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
• • 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
• • 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
  • Y10T225/10—Methods
• • 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, to a clamping tool and to a method for breaking out cutting waste when punching cardboard in an automatic punching machine.
• clamping tools which can be moved vertically and clockwise below the die plate for grasping and separating the waste parts in cooperation with the stripping tools.
• Stripping tools or equivalent pressure punches or the like which can be placed on the waste parts from above can be used as stripping tools.
• stamping machine station in which the cutting waste is broken out of the cardboard sheet and falls into a waste container.
• the punched cardboard sheet lies on a die plate such that its openings are congruent with the waste parts of the cardboard sheet.
• the cutting waste is now gripped or clamped by a stripping tool or clamping tool brought up from above or below in the form of stripping pins and opposing, usually resiliently mounted clamping pins, and when the two tools move downwards together, they are pressed through the die opening and thus out of the Cardboard sheet broken out. While the tool with the clamping pins moves further down to ensure that the cut waste that has been broken out can be removed effortlessly, the stripping pins move up again immediately in order to enable the following cardboard sheet to be fed.
• the upper and lower stripping or clamping tools are advantageously fastened in slide-in frames which are used in slides in the break-out station.
• break-out pins and the clamping pins are usually set by hand exactly in accordance with the shape and arrangement of the openings in the die plate or the cutting waste, with a larger portion for most of the waste
• ERSATZBL ⁇ TT REGEL26 Number of break-out pins must be exactly opposite individual clamping pins. While the arrangement of the stripping pins according to the respective shape of the cutting waste is already programmable for the different types of cutting and can be done by inserting into automatically generated bores of a mounting plate, the clamping pins are in any case manually moved on rails that can be moved in a frame - between them the waste parts can fall into the waste container - precisely aligned with the break-out pins.
• the object is achieved in a stripping device for cutting waste according to the preamble of claim 1 in that
• the clamping tool is designed as a flat element
• the surface of the openings in the die plate can be pressed against the die plate and
• the invention also relates to an embodiment in which the break-out or die plate is made as thin as, for example, a film and is supported by a flat element without an elastic surface.
• the waste part is clamped after an extremely short path of the break-out pins after they have been placed on the waste part. Because this short path corresponds approximately to the thickness of the wafer-thin die plate.
• the elastic operative connection between the clamping tool designed as a flat element and the knock-out pins is produced particularly simply in that the clamping tool is formed by a flat, elastic cover layer with a smooth surface arranged on a firm, flat base is.
• the elastic cover layer consists of a foam which compresses when the clamping tool designed as a flat surface is pressed against the die plate and bulges into the die openings and thereby clamps the waste part between the stripping pin and the flat clamping tool and this in the Downward movement of the stripping and clamping tool also maintained, thus ensuring the safe holding and breaking out of the waste part.
• the separated waste parts are removed by means of wiping or blowing devices.
• the clamping segments are preferably about their longitudinal axis in time with the upward and downward movement of the insertion frame for the clamping tool, each rotatable by preferably 90 °, in the initial length on the die plate a flat connected clamping surface and, during the downward stroke, forming components with the cross section of an equilateral triangle , the outer surfaces with the elastic cover layer
• SPARE BLADE (RULE 26) are occupied.
• RULE 26 SPARE BLADE
• the clamping tool according to the invention is formed from plate-like clamping segments rotatable about its longitudinal axis with an elastic cover layer provided on both sides, the plate-like clamping segments for forming openings between the clamping segments and for throwing off the waste parts after a breakout stroke during the downward or upward stroke in each case by at least 90 ° are rotated.
