EP0767034A1 - Moule pour la fabrication d'éléments en béton - Google Patents

Moule pour la fabrication d'éléments en béton Download PDF

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Publication number
EP0767034A1
EP0767034A1 EP96115989A EP96115989A EP0767034A1 EP 0767034 A1 EP0767034 A1 EP 0767034A1 EP 96115989 A EP96115989 A EP 96115989A EP 96115989 A EP96115989 A EP 96115989A EP 0767034 A1 EP0767034 A1 EP 0767034A1
Authority
EP
European Patent Office
Prior art keywords
plate
pressure
mold
stamp
concrete
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
EP96115989A
Other languages
German (de)
English (en)
Other versions
EP0767034B1 (fr
Inventor
Herbert Hess
Gottfried Keller
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.)
Rampf Formen GmbH
Original Assignee
Rampf Formen 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
Priority claimed from DE19537077A external-priority patent/DE19537077A1/de
Application filed by Rampf Formen GmbH filed Critical Rampf Formen GmbH
Publication of EP0767034A1 publication Critical patent/EP0767034A1/fr
Application granted granted Critical
Publication of EP0767034B1 publication Critical patent/EP0767034B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/06—Platens or press rams
    • B30B15/065—Press rams
    • B30B15/067—Press rams with means for equalizing the pressure exerted by a plurality of press rams
    • 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
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
    • 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
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
    • B28B3/10—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form each charge of material being compressed against previously formed body

Definitions

  • the invention relates to a mold for the mechanical production of molded concrete parts with a lower mold part with at least one mold chamber and an upper mold part with a load plate and as many stamps as there are mold chambers.
  • the lower mold parts of such molds are filled in the production machine using a so-called filling truck.
  • This is a flat funnel that contains the molding material and is moved back and forth directly over the upper edges of the molding chambers. The material falls into the chambers and is stripped flush on the way back from the edge of the filling car.
  • the distribution of the pourable concrete mass in the filling truck is mostly different and depending on the position of the individual chambers within the mold or depending on the size of the mold chamber base area, there are necessarily different travel times that are available for the sinking of the molding material into the chambers. The uniform filling of the mold chambers is therefore problematic.
  • the invention has for its object to provide a shape with which it is possible with unchanged filling technology to produce concrete bodies with a highly uniform density, uniform height and uniform surface structure.
  • the focus is on concrete paving stones, for which multi-chamber molds are used, and on the other hand, large-volume concrete blocks and, above all, large and relatively thin slabs, which are produced in single or double molds.
  • the basic idea is to carry out a two-stage compression process in such a way that first compression is carried out with resilient stamps (under air pressure) and after refilling the chamber cavities of different depths with stamps located at the same height and parallel to the mold table or a stamp lying parallel is densified.
  • the parallelism to the forming table comes about as soon as the air pressure has been reduced to such an extent that the pressure plate of the stamp comes to rest against the stops while overcoming the force of a pressure medium chamber with a movable wall.
  • the setting of the reduced air pressure is very important.
  • the air pressure be further reduced during the post-compression phase in order to fully utilize the impact effect described below.
  • the lowering can take place continuously.
  • the air pressure can reach the value 0 before the end of the compression process or at the end.
  • the compression is particularly favored by an important impact effect occurring here. It is in fact possible, through sensitive adjustment of the air pressure, to ensure that the pressure plates do not simply lie against their stops, but dance on them, that is to say they always bounce off. This enables large concrete slabs of e.g. B. 70 x 90 cm and larger with a crack-free, perfectly even smooth surface, which was previously not possible especially with relatively thin plates was. Another great advantage of the vibrability of the pressure plates of the stamps or the resulting impact is that the concrete plates do not "stick" to the pressure plates, but are easily detached from them.
  • a pressure medium chamber with a movable wall which is acted upon by a common compressed air source and is effective on the relevant lower stamp part.
  • This e.g. B. membrane or bellows
  • the individual pressure medium chambers it is also possible to arrange the individual pressure medium chambers approximately at the level of the common load plate and to transmit their pressure forces to the pressure plates via a movable stamp shaft or via special plungers, in which case the plungers penetrate the tubular stamp shafts.
  • a preferred development of the invention is based on the fact that the pressure medium chamber is arranged at the bottom of the stamp in the vicinity of the movable pressure plate. It is proposed that an insert is arranged on each stamp between a base plate which is fixedly connected to the stamp shaft and the pressure plate and has an upper part with an upper plate and a lower part with a lower plate which is vertically movable relative to the latter, the upper plate with the Base plate and the lower plate is screwed to the pressure plate.
  • the insert also contains at least one bellows to which compressed air can be applied and the stops for limiting the stroke range of the two parts of the insert.
  • Such an application has the advantage that loads with pressure plates that have previously been firmly screwed to the stamping foot plates can be converted quickly and easily, so that the pressure plates can be moved and controlled in terms of their vibration behavior in the sense of the invention. If the dimensions are appropriate, the screw holes in the stamp foot plates and the pressure plates can be used for retrofitting.
  • intermeshing guide pins and sleeves are arranged on them.
  • Spacers which can also be designed as strips, are attached to one of the two plates of the insert as stops to limit the upward stroke of the pressure plates.
  • stops to limit the stroke of the pressure plates down be attached to one of the plates of the insert double-T-shaped stop pieces which engage in double-T-shaped recesses of spacers attached to the other plate.
  • a bolt fastened to the lower plate of the insert passes through the other plate and has a widened head above the plate and a support shoulder below this plate.
  • the representation according to FIG. 1 has to be imagined as a section of a molded upper part, the load plate 1 carrying several punches being included.
  • the stamp shown is guided so that it can move in height, the stroke in the example being about 10 mm.
  • the stamp consists of a stamp shaft 2 made of square tube, a head plate 3, a base plate 4 and a pressure plate 5 screwed to it, the edge formation of which with a downward-facing cutting edge is the bevel to be finished with this shape Concrete paving stone forms.
  • the head plate 3 of the stamp is guided in a membrane receiving part 6, which is screwed together with a retaining ring 7 by means of screws 8 to the load plate 1.
  • a membrane 12 is placed from below on a central, thin plate section of the membrane receiving part 6 and tightly clamped between this section and a fastening ring 13. The latter is screwed on with screws 14.
  • the membrane 12 can rest against the head plate 3 and press it down against the force of the compression springs 11 as far as it will go if compressed air into the through the membrane 12 through a line 15 which is connected by means of a screw connection 16 passing through the membrane receiving part 6 completed interior penetrates.
