GB1389922A - Process control - Google Patents

Process control

Info

Publication number
GB1389922A
GB1389922A GB2852172A GB2852172A GB1389922A GB 1389922 A GB1389922 A GB 1389922A GB 2852172 A GB2852172 A GB 2852172A GB 2852172 A GB2852172 A GB 2852172A GB 1389922 A GB1389922 A GB 1389922A
Authority
GB
United Kingdom
Prior art keywords
size
extruder
variables
dienes
ovens
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.)
Expired
Application number
GB2852172A
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB1389922A publication Critical patent/GB1389922A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D5/00—Control of dimensions of material
    • G05D5/02—Control of dimensions of material of thickness, e.g. of rolled material
    • G05D5/03—Control of dimensions of material of thickness, e.g. of rolled material characterised by the use of electric means
    • 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
    • B29C44/60—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
    • B29C48/92—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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92114—Dimensions
    • 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
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92428—Calibration, after-treatment, or cooling zone
    • 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
    • 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
    • B29C48/05—Filamentary, e.g. strands
    • 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
    • B29C48/06—Rod-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
    • B29C48/07—Flat, e.g. panels
    • 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
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

1389922 Automatic extrusion control E I DU PONT DE NEMOURS & CO 19 June 1972 [23 June 1971] 28521/72 Heading B5A [Also in Division G3] The size of an extrudate is maintained at a required value by changing process variables according to a predetermined mathematical model. As shown, material 52 from extruder 51 is fed on belts 53c, 54c, 56c in vulcanizing, expanding normalizing ovens 53, 54, 56 to roll 58. The size of the material is measured at 59 and, if not within predetermined limits, the variables of the extruder, e.g. pressure or temperature are adjusted automatically according to a mathematical model held in a computer and continuously changed according to the results obtained, the extruder variables preferably being selected in descending order of importance. Similarly, the conditions in the ovens, e.g. temperature or belt speed may be adjusted according to material size as measured at 60, to control the final extrudate size. The extruded material e.g. for use as hose, tubing, coating on wire or tyre thread, may be natural rubber. dienes or copolymers of dienes with styrene, acrylates, acrylonitrile, isobutylene, vinyl homopolymers or copolymers with polyolefins, and may include chemical blowing agents, fillers, softeners, accelerators, antioxidants, reinforcing pigments or vulcanizers.
GB2852172A 1971-06-23 1972-06-19 Process control Expired GB1389922A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15580571A 1971-06-23 1971-06-23

Publications (1)

Publication Number Publication Date
GB1389922A true GB1389922A (en) 1975-04-09

Family

ID=22556867

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2852172A Expired GB1389922A (en) 1971-06-23 1972-06-19 Process control

Country Status (6)

Country Link
AU (1) AU4207572A (en)
CA (1) CA997035A (en)
FR (1) FR2143072B1 (en)
GB (1) GB1389922A (en)
IT (1) IT959909B (en)
SE (1) SE389472B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT383079B (en) * 1984-06-30 1987-05-11 Berstorff Gmbh Masch Hermann EXTRUSION PRESS FOR PRODUCING TREADS FOR CAR TIRES OR THE LIKE. PROFILES OR PATHS
GB2333989A (en) * 1998-02-06 1999-08-11 Athlone Extrusions Dev Ltd Testing extruded plastics
CN103175832A (en) * 2011-12-22 2013-06-26 罗姆及哈斯公司 Method for measuring polymer foam expansion and apparatus for use therein

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4751651A (en) * 1983-08-16 1988-06-14 Phillips Petroleum Company Shaping of dies
DE3423491A1 (en) * 1984-06-05 1985-12-05 Kunststoff-Verarbeitung GmbH Dirk A. Brügmann, 5800 Hagen DEVICE FOR DETERMINING DUST FORMATION ON AN EXTRUSION PRESS
EP0218850A1 (en) * 1985-09-25 1987-04-22 Kunststoff-Verarbeitungs GmbH Dirk A. Brügmann Process for determining a proportional change in a profile
DE3541680A1 (en) * 1985-11-26 1987-05-27 Bernd Becker DEVICE FOR CONTROLLING A PLANT FOR PRODUCING STRING PROFILES

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT383079B (en) * 1984-06-30 1987-05-11 Berstorff Gmbh Masch Hermann EXTRUSION PRESS FOR PRODUCING TREADS FOR CAR TIRES OR THE LIKE. PROFILES OR PATHS
GB2333989A (en) * 1998-02-06 1999-08-11 Athlone Extrusions Dev Ltd Testing extruded plastics
GB2333989B (en) * 1998-02-06 2002-12-31 Athlone Extrusions Dev Ltd Production of plastics sheet material
CN103175832A (en) * 2011-12-22 2013-06-26 罗姆及哈斯公司 Method for measuring polymer foam expansion and apparatus for use therein
WO2013095876A1 (en) * 2011-12-22 2013-06-27 Rohm & Haas Company Method for measuring polymer foam expansion and apparatus for use therein
JP2013136751A (en) * 2011-12-22 2013-07-11 Rohm & Haas Co Method for measuring polymer foam expansion and apparatus for use therein
CN103175832B (en) * 2011-12-22 2017-09-01 罗姆及哈斯公司 Measure the method for foam of polymers volume expansivity and for instrument therein

Also Published As

Publication number Publication date
AU4207572A (en) 1973-11-15
SE389472B (en) 1976-11-08
IT959909B (en) 1973-11-10
FR2143072B1 (en) 1977-12-23
FR2143072A1 (en) 1973-02-02
CA997035A (en) 1976-09-14

Similar Documents

Publication Publication Date Title
GB1428891A (en) Process for the modification of thermoplastic material and apparatus therefor
US2720680A (en) Methods and machines for producing tubing and sheeting
GB1526398A (en) Manufacture of extruded products
US3544667A (en) Process for biaxially stretching thermoplastic tubular film
ES418968A1 (en) Process and apparatus for the extrusion of coated skein-shaped profiles, preferably of thermoplastic synthetic resins
EP0201337A3 (en) Early progressive junction extrusion system
GB1189999A (en) Production of Biaxially Oriented Films
GB1393694A (en) Extruders
GB1389922A (en) Process control
GB1359219A (en) Process and apparatus for the continuous production and/or covering of extruded sections
GB954069A (en) Improvements in methods of and apparatus for, the continuous production of composite plastic material
GB1399744A (en) Method and apparatus for making sheets and tubes for forming into bags
GB1101824A (en) Process for the manufacture of thermoplastic films
DE3560522D1 (en) Apparatus for producing flat profiles from plastic caoutchouc or synthetic material mixtures of various compositions by extrusion moulding
GB987090A (en) Process and apparatus for stretching plastic net
US3471594A (en) Methods of manufacturing polyvinyl alcohol films
US3769397A (en) Method of making a tube of plastic film
GB999548A (en) Process and apparatus in the form of a flat sheeting die for the manufacture of foils with beaded edges from thermoplastic material
GR3018514T3 (en) Process for the continuous manufacture of a randomly patterned, elastomeric floor covering.
GB1493453A (en) Method and apparatus for manufacturing a hollow plastics article
GB1270836A (en) Thermoplastic synthetic resin
GB1457755A (en)
US3592954A (en) Extrusion of tyre lugs containing shredded metal wire
GB1340687A (en) Thermoplastic film with a degree of planarity and process for the production thereof
US3830900A (en) Method of forming foamed plastic sheets

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee