WO2005000560A2 - System for the thermal conditioning of preforms of plastic containers - Google Patents

System for the thermal conditioning of preforms of plastic containers Download PDF

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Publication number
WO2005000560A2
WO2005000560A2 PCT/FR2004/001610 FR2004001610W WO2005000560A2 WO 2005000560 A2 WO2005000560 A2 WO 2005000560A2 FR 2004001610 W FR2004001610 W FR 2004001610W WO 2005000560 A2 WO2005000560 A2 WO 2005000560A2
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WO
WIPO (PCT)
Prior art keywords
preforms
heating
infrared lamps
preform
distribution
Prior art date
Application number
PCT/FR2004/001610
Other languages
French (fr)
Other versions
WO2005000560A3 (en
Inventor
Frédéric HERMIER
Original Assignee
Newtec International Group (Sa)
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Publication date
Application filed by Newtec International Group (Sa) filed Critical Newtec International Group (Sa)
Publication of WO2005000560A2 publication Critical patent/WO2005000560A2/en
Publication of WO2005000560A3 publication Critical patent/WO2005000560A3/en

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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
    • B29C49/68—Ovens specially adapted for heating preforms or parisons
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/0033—Heating devices using lamps
    • H05B3/0038—Heating devices using lamps for industrial applications
    • H05B3/0057—Heating devices using lamps for industrial applications for plastic handling and treatment
    • 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
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0822—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using IR radiation
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
    • 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
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06—Injection blow-moulding
    • 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
    • B29C49/68—Ovens specially adapted for heating preforms or parisons
    • B29C49/682—Ovens specially adapted for heating preforms or parisons characterised by the path, e.g. sinusoidal path
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7158—Bottles
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/032—Heaters specially adapted for heating by radiation heating

