WO2001007243A1 - Direct tyre retreading - Google Patents
Direct tyre retreading Download PDFInfo
- Publication number
- WO2001007243A1 WO2001007243A1 PCT/GB2000/002828 GB0002828W WO0107243A1 WO 2001007243 A1 WO2001007243 A1 WO 2001007243A1 GB 0002828 W GB0002828 W GB 0002828W WO 0107243 A1 WO0107243 A1 WO 0107243A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- inlet
- moulding
- moulding cavity
- mobile mould
- article
- Prior art date
Links
- 239000000463 material Substances 0.000 claims abstract description 136
- 238000000465 moulding Methods 0.000 claims abstract description 88
- 230000009969 flowable effect Effects 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 35
- 238000002347 injection Methods 0.000 claims description 52
- 239000007924 injection Substances 0.000 claims description 52
- 239000011159 matrix material Substances 0.000 claims description 47
- 229920001971 elastomer Polymers 0.000 claims description 43
- 239000005060 rubber Substances 0.000 claims description 43
- 238000007789 sealing Methods 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 4
- 229920001169 thermoplastic Polymers 0.000 claims description 4
- 239000004416 thermosoftening plastic Substances 0.000 claims description 4
- 239000011236 particulate material Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 229920001187 thermosetting polymer Polymers 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000010410 layer Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010525 oxidative degradation reaction Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000003039 volatile agent Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/52—Unvulcanised treads, e.g. on used tyres; Retreading
- B29D30/58—Applying bands of rubber treads, i.e. applying camel backs
- B29D30/62—Applying bands of rubber treads, i.e. applying camel backs by extrusion or injection of the tread on carcass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/1459—Coating annular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
Definitions
- the present invention is concerned with apparatus and methods of forming on a surface of an article a moulding from flowable material, and particularly for effecting a retreading of a tyre directly on a tyre casing.
- tyre retreading Two particularly widely used techniques are Cold Capping and Hot Capping.
- a precured (i.e. vulcanised) tread having a surface pattern is applied to a prepared tyre casing (i.e. a tyre which has been machined down to a predetermined size and any irregularities, e.g. pits or hollows, repaired) with a layer of uncured cushioning rubber separating the two.
- the arrangement of tyre tread, rubber cushioning and tyre casing held together in a tyre press is then autoclaved, curing (i.e. vulcanising/cross-linking) the cushioning rubber and bonding the tyre casing and tread.
- a tread (having no surface pattern) is extruded (i.e. is un-cured), is applied to a prepared tyre casing and the tyre casing and tread is then moulded in a heated tyre press to form a tread pattern and to cure the tread, bonding it to the tyre casing.
- Each technique has its advantages and disadvantages - cold capping enables a retreader to minimise capital investment by purchasing precured treads from suppliers, whereas hot capping requires greater capital investment but reduces the cost of consumables by not requiring the purchase of precured treads.
- the predominant process cost is the time taken to heat the rubber in a tyre press to effect curing, which effectively determines the number of tyres which can be retreaded per tyre press per hour - heat must be conducted through a rubber layer about 20 mm thick to raise the temperature (typically from less than 80 °C) to about 160 °C, which is a slow process since rubber is an extremely good insulator. This means that a typical curing time (for either process) is 60-90 minutes.
- US 4583928 requires that a series of arcuate sections of a tyre casing have mouldings formed on them, one after the other, each moulding being cured before the next is made. This is particularly slow and provides a series of potentially weak weld lines.
- US 4139592 allows for the simultaneous use of a series of injectin ports locates across the equatorial plane of a moulding cavity to form a tread on a tyre casing. The specific positioning (on the equatorial plane) of the injection ports and their relative position forms an essential element of the invention, preventing the formation of weak weld lines. Curing advantageously takes place while the tyre is still in the injection mould (column 6 lines 20-27).
- the present invention overcomes the prior art disadvantages, allowing for tread formation directly on a tyre casing, reducing the effort required in preparing tyre casings, and reducing the time required for curing.
- curing can take place separately from the tread forming apparatus (below), allowing optimum usage of the tread forming apparatus and helping to reduce the capital investment per tyre retreaded per hour.
- treads can be formed on mould assemblies, allowing for the advantages of the separate curing step (above). The treads can subsequently be removal from the mould assemblies and used for cold or hot capping.
