EP3661710B1 - Groupe de formage pour la production d'articles sanitaires - Google Patents

Groupe de formage pour la production d'articles sanitaires Download PDF

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Publication number
EP3661710B1
EP3661710B1 EP18762143.8A EP18762143A EP3661710B1 EP 3661710 B1 EP3661710 B1 EP 3661710B1 EP 18762143 A EP18762143 A EP 18762143A EP 3661710 B1 EP3661710 B1 EP 3661710B1
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EP
European Patent Office
Prior art keywords
mold
forming
group according
section
pressing members
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EP18762143.8A
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German (de)
English (en)
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EP3661710A1 (fr
Inventor
Elio MARRA
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Siti B&T Group SpA
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Siti B&T Group SpA
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    • 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
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/26—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor
    • B28B1/265—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor pressure being applied on the slip in the filled mould or on the moulded article in the mould, e.g. pneumatically, by compressing slip in a closed mould
    • B28B1/266—Means for counteracting the pressure being applied on the slip or on the moulded article in the mould, e.g. means for clamping the moulds parts together in a frame-like structure

Definitions

  • the present invention relates to a forming group for producing sanitary articles. More in detail, the present invention relates to a forming group for producing sanitary articles by pressure casting of slip inside a molding group.
  • each of these groups comprises two or more portions which can be connected together to define a forming cavity, inside which slip (or barbotine that is, in jargon, a fluid mixture containing an aqueous part and a suspended ceramic part) is then pressure cast.
  • the portions forming the forming group, and thus defining the cavity for slip casting comprise respective molds which, mutually coupled to each other so as to abut against each other at certain junction areas, define the above-mentioned cavity inside which the fluid mixture is directly poured.
  • the individual portions of the forming group - bearing the respective molds - may be mutually distanced at this point, to allow the extraction of the article itself, which will then be subjected to firing to obtain the final product.
  • the molds can be made, for example, in porous resin, which has replaced the traditional gypsum over time.
  • forming groups are usually connected to a support frame, in a hung configuration; more particularly, said forming groups are associated, in series, with a portal frame provided with at least one horizontal beam, to which the various forming groups are hanged side by side so as to be slidably longitudinally movable along the same.
  • each forming group can be mutually approached and coupled in order to delimit the forming cavity, or mutually distanced to allow the extraction of the sanitary article, once solidified, from the group itself.
  • the aforesaid pressing means are brought into direct contact, on opposite sides, with the lateral sides of the forming groups arranged at the ends of the series, and they exert a tightening action on the forming groups, having a horizontal direction (i.e., parallel to the axis of said support beam).
  • EP 1905561 A2 and WO 2011/095862 A1 describe the equipment for the production of sanitary articles by pressure casting of slip inside modular molds.
  • EP 1905561 A2 discloses a forming group for producing sanitary articles in accordance with the preamble of claim 1.
  • the tightening and lateral containment action effected by the pressing members of the support frame of the line may not in itself be sufficient to ensure the optimum contrast of the pressure of the poured fluid mixture into the forming cavities, in the various directions in which it is performed.
  • some areas of the molds, or some junction areas between them, may become particularly critical as relating to pressure stresses and consequent induced deformations, as well as with regard to the fluid seal of the molding chamber.
  • a specific technical solution of this type provides that, between said containing means and some of the portions of the forming group, inflatable elements with appropriate geometry and size are interposed.
  • the inflatable elements are filled with a suitable liquid or gaseous fluid, having a pressure such as to counterbalance slip pressure: the stresses and the possible consequent deformations of the molds of the forming portions, including the stresses occurring along directions not parallel to the tightening action of the horizontal pressing members of the support frame, are thus allowed to be limited.
  • the inflatable elements being positioned in correspondence with mechanical parts in mutual movement, are subject to wear, and therefore they often must be replaced after a very limited number of production cycles. Additionally, the contrast to fluid pressure effected with inflatable elements cannot, due to its nature, be controlled and fine-tuned.
  • the technical task of the present invention is to improve the state of the art in the field of forming groups for producing sanitary articles.
  • Another object of the present invention is to provide a forming group for producing sanitary articles to effectively counteract the high pressure of the poured fluid mixture into the forming chambers to ensure the correct coupling between the molds.