Definitions

  • the present invention relates to a thermal conditioning system for preforms of plastic containers.
  • It relates to the production by stretch-blowing from blanks molded mainly by injection, of containers and in particular of bottles made of thermoplastic material, in particular of polyethylene terephthalate (P. ET.).
  • the preforms produced mainly by injection consist of a neck definitively formed upon injection and of a body which, after blowing, will become the body of the bottle and which is in the form of a tube closed at the end. opposite of the pass. Between the neck and the body is a collar, of a diameter greater than that of the body, necessary for the stretch-blow molding operation, so as to maintain the preform in the mold during the operation of transforming the preform in a bottle.
  • the preforms 1 are most often reheated in ovens of linear or circular shape by means of short infrared lamps 2 ′ arranged horizontally in several rows (most often from 7 to 9) and forming lines or lines. almost continuous circles from entry to exit oven, the preforms moving along a path 3 'parallel to the lamps 2' ( Figures 1 and 2).
  • the first phase is carried out uniformly over the height of the body of the preform.
  • the heating time is relatively long because the initial temperature is low (room temperature) and the P.E.T. is partly transparent to short infrared rays and therefore not very receptive to infrared.
  • the P.E.T. being a poor conductor of heat, penetration to the heart takes place slowly and sometimes under intense ventilation of the "external skin". It is considered that this phase corresponds to approximately 50 to 80% of the total heating time.
  • the “distribution” heating consists in modulating the heating intensity on a certain part of the preform so as to create surface temperature gradients longitudinally and possibly circumferentially.
  • Existing ovens have a low energy efficiency, generally between 15 and 25%.
  • the invention aims to reduce the energy consumption necessary for reheating preforms without calling into question current basic techniques such as the use of short infrared lamps, or ventilation of the body and the neck of the preform. It makes it possible to make not only savings on the operating cost thanks to a reduction in the number of short infrared lamps resulting in a saving of electrical energy and reduced maintenance, but also savings in construction, space and installation due to a smaller footprint and electrical installation, as well as a smaller electrical cabinet.
  • the system according to the invention consists of a preform heating furnace comprising a penetration heating zone arranged so that that the preforms follow a sinuous path between short infrared lamps arranged vertically.
  • FIGS. 1 and 2 already mentioned, schematically represent, respectively in perspective and seen at the end, the principle of reheating preforms in existing ovens
  • Figure 3 shows, seen from above, the route of the preforms in systems of this type
  • Figures 4 and 5 show in the same conditions, respectively from above and seen at the end, the principle of reheating preforms according to the invention
  • Figure 6 is a top view of a heating module according to the invention
  • Figure 7 is a vertical section along the arrows F1 of Figure 6
  • Figure 8 schematically shows a device for heater with infrared lamp comprising zones with variable intensity
  • FIG. 9 is a schematic representation showing an example of arrangement of a circular oven applying the system according to the invention tion
  • Figure 10 is an enlargement of detail D1 of Figure 9.
  • the device consists of an oven 4 for reheating preforms comprising a "penetration heating" zone P (FIG. 9) equipped with elongated heating elements constituted by infrared lamps 2 arranged vertically, in which the preforms 1 follow a zigzag path 3 between the said infrared lamps.
  • a "penetration heating" zone P (FIG. 9) equipped with elongated heating elements constituted by infrared lamps 2 arranged vertically, in which the preforms 1 follow a zigzag path 3 between the said infrared lamps.
  • the winding path 3 is obtained by means of fixed guides 5, 6 formed by semi-circular elements and rotary guides 7 with a vertical axis distributed along the path 3, each comprising a series of notches 8 adapted to the body of the preforms 1 and rotating alternately and successively in opposite directions so as to force the preforms to follow the path 3.
  • the infrared lamps 2 can advantageously be staggered along the path in order to increase the angle of exposure of the preforms 1 to infrared radiation.
  • This arrangement ensures a heating efficiency much higher than that of conventional systems because more than three quarters of the radiation perimeter of the infrared lamp 2 is used against just over 25% in the case of horizontal lamps:
  • the “distribution heating” zone can be constituted in a current manner by using horizontal lamps 2 'with medium infrared, of different powers and or spectrum (4 to 6 maximum horizontal lamps).
  • the "distribution heating” zone can use special vertical infrared lamps 9 comprising each several zones 10 of emission intensity and / or variable spectrum obtained either by an irregular distribution of the filament along the lamp, or by modulated transmission screens integrated into the lamp 9 or installed around the latter.
  • the “distribution heating” zone can use vertical infrared lamps 2 associated either with a system of screens or walls, or with a differential ventilation system determined to reduce the temperature of certain zones of the preforms 1. In order to extend the length of the path of the preforms 1 around the vertical infrared lamps 2, 9 as much as possible, the latter may advantageously be staggered along the heating path (FIGS. 9 and 10).
  • FIG. 9 shows a possible arrangement of the “penetration” P and “distribution” R heating zones separated by a stabilization phase S without heating in the case of a preform heating furnace using only vertical infrared lamps 2 , 9.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

The invention relates to a system for the thermal conditioning of preforms of plastic containers. The inventive system comprises a preform heating furnace with a heating penetration zone (P) which is equipped with long heating elements comprising infrared lamps (2) that are disposed in a vertical manner. According to the invention, the preforms (1) move along a winding course with the aid of fixed guides (5, 6) comprising semi-circular elements and rotating guides (7) having vertical axes, which are distributed along the length of the course. Moreover, each of the rotating guides comprises a series of notches which are adapted to the body of the preforms (1) and each guide rotates alternately and successively in opposing directions. The invention also relates to the production of containers by means of stretch-blowing from moulded preforms and, in particular, thermoplastic bottles such as those made from polyethylene terephthalate (PET).

