WO2000002715A1 - Unite a pratiquer les fentes a entrainement independant - Google Patents

Unite a pratiquer les fentes a entrainement independant Download PDF

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Publication number
WO2000002715A1
WO2000002715A1 PCT/US1999/015153 US9915153W WO0002715A1 WO 2000002715 A1 WO2000002715 A1 WO 2000002715A1 US 9915153 W US9915153 W US 9915153W WO 0002715 A1 WO0002715 A1 WO 0002715A1
Authority
WO
WIPO (PCT)
Prior art keywords
slotter
male
board
head
conveying path
Prior art date
Application number
PCT/US1999/015153
Other languages
English (en)
Inventor
Gregory J. Newell
Michael C. Mcelligott
Original Assignee
Newell Gregory J
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Newell Gregory J filed Critical Newell Gregory J
Publication of WO2000002715A1 publication Critical patent/WO2000002715A1/fr

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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
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
    • B26D7/2628—Means for adjusting the position of the cutting member
    • B26D7/2642—Means for adjusting the position of the cutting member for slotting cutters
    • 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
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/14—Forming notches in marginal portion of work by cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B31B50/20—Cutting sheets or blanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B31B50/20—Cutting sheets or blanks
    • B31B50/22—Notching; Trimming edges of flaps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/25—Surface scoring
    • B31B50/254—Surface scoring using tools mounted on belts or chains

Definitions

  • the field of the invention is devices used in the rotary slotting, scoring, printing, and die-cutting of corrugated and solid-fiber paper board or other like materials.
  • RSC's Regular Slotted Cartons
  • a typical system could comprise a feeding unit, one or more printing units, and a slotting and scoring unit.
  • a die-cut unit and folding unit with counter- collector could be also be employed.
  • FIG. 1 illustrates the traditional slotting and scoring operation on a sheet of unprocessed board which has been slotted and scored (creased) in four places to produce an RSC.
  • RSC revolutions per minute
  • a scoring operation is preferably used in the preparation of RSC's. Scoring is typically accomplished by the use of one or two sets of vertically opposed scoring shafts to which are fitted upper and lower scoring heads.
  • the heads are located in the same vertical plane such that the upper head directly opposes the lower head.
  • the upper head is fitted with or otherwise has machined into it a particular profile, while the lower head is fitted with or otherwise has machined into it another particular profile such that when a sheet of board is transported horizontally through and between the nip formed between these two profiles, a scoring (or creasing) effect is applied to the board.
  • the scoring heads are required to be moved laterally (i.e., transversely along the shafts on which they reside) for each size of box that is to be produced.
  • the lateral position of the scoring heads defines the location of the scores and therefore the folding line for the panels of the box.
  • the scores produced on the box are lined-up with the slots (in lateral position) to form an RSC.
  • Slotting is also a required operation in the formation of a RSC. Slotting generally refers to the process where either one or two sets of vertically opposed slotter shafts are fitted with upper (usually male) and lower (usually female) slotter heads. The slotter heads are located in the same vertical plane such that the upper head directly opposes the lower head.
  • the upper head is typically fitted with a replaceable male slotter knife, usually consisting of two sections of an otherwise circular cutting blade, the circumference of which is equal to the repeat length of the machine on which the slotting unit is installed and its thickness defining the thickness of the slot that will be removed from the board.
  • the lower head is generally fitted with two female slotter knives, consisting of otherwise fully circular blades, spaced apart marginally wider than the thickness of the male blade that opposes it, and located in a lateral sense on either side of the male blade.
  • the vertical distance between the male and female blades is set such that as board is transported into the nip formed therebetween, the rotating male blade penetrates the board and enters the gap between the two female knives, causing a shearing or cutting effect on either side of the male slotter knife.
  • the leading male knife is generally "tipped” to aid the ejection of the cut slot from the board as the board continues to travel in the direction of the ejected slot scrap.
  • Prior slotting units generally consist of two alternative configurations.
