EP1226927A2 - Lineare Presse zum Verdichten von Pulvern - Google Patents

Lineare Presse zum Verdichten von Pulvern Download PDF

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Publication number
EP1226927A2
EP1226927A2 EP02001226A EP02001226A EP1226927A2 EP 1226927 A2 EP1226927 A2 EP 1226927A2 EP 02001226 A EP02001226 A EP 02001226A EP 02001226 A EP02001226 A EP 02001226A EP 1226927 A2 EP1226927 A2 EP 1226927A2
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EP
European Patent Office
Prior art keywords
machine
belts
conveyor device
counteracting
powder
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Withdrawn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
EP02001226A
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English (en)
French (fr)
Other versions
EP1226927A3 (de
Inventor
Mauro Comastri
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.)
Evoluzioni di Mauro Comastri
Original Assignee
Evoluzioni di Mauro Comastri
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 Evoluzioni di Mauro Comastri filed Critical Evoluzioni di Mauro Comastri
Publication of EP1226927A2 publication Critical patent/EP1226927A2/de
Publication of EP1226927A3 publication Critical patent/EP1226927A3/de
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B5/00—Presses characterised by the use of pressing means other than those mentioned in the preceding groups
    • B30B5/04—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band
    • B30B5/06—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band co-operating with another endless band
    • 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
    • B28B5/00—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in or on conveyors irrespective of the manner of shaping
    • B28B5/02—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in or on conveyors irrespective of the manner of shaping on conveyors of the endless-belt or chain type
    • B28B5/026—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in or on conveyors irrespective of the manner of shaping on conveyors of the endless-belt or chain type the shaped articles being of indefinite length
    • B28B5/027—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in or on conveyors irrespective of the manner of shaping on conveyors of the endless-belt or chain type the shaped articles being of indefinite length the moulding surfaces being of the indefinite length type, e.g. belts, and being continuously fed

Definitions

  • the present invention relates to a machine for compacting powders, powder mixtures or other semi-agglomerated or agglomerated materials of various kinds which, at determined pressures, possibly in combination with specifically created environmental situations, have permanent or temporary aggregating power, and are used to form various laminar structures, for example crude ceramic tiles.
  • the aforesaid materials to be compacted will be all known hereinafter for simplicity as "powders", it being understood that this term also includes all the other aforelisted materials.
  • the traditional presses for compacting powders all comprise: a containing box or cavity defining the plan shape of the tile to be obtained; a loading device for filling the cavity; two or more opposing pressing members, known as dies, divided into upper and lower (with respect to the cavity) and movable in the two vertical directions to entrap and compress the powders inserted into the cavity.
  • the product obtained by compacting the powders is released by moving the dies into a position which enables the crude tile formed in this manner to be extracted and then removed by moving the loading carriage, which performs this function in addition to again loading the cavity. In the meantime the dies return to their starting (loading) position, ready for a new cycle.
  • a new machine for pressing crude ceramic tiles has recently appeared on the market, comprising essentially not only a press provided with two opposing flat dies mutually movable in a vertical direction, but also two belt conveyor devices, one lower and the other upper.
  • a branch of each of the two belts lies in front of the face of one of the two dies, the branches concerned (the facing branches) of the two belts being parallel to each other.
  • the two belt conveyor devices are operable in synchronism, the said branches moving in the same direction and at the same speed.
  • the lower conveyor device extends further upstream than the upper conveyor device to enable a hopper, into which the powder is loaded, to cause a uniform layer of powder of the required thickness to fall onto it. This thickness is in any event less than the distance between the two said branches.
  • lateral retention means consisting essentially of a series of elastic ridges projecting from the belt surface to basically define the plan shape of the tile.
  • the two conveyor devices are again operated to bring the next portion of yet to be pressed powder to the dies, the already pressed first portion, in the form of a crude tile, consequently moving downstream onto the lower belt, where a suitable conveyor device is provided to receive it.
  • An object of the invention is to provide a powder compacting machine which uses considerably less energy than traditional presses and also than the aforedescribed pressing machine.
  • Another object of the invention is to provide a powder compacting machine which is considerably more simple (and consequently less costly) and less bulky than the aforedescribed pressing machine, while being able to produce tiles of at least the dimensions of those producible with this latter, and with at least the same (if not better) quality characteristics.
  • the powder compacting machine of the present invention comprising: a lower belt conveyor device and an upper belt conveyor device, the operation of which is synchronized such that the facing and distant branches of the relative belts move in the same direction and with the same horizontal velocity component, the lower conveyor device having a greater upstream extension than that of the upper conveyor device; means for depositing in the vicinity of the upstream end of the lower conveyor device a uniform layer of powder of the required thickness; and lateral retention means; characterised in that:
  • presses are therefore not provided, this being a considerable advantage compared with the known pressing machine.
  • the pressing action is provided by the convergence of the facing branches of the belts of the two conveyor devices (of which the belts and rollers, and the relative supports, must be suitably dimensioned as stated).
  • the machine of the invention is therefore considerably more simple and decidedly less bulky and less costly than traditional presses and also than the known pressing machine (precisely because of the elimination of the press).
  • counteracting means are conveniently provided disposed on the inside of each of the two belt conveyor devices, between one roller and the other, at least along the most downstream portion of each of the two facing branches of the relative belts. This avoids having to provide excessively robust belts (with the problems that this involves) and/or powder accumulators, due to excessive belt deformation which can occur particularly before the more downstream roller of the two belt conveyor devices.
  • the said counteracting means preferably comprise two substantially rigid plates positioned in contact with the relative belt branch and presenting uniformly distributed through perforations which communicate with a source of compressed air, to create between the counteracting plate and the belt a very thin air cushion which facilitates the sliding of the belt and prevents its wear by rubbing.
  • the surface of the counteracting plates is formed of an anti-wear material.
  • the counteracting means can also be of another type, for example ball or roller slide tables, or simple plates coated with an anti-wear material.
  • the lateral retention means can consist of two bands mounted taut about relative pulleys, one for each side, one branch of each band lying in the vertical plane and grazing the relative edges of the belts of the upper and lower conveyor devices, the operation of the two lateral retention bands being synchronized with the operation of the belts.
  • the powder compacting machine 10 comprises a lower belt conveyor device, indicated overall by 12, and an upper belt conveyor device, indicated overall by 14.
  • the lower conveyor device 12 comprises a flexible belt 16 mounted taut about two rotatable rollers 18 and 20, of which the downstream (or terminal) roller is motorized.
  • the upper conveyor device 14 also comprises a flexible belt 22 mounted taut about two rotatable rollers 24 and 26, the downstream roller of which is motorized. The operation of the two conveyor devices 12 and 14 is synchronized such that the facing branches (the upper branch 28 of the lower belt 16 and the lower branch 30 of the upper belt 22) move in the same direction with the same horizontal velocity component.
  • the machine 10 also comprises a hopper 32 loadable with powder (for example powder for forming ceramic tiles).
  • the lower aperture of the hopper 32 has a width substantially equal to that of the belt 16 and is provided with an adjustment device which, when the conveyor devices 12 and 14 are operated, enables a uniform layer of powder of the required thickness to be formed on the upper branch 28 of the belt 16.
  • This adjustment device comprises a shutter 34 movable vertically in the two directions. For obvious reasons (see Figure 2), the thickness of the powder layer must be less than or at most equal to the maximum distance (upstream) between the lower branch 30 of the upper belt 22 and the upper branch 28 of the lower belt 16.
  • relative counteracting means indicated by 38 and 40 are provided. These latter consist in this specific case of relative rigid plates which make contact with the relative branch (28, 30), or at least the most downstream portion of this branch (as in Figure 2), and present uniformly distributed through perforations (shown for simplicity only in the variant of Figure 4 and indicated by 41), which communicate (in a manner not represented in Figure 4, for simplicity) with a compressed air source (also not shown), in order to create between the counteracting plate 38, 40 and the relative belt portion a very thin air cushion which facilitates the sliding of the belt and prevents its wear by rubbing.
  • the counteracting plates are coated with an antifriction material, for example the sintered material known by the name of FRIMET and produced by BSA of Milan.
  • the machine 10 is completed by lateral retention means consisting in this specific case of two bands 42 and 44, one per side, mounted about relative pulleys 50, 52, 54, 56, one of which may be motorized.
  • the more inner branch, 46 and 48 respectively, of each band grazes the relative edges of the belts 16 and 22, to hence prevent lateral escape of the powder and at the same time define the width of the compacted powder laminar structure produced by the machine 10.
  • the movement of the lateral bands 42, 44 is synchronized with that of the belts 16 and 22 (if both the pulleys of each band are idle, the synchronization takes place by dragging) so that there is no relative movement between the bands and the corresponding edges of the belts 16 and 22.
  • Lateral retention means different from those just described could however be used, and in particular retention means consisting of two longitudinal elastic ribs applied along each side of the lower belt 16.
  • counteracting means can also be provided on the inside of the lateral bands 42 and 44 to prevent, in the case of high working pressures of the machine 10, any outward deformation of the inner branches of the bands 42 and 44. This deformation can cause significant lateral loss of powder or even damaging displacements thereof.
  • These lateral counteracting means can be of the same type as those already described in relation to the counteracting means 38 and 40 of the lower and upper conveyor devices 12 and 14.
  • the counteracting means 38 and 40 take a rectilinear parallel path along their final downstream portion (indicated by A in Figure 4), with their distance apart substantially equal to the distance between the surfaces of the two most downstream rollers 18, 24.
  • the maximum compaction pressure occurs along the portion A.
  • Means are provided at the supports for the rollers 24 and 26 of the conveyor device 14 for adjusting their position. It has been found very useful to provide means for fine adjustment both in a horizontal and in a vertical direction.
  • These adjustment means can in particular comprise a bush (not shown), the inner cylindrical aperture of which is eccentric to its outer cylindrical surface. An end pin of the relative roller 24, 26 is inserted into the inner aperture of the eccentric bush, this latter being in its turn rotatably supported by a normal support bush carried by the structure of the machine 10.
  • Means are also provided for rotating the eccentric bush with respect to the support bush, this enabling optimum fine adjustment of the relative pin to be obtained both in a horizontal and a vertical direction.
  • the belts 16, 22 and the bands 42, 44 can have a non-smooth surface, for example provided with reliefs or ribs (so-called texturing).
  • the said convergence of the belt branches of the conveyor devices facilitates deaeration of the powder during its compacting.
  • the air between the powder particles always finds an exit path in the opposite direction to the direction of advancement towards downstream), where the powder is less compact.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Structure Of Belt Conveyors (AREA)
  • Press Drives And Press Lines (AREA)
  • Formation And Processing Of Food Products (AREA)
EP02001226A 2001-01-29 2002-01-17 Lineare Presse zum Verdichten von Pulvern Withdrawn EP1226927A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI010153 2001-01-29
IT2001MI000153A ITMI20010153A1 (it) 2001-01-29 2001-01-29 Macchina per compattare polveri a pressatura lineare

Publications (2)

Publication Number Publication Date
EP1226927A2 true EP1226927A2 (de) 2002-07-31
EP1226927A3 EP1226927A3 (de) 2003-09-10

Family

ID=11446628

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02001226A Withdrawn EP1226927A3 (de) 2001-01-29 2002-01-17 Lineare Presse zum Verdichten von Pulvern

Country Status (2)

Country Link
EP (1) EP1226927A3 (de)
IT (1) ITMI20010153A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1674228A3 (de) * 2004-12-22 2006-10-25 Sacmi Cooperativa Meccanici Imola Societa' Cooperativa System zum Verdichtung von pulverförmigen keramischen Werkstoffen zum Formen von Fliesen mit einem Band
EP1669177A3 (de) * 2004-12-10 2006-11-08 Sacmi Cooperativa Meccanici Imola Societa' Cooperativa Verbesserte Anlage zur Herstellung von keramischen Fliesen oder Platten
WO2010146189A1 (es) * 2009-06-15 2010-12-23 Ozono I&D, S.L. Proceso y planta para la formación de laminas, baldosas y azulejos cerámicos
ITRE20110080A1 (it) * 2011-10-07 2013-04-08 Ativa Dispositivo per il trattamento di uno strato di materiale in polvere
IT201600091618A1 (it) * 2016-09-12 2018-03-12 Sacmi Dispositivo per la compattazione di materiale in polvere, in particolare materiale ceramico

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE125598C (de) *
US1423020A (en) * 1920-09-18 1922-07-18 A T Eddingston Molding machine
US1953704A (en) * 1930-06-02 1934-04-03 Erdmann Konrad Apparatus for manufacturing porous bodies from fibrous materials
AT137527B (de) * 1932-12-28 1934-05-11 Gustav Ing Ostersetzer Verfahren und Vorrichtung zur Herstellung von Platten aus faserstoffhaltigen Massen.
DE1683991A1 (de) * 1967-11-18 1971-04-08 Buettner Schilde Haas Ag Vorrichtung zur kontinuierlichen Herstellung von Gipsplatten
FR2308479A1 (fr) * 1975-04-21 1976-11-19 Babu Jean Pierre Procede et installation pour le moulage en continu d'elements de construction prefabriques en platre ou materiau equivalent, et elements ainsi obtenus
US4495021A (en) * 1981-08-05 1985-01-22 Goldsworthy Engineering, Inc. Apparatus for producing fiber reinforced plastic sheet structures
US4517148A (en) * 1983-11-01 1985-05-14 Macmillan Bloedel Limited Method for pressing a composite assembly
EP0958904A1 (de) * 1998-05-19 1999-11-24 Boudewijn Johannes Geul Verfahren und Vorrichtung zum Herstellen von Bauelementen aus Kalk und Sand

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE125598C (de) *
US1423020A (en) * 1920-09-18 1922-07-18 A T Eddingston Molding machine
US1953704A (en) * 1930-06-02 1934-04-03 Erdmann Konrad Apparatus for manufacturing porous bodies from fibrous materials
AT137527B (de) * 1932-12-28 1934-05-11 Gustav Ing Ostersetzer Verfahren und Vorrichtung zur Herstellung von Platten aus faserstoffhaltigen Massen.
DE1683991A1 (de) * 1967-11-18 1971-04-08 Buettner Schilde Haas Ag Vorrichtung zur kontinuierlichen Herstellung von Gipsplatten
FR2308479A1 (fr) * 1975-04-21 1976-11-19 Babu Jean Pierre Procede et installation pour le moulage en continu d'elements de construction prefabriques en platre ou materiau equivalent, et elements ainsi obtenus
US4495021A (en) * 1981-08-05 1985-01-22 Goldsworthy Engineering, Inc. Apparatus for producing fiber reinforced plastic sheet structures
US4517148A (en) * 1983-11-01 1985-05-14 Macmillan Bloedel Limited Method for pressing a composite assembly
EP0958904A1 (de) * 1998-05-19 1999-11-24 Boudewijn Johannes Geul Verfahren und Vorrichtung zum Herstellen von Bauelementen aus Kalk und Sand

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1669177A3 (de) * 2004-12-10 2006-11-08 Sacmi Cooperativa Meccanici Imola Societa' Cooperativa Verbesserte Anlage zur Herstellung von keramischen Fliesen oder Platten
EP1674228A3 (de) * 2004-12-22 2006-10-25 Sacmi Cooperativa Meccanici Imola Societa' Cooperativa System zum Verdichtung von pulverförmigen keramischen Werkstoffen zum Formen von Fliesen mit einem Band
WO2010146189A1 (es) * 2009-06-15 2010-12-23 Ozono I&D, S.L. Proceso y planta para la formación de laminas, baldosas y azulejos cerámicos
ITRE20110080A1 (it) * 2011-10-07 2013-04-08 Ativa Dispositivo per il trattamento di uno strato di materiale in polvere
IT201600091618A1 (it) * 2016-09-12 2018-03-12 Sacmi Dispositivo per la compattazione di materiale in polvere, in particolare materiale ceramico
WO2018047146A1 (en) * 2016-09-12 2018-03-15 Sacmi Cooperativa Meccanici Imola Società Cooperativa Device for compacting powder material, in particular ceramic material
US11413785B2 (en) 2016-09-12 2022-08-16 Sacmi Cooperativa Meccanici Imola Societa Cooperativa Device for compacting powder material, in particular ceramic material

Also Published As

Publication number Publication date
EP1226927A3 (de) 2003-09-10
ITMI20010153A1 (it) 2002-07-29

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