EP0452572A1 - Dispositif d'essorage et procédé correspondant - Google Patents

Dispositif d'essorage et procédé correspondant Download PDF

Info

Publication number
EP0452572A1
EP0452572A1 EP90250100A EP90250100A EP0452572A1 EP 0452572 A1 EP0452572 A1 EP 0452572A1 EP 90250100 A EP90250100 A EP 90250100A EP 90250100 A EP90250100 A EP 90250100A EP 0452572 A1 EP0452572 A1 EP 0452572A1
Authority
EP
European Patent Office
Prior art keywords
pressure
hollow body
molded
drainage
bodies
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.)
Withdrawn
Application number
EP90250100A
Other languages
German (de)
English (en)
Inventor
Gerhard Rochow
Lothar Stroehmann
Werner Kliem
Gerhard Amborn
Ernst-Guenther Augustin
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.)
VEB ENTWICKLUNGS-UND MUSTERBAU BAUMECHANISIERUNG BERLIN
Original Assignee
VEB ENTWICKLUNGS-UND MUSTERBAU BAUMECHANISIERUNG BERLIN
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 VEB ENTWICKLUNGS-UND MUSTERBAU BAUMECHANISIERUNG BERLIN filed Critical VEB ENTWICKLUNGS-UND MUSTERBAU BAUMECHANISIERUNG BERLIN
Priority to EP90250100A priority Critical patent/EP0452572A1/fr
Publication of EP0452572A1 publication Critical patent/EP0452572A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • B28B3/003—Pressing by means acting upon the material via flexible mould wall parts, e.g. by means of inflatable cores, isostatic presses
    • 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
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/40—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material
    • B28B7/46—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material for humidifying or dehumidifying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/04—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using press rams
    • B30B9/10—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using press rams without use of a casing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/22—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using a flexible member, e.g. diaphragm, urged by fluid pressure

Definitions

  • the invention relates to a drainage device of the type specified in the preamble of claim 1 and a method for removing excess liquid.
  • Such methods and devices are known for example from DD-A 23 28 71 and from and on the other hand from DE-A 17 71 866.
  • the method described in DD-A 23 28 71 relates to the production of concrete products, such as concrete slabs.
  • the fresh concrete is poured into a casting mold and, after hardening in a vacuum chamber, separated from the excess liquid still remaining in the concrete slab.
  • a press ram acting on the concrete slab and a mold wall opposite the press ram designed as a slotted plate and acting as a counter-holder, presses the liquid out of the concrete slab under vacuum conditions, the concrete slab being arranged between the press ram and the mold wall.
  • the moisture is thus removed on the one hand due to the pressure of the ram acting on the plate and as a result of the conditions in the vacuum chamber from the concrete plate.
  • the invention has for its object to improve the method and the construction in a dewatering device of the type mentioned while eliminating the disadvantages mentioned so that the moldings can be dewatered quickly, easily and with a low reject rate.
  • the invention is based on the finding that a uniform, bilateral, in particular large area on the molded body, contact pressure on a, preferably plate-shaped, molded body, the excess liquid can be most efficiently pressed out of the molded body without changing the contours of the molded body or damaging it.
  • This also enables continuous, uniform drainage in an advantageous manner.
  • the uniformity of the pressure and thus that of the dewatering process is achieved by a hollow body lying against the molded body, which can be filled with a medium, and by a pressure element acting on the molded body, the pressure inside the hollow body being increased by additional measures with increasing contact pressure of the pressure element.
  • the pressure on the molded body is then generated both by the pressure element and by the stiffening and slightly elastically deforming hollow body.
  • the hollow body is arranged in a frame in the effective area of the pressure element connected to a drive device.
  • the hollow body which can be filled with a medium is provided on at least one side in the direction of action of the pressure element. This essentially completely covers the surface of the molded body against which it rests, the hollow body being connected to a compressor for the medium filling the hollow body. This achieves that while the excess liquid is pressed out of the building material body, the pressure forces acting on the molded body on both sides act evenly on the molded body.
  • the, in particular pneumatic, drive device and the hollow body have a common compressor and a control device.
  • the control device is provided between the compressor and the hollow body and increases the pressure in the hollow body with increasing contact pressure, in particular from a certain predetermined value.
  • the molded body is substantially uniformly loaded on both sides.
  • the control device has a check valve and a pressure reducing valve.
  • a plurality of hollow bodies and molded bodies arranged in the frame with respect to the pressure element are provided.
  • the excess liquid can be withdrawn in a shape-retaining manner at the same time by pressing out several shaped bodies.
  • the hollow bodies and the shaped bodies are arranged in the context of the drainage device in such a way that a shaped body or a hollow body follows alternately after the pressure element.
  • the dewatering device in each case has a dewatering body resting on one side of the shaped body, which essentially also has the shaped body on the adjacent side completely covered.
  • the squeezed out liquid can thereby drain in a targeted manner, the drainage body for this purpose having a surface formation, in particular provided with drainage grooves.
  • a hollow body or a dewatering body are alternately provided between the shaped bodies. This is based on the knowledge that it has proven sufficient for uniform loading of the shaped body to arrange the hollow body on only one side of the shaped body. As a result, the pressure lines and seals of the supply lines for the medium moved by the compressor are only required once for each shaped body to be arranged in the dewatering device. The result is favorable material and manufacturing costs of the drainage device according to the invention.
  • a part of the clamps in particular those provided in the lower region of the shaped bodies, is movably mounted in the frame.
  • the occurrence of moments between the frame and the clamps or the molded body is hereby prevented from the outset and thus also the danger possible undesirable deformations of the molded body.
  • the dewatering bodies and / or hollow bodies arranged between the shaped bodies are likewise mounted in the frame in the direction of action for the same reasons.
  • a force measuring device is provided in the effective area of the pressure element.
  • the outflow of the pressed-out liquid is facilitated in particular by the fact that the clamps, which are preferably arranged in the lower region of the shaped bodies, have smaller dimensions in the effective direction of the pressure element than the amount by which the shaped body extends in the effective direction.
  • the liquid can thus also emerge from the downward-facing surfaces, which may not be covered by the drainage or hollow body, and flow away in the space resulting from the different designs of the clamps and the molded body.
  • a particular advantage of the dewatering device is its economically advantageous applicability, since the most economical energy consumption and universal applicability represent typical performance parameters.
  • the molded body is placed in the effective area of the drainage device.
  • On one side is here at least one hollow body which can be filled with a medium is provided and completely covers the surface of the shaped body against which it rests.
  • the molded body is connected to the clamps and the pressure element then moves in the direction of the molded body until a predetermined contact pressure is reached on the molded body.
  • the pressure inside the hollow body is increased by further inflow of the medium into the hollow body.
  • the pressure inside the hollow body is in particular lower than the contact pressure of the pressure element.
  • the pressure inside the hollow body and the contact pressure are reduced or completely reduced by the pressure element and the molded body is removed from the dewatering device.
  • the shaped body is heated in a drying room for a certain time, so that the possibly still remaining moisture is removed from the shaped body by the evaporation favored by the heat development.
