EP1547741A1 - Cadre de moule pour le pressage de carreaux, comportant un systeme de fixation magnetique des matrices - Google Patents

Cadre de moule pour le pressage de carreaux, comportant un systeme de fixation magnetique des matrices Download PDF

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Publication number
EP1547741A1
EP1547741A1 EP02772429A EP02772429A EP1547741A1 EP 1547741 A1 EP1547741 A1 EP 1547741A1 EP 02772429 A EP02772429 A EP 02772429A EP 02772429 A EP02772429 A EP 02772429A EP 1547741 A1 EP1547741 A1 EP 1547741A1
Authority
EP
European Patent Office
Prior art keywords
blades
securing
frame
magnetic
tiles
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Withdrawn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
EP02772429A
Other languages
German (de)
English (en)
Inventor
Rafael Fernandez Vicente
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.)
Molcer SA
Original Assignee
Molcer SA
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 Molcer SA filed Critical Molcer SA
Publication of EP1547741A1 publication Critical patent/EP1547741A1/fr
Withdrawn legal-status Critical Current

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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
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/0002—Auxiliary parts or elements of the mould
    • B28B7/0014—Fastening means for mould parts, e.g. for attaching mould walls on mould tables; Mould clamps
    • 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
    • B28B7/0002—Auxiliary parts or elements of the mould
    • B28B7/0014—Fastening means for mould parts, e.g. for attaching mould walls on mould tables; Mould clamps
    • B28B7/002—Fastening means for mould parts, e.g. for attaching mould walls on mould tables; Mould clamps using magnets
    • 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
    • B28B7/0064—Moulds characterised by special surfaces for producing a desired surface of a moulded article, e.g. profiled or polished moulding surfaces
    • 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
    • B28B7/36—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article
    • B28B7/366—Replaceable lining plates for press mould

