EP0255626B1 - Paire d'arbres équipés de lames pour le découpage de matériaux en bandes, spécialement du carton ondulé - Google Patents

Paire d'arbres équipés de lames pour le découpage de matériaux en bandes, spécialement du carton ondulé Download PDF

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Publication number
EP0255626B1
EP0255626B1 EP87110187A EP87110187A EP0255626B1 EP 0255626 B1 EP0255626 B1 EP 0255626B1 EP 87110187 A EP87110187 A EP 87110187A EP 87110187 A EP87110187 A EP 87110187A EP 0255626 B1 EP0255626 B1 EP 0255626B1
Authority
EP
European Patent Office
Prior art keywords
knife
cutting
pair
knives
teeth
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.)
Expired - Lifetime
Application number
EP87110187A
Other languages
German (de)
English (en)
Other versions
EP0255626A1 (fr
Inventor
Manfred Schommler
Gerald Martin
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.)
Peters Maschinenfabrik GmbH
Original Assignee
Peters Maschinenfabrik GmbH
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 Peters Maschinenfabrik GmbH filed Critical Peters Maschinenfabrik GmbH
Publication of EP0255626A1 publication Critical patent/EP0255626A1/fr
Application granted granted Critical
Publication of EP0255626B1 publication Critical patent/EP0255626B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B26D1/0006—Cutting members therefor
    • 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
    • B26D1/56—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 travels with the work otherwise than in the direction of the cut, i.e. flying cutter
    • B26D1/62—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 travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is rotating about an axis parallel to the line of cut, e.g. mounted on a rotary cylinder
    • B26D1/626—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 travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is rotating about an axis parallel to the line of cut, e.g. mounted on a rotary cylinder 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
    • 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
    • B26D1/0006—Cutting members therefor
    • B26D2001/0053—Cutting members therefor having a special cutting edge section or blade section
    • 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
    • B26D1/0006—Cutting members therefor
    • B26D2001/006—Cutting members therefor the cutting blade having a special shape, e.g. a special outline, serrations
    • 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
    • B26D1/0006—Cutting members therefor
    • B26D2001/0066—Cutting members therefor having shearing means, e.g. shearing blades, abutting blades
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4766—Orbital motion of cutting blade
    • Y10T83/4795—Rotary tool
    • Y10T83/4824—With means to cause progressive transverse cutting
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4766—Orbital motion of cutting blade
    • Y10T83/4795—Rotary tool
    • Y10T83/483—With cooperating rotary cutter or backup
    • Y10T83/4836—With radial overlap of the cutting members
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9372—Rotatable type
    • Y10T83/9396—Shear type

