US3205551A - Double toggle-lever press - Google Patents

Double toggle-lever press Download PDF

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Publication number
US3205551A
US3205551A US272139A US27213963A US3205551A US 3205551 A US3205551 A US 3205551A US 272139 A US272139 A US 272139A US 27213963 A US27213963 A US 27213963A US 3205551 A US3205551 A US 3205551A
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US
United States
Prior art keywords
ram
mould
toggle
levers
movement
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
US272139A
Other languages
English (en)
Inventor
Neubauer Rudolf
Welter Albert
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.)
Rheinmetall Industrie AG
Original Assignee
Rheinmetall 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 Rheinmetall GmbH filed Critical Rheinmetall GmbH
Application granted granted Critical
Publication of US3205551A publication Critical patent/US3205551A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/46—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes silicones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/26—Mechanisms or devices for locking or opening dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
    • B28B3/08—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form with two or more rams per mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • 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
    • B30B1/16—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 fluid-pressure means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • B30B11/04—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space co-operating with a fixed mould

Definitions

  • This invention relates to a double toggle-lever press for moulding loose material and particularly for making concrete blocks, such presses having rams adapted to be moved in opposite directions.
  • Such presses are costly, in particular in the case of hydraulically-operated presses, first because the drive has to be duplicated, and second because the drive requires special control arrangements. For that reason, use is generally made of compression from one side only and a so-called lloating mould. In that construction, the press mould is resiliently suspended and, when a certain applied moulding pressure is reached, the block of material is displaced in the mould and the friction of the material against the wall of the latter is reduced. It is true that a certain improvement can be achieved by that measure, but it is not possible to obtain a well-dened position of the neutral Zone.
  • the invention provides a double toggle-lever press having rams adapted to be moved in opposite directions and which, in spite of its comparatively simple structure, makes it possible to produce from loose material stone slabs having a substantially uniform density over their entire cross-section.
  • the toggle-levers are connected to an upper ram and to the drive therefor, for example the piston rod of a hydraulic cylinder, and, the levers, are also supported on ⁇ columns rigidly connected .to a lower ram, further, the end position of the upper ram is so dened by a stop that after that end position has been reached the lower ram is raised.
  • the advantageous effect is obtained that the upper ram exerts only an initial compression up to a predetermined pressure, after which the further compression is then eitected by the lower ram, whereby the neutral zone is eiectively transferred to the midlevel of 'the block or the zone can be brought to another desired position.
  • FIG. 1 shows the upper ram is raised position
  • FIG. 2 shows the upper ram .in rlower position.
  • the upper arms 12 of the toggle-lever system are connected in each case by way of bearing pins 14 to the columns 2 while the lower arms 13 engage the slide 5 by way of joint pins 15.
  • Above the lower ram 4 is a press table 16 with a mould 17, the lower opening of which is closed by the lower ram 4.
  • the position of the rams shown in the drawing is the upper poistion of the toggle-levers in which the slide 5 and the upper ram are in the highest position indicated by chain dotted line 1.
  • the mould 17 is iirst lled with an accurately weighed quantity of material, and the hydraulic cylinder 7 is energized to move the slide 5 with the ram 6 mounted therein towards the material to be moulded.
  • Theram 6 enters the mould 17 and compacts the material to an eX- tent determined by a pre-set applied pressure. That position is indicated by chain dotted line II. This depth of penetration of ram 6 into the mould is limited by vertically adjustable stops 18 arranged on the press frame.
  • the compression process of the invention is distinguished from that of known presses because in the latter an abutment for the initiation of the movement of the counter or lower ram is formed by the material itself.
  • that position of the press lram in which the pressure in the material has risen ⁇ so high that the moulding material itself becomes the point :of reaction and support and thereby causes the reversal of the direction of compression is not reached.
  • a far longer compression path could be covered by the upper ram 6, and the lower ram 4 could come into use at a very late point and have a very short travel, such a process would result in the neutral zone being undefined and not positioned in the middle of the block.
  • the slide 5 strikes the stops 18, the movement of and pressure applied by ram 6 is restricted and a suiciently large range of travel and pressure is left for the lower ram 4.
  • suitable adjustment of stops 18 accurate displacement of the neutral zone is possible.
  • the force exerted by the lower ram 4 is in the range of the maximum force developed by the toggle-levers, so that the compression work is obtained along a path of movement shorter than that of the upper ram.
  • the block, already precompressed vby the upper ram is once more compressed by the lower ram with a considerably greater pressure.
  • This final pressure can be regulated by an adjusting screw 19 on slide 5 and with which the descending piston rod comes into contact via a supporting plate 20 on the crosshead 9.
  • This arrangement serves as a safetyfdevice against possible destruction of, or damage to, the press which may occur in view of the forces produced in the extended position.
  • the lower ram is also adjustable in position.
  • a pair of tapered discs 21, the lower one of which is rotatable and is provided with a Vernier, permits very accurate adjustment.
  • the lower ram 4 is mounted on the piston rod of another hydraulic 3 cylinder 22 which is detachable.
  • the material has been completed and the pressure on the upper ram 6 has been released,vpressure medium is admitted into the hydraulic cylinder 22 and the moulded material is lifted out of the mould by upward movement of ram 4.
  • a toggle-lever press for moulding material com- After the moulding ofV prising in combination a mould for holding material to be moulded, rst and second rams movable towards and away from said mould, support columns secured to said second ram, a mechanism for moving said rst ram towards and away from said mould, toggle-levers connected between said mechanism, said rst ram and said support vcolumns and stop means for limiting the movement of said first ram towards said mould, said toggle levers comprising the sole drive for the reciprocal pressure movement of both rams.
  • a toggle-lever press for moulding material comprising a framework, a mould for holding material to be moulded, mounting means on said framework for said mould, support columns mounted in said framework and longitudinally movable with respect thereto, rst and secondv rams movable towards and away.
  • a toggle-lever press for moulding material comprising in combination a mould for holding material to be moulded, first and second rams movable towards and away from said mould, support columns, a slide member secured to said support columns, an adjustable mounting device on said slide device for receiving said second ram,
  • toggle-levers connected between Asaid mechanism, said rst ram and said support columns for transmitting movement to said second ram, and stop means for limiting the movement of said first ram towards said mould, said toggle levers comprising the sole drive for the reciprocal pressure movement of both rams.
  • a toggle-lever press for moulding material comprising in combination a mould for holding material to be moulded, rst and second rams movable towards and 4away from said vmould, support columns, a slide member secured to said support columns, mounting means 'on said slide member for said second ram, a mechanism ⁇ for moving'said second ram relatively to said slide member, a'further mechanism for moving said tirst ram to- 'wards and away from said mould, toggle-levers connected between said further mechanism, said rstram and'said support columns for imparting movement to said second ram, and stop means for limiting movement of said rst ⁇ ram towards said mould, said toggle jlevers Vcomprising the sole drive for the reciprocal pressure movement of both rams.
  • ⁇ A toggle-lever press for moulding material comprising in combination a mould for holding ⁇ material to be moulded,.irst and second rams movable towards and -away frornsaid mould, support columns, a slide mem- Aber secured to said columns, mounting means on said slide rmember for said second ram, a hydraulically-operated piston-cylinder mechanism carried by said slide .member vfor moving said secondram relatively to said Vsaid rst ram towards said mould, said toggle* levers comprising the sole drive for the reciprocal pressure movement of both rams.
  • a toggle-lever press for moulding ⁇ material comprising in combination a mould for holding material to be moulded, first and second rams movable towards and away from said mould, support columns secured to said second ram, a' mechanism for moving said rst ram towards and away lfrom said mould, toggle-leversinterconnected between said mechanism and said 'support columns for imparting movement to said second ram, adjustable stop means associated with said first ram for controlling pressure applied by said toggle-levers to said second ram, and stop means for limiting the movement of said rst ram towardsusaid mould, said toggle levers comprising the sole drive for the reciprocal pressure movement of both rams.
  • a toggle-lever press for moulding material comprising in combination, a mould for holding material to be moulded, rst and second rams movable towards and away from said mould, support columns secured to said second ram, a mechanism for moving said first ram towards and away from said mould, toggle-levers interconnected between said mechanism and said support columns for imparting movement to said second ram, and adjustable stop means for limiting movement of said first ram towards said mould, said toggle levers comprising the sole drive for the reciprocal pressure movement ⁇ of both rams.
  • a press for moulding materials comprising a press frame, a hydraulic cylinder and piston rod mounted on an upper part of-the frame, and the piston rod connected to a cross head, a pair of columns suspended in the frame, a slide guided on the columns and having an upper ram mounted thereon, a mould mounted in the frame having upperand lower openings, a lower ram mounted on the columns and cooperating with the lower opening of the mould to close ythat end thereof, toggle levers pivotally connected to the cross head and the slide, an upper arm connected at one end on the column and the other end to the toggle levers so that when the piston rod is actuated the cross head will force the slide downwardly and the lower ram upwardly simultaneously with lthe upper ram ybeing forced into the mould to compress the material in the mould bythe combined action of the vupper and lower rams.
  • a press according to claim 9 in which a cross piece isV provided mounted on the columns and on which the lower ram is secured. n y
  • a press according to claim 9 in which a plurality of stops are secured on the frame acting as abutments for the slide'.
  • toggle levers comprise two levers pivotally connected to each other with the upper arm connected to the pivotal connection of both levers of the toggle levers.
  • a press according to claim 9 in which a supporting plate and an adjusting screw are provided with the plate mounted on the cross head and the screw mounted ⁇ on the slide to act as a safety device for the press when the latter is in an extended position.
  • kA press in which a cross piece is provided mounted on the columns and on which the lower ram is secured, and in which means are provided connected to the lower ram and the cross piece to permit adjustment for the lower ram.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Presses And Accessory Devices Thereof (AREA)
US272139A 1962-04-12 1963-04-10 Double toggle-lever press Expired - Lifetime US3205551A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DER0032471 1962-04-12
DER0036420 1963-10-25

Publications (1)

Publication Number Publication Date
US3205551A true US3205551A (en) 1965-09-14

Family

ID=25991550

Family Applications (2)

Application Number Title Priority Date Filing Date
US272139A Expired - Lifetime US3205551A (en) 1962-04-12 1963-04-10 Double toggle-lever press
US352729A Expired - Lifetime US3278989A (en) 1962-04-12 1964-03-18 Toggle-lever press

Family Applications After (1)

Application Number Title Priority Date Filing Date
US352729A Expired - Lifetime US3278989A (en) 1962-04-12 1964-03-18 Toggle-lever press

Country Status (5)

Country Link
US (2) US3205551A (fr)
BE (2) BE630781A (fr)
DE (1) DE1459339A1 (fr)
GB (2) GB1039606A (fr)
NL (2) NL290611A (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3278989A (en) * 1962-04-12 1966-10-18 Rheinmetall Gmbh Toggle-lever press
US3523328A (en) * 1965-11-30 1970-08-11 Continental Gummi Werke Ag Apparatus for opening vulcanizing molds,especially for use in connection with rubber injection molding machines
US4302961A (en) * 1979-06-23 1981-12-01 Werner Leinhaas Press or similar machine tool
US4876878A (en) * 1987-03-24 1989-10-31 Werner Leinhaas Press with hydro-mechanical drive
US4944221A (en) * 1986-06-20 1990-07-31 E. Bruderer Maschinenfabrik Ag Articulated lever cutting and forming press
WO2001058654A1 (fr) * 2000-02-09 2001-08-16 Hydraform International Limited Dispositif de formation de blocs
US7124618B1 (en) * 2006-03-07 2006-10-24 Gm Global Technology Operations, Inc. Clamp assembly for hydroforming die
CN102773414A (zh) * 2012-04-06 2012-11-14 北京时代锐智科贸有限公司 一种无冒口铸造机
US20150273779A1 (en) * 2014-04-01 2015-10-01 Berthold Daub Press for machining a workpiece
US20180117654A1 (en) * 2015-03-31 2018-05-03 Hilmar Hubbes Deformation Method And Press

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59506072D1 (de) * 1994-04-27 1999-07-08 Dorst Masch & Anlagen Verfahren zur Herstellung von Presslingen aus pulverförmigem Material sowie entsprechende Presse
US10703663B2 (en) * 2017-03-20 2020-07-07 Owens-Brockway Glass Container Inc. Operating mechanism for a glassware forming machine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US420128A (en) * 1890-01-28 Brick-press
US862223A (en) * 1903-06-09 1907-08-06 Robert D Webb Compress.
US1062465A (en) * 1912-12-17 1913-05-20 Hill Cotton Compress Co Ltd Cotton-compress.
US1269769A (en) * 1917-10-03 1918-06-18 Leslie Denman Whitney Hydraulic press.
US2342772A (en) * 1939-01-09 1944-02-29 Sk Wellman Co Stripping apparatus
US2556951A (en) * 1944-06-05 1951-06-12 Stokes Machine Co Powdered material compacting press

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2565522A (en) * 1947-05-05 1951-08-28 Giddings & Lewis Molding machine
FR1109567A (fr) * 1954-10-05 1956-01-31 Jean Facon & Cie Ets Machine d'injection à double piston
GB916327A (en) * 1958-04-30 1963-01-23 Shipton & Company Ltd E Improvements in or relating to mould operating mechanism
US3015848A (en) * 1959-08-27 1962-01-09 Hollfritsch Hans Jet molding machines
US3103701A (en) * 1961-02-21 1963-09-17 Producto Machine Company Mold press
DE1459339A1 (de) * 1962-04-12 1968-11-28 Rheinmetall Gmbh Kniehebelpresse

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US420128A (en) * 1890-01-28 Brick-press
US862223A (en) * 1903-06-09 1907-08-06 Robert D Webb Compress.
US1062465A (en) * 1912-12-17 1913-05-20 Hill Cotton Compress Co Ltd Cotton-compress.
US1269769A (en) * 1917-10-03 1918-06-18 Leslie Denman Whitney Hydraulic press.
US2342772A (en) * 1939-01-09 1944-02-29 Sk Wellman Co Stripping apparatus
US2556951A (en) * 1944-06-05 1951-06-12 Stokes Machine Co Powdered material compacting press

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3278989A (en) * 1962-04-12 1966-10-18 Rheinmetall Gmbh Toggle-lever press
US3523328A (en) * 1965-11-30 1970-08-11 Continental Gummi Werke Ag Apparatus for opening vulcanizing molds,especially for use in connection with rubber injection molding machines
US4302961A (en) * 1979-06-23 1981-12-01 Werner Leinhaas Press or similar machine tool
US4944221A (en) * 1986-06-20 1990-07-31 E. Bruderer Maschinenfabrik Ag Articulated lever cutting and forming press
US4876878A (en) * 1987-03-24 1989-10-31 Werner Leinhaas Press with hydro-mechanical drive
WO2001058654A1 (fr) * 2000-02-09 2001-08-16 Hydraform International Limited Dispositif de formation de blocs
US7124618B1 (en) * 2006-03-07 2006-10-24 Gm Global Technology Operations, Inc. Clamp assembly for hydroforming die
CN102773414A (zh) * 2012-04-06 2012-11-14 北京时代锐智科贸有限公司 一种无冒口铸造机
CN102773414B (zh) * 2012-04-06 2014-08-27 北京时代锐智科贸有限公司 一种无冒口铸造机
US20150273779A1 (en) * 2014-04-01 2015-10-01 Berthold Daub Press for machining a workpiece
US20180117654A1 (en) * 2015-03-31 2018-05-03 Hilmar Hubbes Deformation Method And Press
US10556263B2 (en) * 2015-03-31 2020-02-11 Hilmar Hubbes Deformation Method and Press

Also Published As

Publication number Publication date
GB1061884A (en) 1967-03-15
DE1459339A1 (de) 1968-11-28
DE1459343A1 (de) 1968-11-28
GB1039606A (en) 1966-08-17
NL290611A (fr) 1965-06-10
BE630781A (fr) 1963-07-31
BE642573A (fr) 1964-05-15
NL132991C (fr) 1971-12-15
US3278989A (en) 1966-10-18
NL302752A (fr) 1965-10-25

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