WO1998033630A1 - Method and device for cutting continuously delivered flat objects - Google Patents
Method and device for cutting continuously delivered flat objects Download PDFInfo
- Publication number
- WO1998033630A1 WO1998033630A1 PCT/CH1998/000031 CH9800031W WO9833630A1 WO 1998033630 A1 WO1998033630 A1 WO 1998033630A1 CH 9800031 W CH9800031 W CH 9800031W WO 9833630 A1 WO9833630 A1 WO 9833630A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cutting
- cutting edge
- speed
- objects
- cut
- Prior art date
Links
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
- B26D11/00—Combinations of several similar cutting apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
- B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
- B26D1/25—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member
- B26D1/26—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis substantially perpendicular to the line of cut
- B26D1/28—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis substantially perpendicular to the line of cut and rotating continuously in one direction during cutting
Definitions
- the invention relates to a method according to the preamble of the first independent claim.
- the method is used to cut flat objects that are conveyed continuously and parallel to their main surfaces along predetermined cutting lines that run parallel to the conveying direction.
- the method is particularly suitable for cutting flat objects that are difficult to cut because, for example, they are easily deformable and / or consist of several layers, which are also easily deformable, and which layers adhere to one another only slightly.
- Such articles are, for example, multi-page printed products made of relatively thin papers.
- the invention further relates to a device according to the preamble of the corresponding claim for performing the method.
- For cutting or trimming flat objects usually perpendicular to their main surfaces, they are positioned, for example, between two straight cutting edges and the cutting edges cross each other in a plane perpendicular to the main surfaces. passed that the intersection of the two cutting edges, in which cutting is effective, moves along a predetermined cutting line over a main surface of the object to be cut.
- the one of the cutting edges can lie in the support plane of the object to be cut or can be part of a support surface.
- the other cutting edge can be moved against this support plane, either by pivoting about a pivot axis or by a movement perpendicular to the support plane, the cutting edge moving against the support plane being oriented obliquely with respect to the support plane (cutting angle).
- Such cutting methods are referred to as cross cutting and are best known as shear cutting of stationary objects.
- Devices for intersecting cutting of flat objects continuously conveyed transversely to their main surfaces are known, for example, from publication EP-367715 (F271), devices for cutting objects continuously conveyed parallel to their main surfaces, for example from publication US-3069952 or from publication EP - 0698451. If the specified cutting lines lie parallel to the main surfaces of the objects to be cut when conveying, the arrangement of the two cutting edges must be aligned transversely to the conveying direction. Since a finite period of time is necessary for the cutting process, it is also obvious for such a cut that, for a high cutting accuracy, the cutting device must be moved with the object to be cut at least during the cutting process.
- the object of the invention is to demonstrate a method with which flat objects conveyed continuously, at a constant conveying speed and essentially parallel to their main surfaces, are cut between two cutting edges along predetermined cutting lines which are aligned parallel to the conveying direction, whereby a first of the cutting edges lies in the support or conveying plane of an object to be cut and the second cutting edge is moved past the first cutting edge for the cutting process and advantageously intersects with it.
- adequate or very high cutting qualities are to be achieved by appropriate guidance of at least the second cutting edge even at low contact pressures.
- the invention is based on the knowledge that printed products which consist of several pages can then be cut with a sufficient to very good cut quality with a low pressing pressure or even without being pressed onto a support surface, if at any moment the
- Cutting process at least that point of the second cutting edge, which is involved in the cutting process (intersection with the first cutting edge or cutting point), has a relative speed to the object to be cut, which is as accurate as possible perpendicular to
- Support plane or to the first cutting edge or to the main surfaces of the object to be cut is directed. This means that it is sufficient if only this cutting point on the second cutting edge has an absolute speed, the component of which in the conveying direction is as exactly as possible as large as the conveying speed.
- At least the second cutting edge which is moved against the support plane, is adjusted to the continuous conveyance of the objects to be cut in such a way that it moves
- At any time during the cutting process at least the cutting point of this cutting edge has a speed whose component in the conveying direction is the same size as the constant conveying speed.
- the holding means have the function of holding the products in such a way that they rest on the first cutting edge and advantageously on a support surface containing the first cutting edge.
- Such a movement of the second cutting edge can be realized most simply by moving it, crossing the first cutting edge, past the first cutting edge at a constant pivoting speed around a stationary pivot axis arranged above the support plane, the pivot axis being perpendicular to that plane, in the two cutting edges are arranged.
- the above condition can be met by appropriately matching the distance of the swivel axis from the support plane and / or the swivel speed to the conveying speed.
- the cutting speed that is, the The speed at which the cutting point moves on the main surface of the object to be cut depends on the swiveling speed and on the position of the swiveled, second cutting edge relative to the swiveling axis. This location can be freely selected within wide limits.
- the device according to the invention for executing the variant of the method according to the invention described above essentially consists of a pair of blades oriented in the conveying direction, each with an essentially straight cutting edge.
- the first cutting edge is arranged in the support plane of the object to be cut, the second cutting edge can be pivoted about a pivot axis lying above the support plane.
- the second cutting edge lies in a plane that is aligned perpendicular to the pivot axis.
- a plurality of the pivotable blades with second cutting edges are arranged in a star shape on a uniformly rotating carrier.
- Further process variants consist in that the second cutting edge for the cutting process is moved past the first cutting edge in a direction of movement perpendicular to the support plane or in a pivoting movement about a pivot axis lying in the support plane and that it is at the same time at a constant speed which is equal to the conveying speed , is moved in the conveying direction.
- the cutting point on the second cutting edge (effectively the entire cutting edge) has a relative speed with respect to the object to be cut at any time during the cutting process, which is aligned exactly perpendicular to the support plane. It turns out that in many applications it is sufficient for the first cutting edge arranged in the support plane of the objects to be cut if it is stationary. However, this cutting edge can also be moved in such a way that the relative speed in the conveying direction between the first cutting edge and the object to be cut is minimized.
- Figure 1 shows the principle of a preferred variant of the inventive method
- Figures 2 to 5 further representations like Figure 1 with varying cutting angle
- FIGS. 6 and 7 show two exemplary embodiments of the device according to the invention with rotating second cutting edges
- FIG. 8 shows an exemplary embodiment for the co-movement of the first cutting edge
- FIG. 9 shows an arrangement with three devices according to the invention for three-sided trimming of booklet-shaped printed products
- FIG. 10 shows a further arrangement for three-sided trimming of booklet-shaped printed products.
- FIG. 1 shows a simple diagram which can be used to explain a preferred embodiment of the method according to the invention.
- the figure shows a line with arrow F as the conveying direction of the objects to be cut, one of which is shown and labeled G.
- Line F simultaneously represents a section through the support or conveying plane for objects G to be cut and a first cutting edge SKj aligned in this supporting plane and parallel to the conveying direction.
- the figure also shows a second cutting edge SK 2 , which is around a stationary one Pivot axis M can be pivoted with respect to the first cutting edge SK j in a plane perpendicular to the pivot axis M and with a constant pivot speed ⁇ .
- the second cutting edge SK 2 is crossed with the first cutting edge, that is to say in cutting engagement.
- the point S j of the cutting edge SK 2 is first in cutting engagement with the first cutting edge SK 1; that is, S x is the cutting point. Then the cutting point moves to the left on both cutting edges.
- the cutting engagement ends at position SK 2 'of the second cutting edge when point S 2 (position S 2 ') forms the cutting point of the second cutting edge.
- the speed component v F in the conveying direction is therefore independent of the radius with which the cutting point moves around the swivel axis, i.e. it is constant at constant ⁇ during the entire cutting process and always the same as the tangential speed of a point that is at a radius with the angular speed ⁇ y rotates around M.
- the cutting edge SK 2 must be returned from its swivel position after cutting (SK 2 ') to the starting position (SK 2 ). This can be achieved either by swiveling in the opposite direction to swiveling for the cutting process or by rotating about the swiveling axis M in the same direction as the swiveling for the cutting process. Since the above explanations show that the swiveling speed ⁇ must be constant for the cutting process, the rotation variant is more advantageous, since a constant angular speed can be realized more easily for a rotation than for a cyclical swiveling back and forth.
- a cutting process according to FIG. 1 begins at the leading edge of the object G in the conveying direction and ends at its trailing edge.
- an object G can be completely cut in a single cutting process if its extent in the conveying direction is not greater than the distance between the points S, and S 2 'plus the distance that it is moved forward during the cutting process.
- the second cutting edge is advantageously designed in such a way that its start and end areas are not used for cutting an object, that is to say that the path S 1 -S 2 'is advantageously designed in such a way that it is rather greater than the extent in the conveying direction of the object to be cut.
- FIG. 1 It can also be seen from FIG. 1 that the cutting angle (angle between the two cutting edges involved in the cutting process) decreases during the cutting process, the cutting speed decreasing with increasing initial cutting angle ⁇ . From the above derivation it can be seen that the cutting angle ⁇ has no influence on the speed component v F , that is to say that it can be freely selected, as required by the task.
- FIGS. 2 to 5 In which arrangements are shown which correspond to the arrangement according to FIG. 1 except for the initial cutting angle (ß.l to ß.4).
- the pivot position of the second cutting edge SK 2 at the beginning of the cutting process and SK 2 'at the end of the cutting process is again shown in each of FIGS. 2 to 5.
- Figure 2 shows a larger initial cutting angle ß.l than the initial cutting angle ß of Figure 1. Since the initial cutting angle ß.l opens as in Figure 1 away from the pivot axis, the object G as in Figure 1 from the leading edge cut here. Since the angle ß.l is greater than ß ( Figure 1), the cutting speed is lower.
- Figure 3 shows an initial cutting angle ß.2, which opens against the pivot axis M, whereby the cutting process begins at the trailing edge of the object G to be cut.
- the speed ratios are the same as in FIGS. 1 and 2.
- Figure 4 shows a special case, a second cutting edge SK 2 , which is arranged radially relative to the pivot axis M.
- the initial cutting angle ß.3 is also open in such a case against the pivot axis M (cutting process begins at the trailing edge of the object G) and is equal to the angle whose sine y / r is 2 .
- the time span that is necessary for such a cut is theoretically zero and practically only dependent on the thickness (extension in the direction y) of the object G.
- the condition of Limitation of the relative speed to a component perpendicular to the main surfaces of an object G to be cut can be fulfilled.
- FIG. 6 shows an exemplary embodiment of the device according to the invention with a carrier 10, on which a plurality of blades 11 with second cutting edges SK 2 are arranged in a star shape and which is one by a distance y above the support plane of the objects G to be cut or above the first Cutting edge SK ⁇ arranged pivot axis M and is driven to rotate at a constant angular velocity ⁇ .
- the blades 11 are to be arranged such that the distance SS 2 'is at least as large as 1 minus the distance by the one Object is transported forward during a cutting process (at least as large as 1 for short cutting times). If n (for example three) second cutting edges are provided, the corresponding blades are each offset by 360 ° / n (for example 120 °) in order to arrange the center of the carrier 10.
- the rotational speed ⁇ of the carrier must be set up in such a way that, during the same period in which the carrier rotates through 360 ° / n (for example 120 °), the objects move a distance d be moved forward. It follows for ⁇ and for y:
- FIG. 7 shows very schematically an exemplary embodiment of the device according to the invention with a rotating carrier 10 on which six blades 11 with second cutting edges SK 2 are arranged in a star shape such that the objects G fed in the conveying direction F are cut from their trailing edge, as has already been described in connection with FIGS. 3 and 4.
- FIGS. 6 and 7 show star-shaped carriers with three or six blades 11 with second cutting edges SK 2 .
- the number of blades 11 is to be matched to the blade arrangement (cutting angle) and to an easily realizable range of the rotational speed.
- FIG. 8 shows two embodiments of devices according to the invention which are designed in this way.
- FIG. 8 shows a conveying direction for objects G to be cut, again represented by an arrow F.
- the cutting area is shown schematically by the pivot axis M and by a pivotable, second cutting edge SK.
- the arrow F represents, for example, a pair of conveyor belts which are arranged in parallel and at a distance from one another and which are driven synchronously.
- Brake cams 15 are moved between the conveyor belts represented by arrow F.
- These brake cams 15 are arranged, for example, on an endless chain 17 running over two deflection wheels 16 and are moved such that they protrude above the support plane of the objects in the cutting area and move slightly more slowly in the conveying direction than the pair of conveyor belts.
- the objects fed on the conveyor belts are lightly braked before they reach the cutting area and precisely timed for the cutting process. During the cutting process, they guide the objects to be cut.
- a plurality of blades 18 with first cutting edges SK j can now also be arranged on the same chain 17.
- These blades are, for example, pivotably arranged on the chain and spaced from the brake cams in such a way that they can be positioned in the cutting area outside the conveyor belts.
- the blades 18 With a moving link 19, the blades 18 are guided at least in the cutting area such that the first cutting edges SK ⁇ are positioned in the support plane of the objects to be cut.
- first cutting edges SKj have the same speed in the conveying direction as the brake cams, that is also the same speed as the objects to be cut.
- acceleration cams acting on the trailing edges can also be provided in an analogous manner and with the same function.
- an entire cutting device in the sense of a pair of scissors, which has a first and a second Has cutting edge on two blades pivotable relative to one another about a swivel axis, with which objects to be cut are carried along. So that the condition of the relative speed of the second cutting edge, which is to be limited to a component perpendicular to the support plane, is fulfilled in such a case, the pivot axis must be arranged in the support plane.
- FIG. 9 shows a bird's eye view of an arrangement with three devices 30.1 to 30.3 according to the invention for the three-sided trimming of printed products P with, for example, a bound, stapled or glued back R.
- the printed products are successively in a first conveying direction Fl parallel to their back R promoted and trimmed using the first cutting device 30.1 on its front edge opposite the back R.
- the printed products are deflected in a manner known per se, without changing their spatial position, in such a way that they are conveyed further in a second conveying direction F.2 transversely to their back R.
- the foot and head edges of the printed products are simultaneously cut by cutting devices 30.2 and 30.3 arranged opposite one another.
- FIG. 10 shows a schematic, three-dimensional representation of a further arrangement in which booklet-like products P with a spine R are trimmed on three edges with the aid of two devices 30.2 and 30.3 according to the invention, which are arranged coaxially and are coaxially arranged and driven simultaneously.
- the two cutting devices 30.2 and 30.3 each have, for example, four blades 11 rotating around a pivot axis M and having first cutting edges SK.
- the products P are fed in a feed direction F.3 between the two devices 30.2 and 30.3, the back R of the products P being aligned in the feed direction F.3.
- the product edge parallel to the spine R is trimmed by one (30.2) of the two cutting devices.
- the products are then rotated through 90 ° about their own axis in such a way that the back is directed perpendicular to the conveying direction F.3, and the product flow is turned back by devices 180.2 against devices 30.2 and 30.3, such that the products, for example can be conveyed again with a leading back with a further feed direction F.4 between the devices 30.2 and 30.3.
- the two product edges aligned perpendicular to the back R are simultaneously trimmed by the two devices 30.2 and 30.3.
- the products are deflected by 90 °, for example without changing their spatial position, and conveyed away in a direction of conveyance F.5.
- the cutting arrangement is reversed relative to the force of gravity in relation to all the variants described above.
- the first cutting edge (not shown in FIG. 10) is not arranged below the products P (in the support plane of the products) but above the products and that the second cutting edges SK 2 are not moved from top to bottom for the cutting engagement but from bottom to top.
- means are to be provided with which the products are held against the first cutting edges, a function which is carried out by gravity in the reverse embodiments.
- Cutting devices according to the invention can be used not only for trimming printed products or other objects, as shown in FIGS. 9 and 10, but also for cutting printed products (double use) or other objects into two parts to be used further.
- the cutting method and devices according to the invention are not only applicable for cutting individual objects which are spaced apart and conveyed one behind the other. They can also be used for the longitudinal cutting or lateral cutting of streams of scale from overlapping conveyed flat objects or from quasi endless, continuously conveyed material webs. In such cases, the condition for the distance x between the objects to be cut is eliminated and the condition for the rotational speed ⁇ is that n times the cutting length (S r S 2 ', FIG. 1) is not smaller may be as the material feed during one revolution of the carrier with the n star-shaped blades with second cutting edges.
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- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Cutting Processes (AREA)
- Auxiliary Devices For And Details Of Packaging Control (AREA)
- Details Of Cutting Devices (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53241898A JP4077884B2 (en) | 1997-01-30 | 1998-01-28 | Method and apparatus for cutting flat objects conveyed continuously |
DE59803847T DE59803847D1 (en) | 1997-01-30 | 1998-01-28 | METHOD AND DEVICE FOR CUTTING CONTINUOUSLY PROPOSED, LARGE OBJECTS |
EP98900522A EP0960006B1 (en) | 1997-01-30 | 1998-01-28 | Method and device for cutting continuously delivered flat objects |
DK98900522T DK0960006T3 (en) | 1997-01-30 | 1998-01-28 | Method and apparatus for cutting continuously transported flat objects |
CA002279866A CA2279866C (en) | 1997-01-30 | 1998-01-28 | Method and device for cutting continuously delivered flat objects |
AU55475/98A AU739661B2 (en) | 1997-01-30 | 1998-01-28 | Method and device for cutting continuously conveyed, flat objects |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH21597 | 1997-01-30 | ||
CH215/97 | 1997-01-30 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/954,337 Continuation US6615699B2 (en) | 1999-09-17 | 2001-09-10 | Method and device for cutting continuously conveyed, flat objects |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998033630A1 true WO1998033630A1 (en) | 1998-08-06 |
Family
ID=4181900
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CH1998/000031 WO1998033630A1 (en) | 1997-01-30 | 1998-01-28 | Method and device for cutting continuously delivered flat objects |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0960006B1 (en) |
JP (1) | JP4077884B2 (en) |
AU (1) | AU739661B2 (en) |
CA (1) | CA2279866C (en) |
DE (1) | DE59803847D1 (en) |
DK (1) | DK0960006T3 (en) |
WO (1) | WO1998033630A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2014427A3 (en) * | 2007-07-11 | 2009-03-04 | Ferag AG | Method and device for separating continuously supplied paper piles |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1642081A (en) * | 1925-09-04 | 1927-09-13 | Dahlberg & Company Inc | Apparatus for slitting continuously-moving material |
GB932281A (en) * | 1961-05-19 | 1963-07-24 | Mueller Hans | Cutter machine for paper |
US3153964A (en) * | 1960-05-26 | 1964-10-27 | Sun Printers Ltd | Production of magazines, pamphlets and the like |
DE1258826B (en) * | 1966-11-07 | 1968-01-18 | Leipziger Buchbindereimaschine | Flow cutter |
DE2517121A1 (en) * | 1975-04-18 | 1976-10-28 | Helga Schaefferling Fa | Cutting machine for plastics film or paper - includes circular and straight knives the former being rotated by a rack and pinion arrangement |
EP0367715A1 (en) * | 1988-10-31 | 1990-05-09 | Ferag AG | Method and device for trimming printed produce |
-
1998
- 1998-01-28 EP EP98900522A patent/EP0960006B1/en not_active Expired - Lifetime
- 1998-01-28 AU AU55475/98A patent/AU739661B2/en not_active Ceased
- 1998-01-28 WO PCT/CH1998/000031 patent/WO1998033630A1/en active IP Right Grant
- 1998-01-28 DE DE59803847T patent/DE59803847D1/en not_active Expired - Lifetime
- 1998-01-28 JP JP53241898A patent/JP4077884B2/en not_active Expired - Fee Related
- 1998-01-28 DK DK98900522T patent/DK0960006T3/en active
- 1998-01-28 CA CA002279866A patent/CA2279866C/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1642081A (en) * | 1925-09-04 | 1927-09-13 | Dahlberg & Company Inc | Apparatus for slitting continuously-moving material |
US3153964A (en) * | 1960-05-26 | 1964-10-27 | Sun Printers Ltd | Production of magazines, pamphlets and the like |
GB932281A (en) * | 1961-05-19 | 1963-07-24 | Mueller Hans | Cutter machine for paper |
DE1258826B (en) * | 1966-11-07 | 1968-01-18 | Leipziger Buchbindereimaschine | Flow cutter |
DE2517121A1 (en) * | 1975-04-18 | 1976-10-28 | Helga Schaefferling Fa | Cutting machine for plastics film or paper - includes circular and straight knives the former being rotated by a rack and pinion arrangement |
EP0367715A1 (en) * | 1988-10-31 | 1990-05-09 | Ferag AG | Method and device for trimming printed produce |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2014427A3 (en) * | 2007-07-11 | 2009-03-04 | Ferag AG | Method and device for separating continuously supplied paper piles |
US8069759B2 (en) | 2007-07-11 | 2011-12-06 | Ferag Ag | Method and device for separating continuously conveyed material webs |
Also Published As
Publication number | Publication date |
---|---|
DK0960006T3 (en) | 2002-08-12 |
CA2279866A1 (en) | 1998-08-06 |
EP0960006B1 (en) | 2002-04-17 |
DE59803847D1 (en) | 2002-05-23 |
CA2279866C (en) | 2006-05-23 |
EP0960006A1 (en) | 1999-12-01 |
JP2001509742A (en) | 2001-07-24 |
AU739661B2 (en) | 2001-10-18 |
JP4077884B2 (en) | 2008-04-23 |
AU5547598A (en) | 1998-08-25 |
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