GB836133A - Improvements in the extrusion of organic thermoplastic materials - Google Patents

Improvements in the extrusion of organic thermoplastic materials

Info

Publication number
GB836133A
GB836133A GB370/57A GB37057A GB836133A GB 836133 A GB836133 A GB 836133A GB 370/57 A GB370/57 A GB 370/57A GB 37057 A GB37057 A GB 37057A GB 836133 A GB836133 A GB 836133A
Authority
GB
United Kingdom
Prior art keywords
screw
passageway
thermoplastic materials
extrusion
pict
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
GB370/57A
Inventor
Thomas Alfred Stanley
David John Weeks
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB370/57A priority Critical patent/GB836133A/en
Publication of GB836133A publication Critical patent/GB836133A/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
    • 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
    • B29C48/765—Venting, drying means; Degassing means in the extruder apparatus
    • B29C48/766—Venting, drying means; Degassing means in the extruder apparatus in 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
    • B29C48/03—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
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/58—Screws provided with seal ring elements, i.e. elements of generally circular and tapered shape for preventing the back flow of the melt

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

<PICT:0836133/IV (a)/1> <PICT:0836133/IV (a)/2> An extrusion apparatus has a screw 2 with a substantially uniform pitch and depth of flight from its feed end to at least the end of its melting zone and a passageway 4 in the screw, for the removal of volatile matter, the passageway being connected by an orifice or orifices to at least one of the spaces between the flights of the screw situated beyond the melting zone and before the zone at the delivery end of the screw, where the flow of plastic material along the screw is restricted. There may be more than one such screw, which may have cooling channels therein. The passageway 4 may be connected to a source of vacuum and the volatile matter may be condensed. The screw may have a notch in a flight (Fig. 2). The cylinder may be differentially heated. The apparatus is particularly useful for extruding thermoplastic materials containing water or organic solvents.
GB370/57A 1957-01-03 1957-01-03 Improvements in the extrusion of organic thermoplastic materials Expired GB836133A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB370/57A GB836133A (en) 1957-01-03 1957-01-03 Improvements in the extrusion of organic thermoplastic materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB370/57A GB836133A (en) 1957-01-03 1957-01-03 Improvements in the extrusion of organic thermoplastic materials

Publications (1)

Publication Number Publication Date
GB836133A true GB836133A (en) 1960-06-01

Family

ID=9703221

Family Applications (1)

Application Number Title Priority Date Filing Date
GB370/57A Expired GB836133A (en) 1957-01-03 1957-01-03 Improvements in the extrusion of organic thermoplastic materials

Country Status (1)

Country Link
GB (1) GB836133A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1168076B (en) * 1961-12-22 1964-04-16 Bayer Ag Device for degassing plastic melts which tend to foam
WO2012168671A1 (en) * 2011-06-09 2012-12-13 Technip France Assembly and method for manufacturing a tubular sheath

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1168076B (en) * 1961-12-22 1964-04-16 Bayer Ag Device for degassing plastic melts which tend to foam
WO2012168671A1 (en) * 2011-06-09 2012-12-13 Technip France Assembly and method for manufacturing a tubular sheath
FR2976210A1 (en) * 2011-06-09 2012-12-14 Technip France ASSEMBLY AND METHOD FOR MANUFACTURING A TUBULAR SHEATH
FR2976209A1 (en) * 2011-06-09 2012-12-14 Technip France TUBULAR SHEATH EXTRUSION INSTALLATION

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