US3910096A - Coining press - Google Patents

Coining press Download PDF

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Publication number
US3910096A
US3910096A US506849A US50684974A US3910096A US 3910096 A US3910096 A US 3910096A US 506849 A US506849 A US 506849A US 50684974 A US50684974 A US 50684974A US 3910096 A US3910096 A US 3910096A
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US
United States
Prior art keywords
coining
ejector
coin
drive
press according
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.)
Expired - Lifetime
Application number
US506849A
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English (en)
Inventor
Alfred Debus
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.)
Theodor Graebener GmbH and Co KG
Original Assignee
Theodor Graebener GmbH and Co KG
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Filing date
Publication date
Application filed by Theodor Graebener GmbH and Co KG filed Critical Theodor Graebener GmbH and Co KG
Application granted granted Critical
Publication of US3910096A publication Critical patent/US3910096A/en
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Expired - Lifetime legal-status Critical Current

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    • 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
    • B44B5/0052—Machines or apparatus for embossing decorations or marks, e.g. embossing coins by pressing
    • B44B5/0057—Machines or apparatus for embossing decorations or marks, e.g. embossing coins by pressing using more than one die assembly simultaneously
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/02—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by lever mechanism
    • B30B1/08—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by lever mechanism operated by fluid-pressure means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/10—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism
    • B30B1/14—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism operated by cams, eccentrics, or cranks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0029—Details of, or accessories for, presses; Auxiliary measures in connection with pressing means for adjusting the space between the press slide and the press table, i.e. the shut height

