EP0951979A2 - Procédé et dispositif pour la fabrication d'éléments de construction en béton cellulaire - Google Patents

Procédé et dispositif pour la fabrication d'éléments de construction en béton cellulaire Download PDF

Info

Publication number: EP0951979A2
Authority: EP; European Patent Office
Prior art keywords: water; cleaning; arrangement; aerated concrete; sieve
Prior art date: 1998-04-23
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

EP99107986A

Other languages

German (de)

English (en)

Other versions

EP0951979B1 (fr

EP0951979A3 (fr

Inventor

Franz Xaver Greisel

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.)

GREISEL-BAUSTOFF-GmbH

Greisel-Baustoff GmbH

Original Assignee

GREISEL-BAUSTOFF-GmbH

Greisel-Baustoff 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.)

1998-04-23

Filing date

1999-04-22

Publication date

1999-10-27

1999-04-22 Application filed by GREISEL-BAUSTOFF-GmbH, Greisel-Baustoff GmbH filed Critical GREISEL-BAUSTOFF-GmbH

1999-10-27 Publication of EP0951979A2 publication Critical patent/EP0951979A2/fr

2001-11-07 Publication of EP0951979A3 publication Critical patent/EP0951979A3/fr

2004-02-18 Application granted granted Critical

2004-02-18 Publication of EP0951979B1 publication Critical patent/EP0951979B1/fr

2019-04-22 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

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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
- B28B7/38—Treating surfaces of moulds, cores, or mandrels to prevent sticking
- B28B7/386—Cleaning
- 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
- B28B1/50—Producing shaped prefabricated articles from the material specially adapted for producing articles of expanded material, e.g. cellular concrete

