WO1995009723A1 - Procede d'adjonction de fibres de renforcement a un materiau moule et dispositif d'apport et d'adjonction de ces fibres - Google Patents

Procede d'adjonction de fibres de renforcement a un materiau moule et dispositif d'apport et d'adjonction de ces fibres Download PDF

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Publication number
WO1995009723A1
WO1995009723A1 PCT/SE1994/000927 SE9400927W WO9509723A1 WO 1995009723 A1 WO1995009723 A1 WO 1995009723A1 SE 9400927 W SE9400927 W SE 9400927W WO 9509723 A1 WO9509723 A1 WO 9509723A1
Authority
WO
WIPO (PCT)
Prior art keywords
wire
fibres
unit
stuff
fibre
Prior art date
Application number
PCT/SE1994/000927
Other languages
English (en)
Inventor
Arne Nordin
Jukka Suomela
Original Assignee
Confiber 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 Confiber Ab filed Critical Confiber Ab
Priority to JP7510760A priority Critical patent/JPH09503458A/ja
Priority to EP94929712A priority patent/EP0722381A1/fr
Publication of WO1995009723A1 publication Critical patent/WO1995009723A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F45/00—Wire-working in the manufacture of other particular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F11/00—Cutting wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F23/00—Feeding wire in wire-working machines or apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F45/00—Wire-working in the manufacture of other particular articles
    • B21F45/006—Wire-working in the manufacture of other particular articles of concrete reinforcement fibres
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/012—Discrete reinforcing elements, e.g. fibres

Definitions

  • a process for adding reinforcement fibres to cast stuff and a device for providing and adding such fibres.
  • the present invention relates firstly to a process and secondly to a device of the types specified in the preambles to Patent Claims 1 and 7, respectively.
  • Concrete is being used to an ever increasing extent as a building and construction material.
  • concrete which is not reinforced has a relatively limited ability to absorb and transmit tension loads; indeed, the tensile strength amounts to only about 10% of the com ⁇ pression strength.
  • the reinforcement can consist of bars, gratings, nets, thin wires, wires and the like, which are normally manufactured from steel. Fibres made of metal or organic material can also be used as reinforcement.
  • the concrete is then termed fibre- reinforced concrete.
  • the object of the present invention is to remove the abovementioned disadvantages which are inherent in the known technique and to make available a more advanced and appreciably improved technique (both process and device) for producing reinforcement fibres and, directly thereafter, adding the fibres to cast stuff, preferably concrete stuff.
  • the fibres, which are to be mixed into the cast stuff are produced, using a wire which is unwound continuously from a storage spool, by means of wire pieces, which form the reinforce ⁇ ment fibres and have a predetermined length, being detached continuously and consecutively from the wire in the region of its free end, and by means of these detached wire pieces being fed continuously one after the other, and with high kinetic energy, directly into a mixer which is in operation and in which the cast stuff is undergoing mixing.
  • the novel technique is suitable for producing reinforcement fibres (preferably steel fibres) which have a length/diameter ratio of up to at least 200, and for mixing fibres into cast stuff (preferably concrete stuff) .
  • the length of the fibre should be as great as possible.
  • appropriate wire diameters can be between, for example, 0.4 mm and 1.0 mm. Fibre lengths within the range 30 mm - 80 mm can be appropriate. Increased adhesive capacity can also be achieved by using embossed wire.
  • the very good distribution of the fibres in the cast stuff (the concrete stuff) which is achieved using the process according to the invention ensures that the fibres fulfil their function very adequately and bring about an efficient reinforcing effect in the concrete.
  • the process according to the invention is not restricted to metallic fibres, and, instead, it is also possible to conceive of using fibres made of organic material with the proviso that the latter material exhibits an E modulus which is appropriate with regard to the properties of the concrete.
  • the reinforcement fibres In general, when the cast s.tuff is concrete stuff, it is likely to be appropriate for the reinforcement fibres to consist of steel fibres which are produced from a steel wire which is unwound from the storage spool. Under these circumstances, the cast stuff is a concrete stuff which is present in the mixer and which is prepared, or compounded, from cement, ballast, water, and additives where appropriate.
  • the wire which is unwound from the storage spool is expediently supplied continuously, using a wire-impel ⁇ ling unit which impels the wire forwards, to a fibre- detaching unit which detaches the wire pieces.
  • This impelling unit is preferably arranged immediately prior to, i.e. upstream of, the fibre-detaching unit, with the impelling unit and the detaching unit being operated in such a manner that they impart to the fibre pieces which are detached continuously and consecutively from the wire a kinetic energy which flings the fibres directly into the mixer, which is arranged downstream of the detaching unit and in which the fibres are mixed into the cast stuff.
  • the wire from which the fibres (the wire pieces) are detached is thus a wire which is unwound continuously from a storage spool and from whose free end region the fibres are continuously detached in the fibre-detaching unit, from which the fibres, due to their high kinetic energy, are flung into the mixer.
  • the wire storage spool is expediently mounted or a balance which shows, for example digitally, how much wire has, at any moment, already been unwound from the spool in question.
  • the balance then operates with so-called negative weighing, i.e. all the time indicates the decrease in weight which the spool has undergone from the time at which the fibre detachment commenced.
  • a device having the features specified in Patent Claim 7 is proposed for producing reinforcement fibres and adding the fibres to cast stuff, for example concrete stuff, which is under ⁇ going mixing in a mixer.
  • Such a device comprises, firstly, at least one storage spool, on which wire, for example metal wire, is wound and which is mounted on a balance, secondly a wire- impelling unit, through which the wire which can be unwound from the storage spool passes and which is in driving engagement with the wire, and, thirdly, a fibre- detaching unit which is arranged adjacent to the impel- ling unit.
  • This detaching unit is in engagement with the wire supplied from the impelling unit and is used for continuously and consecutively detaching from the wire the wire pieces which form the fibres. Due to the kinetic energy which the impelling unit and the detaching unit impart to the fibres, the latter are flung into the rotating mixer, which is mounted downstream and in which the fibres are mixed into the cast stuff.
  • the wire-impelling unit then comprises a driving wheel which interacts with a rotatably mounted guide roller and which has a cylin ⁇ drical wire engagement surface which, together with the peripheral surface of the guide roller, forms a driving nip for the wires which run in parallel through it.
  • the detaching unit then comprises a driven cutting wheel which interacts with a rotatably mounted guide roller, engages with the wires supplied from the driving wheel and, on its cylindrical peripheral surface, is provided with two parallel rims of cutting steel which, when the wheel rotates, effect piece-by-piece detachment of one wire fibre piece at a time from each wire during its passage through the driving nip between the cutting wheel and its guide roller.
  • the wire engagement surface of the driving wheel is appropriately designed in order to obtain a high degree of friction against the wire.
  • the device according to the invention may appropriately display the features speci ⁇ fied in Claim 9.
  • Stainless steel tubes having a diameter of, for example, 10 mm are appropriately arranged between each storage spool and the driving nip of the driving wheel as guiding tubes for the wires.
  • the cutting wheel of the detaching unit possesses cutting element rims which include cutting elements whose number depends on the outer diameter of the cutting wheel and on the desired fibre length. These cutting elements are expediently cutti j teeth with cutting edges made of a very hard material.
  • the cutting wheel In a device which has two storage spools, and, as a result, two parallel wires entering the wire-impelling unit and the fibre-detaching unit, it is appropriate for the cutting wheel to have a rim of cutting elements for each wire, at each circumferential margin of the cylin ⁇ drical peripheral surface of the cutting wheel.
  • the cutting elements in each such rim are expedi ⁇ ently arranged at regular distances along each circum ferential margin, and the cutting elements in one of the rims are then offset in the circumferential direction in relation to the cutting elements in the other rim.
  • the cutting elements which are preferably provided with cut ⁇ ting edges made of a hard material, can be fixed in recesses which are directed outwards towards the cylindrical peripheral surface of the cutting wheel at each circumferential margin of the cutting wheel.
  • the cutting wheel is preferably dimensioned and/or driven in relation to the driving wheel such that the peripheral velocity of the wire at the cutting wheel nip is somewhat greater than the peripheral velocity of the wire at the driving wheel nip. This ensures that detachment of the fibre pieces at the cutting wheel nip is effected, in reality, by the wire pieces which form the fibres being torn off from each wire by the cutting elements of the cutting wheel when these elements engage with, and virtually cut through, each wire in its radial direction in the cutting wheel nip.
  • the technique according to the invention makes it possible to achieve a high concentration of steel fibres in a concrete stuff without there being any risk of the formation of a so-called bolus of fibres which have clumped together.
  • the equipment may advantageously be wholly or partially automated and coordinated with an existing control system and equipment for producing concrete stuff, for example in a concrete mixer in a concrete mixing plant.
  • the equipment according to the invention may also be sited entirely separately from such a concrete mixer and, instead, be arranged for the direct metering of the fibres into a concrete lorry's rotating transport vessel for ready-mixed concrete stuff.
  • Equipment constructed according to the principles of the present invention can be readily provided with an electrical control system including automatic gentle start and stop.
  • Fig. 1 shows, in side view, a wire-feeding and fibre- generating device according to the invention for producing reinforcement fibres and adding these fibres to, for example, concrete stuff;
  • Fig. 2 shows, in perspective, a cutting wheel belonging to a fibre-detaching unit according to Fig. 1;
  • Fig. 3 shows a side view of the cutting wheel according to Fig. 2;
  • Fig. 4 shows an enlarged detail of the margin section of the cutting wheel according to Fig. 3;
  • Fig. 5 shows an edge view of the cutting wheel according to Fig. 3;
  • Fig. 6 shows an enlarged detail view of the margin section of the cutting wheel according to Fig. 5; and Fig. 7 shows, in perspective, how a device according to the invention can be mounted.
  • Fig. 1 shows, in diagrammatic form, a side view of the primary parts of a device according to the inven ⁇ tion.
  • the device is intended for producing reinforcement fibres and adding these fibres to cast stuff which is undergoing mixing in a stationary mixer or in a rotatable transport vessel on a vehicle for transporting the cast stuff in question.
  • the cast stuff is concrete stuff and that the wire which is used for producing the reinforcement fibres is metal wire, such as steel wire.
  • the equipment shown in Fig. 1 is mounted on a supporting plate 2 which is supported by a stand which is not shown here in any detail.
  • the device according to the invention also includes two storage spools on which metal wire is wound.
  • These storage spools can be of a standard type and are each expediently placed in its own cylindrical or conical container 3 (see Fig. 7) , which has a conical lid 5 at the centre of which there is an exit hole for the steel wire which is wound off from the spool in the wire con ⁇ tainer.
  • the storage spools are mounted vertically in the wire containers 3, which are likewise vertical.
  • the wire containers, which thus contain the storage spools, are mounted on a stand 7, which functions as a balance, by means of which it is easy to determine the weight of the wires which have been unwound from the storage spools.
  • the wire-impelling unit 4 comprises a motor- driven driving wheel 10 and a guide roller 12, which interacts with this driving wheel and is rotatably mounted in a roller holder 14 which, in turn, is adjust ⁇ ably mounted on the supporting plate 2 and in relation to an anchor plate 16 which is connected thereto.
  • the driving wheel 10 has a cylindrical wire- engagement surface 18 which, together with the peripheral surface of the guide roller 12, forms a driving nip 20 for the wires 6, 6' which run in parallel through it.
  • the wire-engagement surface 18 of the driving wheel 10 is expediently provided with a friction-generating surface coating, for example an electroplated surface layer con- taining diamond grains.
  • a friction-generating surface coating for example an electroplated surface layer con- taining diamond grains.
  • the fibre-detaching unit 8 comprises a motor- driven cutting wheel 28 and a guide roller 30, which interacts with the cutting wheel 28 and which is rota- tably mounted in a holder 32 which, like the roller holder 14, is adjustably mounted on the supporting plate 2.
  • the holders 14 and 32 are adjustable in the direction towards the wheel axles 58 and 60.
  • the roller holder 14 is adjustable in relation to its attachment 38 by means of a screw mechanism comprising an adjustment screw 19 having a locking nut 21 and a turning nut 23.
  • the holder 14 (and thus the guide roller 12) is elasti- cally pretensioned in the direction towards the driving wheel 10 by means of a rubber buffer 36.
  • the roller holder 32 is adjustable in the vertical direction in the same way as the holder 14 and, for this, has a screw mechanism of the same type as that of the holder 14. However, the holder 32 does not have any elastic preten- sioning element.
  • the cutting wheel 28 which engages with the wires 6, 6' which are supplied by the wire-impelling unit 4, has, on its cylindrical peripheral surface 40, two parallel rims of cutting elements 42 and 44, respec- tively, as is also evident from Fig. 2.
  • these cutting elements 42, 44 effect a piece-by-piece detachment of one wire fibre piece at a time from the wire 6 and 6' , respectively, during passage of the latter through the driving nip 26 between the cut- ting wheel 28 and the guide roller 30.
  • the cutting wheel 28, with its cutting elements 42 and 44 respec ⁇ tively, effects, in the fibre-detaching unit 8, a c tinuous and consecutive detachment of wire pieces fr ⁇ m the wires 6, 6' .
  • These detached wire pieces constitute reinforcement fibres which, by virtue of their kinetic energy obtained from the impelling unit 4 and the detach ⁇ ing unit 8, are flung onwards into a nozzle tube 46 whose inlet end is shaped such that it projec* s inwards to a point directly downstream of the driving nip 26.
  • the fibres which are flung into the nozzle tube 46 continue, from the opposite end, which is not shown here, of the tube 46, into a mixer which is placed downstream of t. ⁇ e nozzle tube 46.
  • the driving wheel 10 and the cutting wheel 28 are, in this instance, driven by a common motor 48 which is arranged on the reverse side of the supporting plate 2.
  • the driving force from the driving wheel 50 of the motor is expediently transmitted to the driving wheel 10 and the cutting wheel 28 by means of a driving chain or a cog belt 52.
  • the drives 54 and 56 of the wheels 10, 28, which drives interact with the belt/chain 52, are, of course, placed on the wheel axles 58 and 60, respectively, on the reverse side, which is not shown in Fig. 1, of the supporting plate 2.
  • the wires 6, 6' are each conducted, from the two wire containers, which are not shown here and which are mounted on a balance, to the driving nip 20 between the driving wheel 10 and its guide roller 12 through their own conducting-in tubes 62 and 62', respectively, arranged between each respective wire container and the nip.
  • these two conducting-in tubes it is probably preferable for these two conducting-in tubes to be each divided, by means of a pair of quick couplings 64 and 64', into two parts, namely a first conducting part which is connected to a respective wire container, and a second conducting part, which can be coupled to the latter by means of a respec ⁇ tive quick coupling and which is fixed to the supporting plate 2 by means of two holders 66 and 68 which are attached to the supporting plate.
  • the cutting wheel 28 has a rim of cutting elements 42, 44 at each circumferential margin of its cylindrical peripheral surface 40.
  • the cutting elements 42 and 44, respectively, in each rim are arranged at regular distances along each respective circumferential margin.
  • the cutting elements (for example 42) in the one rim are offset by one half distance in the circumferential direction in relation to the cutting elements 44 in the other rim.
  • the cutting elements 42, 44 are fixed in recesses 70 which are directed outwards towards the cylindrical peripheral surface 40 at each respective circumferential margin of the cutting wheel 28.
  • the latter has a cutting edge 72 made of synthetic diamond at its bevelled functional margin.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Paper (AREA)
  • Ropes Or Cables (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

Un procédé et un dispositif permettent de produire des fibres de renforcement et de les ajouter à du béton. On produit ces fibres à partir d'un fil (6) continu, sous forme de tronçons de fil qu'on détache de manière consécutive de ce fil, ces fibres étant alors projetées par leur énergie cinétique dans une bétonnière où est en cours le mélange du béton. Un dispositif, qui permet d'appliquer ce procédé, comprend une bobine de fil, montée sur une balance et dont le fil (6) se déroule vers une distributrice (4). Une séparatrice (8) de fibres entre ensutie en prise avec le fil fourni par cette distributrice et détache consécutivement des tronçons de ce fil. Les fibres ainsi détachées traversent une buse (46) disposée en aval de cette séparatrice (8) pour les guider alors vers une bétonnière qui contient le béton. La distributrice (4) et la séparatrice (8) de fibres comprennent chacune une roue entraînée (10 et 28 respectivement), qui entre en prise avec le fil, et un galet-guide (12 et 30 respectivement) qui coopère avec cette roue.
PCT/SE1994/000927 1993-10-05 1994-10-05 Procede d'adjonction de fibres de renforcement a un materiau moule et dispositif d'apport et d'adjonction de ces fibres WO1995009723A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP7510760A JPH09503458A (ja) 1993-10-05 1994-10-05 補強ファイバーをコンクリート注入型に加える方法および前記ファイバーをコンクリート注入型に供給し加えるための装置
EP94929712A EP0722381A1 (fr) 1993-10-05 1994-10-05 Procede d'adjonction de fibres de renforcement a un materiau moule et dispositif d'apport et d'adjonction de ces fibres