  • Yet another object of the present invention is to provide a forming group for producing sanitary articles in which excessive deformations in the molds due to the high pressure at which the fluid mixture is cast are prevented.
  • a further object of the present invention is to provide a forming group for the manufacture of sanitary articles where the junction areas of the molds of the various forming groups are properly maintained in mutual contact during the flow of the fluid mixture.
  • Yet another object of the present invention is to provide a forming group for constructively simple and cost-effective sanitary articles.
  • An additional object of the present invention is to provide a forming group for producing sanitary articles that is easy to use.
  • the forming group comprises at least one support frame, at least one first portion and one second portion associated with the frame, respectively bearing at least one first mold and one second mold selectively connectable to each other, so as to define at least one forming cavity adapted to receive the casting of at least one pressurized fluid mixture which, once solidified, forms at least one sanitary article.
  • the first portion and the second portion are connected to the frame in the hung configuration and are able to be selectively and mutually approachable in a closed configuration, so as to bring into mutual contact the molds to define said forming cavity, and mutually movable away in an open configuration in order to allow the extraction of the sanitary article once it is formed inside the cavity.
  • At least the first portion of the forming group comprises a plurality of pressing members which abut against the perimeter surface of the first mold in said closed configuration, at least one flexible and non-extensible tightening element which encloses said pressing members, and traction means associated with the tightening element.
  • a forming group for producing sanitary articles is generally indicated with the reference number 1.
  • the forming group 1 comprises a support frame 2.
  • the forming group 1 comprises at least one first portion 3 and one second portion 4.
  • the first portion 3 and the second portion 4 are associated with the frame 2.
  • the first portion 3 and the second portion 4 respectively have a first mold 5 and a second mold 6, respectively.
  • the first mold 5 and the second mold 6 can be replaced, for example, for maintenance purposes or to produce a different sanitary article.
  • the first mold 5 and the second mold 6 can be selectively linked together so as to define at least one forming cavity 7.
  • first mold 5 and the second mold 6 can be coupled to each other at one or more junction surfaces, delimiting the forming cavity 7.
  • the forming cavity 7 is suitable for receiving the casting of at least one pressurized fluid mixture which, once solidified, forms at least one sanitary article.
  • the sanitary article realized by group 1 can be of any kind; in some embodiments of the invention, the sanitary article can be, for example, a toilet bowl, a bidet, a rinsing tank for a toilet bowl, or the like, without any particular limitation.
  • the first portion 3 and the second portion 4 are connected to the frame 2 in the hung configuration, as will be further clarified in the following.
  • the first portion 3 and the second portion 4 are selectively and mutually approachable in a closed configuration so as to bring into mutual contact at least the first mold 5 and the second mold 6 to define the above forming cavity 7 (as shown in figure 2 ).
  • the first mold 5 - as visible, for example, in Figure 3 or in Figure 7 - has a front surface 5a, in which at least a recess 8 is provided helping to define the forming cavity 7 of the sanitary article, as will be better explained in the following.
  • the first mold 5 has a perimeter surface 5b which does not help to define the forming cavity 7, but which performs other functions, as will be better described later.
  • the first mold 5 has a parallelepiped conformation or substantially parallelepiped, in which therefore the perimeter surface 5b is composed of four flat or substantially flat surfaces.
  • the first portion 3 and the second portion 4 are also mutually movable away in an open configuration - shown, for example, in Figure 1 - to allow the extraction of the sanitary article, once it is formed inside the forming cavity 7.
  • At least the first portion 3 of the forming group 1 comprises a plurality of pressing members 9, 10, 11, which abut against the perimeter surface 5b of the first mold 5 in the aforesaid closed configuration.
  • the first portion 3 comprises at least one flexible and non-extensible tightening element 12.
  • Such tightening element 12 in said closed configuration is tensioned, and externally encircles the pressing members 9, 10, 11, so as to effectively counteract the pressure of the fluid mixture inside the forming cavity 7.
  • the frame 2 comprises at least one horizontal or substantially horizontal structure 13.
  • the horizontal structure 13 is connected, in the hung configuration, at least to the first portion 3 and the second portion 4, according to the modes best described below.
  • the first portion 3 of the forming group 1 comprises a first support reinforcement 14.
  • the first reinforcement 14 comprises at least four consecutive sections 14a, 14b, 14c, 14d, connected to each other at reciprocal junctions, so as to conform a substantially square frame structure.
  • the first support reinforcement 14 comprises: a first section 14a, a second section 14b, a third section 14c and a fourth section 14d, connected to each other in succession.
  • the first section 14a of the first reinforcement 14, which is arranged superiorly in use, is intended for the hung connection to the horizontal structure 13 of the frame 2.
  • the conformation of the first support reinforcement 14 of the first portion 3 may, however, be different from the one described, in relation to specific application needs, without any particular limitations.
  • the first support reinforcement 14 of the first portion 3 is connected to the horizontal structure 13 of the frame 2 by means of at least a first carriage element 15 and a second carriage element 16.
  • the first carriage element 15 and the second carriage element 16 are movable along respective rails of the horizontal structure 13 so that the first portion 3 can be translated along a first direction A.
  • the first carriage element 15 and the second carriage element 16 are provided with respective rolling wheels or rollers 15a, 16a along the rails of the horizontal structure 13.
  • At least the first carriage element 15 is selectively movable from a working position of coupling to the horizontal structure 13 to an idle position of free decoupling of the first portion 3 from the horizontal structure 13 itself.
  • At least the first carriage element 15, when necessary, may be selectively disengaged from the respective rail to remove the first portion 3 from the forming group 1, for example for replacement, maintenance or other reasons.
  • the first carriage element 15 and the second carriage element 16 are associated with a first beam 17 to which, in turn, the first section 14a of the first support reinforcement 14 is fixed.
  • the first mold 5 is connected to the first support reinforcement 14.
  • the pressing elements 9, 10, 11 of the first portion 3 provide for retaining the first mold 5 in the correct molding position.
  • the tightening element 12 is selected from a cable, a chain, a belt, a strap or a combination of the aforementioned elements, or a combination of distinct portions or sections constituted by the aforesaid elements.
  • the tightening element 12 can be made of any material suitable for supporting the tensile stresses to which it is subjected during the forming phase; the material with which the tightening element 12 is made can also be a composite material. According to another aspect of the invention, the tightening element 12 comprises a first end 12a and a second end 12b which are opposite to each other.
  • At least one of the first end 12a and the second end 12b is associated with traction means, indicated as a whole with 18, provided in the first portion 3 of the forming group 1.
  • both the first end 12a and the second end 12b are associated with said traction means 18, provided in the first portion 3.
  • the traction means 18 comprise at least one actuator 19, provided with a fixed element 19a joined to the first portion 3, and with a movable element 19b joined to the first end 12a and/or to the second end 12b of the tightening element 12; preferably, the movable element 19b of the actuator 19 is joined to both the first end 12a and the second end 12b of the tightening element 12.
  • the tightening element 12 is substantially closed in a loop around the pressing members 9, 10, 11 (as shown, for example, in Figure 12 ).
  • the traction means 18 comprise two actuators 19, arranged in parallel.
  • the traction means 18 could comprise a single actuator 19, having suitable characteristics.
  • the actuator 19 (or the actuators 19, if present in a number greater than one) may be, for example, of a pneumatic type, wherein the fixed element 19a comprises a cylinder, and the movable element 19b by the relative stem, sliding with respect to the cylinder.
  • the actuator 19 (or the actuators 19) could be of different types, for example, electromechanical, oleodynamic.
  • the fixed elements 19a of the actuators 19 are associated with a plate 19c fixed, in turn, to the fourth section 14d of the first support reinforcement 14.
  • the traction means 18 further comprise one traction member 20.
  • the traction member 20 has a central portion to which the movable element 19b (or the movable elements 19b) is connected; the traction member 20 further comprises two opposite peripheral portions, to which the first end 12a and the second end 12b of the tightening element 12 are respectively fixed.
  • the first end 12a of the tightening element 12 is connected to the traction member 20 in a rigid manner (as shown, for example, in Figure 10 , through threaded connection members, or the like).
  • the second end 12b is connected to the traction member 20 by means of an articulated coupling 21: allowing to compensate for any small misalignments in the assembly of the parts that constitute the first portion 3 and/or the traction means 18.
  • each of the pressing members 9, 10, 11 comprises a respective external portion 22 provided with means 23 for coupling with the tightening element 12.
