EP2473434B1 - Cutting tool - Google Patents
Cutting tool Download PDFInfo
- Publication number
- EP2473434B1 EP2473434B1 EP20100745216 EP10745216A EP2473434B1 EP 2473434 B1 EP2473434 B1 EP 2473434B1 EP 20100745216 EP20100745216 EP 20100745216 EP 10745216 A EP10745216 A EP 10745216A EP 2473434 B1 EP2473434 B1 EP 2473434B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cutting edge
- hollow body
- prism
- cutting tool
- cutting
- 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.)
- Not-in-force
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67B—APPLYING CLOSURE MEMBERS TO BOTTLES JARS, OR SIMILAR CONTAINERS; OPENING CLOSED CONTAINERS
- B67B7/00—Hand- or power-operated devices for opening closed containers
- B67B7/30—Hand-operated cutting devices
Definitions
- the invention relates to a cutting tool for cutting a flat portion of a flat structure, in particular a thin-walled wall portion of a container, and for receiving the flat portion or the cut wall portion in the cutting tool according to the preamble of claim 1 and as shown in US 1 789 729 known.
- Such cutting tools are known. They are e.g. used for opening cans or beverage cans. Usually this is done from a e.g. cylindrical canning or beverage can cut the end face by the cutting tool, wherein a part of the can wall is partially or completely cut out. If only partially cut out, the cut-out portion of the can wall can be bent into or out of the can to create a sufficiently large opening in the can.
- the surface of the inner wall of the cylindrical cutting tool is a smooth, pure cylinder surface, it may occur in successively cutting out wall sections from identical cans that the cut-out part of the can wall clamps inside the cylinder, or that the cut-out part of the can from the inside of the cylinder and falls into the can.
- the difference between falling out clipping and moderately jammed, ie easily removable from the cutting tool Cutout only very small differences in the dimensions of the cut-out part and / or in the geometry of the receiving cylinder are responsible, so far no satisfactory results could be achieved with reproducible cutting and clamping the can wall cutout.
- the invention has for its object to provide a cutting tool of the type described above, which works reproducibly and arise in the virtually no chips, in particular no metal chips.
- the invention provides a cutting tool for cutting a flat portion of a sheet-like structure, in particular a thin-walled wall portion of a container, and for receiving the flat portion or the cut wall portion in the cutting tool.
- the cutting tool is formed by a base body.
- This main body has, at least in a partial region, a prism-shaped hollow body with a prism-shaped jacket wall whose end edge is shaped as a cutting edge extending along the circumferential direction of the prism-shaped hollow body and bordering the end opening of the hollow body.
- the base body also has a connection region for connecting the base body to a drive means.
- the front edge of the prism-shaped jacket wall which is shaped as a cutting edge has a course along the circumferential direction with different axial positions in the axial direction of the prism-shaped hollow body.
- the front edge provided with the cutting edge has at least in two cutting edge peripheral portions each having along the axial direction projecting cutting edge portion, on the inside of the prismatic shell wall inner surface has a recess which is adjacent to the respective projecting cutting edge portion of the cutting edge.
- the cutting edge extends continuously along the entire circumferential direction of the prism-shaped hollow body; wherein each serving as a trimmer axially withdrawn cutting edge portion is disposed between serving as a pre-cutter axially projecting cutting edge portions.
- the coats-wall inner surface has at the projecting cutting edge sections along the axial direction to the cutting edge an oblique course, in which the measured from a longitudinal axis L of the prismatic hollow body radial distance Ri from the longitudinal axis L to the shell wall inner surface along the axial direction to the cutting edge increases; or the shell wall inner surface has at the projecting cutting edge portions a recess in the form of an annular groove which does not border to the tip of the respective projecting portions; and the jacket wall inner surface does not have an oblique course at the withdrawn cutting edge sections, ie here the radial distance Ri measured from the longitudinal axis L of the prismatic hollow body is constant from the longitudinal axis L to the shell wall inner face along the axial direction.
- the projection of the cutting edge profile on a plane orthogonal to the axial direction, such as the plane of the planar structure has a bulge or an "ear" (see Fig. 6 and Fig. 12 ).
- a bulge which corresponds to the bulge in said projection of the cutting edge profile, is formed on the cut-out flat section.
- each with a recess adjacent to this cutting edge portion in the shell wall inner surface is obtained when cutting the portion of the sheet a section with two bulges.
- the profile of the projection of the cutting edge and the outline of the flat portion cut out with such a cutting edge have a bulge.
- the section in the interior of the hollow body clamps firmly to the prism-shaped jacket wall, which adjoins the projecting cutting edge sections. The clamped over such bulges flat sections or wall sections clamp firmly enough to prevent their uncontrolled falling out of the prismatic hollow body. On the other hand, they do not clamp so hard that you have to exert very large impact forces for their ejection.
- the cutting tool it is possible to start from a prism-shaped hollow body which forms the main body of the cutting tool. It is then possible in a first step of the end edge, which runs around the end opening of this hollow body, e.g. by grinding and sharpening, to impart a cutting edge course along the circumferential direction that has different axial positions, i. has axially projecting cutting edge portions along the axial direction of the prismatic hollow body. In a second step, the recesses can then be worked into the jacket wall inner surface in the areas of the protruding cutting edge sections. At the points where the recesses hit the cutting edge, bulges occur in the projection of the cutting edge profile. The two steps can also be performed in reverse order.
- the grinding and sharpening takes place in a second step, wherein it ensures that the cutting edge produced crosses the recesses. In the places where the cutting edge crosses the recesses, bulges arise in the projection of the cutting edge course.
- the axially projecting cutting edge portions are rounded tips.
- the cutting edge has at least in two circumferential regions in the axial direction in each case a projecting portion on which the shell wall inner surface along the axial direction to the cutting edge has an oblique course, wherein the measured from a longitudinal axis of the prismatic hollow body radial distance to the shell wall inner surface increases along the axial direction to the cutting edge.
- the first bleed or puncture takes place at points that are based on the cut-out part of the container wall farther out. If the cutting edge now penetrates somewhat deeper into the container wall, the radial distance measured from the longitudinal axis of the penetrating prismatic hollow body to the casing wall inner surface decreases along the axial direction toward the cutting edge. This decrease in the radial distance between the cutting edge and the longitudinal axis of the prism-shaped hollow body takes place at least in two peripheral regions in which the axially projecting portions, so-called. Pre-cutter or tips are arranged.
- the cutting tool according to the invention is suitable for cutting thin metal (sheet metal), in particular aluminum, and for cutting thin polymer material (foil, sheets, thin plates), in particular polyethylene terephthalate (PET), polybutylene terephthalate (PBT), cellulose-based material such as paper or cardboard , or starch-based materials such as flat-rolled or pressed foods.
- sheet metal sheet metal
- thin polymer material foil, sheets, thin plates
- PET polyethylene terephthalate
- PBT polybutylene terephthalate
- cellulose-based material such as paper or cardboard
- starch-based materials such as flat-rolled or pressed foods.
- the cutting tool is heated.
- an optimum cutting tool temperature for cutting can then be set.
- the jacket wall inner surface of the cutting tool only in the peripheral regions with the respective projecting cutting edge portions of the inclined edge to the cutting edge.
- the oblique course of the shell wall inner surface may be formed by a flat ground or by a curved ground.
- the jacket wall outer surface preferably also has an oblique course along the axial direction up to the cutting edge, wherein the radial distance measured from a longitudinal axis of the prismatic hollow body to the jacket wall outer surface decreases along the axial direction towards the cutting edge.
- the peripheral regions are distributed uniformly with the axially protruding portions along the circumferential direction.
- the prism-shaped hollow body may have a circular, an oval or a polygonal cross-section.
- a cylindrical cutting tool with a circular cross section is particularly easy to produce.
- the pits may be e.g. be prepared by grinding an annular groove on the cylindrical shell wall inner surface. Thereafter, the protrusions in the projection of the cut edge course can be made by crossing the previously prepared annular groove during grinding and sharpening of the cylinder wall end edge. Again, the order of the two steps can be reversed.
- the prism-shaped shell wall at least in the region of its cutting edge made of steel, ceramic or tungsten carbide.
- the axial length (b) of the area with the recess on the shell wall inner surface at the projecting portions is smaller than the maximum difference (a) of the various axial positions of the cutting edge along the circumferential direction.
- the jacket wall inner surface of the prism-shaped hollow body has a microscopically rough surface and / or macroscopic elevations at least in an axial subregion of the inner surface.
- the cutting tool has a plunger, which extends through a plunger opening of the base body and / or stored in this, and which is axially reciprocally movable inside the prism-shaped hollow body, so that contained in the interior of the hollow body cut wall portions of the hollow body can be ejected.
- the cutting tool has an outlet opening in addition to the end opening, so that inside the prism-shaped hollow body previously recorded and optionally stacked cut wall sections can be ejected via later cut-out cut-out sections in the hollow body.
- a suction device can also be connected to the outlet opening, so that cut-out wall sections contained in the interior of the hollow body can be sucked out of the hollow body.
- the connecting portion of the cutting tool may include a handle.
- the cutting tool may have a pincer-like or clip-like holding device, on whose first leg the base body having the cutting edge is fastened by means of its connection region, and on whose second leg of the thin wall portion having container is fastened, so that by a relative movement of the two legs, the cutting edge can be pressed against the thin-walled wall portion and through it.
- the prism-shaped hollow body can have an expanded cross-section in a partial region of its inner wall along its axial direction. In this axial region of the hollow body, cut-out portions can be loosely stacked, so that after a certain number of opening or cutting operations, the ejection of the accumulated in the cavity sections can be done without much effort.
- Fig. 1 is a plan view of a first embodiment of the inventive cutting tool 1 along its longitudinal axis L shown.
- the cutting tool 1 is for cutting out a thin-walled wall portion from a container such as a beverage can (not shown) and for receiving the cut-out wall portion in the cutting tool 1.
- the cutting tool 1 has four projecting portions 5a, 5b, 5c along its cutting edge 5 and 5d and four retracted portions 5e, 5f, 5g and 5h (see also FIG Fig. 2 ).
- a central hole 6a is provided on which the cutting tool 1 can be connected to a drive means (not shown).
- Fig. 2 is a side view of the embodiment of Fig. 1 shown transversely to its longitudinal axis L.
- the cutting tool 1 is formed by a main body 2, which has a prism-shaped hollow body 3 in a partial region.
- This hollow body 3 is formed by a prism-shaped jacket wall 4, the end edge 5 of which is shaped as a cutting edge 5 extending along the circumferential direction of the prism-shaped hollow body 3 and encompassing its front opening Fig. 2 points upwards.
- the drive means may be a hand operated, levered machine in which the cutting tool up and down by muscle power via a lever assembly can be moved.
- a can, eg beverage can, can be fixed in the machine.
- the cutting edge 5 has along its circumferential direction a course with different axial positions in the axial direction of the prismatic hollow body 3.
- the cutting edge 5 in four peripheral regions axially projecting portions 5a, 5b, 5c and 5d (see Fig. 1 ), of which in Fig. 2 only the two sections 5a and 5b are visible.
- the shell wall inner surface 4a along the axial direction to the cutting edge 5 has an oblique course 7a (see Fig. 3 ).
- the radial distance Ri measured from the longitudinal axis L of the prism-shaped hollow body 3 increases from the longitudinal axis L to the casing wall inner surface 4a along the axial direction towards the cutting edge 5.
- the cutting edge 5 has retracted portions 5e, 5f, 5g and 5h (see Figs Fig. 1 ), of which in Fig. 2 only the sections 5e, 5f and 5h are visible.
- the casing wall inner surface 4a has no oblique course 7a (see Fig. 3 ).
- the radial distance Ri measured from the longitudinal axis L of the prismatic hollow body 3 is constant from the longitudinal axis L to the shell wall inner surface 4a along the axial direction.
- the lid when moving the cutting tool 1 downwards against a can, the lid can be cut open at the can end face and finally cut out.
- the can lid At the protruding portions 5a, 5b, 5c and 5d, which are rounded tips, the can lid is first pierced. During the subsequent further penetration of the sections 5e, 5f, 5g and 5h of the cutting tool 1 into the can lid, the latter is completely cut out and is clamped in the interior 11 of the hollow body 3 by the jacket wall inner surface 4a.
- Fig. 3 is an enlarged view of a detail of the inventive cutting tool in the circled area Z of Fig. 1 shown.
- An oblique course 7a in the form of an oblique cut on the cutting edge 5 can be seen on the casing wall inner surface 4a.
- This oblique course 7a is only at the regions with the projecting portions or rounded tips 5a, 5b, 5c and 5d of the casing wall inner surface 4a formed.
- the jacket wall inner surface 4a has no oblique course 7a.
- Fig. 4 is a view of the inventive cutting tool 1 along the cutting plane XX of Fig. 1 shown
- Fig. 5 is a view of the inventive cutting tool along the cutting plane YY of Fig. 1 shown.
- the acute angle f is in the range of 5 ° to 90 °, preferably in the range of 10 ° to 60 °, and most preferably in the range of 25 ° to 45 °.
- the acute angle f is the angle at the tapered cutting edge 5 between the bevel 7a on the shell wall inner surface 4a and the bevel 7b on the shell wall outer surface 4b.
- the chamfer 7a forms an angle d to the longitudinal axis L.
- the chamfer 7b forms an angle e to the longitudinal axis L.
- the acute angle f is the sum of the angles d and e.
- Fig. 4 shows a section through a protruding portion 5 b as one of the four protruding portions (see section XX in Fig. 1 ). From the connecting region 6, the cylindrical jacket wall 4 extends to the cutting edge 5.
- the jacket wall inner surface 4a is a cylinder wall with radius Ri (see Fig. 2 ) and has only in the region of the cutting edge 5 an oblique course 7a, which may be formed as a flat or conical ground.
- the jacket wall outer surface 4b is a cylinder wall with radius Ra (see Fig. 2 ) and in the region of the cutting edge 5 also has an oblique course 7b, which is designed as a conical cut and extends along the entire circumferential direction of the cutting tool 1.
- Pre-cutter shown in section projecting portion 5b of the cutting edge 5 serves as a "pre-cutter".
- the same function has the other three protruding sections 5a, 5c and 5d of the cutting edge 5.
- These four Pre-cutters 5a, 5b, 5c and 5d are distributed uniformly along the circumferential direction of the cutting tool 1.
- Fig. 5 shows a section through retracted portion 5f as one of the four retracted sections (see section YY in Fig. 1 ). From the connecting region 6, the cylindrical jacket wall 4 extends to the cutting edge 5.
- the jacket wall inner surface 4a is a cylinder wall with radius Ri (see Fig. 2 ) and has only in the area of the cutting edge 5 no oblique course 7a.
- the jacket wall outer surface 4b is a cylinder wall with radius Ra (see Fig. 2 ) and in the region of the cutting edge 5 also has an oblique course 7b, which is designed as a conical cut and extends along the entire circumferential direction of the cutting tool 1.
- the axial length b of the inclined slope portion 7a on the precuters 5a, 5b, 5c and 5d of the shell wall inner surface 4a is smaller than the maximum axial difference a between the various projected axial positions 5a, 5b, 5c, 5d and the various retracted ones axial positions 5e, 5f, 5g, 5h of the cutting edge 5 along the circumferential direction.
- the cutting tool 1 is suitable for cutting out a thin-walled wall section from a tin can, e.g. an aluminum beverage can, or from a polymer container, such as e.g. a container of polyethylene terephthalate (PET), and for receiving the cut-out wall portion in the interior 11 of the cutting tool first
- a tin can e.g. an aluminum beverage can
- a polymer container such as e.g. a container of polyethylene terephthalate (PET)
- the large or outer cutting circle SKG determined by the cutting edge positions of the precut bevel 5a, 5b, 5c and 5d at a respective tooth tip has a larger diameter than the small or inner cutting circle SKK determined by the cutting edge positions of the reamers 5e, 5f, 5g and 5h on a respective tooth base (see Fig. 5 ).
- the difference between the diameters of the two cutting circles SKG and SKK is 2c (see Fig. 4 ).
- Fig. 4 and in Fig. 5 can be seen on the prism-shaped hollow body 3, a portion 4c of its inner wall, which has along its axial direction an expanded cross-section.
- cut-out portions 12 are stacked loosely, so that after a certain number of opening or Ausschneidevor réellen the ejection of the accumulated in the cavity 3 sections 12 can be done without much effort.
- Fig. 6 is a plan view of a cut-out flat portion 12, which was prepared with a cutting tool 1 according to the first embodiment.
- the outer edge 13 of the portion 12 has four circumferentially uniformly distributed protrusions 13a, 13b, 13c and 13d (exaggerated) made by the protruding portions 5a, 5b, 5c and 5d, respectively.
- the course of the projection of the cutting edge 5 corresponds to the course of the outer edge 13 of the section 12th
- Fig. 7 is a plan view of a second embodiment of the inventive cutting tool along its longitudinal axis L shown.
- This second embodiment differs from the first embodiment in that in the protruding portions 5a ', 5b', 5c 'and 5d' a recess 7a 'is provided in the form of an annular groove.
- This recess 7a 'does not abut the tip of the respective projecting portions 5a', 5b ', 5c' and 5d '.
- the projection of the cutting edge course has a bulge.
- FIGS. 7 to 12 are parts which have the same reference numerals as in the FIGS. 1 to 6 wear, identical with these parts.
- Fig. 12 is a plan view of a cut-out flat portion 12 'shown with a cutting tool 1' according to the second Embodiment was made.
- the outer edge 13 'of the portion 12' has four circumferentially uniformly distributed bulge pairs 13a ', 13b', 13c 'and 13d' (exaggerated) formed by the protruding portions 5a ', 5b', 5c 'and 5d', respectively were.
- the course of the projection of the cutting edge 5 ' corresponds to the course of the outer edge 13 'of the section 12'.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Drilling Tools (AREA)
- Devices For Opening Bottles Or Cans (AREA)
- Food-Manufacturing Devices (AREA)
- Milling Processes (AREA)
Description
Die Erfindung bezieht sich auf ein Schneidwerkzeug zum Ausschneiden eines flächigen Abschnitts aus einem flächigen Gebilde, insbesondere eines dünnwandigen Wandabschnitts aus einem Behälter, und zum Aufnehmen des flächigen Abschnitts bzw. des ausgeschnittenen Wandabschnitts in dem Schneidwerkzeug gemäß dem Oberbegriff des Anspruchs 1 und wie aus der
Derartige Schneidwerkzeuge sind bekannt. Sie werden z.B. zum Öffnen von Konservendosen oder von Getränkedosen verwendet. Meistens wird dabei aus einer z.B. zylinderförmigen Konserven- oder Getränkedose die Stirnfläche durch das Schneidwerkzeug aufgeschnitten, wobei ein Teil der Dosenwand teilweise oder vollständig ausgeschnitten wird. Wenn nur teilweise ausgeschnitten wird, kann der ausgeschnittene Abschnitt der Dosenwand in die Dose hinein oder aus ihr heraus gebogen werden, um eine ausreichend grosse Öffnung in der Dose zu erzeugen.Such cutting tools are known. They are e.g. used for opening cans or beverage cans. Mostly this is done from a e.g. cylindrical canning or beverage can cut the end face by the cutting tool, wherein a part of the can wall is partially or completely cut out. If only partially cut out, the cut-out portion of the can wall can be bent into or out of the can to create a sufficiently large opening in the can.
Wenn vollständig ausgeschnitten wird, sollte vor allem aus hygienischen Gründen verhindert werden, dass der ausgeschnittene Teil in die Dose und deren Inhalt hineinfällt. Hierfür gibt es Schneidwerkzeuge in Form einer zylinderförmigen Wand, bei der eine der stirnseitigen Kanten als Schneidmesser geschliffen ist. Wenn ein solches Schneidwerkzeug mit seinem Schneidmesser gegen eine Dosenwand gedrückt wird, kann bei ausreichend scharfem Schneidmesser und/oder ausreichend starkem Anpressen des Schneidmessers gegen die Dosenwand der Teil der Dosenwand meist problemlos ausgeschnitten werden. Hingegen treten immer wieder Probleme auf beim Aufnehmen des ausgeschnittenen Teils der Dosenwand in dem Schneidwerkzeug. Wenn die Oberfläche der Innenwand des zylinderförmigen Schneidwerkzeugs eine glatte reine Zylinderfläche ist, kann es bei nacheinander stattfindendem Ausschneiden von Wandabschnitten aus identischen Dosen vorkommen, dass sich der ausgeschnittene Teil der Dosenwand im Innern des Zylinders festklemmt, oder dass der ausgeschnittene Teil der Dose aus dem Innern des Zylinders heraus- und in die Dose hineinfällt. Da für den Unterschied zwischen herausfallendem Ausschnitt und moderat festgeklemmtem, d.h. aus dem Schneidwerkzeug leicht entfernbarem Ausschnitt nur sehr kleine Unterschiede in den Abmessungen des ausgeschnittenen Teils und/oder in der Geometrie des Aufnahmezylinders verantwortlich sind, konnten bisher keine befriedigenden Ergebnisse mit reproduzierbarem Ausschneiden und Festklemmen des Dosenwand-Ausschnitts erzielt werden.When cutting out completely, it is best to prevent the cut-out part from falling into the can and its contents, especially for hygienic reasons. For this purpose, there are cutting tools in the form of a cylindrical wall, in which one of the frontal edges is ground as a cutting blade. When such a cutting tool is pressed with its cutting blade against a can wall, with sufficient sharp cutting blade and / or sufficiently strong pressing of the cutting blade against the can wall, the part of the can wall can usually be easily cut out. On the other hand, there are always problems in picking up the cut-out portion of the can wall in the cutting tool. If the surface of the inner wall of the cylindrical cutting tool is a smooth, pure cylinder surface, it may occur in successively cutting out wall sections from identical cans that the cut-out part of the can wall clamps inside the cylinder, or that the cut-out part of the can from the inside of the cylinder and falls into the can. As for the difference between falling out clipping and moderately jammed, ie easily removable from the cutting tool Cutout only very small differences in the dimensions of the cut-out part and / or in the geometry of the receiving cylinder are responsible, so far no satisfactory results could be achieved with reproducible cutting and clamping the can wall cutout.
Es gab Versuche, mit Widerhaken an der Schneidwerkzeug-Innenseite, d.h. an der inneren Zylinderwand ein zuverlässigeres Ergebnis zu erzielen, wie dies z.B. in der
Der Erfindung liegt die Aufgabe zugrunde, ein Schneidwerkzeug der eingangs beschriebenen Bauart bereitzustellen, das reproduzierbar funktioniert und bei dem praktisch keine Späne, insbesondere keine Metallspäne entstehen.The invention has for its object to provide a cutting tool of the type described above, which works reproducibly and arise in the virtually no chips, in particular no metal chips.
Zur Lösung der Erfindung stellt die Erfindung ein Schneidwerkzeug bereit zum Ausschneiden eines flächigen Abschnitts aus einem flächigen Gebilde, insbesondere eines dünnwandigen Wandabschnitts aus einem Behälter, und zum Aufnehmen des flächigen Abschnitts bzw. des ausgeschnittenen Wandabschnitts in dem Schneidwerkzeug. Das Schneidwerkzeug ist durch einen Grundkörper gebildet. Dieser Grundkörper weist zumindest in einem Teilbereich einen prismenförmigen Hohlkörper mit einer prismenförmigen Mantelwand auf, deren Stirnkante als eine sich entlang der Umfangsrichtung des prismenförmigen Hohlkörpers erstreckende und die Stirnöffnung des Hohlkörpers umrandende Schneidkante geformt ist. Der Grundkörper weist ausserdem einen Verbindungsbereich zum Verbinden des Grundkörpers mit einem Antriebsmittel auf. Die als Schneidkante geformte Stirnkante der prismenförmigen Mantelwand hat entlang der Umfangsrichtung einen Verlauf mit unterschiedlichen axialen Positionen in Axialrichtung des prismenförmigen Hohlkörpers. Die mit der Schneidkante versehene Stirnkante hat zumindest in zwei Schneidkanten-Umfangsbereichen jeweils einen entlang der Axialrichtung vorstehenden Schneidkanten-Abschnitt, an dessen Innenseite die prismenförmige Mantelwand-Innenfläche eine Vertiefung aufweist, die an den jeweiligen vorstehenden Schneidkanten-Abschnitt der Schneidkante angrenzt. Erfindungsgemäss erstreckt sich die Schneidkante durchgehend entlang der gesamten Umfangsrichtung des prismenförmigen Hohlkörpers; wobei zwischen den als Vorschneider dienenden axial vorstehenden Schneidkanten-Abschnitten jeweils ein als Nachschneider dienender axial zurückgezogener Schneidkanten-Abschnitt angeordnet ist. Die Mäntelwand-Innenfläche hat dabei an den vorstehenden Schneidkanten-Abschnitten entlang der Axialrichtung bis zur Schneidkante einen schrägen Verlauf, bei dem der von einer Längsachse L des prismenförmigen Hohlkörpers gemessene radiale Abstand Ri von der Längsachse L zur Mantelwand-Innenfläche entlang der Axialrichtung zur Schneidkante hin zunimmt; oder die Mantelwand-Innenfläche hat an den vorstehenden Schneidkanten-Abschnitten eine Vertiefung in Form einer Ringnut, die nicht bis an die Spitze der jeweiligen vorstehenden Abschnitte grenzt; und die Mantelwand-Innenfläche hat dabei an den zurückgezogenen Schneidkanten-Abschnitten keinen schrägen Verlauf, d.h. hier ist der von der Längsachse L des prismenförmigen Hohlkörpers gemessene radiale Abstand Ri von der Längsachse L zur Mantelwand-Innenfläche entlang der Axialrichtung konstant.To solve the invention, the invention provides a cutting tool for cutting a flat portion of a sheet-like structure, in particular a thin-walled wall portion of a container, and for receiving the flat portion or the cut wall portion in the cutting tool. The cutting tool is formed by a base body. This main body has, at least in a partial region, a prism-shaped hollow body with a prism-shaped jacket wall whose end edge is shaped as a cutting edge extending along the circumferential direction of the prism-shaped hollow body and bordering the end opening of the hollow body. The base body also has a connection region for connecting the base body to a drive means. The front edge of the prism-shaped jacket wall which is shaped as a cutting edge has a course along the circumferential direction with different axial positions in the axial direction of the prism-shaped hollow body. The front edge provided with the cutting edge has at least in two cutting edge peripheral portions each having along the axial direction projecting cutting edge portion, on the inside of the prismatic shell wall inner surface has a recess which is adjacent to the respective projecting cutting edge portion of the cutting edge. According to the invention, the cutting edge extends continuously along the entire circumferential direction of the prism-shaped hollow body; wherein each serving as a trimmer axially withdrawn cutting edge portion is disposed between serving as a pre-cutter axially projecting cutting edge portions. The coats-wall inner surface has at the projecting cutting edge sections along the axial direction to the cutting edge an oblique course, in which the measured from a longitudinal axis L of the prismatic hollow body radial distance Ri from the longitudinal axis L to the shell wall inner surface along the axial direction to the cutting edge increases; or the shell wall inner surface has at the projecting cutting edge portions a recess in the form of an annular groove which does not border to the tip of the respective projecting portions; and the jacket wall inner surface does not have an oblique course at the withdrawn cutting edge sections, ie here the radial distance Ri measured from the longitudinal axis L of the prismatic hollow body is constant from the longitudinal axis L to the shell wall inner face along the axial direction.
An einem an eine solche Vertiefung angrenzenden durchgehenden Schneidkanten-Bereich weist die Projektion des Schneidkanten-Verlaufs auf eine zur Axialrichtung orthogonale Ebene, wie z.B. die Ebene des flächigen Gebildes, eine Ausbuchtung bzw. ein "Ohr" auf (siehe
Aufgrund der mindestens zwei in Axialrichtung vorstehenden Schneidkanten-Abschnitte mit jeweils einer an diesen Schneidkanten-Abschnitt angrenzenden Vertiefung in der Mantelwand-Innenfläche erhält man beim Ausschneiden des Abschnitts aus dem flächigen Gebilde einen Abschnitt mit zwei Ausbuchtungen.Due to the at least two axially projecting cutting edge sections, each with a recess adjacent to this cutting edge portion in the shell wall inner surface is obtained when cutting the portion of the sheet a section with two bulges.
Im allgemeinen ist es so, dass dort wo die Vertiefung der Mantelwand-Innenfläche an die Schneidkante grenzt, der Verlauf der Projektion der Schneidkante sowie der Umriss des mit einer solchen Schneidkante ausgeschnittenen flächigen Abschnitts eine Ausbuchtung haben. An diesen Ausbuchtungen bzw. "Ohren", von denen der erfindungsgemäss ausgeschnittene flächige Abschnitt mindestens zwei hat, klemmt sich der Abschnitt im Innern des Hohlkörpers an der prismenförmigen Mantelwand fest, die sich an die vorstehenden Schneidkanten-Abschnitte anschliesst. Die über solche Ausbuchtungen festgeklemmten flächigen Abschnitte bzw. Wandabschnitte klemmen fest genug, um ihr unkontrolliertes Herausfallen aus dem prismenförmigen Hohlkörper zu verhindern. Andererseits klemmen sie nicht so fest, dass man für ihr Ausstossen sehr grosse Stosskräfte ausüben muss.In general, where the recess of the casing wall inner surface adjoins the cutting edge, the profile of the projection of the cutting edge and the outline of the flat portion cut out with such a cutting edge have a bulge. At these bulges or "ears" of which the area cut out according to the invention has at least two, the section in the interior of the hollow body clamps firmly to the prism-shaped jacket wall, which adjoins the projecting cutting edge sections. The clamped over such bulges flat sections or wall sections clamp firmly enough to prevent their uncontrolled falling out of the prismatic hollow body. On the other hand, they do not clamp so hard that you have to exert very large impact forces for their ejection.
Zur Herstellung des erfindungsgemässen Schneidwerkzeugs kann man von einem prismenförmigen Hohlkörper ausgehen, der den Grundkörper des Schneidwerkzeugs bildet. Man kann dann in einem ersten Schritt der Stirnkante, die um die Stirnöffnung dieses Hohlkörpers herum verläuft, z.B. durch Abschleifen und Schärfen einen Schneidkanten-Verlauf entlang der Umfangsrichtung verleihen, der unterschiedliche axiale Positionen, d.h. axial vorstehende Schneidkanten-Abschnitte entlang der Axialrichtung des prismenförmigen Hohlkörpers hat. In einem zweiten Schritt können dann in den Bereichen der vorstehenden Schneidkanten-Abschnitte die Vertiefungen in die Mantelwand-Innenfläche eingearbeitet werden. An den Stellen, wo die Vertiefungen auf die Schneidkante treffen, entstehen Ausbuchtungen in der Projektion des Schneidkanten-Verlaufs. Die beiden Schritte können auch in umgekehrter Reihenfolge durchgeführt werden. Nachdem man in einem ersten Schritt die Vertiefungen in der Mantelwand-Innenfläche des Grundkörpers hergestellt hat, erfolgt das Abschleifen und Schärfen in einem zweiten Schritt, wobei man dafür sorgt, dass die hergestellte Schneidkante die Vertiefungen kreuzt. An den Stellen, wo die Schneidkante die Vertiefungen kreuzt, entstehen Ausbuchtungen in der Projektion des Schneidkanten-Verlaufs.To produce the cutting tool according to the invention, it is possible to start from a prism-shaped hollow body which forms the main body of the cutting tool. It is then possible in a first step of the end edge, which runs around the end opening of this hollow body, e.g. by grinding and sharpening, to impart a cutting edge course along the circumferential direction that has different axial positions, i. has axially projecting cutting edge portions along the axial direction of the prismatic hollow body. In a second step, the recesses can then be worked into the jacket wall inner surface in the areas of the protruding cutting edge sections. At the points where the recesses hit the cutting edge, bulges occur in the projection of the cutting edge profile. The two steps can also be performed in reverse order. After having made the recesses in the shell wall inner surface of the base body in a first step, the grinding and sharpening takes place in a second step, wherein it ensures that the cutting edge produced crosses the recesses. In the places where the cutting edge crosses the recesses, bulges arise in the projection of the cutting edge course.
Vorzugsweise sind bei dem Schneidwerkzeug die axial vorstehenden Schneidkanten-Abschnitte abgerundete Spitzen.Preferably, in the cutting tool, the axially projecting cutting edge portions are rounded tips.
Bei einer speziellen Ausführung hat die Schneidkante zumindest in zwei Umfangsbereichen in Axialrichtung jeweils einen vorstehenden Abschnitt, an dem die Mantelwand-Innenfläche entlang der Axialrichtung bis zur Schneidkante einen schrägen Verlauf hat, wobei der von einer Längsachse des prismenförmigen Hohlkörpers gemessene radiale Abstand zur Mantelwand-Innenfläche entlang der Axialrichtung zur Schneidkante hin zunimmt.In a specific embodiment, the cutting edge has at least in two circumferential regions in the axial direction in each case a projecting portion on which the shell wall inner surface along the axial direction to the cutting edge has an oblique course, wherein the measured from a longitudinal axis of the prismatic hollow body radial distance to the shell wall inner surface increases along the axial direction to the cutting edge.
Dies bewirkt, dass beim ersten, gleichzeitigen Auftreffen der vorstehenden Abschnitte der Schneidkante auf einen (praktisch ebenen) dünnwandigen Wandabschnitt eines Behälters der erste Anschnitt oder Anstich an Punkten erfolgt, die bezogen auf den ausgeschnittenen Teil der Behälterwand weiter aussen liegen. Dringt die Schneidkante nun etwas tiefer in die Behälterwand ein, so nimmt der von der Längsachse des eindringenden prismenförmigen Hohlkörpers gemessene radiale Abstand zur Mantelwand-Innenfläche entlang der Axialrichtung zur Schneidkante hin ab. Diese Abnahme des radialen Abstands zwischen der Schneidkante und der Längsachse des prismenförmigen Hohlkörpers erfolgt zumindest in zwei Umfangsbereichen, in denen die in Axialrichtung vorstehende Abschnitte, sog. Vorschneider bzw. Spitzen, angeordnet sind. Diese zunehmende Verringerung der Querschnittsfläche im Innern des prismenförmigen Hohlkörpers beim Eindringen der Schneidkante in die Behälterwand bewirkt eine definierte Verformung des ausgeschnitten Wandabschnitts an der Innenwand des prismenförmigen Hohlkörpers sowie ggfs. auch ein Stauchen des ausgeschnittenen Wandabschnitts während seines Ausschneidens. Dadurch wird der ausgeschnittene Wandabschnitt auf reproduzierbare Art und Weise im Innern des prismenförmigen Hohlkörpers festgeklemmt.This causes the first, simultaneous impact of the projecting portions of the cutting edge on a (practically flat) thin-walled wall portion of a container, the first bleed or puncture takes place at points that are based on the cut-out part of the container wall farther out. If the cutting edge now penetrates somewhat deeper into the container wall, the radial distance measured from the longitudinal axis of the penetrating prismatic hollow body to the casing wall inner surface decreases along the axial direction toward the cutting edge. This decrease in the radial distance between the cutting edge and the longitudinal axis of the prism-shaped hollow body takes place at least in two peripheral regions in which the axially projecting portions, so-called. Pre-cutter or tips are arranged. This increasing reduction of the cross-sectional area in the interior of the prism-shaped hollow body when the cutting edge penetrates into the container wall causes a defined deformation of the cut-out wall section on the inner wall of the prismatic hollow body and, if necessary, also a swaging of the cut-out wall section during its cutting. As a result, the cut-out wall section is clamped in a reproducible manner in the interior of the prism-shaped hollow body.
Das erfindungsgemässe Schneidwerkzeug eignet sich zum Schneiden von dünnem Metall (Blech), insbesondere Aluminium, sowie zum Schneiden von dünnem Polymermaterial (Folie, Bögen, dünne Platten), insbesondere Polyethylenterephthalat (PET), Polybutylenterephthalat (PBT), Material auf Cellulosebasis wie Papier oder Karton, oder aber Material auf Stärkebasis wie flach gewalzte oder gepresste Lebensmittel.The cutting tool according to the invention is suitable for cutting thin metal (sheet metal), in particular aluminum, and for cutting thin polymer material (foil, sheets, thin plates), in particular polyethylene terephthalate (PET), polybutylene terephthalate (PBT), cellulose-based material such as paper or cardboard , or starch-based materials such as flat-rolled or pressed foods.
Für das Schneiden von dünnem Polymermaterial ist es vorteilhaft, wenn das Schneidwerkzeug beheizt wird. Je nach Polymermaterial kann dann eine für das Schneiden optimale Schneidwerkzeug-Temperatur eingestellt werden.For cutting thin polymer material, it is advantageous if the cutting tool is heated. Depending on the polymer material, an optimum cutting tool temperature for cutting can then be set.
Vorzugsweise hat die Mantelwand-Innenfläche des Schneidwerkzeugs nur in den Umfangsbereichen mit den jeweiligen vorstehenden Schneidkanten-Abschnitten den zur Schneidkante hin schrägen Verlauf. Der schräge Verlauf der Mantelwand-Innenfläche kann durch einen ebenen Schliff oder durch einen gekrümmten Schliff gebildet sein.Preferably, the jacket wall inner surface of the cutting tool only in the peripheral regions with the respective projecting cutting edge portions of the inclined edge to the cutting edge. The oblique course of the shell wall inner surface may be formed by a flat ground or by a curved ground.
Ähnlich wie die Mantelwand-Innenfläche hat vorzugsweise auch die Mantelwand-Aussenfläche entlang der Axialrichtung bis zur Schneidkante einen schrägen Verlauf, wobei der von einer Längsachse des prismenförmigen Hohlkörpers gemessene radiale Abstand zur Mantelwand-Aussenfläche entlang der Axialrichtung zur Schneidkante hin abnimmt.Similar to the jacket wall inner surface, the jacket wall outer surface preferably also has an oblique course along the axial direction up to the cutting edge, wherein the radial distance measured from a longitudinal axis of the prismatic hollow body to the jacket wall outer surface decreases along the axial direction towards the cutting edge.
Vorzugsweise sind die Umfangsbereiche mit den in Axialrichtung vorstehenden Abschnitten entlang der Umfangsrichtung gleichmässig verteilt.Preferably, the peripheral regions are distributed uniformly with the axially protruding portions along the circumferential direction.
