GB1434368A - Feed screws and apparatus such as extrusion machines especially fo working plastics materials - Google Patents
Feed screws and apparatus such as extrusion machines especially fo working plastics materialsInfo
- Publication number
- GB1434368A GB1434368A GB2825772A GB2825772A GB1434368A GB 1434368 A GB1434368 A GB 1434368A GB 2825772 A GB2825772 A GB 2825772A GB 2825772 A GB2825772 A GB 2825772A GB 1434368 A GB1434368 A GB 1434368A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screw
- channel
- location
- portions
- constant
- 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.)
- Expired
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
- B29C48/505—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
- B29C48/03—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
1434368 Extruder screw K R MATTHEWS & CO (WORCESTER) Ltd 13 June 1973 [16 June 1972] 28257/72 Heading B5A An extruder screw comprises a melting zone Z in which particles of plastics are melted by conduction through the extruder barrel, with the melt being progressively transferred from a trailing portion t of the channel 22b, Fig. 6, which is of continuously decreasing depth, to a leading co-extensive portion l of the channel 22b which is of continuously increasing depth. The portions t and l are defined between medial channel locations Al, Bl, by a portion 20b of the screw thread 20, which is of a greater pitch than the thread portions 20a, 20c, upstream and downstream thereof, so that the boundary between the portions t and l is defined at the pitch of the portions 20a, 20c, and the portion t is of a width which is constant to a median channel location M and thereafter decreases to the location B1, and the portion l is of a width which decreases to the location M and is constant thereafter, the depths being equal at the location M and the channel 22b being of substantially constant cross-sectional area throughout the zone Z. The region Z is provided with intermediate feed and delivery regions X and Y, in which the threads 20a, 20c are of the same constant pitch and the screw channnels 22a, 22c are respectively of constant and decreasing channel depth. More than one zone Z may be provided along the screw, and a zone Z may be provided in a multiple thread screw. Heating and cooling means are provided for the extruder, and in the screw may be provided by fluid circulation through an axial passage or passages.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2825772A GB1434368A (en) | 1972-06-16 | 1972-06-16 | Feed screws and apparatus such as extrusion machines especially fo working plastics materials |
DE2329754A DE2329754A1 (en) | 1972-06-16 | 1973-06-12 | FEEDER SCREW FOR EXTRUSION MACHINES AND THE LIKE |
IT50768/73A IT985680B (en) | 1972-06-16 | 1973-06-13 | AUGER FOR EXTRUSION MACHINE AND SIMILAR |
CH863073A CH557737A (en) | 1972-06-16 | 1973-06-14 | CONVEYOR SCREW FOR EXTRUSION MACHINES. |
FR7321895A FR2189201B1 (en) | 1972-06-16 | 1973-06-15 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2825772A GB1434368A (en) | 1972-06-16 | 1972-06-16 | Feed screws and apparatus such as extrusion machines especially fo working plastics materials |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1434368A true GB1434368A (en) | 1976-05-05 |
Family
ID=10272791
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2825772A Expired GB1434368A (en) | 1972-06-16 | 1972-06-16 | Feed screws and apparatus such as extrusion machines especially fo working plastics materials |
Country Status (5)
Country | Link |
---|---|
CH (1) | CH557737A (en) |
DE (1) | DE2329754A1 (en) |
FR (1) | FR2189201B1 (en) |
GB (1) | GB1434368A (en) |
IT (1) | IT985680B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2184976A (en) * | 1985-12-31 | 1987-07-08 | Alphair Ventilating Systems | Rotatable extrusion auger for slide casting of concrete |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2542515C3 (en) * | 1975-09-24 | 1980-09-04 | Paul Troester Maschinenfabrik, 3000 Hannover | Extruder screw for processing plastics and rubber |
-
1972
- 1972-06-16 GB GB2825772A patent/GB1434368A/en not_active Expired
-
1973
- 1973-06-12 DE DE2329754A patent/DE2329754A1/en active Pending
- 1973-06-13 IT IT50768/73A patent/IT985680B/en active
- 1973-06-14 CH CH863073A patent/CH557737A/en not_active IP Right Cessation
- 1973-06-15 FR FR7321895A patent/FR2189201B1/fr not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2184976A (en) * | 1985-12-31 | 1987-07-08 | Alphair Ventilating Systems | Rotatable extrusion auger for slide casting of concrete |
GB2184976B (en) * | 1985-12-31 | 1990-03-21 | Alphair Ventilating Systems | Improvements in auger construction for machines for forming hollow core concrete slabs |
Also Published As
Publication number | Publication date |
---|---|
CH557737A (en) | 1975-01-15 |
FR2189201A1 (en) | 1974-01-25 |
DE2329754A1 (en) | 1974-01-03 |
FR2189201B1 (en) | 1976-09-17 |
IT985680B (en) | 1974-12-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3652064A (en) | Apparatus for conveying plastic material | |
US3650652A (en) | Apparatus for extruding plastic material | |
GB1270168A (en) | Screw extruder | |
US3632255A (en) | Extrusion apparatus | |
GB1059595A (en) | Improvements in or relating to worm extruders | |
GB964428A (en) | ||
US2441222A (en) | Extruder | |
GB1413378A (en) | Extruders | |
GB1301628A (en) | ||
US3300810A (en) | Extruder | |
US3788614A (en) | Mixing section for extruder feed screw | |
GB1438707A (en) | Extrusion moulding machines | |
US4015926A (en) | Multiple strand die head | |
GB1103925A (en) | Improvements relating to screw extruders | |
US3284848A (en) | Extruding apparatus | |
US4569595A (en) | Screw extruder for plastics | |
US3475787A (en) | Extruder | |
GB1434368A (en) | Feed screws and apparatus such as extrusion machines especially fo working plastics materials | |
GB1507826A (en) | Extruders and injection moulding machines | |
GB1190418A (en) | A Screw Conveyor Device with a Hydrostatic Thrust Bearing | |
US3655313A (en) | Plastic injection molding apparatus | |
US3897938A (en) | Apparatus for refining polymeric material | |
GB1178266A (en) | Improvements in or relating to Extruders. | |
CN102039657B (en) | Extrusion moulding apparatus for large-scale macromolecular product and process thereof | |
GB1245815A (en) | Screw extruder |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |