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WO2008084267A1 - Procédé pour pulvérisation fine régulée d'élastomères par extraction par jet sous ultra-haute pression - Google Patents

Procédé pour pulvérisation fine régulée d'élastomères par extraction par jet sous ultra-haute pression Download PDF

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Publication number
WO2008084267A1
WO2008084267A1 PCT/HU2008/000002 HU2008000002W WO2008084267A1 WO 2008084267 A1 WO2008084267 A1 WO 2008084267A1 HU 2008000002 W HU2008000002 W HU 2008000002W WO 2008084267 A1 WO2008084267 A1 WO 2008084267A1
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Prior art keywords
extraction
workpiece
jet
previous
anyone
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PCT/HU2008/000002
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English (en)
Inventor
György MOLDOVAN
Laszlo Baliko
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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/004—Severing by means other than cutting; Apparatus therefor by means of a fluid jet
    • 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
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • 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
    • 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
    • B29L2031/00—Other particular articles
    • B29L2031/709—Articles shaped in a closed loop, e.g. conveyor belts
    • B29L2031/7092—Conveyor belts
    • 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

  • Subject of present invention is a method for production of controllable grain-size production of fine elastomer-powder by ultra high pressure liquid jet extraction, by which valuable raw materials can be produced from recyclable waste materials.
  • Background of invention In addition to considerable quantity of used rubber tyres world-wide, the quantity of different elastomer wastes without thermoplastic properties is also continually increasing. Production wastes and rejects of such products further increase the quantity of these post-consumer waste materials.
  • Cryogenic (deep-frozen state) grinding performed below glass transition point of rubber like descriptions of Lovette US 4,025,990 or Bernd DE 10357968 among others, eliminates surface oxidation, but chemical activity of product is also limited because of degrading polymer chains and the characteristic morphology of "glass-breaking" shell-like shaped surface of particles due to technology.
  • the so-called buffing technology intends to prevent the problem of metal contamination, yet the original purpose of this technology is preparation of tread-part of the usable tyre structure before re-treading.
  • Rubber material of rather acceptable purity can be obtained by mechanical buffing technology, but disadvantages of the process are the frictional heat generation and the considerable remaining rubber material on tread surface. Namely, the extraction of rubber particles should be stopped in a safe distance from the metal-cord surface, in order to prevent the metallic pollution of product. Due to this fact the cleaning of outer surface of tyre from rubber material is not perfect, while acceptable professional extraction of internal rubber material of tyre is not possible with this process for the time being.
  • tyres - in most cases tyres - can be extracted in such way that the created product would be the desirable, possibly homogenous and fine-grained powder material.
  • a returning question during evaluation of the mentioned and other known processes is the means of extracting process, namely the examination of those features which would properly create just that product quality as mentioned in these descriptions.
  • the surface of created product-grains will be typically plane-type, due to cutting effect of abrasive material, which is disadvantageous from the point of view of further utilization because of the small specific surface.
  • the aim of the invention is the realization of - production of the most achievable quantity and possibly most homogeneous fine-fraction grain, and
  • the desirable product structure is mainly below 500 micrometer, containing the most volume of achievable fine fractions.
  • the valuable process for commercial application is which is able to produce this product structure in one technological step, besides optimized energy consumption.
  • the effect of tearing phenomenon can be increased by a quick relative motion between workpiece being extracted and the liquid jet, as well as by the angle of impacting jet, and by the adjustment of active distance of the extraction.
  • the effect of tearing phenomenon can be also increased by application of a material-fatiguing pulsing-pressure liquid (similar to hammer-drill-like effect).
  • the invention is a method for extraction and a simultaneous grinding of elastomers by controlled ultra high pressure jets, where jet is aimed at the surface of the workpiece being extracted and at the same time the workpiece and the jet are in a correlative motion.
  • the correlative motion between controlled jet and the workpiece being extracted is a planar vibrating motion in such a way that the plane of vibration is perpendicular to the forward movement of the workpiece and simultaneously it has an inclination of 0 to 15 degrees to a perpendicular drawn on the surface of the workpiece (in case of a spatial surface, e.g. a toroid/torus surface the perpendicular is drawn on the actual tangent of the surface).
  • the vibrating movement is realized by the movement of the nozzle of jet, while in other cases it may be more suitable to realize the vibrating motion by movement of the workpiece being extracted.
  • the forward motion can be also made by the extracting jet.