  • the slotter has one set of slotting shafts, with the male slotter head affixed with two slotting blades (the leading knife and the trailing knife as seen in Figures 1 and 2(a)).
  • One blade is fixed in relation to the head, while the other is able to be rotated circumferentially in relation to the first such that the space between the trailing edge of the first and the leading edge of the second defines the depth of an RSC's body.
  • the slotter unit has two sets of slotting shafts, with just one male slotter in each slotter shaft.
  • the advantage of this design is that it is less frequently required for the operator to change blades to achieve different box configurations (e.g., short slots and long body pieces compared with long slots and short body pieces) .
  • the disadvantage is that a second slotting shaft adds considerable additional mass and manufacture cost to a slot- score unit.
  • Printing units may also accompany any slotter and scorer units in the process of RSC's. Printing is not a mandatory operation in the processing of RSC's, but is virtually always included. Generally, the act of printing requires a printing cylinder having a working diameter equal to the repeat length of the machine. To effect printing, a printing plate (also referred to as a printing stereo or printing cliche) is mounted to this cylinder.
  • the printing plate is typically made from a malleable photopolymer material of up to approximately 1/4" in thickness, with raised areas that will pick up ink as it comes into contact with a rotating anilox roll.
  • a rotating anilox roll As the printing cylinder rotates, the ink is transferred from the plate to the board as it passes past and against the printing plate.
  • An impression cylinder presses the board lightly against the printing plate to ensure correct transmission of the required print. All three cylinders (print, anilox and impression) are generally mechanically or electrically coupled to ensure they all have exactly the same circumferential velocity as they make contact with the board that is to be printed on. Die-cutters may also be included in the RSC producing process.
  • Die-cutters generally have two cylinders with working diameters that are generally identical to the repeat length of the machine, with an upper cylinder located directly above a lower cylinder. A pathway between the upper and lower cylinders forms a nip, through which the board that is to be processed (in this case die-cut) travels through.
  • the die-cutting cylinder generally has bolt holes evenly spaced over its outer surface such that a cylindrically shaped cutting and creasing tool can be bolted thereon.
  • the opposing anvil cylinder is generally fitted with a surface to accept the impact of the cutting and creasing tools, often being urethane covered blankets into which the cutting tool can penetrate as it cuts through the board that is transported through the gap between these two rotating cylinders.
  • the repeat length of a machine is a term used to generally describe the circumference of all the major active cylinders that act upon a board as it passes through the various units that process it.
  • the repeat length defines the maximum board depth that can be acted on by any one cylinder before the cylinder has made a complete 360° revolution. Boards longer than the repeat length therefore would undergo a second processing were the board to be any longer than the machine's repeat length.
  • the "maximum board length” is usually a length somewhat shorter than the repeat length. The difference in lengths results from the cycle time required by the feeder to accelerate a sheet of board from its stationary state in the feed unit up to machine speed.
  • Other limitations to the maximum board length can include a locking mechanism required to mount and retain a printing plate on a print cylinder, which reduces its effective diameter. Therefore depending on various factors that will be peculiar to each machine's design and capability, the maximum board depth will typically be about 85% to about 95% of the repeat length for the same machine.
  • skip feed refers to a method commonly used in the corrugated converting industry to process a board that has a length a little beyond a machine's maximum board length. By feeding one board for every two cycles of the machine (instead of one board for every one cycle, as is normal) , a longer board can be fed, printed, slotted, scored and die-cut, provided certain limitations or restrictions are taken into account.
  • Skip feed essentially requires the feeding of boards deliberately out of register or synch with the machine, so that different units of the machine can act on the different portions of the board. The problem of "overrun” is not experienced as this takes place in the spacing between the fed boards that result from feeding one board every two cycles.
  • the unit that limits the maximum board length that can be processed in skip feed operation is often the slotter-scorer unit.
  • the maximum length of board that can be processed into an RSC will be limited according to the circumferential length of the slotting blade or blades.
  • the other limitation in the processing of RSC's occurs with respect to the maximum through-machine length of the board (or box) that can be printed.
  • MP RL - (B - RL) .
  • the application of print every cycle (i.e., every rotation) of the print cylinder means that a larger board to be slotted and scored results in significantly reduced printing capability. Consequently, on large boxes, print of even a small nature will repeat down the length of the box. Previous slotter-scorer units are thus unable to process much larger boards than the circumference of the major cylinders of the machine without repetition of the print application.
  • a slotter unit for slotting a paper board material includes a frame assembly including a conveying path therethrough.
  • a pair of opposing slotter heads for producing leading and trailing slots in the paper board material are rotationally mounted to the frame assembly, one of the opposing slotter heads being rotationally mounted above the conveying path and the other slotter head being rotationally mounted below the conveying path.
  • One of the opposing slotter heads is independently driven of the other such that the rotational speed of the independently driven slotter head is controlled to alter the distance between the leading and trailing slots in the paper board material.
  • the first aspect further includes a pair of opposing yokes adjustably mounted relative to the frame assembly, one of the opposing yokes being above the conveying path and the other yoke being below the conveying path.
  • a pair of male and female opposing slotter heads are rotationally mounted in the opposing yokes, with the male slotter head being above the conveying path and the female slotter head being below the conveying path. The male opposing slotter head is independently driven such that the male slotter head is controlled to alter the distance between the leading and trailing slots in the paper board material.
  • a method of slotting a paper board material with leading and trailing slots comprises the steps of introducing a board into a nip region of a conveying path formed between a male and female slotter.
  • the male slotter is then accelerated to the line speed of the board such that line speed is achieved when the board comes into contact with the male and female slotters.
  • a leading slot is formed in the board with the male and female slotters.
  • the male slotter is then decelerated from line speed to a stationary or near stationary position during which the board advances through the nip without being slotted.
  • the male slotter then re-accelerates to the line speed of the board such that line speed is achieved when the board comes into contact with the male slotter for cutting the trailing slots.
  • a trailing slot is formed in the board with the male and female slotters.
  • the male slotter is rotated in either the clockwise or counter-clockwise direction in preparation of the next board.
  • a method of printing on paper board material contemplates introducing a paper board material into a nip formed in the conveying path of a board between a printing cylinder and an impression cylinder. Ink is transferred from the printing cylinder to the board passing through the nip. Either the printing cylinder or the impression cylinder is disengaged from the board such that the size of the nip is increased so that ink is not transferred to the board.
  • combinations of the foregoing separate aspects are contemplated.
  • an object of the invention is to provide an improved slotter and method of slotting. Other and further objects and advantages will appear hereinafter.
  • FIG. 1 is a perspective view of a slotter-scorer unit according to the prior art.
  • FIG. 2(a) is a side view of a slotter-scorer unit according to the prior art.
  • FIG. 2 (b) is a side view of a slotter-scorer unit according to the prior art.
  • FIG. 3 is a perspective view of one of the opposing yokes with the first pair of creasing heads, slotter heads, and second pair of creasing heads shown.
  • FIG. 4 is a perspective view of a slotter unit illustrating the opposing yoke orientation.
  • FIG. 5 is a further perspective view of a slotter unit illustrating the opposing yoke orientation from above.
  • FIG. 6 is a perspective view of a slotter unit illustrating the frame assembly and drive train of the unit.
  • FIG. 7(a) is a plan view of one of the opposing yokes.
  • FIG. 7(b) is cross-sectional view of the opposing yoke of FIG. 7(a) taken along the line 1-1.
  • FIG. 8(a) is a schematic view of the operation of the slotter unit showing the first and second pair of creasing heads and the slotter heads with the male slotter head in the acceleration zone.
  • FIG. 8 (b) is schematic view of the operation of the slotter unit showing the slotting of the leading slots in a board.
  • FIG. 8(c) is another schematic view of the operation of the slotter unit showing the first and second pair of creasing heads and the slotter heads with the male slotter head in the deceleration zone.
  • FIG. 9(a) is schematic view of the operation of the slotter unit showing the dwell or convey position of the male slotting head.
  • FIG. 9(b) is another schematic view of the operation of the slotter unit.
  • FIG. 9(c) is schematic view of the operation of the slotter unit showing the slotting of the trailing slots in a board.
  • FIG. 10(a) is a schematic view of a printing operation performed on a board with the print cylinder in the disengaged position.
  • FIG. 10(b) is a schematic view of a printing operation performed on a board with the print cylinder in the engaged position.
  • FIG. 10(c) is a schematic view of a printing operation performed on a board with the print cylinder moving to the disengaged position.
  • the present invention is directed to a design and method of operation that provides the capability to process larger sized board materials than would otherwise be possible in current devices, while being itself physically smaller and costing less to manufacture when compared with prior designs.
  • a board 2 passes along a conveying path 4 in the direction of arrow A.
  • a slotting shaft 6 that is positioned perpendicular to the direction of board 2 travel (arrow A) .
  • Located on the slotting shaft 6 is a male slotting head 8.
  • the slotting head 8 has attached thereto two male slotting knives 10.
  • FIG 2(b) there are two male slotting heads 8, with each having one knife 10 thereon.
  • a corresponding female slotting head (not shown) is located below the conveying path 4.
  • one of the knives 10 on the male slotting head 8 is used to create the lead slot 12 while the opposing knife 10 creates the trailing slot 14.
  • a plurality of male slotter heads 8 with associated knives 10 are used to create additional leading and trailing slots 12, 14 on the board 2.
  • a creasing shaft 16 contains a male creasing head 18 having defined shaped or geometry and is located above the conveying path .
  • a corresponding female creasing head (not shown in Figure 1) is located below the conveying path 4. The creasing head 18 impinges on the board 2 passing through the conveying path 4 to form the desired crease.
  • a print cylinder 20 is preferably located below the conveying path 4 of the board 2. To print, the print cylinder 20 having a printing plate 22 thereon comes into contact with the board 2, where ink located on the exterior thereof transfers to the board 2.
  • the present invention is directed to a slotter or slotter unit 30.
  • the slotter unit 30 preferably includes a frames assembly 32 that contain the various working components of the slotter unit 30. Within the frame assembly 32 is a conveying path 4 through which board 2 passes during operation.
  • two side frames 33 and upper and lower cross-ties 35 make up the frame assembly 32.
  • Spanning the side frames 33 of the slotter unit 30 are preferably located a plurality of linear rails 34 that are preferably mounted to the cross-ties 35.
  • Slidably mounted to certain of the plurality of linear rails 34 are a plurality of opposing yokes 36, 37. The plurality of opposing yokes 36, 37 can thus slide laterally along the linear rails 34.
  • the opposing yoke arrangement preferably has one of the opposing yokes 36 located above the conveying path 4 and the other opposing yoke 37 located below the conveying path 4. This arrangement creates the male-female orientation of the slotters and creasers.
  • a plurality of yokes 36, 37 can be slidably attached to the linear rails 34 for the creation of additional slots in the board 2.
  • the yokes 36, 37 preferably have a pair of feet 38 that create a sliding engagement with the linear rails 34.
  • the yokes 36, 37 are thus capable of sliding along the linear rails 34 in a direction perpendicular to conveying path 4 to adjust their position relative to the board 2.
  • the yokes 36, 37 are preferably made of a sturdy material such as cast iron or case steel. Referring now to Figure 3, a first creasing head 40, a male slotter head 46, and a second creasing head 56 are all rotatably mounted to a yoke 36.
  • FIG. 3 Vertically opposing the yoke 36 is an opposing yoke 37 (not shown in Figure 3) that contains a first creasing head 40, a female slotter head 48, and a second creasing head 56 which are all rotatably mounted to a yoke 37.
  • the opposing yokes 36, 37 thus create a pair of first opposing creasing heads 40 rotationally mounted in the opposing yokes 36, 37, a pair of opposing slotter heads 46, 48 rotationally mounted in the opposing yokes 36, 37, and a second pair of opposing creasing heads 56 which are rotationally mounted in the opposing yokes 36, 37.
  • the slotter heads 46, 48, the first pair of creasing heads 40 and the second pair of creasing heads 56 are rotatably mounted to the yokes 36, 37 through the use of bearings 64.
  • the reduced width of the yoke means that the slotter heads 46, 48, can be brought much closer together, particularly when interlaced on a second rail set on each linear rail 34 as can be seen in Figure 4.
  • the design eliminates the conventional slotter shaft 6 rotating support structure. The design supports the slotter heads 46, 48 and creasing heads 40, 56 from yokes directly between lateral supporting cross-ties 35, riding on linear rails 34, thus significantly reducing the inertia of the structure that is to be rotated during operation.
  • the male slotter head 46 resides above the conveying path 4 of the slotter unit 30 in yoke 36 with the female slotter head 48 being below in yoke 37.
  • the male slotter head 46 preferably has teeth 49 located around its circumference. The teeth 49 engage with an intermediary gear 50 located on the yoke 36 for transferring rotation from a primary rotation gear 52.
  • the primary rotation gear 52 preferably is connected to a sliding sleeve 53 which traverses throughout the yoke 36.
  • a rotating shaft 58 passes through the primary rotation gear 52 and is preferably splined or keyed such that it rotates when the sliding sleeve 53 rotates. (See Figures 5 and 6, and 7(a).
  • the rotating shaft 58 and sliding sleeve 53 are rotated by servos 70 mechanically engaged or coupled therewith.
  • the servos 70 are preferably independently driven from the drive train that powers the creasing heads 40, 56 and the female slotter head 48.
  • the rotational power source of the male slotter head 46 is thus independent and separate from the rotational power source of the creasing heads 40, 56 and female slotter head 48.
  • a pair of servos 70 are located on opposing sides of the rotating shaft 58.
  • the servos 70 work in concert with one another to accelerate and/or decelerate the male slotter head 46 to the desired rotational speed.
  • the presence of two servos 70 aids in reducing any adverse torsional forces that can develop in the rotational shaft 58 during operation.
  • a separate means for powering the female slotter 48 and the creasing heads 40, 56 is further included in the slotter unit 30.
  • a separate drive shaft for scoring 42 traverses the unit 30 through the upper yokes 36 to power the creasing heads 40, 56.
  • the drive shaft for scoring 42 is rotatably connected to a gear box 43 preferably located on the exterior of the frame assembly 32.
  • the gear box 43 connects to a drive source to power the creasing heads 40, 56 at or near line speed.
  • the female slotter heads 48 are driven in a similar fashion.
  • the female slotter heads 48 are mechanically connected to a female drive shaft 58 for slotting that traverses the unit 30 through the lower yokes 37 to power the female slotter heads 48.
  • the female drive shaft 58 for slotting is rotatably connected to a gear box 43 preferably located on the exterior of the frame assembly 32.
  • the gear box 43 connects to a drive source to power the female slotter heads 48 at or near line speed.
  • a single male slotting blade 54 is preferably attached to the male slotter head 46.
  • the blade is preferably made of one piece but can be made of two or more individual components.
  • the blade has an arcuate shape, having an angular sweep of about 220° to about 320°.
  • the male blade 54 is used to produce both the leading slots 12 and trailing slots 14 of a board 2.
  • a female slotter head 48 is located vertically opposite the male slotter head 46 below the conveying path 4.
  • the female slotter head 48 is preferably fitted with two female slotter knives 55, spaced marginally wider than the thickness of the opposing male blade 54.
  • a slotting nip 51 is thus formed in the conveying path 4 of the board 2.
  • the slotter unit 30 can contain any number of opposing yokes 36, 37 with slotter heads 46, 48. The number of slotter heads 46, 48 depends on the desired number of slots in the RSC.
  • the male slotting head 46 having the male slotting blade 54 is driven by an independent (from the main power train) servo 70 or other drive means.
  • a separate drive source is preferred as a rapid and accurate acceleration and deceleration of this blade is required to create leading and trailing slots on boards having longer than normal lengths.
  • an additional wheel or drive means can be optionally included that rotates at the line speed and is located above the female slotting knife 55 and preferably to one side of the male slotting blade 54.
  • the purpose of the wheel or drive means is to grip the board in a similar fashion as the creasers so as to permit the board 2 to be securely transported during the manufacture of the body portion of the box's manufacture.
  • the minimum body panel length that could be converted would be the length between the nip of the first creasing head 40 and the second creasing head 56. This feature advantageously reduces the minimum length by about half.
  • an independent servo 70 for the male slotter head 46 rotates the male head 46 with attached blade 54 to an advanced position that permits the same to ramp to line speed. That is, the engagement position of the blade 54 with the board 2 is at a point on the circumference of the male blade 54 equal to the intended leading slot length B, plus the acceleration zone A that is required to accelerate the male head 46 with blade 54 from 0 RPM to line speed.
  • the length of zone A may vary according to the line speed of the machine (i.e., the faster the speed the machine is running at, the more space it requires to accelerate up to machine speed) .
  • the male slotter heads 46 are accelerated so that all male slotters 46 across the unit 30 are rotating at line speed by the time the leading edge of the board 2 reaches the point of engagement (slotting nip 51) of the male slotters 46 and female slotters 48.
  • the cutting of the slot commences and continues at line speed (i.e., the male slotter head 46 is rotating such that the effective circumferential rotation speed of the male blade 54 matches the speed of the board 2) .
  • zone C is shown, which serves a different role compared to zone B in that zone C is for the deceleration of the slotter blade 54 and male head 46 from line speed to either a slowed speed or a stationary speed.
  • the male slotter 46 decelerates to a stationary or near-stationary speed to assume a "dwell" position as can be seen in Figure 9(a).
  • the first and second creasing heads 40, 56, and female slotter heads 48 all continue to rotate at line speed, advancing the board 2 through the slotter nip 51.
  • the male slotter 46 remains in this dwell position to allow the board 2 to travel through the unit 30 without forming the trailing slots.
  • This dwell feature thus permits a theoretically infinitely long body depth.
  • the formation of the trailing slot commences wherein the male slotter head 46 is again accelerated, in this case using a corresponding zone D to accelerate to line speed so that when the male blade 54 pierces the board 2 at the second lateral score-line, it is now traveling at the same speed as the board being processed.
  • the male slotter heads 46 with associated blades 54 continue to rotate at line speed until the end of the board 2 is reached. It is then necessary for the male slotter head 46 to rotate back into the position required for the entry of the next board 2, as recited previously in 8(a).
  • the male slotter head 46 may rotate in machine direction or counter-machine-direction (clockwise or counter-clockwise directions) . Generally, the direction which will bring the male slotter head 46 in the required position the quickest is preferable.
  • the time available to move to this position is defined by the distance between boards 2 divided by the rate at which the boards 2 are being fed per minute. In some cases it may be necessary to reduce the machine running speed or run in skip feed so that sufficient time is available for the male slotter 48 head to be rotated from position seen in Figure 9(c) to the position illustrated in position 8 (a) .
  • the slotter unit 30 as described herein thus can operate without the relatively large shafts that both support and rotationally drive the slotter and creaser heads. This also eliminates the associated hardware such as journal ends, bearing housings and assemblies.
  • a substantial amount of bulk is required in the supporting shafts 6, 16 due to the loads that are imparted at the center of the shafts 6, 16 (midpoint between side-frames) which will tend to deflect the shafts 6, 16. This is particularly true during the slotting and scoring of heavy weight board 2.
  • the wider the unit the more mass that is required, and hence additional structure is needed.
  • the mass of the slotter unit 30 is substantially reduced. However, the rigidity is still achieved by using the cross tie(s) 35 to support the opposing yokes 36, 37 that hold the rotating slotter heads 46, 48 and scoring heads 40.
  • the primary benefit of the present design is that much more function is derived from each circumferential portion of the male slotter head 46 and blade 54 than on a conventional slotter blade/head assembly.
  • a conventional slotter there is generally one knife blade to remove the leading slot 12 and a second knife blade for the trailing slot 14, with the spacing between the blades defining the body depth.
  • the present unit 30 utilizes a servo motor 70 and low inertia design that allows one male knife blade 54 to be rotated rapidly enough to cut both the leading slots 12 and trailing slots 14 while pausing in its "convey" position so that the body length can be any desired length.
  • the secondary benefits of the slotter unit 30 includes the increased flexibility in regard to the maximum and minimum board 2 size that can be processed on any given machine.
  • the elimination of the shafts 6, 16 and other components reduces manufacturing costs in addition to creating an easier installation.
  • the male slotter head 46 with blade 54 is capable of moving into its next order position substantially faster than a conventional slotter.
  • the male slotter blade 54 can rotate radially into the engaged position very quickly due to its low mass and independent (e.g., servo) power source 70.
  • the yokes 36, 37 can preferably be moved laterally in less time without the need for precision movement on the tight tolerance of a slotter shaft 6.
  • a method of interrupting a printing and die-cutting process is described.
  • the present method of printing or die-cutting is contemplated to be used in situations where the board 2 that is to be processed is longer (in machine direction) than the circumference of the print cylinder 80 which carries the printing plate 82.
  • the printing plate 82 is mounted for printing onto the exterior of the print cylinder 80.
  • a die-cut cylinder that carries a cutting tool for cutting into the board 2.
  • the reverse situation may apply in that the portion of a board 2 that would require transformation may be the leading and/or trailing flaps (i.e., the portion of the box other than the body panel) .
  • the concepts as applied and described for printing is identical for die-cutting.
  • the printing cylinder 80 is disengaged such that no print will be applied to the leading portion of the board 2, even though the trailing portion of the printing plate 82 is at the 12 o'clock position and would otherwise be in contact with the board 2 and therefore printing.
  • the print cylinder 80 rotates in the direction of arrow C to a position where the trailing end of the printing plate 82 is at the 12 o'clock position (which coincides with the beginning of the ED zone 84)
  • the ED mechanism commences its cycle, bringing the printing plate 82 up to the engaged position, just prior to the point at which the raised portion of printing plate 82 reaches the 12 o'clock position.
  • the print cylinder 80 then commences printing on the board 2 that is now sandwiched between the print cylinder 80 and the impression cylinder 81.
  • the printing plate 82 is rotated with the print cylinder 80 as close to the same tangential velocity as the board 2 that is passing against it.
  • the ED mechanism commences the return portion of its cycle, pulling the printing cylinder 80 and printing plate 82 down to the disengaged position such that the print cylinder 80 rotates and presents the leading edge of the print plate back 82 to the 12 o'clock position.
  • the printing plate 82 is thus completely disengaged such that no print is applied to the trailing portion of the board 2 passing through.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)

Abstract

L'invention concerne une unité à pratiquer les fentes à entraînement indépendant (30), destinée à pratiquer des fentes dans du carton, cette unité comprenant un ensemble cadre (32) traversé par une trajectoire de transport (4) sur laquelle se déplace le carton (2). La tête à pratiquer les fentes (46), située au-dessus de cette trajectoire de transport (4), est de préférence une tête mâle présentant une lame arrondie (54), destinée à découper des fentes à l'avant et à l'arrière d'un carton (2). Cette tête à pratiquer les fentes mâle (46) est entraînée indépendamment, de sorte qu'elle peut rapidement pivoter, sans dépendre de l'orientation dudit carton. En outre, cette tête mâle est capable de rester en position arrêt pour permettre aux cartons, d'une longueur presque illimitée, d'être rognés au moyen d'une seule lame (54).
PCT/US1999/015153 1998-07-09 1999-07-02 Unite a pratiquer les fentes a entrainement independant WO2000002715A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11297398A 1998-07-09 1998-07-09
US09/112,973 1998-07-09

Publications (1)

Publication Number Publication Date
WO2000002715A1 true WO2000002715A1 (fr) 2000-01-20

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WO (1) WO2000002715A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005000546A1 (fr) * 2003-06-27 2005-01-06 Inter Ikea Systems B.V. Machine de refendage d'ebauches plates d'emballage
ITUD20090132A1 (it) * 2009-07-13 2011-01-14 Panotec Srl Macchina per il taglio e/o la cordonatura di un materiale relativamente rigido, quale ad esempio cartone, gruppo di taglio e/o cordonatura e relativo procedimento di taglio e/o cordonatura
CN109016658A (zh) * 2018-08-28 2018-12-18 扬中市惠丰包装有限公司 一种生产纸箱用压线开糟一体机
CN109807966A (zh) * 2019-03-28 2019-05-28 豪德机械（上海）有限公司 一种防止进料异常的地板背部开槽设备
CN117921097A (zh) * 2024-03-21 2024-04-26 胜利星科检测技术(山东)有限公司 一种油田低效电动机制造电机转子开槽装置

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Publication number Priority date Publication date Assignee Title
US1525238A (en) * 1923-04-23 1925-02-03 Samuel M Langston Co Slotting and scoring device
DE475515C (de) * 1927-09-16 1929-04-26 Cartonnagenindustrie Ag F Umlaufende Laengsschneid-, Schlitz- und Biegemaschine mit scheibenartigen Werkzeugen zur Herstellung von Schachtelzuschnitten, insbesondere aus starker Pappe o. dgl.
US2681105A (en) * 1949-05-06 1954-06-15 Thomas S Fitchett Creasing and slotting machine
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US4098173A (en) * 1977-04-22 1978-07-04 Jamestown Container Corporation Automatic compensating register
GB2072563A (en) * 1980-03-27 1981-10-07 Cavagna E Sheet material processing e.g. cutting or creasing machine
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005000546A1 (fr) * 2003-06-27 2005-01-06 Inter Ikea Systems B.V. Machine de refendage d'ebauches plates d'emballage
JP2007516086A (ja) * 2003-06-27 2007-06-21 インター イケア システムズ ベー ヴィ 平坦包装素材にスリットを形成する装置
AU2004251122B2 (en) * 2003-06-27 2009-07-09 Inter Ikea Systems B.V. Machine for slitting plane packaging blanks
US8061248B2 (en) * 2003-06-27 2011-11-22 Inter Ikea Systems B.V. Machine for slitting plane packaging blanks
KR101117408B1 (ko) * 2003-06-27 2012-02-29 인터 이케아 시스템스 비. 브이. 면형 패키징 블랭크에 슬릿을 성형하는 기계
HRP20051017B1 (hr) * 2003-06-27 2013-02-28 Inter Ikea Systems B.V. Stroj za rezanje ravnih listova za pakiranje
ITUD20090132A1 (it) * 2009-07-13 2011-01-14 Panotec Srl Macchina per il taglio e/o la cordonatura di un materiale relativamente rigido, quale ad esempio cartone, gruppo di taglio e/o cordonatura e relativo procedimento di taglio e/o cordonatura
WO2011007237A1 (fr) * 2009-07-13 2011-01-20 Panotec Srl Machine pour couper et/ou préplisser un matériau relativement rigide, comme, par exemple, du carton, unité de coupe et/ou de préplissage et procédé de coupe et/ou de préplissage associés
US9120284B2 (en) 2009-07-13 2015-09-01 Panotec Srl Machine for cutting and/or pre-creasing a relatively rigid material, such as for example cardboard, a cutting and/or pre-creasing unit and the relative cutting and/or pre-creasing method
CN109016658A (zh) * 2018-08-28 2018-12-18 扬中市惠丰包装有限公司 一种生产纸箱用压线开糟一体机
CN109807966A (zh) * 2019-03-28 2019-05-28 豪德机械（上海）有限公司 一种防止进料异常的地板背部开槽设备
CN117921097A (zh) * 2024-03-21 2024-04-26 胜利星科检测技术(山东)有限公司 一种油田低效电动机制造电机转子开槽装置

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