GB1017398A - Apparatus for adjusting the diameter of tubular films - Google Patents

Apparatus for adjusting the diameter of tubular films

Info

Publication number
GB1017398A
GB1017398A GB34011/62A GB3401162A GB1017398A GB 1017398 A GB1017398 A GB 1017398A GB 34011/62 A GB34011/62 A GB 34011/62A GB 3401162 A GB3401162 A GB 3401162A GB 1017398 A GB1017398 A GB 1017398A
Authority
GB
United Kingdom
Prior art keywords
bubble
tube
arm
skid
interior
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
GB34011/62A
Inventor
Antonio Belloni
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.)
I C P M IDUSTRIE CHIMICHE PORT
Original Assignee
I C P M IDUSTRIE CHIMICHE PORT
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 CH508562A priority Critical patent/CH423211A/en
Priority to FR895597A priority patent/FR1382906A/en
Priority claimed from FR895597A external-priority patent/FR1382906A/en
Application filed by I C P M IDUSTRIE CHIMICHE PORT filed Critical I C P M IDUSTRIE CHIMICHE PORT
Priority to GB34011/62A priority patent/GB1017398A/en
Publication of GB1017398A publication Critical patent/GB1017398A/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
    • B29C48/92—Measuring, controlling or regulating
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92019—Pressure
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92114—Dimensions
    • B29C2948/92123—Diameter or circumference
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92609—Dimensions
    • B29C2948/92619—Diameter or circumference
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92923—Calibration, after-treatment or cooling zone
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

1,017,398. Tubular films. I.C.P.M. INDUSTRIE CHIMICHE PORTO MARGHERA S.p.A. Sept. 5, 1962, No. 34011/62. Heading B5B. A device 8 for adjusting the diameter of tubular films made by inflation comprises an injector 1 supplied with compressed gas via tube 7, a variable pressure chamber 2 communicating with the interior of the bubble 6 by a connecting tube 3-3<SP>1</SP>, and a revolvable pierced mask 4 coaxial with the injector chamber and integral with a skid or shoe 5 resting against the exterior of the bubble 6. Chamber 2 has a hole 102 the aperture of which can be increased or decreased by rotation of mask 4, fitted with a correspondong hole 104, about the surface of the shell 203. Shell 203 is carried by arm 11 which is revolvably supported by support 110, which, through location screws 10, enables the inclination of arm 11 to be adjusted. In operation, the melt enters nozzle 30 via tube 9 and is extruded to form a bubble 6, inflation gas being supplied via tube 7, chamber 2 and tube 3-3<SP>1</SP> to the bubble interior. A proportion of the gas leaks out via holes 102 and 104 which normally partially overlap. Should the bubble diminish in volume the skid 5 falls, partially or wholly closing the leak and thus increasing the pressure of the gas supplied to the interior of the bubble. Should the bubble increase in volume the skid 5 rises, further opening the leak and thus reducing the pressure of the gas supplied to the tube interior. Skid 5 may be arranged to fall under its own weight or by the action of springs. Bubble diameter may be varied by altering the inclination of the supporting arm 11, and the sensitivity of the apparatus, i.e. the promptness with which it intervenes may be adjusted by inclining the shoe arm or by adjusting the pressure exerted by the shoe arm on the tubular film.
GB34011/62A 1961-04-27 1962-09-05 Apparatus for adjusting the diameter of tubular films Expired GB1017398A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CH508562A CH423211A (en) 1961-04-27 1962-04-25 Device for the automatic adjustment of the diameter of tubular plastic films extruded by a blow molding process
FR895597A FR1382906A (en) 1961-04-27 1962-04-25 Apparatus for automatic width adjustment of films of thermoplastic material extruded using a blowing process
GB34011/62A GB1017398A (en) 1962-04-25 1962-09-05 Apparatus for adjusting the diameter of tubular films

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR895597A FR1382906A (en) 1961-04-27 1962-04-25 Apparatus for automatic width adjustment of films of thermoplastic material extruded using a blowing process
GB34011/62A GB1017398A (en) 1962-04-25 1962-09-05 Apparatus for adjusting the diameter of tubular films

Publications (1)

Publication Number Publication Date
GB1017398A true GB1017398A (en) 1966-01-19

Family

ID=26195384

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34011/62A Expired GB1017398A (en) 1961-04-27 1962-09-05 Apparatus for adjusting the diameter of tubular films

Country Status (1)

Country Link
GB (1) GB1017398A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3700370A (en) * 1970-03-02 1972-10-24 Dow Chemical Co Film size control apparatus
US4049768A (en) * 1976-04-09 1977-09-20 Mobil Oil Corporation Method for extending thermoplastic foams having smooth external skins
US4299793A (en) * 1978-12-25 1981-11-10 Chisso Engineering Co., Ltd. Method and apparatus for producing tubular plastic films
CN103006184A (en) * 2013-01-16 2013-04-03 广州大学 Nozzle with orifices switchable at two ends

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3700370A (en) * 1970-03-02 1972-10-24 Dow Chemical Co Film size control apparatus
US4049768A (en) * 1976-04-09 1977-09-20 Mobil Oil Corporation Method for extending thermoplastic foams having smooth external skins
US4299793A (en) * 1978-12-25 1981-11-10 Chisso Engineering Co., Ltd. Method and apparatus for producing tubular plastic films
CN103006184A (en) * 2013-01-16 2013-04-03 广州大学 Nozzle with orifices switchable at two ends

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