WO2007115552A1 - Procédé et dispositif de pressage pour former une pièce moulée par compression - Google Patents

Procédé et dispositif de pressage pour former une pièce moulée par compression Download PDF

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Publication number
WO2007115552A1
WO2007115552A1 PCT/DE2007/000613 DE2007000613W WO2007115552A1 WO 2007115552 A1 WO2007115552 A1 WO 2007115552A1 DE 2007000613 W DE2007000613 W DE 2007000613W WO 2007115552 A1 WO2007115552 A1 WO 2007115552A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressing
press
die
pressing part
pressed
Prior art date
Application number
PCT/DE2007/000613
Other languages
German (de)
English (en)
Inventor
Walter Wolfrom
Karl Zippel
Original Assignee
Dorst Technologies Gmbh & 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 & Co. Kg filed Critical Dorst Technologies Gmbh & Co. Kg
Publication of WO2007115552A1 publication Critical patent/WO2007115552A1/fr

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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
    • B30B11/027—Particular press methods or systems
    • 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

Definitions

  • the invention relates to a pressing method for pressing a pressed part with the generic features according to claim 1, 3 or by a press device with the Oberbegriffliehen features according to claim 12.
  • Pressing devices for pressing a pressed part of powdered or granular material to be pressed are generally known, wherein the material consists in particular of ceramic and / or metallic substances.
  • a press device usually has one
  • the die has a die opening into which the material to be pressed is filled. Subsequently, the material is pressed in the die opening between the end faces of the ram.
  • the structure of the pressing part is due to the shape of the Matrizenö Maschinenschenswandung and the end faces of the ram.
  • a magnetizable material is filled into the die opening according to a known procedure, wherein a magnetic field and / or heat act on the material during the pressing.
  • the die is not individually heated for each pressing process but continuously maintained at a required operating temperature.
  • the disadvantage here is that powdery or granular material can remain stuck when filling in a heated die opening at upper side portions of the Matrizenö Maschinenswandung and thereby an uneven distribution of the material in the die opening is the result.
  • the heated die causes the powder to clump together during filling and no homogeneous filling. To eliminate this disadvantage will be in this
  • Procedure Permanent magnets made in two steps.
  • the material to be pressed is pre-pressed in a press arrangement to a pre-pressed part and then converted into a second press arrangement with the heated die.
  • the second step the material to be pressed is pre-pressed in a press arrangement to a pre-pressed part and then converted into a second press arrangement with the heated die.
  • Vorpressteil is then pressed under the action of heat and under the action of an aligning magnetic field to the desired pressing part.
  • the object of the invention is to simplify a pressing method for pressing a pressing part or a pressing device.
  • permanent magnets and / or pressed parts made of several layers and / or materials should be easier to manufacture.
  • a pressing method for pressing a pressing part in which a pre-pressing is pre-pressed in a first press assembly and in which the pressing member is pressed from the pre-pressing in a second press assembly, wherein the pre-pressing is transported from the first press assembly to the second press assembly after the pre-pressing , wherein for transporting the Vorpressteils a transporting device is used with a receiving opening for the pre-pressing.
  • a pressing method for pressing a pressed part is pre-pressed in a press arrangement, the pre-pressing part is removed from the press arrangement after pre-pressing and the pre-pressing part is pressed into the final density at a later time, the pre-pressing part taken after the pre-pressing of the press assembly and stored in a transporting device with a receiving opening for the pre-pressing and the pre-pressing for pressing in the final density to the later time in the press arrangement is used again.
  • prepressing and final compression in two cycles is possible, so that, for example, pre-pressed parts are pre-pressed in a cold die and later pressed into the then heated die, without the die having to be cooled and reheated for each pressing part.
  • Transporting device uses a die of the first and / or the second press arrangement with a die opening for prepressing the Vorpressteils as the receiving opening.
  • a separate transporting means for example in the form of a cylinder with a transporting device opening, is used as the receiving opening.
  • the pre-pressing part is preferably offset from a die opening of the die of the first press arrangement after the pre-pressing in particular by means of at least one upper or lower press ram of the first press arrangement in the receiving opening of the transport device.
  • the pre-pressing part After being transported out of the receiving opening of the transport device, the pre-pressing part is preferably pressed into a die opening of a die of the in particular second press arrangement.
  • the transport device is preferably transported with a standalone displacement device. According to a particularly preferred procedure, at least two pre-pressed parts are pre-pressed and transported for pressing to the then integral pressing part in the second press arrangement.
  • the pre-pressing is carried out in the first press arrangement or possibly also different such first press arrangements.
  • a magnetic field is applied in the region of the in particular second press arrangement for magnetizing the pressing part in order to produce a permanent magnet.
  • the pre-pressing part is used to produce e.g. a permanent magnet in the preheated die of the particular second press assembly for pressing the pressed part transported in a heated state.
  • a pressing device for pressing a pressing part with a first press arrangement for prepressing a pre-pressing part and a second press arrangement for pressing the pressing part from the
  • Prepressing part wherein the pre-pressing is transported after the pre-pressing of the first press assembly to the second press assembly, wherein the press apparatus comprises a transporting device having a receiving opening for receiving and transporting the Vorpressteils.
  • the transport device is formed according to the first embodiment by a die of the first and / or the second press arrangement with a die opening for prepressing the Vorpressteils as the receiving opening.
  • the transporting device is according to the second embodiment by a transport device with a transport device opening as the receiving opening educated.
  • a cross section of the receiving opening of the transport device transversely to the pressing direction is advantageously dimensioned equal to or larger than an opening diameter of a die opening of the die of the first press arrangement as the receiving opening, so that the pre-pressing is displaceable from the die opening into the receiving opening.
  • the receiving opening of the transport device preferably has an opening diameter equal to or smaller than an expansion outside diameter of the pre-pressing part such that the pre-pressing part is frictionally held by a receiving opening wall of the receiving opening under lateral tension.
  • the press device is preferably designed with an independent displacement device for transporting the transport device.
  • a control device is advantageous for pre-pressing a plurality of pre-press parts in the first press arrangement and for pressing at least two pre-press parts transported into the second press arrangement to the press part.
  • Magnetizing the pressed part during pressing is a
  • a heating device is advantageous for heating the second press arrangement for
  • a pre-pressing part can be produced in a manner known per se and pressed by means of a specially designed transporting device into a second press arrangement for final pressing using heat and a magnetic field.
  • the peculiarity of the transport device is that the transport device has a receiving opening for the pre-pressing part in such a way that the pre-pressing part is not only selectively grasped or sucked in but grasped.
  • a second method is improved, in particular multi-layer pressed to press parts of different materials pressing parts and / or columnar pressing in the pressing direction of different materials pressed parts can be produced in a simple manner.
  • the die of the first press arrangement as a transport device, wherein only the press dies are pulled out of the die opening and the die is then transported with a displacement device in the second press arrangement.
  • the pre-pressing part remains firmly in the die opening, against the
  • an independent transport device can be used as a transporting device, which is after the pre-pressing, that is placed in particular above or below one of the die openings, whereupon of the the press part is pushed into the independent transport device or in the receiving opening thereof by means of at least one upper or lower press ram.
  • Such an independent transport device also allows an advantageous intermediate storage of Vorpress turnover or transporting to more distant second press arrangements in a stand-alone press.
  • intermediate storage a large number of pre-pressed parts can advantageously be pre-compressed in a press and reused in a subsequent press cycle in the same press. In such a case, the press will form both the first and second press assemblies.
  • Figures 2A-2H show such a press device at different times of an alternative press cycle
  • FIG. 3A-3D show an alternative embodiment of a press apparatus with a separate transport device for transporting a pre-press part between the press arrangements; and Fig. 4 cross-sections of pressed parts of various
  • Embodiment which can be produced alternatively with a press cycle according to FIG. 2.
