US20130133861A1 - Unit for cooling a film made of synthetic material - Google Patents

Unit for cooling a film made of synthetic material Download PDF

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Publication number
US20130133861A1
US20130133861A1 US13/699,076 US201113699076A US2013133861A1 US 20130133861 A1 US20130133861 A1 US 20130133861A1 US 201113699076 A US201113699076 A US 201113699076A US 2013133861 A1 US2013133861 A1 US 2013133861A1
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US
United States
Prior art keywords
heat transfer
cooling
transfer liquid
tank
cooling tank
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.)
Abandoned
Application number
US13/699,076
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English (en)
Inventor
Jean-Pierre Darlet
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of US20130133861A1 publication Critical patent/US20130133861A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/16—Cooling
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/16—Cooling
    • B29C2035/1616—Cooling using liquids
    • 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
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
    • B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
    • B29C55/14—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial successively
    • B29C55/143—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial successively firstly parallel to the direction of feed and then transversely thereto

Definitions

  • the present invention relates to a cooling unit for a film in synthetic material, and preferably a film in a biaxially oriented (bi-oriented) synthetic material.
  • Bi-oriented synthetic material films are obtained from an extruded ribbon, after having deposited the molten material (polypropylene, polyester, polyamide, PVC, etc.) on a casting drum, or a cooling drum, cooled by circulation of fluid so as to slow down the crystallization of the film and to allow its subsequent drawing.
  • molten material polypropylene, polyester, polyamide, PVC, etc.
  • the extruded ribbon cooled in a cooling tank after its passing over the casting drum, then passes into a longitudinal drawing machine equipped with preheating cylinders intended to heat up the ribbon to the drawing temperature, and with a train of cylinders driven at different rates and intended to longitudinally draw the ribbon.
  • the ribbon thereby drawn in its longitudinal direction then penetrates into a transverse drawing machine which includes two groups of nips which respectively take the ribbon of both of its sides, both groups of nips being mounted on chains, the spacing of which increases gradually until it attains the desired width.
  • a suitable device opens the nips and allows the thereby formed film to be transferred, after cooling on a set of cylinders, to a winding device at which the film is wound on a storage roll.
  • a cooling unit formed by a cooling drum and a cooling tank presently requires the use of a cooling unit producing water at a temperature from 10 to 11° C. intended to feed a water/water exchanger which allows the temperature of water circulating in two different circuits, one feeding circulation internal to the casting drum, the other one feeding circulation internal to the cooling tank to be maintained at a temperature of 35° C.
  • the internal circulation to the casting drum is achieved, in the present state of the art, by circulation of water inside helical channels, either crossed or not, extending along the internal face of the casting drum, or by using water jets projecting water on the internal face of the latter.
  • the cooling drum In order to obtain a film in a synthetic material which may be transformed subsequently under optimum conditions, it is essential that the cooling drum have very large regularity of temperature over the whole of its surface intended to be in contact with the film on the one hand and ensure rapid cooling of the latter on the other hand.
  • the circuit internal to the cooling tank provides, in the present state of the art, significant circulation of amounts of water generally injected into the cooling tank by means of ramps which have significant pressure drops and also require the presence of energy-consuming pumps.
  • the present invention aims at finding a remedy to these drawbacks.
  • the technical problem at the basis of the invention therefore comprises providing a cooling unit which is of a simple structure and which allows reduction in significant proportions of the energy expenditures required for producing a film in synthetic material.
  • the present invention relates to a cooling unit for a film in synthetic material, including:
  • the cooling drum comprises a shell having two lateral flanges at least partly openworked so that the inside of the shell is at least partly filled with the heat transfer liquid
  • the cooling tank includes at least one heat transfer liquid supply mouth laid out for supplying heat transfer liquid to the cooling tank, said at least one heat transfer liquid supply mouth being located facing one of the flanges of the shell.
  • At least one supply mouth is laid out so as to feed with heat transfer liquid the inside of the shell of the drum, which further promotes stirring of the heat transfer liquid volume comprised inside the shell, and therefore homogenization of the temperature of this heat transfer liquid volume.
  • At least said one supply mouth is laid out for feeding with heat transfer liquid the inside of the shell of the drum and the cooling tank simultaneously.
  • the heat transfer liquid contained in the cooling tank is water.
  • the unit according to the invention allows the use of a drum without any circulation channels, and of spray devices, with which the manufacturing costs of the drum may be reduced.
  • the unit includes a retention tank and a heat transfer liquid circulation circuit comprising at least one conduit for supply a heat transfer liquid, connecting the retention tank to the cooling tank and laid out for supplying heat transfer liquid to the cooling tank, and at least one return conduit connecting the cooling tank to the retention tank and laid out for discharging the heat transfer liquid contained in the tank to the retention tank.
  • a heat transfer liquid circulation circuit comprising at least one conduit for supply a heat transfer liquid, connecting the retention tank to the cooling tank and laid out for supplying heat transfer liquid to the cooling tank, and at least one return conduit connecting the cooling tank to the retention tank and laid out for discharging the heat transfer liquid contained in the tank to the retention tank.
  • the retention tank is positioned below the cooling tank.
  • the heat transfer liquid intended to feed the cooling drum/cooling tank unit is taken from the retention tank located immediately below the unit, therefore in proximity to the latter.
  • the unit includes a refrigerating unit laid out for cooling a heat transfer fluid, and at least one coil positioned in the retention tank and the ends of which are connected to the refrigerating unit so that said heat transfer fluid may circulate in said coil.
  • the heat transfer fluid according to one embodiment is Freon.
  • the circuit for circulating a heat transfer liquid includes a pump laid out for supplying a heat transfer liquid to said at least one supply mouth.
  • the inner wall of the shell may have surface roughness, and be provided with a plurality of fins distributed over its surface, and preferably regularly distributed over its surface.
  • the shell is made in a metal having a high thermal conductivity coefficient.
  • the unit includes rotary driving means, laid out for driving the shell into rotation around a substantially horizontal axis.
  • FIG. 1 is a schematic side view of a cooling unit according to the invention.
  • FIG. 2 is a schematic sectional view of the cooling unit of FIG. 1 .
  • FIGS. 1 and 2 illustrate a unit 2 for cooling a film in synthetic material.
  • Such a cooling unit 2 is more particularly intended to be integrated into a production line for a film in synthetic material and to be positioned between an extruder and drawing equipment of such a production line.
  • the cooling unit 2 includes a cooling tank 3 partly filled with a heat transfer liquid, such as water, and a cooling drum 4 partly immersed in the cooling tank 3 .
  • a heat transfer liquid such as water
  • the cooling drum 4 comprises a shell 5 having two lateral flanges 6 partly openworked so that the inside of the shell 5 is partly filled with the heat transfer liquid contained in the cooling tank 3 .
  • the cooling drum 4 is positioned below a die 7 for shaping an extruded ribbon 8 intended to be cooled by the cooling drum 4 .
  • the shell 5 is advantageously made in a metal having a high thermal conductivity coefficient.
  • the inner wall 9 of the shell preferably has surface roughness, and may also be provided with a plurality of fins distributed over its surface, and preferably regularly distributed over its surface.
  • the cooling unit 2 includes rotary driving means, laid out in order to drive the shell 5 into rotation around a substantially horizontal axis.
  • the rotary driving means preferably include two coaxial shafts 11 , each connected to one of the flanges 6 of the shell, and at least one driving motor (not illustrated in the figures) coupled with one of the shafts.
  • the cooling tank 3 includes two mouths 12 for feeding heat transfer liquid, laid out in order to supply a heat transfer liquid to the cooling tank.
  • Each heat transfer liquid supply mouth 12 is advantageously located facing one of the flanges 6 of the shell 5 .
  • the cooling unit 2 further comprises a retention tank 13 positioned below the cooling tank 3 , and a circuit for circulating a heat transfer liquid 14 connected to the cooling 3 and retention 13 tanks.
  • the circuit for circulating a heat transfer liquid 14 comprises two conduits for feeding a heat transfer liquid 15 each connecting the retention tank 13 to the cooling tank 3 and laid out in order to supply heat transfer liquid to the cooling tank 3 , and two return conduits each connecting the cooling tank 3 to the retention tank 13 and laid out in order to discharge the heat transfer liquid contained in the cooling tank to the retention tank.
  • the cooling unit 2 also includes a refrigerating unit 17 laid out for cooling a heat transfer fluid, and two coils 18 positioned in the retention tank 13 and the ends of which are connected to the refrigerating unit 17 so that said heat transfer fluid may circulate in both coils.
  • the circuit for circulating a heat transfer liquid 14 includes a pump laid out for feeding heat transfer liquid to both heat transfer liquid supply conduits 15 and both supply mouths 12 .

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
US13/699,076 2010-06-02 2011-05-17 Unit for cooling a film made of synthetic material Abandoned US20130133861A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR1054290A FR2960815B1 (fr) 2010-06-02 2010-06-02 Ensemble de refroidissement d'un film en matiere synthetique
FR1054290 2010-06-02
PCT/FR2011/051096 WO2011151556A1 (fr) 2010-06-02 2011-05-17 Ensemble de refroidissement d'un film en matière synthétique

Publications (1)

Publication Number Publication Date
US20130133861A1 true US20130133861A1 (en) 2013-05-30

Family

ID=43567556

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/699,076 Abandoned US20130133861A1 (en) 2010-06-02 2011-05-17 Unit for cooling a film made of synthetic material

Country Status (5)

Country Link
US (1) US20130133861A1 (fr)
EP (1) EP2576170B1 (fr)
CN (1) CN103068543B (fr)
FR (1) FR2960815B1 (fr)
WO (1) WO2011151556A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103878914A (zh) * 2012-12-19 2014-06-25 海安海太铸造有限公司 一种滚筒切片机中的冷却水制冷装置
CN115582948B (zh) * 2022-09-29 2023-09-08 盐城优博特新材料有限公司 一种塑料薄膜涂层成型冷却装置

Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191029831A (en) * 1910-12-22 1911-12-21 Soeren Peter Rasmussen Improvements in the Mode of and Apparatus for Cooling Margarine Emulsions and other Liquids or Semi-liquids.
US1391975A (en) * 1920-06-05 1921-09-27 American Cotton Oil Company Method for molding and cooling soap
US1839202A (en) * 1927-07-14 1932-01-05 Charles H Crowell Process for treating material by mixtures which thicken under cooking
US2226186A (en) * 1937-11-19 1940-12-24 Eastman Kodak Co Film casting element
US2362985A (en) * 1941-12-24 1944-11-21 Brown Fintube Co Heat exchanger
US3027595A (en) * 1959-11-27 1962-04-03 Takai Unokichi Apparatus and method of continuous molding of a thermoplastic sheet having fine pile-like projections
US3215558A (en) * 1959-02-16 1965-11-02 Edward E Dascher Method of coating metal foils with a polymerizable resinous coating
US3240853A (en) * 1961-06-01 1966-03-15 Us Rubber Co Thermoplastic film making
US3723035A (en) * 1970-10-29 1973-03-27 Fuller Co H Apparatus for forming hot melt adhesives into a readily packageable form
US3808700A (en) * 1972-12-26 1974-05-07 Kimberly Clark Co Rotary drying drum
US3824049A (en) * 1970-03-13 1974-07-16 Eastman Kodak Co Vessel for quenching cast sheeting
US4048810A (en) * 1975-04-28 1977-09-20 Sten Olof Zeilon Refrigerating process and apparatus therefor
US4128124A (en) * 1976-02-17 1978-12-05 Worthington Mark N Multi-mode solar heating and cooling system
US4993478A (en) * 1990-03-16 1991-02-19 Battelle Development Corporation Uniformly-cooled casting wheel
US5036242A (en) * 1989-10-19 1991-07-30 Atlas Electric Devices Company Lamp cooling system
US5084227A (en) * 1989-06-12 1992-01-28 Agfa-Gevaert N. V. Process of cooling a heated polymer film
US5318648A (en) * 1989-06-08 1994-06-07 Cmb Foodcan Plc Laminates of metal and polyester film
US5682946A (en) * 1995-03-21 1997-11-04 Km Europa Metal Aktiengesellschaft Tube for use in a heat exchanger

