FR2243068A1 - Extruder screw for thermoplastics, duroplasts and elastomers - has improved homogenising efficiency and increased throughput rate - Google Patents

Extruder screw for thermoplastics, duroplasts and elastomers - has improved homogenising efficiency and increased throughput rate

Info

Publication number
FR2243068A1
FR2243068A1 FR7430340A FR7430340A FR2243068A1 FR 2243068 A1 FR2243068 A1 FR 2243068A1 FR 7430340 A FR7430340 A FR 7430340A FR 7430340 A FR7430340 A FR 7430340A FR 2243068 A1 FR2243068 A1 FR 2243068A1
Authority
FR
France
Prior art keywords
homogenising
efficiency
improved
throughput rate
increased throughput
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
FR7430340A
Other languages
French (fr)
Other versions
FR2243068B1 (en
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.)
Fried Krupp AG
Original Assignee
Fried Krupp AG
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 Fried Krupp AG filed Critical Fried Krupp AG
Publication of FR2243068A1 publication Critical patent/FR2243068A1/en
Application granted granted Critical
Publication of FR2243068B1 publication Critical patent/FR2243068B1/fr
Granted 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
    • B29C48/64—Screws with two or more threads
    • B29C48/65—Screws with two or more threads neighbouring threads or channels having different configurations, e.g. one thread being lower than its neighbouring thread
    • 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
    • B29C48/56—Screws having grooves or cavities other than the thread or the channel
    • 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)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

The screw has at least 1 mixing section along its length whose flight lands have a low helix angle (as compared with those of the conveying sections) whilst the diameter of core and barrel are constant. The construction ensures efficient operation over a wide range of processing parameter combinations, has improved homogenising efficiency and increased throughput rate. The screw channel lead (pitch) in the (pref. single-thread) mixing section is about 1/10 of that in the conveying sections and/or the depth of flight land is about the same.
FR7430340A 1973-09-08 1974-09-06 Extruder screw for thermoplastics, duroplasts and elastomers - has improved homogenising efficiency and increased throughput rate Granted FR2243068A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732345382 DE2345382A1 (en) 1973-09-08 1973-09-08 EXTRUDER SCREW

Publications (2)

Publication Number Publication Date
FR2243068A1 true FR2243068A1 (en) 1975-04-04
FR2243068B1 FR2243068B1 (en) 1977-10-28

Family

ID=5892035

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7430340A Granted FR2243068A1 (en) 1973-09-08 1974-09-06 Extruder screw for thermoplastics, duroplasts and elastomers - has improved homogenising efficiency and increased throughput rate

Country Status (2)

Country Link
DE (1) DE2345382A1 (en)
FR (1) FR2243068A1 (en)

Also Published As

Publication number Publication date
FR2243068B1 (en) 1977-10-28
DE2345382A1 (en) 1975-03-20

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Legal Events

Date Code Title Description
ST Notification of lapse