EP3802094B1 - Machine pour la formation d'articles en céramique - Google Patents

Machine pour la formation d'articles en céramique Download PDF

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Publication number
EP3802094B1
EP3802094B1 EP19732129.2A EP19732129A EP3802094B1 EP 3802094 B1 EP3802094 B1 EP 3802094B1 EP 19732129 A EP19732129 A EP 19732129A EP 3802094 B1 EP3802094 B1 EP 3802094B1
Authority
EP
European Patent Office
Prior art keywords
bearing structure
stiffening
elements
machine
stiffening elements
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Withdrawn - After Issue
Application number
EP19732129.2A
Other languages
German (de)
English (en)
Other versions
EP3802094A1 (fr
Inventor
Alessandro Bianchini
Francesco Scaramuzzi
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.)
Siti B&T Group SpA
Original Assignee
Siti B&T Group SpA
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 Siti B&T Group SpA filed Critical Siti B&T Group SpA
Publication of EP3802094A1 publication Critical patent/EP3802094A1/fr
Application granted granted Critical
Publication of EP3802094B1 publication Critical patent/EP3802094B1/fr
Withdrawn - After Issue legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B30B15/04—Frames; Guides
    • B30B15/048—Laminated frame structures

Definitions

  • the present invention relates to a machine for forming ceramic articles.
  • presses machines for forming ceramic articles, in jargon called "presses" are used for compacting ceramic powders so as to form a ceramic article to be subsequently fired.
  • Known types of forming machines generally comprise a bearing structure that can be positioned on the ground, which supports relative forming means.
  • Forming means have a supporting surface of the material to be formed, generally defined by a mold, and a mobile pressing element that moves towards/away from the supporting surface and is adapted to exert a predefined pressure on the material to be formed.
  • the presses can be of different "tonnage" depending on the force which the pressing element is able to exert on the material to be pressed.
  • the bearing structure is generally made up of a central core to which steel sheets are integrated, on which openings are defined to allow the movement of the pressing element and access to the supporting surface.
  • the constraint in the sizing of the bearing structure is to date defined by the constructive limit in the realization of the relative sheets, which cannot exceed a certain thickness.
  • US 5027638 and US 4615208 disclose machines for forming articles comprising a bearing structure which is formed by a plurality of elements mechanically connected to each other so as to allow an easy assembly of the whole machine.
  • the document US4615208 A also discloses a machine in accordance with the preamble of claim 1.
  • the main aim of the present invention is to provide a machine for forming ceramic articles which permits varying the rigidity of the relative bearing structure according to needs.
  • one object of the present invention is to make a machine for forming ceramic articles which is characterized by higher tonnages than those of the machines on the market today.
  • Another object of the present invention is to make machines for forming ceramic articles characterized by a high tonnage and which at the same time can be easily transported without the use of exceptional transport means.
  • Another object of the present invention is to simplify commissioning compared to the machines for forming ceramic articles on the market today, with particular reference to those of higher tonnage.
  • Another object of the present invention is to devise a machine for forming ceramic articles that allows overcoming the mentioned drawbacks of the prior art in the context of a simple, rational, easy, effective to use and low cost solution.
  • reference numeral 1 globally indicates a machine for forming ceramic articles.
  • the machine 1 comprises a bearing structure 2 intended, in use, to be positioned on the ground and forming means 3 associated with the bearing structure 2.
  • the forming means 3 are provided with at least one supporting surface 4 intended to support the material to be formed and with at least one pressing element 5 which is movable close to/away from the supporting surface 4.
  • the supporting surface 4 is intended to support a mold adapted to contain the ceramic material to be pressed and the pressing element 5 consists of the mobile part of a fluid-operated cylinder 6 the body of which is associated integral with the bearing structure 2.
  • the bearing structure 2 has a pair of lateral faces 2a arranged transversely to the supporting surface 4 and mutually opposite.
  • the bearing structure 2 has at least one access opening 7 to the supporting surface 4 which faces at least one of the lateral faces 2a.
  • the access opening 7 is of the pass-through type. More in detail, the cylinder 6 is housed inside the access opening 7.
  • the machine 1 comprises stiffening means 8 associated in a removable manner with the bearing structure 2.
  • the stiffening means 8 comprise at least one stiffening element 9 associated in a removable manner with at least one of the lateral faces 2a.
  • the stiffening means 8 comprise at least one pair of stiffening elements 9, each of which is associated in a removable manner with a relative lateral face 2a.
  • the stiffening means 8 can therefore comprise a plurality of pairs of stiffening elements 9, where each of these pairs comprises a stiffening element 9 associated with a lateral face 2a and the other stiffening element 9 associated with the opposite lateral face 2a. This way the bearing structure 2 keeps its symmetry with respect to a vertical median plane.
  • the stiffening elements 9 of each of the aforementioned pairs have the same thickness, the thicknesses of the different pairs of stiffening elements 9 can be different to each other.
  • the stiffening elements 9 have a substantially plate-like conformation, by this definition meaning that the dimensions of length and width are bigger than thickness.
  • each stiffening element 9 has two substantially flat (i.e. except for machining tolerances) coupling surfaces 9a. Therefore, the stiffening elements 9 directly in contact with the bearing structure 2 have a coupling surface 9a which is turned towards the relative lateral face 2a while the other coupling surface 9a is turned outwards.
  • the coupling surfaces 9a of any other stiffening elements 9 are instead facing the coupling surfaces 9a of the adjacent stiffening elements 9.
  • the stiffening means 8 comprise one or more first spacer elements 15 interposed between the bearing structure 2 and the stiffening elements 9 adjacent to it. The first spacer elements 15 are therefore adapted to prevent the lateral faces 2a from directly contacting the coupling surfaces 9a.
  • At least one of the bearing structure 2 and the stiffening elements 9 comprises a first seat 16 for housing the first spacer elements 15.
  • both the bearing structure 2 and the stiffening elements 9 adjacent to it comprise relative first seats 16, respectively defined at the lateral faces 2a and at the coupling surfaces 9a facing these, adapted to receive the first spacer elements 15 interposed between them.
  • the stiffening means 8 comprise second spacer elements (not shown in the figures) interposed between two stiffening elements 9 adjacent to each other.
  • at least one of the stiffening elements 9 adjacent to each other comprises a second seat 17 for housing the second spacer elements, which is defined at the relative coupling surface 9a.
  • the stiffening elements 9 comprise at least one through opening 10 which faces the access opening 7 of the bearing structure.
  • the through opening 10 defined on the stiffening elements has substantially the same edge as the access opening 7.
  • the through opening 10 defines a lower edge 10b, mechanically connectable to the bearing structure 2, and an upper edge 10a, which rests, in use, on top of the body of the cylinder 6.
  • the stiffening means 8 also comprise fixing means 11 of the stiffening elements 9 to the bearing structure 2.
  • the fixing means 11 comprise one or more first threaded elements 12 which connect the stiffening elements 9 together which are associated with the opposite lateral faces 2a, passing through the bearing structure 2, and tightening means 13 of these first threaded elements 12.
  • first through holes 14 which are aligned to each other following the positioning of the stiffening elements themselves, inside which the first threaded elements 12 are inserted.
  • the first spacer elements 15 also have a relative hole adapted to be fitted over the first threaded elements 12.
  • the first threaded elements 12 and the tightening means 13 are, e.g., of the type of pins and ring nuts respectively, suitably sized according to the thickness of the stiffening elements 9 and the stresses which they have to undergo.
  • the fixing means 11 comprise second threaded elements 18 connecting the bearing structure 2 to the lower edge 10b of each stiffening element 9, on which relative second holes 19 are defined.
  • the bearing structure 2 is supplied and positioned resting on the ground, if necessary through the creation of special foundations.
  • stiffening elements 9 are provided, e.g., a pair as in the embodiment shown in the illustrations, and these stiffening elements 9 are applied to the bearing structure 2 at its lateral faces 2a.
  • first threaded elements 12 are inserted inside the first holes 14 formed on the bearing structure 2, after which the first spacer elements 15 are applied so as to insert them inside the first seats 16 formed on the lateral faces 2a and then the stiffening elements 9 are fitted by inserting the first threaded elements 12 inside the relative first holes 14.
  • the stiffening elements 9 are first of all secured to the bearing structure 2 by means of the second threaded elements 18 and then the tightening means 13 are fitted, so that the stiffening elements 9, the first spacer elements 15 and the bearing structure 2 are tightened together.
  • each stiffening element 9 is fixed to the bearing structure 2 by means of the second threaded elements 18 and then the tightening means 13 are fitted so as to define a single body.
  • the modularity of the machine to which the present invention relates also considerably facilitates commissioning operations compared to machines of known type, because it allows limiting the overall dimensions and weights of the individual elements, thus also simplifying transport operations.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Sliding-Contact Bearings (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)

Claims (7)

