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EP0060213A1 - Dispositif de marquage pour de différents signes - Google Patents

Dispositif de marquage pour de différents signes Download PDF

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Publication number
EP0060213A1
EP0060213A1 EP82730024A EP82730024A EP0060213A1 EP 0060213 A1 EP0060213 A1 EP 0060213A1 EP 82730024 A EP82730024 A EP 82730024A EP 82730024 A EP82730024 A EP 82730024A EP 0060213 A1 EP0060213 A1 EP 0060213A1
Authority
EP
European Patent Office
Prior art keywords
embossing
characters
die
embossing device
wheel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP82730024A
Other languages
German (de)
English (en)
Other versions
EP0060213B1 (fr
Inventor
Gottfried Weber
Heinz Blankenburg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GERHARD FLEMMING & HERMANN PEHRSSON GMBH
Original Assignee
Gerhard Flemming & Hermann Pehrsson GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gerhard Flemming & Hermann Pehrsson GmbH filed Critical Gerhard Flemming & Hermann Pehrsson GmbH
Priority to AT82730024T priority Critical patent/ATE11247T1/de
Publication of EP0060213A1 publication Critical patent/EP0060213A1/fr
Application granted granted Critical
Publication of EP0060213B1 publication Critical patent/EP0060213B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B5/00—Machines or apparatus for embossing decorations or marks, e.g. embossing coins
    • B44B5/02—Dies; Accessories
    • B44B5/026—Dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B5/00—Machines or apparatus for embossing decorations or marks, e.g. embossing coins
    • B44B5/0076—Machines or apparatus for embossing decorations or marks, e.g. embossing coins having a series of embossing tools each of which can be brought into working position

