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NL7514415A - Continuous control of gelation speed in thermoplastic extrusion - by regulating lubricant feed pref. in dependence on extrusion temp. - Google Patents

Continuous control of gelation speed in thermoplastic extrusion - by regulating lubricant feed pref. in dependence on extrusion temp.

Info

Publication number
NL7514415A
NL7514415A NL7514415A NL7514415A NL7514415A NL 7514415 A NL7514415 A NL 7514415A NL 7514415 A NL7514415 A NL 7514415A NL 7514415 A NL7514415 A NL 7514415A NL 7514415 A NL7514415 A NL 7514415A
Authority
NL
Netherlands
Prior art keywords
speed
extrusion
temp
lubricant
gelation
Prior art date
Application number
NL7514415A
Other languages
Dutch (nl)
Original Assignee
Wavin Bv
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 Wavin Bv filed Critical Wavin Bv
Priority to NL7514415A priority Critical patent/NL7514415A/en
Publication of NL7514415A publication Critical patent/NL7514415A/en

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
    • B29C48/92—Measuring, controlling or regulating
    • 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
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/286—Raw material dosing
    • 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
    • B29C48/94—Lubricating
    • B29C48/95—Lubricating by adding lubricant to the moulding material
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92047—Energy, power, electric current or voltage
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B29C2948/926—Flow or feed rate
    • 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

Articles of synthetic material are produced by extruding a thermoplastic mass to which a lubricant is added, with continuous control of the speed of gelation. This is maintained uniformly constant by the metered addition of a lubricant which is thoroughly mixed into the feed before it reaches the plasticising zone. The amt. of lubricant delivered is determined by the measurement of the energy consumption of the extruder worm and/or the temp. of the prod. at the nozzle outlet. The speed of gelation can be kept constant without long intervals elapsing between the detection of a falling off in speed and the rectification of the situation. The gelation speed is held constant to great advantage by regulating the input of lubricant in parallel with the temp. of the extruded material.
NL7514415A 1975-12-10 1975-12-10 Continuous control of gelation speed in thermoplastic extrusion - by regulating lubricant feed pref. in dependence on extrusion temp. NL7514415A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7514415A NL7514415A (en) 1975-12-10 1975-12-10 Continuous control of gelation speed in thermoplastic extrusion - by regulating lubricant feed pref. in dependence on extrusion temp.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7514415A NL7514415A (en) 1975-12-10 1975-12-10 Continuous control of gelation speed in thermoplastic extrusion - by regulating lubricant feed pref. in dependence on extrusion temp.

Publications (1)

Publication Number Publication Date
NL7514415A true NL7514415A (en) 1977-06-14

Family

ID=19825004

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7514415A NL7514415A (en) 1975-12-10 1975-12-10 Continuous control of gelation speed in thermoplastic extrusion - by regulating lubricant feed pref. in dependence on extrusion temp.

Country Status (1)

Country Link
NL (1) NL7514415A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0114620A2 (en) * 1983-01-19 1984-08-01 Siemens Aktiengesellschaft Manufacture of conductive plastics
FR2543057A1 (en) * 1983-03-23 1984-09-28 Berstorff Gmbh Masch Hermann METHOD AND DEVICE FOR OBTAINING MAXIMUM FLOW OF A DOUBLE SCREW EXTRUDER
FR2601283A1 (en) * 1986-07-12 1988-01-15 Werner & Pfleiderer METHOD FOR OPERATING A SCREW EXTRUDER AND SCREW EXTRUDER USING THIS METHOD OF VARIABLE ROTATION SPEED.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0114620A2 (en) * 1983-01-19 1984-08-01 Siemens Aktiengesellschaft Manufacture of conductive plastics
EP0114620A3 (en) * 1983-01-19 1987-04-22 Siemens Aktiengesellschaft Manufacture of conductive plastics
FR2543057A1 (en) * 1983-03-23 1984-09-28 Berstorff Gmbh Masch Hermann METHOD AND DEVICE FOR OBTAINING MAXIMUM FLOW OF A DOUBLE SCREW EXTRUDER
FR2601283A1 (en) * 1986-07-12 1988-01-15 Werner & Pfleiderer METHOD FOR OPERATING A SCREW EXTRUDER AND SCREW EXTRUDER USING THIS METHOD OF VARIABLE ROTATION SPEED.

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Legal Events

Date Code Title Description
BV The patent application has lapsed