WO1996005039A1 - Perfectionnements relatifs a la recuperation de la gomme des bandes de roulement constituant les pneumatiques d'automobiles - Google Patents

Perfectionnements relatifs a la recuperation de la gomme des bandes de roulement constituant les pneumatiques d'automobiles Download PDF

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Publication number
WO1996005039A1
WO1996005039A1 PCT/AU1995/000498 AU9500498W WO9605039A1 WO 1996005039 A1 WO1996005039 A1 WO 1996005039A1 AU 9500498 W AU9500498 W AU 9500498W WO 9605039 A1 WO9605039 A1 WO 9605039A1
Authority
WO
WIPO (PCT)
Prior art keywords
jets
breaker strip
tread
tread rubber
rubber
Prior art date
Application number
PCT/AU1995/000498
Other languages
English (en)
Inventor
George Veres
Original Assignee
Cmht Technology (Australia) Pty. Ltd.
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 Cmht Technology (Australia) Pty. Ltd. filed Critical Cmht Technology (Australia) Pty. Ltd.
Priority to EP95927587A priority Critical patent/EP0777561A4/fr
Priority to AU31578/95A priority patent/AU3157895A/en
Publication of WO1996005039A1 publication Critical patent/WO1996005039A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/003—Cutting work characterised by the nature of the cut made; Apparatus therefor specially adapted for cutting rubber
    • B26D3/005—Cutting work characterised by the nature of the cut made; Apparatus therefor specially adapted for cutting rubber for cutting used tyres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • B29B17/0206—Selectively separating reinforcements from matrix material by destroying the interface bound before disintegrating the matrix to particles or powder, e.g. from tires or belts
    • B29B17/021—Selectively separating reinforcements from matrix material by destroying the interface bound before disintegrating the matrix to particles or powder, e.g. from tires or belts using local heating of the reinforcement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • B29B17/0206—Selectively separating reinforcements from matrix material by destroying the interface bound before disintegrating the matrix to particles or powder, e.g. from tires or belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/04—Disintegrating plastics, e.g. by milling
    • B29B2017/0424—Specific disintegrating techniques; devices therefor
    • B29B2017/0428—Jets of high pressure fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2030/00—Pneumatic or solid tyres or parts thereof
    • B29L2030/002—Treads
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Definitions

  • a vehicle tyre is constructed in the form of a carcass made up of a layer of reinforcing material impregnated with a rubber compound, the carcass being secured to a rubber impregnated metal reinforced rings forming the respective opposite beads of the tyre, and supporting the tread portion of the tyre.
  • the tread portion made of a higher quality rubber compound, encircles the central portion of the carcass, and incorporates a metal filamentary reinforcement band, commonly referred to as a 'breaker strip'.
  • this residual rubber is in the form of short individual fibres of rubber upstanding from the tyre breaker strip and attached thereto at one end.
  • These residual tread rubber fibres represent a loss in the quantity of recovered high value tread rubber, and also necessitates the performing of a further treatment the breaker strip if the metal wires thereof are to be totally free of rubber and suitable to be recycled.
  • a method of removing rubber from the breaker strip of the tread portion of a tyre comprising the step of treating the tread rubber with UHP fluid jets with at least some of the jets directed in a direction inclined to the plane of the breaker strip of the portion of the tread being treated, to thereby subject the tread rubber to a cutting action in a direction inclined to said plane of the breaker strip.
  • the inclination of the respective UHP fluid jets are arranged so that the jets issuing from adjacent nozzles intersect at or near the interface of the breaker strip and the tread rubber.
  • the portion of the tread rubber being treated by the UHP fluid jets is simultaneously subjected to treatment by UHP fluid jets inclined to each other, in one example, the simultaneous treatment is effected by first jets substantially normal to the plane of the breaker strip and second jets inclined to the plane of the breaker strip.
  • the inclination of the respective UHP fluid jets are arranged so the inclined jet intersect the normal jets at or near the interface of the breaker strip and the tread rubber.
  • the UHP fluid jets are arranged in pairs each oppositely inclined.
  • the tread portion of the tyre is subjected to treatment by a plurality of UHP fluid jet arranged in a bank which moves in a circular path.
  • each bank moves in a circular path so that the paths of adjacent UHP fluid jets move in overlapping circular paths.
  • the banks of jets and the circular paths thereof are arranged so together a band of tread rubber extending across the width of the tyre tread is processed simultaneously.
  • the jets are conveniently each inclined to the plane of the breaker strip at an angle of 65° or more, preferably in the range of 70° to 80°. It is to be understood that if the angle of inclination is too low or flat in relation to the surface being cut, the jet is deflected or dispersed rather than penetrating the surface it contacts. Thus, the jets do not cut to the full depth of the tread rubber.
  • two rows of jets are provided, the jets in the respective rows being oppositely inclined at equal angles to the breaker strip surface to form a bank of jets, the included angle therebetween being in the range up to 45° and preferably between 20° and 40°.
  • Each nozzle bank do not rotate on a fixed axis but moves along a circular path while maintaining a substantially fixed orientation with respect to the tyre tread portion.
  • the nozzles in each bank are arranged in two oppositely inclined rows so that the path described by adjacent nozzles, as the nozzle bank traverses the circular path, overlap.
  • the paths of adjacent nozzles in the same row overlap one with the other and the paths of adjacent nozzles in opposite rows also overlap.
  • the present invention apparatus for removing rubber from the breaker strip of the tread portion of a tyre comprising, an array of nozzles arranged to each receive UHP fluid to issue therefrom as UHP fluid jets, at least some of said nozzles being arranged so the UHP fluid jet issued therefrom is inclined to the plane of the breaker strip from which the rubber is to be removed.
  • the nozzles are arranged in one or more banks each having two parallel rows of nozzles with the nozzles in one row inclined to the nozzles in the adjacent row.
  • the inclination of the nozzles in the respective rows of each bank being conveniently such that in use the fluid jets intersect or cross substantially at the face of the breaker strip from which the tread rubber is to be removed.
  • the included angle between the fluid jets in adjacent rows is up to 45° and more particularly between 20° and 40°.
  • Figure 1 is a diagrammatic cross-sectional view of a typical vehicle tyre.
  • Figure 2 is a side elevational view of the nozzle block.
  • Figure 3 is a view from below of the nozzle block; shown in Figure 2.
  • Figure 4 is a sectional view along the lines 3-3 in Figure 2;
  • Figure 5 is an illustration of one arrangement overlapping nozzle paths
  • Figure 6 is an illustration fo multi-nozzle block layout.
  • Figure 7 is a suitable drive mechanism to move a pair of nozzle blocks in respective circular paths.
  • the conventional vehicle tyre 26 shown therein has a tread portion 21 opposite sidewalls 27 each having a bead 28.
  • each bead 28 includes a rigid ring made of a number of coils of steel wire.
  • the tread portion 21 comprises a breaker strip 22, normally composed of metal fibres with relatively thick outer layer of high quality tread rubber 29 bonded thereto.
  • the sidewalls 27 and the inner wall part 27a underlying the tread portion are formed of a lower quality rubber usually with a fabric reinforcement therein. This is the construction of a typical vehicle tyre that can be processed by the method of the present invention.
  • the nozzle block 10 is made of steel or a material of comparable strength having regard to the fluid pressure at which the cutting process is to be performed. Extending upwardly from the lower face 18 of the nozzle block 10 are a series of fourteen nozzle cavities 11 arranged in two side by side rows. Each of seven nozzle cavities 11 in each row as seen in Figure 3 are collectively ad identified respectively as rows A and B. The centre lines only of the respective nozzle cavities are shown in Figure 2 for the sake of clarity.
  • the cavities 11 in row A each communicate with distribution duct 14 by respective nozzle passages 13, and the cavities 11 in row B communicate with the distribution duct 15 by respective nozzle passages 16.
  • Each of the distribution ducts 14 and 15 individually communicate with the chamber 17 by respective transverse ducts, such as at 19 extending between duct 15 and chamber 17.
  • the chamber 17 is coupled to a source of high pressure liquid, such as water.
  • the nozzle cavities 11 and the nozzle passages 13 and 16 are equally and oppositely inclined with respect to the lower face 18 of the nozzle block 10.
  • the included angle between the respective passages 13 and 16 being of the order of 30°, and being symmetrical with respect to the central vertical plane through the nozzle block 10.
  • the nozzle cavities 11 and their associated nozzle passages resultantly having the axis thereof inclined at 75° to the plane of the lower face 18 of the nozzle block 10.
  • Nozzles (not shown) of known construction are removably fitted into each of the nozzle cavities 11 , such as by threaded engagement.
  • the bore size of the nozzle is selected to provide the desired diameter and velocity of the liquid jet issuing from the nozzle, having regard to the pressure at the nozzle of the fluid supplied from the chamber 17.
  • the included angle between the jets issuing from the nozzles in the respective rows, and the distance between the rows of nozzles, are selected so that the plane of the respective rows of jets intersect at E as shown in Figure 4, a distance from the lower face 18 of the nozzle block 10 determined by the angle of inclination and the lateral spacing of the nozzle cavities.
  • the nozzle block is located so that the intersection of the jets as indicated at E is substantially at or about the level of the upper surface of the metal reinforcement of the breaker strip in the tread portion 21 of the tyre being processed. This results in the tread rubber of the tyre being removed completely down to the level of the metal reinforcement, constituting the breaker strip.
  • This relative relation of the nozzle block and the fluid jets to the breaker strip ensures that the tread rubber is removed right down to the surface of the breaker strip 22, thereby providing maximum recovery of the high value tread rubber, and a high level of cleaning of the tread rubber from the breaker strip prior to subsequent processing of the steel filaments forming the breaker strip.
  • Th effectiveness of the removal of the tread rubber from the bis enhanced if the nozzle block 11 is subjected to a movement so that breaker strip the nozzle cavities 11 and the nozzles assembled thereto, each move simultaneously in a circular path as shown diagrammatically in Figure 5.
  • the nozzle cavities in row B are offset with respect to the nozzle cavities in row A by a distance equal to one half of the pitch between adjacent nozzles in the row.
  • the circular path of the nozzle assembles is greater than the space between two adjacent nozzle in the same row W so that those paths of two adjacent nozzles in the same row overlap. Further it is seen that the path of the nozzle assembles in row B overlap the paths of the two adjacent nozzle assemblies in row A.
  • a strip of the width "C" is treated by the single nozzle head.
  • Normally two or three nozzle heads are arranged to span the full width of the tyre tread portion, as shown diagrammatically in Figure 6, so that the full width of the tread portion of the tyre can be striped of tread rubber in a single pass.
  • the tyre tread portion 25 is fed in the direction of the arrow D and the tread rubber 26 is progressively removed down to the upper surface of the metal breaker strip across the width of the tread.
  • the nozzles in each of the rows A and B are spaced at a pitch of 9 mm and the circular movement of the nozzle block is 12 mm diameter so that there is an overlap of 2 mm in the paths of adjacent nozzles. Further, the nozzles in rows A and B are spaced in the direction of the row by 1/ 2 said pitch, and spaced laterally 9 mm. Thus, the path of movement of the nozzle in the direction across the rows A and B also overlay by 2 mm also.
  • the feed rate of the tread portion of the tyre past the nozzle bank is in the order of 350 to 1000 mm per minute.
  • FIG. 6 A simplified illustration of a drive mechanism suitable to effect the above referred to circular movement of two adjacent nozzle assemblies, as shown in Figure 6, will now be described with reference to Figure 7.
  • Two nozzle assemblies 10 as previously described are rigidly mounted on the opposite sides of the carrier column 30, at the lower end thereof.
  • the base plate 31 is rigidly mounted in a fixed position on the base or frame of the machine through which the tyre tread portion is fed for the removal of the tread rubber.
  • Mounted on the base plate 31 is a gear box 32, and an electric motor 33 is mounted on the gear box 32.
  • each shaft 34 has upper and lower eccentric portions which engage circular apertures in the respective drive rods 35 whereby rotation of the shafts 34 will impart a circular orbital movement to each of the rods 35, to move the rods in unison.
  • the carrier bar 36 is fixedly secured at the respective ends thereof to the rods 35 so as to also describe a circular orbital motion with the rods 35.
  • the circular orbital motion may be of the order of 400-500 cycles per minute.
  • a bracket 37 Mounted on the carrier bar 36 is a bracket 37 to which the carrier column 30 is attached so as to impart the circular orbital motion thereto.
  • the bolts 38 attaching the bracket 37 to the carrier bar 36 permit adjustment of vertical position of the bracket and hence of the nozzle assemblies 10. This enalbes the nozzle assemblies to be correctly positioned relative to the size of tyre being processed so that the UHP jets intersect at the surface of the breaker strip.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Tyre Moulding (AREA)

Abstract

L'invention concerne un procédé permettant d'enlever la gomme du sous-protecteur constituant une partie de la bande de roulement d'un pneumatique. Le procédé consiste à traiter la gomme à l'aide de jets de liquide à très haute pression, les jets étant inclinés par rapport au plan du sous-protecteur constituant une partie de la bande de roulement à traiter, de telle sorte que la gomme soit soumise à un effet de cisaillement dans une direction inclinée par rapport audit plan du sous-protecteur. La partie de la gomme à traiter à l'aide des jets de liquide à très haute pression est soumise en même temps à un traitement à l'aide de jets de liquide à très haute pression qui sont inclinés les uns par rapport aux autres et qui se coupent au niveau du sous-protecteur ou à proximité de celui-ci.
PCT/AU1995/000498 1994-08-16 1995-08-15 Perfectionnements relatifs a la recuperation de la gomme des bandes de roulement constituant les pneumatiques d'automobiles WO1996005039A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP95927587A EP0777561A4 (fr) 1994-08-16 1995-08-15 Perfectionnements relatifs a la recuperation de la gomme des bandes de roulement constituant les pneumatiques d'automobiles
AU31578/95A AU3157895A (en) 1994-08-16 1995-08-15 Improvements relating to reclaiming tread rubber from vehicle tyres

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPM7506 1994-08-16
AUPM7506A AUPM750694A0 (en) 1994-08-16 1994-08-16 Improvements relating to reclaiming tread rubber from vehicle tyres

Publications (1)

Publication Number Publication Date
WO1996005039A1 true WO1996005039A1 (fr) 1996-02-22

Family

ID=3782028

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1995/000498 WO1996005039A1 (fr) 1994-08-16 1995-08-15 Perfectionnements relatifs a la recuperation de la gomme des bandes de roulement constituant les pneumatiques d'automobiles

Country Status (3)

Country Link
EP (1) EP0777561A4 (fr)
AU (1) AUPM750694A0 (fr)
WO (1) WO1996005039A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000047330A1 (fr) * 1999-02-10 2000-08-17 Jet-Net International Pty. Ltd. Buse d'ejection de liquide a tres haute pression
FR2793436A1 (fr) * 1999-05-11 2000-11-17 Olivier Labroue Procede de fragmentation d'un materiau par projection d'au moins un jet fluide a ultra-haute pression et dispositif pour la mise en oeuvre de ce procede
WO2001089778A2 (fr) * 2000-05-25 2001-11-29 Cornerstone Technologies, L.L.C. Dispositif servant a fragmenter des materiaux solides au moyen d'un jet liquide commande par processeur
FR2882678A1 (fr) * 2005-03-01 2006-09-08 Serge Lambert Procede et installation de recuperation des materiaux des pneumatiques uses par jet d'eau a haute pression
WO2008084267A1 (fr) * 2007-01-10 2008-07-17 Moldovan Gyoergy Procédé pour pulvérisation fine régulée d'élastomères par extraction par jet sous ultra-haute pression
WO2018150444A1 (fr) 2017-02-14 2018-08-23 PNEUS JET RECYCLING Srl Dispositif d'interruption de pneu
IT201700122641A1 (it) * 2017-10-27 2019-04-27 Augusto Favaro Metodo e sistema per incidere uno pneumatico