• the plate-shaped clamping segment is preferably covered on one side with the elastic cover layer and is folded in the working cycle to form ejection openings during the downward stroke by a certain angle supporting at least 90 ° and is folded back into the initial position during the subsequent upward stroke, in order to thereby separate the separated waste parts to remove from the clamping surface.
• drive motors are attached to the mounting frame of the device, which are operatively connected to the axes of the clamping segments for the rotary drive thereof and are controlled synchronously with the drive system of the automatic punching machine.
• the drive motors are otherwise controlled so that the clamping segments are driven in the same direction of rotation during the downward stroke and the upward stroke, unless it is used to swing back and forth plate-shaped clamping segments.
• a single drive which effects the reciprocating movement of the clamping segment is provided.
• the clamping tool without the elastic cover layer, is designed as an overall elastic or elastically supported, single or multi-part flat element, or the stripping pins are elastically supported and the single or multi-part flat element itself is not elastic, as already explained above .
• the present invention specifies a tool for breaking out cutting waste of different shape, size and arrangement which can be used universally, that is to say for different types of cuts and cutting arrangements, and which can also be used in conventional stripping stations without problems and simple retrofitting existing facilities allowed (see claim 19).
• the intermittent opening of the clamping surface in a multi-part clamping tool formed from clamping segments ensures, on the one hand, that the waste separated from the cardboard blanks is safely ejected without additional aids and can also be driven by simple drives with a synchronization to the lifting movement z.
• Part of the invention is also a clamping tool according to claims 20 and 21 and furthermore a method according to claims 22-23.
• Fig. 1 is a perspective view of the stripping station of an automatic punching machine with a receiving frame for the stripping tool, a die plate and a clamping tool and
• FIGS. 2-5 show a schematic illustration of the stripping process using a flat clamping tool.
• the stripping station of an automatic punching machine for carton blanks essentially consists of the three stacked frames 1, 2 and 3 for the stripping tools, which are also arranged as insertion frames for retrofitting,
• REPLACEMENT SHEET (RULE 20) the die plate 11 and the clamping tools.
• the holding frame 1 there is a holding plate 4, into which holes 8 are made in accordance with the shape, size and arrangement of the waste parts 6 to be broken out of the cardboard blank 7, in which knockout pins 9, which form the knockout tool, are fastened.
• Elastic, block-shaped hold-down devices 10 for the cardboard blanks 7 are also attached to the underside of the receiving plate 4.
• Another receiving frame 2 with lateral holding rails 15 serves to receive the die plate 11, in which the waste parts 6 between the cardboard blanks 7 in the form and arrangement are provided identical die openings 12 which are slightly larger than the waste parts 6.
• the cardboard sheet 5 punched in the punching device is held together by small cardboard bridges 13 left between the waste parts 6 and the cardboard blanks 7, so that the cardboard sheet 5 can be completely removed from the punching device by means of grippers and an accident due to loose waste parts 6 in the punching area is excluded.
• the punched cardboard sheet 5 which is in the correct position on the die plate 11 before the waste parts 6 are broken out and is essentially identical to the latter in plan view, is indicated by the dashed line 14.
• the clamping tool is finally received by a further receiving frame 3.
• the clamping tool is designed as a multi-part, flat element 16, which consists of triangular cross-sectionally, on the end faces of the mounting frame 3 rotatably mounted clamping segments 16a.
• the outer surfaces of the clamping segments 16a form firm, flat bases 17b and have an elastic cover layer 17, which represents the actual clamping element.
• the rotationally movable clamping segments 16a are driven in synchronism with the usual cyclical upward and downward movement of the receiving frame 3 via a gear (not shown) arranged on the receiving frame 3 and provided with a drive motor. In this way, a clockwise and preferably modulatable rotary movement of the clamping segments 16a takes place by a certain angular amount.
• the bores 8 in the receiving plate 4 and the die openings 12 in the die plate 11 are generated automatically according to a predetermined program and the stripping pins 9 in the holes 8 inserted and the hold-down device 10 on the mounting plate
• the mounting frames 1, 2 prepared in this way are pushed into the stripping station of the automatic punching machine.
• the insertion frame 3 used is preferably a slide-in frame usually used in break-out stations for fastening the clamping pins serving as counterholders for the waste part.
• the functional effect of the clamping tool in the form of a flat element with an elastic cover layer 17 in connection with the stripping pin 9 is described below with reference to FIGS. 2 to 5, FIG. 2 the position before stripping, FIG. 3 the position at the beginning of the stripping process, FIG 4 shows the position after breaking out and FIG. 5 shows the position when the clamping segment tilts to remove the waste part and new cardboard sheet placed on the die plate 11.
• the punched cardboard sheet 5 deposited on the die plate 11 by means of a gripper (not shown) is held on the die plate 11 by the holding-down device 10 after the holding frame 1 has moved downward.
• the entire surface of the flat element 16 with the clamping segments 16a presses against the die plate 11 from below.
• the die plate 11 is supported from below and can, since it now only has to absorb small forces during the breaking-out process , be carried out in comparatively low strength.
• the low thickness of the die plate and the elastic design of the surface of the clamping segments 16a cause the elastic cover layer 17 made of foam to bulge into the die opening 12 and, as can be seen from FIG.
• the waste part 6 is supported flatly and taken along until the cardboard bridge 13 is torn off between the cardboard blank 7 and the waste part 6 and the subsequent ejection from the die opening 12 . so that sliding of the stripping pin 9 on the waste part 6 is avoided and safe stripping is ensured.
• the elastic bulging of the elastic cover layer 17 made of foam is not required if the die plate 11 is extremely thin and the flat element 16 is not elastic (not shown), so that the underside of the waste part 6 already touches the flat element 16 when the cardboard sheet 5 is placed on it or almost touched, but at the latest after placing the stripping pin 9 on the top of the waste part 6.
• the downward stroke of the receiving frame 3 is continued in order to perform a further function of the clamping tools designed as a flat element 16, namely the ejecting process for the separated waste part 6.
• the gear not shown, gives the clamping segments 16a a rotary movement of at least 60 °, but preferably of 90 °.
• the clamping surfaces of the clamping segments 16a go into an inclined position (FIG.
• the triangular clamping segments 16a assume the position shown in dash-dotted lines in FIG. 1 with the tip pointing vertically (60 ° rotation) or obliquely (90 ° rotation, not shown).
• the rotational movement of the clamping segments 16a is continued by a further angle of 60 ° with a 60 ° rotation for a downward stroke and of 30 ° for a 90 ° rotation with a downward stroke.
• the waste part can still fall off the clamping surface of the clamping segment 16a during the upward stroke if, in exceptional cases, it has not already fallen off during the downward stroke.
• a trailing brake is expediently integrated into the drive system.

Landscapes

• Life Sciences & Earth Sciences (AREA)
• Forests & Forestry (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
• Details Of Cutting Devices (AREA)
• Making Paper Articles (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=6488191

Family Applications (1)

Country Status (9)

Families Citing this family (10)

Family Cites Families (16)

• 1994
  • 1994-05-14 CA CA002162917A patent/CA2162917A1/fr not_active Abandoned
  • 1994-05-14 US US08/537,748 patent/US5735442A/en not_active Expired - Fee Related
  • 1994-05-14 JP JP6524984A patent/JPH08510172A/ja active Pending
  • 1994-05-14 DE DE59402312T patent/DE59402312D1/de not_active Expired - Fee Related
  • 1994-05-14 EP EP94918324A patent/EP0697940B1/fr not_active Expired - Lifetime
  • 1994-05-14 AT AT94918324T patent/ATE151005T1/de not_active IP Right Cessation
  • 1994-05-14 ES ES94918324T patent/ES2103594T3/es not_active Expired - Lifetime
  • 1994-05-14 WO PCT/EP1994/001569 patent/WO1994026480A1/fr active IP Right Grant
  • 1994-05-14 AU AU69700/94A patent/AU673611B2/en not_active Ceased

Non-Patent Citations (1)

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