WO2012102684A1 - Dispositif et procédé de commande de la température d'un film soufflé en plastique extrudé - Google Patents

Dispositif et procédé de commande de la température d'un film soufflé en plastique extrudé Download PDF

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Publication number
WO2012102684A1
WO2012102684A1 PCT/TH2012/000003 TH2012000003W WO2012102684A1 WO 2012102684 A1 WO2012102684 A1 WO 2012102684A1 TH 2012000003 W TH2012000003 W TH 2012000003W WO 2012102684 A1 WO2012102684 A1 WO 2012102684A1
Authority
WO
WIPO (PCT)
Prior art keywords
bubble
air
cover
plastic
blown film
Prior art date
Application number
PCT/TH2012/000003
Other languages
English (en)
Inventor
Saton SAMERPHARK
Chaiyawat NIRUNDORN
Victor Matias
Original Assignee
Itw Minigrip (Thailand) Co., Ltd.
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 claimed from TH1101000134A external-priority patent/TH126263B/th
Application filed by Itw Minigrip (Thailand) Co., Ltd. filed Critical Itw Minigrip (Thailand) Co., Ltd.
Priority to CN201280006227.6A priority Critical patent/CN103391838B/zh
Publication of WO2012102684A1 publication Critical patent/WO2012102684A1/fr

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
    • B29C48/911—Cooling
    • B29C48/9115—Cooling of hollow articles
    • B29C48/912—Cooling of hollow articles of tubular films
    • B29C48/9125—Cooling of hollow articles of tubular films internally
    • 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
    • B29C48/92—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
    • B29C2948/92209—Temperature
    • 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
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92428—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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • 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
    • B29C48/25—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
    • B29C48/902—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 internally
    • 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

Definitions

  • This invention relates to a plastic extruder blown film apparatus and process with controlled external air temperature of bubble.
  • a typical bag manufacturing process comprises the following processes - material preparation, blowing process, side-folding process for carrying bag, water cooling, printing, cutting and sealing, and packing.
  • a typical blowing process uses an extruder melting plastic material to molten phase with high pressure, and directs to die forming tubular bubble. As the bubble emerging from the die, it remains in the molten phase and then cools while moving.
  • the bubble cooling causes air from the air ring around the bubble and also heat release of the bubble to the atmosphere while moving.
  • the air temperature around the bubble or the air from the air ring is not steady, depending on the climatic conditions in the area of operation.
  • the cooling rate of the bubble is a crucial factor in bubble quality control, a diameter of bubble, the plastic strength, and other properties.
  • the cooling rate of the bubble depends on the air temperature around bubble and amount of air from the air ring.
  • the bag manufacturing process generally requires parameter's adjustment in the production process in order to steady dimension and quality of the plastic bag in relation to changes in temperature.
  • the frost line The position of converting the molten bubble to the solid is known as "the frost line".
  • the frost line is not steady, i.e. fluctuating along the bubble, depending on the climatic conditions in the area of operation. It affects a diameter of the bubble, plastic strength, and other properties.
  • This invention relates to a plastic extruder blown film apparatus with controlled external air temperature of bubble characterized in that the cover has feature and position to steady air temperature around the bubble as emerging from the die to the frost line.
  • the blower draws air in the cover and distributes to the upper and lower air rings through the passages and the air supply, so as the frost line of the bubble between the air rings becomes stable providing the bubble with steady dimension.
  • This invention also relates to a plastic extruder blown film process with controlled external air temperature of bubble characterized in that the bubble cooling between the lower air ring and the frost line, then flows to the upper air ring occurs in the cover. This is for steady air temperature around the bubble as bubble as emerging from the die to the frost line. Consequently, the frost line between the upper and lower air rings becomes stable providing the bubble with steady dimension.
  • the objective of this invention is to provide a plastic extruder blown film apparatus and process with controlled external air temperature of bubble. This can steady air temperature around the bubble regardless of the outside temperature of the cover or amount of heat releasing from the bubble at any time. This results in steady frost line position between the upper and - lower air rings, and steady bubble dimension. Consequently, the plastic emerging from the cover flows continuously toward the bag manufacturing process giving plastic bags with consistent quality and higher production rates.
  • Figure 1 shows a schematic view of the plastic extruder blown film apparatus with controlled external air temperature of bubble according to this invention.
  • Figure 2 shows a graph of the temperature around the bubble between the one with controlled external air temperature of bubble according to this invention and the one without controlled external air temperature of bubble.
  • Figure 1 presents a plastic extruder blown film apparatus comprising
  • extruder 2 connected to the hopper 1 melting plastic material to molten phase with high pressure die 3 connected to the extruder 2 taking the molten plastic from the extruder 2 and forming tubular bubble 7, with the bubble 7 size adjusted by an air supply 25 through air passage 23 and air valve 24 to the die 3
  • collapsing shields 26, 27 forcing the bubble 7 toward each other before directing to nip rolls 6
  • the nip rolls 6 flattening the bubble 7 and forwarding to bag manufacturing process cool air supply 18 connected to a cool air valve 19 via passage 22 carrying cool air to the cool air valve 19
  • the cool air valve 19 connected to a thermostat 20 adjusting an amount of air the thermostat 20 connected to the cool air valve 19 measuring temperature around the bubble 7 and controlling the cool air valve 19 to retain air temperature around the bubble 7 to a determined temperature
  • blower 12 supplying air to the lower and upper air rings 4, 5 through passages 16, 17 and air supply 13, 14
  • the cover 9 covers the bubble 7 since emerging from the die 3 till the upper air ring 5.
  • the cover 9 covers the bubble 7 since emerging from the die 3 till the nip rolls 6.
  • the cover 9 comprises air supply board 11 having air outlet 15 connected to the blower 12, cool air supply 21 for carrying cool air from the cool air supply 18 into the cover 9 via the passage 22 and the cool air valve 19, and the air supply 13, 14 for carrying air from the blower 12 into the upper and lower air ring 4, 5 via the passage 16, 17.
  • an upper part of the cover 9 comprises ventilation 10 to vent air from inside the cover 9 to outside.
  • a thermostat 20 is applied to set a temperature in the cover 9 in a range of 20-40°C.
  • the invention also relates to a process for plastic extruder blown film comprising
  • the cooling the bubble 7 by the lower air ring 4, converting the molten plastic to solid at the frost line 8, and rising towards the upper air ring 5 step performs in the cover 9 to steady the air temperature around the bubble 7 as the molten plastic emerging from the die 3 till the frost line 8, so as the frost line 8 of the bubble 7 between the lower and upper air rings 4, 5 becomes stable providing the bubble with steady dimension.
  • the thermostat is used to steady the air temperature around the bubble 7 in a range of 20-40°C.
  • Figure 2 shows a graph of the temperature around the bubble between the one with controlled external air temperature of bubble according to this invention (represented by solid line) and the one without controlled external air temperature of bubble (represented by dashed line).
  • the graph illustrates relatively fluctuated change of temperature with time, i.e. wave shape, in a range between 30 to 36°C.
  • the graph shows relatively steady curve, i.e. straight line, in a range between 32 to 33°C. This indicates significantly small temperature variation providing a steady frost line position between the upper and lower air rings, and steady bubble dimension. Consequently, the plastic from the one with controlled external air temperature of bubble flows continuously toward the bag manufacturing process giving plastic bags with consistent quality and higher production rates.
  • the plastic extruder blown film apparatus and process according to this invention can steady air temperature around the bubble 7 regardless of the outside temperature of the cover 9 or amount of heat releasing from the bubble 7 at any time. This results in steady frost line position between the upper and lower air rings 4, 5 and steady bubble 7 dimension. Consequently, the plastic emerging from the cover 9 flows continuously toward the bag manufacturing process giving plastic bags with consistent quality and higher production rates.
  • the cover according of the invention can be applied to whole bag manufacturing process e.g. having the cover from the blowing process to cutting process.

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)

Abstract

L'invention concerne un dispositif et un procédé de commande de la température d'un film soufflé extrudé. Le dispositif comporte un élément de recouvrement amélioré (9) conçu et disposé de manière à maintenir constante la température de l'air autour des bulles (7) quittant le moule (3) au niveau du point de givrage (8). La souffleuse (12) aspire de l'air dans l'élément de recouvrement (9) et le répartit sur les anneaux de soufflage supérieurs et inférieurs (4, 5) à travers les passages (13, 14) de telle manière que le point de givrage (8) des bulles (7) entre les anneaux de soufflage (4, 5) devient stable de manière à conférer des dimensions constantes aux bulles (7). Par conséquent, le plastique quittant l'élément de recouvrement (9) s'écoule en continu vers le processus de fabrication de sac de manière à produire des sacs en plastique de qualité constante, avec des vitesses de production supérieures.
PCT/TH2012/000003 2011-01-28 2012-01-27 Dispositif et procédé de commande de la température d'un film soufflé en plastique extrudé WO2012102684A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201280006227.6A CN103391838B (zh) 2011-01-28 2012-01-27 用于控制挤出塑料吹塑薄膜的温度的设备以及方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TH1101000134 2011-01-28
TH1101000134A TH126263B (th) 2011-01-28 เครื่องและกระบวนการเป่าถุงพลาสติกที่มีการรักษาอุณหภูมิภายนอกลูกโป่ง

Publications (1)

Publication Number Publication Date
WO2012102684A1 true WO2012102684A1 (fr) 2012-08-02

Family

ID=45852663

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TH2012/000003 WO2012102684A1 (fr) 2011-01-28 2012-01-27 Dispositif et procédé de commande de la température d'un film soufflé en plastique extrudé

Country Status (2)

Country Link
CN (1) CN103391838B (fr)
WO (1) WO2012102684A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103434130A (zh) * 2013-09-04 2013-12-11 南京沪江复合材料有限公司 一种吹膜机膜泡隔热保护罩

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104044264A (zh) * 2014-05-27 2014-09-17 洛阳一海包装材料有限公司 一种多层共挤膜生产装置
CN105415551A (zh) * 2015-12-10 2016-03-23 华南理工大学 基于烟囱效应的吹塑薄膜内外气流协同冷却方法及装置
WO2017194520A1 (fr) * 2016-05-09 2017-11-16 Windmöller & Hölscher Kg Dispositif de fabrication d'une feuille soufflée

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB887966A (en) * 1959-09-14 1962-01-24 Union Carbide Corp Method of apparatus for producing tubular films of thermoplastic polymeric material
DE2006798A1 (en) * 1970-02-14 1971-08-26 Reifenhaeuser Kg Extruding high molecular polyethylene foil
US4115047A (en) * 1976-09-07 1978-09-19 Stelmack Joseph J Apparatus for quenching blown films
EP0483562A1 (fr) * 1990-10-27 1992-05-06 Linde Aktiengesellschaft Procédé de fabrication de films tubulaires
US5891383A (en) * 1994-06-03 1999-04-06 Joseph; Daniel R. Method and apparatus for cooling extruded film tubes
EP1491319A1 (fr) * 2003-06-24 2004-12-29 K Design GmbH Procédé et dispositif de fabrication de feuilles soufflées
DE102007039965A1 (de) * 2007-08-23 2009-02-26 Bischof + Klein Gmbh & Co. Kg Verfahren und Vorrichtung zur Herstellung von Blasfolien

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004106492A (ja) * 2002-09-20 2004-04-08 Seiji Kagawa ポリブチレンテレフタレートフィルムの製造方法、並びに機能性ポリブチレンテレフタレートフィルム及び用途

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB887966A (en) * 1959-09-14 1962-01-24 Union Carbide Corp Method of apparatus for producing tubular films of thermoplastic polymeric material
DE2006798A1 (en) * 1970-02-14 1971-08-26 Reifenhaeuser Kg Extruding high molecular polyethylene foil
US4115047A (en) * 1976-09-07 1978-09-19 Stelmack Joseph J Apparatus for quenching blown films
EP0483562A1 (fr) * 1990-10-27 1992-05-06 Linde Aktiengesellschaft Procédé de fabrication de films tubulaires
US5891383A (en) * 1994-06-03 1999-04-06 Joseph; Daniel R. Method and apparatus for cooling extruded film tubes
EP1491319A1 (fr) * 2003-06-24 2004-12-29 K Design GmbH Procédé et dispositif de fabrication de feuilles soufflées
DE102007039965A1 (de) * 2007-08-23 2009-02-26 Bischof + Klein Gmbh & Co. Kg Verfahren und Vorrichtung zur Herstellung von Blasfolien

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103434130A (zh) * 2013-09-04 2013-12-11 南京沪江复合材料有限公司 一种吹膜机膜泡隔热保护罩

Also Published As

Publication number Publication date
CN103391838A (zh) 2013-11-13
CN103391838B (zh) 2016-10-26

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