JPS57187230A - Twin-screw extruder - Google Patents

Twin-screw extruder

Info

Publication number
JPS57187230A
JPS57187230A JP56071923A JP7192381A JPS57187230A JP S57187230 A JPS57187230 A JP S57187230A JP 56071923 A JP56071923 A JP 56071923A JP 7192381 A JP7192381 A JP 7192381A JP S57187230 A JPS57187230 A JP S57187230A
Authority
JP
Japan
Prior art keywords
screw
supply port
port
twin
down stream
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.)
Pending
Application number
JP56071923A
Other languages
Japanese (ja)
Inventor
Katsuichi Tanaka
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.)
Shibaura Machine Co Ltd
Original Assignee
Toshiba Machine Co 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 Toshiba Machine Co Ltd filed Critical Toshiba Machine Co Ltd
Priority to JP56071923A priority Critical patent/JPS57187230A/en
Publication of JPS57187230A publication Critical patent/JPS57187230A/en
Pending 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
    • B29C48/505—Screws
    • B29C48/57—Screws provided with kneading disc-like elements, e.g. with oval-shaped 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
    • B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
    • B29C48/39—Plasticisers, homogenisers or feeders comprising two or more stages a first extruder feeding the melt into an intermediate location of a second extruder
    • 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
    • B29C48/535—Screws with thread pitch varying along the longitudinal axis
    • 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
    • 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
    • B29C48/405—Intermeshing co-rotating screws

Abstract

PURPOSE:To obtain a twin-screw extruder which prevents degradation due to oxidation or moisture of material in the extruder and is made low cost by a simple construction, by providing an inert gas introducing port at the cylinder wall in the down stream from a material supply port. CONSTITUTION:A single screw feeder 13 is installed above a supply port 11 via a chute 12 and plastics material 15 within a hopper 14 is supplied in the cyliner 16 of a twin-screw extruder and conveyed by a screw 16 to a down stream, being heated by the outside peripheral heater of the cylinder 16. Meanwhile, inert gas of N2 etc. is supplied from the introducing port 18 provided at the down stream of the cylinder 16 parting from the supply port 11, made to flow as a counter current against material and discharged to the outside from the gas discharging port provided at the chute 12 or from the hopper 14 via the screw feeder 13. In this case, in order to avoid substantial stoppage of gas between the introducing port 18 and the supply port 11, the torsional angle phi of the screw or a pitch is chosen so as a filling factor S of material within a screw groove is made below 1.
JP56071923A 1981-05-13 1981-05-13 Twin-screw extruder Pending JPS57187230A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56071923A JPS57187230A (en) 1981-05-13 1981-05-13 Twin-screw extruder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56071923A JPS57187230A (en) 1981-05-13 1981-05-13 Twin-screw extruder

Publications (1)

Publication Number Publication Date
JPS57187230A true JPS57187230A (en) 1982-11-17

Family

ID=13474532

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56071923A Pending JPS57187230A (en) 1981-05-13 1981-05-13 Twin-screw extruder

Country Status (1)

Country Link
JP (1) JPS57187230A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0376623A (en) * 1989-08-21 1991-04-02 Fujikura Ltd Extrusion of resin incorporated with crosslinking agent
CN102615800A (en) * 2012-03-27 2012-08-01 昆山科信橡塑机械有限公司 Sheet forming extrusion unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0376623A (en) * 1989-08-21 1991-04-02 Fujikura Ltd Extrusion of resin incorporated with crosslinking agent
CN102615800A (en) * 2012-03-27 2012-08-01 昆山科信橡塑机械有限公司 Sheet forming extrusion unit

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