  • a fine grinding is also accomplished in such a way that the characters of extracting-grinding process are adjusted to previously planned and calculated values, regardless the appearance shape of the workpiece (ring, belt, tyre etc.).
  • the jet-affected part of the workpiece is firmly supported in order to eliminate the compensation effect that originates from the flexible structure of the workpiece. It is an important feature of the invention that the motions of jets are directly aimed at the extraction area of the workpiece.
  • the utilized liquid namely the water in given case is partly or completely re-circulated and the returned liquid is to be cooled to the temperature acceptable for continuous operation of the high-pressure pump (in case of water it is 17-28 degrees centigrade).
  • a further important character of the method is that for adjustment of extracting-grinding parameters the pressure of liquid is understood at the place of extraction (the bottom of the jet). Together with the former features it is also important to perform the extraction with an optimum diameter range of extracting jet between 0.05 mm (0.002") and 0.5 mm (0.02").
  • a further important character of the method according to the invention is that the extracting jets are vibrated in a linear way over the aimed area at a constant frequency between 250/min and 1250/min.
  • the extracting jets are vibrated at amplitude that characteristically corresponds to the distance between the in-lined nozzles at its minimum, and the forward movement of workpiece is set at a value conveniently adjusted to vibration frequency.
  • the extracting energy of the liquid jet is set at a value which is adjusted to tearing energy of elastomer.
  • a practical utilization of our invention is to adapt the method for direct re- processing of factory rejects in such a way, that for the further optimization of extracting parameters the tearing energy is directly specified with a tearing test of the own manufactured material.
  • volume and pressure of the liquid-flow and such way the capacity of high-pressure pump is set at the value, which is calculated from the tearing energy; furthermore adjustment of the pump capacity is made with consideration of nozzle diameters and the number/quantity of nozzles, namely tuning with the nozzles.
  • the jet is inclined with an ⁇ degree to a perpendicular drawn to the workpiece. It is advantageous in every case of application of the method, if the actual distance between extraction head and workpiece is continuously optimized by a control system.
  • the quality of product can be further improved applying a low-powered soft post-crumbling, but not causing degradation of polymer structure; whereby an additional fining of the in-material pre-split grains is to be carried out.
  • Figure 1 introduces the working area of extraction
  • Figure 2 a-c shows a practically-known nozzle-line arrangement in three views
  • Figure 3 we introduce the main movements of extraction on a sketchy top-view of working area;
  • Figure 4 shows the geometric relationship of forces affecting the attack-point of the workpiece in case of inclined extracting jet;
  • Figure 5 shows the control system for optimization of distance between extraction head and the workpiece
  • Figure 6 shows a typical appearance of conventional mechanically-ground rubber grains, taken by a scanning electron microscope (SEM);
  • Figure 7 shows a typical appearance of rubber grains produced by the present method, taken by a scanning electron microscope (SEM).
  • Material extraction will take place where workpiece is opened at least one direction, because extraction of the material piece, which is surrounded by other material parts will be blocked by surrounding "supporting" material elements. Beside this basic condition the extraction is also promoted by the fact that material faults in elastomers are typically in the range of 10 "2 mm, thus these faults can be the local starting points of extraction with a conveniently selected diameter of extracting jet of a similar range.
  • the vibrating motion may be performed by workpiece and feeding motion by the simultaneously vibrating jet, but effective extraction will occur also on the workpiece performing a simultaneous transversal vibrating and longitudinal forward/feeding movement under stationary jet.
  • Determination of extraction parameters The necessary power need for extracting-grinding of elastomers may be conveniently determined from strength characteristics of a given elastomer. The extraction can be considered successful in that case if the transmitted influence exceeds the material strength.
  • V kr is the critical average speed of the jet, which is necessary for the fracture to be created in the workpiece; with other words the minimum average speed of the jet, which is necessary for extraction of a material with given parameter.
  • the in-material penetration depth of jet which can be characterized with above parameters, can be determined with the kinetic work of jet. Also assuming quasi-stationary flow for the inspected environment, the kinetic work of jet:
  • the t is time interval, till the jet performs extraction of an element from the workpiece. This time can be determined from the transversal vibration of jet as follows.
  • Utilizing the jet diameter IR discrete position of extraction can be determined along the L amplitude. Time-period of one extracting position from this
  • Size of material element extracted in the size of depth of above determination will be characteristic to the average extracted grain size.
  • the status of "average” should be emphasized due to the fact that because of inhomogeneous cross-linked structure of elastomers and their incorporated material faults smaller and bigger size of grains may also be extracted during the process.