  • Said coupling means 23 are adapted to allow the relative sliding of the tightening element 12 with respect to the external portion 22 of each of the pressing members 9, 10, 11.
  • Said coupling means 23 comprise, for example, a plurality of wheels 24, rotatably supported in the external portion 22 of each of the pressing members 9, 10, 11.
  • Each of said wheels 24 comprising a respective peripheral portion 24a, in which the tightening element 12 is engaged.
  • the traction means 18 comprise a first transmission roller 25 and a second transmission roller 26, associated with the first portion 3 (more in detail, associated with the fourth section 14d of the first support reinforcement 14).
  • the tightening element 12 is engaged in the aforesaid transmission rollers 25, 26; the transmission rollers 25, 26 are therefore interposed between the pressing members 9, 10, 11 and the actuator 19 (or the actuators 19).
  • the traction means 18 comprise two identical tightening elements 19, which engage in respective coupling means 23 provided in the pressing members 9, 10, 11.
  • the coupling means 23 consequently comprise a plurality of pairs of wheels 24 which are coaxial to each other (as shown, for example, in Figure 11 ), in which the two tightening elements 12 are respectively engaged.
  • the traction member 20 is also shaped so as to make the connection to both tightening elements 12.
  • the traction means 18 comprise two parts specular to each other with respect to an ideal vertical and front-back symmetry plane of the first portion 3, each of which comprising a proper tightening element 12 and the respective means 23 for coupling to the pressing members 9, 10, 11.
  • the traction means 18 could comprise a single tightening element 12, with corresponding coupling means 23 comprising a single row of coplanar wheels 24 (for example, in the case of molds 5, 6 not particularly extensive in the sense of depth).
  • the aforesaid pressing members 9, 10, 11 comprise, more particularly, a first pressing member 9, a second pressing member 10 and a third pressing member 11.
  • the first, second, third pressing members 9, 10, 11 are respectively arranged on three consecutive sides of a rectangle, or a square; at the fourth side of said rectangle or square (and therefore in correspondence with the fourth section 14d of the first support reinforcement 14) the aforesaid traction means 18 are provided.
  • Each of the pressing members 9, 10, 11 comprises a respective operating portion 27 for abutting against the perimeter surface 5b of said the first mold 5, and the aforementioned external portion 22 which cooperates with the tightening element 12 (or the tightening elements 12).
  • the operating portion 27 can be flat, or it may also have a different conformation.
  • the external portion 22 of each of the pressing members 9, 10, 11 comprises a respective substantially arc-shaped profile 28.
  • the means 23 for coupling to the tightening element 12 are arranged along said profile 28.
  • the profile 28 can be made with different dimensional or shape characteristics so as to obtain, correspondingly, different pressure conditions of each of the pressing members 9, 10, 11 on the perimeter surface 5b of the first mold 5.
  • the first mold 5 is, more particularly, a female mold, while the second mold 6 is a male mold.
  • the first mold 5 comprises at least one recess 8
  • the second mold 6 comprises, correspondingly, at least one relief 29.
  • the coupling of the relief 29 inside the recess 8 defines the forming cavity 7 for the realization of the objects.
  • the first mold 5 comprises three recesses 8
  • the second mold 6 comprises, correspondingly, three reliefs 29.
  • the conformation of the molds 5, 6 can however be of any kind, without limitations to the purposes of the present invention.
  • the embodiment shown in the figures is of particular practical interest, in which the first mold 5 - on which the peripheral surface 5b, act, in fact, the pressing members 9, 10, 11 - comprises one or more recesses 8 - i.e., is a female mold - in that it defines the outermost portion of the forming cavity 7.
  • the first pressing member 9 is arranged, in use, above the first mold 5. Moreover, the second pressing member 10 is disposed, in use, laterally with respect to the same first mold 5.
  • each of the pressing members 9, 10, 11 is selectively movable, i.e. adjustable in position, with respect to the first support reinforcement 14 of the first portion 3.
  • the first portion 3 comprises first, second, third elastic connection means 30, 31, 32 respectively of the first pressing member 9, of the second pressing member 10 and of the third pressing member 11 to the first support reinforcement 14.
  • the first, second, third elastic connection means 30, 31, 32, during the mixture casting phase, operate in contrast to the tension exerted, on the pressing members 9, 10, 11 by the traction means 3.
  • the first elastic connection means 30 comprise first threaded bars 33, with respective first ends connected - in an adjustable manner - to the first pressing member 9, and slidably engaged inside respective first seats 34 associated with the first section 14a of the first support reinforcement 14.
  • first helical springs 35 inserted along the first bars 33 themselves.
  • the first springs 35 therefore oppose the movement away of the first pressing member 9 from the first section 14a of the first support reinforcement 14 - that is, they oppose the descent of the first pressing member 9 - so as to maintain the first pressing member 9 itself hanging from the aforementioned first section 14a.
  • the first portion 3 further comprises first means 36 for adjusting the position of the first pressing member 9 with respect to the first support reinforcement 14.
  • the first adjustment means 36 comprise, in more detail, the first threaded rods 37 having their respective first ends connected - in an adjustable manner - to the first pressing member 9, and the second ends adapted to abut against respective first stop portions 38 provided in the first section 14a of the first support reinforcement 14.
  • the first adjustment means 36 allow to obtain the desired rest position - that is at which no traction is exerted - of the first pressing member 9 with respect to the first support reinforcement 14.
  • the first stop portions 38 constitute, in practice, an end-stop which determines, in fact, the rest position of the first pressing member 9.
  • the second elastic connection means 31 comprise second threaded bars 39, having the respective first ends connected - in an adjustable manner - to the second pressing member 10, and slidably engaged inside respective second seats 40 associated with the second section 14b of the first support reinforcement 14.
  • respective second helical springs 41 are provided, inserted along the second bars 39 themselves.
  • the second springs 41 therefore oppose the movement away of the second pressing member 10 from the second section 14b of the first support reinforcement 14.
  • the third elastic connection means 32 comprise third threaded bars 42, with respective first ends connected - in an adjustable manner - to the third pressing member 11, and slidably engaged inside respective third seats 43 associated with the third section 14c of the first support reinforcement 14.
  • the third elastic connection means 32 acts, in practice, by shock-absorbing elements which accompany the descent of the third pressure element 11 into the respective rest position, when the action of the traction means 18 ceases, so as to avoid collisions.
  • the first portion 3 comprises second means 45 for adjusting the position of the third pressing member 11 with respect to the first support reinforcement 14.
  • the second adjustment means 45 comprise, in more detail, second threaded rods 46 having their respective first ends connected - in an adjustable manner - to the third pressing member 11, and the second ends adapted to abut against respective second stop portions 47 provided in the second section 14c of the first support reinforcement 14.
  • the second adjustment means 45 allow to obtain the desired rest position of the third pressing member 11 with respect to the first support reinforcement 14.
  • the back - or rear face - of the first mold 5 is associated with a respective first rigid plate-shaped support 48, which is therefore opposed to the forming cavity 7.
  • the second portion 4 of the forming group 1 comprises a second support reinforcement 49.
  • the second support reinforcement 49 has a conformation which, in use, is substantially shaped as a laying down "C", with its opening facing downwards.
  • the second support reinforcement 49 comprises a central section 49a and two lateral sections 49b, 49c opposite to each other.
  • the second support reinforcement 49 of the second portion 4 is connected to the horizontal structure 13 of the frame 2 by means of a third carriage element 50 and a fourth carriage element 51.
  • the third carriage element 50 and the fourth carriage element 51 are movable along the above-mentioned rails of the horizontal structure 13 so that the second portion 4 can be translated along a horizontal direction.
  • the third carriage element 50 and the fourth carriage element 51 are provided with respective rolling wheels or rollers 50a, 51a along the rails of the horizontal structure 13.
  • At least the third carriage element 50 is selectively movable from a working position of coupling to the horizontal structure 13 to an idle position of free decoupling of the second portion 4 from the horizontal structure 13 itself.
  • At least the third carriage element 50 when necessary, may be selectively disengaged from the respective rail to remove the second portion 4 from the forming group 1, for example for replacement, maintenance or other reasons.
  • the third carriage element 50 and the fourth carriage element 51 are associated with a second beam 52 to which, in turn, the central section 49a of the second support reinforcement 49 is fixed.
  • the second portion 4 of the forming group 1 comprises rotation means 53 of the second mold 6 from a substantially vertical forming position in use, to a substantially horizontal discharge position in use of the formed article.
