EP3976342A1 - Procédé de production d'un mélange de caoutchouc extrudé réticulable au soufre et dispositif pour mettre en oeuvre ce procédé et son utilisation - Google Patents

Procédé de production d'un mélange de caoutchouc extrudé réticulable au soufre et dispositif pour mettre en oeuvre ce procédé et son utilisation

Info

Publication number
EP3976342A1
EP3976342A1 EP20715865.0A EP20715865A EP3976342A1 EP 3976342 A1 EP3976342 A1 EP 3976342A1 EP 20715865 A EP20715865 A EP 20715865A EP 3976342 A1 EP3976342 A1 EP 3976342A1
Authority
EP
European Patent Office
Prior art keywords
rubber mixture
temperature
unit
sulfur
control unit
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.)
Pending
Application number
EP20715865.0A
Other languages
German (de)
English (en)
Inventor
Monir Sharifi
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.)
Continental Reifen Deutschland GmbH
Original Assignee
Continental Reifen Deutschland 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 Continental Reifen Deutschland GmbH filed Critical Continental Reifen Deutschland GmbH
Publication of EP3976342A1 publication Critical patent/EP3976342A1/fr
Pending legal-status Critical Current

Links

Classifications

    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • 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
    • B29B7/00—Mixing; Kneading
    • B29B7/002—Methods
    • B29B7/007—Methods for continuous mixing
    • 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
    • B29B7/00—Mixing; Kneading
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/7476—Systems, i.e. flow charts or diagrams; Plants
    • B29B7/7495—Systems, i.e. flow charts or diagrams; Plants for mixing rubber
    • 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
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/82—Heating or cooling
    • B29B7/823—Temperature control
    • 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
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/82—Heating or cooling
    • B29B7/826—Apparatus therefor
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/288—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules
    • B29C48/2888—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules in thread form or in strip form, e.g. rubber strips
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/793—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling upstream of the plasticising zone, e.g. heating in the hopper
    • 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)
    • B29D30/38—Textile inserts, e.g. cord or canvas layers, for tyres; Treatment of inserts prior to building the tyre
    • 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
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • 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
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58—Component parts, details or accessories; Auxiliary operations
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92828—Raw material handling or dosing, e.g. active hopper or feeding device
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92933—Conveying, transporting or storage of 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92961—Auxiliary unit, e.g. for external melt filtering, re-combining or transfer between units
    • 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)
    • B29D30/38—Textile inserts, e.g. cord or canvas layers, for tyres; Treatment of inserts prior to building the tyre
    • B29D2030/381—Textile inserts, e.g. cord or canvas layers, for tyres; Treatment of inserts prior to building the tyre the inserts incorporating reinforcing parallel cords; manufacture thereof
    • 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
    • B29K2021/006—Thermosetting elastomers
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/24—Condition, form or state of moulded material or of the material to be shaped crosslinked or vulcanised
    • B29K2105/246—Uncured, e.g. green
    • 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

Definitions

  • the invention relates to a method for producing an extruded
  • the invention also relates to a device for carrying out the method and the use of the device.
  • a mixed rubber mixture is extruded, for example by means of the screws in a twin-screw extruder, and then shaped into a rubber profile by means of a molding unit such as a front and end template.
  • Deviations from the geometric dimensions or excessive fluctuations in the weight of the rubber profile often lead to a large part of the rubber profile having to be discarded and thus unnecessarily polluting the environment or the
  • a primary object on which the invention is based is therefore to provide a method for producing an extruded, sulfur-crosslinkable rubber mixture
  • step B Contactless tempering of the in step a. manufactured or provided sulfur-crosslinkable rubber mixture in a temperature control unit to at least 40 ° C,
  • step B) Optional measurement of the temperature of the tempered in step B)
  • Rubber compound preferably in the temperature control unit,
  • step D) adding the temperature-controlled in step B) and measured in step C)
  • Extrusion unit produced rubber profile can be reduced.
  • the deviations from the targeted target value of the weight per meter can be halved by heating to at least 40 ° C. upstream of the extrusion unit in step B) of a method according to the invention.
  • Such a halving of the deviations from the nominal value of the weight per meter results in an increase in productivity of at least 5% compared to methods not according to the invention without temperature control as in step B) and thus to a considerable relief of the environment.
  • a temperature control unit designed for this is a sulfur-crosslinkable one located in the temperature control unit Heating the rubber mixture to at least 60 ° C or even over 80 ° C reduces the aforementioned deviations even further.
  • step B due to the temperature control in step B), not only the deviations from the target value of the weight per meter can be reduced, but surprisingly also the pressures and pressure fluctuations occurring in the extrusion unit
  • the pressure reduction leads to energy savings and low temperature fluctuations and thus to more uniform geometric dimensions.
  • an extrusion unit common in the rubber industry comprises a molding component, for example an end template, which the extruded
  • Rubber compound is a rubber profile.
  • an extrusion unit therefore comprises, as standard, a molding component described above, so that the method according to the invention is in particular a method for producing a molded rubber profile.
  • sulfur-crosslinkable rubber mixture includes in particular a sulfur-crosslinkable finished rubber mixture.
  • the expression “contactless tempering of a mixture” means that the mixture is heated by means of thermal radiation, for example in an oven. Another type of heating via thermal conduction or convection is also possible, but the expression “contactless temperature control” in the context of the present invention includes at least temperature control by means of thermal radiation.
  • the expression “a unit B downstream of unit A” means that the rubber mixture for the production of the
  • Rubber profile first passes unit A and then unit B. It is particularly preferred if the extrusion unit is in one described below
  • the device according to the invention connects directly to the temperature control unit, so that the temperature of the rubber mixture between the temperature control unit and the extrusion unit does not decrease, in particular does not decrease by 5 ° C.
  • the expression “tempering a rubber mixture” encompasses any action that results in a significant deviation of the natural cooling behavior of a rubber mixture for a given
  • Ambient temperature of 25 ° C. this includes both heating, for example by means of heating elements, and cooling of the rubber mixture that is slower than the natural cooling behavior, but preferably heating.
  • a natural cooling behavior of a rubber mixture is, in particular, the temperature adjustment of a heated rubber mixture to the ambient temperature due to the thermodynamic equilibrium.
  • the expression “tempering a rubber mixture” therefore does not include the heating of a rubber mixture which has a temperature below
  • the expression “producing a sulfur-crosslinkable rubber mixture” preferably includes, in particular, the production of a sulfur-crosslinkable finished rubber mixture.
  • step E) is preferably carried out by means of a control unit as described below for a device according to the invention:
  • step C) ensures that the
  • Rubber compound was heated sufficiently so that the predetermined temperature of at least 40 ° C was reached.
  • the temperature measurement is therefore preferably carried out in the temperature control unit.
  • Rubber compound after the extrusion unit thus represents a great achievement of the present invention.
  • step E) is preferably carried out by means of a control unit as described below for a device according to the invention:
  • control unit can continuously and fully automatically ensure during the extrusion that the rubber mixture or its surface has 40 ° C or a desired higher temperature value when entering the extrusion unit, so that the said drive power, the Pressure of the rubber compound in the extrusion unit, the
  • a corresponding control unit has the components of a standard control unit known in the prior art and thus enables a complete control unit
  • the rubber mixture is within the scope of the present invention preferably the rubber mixture in the temperature control unit or the rubber mixture immediately before being fed into the extrusion unit or the feed unit described below.
  • step E) is preferably carried out by means of a control unit as described below for a device according to the invention:
  • step E) is preferably carried out by means of a control unit as described below for a device according to the invention:
  • An advantage of the above-described aspect of the present invention is that the above-described regulation of the regulation unit includes all regulation parameters for avoiding an excessively high temperature in the extrusion unit.
  • step E) is preferably carried out by means of a control unit as described below for a device according to the invention:
  • the above-described regulation of the regulation unit includes all regulation parameters for reducing the deviations from the target value of the weight per meter of the extruded rubber profile.
  • step E) is preferably carried out by means of a control unit as described below for a device according to the invention:
  • the sulfur-crosslinkable rubber mixture tempered in step B) having a temperature in the temperature control unit at least partially in the range from 40 ° C. to 150 ° C., preferably in the range from 50 ° C to 110 ° C.
  • An advantage of the aspect of the present invention described above is that particularly small deviations from the target value of the weight per meter as described above occur, particularly at these temperatures.
  • a method according to the invention as described above or as described above as preferred or in particular as described above as particularly preferred is also particularly preferred, the sulfur-crosslinkable rubber mixture fed in in step D) at least partially at a temperature in the range from 20 ° C.
  • to 150 ° in the extrusion unit C preferably in the range from 30 ° C to 110 ° C, particularly preferably in the range from 40 ° C to 80 ° C, and / or has a pressure in the range from 5 to 150 bar, preferably in the range from 70 to 110 bar , particularly preferably in the range from 90 to 105 bar, very particularly preferably in the range from 93 to 100 bar.
  • An advantage of the above-described aspect of the present invention is that particularly small deviations from the target value of the weight per meter as described above occur particularly at these temperatures and pressures.
  • a method according to the invention is preferred as described above or as described above as preferred, wherein
  • the sulfur crosslinkable rubber mixture when measured in step C) has a Mooney viscosity [ML1 + 4 at 100 ° C.] in the range from 40 MU to 150 ME! having.
  • the temperature control unit can also be used to extrude rubber mixtures as described above to give a rubber profile with a high quality and dimensional stability as described above.
  • the temperature control unit and / or the extrusion unit comprises measuring sensors, one or more of the measuring sensors determining the temperature of the rubber mixture in the temperature control unit in step C) and / or in a further process step the temperature and the pressure of the
  • Rubber mixture determined in the extrusion unit Rubber mixture determined in the extrusion unit.
  • step A0 A method according to the invention as described above or as described above as preferred is preferred, the method comprising the following step A0), which is carried out before step A):
  • Has mixer for producing sulfur crosslinkable rubber mixtures which is connected upstream of the temperature control unit.
  • step D) of the method being:
  • step D) feeding the sulfur-crosslinkable rubber mixture measured in step C) at a temperature of 35 ° C. or more by means of a feed unit into an extrusion unit and extruding the material fed into the extrusion unit
  • Temperature control unit is connected downstream.
  • the invention also relates to a device for carrying out a method as described above or as described above as being preferred or as described below as an aspect
  • At least one extrusion unit connected downstream of the temperature control unit, characterized in that
  • the temperature control unit is designed to heat a sulfur-crosslinkable rubber mixture located in the temperature control unit to at least 40 ° C.
  • a device according to the invention is preferred as described above or as described above as preferred, the device comprising measuring sensors, one or more of the measuring sensors being designed and arranged for the temperature of the rubber mixture in the temperature control unit and / or the temperature and / or the pressure to determine the rubber mixture in the extrusion unit.
  • a device as described above or as described above as preferred, the device comprising measuring sensors, one or more of the measuring sensors being designed and arranged to determine the temperature of the rubber mixture in the temperature control unit and preferably also the temperature or the To determine the pressure of the rubber mixture in the extrusion unit.
  • An advantage of the aspect of the present invention described above is that the temperature of the rubber mixture in the temperature control unit is thus constantly from one Operator can be monitored to ensure the above-described benefits of the resulting rubber profile of the present invention.
  • a device according to the invention is preferred as described above or as described above as preferred, the device comprising measuring sensors, with one or more of the measuring sensors being designed and arranged for this purpose, the temperature of the rubber mixture in the temperature control unit and the temperature and pressure of the rubber mixture in the To determine extrusion unit.
  • An advantage of the above-described aspect of the present invention is that by monitoring the temperature or the pressure of the rubber mixture in the extrusion unit it can also be ensured that the rubber mixture in the extrusion unit does not experience too high a temperature and thus already vulcanized or precured. Vulcanized or pre-vulcanized rubber mixture must also be discarded and thus reduce the efficiency of a rubber mixture according to the invention
  • a device according to the invention as described above or as described above as preferred is preferred, the device additionally having a
  • Control unit comprises which is designed to depend on the temperature of a rubber mixture in the temperature control unit
  • control unit can be continuously and fully automatically ensured during the extrusion that the rubber mixture has 40 ° C or a desired higher temperature value when entering the extrusion unit, so that the said drive power, the pressure of the Rubber mixture in the extrusion unit, the pressure fluctuations of the rubber mixture in the extrusion unit or the fluctuations in weight per meter of the extruded rubber mixture is reduced.
  • a corresponding control unit has the components of a standard control unit known in the prior art and thus enables complete automation with improved quality of the weight and the geometry of the rubber profile produced, as described above.
  • a device according to the invention as described above or as described above as preferred is preferred, wherein the temperature control unit and / or the
  • Extrusion unit comprises measuring sensors, wherein one or more of the measuring sensors can determine the temperature of the rubber mixture in the temperature control unit in step C) and / or in a further method step the temperature and pressure of the
  • One advantage of the above-described aspect of the present invention is that the above-described control parameters of the above-described control unit can be detected.
  • a device according to the invention is preferred as described above or as described above as preferred, the method comprising the following step A0), which is carried out before step A):
  • Has mixer for producing sulfur-crosslinkable rubber mixtures which is connected upstream of the temperature control unit.
  • step D) of the method being:
  • step D) feeding the sulfur-crosslinkable rubber mixture measured in step C) at a temperature of 35 ° C. or more by means of a feed unit into an extrusion unit and extruding the rubber mixture fed into the extrusion unit in the extrusion unit, the feed unit comprising a rolling mill or an extruder, the The feed unit is preferred
  • Temperature control unit is connected downstream.
  • a device according to the invention as described above or as described above as preferred, the device additionally having a
  • Control unit comprises which is designed to depend on the temperature of a rubber mixture in the temperature control unit
  • a device according to the invention as described above or as described above as preferred, the device additionally having a
  • Control unit comprises which is designed to depend on the temperature of a rubber mixture in the temperature control unit
  • An advantage of the above-described aspect of the present invention is that the above-described regulation of the regulation unit includes all regulation parameters for avoiding an excessively high temperature in the extrusion unit.
  • a device according to the invention as described above or as described above as preferred, the device additionally having a
  • Control unit comprises which is designed to depend on the temperature of a rubber mixture in the temperature control unit
  • the above-described regulation of the regulation unit includes all regulation parameters for reducing the deviations from the target value of the weight per meter of the extruded rubber profile.
  • a device according to the invention as described above or as described above as preferred, the device additionally having a
  • Control unit comprises which is designed to depend on the temperature of a rubber mixture in the temperature control unit
  • a device according to the invention as described above or as described above as preferred is preferred, the device being a mixer for
  • a storage unit being spatially arranged between the mixer and the temperature control unit, the storage unit being set up to cool a rubber mixture produced in the mixer to below 40 ° C or even below 30 ° C .
  • a storage unit could be a one-euro pallet, for example.
  • An advantage of the above-described aspect of the present invention is that in particular previously stored rubber mixtures which have a temperature below 40 ° C. or even below 30 ° C. have particularly high deviations from the target weight per meter according to an extrusion known in the prior art.
  • the use of a device according to the invention with such rubber mixtures is therefore particularly advantageous.
  • a device according to the invention as described above or as described above as preferred is preferred, with the at least one
  • Rubber mixtures have a temperature control unit without mixing tools, such as
  • Rubber mixtures is present
  • An advantage of the aspect of the present invention described above is that a faster and more cost-effective heating of the rubber mixture prior to extrusion in a said temperature control unit of a device according to the invention is effected compared to devices according to the invention in which a temperature control unit described above comprises the said tools.
  • the temperature control units described above without the said mixing tools have the advantage that they do not shorten the chains of the rubber molecules, which disproportionately improves the chemical and physical properties of the later resulting tires.
  • the technical effect here is due to the new combination of contactless temperature control and subsequent control with temperature measurement of the temperature-controlled rubber mixture or its surface.
  • a device according to the invention as described above or as described above as preferred, is preferred which is set up for the extrusion of rubber mixtures intended for the production of tires.
  • a device according to the invention as described above or as described above as preferred is preferred, the device instead of the at least one temperature control unit for contactless temperature control of a crosslinkable sulfur
  • Rubber mixtures comprises at least one oven or at least one heating unit for heating by means of microwaves and is preferably designed to heat a sulfur-crosslinkable rubber mixture located on the feed unit to at least 70 ° C.
  • the temperature control unit can also exclusively or additionally comprise an IR radiator.
  • a device according to the invention as described above or as described above as preferred is preferred, the device in addition to
  • Temperature control unit for contactless temperature control comprises at least one oven or at least one heating unit for heating by means of microwaves and is preferably designed to a sulfur-crosslinkable rubber mixture on the feed unit must be heated to at least 70 ° C.
  • An advantage of the aspect of the present invention described above is that the deviations from the targeted target value of the weight per meter are divided into three by heating to at least 50 ° C. in front of the extrusion unit of a device according to the invention.
  • Such a third division of the deviations from the nominal value of the weight per meter results in an increase in productivity of at least 7% compared to devices not according to the invention and thus in a considerable relief of the environment.
  • This not only reduces the deviations from the nominal weight per meter, but also the pressures and pressure fluctuations of the rubber mixture occurring in the extrusion unit or the drive power of the extruder screw of the extrusion unit of a device according to the invention used for extrusion of the rubber mixture in the extrusion unit as described above or as preferred below described
  • a device according to the invention is preferred as described above or as described above as preferred, the device additionally having at least one feed unit for feeding rubber mixtures into the downstream unit
  • Device for extruding a rubber mixture comprises, wherein the feed unit is preferably connected downstream of the temperature control unit.
  • a device comprising: - At least one temperature control unit for contactless temperature control of a sulfur-crosslinkable rubber mixture
  • At least one extrusion unit connected downstream of the temperature control unit, characterized in that
  • the device additionally comprises several measuring sensors and
  • the temperature control unit is designed to heat a sulfur-crosslinkable rubber mixture in the temperature control unit to at least 50 ° C,
  • the multiple measuring sensors are designed and arranged for this purpose, the temperature and the pressure of the rubber mixture in the temperature control unit and the
  • the device additionally comprises a control unit which is designed to regulate the temperature of a rubber mixture in the temperature control unit as a function of the fluctuations in weight per meter of the extruded rubber mixture downstream of the extrusion unit,
  • the device has a mixer for producing sulfur-crosslinkable
  • Has rubber mixtures which is connected upstream of the temperature control unit,
  • the temperature control unit does not have any mixing tools such as gears for extruding rubber mixtures, rolling mills or extruder screws
  • the temperature control unit comprises at least one IR radiator or at least one oven or at least one heating unit for heating by means of microwaves.
  • the feed unit comprises a rolling mill or an extruder, wherein the
  • Feed unit is connected downstream of the temperature control unit.
  • Process according to the invention for producing an extruded, sulfur-crosslinkable Rubber mixtures also apply to all aspects of a use described below and the advantageous aspects of uses according to the invention discussed below apply accordingly to all aspects of a device according to the invention for carrying out a method as described above or as described above as preferred or as described below as an aspect and a method according to the invention for Manufacture an extruded,
  • the invention also relates to a use of a device as above
  • At least one extrusion unit connected downstream of the temperature control unit, characterized in that
  • the temperature control unit is designed to heat a sulfur-crosslinkable rubber mixture located in the temperature control unit to at least 40 ° C.
  • the device comprises measuring sensors, one or more of the measuring sensors being designed and arranged to determine the temperature of the rubber mixture in the temperature control unit and the temperature and pressure of the rubber mixture in the extrusion unit. 3. Device according to one of the preceding aspects, wherein the device additionally comprises a control unit which is designed to control the temperature of a rubber mixture in the temperature control unit
  • the feed unit additionally comprises at least one feed unit for feeding rubber mixtures into the downstream extrusion unit, wherein the feed unit comprises a rolling mill or an extruder, the feed unit preferably being connected downstream of the temperature control unit.
  • the device comprises at least one furnace or at least one heating unit for heating by means of microwaves and is preferably designed to heat a sulfur-crosslinkable rubber mixture located on the feed unit to at least 70 ° C.
  • Rubber mixture comprising the following process steps:
  • the temperature of the sulfur-crosslinkable rubber mixture being less than 35 ° C
  • Rubber mixture with a temperature of 35 ° C or more in an extrusion unit and extruding the fed rubber mixture in the extrusion unit Rubber mixture with a temperature of 35 ° C or more in an extrusion unit and extruding the fed rubber mixture in the extrusion unit.
  • the sulfur-crosslinkable rubber mixture fed in in step D) in the extrusion unit at least partially has a temperature in the range from 20 ° C to 150 ° C, preferably in the range from 40 ° C to 80 ° C, and / or has a pressure in the range from 5 to 150 bar, preferably in the range from 70 to 110 bar, particularly preferably in the range from 90 to 105 bar, very particularly preferably in the range from 93 to 100 bar.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Textile Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

L'invention concerne un procédé de production d'un mélange de caoutchouc extrudé réticulable au soufre, comprenant les étapes suivantes : A) production d'un mélange de caoutchouc réticulable au soufre au moyen d'un mélangeur ou préparation d'un mélange de caoutchouc réticulable au soufre, la température du mélange de caoutchouc réticulable au soufre étant inférieure à 35 °C, B) régulation sans contact de la température du mélange de caoutchouc réticulable au soufre produit ou préparé à l'étape A) dans une unité de régulation de température à au moins 40 °C, C) mesure de la température du mélange de caoutchouc dans l'unité de régulation de température et D) acheminement du mélange de caoutchouc réticulable au soufre mesuré à l'étape C) à une température égale ou supérieure à 35 °C dans une unité d'extrusion et extrusion du mélange de caoutchouc acheminé dans l'unité d'extrusion. L'invention concerne également un dispositif pour mettre en oeuvre ce procédé et l'utilisation de ce dispositif.
EP20715865.0A 2019-05-27 2020-03-30 Procédé de production d'un mélange de caoutchouc extrudé réticulable au soufre et dispositif pour mettre en oeuvre ce procédé et son utilisation Pending EP3976342A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019207732.3A DE102019207732A1 (de) 2019-05-27 2019-05-27 Verfahren zum Herstellen einer extrudierten, schwefelvernetzbaren Kautschukmischung und Vorrichtung zur Durchführung des Verfahrens sowie deren Verwendung
PCT/EP2020/059006 WO2020239293A1 (fr) 2019-05-27 2020-03-30 Procédé de production d'un mélange de caoutchouc extrudé réticulable au soufre et dispositif pour mettre en oeuvre ce procédé et son utilisation

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Publication Number Publication Date
EP3976342A1 true EP3976342A1 (fr) 2022-04-06

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EP20715865.0A Pending EP3976342A1 (fr) 2019-05-27 2020-03-30 Procédé de production d'un mélange de caoutchouc extrudé réticulable au soufre et dispositif pour mettre en oeuvre ce procédé et son utilisation

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US (1) US12485600B2 (fr)
EP (1) EP3976342A1 (fr)
JP (1) JP7316382B2 (fr)
CN (1) CN113874190B (fr)
DE (1) DE102019207732A1 (fr)
WO (1) WO2020239293A1 (fr)

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JP2022533941A (ja) 2022-07-27
WO2020239293A1 (fr) 2020-12-03
JP7316382B2 (ja) 2023-07-27
US12485600B2 (en) 2025-12-02
CN113874190B (zh) 2023-10-13
CN113874190A (zh) 2021-12-31
US20220227034A1 (en) 2022-07-21
DE102019207732A1 (de) 2020-12-03
BR112021022565A2 (pt) 2021-12-28

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