EP2061645A1 - Procédé d'introduction de matière dure dans une bande de roulement de pneumatiques - Google Patents

Procédé d'introduction de matière dure dans une bande de roulement de pneumatiques

Info

Publication number
EP2061645A1
EP2061645A1 EP07801963A EP07801963A EP2061645A1 EP 2061645 A1 EP2061645 A1 EP 2061645A1 EP 07801963 A EP07801963 A EP 07801963A EP 07801963 A EP07801963 A EP 07801963A EP 2061645 A1 EP2061645 A1 EP 2061645A1
Authority
EP
European Patent Office
Prior art keywords
tire
rubber
tread
hard material
hard
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07801963A
Other languages
German (de)
English (en)
Inventor
Reiner Kunz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Center for Abrasives and Refractories Research and Development CARRD GmbH
Original Assignee
Center for Abrasives and Refractories Research and Development CARRD GmbH
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 Center for Abrasives and Refractories Research and Development CARRD GmbH filed Critical Center for Abrasives and Refractories Research and Development CARRD GmbH
Publication of EP2061645A1 publication Critical patent/EP2061645A1/fr
Withdrawn legal-status Critical Current

Links

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
    • 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
    • B29D30/0005—Pretreatment of tyres or parts thereof, e.g. preheating, irradiation, precuring
    • 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
    • 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
    • B29D30/54—Retreading
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/14—Anti-skid inserts, e.g. vulcanised into the tread band
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/20—Compounding polymers with additives, e.g. colouring
    • C08J3/203—Solid polymers with solid and/or liquid additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
    • C08K3/013—Fillers, pigments or reinforcing additives
    • 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
    • B29D30/66—Moulding treads on to tyre casings, e.g. non-skid treads with spikes
    • B29D2030/665—Treads containing inserts other than spikes, e.g. fibers or hard granules, providing antiskid properties
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2321/00—Characterised by the use of unspecified rubbers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/10—Metal compounds
    • C08K3/14—Carbides
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/28—Nitrogen-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/38—Boron-containing compounds