Definitions

  • ABSTRACT [30] Foreign Application Priority Data
  • the invention relates to a coining press having a coin- Sept. 18, 1973 Germany 2346810 ing drive comprising a power'transmimng element provision for feeding coin blanks via a table to a ring [52] us. c1. 72/344; 72/359; 72/451 collar, a driven male die and an ejector die which are [51 1m. (:1.
  • the driven male die of commercially available coining presses is disposed above the table and the ejector die or ram is disposed therebelow.
  • the coining drive takes the form of a toggle drive disposed in the top part of the press, resulting in a relatively short element for transmitting the power to the driven male die.
  • a coining drive in the form of a toggle drive is disposed in the bottom part of the machine, and so a frame-like power-transmitting element is necessary to drive the driven male die from above.
  • the ejector drive in both of these known constructions is a cam drive which so actuates the ejector die or ram that during coining it moves back into the ring collar by the amount necessary to maintain the correct coining pressure commensurate with the stroke made by the coining drive, whereafter the ejector die or ram rises to eject the coined coin blank.
  • the coinfeeding and coinremoving facilities take the form of gripper tongs which place the blanks seriatum on the ring collar and remove them after coining.
  • a disadvantage of the bottom toggle drive construction is that the machine casing has to be relatively heavy, yet relatively severe vibrations are unavoidable.
  • the machine casing needed for the other construction is lighter, but the frame-like transmission element projects, so that a relatively large weight has to be moved because of the required rigidity, leading to corresponding vibrations in the press.
  • FIG. 1 is a vertical section through a coining press on the section station A-B of FIG. 3;
  • FIG. 2 is another vertical section on the section station C-D of FIG. 3;
  • FIG. 3 is a plan view of the press
  • FIG. 4 is a view to an enlarged scale of part of the coining press when in its change or ejection position
  • FIG. 5 shows the same part to the same scale when in the coining position. 7
  • a coining drive comprising a toggle transmission shown generally at 5, a rotatable crankshaft 6, a connecting rod 7 and two toggle levers 8, 9.
  • the toggle levers 8, 9 bear by way of pivot pins "10-12 on a stationary part 13 of the coining drive and drive a powertransmitting element shown generally at which is basically in the form of a push-rod, comprising two portions and is a means of enabling a coining stroke to be made-which is directed away from the place where the coining drive is disposed.
  • a bearing member 14 Associated with the power transmitting element 20 is a bearing member 14, a guide member 15 havinglateral projection 15a, and sleeve-like bearings 15b, a pushr-rod 16, a base plate 17 (FIG. 4), a male-die plate 18 and a male-die receiving member 19.
  • the push-rod 16 makes in one example a stroke of e.g. twenty millimeters of which, for instance, 13 millimeters are backlash because of a gap 16b between the push-rod l6 and the base plate 17 (see FIG. 4).
  • the gap 1612 represents a boundary between the top part and bottom part of the power-transmitting element 20.
  • the top part 17-19 thereof and the larger member of the push-rod 16 are already disposed in a machine table casing shown generally at 21 which comprises a number of elements including a table 22 and a guide bush 23. Guided therein is a driven male die 24 whose rearward end is retained by the receiving member 19.
  • the base plate 17 has a collar 17a which is disposed in a recess 21a in a casing 21 and which, when the parts 17-19, 24 are forced down, abuts a damping ring 21b.
  • the thickness of the male die plate 18 can be so selected that when the collar 17a is in engagement with the damping ring 2112, the coining surface of the male die 24 is flush with the top of the bush 23 that is to say of the table 22.
  • a ring collar or ferrule 25 which is secured by appropriate means 26 is disposed above the table 22 at a distance or height therefrom slightly greater than the thickness of a coin blank and extends around the coining station or area.
  • An ejector ram 28 extends into the passage or orifice of the ring collar or ferrule 25 and is free to move between the ejection position shown in FIG. 4 and the coining position shown in FIG. 5.
  • the ejector ram 28 is secured. by means of a receiving member 29 to a multiple-element adjusting member 30 which provides fine angular adjustment of ejector die 28 and which has a collar 30a.
  • a spring is received in a recess 31a in a bearing member 31 and cooperates with a spring 31b to provide damping.
  • the bearing member 31 serves to guide the adjusting member 30.
  • the upward stroke of the adjusting member 30 and therefore of ejector 28 is limited by a multiple-element abutment 32 which is mounted. in a stationary yoke 33 (FIGS. 1, 2 and 3) and is adjustable relatively thereto by means of a worm drive 34.
  • the abutment 32 is adjusted to the required position by means of shims or the like 35 and is secured by members 36 and a locking nut 37.
  • a stationary yoke 33 is connected by Way of throughbolts 38, 39 to the stationary part 13 of the toggle transmission 5, so that a stationary frame 13, 33, 38, 39, is formed which is symmetrical of the coining operation and via which the linesof stress are closed on one another during coining.
  • ejector rod 40 Guided in abutment 32 are an ejector rod 40 and a transfer rod 40 which is spring-biased so as to be in continuous engagement with the adjusting member 30.
  • the rod 40 By means of a pivoted rocker arm 42 carried by a bearing frame 43, the rod 40 is connected to a thrust rod 44 of a pneumatic element 45 which is able to force the ejector die 28 downwardly.
  • the above noted parts 30, 40, 41, 42, 44, 45 are for ease referred to as the ejector drive means.
  • the force thus applied to the ejector ram 28 is in the opposite direction to the coining stroke but is less than the force producing the coining stroke.
  • the bottom limit of the stroke of the ejector die 28 is controlled by an adjusting screw 46 which limits the pivoting of the rocker arm 42. Adjusting screw 46 is able to be adjusted so that the coining surface of ejector die 28 is substantially in alignment with the underside of the ring collar 25.
  • a step-by-step feed mechanism 50 Received in the casing 21 is a step-by-step feed mechanism 50 which is shown in diagrammatic form and which drives an indexing table 51 which is disposed directly above the table 22 and which is formed at its peripheral parts with a number of recesses 52 which in shape match the shape of the coin blanks and which are angularly separated from one another at a distance corresponding to the stepping-on angle of the indexing table 51.
  • a storage shaft or chute 54 Disposed at a stopping place of the recesses 52 is a storage shaft or chute 54 which extends above the table 22 and which receives coin blanks by means of a shaker conveyor (not shown).
  • the indexing table 51 is not covered by the chute 54, the collar and the securing means 26, it has a transparent cover 57 so that the indexing table 51 cannot be handled accidentally and both the coin blanks and the finished coins are protected against dust and other foreign bodies.
  • felt strips or other low-friction underlays can be provided on the table 22, and the distance which the coins and the blanks are conveyed on the table can be reduced by moving the chute 54 as close to the coining section as possible. Similar considerations apply in respect of a removal shaft or chute (not shown) for finished coins, such chute also being disposed at a stopping place of the recesses 52 in the table.
  • the novel coining press operates as follows:
  • One blank at a time goes from the stack of blanks in the chute 54 (FIG. 2) into a turntable recess 52 and is conveyed backwards on the table 22 until a blank 55 comes below the ring collar or ferrule 25 on to the male die 24 (FIG. 4).
  • the timing of the feed mechanism 50 is so staggered relatively to the timing of the toggle transmission 5 that there is no jamming or blocking of the index table 51.
  • the driven male die 24 rises, engages the coin blank 55 above it and pushes the same into the ring collar 25 against the force which the ejector drive 30, 40, 41, 42, 44, is applying to the ejector ram 28.
  • the adjusting member 30 abuts the abutment 32, the ejector ram 28 forms a relatively rigid stop or bumper against the still advancing driven die 24, so that the blank 55 interposed between the members 24 and 28 is cold extruded and given the required coining (FIG. 5).
  • the stroke of the male die 24 is 7 mm, corresponding to a push-rod stroke of 20 millimeters less 13 millimeters backlash.
  • the push-rod 16 then immediately descends so that the ejector ram or die 28 ceases to experience pressure opposing the pressure of the ejector facility 30, 40, 41, 42, 44, 45.
  • the member 28 28 descends, disengages the coined coin 55' from the ring collar 25 in its descent and lowers the coin 55 to the level of the table 22, corresponding to a return of the system to the ejection position shown in FIG. 4.
  • the feed mechanism 50 then operates and the index table 51 moves on by one step so that the finished coin 55' is moved sideways out of the coining zone.
  • the system has returned to its normal position.
  • the finished coins disposed on the indexing table after the coining station continue to be carried along on the indexing table until reaching the ejector chute, whereafter the empty recesses 52 are ready to receive fresh coin blanks 55.
  • the coining press described above has the very high output of 350 coining operations per minute. Since the force transmitted to the driven die 24 is transmitted over a short distance, the moving weights are relatively small; also, since the stresses of coining are closed over a short distance by way of the stationary frame 13, stationary hoke 33, and through bolts 38, 39, there is little vibration. The machine is indeed so quiet in operation that no prepared foundation work is needed for it and it can be set up on the floor of buildings above ground level. Another advantage is that the coining press takes up a very small base area.
  • a coining press having a coining drive comprising a power-transmitting element, means for feeding coin blanks via a table to a ring collar, a driven male die and an ejector die which are opposed and adapted to be pressed together by means of the coining drive with the interposition in each coining operation of a coin blank retained by the ring collar, and having an ejector and an ejector drive means for removing the coined coin blanks characterized in that the coining drive is disposed in the bottom part of the press and each stroke at the coining drive is made upwardly, whereas the ejector drive means is disposed in the top part of the press and the stroke of the ejector drive is made downwardly; and the power-transmitting element has a top portion the downwardly directed stroke of which is so limited that, before the coin blank feeding and coin blank ejector means operate, the coining surface of the driven male die is flush with the table.
  • the ejector drive means is a pressure source which in operation is operative continuously on the ejector die, the ejector pressure being less than the coining pressure; and the ejector die being adapted to move freely between the coining position and the ejection position and is always returned by the continuous pressure of the ejector drive means into the ejection ement the pressure of which acts via intermediate ele- I ments on the ejector die.
  • the coining press according to claim 1 characterized in that a stationary part of the coining drive, a yoke and two through bolts form a stationary press frame which is symmetrical of the coining station and by way of which the stress lines arising from the coining operation are closed.
  • the coin blank feeding and coin blank ejector means comprise a step-by-step feed mechanism having an index table formed with recesses to receive the coin blanks and the coined coin blanks; and the plane of said index table is disposed perpendicularly to the direction of coining, the feed mechanism advancing the recesses towards and beyond the ring collar at a predetermined rate.
  • the coin-feeding means comprise a storage chute for the coin blanks, the chute extending above the table and the index table.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Adornments (AREA)
  • Forging (AREA)
US506849A 1973-09-18 1974-09-17 Coining press Expired - Lifetime US3910096A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2346810A DE2346810C3 (de) 1973-09-18 1973-09-18 Münzprägemaschine