- a moulding from flowable material comprising the steps of:
- a mobile mould matrix and material inlet having (i.e. defining) at least one inlet channel to form a moulding cavity defining a first volume, the material inlet being displaceable relative to the surface and the mobile mould matrix;
- the material inlet and forming member may define a side wall of the moulding cavity. In the case of cylindrical or toroidal articles, this would not be an equatorial plane such as a tyre surface.
- the filling of the mould cavity of step (ii) may be effected simultaneously about the circumference (i.e. the perimeter) of the article. The provision of simultaneous injection minimises the potential for formation of weak interfaces. Forming is completed by step (iv). In the embodiments of the invention below, pressures in the mould cavity are predicted to reach a maximum of 8 MPa (80 bar) and therefore a rigid support structure for the apparatus defining the mould cavity is necessary, preferably a segmented one in order to enable easy removal.
- the curing of flowable materials can be a slow and time-consuming process which significantly affects the economics of a manufacturing process.
- the material inlet By displacing the material inlet from the mobile mould matrix and the surface and replacing it with a forming member, the material inlet (and the system which supplies flowable material to it) is free to be used in another moulding process whilst curing takes place. Since the material inlet and the material supply system connected to it comprise typically the most expensive part of the apparatus used in the moulding process, this can lead to a very substantial reduction in the cost of apparatus required per moulding produced per hour. It also means that as soon as the moulding cavity has been filled and the material inlet replaced by the forming member, the flowable material can be cured, avoiding unnecessary cooling.
- step (iii) Displacement of the material inlet relative to the mobile mould matrix causes a break in the flowable material linking them. This may be aided by the use of a cutting tool.
- the exposed flowable material of step (iii) may be manipulated prior to contacting it with the forming member. For example, exposed rubber could be rolled down to contact an exposed surface of a tyre casing.
- the article on whose surface the moulding is to be formed may be of any desired shape, and similarly the mobile mould matrix, material inlet and forming member may be appropriately shaped.
- the invention is particularly useful in forming mouldings as annular layers on toroidal or cylindrical cores.
- the invention may be used for moulding tyre treads onto tyre casings.
- the flowable material may be any material which can be made to flow into the moulding cavity, for example materials such as rubbers or thermoplastics in the melt state, thermosetting resins such as polyurethane in the melt state, or particulate materials which are able to flow.
- materials such as rubbers or thermoplastics in the melt state, thermosetting resins such as polyurethane in the melt state, or particulate materials which are able to flow.
- the material inlet is displaced the flowable material at the inlet should be in a sufficiently viscous state to prevent its escape.
- the overall process time can be reduced significantly, although of course a subsequent capping step may be employed where necessary.
- the separation of the curing step from the moulding step means that a number of mouldings can be simultaneously cured.
- the at least one inlet channel of the material inlet may be shaped so that at the point at which material enters the moulding cavity, it has a reduced cross-section. This causes the rate of flow per unit area to be greater than that in the rest of the material inlet, increasing pressure temporarily, generating deformation energy and heating the flowable material as it enters the moulding cavity. Prior to the reduced cross-section area of the inlet channel, the pressure drop and temperature increase is small, minimising the danger of premature corsslinking and permitting pauses in manufacture without cleaning down of the apparatus being necessary. This forms a further aspect of the present invention.
- injection moulding apparatus for flowable settable material in which work done on the flowable material causes its temperature to be elevated sufficiently to set it (i.e.
- the work done on the flowable material may be by injection force against flow resistance.
- the material inlet may comprise a plurality of radially disposed inlet channels. Alternatively, it may comprise at least one inlet channel defining a substantially continuous inlet channel around the whole of said material inlet. For example, there may be a single continuous inlet channel about the whole of the material inlet. This provision of a single inlet channel provides a number of substantial advantages over the prior art devices.
- the elevated temperature of the flowable material at the start of the curing process results in a shorter curing process time and may additionally improve the performance and wear life of the moulding (e.g. tyre tread) - high temperatures are conducive to oxidative degradation and so the longer that the surface layer of the moulding is held at a high temperature, the more oxidative degradation will occur, and vice versa.
