DE2638871A1 - Sand-lime brick moulding plant - sprays forming tool with water or oil at high pressure before introducing charge in mould - Google Patents

Sand-lime brick moulding plant - sprays forming tool with water or oil at high pressure before introducing charge in mould

Info

Publication number
DE2638871A1
DE2638871A1 DE19762638871 DE2638871A DE2638871A1 DE 2638871 A1 DE2638871 A1 DE 2638871A1 DE 19762638871 DE19762638871 DE 19762638871 DE 2638871 A DE2638871 A DE 2638871A DE 2638871 A1 DE2638871 A1 DE 2638871A1
Authority
DE
Germany
Prior art keywords
sand
oil
water
mould
high 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.)
Withdrawn
Application number
DE19762638871
Other languages
German (de)
Inventor
Heinrich Graucob
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19762638871 priority Critical patent/DE2638871A1/en
Publication of DE2638871A1 publication Critical patent/DE2638871A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00Moulds; Cores; Mandrels
    • B28B7/38Treating surfaces of moulds, cores, or mandrels to prevent sticking
    • B28B7/388Treating surfaces of moulds, cores, or mandrels to prevent sticking with liquid material, e.g. lubricating

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  • 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

The installation for making sand-line bricks, in which the wet mass is compressed in moulds, by a forming tool. It applies a liquid, such as water, or oil, to the moulding tool after the moulded shape has been ejected from the mould, and before the next charge is introduced into the mould. The liquid is sprayed onto the tool for about half a second, at high pressure, which may by equal to about 50 atmospheres. If oil spray is used, instead of water, the oil may be that used for moulding or shaping, and may be diluted with water.

Description

" Verfahren zum Herstellen von Kalksandsteinen lt"Process for the production of sand-lime bricks according to

Die Erfindung bezieht sich auf ein Verfahren zum Herstellen von Kalksandsteinen durch Pressen einer feuchten Mischung von Kalk und Sand. Diese Mischung wird in Pressen verformt, die in der Minute bis zu zehn Formlingen ausstoßen. Die Formen dieser Kalksandsteinpressen haben Innenteile aus hochlegierten Stählen, die einem starken Verschleiß ausgesetzt sind, weil der Hauptanteil der verwendeten Preßmasse Sand ist, der wie Schmirgel an den Formen wirkt. In diesen Formen befinden sich zur Herstellung von Hohlsteinen Dorne, die ebenfalls einem starken Verschleiß unterworfen sind. Aus Gründen der Wärmedämmung werden immer leichtere Steine gefordert, so daß diese Dorne immer größer werden und der Kalksandstein einen immer höheren Lochanteil hat. Hierdurch bedingt wird auch der erforderliche Ausstoßdruck immer höher, mit dem die Formlinge aus den Formzeugen der Presse gestoßen werden, da die Berührungsfläche zwischen der Kalksandmasse und dem Formzeug immer größer wird.The invention relates to a method for producing sand-lime bricks by pressing a damp mixture of lime and sand. This mixture is in Presses are deformed, which eject up to ten bricks per minute. The forms These sand-lime block presses have internal parts made of high-alloy steels that give you a are exposed to severe wear, because the majority of the molding compound used Is sand that works like emery on the shapes. In these forms there are for the production of hollow stones mandrels, which are also subject to heavy wear are. For reasons of thermal insulation ever lighter stones are required, so that these thorns get bigger and bigger and the sand-lime brick has an ever higher percentage of holes Has. As a result, the required ejection pressure is also getting higher and higher which the briquettes are pushed out of the molds of the press, as the contact surface between the sand-lime mass and the mold becomes larger and larger.

Die Haftreibungskräfte der Kalksandmasse werden so stark, daß für das Ausstoßen der Formlinge verwendete Maschinenteile sich verformen, um dann ruckartig in die alte Lage zurückzugehen. Hierdurch entsteht ein ruckartiger Ausstoß der Formlinge, der in ihnen Risse hervorruft oder sie ganz zerstört. Beobachtungen haben gezeigt, daß die Ausstoßkräfte nachlassen, je größer die Feuchtigkeit der in der Presse verformten Kalksandsteinmasse ist. Man kann jedoch eine bestimmte Feuchtigkeits- grenze in der Größenordnung von etwa 3 bis 6% je nach verwendetem Sand nicht überschreiten, da sonst Füllschwierigkeiten auftreten oder die Formlinge bei dem unter Sattdampfdruck durchgeführten Härteprozeß zerfallen, bei dem Kalziumhydrosilikat~gebildet wird.The static friction forces of the sand-lime mass are so strong that for the ejection of the moldings used machine parts to deform, to then jerky to go back to the old position. This creates a jerky ejection of the moldings, which causes cracks in them or completely destroys them. Observations have shown that the ejection forces decrease, the greater the humidity of the deformed in the press Sand-lime brick mass is. However, a certain moisture content can be border do not exceed in the order of about 3 to 6% depending on the sand used, otherwise filling difficulties occur or the briquettes under saturated steam pressure the hardening process carried out, during which calcium hydrosilicate ~ is formed.

Der Erfindung liegt die Aufgabe zugrunde, die zum Ausstoßen der Formlinge aus der Presse erforderlichen Kräfte zu verringern und ein Ausstoßen der Formlinge ohne jede Gefahr einer Rißbildung zu ermöglichen.The invention is based on the object of ejecting the moldings To reduce the forces required from the press and to eject the moldings without allowing any risk of cracking.

Gemäß der Erfindung wird auf das Formzeug der Kalksandsteinpresse nach dem Ausstoßen des Formlings und vor der Neufüllung mit der Preßmasse eine Flüssigkeit aufgebracht. Diese Flüssigkeit wird vorzugsweise kurzzeitig während etwa einer halben Sekunde mit hohem Druck in der Größenordnung von etwa 50 atü auf das Formzeug gesprüht. Hierdurch erhalten die Flüssigkeitsteilchen eine so hohe Beschleunigung, daß sie auch während des Formweges das Formzeug noch erreichen.According to the invention, the mold of the sand-lime block press is applied a liquid after the molding has been ejected and before it is refilled with the molding compound upset. This liquid is preferably briefly during about half a Second at high pressure in the order of about 50 atmospheres sprayed onto the mold. This gives the liquid particles such a high acceleration that they still reach the mold during the mold path.

Zum Einsprühen kann zweckmäßig reines Wasser oder Form- bzw.For spraying, it is advisable to use pure water or molding or

Schalungsöl verwendet werden.Formwork oil can be used.

Claims (5)

PATENTANSPRÜCHE Verfahren zum Herstellen von Kalksandsteinen durch Pressen einer feuchten Mischung von Kalk und Sand in Formen, dadurch gekennzeichnet, daß auf das Formzeug der Kalksandsteinpresse nach dem Ausstoßen der Formlinge und vor der Neufüllung mit der Pressmasse eine Flüssigkeit aufgebracht wird. PATENT CLAIMS Process for the production of sand-lime bricks by Pressing a moist mixture of lime and sand into molds, characterized that on the mold of the sand-lime block press after ejecting the bricks and a liquid is applied before refilling with the molding compound. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Flüssigkeit kurzzeitig während etwa einer halben Sekunde mit hohem Druck in der Größenordnung von etwa 50 atü auf das Formzeug gesprüht wird. 2. The method according to claim 1, characterized in that the liquid briefly for about half a second with high pressure of the order of magnitude is sprayed from about 50 atmospheres onto the mold. 3o Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß auf das Formzeug Wasser gesprüht wird. 3o method according to claim 1, characterized in that on the Mold water is sprayed. 4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß auf das Formzeug Ö1, insbesondere Schalungs- oder Formöl gesprüht wird. 4. The method according to claim 1, characterized in that on the Mold oil, in particular formwork or mold oil, is sprayed. 5. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß auf das Formzeug verdünntes Ö1, insbesondere verdünntes Schalungs- oder Formöl gesprüht wird. 5. The method according to claim 1, characterized in that on the Molding diluted oil, in particular diluted formwork or molding oil, sprayed will.
DE19762638871 1976-08-28 1976-08-28 Sand-lime brick moulding plant - sprays forming tool with water or oil at high pressure before introducing charge in mould Withdrawn DE2638871A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19762638871 DE2638871A1 (en) 1976-08-28 1976-08-28 Sand-lime brick moulding plant - sprays forming tool with water or oil at high pressure before introducing charge in mould

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762638871 DE2638871A1 (en) 1976-08-28 1976-08-28 Sand-lime brick moulding plant - sprays forming tool with water or oil at high pressure before introducing charge in mould

Publications (1)

Publication Number Publication Date
DE2638871A1 true DE2638871A1 (en) 1978-03-02

Family

ID=5986621

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19762638871 Withdrawn DE2638871A1 (en) 1976-08-28 1976-08-28 Sand-lime brick moulding plant - sprays forming tool with water or oil at high pressure before introducing charge in mould

Country Status (1)

Country Link
DE (1) DE2638871A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2521535A1 (en) * 1982-02-12 1983-08-19 Ceric Method of handling soft or adherent products - uses surface of liq. jelly maintained at temp. near its melting point

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2521535A1 (en) * 1982-02-12 1983-08-19 Ceric Method of handling soft or adherent products - uses surface of liq. jelly maintained at temp. near its melting point

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