EP1074361B1 - Dispositif pour le remplissage de la cavité d'un moule avec un matériau , en particulier pour le pressage de carrreaux en céramique - Google Patents

Dispositif pour le remplissage de la cavité d'un moule avec un matériau , en particulier pour le pressage de carrreaux en céramique Download PDF

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Publication number
EP1074361B1
EP1074361B1 EP00202615A EP00202615A EP1074361B1 EP 1074361 B1 EP1074361 B1 EP 1074361B1 EP 00202615 A EP00202615 A EP 00202615A EP 00202615 A EP00202615 A EP 00202615A EP 1074361 B1 EP1074361 B1 EP 1074361B1
Authority
EP
European Patent Office
Prior art keywords
carriage
travel
die
travel surface
overflow
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.)
Expired - Lifetime
Application number
EP00202615A
Other languages
German (de)
English (en)
Other versions
EP1074361A3 (fr
EP1074361A2 (fr
Inventor
Ermes c/o L.B.-Officine Meccaniche-S.P.A. Bigi
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.)
L B Officine Meccaniche SpA
Original Assignee
L B Officine Meccaniche SpA
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Filing date
Publication date
Application filed by L B Officine Meccaniche SpA filed Critical L B Officine Meccaniche SpA
Publication of EP1074361A2 publication Critical patent/EP1074361A2/fr
Publication of EP1074361A3 publication Critical patent/EP1074361A3/fr
Application granted granted Critical
Publication of EP1074361B1 publication Critical patent/EP1074361B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • B28B13/0255—Disposal of residual material, e.g. by means of the return stroke of the feed drawer

