GB733911A - Apparatus and process for the extrusion treatment of plastic material - Google Patents

Apparatus and process for the extrusion treatment of plastic material

Info

Publication number
GB733911A
GB733911A GB26701/50A GB2670150A GB733911A GB 733911 A GB733911 A GB 733911A GB 26701/50 A GB26701/50 A GB 26701/50A GB 2670150 A GB2670150 A GB 2670150A GB 733911 A GB733911 A GB 733911A
Authority
GB
United Kingdom
Prior art keywords
flights
screw
block
reverse
region
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
Application number
GB26701/50A
Inventor
Lawrence J Fuller
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.)
Welding Engineers Inc
Original Assignee
Welding Engineers Inc
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
Priority to BE506118D priority Critical patent/BE506118A/xx
Priority to US593928A priority patent/US2615199A/en
Application filed by Welding Engineers Inc filed Critical Welding Engineers Inc
Priority to GB26701/50A priority patent/GB733911A/en
Priority to FR1048481D priority patent/FR1048481A/en
Publication of GB733911A publication Critical patent/GB733911A/en
Expired 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
    • B29B7/484—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 with two shafts provided with screws, e.g. one screw being shorter than the other
    • 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
    • B29C48/36—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
    • B29C48/395—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
    • B29C48/404—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 non-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
    • B29C48/55—Screws having reverse-feeding elements
    • 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
    • B29C48/625—Screws characterised by the ratio of the threaded length of the screw to its outside diameter [L/D ratio]
    • 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
    • B29C48/63—Screws having sections without mixing elements or threads, i.e. having cylinder shaped sections
    • 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
    • B29C48/76—Venting, drying means; Degassing means
    • 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
    • B29C2948/92514—Pressure
    • 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
    • B29C2948/92571—Position, e.g. linear or angular
    • 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
    • B29C2948/92857—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
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92895—Barrel or housing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

733,911. Mixing-appliances. WELDING ENGINEERS, Ltd. Nov. 1, 1950, No. 26701/50. Class 86. [Also in Groups I, V and XXX] Relates to apparatus for extruding thermosetting and thermoplastic resins, rubber, polybutene, &c. The apparatus mixes and kneads the material, generates heat therein and may extract water, gases, volatiles, &c. According to the invention, the extruding means comprises oppositely-rotating parallel screw flights 22, 23, Figs. 1 and 2, which feed the material to reversely-acting screw flights 31, 32 which exert a back pressure on the material, and from these reverse flights the material passes into a region 44 of lower pressure than that existing in the reverse flights. This region may be at atmospheric pressure or other pressure, e.g. partial vacuum, and volatiles may be removed as desired. The work done on the material heats it. Liquids are drained off around screw plugs 33. The material forced through the flights 31, 32 is fed by flights 46-19 through screen 51 and die 52. The time during which the material is confined in the reverse flights 31, 32 is regulated by varying the length of the cover surface 35. This surface is provided by a main block 37 and a supplementary block 39 having a liner 38 which may be replaced by a longer or shorter liner. Solid or fluid ingredients may be added at the opening 44 or at the hopper 27. The screw casing has a temperature-controlling jacket divided into independently-controllable sections 53-58. When thermo-setting material or rubber is being extruded it may pass from the die to a hot zone to complete the setting or vulcanization. The cover surface 35 may be formed by a block vertically adjustable by screw means having an indicating dial (Figs. 4 and 5, not shown). Figs. 6 and 7 show a modification in which bypass conduits 81, 81a connect the reverse flights 77, 78 with a region 83 of low pressure positioned near forward flight 84. A screen 85 is disposed across the entrance to region 83. A perforated partition 88 separates the forward parts of the two screws 71, 72, which include also reverse flights 86, 89, and 93. Figs. 8 and 10 show a modification in which a relief passage 108<SP>1</SP> is provided in a by-pass block 108, to transfer material from reverse flights 104 to forwarding flights 110. A perforated screen 98 extends between forwarding flight 111 and reversing flight 117. Fluids escape through openings 99, 116, 145. In Fig. 9 (not shown), the block 108 is on the underside of the screw. Figs. 11-15 (not shown) illustrate the by-pass blocks in more detail. Fig. 17 shows screws having cylinders 159 which sheet the material. In Fig. 20 the back pressure is controlled by a screw-operated block 169, the flights 167 and 168 are staggered to grip the material along zigzag lines and carry it forward, and a cover 175 has an outlet 176 for release of volatiles under vacuum.
GB26701/50A 1945-05-15 1950-11-01 Apparatus and process for the extrusion treatment of plastic material Expired GB733911A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE506118D BE506118A (en) 1950-11-01
US593928A US2615199A (en) 1945-05-15 1945-05-15 Material treating apparatus
GB26701/50A GB733911A (en) 1950-11-01 1950-11-01 Apparatus and process for the extrusion treatment of plastic material
FR1048481D FR1048481A (en) 1950-11-01 1951-09-18 Plastics processing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB26701/50A GB733911A (en) 1950-11-01 1950-11-01 Apparatus and process for the extrusion treatment of plastic material

Publications (1)

Publication Number Publication Date
GB733911A true GB733911A (en) 1955-07-20

Family

ID=10247854

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26701/50A Expired GB733911A (en) 1945-05-15 1950-11-01 Apparatus and process for the extrusion treatment of plastic material

Country Status (3)

Country Link
BE (1) BE506118A (en)
FR (1) FR1048481A (en)
GB (1) GB733911A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119271A (en) * 1982-04-26 1983-11-16 Pomini Farrel Spa Mixing machine
EP0623447A1 (en) * 1993-04-28 1994-11-09 Rohm And Haas Company Extruder
GB2301795A (en) * 1995-06-07 1996-12-18 Trim Masters Int Ltd Polymer extruder feed with wiping action
WO2013013916A1 (en) * 2011-07-27 2013-01-31 Starlinger & Co Gesellschaft M.B.H. Device for degassing thermoplastic extrudate
PL422984A1 (en) * 2017-09-27 2019-04-08 Galas Adam Sławomir Device for mixing and extrusion of materials, preferably plastic materials

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1132318B (en) * 1955-10-26 1962-06-28 Wacker Chemie Gmbh Drying of vinyl suspension and emulsion polymers
BE570207A (en) * 1957-08-15 1900-01-01
DE1111807B (en) * 1958-05-28 1961-07-27 Wacker Chemie Gmbh Device for processing and subsequent further processing or further treatment of thermoplastic plastics
BE604594A (en) * 1960-06-02 1900-01-01
DE1167009B (en) * 1961-04-15 1964-04-02 Basf Ag Screw press for the gentle processing of plastic raw materials
NL7413965A (en) * 1974-10-24 1976-04-27 Wavin Bv EXTRUDER WITH DEGASING.
NL1003289C2 (en) * 1996-06-06 1997-12-10 Beek B V Van The mixing of stiff materials - with good product homogeneity.
FR3130183B1 (en) * 2021-12-09 2024-08-09 Univ Jean Monnet Saint Etienne Twin-screw extrusion process for wood pellets

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119271A (en) * 1982-04-26 1983-11-16 Pomini Farrel Spa Mixing machine
EP0623447A1 (en) * 1993-04-28 1994-11-09 Rohm And Haas Company Extruder
GB2301795A (en) * 1995-06-07 1996-12-18 Trim Masters Int Ltd Polymer extruder feed with wiping action
GB2301795B (en) * 1995-06-07 2000-01-19 Trim Masters Int Ltd Polymer processing apparatus and method
WO2013013916A1 (en) * 2011-07-27 2013-01-31 Starlinger & Co Gesellschaft M.B.H. Device for degassing thermoplastic extrudate
PL422984A1 (en) * 2017-09-27 2019-04-08 Galas Adam Sławomir Device for mixing and extrusion of materials, preferably plastic materials

Also Published As

Publication number Publication date
BE506118A (en) 1900-01-01
FR1048481A (en) 1953-12-22

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