GB872115A - Improvements in or relating to the production of flattened tubular film of organic thermoplastic material - Google Patents

Improvements in or relating to the production of flattened tubular film of organic thermoplastic material

Info

Publication number
GB872115A
GB872115A GB7026/59A GB702659A GB872115A GB 872115 A GB872115 A GB 872115A GB 7026/59 A GB7026/59 A GB 7026/59A GB 702659 A GB702659 A GB 702659A GB 872115 A GB872115 A GB 872115A
Authority
GB
United Kingdom
Prior art keywords
tube
rolls
curtain
cooling liquid
extrusion
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
GB7026/59A
Inventor
Brian Stanley Glyde
Kenneth Joseph Whitbourn
Wojciech Jan Fudakowski
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.)
Crown Packaging UK Ltd
Original Assignee
Metal Box 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
Priority to NL248692D priority Critical patent/NL248692A/xx
Priority to LU38313D priority patent/LU38313A1/xx
Application filed by Metal Box PLC filed Critical Metal Box PLC
Priority to GB7026/59A priority patent/GB872115A/en
Priority to FR817035A priority patent/FR1248740A/en
Priority to DE19601504521 priority patent/DE1504521A1/en
Publication of GB872115A publication Critical patent/GB872115A/en
Priority to US395653A priority patent/US3207823A/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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
    • 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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9115—Cooling of hollow articles
    • B29C48/912—Cooling of hollow articles of tubular films
    • B29C48/913—Cooling of hollow articles of tubular films externally
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0019—Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
    • B29C48/903—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies externally

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

<PICT:0872115/IV (a)/1> <PICT:0872115/IV (a)/2> <PICT:0872115/IV (a)/3> An apparatus for producing flattened tubular film of organic thermoplastic material comprises an extruder 1 (Fig. 1), an extrusion nozzle 2 arranged to effect the continuous downward extrusion of a tube of the molten material, and a tube 3 for the inflation of the tube with air so as to maintain therein a volume of air such that the degree of inflation of the tube, in combination with the rate of withdrawal of the tube, reduces the thickness of the tube to a predetermined value and converts it into a tubular film 4 of predetermined diameter and gauge. The tube is continuously withdrawn downwardly by a pair of pinch rolls 5, 6 which also flatten the tube, which is wound on to a reel 7. En route to the rolls, the tube is cooled and set by directing on to the unenclosed tube in the vicinity of its initial inflation a continuous curtain 8 of a cooling liquid such as water. The curtain impinges on the tube and runs down over it towards the rolls 5, 6 to be collected in a container 9 beneath the rolls. The cooling device may comprise a hollow annular member provided around its inner face 10 (Figs. 1 and 2) with a slit-like jet orifice 11 communicating with a chamber 12 to which the cooling liquid is delivered under pressure. The orifice 11 may be directed downwards towards the direction of movement of the tube, as shown in Fig. 3. The annular member may be located at a level somewhat above that of the face of the extrusion die so that the annular area of impingement of the curtain of cooling liquid is located close to the point of extrusion. The inflated tube may be pre-cooled by a stream of air from an annular jet surrounding the tube before the tube passes through the curtain of cooling liquid. The apparatus enables the distance between the die and the nip rolls to be reduced and facilitates the production of films, particularly of polyethylene, of superior gloss and clarity.
GB7026/59A 1959-02-27 1959-02-27 Improvements in or relating to the production of flattened tubular film of organic thermoplastic material Expired GB872115A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL248692D NL248692A (en) 1959-02-27
LU38313D LU38313A1 (en) 1959-02-27
GB7026/59A GB872115A (en) 1959-02-27 1959-02-27 Improvements in or relating to the production of flattened tubular film of organic thermoplastic material
FR817035A FR1248740A (en) 1959-02-27 1960-01-29 Flattened Tubular Plastic Wrap Manufacturing Improvements
DE19601504521 DE1504521A1 (en) 1959-02-27 1960-02-26 Method and device for the production of a laid-flat plastic film tube
US395653A US3207823A (en) 1959-02-27 1964-09-11 Production of flattened tubular plastic film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7026/59A GB872115A (en) 1959-02-27 1959-02-27 Improvements in or relating to the production of flattened tubular film of organic thermoplastic material

Publications (1)

Publication Number Publication Date
GB872115A true GB872115A (en) 1961-07-05

Family

ID=9825231

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7026/59A Expired GB872115A (en) 1959-02-27 1959-02-27 Improvements in or relating to the production of flattened tubular film of organic thermoplastic material

Country Status (5)

Country Link
DE (1) DE1504521A1 (en)
FR (1) FR1248740A (en)
GB (1) GB872115A (en)
LU (1) LU38313A1 (en)
NL (1) NL248692A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK144183A (en) * 1982-04-02 1983-10-03 Fbk International Corp PROCEDURE AND APPARATUS FOR COOLING AND DISPOSAL OF AN EXTRADED WRAPPING OF PLASTIC MATERIAL

Also Published As

Publication number Publication date
LU38313A1 (en) 1900-01-01
NL248692A (en) 1900-01-01
FR1248740A (en) 1960-12-23
DE1504521A1 (en) 1969-07-03

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