FR2421723A1 - TWO-SCREW EXTRUDER - Google Patents

TWO-SCREW EXTRUDER

Info

Publication number
FR2421723A1
FR2421723A1 FR7908194A FR7908194A FR2421723A1 FR 2421723 A1 FR2421723 A1 FR 2421723A1 FR 7908194 A FR7908194 A FR 7908194A FR 7908194 A FR7908194 A FR 7908194A FR 2421723 A1 FR2421723 A1 FR 2421723A1
Authority
FR
France
Prior art keywords
screw
rib parts
longitudinal axis
screw extruder
flow divider
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.)
Granted
Application number
FR7908194A
Other languages
French (fr)
Other versions
FR2421723B1 (en
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.)
Cincinnati Milacron Austria GmbH
Original Assignee
Cincinnati Milacron Austria 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 Cincinnati Milacron Austria GmbH filed Critical Cincinnati Milacron Austria GmbH
Publication of FR2421723A1 publication Critical patent/FR2421723A1/en
Application granted granted Critical
Publication of FR2421723B1 publication Critical patent/FR2421723B1/fr
Granted legal-status Critical Current

Links

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
    • B29B7/30—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
    • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
    • B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
    • B29B7/482—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws provided with screw parts in addition to other mixing parts, e.g. paddles, gears, discs
    • 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
    • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
    • B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
    • B29B7/488—Parts, e.g. casings, sealings; Accessories, e.g. flow controlling or throttling 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
    • B29B7/34—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
    • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
    • B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
    • B29B7/488—Parts, e.g. casings, sealings; Accessories, e.g. flow controlling or throttling devices
    • B29B7/489—Screws
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B29C48/402—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders the screws having intermeshing parts
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/67—Screws having incorporated mixing devices not provided for in groups B29C48/52 - B29C48/66
    • 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

Abstract

Using the twin-screw extruder, it is intended to achieve an improved homogeneity of the plastic extrudate. To this end, each of the screws (1, 2) is provided at its outlet end with a melt-flow divider, the divider elements (10) of which are arranged so as to have a transport effect and to interact in a meshing manner. The melt flow divider of each screw (1, 2) consists of rib parts (10) aligned obliquely to the screw longitudinal axis, the rib parts (10) being designed with transport surfaces inclined with respect to the screw longitudinal axis. The rib parts of each screw are in each case arranged along a self-contained circumferential line.
FR7908194A 1978-04-03 1979-04-02 TWO-SCREW EXTRUDER Granted FR2421723A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0234478A AT384991B (en) 1978-04-03 1978-04-03 DOUBLE SCREW EXTRUDER

Publications (2)

Publication Number Publication Date
FR2421723A1 true FR2421723A1 (en) 1979-11-02
FR2421723B1 FR2421723B1 (en) 1985-03-08

Family

ID=3532598

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7908194A Granted FR2421723A1 (en) 1978-04-03 1979-04-02 TWO-SCREW EXTRUDER

Country Status (8)

Country Link
JP (1) JPS54135861A (en)
AR (1) AR216380A1 (en)
AT (1) AT384991B (en)
BR (1) BR7902018A (en)
CH (1) CH639596A5 (en)
DE (1) DE2911834A1 (en)
FR (1) FR2421723A1 (en)
IT (1) IT1118537B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0346757A2 (en) * 1988-06-15 1989-12-20 Krauss-Maffei Aktiengesellschaft Twin screw extruder

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014219706B3 (en) 2014-09-29 2016-03-31 Battenfeld-Cincinnati Austria Gmbh extruder screw

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2631016A (en) * 1949-07-15 1953-03-10 Laubarede Leonce Kraffe De Homogenizing device for extruding machines
FR1046246A (en) * 1951-06-01 1953-12-04 Plastic kneading and extrusion machine
FR1122654A (en) * 1955-02-28 1956-09-11 Machine for extruding thermoplastics under high pressure
FR2333636A1 (en) * 1975-12-05 1977-07-01 Bayer Ag DEVICE FOR THE EXTRUSION IN SEMI-PRODUCTS OF THERMOPLASTIC MATERIALS SENSITIVE TO HEAT
FR2342152A1 (en) * 1976-02-26 1977-09-23 Plast Elastverarbeitungsmasch MIXING ELEMENT AND SHEAR FOR PLASTIC MATERIAL PROCESSING EQUIPMENT

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3486194A (en) * 1967-08-07 1969-12-30 Clarence E Parks Extruder
DE2235784C3 (en) * 1972-07-21 1986-01-09 Uniroyal Englebert Reifen GmbH, 5100 Aachen Single-screw extruder for mixing and homogenizing high-viscosity rubber compounds and high-viscosity thermoplastics
DE2340499C2 (en) * 1973-08-10 1980-02-14 Barmag Barmer Maschinenfabrik Ag, 5600 Wuppertal extrusion press
DE2744583A1 (en) * 1977-10-04 1979-04-05 Heinz Dipl Ing Weber Twin-screw extruder with intermeshing mixing cams at metering section - to achieve complete compounding and avoid inhomogeneities of plastics melt

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2631016A (en) * 1949-07-15 1953-03-10 Laubarede Leonce Kraffe De Homogenizing device for extruding machines
FR1046246A (en) * 1951-06-01 1953-12-04 Plastic kneading and extrusion machine
FR1122654A (en) * 1955-02-28 1956-09-11 Machine for extruding thermoplastics under high pressure
FR2333636A1 (en) * 1975-12-05 1977-07-01 Bayer Ag DEVICE FOR THE EXTRUSION IN SEMI-PRODUCTS OF THERMOPLASTIC MATERIALS SENSITIVE TO HEAT
FR2342152A1 (en) * 1976-02-26 1977-09-23 Plast Elastverarbeitungsmasch MIXING ELEMENT AND SHEAR FOR PLASTIC MATERIAL PROCESSING EQUIPMENT

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0346757A2 (en) * 1988-06-15 1989-12-20 Krauss-Maffei Aktiengesellschaft Twin screw extruder
EP0346757A3 (en) * 1988-06-15 1991-02-06 Krauss-Maffei Aktiengesellschaft Twin screw extruder

Also Published As

Publication number Publication date
AR216380A1 (en) 1979-12-14
BR7902018A (en) 1979-11-27
FR2421723B1 (en) 1985-03-08
AT384991B (en) 1988-02-10
JPS54135861A (en) 1979-10-22
IT7967682A0 (en) 1979-04-02
IT1118537B (en) 1986-03-03
DE2911834A1 (en) 1979-10-04
ATA234478A (en) 1987-07-15
CH639596A5 (en) 1983-11-30

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Legal Events

Date Code Title Description
ST Notification of lapse