JPS5581131A - Multi-shaft extruder screw - Google Patents

Multi-shaft extruder screw

Info

Publication number
JPS5581131A
JPS5581131A JP15669678A JP15669678A JPS5581131A JP S5581131 A JPS5581131 A JP S5581131A JP 15669678 A JP15669678 A JP 15669678A JP 15669678 A JP15669678 A JP 15669678A JP S5581131 A JPS5581131 A JP S5581131A
Authority
JP
Japan
Prior art keywords
screw
thread
resin
flight
back flow
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
JP15669678A
Other languages
Japanese (ja)
Inventor
Yasuo Tsuchiya
Kikuo Tamura
Akinori Ide
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 JP15669678A priority Critical patent/JPS5581131A/en
Publication of JPS5581131A publication Critical patent/JPS5581131A/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
    • B29C48/395—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
    • 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

PURPOSE:To provide a multi-shaft extruder screw of good gripping at feed portion and reduced back flow by engaging right and left turning screws of specified constitution with each other. CONSTITUTION:A right turn screw 11 having a large flight groove width and a small thread width is engaged perfectly with a left turn screw 12 having a large flight thread width and a small groove width. The screw 11, similar to a single- shaft screw, has a function of feeding a raw material resin forward. The screw 12 has a flight land portion 14, which perfectly engages a thread bottom portion 13 of the screw 11, and a groove portion 16 which engages a flight thread portion 15 of the screw 11. Therefore the raw material resin is fed from the thread bottom portion 13 to the groove portion 16 and carried forward. The groove portion 16 is substantially full of the resin fed from the thread bottom portion 13 and feeds the resin forward. Unlike conventional screws, the volume of the groove portion is not large, there is no gap nor back flow, the flight thread portion 15 in the groove portion 16 functions as a resin against back flow, and heating of the resin due to back flow is prevented.
JP15669678A 1978-12-15 1978-12-15 Multi-shaft extruder screw Pending JPS5581131A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15669678A JPS5581131A (en) 1978-12-15 1978-12-15 Multi-shaft extruder screw

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15669678A JPS5581131A (en) 1978-12-15 1978-12-15 Multi-shaft extruder screw

Publications (1)

Publication Number Publication Date
JPS5581131A true JPS5581131A (en) 1980-06-18

Family

ID=15633332

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15669678A Pending JPS5581131A (en) 1978-12-15 1978-12-15 Multi-shaft extruder screw

Country Status (1)

Country Link
JP (1) JPS5581131A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5999724U (en) * 1982-12-24 1984-07-05 株式会社日本製鋼所 twin screw extruder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5999724U (en) * 1982-12-24 1984-07-05 株式会社日本製鋼所 twin screw extruder

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