Definitions

  • the invention relates to a pair of knife shafts for cutting in the transverse direction of web-like material, in particular corrugated cardboard, according to the preamble of claim 1 (US-A 3 638 522).
  • Knife shaft pairs are usually used in cross cutters for corrugated cardboard production plants, in which each shaft pair holds at least one knife with a continuously running cutting edge which is at the same distance from the shaft axis.
  • the knife blade either runs parallel to the shaft axis or it is arranged in a helical shape.
  • the helical arrangement has the advantage that only a short section of the cutting edges engages with one another during the cutting process in a single instant, as a result of which the load on the knives, the knife holder and the shafts is kept low.
  • the cutting edges of the knives describe circles that intersect slightly.
  • the cutting edge of one knife lies in the leading area and the other in the trailing area of the knife blade.
  • the circumferential radius of the cutting edge in the trailing area is chosen to be somewhat larger than the radius of the other cutting knife, so that the cutting edges only touch once during a revolution and after this contact the cutting edges move relatively quickly apart. To ensure a perfect cut, the cutting edges must be biased against each other, i.e. they lie against each other under contact, sometimes with considerable preload.
  • the document US-A 3 638 522 relates to a device for separating foils.
  • the film is simply pulled into the groove, which one edge serves as a continuous cutting edge, without cutting through. This is due to the very high elasticity of many, especially thin films. They can be stretched by a considerable amount, even with a cutting knife, so that cutting does not take place. Therefore, the known device provides a sawtooth edge, but this is designed differently and also works completely differently than in the invention.
  • the back of the teeth is shaped as a cycloid in such a way that the film is held from the tooth tip with the knife back against the edge.
  • the film Before cutting, the film is therefore clamped to the edge and the teeth can now progressively press the film down from above. Since the film can only stretch over a very small area and the knife tips can penetrate the film relatively easily, this is severed by further penetration of the teeth into the groove. As can be seen, a smooth separation process, such as takes place in the device according to the invention and is also necessary for cutting cardboard, does not take place in the known device. Rather, the film is more or less perforated until it tears under increasing tension. Such a separation device is not applicable to corrugated cardboard.
  • the edge of the groove is only used to hold the film in place if the film is only cut by the saw teeth, which cause the cutting process without a counter edge or knife.
  • the teeth extend radially beyond the line of contact of the two knives at an acute angle to the connecting plane between the line of contact and the cutting edge, so that the tooth tip is first buried before the cutting knives come into engagement.
  • the document DE-C 177 078 discloses a serrated circular knife. However, it interacts with a fixed counter plate, namely a table surface which has grooves corresponding to the teeth of the knife. It can easily be seen that there are no points of contact with the separating device according to the invention.
  • the document US-A 4 351 210 discloses a sawtooth knife, as can also be used in the separating device according to the invention. Furthermore, it is stated in this document that a counter tool can be used. Essential to the invention, however, is not just a sawtooth knife, but rather the way in which a circular knife with a straight cutting edge interacts with the sawtooth knife. Such a combination of two different knives of a pair of knife shafts does not result from this document either.
  • the invention is therefore based on the object of providing a pair of knife shafts for cutting web-like material, in particular corrugated cardboard, which enables longer readjustment intervals and a longer service life of the knives. This object is achieved by a pair of knife shafts according to claim 1.
  • sawtooth knives are known per se. They are used, for example, with fly knives. They are also used in so-called short cross-cutters in corrugated cardboard lines.
  • the sawtooth knife sitting on a shaft works in conjunction with a volcanic roller, while moving dig the teeth into the counter roller during the cutting process. Since the short cross cutter involves relatively few cutting operations, they can be used satisfactorily in this case. For cross cutters in which several cutting processes take place per second, the interaction of sawtooth knives with a vulcanizing roller would be unacceptable. The volcanic roller would be destroyed in a very short time.
  • a continuous line of contact between the two knives is maintained during the cutting process.
  • the teeth of the sawtooth edge cause a pre-perforation and thus a better distribution of the cutting forces over the cutting area.
  • This can extend over the entire length of the knife shafts, but preferably, as known per se, a helical arrangement of the knives is selected.
  • the pre-perforation also results in a lower squeezing effect in the horizontal direction, as a result of which the component load is also reduced in the horizontal direction.
  • the position of the teeth overlapping the cutting edge of the counter knife with respect to the counter knife depends on which of the two knives is leading. If the counter knife is leading, the teeth lie on the trailing side of the counter knife. If, on the other hand, the sawtooth knife is leading, the teeth lie on the leading side of the counter knife.
  • FIGS. 1 to 3 A knife blade 10 of conventional cross section is shown in FIGS. 1 to 3, with the exception of a sawtooth-shaped cutting edge 11, by which individual teeth 12 are formed, the shape of which can be seen in FIGS. 2 and 3.
  • the teeth 12 are formed by appropriate grinding from an oblique side of the knife blade, which results in triangular teeth and tooth gaps in side view in the contour.
  • the tooth tips are offset in relation to the right side of the knife blade 10 in FIG. 2, which represents the leading side.
  • the plane in which the teeth extend on this side is inclined by an angle a with respect to the leading side of the knife blade 10.
  • incisions 14 are formed with a triangular cross section.
  • the upper edges of the incisions 14 are formed by straight lines which begin at the tooth tips and converge from there at an acute angle, each between a tooth gap.
  • Knives 20, 21 are attached to knife shafts in a conventional manner.
  • the knives 20, 21 preferably run in a helical shape, so that only a limited length of the cutting edges 22, 23 engages with the corrugated cardboard 24 during the cutting process. This enables the cutting forces to be kept smaller and the wear on the knives to be reduced.
  • the knives 20, 21 are also biased against each other in order to obtain a perfect cutting effect.
  • the knives 20, 21 are provided with open areas 24, 25 in a known manner.
  • the running direction of the corrugated cardboard 24a is from left to right.
  • the lower shaft with the knife 21 rotates clockwise, while the upper shaft rotates counterclockwise.
  • the knives 20, 21 touch the top surfaces of the corrugated cardboard 24a, a leading edge 26 of the knife 21 being pressed somewhat into the bottom top surface.
  • the corrugated sheets are compressed, and all five sheets of corrugated cardboard 24a are more or less pressed against one another without separation. This is finally finished only when the cutting edges 22, 23 lie against one another under pretension, as shown in FIG. 6.
  • FIG. 7 corresponds in time to the arrangement of the knives in the conventional manner according to FIG to have. This is due to the fact that the teeth 12 continue in the direction of the lower one with respect to the line of contact 13 between the upper knife 10 and lower knife 21 Extend knife.
  • the teeth form an acute angle with respect to the connection plane 27 between the contact lines 13, 23, so that the teeth 12 are always on the trailing side of the knife 21 during the cutting process (see also FIG. 8).
  • the teeth 12 or the sawtooth-shaped cutting edge 11 formed by them have largely cut through all the layers of the corrugated cardboard 24a, but the cutting process also first is then ended when the cutting edge 23 abuts against the line of contact 13.
  • the pretension required for this is far lower than in the case of a knife arrangement according to FIGS. 4 to 6. This is based, as already described, on the far lower cutting forces which can be selected on the basis of the sawtooth-like cutting edge 11.
  • the knives 10, 21 can also be attached to the shaft in a helical manner in a conventional manner.
  • the attachment is conventional.
  • the knife 10 has holes 30 at the ends and cutouts 31 on the lower edge for attachment in the knife holder.

Landscapes

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

Claims (4)

1. Paire d'arbres porte-couteaux pour la coupe dans le sens transversal de matériau en bande, notamment en carton ondulé, dont les tranchants (11, 23) des deux couteaux (10, 21) décrivent un cercle pendant le processus de coupe, et dont le tranchant (23) situé du côté avancé ou retardé du premier couteau (21) est constitué sous forme traversante à distance égale de l'axe de l'arbre, le deuxième couteau (10) ayant un tranchant en scie (11) dont les dents (12), en s'éloignant de l'arbre du deuxième couteau (10), s'étendent radialement vers l'extérieur par rapport au tranchant (23) continu du premier couteau (21), caractérisée par le fait que les tranchants (11, 23) desdits couteaux, immédiatement avant la fin du processus de coupe, éventuellement tenus sous pré-tension, ne se touchent que brièvement le long d'une ligne de contact unique (13), et que le tranchant en dents de scie (11), en partant de la ligne de contact (13) par rapport au premier cou-
EP87110187A 1986-08-07 1987-07-15 Paire d'arbres équipés de lames pour le découpage de matériaux en bandes, spécialement du carton ondulé Expired - Lifetime EP0255626B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3626748 1986-08-07
DE19863626748 DE3626748A1 (de) 1986-08-07 1986-08-07 Messerwellenpaar zum schneiden von bahnartigem material, insbesondere wellpappe

Publications (2)

Publication Number Publication Date
EP0255626A1 EP0255626A1 (fr) 1988-02-10
EP0255626B1 true EP0255626B1 (fr) 1990-09-12

Family

ID=6306874

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87110187A Expired - Lifetime EP0255626B1 (fr) 1986-08-07 1987-07-15 Paire d'arbres équipés de lames pour le découpage de matériaux en bandes, spécialement du carton ondulé

Country Status (5)

Country Link
US (1) US4765216A (fr)
EP (1) EP0255626B1 (fr)
JP (1) JPS63174896A (fr)
DE (2) DE3626748A1 (fr)
ES (1) ES2017681B3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2634357B2 (ja) * 1992-07-24 1997-07-23 三菱重工業株式会社 段ボールカットオフ装置
US7143674B2 (en) * 2001-12-28 2006-12-05 Eastman Kodak Company Imaging element having improved crack propagation during conversion
DE102007012160A1 (de) 2007-03-12 2008-09-18 Stipo Jelica Vorrichtung und Verfahren zum Herstellen von Wellpappe sowie die Verwendung der gemäß dem Verfahren hergestellten Wellpappe
CN101314231A (zh) * 2007-06-01 2008-12-03 深圳市燕加隆实业发展有限公司 一种锁扣地板的锁扣加工方法
WO2014119439A1 (fr) * 2013-02-04 2014-08-07 株式会社ＴａｎａーＸ Appareil de fabrication de découpes de carton ondulé, et système automatique d'emballage d'articles comprenant ledit appareil

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE177078C (fr) * 1900-01-01
CH507786A (de) * 1969-05-06 1971-05-31 Sig Schweiz Industrieges Schneidvorrichtung mit rotierendem Zick-Zack-Messer
US3570363A (en) * 1969-12-17 1971-03-16 Wilbur C Thomas Crop shear knife and method of operating same
FR2306773A1 (fr) * 1975-04-07 1976-11-05 Comec Const Meca Creil Cisailles a double rotor
JPS5334673A (en) * 1976-09-13 1978-03-31 Kubota Ltd Blowing unit for reactive fluid in heat treatment reactor
US4351210A (en) * 1978-11-20 1982-09-28 Zimmer Manufacturing Corp. Shear cut tooth
JPS56119311A (en) * 1980-02-20 1981-09-18 Mitsubishi Heavy Ind Ltd Drum shear
JPS5835439Y2 (ja) * 1980-11-04 1983-08-09 博 水野 厚紙シ−ト切断刃
DE3521238A1 (de) * 1985-06-13 1986-12-18 Werner H.K. Peters Maschinenfabrik Gmbh, 2000 Hamburg Querschneidmaschine in einer wellpappenanlage

Also Published As

Publication number Publication date
DE3626748A1 (de) 1988-02-18
JPH0455834B2 (fr) 1992-09-04
US4765216A (en) 1988-08-23
DE3626748C2 (fr) 1989-07-13
EP0255626A1 (fr) 1988-02-10
JPS63174896A (ja) 1988-07-19
ES2017681B3 (es) 1991-03-01
DE3764902D1 (de) 1990-10-18

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