EP0799691A2 - Presse isostatique - Google Patents

Presse isostatique Download PDF

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Publication number
EP0799691A2
EP0799691A2 EP97103570A EP97103570A EP0799691A2 EP 0799691 A2 EP0799691 A2 EP 0799691A2 EP 97103570 A EP97103570 A EP 97103570A EP 97103570 A EP97103570 A EP 97103570A EP 0799691 A2 EP0799691 A2 EP 0799691A2
Authority
EP
European Patent Office
Prior art keywords
press
tool
frame
connecting plates
guide
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.)
Ceased
Application number
EP97103570A
Other languages
German (de)
English (en)
Other versions
EP0799691A3 (fr
Inventor
Christian Rasch
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.)
DORST Technologies GmbH and Co KG
Original Assignee
DORST Technologies GmbH and Co KG
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 DORST Technologies GmbH and Co KG filed Critical DORST Technologies GmbH and Co KG
Publication of EP0799691A2 publication Critical patent/EP0799691A2/fr
Publication of EP0799691A3 publication Critical patent/EP0799691A3/fr
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/04—Frames; Guides
    • 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
    • B30B11/001—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a flexible element, e.g. diaphragm, urged by fluid pressure; Isostatic presses
    • B30B11/002—Isostatic press chambers; Press stands therefor

Definitions

  • the invention relates to an isostatic press for compacting powdery or granulated material, in particular ceramic material, according to the preamble of patent claim 1.
  • the pulverulent material is compressed under hydrostatic pressure within a tool which is firmly positioned in a press frame above a tool plate.
  • the closing force is usually applied via a hydraulic working cylinder, with which a guide cross-piece carrying a tool part or a tool part itself is moved on and against the tool.
  • the working cylinder executes a stroke after ejecting the previously produced molded article in order to bring the guide cross-member into the closed position, after which the actual closing force for compressing the ceramic molded part is again via the Working cylinder is applied.
  • the object of the invention is to provide an isostatic press which can be adapted to different applications in the manner of a modular system, but the press should nevertheless be of robust and simple construction.
  • the invention is characterized by a two-stage drive device for the movable tool parts on the guide crossmember, a rapid movement of the guide crossmember being effected by a crank mechanism and the closing force being applied by a short-stroke cylinder which is arranged at the free end of the locking lever of the crank mechanism and directly on the guide cross acts.
  • This short-stroke cylinder can also carry out additional tool movements, for example, the expansion of the press frame and the axial deflection of the pressed part in the case of isostatic To compensate for pressure reduction (pull-off movement). Since the pressing force is applied via the preload cylinder in the extended position of the crank drive, the crank drive can be dimensioned simply because the force is in the ideal position, i.e.
  • the simple crank drive means that the space required for this unit within the press can be reduced, which in turn affects the design of the press frame.
  • the press frame can be constructed from longitudinal bars designed as hollow profiles, which are connected by simple spacers, so that there is a stable press frame structure which is easy to assemble and disassemble due to the use of the screw connections. This allows a modular system to be implemented in conjunction with the specially selected drive device, which makes it possible, for example, to build a press for laboratory use with a single tool with a minimal degree of automation up to series production with multiple tools and a maximum degree of automation.
  • an essential feature is that the same pressing technology is used in all stages of construction and expansion. This means that the user can transfer the data and knowledge developed on a laboratory scale to series production without changing the pressing technology. This possibility of expanding from the laboratory press to the production press is of great advantage, with all interfaces being prepared for the expansion on the press.
  • the modular system manages with a few modular basic elements that can always be used when changing the press. When changing the press, for example, identical connecting plates, tool traverses, spacers and screw connections can be used and it is only necessary to replace the longitudinal spars adapted to a certain stroke with longer or shorter longitudinal spars. This enables universal conversion to a wide variety of applications, taking into account the customer's basic concept.
  • an isostatic press can thus be built up for different pressing processes, for example for the pressing processes “lifting out”, “lifting out” with “filling around the mandrel”, “ejecting”, “ejecting” with “filling around the mandrel”, “ Lowering “,” Lowering “with” filling around the mandrel “and, for example,” swivel crossbar ", in which the tool crossbar is pivotally arranged so that the tool can be pivoted relative to the guide crossmember per work cycle.
  • Fig. 1 shows a schematic representation of a press for the isostatic pressing of moldings made of ceramic powdery material, which comprises a press frame, generally designated 1, here in a vertical construction, which consists of two side frame halves 2 and 3, which at their upper and lower End connected by connecting plates 4 and 5.
  • a tool traverse 6 is fixed, in which the tool 7 is suspended and thus fastened.
  • a drive device for moving a guide crossmember 8 guided on the press frame 1 is arranged, the drive device having a mechanical locking device, preferably in the form of a mechanical articulated drive, which in the preferred embodiment is designed as a crank drive 9, on its connecting rod-type locking lever 10, a hydraulic preload cylinder designed as a short-stroke cylinder 11 is arranged.
  • the short-stroke cylinder 11 is arranged between the crank mechanism 9 and the guide crossmember 8 and thus acts directly on the guide crossmember 8.
  • FIG. 1 also shows a laterally arranged isostatic pressing device 12 and a hydraulic unit 13 and, to the right of the press, a control cabinet 14 for the press, a detailed description of which can be dispensed with here.
  • FIG. 1 shows an embodiment with only one mechanical locking device with a hydraulic pretensioning cylinder arranged above the tool 7, in which embodiment the crank mechanism has a stroke of 350 mm, for example.
  • Fig. 1 is also shown with a dash-dotted line, the retracted, i.e. lifted off the tool 7 position of the guide cross member representing or receiving the upper tool upper part, the position of the guide cross bar 8 in a fully drawn line showing the downward position, the actual closing force is generated by the extension stroke of the short-stroke cylinder and also the locking in the pressing position.
  • the short-stroke cylinder can also compensate for the expansion of the press frame and the axial deflection of the pressed part during isostatic pressure reduction (forcing movement).
  • crank mechanism is only applied by pretensioning and pressing force in the extended position of the lever 10, so that a good force absorption is ensured via the mechanical locking device. It should only be mentioned in passing that the crank drive is driven by means of a frequency-controlled worm gear motor.
  • the embodiment according to FIG. 2 differs from the press according to FIG. 1 only in the longer stroke of the crank mechanism 9, the height of the press frame being greater in adaptation to the larger stroke of the crank mechanism, here a stroke of 600 mm.
  • This can be done by simply retrofitting the press by replacing the shorter bars 15 of FIG. 1 with longer bars 15 ', the other components of the press apart from the longer locking lever 10' being the same components as in the press of FIG. 1 and to that extent are also provided with the same reference numerals.
  • Only the tool accommodated in the tool traverse 6 is of different types and is therefore designated by 7 '.
  • the press is additionally equipped with a lower crank mechanism 16 arranged between the connecting plates 5, the closing lever 17 of which acts on a guide cross member 19 via a downstream short-stroke cylinder 18 in order to move the lower tool parts.
  • 3 is constructed analogously to the press according to FIG. 1, but has, in adaptation to the two mechanical locking devices and the two short-stroke cylinders 11 and 18, longer bars 20, although here too the other basic press elements can be used in a modular manner.
  • crank drives 9 and 16 are arranged on both sides of the tool traverse 6 receiving the tool 7, the lower crank drive 16 being characterized by a larger stroke length of, for example, 600 mm, with a stroke of 350 mm of the upper crank mechanism 9 differs.
  • the structure is again identical, with the exception of the spars 22 of the press frame 1, which are longer due to the additional lower crank mechanism 21 including the short-stroke cylinder 18.
  • FIGS. 1 to 4 show very clearly the modular principle of the press according to the invention, in which only in adaptation to a different number of crank drives with one-sided or two-sided arrangement with respect to the tool traverse and / or a longer working stroke accordingly longer bars of the press frame are used, but the rest of the components can still be used.
  • FIG. 7 shows that the press frame 1 is constructed approximately in the construction of FIG. 1 from four longitudinal spars 15, two of which are connected in pairs by simple spacers 23 to the two side frame halves 2 and 3 (see Fig. 6). The two side frame halves 2 and 3 are finally connected to one another at the upper and lower end region of the bars 15 by connecting plates 4 and 5, respectively.
  • Fig. 5 shows that the upper and lower connecting plates 4 and 5 at the upper and lower ends of the corresponding spar 15 are arranged. As can be seen from FIG.
  • two connecting plates 4 and 5 are arranged in the upper end area and in the lower end area, between which the crank mechanism is suspended in each case by screw connections.
  • the spacers 23, as can best be seen from FIG. 6, are arranged just below or just above the corresponding connecting plates 4 and 5.
  • both the connecting plates 4 and 5 and the spacers 23 are connected via screw connections to the spars 15 and expediently via welded flanges 24 and 25. Because of these screw connections between the connecting plates, the spacers and the Holmen offers a quick change opportunity in the sense of the desired modular system.
  • FIGS. 8 and 9 show the tool traverse, which in turn is composed of two connecting plates 6a and 6b arranged opposite one another, which are connected to the bars 15 by means of fastening screw bolts.
  • the tool 7 is accommodated between the connecting plates 6a and 6b of the tool traverse 6, again by screwing and / or pinning.
  • the tool traverse 6 is in this case firmly positioned with respect to the bars 15 via the fastening bolts 26.
  • FIG. 8 finally shows a side view of the tool with tool block 26 and isostatic membrane 27 and the pressure medium supply 28 to the tool.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Press Drives And Press Lines (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Presses And Accessory Devices Thereof (AREA)
EP97103570A 1996-04-01 1997-03-04 Presse isostatique Ceased EP0799691A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19613047 1996-04-01
DE1996113047 DE19613047A1 (de) 1996-04-01 1996-04-01 Isostatische Presse

Publications (2)

Publication Number Publication Date
EP0799691A2 true EP0799691A2 (fr) 1997-10-08
EP0799691A3 EP0799691A3 (fr) 1997-10-15

Family

ID=7790187

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97103570A Ceased EP0799691A3 (fr) 1996-04-01 1997-03-04 Presse isostatique

Country Status (3)

Country Link
EP (1) EP0799691A3 (fr)
JP (1) JPH106090A (fr)
DE (1) DE19613047A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004085878A1 (fr) * 2003-03-24 2004-10-07 Evgenny Alexeevich Don Mecanisme de force axoide equilibre et presse axoide

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19846541A1 (de) * 1998-10-09 2000-04-13 Thyssen Krupp Ag Rahmen für eine Reifenheizpresse
JP5026117B2 (ja) * 2007-03-15 2012-09-12 住友重機械テクノフォート株式会社 プレスフレーム
JP5026116B2 (ja) * 2007-03-15 2012-09-12 住友重機械テクノフォート株式会社 プレスフレーム
CN104416105A (zh) * 2013-09-06 2015-03-18 天津市天锻压力机有限公司 具有四角调平功能的重型等温锻造压机
CN104416102A (zh) * 2013-09-06 2015-03-18 天津市天锻压力机有限公司 重型铝合金等温锻造液压机
CN104842579A (zh) * 2015-05-12 2015-08-19 天津太平洋超高压设备有限公司 粉末平板坯料的等静压模压液压机

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE145169C (fr) *
FR374317A (fr) * 1906-04-13 1907-06-10 Arthur Wilzin Presse à commande hydro-mécanique
US2820250A (en) * 1954-06-16 1958-01-21 Adamson United Company Press
DE1199482B (de) * 1956-01-10 1965-08-26 Weingarten Ag Maschf Anwendung einer Presse zum Herstellen von Karosserieteilen aus Blech zum Pressen von glasfaserverstaerkten Kunstharzteilen
US3143007A (en) * 1961-06-30 1964-08-04 Earl A Thompson Hydraulic assist for press
US3664784A (en) * 1970-01-19 1972-05-23 Pennwalt Corp Compacting press
US3853053A (en) * 1973-09-17 1974-12-10 Hobart Mfg Co Base assembly for a compactor
FR2254425A1 (en) * 1973-12-13 1975-07-11 Plastiremo Moulding press with a modular fabricated frame - capable of rearrangement to suit various mould and clamp tool sizes
DE2431585A1 (de) * 1974-07-01 1976-01-22 4 P Verpackungen Gmbh Ausgleichsvorrichtung fuer laengenaenderungen bei arbeitsmaschinen mit zuganker
IT1063668B (it) * 1976-07-22 1985-02-11 Bettonica Luigi Perfezionamenti alle presse idrauliche particolarmente destinate alla fabbricazione di piastrelle e piatti di materiale ceramico e simili
DE2935077C2 (de) * 1979-08-30 1986-04-10 Laeis GmbH, 5500 Trier Presse für keramische Formlinge
US4376744A (en) * 1980-09-02 1983-03-15 Ptx-Pentronix, Inc. Mechanical and fluid actuated ram for powder compacting press and method of compacting powder material
DD232670A1 (de) * 1984-12-27 1986-02-05 Thuringia Sonneberg Veb Presse
JPS6228220A (ja) * 1985-07-31 1987-02-06 Toyoda Gosei Co Ltd 型締装置
CH679139A5 (en) * 1989-07-06 1991-12-31 Scambia Ind Dev Ag Equipment for pressing and/or pulling with two fixture blocks
DE3928533C2 (de) * 1989-08-29 1995-04-06 Dorstener Maschf Ag Hydraulische Presse, insbesondere für die Baustein-Industrie
DE9312232U1 (de) * 1993-08-16 1993-10-28 Dorst - Maschinen- und Anlagen-Bau Otto Dorst u. Dipl. Ing. Walter Schlegel GmbH & Co, 82431 Kochel Presse zum Druckgießen keramischer Formlinge

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004085878A1 (fr) * 2003-03-24 2004-10-07 Evgenny Alexeevich Don Mecanisme de force axoide equilibre et presse axoide
US7409883B2 (en) 2003-03-24 2008-08-12 Evgenny Alexeevich Don Balanced power axoid mechanism and axoid press
CN100416134C (zh) * 2003-03-24 2008-09-03 叶夫根尼·阿列克谢耶维奇·顿 轴面平衡动力机构和轴面压力机

Also Published As

Publication number Publication date
EP0799691A3 (fr) 1997-10-15
DE19613047A1 (de) 1997-10-02
JPH106090A (ja) 1998-01-13

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