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5115983A (en) * 1990-07-07 1992-05-26 D & R Recyclers, Inc. Process for recycling vehicle tires
WO1992015438A1 (fr) * 1991-03-05 1992-09-17 Richard Anthony Keers Recyclage de pneus uses
WO1992022409A1 (fr) * 1991-06-13 1992-12-23 George Veres Procede de recuperation de caoutchouc des pneumatiques de vehicules

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2142979C3 (de) * 1971-08-27 1975-03-06 Paul 4740 Oelde Hammelmann Vorrichtung zum Abtrennen und Zerkleinern des Gummis eines Kraftfahrzeugreifens mit Stahldrahtverstärkung seinlage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5115983A (en) * 1990-07-07 1992-05-26 D & R Recyclers, Inc. Process for recycling vehicle tires
WO1992015438A1 (fr) * 1991-03-05 1992-09-17 Richard Anthony Keers Recyclage de pneus uses
WO1992022409A1 (fr) * 1991-06-13 1992-12-23 George Veres Procede de recuperation de caoutchouc des pneumatiques de vehicules

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DERWENT ABSTRACT, Accession No. 64983D/36, Class A35, D41 (A95); & JP,A,56 089 538 (BAUER KOSAN KK) 20 July 1981. *
See also references of EP0777561A4 *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000047330A1 (fr) * 1999-02-10 2000-08-17 Jet-Net International Pty. Ltd. Buse d'ejection de liquide a tres haute pression
JP2002536170A (ja) * 1999-02-10 2002-10-29 ジェット‐ネット・インターナショナル・プロプライエタリー・リミテッド 超高圧液体ジェットノズル
FR2793436A1 (fr) * 1999-05-11 2000-11-17 Olivier Labroue Procede de fragmentation d'un materiau par projection d'au moins un jet fluide a ultra-haute pression et dispositif pour la mise en oeuvre de ce procede
WO2001089778A2 (fr) * 2000-05-25 2001-11-29 Cornerstone Technologies, L.L.C. Dispositif servant a fragmenter des materiaux solides au moyen d'un jet liquide commande par processeur
WO2001089778A3 (fr) * 2000-05-25 2002-05-30 Cornerstone Technologies L L C Dispositif servant a fragmenter des materiaux solides au moyen d'un jet liquide commande par processeur
US6435435B1 (en) 2000-05-25 2002-08-20 Cornerstone Technologies, L.L.C. Apparatus for comminution of solid materials using a processor-controlled liquid jet
FR2882678A1 (fr) * 2005-03-01 2006-09-08 Serge Lambert Procede et installation de recuperation des materiaux des pneumatiques uses par jet d'eau a haute pression
WO2008084267A1 (fr) * 2007-01-10 2008-07-17 Moldovan Gyoergy Procédé pour pulvérisation fine régulée d'élastomères par extraction par jet sous ultra-haute pression
WO2018150444A1 (fr) 2017-02-14 2018-08-23 PNEUS JET RECYCLING Srl Dispositif d'interruption de pneu
IT201700122641A1 (it) * 2017-10-27 2019-04-27 Augusto Favaro Metodo e sistema per incidere uno pneumatico

Also Published As

Publication number Publication date
AUPM750694A0 (en) 1994-09-08
EP0777561A1 (fr) 1997-06-11
EP0777561A4 (fr) 1997-11-05

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