Der prismenförmige Hohlkörper kann einen kreisförmigen, einen ovalen oder einen polygonförmigen Querschnitt haben.The prism-shaped hollow body may have a circular, an oval or a polygonal cross-section.
Ein zylindrisches Schneidwerkzeug mit kreisförmigem Querschnitt lässt sich besonders leicht herstellen. Die Vertiefungen können z.B. durch Schleifen einer Ringnut an der zylinderförmigen Mantelwand-Innenfläche hergestellt werden. Danach können die Ausbuchtungen in der Projektion des Schnittkanten-Verlaufs hergestellet werden, indem man beim Schleifen und Schärfen der Zylinderwand-Stirnkante die zuvor hergestellte Ringnut kreuzt. Auch hier kann die Reihenfolge der beiden Schritte vertauscht werden.A cylindrical cutting tool with a circular cross section is particularly easy to produce. The pits may be e.g. be prepared by grinding an annular groove on the cylindrical shell wall inner surface. Thereafter, the protrusions in the projection of the cut edge course can be made by crossing the previously prepared annular groove during grinding and sharpening of the cylinder wall end edge. Again, the order of the two steps can be reversed.
Zweckmässigerweise besteht die prismenförmige Mantelwand zumindest im Bereich ihrer Schneidkante aus Stahl, aus Keramikmaterial oder aus Hartmetall.Conveniently, the prism-shaped shell wall, at least in the region of its cutting edge made of steel, ceramic or tungsten carbide.
Bei einer besonders vorteilhaften Ausführung ist die axiale Länge (b) des Bereichs mit der Vertiefung an der Mantelwand-Innenfläche bei den vorstehenden Abschnitten kleiner als die maximale Differenz (a) der verschiedenen axialen Positionen der Schneidkante entlang der Umfangsrichtung.In a particularly advantageous embodiment, the axial length (b) of the area with the recess on the shell wall inner surface at the projecting portions is smaller than the maximum difference (a) of the various axial positions of the cutting edge along the circumferential direction.
Bei einer weiteren vorteilhaften Ausführung hat die Mantelwand-Innenfläche des prismenförmigen Hohlkörpers zumindest in einem axialen Teilbereich der Innenfläche eine mikroskopisch rauhe Oberfläche und/oder makroskopische Erhebungen.In a further advantageous embodiment, the jacket wall inner surface of the prism-shaped hollow body has a microscopically rough surface and / or macroscopic elevations at least in an axial subregion of the inner surface.
Vorzugsweise hat das Oberflächenprofil der Mantelwand-Innenfläche (4a) und das Oberflächenprofil der Mantelwand-Aussenfläche (4b) entlang der axialen Richtung stumpfe Kanten (8) von mindestens 120° bzw. Richtungsänderungen der Oberflächentangente (d bzw. e) von höchstens 60°.Preferably, the surface profile of the shell wall inner surface (4a) and the surface profile of the shell wall outer surface (4b) along the axial direction blunt edges (8) of at least 120 ° or changes in direction of the surface tangent (d or e) of at most 60 °.
Vorzugsweise hat das Schneidwerkzeug einen Stössel, der sich durch eine Stösselöffnung des Grundkörpers hindurch erstreckt und/oder in diesem gelagert ist, und der im Innern des prismenförmigen Hohlkörpers axial hin und her bewegbar ist, so dass im Innern des Hohlkörpers enthaltene ausgeschnittene Wandabschnitte aus dem Hohlkörper ausgestossen werden können.Preferably, the cutting tool has a plunger, which extends through a plunger opening of the base body and / or stored in this, and which is axially reciprocally movable inside the prism-shaped hollow body, so that contained in the interior of the hollow body cut wall portions of the hollow body can be ejected.
Besonders vorteilhaft ist es, wenn das Schneidwerkzeug zusätzlich zur Stirnöffnung eine Austrittsöffnung hat, so dass im Innern des prismenförmigen Hohlkörpers zuvor aufgenommene und ggfs. gestapelte ausgeschnittene Wandabschnitte über in den Hohlkörper später nachrückende ausgeschnittene Wandabschnitte ausgestossen werden können.It is particularly advantageous if the cutting tool has an outlet opening in addition to the end opening, so that inside the prism-shaped hollow body previously recorded and optionally stacked cut wall sections can be ejected via later cut-out cut-out sections in the hollow body.
Alternativ kann an der Austrittsöffnung auch eine Saugvorrichtung angeschlossen sein, so dass im Innern des Hohlkörpers enthaltene ausgeschnittene Wandabschnitte aus dem Hohlkörper abgesaugt werden können.Alternatively, a suction device can also be connected to the outlet opening, so that cut-out wall sections contained in the interior of the hollow body can be sucked out of the hollow body.
Der Verbindungsbereich des Schneidwerkzeugs kann einen Handgriff aufweisen. Insbesondere kann das Schneidwerkzeug eine zangenartige oder klammerartige Haltevorrichtung aufweisen, an deren erstem Schenkel der die Schneidkante aufweisende Grundkörper mittels seines Verbindungsbereichs befestigt ist, und an deren zweitem Schenkel der den dünnen Wandabschnitt aufweisende Behälter befestigbar ist, so dass durch eine Relativbewegung der beiden Schenkel die Schneidkante gegen den dünnwandigen Wandabschnitt und durch diesen hindurch gedrückt werden kann.The connecting portion of the cutting tool may include a handle. In particular, the cutting tool may have a pincer-like or clip-like holding device, on whose first leg the base body having the cutting edge is fastened by means of its connection region, and on whose second leg of the thin wall portion having container is fastened, so that by a relative movement of the two legs, the cutting edge can be pressed against the thin-walled wall portion and through it.
Der prismenförmige Hohlkörper kann in einem Teilbereich seiner Innenwand entlang seiner Axialrichtung einen erweiterten Querschnitt haben. In diesem axialen Bereich des Hohlkörpers können ausgeschnittene Abschnitte lose gestapelt werden, so dass nach einer gewissen Anzahl von Öffnungs- bzw. Ausschneidevorgängen das Ausstossen der in dem Hohlraum angesammelten Abschnitte ohne grossen Kraftaufwand erfolgen kann.The prism-shaped hollow body can have an expanded cross-section in a partial region of its inner wall along its axial direction. In this axial region of the hollow body, cut-out portions can be loosely stacked, so that after a certain number of opening or cutting operations, the ejection of the accumulated in the cavity sections can be done without much effort.
Weitere Vorteile, Merkmale und Anwendungsmöglichkeiten der Erfindung ergeben sich aus der nun folgenden Beschreibung bevorzugter Ausführungsbeispiele des erfindungsgemässen Schneidwerkzeugs anhand der Zeichnung, wobei:
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Fig. 1 eine Draufsicht auf ein erstes Ausführungsbeispiel des erfindungsgemässen Schneidwerkzeugs entlang seiner Längsachse L zeigt; -
Fig. 2 eine Seitenansicht des Ausführungsbeispiels derFig. 1 quer zu seiner Längsachse L zeigt; -
Fig. 3 eine vergrösserte Ansicht einer Einzelheit des erfindungsgemässen Schneidwerkzeugs im eingekreisten Bereich Z derFig. 1 zeigt; -
Fig. 4 eine Ansicht des erfindungsgemässen Schneidwerkzeugs entlang der Schnittebene X-X derFig. 1 ist; -
Fig. 5 eine Ansicht des erfindungsgemässen Schneidwerkzeugs entlang der Schnittebene Y-Y derFig. 1 ist; -
Fig. 6 eine Draufsicht auf einen ausgeschnittenen flächigen Abschnitt zeigt, der mit einem Schneidwerkzeug gemäss dem ersten Ausführungsbeispiel hergestellt wurde; -
Fig. 7 eine Draufsicht auf ein zweites Ausführungsbeispiel des erfindungsgemässen Schneidwerkzeugs entlang seiner Längsachse L zeigt; -
Fig. 8 eine Seitenansicht des Ausführungsbeispiels derFig. 7 quer zu seiner Längsachse L zeigt; -
Fig. 9 eine vergrösserte Ansicht einer Einzelheit des erfindungsgemässen Schneidwerkzeugs im eingekreisten Bereich Z derFig. 7 zeigt; -
Fig. 10 eine Ansicht des erfindungsgemässen Schneidwerkzeugs entlang der Schnittebene X-X derFig. 7 ist; -
Fig. 11 eine Ansicht des erfindungsgemässen Schneidwerkzeugs entlang der Schnittebene Y-Y derFig. 7 ist; und -
Fig. 12 eine Draufsicht auf einen ausgeschnittenen flächigen Abschnitt zeigt, der mit einem Schneidwerkzeug gemäss dem zweiten Ausführungsbeispiel hergestellt wurde.
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Fig. 1 shows a plan view of a first embodiment of the inventive cutting tool along its longitudinal axis L; -
Fig. 2 a side view of the embodiment ofFig. 1 transverse to its longitudinal axis L shows; -
Fig. 3 an enlarged view of a detail of the inventive cutting tool in the circled area Z ofFig. 1 shows; -
Fig. 4 a view of the inventive cutting tool along the cutting plane XX ofFig. 1 is; -
Fig. 5 a view of the inventive cutting tool along the cutting plane YY ofFig. 1 is; -
Fig. 6 shows a plan view of a cut-out flat portion, which was produced with a cutting tool according to the first embodiment; -
Fig. 7 shows a plan view of a second embodiment of the inventive cutting tool along its longitudinal axis L; -
Fig. 8 a side view of the embodiment ofFig. 7 transverse to its longitudinal axis L shows; -
Fig. 9 an enlarged view of a detail of the inventive cutting tool in the circled area Z ofFig. 7 shows; -
Fig. 10 a view of the inventive cutting tool along the cutting plane XX ofFig. 7 is; -
Fig. 11 a view of the inventive cutting tool along the cutting plane YY ofFig. 7 is; and -
Fig. 12 shows a plan view of a cut-out flat portion, which was prepared with a cutting tool according to the second embodiment.
In
In
Die Schneidkante 5 hat entlang ihrer Umfangsrichtung einen Verlauf mit unterschiedlichen axialen Positionen in Axialrichtung des prismenförmigen Hohlkörpers 3. Im vorliegenden Beispiel hat die Schneidkante 5 in vier Umfangsbereichen in Axialrichtung vorstehende Abschnitte 5a, 5b, 5c und 5d (siehe
Zwischen ihren vorstehenden Abschnitten 5a, 5b, 5c und 5d hat die Schneidkante 5 zurückgezogene Abschnitte 5e, 5f, 5g und 5h (siehe
Damit kann beim Abwärtsbewegen des Schneidwerkzeugs 1 gegen eine Dose der Deckel an der Dosen-Stirnfläche aufgeschnitten und letztendlich ausgeschnitten werden. An den vorstehenden Abschnitten 5a, 5b, 5c und 5d, bei denen es sich um abgerundete Spitzen handelt, wird der Dosendeckel zunächst angestochen. Beim anschliessenden weiteren Eindringen der Abschnitte 5e, 5f, 5g und 5h des Schneidwerkzeugs 1 in den Dosendeckel wird dieser vollständig ausgeschnitten und wird im Innern 11 des Hohlkörpers 3 durch die Mantelwand-Innenfläche 4a festgeklemmt.Thus, when moving the
In
In
Die axiale Länge b des Bereichs mit schrägem Verlauf 7a an den Vorschneidern 5a, 5b, 5c und 5d der Mantelwand-Innenfläche 4a ist kleiner als die maximale axiale Differenz a zwischen den verschiedenen vorstehenden axialen Positionen 5a, 5b, 5c, 5d und den verschiedenen zurückgezogenen axialen Positionen 5e, 5f, 5g, 5h der Schneidkante 5 entlang der Umfangsrichtung.The axial length b of the
In der Draufsicht der
Die stumpfen Winkel g und h (siehe
Das erfindungsgemässe Schneidwerkzeug 1 eignet sich zum Ausschneiden eines dünnwandigen Wandabschnitts aus einer Blechdose, wie z.B. einer Aluminium-Getränkedose, oder aus einem Polymerbehälter, wie z.B. einem Behälter aus Polyethylenterephthalat (PET), und zum Aufnehmen des ausgeschnittenen Wandabschnitts im Innern 11 des Schneidwerkzeugs 1.The
Speziell für die zylinderförmige Geometrie des dargestellten Ausführungsbeispiels kann auch gesagt werden, dass der durch die Schneidkanten-Positionen der Vorschneider 5a, 5b, 5c und 5d bestimmte grosse bzw. äussere Schneidekreis SKG an einer jeweiligen Zahnspitze (siehe
Dringt die Schneidkante 5 nun etwas tiefer in die Behälterwand ein, erfolgt eine definierte Verformung des ausgeschnitten Wandabschnitts an der Innenwand 4a des zylinderförmigen Hohlkörpers 3 sowie ggfs. auch ein Stauchen des ausgeschnittenen Wandabschnitts während seines Ausschneidens. Der ausgeschnittene Wandabschnitt wird dadurch auf reproduzierbare Art und Weise im Innern 11 des zylinderförmigen Hohlkörpers 3 festgeklemmt.If the
In
In
In
In den
In
Claims (15)
- Cutting tool (1, 1') for cutting out a flat section from a flat structure, in particular a thin-walled wall section out of a container, and for receiving the flat section or respectively the cut-out wall section in the cutting tool, the cutting tool (1) being formed by a base body (2) having at least in one portion a prism-shaped hollow body (3) with a prism-shaped jacket wall (4) whose leading edge is formed by a cutting edge (5; 5') extending along the circumferential direction of the prism-shaped hollow body (3) and bordering the front opening of the hollow body; and having a connecting region (6) for connecting the base body (2) to a drive means; whereby the leading edge of the prism-shaped jacket wall (4) formed as cutting edge (5; 5') has a course along the circumferential direction with different axial positions in axial direction of the prism-shaped hollow body (3), the leading edge provided with the cutting edge (5; 5') having in each of at least two cutting edge circumferential regions a cutting edge section (5a, 5b, 5c, 5d; 5a', 5b', 5c', 5d') protruding along the axial direction, on whose inner side the prism-shaped jacket wall-inner surface (4a) has a recess (7a; 7a'), which borders on the respective protruding cutting edge section (5a, 5b, 5c, 5d; 5a', 5b', 5c', 5d') of the cutting edge (5; 5'), characterised in that the cutting edge (5; 5') extends continuously along the entire circumferential direction of the prism-shaped hollow body (3); and that disposed between the axially protruding cutting edge sections (5a, 5b, 5c, 5d; 5a', 5b', 5c', 5d') serving as pre-cutter is in each case an axially set-back cutting edge section (5e, 5f, 5g, 5h) serving as post-cutter;
whereby a) the jacket wall inner surface (4a) has on the protruding cutting edge sections (5a, 5b, 5c, 5d) along the axial direction to the cutting edge a slanted course (7a), in which the radial distance Ri measured from a longitudinal axis L of the prism-shaped hollow body (3) increases to the cutting edge (5) along the axial direction from the longitudinal axis L to the jacket wall inner surface (4a); or b) the jacket wall inner surface (4a) has on the protruding cutting edge sections (5a', 5b', 5c', 5d') a recess (7a') in the shape of an annular groove, which does not border all the way to the tip of the respective protruding sections (5a', 5b', 5c', 5d'); and
whereby the jacket wall inner surface (4a) has on the set-back cutting edge sections (5e, 5f, 5g, 5h) no slanted course, in which the radial distance Ri measured from the longitudinal axis L of the prism-shaped hollow body (3) is constant along the axial direction from the longitudinal axis L to the jacket wall inner surface (4a). - Cutting tool according to claim 1, characterised in that the axial protruding cutting edge sections (5a, 5b, 5c, 5d; 5a', 5b', 5c', 5d') have rounded tips.
- Cutting tool according to claim 1 or 2, characterised in that the cutting edge (5) has at least in two circumferential regions in axial direction one protruding section (5a, 5b, 5c, 5d) each, on which the jacket wall inner surface (4a) has a slanted course (7a) along the axial direction to the cutting edge (5a, 5b, 5c, 5d), whereby the radial distance (Ri) measured from a longitudinal axis (L) of the prism-shaped hollow body (3) to the jacket wall inner surface (4a) increases to the cutting edge (5) along the axial direction.
- Cutting tool according to claim 3, characterised in that the jacket wall inner surface (4a) has the course (7a) slanted to the cutting edge (5) only in the circumferential regions with the respective protruding cutting edge sections (5a, 5b, 5c, 5d).
- Cutting tool according to claim 3 or 4, characterised in that the slanted course (7a) of the jacket wall inner surface (4a) is formed by a flat grinding or by a curved grinding.
- Cutting tool according to one of the claims 1 to 5, characterised in that the jacket wall outer surface (4b) along the axial direction to the cutting edge (5) has a slanted course (7b), the radial distance (Ra) measured from a longitudinal axis (L) of the prism-shaped hollow body (3) to the jacket wall outer surface (4b) decreasing to the cutting edge (5) along the axial direction.
- Cutting tool according to one of the claims 1 to 6, characterised in that the circumferential regions with the sections (5a, 5b, 5c, 5d) protruding in axial direction are evenly distributed along the circumferential direction.
- Cutting tool according to one of the claims 1 to 7, characterised in that the prism-shaped hollow body (3) has a circular, oval or polygonal cross section.
- Cutting tool according to one of the claims 1 to 8, characterised in that the prism-shaped jacket wall (4) at least in the region of its cutting edge (5) consists of steel, ceramic material or carbide.
- Cutting tool according to one of the claims 1 to 9, characterised in that the axial length (b) of the region with the recess (7a; 7a') on the jacket wall inner surface (4a) in the protruding sections (5a, 5b, 5c, 5d) is smaller than the maximal difference (a) of the different axial positions of the cutting edge (5) along the circumferential direction.
- Cutting tool according to one of the claims 1 to 10, characterised in that the jacket wall inner surface (4a) of the prism-shaped hollow body (3) has at least in an axial portion of the inner surface a microscopically rough surface and/or macroscopic protrusions.
- Cutting tool according to one of the claims 1 to 11, characterised in that the surface profile of the jacket wall inner surface (4a) and the surface profile of the jacket wall outer surface (4b) along the axial direction has <sic. have> obtuse edges (8) of at least 120° or respectively directional changes of the surface tangents (d or respectively e) of at most 60°.
- Cutting tool according to one of the claims 1 to 12, characterised in that it has a push rod which extends through a push rod opening (10) of the base body (2) and/or is borne therein, and which is axially movable back and forth in the interior of the prism-shaped hollow body (3), so that cut-out wall sections contained in the interior (11) of the hollow body (3) are able to be expelled out of the hollow body.
- Cutting tool according to one of the claims 1 to 13, characterised in that in addition to a front opening there is an outlet opening so that cut-out wall sections previously received, and possibly stacked, in the interior (11) of the prism-shaped hollow body (3) are able to be expelled over cut-out wall sections moving into the hollow body later.
- Cutting tool according to one of the claims 1 to 14, characterised in that the prism-shaped hollow body has an expanded cross section in a portion (4c) of its inner wall along its axial direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20100745216 EP2473434B1 (en) | 2009-09-01 | 2010-08-17 | Cutting tool |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09169165 | 2009-09-01 | ||
EP09170205A EP2289837A1 (en) | 2009-09-01 | 2009-09-14 | Cutting tool |
EP20100745216 EP2473434B1 (en) | 2009-09-01 | 2010-08-17 | Cutting tool |
PCT/EP2010/061969 WO2011026729A1 (en) | 2009-09-01 | 2010-08-17 | Cutting tool |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2473434A1 EP2473434A1 (en) | 2012-07-11 |
EP2473434B1 true EP2473434B1 (en) | 2015-04-29 |
Family
ID=41376310
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09170205A Withdrawn EP2289837A1 (en) | 2009-09-01 | 2009-09-14 | Cutting tool |
EP20100745216 Not-in-force EP2473434B1 (en) | 2009-09-01 | 2010-08-17 | Cutting tool |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09170205A Withdrawn EP2289837A1 (en) | 2009-09-01 | 2009-09-14 | Cutting tool |
Country Status (5)
Country | Link |
---|---|
US (1) | US8656599B2 (en) |
EP (2) | EP2289837A1 (en) |
CN (1) | CN102639430A (en) |
ES (1) | ES2543096T3 (en) |
WO (1) | WO2011026729A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9054218B2 (en) | 2013-08-07 | 2015-06-09 | International Business Machines Corporation | Method of manufacturing a FinFET device using a sacrificial epitaxy region for improved fin merge and FinFET device formed by same |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1789729A (en) * | 1926-10-13 | 1931-01-20 | Continental Can Co | Can-end-cutting device |
US2095660A (en) * | 1936-08-10 | 1937-10-12 | George W Dooley | Can opener |
US3111995A (en) * | 1960-09-06 | 1963-11-26 | Hendrick C Dahl | Sprinkler head trimmer |
US3171200A (en) * | 1962-09-26 | 1965-03-02 | Reginald J Poppenga | Carpet repair tool |
US3786564A (en) * | 1972-10-19 | 1974-01-22 | M Acheson | Carpet plug cutter |
US3874078A (en) * | 1972-10-27 | 1975-04-01 | Fmc Corp | Can opener with helically mounted blade |
US3821850A (en) * | 1972-12-20 | 1974-07-02 | Blum Inc | Can opener |
GB2071600A (en) * | 1980-03-19 | 1981-09-23 | British Nuclear Fuels Ltd | Container-cutting device |
US5429022A (en) * | 1992-04-28 | 1995-07-04 | Mitsubishi Yuka Bio-Clinical Laboratories, Inc. | Opening machine for film seal cap |
GB9211497D0 (en) * | 1992-05-30 | 1992-07-15 | Rigby Michael E | Tool for opening a container |
US5461788A (en) * | 1994-09-08 | 1995-10-31 | Taylor; Jack | Grass trimming device for pop-up sprinklers |
GB2305655B (en) * | 1995-09-27 | 1999-05-05 | Francis Clark | Opening device |
US6854524B1 (en) * | 2003-02-21 | 2005-02-15 | Rudolph C. Williams | Tools and methods to trim excess vegetation from growing plants |
-
2009
- 2009-09-14 EP EP09170205A patent/EP2289837A1/en not_active Withdrawn
-
2010
- 2010-08-17 EP EP20100745216 patent/EP2473434B1/en not_active Not-in-force
- 2010-08-17 US US13/393,731 patent/US8656599B2/en not_active Expired - Fee Related
- 2010-08-17 WO PCT/EP2010/061969 patent/WO2011026729A1/en active Application Filing
- 2010-08-17 ES ES10745216.1T patent/ES2543096T3/en active Active
- 2010-08-17 CN CN2010800386859A patent/CN102639430A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2011026729A1 (en) | 2011-03-10 |
US20120227272A1 (en) | 2012-09-13 |
CN102639430A (en) | 2012-08-15 |
EP2473434A1 (en) | 2012-07-11 |
EP2289837A1 (en) | 2011-03-02 |
ES2543096T3 (en) | 2015-08-14 |
US8656599B2 (en) | 2014-02-25 |
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