EP0531629B1 - Mould for a roof tile press - Google Patents

Mould for a roof tile press Download PDF

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Publication number
EP0531629B1
EP0531629B1 EP92109477A EP92109477A EP0531629B1 EP 0531629 B1 EP0531629 B1 EP 0531629B1 EP 92109477 A EP92109477 A EP 92109477A EP 92109477 A EP92109477 A EP 92109477A EP 0531629 B1 EP0531629 B1 EP 0531629B1
Authority
EP
European Patent Office
Prior art keywords
frame
mould
die plate
plate
pressure
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
EP92109477A
Other languages
German (de)
French (fr)
Other versions
EP0531629A1 (en
Inventor
Jochem Händle
Reinhard Dipl.-Ing. Lepsien (Fh)
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 Handle KG
Rieter Werke Haendle GmbH
Original Assignee
Rieter-Werke Handle KG
Rieter Werke Haendle 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 Handle KG, Rieter Werke Haendle GmbH filed Critical Rieter-Werke Handle KG
Publication of EP0531629A1 publication Critical patent/EP0531629A1/en
Application granted granted Critical
Publication of EP0531629B1 publication Critical patent/EP0531629B1/en
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

Definitions

  • the invention relates to a mold as the upper or lower form of a roof tile press.
  • Roof tile molds are known in various designs.
  • Usual press molds are, on the one hand, molds which consist of a plaster body enclosed by a metal frame, the surface of which is profiled for molding a compact (brick picture) (see, for example, DE-B-1 278 317).
  • Another known press mold variant consists of a nickel-chromium steel block (NiCr) with a shaping surface profile (see e.g. DE-B-1 584 662).
  • the plaster molds have the advantage that they are very light and inexpensive. Furthermore, good detachment of the wet molding from the mold with a plaster body is ensured. On the other hand, their service life is relatively short, i.e. they need to be replaced frequently. Before a new plaster mold can be used in the frame, the old plaster insert must be knocked out of the frame each time.
  • the massive NiCr steel molds have a long service life, but are comparatively heavy and expensive;
  • the high-quality alloy ensures that there is no corrosion when it comes into contact with the moist clay compact, and offers good results Removal properties for the wet molding.
  • wear occurs, the entire mold must be replaced because the tile image is firmly molded with the mold.
  • a compression mold as an upper mold or lower mold for roof tile presses.
  • the die plate is formed by a stainless steel plate of small thickness.
  • the stainless steel material can be shaped precisely, which means that a precise die surface can be produced, and offers good release properties.
  • a stiffener is a plate made of a lower-quality metal, which is adjacent to the underside of the die plate and which is strong enough to support the Record pressing force.
  • the overall material expenditure, and in particular the use of expensive materials is considerably reduced compared to known molds, as a result of which the cost and weight of the mold are reduced.
  • the stability of the stainless steel plate is much higher than that of a plaster mold, for example.
  • the frame and the lower stiffening are not wearing parts, so they remain reusable after the steel plate has worn out. If a die plate no longer achieves the required shape quality, it can be replaced with little effort without having to remove the entire mold.
  • the invention is explained in more detail below on the basis of a preferred exemplary embodiment in the drawing.
  • the single figure shows the mold in a perspective, schematic representation with a cross section.
  • 11 is the die
  • 12 is a pressure-resistant metal frame
  • 13 is a die plate
  • 14 is a stiffening plate.
  • the frame 12 can be attached to a press drum (not shown) as a frame for a lower mold or to a press stamp (not shown) as a frame for an upper mold.
  • the frame 12 is preferably made of aluminum.
  • the shaping die plate 13 is releasably attached to the frame 12 and spans the frame opening.
  • the die plate 13 is a thin, pressed stainless steel plate.
  • the stiffening plate 14 connects to the underside of the die plate 13 in a form-fitting manner to increase the strength of the press mold.
  • the stiffening plate 14, like the frame, is preferably made of aluminum and in any case sufficiently strong to fully absorb the pressure.
  • transverse and / or longitudinal ribs can be formed on the underside thereof.
  • the stiffening for the die plate can also be designed overall as a rib grid.
  • stiffening plate 14 and the corresponding die plates 13 so that the frame 12 and stiffening plate 14 can even be used for pressing different brick shapes, which additionally reduces costs and labor.
  • the frame 12 is closed on its underside, and the space enclosed by the frame 12 and the die plate 13 is poured out with an incompressible material, such as synthetic resin or plaster, to further increase the stability.
  • an incompressible material such as synthetic resin or plaster

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)

Abstract

A mould (11) as the upper mould or lower mould of a roof tile press is provided. This consists of a pressure-rigid frame (12), a female die plate (13) which spans the frame opening and has a shaping surface and a maximum compressive load resistance which is less than the compressive force, and of a pressure-resistant stiffener (14) on the plate underside, which stiffener (14) is joined to the frame.

Description

Die Erfindung betrifft eine Preßform als Ober- oder Unterform einer Dachziegelpresse.The invention relates to a mold as the upper or lower form of a roof tile press.

Dachziegel-Preßformen sind in verschiedenen Ausführungen bekannt. Übliche Preßformen sind zum eine Formen, die aus einem von einem Metallrahmen eingefaßten Gipskörper bestehen, dessen Oberfläche zum Formen eines Preßlings profiliert ist (Ziegelbild) (siehe z.B. die DE-B-1 278 317). Eine andere bekannte Preßformen-Variante besteht aus einem Nickel-Chrom-Stahlblock (NiCr) mit formgebendem Oberflächenprofil (siehe z.B. die DE-B-1 584 662). Die Gipsformen haben den Vorteil, daß sie sehr leicht und kostengünstig sind. Ferner ist eine gute Ablösung des nassen Formlings von der Form mit Gipskörper gewährleistet. Andererseits ist ihre Standzeit relativ gering, d.h. sie müssen häufig ausgewechselt werden. Bevor eine neue Gipsform in dem Rahmen eingesetzt werden kann, muß dabei jedesmal die alte Gipseinlage aus dem Rahmen herausgeschlagen werden.Roof tile molds are known in various designs. Usual press molds are, on the one hand, molds which consist of a plaster body enclosed by a metal frame, the surface of which is profiled for molding a compact (brick picture) (see, for example, DE-B-1 278 317). Another known press mold variant consists of a nickel-chromium steel block (NiCr) with a shaping surface profile (see e.g. DE-B-1 584 662). The plaster molds have the advantage that they are very light and inexpensive. Furthermore, good detachment of the wet molding from the mold with a plaster body is ensured. On the other hand, their service life is relatively short, i.e. they need to be replaced frequently. Before a new plaster mold can be used in the frame, the old plaster insert must be knocked out of the frame each time.

Die massiven NiCr-Stahlformen dagegen haben zwar hohe Standzeiten, sind aber vergleichsweise schwer und teuer; die hochwertige Legierung stellt sicher, daß beim Oberflächenkontakt mit dem feuchten Ton-Preßling keine Korrosion entsteht, und bietet gute Ablöseeigenschaften für den nassen Formling. Wenn jedoch Verschleiß auftritt, muß die gesamte Form ausgewechselt werden, weil das Ziegelbild fest mit der Form vergossen ist.The massive NiCr steel molds, on the other hand, have a long service life, but are comparatively heavy and expensive; The high-quality alloy ensures that there is no corrosion when it comes into contact with the moist clay compact, and offers good results Removal properties for the wet molding. However, if wear occurs, the entire mold must be replaced because the tile image is firmly molded with the mold.

Die beiden beschriebenen Preßform-Arten werden abhängig von den jeweiligen Anforderungen eingesetzt. Es ist bisher nicht gelungen, die Faktoren Kosten, Gewicht, Standfestigkeit und Ablösefähigkeit vorteilhaft in einer einzigen Preßform zu kombinieren.The two types of molds described are used depending on the respective requirements. So far it has not been possible to advantageously combine the factors of cost, weight, stability and releasability in a single mold.

Es ist daher Aufgabe der vorliegenden Erfindung, eine neue Preßform für Dachziegelpressen zu schaffen, die kostengünstig und vergleichsweise leicht ist, dabei aber eine hohe Standfestigkeit und eine gute Ablösefähigkeit gewährleistet.It is therefore an object of the present invention to provide a new mold for roof tile presses which is inexpensive and comparatively light, but which ensures high stability and good detachability.

Diese Aufgabe wird erfindungsgemäß durch eine Preßform als Oberform oder Unterform für Dachziegelpressen nach Patentanspruch 1 gelöst.This object is achieved according to the invention by a compression mold as an upper mold or lower mold for roof tile presses.

Mit der erfindungsgemäßen Preßform wird eine Arbeitsform geschaffen, die im Gegensatz zu bekannten Formen nicht massiv ist, wodurch ihr Gewicht erheblich reduziert werden konnte. Die Form ist aber so gestaltet, daß sie trotzdem in jedem Fall ausreichende Festigkeit gegenüber dem Preßdruck aufweist. Dies wird durch die Kombination der den Rahmen überspannenden, formgebenden Matrizenplatte mit der darunter befindlichen Versteifung erreicht.With the mold according to the invention, a working form is created which, in contrast to known forms, is not massive, as a result of which its weight could be reduced considerably. The shape is designed so that it still has sufficient strength against the pressure in any case. This is achieved by combining the shaping die plate spanning the frame with the stiffening underneath.

