GB908415A - Improvements in or relating to extrusion nozzles - Google Patents

Improvements in or relating to extrusion nozzles

Info

Publication number
GB908415A
GB908415A GB31361/60A GB3136160A GB908415A GB 908415 A GB908415 A GB 908415A GB 31361/60 A GB31361/60 A GB 31361/60A GB 3136160 A GB3136160 A GB 3136160A GB 908415 A GB908415 A GB 908415A
Authority
GB
United Kingdom
Prior art keywords
nozzle
curvature
lips
curved
outlet aperture
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
GB31361/60A
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.)
Reifenhaeuser GmbH and Co KG Maschinenenfabrik
Original Assignee
Reifenhaeuser GmbH and Co KG Maschinenenfabrik
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 Reifenhaeuser GmbH and Co KG Maschinenenfabrik filed Critical Reifenhaeuser GmbH and Co KG Maschinenenfabrik
Publication of GB908415A publication Critical patent/GB908415A/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
    • B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Nozzles (AREA)
  • Manufacturing And Processing Devices For Dough (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

<PICT:0908415/IV(a)/1> An elongated slot extrusion nozzle for laminar products includes at its output end a discharge passage defined by limiting walls curved in the form of circular arcs arranged in such a manner as to cause material being extruded to be deflected, after introduction into the discharge passage, out through an outlet aperture therein in a direction substantially normal to that followed by the material upon its introduction into the passage, p the dispositions of the centres of curvature of the limiting walls and the arrangement of the outlet aperture being such, that on the exertion by the material being extruded of a pressure on one of the limiting walls sufficient to cause yielding thereof relative to the other limiting wall, no appreciable increase of the width of the outlet aperture takes place. The nozzle channel may be so curved that the flow of substance is deflected through approximately 90 degrees. As shown, nozzle lips 12 and 14 are carried by upper and lower nozzle parts 1 and 2, 12 being supported on batten 13 and 14 on head batten 15. Material is supplied from screw press 5 via the insert 6 of oval cross-section, to extrusion channel 7, from which it passes through distribution chamber 8 and constriction 9 controlled by gate 11 to the outlet gap 10. The lower part 2 is reduced in cross-section along line GH by the depression 16 on the lower side and chamber 8 on the upper side. The distance of the plane of reduced cross-section from the curved pair of lips corresponds roughly to the radius of curvature R of the lower lip, so that the centre of curvature of the lips lies on the line GH at the point J which is in the bending stress neutral zone.
GB31361/60A 1959-09-11 1960-09-12 Improvements in or relating to extrusion nozzles Expired GB908415A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER26356A DE1180510B (en) 1959-09-11 1959-09-11 Wide slot nozzle

Publications (1)

Publication Number Publication Date
GB908415A true GB908415A (en) 1962-10-17

Family

ID=7402162

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31361/60A Expired GB908415A (en) 1959-09-11 1960-09-12 Improvements in or relating to extrusion nozzles

Country Status (2)

Country Link
DE (1) DE1180510B (en)
GB (1) GB908415A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6517130B1 (en) * 2000-03-14 2003-02-11 Applied Materials, Inc. Self positioning vacuum chuck

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2061042A (en) * 1934-10-16 1936-11-17 Fiberloid Corp Machine for extruding plastic materials
DE834139C (en) * 1950-04-18 1952-03-17 Phrix Werke Ag Slot nozzle for pouring foils

Also Published As

Publication number Publication date
DE1180510B (en) 1964-10-29

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