Definitions

  • This invention relates to a device for loading material into the die cavity of a mould, in particular for pressing ceramic tiles.
  • devices for some time comprising a carriage having a loading compartment the lower end of which is open, and, positioned adjacent to and coplanar with the upper surface of the die, a travel surface along which the carriage loading compartment sealedly slides and which closes the lower end of the compartment.
  • the carriage is driven with reciprocating movement in a horizontal longitudinal direction between a retracted position in which the loading compartment is fed with the tile material, and an advanced position in which it lies above the die cavity, into which it releases the material through its lower end and then scrapes it with a suitable scraper means, to make it coplanar with the upper surface of the die.
  • the amount of material loaded into the carriage at each cycle is necessarily at least slightly greater than the amount which later during the same cycle is released into the die cavity, to ensure that the cavity is completely filled after scraping.
  • the residual material of one cycle can contaminate the material of the next cycle.
  • the residual material usually consists of the material of the upper layer (scraped away by the scraper means) and in the next cycle finishes up mixed with the material of the lower layer, causing possible finished product defects.
  • this material is of the type which softens at relatively low temperature, when it is heated it can soften and, as it collects in the lowest part of the tile, it can soil those machine parts with which it comes into contact, so damaging them.
  • An apparatus of the above mentioned type is disclosed in the document NL 6807426, having at least one carriage provided with a loading compartment suitable to transfer the powder material from below means for feeding the material into the loading compartment to a position above the mould cavity in which the powder falls within the mould cavity.
  • the carriage travels onto a surface coplanar with the mould cavity upper surface. At least two carriages can be provided for, to feed two different powder in the same cavity before pressing.
  • An object of the invention is to provide a device able to overcome said problems in an effective and simple manner.
  • the invention is based on the idea of making all or a part of said travel surface movable, in such a manner as to define at least one transverse overflow for the fall of the material, involving the entire width of the carriage loading compartment and of the scraper means.
  • This overflow is automatically opened by suitable means during the carriage return travel, and is closed during its outward travel.
  • the entire travel surface is movable in a horizontal longitudinal direction between an advanced position in which it is adjacent to the die and a retracted position in which it is distant therefrom so as to leave open at least one transverse region between the front edge of the travel surface and the corresponding edge of the die, to define said overflow for the fall of the material.
  • Means are also provided to move the travel surface synchronously with the carriage movement such that the carriage return travel takes place while the travel surface is in its retracted position, whereas the carriage outward travel takes place while the travel surface is in its position adjacent to the die.
  • Figure 1 is a simplified partly sectional vertical side elevation of the device of the invention applied to a press for pressing ceramic tiles.
  • Figures 1A and 1B show the same enlarged detail of Figure 1 in two different configurations.
  • Figure 2 is a section on the horizontal plane II-II of Figure 1.
  • Figure 3 is a section on the vertical plane III-III of Figure 2.
  • Figure 4 is a side view in the direction of the arrow IV of Figure 2.
  • Figure 5 is a section on the vertical plane V-V of Figure 2.
  • Figure 6 is a section on the vertical plane VI-VI of Figure 2.
  • the tile pressing mould comprises a die 9 having a flat upper surface 91 in which a cavity 8 is provided, and an upper punch 7 which interacts with the cavity 8 such as to compress a quantity of material within the cavity in order to produce a pressed tile.
  • the mould can be of multiple type, ie comprise several cavities 8 and a corresponding number of punches 7.
  • the device of the invention is associated with the mould, in order to load the material to be pressed into the cavity 8.
  • the device comprises a horizontally extending loading compartment 11 bounded by a lateral frame 12 and having in plan view a shape and dimensions identical to those of the cavity 8 (or group of cavities 8 in the case of a multiple mould), and having its lower and upper ends completely open.
  • the carriage 10 comprises two longitudinal elements 13, which support both the frame 12 and other usual members positioned to the front of the frame, such as a rotary brush 14 for cleaning the upper surface 91, a transverse pusher element 15 for pushing away from the die at each cycle that tile pressed in the previous cycle, and a scraper means 17 positioned in front of the frame 12 to scrape the material discharged into the cavity 8 in order to make it coplanar with the surface 91.
  • a horizontal travel surface 20 (defined by the upper surface of a horizontal table 22) positioned adjacent to and coplanar with the upper surface 91 of the die 9.
  • the frame 12 and scraper means 17 which are driven with reciprocating movement in the longitudinal direction between a retracted position in which the loading compartment 11 is fed with the tile material, and an advanced position in which it releases the material into the die cavity 8 through the open lower end of the compartment 11.
  • the drive means for the compartment 11 (of known type, not shown in the figures) are positioned to the rear of the travel surface 20 and drive the compartment 11 via the longitudinal elements 13.
  • the travel surface 20 is of such a size as to contain in plan view the entire compartment 11 when this is pulled rearwards into its retracted position.
  • the means 16 for feeding the material into the loading compartment 11 when this is in its retracted position.
  • the travel surface 20 is movable in a horizontal longitudinal direction between an advanced position in which it is adjacent to the die 9 and forms a single plane with the upper surface 91 thereof, and a retracted position in which the travel surface 20 is distant therefrom such as to leave open between the front edge of the travel surface and the corresponding edge of the die 9 at least one transverse region defining an overflow 21 for the fall of the material (see Figure 1).
  • a movable frame 25 upperly carrying the table 22 and supported by and constrained to a fixed frame 30 in such a manner as to be able to slide relative thereto in only the longitudinal horizontal direction.
  • the movable frame 25 is rectangular and is positioned just above the fixed frame 30, which is also rectangular and is carried by a base structure 34 resting on the ground.
  • the movable frame 25 carries on each of its two longitudinal sides 26a a pair of idle wheels 27 of horizontal transverse axis, which rotate against the upper edge of a respective lower horizontal longitudinal rail 32 fixed to a respective longitudinal side 31a of the fixed frame 30.
  • One of the two pairs of wheels 27 possesses an annular groove which engages the upper portion of the cross-section of the rail 32.
  • the other pair of wheels 27, positioned on the opposite side 26a, has a flat profile and rolls on an equally flat rail 32.
  • the movable frame 25 also carries, on each of its two longitudinal sides 26a, a central wheel 28 which rolls against the lower edge of a respective horizontal longitudinal rail 33 fixed to a respective longitudinal side 31a and positioned above the rail 28.
  • a central wheel 28 which rolls against the lower edge of a respective horizontal longitudinal rail 33 fixed to a respective longitudinal side 31a and positioned above the rail 28.
  • each side 26a of the movable frame 26 there is positioned a horizontal beam 251 to which a pair of wheels 27 is applied (see Figures 3 and 4).
  • the wheels 28 are carried by two vertical angular plates 252 extending downwards from the lower side of the beans 251.
  • On each longitudinal side 31a of the fixed frame 30 there is positioned a horizontal beam 301 to which a longitudinal element 302 parallel to the beam is fixed and carries on its upper edge the rail 32 and on its lower edge the rail 33.
  • the movable frame 25 also carries, supported by two central angular plates 252, an idle transverse shaft 35 onto the ends of which there are keyed two gearwheels 36 which engage respective horizontal longitudinal racks 37 fixed to the fixed frame 30 parallel to the direction of movement of the movable frame 25.
  • the constraint provided by the gearwheels 36 acting on the racks 37 ensures that, while moving, the movable frame 25 remains rigorously parallel to itself (translational movement) without even the smallest rotation about the vertical axis of the frame 25.
  • the device also comprises means for moving the travel surface 20 synchronously with the movement of the carriage 10 such that the return travel of the carriage 10 takes place while the travel surface 20 is in its retracted position, whereas its forward travel takes place while the surface 20 is in its position adjacent to the die 9.
  • a pneumatic cylinder-piston unit 41 is provided to move the movable frame 25 relative to the fixed frame 30 along the horizontal longitudinal direction, in order to move the travel surface 20 away from and towards the die 9.
  • the cylinder-piston unit 41 has a cylindrical body 42 carrying a pair of transverse pins 43 pivoted on elements 44 fixed to the fixed frame 30, and a movable rod 45 hinged on a transverse pin 46 carried by a bracket 47 fixed to the movable frame 25.
  • each travel stop means 58 and 59 comprises two parts, one fixed to the movable frame 25 and the other fixed to the fixed frame 30, they being positioned in mutual relationship such that they abut one against the other to define said advanced and retracted positions.
  • the damper means 50 each comprise a horizontal longitudinal rod 51 carried telescopically by a member 52 fixed to the fixed frame 30, and carrying at its free end a striker member 53 (of elastomeric material) and a compression spring 54 precompressed between the member 52 and the striker member 53. This makes contact with a downwardly projecting stop element 55 fixed to the movable frame 25.
  • Two of the means 50 operate as decelerators when the frame 25 moves in one direction, the other two operating as decelerators when the frame 25 moves in the opposite direction, and being positioned in such geometrical relationship that the travel surface 20 moves between said two end positions, ie advanced and retracted, defined by the travel limit means 58 and 59, these positions being attained without jolting by virtue of the damping action of the springs 54 and the fluid system contained within the member 52.
  • the carriage 10 is firstly brought into its retracted position, completely above the travel surface 20, where it receives the material with which to load the die 9 by the means 16. During this stage the lower end of the loading compartment 11 is closed by the surface 20.
  • the carriage 10 is then slid into its advanced position above the cavity 8 in the die 9.
  • the travel surface 20 is in its position adjacent to the upper edge of the die 9 and the loading compartment 11 is closed lowerly by the surface 20 and by the upper surface 91 of the die 9.
  • the material falls from the compartment 11 and fills the cavity.
  • the travel surface 20 On the return travel of the carriage 10 the travel surface 20 is pulled rearwards into its retracted position, to open the overflow 21.
  • the entire loading compartment 11 and the scraper means 17 therefore slide above the overflow 21 and allow the residual material (which has not been deposited in the cavity 8) to fall through the overflow.
  • the material which falls through the overflow 21 can be collected, for example by a collection hopper 61, and possibly be recirculated.
  • Means are provided for sensing the position of the carriage 10 (of known type, not shown in the figures), coordinated with the control means for the cylinder-piston unit 41, to move the travel surface 20 (in order to close and open the overflow 21) synchronously with the movement of the carriage 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Moulds, Cores, Or Mandrels (AREA)

Claims (5)

  1. Un dispositif pour le chargement du matériau dans le creux d'un moule (9), en particulier pour le pressage des carreaux de céramique, comportant un chariot de chargement (10) ayant un compartiment de chargement (11) avec son extrémité inférieure ouverte et entraînée par un mouvement alternatif dans un sens longitudinal entre une position retirée où le compartiment de chargement est alimenté avec du matériau de carreau, et une position avancée où il décharge le matériau dans le creux du moule par son extrémité inférieure ouverte, et ayant des moyens de raclage (17) pour racler le matériau dans le creux du moule, et comportant, positionnée attenante à et coplanaire avec la surface supérieure du moule, une surface de translation (20) le long de laquelle le compartiment de chargement du chariot (11) et les moyens de raclage (17) coulissent d'une façon étanche et qui ferme l'extrémité inférieure du compartiment de chargement (11), caractérisé en ce que : soit la totalité soit une partie de ladite surface de translation (20) est mobile de façon à définir au moins un trop-plein transversal (21) pour la chute du matériau, ce qui implique l'ampleur tout entière du compartiment de chargement du chariot (11) et des moyens de raclage (17), des moyens (41) étant prévus pour laisser bouger soit la totalité soit une partie de la surface de translation (20) afin respectivement d'ouvrir et de fermer ledit trop-plein (21), et étant coordonnés avec le mouvement du chariot (10) de sorte que la translation de retour du chariot ait lieu pendant que le trop-plein est ouvert, tandis que sa translation vers l'extérieur a lieu pendant que le trop-plein est fermé.
  2. Un dispositif selon la revendication 1, caractérisé en ce que la surface de translation tout entière (20) est mobile dans un sens longitudinal et horizontal entre une position avancée où elle est attenante au moule (9) et une position retirée où elle est y éloignée de façon à laisser ouverte au moins une région transversale (21) entre le bord frontal de la surface de translation et le bord correspondant du moule, en vue de définir ledit trop-plein (21) pour la chute du matériau, des moyens étant prévus pour entraîner la surface de translation en synchronie avec le mouvement du chariot de sorte que le retour du chariot ait lieu pendant que la surface de translation est dans sa position retirée, tandis que la translation vers l'extérieur du chariot a lieu pendant que la surface de translation est dans sa position attenante au moule.
  3. Un dispositif selon la revendication 1, caractérisé en ce qu'il comporte, soutenant la surface de translation, un cadre mobile (25) contraint dans un cadre fixe (30) de sorte qu'il soit en état de ne coulisser en rapport à celui-ci que dans le sens horizontal et longitudinal.
  4. Un dispositif selon la revendication 3, caractérisé en ce que le cadre mobile (25) soutient un arbre de renvoi transversal (35), sur extrémités duquel sont clavetées deux roues dentées (36) qui emboîtent des crémaillères respectives horizontales et longitudinales (37) fixées au cadre fixe (30), parallèles au sens de mouvement du cadre mobile.
  5. Un dispositif selon la revendication 3, caractérisé en ce qu'il comporte une unité pneumatique cylindre-piston (41) aménagée pour laisser bouger le cadre mobile (25) relativement au cadre fixe (30) le long du sens horizontal et longitudinal en sorte de laisser bouger la surface de translation loin du et vers le moule, et associée avec des moyens d'amortissement de chocs (50) qui définissent les positions avancée et retirée de la surface de translation.
EP00202615A 1999-08-02 2000-07-20 Dispositif pour le remplissage de la cavité d'un moule avec un matériau , en particulier pour le pressage de carrreaux en céramique Expired - Lifetime EP1074361B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRE990082 1999-08-02
IT1999RE000082A IT1310965B1 (it) 1999-08-02 1999-08-02 Attrezzatura per il caricamento del materiale nella cavita' dellamatrice di uno stampo, in particolare, per la pressatura di piastrelle