Nach einer zweckmäßigen Ausgestaltung der Erfindung wird die Matrizenplatte von einer Edelstahlplatte geringer Dicke gebildet. Der Werkstoff Edelstahl ist exakt formbar, wodurch eine präzise Matrizenoberfläche herstellbar ist, und bietet gute Ablöseeigenschaften. Als Versteifung ist eine an die Unterseite der Matrizenplatte angrenzende Platte aus einem geringwertigeren Metall eingesetzt, die in jedem Fall stark genug ist, um die Preßkraft aufzunehmen.According to an advantageous embodiment of the invention, the die plate is formed by a stainless steel plate of small thickness. The stainless steel material can be shaped precisely, which means that a precise die surface can be produced, and offers good release properties. A stiffener is a plate made of a lower-quality metal, which is adjacent to the underside of the die plate and which is strong enough to support the Record pressing force.

Bei der erfindungsgemäßen Preßform ist der Materialaufwand insgesamt, und insbesondere die Verwendung von teuren Werkstoffen, gegenüber bekannten Preßformen erheblich vermindert, wodurch Kosten und Gewicht der Preßform reduziert sind. Die Standfestigkeit der Edelstahlplatte ist wesentlich höher als beispielsweise die einer Gipsform. Darüberhinaus sind der Rahmen und die untere Versteifung keine Verschleißteile, bleiben also nach Abnutzung der Stahlplatte wiederverwendbar. Wenn eine Matrizenplatte nicht mehr die geforderte Formqualität erzielt, kann diese mit geringem Arbeitsaufwand ausgewechselt werden, ohne daß die gesamte Preßform entfernt werden muß.In the mold according to the invention, the overall material expenditure, and in particular the use of expensive materials, is considerably reduced compared to known molds, as a result of which the cost and weight of the mold are reduced. The stability of the stainless steel plate is much higher than that of a plaster mold, for example. In addition, the frame and the lower stiffening are not wearing parts, so they remain reusable after the steel plate has worn out. If a die plate no longer achieves the required shape quality, it can be replaced with little effort without having to remove the entire mold.

Die Erfindung wird nachfolgend anhand eines bevorzugten Ausführungsbeispiels in der Zeichnung näher erläutert. Dabei zeigt die einzige Figur die Preßform in perspektivischer, schematischer Darstellung mit Querschnitt.The invention is explained in more detail below on the basis of a preferred exemplary embodiment in the drawing. The single figure shows the mold in a perspective, schematic representation with a cross section.

In der Zeichnung ist mit 11 die Preßform, mit 12 ein druckfester Metallrahmen, mit 13 eine Matrizenplatte und mit 14 eine Versteifungsplatte bezeichnet. Der Rahmen 12 ist an einer - nicht gezeigten - Pressentrommel als Rahmen für eine Unterform oder an einem - nicht gezeigten - Pressenstempel als Rahmen für eine Oberform befestigbar. Vorzugsweise besteht der Rahmen 12 aus Aluminium. Die formgebende Matrizenplatte 13 ist lösbar am Rahmen 12 befestigt und überspannt die Rahmenöffnung. Die Matrizenplatte 13 ist eine dünne, gepreßte Edelstahlplatte. An die Unterseite der Matrizenplatte 13 schließt sich formschlüssig die Versteifungsplatte 14 zur Erhöhung der Festigkeit der Preßform an. Die Versteifungsplatte 14 ist vorzugsweise ebenso wie der Rahmen aus Aluminium und in jedem Fall genügend stark, um den Preßdruck vollständig aufzunehmen.In the drawing, 11 is the die, 12 is a pressure-resistant metal frame, 13 is a die plate and 14 is a stiffening plate. The frame 12 can be attached to a press drum (not shown) as a frame for a lower mold or to a press stamp (not shown) as a frame for an upper mold. The frame 12 is preferably made of aluminum. The shaping die plate 13 is releasably attached to the frame 12 and spans the frame opening. The die plate 13 is a thin, pressed stainless steel plate. The stiffening plate 14 connects to the underside of the die plate 13 in a form-fitting manner to increase the strength of the press mold. The stiffening plate 14, like the frame, is preferably made of aluminum and in any case sufficiently strong to fully absorb the pressure.

Zur Erhöhung der Festigkeit der Versteifungsplatte 14 können an deren Unterseite Quer- und/oder Längsrippen ausgebildet sein. Die Versteifung für die Matrizenplatte kann auch insgesamt als Rippengitter ausgeführt sein.To increase the strength of the stiffening plate 14, transverse and / or longitudinal ribs can be formed on the underside thereof. The stiffening for the die plate can also be designed overall as a rib grid.

Es ist möglich, die Versteifungsplatte 14 und die entsprechenden Matrizenplatten 13 so zu gestalten, daß Rahmen 12 und Versteifungsplatte 14 sogar zum Pressen verschiedener Ziegelformen einsetzbar sind, wodurch zusätzlich Kosten und Arbeitsaufwand gesenkt werden.It is possible to design the stiffening plate 14 and the corresponding die plates 13 so that the frame 12 and stiffening plate 14 can even be used for pressing different brick shapes, which additionally reduces costs and labor.

In einer weiteren Ausführungsform der erfindungsgemäßen Preßform ist der Rahmen 12 an seiner Unterseite geschlossen, und der von Rahmen 12 und Matrizenplatte 13 eingeschlossene Raum ist zur weiteren Erhöhung der Stabilität mit einem inkompressiblen Werkstoff, wie Kunstharz oder Gips, ausgegossen.In a further embodiment of the mold according to the invention, the frame 12 is closed on its underside, and the space enclosed by the frame 12 and the die plate 13 is poured out with an incompressible material, such as synthetic resin or plaster, to further increase the stability.

Claims (6)

  1. A mould as the top mould element or bottom mould element of a roof tile press,
       comprising:
       a pressure-resistant frame (12), characterised by:
       a die plate (13) which spans over the frame aperture and which has a shaping surface and whose maximum pressure loading is less than the moulding pressure, and
       a pressure-resistant reinforcing plate (14) which is connected to the frame (12) and which engages the underside of the die plate (13).
  2. A mould according to claim 1, characterised in that the die plate (13) is a plate of NiCr steel and the reinforcement (14) is made of a lower-grade metal.
  3. A mould according to claim 1, characterised in that the reinforcement (14) is in the form of a lattice of metal ribs.
  4. A mould according to claim 1, characterised in that the reinforcement (14) is unitary with the die plate (13) and has stabilizing ribs on its underside.
  5. A mould according to any of claims 1 to 3, characterised in that the frame (12) and/or reinforcement (14) are/is made of aluminium.
  6. A mould according to claim 1, characterised in that the die plate (13) is an NiCr foil having ribs projecting from its underside.
EP92109477A 1991-09-13 1992-06-04 Mould for a roof tile press Expired - Lifetime EP0531629B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4130560 1991-09-13
DE4130560A DE4130560A1 (en) 1991-09-13 1991-09-13 PRESS FORM FOR A ROOF TILE PRESS

Publications (2)

Publication Number Publication Date
EP0531629A1 EP0531629A1 (en) 1993-03-17
EP0531629B1 true EP0531629B1 (en) 1995-09-06

Family

ID=6440575

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92109477A Expired - Lifetime EP0531629B1 (en) 1991-09-13 1992-06-04 Mould for a roof tile press

Country Status (4)

Country Link
EP (1) EP0531629B1 (en)
AT (1) ATE127382T1 (en)
DE (2) DE4130560A1 (en)
ES (1) ES2076615T3 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE950356C (en) * 1951-09-05 1956-10-04 Habil Hans Wahl Dr Ing Core for hollow brick molds
DE1278317B (en) * 1961-04-29 1968-09-19 Irmgard Doris Ludowici Geb Mue Press mold for roof tiles
AT240767B (en) * 1961-09-02 1965-06-10 Irmgard Doris Ludowici Mold with insert for pressing roof tile moldings
DE1584662B1 (en) * 1966-01-24 1970-01-15 Rieter Werke Haendle Pressing tool made of metal for the production of pellets from plastic ceramic masses
DE3133290A1 (en) * 1981-08-22 1983-03-03 Braas & Co Gmbh, 6000 Frankfurt UNDERFORM FOR AN EXTRACTION DEVICE FOR PRODUCING CONCRETE ROOFS
FI82412C (en) * 1988-07-14 1991-03-11 Neste Oy PLASTIC MED METALYTA OCH FOERFARANDE FOER FRAMSTAELLNING AV DENNA.
SE466051B (en) * 1990-01-11 1991-12-09 Swerad Heat Radiating Concrete CASTING FOR THE CASTING OF A HARDWARE MATERIAL

Also Published As

Publication number Publication date
ES2076615T3 (en) 1995-11-01
EP0531629A1 (en) 1993-03-17
ATE127382T1 (en) 1995-09-15
DE59203555D1 (en) 1995-10-12
DE4130560A1 (en) 1993-03-18

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