EP0629477B1 - Filtervorrichtung - Google Patents

Filtervorrichtung Download PDF

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Publication number
EP0629477B1
EP0629477B1 EP94109038A EP94109038A EP0629477B1 EP 0629477 B1 EP0629477 B1 EP 0629477B1 EP 94109038 A EP94109038 A EP 94109038A EP 94109038 A EP94109038 A EP 94109038A EP 0629477 B1 EP0629477 B1 EP 0629477B1
Authority
EP
European Patent Office
Prior art keywords
frame
filter arrangement
mould
filter
filter cloth
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
EP94109038A
Other languages
English (en)
French (fr)
Other versions
EP0629477A1 (de
Inventor
Roine Bonnevier
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.)
MACHINATOR AB
Original Assignee
MACHINATOR AB
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 MACHINATOR AB filed Critical MACHINATOR AB
Publication of EP0629477A1 publication Critical patent/EP0629477A1/de
Application granted granted Critical
Publication of EP0629477B1 publication Critical patent/EP0629477B1/de
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
    • 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
    • B28B3/04—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 with one ram per mould
    • B28B3/06—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 with one ram per mould with two or more ram and mould sets
    • 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
    • B28B7/40—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material
    • B28B7/46—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material for humidifying or dehumidifying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/04—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using press rams

