Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
  • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
  • B26D7/18—Means for removing cut-out material or waste
  • B26D7/1818—Means for removing cut-out material or waste by pushing out
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
  • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
  • B26D7/18—Means for removing cut-out material or waste
  • B26D2007/1872—Means for removing cut-out material or waste using breakaway pins
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
  • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
  • B26D7/18—Means for removing cut-out material or waste
  • B26D2007/1881—Means for removing cut-out material or waste using countertools
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T225/00—Severing by tearing or breaking
  • Y10T225/30—Breaking or tearing apparatus
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T225/00—Severing by tearing or breaking
  • Y10T225/30—Breaking or tearing apparatus
  • Y10T225/329—Plural breakers
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T225/00—Severing by tearing or breaking
  • Y10T225/30—Breaking or tearing apparatus
  • Y10T225/371—Movable breaking tool

Definitions

• the invention relates to a device for removing stripped parts, especially waste pieces, from a blank or the like. Containing flat pieces of material sheet according to the preamble of the independent claim.
• EP 0 446 702 B1 of the applicant shows that punching machines for producing blanks from cardboard sheets in the folding box industry have been provided with stripping devices for more than 30 years, which are preferably arranged in an embossing table outside the punching machine.
• stripping devices for more than 30 years, which are preferably arranged in an embossing table outside the punching machine.
• Such a stripping station is of particular importance for production, since if it is used incorrectly, it takes the largest part of the overall set-up time and a poorly set stripping station leads to ongoing disruptions to the production process.
• the punched-out cardboard sheet is freed of waste after reaching a predetermined resting position on the stripping surface usually offered by a stripping board or a die by means of stripping pins or cutters that press from above.
• the first step in the development of the stripping technique was the top tool pin, which pushes the waste piece through the opening of the stripping board. Then there was an additional lower tool with lower pins, which are aligned with the upper tool pins and hold the waste piece in place. Since a stripping tool can only safely break out a piece of waste if there is a certain amount of friction between the tool and the piece of waste, the lower pins mentioned have proven to be a favorable resistance at the moment the stripping tool or stripping member hits the piece of waste. - 2 -
• the break-out opening in the break-out area must be kept smaller at various points than the waste piece assigned to it, so that it rests in the small area areas on the break-out surface or die with higher friction.
• the resistance now arises when the stripping pin hits the waste thanks to the friction generated.
• DYN pin a stripping pin with a tip
• the l.w. have conical side walls with a smooth surface and concave contours in cross section.
• this tip meets the waste piece, which, when placed on the breakthrough edges, opposes the tip with so much resistance that this tip can penetrate the material of the waste piece slightly. This prevents undesired lateral evasion of the piece of waste.
• the waste piece bends, the tension between it and the breakthrough wall should provide the DYN pin with sufficient friction to the desired frictional connection with the waste piece, which could then possibly make a lower tool itself unnecessary when the DYN pin is used.
• the above-mentioned EP 0 446 702 B1 proposes, as a simplification of stripping tools, an abutment which is movable and / or resilient within a distance of the opening - at least partially in the case of an inclined position - at a distance from the stripping surface, which in its rest position the piece of waste located in the sheet of material grips around in parallel and, when the piece of waste is moved - that is, primarily when lowering - is transferred through the stripping element into an angle of inclination to the sheet of material.
• the resilient surface can be designed as a tongue-like spring, the emends on the stripping surface - with it at rest - would be approximately in alignment - fixed and the free end of which is arranged in the opening. Also described are angle pieces, one leg of which is aligned with the stripping surface and the other leg of which is articulated below the stripping surface and is spring-loaded.
• the resilient surface can also be offered by rubber profiles or by bristles.
• DE-C-41 24 089 offers a parallelepiped-like stripping tool with a rectangular cross-section, from the pressure face of which two pressure peaks protrude to extend the two narrow sides.
