EP2851169A1 - Ausstanzmesser, Vorrichtung für die Herstellung des Messers und Herstellungsverfahren - Google Patents

Ausstanzmesser, Vorrichtung für die Herstellung des Messers und Herstellungsverfahren Download PDF

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Publication number
EP2851169A1
EP2851169A1 EP20140177394 EP14177394A EP2851169A1 EP 2851169 A1 EP2851169 A1 EP 2851169A1 EP 20140177394 EP20140177394 EP 20140177394 EP 14177394 A EP14177394 A EP 14177394A EP 2851169 A1 EP2851169 A1 EP 2851169A1
Authority
EP
European Patent Office
Prior art keywords
rule
punching
punch
nick
unit
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.)
Granted
Application number
EP20140177394
Other languages
English (en)
French (fr)
Other versions
EP2851169B1 (de
Inventor
Roberto Spairani
Secondo Spairani
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.)
PRO FORM Srl
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PRO FORM Srl
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Publication date
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Publication of EP2851169A1 publication Critical patent/EP2851169A1/de
Application granted granted Critical
Publication of EP2851169B1 publication Critical patent/EP2851169B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/34—Perforating tools; Die holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • B26F2001/4472—Cutting edge section features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • B26F2001/4481—Cutters therefor; Dies therefor having special lateral or edge outlines or special surface shapes, e.g. apertures