  • the relative forward speed between the workpiece and jet has a special importance because dwelling period of jet in a given extraction zone can be controlled also by the forward/feeding speed. That is extracting depth, namely product yield of extracting process can be controlled also by this way.
  • Repetition of the jet, which periodically attacks the workpiece in the extraction zone can be expressed with the ratio of the longitudinal and transversal movement-period. Namely the number of extraction takings:
  • the optimum production target parameters of a given elastomer such as the necessary local pressure for extraction, the desired average extraction grain size and the extraction depth to be reached by one forward movement can be determined from a reproducibly measurable character of tearing energy with the help of parameters taken up from practical considerations, like diameter, forward speed, vibration frequency and amplitude of extraction jet.
  • Diameter of extraction jet For determination of jet diameter the main points to be considered are the followings. From the point of view of capacity optimization of pump, which demands extremely big driving power for generation of working pressure, it is expedient to increase the mass flow (namely the nozzle diameter) in parallel with decreasing the flow speed (namely the pressure of pump). This may result considerable saving of costs in both investment and operation.
  • jet diameter is a characteristic determinant of product fineness to be extracted .
  • Vibrating movement of jets is very convenient also from the point of view that even those particles of liquid that do not perform extraction would contribute fatigue stressing of material due to their cyclic presence, thus promoting the extraction effect of the next (following) jets. (It should be remarked that the referred pulsing flow-supply of plunger-type high-pressure pumps causes further fatigue stress effect.)
  • the lowest limit of jet vibration frequency is determined by the fact that in case of decreasing frequency the dwelling time of extracting jet is longer, thus the deeper penetration causes more coarse extracted grains. According to our experiences, fine fraction of an acceptable quantity can be obtained at the vibration frequency above 250/min.
  • the extracted grain size will be finer by increasing jet vibration frequency, but frequency increasing over a certain value will considerably boost the construction and maintenance technical costs. According to our experiences the production and maintenance costs of jet vibration over 1250/min are not rational/proportional to the value of created product.
  • the convenient vibration amplitude of jet is equal to or slightly (with maximum a nozzle-diameter) more than the distance between in-line nozzles. It can be secured in this way that no omitted workpiece area would remain between the aligning extractions and each jet mainly affects the area to be newly extracted.
  • Lower limit of amplitude-influencing nozzle distance would result from material strength characteristics and sizes of applicable high pressure nozzles, and it comes in the range of 7-8 mm (0.3").
  • Theoretical upper limit of amplitude can be determined from the desired and extractable grain size. It can be seen from the relationships above that keeping the frequency unchanged and simultaneously increasing the amplitude, the dwelling time of jet would decrease, namely the grain size will acquire refinement. It can be conceivable however, that there are technological limits of such implementation.
  • the most applicable pumps for jet extraction are the plunger pumps.
  • One of the most important characteristic of these pumps is that they are designed for a given pressure and flow value and resulting from their construction they can be controlled in an extremely limited range. Therefore one should control them not at pump side, but rather at discharge point, with the fine tuning of the nozzle-line.
  • it can be realized in the way of forming one or more nozzle- spaces on nozzle-line (conveniently at the end of the nozzle-line), where one or more nozzles will not take place in extraction.
  • the role of these nozzles is definitely the fine tuning of the flow characteristics (pressure, flow volume).
  • the extracting F force vector can be divided into two components; an F m force component perpendicular to surface of workpiece and an F t force component, which is parallel with the surface of workpiece. Function of these two force components is basically different.
  • the F m component will perform the extraction, but in respect of effective extraction the Ft component has also an important role.
  • the characteristic elastic property of elastomers is principally due to chain molecules of great elasticity, yet elasticity is also affected by the characteristics of cross-links.
  • the chain molecules in standstill state of elastomer are inordinate, having a clew/ball-like shape. Upon influence of an outside pulling force the chain molecules will unwind, become tightened. This 02
  • F f is tangential component necessary for elastic elongation
  • A R 2 ⁇ is area of jet Determination of F t :
  • F, F sma or in scalar form
  • F f F sina
  • Figure 5 shows a possible control system for optimal adjustment and control for distance between nozzle and workpiece.
  • the 501 marker control unit produces the 502 transmission signal, which is transmitted by the 503 combined distance-monitoring transmitter-receiver to the surface of 504 constantly forwarding 505 workpiece.
