JPS5557445A - Screw for forming plastics - Google Patents

Screw for forming plastics

Info

Publication number
JPS5557445A
JPS5557445A JP13066378A JP13066378A JPS5557445A JP S5557445 A JPS5557445 A JP S5557445A JP 13066378 A JP13066378 A JP 13066378A JP 13066378 A JP13066378 A JP 13066378A JP S5557445 A JPS5557445 A JP S5557445A
Authority
JP
Japan
Prior art keywords
screw
axes
polygonal
root diameter
diameter parts
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
JP13066378A
Other languages
Japanese (ja)
Inventor
Taketoshi Ishikawa
Misoji Hasegawa
Fumitaka Tsuchiya
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 JP13066378A priority Critical patent/JPS5557445A/en
Publication of JPS5557445A publication Critical patent/JPS5557445A/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
    • B29C48/62—Screws characterised by the shape of the thread channel, e.g. U-shaped
    • 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 prevent the heat generation of resin and increase mixing effect by making the cross-sectional form of a screw perpendicular to its axis into a polygonal form and inclining the axes of root diameter parts to the screw axis. CONSTITUTION:The screw root diameter parts 3 of a part or the whole of a screw 1 perpendicular to the axes are made into polygonal forms or plygon like forms. The axes of the polygonal root diameter parts 3 are inclined to the screw axis 5 by an angle theta. Therefore, the depth of the screw grooves increases and decreases alternately along the screw flight 2 as shown in figures A-C, and at the same time, changes in the axial direction, and the depths of the tops of the groove corners have a relation a<c<d<b. By so doing, resin in the screw grooves undergoes compression shearing owing to the change of the inclination direction in the flight direction and the change of the groove depth, and is mixed sufficiently, therefore, mixing effect is increased and large extrusion quantities can be obtained without excessive heat generation even if the grooves are made deep.
JP13066378A 1978-10-24 1978-10-24 Screw for forming plastics Pending JPS5557445A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13066378A JPS5557445A (en) 1978-10-24 1978-10-24 Screw for forming plastics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13066378A JPS5557445A (en) 1978-10-24 1978-10-24 Screw for forming plastics

Publications (1)

Publication Number Publication Date
JPS5557445A true JPS5557445A (en) 1980-04-28

Family

ID=15039627

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13066378A Pending JPS5557445A (en) 1978-10-24 1978-10-24 Screw for forming plastics

Country Status (1)

Country Link
JP (1) JPS5557445A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016053240A1 (en) * 2014-09-29 2016-04-07 Compagnie Generale Des Etablissements Michelin Extruder screw element

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5232777A (en) * 1975-09-02 1977-03-12 Toyo Seikan Kaisha Ltd Method of producing 188liter can using bonding agent
JPS5285256A (en) * 1976-01-09 1977-07-15 Ube Industries Resin molding machine screw

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5232777A (en) * 1975-09-02 1977-03-12 Toyo Seikan Kaisha Ltd Method of producing 188liter can using bonding agent
JPS5285256A (en) * 1976-01-09 1977-07-15 Ube Industries Resin molding machine screw

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016053240A1 (en) * 2014-09-29 2016-04-07 Compagnie Generale Des Etablissements Michelin Extruder screw element
CN106715079A (en) * 2014-09-29 2017-05-24 米其林集团总公司 Screw element for an extruder
US10272608B2 (en) 2014-09-29 2019-04-30 Compagnie Generale Des Etablissements Michelin Extruder screw element

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