Definitions

  • the invention relates to an embossing device with the features of the preamble of claim 1, preferably for embossing character strings in chassis made of sheet steel of motor vehicles.
  • a corresponding device for embossing plastic films is known from DE-A-25 55 849.
  • this known device requires a pair of embossing wheels, on the circumferential surfaces of which there are raised characters or mirror-image depressions (matrices) around different ones To generate characters, the present invention is intended to simplify the control effort for embossing character strings.
  • the invention has for its object to reduce the manufacturing and control effort for such an embossing device.
  • the embossing wheel with raised characters on the circumferential surface is assigned only a single fixed die, which either has an overlay of the images of all the characters of the embossing wheel as a recessed pattern or is resilient on its surface. If only a single fixed die and only a single P n embossing wheel are used, the manufacturing and also the control effort are the least.
  • An advantageous further development of the invention is further based on the object of improving the deformation in such an embossing device in such a way that, in addition to a sharp representation of the digits, the die made of the elastic material has a long service life.
  • the inner shape of the characters (for example the inner surface of the number "zero") should also be sharply defined.
  • Such an elastic universal matrix preferably consists of polyurethane based on polyether with a Shore hardness of essentially 95 as a homogeneous element embedded in a milling.
  • the die is so thin that the flexibility is essentially exhausted when the letter edge is pronounced, the die preferably being molded into a metal bed in such a way that the elastic material is prevented from swelling by swelling .
  • a sandwich-like layering of soft types of plastic or rubber as a spring body with a covering wear layer of greater hardness does not withstand the cushion from the relatively large embossing forces.
  • the thin dimension of the die is in contrast to the dimensioning of rubber matrices for cutting work, where the layer thickness - when using polyurethane with a Shore hardness of approximately 80 - is more than five times the cutting template and the wear layer to be replaced alone is 15 to 20 mm thick having.
  • An approximately 2 mm thick polyurethane layer is used for embossing approximately 8 mm high characters in sheet steel (body sheet St 14.03 according to DIN 1623) with a thickness of 0.8 mm, whereby the cushion width only increases the letter dimensions by approx. 1 to 2.5 mm.
  • a longitudinally milled metal groove, into which the strip-shaped polyurethane material is glued, is preferably used for embossing rows of characters.
  • a synthetic resin adhesive (Macroplast UK 8202 with hardener UK 5400) is preferably used for this. By gluing, the possibility of the material to evade is further reduced. It is sufficient if the material is glued in the area of the ends.
  • the embossing tool must have a significantly different design when embossing with an elastic cushion than with hollow embossing with a metallic counter-shape. While sharp bending edges with a bevel of approximately 5 to 10 ° favor the embossing process when using a die made of metal, when embossing with an elastic cushion, good reflow of the material, which at first is only bulged or bulged, must be made possible.
  • the outer edges of the characters to be engraved should therefore be rounded in the cross-section in the summit area - preferably semicircular or almost semicircular.
  • the embossing process around the drawing area to be embossed can thus cause material to slip towards the embossing point, which is favored by a low coefficient of friction of the elastic material.
  • the full letter depth is thus determined from the material thickness of the sheet.
  • the high of The embossing mark is 10 to 20% larger, based on the embossing with a metallic matrix, since after the first bulging there must still be a sufficient path within the elastic matrix for the final shaping of the symbols.
  • embossing process itself takes place with a particularly good result under "dynamic" loading of the embossing tool, with a force limitation being carried out after the roller punch has been “struck", so that the sheet is embossed well without causing cracks.
  • the limit is approx. 200 kN.
  • matrices can be combined in one line of characters according to the different design variants, whereby only the assignment of the embossing wheel to the die is subject to restrictions, but then are irrelevant if there is a separate embossing wheel for each character position in a character set to be embossed.
  • the partial figures a and b represent a side view or top view of a die m which, in the form of depressions t, has a pattern which corresponds to an "8" of a known seven-segment display.
  • the partial figures c and d show a top view or side view of an associated stamping wheel p with characters in the form of numbers 0 to 9, which consist of segments in the form of elevations h.
  • measures are provided to increase the security against forgery when using multi-segment arrangements.
  • measures are provided to increase the security against forgery when using multi-segment arrangements.
  • efforts are made to make such changes recognizable.
  • a subsequent change of an embossed number could consist in adding segments - changing a "0" to an "8" by adding the middle slash.
  • the segments are then selected or arranged accordingly designed a character set in such a way that simply by adding segments or their parts, it is not possible to create another character of the agreed character set.
  • FIG. 3 shows a character set of this type, which is secured against counterfeiting, with an associated pattern m "for a die, which is shown in a pictorial manner.
  • the characters" 1 "to” 0 "of the partial figure a to be arranged on an embossing wheel are of this type designed that within this first number of characters no complete character corresponds to only part of another, based on a complete set of digits, possibly supplemented by a number of letters.
  • the character set according to FIG. 3a represents the complete number set.
  • the protected characters are the digits shown in sub-figure a and the additional characters are letters from sub-figure b, the letters being designed, for example, by doubling the left vertical bar in such a way that segments are never added again by adding segments Digit (which, by convention, must not have double lines).
  • impermissible attempts to convert digits from the character set b into digits from the character set a can also be made recognizable to those to whom the details of the complete character set are not known.