  • FIGS. 1A-1I show a press apparatus with two press arrangements 1, 2 for pressing a pressed part 3 of a compressible powdery and / or granular material, which meshes during pressing, so that a solid pressing part 3 is produced.
  • a magnetizable material is used for the production of permanent magnets.
  • other types of materials in particular ceramic and / or metallic materials, but also e.g. poorly flowable substances or combustible powder for producing such pressed parts 3 can be used.
  • IA-4 only components are shown which are necessary for understanding the process cycle and a structure of an exemplary press apparatus. Other components that are required for such pressing methods and press devices are designed in a conventional manner.
  • the first press arrangement 1 consists in particular of a die 10 with a die opening 11 for receiving the powdery and / or granular material. So that the material does not fall downwards out of the die opening 11 during filling by means of a filling shoe 17, one or more press punches 14, 16 are inserted from below into the die opening 11 and seal them off.
  • the actual pressing ram 14 has a central passage opening 15, in which the further pressing ram 16 designed as a core pin is mounted adjustably in the pressing direction x.
  • the further punch 16 is used to form a through hole in the pressing part 3 and is pushed during filling up to the top of the die 10 through the die opening 11.
  • the die opening 11 during filling thus consists of a cylindrical space for receiving the material to be pressed.
  • an upper punch 12 is arranged, which also has a through hole 13 for receiving the further formed as a core pin ram 16.
  • more or less such press punches may be used. Also, that must be
  • the second press arrangement 2 is sketched in FIG. 1A, which is likewise formed from a die 20 with a die opening 21, on the underside a press die 24 with a passage opening 25 and a further press die 26 designed as a core pin. Spaced above the die 20 is an upper punch 22 is also arranged with a through hole 23 for receiving or carrying the other punch 26 during the pressing process.
  • the die 20 of the second press arrangement 2 can be heated to a temperature T by means of a heating device and also surrounded by a magnetizing device 27 for generating a magnetic field H during the pressing (FIG. 1 IE-IF).
  • the dimensioning of the die opening 11 of the die 10 of the first press arrangement 1 is based on the dimensioning of the die opening 21 of the die 20 of the second Press assembly 2 tuned, so that a pre-pressed in the press assembly Vorpressteil 31 in the die opening 21 of the die 20 of the second press assembly is used and ready to compress. Accordingly, in the case of an exemplary circular
  • An inner diameter d 1 of the die opening 11 of the die 10 of the first press arrangement is smaller or preferably equal to an inner diameter d 2 of the die opening 21 of the die 20 of the second press arrangement 2.
  • the die 10 of the first press arrangement 1 is offset via the die 20 of the second press arrangement 2, as sketched in FIG. Due to the pre-pressing, the pre-pressing part 31 is clamped against the die opening wall of the first die 10 in such a way that it can not slip out of the die opening 11 during transport.
  • the pressing punches 24, 26, 22 of the second press arrangement (2) move into an operating position within the die opening 21 of the die 20 of the second press arrangement 2.
  • the upper press die 22 the second press arrangement 2 passes through the die opening 11 of the die 10 of the first press arrangement 1, wherein the end face of the press die 22 pushes the pre-pressing section 31 out of the female die 10 of the first press arrangement 1, which is cold in the case of permanent magnet manufacturing, into the die opening 21 to the operating temperature T heated die 20 of the second press assembly 2 pushes.
  • T heated die 20 of the second press assembly 2 pushes.
  • a subsequent sixth point in time t 5 which is sketched in FIG. IF, the pre-pressing part in the die 21 of the second press arrangement 2 is pressed to the pressing part 3 with a pressing force F2.
  • the die 10 of the first press arrangement 1 is set back into the first press arrangement 1 by means of the displacement device 5.
  • the pressing member 3 is ejected upward from the die 20 of the second press assembly 2 and removed from the press assembly by means of the lower punch 24 of the second press assembly.
  • the displacement device 5 is preferably equipped with a pneumatic, hydraulic or electric motor drive and controlled by a control device such that it can grasp and displace the die 10 of the first press arrangement 1 accordingly.
  • the control device of the press device is designed in such a way that the individual process sequences can be coordinated with one another.
  • Figs. 2A-2H show an alternative pressing cycle in which a pressing member 3 * made of different materials is pressed. In the illustrated, amongsforr ⁇ the pressing member 3 * should be formed of two superposed different types of material layers.
  • the die opening 11 of the die 10 of the first press arrangement 1 is filled with a first material A to be pressed.
  • the die 10 After a prepressing of the first material with a pre-pressing force F1 to a first pre-pressing part 31, as sketched in FIG. 2B, the die 10 is uncovered and set in the second press arrangement 2, as sketched in FIG. 2C.
  • the first Vorpressteil 31 of the first material A is by means of the upper punch 22 of the second
  • the second material B in the first press arrangement 1 is pre-pressed to form a second pre-press part 33 by means of a pre-pressing force Fl, which may possibly deviate from the pre-pressing force for the first pre-press part.
  • Fl pre-pressing force
  • Press assembly 1 pushed out into the die opening 21 of the die 20 of the second press arrangement on the first pre-pressing part 31 already located therein.
  • FIGS. 3D sketched An alternative arrangement, in which, instead of the die 10 of the first press arrangement 1, an independent transport device 4 is used for transporting the pre-pressing part 31, reference is made to FIGS. 3D sketched.
  • the transporting device 4 is set via the die opening 11 of the die 10 of the first press arrangement 1 such that a transporting device opening 40 is arranged as a receiving device in alignment above the die opening 11 of the die 10 of the first press arrangement 1.
  • the pre-pressing part 31 by means of the upper ram 22 of the second
  • a pressing force of the pressing rams 22, 24 of the second press arrangement is constructed such that the pre-pressing part 31 in the die 20 of the second press arrangement 2 is pressed to the pressing part 3.
  • the second press arrangement 2 may again have a die 20 which can be heated to a temperature T and a magnetizing device 27 in order to be able to produce permanent magnets as the pressed parts 3.
  • Vorpressteil 31 is pushed by means of the upper ram 22 first in the die opening 21 of the die 20 of the second press assembly 2, then the upper ram 22 completely pulled out again to remove the transport means 4 by means of the displacement device 5 and subsequently the upper Press punch 22 under the action of the second pressing force F2 lower again into the die opening 21 of the die 20 of the press assembly 2, as is sketched with reference to FIG. 3A on the right side.
  • the Vorpressteil 31 is pushed by means of the upper ram 22 first in the die opening 21 of the die 20 of the second press assembly 2, then the upper ram 22 completely pulled out again to remove the transport means 4 by means of the displacement device 5 and subsequently the upper Press punch 22 under the action of the second pressing force F2 lower again into the die opening 21 of the die 20 of the press assembly 2, as is sketched with reference to FIG. 3A on the right side.
  • Transport device 4 may be used instead of using two or more separate press assemblies 1, 2, a single press assembly in the press apparatus.
  • a separate such transport device 4 By pre-pressing a plurality of Vorpress former 31 and their intermediate storage in each case a separate such transport device 4, many such Vorpressmaschine 31 can during a first cycle 31st to get prepared.
  • the die 20 is then heated to the operating temperature T and the magnetic field H is applied to press the pressed parts 3 one after the other, with the plurality of conveyors 4 being placed in and over the die one by one.
  • a conversion is also possible in the case of using a die 10 of the first press arrangement, in which case a multiplicity of such dies 10 must be provided in order to be able to temporarily store the corresponding multiplicity of pre-pressed parts 31.
  • an intermediate storage and transport of Vorpress former 31 from the first press arrangement to a spatially distant second press arrangement is easily possible.
  • Fig. 4 shows exemplary pressing parts in sectional view
  • these pressing parts are not constructed as shown in Figs. 2A - 2G of different materials in a layering in the pressing direction, but from a variety of different materials which extend in the pressing direction adjacent to each other through the pressing member.
  • the first pressing part shown in FIG. 4 on the left has a first cylindrical body 51 made of a first material and two columnar material areas 52, 53 guided in the pressing direction through this first body with one or two different materials.
  • the middle pressing part shown in Fig. 4 for example, has only one column 54, which leads through the body 51 of the remaining pressed part.
  • the first layer can be pre-pressed by filling powder in the second press assembly and there pre-pressing, whereupon further layers are placed and pressed by placing transported vorpress turnover.
  • This is advantageous because, by placing pre-pressed parts instead of filling further powder, powder mixtures in the boundary region between the layers are avoided. In principle, too
  • Intermediate layers or upper layers are formed by filling and pressing powder onto a pre-pressing part used in the second press arrangement.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