Definitions

  • the present invention relates to the field of the machines for making die cutter rules and, in particular, it relates to a die cutter rule having a new shape.
  • the invention further relates to a die cutter comprising the afore said rule, to a punch-die unit for a machine manufacturing rules of die cutters and, in particular, to a cartridge which can be inserted in the machine which comprises said punch-die unit.
  • the invention relates to a manufacturing method for making die cutter rules.
  • a die cutter employed in die cutting machines comprises a flat or cylindrical support and usually made of multi-layer wood, in which metal rules are mounted and provided with a cutting and/or bending edge; the rules are inserted by interference in corresponding seats obtained in the support and are arranged such to reproduce the shape of a product to be realized by die cutting a paper or cardboard sheet, for example a box.
  • the seats in the support are generally obtained through laser cutting techniques. The insertion of the blades in the corresponding seats is usually carried out manually by an operator, often with the aid of a hammer.
  • the rules are obtained from a metal band which is unwound, punched and/or milled, bent several times to obtain the desired shapes and finally cut to size.
  • the die cutter rule comprises a base, which can be inserted orthogonally into the support in a corresponding seat, and a cutting edge facing the part opposite to the support, i.e. facing the sheet to be die cut.
  • the die cutter support other elements combined with the rules are provided as well, for example elastic elements which facilitate the detachment and splitting of the die cut portion of the sheet from the same die cutter.
  • the rules are mainly subdivided in cutting rules and bending or creasing rules.
  • the rule has a cutting edge, typically having a triangular section, able to cut the sheet when pushed in abutment against the latter during the die cutting.
  • the cutting rules are used, for example, to realize the cutting lines defining the perimetrical development of a box.
  • the bending or creasing rules have an edge shaped to press, without cutting, the sheet against a seat of a counter-die placed at the opposite part with respect to the sheet to be die cut. In this way, a trace is obtained along which the bending of the sheet is easy. It is the case, for example, of the ceasing lines which are on the limb of a box.
  • the company Martin Miller is a manufacturer of die cut rules.
  • nicks in these machines is mainly obtained by punching.
  • Some manufacturers of machines for manufacturing the rules preferred implementing different techniques such as, for example, milling, grinding or electro-erosion of nicks.
  • a machine for making die cutter rules comprising an automatically driven milling tool, is described.
  • the tool actuated by servo-mechanisms, intercepts the rule in a predetermined point and makes the nick on the cutting edge.
  • the recess or the nick has a substantially rectangular profile.
  • the specific punching method is particularly appreciated for the minimum time required to carry out the manufacturing, with respect to the longer times required for the manufacturing carried out by milling, grinding or electro-erosion.
  • the punching does not allow obtaining nicks having small width, since the interaction between the punch and the die is only effective when the amount of material to split is large, i.e. when the nick to be realized is wide (i.e. it has a great longitudinal extent in the direction of the cutting edge of the rule). In other words, the conventional punching technique does not allow making breakings having minimum extent in the cutting edge of the rules.
  • Milling, grinding or electro-erosion allow obtaining nicks having small longitudinal extent, but result in longer times with respect to punching.
  • milling and grinding allow obtaining rectangular nicks only.
  • Another object of the present invention is to provide a die cutter rule comprising one or more nicks improved with respect to conventionally used nicks.
  • the rule has a band shape and comprises a cutting edge extending in a longitudinal direction and a base extending transversely in height.
  • the cutting edge is a taper of the base.
  • the base is intended to be inserted in a corresponding housing seat of a support of a die cutter; the cutting edge is intended to face the part opposite to the die cutter support towards the sheet or panel to be die cut.
  • the rule edge for the die cutting is meant, whether this is an edge shaped for cutting or else shaped for obtaining a creasing line, or yet an edge shaped for making a tear-off line.
  • the cutting edge is broken up next to an at least one recess, or cut-out, or notch, or nick.
  • the nick has a longitudinal extent corresponding to the missing length of the cutting edge and a transversal extent, orthogonal to the longitudinal direction, which affects a portion of the rule base.
  • nick is through-made, i.e. it wholly passes through the rule thickness.
  • the nick has a substantially drop-shaped profile, as the rule is observed laterally, i.e. with the eyes orthogonal to a side of the same rule.
  • a first portion of the nick breaks up the cutting edge with two sides substantially parallel one to another and orthogonal to the longitudinal direction of the same cutting edge.
  • a second portion of the nick, adjacent to the first one, and developing towards the base of the rule, has a circular, or semi-circular, or else elliptical profile, joined to the first portion of the nick and whose perimetrical edge merges to the afore said parallel sides.
  • This particular shape of the nick allows obtaining nicks having very little longitudinal extent on the cutting edge, for the benefit of the torsion stiffness of the rule, in particular at the sharp corners of the cutting edge defined at the nick sides; this aspect allows maximizing the features of structural resistance of the rule and thus the life thereof, exceeding 20000 punches of the respective die cutter.
  • the rule is tapered at the relative cutting edge. Therefore the rule thickness at the base is generally larger than the thickness at the cutting edge. Consequently, the nick according to the present invention has a narrower portion at the cutting edge, where the rule thickness is smaller, and a larger portion (with a circular, or semi-circular, or else elliptical profile) at least at part of the rule base, where the rule thickness is maximum.
  • a punch is provided, according to claim 3, for making nicks having the described features.
  • the punch comprises a body on which a punching portion having a substantially drop-shaped transversal section is obtained.
  • the punching portion is intended for interacting with the rule in progress at first and then with a counter-die located at the opposite part with respect to the rule for shearing a portion corresponding to a nick.
  • the punching portion resists effectively and without deforming against forces risen during the shearing, thereby allowing obtaining very accurate cuts from the dimensional point of view.
  • the punching portion has a thinner part, for example with a thickness on the order of 0.2 mm, adapted to shear the portion having parallel and close edges of the nick through the cutting edge of the rule; the punching portion has a thicker part, that is the circular, or semi-circular or else elliptical part, adapted to shear the thicker part of the nick also through the rule base where shear stresses are larger and the wear the conventional punches undergo is larger.
  • the conventional punches substantially rectangular and free from a tapered portion, are not able to shear nicks having a minimum longitudinal extent.
  • the punch according to the present invention allows obtaining nicks having a minimum longitudinal extent at the cutting edge, of about 0.2 mm, and effectively supporting shear stresses during the shearing that are notably higher than what can be ascertained through the conventional punches.
  • the counter-die has a shape complementary with respect to the punch, so that the punching portion couples to the counter-die when the punching operation of the rule is carried out.