  1. - Machine (1) pour mettre en forme des articles en céramique, comprenant :
    - une structure portante (2) destinée à être positionnée sur le sol;
    - des moyens de formage (3) associés à ladite structure portante (2), comportant au moins une surface de support (4) destinée à supporter le matériau à mettre en forme et au moins un élément de pressage (5) qui est apte à être rapproché/écarté de ladite surface de support (4), ledit élément de pressage (5) consistant en la partie mobile d'un vérin commandé par fluide (6) dont le corps est associé de manière solidaire à ladite structure portante (2);
    - des moyens de raidissement (8) associés d'une manière amovible à ladite structure portante (2);
    ladite structure portante (2) ayant une paire de faces latérales (2a), disposées transversalement à ladite surface de support (4) et mutuellement opposées, et ayant au moins une ouverture d'accès (7) à la surface de support elle-même qui fait face à au moins une desdites faces latérales (2a), et lesdits moyens de raidissement (8) comprenant au moins une paire d'éléments de raidissement (9) dont chacun est relié et associé d'une manière amovible à ladite structure portante (2) au niveau d'au moins une desdites faces latérales (2a) et comprennent des moyens de fixation (11) desdits éléments de raidissement (9) à ladite structure portante (2), lesdits moyens de fixation (11) comprenant un ou plusieurs premiers éléments filetés (12) qui relient ensemble les éléments de raidissement (9) qui sont associés auxdites faces latérales opposées (2a), traversant ladite structure portante (2), et des moyens de serrage (13) desdits éléments filetés (12), et ladite structure portante (2) et lesdits éléments de raidissement (9) comprenant un ou plusieurs premiers trous traversants (14) pour introduire lesdits premiers éléments filetés (12);
    caractérisée par le fait que lesdits éléments de raidissement (9) comprennent au moins une ouverture traversante (10) qui fait face à ladite ouverture d'accès (7), et ladite ouverture traversante (10) définissant au moins un bord supérieur (10a), qui repose, en utilisation, sur le dessus du corps dudit vérin (6), et au moins un bord inférieur (10b) apte à être relié mécaniquement à ladite structure portante (2),
    et par le fait qu'elle comprend des seconds éléments filetés (18) qui relient ladite structure portante (2) au bord inférieur (10b) de chacun desdits éléments de raidissement (9), ledit bord inférieur (10b) comprenant un ou plusieurs seconds trous (19) pour introduire lesdits seconds éléments filetés (18).
  2. - Machine (1) selon la revendication 1, caractérisée par le fait que lesdits moyens de raidissement (8) comprennent au moins un premier élément d'espacement (15) interposé entre ladite structure portante (2) et chaque élément de raidissement (9).
  3. - Machine (1) selon la revendication 2, caractérisée par le fait que lesdits moyens de raidissement (8) comprennent au moins un second élément d'espacement interposé entre deux desdits éléments de raidissement (9) adjacents l'un à l'autre.
  4. - Machine (1) selon une ou plusieurs des revendications précédentes, caractérisée par le fait que lesdits éléments de raidissement (9) ont sensiblement une conformation de type plaque, chacun desdits éléments de raidissement (9) ayant deux surfaces de couplage mutuellement opposées (9a).
  5. - Machine (1) selon la revendication 4, caractérisée par le fait qu'au moins une parmi la face latérale (2a) de ladite structure portante (2) et la surface de couplage (9a), lui faisant face, d'un élément de raidissement relatif (9) comprend au moins un premier siège (16) pour recevoir ledit premier élément d'espacement (15).
  6. - Machine (1) selon les revendications 3 et 5, caractérisée par le fait qu'au moins une des surfaces de couplage (9a) faisant face à chaque autre de deux desdits éléments de raidissement (9) adjacents l'un à l'autre comprend au moins un second siège (17) pour recevoir ledit second élément d'espacement.
  7. - Machine (1) selon une ou plusieurs des revendications précédentes, caractérisée par le fait que les éléments de raidissement (9) de chacune desdites paires ont sensiblement la même épaisseur.
EP19732129.2A 2018-05-25 2019-05-23 Machine pour la formation d'articles en céramique Withdrawn - After Issue EP3802094B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102018000005716A IT201800005716A1 (it) 2018-05-25 2018-05-25 Macchina per la formatura di manufatti ceramici
PCT/IB2019/054266 WO2019224759A1 (fr) 2018-05-25 2019-05-23 Machine pour la formation d'articles en céramique

Publications (2)

Publication Number Publication Date
EP3802094A1 EP3802094A1 (fr) 2021-04-14
EP3802094B1 true EP3802094B1 (fr) 2024-04-10

Family

ID=63312307

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19732129.2A Withdrawn - After Issue EP3802094B1 (fr) 2018-05-25 2019-05-23 Machine pour la formation d'articles en céramique

Country Status (4)

Country Link
EP (1) EP3802094B1 (fr)
BR (1) BR112020024070A2 (fr)
IT (1) IT201800005716A1 (fr)
WO (1) WO2019224759A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR345819A (fr) * 1904-07-12 1904-12-17 Carl Huber Mode de construction des cadres des presses hydrauliques
NL23583C (fr) * 1927-06-21
US4615208A (en) * 1984-03-02 1986-10-07 Hailey Robert W Hydraulic press frame
IT1196506B (it) * 1986-07-16 1988-11-16 Nassetti Ettore Spa Incastellatura perfezionata per presa,in particolare per lo stampaggio di materiali ceramici
US5027638A (en) * 1990-06-22 1991-07-02 Friestad Roland W Force-resisting structure
IT1402937B1 (it) * 2010-10-28 2013-09-27 System Spa Struttura per presse in particolare per la formatura di prodotti ceramici.
WO2016042422A1 (fr) * 2014-09-19 2016-03-24 Siti - B&T Group S.P.A. Structure non soudée pour presses ainsi que procédé pour son assemblage

Also Published As

Publication number Publication date
EP3802094A1 (fr) 2021-04-14
IT201800005716A1 (it) 2019-11-25
BR112020024070A2 (pt) 2021-02-09
WO2019224759A1 (fr) 2019-11-28

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