EP0533021A2 - Presse de compactage et procédé pour son utilisation - Google Patents

Presse de compactage et procédé pour son utilisation Download PDF

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Publication number
EP0533021A2
EP0533021A2 EP92115308A EP92115308A EP0533021A2 EP 0533021 A2 EP0533021 A2 EP 0533021A2 EP 92115308 A EP92115308 A EP 92115308A EP 92115308 A EP92115308 A EP 92115308A EP 0533021 A2 EP0533021 A2 EP 0533021A2
Authority
EP
European Patent Office
Prior art keywords
displacement
mold plate
upper punch
cleaning
mold
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
EP92115308A
Other languages
German (de)
English (en)
Other versions
EP0533021A3 (en
Inventor
Hans Ulrich Hauser
Hans Joachim Zenner
Martin Mick
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.)
Laeis Bucher GmbH
Original Assignee
Laeis Bucher 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 Laeis Bucher GmbH filed Critical Laeis Bucher GmbH
Publication of EP0533021A2 publication Critical patent/EP0533021A2/fr
Publication of EP0533021A3 publication Critical patent/EP0533021A3/de
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
    • B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
    • B28B13/0215—Feeding the moulding material in measured quantities from a container or silo
    • B28B13/023—Feeding the moulding material in measured quantities from a container or silo by using a feed box transferring the moulding material from a hopper to the moulding cavities
    • 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
    • B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
    • B28B17/0063—Control arrangements
    • B28B17/0081—Process control
    • 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
    • B30B11/005—Control arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0082—Dust eliminating means; Mould or press ram cleaning means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/30—Feeding material to presses
    • B30B15/302—Feeding material in particulate or plastic state to moulding presses
    • B30B15/304—Feeding material in particulate or plastic state to moulding presses by using feed frames or shoes with relative movement with regard to the mould or moulds

Definitions

  • the invention relates to a press for linear compression of powder or granular materials with at least one upper and lower punch, a mold plate and a sliding box on the mold plate, which are controllable in their mutual position, and with at least one cleaning element for cleaning and / or Wetting the upper and / or lower stamp.
  • vertical presses are usually used in the pressing of powdered or granular materials into dimensionally accurate molded parts, which have a moving press die, a forming table as a support for the forming die and a fixed or movable one with which Have press stamp connected second stamp.
  • a moving press die a forming table as a support for the forming die
  • a fixed or movable one with which Have press stamp connected second stamp When filling the mold cavity, after removing the molded product produced in the previous pressing, it is filled with a horizontally displaceable filling box by sliding this filling box over the top of the mold cavity, the filling material falling into the mold cavity.
  • a gripper is usually attached to the filling box, which grips the molded part (s) previously pressed and carries it out of the press to the front during the new filling process and places it on a table in front of the press, on a conveyor belt or the like.
  • the invention has for its object to avoid the disadvantages and problems mentioned and to clean the surfaces of the press ram optimally regardless of the height of molds and rams and the filling height of mold cavities.
  • this is achieved in a press of the type mentioned at the beginning by cleaning elements which are mounted on the filling box and by position controls for the filling box and at least one of the elements upper punch, lower punch and shaped plate, which are designed such that the cleaning elements when the filling box is displaced , optimally clean surfaces to be cleaned of upper and / or lower punches.
  • a displacement transducer is provided for displacements (S1) of the upper punch, (S2) of the mold plate and (x) of the filling box, furthermore storage means which contain the setpoints for the displacements (S1) of the upper punch and ( S2) the form plate as preset functions of the displacement (x) of the filling box, as well as position controls signal-connected to the displacement transducers, which determine the mutual position of the upper stamp, lower stamp and Control the mold plate according to the specified functions of displacement (x).
  • a method for an advantageous operation of the press is characterized in that the displacement of the filling box serves at the same time for filling a mold of the mold plate and for cleaning the surface of the upper die, and that the constant function (S2 (x)) for the displacement of the mold plate before the start of the filling process is determined in accordance with the required filling height of the mold and that the initial value of the function (S1 (x)) for the displacement of the upper die, in accordance with the determined constant (S2) of the displacement of the mold plate, is selected and used such that the surface of the Upper stamp is cleaned optimally by the cleaning elements.
  • the constant function (S2 (x)) for the displacement of the mold plate before the start of the filling process is determined in accordance with the required filling height of the mold and that the initial value of the function (S1 (x)) for the displacement of the upper die, in accordance with the determined constant (S2) of the displacement of the mold plate, is selected and used such that the surface of the Upper stamp is cleaned optimally by the cleaning elements.
  • Another method for operating the press is characterized in that the displacement of the filling box serves at the same time for filling a mold of the mold plate and for cleaning the surface of the upper punch, that the function (S2 (x)) for the displacement of the mold plate corresponds to one is made variable across the cross-section of the shape of the filling level and that the function (S1 (x)) for the displacement of the upper punch is formed as a sum of two components (S11 (x), S12 (x)), the first of which (S11 (x )) an inclined position of the upper punch surface and its second (S12 (x)) takes into account the variable course of the function (S2 (x)) for the displacement of the mold plate with regard to the optimal cleaning function of the cleaning elements.
  • the advantages achieved by the invention are that the handling of the press is considerably simplified and existing press controls can be used without problems to control the cleaning elements can. This makes it possible to always have the cleaning elements in the optimal position without additional adjustment effort. This is also the case when filling is wedge-shaped.
  • the cleaning roller automatically follows the crooked upper stamp plate.
  • time can be saved in the production cycles in that the upper position of the upper plunger, controlled in automatic operation, always remains at an optimal distance from the press mold plate and the paths to be traveled are never longer than necessary.
  • the position control system remains switched on continuously prevents the filling box with its slide from colliding with the upper punch because a safety function is installed above the cleaning elements so that the press is switched off early if there is a risk of collision.
  • the illustrated press device essentially comprises a hydraulically operated four-column press 1.
  • a mold carrier element 4 which is also guided on the columns 2, is mounted.
  • the mold carrier element 4 has a hydraulic drive 4 ′ arranged inside the yoke 3 for lowering.
  • the mold carrier element 4 is assigned a mold plate 5 which is located at the lower end of the columns 2 and which can also be displaced along the columns 2 and which can accommodate a mold carrier element which is displaceable together with the mold plate 5.
  • the mold carrier element is designed as a hollow mold, in which an upper punch 6 and a lower punch 7 engage.
  • the upper punch 6 and the lower punch 7 together with the mold carrier element of the mold plate 5 enclose the product to be pressed.
  • the displaceable mold plate 5 is raised and lowered by drive means, not shown, the lower punch 7, however, is not displaceable.
  • a hollow mold 5 'of the mold carrier element in the mold plate 5 is filled with molding material through a filling box 12 which is horizontally displaceable on the molding plate 5 by means of a hydraulic system 13 and from outside the columns 2 via the mold plate 5 as support the molding material via the mold 5 'pushes the mold carrier element.
  • the pressing material can be ceramic sand, for example, which is to be processed into refractory stones.
  • the operation of the press corresponds essentially to that of conventional presses, as described for example in DE-OS 27 41 800.
  • a brush roller 14 is mounted on the filling box 12 on the side facing the upper punch 6 and cleans or wets the downward-facing surface of the upper punch 6 during the horizontal movements of the filling box 12. These horizontal displacements are measured by a displacement transducer 15 mounted on the filling box 12, which sensor outputs corresponding electrical signals to a position control 17 via a line 16. In a similar way, a further displacement transducer 18 or 19 is mounted on the mold carrier element 4 and on the mold plate 5, which transmit the electrical signals corresponding to the vertical displacements of these elements 4 and 5 via lines 20 and 21 to the position control 17.
  • the position control 17 controls a hydraulic control 22 which controls the drive 4 'for the upper punch 6 via a line 23.
  • Another hydraulic drive is provided for the vertical movement of the mold plate 5, but is not shown in FIG. 1. This further hydraulic drive is also controlled by the hydraulic control 22 via a line (also not shown).
  • the mold plate 5 is positioned higher or lower by the position control 17 relative to the lower punch 7, so that the correct nominal size of the finished pressed stone results from the thickness of the filling.
  • the brush roller 14 mounted on the filling plate 12 on the mold plate 5 changes its distance from the upper punch 6. So that the upper punch 6 is nevertheless optimally cleaned or wetted, 17 storage means in the position control for corresponding desired positions of the upper punch 6 intended. From these storage means, the upper punch 6 of the brush roller 14 is traversed via the hydraulic control 22 and the drive 4 'in order to restore its optimal relative position.
  • setpoints for displacements S1 of the upper punch 6, S2 of the mold plate 5 and x of the filling box 12 can also be used for more complicated press molds and operating modes Save and use predefined functions of time or displacement x of the filling box.
  • a suitable constant is selected as the function S2 (x) for the displacement of the mold plate 5 and for the function S1 (x) for the displacement of the upper punch 6. If, on the other hand, the pressing surface of the upper punch 6 is inclined against the direction of the displacement of the filling box 12, then a variable linear function adapted to this inclination must be selected for the function S1 (x).
  • both the constant function S2 for the displacement of the mold plate 5 and the initial value of the function S1 (x) for the displacement of the upper die 6 can now easily be stored in the control means 17 also change by this value c such that the distance between the lower edge of the upper punch 6 and the upper edge of the mold plate 5 does not change its optimal value for the filling and cleaning process.
  • the function S2 (x) for the molding plate 5 can be adapted to this filling height in a variable form.
  • S11 (x) is adjusted in accordance with the inclined position of the surface of the upper punch 6 and S12 (x) compensates for the variable course of the vertical movement of the mold plate 5.
  • the upper punch 6 via its mold carrier element 4 and the mold plate 5 with the filling box 12 at the same time moved so that the brush roller 14 always optimally touches the upper punch 6 for cleaning or wetting.
  • FIG. 2 shows a sensor 25 connected upstream of the brush roller 14, with which obstacles can be detected during the movement for the filling and cleaning process. These may be molded parts erroneously stuck on the upper stamp 6. If such occur, the filling process is expediently terminated in good time via the control 17 in order to avoid damage.
  • the brush roller 14 is, as shown, mounted on a linkage 27 which is pressed by a spring 28 in the direction of the upper stamp according to FIG. 1 such that the position of the brush roller 14 automatically adapts to the contours of the stamp surface.
  • a second brush roller 14 'for wetting the surface of the upper die 6 is shown in FIG.
  • a deflector plate 26 for the material removed from the brush roller 14 is mounted between these brush rollers 14, 14 '.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Manufacturing & Machinery (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Presses And Accessory Devices Thereof (AREA)
EP19920115308 1991-09-14 1992-09-08 Compacting press and method for its operation Ceased EP0533021A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2704/91 1991-09-14
CH270491A CH684179A5 (de) 1991-09-14 1991-09-14 Presse zur linearen Verdichtung und Verfahren zu deren Betrieb.

