WO2002092324A1 - Dispositif d'injection de fluide propre dans une paraison en matiere plastique - Google Patents
Dispositif d'injection de fluide propre dans une paraison en matiere plastique Download PDFInfo
- Publication number
- WO2002092324A1 WO2002092324A1 PCT/FR2002/001613 FR0201613W WO02092324A1 WO 2002092324 A1 WO2002092324 A1 WO 2002092324A1 FR 0201613 W FR0201613 W FR 0201613W WO 02092324 A1 WO02092324 A1 WO 02092324A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cannula
- sheath
- bore
- housing
- cannula holder
- 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.)
- Ceased
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
- 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
- B29C49/58—Blowing means
- B29C49/60—Blow-needles
-
- 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
-
- 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
- B29C49/58—Blowing means
- B29C49/60—Blow-needles
- B29C2049/6092—Blow needle sterilization
Definitions
- the present invention relates to improvements made to the devices for injecting fluid into a plastic parison, and in particular to the devices for blowing a plastic parison for the purpose of manufacturing a container, such as a bottle, flask. , ...
- the invention relates to improvements made to those of these fluid injection devices which comprise a body provided with a housing for receiving a portion of a parison and
- portion of a parison is intended to denote part of a parison which is intended to be pierced by the cannula so that fluid is injected into the parison.
- it may be an end portion (single parison) or a central portion (double parison) which is pierced by a needle of a blowing device and which, once the (s) final container (s) shaped, is sectioned and disposed of.
- the object of the invention is essentially to propose an original technical solution which allows the injection of a clean, even sterile fluid, with a faculty of cleaning the end of the cannula only by circulation of a cleaning fluid adapted to the degree of cleanliness or sterility required without manual intervention.
- a device as mentioned in the preamble is characterized, being arranged in accordance with the invention, in that it further comprises a tubular sheath which surrounds the cannula holder and the cannula and which is axially displaceable in the bore independently of the cannula holder so as to selectively occupy
- said sheath comprising at least one lateral orifice • normally closed by the cannula holder when the sheath is in the retracted position and • uncovered only when simultaneously the cannula holder is in its fully protruding position and the scabbard is in its completely protruding position.
- a clean cleaning fluid can be injected through the cannula while, no portion of a parison being present in the housing, the cannula holder is in the projecting position and the sheath is in the projecting position in sealed frontal abutment against the opposite wall of said housing: thus the aforesaid lateral orifice of the sheath is discovered through which the cleaning fluid leaving the cannula is directed, externally to the sheath, towards a evacuation passage in the body; then the blowing of the cleaning fluid is interrupted and the sheath is returned to its retracted position, causing the concomitant obturation of the aforesaid lateral orifice.
- the cannula holder is, in its rear part opposite the end of the cannula, arranged in the form of a piston suitable for cooperating in leaktight sealing with the rear part of the bore and at least one pressure control fluid delivery orifice is provided in the bore on one side of the said piston to control the unidirectional movement of the cannula holder; advantageously then, two pressure control fluid delivery orifices are provided in the bore on either side of the aforesaid piston to control the selective bidirectional movement of the cannula holder.
- the pressure control fluid is a gas, such as compressed air normally available in this type of installation.
- the bore in its front part (that is to say that located on the housing side), houses a fixed jacket cooperating in leaktight manner with the cannula holder, said jacket and the cannula holder defining between them an annular chamber in which the sheath is installed and which is sealingly isolated from the rear part of the bore in which the piston of the cannula holder is movable; the sheath is, in its rear part, shaped as a piston cooperating in a sliding leaktight manner with the jacket; and at least one pressure control fluid delivery orifice is provided in the jacket on one side of the barrel piston to control the unidirectional movement of the barrel.
- a return spring to be interposed between the sheath, on one side, and the jacket and / or the body, on the other side, to recall the sheath moved under the action of the control fluid under pressure.
- the spring is arranged to return the sheath in the retracted position inside the jacket and that a pressure control fluid delivery orifice is provided in the jacket between the bottom of the latter.
- the front end of the sheath is formed in the form of an annular seal, for example made of elastomer, capable of being in leaktight abutment against the wall of the housing opposite to the hole in the bore when the sleeve is in the extended position.
- the housing suitable for receiving the aforementioned parison portion to be substantially round and for the bore to open out substantially radially in said housing, the sheath extending substantially diametrically in said housing when it is in the extended position.
- a preferred application of the provisions of the invention which have been mentioned above relates to a device for blowing clean a plastic container from a parison.
- a blowing needle capable of piercing the aforementioned parison portion constitutes the aforesaid cannula and a needle holder constitutes the aforesaid cannula holder.
- FIG. 1 to 3 are sectional views of a preferred embodiment of the invention shown respectively in three different functional positions, respectively in the inactive position, in the filling position and in the cleaning position; and FIG. 4 is a view on a larger scale of a part of the device in the functional position of FIG. 3.
- FIG. 1 which shows the device of the invention in the rest position or inactive position
- said device generally designated by the reference numeral 1
- the part 2b comprises a housing 3, blind and open towards the bottom, suitable for receiving a portion (not shown) of a parison made of plastic material (in particular PVC, high density polyethylene, etc.) intended for the manufacture of a container, such as a bottle, flask or the like, by a blowing process.
- the part 2a and a part of the part 2b have an elongated bore 4, extending transversely to the housing 3 and opening laterally into the latter.
- the housing 3 is substantially round and the bore 4 opens substantially radially into said housing 3.
- a tubular cannula holder 5 fixedly supporting an injection cannula 6 (here shown in the form of an injection needle).
- the injection cannula 6 is blocked axially in the cannula holder 5 by a tight plug 7 so that the cannula holder 5 and the cannula 6 constitute a functional unit which will be considered as such in the following description.
- the cannula holder 5 is provided with an enlarged head 8 cooperating sealingly with a cylindrical part 9 of enlarged diameter of the bore 4.
- the rear end of the bore 4 is closed by a tight plug 10.
- Two orifices respectively 11, 12 open into the cylindrical part 9 at the rear and front ends thereof, c 'is to say on either side of the enlarged head 8 of the cannula holder which forms piston.
- the selective introduction of a pressurized control fluid through the orifice 11 or the orifice 12 makes it possible to move the cannula holder 5 respectively forwards or backwards.
- the cannula holder 5 being tubular, remains hollowed out in its rear part at 13 and an axial fixed arm 14, for example integral with the plug 10 or with an insert against it, extends in the central recess 13 of the cannula holder 5.
- a finger 15 projecting radially at the end of the arm 14 is engaged in a longitudinal groove 16 of the recess 13, so that the cannula holder 5 can slide freely in the body 2, but is blocked rotating in it.
- a part 17 of the bore 4 In front of the cylindrical part 9 of the bore 4 is provided a part 17 of the bore 4 radially distant from the cannula holder 5 and defining therewith an annular chamber 18.
- a seal 19, for example of the lip seal type, is interposed between the bore 4 and the cannula holder 5 to physically separate the parts 9 and 17 and make the chamber 18 autonomous with respect to the cylinder 9 in which the piston 8 moves.
- the cannula holder 5 In its part in correspondence with the chamber 18, the cannula holder 5 is provided with one or more through radial bores 21 and, opposite, the cannula 6 is itself provided with one or more radial bores through 22 which open into its axial central channel 30.
- the cannula holder 5 In its front part (that is to say on the side of the housing 3), the cannula holder 5 is surrounded in a leaktight manner by a tubular sheath 23 movable axially and which, in the rest position shown in FIG. 1, extends beyond the active end of the cannula 6.
- a fixed jacket 24 forming a cylinder with which a rear portion 25 of enlarged diameter of the sheath 23 forming the piston cooperates.
- One or more radial passages 26 pass through the jacket 24 behind the piston 25 and communicate, through an annular chamber 27 provided at the interface of the jacket 24 and the part 2a of the body, with an orifice (not visible) of the body delivering a pressurized control fluid.
- a helical return spring 28, surrounding the sheath 23, is interposed between the piston 25 and a shoulder of the part 2b.
- the sheath 23 is constituted as an axially movable element which is functionally independent of the cannula holder 5 and of the cannula 6.
- the sheath 23 is provided with a frontal seal 29, for example made of elastomer.
- the sheath 23 In its part close to the piston 25, the sheath 23 has one or more radial through passages 33, which, in the rest position illustrated in Figure 1, are located in correspondence with the cannula holder 5 and are therefore closed. These radial passages 33 open into an annular chamber 34 defined between the sheath 23 and the shirt 24 radially spaced from one another. At the front end of the chamber 34 open one or more evacuation orifices 35 corresponding to one or more evacuation channels 36 drilled in the part 2b of the body.
- Figure 1 the device is illustrated in its rest or inactive position.
- the cannula holder 5 is held in the retracted position towards the rear under the effect of the control fluid supplied by the orifice 12 and acting on the piston 8.
- the needle is then erased in the bore 4.
- the sheath 23 is held in the retracted position and is erased inside the bore 4.
- the housing 3 is thus released and ready to receive a portion of a parison to be blown .
- the device is illustrated in its functional blowing position, a parison portion (not shown) being assumed to be in place in the housing 3.
- Pressure fluid under pressure introduced through the rear orifice 11 acts on the piston 8 and pushes the cannula holder 5 forward until it comes into abutment against the sleeve 24.
- the anterior end of the cannula or of the needle 6 is introduced radially into the housing 3 and pierces the portion of parison which is maintained there.
- Pressure blowing fluid is then admitted into the chamber 18 through the orifice 20 and from there into the needle 6 through the passages 21 and 22. This fluid is thus introduced into the container so that it is blown .
- pressure control fluid is introduced through the orifice 12 to act on the piston 8 and push the cannula holder 5 and the needle 6 backwards.
- FIG. 3 the device is illustrated in the cleaning position of the cannula or needle 6. No portion of parison is introduced into the housing 3, which is therefore empty.
- the cannula holder 5 is moved in the direction of the housing 3 and the cannula or needle 6 is introduced into the housing 3 by proceeding as described above with reference to FIG. 2.
- the sheath 23 is moved forward until the front seal 29 comes to press against the wall of the housing 3 which is opposite the bore 4.
- the cannula or needle 6 is enclosed in the internal volume 31 of the sheath 23 closed in a sealed manner.
- the cannula holder 5 has its front end which has a reduced diameter and which defines, with the facing surface of the sheath 23, an annular gap 32.
- the sheath 23 being moved forward, the through passages 33 of the sheath are located opposite the annular gap 32 above (while in the retracted position of the sheath 23 illustrated in Figures 1 and 2 , the passages 23 are located behind the annular gap 23, thus being closed off by the wall of the cannula holder 5 as already indicated).
- the cleaning fluid which leaves the cannula or needle 6 in the volume 31 flows in the annular gap 32, passes through the passages 33 in the annular chamber 34 formed between the cannula holder 5 and the jacket 24, and from there exits through the evacuation orifice 35 provided in the jacket 24 and in communication with an evacuation channel 36 drilled in the part 2b of the body.
- the provisions of the invention find a particularly advantageous application in devices for blowing a plastic container (for example PVC, high density polyethylene, etc.) by blowing a fluid (generally a gas) under pressure in a parison pierced with a needle blower whose perforating tip can get dirty on contact with the plastic material it pierces.
- a plastic container for example PVC, high density polyethylene, etc.
- a fluid generally a gas
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP02732865A EP1387755A1 (fr) | 2001-05-17 | 2002-05-14 | Dispositif d'injection de fluide propre dans une paraison en matiere plastique |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0106523A FR2824775B1 (fr) | 2001-05-17 | 2001-05-17 | Dispositif d'injection de fluide propre dans une paraison en matiere plastique, et dispositif de soufflage propre d'un recipient en faisant application |
| FR01/06523 | 2001-05-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2002092324A1 true WO2002092324A1 (fr) | 2002-11-21 |
Family
ID=8863398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2002/001613 Ceased WO2002092324A1 (fr) | 2001-05-17 | 2002-05-14 | Dispositif d'injection de fluide propre dans une paraison en matiere plastique |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1387755A1 (fr) |
| FR (1) | FR2824775B1 (fr) |
| WO (1) | WO2002092324A1 (fr) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2255949A1 (fr) * | 2009-05-29 | 2010-12-01 | Krones AG | Souffleuse dotée d'un système de nettoyage CIP pour la fabrication de bouteilles en plastique, et procédé de réalisation correspondant |
| CN106182707A (zh) * | 2016-08-30 | 2016-12-07 | 江苏维达机械有限公司 | 一种注吹用芯棒 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1475911A (fr) * | 1966-02-24 | 1967-04-07 | Unilever Nv | Procédé et dispositif pour la fabrication d'un corps creux en matière thermoplatique et article en résultant |
| US3338998A (en) * | 1964-05-25 | 1967-08-29 | Settembrini Antoine Di | Method of manufacturing hollow thermoplastic articles |
| GB1590612A (en) * | 1977-05-02 | 1981-06-03 | Raffinage Cie Francaise | Method and apparatus for the production by blow-moulding of hollow plastics articles which are closed and sterile |
| JPH08187769A (ja) * | 1995-01-06 | 1996-07-23 | Sekisui Chem Co Ltd | ブロー成形用金型及び中空成形体の製造方法 |
| DE19713874A1 (de) * | 1997-04-04 | 1998-10-08 | Gardena Kress & Kastner Gmbh | Vorrichtung zur Einleitung von Gas in ein Formwerkzeug |
-
2001
- 2001-05-17 FR FR0106523A patent/FR2824775B1/fr not_active Expired - Fee Related
-
2002
- 2002-05-14 EP EP02732865A patent/EP1387755A1/fr not_active Withdrawn
- 2002-05-14 WO PCT/FR2002/001613 patent/WO2002092324A1/fr not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3338998A (en) * | 1964-05-25 | 1967-08-29 | Settembrini Antoine Di | Method of manufacturing hollow thermoplastic articles |
| FR1475911A (fr) * | 1966-02-24 | 1967-04-07 | Unilever Nv | Procédé et dispositif pour la fabrication d'un corps creux en matière thermoplatique et article en résultant |
| GB1590612A (en) * | 1977-05-02 | 1981-06-03 | Raffinage Cie Francaise | Method and apparatus for the production by blow-moulding of hollow plastics articles which are closed and sterile |
| JPH08187769A (ja) * | 1995-01-06 | 1996-07-23 | Sekisui Chem Co Ltd | ブロー成形用金型及び中空成形体の製造方法 |
| DE19713874A1 (de) * | 1997-04-04 | 1998-10-08 | Gardena Kress & Kastner Gmbh | Vorrichtung zur Einleitung von Gas in ein Formwerkzeug |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 1996, no. 11 29 November 1996 (1996-11-29) * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2255949A1 (fr) * | 2009-05-29 | 2010-12-01 | Krones AG | Souffleuse dotée d'un système de nettoyage CIP pour la fabrication de bouteilles en plastique, et procédé de réalisation correspondant |
| JP2010274651A (ja) * | 2009-05-29 | 2010-12-09 | Krones Ag | プラスチックボトル、特にpetボトルを製造するためのcipシステムを有するブロー成形機 |
| TWI383881B (zh) * | 2009-05-29 | 2013-02-01 | Krones Ag | 用於生產塑膠瓶尤其是pet瓶的具有cip系統的吹塑機 |
| US8535037B2 (en) | 2009-05-29 | 2013-09-17 | Krones Ag | Blow molding machine with CIP system for producing plastic bottles, particularly PET bottles |
| US9393331B2 (en) | 2009-05-29 | 2016-07-19 | Krones Ag | Blow molding machine with CIP system for producing plastic bottles, particularly PET bottles |
| CN106182707A (zh) * | 2016-08-30 | 2016-12-07 | 江苏维达机械有限公司 | 一种注吹用芯棒 |
| CN106182707B (zh) * | 2016-08-30 | 2018-04-27 | 江苏维达机械有限公司 | 一种注吹用芯棒 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1387755A1 (fr) | 2004-02-11 |
| FR2824775B1 (fr) | 2003-08-15 |
| FR2824775A1 (fr) | 2002-11-22 |
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