L'invention concerne un dispositif de pressage et un procédé de pressage d'une pièce moulée par compression. Un élément préformé (31) est préformé dans un premier système de pressage (1) et la pièce moulée par compression (3) est formée à partir de la pièce prémoulée par compression (31) dans un premier dispositif de pressage (1). Au terme du préformage, la pièce moulée par précompression (31) est retirée du premier dispositif de pressage (1) et transportée jusqu'au deuxième dispositif de pressage (2). Pour le transport de la pièce prémoulée par compression (31), on utilise un dispositif de transport doté d'un orifice de réception (11) destiné à la pièce moulée par précompression (31).
PCT/DE2007/000613 2006-04-04 2007-04-04 Procédé et dispositif de pressage pour former une pièce moulée par compression WO2007115552A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006015766.4 2006-04-04
DE200610015766 DE102006015766A1 (de) 2006-04-04 2006-04-04 Pressverfahren und Pressenvorrichtung zum Pressen eines Pressteils

Publications (1)

Publication Number Publication Date
WO2007115552A1 true WO2007115552A1 (fr) 2007-10-18

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Application Number Title Priority Date Filing Date
PCT/DE2007/000613 WO2007115552A1 (fr) 2006-04-04 2007-04-04 Procédé et dispositif de pressage pour former une pièce moulée par compression

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DE (1) DE102006015766A1 (fr)
WO (1) WO2007115552A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT507913B1 (de) * 2009-03-02 2013-08-15 Miba Sinter Austria Gmbh Vorrichtung zum verdichten eines sinterbauteils

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1183354A (en) * 1966-03-12 1970-03-04 Rheinische Kalksteinwerke Process and Apparatus for Pressing Moulding Materials
US4900240A (en) * 1987-12-15 1990-02-13 Ing. Johann Leinweber Anstalt Fur Mechanik Apparatus for pressing curved brake linings, especially for drum-type brakes
EP0432598A2 (fr) * 1989-12-13 1991-06-19 Anton Heggenstaller AG Procédé et dispositif pour le moulage par compression d'articles formés en particules végétales
FR2661343A1 (fr) * 1990-04-27 1991-10-31 Le Molaire Roger Procede et machine pour la fabrication d'un produit fritte avec reglage des parametres en continu.
US6365094B1 (en) * 2000-01-31 2002-04-02 Stackpole Limited Lubricated die

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19746003A1 (de) * 1997-10-20 1999-04-22 Bernhard Dreher Verfahren zum Herstellen eines Gegenstandes
DE10200775C1 (de) * 2002-01-10 2003-08-14 Karl Bausch Gmbh & Co Kg Dr Verfahren zum Fertigen von aus Blechlamellen bestehenden Paketen für Magnetkerne

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1183354A (en) * 1966-03-12 1970-03-04 Rheinische Kalksteinwerke Process and Apparatus for Pressing Moulding Materials
US4900240A (en) * 1987-12-15 1990-02-13 Ing. Johann Leinweber Anstalt Fur Mechanik Apparatus for pressing curved brake linings, especially for drum-type brakes
EP0432598A2 (fr) * 1989-12-13 1991-06-19 Anton Heggenstaller AG Procédé et dispositif pour le moulage par compression d'articles formés en particules végétales
FR2661343A1 (fr) * 1990-04-27 1991-10-31 Le Molaire Roger Procede et machine pour la fabrication d'un produit fritte avec reglage des parametres en continu.
US6365094B1 (en) * 2000-01-31 2002-04-02 Stackpole Limited Lubricated die

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT507913B1 (de) * 2009-03-02 2013-08-15 Miba Sinter Austria Gmbh Vorrichtung zum verdichten eines sinterbauteils

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