Definitions

the invention relates to a method for producing components from aerated concrete the type mentioned in the preamble of claim 1 and a device to its implementation.
an aqueous is first in a mixer Slurries from the basic materials of the aerated concrete mix with an added one Blowing agent, for example aluminum powder mixed, so that a pourable and drivable aerated concrete mass is created.
Blowing agent for example aluminum powder mixed
a sieve arrangement is introduced into it, and filled the aerated concrete mass so that it through the sieve arrangement flows into the molding box. Then it will be done the onset of the climbing process, the sieve arrangement through the aerated concrete mass pulled through and out of it that practically all Volume parts of the aerated concrete mass remaining in the molding box through the Meshes of the sieve arrangement have flowed.
the main purpose of this approach is air and gas inclusions in the aerated concrete mass from this to filter out because such inclusions especially when they are uneven are distributed to density inhomogeneities and thus a reduction in quality of the finished aerated concrete components.
the mesh size of such known sieve arrangements is in one range between 2 mm and 10 mm, whereby the finer gas inclusions are detected and are filtered out of the aerated concrete mass, the smaller the mesh size is chosen.
this also leads to smoother surfaces of the cut aerated concrete components, which is particularly the case if these are used to establish Walls with unplastered visible surfaces are important is.
the invention has for its object a method of in the preamble of claim 1 mentioned type so that about many filling processes a uniform filtering effect of the sieve arrangement and thus a constant quality of the so produced Aerated concrete components is ensured.
the invention provides that summarized in claim 1 Characteristics before.
This measure according to the invention is based on the knowledge that it is entirely possible to arrange the screen at least after a few filling processes, but preferably to be cleaned with water after each filling process, that there are no deposits of the aerated concrete mass on or in the Form sieve arrangement, which lead to a closing of the sieve mesh could.
the immersed sieve arrangement can be cleaned with ultrasound, which has the particular advantage that not in the water or lumps of lime and cement that are not sufficiently quickly soluble are crushed as far be rinsed out of the sieve even with small mesh sizes can be.
a method is particularly preferred in which the sieve arrangement not only immersed in a pool of water but also sprayed out. It has proven to be particularly favorable if the direction of the or the water jets used for this from the outside in, i.e. so runs towards the inside of the sieve arrangement. First of all, this is surprising because this means in particular on the inside of the screen arrangement side walls adhering deposits are flushed into the sieve. On the other hand but this also increases the amount of water caused by the Sieve mesh flows through. This measure can also Concentrate the drainage of the cleaning water towards the cleaning basin, see above that pollution of the immediate vicinity of the cleaning system is avoided and the water used to eject the sieve arrangement in the Cleaning basin is collected.
the water used to spray the screen assembly is preferred removed from the cleaning basin so that a cycle is created.
the degree of contamination in the cleaning basin takes Water from cleaning process to cleaning process.
this degree of contamination is monitored and if it exceeds a predefinable limit, pumped out at least part of the water in the cleaning basin and replaced with fresh water.
the lower part of a mixer is shown schematically 1, in which the for the production of components AAC prepared slurries in portions with a blowing agent, for example Aluminum powder added and to produce a pouring and climatic aerated concrete is mixed well.
a blowing agent for example Aluminum powder added and to produce a pouring and climatic aerated concrete is mixed well.
the telescopic and hydraulically raised and lowered Mixer outlet 3 raised and the connection between mixer 1 and the mixer outlet 3 is interrupted by a closed locking device 4.
the mold 5 has a carriage 6 (see FIG. 2) with which it runs on rails 8, which are embedded in the hall floor.
the sliding platform 11 is located itself at such a height that its top with the hall floor is aligned and a mold 5 from a recessed in the hall floor Rail pair 8 on the rail pair 12 of the transfer platform 11 or in reverse Direction can be driven when the transfer table 11 is positioned is that the rails in question are aligned.
a strainer basket 14 is suspended from four steel cables 15 so that it moves in the direction of the double arrow V (see Fig. 2) up and down can be.
the strainer basket 14 has an as Sieve-shaped bottom surface, the dimensions of which are slightly smaller, than the upward opening of the mold, so that the strainer basket 14 before filling the aerated concrete mass into the casting mold 5 conveniently on the latter Floor can be lowered.
the bottom one will too Part of the telescopic and vertically movable mixer spout 3 lowered.
the shut-off device 4 is opened so that the pourable and rising aerated concrete mass in the mixer 1 into the Mold 5 can shrink.
the screen basket 14 also has vertical side walls, formed as sieves, which change when it is lowered and lifting a short distance parallel to the inner walls of the Move mold 5.
the height of these side walls is such that the entire aerated concrete mass after filling into the casting mold 5 initially is in the strainer basket 14 and not over the upper edges of the strainer basket side walls can flow when the basket 14 up through the Aerated concrete mass is pulled through and out of it to in the aerated concrete mass expel contained gas bubbles, which otherwise lead to inhomogeneities could lead.
vibrators 17 vibrated on its top are mounted.
the lower part also becomes the telescopic mixer spout 3 raised.
strainer basket 14 After being pulled out of the aerated concrete mass 1 and 2 drawn position above the upper edge of the Has reached mold 5, the latter from the sliding platform 11 down moved the hall floor, for example, into the position shown in FIG. 2 become. If the sliding platform is then moved to the side in the direction of arrow F, so it releases the cleaning basin 20 shown in FIG is located exactly below the position of the strainer basket 14 and is so large is that by a simple lowering movement at least over the entire Height of the screen basket side walls in the cleaning basin filled with water 20 can be immersed.
a pump sump 25 is provided on the bottom of the cleaning basin 20, via the water from the cleaning basin 20 through a discharge line 26 can be removed. As long as the degree of pollution of this water does not exceed a predefinable limit value, this will be via the pump sump 25 and the discharge line 26 water removed from the water jet nozzles 22 fed via the feed line 23. Reaches the degree of pollution the limit value mentioned, this will be via the pump sump withdrawn water is not returned but as part of the aerated concrete manufacturing process otherwise, for example as rinse water for the Cutting trench, for wet grinding of the sand or as an aggregate component used for the aerated concrete mix.
the cleaning process takes place in such a way that the screen basket 14 is essential faster than when lowering into the mold in the cleaning basin is immersed that the entire screen basket bottom and at least a substantial one Part of the vertical screen basket walls from the water located there be covered. Then the sieve arrangement is moved up and down several times and at the same time with the help of the water jet nozzles 22 from the outside inwards sprayed out. The coarsest deposits on the sieve mesh and also removed from the strainer frame. If the strainer basket 14 in the If the cleaning basin is immersed, it can also be treated with ultrasound , which may result in lime and cement lumps in the sieve basket destroyed or crushed to the extent that they pass through the mesh of the strainer can be rinsed out. If the strainer basket 14 is then finally pulled out of the cleaning basin 20, with With the help of the water jet nozzles 22 again rinsed vigorously. After that the Shake the screen assembly briefly so that no water drops remain on it, that could interfere with the next casting process.
the described method offers the advantages that a clean sieve arrangement is available for each batch of the aerated concrete mass that is to be filled into a molding box, which can serve its purpose of filtering out gas bubbles from the filled aerated concrete mass, even with very small mesh sizes , for example in the range of 2 to 4 mm. While the next aerated concrete mixture is being created in the mixer and a casting mold is being closed, the cleaning process takes place, which in any case does not take longer than 1 minute.
the circulation principle described for the cleaning water is very economical. Can also as Fresh water "for the cleaning basin, water from the mold cooling or condensed water from the autoclave can be used, which has an improved cleaning effect due to its heat.

