WO2006063940A1 - Utilisation d'un moule a base de caoutchouc dans la production de dalles de pierres agglomerees et son procede de fabrication - Google Patents

Utilisation d'un moule a base de caoutchouc dans la production de dalles de pierres agglomerees et son procede de fabrication Download PDF

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Publication number
WO2006063940A1
WO2006063940A1 PCT/EP2005/056383 EP2005056383W WO2006063940A1 WO 2006063940 A1 WO2006063940 A1 WO 2006063940A1 EP 2005056383 W EP2005056383 W EP 2005056383W WO 2006063940 A1 WO2006063940 A1 WO 2006063940A1
Authority
WO
WIPO (PCT)
Prior art keywords
rubber
film
layer
mould
mix
Prior art date
Application number
PCT/EP2005/056383
Other languages
English (en)
Inventor
Dario Toncelli
Original Assignee
Dario Toncelli
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 Dario Toncelli filed Critical Dario Toncelli
Publication of WO2006063940A1 publication Critical patent/WO2006063940A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
    • 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
    • B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
    • B28B7/346—Manufacture of moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • B29C33/40—Plastics, e.g. foam or rubber
    • B29C33/405—Elastomers, e.g. rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
    • B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene

Definitions

  • the present invention relates to a mould used for the production of slabs of agglomerated stone material and to a method for the manufacture thereof.
  • the tray-shaped moulds used hitherto in the abovementioned techniques have been produced in the form of a sandwich consisting of one or more cloths arranged inside and several rubber layers for coating the outer surface of the moulds, both that of the base of the moulds and that of the cover (see EP-A- 1,027,205 and WO-A-01 42007).
  • the resins used as a binder for the mix emit, in particular during hot-hardening of the abovementioned slabs (involving temperatures in the region of 120-130 0 C), vapours which have an aggressive action on the rubber.
  • the polyester resins emit styrene vapours prone to cause the rapid deterioration of the rubber surface of the moulds.
  • the protective sheet consists of a disposable film arranged between the rubber-coated surface and the mix.
  • the material from which the film is made is normally based on PVA (polyvinyl alcohol), which is impermeable to the styrene vapours, resistant to the temperatures reached during hardening of the slabs and facilitates separation of the slabs from the moulds after hardening.
  • PVA polyvinyl alcohol
  • the film is both ready available in rolls, so that it may be directly applied onto the outer surface of the moulds, or may be formed in situ by means of spraying and subsequent drying.
  • a method according to the invention for manufacturing a mould comprises the steps of:
  • the rubber is EPM (i.e. a terpolymer obtained from ethylene and propylene monomers) or EPDM (Le. a terpolymer obtained from ethylene and propylene monomers and at least one third monomer consisting of a non-conjugated diene), and said film consists of a layer of PTFE (polytetrafluoroethylene) having a superficial substrate compatible with the rubber on which it is deposited.
  • PTFE polytetrafluoroethylene
  • the vulcanization operation is performed at high pressure (about 50 bar) and at a temperature of about 165°C.
  • - Fig. 1 shows in schematic form a tray-shaped mould used for the production of slabs and filled with a mix of agglomerated stone material in which the binding agent consists of resins, in particular polyester resins;
  • - Fig. 2 shows a cross-sectional view of the base of the mould according to Fig. 1, which is able to come into contact with said mix for formation of the slab.
  • a base 100 and a cover 200 of a tray-shaped mould 10 have a square or rectangular shape.
  • the base 100 consists essentially of a flat surface 12 and four side walls 14 (only two are shown in Fig. 1), while the cover 200 consists solely of a flat surface.
  • the structure shown in Fig. 2 relates to the flat surface 12 of the base 100, but also the side walls 14 of the base 100 and/or the cover 200 may have the same structure.
  • said structure comprises (as well as, in a manner already known, two layers of synthetic rubber, i.e. a lower layer 123 and an upper layer 125, and two reinforcing layers, i.e. a middle layer 124 and an outer layer 122, so as to form a sandwich) a film 130 which is combined with the upper layer of rubber 125 and partly made with one or more fluorinated polymers and partly with material compatible with the rubber of said layer 125.
  • the mix of agglomerated stone material is then spread over said film 130 during manufacture of the slabs until the end of the hardening step and is incorporated in the said structure.
  • said film 130 consists of a layer 131 of
  • PTFE polytetrafluoroethylene lined underneath with a superficial substrate or coating 132 of material compatible with the synthetic rubber from which at least the already mentioned upper layer 125 is made.
  • the superficial substrate or coating 132 acts as a layer promoting adhesion during the following vulcanization step by means of which said structure is made permanent.
  • the rubber of said layer 125 is preferably EPM (i.e. a terpolymer obtained from ethylene and propylene monomers) or EPDM (Le. a terpolymer obtained from ethylene and propylene monomers and at least one third monomer consisting of a non-conjugated diene) since they are elastomers particularly resistant to high temperatures.
  • EPM i.e. a terpolymer obtained from ethylene and propylene monomers
  • EPDM Le. a terpolymer obtained from ethylene and propylene monomers and at least one third monomer consisting of a non-conjugated diene
  • the entire film 130 may also be made using a mixture of one or more fluorinated polymers and synthetic rubber and, in this case also, incorporated in said structure.