Publications (2)

Publication Number Publication Date
EP0533021A2 true EP0533021A2 (fr) 1993-03-24
EP0533021A3 EP0533021A3 (en) 1993-06-23

Family

ID=4239722

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920115308 Ceased EP0533021A3 (en) 1991-09-14 1992-09-08 Compacting press and method for its operation

Country Status (2)

Country Link
EP (1) EP0533021A3 (fr)
CH (1) CH684179A5 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6277407B1 (en) * 1998-11-10 2001-08-21 Frederick S. Marius Apparatus and method for tablet fabrication
EP1842659A2 (fr) * 2002-04-25 2007-10-10 TMD Friction Services GmbH Presse
US9908154B2 (en) 2014-10-22 2018-03-06 Honda Motor Co., Ltd. Methods and systems for target cleaning die surfaces of a die of a press machine
CN115891270A (zh) * 2022-12-12 2023-04-04 临沭县东升磨料有限公司 一种碳化硅微粉整形装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB134102A (en) * 1918-12-13 1919-10-30 Const S A C D A Schmid Atel Improvements in or relating to Presses for Moulding Powdered Materials.
DE1025772B (de) * 1956-07-21 1958-03-06 Wilhelm Busch Maschinenfabrik Buerstenvorrichtung zum Putzen der Unter- und Oberstempel von keramischen Pressen
DE1182127B (de) * 1961-10-04 1964-11-19 Thuringia Feinkeramikmaschinen Kniehebelplattenpresse
DE3123396A1 (de) * 1981-06-12 1983-01-05 Bucher-Guyer AG Maschinenfabrik, 8166 Niederweningen, Zürich Vorrichtung zum reinigen eines pressstempels in einer presse, insbesondere steinpresse
EP0399281A2 (fr) * 1989-05-24 1990-11-28 Gräbener Pressensysteme GmbH & Co. KG Dispositif de remplissage pour le remplissage automatique de la matrice de presses à poudre

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB134102A (en) * 1918-12-13 1919-10-30 Const S A C D A Schmid Atel Improvements in or relating to Presses for Moulding Powdered Materials.
DE1025772B (de) * 1956-07-21 1958-03-06 Wilhelm Busch Maschinenfabrik Buerstenvorrichtung zum Putzen der Unter- und Oberstempel von keramischen Pressen
DE1182127B (de) * 1961-10-04 1964-11-19 Thuringia Feinkeramikmaschinen Kniehebelplattenpresse
DE3123396A1 (de) * 1981-06-12 1983-01-05 Bucher-Guyer AG Maschinenfabrik, 8166 Niederweningen, Zürich Vorrichtung zum reinigen eines pressstempels in einer presse, insbesondere steinpresse
EP0399281A2 (fr) * 1989-05-24 1990-11-28 Gräbener Pressensysteme GmbH & Co. KG Dispositif de remplissage pour le remplissage automatique de la matrice de presses à poudre

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6277407B1 (en) * 1998-11-10 2001-08-21 Frederick S. Marius Apparatus and method for tablet fabrication
EP1842659A2 (fr) * 2002-04-25 2007-10-10 TMD Friction Services GmbH Presse
EP1842659A3 (fr) * 2002-04-25 2007-10-17 TMD Friction Services GmbH Presse
US9908154B2 (en) 2014-10-22 2018-03-06 Honda Motor Co., Ltd. Methods and systems for target cleaning die surfaces of a die of a press machine
CN115891270A (zh) * 2022-12-12 2023-04-04 临沭县东升磨料有限公司 一种碳化硅微粉整形装置

Also Published As

Publication number Publication date
CH684179A5 (de) 1994-07-29
EP0533021A3 (en) 1993-06-23

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