FR2311653A1 - Long single screw adiabatic extruder of high efficiency - suitable for several grades of thermoplastics - Google Patents
Long single screw adiabatic extruder of high efficiency - suitable for several grades of thermoplasticsInfo
- Publication number
- FR2311653A1 FR2311653A1 FR7516547A FR7516547A FR2311653A1 FR 2311653 A1 FR2311653 A1 FR 2311653A1 FR 7516547 A FR7516547 A FR 7516547A FR 7516547 A FR7516547 A FR 7516547A FR 2311653 A1 FR2311653 A1 FR 2311653A1
- Authority
- FR
- France
- Prior art keywords
- extruder
- screw
- thermoplastics
- high efficiency
- adiabatic
- 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- Withdrawn
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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/68—Barrels or cylinders
- B29C48/685—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads
- B29C48/686—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads having grooves or cavities
-
- 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
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/56—Screws having grooves or cavities other than the thread or the channel
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Extruder for adiabatic extrusion of thermoplastics (e.g. polyethylene), has a screw with an L/D ratio between 28 and 35 and small clearances, i.e. 0.03-0.1 mm, between the screw flights and the barrel along the feed and compression zones. The compression ratio is 2.5-2.8. The screw has a melt calibration zone of constant depth with flight/barrel clearances pref. 0.4-0.6 mm. The screw can be driven at >=350 r/min. Extruder is capable of higher and more efficient outputs than conventional adiabatic extruder with shorter screws and greater flight/barrel clearances. The relatively long compression and calibration zones and coolant control allow the machine to be set to process more than one grade of material.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7516547A FR2311653A1 (en) | 1975-05-21 | 1975-05-21 | Long single screw adiabatic extruder of high efficiency - suitable for several grades of thermoplastics |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7516547A FR2311653A1 (en) | 1975-05-21 | 1975-05-21 | Long single screw adiabatic extruder of high efficiency - suitable for several grades of thermoplastics |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2311653A1 true FR2311653A1 (en) | 1976-12-17 |
Family
ID=9155737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7516547A Withdrawn FR2311653A1 (en) | 1975-05-21 | 1975-05-21 | Long single screw adiabatic extruder of high efficiency - suitable for several grades of thermoplastics |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2311653A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2380857A1 (en) * | 1977-02-17 | 1978-09-15 | Dynamit Nobel Ag | METHOD AND DEVICE FOR INCORPORATING GLASS FIBERS IN THERMOPLASTIC MATERIALS |
EP0051543A2 (en) * | 1980-11-04 | 1982-05-12 | Union Carbide Corporation | Low-energy extruder-pump system |
EP0124020A2 (en) * | 1983-04-29 | 1984-11-07 | Christiaan Johan Rauwendaal | Extruder screw |
WO2001043559A2 (en) * | 1999-12-16 | 2001-06-21 | Unilever N.V. | Process and equipment for the manufacture of edible spreads |
-
1975
- 1975-05-21 FR FR7516547A patent/FR2311653A1/en not_active Withdrawn
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2380857A1 (en) * | 1977-02-17 | 1978-09-15 | Dynamit Nobel Ag | METHOD AND DEVICE FOR INCORPORATING GLASS FIBERS IN THERMOPLASTIC MATERIALS |
EP0051543A2 (en) * | 1980-11-04 | 1982-05-12 | Union Carbide Corporation | Low-energy extruder-pump system |
EP0051543A3 (en) * | 1980-11-04 | 1983-06-29 | Union Carbide Corporation | Low-energy extruder-pump system |
EP0124020A2 (en) * | 1983-04-29 | 1984-11-07 | Christiaan Johan Rauwendaal | Extruder screw |
EP0124020A3 (en) * | 1983-04-29 | 1985-07-24 | Christiaan Johan Rauwendaal | Extruder screw |
WO2001043559A2 (en) * | 1999-12-16 | 2001-06-21 | Unilever N.V. | Process and equipment for the manufacture of edible spreads |
WO2001043559A3 (en) * | 1999-12-16 | 2002-05-10 | Unilever Nv | Process and equipment for the manufacture of edible spreads |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |