FR2196893A2 - Tubular film extrusion head - with representative multiple subdivision of feedstock flow towards the die - Google Patents

Tubular film extrusion head - with representative multiple subdivision of feedstock flow towards the die

Info

Publication number
FR2196893A2
FR2196893A2 FR7330678A FR7330678A FR2196893A2 FR 2196893 A2 FR2196893 A2 FR 2196893A2 FR 7330678 A FR7330678 A FR 7330678A FR 7330678 A FR7330678 A FR 7330678A FR 2196893 A2 FR2196893 A2 FR 2196893A2
Authority
FR
France
Prior art keywords
flow
die
tubular film
film extrusion
layers
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
FR7330678A
Other languages
French (fr)
Other versions
FR2196893B2 (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.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher KG
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 Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Publication of FR2196893A2 publication Critical patent/FR2196893A2/en
Application granted granted Critical
Publication of FR2196893B2 publication Critical patent/FR2196893B2/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
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/34—Cross-head annular extrusion nozzles, i.e. for simultaneously receiving moulding material and the preform to be coated
    • 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
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • 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
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • 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
    • B29C48/695—Flow dividers, e.g. breaker plates

Landscapes

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

Abstract

Parent patent described a tubular film extrusion die where the feed melt is introduced perpendicular to the die axis and divided to obtain twin flow streams which impinged tangentially into the annular die. Thus addn. provides for subdivision of each of the two primary flow streams into >=1 further generations of twin flows, thus increasing the number of start points at which the total flow is introduced tangentially to the annular die. The flow path lengths are balanced with all feeding in the same direction w.r.t. the die axis. Pref. the lows ar esplit by assemblies of stacked plates with intervening spacers which direct alternating layers of the full flow section to the downstream passages. The outermost flow layers are pref. divided equally so that each sub flow has a representative sample of the original flow layers.
FR7330678A 1972-08-25 1973-08-24 Tubular film extrusion head - with representative multiple subdivision of feedstock flow towards the die Granted FR2196893A2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2241900 1972-08-25

Publications (2)

Publication Number Publication Date
FR2196893A2 true FR2196893A2 (en) 1974-03-22
FR2196893B2 FR2196893B2 (en) 1976-09-17

Family

ID=5854548

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7330678A Granted FR2196893A2 (en) 1972-08-25 1973-08-24 Tubular film extrusion head - with representative multiple subdivision of feedstock flow towards the die

Country Status (3)

Country Link
BR (1) BR7306503D0 (en)
FR (1) FR2196893A2 (en)
IT (1) IT1045860B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3338996A1 (en) * 2016-12-20 2018-06-27 The Goodyear Tire & Rubber Company Apparatus for producing laminated fabric ply strips

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEANT *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3338996A1 (en) * 2016-12-20 2018-06-27 The Goodyear Tire & Rubber Company Apparatus for producing laminated fabric ply strips

Also Published As

Publication number Publication date
FR2196893B2 (en) 1976-09-17
BR7306503D0 (en) 1974-08-15
IT1045860B (en) 1980-06-10

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