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GB665645A - Improvements in or relating to extrusion apparatus for covering cores or forming tubes - Google Patents

Improvements in or relating to extrusion apparatus for covering cores or forming tubes

Info

Publication number
GB665645A
GB665645A GB7971/49A GB797149A GB665645A GB 665645 A GB665645 A GB 665645A GB 7971/49 A GB7971/49 A GB 7971/49A GB 797149 A GB797149 A GB 797149A GB 665645 A GB665645 A GB 665645A
Authority
GB
United Kingdom
Prior art keywords
bore
tube
web
core tube
length
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
GB7971/49A
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.)
IVAN KENNETH FISHER
Balfour Beatty PLC
Original Assignee
IVAN KENNETH FISHER
BICC PLC
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 IVAN KENNETH FISHER, BICC PLC filed Critical IVAN KENNETH FISHER
Priority to GB7971/49A priority Critical patent/GB665645A/en
Publication of GB665645A publication Critical patent/GB665645A/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
    • B29C48/32—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
    • 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

Landscapes

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

Abstract

665,645. Extrusion apparatus for covering cores or forming tubes. BRITISH INSULATED CALLENDER'S CABLES, Ltd., TUNNICLIFF, E.. RICHARDSON, A. B. F. G., and FISHER, I. K. March 22, 1950 [March 23, 1949], No. 7971/49. Class 87(ii) Relates to extrusion heads 1 of the socalled "self-centring" type, which are secured to the extrusion cylinder 7 with the axis of the head lying transverse to the axis of the barrel, the head having a through bore 2 and a lateral opening 6 communicating with the cylinder; in the bore 2 fits a core tube 14 which has a central web 21 that forms two passages 19 through which material passes to the matrix 11. According to the invention the web 21 extends forwardly beyond the front edge A of the opening 6, the length of the extension being about one half or more of the length A-B which is the diameter of the opening 6 in the direction of the through bore 2. The length of the web extension may be 1¢ or twice that of A-B: as shown it extends from A to the front edge C of the core tube. Fig. 4 is an elevation of the core tube (with a core-supporting detachable nose-piece 23), and Fig. 5 a plan thereof. The web extension is broadened at 25a where it bears against the bore 2, and a similar bearing 25b is provided on the lower surface of the core tube. A pin 26 retains the nose-piece 23 in position in tube 14. Tube 14 is located angularly in position by a key 18 in a keyway in bore 2. The head is secured to the cylinder by a screw clamp 9, 10 described in Specification 660,249.
GB7971/49A 1949-03-23 1949-03-23 Improvements in or relating to extrusion apparatus for covering cores or forming tubes Expired GB665645A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7971/49A GB665645A (en) 1949-03-23 1949-03-23 Improvements in or relating to extrusion apparatus for covering cores or forming tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7971/49A GB665645A (en) 1949-03-23 1949-03-23 Improvements in or relating to extrusion apparatus for covering cores or forming tubes

Publications (1)

Publication Number Publication Date
GB665645A true GB665645A (en) 1952-01-30

Family

ID=9843291

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7971/49A Expired GB665645A (en) 1949-03-23 1949-03-23 Improvements in or relating to extrusion apparatus for covering cores or forming tubes

Country Status (1)

Country Link
GB (1) GB665645A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1226291B (en) * 1955-04-01 1966-10-06 Abraham Shanok Process for wrapping a flexible strip with plastic and a cross-head to carry out this process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1226291B (en) * 1955-04-01 1966-10-06 Abraham Shanok Process for wrapping a flexible strip with plastic and a cross-head to carry out this process

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