EP0294743B1 - Giessform für Sanitärgegenstände und Verfahren zum Herstellen einer solchen Giessform - Google Patents

Giessform für Sanitärgegenstände und Verfahren zum Herstellen einer solchen Giessform Download PDF

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Publication number
EP0294743B1
EP0294743B1 EP88109000A EP88109000A EP0294743B1 EP 0294743 B1 EP0294743 B1 EP 0294743B1 EP 88109000 A EP88109000 A EP 88109000A EP 88109000 A EP88109000 A EP 88109000A EP 0294743 B1 EP0294743 B1 EP 0294743B1
Authority
EP
European Patent Office
Prior art keywords
layer
porous
application
layers
casting mould
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88109000A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0294743A3 (en
EP0294743A2 (de
Inventor
Reinhard Wegmann
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.)
Erich Netzsch GmbH and Co Holding KG
Original Assignee
Erich Netzsch GmbH and Co Holding KG
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 Erich Netzsch GmbH and Co Holding KG filed Critical Erich Netzsch GmbH and Co Holding KG
Priority to AT88109000T priority Critical patent/ATE68397T1/de
Publication of EP0294743A2 publication Critical patent/EP0294743A2/de
Publication of EP0294743A3 publication Critical patent/EP0294743A3/de
Application granted granted Critical
Publication of EP0294743B1 publication Critical patent/EP0294743B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • B28B1/261—Moulds therefor
    • B28B1/262—Mould materials; Manufacture of moulds or parts thereof
    • B28B1/263—Plastics

Definitions

  • the invention relates to a method for producing a casting mold, with which sanitary objects in particular can be produced, and the casting mold produced.
  • the layers each consist of mixtures of a synthetic resin, such as styrene resin, urethane resin or phenolic resin, with a granulate of inorganic material, such as silicon dioxide, feldspar or aluminum oxide.
  • the surface layer facing the sanitary article to be cast is fine-porous, i.e. H. has a capillary structure with a very small capillary diameter in the range of less than 10 ⁇ m diameter. This fine-porous surface layer merges into a coarse-porous layer underneath, which also consists of a granulate / synthetic resin mixture, the capillary diameter being larger than in the surface layer and in the range from 50 to 200 ⁇ m.
  • DE-OS 33 10 771 In another embodiment of DE-OS 33 10 771, several synthetic resin / granulate layers of different porosity are not provided, rather a single surface layer with a capillary structure is applied directly to a mold carrier in which a multiplicity of channels are formed.
  • a method for producing a casting mold and such a casting mold are known, in which a fine-pored front layer made of plastic is provided, which rests on the object to be produced, and to which there is a coarse-pored middle layer made of sintered metal and a dense rear layer Connect the plastic layer.
  • the use of porous sintered metal is complex and inexpensive.
  • the invention is based on the object of specifying a cost-effective method for producing a casting mold, with which in particular sanitary articles can be produced.
  • the casting mold produced according to the invention is also said to be capable of multiple use, the sanitary articles produced here having a good quality and in particular a good surface structure.
  • Claim 5 describes a casting mold which solves the above object.
  • the second and third containers used are identical or at least the same size.
  • vibration is carried out in a manner known per se.
  • the first, fine-pore layer of synthetic resin / granulate mixture has a grain size in the range from 0.4 to 2.0, preferably 0.7 to 1.3 mm in diameter. With grain sizes in this range, the diffusion width with which the plastic or plaster of the inner layer enters the first layer of synthetic resin / granulate mixture is not too large or too small.
  • the second, coarse-pore layer of synthetic resin / granulate mixture preferably has a grain size of up to 6 mm in diameter.
  • the first and the second layer of synthetic resin / granulate mixture combine.
  • 1 to 7 show in sequence the individual process steps for producing a casting mold according to the invention.
  • an enlarged intermediate mold 10 of the sanitary article to be produced with the casting mold is first produced in a manner known per se.
  • the enlarged intermediate shape 10 shown in FIG. 1 thus corresponds to a slight enlargement of, for. B. 1 cm the sanitary object that is to be produced with a casting mold.
  • the enlarged intermediate mold 10 is placed with its foot 10a on a vibrator (not shown).
  • a container 12 is also positioned on the vibrator in such a way that it surrounds the enlarged intermediate mold 10 at a distance.
  • known ventilation pipes 13 and feed pipes 15 are still drawn, but these are not an essential feature of the invention.
  • a first, fine-porous layer 14 made of granules mixed with synthetic resin is uniformly applied to the enlarged intermediate form 10 filled.
  • the first, fine-porous layer 14 has a grain size in the range from 0.4 to 2.0 mm in diameter and has a thickness of 2 to 3 cm.
  • Suitable synthetic resins and granules are known, e.g. B. from DE-OS 33 10 771.
  • the first, fine-porous synthetic resin / granulate layer 14 is applied to the enlarged intermediate shape when the vibrator is actuated.
  • a second layer 16 of granules mixed with synthetic resin is applied to the first, fine-pored synthetic resin / granulate layer 14, the granulate of the second layer 16 having a grain size which is larger than that of the granulate of the first layer 14; in the illustrated embodiment, the second layer has a grain size in the range of up to 6 mm in diameter.
  • the second layer 16 is applied in such a way that the first container 12 is filled.
  • the first and second layers 14 and 16 are in the wet state, so that they connect at their contact surface.
  • the tube 32 is positioned such that it passes through both the first layer 14 and the second layer 16.
  • the first and second layers 14, 16 are then cured to the extent that they are largely dimensionally stable.
  • the first container 12 according to FIGS. 1 to 3 is then removed and replaced by a second, larger container 18 which is used in the method steps 4 to 7 is used.
  • a free space remains between the molded body formed from the layers 14 and 16 and the second container 18, which is filled with a third layer 20 (FIG. 4) made of a non-porous sand / synthetic resin mixture.
  • the impermeable third layer 20 thus completely encloses the two inner layers 14, 16.
  • the first, second and third layers 14, 16, 20 are then cured in a known manner so that they form a coherent block 36.
  • This block 36 of layers 14, 16, 20 is removed from the container 18, whereby it is detached from the enlarged intermediate mold 10.
  • the block 36 is then further processed into a finished casting mold in accordance with the further method steps illustrated in FIGS. 5 to 7.
  • another container 18 ' which in the illustrated embodiment is identical to container 18 according to FIG. 4, is positioned over a final intermediate shape 10'.
  • the final intermediate mold 10 ' is, in contrast to the enlarged intermediate mold 10, not larger than the sanitary article to be produced with the casting mold, but corresponds to this.
  • a predetermined amount of liquid synthetic resin 30 is then entered into the container 18 'closed at the bottom.
  • the liquid synthetic resin 30 is one which is fine-porous after hardening.
  • the block 36 from the layers 14, 16 and 20 is inserted from above until it is placed on the spacers (not shown) which stand on the base 10a' of the final intermediate form 10 '. 7, the block 36 displaces the liquid synthetic resin 30, which is distributed evenly over the entire surface of the intermediate mold 10 'in the space between the final intermediate mold 10' and the first layer 14.
  • the freedom between the intermediate shape 10 'and the first layer 14 corresponds to the enlargement of the enlarged intermediate shape 10 compared to the final intermediate shape 10'. Excess plastic is discharged through the vent pipe 13.
  • Curing is then carried out, the finished casting mold consisting of layers 30, 14, 16 and 20 being formed.
  • the finished casting mold is removed from the intermediate mold 10 'and from the container 18' (previously, a release agent has been applied to the intermediate mold 10 'in a known manner) and is available as a partial mold for the production of a sanitary article.
  • a further partial shape with respect to the sanitary object is produced accordingly.
  • a plaster layer can also be used.
  • the gypsum layer thus replaces the porous plastic layer 30. It is applied in the same way as the plastic layer and connected to the three hardened layers 14, 16 and 20.
  • a commercially available hard plaster is used as the material for the plaster layer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Producing Shaped Articles From Materials (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Sanitary Device For Flush Toilet (AREA)
EP88109000A 1987-06-12 1988-06-06 Giessform für Sanitärgegenstände und Verfahren zum Herstellen einer solchen Giessform Expired - Lifetime EP0294743B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88109000T ATE68397T1 (de) 1987-06-12 1988-06-06 Giessform fuer sanitaergegenstaende und verfahren zum herstellen einer solchen giessform.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3719700 1987-06-12
DE19873719700 DE3719700A1 (de) 1987-06-12 1987-06-12 Giessform fuer sanitaergegenstaende und verfahren zum herstellen einer solchen giessform

Publications (3)

Publication Number Publication Date
EP0294743A2 EP0294743A2 (de) 1988-12-14
EP0294743A3 EP0294743A3 (en) 1989-11-29
EP0294743B1 true EP0294743B1 (de) 1991-10-16

Family

ID=6329595

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88109000A Expired - Lifetime EP0294743B1 (de) 1987-06-12 1988-06-06 Giessform für Sanitärgegenstände und Verfahren zum Herstellen einer solchen Giessform

Country Status (3)

Country Link
EP (1) EP0294743B1 (enrdf_load_stackoverflow)
AT (1) ATE68397T1 (enrdf_load_stackoverflow)
DE (2) DE3719700A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4012044A1 (de) * 1990-04-13 1991-10-17 Heidelberger Zement Ag Verfahren zur herstellung von formen, modellen und werkzeugen zur formgebung

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1238476B (it) * 1990-02-06 1993-08-18 Gaiotto Impianti Spa Stampo per la colata di prodotti ceramici
WO2006056192A2 (de) * 2004-11-25 2006-06-01 Dorst Technologies Gmbh Co. Kg Gussform, insbesondere druckgussform, verfahren zum herstellen einer solchen gussform und verfahren zum niederdruckgiessen
DE102007045806A1 (de) 2007-09-25 2009-04-02 Dorst Technologies Gmbh & Co. Kg Gießformkomponente und Verfahren zum Herstellen einer Gießformkomponente
DE102009007670A1 (de) 2009-02-05 2010-08-12 Dorst Technologies Gmbh & Co. Kg Gießformkomponente, Gießform und Verwendung einer solchen Gießform
IT1393484B1 (it) * 2009-03-31 2012-04-27 Sacmi Stampo per la realizzazione di manufatti ceramici.
DE102014201900B4 (de) * 2014-02-03 2022-06-02 Volkswagen Aktiengesellschaft Gussform und Ventilvorrichtung für eine Gussform
DE102021101103A1 (de) * 2021-01-20 2022-07-21 Dorst Technologies Gmbh & Co. Kg Verfahren zum Herstellen eines Formteils für eine Schlicker-Druckgießform

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1683803B2 (de) * 1967-01-12 1976-04-08 Form mit einem porösen Gefüge aus Kunststoff und Füllmaterial zum Vergießen von keramischen Suspensionen sowie Verfahren zur Herstellung einer solchen Form Dorst-Keramikmaschinen-Bau Otto Dorst u. Dipl.-Ing. Walter Schlegel, 8113 Kochel Form mit einem poroesen gefuege aus kunststoff und fuellmaterial zum vergiessen von keramischen suspensionen sowie verfahren zur herstellung einer solchen form
DE2352492B2 (de) * 1973-10-19 1977-08-25 Wittmoser, Adalbert, Prof Dr-Ing, 6840 Lampertheim Verfahren zur herstellung von durch unterdruck stabilisierten, hohlen giessformen
FR2457753A1 (fr) * 1979-05-28 1980-12-26 Inventa Ag Procede pour la fabrication de moules
DD156955A1 (de) * 1981-01-09 1982-10-06 Gunther Grigarczik Form zum druckfiltergiessen keramischer gegenstaende
JPS59124802A (ja) * 1982-12-29 1984-07-19 日本硬質陶器株式会社 無機材料等の湿式射出成形方法並びにその装置
DE3502348A1 (de) * 1985-01-24 1986-07-24 Gebrüder Netzsch, Maschinenfabrik GmbH & Co, 8672 Selb Verfahren und einrichtung zum druckgiessen fluessigkeitshaltiger masse
EP0234360A1 (de) * 1986-02-20 1987-09-02 Keramik Holding AG Laufen Giessform zur Erstellung von Keramikkörpern

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4012044A1 (de) * 1990-04-13 1991-10-17 Heidelberger Zement Ag Verfahren zur herstellung von formen, modellen und werkzeugen zur formgebung

Also Published As

Publication number Publication date
DE3719700A1 (de) 1988-12-22
DE3865535D1 (de) 1991-11-21
EP0294743A3 (en) 1989-11-29
EP0294743A2 (de) 1988-12-14
ATE68397T1 (de) 1991-11-15
DE3719700C2 (enrdf_load_stackoverflow) 1990-01-11

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