  • the principle underlying FIG. 3 can be characterized in that - in embossed position - character parts of the embossing wheel of a second number of characters corresponding to FIG. 3b cannot be made to coincide with character parts of a third number corresponding to FIG second number ( Figure 3b) are formed as parallel lines to parts of characters that also occur in the third number ( Figure 3a).
  • FIG. 4a shows a further design option for characters, namely numbers 1 to 4, to which FIG. 4b shows the m III pattern associated with the matrix.
  • FIG. 5a the associated pattern of the die IV being shown in FIG. 5b.
  • the symbols consist of individual raised cones and the matrix accordingly contains the overlay of all domes, which are adapted to the pyramid shape, for embossing the symbols of an embossing wheel required are.
  • the overlay takes the form of a dot matrix.
  • FIG 6 finally, another embodiment is also shown for three adjacent matrices V m in an array corresponding to three juxtaposed in the axial direction of embossing wheels.
  • the particularity of the matrices m V is that they are resilient, at least on the surface, so that the characters on the associated embossing wheels can have any shape; special characters can also be embossed, for example Greek letters or mathematical characters.
  • the elastic material of the matrices m V is indeed resilient but nevertheless so hard that the workpiece to be embossed is sufficiently pressed against the raised characters and their surroundings on the embossing wheel ", so that the embossing process is sufficiently sharply formed and clear limited embossed characters appear on the workpiece.
  • the matrix elements m V shown in FIG. 6 are plastic parts which are inserted into recesses in a metal frame made of steel. They consist of a polyurethane based on polyether, as it is manufactured under the name Fibroflex rot by Fibro GmbH, D-6954 HBAmersheim.
  • the Shore hardness of the plastic material is preferably 95 and the thickness is approximately 2 mm if, with an embossing pressure of 20 tons and a character height of approximately 7 mm, the elevations forming the character on the embossing wheel have a Depth of about 0.6 mm are raised.
  • the matrix is designed in one piece for several adjacent characters.
  • the plastic elements are dimensioned with regard to their resilience in such a way that when a rounded body, which corresponds to the punctiform or linear segment of the character to be embossed, penetrates the workpiece - after an initial "stamping", such resistance is opposed that only the one directly with the defining segment in contact workpiece area can move into the die due to the direct transmission of the contact pressure.
  • the die offers such great resistance that the entire workpiece deflects only to a small extent in the area surrounding the embossing segment. It is also particularly important that the embossing stroke is carried out so far that - after the raised embossing segment has penetrated the workpiece - the workpiece is pressed completely against the surface of the die by the embossing wheel, so that the workpiece is in the raised areas of the mark surrounding areas completely adapts to the embossing shape and the raised and flat areas are created in the relation given by the embossed sign on the wheel.
  • FIG. 7 shows an elastic die designed as an embossing strip 1, the strip being inserted flush into a corresponding cut-out in a support element 2 made of steel.
  • the matrix is made of polyurethane
  • the matrix is glued in an area 3. The gluing reduces the flexing work of the material and thus reduces the risk of fibers shearing off the material at the edge of characters to be embossed.
  • the die has a very small thickness, so that the compression forces that arise after a green bulging of the material are sufficient to sharpen the inner areas of characters, so that the desired embossed sharpness is achieved even where parts of the letter form corners with one another.
  • the matrix serves as a counterpart for sequences of characters arranged side by side (or one above the other). A corresponding dimensioning also applies to the lateral projection of the die elements in relation to the arrangement shown in FIG. 6.
  • the height h of a character is related to the width b. of the embossing strip, the strip being only slightly wider than the character high.
  • the overhang is a total of approximately 10% to 15%, the dimensioning being selected such that, on the one hand, the necessary pressure build-up in the material is maintained, but on the other hand the flexing work is not unnecessarily increased in the direction of premature wear of the die m VI .
  • FIGS. 9 and 10 show the embossing tool 10 in two positions with respect to a sheet to be embossed.
  • FIG. 9 is located above the sheet 11 resting on the matrix m VI .
  • the matrix in turn lies on the matrix support 2.
  • an element of an embossed sign 12 is visible in section on the embossing tool 10, the sign around 1.3 mm (dimension t) is raised.
  • the top area of the embossing element is rounded almost semicircular, the flank parts forming an angle of approximately 25 * to the vertical.
  • the rounded summit area 13 is polished so that the friction of the embossing plate (during the deformation) is reduced.
  • the flanks of the embossed webs form an angle of essentially 25 ° to the vertical.
  • the sheet thickness d is 0.8 mm and the thickness D of the plastic die is 2 mm.
  • the tool When the tool is first placed abruptly on the sheet metal surface, there is a slight deflection, the edges of the characters beginning to show. The tool is then moved towards the die with constant force.
  • the sheet metal is preferably deformed by stretching the material in the deformation area, the material starting to slide into the bulge that forms.
  • a sharp embossing of the edges of the embossing areas of the characters is due to the counter pressure that builds up. Due to the dimensioning specified according to the invention, the inner surfaces of characters are also sharply embossed.
  • the sheet bulges less overall than in the "static” stamping.
  • the dynamic embossing principle is implemented by hydraulic circuits based on the so-called DYNAPAK system. When a limit pressure is exceeded, a larger piston area is accelerated so that the roller stamp hits down. For precise guidance, the sheet metal can be fixed beforehand using a hold-down frame be clamped. In addition to a smaller bulge, the indentation of the characters is also smaller during dynamic embossing.
  • the embossing device according to the invention can equally well be used both for embossing individual characters one after the other with an embossing wheel and for simultaneously embossing a complete row of characters by means of a set of embossing wheels.
  • Electronic control is preferably used so that a high embossing frequency can be achieved.