Landscapes

Engineering & Computer Science (AREA)
Manufacturing & Machinery (AREA)
Chemical & Material Sciences (AREA)
Ceramic Engineering (AREA)
Mechanical Engineering (AREA)
Cleaning By Liquid Or Steam (AREA)
On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
Producing Shaped Articles From Materials (AREA)

EP99107986A 1998-04-23 1999-04-22 Procédé et dispositif pour la fabrication d'éléments de construction en béton cellulaire Expired - Lifetime EP0951979B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE19818282A DE19818282C2 (de)	1998-04-23	1998-04-23	Verfahren und Vorrichtung zur Herstellung von Bauelementen aus Porenbeton
DE19818282		1998-04-23

Publications (3)

Publication Number	Publication Date
EP0951979A2 true EP0951979A2 (fr)	1999-10-27
EP0951979A3 EP0951979A3 (fr)	2001-11-07
EP0951979B1 EP0951979B1 (fr)	2004-02-18

Family

ID=7865637

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP99107986A Expired - Lifetime EP0951979B1 (fr)	1998-04-23	1999-04-22	Procédé et dispositif pour la fabrication d'éléments de construction en béton cellulaire

Country Status (3)

Country	Link
EP (1)	EP0951979B1 (fr)
AT (1)	ATE259699T1 (fr)
DE (2)	DE19818282C2 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB1550332A (en) *	1976-08-24	1979-08-15	Dent & Hellyer	Apparatus for use in washing articles
DE4412972C2 (de) *	1994-04-14	2000-05-04	Greisel Baustoff Gmbh	Verfahren und Einrichtung zur Herstellung von Körpern aus Gasbeton oder dergleichen
GB2292098B (en) *	1994-08-12	1998-04-29	Kevin Miller	Cleaning of filters
DE19541309C1 (de) *	1995-11-06	1996-11-21	Siegmund G Ederer	Gießrohranordnung

1998
- 1998-04-23 DE DE19818282A patent/DE19818282C2/de not_active Expired - Fee Related
1999
- 1999-04-22 EP EP99107986A patent/EP0951979B1/fr not_active Expired - Lifetime
- 1999-04-22 AT AT99107986T patent/ATE259699T1/de active
- 1999-04-22 DE DE59908547T patent/DE59908547D1/de not_active Expired - Lifetime

Also Published As

Publication number	Publication date
EP0951979B1 (fr)	2004-02-18
DE59908547D1 (de)	2004-03-25
EP0951979A3 (fr)	2001-11-07
DE19818282C2 (de)	2002-07-18
DE19818282A1 (de)	1999-11-04
ATE259699T1 (de)	2004-03-15

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