- the moulding e.g. tyre tread
- the rate of flow of material through the material inlet may be varied as the moulding cavity is filled. For example, it may be reduced for the final material to enter the moulding cavity. This can be used to prevent excessive heating and curing (crosslinking) of residual material in the material inlet, particularly between cycles.
- a pressure sensor e.g. transducer
- pressure switch may be used to determine the pressure being placed upon the flowable material and to stop filling of the moulding cavity when a predetermined level of pressure is reached. This is particularly useful since it means that a variable volume of material may be introduced to the moulding cavity to fill it - in the case of tyre casings, this means that their surface need not be uniform and may e.g. contain pits or hollows.
- This tolerance of flaws in the surface of the tyre casing can reduce the cost of preparing a tyre casing for retreading and may also allow tyre casings to be retreaded which, due to surface deformation, would not be suitable for retreading using existing techniques such as hot or cold capping.
- the material inlet may form a side of the moulding cavity.
- the material inlet may form a tyre-edge side of the moulding cavity.
- the material inlet may have e.g. an overall radial shape, allowing filling from all around an article such as a tyre casing. Since a tyre tread will have a patterned outer (circumferential) surface, this provides the advantage that displacing of the material inlet will not affect the patterned surface being formed.
- Also provided according to the present invention are apparatus for forming on a surface of an article a moulding from flowable material, comprising a mobile mould matrix, material inlet and forming member, the material inlet being displaceable relative to the mobile mould matrix and the article.
- the apparatus may additionally comprise at least one support member for the article - in the case of forming a tread on a tyre casing, the pressures required to form the moulding would cause deformation of the tyre casing and so the provision of a support member (or support members) prevents any deformation from occurring.
- the material inlet may additionally comprise a material injection system, for example comprising a screw pre-plasticisation unit into which is fed the flowable material in the solid state, the plasticised flowable material being forced into an injection cylinder from where a hydraulic injection ram actuator exerts force on it, causing it to fill the moulding cavity.
- the injection cylinder may be heated.
- the material injection system may be desirable to be able to use the material injection system to form a range of mouldings, e.g. different tyre treads on different sized tyre casings, using a range of mobile mould matrixs and material inlets.
- the material inlet may be removably attached to the material injection system.
- the forces required to cause the flowable material to fill the moulding cavity and to subsequently form the moulding may be quite substantial - in the case of retreading a tyre casing using a rubber, a maximum force of about 12 MPa, and an average force of about 4.5 MPa, has to be exerted upon the material.
- the mobile mould matrix must be capable of withstanding such forces - each quadrant of a mobile mould matrix and forming member used to exert 4.4 MPa of pressure in forming a tyre tread on a tyre casing will have approximately 98 tonne of opening pressure force exerted upon it.
- the mobile mould matrix may comprise a segmented mould which is joined together to define the inner shape of the mobile mould matrix, i.e. that which will define the moulding cavity.
- a retaining ring may be placed around the segmented mould and a cam or cams attached to allow it manipulation.
- a support assembly may also be used to provide mechanical support for the mobile mould matrix, particularly for holding the edge forming member in place and exerting sufficient force upon it.
- the present invention also provides a method of forming from flowable material a moulding on a surface of a toroidal or cylindrical article having at least one side wall, comprising the steps of:
- a mobile mould matrix having either one continuous inlet on the side wall or a plurality of discontinuous inlets along the length of the side wall, and simultaneously contacting the inlet or each of the inlets with an injection port, the mobile mould matrix and the injection ports defining a moulding cavity;
- Such a toroidal or cylindrical article could be a tyre casing.
- the point of injection into the side wall could be anywhere on the side wall.
- Figure 1 shows cross-sectional views of a mobile mould matrix, material inlet and article (tyre casing) whilst the moulding cavity is being filled ("fill step") ( Figure la) and when the material inlet is displaced to sever the connection with the moulding cavity ("crop " ' step) ( Figure lb).
- Cross-hatched area indicates the cross-section of circular inlet channel 131 ;
- Figure 2 shows ( Figures 2a and 2b) support members forming a support assembly for a tyre casing
- Figure 3 shows the tyre casing support assembly of Figure 2, the tyre casing being contacted by edge forming member and mobile mould matrix;
- Figure 4 shows the arrangement of Figure 3, together with a material injection system, a datum/support for the apparatus, and an actuator for controlling filling and displacing the material inlet.
- Figures 5 shows ( Figures 5A-5C) an alternative material inlet arrangement in use
- Figure 6 shows ( Figures 6A and 6B) another alternative material inlet arrangement, having material injection ports; and Figure 7 shows the embodiment of Figures 5A-5C in use.
- moulding apparatus 10 for forming a moulding on the outer surface of tyre casing 20 from rubber 1 1 comprises support members 30, 31, 32, 33 (also labelled “A” in the Figures) and 40, 41 , 42, 43 (also labelled “B “ in the Figures) for tyre casing 20, support members 30-33, 40-43 being held in place by locking/mounting ring 50 (also labelled “C “ in the Figures).
- Mobile mould matrix 60 comprises segmented mould 70 having heater elements 80, 81, 82, 83 and retaining ring 90 (also labelled "E” in the Figures) which holds segmented mould 70.
- Cams 100 is shown in a first embodiment ( Figures 1-4).
- Material inlet 110 comprises control ring 120 and circumferential inlet 130 having inlet channel 131.
- Mobile mould matrix 60, casing 20 and material inlet 110 together define moulding cavity 140 having a first volume.
- mobile mould matrix 60 and heated forming member 230 together define moulding cavity 140 having a second volume.
- Inlet channel 131 has a reduced cross-sectional area at the point at which rubber 11 will enter moulding cavity 140. The first and second volumes of mould cavity 140 are equal.
- Circumferential inlet 130 is removably attached to material injection system 150 which comprises pressure transducers 151, 152, injection cylinder 160 having heater 161, screw pre-plasticisation unit 170 and hydraulic injection ram actuator 180.
- Support plate 190 acts as a datum for the apparatus as a whole, ensuring the correct positioning of material inlet 110 and mobile mould matrix 60.
- Control ring 120 is attached to actuator 200.
- Forming member 230 (also labelled “D” in the Figures) contacts mobile mould matrix 60 and has heater elements 220, 221.
- a tyre casing 20 is prepared for retreading by inserting support members 30-33 and then support members 40-43.
- Support members 30-33 widen as the radius increases, and support members 40-43 narrow as the radius increases giving tapered junctions between them.
- Locking/mounting ring 50 is then placed into the orifice defined by support members 30-33 and 40-43, locking them in position and providing means for subsequently mounting tyre casing 20.
- support members 30-33 and 40-43 and locking/mounting ring 50 are arranged to redistribute radially acting forces in the circumferential direction.
- support members 30-33, 40-43 are arranged to redistribute forces mainly on the side of material inlet 110 where high forces are exerted.
- Tyre casing 20 is then contacted by mobile mould matrix 60, which is positioned by referencing locking/mounting ring 50 using cams 100, 101.
- cams 100,101 in bringing together mobile mould matrix 60 and material injection system 150 results in the edge of inlet 130 contacting casing 20 and the force exerted being transmitted across casing 20 to press the edge of mould 70 against casing 20.
- a positive sealing force is exerted against the rubber pressure without affecting any other aspect of the filling operation.
- material injection system 150 and inlet channel 131 are charged with rubber 11 ready for supply to moulding cavity 140 when it has been formed.
- Actuator 200 positions control ring 120 over inlet channel 131 to prevent escape of rubber 11, pre-plastication unit 170 is activated and rubber 1 1 in the solid state is fed into it. The deformation energy exerted upon solid rubber 11 is converted into heat, sufficient to change the rubber 1 1 into a plastic/melt state.
- air is vented and injection ram actuator 180 exerts a small back pressure and is forced back (i.e. is retracted) by rubber 1 1.
- material injection system 150 and material inlet 131 are charged and ready to fill moulding cavity 140.
- Rubber 1 1 is kept in the plastic/melt state by heater 161.
- the assembly of tyre casing 20 and mobile mould matrix 60 is then contacted with material inlet 1 10, control ring 120 being simultaneously retracted by actuator 200 and opening inlet channel 131, thus defining moulding cavity 140.
- Material inlet 110 is connected to material injection system 150, which also contacts locking/mounting ring 50 to ensure correct positioning of tyre casing 20 and mobile mould matrix 60 relative to material inlet 110.
- Ram actuator 180 then forces rubber 1 1 out of material injection system 150, through inlet channel 131 and into moulding cavity 140. Flow resistance caused by the reduced cross-section part of inlet channel 131 causes deformation energy to be generated, heating rubber 1 1 as it enters moulding cavity 140. Heaters 80, 81. 82, 83 heat mobile mould matrix 60 and moulding cavity 140. Once ram actuator 180 has been extended by at least a first predetermined amount, meaning that about 0.5 litres of rubber is needed to complete filling, the rate of extension of ram actuator 180 is reduced in order to reduce the heating of the final rubber 1 1 to enter moulding cavity 140.
- ram actuator 180 has been extended by at least a second predetermined amount and transducers 151, 152 detect a pressure of at least a predetermined amount.
- moulding cavity 140 has been filled with rubber 1 1.
- Actuator 200 is then extended, causing control ring 120 to lift mobile mould matrix 60 away from circumferential inlet 130 and simultaneously closing inlet channel 131, severing the flow of rubber from material inlet 110 (i.e. circumferential inlet 130) into moulding cavity 140.
- Cams 100, 101 then displace material inlet 110 relative to mobile mould matrix 60 and the outer surface of tyre casing 20, leaving exposed rubber 1 1.
- Inlet channel 131 and material injection system 150 may once again be charged with rubber 1 1.
- Mobile mould matrix 60 and the outer surface of tyre casing 20 are then contacted with forming member 230 to form moulding cavity 140 defining a second volume and causing the exposed rubber 11 to contact the outer surface of tyre casing 20.
- the rubber 11 is then cured by heating it using heaters 231, 232, 80-83. Forming (shaping) has already been completed.
- control ring 120 In a second embodiment ( Figures 5A-5C, 7), a more robust and mechanically simpler apparatus is provided.
- the use of the apparatus is extemely similar to that of the previous embodiment.
- control ring 120, support plate 190 and actuator 200 do not form part of the second embodiment.
- Control ring 120 is replaced by an extended circumferential inlet 130, which additionally comprises high temperature thermoplastic seal 300.
- Heater 161 and transducers 151 , 152 are not shown.
- the tyre casing 20 is prepared for retreading as before with support members 30-33, 40-43 and locking/mounting ring 50.
- Mobile mould matrix 60 is placed around casing 20.
- the inlet apparatus differs significantly from those of Figure 1, not having control ring 120 and related actuating and supporting means, simplifying the apparatus significantly.
- Inlet 130 is extended in size, obviating the need for control ring 120.
- Inlet 130 is also provided with high temperature thermoplastic seal 300 which is slightly deformable (without affecting the surface of the tyre tread to be formed) and ensures a sealing of mould cavity 140 whilst making the sealing a more mechanically tolerant process.
- Mobile mould matrix 60 and the outer surface of tyre casing 20 are then contacted with forming member 230 to form moulding cavity 140 defining a second volume.
- forming member 230 In order to prevent deformation of rubber 1 1 resulting from expansion of volatiles in rubber 11 this should be done within two minutes (preferably less) from the removal of material inlet 110.
- the rubber 11 is then cured by heating it using heaters 231, 232, 80-83. Forming (shaping) has already been completed. Whilst this forming and curing step takes place, material inlet 110 can be used in a subsequent retreading process with a different tyre casing 20 and mobile mould matrix 60.
- a series of 12 injection ports 401-412 are used to simultaneously inject rubber 11 into moulding cavity 140 through inlets 421-432.
- the method of operation is exactly the same as for Example 2, except that upon removel of intection ports 401-412 from inlets 421-432 of mobile mould matrix 60, inlets 421-432 are then filled with sealing plugs 441-452. Rubber 11 is then cured.
- Inlet channel 131 actually comprises circular distribution channel 460 to which rubber 11 is fed from injection cylinder 100 by radial feed channels 461-464.
- Sections 471,472,473,474 are blocked sections of circular distribution channel 460 which prevent the creation of regions of stagnation.
- Positions 480 are regions of convergent flow where viscous heating is substantially uniform.
- adjacent injection ports are paired up, each pair being fed by one of six radial feed channels 490.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00946197A EP1198342A1 (en) | 1999-07-24 | 2000-07-21 | Direct tyre retreading |
JP2001512096A JP2003505271A (en) | 1999-07-24 | 2000-07-21 | Direct regeneration of tire tread |
AU60070/00A AU6007000A (en) | 1999-07-24 | 2000-07-21 | Direct tyre retreading |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9917364.3 | 1999-07-24 | ||
GBGB9917364.3A GB9917364D0 (en) | 1999-07-24 | 1999-07-24 | Direct tyre retreading |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001007243A1 true WO2001007243A1 (en) | 2001-02-01 |
Family
ID=10857851
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB2000/002828 WO2001007243A1 (en) | 1999-07-24 | 2000-07-21 | Direct tyre retreading |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1198342A1 (en) |
JP (1) | JP2003505271A (en) |
AU (1) | AU6007000A (en) |
GB (1) | GB9917364D0 (en) |
WO (1) | WO2001007243A1 (en) |
ZA (1) | ZA200200583B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2879956A1 (en) * | 2004-12-24 | 2006-06-30 | Michelin Soc Tech | Pneumatic tyre tread manufacturing procedure includes injection of raw insertion mixture at predetermined points prior to moulding |
WO2006069912A1 (en) * | 2004-12-24 | 2006-07-06 | Société de Technologie Michelin | Method for making a running tread for a tyre |
CN100418751C (en) * | 2005-08-08 | 2008-09-17 | 王彩霞 | Process of producing cold re-treading rubber |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2569935A (en) * | 1948-10-14 | 1951-10-02 | Goodrich Co B F | Method and apparatus for making composite tire articles |
US2744290A (en) * | 1951-04-09 | 1956-05-08 | William G Corson | Apparatus for applying tread rubber to tire carcasses |
US3134137A (en) * | 1961-11-13 | 1964-05-26 | Ralph C Immel | Molding and curing machines |
FR2072999A5 (en) * | 1970-05-11 | 1971-09-24 | Reifenkombinat Furstenwa | Automobile tyres produced by an injection moulding method |
JPH03166916A (en) * | 1989-11-27 | 1991-07-18 | Yokohama Rubber Co Ltd:The | Injection mold |
-
1999
- 1999-07-24 GB GBGB9917364.3A patent/GB9917364D0/en not_active Ceased
-
2000
- 2000-07-21 AU AU60070/00A patent/AU6007000A/en not_active Abandoned
- 2000-07-21 WO PCT/GB2000/002828 patent/WO2001007243A1/en not_active Application Discontinuation
- 2000-07-21 EP EP00946197A patent/EP1198342A1/en not_active Withdrawn
- 2000-07-21 JP JP2001512096A patent/JP2003505271A/en not_active Withdrawn
-
2002
- 2002-01-23 ZA ZA200200583A patent/ZA200200583B/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2569935A (en) * | 1948-10-14 | 1951-10-02 | Goodrich Co B F | Method and apparatus for making composite tire articles |
US2744290A (en) * | 1951-04-09 | 1956-05-08 | William G Corson | Apparatus for applying tread rubber to tire carcasses |
US3134137A (en) * | 1961-11-13 | 1964-05-26 | Ralph C Immel | Molding and curing machines |
FR2072999A5 (en) * | 1970-05-11 | 1971-09-24 | Reifenkombinat Furstenwa | Automobile tyres produced by an injection moulding method |
JPH03166916A (en) * | 1989-11-27 | 1991-07-18 | Yokohama Rubber Co Ltd:The | Injection mold |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 015, no. 404 (M - 1168) 15 October 1991 (1991-10-15) * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2879956A1 (en) * | 2004-12-24 | 2006-06-30 | Michelin Soc Tech | Pneumatic tyre tread manufacturing procedure includes injection of raw insertion mixture at predetermined points prior to moulding |
WO2006069912A1 (en) * | 2004-12-24 | 2006-07-06 | Société de Technologie Michelin | Method for making a running tread for a tyre |
CN100418751C (en) * | 2005-08-08 | 2008-09-17 | 王彩霞 | Process of producing cold re-treading rubber |
Also Published As
Publication number | Publication date |
---|---|
JP2003505271A (en) | 2003-02-12 |
ZA200200583B (en) | 2002-10-30 |
GB9917364D0 (en) | 1999-09-22 |
AU6007000A (en) | 2001-02-13 |
EP1198342A1 (en) | 2002-04-24 |
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