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WO2015181646A1 - Ensemble d'éjection pour presses pour produits en céramique - Google Patents

Ensemble d'éjection pour presses pour produits en céramique Download PDF

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Publication number
WO2015181646A1
WO2015181646A1 PCT/IB2015/052140 IB2015052140W WO2015181646A1 WO 2015181646 A1 WO2015181646 A1 WO 2015181646A1 IB 2015052140 W IB2015052140 W IB 2015052140W WO 2015181646 A1 WO2015181646 A1 WO 2015181646A1
Authority
WO
WIPO (PCT)
Prior art keywords
stem
ejection assembly
mould
jack
assembly according
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.)
Ceased
Application number
PCT/IB2015/052140
Other languages
English (en)
Inventor
Maurizio BARBANTI
Vito Perrone
Raffaele VERONESE
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
Priority to CN201580032184.2A priority Critical patent/CN106573391B/zh
Publication of WO2015181646A1 publication Critical patent/WO2015181646A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/10—Moulds with means incorporated therein, or carried thereby, for ejecting or detaching the moulded article

Definitions

  • the present invention refers to an ejection assembly for presses intended for obtaining ceramic products, e.g. tiles and the like.
  • Presses are known for making ceramic products, in particular tiles, provided with one or more forming seats, each delimited between two opposite portions, i.e. a mould, lower in use, and a punch, upper in use.
  • a step is provided for removing or ejecting the product thus obtained, which is sent to the subsequent processing steps.
  • the mould of a press for making ceramic products of conventional type comprises a portion that is fixed in use, rigidly constrained to a fixed portion of the press, in which a plurality of seats are obtained for housing the jacks with fluid-dynamic actuation, and a portion that is movable in use, which serves for ejecting the ceramic product made inside the mould.
  • ejection assemblies of fluid-dynamic type comprise four single- or double-acting jacks, on one side anchored to the portion of the mould that is fixed in use and on the other side connected to a movable plate thereof.
  • Such jacks are actuated, by means of a suitable fluid-dynamic actuation system, they move the plate of the mould between a first work position, where the forming of the ceramic product occurs, and a second work position, where the plate is lifted and the formed ceramic product is ejected in order to be sent to the subsequent processing steps.
  • fluid-dynamic jacks are provided uniformly arranged with respect to the surface of the plate, e.g. in zones adjacent to the four vertices in the case of a rectangular mould, and must be actuated in a manner such that they are moved substantially simultaneously with respect to each other and with equivalent displacements.
  • correction devices have been proposed that, by detecting the actual position of the movable portion of the mould via two position transducers, actuate the four fluid-dynamic jacks by means of two proportional valves, in a manner so as to obtain displacement speeds and amounts of the movable portion according to what was set.
  • the difficulty in controlling the actuation of the jacks of the mould is even more accentuated in the case of large-size moulds, for example provided for making tiles having at least one of the sides of one meter or greater.
  • the main object of the present invention is to improve the state of the art relative to the ejection assemblies of the presses for making ceramic products.
  • Another object of the present invention is to provide an ejection assembly for presses for making ceramic products that allows lifting/lowering the mould ejection plate in a precise and controlled manner.
  • Still another object of the present invention is to provide an ejection assembly for presses for making ceramic products that can compensate for the non- uniformities or asymmetries of distribution of the soil in the mould with different displacements for each jack that constitutes the ejection assembly itself.
  • a further object of the present invention is to provide an ejection assembly for presses for making ceramic products which avoids the abovementioned drawbacks of the ejection assemblies of fluid-dynamic type.
  • Still another object of the present invention is to provide an ejection assembly for presses for making ceramic products which is easy to make and at competitive costs.
  • Not least object of the present invention is to provide a kit for converting an ejection assembly of conventional type into an ejection assembly according to the present invention.
  • an ejection assembly for presses is provided for making ceramic products according to claim 1.
  • figure 1 is a top schematic view of a mould part for a press for making ceramic products provided with an ejection assembly according to the present invention
  • figure 2 shows a cross section view of the mould of Fig. 1 taken along the section line II-II in which two ejection assemblies according to the present invention are illustrated;
  • figure 3 illustrates a cross section view of the mould of Fig. 1 taken along the section line III-III in which two ejection assemblies according to the present invention are illustrated;
  • figure 4 is a section view in enlarged scale of a jack of the ejection assembly according to the present invention.
  • figure 5 shows a longitudinal section view, not in scale, of a variant of the jack of the ejection assembly according to the present invention.
  • an assembly for ejecting a mould of a press (not illustrated) for making ceramic products, such as tiles and the like, according to the present invention is indicated overall with the reference number 1.
  • the ejection assembly 1 comprises a fixed portion (fixed in use) of the mould that is fixed in use, namely a fixed plate 2 in which four jacks 3 are inserted, equally distributed over the surface of the mould.
  • Each jack 3 is housed in the plate 2 of the mould in a respective seat 5 (figures 2 and 3), and essentially comprises a fixed portion, specifically a cylinder 6 provided for being fixed in the seat 5, and a portion that is movable in use, i.e. stem 4 that axially moves along a longitudinal axis Z, in an entirely analogous manner to a fluid-dynamic actuator of conventional type.
  • the stem 4 is connected by means of connection means 7, 8 to a part of the mould that is movable in use on which it exerts a thrust, such movable part being intended for ejecting the ceramic product that is made inside the mould; for greater clarity in the illustration of the present invention, the aforesaid movable part is not shown in the figures.
  • connection means which comprise a ball joint, i.e. a spherical cap 7 and a ring 8 with spherical seat complementary to the corresponding spherical portion of the cap 7.
  • Such ball joint 7, 8 thus allows a certain adaptation between the stem 4 and the movable part of the mould (not illustrated), also in the case of an imperfect correspondence between the surfaces of the aforesaid elements.
  • the size of the jack 3 allow the interchangeability with the normal fluid-dynamic actuators currently used in the ejection assemblies of conventional type; for this reason, the ejection assembly 1 can also constitute a kit for converting a conventional ejection assembly into an ejection assembly according to the present invention.
  • each jack 3 the respective stem 4 is moved along the axis Z by means of motor means that are autonomous and independent from the other jacks 3, and more particularly the stem 4 is translated by means of motor means 9 of rotary and reversible type coupled to a mechanical motion conversion device 10 which transforms the rotary motion of the motor means 9 into a translating motion of the stem 4.
  • the mechanical conversion device can comprise a screw 1 1 and nut 12 assembly of the type used for transmitting an established force, for example: a recirculating ball screw or a roller screw, or a screw-nut assembly in which the screw has a generating profile having a rectangular or trapezoidal rectangular section.
  • the stem 4 to which the screw 1 1 is fixed has an oval section and is inserted in a corresponding flange 15 with oval sliding seat (for the oval shape, see figure 1).
  • the stem 4 can also have a different shape in section, or other anti-rotation devices (not illustrated) can be provided.
  • the aforesaid motor means 9 are in turn connected to the device 10 for converting the rotary motion into translating motion of the stem 4.
  • each jack 3 By means of position transducers (not illustrated), with which each jack 3 is provided, it is possible to control the displacement amount, and possibly also the displacement speed of the stem 4 of each jack 3, obtaining, according to modes explained more in detail hereinbelow, the abovementioned simultaneous and equivalent movement of the stems 4 of all the jacks 3 that constitute the ejection assembly 1.
  • the motor means 9 also comprise the position transducer, through which it is possible to indirectly obtain a signal relative to the displacement, and possibly to the speed, of the stem 4.
  • the motor means 9 can therefore comprise a position transducer, and possible speed transducer, that is for example an encoder 22 (illustrated for example in figure 4 connected in any suitable manner to a flange 26 of connection of the motor means 9), which allows indirectly obtaining the amount of movement and speed of the stem 4.
  • the jack 3 comprises a position transducer (not illustrated), and possibly speed transducer, directly connected to the stem 4.
  • the ejection assembly according to the present invention comprises braking means 23, of any suitable type; according to one version of the present invention, the aforesaid braking means are of automatic type, i.e. they are automatically activated when the motor means are stopped.
  • the braking means 23 are coupled to the motor means 9, for example between the motor means 9 and the position transducer device 22 (see in particular figure 5).
  • Such braking means 23 are provided housed in a respective housing chamber 24 delimited by a containment sleeve 25, and in use are set to maintain, locked in position, the motor means 9 when they are situated in a rest position, i.e. when they do not move the device 10 for converting rotary motion into translating motion of the stem 4.
  • the braking means 23 are provided mounted around the flange 26 of connection of the motor means 9.
  • FIG. 1 Schematically illustrated in figure 1 is a control unit 13 that receives in inlet, from each jack 3, the signal relative to the actual displacement amount attained, and possibly also a signal relative to the actual displacement speed, from each stem 4, such signal coming from the abovementioned transducer present in each jack 3.
  • this signal can come directly from the relative transducer present in each jack 3, or it can be obtained from the control unit 13 by deriving it from the current displacement signal of each stem 4 compared with the elapsed tempo.
  • the control unit 13 provides for suitably power supplying the motor means 9 of each jack 3 on the basis of the signals received by the transducers, controlling that for each of the stems 4, the movement occurs according to predetermined displacement amounts and speeds.
  • each jack 3 is capable of being moved in a completely independent manner in terms of position, peak speed, displacement dynamics, acceleration ramps and intervention times according to predetermined actuation modes.
  • All these quantities are managed by the control unit 13 on each stem 4, in a manner such that the overall movement is synchronous and uniform overall. For example, if it is desired to ensure that the plate of the mould is maintained substantially horizontal during lifting, then the stems 4 are actuated with displacement amounts that are equivalent to each other and simultaneously, i.e. with equivalent displacement speeds.
  • the stems 4 are actuated in a manner so as to compensate for the conduct variations of the carriage for loading soil in the mould; such conduct variations for example deriving from aging, wear or different characteristics of the soils used.
  • control unit 13 can coordinate the displacement and speed of each stem 4 with the carriage for loading the soft soil in the mould.
  • control unit 13 can modify the displacement and speed of each stem 4 in a manner so as to correct such defects and reduce the production waste.
  • the jack 3 as stated above comprises a cylinder 6 which at its interior encloses an actuation device that serves to impart a translating motion to the stem 4 along the axis Z.
  • the cylinder 6 is fixed to the plate 2 by means of, for example, a flanged connection with screws 21 (figures 2 and 3).
  • the size and type of connection are obtained in a manner so as to make the jack 3 completely interchangeable with the fluid-dynamic actuators of the ejection assemblies of conventional type with fluid-dynamic actuation.
  • the actuation device comprises a screw 11 connected to the stem 4 and a nut
  • the motor means can be of any type, and in particular it can comprise an electric motor 9 with alternating current or direct current, with brushes or without brushes.
  • the electric motor 9 must be reversible in order to allow the screw 1 1 and the stem 4 to translate along the axis Z in both directions, i.e. exiting for the ejection phase and returning for a subsequent ceramic product production phase.
  • the motor means 9 can also be of another type, e.g. of fluid-dynamic type.
  • the electric motor 9 comprises permanent magnets 16 and stator windings 17; the permanent magnets 16 are fixed to a rotatable sleeve 18 which is in turn connected to the nut 12.
  • the entire jack 3 assembly according to the present invention is very compact, since the screw 1 1 in the return movement comes to be at least partly inside the rotatable sleeve 18 and the motor 9 is of hollow type, being arranged around the sleeve 18.
  • the sleeve 18 is connected to the nut 12 by means of a gear reducer, for example a planetary gear reducer, in a manner so as to increase the drive torque for rotating the nut 12, if that available from the electric motor 9 with a direct connection to the nut 12 was not sufficient.
  • a gear reducer for example a planetary gear reducer
  • the sleeve 18 is rotatably mounted on a first support 19, axially fixed and placed in proximity to the screw 1 1 - nut 12 coupling, and a second support 20 in this case of axially slidable type in order to compensate for the expansion of the sleeve 18 due to the possible heating thereof.
  • the first support 19 can for example comprise a pair of opposite oblique ball bearings
  • the second support 20 can for example comprise a single ball bearing, fixed in a slidable manner.
  • the above-described ejection assembly for presses is susceptible of numerous modifications and variants within the protective scope of the following claims.
  • the nut 12 can be made directly in the sleeve 18, and it is also possible to provide, always as an example, that the permanent magnets 16 of the motor are incorporated in the sleeve 18 itself.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)