Publications (3)

Publication Number Publication Date
EP1074361A2 EP1074361A2 (fr) 2001-02-07
EP1074361A3 EP1074361A3 (fr) 2003-01-02
EP1074361B1 true EP1074361B1 (fr) 2006-08-23

Family

ID=11399479

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00202615A Expired - Lifetime EP1074361B1 (fr) 1999-08-02 2000-07-20 Dispositif pour le remplissage de la cavité d'un moule avec un matériau , en particulier pour le pressage de carrreaux en céramique

Country Status (3)

Country Link
EP (1) EP1074361B1 (fr)
DE (1) DE60030217D1 (fr)
IT (1) IT1310965B1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITRE20010073A1 (it) 2001-07-05 2003-01-05 Sacmi Metodo per il caricamento degli stampi ceramici di formatura delle piastrelle, relativi mezzi di attuazione, e piastrelle ottenuti con detti
ITRE20010072A1 (it) * 2001-07-05 2003-01-05 Sacmi Metodo per il caricamento degli stampi ceramici di formatura delle piastrelle, impianto per la sua attuazione, e piastrelle ottenute con det
ITFI20020071A1 (it) * 2002-04-29 2003-10-29 Gruppo Concorde Spa Dispositivo per il caricamento di stampi in una pressa per la produzione di piastrelle
MX2014003607A (es) * 2011-10-04 2015-01-16 Sanwa Kagaku Kenkyusho Co Dispositivo de llenado de material en polvo proporcionado con un mecanismo de recuperacion de material en polvo redundante y maquina de moldeo por compresion giratoria.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2256081A (en) * 1940-01-05 1941-09-16 Watson Stillman Co Mold-charging apparatus
DE1183001B (de) * 1960-06-08 1964-12-03 Paul Boehringer Maschinenfabri Vorrichtung zum Beschicken der Formen von Plattenpressen od. dgl.
NL6807426A (fr) * 1968-05-24 1969-11-26
JPS6351107A (ja) * 1986-08-21 1988-03-04 株式会社　後藤鉄工所 多層タイルの原料充填装置
DE3916951A1 (de) * 1989-05-24 1990-11-29 Graebener Theodor Pressensyst Fuellvorrichtung zur automatischen fuellung der matrize von pulverpressen
IT1251313B (it) * 1991-09-13 1995-05-08 Siti Spa Dispositivo per il caricamento della polvere da pressare e apparato di pressatura
JP3217686B2 (ja) * 1996-03-04 2001-10-09 株式会社イナックス タイル素地成型金型

Also Published As

Publication number Publication date
EP1074361A3 (fr) 2003-01-02
ITRE990082A0 (it) 1999-08-02
IT1310965B1 (it) 2002-02-27
EP1074361A2 (fr) 2001-02-07
DE60030217D1 (de) 2006-10-05
ITRE990082A1 (it) 2001-02-02

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