  • the rotation means 53 comprise at least one table 54, to which the back of the second mold 6 is fixed; the table 54 is hinged to the second support reinforcement 49 at a first axis 55.
  • the rotation means 53 further comprise rotary actuator means 56, adapted for rotating said table 54 from the substantially vertical position to the substantially horizontal position, and vice versa.
  • the rotary actuator means 56 comprise, more particularly, at least one linear actuator 57, having a first end 57a articulated to the second support reinforcement 49 at a second axis 58 ( Figure 6 ), and a second end 57b articulated to the table 54 in a third axis 59, parallel to the second axis 58 ( figures 14,15 ), so as to provide a thrust crank gear.
  • the first axis 55 for articulating the table 54 to the second support reinforcement 49 is provided at the lateral sections 49b, 49c of the latter.
  • the rotary actuator means 56 comprise two linear actuators 57, the respective first ends 57a of which are articulated to the central portion 49a of the second support reinforcement 49.
  • the two linear actuators 57 are arranged along the lateral sections 49b, 49c of the second support reinforcement 49.
  • the third axis 59 is provided in two respective appendages 60,61, which branch off from the two opposite sides of the table 54 at which the first axis 55 is also provided, so as to obtain the necessary center line to easily rotate the table 54 by means of the aforesaid thrust crank gear.
  • the linear actuators 57 may be, for example, pneumatic, or electromechanical, or oleodynamic, without specific restrictions.
  • the reciprocal approach of the first portion 3 and of the second portion 4 determines, more in detail, the engagement of the reliefs 29 of the second mold 6 inside the recesses 8 of the first mold 5, until the surfaces of mutual junction of the two molds 5, 6 match.
  • the molds 5, 6 enclose the forming cavity 7 between them.
  • the casting of the fluid mixture is carried out inside the forming cavity 7; simultaneously, at the start of the casting phase, or at a subsequent instant, the traction means 18 of the first portion 3 are activated.
  • the tightening element 12 encircles the perimeter of the pressing members 9, 10, 11 as a loop.
  • the traction means 18 are released, and the forming group 1 is returned to the open configuration of Figure 1 , at which the sanitary article can be extracted from the group 1.
  • the rotation means 53 - if present - may also be actuated in order to bring the table 54 in a horizontal or substantially horizontal position: in this position, the article realized within the forming group 1 can be more easily extracted, since it can be separated from the second mold 6 by simple fall.
  • the separation of the article formed by the molds 5, 6 can be carried out with other suitable means.
  • the release of the traction means 18 allows the pressing members 9, 10, 11 to return to their rest positions, thanks to the action of the elastic connection means 30, 31, 32.
  • the release of the traction means 18, and therefore the release of the pressure exerted by the pressing members 9, 10, 11 on the perimeter surface 5b of the first mold 5, allows to easily separate the molds 5, 6 from each other, and consequently to extract the article from the cavity 7 with reduced frictions.
  • the object of the present invention is also a molding line comprising at least one forming group 1 as described above.
  • said molding line comprises a plurality of forming groups 1 of the type described above, all connected in a hung configuration and side by side along the horizontal structure 13 of the frame 2.
  • the molding line comprises pressing means provided at the ends of the horizontal structure 13 and acting respectively on the plate-like support 48 and on the table 54 of the forming groups 1, which are positioned at the ends of said plurality.
  • the action of such pressing means allows the forming groups 1 to be compacted side by side in order to compensate the pressure of the fluid mixture cast in the forming cavities 7 at least along the first approaching-removal direction A of the portions 3, 4 of the group 1; this action, combined with that of the pressing members 9, 10, 11, limits the possible deformations of the molds 5, 6 of the forming group 1 in correspondence with the respective junction areas, and therefore also the possible consequences that may derive from this, such as fluid leaks, residual stresses, and more.
  • the adopted technical solution is constructively simpler and cheaper than those of the known type.
  • the forming group is easy to disassemble, since it is made up of a limited number of components.
  • the technical solution according to the present invention is characterized by a greater durability over the known types of solutions, as the wear problems of the elastomeric parts composing said inflatable elements are completely eliminated.
  • the forming group for sanitary articles according to the present invention can also easily find use in pre-existing production plants for the integration or replacement of pre-existing production groups or lines.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Claims (14)

  1. Groupe de formage (1) pour la fabrication d'articles sanitaires, comprenant au moins un cadre de support (2), au moins une première partie (3) et une deuxième partie (4), associées audit cadre (2), portant respectivement au moins un premier moule (5) et un deuxième moule (6) sélectivement connectables l'un à l'autre, de manière à définir au moins une cavité de formage (7) adaptée pour recevoir la coulée d'au moins un mélange fluide sous pression qui, une fois solidifié, forme au moins un article sanitaire,
    lesdites première partie (3) et deuxième partie (4) étant reliées audit cadre (2) en configuration suspendue et pouvant être approchées sélectivement et mutuellement dans une configuration fermée, de manière à amener en contact mutuel lesdits moules (5, 6) afin de définir ladite au moins une cavité de formage (7), et pouvant s'écarter mutuellement dans une configuration ouverte afin de permettre l'extraction de l'article sanitaire une fois qu'il est formé à l'intérieur de ladite cavité (7),
    au moins ladite première partie (3) comprend une pluralité d'éléments de pression (9, 10, 11) qui butent contre la surface périphérique (5b) dudit premier moule (5) dans ladite configuration fermée, caractérisé en ce qu'au moins ladite première partie (3) comprend au moins un élément de serrage flexible et non extensible (12) qui encercle lesdits éléments de pression (9, 10, 11), et des moyens de traction (18) associés audit élément de serrage (12), et en ce que ledit élément de serrage (12) comprend au moins un câble, ou au moins une chaîne, ou au moins une courroie, ou au moins une bande, ou une combinaison des éléments précités, ou une combinaison de parties distinctes des éléments précités.
  2. Groupe selon la revendication 1, dans lequel lesdits moyens de traction (18) comprennent au moins un actionneur (19) pourvu d'un élément fixe (19a) relié à ladite première partie (3), et d'un élément mobile (19b) relié à la première extrémité (12a) et à la seconde extrémité (12b) dudit élément de serrage (12), ledit élément de serrage (12) étant fermé sensiblement comme une boucle autour desdits éléments de pression (9, 10, 11).
  3. Groupe selon l'une des revendications précédentes, dans lequel chacun desdits éléments de pression (9, 10, 11) comprend une partie externe (22) munie de moyens (23) de couplage avec ledit élément de serrage (12), lesdits moyens de couplage (23) étant adaptés pour permettre le coulissement relatif dudit élément de serrage (12) par rapport à ladite partie externe (22).
  4. Groupe selon la revendication précédente, dans lequel lesdits moyens de couplage (23) comprennent une pluralité de roues (24) supportées de manière rotative dans ladite partie externe (22), chacune desdites roues (24) comprenant au moins une partie périphérique (24a) dans laquelle ledit élément de serrage (12) est engagé.
  5. Groupe selon la revendication 3 ou 4, dans lequel chacun desdits éléments de pression (9, 10, 11) comprend une partie opérationnelle respective (27) pour venir en butée contre la surface périphérique (5b) dudit premier moule (5), ladite partie externe (22) comprenant un profil sensiblement en forme d'arc (28), lesdits moyens de couplage (23) étant agencés le long dudit profil (28).
  6. Groupe selon l'une des revendications 2 à 5, dans lequel lesdits moyens de traction (18) comprennent un premier et un second galets de transmission (25, 26) dans lesquels ledit élément de serrage (12) est engagé, interposés entre lesdits éléments de pression (9, 10, 11) et ledit actionneur (19).
  7. Groupe selon l'une des revendications précédentes, dans lequel ladite première partie (3) comprend une première armature de support (14) et dans lequel lesdits éléments de pression (9, 10, 11) comprennent un premier élément de pression (9), un deuxième élément de pression (10) et un troisième élément de pression (11) associés respectivement à une première section (14a), une deuxième section (14b) et une troisième section (14c) de ladite première armature de support (14), et dans lequel au niveau de la quatrième section (14d) de ladite première armature de support (14) lesdits moyens de traction (18) sont prévus, lesdits éléments de pression (9, 10, 11) étant respectivement agencés selon les trois côtés consécutifs d'un rectangle ou d'un carré.
  8. Groupe selon l'une des revendications précédentes, dans lequel ledit premier moule (5) est un moule femelle et ledit deuxième moule (6) est un moule mâle, ledit premier moule (5) comprenant au moins un évidement (8) pour l'insertion d'au moins un relief respectif (29) prévu dans ledit deuxième moule (6) de manière à définir ladite cavité de formage (7).
  9. Groupe selon la revendication 7 ou 8, dans lequel ledit premier élément de pression (9), ledit deuxième élément de pression (10) et ledit troisième élément de pression (11) comprennent respectivement des premiers moyens de liaison élastiques (30), des deuxièmes moyens de liaison élastiques (31) et des troisièmes moyens de liaison élastiques (32) pour lier respectivement une première section (14a), une deuxième section (14b) et une troisième section (14c) de la première armature de support (14) de ladite première partie (14), lesdits premiers, deuxièmes, troisièmes moyens de liaison élastiques (30, 31, 32) étant adaptés pour ramener lesdits éléments de pression (9, 10, 11) dans les positions de repos respectives à la fin de chaque cycle de formage.
  10. Groupe selon l'une des revendications 7 à 9, dans lequel ladite première partie (3) comprend des premiers moyens (36) pour ajuster la position dudit premier élément de pression (9) par rapport à ladite première section (14a) de ladite première armature de support (14), et des deuxièmes moyens (45) pour ajuster la position dudit troisième élément de pression (11) par rapport à ladite troisième section (14c) de ladite première armature de support (14).
  11. Groupe selon l'une des revendications précédentes, dans lequel ladite deuxième partie (4) comprend des moyens de rotation (53) pour faire tourner ledit deuxième moule (6) d'une position de formage sensiblement verticale, en cours d'utilisation, vers une position qui est sensiblement horizontale pour décharger l'objet formé, en cours d'utilisation.
  12. Groupe selon la revendication précédente, dans lequel lesdits moyens de rotation (53) comprennent au moins une table (54), associée audit deuxième moule (6), articulée à la deuxième armature de support (49) de ladite deuxième partie (4) selon un premier axe (55), et des moyens d'actionnement rotatif (56) adaptés pour faire tourner ladite table (54) depuis ladite position sensiblement verticale vers ladite position sensiblement horizontale, et vice versa.
  13. Groupe selon la revendication précédente, dans lequel lesdits moyens d'actionnement rotatif (56) comprennent au moins un actionneur linéaire (57) ayant une première extrémité (57a) articulée à la deuxième armature de support (49) de ladite deuxième partie (4) selon un deuxième axe (58), et une deuxième extrémité (57b) articulée à ladite table (54) selon un troisième axe (59) parallèle audit deuxième axe (58), de manière à constituer un pignon de vilebrequin de poussée.
  14. Ligne de formage d'articles sanitaires, comprenant un cadre de support (2) muni d'au moins une structure horizontale (13), une pluralité de groupes de formage (1) selon l'une des revendications 1 à 13, reliés à ladite structure horizontale (13) en configuration suspendue et côte à côte, et des moyens de pression prévus aux extrémités de ladite structure horizontale (13), qui agissent sur des surfaces appropriées des groupes de formage (1) qui sont situées aux extrémités de ladite pluralité, de manière à retenir lesdits groupes de formage (1) dans les configurations fermées respectives dans lesquelles ils définissent les cavités de formage respectives (7).
EP18762143.8A 2017-08-01 2018-08-01 Groupe de formage pour la production d'articles sanitaires Active EP3661710B1 (fr)

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IT102017000088775A IT201700088775A1 (it) 2017-08-01 2017-08-01 Gruppo di formatura per la produzione di articoli sanitari
PCT/IB2018/055779 WO2019025999A1 (fr) 2017-08-01 2018-08-01 Groupe de formage pour la production d'articles sanitaires

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EP3661710B1 true EP3661710B1 (fr) 2022-06-08

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IT201900016460A1 (it) * 2019-09-17 2021-03-17 Siti B & T Group Spa Attrezzatura per la produzione di articoli sanitari

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ITBO20060660A1 (it) * 2006-09-27 2008-03-28 Sacmi Cooperativa Meccanici Imola Soc Coop Stampo per la produzione di manufatti sanitari in materiale ceramico.
IT1398078B1 (it) * 2010-02-03 2013-02-07 Sir Soc Italiana Resine Spa Impianto per il colaggio in pressione di articoli igienico-sanitari

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