CA2122277A1 - Cross-Head Die with Improved Flow Distribution - Google Patents

Cross-Head Die with Improved Flow Distribution

Info

Publication number
CA2122277A1
CA2122277A1 CA2122277A CA2122277A CA2122277A1 CA 2122277 A1 CA2122277 A1 CA 2122277A1 CA 2122277 A CA2122277 A CA 2122277A CA 2122277 A CA2122277 A CA 2122277A CA 2122277 A1 CA2122277 A1 CA 2122277A1
Authority
CA
Canada
Prior art keywords
tip holder
concentric
annular groove
portions
axial
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
CA2122277A
Other languages
French (fr)
Other versions
CA2122277C (en
Inventor
James A. Milliman
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.)
CAMDEN EXTRUSION TOOL AND DESIGN Inc
Original Assignee
MILLIMAN EVERETT L
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 MILLIMAN EVERETT L filed Critical MILLIMAN EVERETT L
Priority to CA002122277A priority Critical patent/CA2122277C/en
Publication of CA2122277A1 publication Critical patent/CA2122277A1/en
Application granted granted Critical
Publication of CA2122277C publication Critical patent/CA2122277C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • B29C48/03—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
    • 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
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Surface Treatment Of Glass Fibres Or Filaments (AREA)

Abstract

A cross-head die assembly for applying a coating material, such as plastic insulation, to a continuous filament, such as an electrical wire, includes the usual body with axial bore, through which the filament is moved, and radial bore, through which the coating material is introduced. The assembly further includes a die member, a tip holder and a tip, all positioned and releasably held in assembled relation within the body axial bore. The tip holder includes an annular groove communicating with the body radial bore for flow of molten material through the radial bore and about the annular groove. A flow passage, preferably a plurality of axial grooves in the tip holder, provide flow of the molten material from the annular groove to the die member orifice.
Further refinements include making the annular groove concentric about an axis parallel to and spaced from the coaxial, central axes of the body and tip holder axial bores, and forming a plurality of frustoconical portions on the tip holder concentric, a first of such portions being concentric about the longitudinal axis of the tip holder and other portions being concentric about axes at acute angles to the longitudinal axis.
CA002122277A 1994-04-27 1994-04-27 Cross-head die with improved flow distribution Expired - Fee Related CA2122277C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002122277A CA2122277C (en) 1994-04-27 1994-04-27 Cross-head die with improved flow distribution

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA002122277A CA2122277C (en) 1994-04-27 1994-04-27 Cross-head die with improved flow distribution

Publications (2)

Publication Number Publication Date
CA2122277A1 true CA2122277A1 (en) 1995-10-28
CA2122277C CA2122277C (en) 1999-06-22

Family

ID=4153472

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002122277A Expired - Fee Related CA2122277C (en) 1994-04-27 1994-04-27 Cross-head die with improved flow distribution

Country Status (1)

Country Link
CA (1) CA2122277C (en)

Also Published As

Publication number Publication date
CA2122277C (en) 1999-06-22

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed