EP0395816A2 - Outils d'estampage - Google Patents

Outils d'estampage Download PDF

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Publication number
EP0395816A2
EP0395816A2 EP89311566A EP89311566A EP0395816A2 EP 0395816 A2 EP0395816 A2 EP 0395816A2 EP 89311566 A EP89311566 A EP 89311566A EP 89311566 A EP89311566 A EP 89311566A EP 0395816 A2 EP0395816 A2 EP 0395816A2
Authority
EP
European Patent Office
Prior art keywords
die
press
die means
improvement
opposing
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP89311566A
Other languages
German (de)
English (en)
Other versions
EP0395816A3 (fr
Inventor
Joe Treviso
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Amcor Packaging Distribution
Original Assignee
Sunclipse Inc
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 Sunclipse Inc filed Critical Sunclipse Inc
Publication of EP0395816A2 publication Critical patent/EP0395816A2/fr
Publication of EP0395816A3 publication Critical patent/EP0395816A3/fr
Withdrawn legal-status Critical Current

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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
    • B26D7/2614—Means for mounting the cutting member
    • 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
    • B26D2007/2607—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member for mounting die cutters

Definitions

  • the invention relates to an apparatus and method for die cutting in a press and in particular to die cutting cardboard in a clam shell press.
  • Containers and cartons are manufactured by die cutting, sometimes with intricate shapes.
  • sharp metal edges in the form of a die are brought with pressure against a cardboard surface to cut through the cardboard and are then retracted.
  • a substantial amount of pressure must be brought on the die to cut through the cardboard and the knife edge of the die must be forced into the cardboard, which in turn is forced with extreme accuracy through the cardboard against a solid backing plate, typically within a few thousandths of an inch.
  • a "make ready” process must be performed wherein portions of the die knife edges are shimmed by layers of adhesive tape. Cardboard tape of a few thousandths of an inch or metal shims ranging from one to ten thousandths of an inch are placed between selected portions of the die's rear edge and the surface of the press and are used to cleanly force the die into the cardboard.
  • the make-ready process must be practiced to both to set up the die when first cutting and to adjust the die as it wears during a cutting project. If the make ready process is not at first successful, the die must be removed from the press readjusted and again tested until satisfactorily adjusted. This is a process which can be time consuming even for a skilled press operator.
  • the invention is an improvement in a die cutting press for cutting sheet material comprising a die for cutting the sheet material.
  • a first mechanism provides support for the die.
  • a second mechanism is adapted for pressing the sheet material against the die. The sheet material is cut by the die.
  • a clamping mechanism temporarily fixes the die supported by the first mechanism. The clamping mechanism is operable to selectively and quickly release and clamp the die to allow removal, manipulation and insertion of the die onto the first mechanism.
  • the die may be readily manipulated to perfect cutting of the sheet by the die.
  • the clamping mechanism is comprised of a first and second clamping bar and a motive mechanism for simultaneously displacing the first and second bars in opposing directions to selectively bring the first and second bars together or to draw the first and second bars apart.
  • the first and second bars each comprise generally straight cross bars and the first mechanism for providing support for the die is a generally flat surface.
  • the first and second cross bars are displaced by the motive mechanism across the flat surface of the first mechanism.
  • first and second bar are at least partial rings and the first mechanism is a cylinder.
  • the first and second rings are displaced by the motive mechanism along the axial length of the cylinder.
  • the motive mechanism comprises a first and second drive screw.
  • the first and second drive screws are threaded to opposing first and second ends of the first and second cross bars.
  • the drive screw has two threaded portions. The threaded portions of each drive screw have an opposite screw direction so that rotation of the drive screw displaces the cross bars in opposing directions.
  • the motive mechanism further comprises a connection mechanism for connecting the first and second drive screws so that rotation of one drive screw causes rotation of the other drive screw.
  • connection mechanism comprises a sprocket affixed to each drive screw and a chain engaging each sprocket of each drive screw and disposed therebetween so that rotation of one drive screw rotates its corresponding sprocket, displaces the chain and rotates the other sprocket to rotate the other drive screw.
  • the press is a clam shell press; the first mechanism for providing support to the die comprises a stationary frame; and the second mechanism adapted for pressing a sheet against the die comprises a movable bridge.
  • the bridge is adapted for pressing against the frame.
  • the first and second cross bars and motive mechanism for displacing the cross bars are coupled to the frame.
  • the press is a rotary press.
  • the first mechanism for providing support to the die is a cylinder.
  • the rings is disposed on the cylinder and displaced by the motive mechanism along the axis of the cylinder.
  • the second mechanism adapted for pressing the sheet against the die is a pressure cylinder characterized by a conformable portion of its surface. The portion is selectively brought into contact with the sheet when the sheet is disposed in contact with the die.
  • the invention is also a method for adjusting a die within a press for cutting a sheet by the die comprising the steps of disposing the die in the press, and positioning the die in the press by simultaneous movement of two opposing clamping mechanism cutting the sheet by the die.
  • the die is quickly and easily adjusted at the predetermined position within the press.
  • the method further comprises the steps of examining the cut sheet for a satisfactory cut, and releasing the die from the press by moving the two opposing clamping mechanism away from each other.
  • the die is adjusted to improve the cut provided by the die in the sheet.
  • the die is repositioned into the press by simultaneous opposing movement of the two opposing clamping mechanism against the die.
  • the die is accurately repositioned at the predetermined position.
  • the step of positioning the die accurately at the predetermined position comprises the steps of simultaneously driving two straight cross bars toward each other with the die disposed between the cross bars and clamped therebetween thereby limiting further movement of the cross bars and thereby accurately positioning the die in the predetermined position.
  • the step of accurately positioning the die at the predetermined position comprises the steps of simultaneously displacing two rings along the length of a cylindrical press member.
  • the die is disposed between the two rings and is securely clamped by the two rings when the die is accurately positioned at the predetermined position.
  • the step of releasing comprises the steps of simultaneously driving two straight cross bars away from each other and the step of repositioning comprises simultaneously driving again the two straight cross bars toward each other and limiting further movement of the cross bars thereby accurately positioning the die in the predetermined position.
  • the step of releasing comprises the step of simultaneously displacing two rings along the length of a cylindrical press member away from each other
  • the step of repositioning comprises the step of simultaneously again displacing two rings along the length of a cylindrical press member toward each other.
  • the die is disposed between the two rings and is securely clamped by the two rings when the die is accurately positioned at the predetermined position.
  • the invention is still further characterized as an improvement in a clam shell press having a stationary frame for supporting a die member at a predetermined position and a movable bridge for pressing sheet material against the die member causing the die member to cut into the sheet material.
  • the improvement comprises a clamping mechanism for selectively and securely, but temporarily, accurately fixing the die at a predetermined position within the press.
  • a motive mechanism is selectively operates the clamping mechanism to clamp die at the predetermined position or to release the die from the press.
  • the die may be repeatedly fixed and removed from the press for adjustment, refixed, tested and readjusted until a satisfactory cut of the sheet is obtained.
  • An improvement is made to a die cutting press and to the method of die cutting in a press by providing two opposing and oppositely driven clamping bars which move together to clamp the die board and to accurately position the clamped die board at a predetermined location within the press.
  • the press is operated to determine the adequacy of the cut produced by the die in sheet material fed into the press. If the cut is unsatisfactory, the opposing clamp bars are quickly driven apart thereby releasing the die board.
  • the die board can be removed from the press and then manipulated or modified to cure any imperfection in the cut. The modified die board is then reinserted into the press and accurately repositioned at the predetermined location within the press by driving the opposing clamping bars towards each other against the die board.
  • the drive mechanism of the clamping bars insures that when the die board is securely clamped, the die board will always be accurately repositioned in the same press at exactly the location assumed by the die board when it was inserted.
  • the opposing moving clamps automatically move the die board to the predetermined position without the need for measurement, registration or concern for variations in tolerances within a jig.
  • FIG. 1 shows the invention in a first embodiment incorporated within a clam shell die press.
  • a first rigid metal bridge 10 is provided with a facing metal plate 12 which is about one eighth of an inch thick.
  • Bridge 10 may be one or two inches thick.
  • the die board 14 is bolted to a frame 16 which is a similar rigid metal plate of one or two inches in thickness.
  • a cardboard sheet 18, which is to be cut, is placed between bridge 10 and frame 16 and then bridge 10 is driven upward against frame 16 by the mechanism of the press (not shown) to cut the die pattern of die 15 through cardboard 18.
  • die 15 is almost never perfectly leveled and must be adjusted by shims.
  • the shimming process is a process pronounced of the princess and pea under the mattress, the smallest adjustment or misadjustment can often be noticed.
  • a thin piece of cardboard or shim is placed between these plates 10 and 12 underneath that portion of plate 12 which will be proximate to or adjacent to a selected knife-edge portion of die 15. If the shim is in the correct position and has the correct thickness, the cutting action of the die into cardboard sheet 18 will be appropriately adjusted, leaving a clean cut.
  • Die-cut patterns are sometimes exceedingly intricate, e.g., when they include cut-outs, perforations and curvilinear edges.
  • the position of the shim between facing plate 12 and bridge 10 must be measured or positioned rather painstakingly in order to place it under the appropriate portion knife-edge of die 15 which is bolted to frame 16 when the press closes.
  • die board 14 When die board 14 is removed from the press after a portion of the job is run and then reinserted to finish the job, it must be repositioned on frame 16 and the position of shims underneath plate 12 remeasured with respect to the assumed, predetermined position of die 15 on frame 16. Die board 14 once attached then detached and reattached almost never ends up exactly in its original position with respect to shims which have been removed along with die board 14 in any case. The normal tolerances in the threading or bolt which attaches die board 14 to frame 16 are typically sufficient to render any prior adjustment suspect or even useless.
  • Threaded rods 20 are provided on each side of frame 16 with rigid cross beams 22 and 24 driven by rods 20 toward and away from a predetermined position on frame 16, usually the center of frame 16.
  • a hand wheel 26 is used to rotate the right rod as seen in the Figures.
  • the left rod 20 may also be provided with a handwheel and it must understood that nonmanual automated means of any type may be substituted for the hand wheel if desired.
  • the right rod 20 as seen in Figure 2 is connected through a sprocket 28 and chain 30 to a matching sprocket used to turn the left rod 20.
  • cross bars 22 and 24 are either simultaneously both moved away from the predetermined fixation point of die board 14 in frame 16 or towards the predetermined fixation point.
  • the predetermined fixation point is at or near the center of the press or at least frame 16 since clamshell presses usually apply the most even pressure over die 15 if die board 14 is placed in the center of the press.
  • die board 14 can be removed or inserted within frame 16 in three seconds or or less and a shim placed behind die board 14 between the die and frame 16. This has the same effect as shims laid underneath plate 12 and will raise any selected portion of the die knife edge.
  • a pressing can be made and the cut cardboard examined to determine whether other adjustments are needed. Three seconds are required to release the die, and the shims are applied directly to the back of the die according to the cut pattern in the cardboard.
  • Sprockets 28 and chain drive 30 are concealed from view in Figures 1 and 2 by means of casing 32 disposed horizontally across the top of frame 16.
  • the drive screw is journalled in casing 32 and fixed to sprocket 28.
  • Rotation of hand wheel 26 rotates sprocket 28 and displaces chain 30, thereby rotating the opposite or left drive rod 20 as seen in the Figures.
  • Each drive rod 20 continues downwardly from casing 32 and is threaded into block 33.
  • Block 33 in turn is connected or bolted in Figure 3 to cross bar 22.
  • each drive rod 20 continues downwardly to a similar block 33 into which is it is threaded.
  • Lower blocks 33 are also bolted or connected to the lower cross bar 24.
  • Die board 14, carrying the cutting die 15, is then easily clamped and centered on frame 16 by cross bars 22 and 24.
  • the left hand screw drive 20 as seen in Figure 2 is provided with an upper threaded portion or half 23a and a lower threaded portion or half 23b. Clockwise rotation of the right screw drive 20 in Figure 2 will similarly be translated through chain 30 in casing 32 to cause a clockwise rotation of the left side screw drive 20 in Figure 2.
  • threaded portion 23a is a left hand screw cut while threaded portion 23b is a right hand screw cut therefore driving each end of cross bars 22 and 24 simultaneously and uniformly in the same direction. This allows for even pressure to be applied by cross bars 22 and 24 against the upper and lower edges of die board 14 in Figure 1.
  • Figures 4 and 5 show a press which is a rotary press.
  • the same concept of Figures 1-3 can be applied according to the teachings of the invention to a rotary die cutter.
  • the die boards are cylindrical and instead of being bolted to the roller as in the prior art, the die board is clamped into the press by two slidable rings 36, one of which is shown in Figure 4 and both of which are visible in the perspective view of Figure 5.
  • Rings 36 are driven by longitudinal screw rods 38 which are ganged together by chains and sprockets, or beveled gears and shafts as desired.
  • Such screw rods 38 would be driven appropriately through a pneumatic air ratcheting mechanism 46 attached to the driving chain or driveshaft coupled to screw rods 38.
  • die board 14′ on rotor 34 is pressed against a pinch roller 40 about which is wrapped a tough urethane blanket 42.
  • a cardboard sheet 44 to be cut is inserted therebetween.
  • a few thousandths of an inch shimming is necessary to make ready die board 14′.
  • the shimming is inserted at the back of die board 14′ between die board 14′ and roller 34 instead of under polyurethane blanket 42 and die board 14′ is quickly positioned and repositioned by clamping rather than by bolting or other type of affixation to roller 34.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
EP19890311566 1989-05-02 1989-11-08 Outils d'estampage Withdrawn EP0395816A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US34640689A 1989-05-02 1989-05-02
US346406 1989-05-02

Publications (2)

Publication Number Publication Date
EP0395816A2 true EP0395816A2 (fr) 1990-11-07
EP0395816A3 EP0395816A3 (fr) 1991-10-02

Family

ID=23359236

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890311566 Withdrawn EP0395816A3 (fr) 1989-05-02 1989-11-08 Outils d'estampage

Country Status (4)

Country Link
EP (1) EP0395816A3 (fr)
JP (1) JPH02303799A (fr)
AU (1) AU4475689A (fr)
CA (1) CA2008471A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0487983A1 (fr) * 1990-11-28 1992-06-03 DRÖSSERT MASCHINENBAU GmbH Châssis
DE19516074B4 (de) * 1995-05-04 2005-12-22 Heidelberger Druckmaschinen Ag Vorrichtung zum Stanzen

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK174943B1 (da) * 2002-02-13 2004-03-15 Inter Ikea Sys Bv Maskine til udstansning af emner fra en bane af bølgepap samt til dannelse af bukkeanvisningslinier i emnerne
JP2009166220A (ja) * 2008-01-21 2009-07-30 Takahashi Keisei:Kk 型抜きプレス装置および型抜きプレス装置の平行度測定システム
JP5355633B2 (ja) * 2011-07-11 2013-11-27 大創株式会社 打抜き加工用受け板
WO2017100527A2 (fr) * 2015-12-09 2017-06-15 Phoenix Partners, Llc Appareil et procédé de découpage à l'emporte-pièce

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE350957C (de) * 1920-01-07 1922-03-29 Stokes & Smith Company Maschine zum Einkerben und Ausstanzen von Arbeitsstuecken zur Herstellung von Pappschachteln
GB629451A (en) * 1947-10-11 1949-09-20 Samuel Francis Mcgrath Improvements in or relating to holders for type and the like
US3079846A (en) * 1961-06-30 1963-03-05 Box O Matic Machine Inc Method and apparatus for scoring and slotting carton blanks
US3589230A (en) * 1969-06-04 1971-06-29 Dovey Mfg Co Adjustable clamp for knives
FR2151854A5 (fr) * 1971-08-02 1973-04-20 Hickman Ronald

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE350957C (de) * 1920-01-07 1922-03-29 Stokes & Smith Company Maschine zum Einkerben und Ausstanzen von Arbeitsstuecken zur Herstellung von Pappschachteln
GB629451A (en) * 1947-10-11 1949-09-20 Samuel Francis Mcgrath Improvements in or relating to holders for type and the like
US3079846A (en) * 1961-06-30 1963-03-05 Box O Matic Machine Inc Method and apparatus for scoring and slotting carton blanks
US3589230A (en) * 1969-06-04 1971-06-29 Dovey Mfg Co Adjustable clamp for knives
FR2151854A5 (fr) * 1971-08-02 1973-04-20 Hickman Ronald

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0487983A1 (fr) * 1990-11-28 1992-06-03 DRÖSSERT MASCHINENBAU GmbH Châssis
DE19516074B4 (de) * 1995-05-04 2005-12-22 Heidelberger Druckmaschinen Ag Vorrichtung zum Stanzen

Also Published As

Publication number Publication date
JPH02303799A (ja) 1990-12-17
CA2008471A1 (fr) 1990-11-02
EP0395816A3 (fr) 1991-10-02
AU4475689A (en) 1990-11-08

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