WO2007102737A1 - Dispositif et procede d'injection de fluide atomise dans l'air de soufflage pendant le moulage par soufflage de corps creux - Google Patents

Dispositif et procede d'injection de fluide atomise dans l'air de soufflage pendant le moulage par soufflage de corps creux Download PDF

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Publication number
WO2007102737A1
WO2007102737A1 PCT/NO2006/000084 NO2006000084W WO2007102737A1 WO 2007102737 A1 WO2007102737 A1 WO 2007102737A1 NO 2006000084 W NO2006000084 W NO 2006000084W WO 2007102737 A1 WO2007102737 A1 WO 2007102737A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
hollow body
pressure
injection
inlet
Prior art date
Application number
PCT/NO2006/000084
Other languages
English (en)
Inventor
Tore Brynildsrud
Original Assignee
Finn Brynildsrud & Sønner As
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 Finn Brynildsrud & Sønner As filed Critical Finn Brynildsrud & Sønner As
Priority to EP06733089A priority Critical patent/EP1996386A4/fr
Priority to PCT/NO2006/000084 priority patent/WO2007102737A1/fr
Publication of WO2007102737A1 publication Critical patent/WO2007102737A1/fr

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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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/64—Heating or cooling preforms, parisons or blown articles
    • B29C49/66—Cooling by refrigerant introduced into the blown article
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/64—Heating or cooling preforms, parisons or blown articles
    • B29C49/6604—Thermal conditioning of the blown article
    • B29C2049/6606—Cooling the article
    • B29C2049/6653—Cooling the article the medium being other than cooled air
    • B29C2049/6669—Gas with water droplets

Definitions

  • the present invention pertains to a atomiser for the addition of water to blow air, with a main pipe with a main conduit with an inlet for blow air at a first end and an outlet at a second end for blow air for the inflation of a hollow body of molten plastic or the like in a mould.
  • the last stage, the cooling stage, is time intensive especially when forming more thick-walled pieces.
  • the external cooling takes place through contact with the water cooled mould tool. Internally the cooling takes place usually by means of a return air system which blows cooling air into the hollow of the piece to bring heat out of the detail.
  • a return air system which blows cooling air into the hollow of the piece to bring heat out of the detail.
  • water may be added to the blow air in the shape of atomised water. This significantly increases the internal cooling.
  • the use of water as such is known. It is however problematic to find a practical manner in which to rebuild existing blow moulding machines without supplying additional sensors and energy sources for the addition of atomised water to the blow air, and to regulate the initialisation and duration of the atomisation of the water.
  • US2004/0156942 describes a system for the cooling of an internal surface in a hollow body wherein a cooling medium such as air or air amixed with water is blown into the hollow body which is being produced. A closed loop system then leads the cooling medium through a series of processes for the extraction of heat, for compression and the like.
  • US2004/0156942 does not however describe a atomiser in which the opening of the valve for the injection of the cooling media is done by the pressure which is formed in an air outlet within a blow tool after the hollow body completely fills the form in which it is moulded.
  • the abovementioned patent publication solely describes a system which is externally driven and which is not dependent on process parameters such as the internal pressure in the hollow body. Thus the above system is more costly as well as more complicated as it relies on additional sensors and the like for its correct functioning.
  • a solution to the abovementioned problem is according to the invention a atomiser for the addition of water to blow air with a main pipe with a main conduit with an inlet for blow air at a first end, and an outlet for blow air at a second end for the inflation of a hollow body of molten plastic or the like in a mould, in which said main pipe is furnished with an inlet for water or other cooling liquid to an atomiser with an outlet centrally in said main pipes main conduit.
  • an air inlet from the main conduit is arranged upstream from said main pipe with respect to said spray diffuser, arranged for directing air out from said main conduit when the inflation of said hollow body has filled said mould, in order for when the pressure in said air outlet rises above a given pressure during the insufflation process, indicating that said hollow body has filled the mould and that the pressure from said air outlet controls the tripping of a valve for injection of water to the inlet for atomisation in said spray diffuser for the cooling of the internal surface of said hollow body.
  • 1 and 2 Time regulators with volumetric expansions marked 1' and 2'.
  • 3 Air cylinder with a shared piston rod with a water cylinder. 4
  • Deareation valve 5 Reduction valve 6
  • Water cylinder 7 Dosage valve 9
  • External pressure source 10 Manual shut off valve
  • FIG. 2 is a cross-section of a spray diffuser according to the invention with the following details:
  • the water injection into the blow air may take place by means of two energy sources:
  • the air from the counter pressure may in one embodiment of the invention be added from the atomiser a distance ahead of the water injection.
  • Other cooling fluids than water may also be used, but water has the advantage of having a large heat capacity and a large heat of evaporation.
  • the air is distributed to a pressure cylinder (3), to a deareation valve (4) to a reduction valve (5), to two time regulators (1 and 2) with respective volumetric expansions marked 1' and 2' (see Figure 1).
  • valve (6) is normally closed, but is opened by the action of the manoeuvre air.
  • the first time regulator (1) regulates the moment upon which said valve (6) shall open.
  • the second time regulator (2) regulates the moment upon which said valve (6) shall close.
  • Cylinder (3 and 8) with respective connected pistons is a pressure riser system that in each end is provided with a check valve.
  • the required amount of water varies with the volume and weight and wall thickness of the blown detail. Due to the atomisation of the water it has been demonstrated that the effect is very large. Apart from the installation costs the running costs are almost absent.
  • the system has on an experimental basis been essayed at a Norwegian factory. During trials with atomised water in the blow air, one has used about 13Og of water to cool a blow moulded detail of 7 kg. Utilising the blow air pressure and counter pressure ensures that the necessary power intake and the necessary control signals for the functioning of the system automatically arrive at the correct time and in the correct order.
  • an external pressure source (9) may provide further pressure support for the injection of water into the atomiser. This may be useful when blow moulding larger pieces.
  • the external pressure source (9) may be shut off manually by the use of a shut off valve (10).

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles (AREA)

Abstract

L'invention concerne un atomiseur destiné à ajouter de l'eau ou un autre fluide à de l'air de soufflage à l'aide d'une canalisation principale (20) comportant un conduit principal (27) doté d'une entrée (22) d'air de soufflage à une première extrémité (21) et d'une sortie (24) d'air de soufflage à une deuxième extrémité (23) en vue du gonflage d'un corps creux en plastique fondu ou similaire dans un moule, ladite canalisation principale (20) étant pourvue d'une entrée (26) d'eau vers une buse (25) d'atomisation dotée d'une sortie en position centrale dans ledit conduit principal (27) de ladite canalisation principale (20), caractérisé par une sortie (28) d'air issue dudit conduit principal (27) disposée en amont de ladite buse (25) d'atomisation en vue de diriger l'air hors dudit conduit principal (27) lorsque le gonflage dudit corps creux a rempli ledit moule, de sorte que lorsque la pression dans ladite sortie (28) d'air dépasse une pression donnée au cours du processus d'insufflation, une indication est donnée selon laquelle ledit corps creux a rempli ledit moule (30) et la pression issue de ladite sortie (28) d'air commande le déclenchement d'une vanne (6) pour l'injection d'eau vers ladite entrée (26) en vue de son atomisation à l'intérieur de ladite buse (25) d'atomisation afin de refroidir la surface intérieure dudit corps creux.
PCT/NO2006/000084 2006-03-07 2006-03-07 Dispositif et procede d'injection de fluide atomise dans l'air de soufflage pendant le moulage par soufflage de corps creux WO2007102737A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP06733089A EP1996386A4 (fr) 2006-03-07 2006-03-07 Dispositif et procede d'injection de fluide atomise dans l'air de soufflage pendant le moulage par soufflage de corps creux
PCT/NO2006/000084 WO2007102737A1 (fr) 2006-03-07 2006-03-07 Dispositif et procede d'injection de fluide atomise dans l'air de soufflage pendant le moulage par soufflage de corps creux

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/NO2006/000084 WO2007102737A1 (fr) 2006-03-07 2006-03-07 Dispositif et procede d'injection de fluide atomise dans l'air de soufflage pendant le moulage par soufflage de corps creux

Publications (1)

Publication Number Publication Date
WO2007102737A1 true WO2007102737A1 (fr) 2007-09-13

Family

ID=38475115

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2006/000084 WO2007102737A1 (fr) 2006-03-07 2006-03-07 Dispositif et procede d'injection de fluide atomise dans l'air de soufflage pendant le moulage par soufflage de corps creux

Country Status (2)

Country Link
EP (1) EP1996386A4 (fr)
WO (1) WO2007102737A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103358536A (zh) * 2013-06-19 2013-10-23 江阴升辉包装材料有限公司 一种吹塑机的吹膜排气装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3287762A (en) * 1963-11-07 1966-11-29 Phillips Petroleum Co Blow molding apparatus
US3937610A (en) * 1973-12-21 1976-02-10 Farrell Patent Company Mist cooling of inside of blown plastic articles
JPH07237262A (ja) * 1994-02-28 1995-09-12 Placo Co Ltd 中空成形方法
JPH0985817A (ja) * 1995-09-27 1997-03-31 Showa Denko Kk 中空成形内部冷却用吹込ピン
JPH10296844A (ja) * 1997-04-30 1998-11-10 Kyoraku Co Ltd ブロー成形品の冷却方法およびその装置
US20040156942A1 (en) * 2001-07-10 2004-08-12 Schulze Uphoff Heinrich Josef Method and device for the production of blown hollow bodies

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3520020A (en) * 1968-01-22 1970-07-14 Phillips Petroleum Co Apparatus for cooling thermoformed articles
JPH06234153A (ja) * 1993-02-12 1994-08-23 Nissan Motor Co Ltd ブロー成形方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3287762A (en) * 1963-11-07 1966-11-29 Phillips Petroleum Co Blow molding apparatus
US3937610A (en) * 1973-12-21 1976-02-10 Farrell Patent Company Mist cooling of inside of blown plastic articles
JPH07237262A (ja) * 1994-02-28 1995-09-12 Placo Co Ltd 中空成形方法
JPH0985817A (ja) * 1995-09-27 1997-03-31 Showa Denko Kk 中空成形内部冷却用吹込ピン
JPH10296844A (ja) * 1997-04-30 1998-11-10 Kyoraku Co Ltd ブロー成形品の冷却方法およびその装置
US20040156942A1 (en) * 2001-07-10 2004-08-12 Schulze Uphoff Heinrich Josef Method and device for the production of blown hollow bodies

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1996386A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103358536A (zh) * 2013-06-19 2013-10-23 江阴升辉包装材料有限公司 一种吹塑机的吹膜排气装置
CN103358536B (zh) * 2013-06-19 2015-10-21 江阴升辉包装材料有限公司 一种吹塑机的吹膜排气装置

Also Published As

Publication number Publication date
EP1996386A4 (fr) 2012-09-12
EP1996386A1 (fr) 2008-12-03

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