Abstract

La présente invention concerne un ensemble (1) d'éjection d'un moule d'une presse pour la fabrication d'un produit en céramique, par exemple un carreau céramique et analogue, qui comprend une pluralité de vérins (3) fixés à une plaque (2) du moule ; chaque vérin (3) est doté d'une tige (4) qui pousse sur une partie mobile du moule conçue pour éjecter le produit céramique après qu'il a été fait à l'intérieur du moule ; pour déplacer la tige (4), chaque vérin (3) comprend un moteur (9) qui est autonome et indépendant des moteurs (9) des autres vérins (3) et un transducteur de position de la tige (4) qui fournit un signal de position de la tige (4) ; les transducteurs sont reliés à une unité de commande (13) qui fournit, sur la base des signaux reçus par les transducteurs, l'alimentation au moteur (9) de chaque vérin (3), en contrôlant que la tige (4) de chaque vérin (3) est déplacée de manière complètement indépendante en termes de position, de vitesse de pointe, de dynamique de déplacement, de rampes d'accélération et de temps d'intervention.
PCT/IB2015/052140 2014-05-28 2015-03-24 Ensemble d'éjection pour presses pour produits en céramique Ceased WO2015181646A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201580032184.2A CN106573391B (zh) 2014-05-28 2015-03-24 用于陶瓷产品压力机的弹出组件

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVR2014A000154 2014-05-28
ITVR20140154 2014-05-28

Publications (1)

Publication Number Publication Date
WO2015181646A1 true WO2015181646A1 (fr) 2015-12-03

Family

ID=51220841

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2015/052140 Ceased WO2015181646A1 (fr) 2014-05-28 2015-03-24 Ensemble d'éjection pour presses pour produits en céramique

Country Status (2)

Country Link
CN (1) CN106573391B (fr)
WO (1) WO2015181646A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020065513A1 (fr) * 2018-09-24 2020-04-02 Siti - B&T Group S.P.A. Ensemble éjecteur pour un moule d'une presse pour la fabrication d'un article en céramique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110712276B (zh) * 2019-11-28 2024-11-19 陈锐 一种旋转活动齿的瓷砖模具和由该模具压制成的瓷砖

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4050666A (en) * 1976-11-19 1977-09-27 Tichelt Jake W Van Mold ejector multiplier
US4386047A (en) * 1980-02-25 1983-05-31 Cr Industries Molded article knock-out method
JPH05245883A (ja) * 1992-03-09 1993-09-24 Nippondenso Co Ltd 離型力測定金型
US5376315A (en) * 1992-11-13 1994-12-27 Kansas State University Research Foundation Method and apparatus for concrete casting of a unitary structure
EP0680812A1 (fr) * 1994-05-06 1995-11-08 Beheermaatschappij De Boer Nijmegen B.V. Machine pour la fabrication de briques crues utilisée dans l'industrie manufacturière des briques
WO1999058311A1 (fr) * 1998-05-13 1999-11-18 Velcro Industries B.V. Parties de moule pour injection avec elements de fixation
US6533972B1 (en) * 2000-02-07 2003-03-18 Uniloy Milacron Usa, Inc. Method apparatus for ejector set-up
WO2012129614A1 (fr) * 2011-03-31 2012-10-04 DE BONTE INTERNATIONAL, besloten vennootschap met beperkte aansprakelijkheid Moule pour le coulage d'un élément en béton, procédé appliqué avec celui-ci et ligne de production équipée de celui-ci

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5707414A (en) * 1996-02-07 1998-01-13 Owens-Brockway Glass Container Inc. Servo plunger mechanism
ITBO20060660A1 (it) * 2006-09-27 2008-03-28 Sacmi Cooperativa Meccanici Imola Soc Coop Stampo per la produzione di manufatti sanitari in materiale ceramico.

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4050666A (en) * 1976-11-19 1977-09-27 Tichelt Jake W Van Mold ejector multiplier
US4386047A (en) * 1980-02-25 1983-05-31 Cr Industries Molded article knock-out method
JPH05245883A (ja) * 1992-03-09 1993-09-24 Nippondenso Co Ltd 離型力測定金型
US5376315A (en) * 1992-11-13 1994-12-27 Kansas State University Research Foundation Method and apparatus for concrete casting of a unitary structure
EP0680812A1 (fr) * 1994-05-06 1995-11-08 Beheermaatschappij De Boer Nijmegen B.V. Machine pour la fabrication de briques crues utilisée dans l'industrie manufacturière des briques
WO1999058311A1 (fr) * 1998-05-13 1999-11-18 Velcro Industries B.V. Parties de moule pour injection avec elements de fixation
US6533972B1 (en) * 2000-02-07 2003-03-18 Uniloy Milacron Usa, Inc. Method apparatus for ejector set-up
WO2012129614A1 (fr) * 2011-03-31 2012-10-04 DE BONTE INTERNATIONAL, besloten vennootschap met beperkte aansprakelijkheid Moule pour le coulage d'un élément en béton, procédé appliqué avec celui-ci et ligne de production équipée de celui-ci

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020065513A1 (fr) * 2018-09-24 2020-04-02 Siti - B&T Group S.P.A. Ensemble éjecteur pour un moule d'une presse pour la fabrication d'un article en céramique

Also Published As

Publication number Publication date
CN106573391A (zh) 2017-04-19
CN106573391B (zh) 2019-04-02

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