Publications (1)

Publication Number Publication Date
US3910096A true US3910096A (en) 1975-10-07

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ID=5892854

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Application Number Title Priority Date Filing Date
US506849A Expired - Lifetime US3910096A (en) 1973-09-18 1974-09-17 Coining press

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US (1) US3910096A (en))
JP (2) JPS5077972A (en))
DE (1) DE2346810C3 (en))
GB (1) GB1476757A (en))

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2125137A1 (es) * 1995-06-19 1999-02-16 Tuceca S L Maquina grabadora-expendedora de medallas con motivos alegoricos acuñados.
US5953950A (en) * 1997-05-23 1999-09-21 Japan, Represented By Director-General, Mint Bureau, Ministry Of Finance Method and apparatus for manufacturing disk products having helical ridges
WO2001076789A1 (en) * 2000-04-10 2001-10-18 Intri-Plex Technologies, Inc. Making integral heat spreader by coining
CN103963530A (zh) * 2014-05-14 2014-08-06 苏州天脉导热科技有限公司 一种简易型板材印花装置
CN111465506A (zh) * 2017-10-17 2020-07-28 许勒压力机有限责任公司 用于冲压圆形件的冲压机和方法

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4044592A (en) * 1976-05-19 1977-08-30 Gulf & Western Manufacturing Company Coining die assembly
DE3510698A1 (de) * 1985-03-23 1986-09-25 L. Schuler GmbH, 7320 Göppingen Vorrichtung zur vereinzelung und zur zufuhr von praegestuecken an einer praegepresse
GB2234196B (en) * 1989-07-22 1993-02-17 Verson Hme Ltd Press and method of working material
DE4239617A1 (de) * 1992-11-25 1994-05-26 Lothar Wanzke Prägeeinrichtung
DE4411900C2 (de) * 1994-04-07 2002-07-04 Graebener Pressensysteme Gmbh Prägepresse, insbesondere Münzprägepresse
DE4446221A1 (de) * 1994-12-23 1996-06-27 Schuler Pressen Gmbh & Co Münzprägepresse
CN107443486B (zh) * 2017-07-31 2019-06-21 烨德实业(深圳)有限公司 一种连续的模切自动出料的模切智能装置
DE102017007900B3 (de) 2017-08-19 2018-11-29 Sack & Kiesselbach Maschinenfabrik Gmbh Vorrichtung und Verfahren zum Prägen von Münzen oder Medaillen
DE102017010913B3 (de) 2017-11-25 2019-01-24 Sack & Kiesselbach Maschinenfabrik Gmbh Verfahren zum Betreiben einer Prägevorrichtung und Prägevorrichtung
DE102019133806A1 (de) * 2019-12-10 2021-06-10 B.H. Mayer's Kunstprägeanstalt GmbH Münze oder Medaille

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US340515A (en) * 1886-04-20 macombee
US1965670A (en) * 1930-07-17 1934-07-10 Harry A Schauer Apparatus for forming or coining metal objects
US2313843A (en) * 1937-11-04 1943-03-16 William H Keller Inc Riveting tool
US3661008A (en) * 1970-03-17 1972-05-09 Wickman Mach Tool Sales Ltd Presses

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US340515A (en) * 1886-04-20 macombee
US1965670A (en) * 1930-07-17 1934-07-10 Harry A Schauer Apparatus for forming or coining metal objects
US2313843A (en) * 1937-11-04 1943-03-16 William H Keller Inc Riveting tool
US3661008A (en) * 1970-03-17 1972-05-09 Wickman Mach Tool Sales Ltd Presses

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2125137A1 (es) * 1995-06-19 1999-02-16 Tuceca S L Maquina grabadora-expendedora de medallas con motivos alegoricos acuñados.
US5953950A (en) * 1997-05-23 1999-09-21 Japan, Represented By Director-General, Mint Bureau, Ministry Of Finance Method and apparatus for manufacturing disk products having helical ridges
AU748470B2 (en) * 1997-05-23 2002-06-06 Japan, Represented By Director-General, Mint Bureau, Ministry Of Finance Method and apparatus for manufacturing disk products having helical ridges
WO2001076789A1 (en) * 2000-04-10 2001-10-18 Intri-Plex Technologies, Inc. Making integral heat spreader by coining
US20040123639A1 (en) * 2000-04-10 2004-07-01 Anderson Russell J. Making integral heat spreader by coining
US7506527B2 (en) 2000-04-10 2009-03-24 Honeywell International, Inc. Making integral heat spreader by coining
CN103963530A (zh) * 2014-05-14 2014-08-06 苏州天脉导热科技有限公司 一种简易型板材印花装置
CN111465506A (zh) * 2017-10-17 2020-07-28 许勒压力机有限责任公司 用于冲压圆形件的冲压机和方法
US11453039B2 (en) 2017-10-17 2022-09-27 Schuler Pressen Gmbh Stamping press and method for stamping a round blank

Also Published As

Publication number Publication date
JPS5077972A (en)) 1975-06-25
DE2346810C3 (de) 1978-08-10
DE2346810B2 (de) 1977-11-24
DE2346810A1 (de) 1975-03-27
JPS59162119U (ja) 1984-10-30
GB1476757A (en) 1977-06-16
JPH0114352Y2 (en)) 1989-04-26

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