Definitions

  • the present invention relates to a process for the production of hard tire particles containing tire treads according to the preamble of claim 1, an apparatus for producing a corresponding tire tread and tires with a tire tread containing tire material, in particular for motor vehicles, aircraft and industrial vehicles, such. Forklift.
  • the usual manufacture of rubber tires for vehicles is to use a rubber compound containing various chemicals, e.g. Plasticizers and aging or light stabilizers, fillers and carbon blacks, as well as different types of rubber, may be extruded into rubber bands in a belt sprayer. These belts are then further processed to be used as sidewalls, treads or other rubberized portions of the tire.
  • various chemicals e.g. Plasticizers and aging or light stabilizers, fillers and carbon blacks, as well as different types of rubber
  • Tires are used as air or solid rubber tires. Although the two types of tire basically differ in tire structure, both tire types have as a common feature a comparable tire tread, which is generally profiled. The durability of the tire tread normally determines the life of a tire for both pneumatic and solid rubber tires.
  • the tire tread to the tire undercarriage is usually the penultimate step in the manufacture of the tire.
  • a pneumatic tire it is previously applied to the fabric substructure, the so-called carcass, which is wrapped around a bead of rubber Drahtringen is laid, a rubberized steel cord belt layer laid on the then the subsequent tread is applied.
  • the unprofiled green tire is then vulcanized in a tire press at about 175 ° C and profiled at the same time.
  • an intermediate layer is applied to a core or tire foot, to which the running surface is then applied.
  • the green tire is also vulcanized in a hot press and in turn profiled.
  • the treads for applying tire treads are generally manufactured by extrusion processes.
  • the thus obtained tapes are applied to the tire casing after extrusion and all the components of the tire are tightly pressed together to form a green tire, which is then vulcanized in the hot press.
  • a rubber mixture is used as granules in the form of a powder, without the use of a forced mixer, for example in a free fall mixer, even with relatively coarse hard particles easily and homogeneously can be mixed while usually tough elastic rubber mixtures are processed at higher temperatures in a kneader and then extruded.
  • the granulate production itself requires an additional step, in which a rubber compound is machined (rough grinding) or cut (granulators), in order subsequently to be present as pulverulent granules.
  • a rubber compound is machined (rough grinding) or cut (granulators), in order subsequently to be present as pulverulent granules.
  • the elasticity of the rubber is reduced for this work and one works in a temperature range below or near the glass transition temperature of the rubber.
  • Another possibility for granule production is to extrude the rubber mass in the form of fibers and then crush with the aid of a rotary granulator. Also in this case it is expedient to cool the mass before crushing.
  • different mixtures of hard material particles are used. no and rubber granules are used, which are pressed, for example, stacked.
  • the compression of the one or more mixtures advantageously takes place in a mold having the dimensions of the desired tread.
  • the mold is advantageously filled with several layers of different compositions of rubber granules and hard materials or intermediate layers of pure rubber granules, which are then then pressed into a tread.
  • the hardness of the rubber granules is varied, whereby the properties of the tire can be adjusted specifically.
  • the mechanical stress due to compressive, tensile and shear stress can be shifted predominantly to the area of the softer base rubber, whereby the overall adhesion of the particles is improved.
  • the compression of the layers takes place under vacuum in a temperature range between room temperature and below the vulcanization temperature.
  • the mixture of rubber granules and hard material particles can also be processed via rollers to form a tread, which is then applied to the tire underbody according to the invention applied and then vulcanized in the hot press.
  • This alternative has the advantage that the productivity is further increased, but in this way no targeted and different distribution of hard particles in the tread can be achieved as in the aforementioned embodiments.
  • ceramic rollers are to be preferred.
  • the production of treads via compression between rolls is preferably carried out at temperatures between 30 and the vulcanization temperature (about 120 0 C).
  • the treadmill produced by pressing rollers is made into suitable treads after the pressing process.
  • a further advantageous embodiment of the present invention is that several treads one above the other or in the production of smaller treads also juxtaposed or staggered placed on the tire substructure.
  • the tread can be structured, with other possible variations in that it uses, for example, treads with different particle inclusions or with different rubber hardnesses.
  • oxides carbides, nitrides, suicides and / or borides can be used. Preferred embodiments provide that corundum or silicon carbide is used.
  • the average particle size of the hard material particles used is between 0.05 mm and 3 mm, preferably between 0.5 mm and 2 mm, and the Mohs hardness should preferably be at least 7.
  • the hard material particles used are abrasive substances that are used in the tread with the time can cut free, it is particularly advantageous if the hard particles have a substantially round grain shape.
  • the adhesion of the adhesive particles in the rubber matrix can be further improved by the use of an adhesion promoter which is applied to the hard materials even before mixing with the rubber granules.
  • adhesion promoter all known in the rubber industry for this purpose known adhesion promoter can be used.
  • the homogeneous distribution of the hard material particles in the raw material mixture is particularly favorable when the average particle size of the rubber granules has less than or at most 3 times the average particle size of the adhesive particles.
  • a preferred embodiment of the present invention provides that the average particle size of the rubber granules is one-sixth to a maximum of the average particle size of the hard material particles.
  • the rubber granules used in the mixture additionally contain fillers, carbon blacks, plasticizers, anti-aging agents and light stabilizers as well as other chemicals which are advantageous for tire production.
  • the amount of hard material used in the mixture is limited and amounts to advantageously between 3 and 50% by volume, preferably between 8 and 30% by volume, based on the total volume of the tread.
  • the mixing amount is selected in the production so that the thickness of the tread after pressing about 1 to 20 mm, preferably about 10 mm.
  • the subject matter of the present invention is also an apparatus for producing a tire tread, which consists essentially of at least one storage and charging container which is filled with the mixture of rubber granules and hard particles.
  • the mold is guided under the outlet of the charging container and filled with at least one layer of the mixture of rubber granules and hard particles.
  • the press is guided under the press die and the rubber granulate-hard material mixture is pressed to the tire tread.
  • a preferred embodiment of the press provides that the pressing of the tread takes place in a vacuum.
  • the tread is cured at temperatures below the vulcanizing temperature, i. between 30 and 120 ° C, compressed.
  • FIG. 1 shows a cross section of a pneumatic tire
  • FIG. 2 is a plan view of a tread
  • Figure 3 is a schematic representation of an apparatus for producing treads and Figure 4 is a cross section of a solid rubber tire.
  • FIG. 1 shows the cross-section of a pneumatic tire 1, which is composed of a carcass 5, which is placed around a bead 12 and has an airtight rubber layer 6 towards the tire interior.
  • the carcass 5 is covered with a steel cord belt 4, over which the tread 2 is arranged. Beyond the profile 3, the entire tread 2 is offset up to the side rubber 7 with hard particles.
  • coarser hard material particles are embedded in the outer region of the tire 1, while finer hard material particles are provided in the central region of the running surface 2.
  • the edge region of the tread 2 which is usually subject to greater wear, are additionally protected by coarser particles being embedded there, which in addition, based on the volume of the tread, occupy a greater proportion than the fine particles in the middle region of the tire tread ,
  • FIG. 3 shows the schematic representation of a device for manufacturing the running surfaces 2 according to the invention.
  • a press mold 13 is displaceably arranged below charging containers 15.
  • the charging containers 15 are filled with different mixtures of raw materials 16, 17, which are filled in layers via an outlet 18 in the mold 13.
  • the mold is alternately filled with a base rubber mixture 17 and a rubber-hard material mixture 16.
  • a base rubber mixture 17 is filled with a rubber-hard material mixture 16.
  • the finished filled mold 13 is pushed under a ram 14, with the help of which then the tire tread 2 is pressed.
  • the pressing takes place under vacuum at elevated temperatures, which is not apparent in this purely schematic representation.
  • FIG. 4 shows the cross section of a solid rubber tire 1 in which the tire substructure, which consists of a steel core reinforced tire core 21 made of hard rubber and an intermediate layer 20 of softer and more elastic rubber, is covered with a profiled running surface 2, embedded in the relatively coarse hard material particles are.
  • the tire substructure which consists of a steel core reinforced tire core 21 made of hard rubber and an intermediate layer 20 of softer and more elastic rubber, is covered with a profiled running surface 2, embedded in the relatively coarse hard material particles are.
  • the use of hard material-containing treads for the production or retreading of industrial tires is one of the preferred fields of use for the method according to the invention, which can be used both for solid rubber and for pneumatic tires.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Organic Chemistry (AREA)
  • Tyre Moulding (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Tires In General (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

L'invention concerne un procédé de production de bandes de roulement de pneumatiques, selon lequel du caoutchouc sous forme granulaire mélangé avec des particules de matière dure est traité de manière à obtenir des bandes de roulement contenant des particules de matière dure. Les bandes de roulement sont appliquées sur la carcasse du pneu, et l'ébauche de pneu ainsi obtenue est pressée et, en même temps, profilée dans une presse de vulcanisation.
EP07801963A 2006-09-01 2007-08-29 Procédé d'introduction de matière dure dans une bande de roulement de pneumatiques Withdrawn EP2061645A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006041308A DE102006041308A1 (de) 2006-09-01 2006-09-01 Verfahren zum Einbringen von Hartstoffen in eine Reifenlauffläche
PCT/EP2007/007542 WO2008025530A1 (fr) 2006-09-01 2007-08-29 Procédé d'introduction de matière dure dans une bande de roulement de pneumatiques

Publications (1)

Publication Number Publication Date
EP2061645A1 true EP2061645A1 (fr) 2009-05-27

Family

ID=38941821

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07801963A Withdrawn EP2061645A1 (fr) 2006-09-01 2007-08-29 Procédé d'introduction de matière dure dans une bande de roulement de pneumatiques

Country Status (8)

Country Link
US (1) US20100101693A1 (fr)
EP (1) EP2061645A1 (fr)
JP (1) JP2010501377A (fr)
KR (1) KR20090074750A (fr)
CN (1) CN101500789A (fr)
CA (1) CA2659411A1 (fr)
DE (1) DE102006041308A1 (fr)
WO (1) WO2008025530A1 (fr)

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US9370971B2 (en) * 2010-12-29 2016-06-21 Compagnie Generale Des Etablissements Michelin Methods for retreading a tire
CN103072201B (zh) * 2013-01-06 2015-12-02 长沙远大住宅工业集团有限公司 一种预制混凝土构件贴磁砖新工艺
CN103184772B (zh) * 2013-03-19 2016-01-20 辽宁超烁图码科技板业有限公司 一种适用于建筑物外墙的图码保温板的丝网印刷生产方法
US20150013871A1 (en) * 2013-07-15 2015-01-15 Bridgestone Americas Tire Operations, Llc Compression Molded Green Rubber Component and Method for Manufacturing the Same
US10675527B2 (en) * 2017-01-25 2020-06-09 Trugrit Traction, Inc. Pipe transporter traction wheel
CN108715116B (zh) * 2018-05-04 2021-01-05 常熟理工学院 雪地胎
CN112497796A (zh) * 2020-09-29 2021-03-16 无锡市佳盛高新改性材料有限公司 一种白胎侧结构子午线轮胎加工方法
CN114043704A (zh) * 2021-11-17 2022-02-15 赛轮集团股份有限公司 实心胎钢丝圈定位胶片生产工艺

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Also Published As

Publication number Publication date
US20100101693A1 (en) 2010-04-29
CN101500789A (zh) 2009-08-05
CA2659411A1 (fr) 2008-03-06
DE102006041308A1 (de) 2008-03-20
WO2008025530A1 (fr) 2008-03-06
KR20090074750A (ko) 2009-07-07
JP2010501377A (ja) 2010-01-21

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