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9303254A SE501862C2 (sv) 1993-10-05 1993-10-05 Förfarande för tillsättning av armeringsfibrer i gjutmassa samt anordning för framställning och tillsättning av sådana fibrer i gjutmassa, exempelvis betongmassa
SE9303254-8 1993-10-05

Publications (1)

Publication Number Publication Date
WO1995009723A1 true WO1995009723A1 (fr) 1995-04-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1994/000927 WO1995009723A1 (fr) 1993-10-05 1994-10-05 Procede d'adjonction de fibres de renforcement a un materiau moule et dispositif d'apport et d'adjonction de ces fibres

Country Status (5)

Country Link
EP (1) EP0722381A1 (fr)
JP (1) JPH09503458A (fr)
CA (1) CA2173501A1 (fr)
SE (1) SE501862C2 (fr)
WO (1) WO1995009723A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6550362B1 (en) 2000-10-25 2003-04-22 Si Corporation Apparatus and method for dispensing fibers into cementitious materials
WO2005018896A1 (fr) * 2003-08-15 2005-03-03 Bracegirdle P E Procede de production de materiaux a base de ciment et d'asphalte a renfort de fibres
US6971784B1 (en) * 2002-09-06 2005-12-06 Bracegirdle Paul E Process for producing fiber reinforced hot-mix asphaltic and cementitous structural materials with fiber pellets produced from carpet waste
US7563017B1 (en) * 2002-09-06 2009-07-21 Bracegirdle Paul E Process for mixing congealable materials such as cement, asphalt, and glue with fibers from waste carpet
CN116239392A (zh) * 2023-03-24 2023-06-09 长兴兴鹰新型耐火建材有限公司 一种回转窑篦冷机用的浇注料

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5243124B2 (ja) * 2008-07-16 2013-07-24 オークマ株式会社 工作機械

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH460620A (fr) * 1966-06-06 1968-07-31 Saint Gobain Procédé et installation pour l'incorporation de fibres ou fils à des liants minéraux
EP0499572A1 (fr) * 1991-02-12 1992-08-19 Skako A/S Procédé et installation pour la coupe du fil continu en fibres coupées et dosant les dernières dans un mélange béton

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH460620A (fr) * 1966-06-06 1968-07-31 Saint Gobain Procédé et installation pour l'incorporation de fibres ou fils à des liants minéraux
EP0499572A1 (fr) * 1991-02-12 1992-08-19 Skako A/S Procédé et installation pour la coupe du fil continu en fibres coupées et dosant les dernières dans un mélange béton

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6550362B1 (en) 2000-10-25 2003-04-22 Si Corporation Apparatus and method for dispensing fibers into cementitious materials
US6971784B1 (en) * 2002-09-06 2005-12-06 Bracegirdle Paul E Process for producing fiber reinforced hot-mix asphaltic and cementitous structural materials with fiber pellets produced from carpet waste
US7563017B1 (en) * 2002-09-06 2009-07-21 Bracegirdle Paul E Process for mixing congealable materials such as cement, asphalt, and glue with fibers from waste carpet
WO2005018896A1 (fr) * 2003-08-15 2005-03-03 Bracegirdle P E Procede de production de materiaux a base de ciment et d'asphalte a renfort de fibres
CN116239392A (zh) * 2023-03-24 2023-06-09 长兴兴鹰新型耐火建材有限公司 一种回转窑篦冷机用的浇注料
CN116239392B (zh) * 2023-03-24 2024-01-09 长兴兴鹰新型耐火建材有限公司 一种回转窑篦冷机用的浇注料

Also Published As

Publication number Publication date
EP0722381A1 (fr) 1996-07-24
SE9303254D0 (sv) 1993-10-05
SE9303254L (sv) 1995-04-06
SE501862C2 (sv) 1995-06-06
JPH09503458A (ja) 1997-04-08
CA2173501A1 (fr) 1995-04-13

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