GB1212182A - Pressure balanced annular extrusion die - Google Patents

Pressure balanced annular extrusion die

Info

Publication number
GB1212182A
GB1212182A GB49850/66A GB4985066A GB1212182A GB 1212182 A GB1212182 A GB 1212182A GB 49850/66 A GB49850/66 A GB 49850/66A GB 4985066 A GB4985066 A GB 4985066A GB 1212182 A GB1212182 A GB 1212182A
Authority
GB
United Kingdom
Prior art keywords
die
orifice
lip
die member
framework
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
GB49850/66A
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.)
DuPont Canada Inc
Original Assignee
DuPont Canada Inc
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 DuPont Canada Inc filed Critical DuPont Canada Inc
Priority to GB49850/66A priority Critical patent/GB1212182A/en
Priority to DE19671729316 priority patent/DE1729316A1/en
Priority to LU54797D priority patent/LU54797A1/xx
Priority to FR127046A priority patent/FR1542310A/en
Priority to ES347220A priority patent/ES347220A1/en
Priority to BE706187D priority patent/BE706187A/xx
Priority to NL6715130A priority patent/NL6715130A/xx
Publication of GB1212182A publication Critical patent/GB1212182A/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
    • B29C48/345—Extrusion nozzles comprising two or more adjacently arranged ports, for simultaneously extruding multiple strands, e.g. for pelletising
    • 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
    • B29C48/09—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
    • B29C48/03—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
    • B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
    • 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
    • B29C48/33—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles with parts rotatable relative to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2028/00—Nets or the like

Landscapes

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

Abstract

1,212,182. Film and net extrusion die. DU PONT OF CANADA Ltd. 7 Nov., 1967 [7 Nov., 1966], No. 49850/66. Headings B5A and B5B. A circular rotating die for extruding thermoplastic films or nets comprises an inner die member 35 and 54 with a lip 41 and an outer die member 43 with a lip 42, the lips defining the extrusion orifice 40, a reservoir 39 adjacent the orifice and a passage 53 through the inner die for conveying the thermoplastic material from the crosshead 52 to the orifice 40. As shown, the inner die member comprises an upper section 35 and a lower section 54 bolted to the upper leaving a gap 38. This section is rotated on bearings 37 in the mould framework 36 by sprocket 50 and is connected to the crosshead 52 by packing gland 34. The outer die member is rotated by sprocket 49 on bearings 44 attached to the mould framework 47 and is held in position by the overlap of member 48 and framework 47. Immediately upstream of the orifice 40, the space between the die increases to form a reservoir 39, which, in combination with the horizontal passage 38 balances nearly all the internal pressure in the die. When used for the production of netting each lip may contain a series of complementary orifices or a set of holes spaced annularly about the axis of rotation. The thermoplastic materials may be polyamides, polyesters, P.V.C. and copolymers with vinylacetate or vinylidene chloride, polyethylene and copolymers, cellulose acetate, natural or synthetic rubbers and foamable plastic material such as polystyrene and polyethylene.
GB49850/66A 1966-11-07 1966-11-07 Pressure balanced annular extrusion die Expired GB1212182A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB49850/66A GB1212182A (en) 1966-11-07 1966-11-07 Pressure balanced annular extrusion die
DE19671729316 DE1729316A1 (en) 1966-11-07 1967-11-04 Ring-shaped press die and process for pressing out thermoplastic materials
LU54797D LU54797A1 (en) 1966-11-07 1967-11-06
FR127046A FR1542310A (en) 1966-11-07 1967-11-06 Pressure balanced annular extrusion die
ES347220A ES347220A1 (en) 1966-11-07 1967-11-07 Pressure balanced annular extrusion die
BE706187D BE706187A (en) 1966-11-07 1967-11-07
NL6715130A NL6715130A (en) 1966-11-07 1967-11-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB49850/66A GB1212182A (en) 1966-11-07 1966-11-07 Pressure balanced annular extrusion die

Publications (1)

Publication Number Publication Date
GB1212182A true GB1212182A (en) 1970-11-11

Family

ID=10453772

Family Applications (1)

Application Number Title Priority Date Filing Date
GB49850/66A Expired GB1212182A (en) 1966-11-07 1966-11-07 Pressure balanced annular extrusion die

Country Status (6)

Country Link
BE (1) BE706187A (en)
DE (1) DE1729316A1 (en)
ES (1) ES347220A1 (en)
GB (1) GB1212182A (en)
LU (1) LU54797A1 (en)
NL (1) NL6715130A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE430670B (en) * 1982-06-04 1983-12-05 Marie Iacconi PROCEDURE FOR MANUFACTURING PLASTIC PRODUCTS AND NOZZLES FOR EXTRUDES FOR MANUFACTURE OF HOSE-SHAPED PRODUCT

Also Published As

Publication number Publication date
BE706187A (en) 1968-03-18
DE1729316A1 (en) 1971-03-04
LU54797A1 (en) 1968-01-31
ES347220A1 (en) 1969-05-16
NL6715130A (en) 1968-05-08

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees