WO2000067976A1 - Procede d'addition de particules dans un caoutchouc brut et d'autres polymeres - Google Patents

Procede d'addition de particules dans un caoutchouc brut et d'autres polymeres Download PDF

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Publication number
WO2000067976A1
WO2000067976A1 PCT/NO2000/000148 NO0000148W WO0067976A1 WO 2000067976 A1 WO2000067976 A1 WO 2000067976A1 NO 0000148 W NO0000148 W NO 0000148W WO 0067976 A1 WO0067976 A1 WO 0067976A1
Authority
WO
WIPO (PCT)
Prior art keywords
particles
rubber
accordance
polymer
extruder
Prior art date
Application number
PCT/NO2000/000148
Other languages
English (en)
Inventor
Lars Erik BÖNAA
Torbjörn BERG
Original Assignee
Troms Dekk As
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 Troms Dekk As filed Critical Troms Dekk As
Priority to AU44391/00A priority Critical patent/AU4439100A/en
Publication of WO2000067976A1 publication Critical patent/WO2000067976A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/002—Methods
    • B29B7/007—Methods for continuous mixing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B01F35/211—Measuring of the operational parameters
    • B01F35/2114—Speed of feeding material, e.g. bands or strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/22—Control or regulation
    • B01F35/221—Control or regulation of operational parameters, e.g. level of material in the mixer, temperature or pressure
    • B01F35/2211—Amount of delivered fluid during a period
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B01F35/83—Forming a predetermined ratio of the substances to be mixed by controlling the ratio of two or more flows, e.g. using flow sensing or flow controlling devices
    • 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
    • B29B7/72—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
    • B29B7/74—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
    • B29B7/88—Adding charges, i.e. additives
    • B29B7/90—Fillers or reinforcements, e.g. fibres
    • 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
    • B29C48/2886—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules of fibrous, filamentary or filling materials, e.g. thin fibrous reinforcements or fillers
    • 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 band 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
    • B29C48/92—Measuring, controlling or regulating
    • 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
    • B29C2948/9258—Velocity
    • 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
    • B29C2948/9258—Velocity
    • B29C2948/926—Flow or feed rate
    • 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
    • B29C2948/92609—Dimensions
    • B29C2948/92657—Volume or quantity
    • 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
    • B29C2948/92866—Inlet shaft or slot, e.g. passive hopper; Injector, e.g. injector nozzle on barrel
    • 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
    • B29C2948/92952—Drive section, e.g. gearbox, motor or drive fluids
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • 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
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • 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
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/16—Fillers

Definitions

  • the present invention relates to a method of dosing and adding a desired quantity of solid particles into initially non-vulcanized rubber or other polymers.
  • the experience from this method is that the composition can be inconsistent, and the cross section of the strip varied both in width and thickness.
  • the circumstances made it impossible to produce tyres having a uniform quality with regard to balance and roundness, including lateral and radial eccentricity.
  • an object of the present invention is to provide a method of dosing and adding a desired quantity of solid particles into a predetermined quantity of initially non- vulcanized rubber or other polymers, thus achieving a homogenous mixture of particles and rubber or other polymers.
  • Another object of the invention is to perform the method above to limit and control the degree of abrasive wear of the production equipment by the particles as far as possible.
  • Yet another object is to utilise said method for the addition of abrasive particles to rubber or other polymer compositions in the manufacture of friction tyres, antiskid soles, etc.
  • the invention relates to a method of dosing and adding solid particles into non- vulcanized rubber or other polymers, wherein the method is characterized by mixing the components with a stud extruder, performing a continuous measurement of the rubber or polymer added, and continuously dosing the particle quantity into the stud extruder in relation to the quantity of rubber or polymer being added as defined by patent claim 1.
  • Preferred embodiments appears from the dependent claims.
  • the challenge from which the present invention originated is bipartite. Firstly it was necessary to find a method limiting the wear damage to the production equipment, particularly from abrasive particles, or at least simplify repair of such damage. This is achieved by using a stud extruder where the internal surface is substantially limited in relation to conventional mixers, decreasing preplacement or repair of wear components similarly.
  • extruder of this type By the use of an extruder of this type, the particles are given a short travel distance from dosing to complete blending.
  • This type of machine is known as having a very satisfactory mixing effect and to provide a fast plastification of the rubber after dosage.
  • the extruder turns the mass back to the dosage inlet as a paste during kneading, since the machine is operated in a particular manner dependent on screw speed and heat supply. For that reason extruders of this type always exhibit a top mounted inlet opening. Then, the powder material to be blended can be dropped directly down into the inlet opening where the powder is kneaded into the plastified rubber paste.
  • the second challenge consisted in achieving a homogenous mixture of rubber or polymer and particles regardless of the variations in polymer addition occuring naturally with commonly used crude polymers in the form of strips or similar. This is achieved by the use of a dosage system for the particles which are subjected to a continuous control in relation to the quantity of polymer being supplied.
  • a dosage system of this type may per se comprise prior art measuring units, weighing units and dosage units, as exemplified below.
  • the method of the present invention is simple and flexible, in addition to reducing wear and resulting maintenance costs to an acceptable level. In this manner friction rubber and tyres can be manufactured in an economically acceptable manner. Moreover, the present method is so simple to rearrange that it offers full freedom in tailoring the production in view of rubber quality, component portions and, last but not least, the components per se.
  • the accompanying figure illustrates schematically a stud extruder with accompanying accesories for rubber/polymer and particles.
  • the stud extruder 1 exhibits an inlet 2 for rubber/polymer, which also is used for supply of particles, and an outlet (extruder die) 3 for blended material.
  • the interior of the extruder is not illustrated.
  • the system further comprises a tachogenerator 5, a container 7 for particles and a cell dispenser 8 or a similar particle weighing system, and a computer (PC) 9.
  • PC computer
  • the quantity or rubber supplied into the extruder 1 is monitored by a tachogenerator 5 rolling unrestrained on the rubber strip 4 as the latter is drawn across a tilted board provided with lateral guiding means.
  • the tachogenerator 5 produces electrical voltage pulses timed with the speed of the rubber strip 4, and the pulses are preferably logged by a PC 9 as a measure of the rotational speed of the tachometer wheel. Between the tachometer wheel 5 and the rubber strip 4 there is a high friction level, and accordingly, no slip should occur.
  • the circumference of the wheel is preferably stored as a constant in the software. Rubber strip width and thickness can be established as static variables in the software. Moreover, the specific gravity of the rubber/polymer material can be established as a constant multiplier.
  • the total weight of the container 7 with particles 6 is logged regularly.
  • the system will raise a message when refill of the container 7 is required and perform weighing of the quantity of particles 6 being refilled. If desirable, the system is also able to refill the container 7 from a bin (not illustrated) automaticically.
  • the output is controlled by means of the speed of the cell dispenser 8.
  • Each cell ejects a known volume, and the specific gravity of the particle material to be ejected can be established as a constant multiplier in the software. Ready-mixed material is ejected from the extruder die 3, and the cross-sectional profile can be selected in a common manner.
  • the system can handle several types of powder materials.
  • the specific gravity of each material in question can be established as constants in the software.
  • the main purpose of the invention is to mix friction promoting particles in the tread of snow tyres, but it is also applicable for blending granulated rubber from recycled tyres. Thus it is possible to save considerable amounts of fresh rubber in the production of tyres by recycling vulcanized rubber from old tyres.
  • the present inventors developed the invention on a Marangoni Compact 100, which is a combined extruder and tyre construction machine. It has shown to be particularly useful as it is applicable to both construction of tyres for sale and for production of semifinished products formed as camelback or strips for other tyre manufacturers.
  • the inventors also conducted experiments with types of minerals other than those disclosed in NO Patent 177 048. As is common in any grinding or gluing process, it is desirable that the particles to be intermixed are clean and dust-free. This has been verified by mixing washed un-primed mineral particles having a size of 0,2-1,2 mm. Particles of this category are shown to exhibit a substantially improved adhesion to rubber than the primed and dust containing particles of NO Patent 177048.
  • Rubber er se is an adhesive material having a high degree of adhesion, and accordingly the inventors have stated that priming of clean porous surfaces is not necessary.
  • the bonding strength between the particles and the matrix material can also be increased by breaking down or removing the oxide layer on the particle surface immediately prior to mixing. Such breakdown of the oxide layer is achievable from mechanical strain such as agitation or pneumatic transport or from acid-wash (etching) followed by drying. Subsequent to a treatment of this type the particles must be mixed within a short period of time to prevent formation of a new oxide layer, or the particles must be kept within an oxygen- free environment, e.g., by displacing the air from the sand container with an inert gas such as argon.
  • An alternative method of increasing the bonding strength is to heat the sand particles to at least 20-30°C above the rubber vulcanization temperature. Subsequent kneading of the particles into the rubber will initiate vulcanization of rubber contacting the particles, but the process is gradually halted with the heat loss from the particles.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

L'invention concerne un procédé permettant de doser et de mélanger des particules solides à un caoutchouc non vulcanisé ou à des matières polymères. Une extrudeuse, utilisée comme unité de mélange, reçoit une quantité de caoutchouc ou de polymère ajouté qui est mesurée en continu et une quantité de particules apportée qui est mesurée en continu par rapport à la quantité apportée de caoutchouc ou de polymère. Le procédé est particulièrement indiqué lors de l'addition de particules abrasives au caoutchouc pour la production de pneumatiques ou de semelles antidérapantes pour chaussures.
PCT/NO2000/000148 1999-05-10 2000-05-04 Procede d'addition de particules dans un caoutchouc brut et d'autres polymeres WO2000067976A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU44391/00A AU4439100A (en) 1999-05-10 2000-05-04 Method for adding particles to raw rubber and other polymers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO19992253 1999-05-10
NO19992253A NO310648B1 (no) 1999-05-10 1999-05-10 Metode for dosering og innblanding av partikler i uvulkanisert gummi og andre polymerer

Publications (1)

Publication Number Publication Date
WO2000067976A1 true WO2000067976A1 (fr) 2000-11-16

Family

ID=19903317

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2000/000148 WO2000067976A1 (fr) 1999-05-10 2000-05-04 Procede d'addition de particules dans un caoutchouc brut et d'autres polymeres

Country Status (3)

Country Link
AU (1) AU4439100A (fr)
NO (1) NO310648B1 (fr)
WO (1) WO2000067976A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002016097A2 (fr) * 2000-08-23 2002-02-28 General Electric Company Compositions de caoutchouc thermodurcissable de melangeage
FR2841891A1 (fr) * 2002-07-02 2004-01-09 Francois Narbonne Garniture exterieure pour objet tenu a la main
US8191593B2 (en) 2005-05-13 2012-06-05 Diversey, Inc. Non-slipping wheel
DE102012005469A1 (de) * 2012-03-17 2013-09-19 Richard Warnking Vorrichtung und Verfahren zur Herstellung von Formteilen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2177819A (en) * 1985-07-20 1987-01-28 Krupp Gmbh Process for operating an extruder
US5158725A (en) * 1991-04-29 1992-10-27 The Goodyear Tire & Rubber Company Continuous mixing of elastomeric compounds
US5439623A (en) * 1994-04-29 1995-08-08 E. I. Du Pont De Nemours And Company Method for introducing additives into an extruder
US5711904A (en) * 1995-09-05 1998-01-27 The Goodyear Tire & Rubber Company Continuous mixing of silica loaded elastomeric compounds

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2177819A (en) * 1985-07-20 1987-01-28 Krupp Gmbh Process for operating an extruder
US5158725A (en) * 1991-04-29 1992-10-27 The Goodyear Tire & Rubber Company Continuous mixing of elastomeric compounds
US5439623A (en) * 1994-04-29 1995-08-08 E. I. Du Pont De Nemours And Company Method for introducing additives into an extruder
US5711904A (en) * 1995-09-05 1998-01-27 The Goodyear Tire & Rubber Company Continuous mixing of silica loaded elastomeric compounds

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002016097A2 (fr) * 2000-08-23 2002-02-28 General Electric Company Compositions de caoutchouc thermodurcissable de melangeage
WO2002016097A3 (fr) * 2000-08-23 2002-05-02 Gen Electric Compositions de caoutchouc thermodurcissable de melangeage
US6474971B1 (en) 2000-08-23 2002-11-05 General Electric Company Compounding heat cured rubber compositions
FR2841891A1 (fr) * 2002-07-02 2004-01-09 Francois Narbonne Garniture exterieure pour objet tenu a la main
US8191593B2 (en) 2005-05-13 2012-06-05 Diversey, Inc. Non-slipping wheel
DE102012005469A1 (de) * 2012-03-17 2013-09-19 Richard Warnking Vorrichtung und Verfahren zur Herstellung von Formteilen

Also Published As

Publication number Publication date
NO992253D0 (no) 1999-05-10
NO992253L (no) 2000-11-13
NO310648B1 (no) 2001-08-06
AU4439100A (en) 2000-11-21

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