JPS5656841A - Structure of screw for extrusion molding machine - Google Patents

Structure of screw for extrusion molding machine

Info

Publication number
JPS5656841A
JPS5656841A JP13317479A JP13317479A JPS5656841A JP S5656841 A JPS5656841 A JP S5656841A JP 13317479 A JP13317479 A JP 13317479A JP 13317479 A JP13317479 A JP 13317479A JP S5656841 A JPS5656841 A JP S5656841A
Authority
JP
Japan
Prior art keywords
flights
screw
molding materials
pitches
flight
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
JP13317479A
Other languages
Japanese (ja)
Inventor
Tadashi Sato
Toshiyuki Akamatsu
Hiroaki Usui
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP13317479A priority Critical patent/JPS5656841A/en
Publication of JPS5656841A publication Critical patent/JPS5656841A/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
    • B29C48/42—Non-identical or non-mirrored 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
    • B29C48/25—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
    • B29C48/41—Intermeshing counter-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 obtain a captioned structure improved in mixing and kneading efficiencies by a method wherein one of pitches of spiral flights of screw shafts is made one half of the same of the other. CONSTITUTION:Molding materials are supplied into a barrel 5 through a hopper and screw shafts 3, 4 having spiral flights 1, 2 are rotated to heat and knead them, subsequently, the molten molding materials are molded by extruding from a die. In this case, a pitch of the flight 2 is made one half of the same of the flight 1 and the respective flights 1, 2 are slidingly contacted with an internal peripheral surface of the barrel 5 and an outer peripheral surface of the other screw shaft. Since the pitches of the flights 1, 2 are different, a flow of the molding materials is made complicated and they are mixed by turbulent flows, accordingly, a kneading efficiency is improved and setting up, decomposition or the like of the materials may be prevented.
JP13317479A 1979-10-15 1979-10-15 Structure of screw for extrusion molding machine Pending JPS5656841A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13317479A JPS5656841A (en) 1979-10-15 1979-10-15 Structure of screw for extrusion molding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13317479A JPS5656841A (en) 1979-10-15 1979-10-15 Structure of screw for extrusion molding machine

Publications (1)

Publication Number Publication Date
JPS5656841A true JPS5656841A (en) 1981-05-19

Family

ID=15098397

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13317479A Pending JPS5656841A (en) 1979-10-15 1979-10-15 Structure of screw for extrusion molding machine

Country Status (1)

Country Link
JP (1) JPS5656841A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998013189A1 (en) * 1996-09-24 1998-04-02 The Dow Chemical Company Multiple-screw extruder
EP2769621A3 (en) * 2013-02-26 2015-12-02 VEMAG Maschinenbau GmbH Arrangement of tightly closed screw conveyors

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998013189A1 (en) * 1996-09-24 1998-04-02 The Dow Chemical Company Multiple-screw extruder
US6022133A (en) * 1996-09-24 2000-02-08 The Dow Chemical Company Multiple-screw extruder
EP2769621A3 (en) * 2013-02-26 2015-12-02 VEMAG Maschinenbau GmbH Arrangement of tightly closed screw conveyors

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