FR2257411A1 - Extrusion die for making thin wall film or tubing - by subdivision and overlay of the melt flow - Google Patents

Extrusion die for making thin wall film or tubing - by subdivision and overlay of the melt flow

Info

Publication number
FR2257411A1
FR2257411A1 FR7336287A FR7336287A FR2257411A1 FR 2257411 A1 FR2257411 A1 FR 2257411A1 FR 7336287 A FR7336287 A FR 7336287A FR 7336287 A FR7336287 A FR 7336287A FR 2257411 A1 FR2257411 A1 FR 2257411A1
Authority
FR
France
Prior art keywords
mandrel
thin wall
extrusion die
tubing
subdivision
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
FR7336287A
Other languages
French (fr)
Other versions
FR2257411B1 (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.)
SCOMAC ETUDE CONST MACHINES
Original Assignee
SCOMAC ETUDE CONST MACHINES
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 SCOMAC ETUDE CONST MACHINES filed Critical SCOMAC ETUDE CONST MACHINES
Priority to FR7336287A priority Critical patent/FR2257411A1/en
Publication of FR2257411A1 publication Critical patent/FR2257411A1/en
Application granted granted Critical
Publication of FR2257411B1 publication Critical patent/FR2257411B1/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
    • B29C48/362—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using static mixing devices
    • 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
    • B29C48/03—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

Landscapes

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

Abstract

Extrusion die in which an axial flow diverges over a conical spreader before passing through an annular array of holes in a baffle plate. The strands emerging from the baffle plate enter a gap between a cylindrical barrel and a mandrel having a series of helical grooves, developed for less than one turn along the upstream part of the mandrel. The downstream part of the mandrel has a smooth surface. The die is for extrusion of thin wall thermoplastic tubing or film. Its use generates a circumferentially homogenised extrudate with thinner walls and/or better strength than similar film produced over a plain mandrel. The wall section comprises a laminate of layers derived from at least two of the initial stranded flows through the holes.
FR7336287A 1973-10-05 1973-10-05 Extrusion die for making thin wall film or tubing - by subdivision and overlay of the melt flow Granted FR2257411A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7336287A FR2257411A1 (en) 1973-10-05 1973-10-05 Extrusion die for making thin wall film or tubing - by subdivision and overlay of the melt flow

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7336287A FR2257411A1 (en) 1973-10-05 1973-10-05 Extrusion die for making thin wall film or tubing - by subdivision and overlay of the melt flow

Publications (2)

Publication Number Publication Date
FR2257411A1 true FR2257411A1 (en) 1975-08-08
FR2257411B1 FR2257411B1 (en) 1976-05-14

Family

ID=9126227

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7336287A Granted FR2257411A1 (en) 1973-10-05 1973-10-05 Extrusion die for making thin wall film or tubing - by subdivision and overlay of the melt flow

Country Status (1)

Country Link
FR (1) FR2257411A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0419592A1 (en) * 1989-01-23 1991-04-03 Amoco Corporation An extrusion die apparatus and process for producing tubular film from thermoplastic molten material
EP3100843A1 (en) 2015-06-01 2016-12-07 Promix Solutions AG Method and device for the manufacture of annular extrudates

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0419592A1 (en) * 1989-01-23 1991-04-03 Amoco Corporation An extrusion die apparatus and process for producing tubular film from thermoplastic molten material
EP0419592A4 (en) * 1989-01-23 1991-06-19 Amoco Corporation An extrusion die apparatus and process for producing tubular film from thermoplastic molten material
EP3100843A1 (en) 2015-06-01 2016-12-07 Promix Solutions AG Method and device for the manufacture of annular extrudates

Also Published As

Publication number Publication date
FR2257411B1 (en) 1976-05-14

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Legal Events

Date Code Title Description
ST Notification of lapse