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1504030B2 (de) * 1964-12-01 1971-07-08 JP Bemberg AG, 5600 Wuppertal Verfahren zum kuehlen einer transparenten folien bahn aus einem thermoplastischem kunststoff bei ihrer herstellung
US3276076A (en) * 1965-05-27 1966-10-04 Fmc Corp Apparatus for making thick polymeric articles
GB1183693A (en) * 1967-08-23 1970-03-11 Firestone Tire & Rubber Co Process for Manufacturing Product of Cross-Linkable Polymeric Material.
LU64228A1 (fr) * 1970-11-12 1972-08-03
JPS61106222A (ja) * 1984-10-30 1986-05-24 Mitsui Toatsu Chem Inc 合成樹脂フイルム製膜装置
US4749535A (en) * 1985-04-05 1988-06-07 Yasuo Matsuda Method and apparatus for forming profiled plastic products involving extrusion, roller shaping and cutting
US5952017A (en) * 1994-12-16 1999-09-14 Taisei Kako Co., Ltd. Pressure roll, and molding apparatus using the pressure roll
SE512151C2 (sv) * 1998-06-26 2000-02-07 Eco Lean Ab Kalanderanordning

Patent Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191029831A (en) * 1910-12-22 1911-12-21 Soeren Peter Rasmussen Improvements in the Mode of and Apparatus for Cooling Margarine Emulsions and other Liquids or Semi-liquids.
US1391975A (en) * 1920-06-05 1921-09-27 American Cotton Oil Company Method for molding and cooling soap
US1839202A (en) * 1927-07-14 1932-01-05 Charles H Crowell Process for treating material by mixtures which thicken under cooking
US2226186A (en) * 1937-11-19 1940-12-24 Eastman Kodak Co Film casting element
US2362985A (en) * 1941-12-24 1944-11-21 Brown Fintube Co Heat exchanger
US3215558A (en) * 1959-02-16 1965-11-02 Edward E Dascher Method of coating metal foils with a polymerizable resinous coating
US3027595A (en) * 1959-11-27 1962-04-03 Takai Unokichi Apparatus and method of continuous molding of a thermoplastic sheet having fine pile-like projections
US3240853A (en) * 1961-06-01 1966-03-15 Us Rubber Co Thermoplastic film making
US3824049A (en) * 1970-03-13 1974-07-16 Eastman Kodak Co Vessel for quenching cast sheeting
US3723035A (en) * 1970-10-29 1973-03-27 Fuller Co H Apparatus for forming hot melt adhesives into a readily packageable form
US3808700A (en) * 1972-12-26 1974-05-07 Kimberly Clark Co Rotary drying drum
US4048810A (en) * 1975-04-28 1977-09-20 Sten Olof Zeilon Refrigerating process and apparatus therefor
US4128124A (en) * 1976-02-17 1978-12-05 Worthington Mark N Multi-mode solar heating and cooling system
US5318648A (en) * 1989-06-08 1994-06-07 Cmb Foodcan Plc Laminates of metal and polyester film
US5084227A (en) * 1989-06-12 1992-01-28 Agfa-Gevaert N. V. Process of cooling a heated polymer film
US5036242A (en) * 1989-10-19 1991-07-30 Atlas Electric Devices Company Lamp cooling system
US4993478A (en) * 1990-03-16 1991-02-19 Battelle Development Corporation Uniformly-cooled casting wheel
US5682946A (en) * 1995-03-21 1997-11-04 Km Europa Metal Aktiengesellschaft Tube for use in a heat exchanger

Also Published As

Publication number Publication date
EP2576170A1 (fr) 2013-04-10
EP2576170B1 (fr) 2014-06-11
FR2960815A1 (fr) 2011-12-09
CN103068543A (zh) 2013-04-24
FR2960815B1 (fr) 2012-05-25
CN103068543B (zh) 2015-12-16
WO2011151556A1 (fr) 2011-12-08

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