• the abutment device is formed by a abutment tool, which is rigidly connected to the break-out surface or die in the edge region of the opening and is equipped with a support or abutment surface that can be inclined with respect to this connection pairing.
• this connection pairing consists of a vertical receiving groove m of the die at the edge of its breakthrough on the one hand and a coupling strip or rib which can be received in the latter and which extends into the direction of breakout.
• the abutment tool offers a hermtercut groove for receiving a corresponding coupling strip of the die.
• the respective cross sections of the coupling strip and the receiving groove should advantageously be dovetail-shaped and thus define an operating position that is easy to produce. If necessary, several such connection pairs can be provided.
• the abutment tool is an angle piece with at least one coupling rib formed from the one leg, vertical, in the installation position, and a dovetail-like cross section, as well as a flexible, other leg, which forms the bearing surface, horizontal. It has proven to be advantageous to form the angle piece overall from a limitedly flexible material which ensures a long service life.
• connection pairing consists of at least one vertical — m breaking direction — receiving groove m of the die on the edge of its breakthrough on the one hand and from a section of a vertical leg of the abutment tool that can be fitted on the other hand.
• the respective cross sections of the coupling strip and the opening should advantageously be formed at right angles and thus define an operating position that is easy to produce. If necessary, several such connection pairs can be provided. It has proven to be advantageous that the flexible leg forming the bearing surface has an edge recess delimited on both sides by cantilever parts and at least one inner recess from this distance. This configuration results in a particularly favorable, dimensionally stable, yet flexible contact surface.
• At least one peg-like plug-in element is formed on the vertical leg, which extends at a distance from the vertical leg and is designed to be insertable into a recess in the die provided at a distance from the receiving groove.
• This plug-in element should - like the recess receiving it - be of rectangular cross-section, this plug-in element protruding either at a distance from the back surface of the vertical leg or at a distance from the flank surface of the vertical leg from a integrally formed crosspiece A pairing of plug-in elements is preferred for assignment to the flank surfaces.
• flank surfaces of the vertical groove are stepped, the vertical leg being supported in the cross-sectionally narrower back area of this stepped vertical groove, the horizontal leg thus projecting beyond the further front area of the vertical groove.
• the vertical leg is to be connected with a coupling pairing to a leg of a bracket angle running in the vertical groove, the other leg of which is connected to the die, preferably in a non-positive manner.
• a pocket on the underside of the die for the console leg of the console angle, into which pocket this leg projects.
• at least one catch finger can be arranged downstream of the leg forming the contact surface in the knockout direction, but a pair of catch fingers flanking on both sides is preferred. These widen from their free end to the leg formed on them - longitudinal section - to increase flexibility.
• the horizontal leg is flanked by side parts which are molded onto the other leg, that is to say run vertically.
• an abutment tool with a partial frame which is approximately U-shaped in cross-section and consists of a spine section which contains the coupling rib and which has two parallel side walls; a support plate for the stripping part is arranged between the latter so as to be pivotable about an axis, which is usually horizontal in the position of use.
• Attacking the stripping tools can also become more efficient if their free end is opposite an edge recess which starts from the free edge of the contact surface.
• the free end of the pressure pin or the fork tines is designed as a rough surface.
• This roughened surface can be formed by a coating which is formed, for example, with oxides, carbides, corundum or the like and optionally applied by thermal spraying.
• Another embodiment according to the invention offers a roughened surface with m the surface of the pressure pin or the like Fork / s provided irregularities, such as teeth or gradations. These can be produced by mechanical, chemical or electrical treatment.
• the roughened surface described - for which separate protection is required the desired firm access is created and the part to be broken out is effectively prevented from sliding off.
• the axial height of the roughened surface at most correspond to the diameter of the pressure pin or the width of the fork, preferably to be less than 5 mm.
• That fork member is intended to protrude from a plate-shaped pawl and, according to the invention, is connected to this by a section of the fork member which offers clamping noses and which can also have stops which are guided against the surface of the pate.
• insert pieces for the die are m support openings arranged on their edge and placed on plug-in profiles, which face each other and which are provided with radial support lips made of elastic material.
• This support molding is preferably an elbow, one leg of which Support lip is, wherein the integrally formed other leg is formed by a hollow profile; the latter preferably corresponds to a cylindrical bowl and is pressed onto a plug-in profile in a simple assembly in the direction of break-out.
• clip-like tools which are fixed to the opening of the die and each contain a frame part from which resilient support tongues protrude or on which internal support plates can be guided around a pivot axis; This creates simple additional tools in the form of spring clips or mechanically moved clips that even allowed the tools to be standardized.
• FIG. 2 shows a side view of FIG. 1
• FIG. 8 an enlarged illustration corresponding approximately to FIG. 6 with an abutment tool modified compared to FIG. 6 and another stripping tool;
• Fig. 9 the top view of part of another stripping board with abutment tool
• FIG. 10 a reproduction of a further embodiment corresponding to FIG. 9; - 10 -
• FIG. 12 a representation corresponding to FIG. 11 of an arrangement with a stripping tool
• Fig. 13 a sectional sketch of Fig. 11,12;
• FIG. 16 the device according to FIG. 9 in section
• Fig. 19 two side views of Fig. 18;
• FIG. 21 one corresponding to the representation in FIG. 18
• FIG. 22 a side view of FIG. 21;
• Fig. 23 a front view of another
• Fig. 26 Side views of three other versions of the stripping tool
• Fig. 38 Top views of resiliently effective special tools
• Fig. 47 the abutment tool of Fig. 43, 44 m front view
• Fig. 48 the abutment tool of Figs. 46, 47 in an oblique view. - 12 -
• Cardboard sheets 10 used in the folding box industry have punched blanks for folding shafts or the like, with pieces 12 resulting from the blanks or on them.
• the punched cardboard sheet 10 arrives on a stripping board or a die 14 of the example thickness 12 mm, on which it is freed of its waste pieces 12; these are located above - depending on their contour - openings 16 in which, in the cross section of FIGS. 4 to 7, an upper frame part 17 with a vertical wall is followed by a downwardly opening cone part 18.
• an abutment tool 20 is fixed for the waste piece 12, which is a kind of angle piece with two legs 22, 24 made of flexible plastic with a high number of load cycles according to FIG.
• a coupling rib 27 which has cut-out flanks 26, protrudes and is inserted into a vertical groove 28 in a dovetail-like cross section of the die 14.
• this vertical groove 28 proceeds from a wall surface 15 delimiting the opening 16.
• the resilient horizontal leg 24 of the abutment tool 20 of thickness a offers an inner recess 30 and an edge recess 32 on its free edge 25; two of the latter flanking prong-like cantilever parts 34 of the horizontal leg 24 are curved slowly and each form a type of pan.
• a trap 38 for the waste piece 12 is formed on the vertical leg 22, which is curved slowly downwards and tapers towards its free end 36 hm. - 13 -
• a stripping member or tool presses from above the shape of a pressure pin 40 with a roughened - dome-like - dome-like printing end in a punctiform manner or - for example in Fig. 8, 12 - as a fork member 41 approximately lien-shaped; the flat fork tines 42 of the fork member 41 are aligned with one another.
• Both that dome-like pressure end of the pressure pin 40 and the flat ends of the fork prongs 42 mentioned are provided with a roughness-producing coating 44 of axial height h of approximately 4 to 10 mm, which, for example, by a thermal spraying process of aluminum oxide, corundum, carbide grains or the like has been manufactured.
• the preferred height h is at most equal to the diameter d of the pressure pin 40 and the roughness depth is less than 0.5 mm.
• This coating can also be replaced by roughening the surface of the pressure pin 40 or the flat prong 41, which is produced chemically, electrically or - for example by means of sandblasting - mechanically.
• the waste piece 12 is separated from the cardboard sheet 10 by pressure and guided away downward in the stripping direction x.
• the edge recess 32 has a partial circular contour at the end, and the horizontal leg 24 is flanked by side parts which each form the catcher 38 described and, like the horizontal leg 24 itself, are integrally formed on the vertical leg 22 .
• FIG. 10 shows a change in the connection pairing between abutment tool 20 n and die 14, as compared to FIG. 9; the latter engages a vertical groove 31 of the abutment tool 20 or its vertical leg 22 with a vertical bar 29 m projecting from the wall surface 15.
• the flank of the vertical groove 31 is designated 26 a . - 14 -
• the support surface 25 for the waste piece 12 is offered by a support plate 46 which hangs separately between side walls 23; this rests with unrecognizable side pins
• the support plate 46 is approximately parallel to inclined front ribs 50 of the side walls 23, which also form catchers.
• the support plate 46 a of FIG. 14 intended for long pieces of waste 12 shows two edge recesses or chambers 32 which flat tines 42 of an otherwise not shown fork member 41 are assigned to.
• Fig. 15 protrude from opposite wall surfaces 15 delimiting the opening 16 strip-like cantilever parts 34 a made of flexible material, which form chamber spaces 33 of width n between them; those cantilever parts 34 a flank the pressure pins 40 immersing the chamber spaces 33 or flat tines 42 corresponding to them.
• the wart-like clamping nose 60 or the stop 54 can also be seen in the fork member 41 a of FIGS. 18 to 25.
• the free ends of the fork or flat tines 42 delimited by straight or curved end edges 43 or 43 a , here have mechanically produced roughnesses in the form of teeth inclined at approximately 30 ° with FIGS. 18, 19, formed on one side or on both sides near the edge 61 m Fig. 21, 22 about 90 ° protruding teeth 61 a , hook 61 b (Fig. 20) or molded shoulders 61 c on fork 42 a .
• FIG. 23 offers a stripping tool 41 b with only one flat prong 42 b , which is delimited below by the aforementioned end edge 43 a , which is bent in cross section.
• Abutment tool 20 or its cantilever part 34 snaps back to its starting position.
• FIG. 29 shows an illustrative oblique view of a die 14 made of plywood, at the opening 16 of which an angle piece 20 is releasably fixed as an abutment tool; Above the latter stands a fork member 41 a with its flat teeth 42 a molded shoulders 61 c .
• the fork member 41 a of FIG. 30 shows the teeth 61 protruding inclined from the flat teeth 42 as well as an area of coating 44 on the finger or end portions 45 of the flat teeth shaped as a tip.
• the stripping tool 41 b of FIG. 31 is - corresponding to that of FIG. 23 - equipped with a flat tooth 42 a provided laterally here, which offers an end-like shoulder 61 c .
• the die 14 a of FIGS. 33, 34 has a breakthrough 16 a with the same cross-section on both sides - shown in FIG. 32 - a support fitting 62 made of a cylindrical sleeve neck 63 and a radial support lip 64, which in turn offers an edge recess 32.
• the inverted neck 63 is connected to a plug-in profile 65.
• the stripping tools 40 are arranged in the region of the edge recesses 32.
• FIGS. 35, 36 spring clips 66, 66 a for waste pieces 12 a and 12 b, round and semicircular contours, in addition, m FIGS. 37, 38 spring clips 70 and 68 for waste 12 c of a stretched so-called euro hole or for cigarette waste 12 d .
• 39 and 40 show mechanical clips 72 and 72 a for round waste pieces 12 a and for rectangular waste pieces 12 , respectively.
• FIG. 41 shows an abutment tool 20 e , the vertical leg 22 of which is rectangular in cross section and provided with a groove 80 with a strip 80 parallel to it; both are connected by a cross bar 82 formed on both sides.
• the parallel strip 80 engages from below with a punching 84 of the stripping board 14 corresponding to its cross section, which is separated from the opening 16 of rectangular cross section by a board web 86 sitting in that groove. From the latter, a vertical groove 28 a also has a rectangular cross section - with stepped flank surfaces 88.
• the vertical leg 22 of the abutment tool 20 £ of FIGS. 43 to 45 also sits in the back area 90 of a vertical groove 28 ⁇ .
• Kalschenkels 22 are longitudinally L-shaped plug-in strips 92 formed by the above-mentioned transverse webs 82 at a distance y, which m m corresponding flank holes 94 of the stripping board 14 are inserted in the rest position shown in FIGS the vertical groove 28 a .
• An abutment device 96 m stripping board 14 of FIGS. 46, 47 consists of an angular plastic body 21 provided for the vertical groove 28 b with a short vertical leg 97, which has a downwardly open plug channel 98 for a cross-sectionally rectangular tongue 99 of the vertical leg 100 one Console bracket 102 offers. 46 m, horizontal leg 101 is non-positively fixed on the lower surface 13 of the stripping board 14.

Priority Applications (1)

Applications Claiming Priority (9)

Related Child Applications (1)

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• 1998
  • 1998-08-18 DE DE1998225182 patent/DE29825182U1/de not_active Expired - Lifetime
• 1999
  • 1999-04-01 CA CA 2327083 patent/CA2327083A1/fr not_active Abandoned
  • 1999-04-01 WO PCT/EP1999/002266 patent/WO1999051405A1/fr active IP Right Grant
  • 1999-04-01 US US09/647,699 patent/US6997363B1/en not_active Expired - Fee Related
  • 1999-04-01 CN CN99806072A patent/CN1300246A/zh active Pending
  • 1999-04-01 EP EP99919179A patent/EP1068053B1/fr not_active Expired - Lifetime
  • 1999-04-01 DE DE59913086T patent/DE59913086D1/de not_active Expired - Lifetime
  • 1999-04-01 JP JP2000542155A patent/JP2002510561A/ja active Pending
  • 1999-04-01 AT AT03002304T patent/ATE316849T1/de not_active IP Right Cessation
  • 1999-04-01 AT AT99919179T patent/ATE269193T1/de not_active IP Right Cessation

Non-Patent Citations (1)

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