JPS5567420A - Continuous extrusion machine for foamed substance - Google Patents

Continuous extrusion machine for foamed substance

Info

Publication number
JPS5567420A
JPS5567420A JP14198578A JP14198578A JPS5567420A JP S5567420 A JPS5567420 A JP S5567420A JP 14198578 A JP14198578 A JP 14198578A JP 14198578 A JP14198578 A JP 14198578A JP S5567420 A JPS5567420 A JP S5567420A
Authority
JP
Japan
Prior art keywords
screw
flight
preferable
screw flight
extrusion machine
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.)
Granted
Application number
JP14198578A
Other languages
Japanese (ja)
Other versions
JPS6054174B2 (en
Inventor
Takeshi Aragai
Takashi Nagai
Hiroshi Shimoyama
Sadahito Kobori
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.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical 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 Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP53141985A priority Critical patent/JPS6054174B2/en
Publication of JPS5567420A publication Critical patent/JPS5567420A/en
Publication of JPS6054174B2 publication Critical patent/JPS6054174B2/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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
    • B29C44/50—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying
    • 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
    • B29C48/53—Screws having a varying channel depth, e.g. varying the diameter of the longitudinal screw trunk
    • 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
    • B29C48/55—Screws having reverse-feeding elements

Landscapes

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

Abstract

PURPOSE:To provide an extruder capable of dispersing uniformly gases such as carbon dioxide, nitrogen gas, propane, etc. by arranging a flight with a reverse screw lower than the screw flight on the screw between the inlet of the foaming agent and the outlet. CONSTITUTION:A raw material supplying opening 6 is equipped at one end of a cylinder 1, a metal mold 9 is arranged at the other end through an outlet 8, and a foaming agent injection port 7 is installed at the middle. Over all the length of the screw 2 connected with a driving device 5 is fitted a screw flight 3 and is fitted a flight 4 which is lower than the screw flight at the kneading zone 13 and has a reverse screw againt the screw flight. The pitch between the flights is preferable to be constant. The height of the reverse screw flight 4 is preferable to be lower than that of the screw flight 3 and more than one half the height is preferable.
JP53141985A 1978-11-16 1978-11-16 Continuous foam extrusion equipment Expired JPS6054174B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53141985A JPS6054174B2 (en) 1978-11-16 1978-11-16 Continuous foam extrusion equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53141985A JPS6054174B2 (en) 1978-11-16 1978-11-16 Continuous foam extrusion equipment

Publications (2)

Publication Number Publication Date
JPS5567420A true JPS5567420A (en) 1980-05-21
JPS6054174B2 JPS6054174B2 (en) 1985-11-29

Family

ID=15304707

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53141985A Expired JPS6054174B2 (en) 1978-11-16 1978-11-16 Continuous foam extrusion equipment

Country Status (1)

Country Link
JP (1) JPS6054174B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2312380B1 (en) 2001-02-27 2020-11-18 Dolby Laboratories Licensing Corporation A method and device for displaying an image
JP4348457B2 (en) 2002-03-13 2009-10-21 ドルビー ラボラトリーズ ライセンシング コーポレイション High dynamic range display, display controller, and image display method
US8687271B2 (en) 2002-03-13 2014-04-01 Dolby Laboratories Licensing Corporation N-modulation displays and related methods

Also Published As

Publication number Publication date
JPS6054174B2 (en) 1985-11-29

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