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EP82730024A 1981-03-05 1982-03-05 Dispositif de marquage pour de différents signes Expired EP0060213B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82730024T ATE11247T1 (de) 1981-03-05 1982-03-05 Praegevorrichtung fuer verschiedene zeichen.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3109217 1981-03-05
DE3109217 1981-03-05
DE3139507 1981-09-30
DE19813139507 DE3139507A1 (de) 1981-03-05 1981-09-30 "praegevorrichtung fuer verschiedene zeichen"

Publications (2)

Publication Number Publication Date
EP0060213A1 true EP0060213A1 (fr) 1982-09-15
EP0060213B1 EP0060213B1 (fr) 1985-01-16

Family

ID=25791718

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82730024A Expired EP0060213B1 (fr) 1981-03-05 1982-03-05 Dispositif de marquage pour de différents signes

Country Status (2)

Country Link
EP (1) EP0060213B1 (fr)
DE (2) DE3139507A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104647926A (zh) * 2015-01-22 2015-05-27 徐浩达 一种打码器数字轮
WO2016037697A1 (fr) * 2014-09-08 2016-03-17 Tscheulin-Rothal Gmbh Dispositif d'estampage partiel d'opercules et procédé d'estampage partiel d'opercules
CN109291668A (zh) * 2018-10-29 2019-02-01 格力电器（武汉）有限公司 字符镶件结构、承板结构、模具、模具使用方法及机床

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2678015A (en) * 1950-05-25 1954-05-11 North American Aviation Inc Means for draw forming
GB946750A (en) * 1960-01-20 1964-01-15 Kenrick And Jefferson Ltd Improvements relating to numbering boxes
US3334504A (en) * 1965-05-25 1967-08-08 Saab Ab Cup-shaped diaphragm for hydraulic forming press
DE2146865A1 (de) * 1971-09-20 1973-04-05 Habra Werk Ott Kg Praegevorrichtung fuer kraftfahrzeugschilder
US3768619A (en) * 1971-12-29 1973-10-30 Addressograph Multigraph Direct image composing machine having means to prevent pressure overload of printing characters
FR2221284A1 (fr) * 1973-03-16 1974-10-11 Wirth Gallo & Co
DD115612A5 (fr) * 1974-02-04 1975-10-12
DE2603906A1 (de) * 1975-02-03 1976-08-05 Brandt Pra Inc Druckvorrichtung in gestalt einer mit druckraedern ausgestatteten drucktrommel

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3263791A (en) * 1965-02-17 1966-08-02 Dymo Industries Inc Multiple die group embossing arrangement for embossing machines
DE2134168B2 (de) * 1971-07-09 1977-02-17 Holzwerk Becker Kg, 6728 Germersheim Verfahren zum profilieren einer unter pressdruck formbaren materialbahn und pressbett zu dessen durchfuehrung

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2678015A (en) * 1950-05-25 1954-05-11 North American Aviation Inc Means for draw forming
GB946750A (en) * 1960-01-20 1964-01-15 Kenrick And Jefferson Ltd Improvements relating to numbering boxes
US3334504A (en) * 1965-05-25 1967-08-08 Saab Ab Cup-shaped diaphragm for hydraulic forming press
DE2146865A1 (de) * 1971-09-20 1973-04-05 Habra Werk Ott Kg Praegevorrichtung fuer kraftfahrzeugschilder
US3768619A (en) * 1971-12-29 1973-10-30 Addressograph Multigraph Direct image composing machine having means to prevent pressure overload of printing characters
FR2221284A1 (fr) * 1973-03-16 1974-10-11 Wirth Gallo & Co
DD115612A5 (fr) * 1974-02-04 1975-10-12
DE2603906A1 (de) * 1975-02-03 1976-08-05 Brandt Pra Inc Druckvorrichtung in gestalt einer mit druckraedern ausgestatteten drucktrommel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016037697A1 (fr) * 2014-09-08 2016-03-17 Tscheulin-Rothal Gmbh Dispositif d'estampage partiel d'opercules et procédé d'estampage partiel d'opercules
CN104647926A (zh) * 2015-01-22 2015-05-27 徐浩达 一种打码器数字轮
CN109291668A (zh) * 2018-10-29 2019-02-01 格力电器（武汉）有限公司 字符镶件结构、承板结构、模具、模具使用方法及机床

Also Published As

Publication number Publication date
EP0060213B1 (fr) 1985-01-16
DE3261891D1 (en) 1985-02-28
DE3139507A1 (de) 1982-09-23

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