  • the 506 monitor signal returns from the surface and goes through the 507 signal amplifier and 508 signal conditioning and digitizing unit, arriving at 509 extraction head position base-signal generator and real-time position analyzer that produces base-signal for positioning of extraction head and analyzes the head position in real time.
  • the 511 extraction head position controller by means of 512 extraction head positioning mechanism will complete the optimized 514 positioning of 513 extraction head to actual surface character of 505 workpiece.
  • the actual extraction- distance position of workpiece (that is perpendicular to surface of workpiece) can be measured continuously, compared to the pre-set head-position base signal.
  • Distance between nozzle-plane (plane of discharging edges of nozzles) and workpiece can be composed from real-time measurement with consideration of necessary technological distance.
  • Extraction head can also be adjusted by real-time control to the momentary surface position of workpiece.
  • the introduced method of jet extraction as mastication process Mastication is a well-known process in the rubber industry. This is a kind of devulcanization process created by intensive mechanical work, namely reversing the thermoset elastic state into moldable, plastic state mainly through rupture of double bonds. The material resulting from mastication process has improved chemical bonding properties. Conventional means of masticaton are roll mills, high shear mixers or extruders transmitting intense mechanical forces.
  • Another desirable property of the product is such a surface morphology that promotes its highest possible grade of chemical bonding activity, thus assuring the chemically stable integration into newly-produced polymer matrices.
  • a product with such properties represent remarkable added value, because through its utilization the ratio of usually expensive chemical-bond improving surface modifying and compatibility promoting materials can be considerably decreased in polymer compounds.
  • production cost of final product which may contain jet- extracted product in higher ratio than other known crumbs, can be remarkably decreased.
  • the product is an "intelligent" additive just by itself in various polymer systems.
  • a unique property of the introduced jet-extracted product is that it is directly suitable for revulcanization without devulcanization, namely manufacturing of new product, even solely from itself.
  • the powder nevertheless shows very good compatibility with different types of polymers. It has been proven in the course of laboratory and factory application tests and trial productions that in those mother batches that utilized jet-extracted powder considerably less quantity of compatibilizer, curing agent or plasticizer were necessary compared to utilization of mechanical or cryogenic products. According to wide-range laboratory and industrial application tests the proper formulation of fine rubber powder below 500 micrometers can be successfully applicable not only for rubber-base systems, but also as reactive additive for PVC/CPE and HDPE or LDPE thermoplastic elastomer systems. It is a further advantage of the produced mixtures that they can be processed on standard equipment with commonly applied technologies of the rubber and plastics industries (calandering, injection molding, continuous extrusion).
  • the powders of high-fineness (below 200 micrometer) can be further beneficially used as elastic fillers of thick coating systems with good chemical and corrosion-proof properties, as well as fillers of elastic paints.
  • Rubber bitumen systems Rubber bitumen systems
  • Rubber bitumen is made from bitumen, rubber crumb and certain additives. Production of rubber bitumen utilizing rubber crumbs made by mechanical or cryogenic grinding requires special transportation and processing systems. Contrary to conventional rubber bitumen systems the rubber bitumen produced with jet-extracted rubber powder is chemically and physically stable, therefore its processing can be performed by conventional bitumen-transporting and processing systems. Increasing of fine product yield of the process
  • micro-ruptures can be observed also on the surface of product made by jet-extracting. If the product is subjected to such low-power soft post- crumbling that would not cause degradation of surface polymer structure (namely it maintains the properties of the original material), then further separation of pre-ruptured grains, namely fining of grain sizes can be promoted. This post-crumbling is especially successful in case of internal butyl rubber (isobutylene-isoprene rubber) of modern tyres and other polymers with similar physical properties and rheology, but it improves the fine-grain ratio even in case of different polymers.
  • Advantages related to the invention are especially successful in case of internal butyl rubber (isobutylene-isoprene rubber) of modern tyres and other polymers with similar physical properties and rheology, but it improves the fine-grain ratio even in case of different polymers.
  • Another advantage of the method that it can be adapted well for processing of workpieces with such shape or structure that cannot be processed by conventional shredding-grinding methods.
  • Such are for example vulcanized rubber parts reinforced with strong metal frame, where metal structure would not allow mechanical grinding.
  • the extracting-grinding is further promoted by the warming of liquid transportation between high-pressure pump and nozzles, which, in case of applied pressure level for water working medium may reach even 40-50 degrees centigrade, plus the local heat generation of workpiece-attacking jet. These heat effects jointly contribute to increasing of viscous elasticity of the workpiece, thus promoting the efficiency of the method.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

L'invention concerne un procédé pour production de poudre d'élastomère à activité de surface élevée et à granulométrie régulée par extraction et broyage simultané au moyen d'un jet de liquide à pression ultra-élevée. Le procédé est caractérisé principalement en ce que des paramètres technologiques spécifiques du processus d'extraction, tels que la valeur limite d'extraction de la pression du jet de liquide, ainsi que des paramètres caractéristiques de position et de déplacement corrélés entre le jet de liquide et la pièce extraite, doivent être déterminés à partir de l'énergie de déchirure de l'élastomère à extraire.
PCT/HU2008/000002 2007-01-10 2008-01-09 Procédé pour pulvérisation fine régulée d'élastomères par extraction par jet sous ultra-haute pression Ceased WO2008084267A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HU0700019A HUP0700019A2 (en) 2007-01-10 2007-01-10 Method for regulable fine-milling of elastomers by high pressure water jet
HUP0700019 2007-01-10

Publications (1)

Publication Number Publication Date
WO2008084267A1 true WO2008084267A1 (fr) 2008-07-17

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HU (1) HUP0700019A2 (fr)
WO (1) WO2008084267A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010007455A3 (fr) * 2008-07-17 2010-04-01 Moldovan Gyoergy Équipement de broyage fin ajustable de bandages de roue et d'autres matières élastiques par un procédé à jet de liquide sous ultra-haute pression
WO2016087884A1 (fr) 2014-12-05 2016-06-09 Hungarojet Iparí És Szolgáltató Kft. Procédé et appareil pour produire un élastomère broyé
WO2018150444A1 (fr) 2017-02-14 2018-08-23 PNEUS JET RECYCLING Srl Dispositif d'interruption de pneu
CH714352A1 (fr) * 2017-11-17 2019-05-31 Tyre Recycling Solutions Sa Machine pour le recyclage des pneus.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996005039A1 (fr) * 1994-08-16 1996-02-22 Cmht Technology (Australia) Pty. Ltd. Perfectionnements relatifs a la recuperation de la gomme des bandes de roulement constituant les pneumatiques d'automobiles
WO2001053053A1 (fr) * 2000-01-14 2001-07-26 Regum Kft Procede de recuperation selective de composants a partir d'une matiere-dechet elastique multicomposee, et appareil de production d'une poudre de caoutchouc a grains fins
US20040230412A1 (en) * 2003-05-14 2004-11-18 Morman Kenneth Nero Method and apparatus for predicting belt separation failure in aging tires by computer simulation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996005039A1 (fr) * 1994-08-16 1996-02-22 Cmht Technology (Australia) Pty. Ltd. Perfectionnements relatifs a la recuperation de la gomme des bandes de roulement constituant les pneumatiques d'automobiles
WO2001053053A1 (fr) * 2000-01-14 2001-07-26 Regum Kft Procede de recuperation selective de composants a partir d'une matiere-dechet elastique multicomposee, et appareil de production d'une poudre de caoutchouc a grains fins
US20040230412A1 (en) * 2003-05-14 2004-11-18 Morman Kenneth Nero Method and apparatus for predicting belt separation failure in aging tires by computer simulation

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010007455A3 (fr) * 2008-07-17 2010-04-01 Moldovan Gyoergy Équipement de broyage fin ajustable de bandages de roue et d'autres matières élastiques par un procédé à jet de liquide sous ultra-haute pression
WO2016087884A1 (fr) 2014-12-05 2016-06-09 Hungarojet Iparí És Szolgáltató Kft. Procédé et appareil pour produire un élastomère broyé
EP3159128A1 (fr) 2014-12-05 2017-04-26 Aquajet Zrt. Appareil de production d'élastomère broyé
WO2018150444A1 (fr) 2017-02-14 2018-08-23 PNEUS JET RECYCLING Srl Dispositif d'interruption de pneu
CH714352A1 (fr) * 2017-11-17 2019-05-31 Tyre Recycling Solutions Sa Machine pour le recyclage des pneus.

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Publication number Publication date
HU0700019D0 (en) 2007-03-28
HUP0700019A2 (en) 2008-09-29

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