  • the process is characterized in particular by the fact that the moisture is withdrawn uniformly from the shaped body and the predetermined geometry of the shaped body is not changed.
  • Both the drainage device is simple in design and the necessary manipulations of the operating personnel during the process are reduced to a minimum.
  • the drainage performance is optimized while maintaining the dimensional stability kit, so that large numbers of panels can be dewatered with little effort.
  • a drainage device is shown in a side view and a top view in FIGS. 1a and 1b.
  • the dewatering device essentially consists of a frame 10, a pressure element 11 connected to a drive device 12, dewatering bodies 13, hollow bodies 14, a compressor 15 which is connected to the hollow bodies 14 via lines 16, and a control device 17.
  • the frame 10 which carries the individual parts of the dewatering device, has uprights 18 running perpendicular to its storage surface and upper or lower horizontal supports 19 and 20 extending transversely to the post 18.
  • the hollow bodies 14, the drainage bodies 13 and the gypsum boards 21 to be dewatered are provided between the upper horizontal support 19 and the lower horizontal support 20.
  • a hollow body 14, a plasterboard 21 and a drainage body 13 alternate.
  • a total of six gypsum boards 21, four hollow bodies 14 and three drainage bodies 13 are arranged in the frame 10.
  • a hollow body 14 acting as a counter element is thus firmly connected to the frame 10 adjacent to the post 18 on the side remote from the drive device 12. This arrangement of the individual elements ensures a compact and stable design of the drainage device.
  • the drainage body 13 and the hollow body 14 are firmly connected at their upper end to the upper horizontal support 19. At their lower end, however, they are mounted so that they can be guided in the effective direction of the pressure element 11 on the lower horizontal support 20, so that no harmful moments can occur in this area.
  • the gypsum boards 21 are fixed in the frame 10 via clamps 22.
  • the upper clamps 22 are arranged so that the plasterboard 21 can be inserted centrally between the hollow body 14 and the drainage body 13.
  • the lower clamps 22 are each connected to a guide means 23 which fixes the drainage body 13.
  • the water squeezed out of the gypsum board can flow downward favorably in the drainage bodies.
  • the guide means 23 is screwed to the hollow body 14 on one side and to the drainage body 13 on the other side.
  • the lower end of the drainage body 13 and the hollow body 14 and the guide means 23 are each mounted on the lower horizontal support 20 so that they can be guided in the effective direction. As a result, no moments deforming the gypsum board 21, the drainage body 13 or the hollow body 14 can occur in this area.
  • the pressure element 11 can be moved in the horizontal direction via the pneumatically designed drive device 12.
  • a force measuring device (not shown here) is arranged in the effective area, so that the forces acting on the gypsum board 21 can advantageously be determined.
  • the drive device 12 consists of a piston 24 and a pressure cylinder 25, wherein the pressure cylinder 25 is connected to the frame 10 at its post 18 with screws in relation to the forces occurring.
  • the lines 16 run from the pressure cylinder 25 and from the hollow bodies 14 to the compressor 15, the control device 17 being arranged between the compressor 15 and the hollow bodies 14.
  • the control device 17 essentially has a check valve and a pressure reducing valve.
  • a hollow body 14 is connected to the compressor 15 via two connections, so that the compressed air very quickly enters and exits the hollow body. can be moved out.
  • the clamps 22 are each adapted to the narrow end faces of the molded body 21 in such a way that the plasterboard 21 and the clamps 22 can be connected to one another in a form-fitting manner.
  • the gypsum board 21 can be fixed by pushing it laterally into the frame 10 or into the clamps 22, and can be arranged in accordance with the process.
  • the sandwich arrangement of the gypsum boards 21, the drainage body 13 and the hollow body 14 enables in a simple manner that a plurality of gypsum boards 21 can be freed of the excess water at the same time.
  • the gypsum boards 21 are first guided into the upper and lower clamps 22.
  • the pressure element 11 now moves vertically towards the hollow body 14 and presses it together with the gypsum boards 21, the drainage bodies 13 and the further hollow bodies 14.
  • the abutting surfaces of the gypsum boards 21, the drainage body 13 and the hollow body 14 are adapted to each other, so that the gypsum boards 21 are each loaded with a uniform contact pressure generated by the pressure element 11.
  • the compressed air generated by the compressor 15 is also pressed into the hollow body 14 by the control device 17.
  • This increases the pressure within the hollow body 14 and counteracts the pressure element 11 by virtue of their stiffening and slight elastic expansions generated due to the pressure.
  • the pressure on the gypsum board 21 is thereby increased further, the contact pressure of the pressure element 11 and the pressure in the hollow bodies 14 increasing up to a predetermined value.
  • the excess liquid in the shaped bodies 21 is almost completely pressed out during the pressing and runs down along the drainage body 13 into a collecting trough, not shown here, arranged between the lower cross members 20.
  • the pressure in the lines 16 is now reduced by releasing the pressure via the control device 17, so that the pressure element 11 moves back into its starting position and the gypsum boards 21 can be removed.
  • the gypsum boards 21 are now placed in a drying room which is heated until the residual moisture in the gypsum boards 21 has evaporated.
  • a drainage body 13 is shown in a side view and a top view in FIGS. 2a and 2b.
  • the drainage grooves 26 are arranged on both sides of the drainage body 13, so that liquid pressed out of the gypsum boards 21 resting on both sides of the drainage body 13 can drain downward favorably.
  • the embodiment of the invention is not limited to the preferred exemplary embodiment specified above. Rather, a number of variants are conceivable which make use of the solution shown even in the case of fundamentally different types.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Drying Of Solid Materials (AREA)
EP90250100A 1990-04-17 1990-04-17 Dispositif d'essorage et procédé correspondant Withdrawn EP0452572A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP90250100A EP0452572A1 (fr) 1990-04-17 1990-04-17 Dispositif d'essorage et procédé correspondant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP90250100A EP0452572A1 (fr) 1990-04-17 1990-04-17 Dispositif d'essorage et procédé correspondant

Publications (1)

Publication Number Publication Date
EP0452572A1 true EP0452572A1 (fr) 1991-10-23

Family

ID=8205228

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90250100A Withdrawn EP0452572A1 (fr) 1990-04-17 1990-04-17 Dispositif d'essorage et procédé correspondant

Country Status (1)

Country Link
EP (1) EP0452572A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB829944A (en) * 1955-03-29 1960-03-09 Otto Emele Process and apparatus for desiccating moist material
FR1381992A (fr) * 1963-02-19 1964-12-14 Uralita Sa Machine pour fabriquer des pièces en amiante-ciment
DE1225609B (de) * 1960-04-07 1966-09-29 Krauss Maffei Ag Filterpresse fuer hohe Druecke
US3825382A (en) * 1968-04-30 1974-07-23 Maxwell Davidson Ltd Filter press
GB1580633A (en) * 1977-08-27 1980-12-03 Mitsubishi Jukogyokk Diaphragm-contianing filter press
GB2108039A (en) * 1981-10-20 1983-05-11 St James Tile Company Ltd Making a fibre-reinforced tile
US4702870A (en) * 1986-05-20 1987-10-27 The United States Of America As Represented By The Secretary Of Agriculture Method and apparatus for forming three dimensional structural components from wood fiber

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB829944A (en) * 1955-03-29 1960-03-09 Otto Emele Process and apparatus for desiccating moist material
DE1225609B (de) * 1960-04-07 1966-09-29 Krauss Maffei Ag Filterpresse fuer hohe Druecke
FR1381992A (fr) * 1963-02-19 1964-12-14 Uralita Sa Machine pour fabriquer des pièces en amiante-ciment
US3825382A (en) * 1968-04-30 1974-07-23 Maxwell Davidson Ltd Filter press
GB1580633A (en) * 1977-08-27 1980-12-03 Mitsubishi Jukogyokk Diaphragm-contianing filter press
GB2108039A (en) * 1981-10-20 1983-05-11 St James Tile Company Ltd Making a fibre-reinforced tile
US4702870A (en) * 1986-05-20 1987-10-27 The United States Of America As Represented By The Secretary Of Agriculture Method and apparatus for forming three dimensional structural components from wood fiber

Similar Documents

Publication Publication Date Title
DE2817110A1 (de) Verfahren und vorrichtung zur herstellung von platten o.ae.
DE1584526A1 (de) Vorrichtung zur Herstellung vorgefertigter Wand- und Deckenplatten
DE2040849B2 (de) Vorrichtung zum giessen von polymerisierbarem material
EP0406899A1 (fr) Dispositif de pressage pour diminuer la quantité de liquide de caillé pendant la production du fromage
DE2558248B2 (de) Filterpresse
EP1605101A1 (fr) Procédé et dispositif pour la fabrication d'un panneau multicouche en béton
DE1758854B1 (de) Verfahren und vorrichtung zum waermefixieren von metall platten
EP0452572A1 (fr) Dispositif d'essorage et procédé correspondant
DE2504218C3 (de) Schalungskern zum Herstellen von raumgroßen Baukörpern, wie Raumzellen, aus Beton o.dgl.
DE2322139C3 (de) Batterieform und Verfahren zum Herstellen von Betonplatten
DE2716157C2 (de) Verfahren zum Herstellen von trockenem formbeständigen Holz
DE69711644T2 (de) Verfahren zum Herstellen von dünnen Platten aus einem giessbaren Material, insbesondere Gips, Vorrichtung zur Durchführung des Verfahrens und damit hergestelltes Produkt
DE3417288A1 (de) Vorrichtung zum aufbringen einer flaechenpressung auf fortschreitende werkstuecke
AT223519B (de) Vorrichtung zum Herstellen von Wellplatten
DE969428C (de) Einrichtung zur Kaltverarbeitung fluessiger Giessmassen
AT227136B (de) Vorrichtung zum Herstellen von Blöcken aus Leichtbeton
DE2819190A1 (de) Formvorrichtung, insbesondere spritzgussmaschine
DE6608041U (de) Walzgeruest mit vorrichtung zum ausbalancieren sowie zur beeinflussung der walzendurchbiegung.
DE2302172C3 (de) Einrichtung zum Herstellen von Betonbauelenienten, die aus zwei im Abstand voneinander angeordneten, durch eine Bewehrung miteinander verbundenen Betonplatten bestehen
DE2332007A1 (de) Pressform fuer ein kompressibles material
DE1801453C (de) Verfahren und Vorrichtung zum Herstellen eines Formwerkzeuges zum Erzeugen von in einer Fläche liegenden kugelförmigen Punktlinsen
DE2140268A1 (de) Giessform fuer das niederdruckgiessen grosser, glattwandiger gusstuecke
DE19546886A1 (de) Form zur maschinellen Herstellung von Betonformkörpern
EP0003227B1 (fr) Procédé pour tourner un élément préfabriqué en béton armé
AT24476B (de) Vorrichtung zur Herstellung von Stuck an Decken.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR NL

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19920424