Abstract

L'invention porte sur un moule (10) du type de ceux utilisés dans la production de dalles à partir d'un mélange de pierres agglomérées, ce moule étant constitué d'une base (100) et éventuellement d'un couvercle (200) dont la structure comprend intégralement au moins une couche de caoutchouc (125) associée à un film de surface (130) sur lequel le mélange est étalé. Le film (130) est fabriqué partiellement avec un ou plusieurs polymères fluorés et partiellement avec un matériau favorisant l'adhésion au caoutchouc de la couche de caoutchouc sous-jacente. Le procédé de fabrication de ce moule (10) est également revendiqué.
PCT/EP2005/056383 2004-12-15 2005-12-01 Utilisation d'un moule a base de caoutchouc dans la production de dalles de pierres agglomerees et son procede de fabrication WO2006063940A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTV2004A000151 2004-12-15
ITTV20040151 ITTV20040151A1 (it) 2004-12-15 2004-12-15 Stampo a base di gomma usato nella produzione di lastre di conglomerato di materiale lapideo e metodo per la sua realizzazione.

Publications (1)

Publication Number Publication Date
WO2006063940A1 true WO2006063940A1 (fr) 2006-06-22

Family

ID=36101831

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/056383 WO2006063940A1 (fr) 2004-12-15 2005-12-01 Utilisation d'un moule a base de caoutchouc dans la production de dalles de pierres agglomerees et son procede de fabrication

Country Status (2)

Country Link
IT (1) ITTV20040151A1 (fr)
WO (1) WO2006063940A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1995030A2 (fr) 2007-03-30 2008-11-26 M.E.RIN S.r.l. Moule modulaire, en particulier pour une pierre artificielle
EP2014447A2 (fr) * 2007-06-11 2009-01-14 Moretti International S.R.L. Procédé, installation et moule pour la fabrication de carreaux ou dalles en matière synthétique avec des inserts, et carreaux ou dalles ainsi obtenus
FR2923174A1 (fr) * 2007-10-08 2009-05-08 Michele Naies Procede de fabrication de pieces de construction a base d'un melange de granulats et de poudre de pierre naturelle, de liants et d'additifs,pieces de construction obtenues et machine de mise en oeuvre
WO2020058540A1 (fr) * 2018-09-19 2020-03-26 Plásticos Hidrosolubles S.L. Panneau de support pour la fabrication de placages d'agglomérés
US20210031405A1 (en) * 2016-07-20 2021-02-04 Luca Toncelli Method, plant and molds for forming slabs of agglomerate

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3773447A (en) * 1972-02-01 1973-11-20 W Barratt Apparatus for producing cement sheets
US4702877A (en) * 1985-12-31 1987-10-27 Davis Jr Lindsey B Method for molding concrete blocks or bricks
EP0433591A2 (fr) * 1989-12-22 1991-06-26 Fear S.P.A. Méthode et dispositif à capacité de production élevée pour la fabrication de blocs de béton avec une bonne précision dimensionnelle
US5238627A (en) * 1988-06-01 1993-08-24 Ngk Insulators, Ltd. Method for producing ceramics sintered article and molding method and molding apparatus to be used therefor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3773447A (en) * 1972-02-01 1973-11-20 W Barratt Apparatus for producing cement sheets
US4702877A (en) * 1985-12-31 1987-10-27 Davis Jr Lindsey B Method for molding concrete blocks or bricks
US5238627A (en) * 1988-06-01 1993-08-24 Ngk Insulators, Ltd. Method for producing ceramics sintered article and molding method and molding apparatus to be used therefor
EP0433591A2 (fr) * 1989-12-22 1991-06-26 Fear S.P.A. Méthode et dispositif à capacité de production élevée pour la fabrication de blocs de béton avec une bonne précision dimensionnelle

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1995030A2 (fr) 2007-03-30 2008-11-26 M.E.RIN S.r.l. Moule modulaire, en particulier pour une pierre artificielle
EP2014447A2 (fr) * 2007-06-11 2009-01-14 Moretti International S.R.L. Procédé, installation et moule pour la fabrication de carreaux ou dalles en matière synthétique avec des inserts, et carreaux ou dalles ainsi obtenus
EP2014447A3 (fr) * 2007-06-11 2011-08-03 Moretti International S.R.L. Procédé, installation et moule pour la fabrication de carreaux ou dalles en matière synthétique avec des inserts, et carreaux ou dalles ainsi obtenus
FR2923174A1 (fr) * 2007-10-08 2009-05-08 Michele Naies Procede de fabrication de pieces de construction a base d'un melange de granulats et de poudre de pierre naturelle, de liants et d'additifs,pieces de construction obtenues et machine de mise en oeuvre
US20210031405A1 (en) * 2016-07-20 2021-02-04 Luca Toncelli Method, plant and molds for forming slabs of agglomerate
WO2020058540A1 (fr) * 2018-09-19 2020-03-26 Plásticos Hidrosolubles S.L. Panneau de support pour la fabrication de placages d'agglomérés

Also Published As

Publication number Publication date
ITTV20040151A1 (it) 2005-03-15

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