ES458832A1 - Roll nip die for extruding hot plastics sheet - to produce e.g. PVC webs at relatively low shear rates and temperatures - Google Patents

Roll nip die for extruding hot plastics sheet - to produce e.g. PVC webs at relatively low shear rates and temperatures

Info

Publication number
ES458832A1
ES458832A1 ES458832A ES458832A ES458832A1 ES 458832 A1 ES458832 A1 ES 458832A1 ES 458832 A ES458832 A ES 458832A ES 458832 A ES458832 A ES 458832A ES 458832 A1 ES458832 A1 ES 458832A1
Authority
ES
Spain
Prior art keywords
chamber
relatively low
low shear
shear rates
temperatures
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
ES458832A
Other languages
Spanish (es)
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.)
Solvay SA
Original Assignee
Solvay SA
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 Solvay SA filed Critical Solvay SA
Publication of ES458832A1 publication Critical patent/ES458832A1/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
    • 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
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/35—Extrusion nozzles or dies with rollers
    • 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
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • 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
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

A die device for extrusion of hot plastic sheet comprises a cylindrical chamber incorporating a coaxial rotor for distributing through the chamber melt received at one or more inputs from an extruder or equivalent source. The melt is discharged from the chambe between two contrarotating rolls aligned parallel and tangential to the chamber. Used esp. for generating sheet stock for feeding a calendar roll nipt with e.g. PVC based compositions. The material can be moved and discharged at relatively low shear rates and temps. and can be optimum coniditons for entering a calendar. Independent control of the temps. and speeds of the extruder screw, the chamber rotor and the die lip rolls allows each to be optimised for its purpose, resulting in greater throughputs, flexibility and efficiency than conventional screw extruders where the screw design is a compromise between plasticization pumping and throughput requirements.
ES458832A 1976-05-17 1977-05-16 Roll nip die for extruding hot plastics sheet - to produce e.g. PVC webs at relatively low shear rates and temperatures Expired ES458832A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7615023A FR2351770A1 (en) 1976-05-17 1976-05-17 Roll nip die for extruding hot plastics sheet - to produce e.g. PVC webs at relatively low shear rates and temperatures

Publications (1)

Publication Number Publication Date
ES458832A1 true ES458832A1 (en) 1978-03-01

Family

ID=9173315

Family Applications (1)

Application Number Title Priority Date Filing Date
ES458832A Expired ES458832A1 (en) 1976-05-17 1977-05-16 Roll nip die for extruding hot plastics sheet - to produce e.g. PVC webs at relatively low shear rates and temperatures

Country Status (7)

Country Link
BE (1) BE854540A (en)
BR (1) BR7702751A (en)
DE (1) DE2721223A1 (en)
ES (1) ES458832A1 (en)
FR (1) FR2351770A1 (en)
IT (1) IT1081742B (en)
NL (1) NL7705449A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IN150686B (en) * 1978-03-09 1982-11-20 Usm Corp
FR2673141B1 (en) * 1991-02-21 1994-09-02 Aerospatiale ADJUSTABLE DIE WITH ROTATING ROLLERS FOR THE PRODUCTION OF A BELT WITH INCLINED EDGES.

Also Published As

Publication number Publication date
DE2721223A1 (en) 1977-12-01
FR2351770A1 (en) 1977-12-16
IT1081742B (en) 1985-05-21
BR7702751A (en) 1978-03-21
NL7705449A (en) 1977-11-21
FR2351770B1 (en) 1979-10-12
BE854540A (en) 1977-11-14

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19971103