WO2019042582A1

WO2019042582A1 - Technology for punching small punched parts

Info

Publication number: WO2019042582A1
Application number: PCT/EP2018/000421
Authority: WO
Inventors: Gunther Leontiev; Sascha Wormser
Original assignee: Karl Marbach Gmbh & Co. Kg
Priority date: 2017-08-30
Filing date: 2018-08-30
Publication date: 2019-03-07
Also published as: DE102017119918A1

Abstract

A punching element (150) for punching small punched parts out of a sheet is provided. The punching element (150) comprises a main body (152), which has, on its end side (153) facing the sheet, a punching line (154) and an opening (156) enclosed by the punching line (154), wherein the opening (156) is connected to an extraction shaft (158) that extends through the main body (152) of the punching element (150), and wherein the main body (152) is able to be integrated into a punching plate (120) of a punching tool (100). Furthermore, a punching tool (100) accommodating the punching element (150), and a method for punching panels out of a sheet with the aid of the punching tool are provided.

Description

TECHNIQUE FOR PUNCHING SMALL PUNCHING PARTS Description Prior art

The present invention relates generally to the field of punching. Specifically, the invention relates to a technique for punching small or small punched parts from a sheet.

background

Flatbed punching machines are used in the packaging industry for the production of

Cardboard boxes or cartons made of cardboard, corrugated cardboard or other materials used for a long time. With flat bed stamping machines today, packages of different sizes and characteristics can be produced in large numbers and inexpensively. Examples of packages that are produced in large quantities are folding boxes for the cosmetics or pharmaceutical industry or

Cigarette.

Flatbed punching machines for punching out packages of sheets of cardboard, corrugated cardboard or other material have the following structure. They comprise a lower press pot and an upper press pot and at least one lifting device which is provided for actuating the lower and / or upper press pans. The press pans are provided for receiving a punching tool. The punching tool usually comprises a punching plate, which is designed for punching and / or grooving a sheet, as well as one of the punching plate arranged opposite one another

Counter-punching plate, on which rests a sheet to be punched. The punching plate consists of a support plate (for example, a wooden plate), in which slots for receiving punching lines and / or score lines (eg made of strip steel) are formed. During a punching operation, the two press jaws and thus the punching plate and the counter-punching plate arranged between the two press jaws are moved towards one another until the punching lines of the punching plate strike the counter-punching plate. The resulting punching pressure causes the on the Counter punch plate arranged sheet is severed along the punching lines and grooved along the score line.

The so punched from the sheet and grooved packaging (also called benefits) are still connected via breakpoints with the bow. In a subsequent

Break-out process in a break-out station sheet waste parts are removed After this breaking process, the benefits are separated in a further process step - the Nutzentrennen. In the production of glued packaging, the separated benefits are treated at predefined locations with adhesive. The gluing takes place in one

Gluing machine instead. For the gluing process, it is a hindrance if residues or waste parts from one of the previous process steps (punching, breaking, blanking) are present on the adhesive to be glued.

Particular challenges arise in this context in the punching of small or very small parts. With small or very small parts are auszustanzende here

Recesses at intended places of the benefit meant, whose dimensions in each surface dimension (thus length, width or diameter of the recess) in the

Millimeter range or at most in the range of a few centimeters. such

Recesses may have any contours and may be used as graphical elements, e.g. for displaying company logos or other symbols, on a carton for

Use come. In the following, small or very small parts to be punched out are referred to as "small parts" for short.

For a reliable breaking out of the above-mentioned Kleinstanzteile conventional stripping stations are usually not designed. A residue-free removal of

Kleinstanzteilen of the benefits is not possible in the conventional way. To circumvent the problem, the recesses to be realized in the folding boxes are cut out in a separate operation, such as by laser cutting. This extra step adds value to the manufacturing process and increases its manufacturing cost. The object of the present invention is to provide a technique which enables reliable stamping of small parts from the stamped benefits. Furthermore, the process of punching of Kleinstanzteilen in a conventional

Flatbed punching process to be integrated.

Brief outline of the invention

To achieve the above object and other objects, according to a first aspect, a punching element for punching Kleinstanzteile from a sheet

provided. The punching element comprises a base body which has at least one punched line and at least one opening on its end facing the sheet, wherein in each case a punching line is associated with an opening. The opening is in communication with a suction duct which extends through the main body of the punching element. The main body is designed for integration in a punching plate.

The sheet to be punched can, depending on the use of punched out benefits

various materials, in particular made of lightweight paper, cardboard, solid board, corrugated cardboard or plastic. The thickness and stiffness of the bow can vary as needed.

In the context of the present invention, the term "small dance parts" is to be understood as parts to be punched out of the sheet or a utility whose area dimensions (length and width dimensions or diameter) are in the millimeter range or in the range of a few centimeters Stamped parts referred to, which are completely punched out of the sheet. The punching of such Kleinstanzteile can serve as the creation of recesses in the sheet or a benefit, for example. Such recesses may take the form of

Letters, numbers or other symbols or design elements. For example, one or more such recesses may represent an element of a company logo on a package. Each punching line arranged on the end face of the punching element can be designed such that it forms a closed cutting line in the circumferential direction (that is to say perpendicular to the punching direction). The closed in the circumferential direction formed cutting line thus allows complete punching a Kleinstanzteils from the sheet. Further, by each projecting from the end face and closed in the circumferential direction punching line defines a receiving area, which is located within the punching line and is provided for receiving the punched Kleintanzteile. Each punching line arranged on the end face of the punching element can be shaped and dimensioned in the circumferential direction in such a way that it reproduces the desired contour of the small punched part to be punched out. Thus, each of the punching line arranged on the end face is designed for punching out a small dance part.

The opening associated with each punching line may be disposed on the end face of the punching element so as to be within the space through the closed punching line

enclosed end face lies. In this way, that of the punching line

associated opening in the circumferential direction of the closed punching line completely surrounded. According to a preferred variant, the contour of the opening can correspond to the contour of the cutting line. In other words, the opening may have (substantially) the same cross-sectional area and contour as the end face enclosed by the closed cutting line. Thus, the receiving area defined by the closed stamping line can smoothly pass into the opening. This can be a

Jamming the Kleinstanzteile be prevented when passing through the opening. The punching line may have a cutting slope on its outer side. The cutting slope can give the punching line stability and contribute to dimensional stability of the punching line contour. It is also conceivable, however, a punching line without bevelled outside. By chamfering the punching lines on its outer side, the life of the cutting lines can be further increased and a consistent quality of Ausstanzergebnisses over many

Punching cycles are achieved. Each punching line can also be designed such that it receives the small dance parts of several successive punching cycles and leads to the opening. To achieve this, the inner sides of each punching line may be formed substantially perpendicular to the end face of the punching element. In other words, the inner sides of each punching line can (essentially) run parallel to the punching direction. Likewise, the opening adjoining the punching line may have inner walls extending substantially perpendicular to the end face. The opening on the front side thus forms an extension of the receiving area enclosed by the stamping line. Each of the stamped line punched and received Kleinstanzteil can thus with each new punching cycle successively along the inner sides of the punching line in the direction of the opening are passed until it passes through the opening and enters or falls into the suction chute. The receiving area of the punching line projecting from the end face of the punching element can widen on its inside from the cutting edge to the opening.

Depending on the implementation, the punching element may have on the front side a plurality of closed punched lines and correspondingly a plurality of openings, one opening in each case being associated with a punching element. Each of the multiple openings may be in communication with the exhaust duct. Depending on the implementation, the multiple punched lines and the associated openings may have the same contours or different contours. Each punching line and associated opening may be arranged at a predetermined position on the end face of the punching element.

The suction duct may have at least two open ends. The at least two open ends may include a first open end associated with each opening of the

Punching element is in communication, as well as a second open end, which opens in a different side from the end face of the body of the body. One of the at least one punched line punched and through the associated opening

passing through Kleinstanzteil can be passed by means of the suction duct from the first open end to the second open end of the suction duct. If the base body of the punching element is integrated in a punching plate, the extraction shaft can be part of an exhaust system. The exhaust system is designed to extract the small dance parts passing through each of the openings. For that, the

Suction duct at its second open end to a suction, which is also part of the exhaust system to be connected.

Depending on the implementation, the suction duct may also have a third open end. In this case, by the first open end turn Kleinstanzteile enter the suction duct. The second and third open ends of the exhaust duct may be arranged on opposite sides of the stamping element. For example, the suction chute can run parallel to the end face of the punching element through the punching element, so that a T-shape of the suction chute in the main body of the

Punching element results. If the punching element is integrated in a punching plate, the suction duct can form an intermediate piece of a suction duct, over which the punched-out small dance parts are sucked off.

The suction duct may have a cross-section which is larger than the cross-sectional area (end face) of each opening. Thus, the Kleinstanzteile can freely in the

Move the suction duct and suck it off.

The suction duct formed in the punching element can also be coated. The

Coating may contribute to the reduction of friction and / or electrostatic charge between the micro dance pieces and the walls of the exhaust duct. When

Coating agent may use an agent (e.g., varnish) that reduces stiction and / or electrostatic charge between the microdissections and interior walls of the exhaust duct.

The main body of the punching element may have a cuboid shape, wherein one of the rectangular surfaces is the end face of the main body. Alternatively, the base body may have a cylindrical shape with one of the two base surfaces as an end face. Are conceivable but also other forms with polygonal end face (eg triangular end face). Furthermore, the base body may be formed of a metal, a metal alloy, a plastic, a ceramic or any other suitable material. According to a variant of the base body may be constructed of steel.

The punching element may be a solid casting. Correspondingly, each punching line can be designed in the form of a sharp-edged elevation on the end face of the main body.

Alternatively, the punching line may be a component which is different from the basic body and which is attached to the end face of the basic body at a location provided for this purpose.

In the event that the punching element is formed as a solid casting, the suction shaft can be generated by a corresponding Gussformgeometrie by prototyping (casting) of the main body in the punching element. Alternatively, the extraction shaft can be drilled or milled from the full base body. Accordingly, the suction duct may have a circular, rectangular or otherwise formed cross-section.

The punching element can be designed such that it comprises a deflecting element arranged in the extraction shaft. The deflecting element can be designed to direct the small dance parts entering the first open end of the exhaust duct to the second open end of the exhaust duct. Furthermore, the deflection element can be designed such that it favors a separation of juxtaposed Kleintanzteile when the Kleinstanzteile come into contact with the deflection. Thus, it can be prevented that Kleinstanzteile get stuck in the exhaust duct or even wedged. To solve the problems mentioned above, a punching tool for punching benefits from a sheet is further provided. The punching tool has at least one punching plate which has on its side facing the sheet at least one punching line for punching out of the sheet. Furthermore, the punching plate has on its side facing the sheet at least one recess into which at least one of the punching elements described above can be received. In addition, the punching plate at least a suction channel, which is coupled to the suction duct of the at least one punching element.

The punching plate may have a plurality of punched lines. These can be used for

simultaneous punching a variety of benefits can be arranged on the punching plate. In addition to the punching lines, the punching plate may also have scoring lines for scoring the sheet or the benefits to be punched out. By use is meant the parts stamped from the sheet that can be folded into packages (cartons). The at least one recess can for precisely fitting receiving a respective

Punching be provided. In other words, the recess can be adapted to the shape and dimensions of the main body of the punching element to be used. Since the small parts to be punched out are (essentially) two-dimensional (i.e., flat) objects with dimensions in the millimeter range or in the range less

Centimeters, the expansion of the body along the front side edges (and perpendicular to the front side) can be in the range of a few centimeters. Accordingly, the recess may be sized.

The at least one recess may be arranged with respect to the punching lines of the punching tool such that the cutting lines of the punching element inserted in the recess (or the cutting lines of the punching elements inserted in the recesses) form a common punched profile together with the cutting lines of the punching plate. With a

Stamping process can thus be punched out of the benefits of the benefits of the bow and at the same time arranged within the utility Kleinstanzteile.

According to a variant, each punching element may be received in the recess provided therefor of the punching plate such that the punching lines of the punching tool and the at least one punching line of each received punching element lie substantially in one plane. This means that the punching lines of the punching tool and the

Punching lines of the punching element (approximately) equidistant from the punching plate front side

protrude. Depending on the tool setting and the geometry of the die-cut benefits, the punching lines of the punching tool and the at least one punching line of the punching element can protrude at different distances from the tool surface. For example, it may be desired that the punching line (s) of the punching element be slightly further from the

Stanzplattenstirnseite protrude than the stamping plate arranged on the punching lines. Such a tooling configuration may help to ensure complete removal of the small dance parts from the sheet or from the die cut benefits by the stamping element.

The at least one suction channel can run through the at least one punching plate and / or a first carrier device, into which the punching plate can be received. Further, the at least one suction channel with each realized in the punching plate recess

be pneumatically coupled. According to a variant, the at least one suction channel can be arranged in the interior of the punching plate. The at least one suction channel arranged in the interior can run essentially parallel with respect to the front side and rear side of the punching plate. Alternatively, it is also conceivable that the at least one suction channel is arranged on the rear side of the punching plate. Regardless of the specific arrangement of the at least one suction channel, this can be realized such that the suction channel is pneumatically coupled at each recess to the suction shaft of the punching element inserted into the recess. The suction channel can thus form an exhaust system together with the suction duct of the at least one punching element.

Depending on the implementation of the at least one suction channel centrally through the

at least one recess in the punching plate run. If the suction duct runs centrally through the at least one recess, a punching element with a T-shaped profile of the suction duct can form an intermediate piece of the suction duct. Alternatively, the suction channel also decentralized with respect to the recess, ie the recess laterally coupling run. The at least one suction channel may each have one or more open ends. At a first open end of the suction channel may be formed so that it can be connected to a suction device. In addition, the suction channel may have a second open end. The second open end of the suction channel can be designed such that a compressed air supply device can be connected thereto.

Analogous to the suction duct of the at least one punching element, the inner walls of the suction duct can be coated. Thus, the sliding friction occurring between the Kleinstanzteilen and the inner walls of the suction when removing the Kleintanzteile by the suction channels can be reduced, whereby a lower suction force must be built in the suction.

Each punched element accommodated in a recess can be fastened to the punching plate itself or to a carrier device of the punching plate. The punching element may for this purpose have a corresponding fastening device.

The punching tool may further comprise a counter-punching plate which cooperates with the punching plate and the at least one punching element received therein during a punching operation. The counter-punching plate can here be formed slightly elastically deformable. Alternatively, the punching plate can also be made of a

Substantially unyielding material, such as e.g. Steel, be built up. The one at

Stamping operation in the elastically deformable counter-punch plate constructed elastic counter-pressure can help that a punched Kleinstanzteil is pressed a little way in the space enclosed by the punching line receiving area or in the opening of the punching element.

Alternatively or additionally, the counter-punching plate may have at least one recess on its end face facing the punching plate (ie on the side on which the sheet to be punched rests during a punching process). The at least one recess may be formed as a groove. The recess may have a linear course on the front side of the Have counter punch plate. The linear course of the at least one recess may correspond to the profile of at least one punching line of the punching plate and / or at least one punched element received in the punching plate. Thus, the at least one recess for receiving at least one punching line can be designed during a stamping process. The bottom of the recess (eg the groove bottom) serves as a punching pad for the intersecting punching line.

To solve the above-mentioned object is also a punching device

provided. The punching device comprises the punching tool described above, as well as a suction device, which is coupled to the suction channel of the punching tool.

The punching device may further comprise the first support means for releasably securing the punching plate to the at least one punching element on the punching device. Also, the punching device may comprise a second support means for releasably securing the counter-punching plate. According to a variant, the punching element may be fastened directly to the first carrier device. According to an alternative variant, a

Carrier element to be attached to the punching plate, which in turn at the first

Carrier device is attached. The first support means may be formed frame-shaped. The second support device may also be designed frame-shaped.

The punching device may further comprise at least one lifting device, which is provided to press the punching plate against the counter-punching plate in a punching operation. If the suction channel has only one open end, this open end can be pneumatically coupled to the suction device. The suction device may be designed to generate a suction effect (by building up a negative pressure) in the suction channel, and thus to suck off the small punched parts punched out by the at least one punching element via the suction channel. According to a variant of the suction channel next to its first having the suction connected to the open end also have a second open end.

The punching device may further comprise a compressed air supply device. This can be pneumatically coupled to the second open end of the at least one suction channel. The compressed air supply device may be designed to control an air flow in the

To produce suction channel to carry away the Kleinstanzteile. The one by the

Compressed air supply introduced air flow can be pulsed or continuous. It is understood that the suction device and the compressed air supply device can be used synchronously or separately. When used synchronously, the volume of air introduced into the suction channel at the second open end may be approximately equal to the volume of air extracted at the first open end.

Further provided is a method of punching benefits from a sheet. The method is carried out with the aid of the punching device described above, wherein the punching device comprises the punching tool described above. The method comprises the following method steps: placing the sheet on a counter-punching plate opposite the punching tool; Moving the punching tool in the direction of the counter-punching plate, wherein the sheet is clamped between the punching tool and the counter-punching plate and the benefits are punched out by the punching lines of the punching tool; simultaneous punching of at least one Kleinstanzteils using the at least one punching element; and sucking off the at least one stamped Kleinstanzteils on the suction duct of the at least one punching element. By the method can be realized in an advantageous manner in one step, the punching of benefits and the punching of Kleinstanzteilen from the respective benefits. Brief description of the figures

With reference to drawings, aspects of the present invention will be further explained. Show it:

Fig. La is a schematic representation of a punching tool according to the invention with a punching element;

Fig. Lb is a sectional view taken along the sectional surface A-A of Fig. La shown

Punching tool, wherein the punching element is located outside of the punching tool;

Fig. Lc is a further sectional view along the sectional area A-A of Fig. La

illustrated punching tool, wherein the punching element is inserted into the punching tool;

Fig. 2a is a schematic representation of a punching element according to the invention;

FIG. 2b is a side view of the punching element shown in FIG. 2a; FIG.

Fig. 2c is a sectional view along the sectional area A-A of Fig. 2b shown

Punch member;

Fig. 2d is an enlarged cross-sectional view of the punching edge (i.e., cutting edge of the

Cutting line) of the punching element shown in Figure 2a;

Fig. 3a is a schematic representation of another invention

Punching tool with a punching element; FIG. 3b shows a sectional view along the sectional area AA of the punching tool illustrated in FIG. 3a; FIG.

Fig. 3c is a sectional view taken along the sectional surface B-B of Fig. 3a shown

Punching tool;

FIG. 4 is a flowchart of a method of punching a sheet from a sheet by means of the one shown in FIGS. 1 a to 1 c and 3 a to 3 c, respectively

Punching tool; such as

FIGS. 5a-5i are schematic illustrations of the punching element during a

Ausstanzprozesses.

Detailed description

With reference to the figures la to lc a punching tool 100 according to the invention will now be described in more detail. FIG. 1 a shows a top view of the punching tool 100, while FIGS. 1 b and 1 c show side views of the punching tool 100.

The punching tool 100 comprises at least one punching plate 120 which can be mounted on a first carrier device of a punching device (not shown). Furthermore, the punching tool 100 comprises at least one punching element 150, which can be integrated into the punching plate 120. The punching element 150 is provided for punching out small parts, as will be described in more detail below.

The punching plate 120 has stamped lines 130 on its end face, which faces a sheet to be punched. In addition, the punching plate 120 has score lines 135. The score lines 135 are shown in FIG. 1a in the form of dotted lines. Optionally, gummings may be provided on the punching plate 120 flanking the punching lines on both sides (not shown). The punching lines 130 arranged on the front side of the punching plate 120 are intended to cut through the sheet at points provided for this purpose. The Creasing lines 135 are also provided to score the sheet at designated locations. The punching and creasing lines 130, 135 described here can be in the form of

Strip steel lines may be formed, which are insertable at the end face of the punching plate 120 at predefined slots and protrude by a predetermined distance from the end face of the punching plate 120.

The punching plate 120 further comprises at least one recess 140 into which the at least one punching element 150 can be received. The recess 140 is disposed within the benefit replicating score lines 130 at the position where the micro dance pieces are to be punched out. Figure lb shows the punching element 150 outside the

Punching tool, so with free recess 140. Figure lc shows the punching plate 120, wherein the punching element 150 is received in the recess 140 of the punching plate 120.

Furthermore, the punching plate 120 comprises a suction channel 160. The suction channel 160 extends through the punching plate 120 within the punching plate 120. The suction channel 160 may in this case run in the interior of the punching plate 120 and substantially parallel to the front side and rear side of the punching plate 120. Such a course of the suction channel 160 is shown in FIGS. 1 a to 1 c, the suction channel 160 being indicated by dashed lines in FIG. 1 a and the suction channel 160 being perpendicular to the plane of the drawing in the cross-sectional views of FIGS. As an alternative to the implementation shown in FIGS. 1 a to 1 c, it is also conceivable that the suction channel runs on the rear side of the punching plate 120.

The suction channel 160 shown in Figures la to lc is realized as a cavity (for example, realized as a bore) in the interior of the punching plate 160. The suction channel 160 extends transversely through the punching plate 160 and terminates at opposite side edges of the punching plate 160. At the side edges of the punching plate 160 is the suction channel 160 in communication with a pneumatic suction device (not shown in the figures), which for generating a negative pressure (and thus a suction force) is provided in the suction channel 160. The

For this purpose, suction device can be pneumatically coupled to the suction channel 160 via supply lines (not shown in the figures). Optionally, in the supply lines valves be arranged, which are provided for setting a desired suction in the suction channel 160. Inside the punching plate 160, the suction channel 160 is in communication with the at least one recess 140 of the punching plate 120. The suction device may be pneumatically coupled to the suction channel 160 at a first open end 162 of the suction channel 160. At a second open end 164 of the suction channel 160, ambient air can be supplied to the suction channel 160 to support suction in the suction channel 160. This creates an air flow in the suction channel 160 in the direction of the first open end 162 to which the suction device is connected. If the punched-out small dance parts enter the suction channel, they are detected by the air stream and transported away in the direction of the suction device (or in the direction of the first open end 162). Depending on the application, a compressed air supply device can be connected to the second open end 164 of the suction channel 160 to reinforce the air flow. Through synchronous use of

Extraction means at the first open end 162 and the compressed air supply means at the second open end 164 of the suction channel 160, the air flow and thus the suction required for the removal of the punched Kleintanzteile suction can be increased. It is understood that only the compressed air supply device (without suction device at the other open end of the suction channel) can be used to generate the air flow.

The recess 140 formed in the end face of the punching plate 120 is cuboid and has a lateral opening to the suction channel 160. The recess 140 extends over the entire thickness of the punching plate 120, so that the punching element 150 can be inserted in the back of the punching plate. The recess 140 is such

dimensioned such that the punching element 150 can be inserted accurately into the recess 140 (see FIG. 1c). For this purpose, the punching element 150 has a cuboid base body. Furthermore, the recess 140 on the rear side of the punching plate 120 forms lateral grooves 172a and 172b in the punching plate 120 (see Figures 1 b and 1 c). The grooves 172a and 172b are for receiving respective ribs 170a and 170b at the rear of the punching member 150, respectively designed. In this way, the punching element 150 can be inserted and held in the punching plate 120. The punching element 150 may instead of the one described here

parallelepiped basic body also an otherwise shaped base body (e.g.

Cylinder body). The recess 140 is the shape of the main body of the

Stamped element 150 formed adapted accordingly.

The punching element 150 comprises a suction duct 158, at least one with the

Suction shaft 158 coupled and on the front side 153 of the punching element 150th

arranged opening 156 (passage opening) and at least one arranged on the end face 153 of the punching element 150 punching line 154. With end face 153 in this case that side of the punching element 150 is meant, which faces the punched sheet during a punching process.

The suction duct 158 is formed inside the main body of the punching element 150. The suction duct 158 is formed in the main body of the punching element 150 such that it is coupled with its first open end 158a to the at least one opening 156 arranged on the end side 153 and is coupled to the suction duct 160 with its second open end 158b when the punching element 150 is received in the recess 140. The suction duct 158 thus forms, together with the suction channel 160, an extraction system which can be coupled to a pneumatic suction device and is provided for the extraction of punched-out small parts.

The punching element 150 shown in FIGS. 1 a to 1 c has on its end facing the sheet at least one punching line 154 which protrudes from the front side 154. In the implementation shown in FIG. 1a, three punched lines 154 are arranged at a distance from one another. It is understood that the number of punch lines 154 may vary depending on the application. Each of the punching lines 154 has a closed contour in the circumferential direction. Each of the closed punched lines 154 thus defines a receiving area 157 located inside (ie inside the punching line) and intended for receiving the punched-out small dance parts (as can be seen in FIG. 2c). The recording area 157 has a cross-sectional area which in shape and extent those of

punched out Kleinstanzteile corresponds.

Each closed punch line 154 is further associated with an opening 156. Each of the openings 156 is disposed on the front side and within the closed die line 154. It forms a passage between the receiving area 157 and the suction duct 140. The shape and extent of the opening cross-section correspond (substantially) to the shape and extent of the cross-sectional area of the receiving area 157. As a result, a stepless transition from the receiving area 157 into the opening 156 is realized. Thus, the recorded in the receiving area 157 and in

Direction of the opening moving small dance parts pass without significant resistance through the opening 156 to enter the exhaust duct 158. According to a variant, the cross-sectional area of the receiving area 157 may also be smaller than that of the opening 156. In this case, the punching line 154 may expand on its inner side (see Figures 2c and 2d) to the end face 153 of the punching element 150. Due to the widening of the punching line 154 on its inner side, a stepless transition from the receiving region 157 into the opening 156 can also be ensured in this case.

The punched lines 154 and openings 156 shown in FIGS. 1 a to 1 c have a slot-like contour. The invention is not limited to this form. Depending on the shape of the parts to be punched, the punched lines 154 (and associated apertures 156) may take any two-dimensional shape.

As further shown in FIGS. 1b and 1c, the punching lines 130 of the punching plate 120 and the punching lines 154 of the punching element 150 inserted into the punching plate 120 project approximately the same amount from the punching plate face. Thus form the

Punching lines 130 of the punching plate 120 and the punching lines 154 of the punching element 150 inserted in the punching plate 120 have a common punching plane of the punching tool 100. It should be noted at this point that the illustrations in FIGS. 1 a to 1 c merely show a section of a punching tool 100 according to the invention for better illustration of the invention. In particular, the punching plate 120 shows only a received punching element 150 as well as punching lines and score lines for punching a benefit. In practice, the punch plate 120 may be sized such that the punch plate 120 receives punching and creasing lines and punching elements 150 for punching out a variety of uses. Accordingly, the punching plate 120 has a plurality of recesses 140 for receiving a plurality of punching elements 150. Depending on the number and arrangement of the recesses 140 on the punching plate 120, a plurality of suction channels 160 may be formed in the punching plate 120.

The punching element 150 shown in FIGS. 1a to 1c will be further described with reference to FIGS. 2a to 2d. Each of the punching lines 154 is formed circumferentially closed and surrounds one of three arranged on the front side of the punching element 150 openings 156. Each of the openings 156 is connected to a first open end 158a of the

Suction shaft 158 is connected, which extends through the main body 152 of the punching element 150. The suction duct 158 further has a second open end 158b, which is arranged on an outer side of the main body 152 which is different from the end face and directed in the direction of the suction duct 160. In other words, it ends

Suction shaft 158 at its second open end 158 b on that outside of the

Base 152, which in a recess 140 of the punching plate 120th

Recorded state of the punching element 150 in the direction of the suction channel 160 shows.

Thus, in the punched plate 120 received in the punching plate 120 of the suction duct 158 opens laterally into the suction passage 160 of the punching plate 120 (as seen in Fig. Lb).

Each of the three punching lines 154 produces a closed punching contour which surrounds an area which corresponds to the surface of the small dance piece to be punched out. The punching line 154 will be further described in connection with FIGS. 2c and 2d. Like in enlarged cross-sectional profile in Fig. 2d is shown, each of the punching lines 154 has a tapered outer side 155b. The inside of the punching line 154 has three regions, namely a side region 155a directly adjoining the end side 153, a middle side region 155c and a side region 155d which opens toward the punch tip. The side portion 155a is inclined slightly outwardly toward the front side 153, while the middle portion 155c is formed substantially perpendicular to the end side 153. The side region 155d is in turn bevelled and, together with the tapered outer side 155b, forms the cutting edge at the tip of the punching line 154. The substantially parallel formed central side region 155c serves to secure

Picture of the stamped Kleinstanzteils. It prevents the Kleinstanzteil from falling out of the punching line and gets stuck on the benefits. The side region 155a which widens in the direction of the end face 153 enables a secure continuation of the small dance part in the direction of the opening 156. As a result, the defined by the punching line 154

Receiving area 157 widens in the side region 155a, a jamming of the stamped parts in the receiving area 157 is prevented. The Kleinstanzteile can thus be reliably sucked through the opening 156 and the suction shaft 140 of the punch 150.

As can also be seen from FIG. 2c, the receiving area 157 defined by the closed punching line 154 merges seamlessly into the opening 156 provided on the end face 153. In other words, the inner side region 155 a of the punching lines 154 merges seamlessly into the corresponding openings 156. The continuous transition between the punched lines 154 and the underlying openings 156 causes a smooth removal of the punched Kleintanzteile over the suction duct 140 and the associated suction channel 160th

The punching element 150 shown in FIGS. 2 a to 2 d furthermore comprises a in the

Suction shaft 158 arranged deflecting element 159. The deflecting element 159 is formed in the suction duct 158 as a slope. The deflecting element 159 has the task

To conduct small dance parts from the first open end 158a of the exhaust duct 158 to the second open end 158b of the exhaust duct 158. Furthermore, the deflecting element 159 serves the fanning of stacked and pressed together Kleinstanzteilen, as described in more detail below in connection with the figures 4a-4i.

Base 152 and punching lines 154 of the punching element 150 are each formed of steel. The punching lines 154 protrude as an elevation from the front side, wherein the height measured from the end face to the cutting line in the range of 1 to 5 mm, preferably in the range of 1 to 3 mm.

FIGS. 3a to 3c show a further implementation of a punching tool according to the invention. The punching tool 300 illustrated in FIGS. 3a to 3c differs from the punching tool 100 illustrated in FIGS. 1a to 1c in the positioning of the suction channel 360 relative to the recess 340, and in the embodiment of the extraction shaft 358 in the punching element 350. Elements of the punching tool 300, which correspond to those of the punch 100 in Figures la to lc, are provided in Figures 3a to 3c with the same reference numerals. A detailed description of functional and structural features of these elements is therefore omitted below and reference is made to the figures la to lc.

As can be seen with reference to FIG. 3 a, the suction channel 360 extends centrally through the

Recess 340 and thus by the inserted into the recess 340 punching element 350. In this case, the suction shaft 358, as shown in Figures 3b and 3c such

formed so that it parallel to the end face 153 of the punching element 350 through the

Punch 350 passes. According to the illustrated variant, the

Suction shaft 358 of the punching element 350 three open ends 358a, 358b and 358c on. At its first open end 358a, the exhaust duct 358 is pneumatically connected to each opening 156 of the punching element 350. At its second open end 358b and third open end 358c, the exhaust duct is in direct pneumatic communication with the exhaust duct 360 of the die plate 320. In other words, the

Suction shaft 358 of the punching element 350 an intermediate piece of the suction channel 360 in the region of the recess 340. The suction shaft 358 is thus directly with the suction channel 360 connected. In the figures la to lc, however, a less direct, namely lateral connection of the suction duct 158 is shown to the suction channel 160.

With reference to FIG. 4, a method 400 according to the invention for punching benefits from a sheet with the punching tool 100 described in FIGS. 1 a to 1 c is used

described.

According to the punching method 400 according to the invention, the punching tool 100 is first provided for punching the benefits from a sheet (step 410 in FIG. 4). In this case, the step of providing comprises the provision of the punching plate 120, which has stamped lines 130 and recesses 140 on its end face for receiving the above-described

Stamping elements 150 includes. The step of providing further comprises inserting the punching elements 150 into the recesses 140 of the punching plate 120 and fixing the

Punching elements 150 on the plate 120. The step of providing further includes the installation and alignment of the punching plate 120 and a suitable counter-punching plate in a punching device.

In a subsequent step (step 420 in FIG. 4), the sheet to be punched is placed on the counter-punching plate. The counter-punching plate is the punching plate 120 of the

Punching tool 100 opposite.

Subsequently, punch plate 120 and counter punch plate are moved towards each other (step 430 in Fig. 4). Here, the sheet is clamped between the two plates.

The plates are moved towards each other until the punching lines 130 of the

Punching tool 100, as well as the punching lines 154 of the integrated punching tool 100 in the punching element 150 have completely cut through the sheet and come into contact with the counter-punching plate. In this case, on the one hand, benefits are punched out of the sheet by means of the punching lines 130 of the punching tool (step 440 in FIG. 4). At the same time, at least one small dance part is integrated by means of the punching line 154 of the stamping tool 100 Punching element 150 punched out (step 450 in Fig. 4). The punching steps 440 and 450 thus take place substantially simultaneously.

The small punched part punched out with the punching element 120 is conveyed in the punching process itself in the direction of the extraction shaft of the punching element 120 and sucked from there via the suction channel 160 provided in the punching plate 120 (step 460 in FIG. 4).

The method 400 described above describes a punching cycle. This can be repeated as often as you like. In this case, the step 460 of sucking the Kleinstanzteile

take place continuously or cyclically.

It is understood that the method 400 described above instead of having a

Punching tool 100 according to the figures la to lc also with a punch 300 according to the figures 3a to 3c can be implemented.

With reference to the figures 5a to 5i is in connection with the method 400th

described punching step of Kleinstanzteilen further. For better illustration of the punching process of small dance parts, only the punching element 150 integrated in the punching tool 100 is shown in FIGS. 5a to 5i. The punching element 150 receiving the punching plate 120 is not shown. Likewise not shown is the

Counter punch plate on which the sheet 200 to be punched rests.

Shown are three punching cycles. Figures 5a to 5c show a first punching cycle, Figures 5d to 5f a subsequent second punching cycle and Figures 5g to 5i a

subsequent fifth punching cycle. The intermediate third and fourth punching cycle is not shown.

FIG. 5a shows a cross-section of the punching element 150 described in connection with the preceding figures and one under the punching element 150 Sheet 200. Fig. 5a shows the punching element 150 as it is lowered onto the sheet 200 (indicated by the arrow in Fig. 5a).

Fig. 5b shows the punching element 150 during the punching operation. The punching element 150 is lowered onto the sheet 200 and cuts with its punching line 154 the sheet 200. In this case, a Kleinstanzteil 220.1 is punched out of the sheet 200 using the punching line 154.

Fig. 5c shows the punching element 150 after the punching operation. The punching element 150 is lifted together with the punching plate 120. The punching element 150 thus moves away from the sheet 200 (see arrow in Fig. 5c). The punched out small dance piece 220.1 is clamped within the punching line (substantially between the parallel inner side portions 155c of the punching line 154 as shown in FIG. 2d). The

Punching element 150 thus takes with it the punched out of the sheet 200 Kleinstanzteil 220.1, so that a recess without residues on the sheet 200 remains.

Figures 5d to 5f show a subsequent second punching cycle, wherein in

Receiving portion 157 of the punching line 154 is the Kleinstanzteil 220.1 of the preceding first punching cycle. The punching element 150 is lowered onto a new sheet 200 to be punched, as shown in Fig. 5d (see Fig. 5d). The lowered

Punching element 150 cuts through the sheet 200 with its punching line 154 and thereby punches a small-size dance piece 220.2 out of the sheet 200 (see FIG. 5e). The newly punched out Kleinstanzteil 220.2 displaces the Kleinstanzteil 220.1 from the first punching cycle in

At the same time, the Kleinstanzteil 220.1 is pressed through the opening 156 in the direction of the suction chute 158 (see the position of the first punched Kleinstanzteils 220.1 in Figs 5e and 5f). Subsequently, the

Punching element 150 lifted off the sheet 200 again, with the two small dance parts 220.1 and 220.2 both punching cycles are in the receiving area 157 and in the adjoining opening 156. The punching cycle described in FIGS. 5 d to 5 f may be repeated a third and fourth time (not shown), wherein in each case a further small pulp part (220.3, 220.4) is received by the punching line 154. In the figures 5g to 5i, a subsequent fifth punching cycle is shown, in which a further sheet 200 is punched. In Fig. 5g, the punching element 150 is lowered down to the sheet 200 and punched out in Fig. 5h another Kleinstanzteil 220.5 from the sheet. As shown in Fig. 5i, the punched Kleinstanzteil 220.5 is again from

Punching element 150 taken. During punching (see Fig. 5h) of the Kleinstanzteils 220.5 all previously stacked in the receiving area 157 and in the opening 156 Kleinstanzteile 220.1-220.5 are pressed more and more in the direction of the suction duct 158 until the first Kleinstanzteil 220.1 reaches the suction duct 158. The deflecting device 159 designed as an inclined plane directs the small dance parts directly in the direction of the lateral exit (second open end 158b) of the extraction shaft 158.

Further, as shown in FIGS. 5g to 5i, the diverter 159 can help to fan out and stack the small dance pieces 220.1-220.5 stacked and adhered to each other. In Fig. 5h, for example, the Kleinstanzteil 220.1 from the first

Punching cycle pushed to the deflecting element 159 and by the slope of the

following Kleinstanzteil 220.2 solved. Through this fanning process, the suction is further supported. Because the entering in the exhaust duct 158

Small dance parts are sucked successively. Thus, clogging of the exhaust duct 158 is prevented by stacking a plurality of small parts in the exhaust duct 158.

The sheet punching technique described herein ensures precise stamping of small parts to produce recesses in the benefit. The application of the punching tool described further ensures reliable removal of the stamped small dance parts from the sheet. By simultaneously punching the benefits and punched out the Kleinstanzteile from the benefits using only one tool In addition, an optimized process is provided, in particular for the production of packaging made of paper or paperboard, such as cigarette packs.

Claims

1. stamping element (150, 350) for punching of Kleinstanzteile (220.1-220.5) from a sheet (200), wherein the punching element (150, 350) comprises a base body (152) on its the sheet (200) facing end side at least one punching line (154) and at least one opening (156), wherein in each case a punching line (154) is associated with an opening (156), wherein the opening (156) in conjunction with a

Suction shaft (158, 358), which extends through the base body (152) of the punching element (150, 350), and wherein the base body (152) in a punching plate (120, 320) is integrally formed.

2. punching element (150, 350) according to claim 1, wherein the at least one punched line (154) is formed closed in the circumferential direction.

3. punching element (150, 350) according to any one of the preceding claims, wherein the one of each punching line (154) associated with opening (156) in the circumferential direction of the punching line (154) is surrounded.

4. punching element (150, 350) according to any one of the preceding claims, wherein each punching line (154) is formed such that it receives the Kleinstanzteile (220.1-220.5) of several consecutive punching cycles and to the opening (156) out passes.

5. punching element (150, 350) according to any one of the preceding claims, wherein the punching element (150, 350) on the front side a plurality of punched lines (154), each associated with an opening (156), each opening (156) in connection with the suction shaft (158, 358) stands.

6. punching element (150, 350) according to any one of the preceding claims, wherein the suction duct (158, 358) is part of a suction system, which is adapted to suck the through each opening (156) passing Kleinstanzteile (220.1-220.5).

7. punching element (150, 350) according to any one of the preceding claims, wherein the suction duct (158, 358) has at least two open ends, comprising a first open end (158a, 358a) in communication with the opening (156), and a second open end (158b, 358b), which in one of the end face of the base body (152) different side of the G round body (152) opens.

8. punching element (150, 350) according to claim 7, further comprising an im

Absaugschacht (158, 358) arranged deflecting element (159) which is adapted to the at the first open end (158a, 358a) of the suction duct (158, 358) entering Kleinstanzteile (220.1-220.5) to the second open end (158b, 358b) the exhaust duct (158, 358) to direct.

9. punching element (150, 350) according to any one of the preceding claims, wherein the suction duct (158, 358) is coated.

10. punching element (150, 350) according to any one of the preceding claims, wherein the base body (152) has a cuboid shape and wherein one of the cuboid surfaces is the end face of the base body (152).

11. punching element (150, 350) according to any one of the preceding claims, wherein the base body (152) made of steel or other suitable material.

12. punching tool (100, 300) for punching out of a sheet (200), wherein the punching tool (100) has at least one punching plate (120),

on its side facing the sheet (200) at least one punching line (130) for punching the sheet (200); on its side facing the sheet (200) at least one recess (140, 340), in which at least one punching element (150, 350) according to one of the preceding claims is receivable; and

further comprising at least one suction channel (160, 360) coupled to the suction duct (158, 358) of the at least one punching element (150, 350).

13. Punching tool (100, 300) according to claim 12, wherein the at least one punching line (130) of the punching tool (100, 300) and the at least one punching line (154) of the at least one punching element (150, 350) form a common punched profile.

14. Punching tool (100, 300) according to claim 12 or 13, wherein the at least one suction channel (160, 360) together with the at least one suction duct (158, 358) of the at least one punching element (150, 350) forms an exhaust system.

15. punching tool (100, 300) according to any one of claims 12 to 14, wherein the at least one suction channel (160, 360) through the at least one punching plate (120, 320) and / or a first support means extends, in which the punching tool is receivable ,

16. punching tool (100, 300) according to any one of claims 12 to 15, wherein the

Inner walls of the suction channel (160, 360) are coated.

17. Punching device comprising a punching tool (100, 300) according to any one of claims 12 to 16, and a suction device, with the at least one

Suction duct (160, 360) of the punching tool (100, 300) is coupled.

18. Punching device according to claim 17, wherein the suction device is pneumatically coupled to a first open end (162, 362) of the at least one suction channel (160, 360) and is further adapted to hold the punched small dance parts (220.1-220.5). through the at least one suction channel (160, 360) and suction duct (158, 358) to suck.

19. Punching device according to claim 17 or 18, further comprising a

Compressed air supply device, which is pneumatically coupled to a second open end (164, 364) of the at least one suction channel (160, 360) and is further adapted to direct an air flow in the suction channel (160, 360) for removing the small dance parts (220.1-220.5). to create.

20. Method for punching benefits from a sheet (200) with a

Punching device comprising a punching tool (100, 300) according to one of claims 12 to 16, the method comprising the following steps:

Placing the sheet (200) on a punching tool (100, 300)

opposite counter-punching plate;

Moving the punching tool (100, 300) in the direction of the counter-punching plate, clamping the sheet (200) between the punching tool (100, 300) and the counter-punching plate, and stamping the benefits through the punching lines (130) of the punching tool (100, 300);

simultaneous punching at least one Kleinstanzteils (220.1-220.5) using the at least one punching element (150, 350); and

Suction of the at least one stamped Kleinstanzteils (220.1-220.5) on the suction shaft (158, 358) of the at least one punching element (150, 350).