Definitions

  • the present invention relates to a filter arrangement for a machine for manufacturing concrete slabs, said machine comprising a plurality of horizontal mould frames; lower and upper horizontal press plates arranged to cooperate with the mould frames to form closed mould cavities for concrete compound that contains a surplus of water; and channel systems connecting the mould cavities to a vacuum source for evacuation of said excess water liberated during a pressing step, and said filter arrangement including a filter cloth of a plastic material for abutment against the side of the press plate facing the mould cavity.
  • a filter cloth of synthetic material is placed on the lower press plate and clamped in place using separate attachment devices.
  • a sheet of paper is then placed on top of the batch of wet concrete compound as in the method described first, but in this case with the aid of a robot.
  • This technique thus eliminates the initial manual work but the manual work of removing the paper sheet from one side of the concrete slab must still be performed. Furthermore, fitting the filter cloth is time-consuming and complicated.
  • a filter cloth of synthetic material being placed on the lower press plate and being clamped in place is for instance known from DE-B-2 547 542.
  • the object of the present invention is to provide an improved filter arrangement that eliminates several of the drawbacks mentioned above and greatly reduces the others.
  • the filter arrangement according to the invention is characterized in that it also includes a frame of a flexible plastic material surrounding the filter cloth and forming an indivisible unit with the filter cloth, and that the frame has a lateral portion for sealing cooperation with vertical inner sides of the mould frame as well as a rear portion forming an attachment means for cooperation with an attachment means of the press plate for detachable attachment of the filter arrangement to the press plate.
  • Figure 1 shows schematically and partially in section the press section of a machine for moulding concrete slabs.
  • Figure 2 is a view of the press section according to Figure 1 seen from the right.
  • Figures 3 and 4 are cross-sectional views of filter arrangements and the lower and upper press plates, respectively, during assembly for use in a machine according to Figure 1.
  • Figures 5 and 6 are perspective views of a filter arrangement according to a first embodiment of the invention.
  • Figure 7 is a cross section of an outer part of the filter arrangement according to Figure 6.
  • Figure 8 is a perspective view of a filter arrangement according to a second embodiment of the invention.
  • Figure 9 is a cross section through an outer part of the filter arrangement according to Figure 8.
  • Figure 10 is a perspective view of a filter arrangement according to a third embodiment of the invention.
  • Figure 11 is a cross section through an outer part of the filter arrangement according to Figure 10.
  • Figures 1 and 2 show schematically the press section of a machine for moulding concrete slabs intended to be placed on the ground or used as wall covering, for instance.
  • the slab-moulding machine comprises a stationary lower stand 1 and a horizontal, circular mould table 2 pivotably journalled at the stand 1 about a vertical shaft by means of an actuator (not shown), and vertically movable by means of an actuator (not shown).
  • the mould table 2 has a plurality of moulds 3, e.g. four moulds, which are moved to different stations in the machine by stepwise rotation of the mould table 2.
  • These stations may include, for instance, a first filling station for filling a wet first batch of concrete having a certain composition and colour, a second filling station for filling a wet second batch of concrete of the same concrete composition but containing different stone material from the first batch and with or without colour pigment, a press station for compressing the concrete and removing water by pressing, and a stripping station for stripping the compressed concrete slabs from the moulds 3 when they arrive in the stripping station.
  • the press section shown in Figures 1 and 2 forms said press station, Figure 1 showing the mould table in raised position in relation to the stand and Figure 2 showing it in lowered position.
  • the two moulds 3 in each pair are located side by side and constitute exchangeable, quadratic mould frames 4 which are secured to the mould table framework 5 by upper and lower attachment members 24.
  • the mould frames 4 suitably consist of four loose, i.e. separate wall plates.
  • On a level with the lower attachment member 24 are four support bosses 8 arranged in pairs opposite each other and each extending past the inside of the wall plate of the mould frame 3, at its centre.
  • Each mould 3 has a bottom formed by a lowerable lower press plate 6 (see Figure 3) which is provided at its lower edge at the middle of the sides with recesses 7 for receipt of the inwardly directed opposing support bosses 8, upon which the lower press plate 6 will then rest.
  • the lower press plate 6 is free from mechanical locking in the mould frame 4 and can therefore be quickly lifted from the mould frame 4 when desired and replaced therein as illustrated in Figure 1.
  • the lower press plate 6 and upper, vertical parts of the mould frame 4 thus define a mould cavity 9 into which said concrete is dosed in said filling stations.
  • the press section comprises two lower pressure pads 10 rigidly mounted on the stand, and two upper pressure heads 11 connected to an actuator 12 for moving the pressure heads 10 up and down in relation to the mould table 2.
  • the latter actuator includes one or more hydraulic cylinders.
  • Each lower pressure pad 10 includes a vacuum plate 16 for cooperation with the lower press plate 6 in the mould frame 4.
  • Each upper pressure head 11 includes a spacer 14 rigidly mounted to a support element 15 common to both pressure heads 11.
  • Each pressure head 11 is also provided with a vacuum plate 13 rigidly mounted to the spacer 14, and an upper press plate 17 located below the vacuum plate 13.
  • Reference number 39 denotes a quick coupling for locking the press plate 17 to the vacuum plate 13 as illustrated in Figure 2.
  • each vacuum plate 13, 16 communicate via connections 18, 19 with a vacuum source (not shown), each vacuum plate being provided with a plurality of channel systems 20, 21 opening on the horizontal side facing the mould table 2.
  • Each press plate 6, 17 is also provided with a plurality of channels 22, 23 (see Figures 3 and 4) which extend between the horizontal sides of the press plate 6, 17 and are arranged to communicate directly with the channels 20, 21 of the vacuum plate 13, 16 when the press plate 6, 17 and vacuum plate 13, 16 are in surface contact with each other.
  • the press section comprises a lower pressure pad and an upper pressure head.
  • Each press plate 6, 17 is provided with a filter arrangement (see Figures 3, 4, 5,6,7) comprising a filter cloth 25 and a frame 26 to enclose the entire filter cloth 25.
  • the filter arrangement and press plate 6, 17 are provided with cooperating attachment means to detachably secure the filter arrangement on the side of the press plate 6, 17 which is to face the mould cavity 9.
  • the filter cloth 25 consists of a plastic material and is provided with sufficient holes or pores for the water to pass through which is to be removed from the plate being compressed.
  • a suitable plastic material is polyamide.
  • the filter cloth 25 is also strong enough to withstand the high pressure to which it is subjected in the pressing step and can be used repeatedly over a considerable time period, e.g. at least one work shift, without being removed from the machine.
  • the frame 26 consists of a plastic material such that the frame 26 is yielding and flexible and can be joined to the filter cloth 25 to form an indivisible unit in an operation casting them together. Such a casting to form a unit is preferably performed during actual manufacture of the frame 26.
  • the frame 26 has a rear part 27 which will face the press plate, 17 and a lateral part 28 which will face the inside of the mould frame 4, abutting against this to provide a seal preventing liquid and solid particles from penetrating therebetween.
  • the filter arrangement is shaped so that the finished concrete slab acquires a smooth, i.e. unbevelled surface, since the inner sides of the frame 26 and filter cloth 25 lie in one and the same plane.
  • the filter cloth 25 can be covered to cover the entire frame 26, extending right out to the side surface of the frame.
  • the frame 26 is also provided with a front part 29 which will face the mould cavity 9.
  • the front part 29 has triangular section and forms a peripheral bevel strip with inwardly facing inclined surface 30.
  • the bevel strip 29 will thus take up a part of the mould cavity, the finished concrete slab thus acquiring corresponding bevelled edges.
  • one of the previously mentioned cooperating attachment means is formed by said rear part 27 which is in the form of a snap-in strip thus extending all round the frame 26.
  • the snap-in strip is provided with a central, U-shaped groove 31, seen in cross section, so that two yielding clamp lips 32, 33 are formed.
  • a beadlike protrusion 34 is formed at the outer edge of the snap-in strip 27, i.e. at the outer clamp lip 33.
  • such a protrusion 34 may also be arranged on the inner edge of the snap-in strip 27, i.e. at the inner clamp lip 32, or, according to yet another alternative, in both places.
  • the second of the cooperating attachment means mentioned earlier is thus formed by a corresponding snap-in groove 35 on the press plate 6, 17 which, with respect to outer contour, has a cross-sectional profile corresponding to the snap-in strip 27 so that the U-shaped groove 31 is kept free to enable movement between the clamp lips 32, 33 at insertion and removal from the snap-in groove 35.
  • the snap-in groove 35 is also provided with an inner protrusion (not shown) (or several) to receive protrusions 35 of the snap-in strip 27 when locking position is achieved.
  • each mould frame Two vertical side walls of each mould frame are provided with two vertical recesses each (not shown), these having a cross section in the form of a circle-segment, for instance, and being arranged to form corresponding vertical protrusions on the finished concrete slab. These protrusions function as spacers between two adjacent concrete slabs to provide a desired gap between the slabs.
  • Two sides of the frame 26 are provided with corresponding circle-segment shaped protrusions 36 arranged to be received in the four recesses of the mould frame to seal them and limit the height of the groove.
  • the press plates 6, 17 are provided with corresponding circle-segment shaped protrusions 37 (see Figures 3 and 4) which will form rear supports for the protrusions 36 in the frames.
  • Figures 10 and 11 show a filter arrangement of the same design as that according to Figures 5-7, but also provided with members 38 for producing impressions in the concrete slab.
  • These impression-forming members 38 consist of the same plastic material as the frame 26 and are formed simultaneously with the frame 26. They are also cast together with the filter cloth 25 in the same way as the frame 26.
  • the impression-forming members consist of two ribs intersecting each other, each extending between two parallel sides of the frame 26 and perpendicular thereto.
  • the ribs 38 suitably have U-shaped or, as shown, V-shaped cross section. Their height may be, for instance, between 5 mm and 15 mm depending on the size of the slab.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Centrifugal Separators (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Surgical Instruments (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)

Claims (14)

  1. Filtervorrichtung für eine Maschine zur Herstellung von Betonplatten, wobei die Maschine folgendes aufweist: eine Vielzahl von horizontalen Formrahmen (4), untere und obere horizontale Preßplatten (6, 17), die so angeordnet sind, daß sie zusammenwirkend mit den Formrahmen (4) geschlossene Formhohlräume (9) für eine Betonmischung bilden, die einen Überschuß an Wasser enthält, und Kanalsysteme (20, 21, 22, 23), die die Formhohlräume (9) mit einer Vakuumquelle zum Absaugen des überschüssigen Wassers verbinden, das während des Preßschrittes freigesetzt wird, und wobei die Filtervorrichtung ein Filtertuch (25) aus einem Kunststoffmaterial aufweist, das angrenzend gegen die Seite einer Preßplatte (6, 17) der definierten Art dem Formhohlraum (9) gegenüberliegt, dadurch gekennzeichnet, daß die Filtervorrichtung außerdem einen Rahmen (26) aus einem flexiblen Kunststoffmaterial aufweist, der das Filtertuch (25) umgibt und mit dem Filtertuch (25) eine nichtteilbare Einheit bildet, und daß der Rahmen (26) ein Seitenteil (28), das zusammen mit vertikalen Innenseiten des Formrahmens (4) dichtend wirkt, und ebenso ein ein Befestigungsmittel bildendes rückseitiges Teil (27) aufweist, das mit Befestigungsmitteln (35) der Preßplatte (6, 17) so zusammenwirkt, daß die Filtervorrichtung an der Preßplatte (6, 17) abnehmbar angebracht ist.
  2. Filtervorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das rückseitige Teil (27) die Form eines Einraststreifens aufweist, und daß die Befestigungsmittel der Preßplatte (6, 17) aus einer entsprechenden Einrastnut (35) bestehen.
  3. Filtervorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß der Einraststreifen (27), im Querschnitt gesehenen, mit einer U-förmigen Nut (31) versehen ist, um eine innere und äußere nachgebende Klemmlippe (32, 33) zu schaffen.
  4. Filtervorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß wenigstens die äußere Klemmlippe (33), die dem Formrahmen (4) am nächsten liegt, mit wenigstens einem wulstförmigen Vorsprung (34) versehen ist, der in eine entsprechende Ausnehmung in der Einrastnut (35) der Preßplatte (6, 17) eingreift.
  5. Filtervorrichtung nach irgendeinem der Ansprüche 1-4, dadurch gekennzeichnet, daß das Filtertuch (25) Randteile aufweist, die die Oberfläche des dem Formhohlraum (9) gegenüberliegenden Rahmens (26) vollständig bedecken zur Herstellung von Betonplatten ohne abgefaste Kanten.
  6. Filtervorrichtung nach irgendeinem der Ansprüche 1-4, dadurch gekennzeichnet, daß das Filtertuch (25) im Querschnitt gesehen Kantenteile hat, die wenigsten den Rahmen (26) halb bedecken, wobei die unbedeckte Oberfläche des Rahmens in der gleichen Ebene liegt wie die Innenseite des Filtertuchs (25), die dem Formhohlraum (9) gegenüberliegt, zur Herstellung von Betonplatten ohne abgefaste Kanten an wenigstens einer Seite.
  7. Filtervorrichtung nach irgendeinem der Ansprüche 1-4, dadurch gekennzeichnet, daß der Rahmen ebenfalls ein vorderes Teil (29) aufweist, das mit einer schrägen Fläche (30) einen Fasenstreifen ausbildet, welcher zur Herstellung von Betonplatten mit abgefasten Kanten an wenigstens einer Seite verwendet wird.
  8. Filtervorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß das abgeschrägte Teil (29) die Randteile des Filtertuchs (25) bedeckt.
  9. Filtervorrichtung nach irgendeinem der Ansprüche 1-8, dadurch gekennzeichnet, daß das Filtertuch (25) aus Polyamid und der Rahmen aus Polyurethan hergestellt ist.
  10. Filtervorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß der Rahmen (26) in Kontakt mit dem Filtertuch (25) so hergestellt wird, daß er gleichzeitig zusammen mit dem Filtertuch gegossen wird.
  11. Filtervorrichtung nach irgendeinem der Ansprüche 1-10, dadurch gekennzeichnet, daß sie außerdem Teile (38) aufweist, um in der Betonplatte Prägungen auszubilden, wobei die Prägeteile (38) in der Ebene des Rahmens (26) liegen, aus dem gleichen Kunststoffmaterial wie der Rahmen (26) bestehen und zusammen mit diesem und/oder dem Filtertuch (25) gegossen werden.
  12. Filtervorrichtung nach Anspruch 11, dadurch gekennzeichnet, daß die Prägeteile (38) zum Ausbilden der Vertiefungen wenigstens eine Rippe enthalten, die sich zwischen zwei benachbarten oder zwei gegenüberliegenden Seiten des Rahmens (26) erstreckt, um entsprechende Nuten in der Betonplatte auszubilden.
  13. Filtervorrichtung nach Anspruch 12, dadurch gekennzeichnet, daß die Rippen (38) einen U-förmigen oder V-förmigen Querschnitt aufweisen und gerade oder gebogen sind.
  14. Filtervorrichtung nach irgendeinem der Ansprüche 1-13, dadurch gekennzeichnet, daß wenigstens zwei benachbarte Seiten des Rahmens (26) mit Vorsprüngen (36) zur Aufnahme in entsprechende Ausnehmungen in den Innenseiten des Formrahmens (4) vorgesehen sind, um die Ausnehmungen in einer Richtung abzudichten, wobei die Ausnehmungen entsprechende Abstandsstücke an der Betonplatte ausbilden.
EP94109038A 1993-06-18 1994-06-13 Filtervorrichtung Expired - Lifetime EP0629477B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9302109A SE501352C2 (sv) 1993-06-18 1993-06-18 Filteranordning
SE9302109 1993-06-18

Publications (2)

Publication Number Publication Date
EP0629477A1 EP0629477A1 (de) 1994-12-21
EP0629477B1 true EP0629477B1 (de) 1997-09-03

Family

ID=20390332

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94109038A Expired - Lifetime EP0629477B1 (de) 1993-06-18 1994-06-13 Filtervorrichtung

Country Status (7)

Country Link
EP (1) EP0629477B1 (de)
AT (1) ATE157584T1 (de)
DE (1) DE69405302T2 (de)
DK (1) DK0629477T3 (de)
FI (1) FI107516B (de)
NO (1) NO178271C (de)
SE (1) SE501352C2 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004076023A1 (en) * 2003-02-28 2004-09-10 Madison Filter 981 Limited Dewatering of paving slabs
GB2504848A (en) * 2012-08-09 2014-02-12 Eco Filters Ltd Press mould filter assembly
GB2504751A (en) * 2012-08-09 2014-02-12 Eco Filters Ltd Press Mould Filter Assembly
CN105459248A (zh) * 2014-09-05 2016-04-06 临夏市能成古典建筑装饰工程有限责任公司 压模机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1294828B1 (it) * 1997-07-24 1999-04-15 Longinotti Meccanica S R L Apparecchiatura per produrre mattonelle sottili di impasto cementizio

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1023789B (it) * 1974-11-07 1978-05-30 Longinotti Spa Apparecchiatura per la fabbricazione di matonelle di cemento con stampi di pressatura provvisti di fondo aspirante per effetto di depressione
US4053268A (en) * 1974-12-27 1977-10-11 Kabushiki Kaisha Osaka Packing Seizosho Apparatus for molding a slurry of calcium silicate crystals
SE442725B (sv) * 1982-07-06 1986-01-27 Eriks Betong S T Anordning vid en for framstellning av betongplattor avsedd formningsmaskin

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004076023A1 (en) * 2003-02-28 2004-09-10 Madison Filter 981 Limited Dewatering of paving slabs
GB2504848A (en) * 2012-08-09 2014-02-12 Eco Filters Ltd Press mould filter assembly
GB2504751A (en) * 2012-08-09 2014-02-12 Eco Filters Ltd Press Mould Filter Assembly
GB2504848B (en) * 2012-08-09 2015-12-30 Eco Filters Ltd Filter assembly
GB2504751B (en) * 2012-08-09 2016-02-03 Eco Filters Ltd Filter assembly
CN105459248A (zh) * 2014-09-05 2016-04-06 临夏市能成古典建筑装饰工程有限责任公司 压模机
CN105459248B (zh) * 2014-09-05 2018-01-19 临夏市能成古典建筑装饰工程有限责任公司 压模机

Also Published As

Publication number Publication date
NO942271L (no) 1994-12-19
FI942865A (fi) 1994-12-19
FI942865A0 (fi) 1994-06-16
EP0629477A1 (de) 1994-12-21
SE501352C2 (sv) 1995-01-23
DE69405302D1 (de) 1997-10-09
NO178271C (no) 1996-02-21
ATE157584T1 (de) 1997-09-15
DE69405302T2 (de) 1998-04-09
FI107516B (fi) 2001-08-31
SE9302109D0 (sv) 1993-06-18
NO942271D0 (no) 1994-06-16
SE9302109L (sv) 1994-12-19
NO178271B (no) 1995-11-13
DK0629477T3 (da) 1998-04-14

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