Definitions

  • the present invention refers to a mould frame for pressing tiles with magnetic securing of blades intended to allow quick interchange of blades with a high level of safety.
  • This invention is characterised in the use of electro-permanent magnets or of electromagnets in the securing of the blades incorporating appropriate means for suppressing the magnetic field for the withdrawal and replacement of the blades.
  • This invention has a position of the magnets adapted to the position of the blade and the loads it receives, be this position horizontal or vertical.
  • the production of tiles makes use of punches with high application pressures intended to compress the ceramic or clay material between two surfaces, one surface being visible and the other intended to be attached to the surface to be covered.
  • the upper punch descends until reaching the lower punch on which the clay or ceramic material is deposited.
  • the upper face, to which the upper punch is applied is the hidden face of the tile, and the lower face in contact with the lower punch gives the form to the visible face of the tile.
  • the material is determined by the presence of some blades secured to a frame.
  • the form of the blades is that which the edge of the tile will adopt.
  • These blades usually have a shoulder which results in a raised area in the tile so that in their production and during transport over the conveyor belt, through mutual contact, they are not blunted.
  • the surface is inclined favouring the ejection of the tile. This inclination is known in the trade as "tirada”.
  • the blades must also be changed when it is necessary to change the production to make use of different peripheral configurations.
  • the present invention makes use of a magnetic means of securing which greatly reduces the time for replacement of blades since release from the magnetic field and the restoration thereof are immediate.
  • the present invention in relation with a mould frame for pressing tiles with magnetic securing of blades, overcomes the substantial times for replacement of the blades which occur with the frames known until now.
  • the frame is provided with magnetic means for securing the blades.
  • the frames based on screwed means for securing simply include a seating surface on which are to be found the threaded perforations which accept the screws.
  • This invention includes seats for the blades, the means of securing magnetically, and also the devices which allow control of the magnetic flux to permit the blades to be removed and new or recovered ones mounted.
  • the magnetic securing is achieved through the application of a magnetic field which attracts the blades.
  • This magnetic field can be obtained either by means of an electro-permanent magnet or otherwise by means of an electromagnet.
  • electro-permanent magnets which channel the magnetic flux appropriately, allows two possible states: the activated electro-permanent magnet forcing the magnetic field generated by the magnetisable material to reach the blade, or the magnet inhibited wherein the magnetic field of the magnetisable material is deviated before reaching the blade without exercising any securing action whatsoever.
  • An alternative means of securing makes use of an electromagnet.
  • the excitation in the coil which generates the magnetic field has to be maintained constantly during the whole time that the blades are attached to the frame.
  • the blades can be located in two positions with respect to the frame, either horizontal establishing support on an upper horizontal face, or vertical covering the side of the internal window of the frame.
  • the blade can be one only, or be made up of different elementary blades which progressively cover each of the faces.
  • the means of magnetic coupling are always behind the surface supporting the blades against the frame in housings intended for this purpose.
  • a magnetic core is located between ferrite or neodyne elements with their common poles (for example the N poles) directed toward the core.
  • This assembly for magnetic coupling is housed in a recess in the frame, being separated from its bottom by means of a tablet of magnetisable material for example alnico.
  • This tablet is surrounded by an excitation coil which magnetises the alnico tablet in one direction or the other.
  • the flux generated by this tablet extends to the exterior of the recess reaching the blades since it encounters opposition with the flux of the ferrite elements.
  • the flux finds continuity with that generated by the ferrite elements whereby the magnetic circuit established does not reach the blades.
  • the magnetic means of coupling make use of an electromagnet
  • the latter is formed by a coil housed in a recess in the form of a channel having a closed directrix.
  • the recess establishes a closed circuit wherein is lodged the coil which generates the magnetic field in the event of a current flowing establishing in turn a magnetic field which flows through the core which is defined on the inside of the circuit.
  • Figure 1 shows a first embodiment of the invention which makes use of vertical blades and electromagnets.
  • Figure 2 shows a second embodiment of the invention which makes use of horizontal blades and electromagnets.
  • Figure 3 shows a first embodiment of the invention which makes use of vertical blades and electro-permanent magnets.
  • Figure 4 shows a second embodiment of the invention which makes use of horizontal blades and electro-permanent magnets.
  • Figure 5 shows a schematic of the two modes of operation of the permanent magnet according to the polarisation of the lower tablet.
  • Figure 6 shows a detail of the support of the lower blades in which instead of making use of a second strip, use is made of a flange on the frame when the blades are vertical.
  • the present invention consists of a mould frame for pressing tiles with magnetic securing of blades in which by means of the combined disposition of recesses for housing magnetic field generating assemblies, the securing of the blades is achieved.
  • the first embodiment is shown in figure 1 wherein the plan and elevation are shown of the frame (1) together with a detail view of the cross section with the means of securing the blade (3).
  • the blade (3) assures its position by means of some securing strips (4, 5) which control the exact position of the blades (3) with respect to the frame (1).
  • Figure 6 shows a detail of this embodiment and another from the rear in which the possibility is also presented of doing without the lower strip (5) since it is the frame itself which includes a flange of the frame.
  • the securing action is achieved with an electromagnet configured by means of a coil (2) which is housed in a recess (1.3) in channel form from which emerges an inner projection (1.2) through which the magnetic field generated by the coil (2) is channelled.
  • the excitation of the coil (2) is what establishes the control over the force securing the blades (3) so, when this is not present, the interchange is possible.
  • the blades (3) can be divided into several pieces which cover the entirety of the interior perimeter of the window (1.4) or it can be a single piece covering it totally.
  • the frame (1) includes some perforations (1.1) by which its securing to the tile shaping mould is assured.
  • FIG. 2 This second embodiment is represented in figure 2 wherein the frame (1) likewise has two windows (1.4) only this time the blades (3) are located on the frame (1), on a shoulder (1.5) around the perimeter of each of the windows (1.4).
  • the means of coupling are the same, but by facing the blade (3), the projection (1.2) which is inside the recess (1.3) in which the coil (2) is housed, is now directed upwards.
  • the blades (3) are positioned vertically, between the registering strips (4, 5), relegating the magnetic securing means to a single recess (1.6).
  • the lower strip (5) can be replaced by a flange of the frame (1) such as is shown in the second detail of Figure 6.
  • a tablet (8) which serves to control the magnetic flux of the electro-permanent magnet allowing control of the securing force to permit interchange of the blades (3).
  • the tablet (8) is made of a magnetisable material, the material employed in this embodiment being preferably alnico, and it is surrounded by a coil (10).
  • the coil (10) acts during a short period of time depending on the size and nature of the material of the tablet (8) and it can be of the order of one second. In this time, the magnetic field that the coil (10) applies to the tablet (8) remagnetises it in the direction of interest.
  • the ferrites (7) have the N poles directed toward the core (6) permanently.
  • the release of the blades is achieved by exciting the coil (10) again with a pulse which magnetises the tablet (8) with the position of its poles reversed, that is, with the S pole toward the core (6).
  • the magnetic flux created by the tablet (8), such as is shown in Figure (6) is conducted by the ferrites (7) since a magnetic circuit is established with the frame (1).
  • This magnetic circuit is closed before reaching the blades (3) whereby the latter are not reached by the magnetic field and they are free for replacement.
  • the internal configuration of the blades (3) proves identical to the first embodiment, wherein it is now only necessary to act on the means of magnetisation and demagnetisation when changing the blades (3), since the presence of the electro-permanent magnet (6) together with the ferrite pieces (7) assure a constant magnetic flux which guarantees the securing action without external excitation.
  • the blade (3) is once again located in a recess (1.5) which performs the function of assuring its position.
  • the securing screw (9) is arranged vertically fixing the core of the permanent magnet (6) and the ferrite pieces (7); and both elements rest against the magnetisation and demagnetisation tablet (8) which occupies the space left in the bottom of the recess (1.6) of the frame (1).
  • the second and fourth embodiments use several sets of electro-permanent magnets (6) with their ferrite pieces (7) even covering the length of the blade (3).

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Toys (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
EP02772429A 2002-10-02 2002-10-02 Cadre de moule pour le pressage de carreaux, comportant un systeme de fixation magnetique des matrices Withdrawn EP1547741A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ES2002/000462 WO2004030881A1 (fr) 2002-10-02 2002-10-02 Cadre de moule pour le pressage de carreaux, comportant un systeme de fixation magnetique des matrices

Publications (1)

Publication Number Publication Date
EP1547741A1 true EP1547741A1 (fr) 2005-06-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP02772429A Withdrawn EP1547741A1 (fr) 2002-10-02 2002-10-02 Cadre de moule pour le pressage de carreaux, comportant un systeme de fixation magnetique des matrices

Country Status (3)

Country Link
EP (1) EP1547741A1 (fr)
AU (1) AU2002337202A1 (fr)
WO (1) WO2004030881A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1752282A1 (fr) * 2005-08-10 2007-02-14 Sapp S.p.A. Moule et système d'ancrage sur le plateau d'une presse
EP2113353A3 (fr) * 2008-04-29 2011-06-22 Elematic Group Oy Construction de la paroi latérale d'un moule de coulée

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9303683U1 (de) * 1992-07-01 1993-06-03 Echeverria Lizarazu, Alberto, San Sebastian Bleche zur Herstellung von Formkästen für Schleifmittel

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1344377A (fr) * 1962-10-15 1963-11-29 Coignet Construct Edmond Dispositif de moulage pour toutes matières, béton, béton armé, produits plastiques, céramiques et autres
GB1301272A (fr) * 1968-11-26 1972-12-29
GB1319082A (en) * 1970-06-08 1973-05-31 Nat Res Dev Concrete pressing processes and apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9303683U1 (de) * 1992-07-01 1993-06-03 Echeverria Lizarazu, Alberto, San Sebastian Bleche zur Herstellung von Formkästen für Schleifmittel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1752282A1 (fr) * 2005-08-10 2007-02-14 Sapp S.p.A. Moule et système d'ancrage sur le plateau d'une presse
EP2113353A3 (fr) * 2008-04-29 2011-06-22 Elematic Group Oy Construction de la paroi latérale d'un moule de coulée
US8104737B2 (en) 2008-04-29 2012-01-31 Elematic Group Oy Sidewall construction of a casting mold

Also Published As

Publication number Publication date
AU2002337202A1 (en) 2004-04-23
WO2004030881A1 (fr) 2004-04-15

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