  • the line 15 is connected to a distributor 17, which in turn is connected via a three-way valve 18 to a compressed air supply line 19 of the stone making machine in question.
  • pre-piercing After this first filling process is compressed (so-called "pre-piercing").
  • the stamps are under air pressure and are in the lower position against the force of the springs 11.
  • the concrete masses in the mold chambers are compacted, whereby due to the resilience of the punches, the surface of the compacted concrete masses in those molds that were more filled is higher than the less filled chambers.
  • the three-way valve 18 could of course be supplemented with one or two pressure reducing valves that it allow to set appropriately different pressures for the different compression phases.
  • stiffening rails 20 are shown attached to a load plate 1 '.
  • the punch shaft 2 ' is welded firmly to the load plate 1' and carries a thin base plate 4 'below.
  • a membrane receiving part 6 ' is screwed onto this base plate 4' with the aid of screws 21, the screws also holding the fastening ring of the membrane 12 at the same time.
  • the pressure plate 5 ' is suspended on spring screws 10 here.
  • the membrane 13 lies directly against it.
  • a sealing ring 22 bridging the stroke of the pressure plate 5 'prevents the penetration of concrete sludge into the space between the pressure plate and the membrane receiving part.
  • the individual pressure chambers are connected via lines 15 'to a distributor piece 17', the internal pressure of which can be controlled as in the first example.
  • the insert 23 comprises two mutually movable assemblies, which are characterized by an upper plate 24 and a lower plate 25.
  • a guide sleeve 26 is fastened to the upper plate 24 under each punch shaft 2 ′′ and cooperates with a guide pin 27 on the lower plate.
  • On the lower plate 25, four spacer strips 28 to 31 joined together are also attached.
  • 3 shows a longitudinal bar 28 and 5 shows a transverse bar 30 in individual representation.
  • the longitudinal bars each have two double-T-shaped recesses 32 which interact with double-T-shaped stop pieces 33. The latter are firmly connected to the upper plate 24 with two screws 34 each.
  • bolts 35 are provided, which have several functions. Since they penetrate all of the plates and the spacer strips in the vertical direction, they initially act alongside the guide sleeves 26 and guide bolts 27 as guide members. Then they connect the pressure plate 5 ′′ to the lower plate 25. They are screwed into the pressure plate 5 ′′ and a nut 36 clamps the two lower plates together. In order to make room for the nuts 36, the spacer strips 28 to 31 have rectangular edge recesses 38 under their bores 37 for the screw bolts 35. And finally, the screw bolts 35 serve to hold compression springs 39, which cushion the lower assembly of the insert 23 as it moves downward. The compression springs 39 are clamped with washers between the base plate 4 ′′ and the respective head of the screw bolts 35.
  • the insert In order to exert a pneumatic pressure force on the lower part of the insert 23 and the pressure plate 5 ′′ attached to it, the insert contains a bellows 40 made of rubber or the like, which is screwed onto the lower plate 25 and the upper plate 24 by means of two connecting plates 41.
  • the connection screw connection of the bellows protrudes through corresponding cutouts in the upper plate 24 and the foot plate 4 ′′.
  • the indicated compressed air hose 42 for the bellows is guided upwards between the punch shafts 2 ′′.
  • the upper plate 24 is connected to the foot plate 4 ′′ by short screws 43. In total, as shown in FIG. 4, eight such screws 43 are provided. In part, the screw holes existing before retrofitting with the insert 23 can also be used.
  • the mode of operation corresponds to that of the exemplary embodiments described above. If slack bellows 40 is not acted on, the spacer strips 28 to 31 rest against the upper plate 24 as a result of the spring action. 3 shows the position when the bellows 40 is pressurized. Its force overcomes the restoring forces of the springs 39, but the downward movement is limited by the double-T-shaped stop pieces 33, which come into contact with the projections formed by the recesses 32.
  • the inserts 23 can be prefabricated separately in the required dimensions for stamps of any shape and size, which leads to a considerably more favorable workflow in production. If necessary, the pressure plates 5 '', e.g. B. when worn, just as easily as before.
  • FIG. 6 The embodiment of Figure 6 is intended to indicate how a larger printing plate can be attached to a stamp in the sense of the invention.
  • Combined two-way stops 45 and, on the other hand, spacers 46 are used, which can be arranged in a suitable manner over the surface of the pressure plate 47 in question.
  • the bellows 40 corresponds to that according to FIG. 3.
  • the pressure plate 47 is fastened to the lower plate 25 'of the insert 23 ' shown by means of screws 48.
  • the two-way stop 45 shown comprises a bolt which has a lower section 49 of larger diameter and includes an upper portion 50 of smaller diameter.
  • a shoulder 51 is thereby formed.
  • Section 29 is welded to lower plate 25 ' .
  • the upper section 50 passes through the upper plate 24 'and allows displacement therein.
  • a screw 52 is inserted through the bolt and screwed to the lower plate 25 ' .
  • Under the head of this screw is a stop washer 53 which limits the downward movement of the lower part of the insert.
  • the shoulder 51 forms an upward stop.
  • the possible stroke in this example is 12 mm.
  • further pressure pieces 46 which are designed as strips or blocks, are welded to the lower plate 25 ' in the example by hole welding at exactly the same height. Since the mentioned impact occurs between these stops and the upper plate 24 ' , a sufficiently large total impact area must be provided.
  • the number and distribution of the two-way stops and the pressure pieces over the stamp surface depends on their format and size.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
EP96115989A 1995-10-05 1996-10-05 Moule pour la fabrication d'éléments en béton Expired - Lifetime EP0767034B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19537077A DE19537077A1 (de) 1995-10-05 1995-10-05 Mehrkammerform und Verfahren zur maschinellen Herstellung von Betonformteilen
DE19537077 1995-10-05
DE29603783U DE29603783U1 (de) 1995-10-05 1996-03-01 Mehrkammerform zur maschinellen Herstellung von Betonformteilen
DE29603783U 1996-03-01

Publications (2)

Publication Number Publication Date
EP0767034A1 true EP0767034A1 (fr) 1997-04-09
EP0767034B1 EP0767034B1 (fr) 2004-04-21

Family

ID=26019250

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96115989A Expired - Lifetime EP0767034B1 (fr) 1995-10-05 1996-10-05 Moule pour la fabrication d'éléments en béton

Country Status (4)

Country Link
US (1) US6093012A (fr)
EP (1) EP0767034B1 (fr)
AT (1) ATE264734T1 (fr)
DK (1) DK0767034T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10330924A1 (de) * 2003-07-08 2005-02-10 Rampf Formen Gmbh Formwerkzeug zur Herstellung von Formsteinen

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6793476B2 (en) * 2001-12-05 2004-09-21 General Shale Products Llc Apparatus for providing aging effect for brick
US20040218985A1 (en) * 2003-04-30 2004-11-04 Klettenberg Charles N. Method of making a composite masonry block
US20070193181A1 (en) * 2006-01-30 2007-08-23 Klettenberg Charles N Dry-cast concrete block
US7695268B2 (en) * 2007-04-19 2010-04-13 Marshall Concrete System and method for manufacturing concrete blocks
DE112011101348A5 (de) * 2010-04-16 2013-02-07 Kobra Formen Gmbh Vorrichtung und Verfahren zur Herstellung von Betonformsteinen sowie Form hierfür
ITMI20121558A1 (it) * 2012-09-19 2014-03-20 Martinelli Ettore Srl Stampo per la formatura di piastrelle e simili
ITRE20130018A1 (it) * 2013-03-13 2014-09-14 Ferrari Carlo Societa Per Azioni Off Stampo isostatico perfezionato

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3222748A (en) * 1962-10-12 1965-12-14 Crossley Machine Company Inc Tile press mechanism
FR2152058A5 (fr) * 1971-09-02 1973-04-20 Walchhutter Ulrico
US4395213A (en) * 1976-08-12 1983-07-26 Besser Company Noise suppressing block molding machinery
EP0211449A1 (fr) * 1985-04-10 1987-02-25 MASS S.p.A. Presse spécialement adaptée au moulage des tuiles
WO1988006084A1 (fr) * 1987-02-23 1988-08-25 Kvm Industrimaskiner A/S Procede et dispositif servant a couler sous pression des produits en beton tels que des blocs de pierre dans un moule cellulaire
WO1991005111A1 (fr) * 1989-10-06 1991-04-18 Sf-Vollverbundstein-Kooperation Gmbh Piece moulee en beton forme de plaque et procede et dispositif de fabrication

Family Cites Families (9)

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US3833333A (en) * 1972-11-06 1974-09-03 G Britten Press construction
DE2406688A1 (de) * 1974-02-13 1975-08-14 Oldenburger Betonsteinwerke Vorrichtung zum verdichten von formfuellungen, insbesondere betonfuellungen fuer betonsteinformen
DE8307078U1 (de) * 1983-03-11 1984-03-22 Rampf Formen GmbH, 7936 Allmendingen Vorrichtung zur herstellung von formlingen aus beton oder dergleichen
JPS6044200A (ja) * 1983-08-22 1985-03-09 Kootaki Kk プレス装置
DE3339487A1 (de) * 1983-10-31 1985-05-15 Bühler, Eugen, Dipl.-Ing., 8877 Burtenbach Verfahren zur herstellung eines trockengepressten formlings aus trockener, rieselfaehiger formmasse, insbesondere keramischer formmasse
US4614488A (en) * 1985-07-02 1986-09-30 Venturetech Enterprises, Inc. Overlay molding press
US4753160A (en) * 1987-11-20 1988-06-28 Motorola Inc. Mold press force equalizer
DE4407127A1 (de) * 1994-03-04 1995-09-07 Rampf Formen Gmbh Vorrichtung zur Herstellung von Formkörpern aus insbesondere Beton
IT1269352B (it) * 1994-07-27 1997-03-26 Fabio Casolari Piano flottante per tamponi di presse

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3222748A (en) * 1962-10-12 1965-12-14 Crossley Machine Company Inc Tile press mechanism
FR2152058A5 (fr) * 1971-09-02 1973-04-20 Walchhutter Ulrico
US4395213A (en) * 1976-08-12 1983-07-26 Besser Company Noise suppressing block molding machinery
EP0211449A1 (fr) * 1985-04-10 1987-02-25 MASS S.p.A. Presse spécialement adaptée au moulage des tuiles
WO1988006084A1 (fr) * 1987-02-23 1988-08-25 Kvm Industrimaskiner A/S Procede et dispositif servant a couler sous pression des produits en beton tels que des blocs de pierre dans un moule cellulaire
WO1991005111A1 (fr) * 1989-10-06 1991-04-18 Sf-Vollverbundstein-Kooperation Gmbh Piece moulee en beton forme de plaque et procede et dispositif de fabrication

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10330924A1 (de) * 2003-07-08 2005-02-10 Rampf Formen Gmbh Formwerkzeug zur Herstellung von Formsteinen

Also Published As

Publication number Publication date
US6093012A (en) 2000-07-25
ATE264734T1 (de) 2004-05-15
EP0767034B1 (fr) 2004-04-21
DK0767034T3 (da) 2004-07-12

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