JPS56115238A - Screw extruder for thermoplastic resin - Google Patents

Screw extruder for thermoplastic resin

Info

Publication number
JPS56115238A
JPS56115238A JP1953980A JP1953980A JPS56115238A JP S56115238 A JPS56115238 A JP S56115238A JP 1953980 A JP1953980 A JP 1953980A JP 1953980 A JP1953980 A JP 1953980A JP S56115238 A JPS56115238 A JP S56115238A
Authority
JP
Japan
Prior art keywords
screw
clearance surfaces
slit clearance
slit
thermoplastic resin
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
JP1953980A
Other languages
Japanese (ja)
Inventor
Toyoji Tamura
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.)
Japan Steel Works Ltd
Original Assignee
Japan Steel 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 Japan Steel Works Ltd filed Critical Japan Steel Works Ltd
Priority to JP1953980A priority Critical patent/JPS56115238A/en
Publication of JPS56115238A publication Critical patent/JPS56115238A/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
    • B29C48/67—Screws having incorporated mixing devices not provided for in groups B29C48/52 - B29C48/66
    • 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
    • B29C48/03—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 increase the extrusion speed of a screw extruder for thermoplastic resin by forming slit clearance surfaces not in the direction of the axis of the screw shaft but on its circumference into ring shapes and providing screw rings so as to contact with each other in order to lengthen the overall length of the slit clearance surfaces. CONSTITUTION:On a screw shaft 9, screw rings 10-13 are secured contacting with each other, and ring-shaped slit clearances 20', 24' and 27' are formed on their circumferences. The resin raw material flowing in from the upstream side 6 is inevitably passed through either of the slit clearance surfaces 20', 24' and 27' in the kneading and homogenizing area and allowed to flow to the downstream side. Side homogenizing is performed being divided into three for the screw rings 10, 12 and 13 respectively. The longer the circumferential overall length of the slit clearance surfaces 20', 24' and 27' the smaller the decrease in the extrusion rate when the resin is kneaded and homogenized.
JP1953980A 1980-02-18 1980-02-18 Screw extruder for thermoplastic resin Pending JPS56115238A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1953980A JPS56115238A (en) 1980-02-18 1980-02-18 Screw extruder for thermoplastic resin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1953980A JPS56115238A (en) 1980-02-18 1980-02-18 Screw extruder for thermoplastic resin

Publications (1)

Publication Number Publication Date
JPS56115238A true JPS56115238A (en) 1981-09-10

Family

ID=12002116

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1953980A Pending JPS56115238A (en) 1980-02-18 1980-02-18 Screw extruder for thermoplastic resin

Country Status (1)

Country Link
JP (1) JPS56115238A (en)

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