  • the punch and the counter-die form a punching unit object of claim 6.
  • the punch body has a tubular shape developing in height.
  • the tubular portion comprises:
  • This embodiment has constructive advantages in terms of convenience of use and lower wear.
  • it can be obtained an overall manufacturing number greater than that obtained through a single punching tool.
  • the punching portion acting on the rule can be selected. Therefore, the selection of another adjacent one is enough once a punching portion gets worn.
  • the punching portions can work alternatively so that to wear uniformly.
  • the punching portions can have a drop-shaped section but having a different size. This allows selectively choosing the size of the nick to be made. Therefore, through the same punch different typologies of nicks can be made.
  • the counter-die will have to provide different die portions, each having a shape complementary to the used punching portion.
  • the counter-die could provide for a mechanism rotating with respect to its own axis in order to allow the selection and the combining of the corresponding die portion.
  • the punching unit is a removable and interchangeable cartridge to be inserted in a machine for manufacturing die cutter rules.
  • the cartridge is functionally connected to the machine and comprises actuating mechanisms and control units too that drive the punch based on the manufacturing to be carried out on the rule.
  • the manufacturing machine comprises:
  • the method comprises the steps of:
  • a rule 10 is shown as arranged on a supporting plane 102 of a die cutter 100.
  • the die cutter 100 is partially and schematically shown.
  • the rule 10 has a band shape, i.e. it has an elongated shape with small thickness, and comprises a cutting edge 14 developing along a longitudinal direction L and a base 13 extending in height along a transversal direction T.
  • the base 13 is intended to be coupled in a housing seat of the support 102 of the die cutter 100, whereas the cutting edge 14 faces the part opposite to the support 102 towards the not shown sheet or panel to be die cut.
  • At the cutting edge 14 of the rule 10 at least one recess, or cut-out, or notch, hereinafter named ' nick ' 20, is provided, which passes through at least partially the base 13 for a certain depth.
  • ' nick ' 20 By observing the nick 20 laterally from a side 15, 16 of the rule 10, the latter has a substantially drop-shaped profile.
  • the nick 20 comprises a first portion 22 opened on the cutting edge 14 with a substantially rectangular shape.
  • the first portion 22 has two opposing sides 22a substantially parallel one to another.
  • a second portion 24 develops from the first portion 22 as opened on the first portion 22, the latter having a substantially circular shape 24a developing from one of the sides 22a of the first portion 22 until it closes on the opposite side of the same portion.
  • the band-like body 12 of the rule 10 comprises a first 15 and a second 16 sides extending parallel one to another from the base 13 and converging one to another at the cutting edge 14.
  • the nick 20 has the first portion 22 narrower at the cutting edge 14 where the sides 15, 16 converge and the thickness of the band-like body 12 is smaller.
  • the second portion 24 of the nick 20 adjacent to the first portion 22 is partially arranged on the portion of the band-like body 12 having smaller thickness and partially on the base 13 of the same, i.e. the one having larger thickness.
  • the afore described shape allows maximizing the features of wear resistance of the rule.
  • the so-obtained nick has a small longitudinal extent on the order of few tenths of millimeters, this feature can not be obtained through the punching techniques according to the known art.
  • a punch 30 for making the afore described drop-like nick 20 is shown.
  • the punch 30 comprises a supporting body 32 on which at least one punching portion 34 is obtained.
  • the latter if is cut according to a transversal plane P has a substantially drop-shaped section, that is a section complementary to the afore described nick 20.
  • the punching portion 34 comprises a first portion 22' having a rectangular shape which extends from the supporting body 32 and a second portion 24' having a circular shape joined to the first portion 22'.
  • the so shaped punching portion 34 allows obtaining the nick 20 with a small longitudinal extent (direction L) at the cutting edge 14 of the rule and, at the same time, resisting against the forces rising during the punching in the thickest part of the rule. More in detail, the first portion 22' of the punching portion 34, whose section is on the order of few tenths of millimeter, carries out the shearing at the thinnest part of the rule, that is the cutting edge 14.
  • the second portion 24' of the punching portion 34 has a section having larger size and adapted to the stresses to be supported in order to shear part of the cutting edge 14 and especially part of the base 13 of the rule 12 having larger thickness.
  • the body of the punch 30 is a tubular portion 32 developing along an axis Z.
  • the tubular portion 32 comprises in its turn an opening 33 used to insert a driving pin 38 combined with an actuator which pushes the punch 30 along a displacement direction d substantially orthogonal to the rule ( Fig. 3A and 5 ).
  • the tubular portion 32 defines an outer side wall 32' on which several punching portions 34 extending in their turn along the generatrix of the tubular portion parallel to the axis Z, are obtained.
  • the punching portions 34 are substantially shaped as petals on the side wall 32' and are angularly spaced apart one from another by a constant pitch.
  • the so described punch 30 is obtained from a monoblock.
  • the punching portions 34 can be diversified one from another, for example by varying the size or the geometrical features and curvatures of the drop-shaped profile.
  • the punch 30 is combined with a counter-die 40; the rule 10 in progress is arranged between the punch 30 and the counter-die 40 ( Fig. 4 ).
  • the counter-die 40 has a shape complementary with respect to the punch 30. The counter-die 40 substantially avoids the rule 10 from deforming in the area of the cutting edge 14 and causes the sharply and accurately shearing thereof.
  • the punch 30 and the counter-die 40 form a punching unit 50.
  • the punching unit is a cartridge 50 to be interchangeably inserted in a machine 200 for manufacturing die cutter rules, shown in figures 5 and 6 .
  • the cartridge 50 is functionally and interchangeably connected to the machine. Through a gripping portion 56 the cartridge 50 can be replaced or interchanged.
  • the cartridge 50 comprises the actuating mechanisms and a control unit 54 that drive the punch 30 based on the manufacturing to be carried out on the rule 10.
  • the manufacturing machine 200 comprises a feeding unit 210 for feeding a continuous rule, for example a dereeling device.
  • the rule 10 runs along a guided path and passes through the punching unit 50 to make the nicks 20 suitably spaced apart one from another according to a cutting program preloaded on the numerical control unit of the machine.
  • punching cartridges 50 can also be provided and serially arranged one to another ( Fig. 7 ).
  • the machine Downstream of the punching unit 50, the machine provides a bending unit 60 for bending the rule adapted to mold the rule 10 according to a specific shape, if provided in the loaded program.
  • a cutting unit 70 is provided which splits the manufactured length of the rule and allows it dropping into a collecting tank 230, ready to be picked and mounted by an operator on the support 102 of the die cutter 100.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
  • Scissors And Nippers (AREA)
EP14177394.5A 2013-09-19 2014-07-17 Ausstanzmesser, Vorrichtung für die Herstellung des Messers und Herstellungsverfahren Active EP2851169B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000130A ITBS20130130A1 (it) 2013-09-19 2013-09-19 Lama di fustella, macchina di lavorazione di detta lama e corrispondente metodo di lavorazione

Publications (2)

Publication Number Publication Date
EP2851169A1 true EP2851169A1 (de) 2015-03-25
EP2851169B1 EP2851169B1 (de) 2016-03-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP14177394.5A Active EP2851169B1 (de) 2013-09-19 2014-07-17 Ausstanzmesser, Vorrichtung für die Herstellung des Messers und Herstellungsverfahren

Country Status (3)

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EP (1) EP2851169B1 (de)
ES (1) ES2569394T3 (de)
IT (1) ITBS20130130A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700045048A1 (it) * 2017-04-26 2018-10-26 Foppa Fustelle S R L Fustella e metodo per fustellare cartoncino destinato a formare confezioni con apertura a strappo
WO2020035753A1 (en) * 2018-08-13 2020-02-20 Pro Form S.R.L. Method and apparatus for processing cutting-creasing rules of die-cutters
US11478951B2 (en) * 2016-12-21 2022-10-25 Seoul Laser Dieboard System Co., Ltd. Cut-crease rule for dieboard

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1234703A (en) 1969-04-17 1971-06-09 Emmi Koll Improvements in or relating to the production of toothed perforating cutter blades
WO1993011900A1 (en) * 1991-12-11 1993-06-24 Byung Jun Song Cutting apparatus and automatic cutting system of blade's raw material of blanking die
WO1996005951A1 (en) * 1994-08-24 1996-02-29 Schickling Robert A Cutting rule and method of cutting corrugated board
EP0770443A2 (de) * 1995-09-26 1997-05-02 Black & Decker Inc. Kreissägeblatt und Verfahren zu seiner Herstellung
US20020007711A1 (en) * 1997-11-07 2002-01-24 Smith H. Reid Apparatus for variably controlling work feed rate for cutting wood, metal and other materials
US20090199693A1 (en) * 2005-04-20 2009-08-13 Saint-Gobain Abrasives, Inc. Circular Saw Blade With Elliptical Gullets
CN201677406U (zh) * 2010-05-13 2010-12-22 河北小蜜蜂工具集团有限公司 网格状刀头金刚石圆锯片

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1234703A (en) 1969-04-17 1971-06-09 Emmi Koll Improvements in or relating to the production of toothed perforating cutter blades
WO1993011900A1 (en) * 1991-12-11 1993-06-24 Byung Jun Song Cutting apparatus and automatic cutting system of blade's raw material of blanking die
US6324950B1 (en) 1991-12-11 2001-12-04 Byung-Jun Song Cutting apparatus and automatic cutting system of blade's raw material of blanking die
WO1996005951A1 (en) * 1994-08-24 1996-02-29 Schickling Robert A Cutting rule and method of cutting corrugated board
EP0770443A2 (de) * 1995-09-26 1997-05-02 Black & Decker Inc. Kreissägeblatt und Verfahren zu seiner Herstellung
US20020007711A1 (en) * 1997-11-07 2002-01-24 Smith H. Reid Apparatus for variably controlling work feed rate for cutting wood, metal and other materials
US20090199693A1 (en) * 2005-04-20 2009-08-13 Saint-Gobain Abrasives, Inc. Circular Saw Blade With Elliptical Gullets
CN201677406U (zh) * 2010-05-13 2010-12-22 河北小蜜蜂工具集团有限公司 网格状刀头金刚石圆锯片

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11478951B2 (en) * 2016-12-21 2022-10-25 Seoul Laser Dieboard System Co., Ltd. Cut-crease rule for dieboard
IT201700045048A1 (it) * 2017-04-26 2018-10-26 Foppa Fustelle S R L Fustella e metodo per fustellare cartoncino destinato a formare confezioni con apertura a strappo
WO2020035753A1 (en) * 2018-08-13 2020-02-20 Pro Form S.R.L. Method and apparatus for processing cutting-creasing rules of die-cutters
CN112543684A (zh) * 2018-08-13 2021-03-23 专业成型有限公司 用于加工模切机的模切压痕刀的方法和设备

Also Published As

Publication number Publication date
EP2851169B1 (de) 2016-03-23
ES2569394T3 (es) 2016-05-10
ITBS20130130A1 (it) 2015-03-20

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