegung zwischen der Betriebsstellung in Kontakt mit dem Schneidkantenbereich des entsprechenden Schneidmessers (25) und einer nicht betriebsbereiten Stellung außer Kontakt damit verschwenkbar ist;
    Mittel (82, 83) zur Bewegung des Werkzeugs (73) zwischen dessen betriebsbereiten und nicht betriebsbereiten Stellung; und
    Mittel (76) zur Drehung des Werkzeugs (73) in der Betiebsstellung.
  10. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Drehachse der Rolleneinrichtung (32; 56) stromaufwärts versetzt ist von der Drehachse des Schneidmessers (25).
  11. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Durchmesser der Rolleneinrichtung (32; 56) geringer als der Durchmesser des Schneidmessers (25) ist, und daß die Linie des Tangentialkontakts der Rolleneinrichtung (32; 56) mit dem Bogen (13) im Betrieb mit einer Linie senkrecht und tangential zu der Schneidkante (67) übereinstimmt.
  12. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die oder jede Rolleneinrichtung (32; 56) zwei koaxial angeordnete Rollen (32; 56) umfaßt, die axial angrenzende Innenflächen (45; 58) mit äußeren Radialkanten aufweisen, die zur Bildung des ringförmigen Umfangsschlitzes (44) beabstandet sind.
  13. Vorrichtung nach Anspruch 12, dadurch gekennzeichnet, daß die angrenzenden Innenflächen (58) der Rollen (56) radial nach innen divergieren.
  14. Vorrichtung nach Anspruch 4, gekennzeichnet durch Positioniermittel, die jeden Werkzeugkopf (12) und die obere Trägerstruktur (10) funktionell verbinden, um den Werkzeugkopf entlang dem oberen Führungsmittel (14) zu bewegen, und um damit dessen entsprechenden Gegenkopf (28) entlang dem unteren Führungsmittel (30) zu führen.
  15. Vorrichtung nach Anspruch 14, gekennzeichnet durch Mittel zur schwenkbaren Halterung jeder Rolleneinrichtung (32; 56) an deren Gegenkopf (28) auf einer Schwenkachse parallel zur Drehachse der Rollereinrichtung zur Veränderung des Bereichs der in dem entsprechenden Schlitz (44) aufgenommenen Schneidkante (67).
EP91906107A 1990-03-08 1991-03-07 Längsschneideeinrichtung für wellpappe u.dgl. Expired - Lifetime EP0505508B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US49079390A 1990-03-08 1990-03-08
US490793 1990-03-08
PCT/US1991/001569 WO1991013733A1 (en) 1990-03-08 1991-03-07 Slitting apparatus for corrugated paperboard and the like

Publications (2)

Publication Number Publication Date
EP0505508A1 EP0505508A1 (de) 1992-09-30
EP0505508B1 true EP0505508B1 (de) 1995-12-06

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EP91906107A Expired - Lifetime EP0505508B1 (de) 1990-03-08 1991-03-07 Längsschneideeinrichtung für wellpappe u.dgl.

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EP (1) EP0505508B1 (de)
JP (1) JPH05506188A (de)
KR (1) KR0169144B1 (de)
AT (1) ATE131100T1 (de)
CA (1) CA2077554C (de)
DE (2) DE9116585U1 (de)
ES (1) ES2083572T3 (de)
WO (1) WO1991013733A1 (de)

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JP3581189B2 (ja) * 1995-04-28 2004-10-27 株式会社イソワ スリッタのシート受け装置
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CN109500666A (zh) * 2018-11-12 2019-03-22 上海交通大学 砂轮架可旋转的精密圆刀数控磨床及磨削方法
KR102246332B1 (ko) * 2020-05-30 2021-05-03 (주)대진코스탈 골판지를 이용한 포장완충재 가공장치
KR102246337B1 (ko) * 2020-08-13 2021-04-30 (주)대진코스탈 피가공 골판지의 크기에 제한이 없이 제조가능한 포장완충재 가공장치
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CN113492433B (zh) * 2021-09-06 2021-11-09 山东鹤鹏技术有限公司 一种具有半自动清洁功能的橡胶加工辊压机

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ATE131100T1 (de) 1995-12-15
CA2077554C (en) 2000-08-08
DE9116585U1 (de) 1993-05-27
DE69115254T2 (de) 1996-07-18
KR0169144B1 (ko) 1999-02-01
EP0505508A1 (de) 1992-09-30
CA2077554A1 (en) 1991-09-09
WO1991013733A1 (en) 1991-09-19
DE69115254D1 (de) 1996-01-18
KR920703275A (ko) 1992-12-17
JPH05506188A (ja) 1993-09-16
ES2083572T3 (es) 1996-04-16

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