EP0919344A2 - Matrice de pressage , en particulier pour la fabrication de tuiles - Google Patents

Matrice de pressage , en particulier pour la fabrication de tuiles Download PDF

Info

Publication number
EP0919344A2
EP0919344A2 EP98117268A EP98117268A EP0919344A2 EP 0919344 A2 EP0919344 A2 EP 0919344A2 EP 98117268 A EP98117268 A EP 98117268A EP 98117268 A EP98117268 A EP 98117268A EP 0919344 A2 EP0919344 A2 EP 0919344A2
Authority
EP
European Patent Office
Prior art keywords
press mold
mold according
mold
silicon
silicon carbide
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.)
Granted
Application number
EP98117268A
Other languages
German (de)
English (en)
Other versions
EP0919344B1 (fr
EP0919344A3 (fr
Inventor
Robert Dipl.-Ing. Kremer
Artur Lorenz
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.)
Rieter-Werke GmbH
Original Assignee
Rieter-Werke & Co KG GmbH
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 Rieter-Werke & Co KG GmbH filed Critical Rieter-Werke & Co KG GmbH
Publication of EP0919344A2 publication Critical patent/EP0919344A2/fr
Publication of EP0919344A3 publication Critical patent/EP0919344A3/fr
Application granted granted Critical
Publication of EP0919344B1 publication Critical patent/EP0919344B1/fr
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
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
    • B28B7/344—Moulds, cores, or mandrels of special material, e.g. destructible materials from absorbent or liquid- or gas-permeable materials, e.g. plaster moulds in general
    • 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
    • B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
    • B28B13/04—Discharging the shaped articles
    • B28B13/06—Removing the shaped articles from moulds
    • B28B13/065—Removing the shaped articles from moulds by applying electric current or other means of discharging, e.g. pneumatic or hydraulic discharging means

Definitions

  • the invention relates to a mold, in particular for pressing of roof tiles, with the characteristics of the generic term of claim 1.
  • Molds for roof tiles are available in different designs known.
  • the shaping surfaces of conventional molds are made either made of plaster or chrome-nickel steel.
  • Gypsum molds have an excellent peeling behavior from gypsum after pressing. Leave plaster molds recover easily and inexpensively after wear.
  • the main disadvantage of plaster molds is the heavy wear. The abrasive load on the forming Areas during the molding process lead to minimal downtimes of a maximum of 2000 pressings, after which a renewal of the Plaster mold is essential. Roof tile presses usually work with stroke rates of 5 to 30 pressings per minute. Consequently, when using plaster molds, the otherwise continuous process of roof tile pressing on average all be interrupted for two hours because of a change in shape, Efficiency of the overall system lowers. The need for constant production and supply of plaster molds and the necessary mechanical and human effort represent a significant cost factor in the manufacture of Roof tiles with plaster molds.
  • roof tile shapes made of chrome-nickel steel allow long service lives in the order of 1 million Pressing until reprocessing or renewal of the Mold.
  • the steel molds are much heavier and more expensive as plaster molds.
  • the quality that can be achieved in the long term the pressed roof tile moldings significantly worse than in pressing with plaster molds. This is particularly true of one "Polishing effect" attributable to which after long use of the steel molds at crucial points in the shaping Surfaces occurs and leads to undesirable pressing errors.
  • This Pressing errors have a greater impact, the smoother they are relevant shaping surface is made of steel. Based on these Quality losses are currently predominant in Germany Plaster molds used for the production of roof tiles.
  • the release of the molded part from the mold is done with steel molds usually either by brushing with oil or by Electroshock supports to stick the sound to the prevent shaping surfaces and thus the risk of Tearing or damage to the moldings when opening the Avoid form.
  • the silicon infiltrated silicon carbide used according to the invention (SiSiC) is initially made from the raw materials Silicon powder, silicon carbide powder and graphite or carbon powder mixed in the usual mixing ratio and in shaped a known ceramic manufacturing process.
  • SiSiC silicon infiltrated silicon carbide used according to the invention
  • Silicon infiltrated silicon carbide (SiSiC), has an excellent electrical conductivity, which is a particularly light and injury-free detachment of the moldings by electric shock enables. This is achieved in that the in itself known silicon infiltration with regard to an optimized electrical conductivity during the manufacturing process is controlled. The optimized electrical conductivity leads for an optimal detachment of the moldings from the mold Electric shock effect.
  • the trained as blocks or joined sections Shaped bodies are preferably placed on their backing on support plates, which are advantageously made of steel, releasably attached. You can choose between the back of the block or the sections from the silicon-infiltrated SiC material an elastic / plastic Intermediate layer can be arranged in a Execution advantageously consists of Teflon and a thickness of 1 can have up to 2 mm, in particular 1.4 mm.
  • FIG. 1 and 2 show a first embodiment of a press mold according to the invention in two variants.
  • the upper mold 2 has one a steel plate 20 by means of strips 21 over inclined surfaces 23 on the moldings 22 held on the bottom of which 4 and thus the mold cavity facing the bottom shaping surfaces 25 corresponding to the interior or Outer contour of a roof tile are formed.
  • the plans Back 26 of the molded body is interposed elastic Teflon layer 27 of a thickness of 1.4 mm on the plan bottom 28 of the steel plate 20.
  • Shaped body 22 beveled corresponding to the inclined surfaces 23 Surfaces 29, so that a dovetail-shaped holder for the molded body 22 is formed on the steel plate 20.
  • the lower mold 4 has a steel plate 40 attached to it Last 41 with inclined surfaces 43 which the molded body 42 over correspondingly beveled surfaces 49 against the flat top 48 of the steel plate 40 with the interposition of one Hold Teflon layer 47 corresponding to Teflon layer 27.
  • On the molded body 42 has the side facing the upper mold 2 shaping surfaces 45.
  • the shaped bodies 22, 42 solid, but have the following difference:
  • the molded body is continuous made of a silicon infiltrated silicon carbide material (SiSiC), whose silicon infiltration is controlled so that optimal electrical conductivity is achieved.
  • SiSiC silicon infiltrated silicon carbide material
  • the solid molded bodies are made 22, 42 each of a hollow cast body with an outer layer 220, 420 made of the silicon-filtered silicon carbide material and a filling 221, 421 made of a filling material, such as a carrier mass for resistance heating (not shown).
  • the filling material is, for example, one with water binding chamotte or SiC mortar or a permanently elastic, self-binding plastic casting.
  • the second embodiment according to FIGS. 3 and 4 differs by the fact that the molded body 22, 42 with the shape Surfaces 25, 45 are not designed as massive blocks, but of three sections 230, 231, 232 and 430, 431, 432 are formed. Each on the outside of the molded body 230, 232 and 430, 432 are again the inclined surfaces 28 or 48 for mounting by means of the inclined surfaces 23, 43 of the Last 21, 41 provided.
  • each molded body 22, 42 are at their parting lines 233, 234; 433, 434 either glued using an adhesive that is so soft in the warmth is that a detachment of the sections of the molded body from each other is possible, or at the parting lines 233, 234; 433, 434 adjacent sides are perfectly smooth to each other trained, for example by grinding or lapping, so that the sections after joining them at their parting lines 233, 234 and 433, 434 by the natural cohesive forces stick together.
  • the sections are 230, 231, 232 of the molded body 22 or the sections 430, 431, 432 of the molded body 42 as a hollow cast body with an outer skin 2300, 2310, 2320 or 4300, 4310, 4320 made of silicon infiltrated silicon carbide material and a filling 2301, 2311, 2321 or 4301, 4311, 4321 constructed from a filling material.
  • the sections adhere to the Parting lines 233, 234 and 433, 434 to each other by gluing or due to the fact that the Surfaces generated cohesive forces.
  • the strips can surround the moldings 22, 42 on all sides.
  • the shaped bodies 22, 42 can have open pores with such a pore size and such a pore shape that A fluid such as air or water from the mold cavity through the pores can be sucked out. You can do this in the Steel plates 20, 40 corresponding extraction channels (not shown) are provided, which are connected to a vacuum source can be (not shown).

Landscapes

  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
EP98117268A 1997-10-10 1998-09-11 Matrice de pressage , en particulier pour la fabrication de tuiles Expired - Lifetime EP0919344B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19744862 1997-10-10
DE19744862A DE19744862C2 (de) 1997-10-10 1997-10-10 Preßform, insbesondere zur Verpressung von Dachziegeln

Publications (3)

Publication Number Publication Date
EP0919344A2 true EP0919344A2 (fr) 1999-06-02
EP0919344A3 EP0919344A3 (fr) 2000-06-21
EP0919344B1 EP0919344B1 (fr) 2003-05-21

Family

ID=7845195

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98117268A Expired - Lifetime EP0919344B1 (fr) 1997-10-10 1998-09-11 Matrice de pressage , en particulier pour la fabrication de tuiles

Country Status (3)

Country Link
EP (1) EP0919344B1 (fr)
AT (1) ATE240823T1 (fr)
DE (2) DE19744862C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005007909A1 (de) * 2005-02-08 2006-08-10 Rennebeck, Klaus, Dr. Vorrichtung zur Herstellung von Formteilen aus Keramik

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011106218B3 (de) * 2011-06-07 2012-10-04 Etex Holding GmbH Tondachziegel-Nasspressform und Verfahren zur Herstellung einer Form für das Herstellen von Tondachziegeln durch Nasspressung
EP3486056A1 (fr) * 2017-11-16 2019-05-22 HÄNDLE GmbH Maschinen und Anlagenbau Presse à tuiles, moule supérieur et plaque intermédiaire

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1147425A (fr) * 1955-09-12 1957-11-25 Procédé pour faciliter le démoulage d'objets en argile, et installation pour sa mise en oeuvre
DE1584662B1 (de) * 1966-01-24 1970-01-15 Rieter Werke Haendle Presswerkzeug aus Metall zur Herstellung von Presslingen aus plastischen keramischen Massen
DE1925936A1 (de) * 1969-05-21 1970-11-26 Klaus Kirner Pressform zum Herstellen grobkeramischer Erzeugnisse und Verfahren zu ihrer Herstellung
DE2426369C3 (de) * 1974-05-31 1978-12-14 Martin 8904 Friedberg Pehl Preßform für Dachziegel mit auswechselbarer Ziegelbildeinlage aus Gips und Vorrichtung zum Vorfertigen von Ziegelbildeinlagen
DE2837900C3 (de) * 1978-08-30 1981-07-30 Norton Co., Worcester, Mass. Verfahren zur Herstellung von Siliciumcarbidformkörpern
JPH064502B2 (ja) * 1988-12-23 1994-01-19 日本碍子株式会社 セラミックスの製造方法
DE4131215C2 (de) * 1991-08-02 1996-02-08 Olaf Fischer Verwendung von gießfähigem siliciuminfiltrierten Siliciumcarbid zur Herstellung einer Form zur Erzeugung von Glasartikeln
WO1998043793A1 (fr) * 1997-03-27 1998-10-08 Rieter-Werke Händle GmbH & Co. KG Moule pour comprimer des corps de moulage en matieres plastiques

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005007909A1 (de) * 2005-02-08 2006-08-10 Rennebeck, Klaus, Dr. Vorrichtung zur Herstellung von Formteilen aus Keramik

Also Published As

Publication number Publication date
EP0919344B1 (fr) 2003-05-21
EP0919344A3 (fr) 2000-06-21
DE19744862C2 (de) 2001-05-23
DE59808433D1 (de) 2003-06-26
DE19744862A1 (de) 1999-05-06
ATE240823T1 (de) 2003-06-15

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