Description

SYSTEME DE CONDITIONNEMENT THERMIQUE DE PREFORMES DE RECIPIENTS EN MATIERE PLASTIQUE THERMAL CONDITIONING SYSTEM FOR PLASTIC CONTAINER PREFORMS
La présente invention a pour objet un système de conditionnement thermique de préformes de récipients en matière plastique.The present invention relates to a thermal conditioning system for preforms of plastic containers.
Il concerne la fabrication par étirage-soufflage à partir d'ébauches moulées principalement par injection, de récipients et en particulier de bouteilles en matière thermoplastique, notamment en polyéthylène téréphtalate (P. ET.).It relates to the production by stretch-blowing from blanks molded mainly by injection, of containers and in particular of bottles made of thermoplastic material, in particular of polyethylene terephthalate (P. ET.).
La fabrication par injection et étirage-soufflage de bouteilles en matière synthétique nécessite deux interventions qui peuvent se dérouler en des lieux distincts. Tout d'abord une ébauche, ou "préforme" de dimension réduite est réalisée, le plus souvent par injection, puis refroidie et stockée. La préforme est ensuite réchauffée à nouveau, à la température de bi-étirage, soit 10 à 20°C au dessus de la température de transition vitreuse, puis amenée à sa forme définitive par soufflage dans un moule approprié. La technique selon l'invention s'applique à ce second procédé et est destinée à alimenter les « souffleuses de bouteilles ».The production by injection and stretch blow molding of plastic bottles requires two operations which can take place in separate locations. First of all, a blank or "preform" of reduced size is produced, most often by injection, then cooled and stored. The preform is then reheated again, to the bi-stretching temperature, ie 10 to 20 ° C above the glass transition temperature, then brought to its final form by blowing in an appropriate mold. The technique according to the invention applies to this second process and is intended to supply the "bottle blowers".
Les préformes produites principalement par injection sont constituées d'un col définitivement formé dès l'injection et d'un corps qui, après soufflage, deviendra le corps de la bouteille et qui se présente sous la forme d'un tube fermé à l'extrémité opposé du col. Entre le col et le corps se trouve une collerette, d'un diamètre supérieur à celui du corps, nécessaire pour l'opération d'étirage-soufflage, de manière à maintenir la préforme dans le moule durant l'opération de transformation de la préforme en bouteille.The preforms produced mainly by injection consist of a neck definitively formed upon injection and of a body which, after blowing, will become the body of the bottle and which is in the form of a tube closed at the end. opposite of the pass. Between the neck and the body is a collar, of a diameter greater than that of the body, necessary for the stretch-blow molding operation, so as to maintain the preform in the mold during the operation of transforming the preform in a bottle.
Dans les installations existantes, les préformes 1 sont le plus souvent réchauffées dans des fours de forme linéaire ou circulaire au moyen de lampes à infrarouge court 2' disposées horizontalement sur plusieurs rangées (le plus souvent de 7 à 9) et formant des lignes ou des cercles quasi continus de l'entrée à la sortie du four, les préformes se déplaçant suivant un parcours 3' parallèle aux lampes 2' (figures 1 et 2).In existing installations, the preforms 1 are most often reheated in ovens of linear or circular shape by means of short infrared lamps 2 ′ arranged horizontally in several rows (most often from 7 to 9) and forming lines or lines. almost continuous circles from entry to exit oven, the preforms moving along a path 3 'parallel to the lamps 2' (Figures 1 and 2).
On peut généralement distinguer deux phases dans le réchauffage : la chauffe dite de «pénétration » et la chauffe de « répartition » , souvent séparées par une phase de stabilisation sans chauffage. La première phase est réalisée de façon homogène sur la hauteur du corps de la préforme. La durée de chauffe est relativement longue car la température initiale est basse (température ambiante) et le P.E.T. est en partie transparent aux rayons infrarouges courts donc peu réceptif aux infrarouges. De plus, le P.E.T. étant mauvais conducteur de la chaleur, la pénétration à coeur s'effectue lentement et quelquefois sous une ventilation intense de la "peau externe". On considère que cette phase correspond à environ 50 à 80% du temps total de réchauffage. La chauffe de « répartition » consiste à moduler l'intensité de chauffe sur certaine partie de la préforme de façon à créer des gradients de température de surface longitudinalement et éventuellement circonférentielement. Les fours existants ont un rendement énergétique faible, généralement situé entre 15 et 25%. L'invention a pour objectif de diminuer la consommation énergétique nécessaire au réchauffage des préformes sans remettre en cause les techniques de base actuelles telles que l'utilisation de lampes à infrarouge court, ou la ventilation du corps et du col de la préforme. Elle permet de réaliser non seulement des gains sur le coût d'exploitation grâce à une diminution du nombre de lampes à infrarouges courts entraînant une économie d'énergie électrique et de maintenance réduite, mais également des gains de construction, d'encombrement et d'installation dus à un encombrement au sol et une installation électrique moins importants, ainsi qu'à une armoire électrique plus petite.We can generally distinguish two phases in the reheating: the so-called “penetration” heating and the “distribution” heating, often separated by a stabilization phase without heating. The first phase is carried out uniformly over the height of the body of the preform. The heating time is relatively long because the initial temperature is low (room temperature) and the P.E.T. is partly transparent to short infrared rays and therefore not very receptive to infrared. In addition, the P.E.T. being a poor conductor of heat, penetration to the heart takes place slowly and sometimes under intense ventilation of the "external skin". It is considered that this phase corresponds to approximately 50 to 80% of the total heating time. The “distribution” heating consists in modulating the heating intensity on a certain part of the preform so as to create surface temperature gradients longitudinally and possibly circumferentially. Existing ovens have a low energy efficiency, generally between 15 and 25%. The invention aims to reduce the energy consumption necessary for reheating preforms without calling into question current basic techniques such as the use of short infrared lamps, or ventilation of the body and the neck of the preform. It makes it possible to make not only savings on the operating cost thanks to a reduction in the number of short infrared lamps resulting in a saving of electrical energy and reduced maintenance, but also savings in construction, space and installation due to a smaller footprint and electrical installation, as well as a smaller electrical cabinet.
Le système selon l'invention est constitué d'un four de réchauffage des préformes comportant une zone de chauffe de pénétration aménagée de manière à ce que les préformes suivent un parcours sinuant entre des lampes à infrarouges courts disposées verticalement.The system according to the invention consists of a preform heating furnace comprising a penetration heating zone arranged so that that the preforms follow a sinuous path between short infrared lamps arranged vertically.
Sur les dessins annexés, donnés à titre d'exemple non limitatif d'une forme de réalisation conforme à la présente demande : les figures 1 et 2, déjà mentionnées, représentent schématiquement, respectivement en perspective et vu en bout, le principe de réchauffage des préformes dans les fours existants, la figure 3 montre, vu de dessus, le parcours des préformes dans les systèmes de ce type, les figures 4 et 5 montrent dans les mêmes conditions, respectivement de dessus et vu en bout, le principe de réchauffage des préformes selon l'invention, la figure 6 est une vue de dessus d'un module de chauffe conforme à l'invention, la figure 7 est une coupe verticale suivant les flèches F1 de la figure 6, la figure 8 représente schématiquement un dispositif de chauffe avec lampe à infrarouge comportant des zones à intensité variable, la figure 9 est une représentation schématique montrant un exemple d'agencement d'un four circulaire appliquant le système selon l'invention et la figure 10 est un agrandissement du détail D1 de la figure 9.In the accompanying drawings, given by way of nonlimiting example of an embodiment in accordance with the present application: FIGS. 1 and 2, already mentioned, schematically represent, respectively in perspective and seen at the end, the principle of reheating preforms in existing ovens, Figure 3 shows, seen from above, the route of the preforms in systems of this type, Figures 4 and 5 show in the same conditions, respectively from above and seen at the end, the principle of reheating preforms according to the invention, Figure 6 is a top view of a heating module according to the invention, Figure 7 is a vertical section along the arrows F1 of Figure 6, Figure 8 schematically shows a device for heater with infrared lamp comprising zones with variable intensity, FIG. 9 is a schematic representation showing an example of arrangement of a circular oven applying the system according to the invention tion and Figure 10 is an enlargement of detail D1 of Figure 9.
Le dispositif, figures 3 à 10, est constitué d'un four 4 de réchauffage des préformes comportant une zone de "chauffe de pénétration" P (figure 9) équipée d'éléments chauffants allongés constitués de lampes à infrarouges 2 disposées verticalement, dans laquelle les préformes 1 suivent un parcours 3 en zigzag entre les dites lampes infrarouges.The device, FIGS. 3 to 10, consists of an oven 4 for reheating preforms comprising a "penetration heating" zone P (FIG. 9) equipped with elongated heating elements constituted by infrared lamps 2 arranged vertically, in which the preforms 1 follow a zigzag path 3 between the said infrared lamps.
Le parcours sinueux 3 est obtenu au moyen de guides fixes 5, 6 formés d'éléments semi-circulaires et de guides rotatifs 7 à axe vertical répartis le long du parcours 3, comportant chacun une série d'encoches 8 adaptés au corps des préformes 1 et tournant alternativement et successivement en sens contraire de manière à forcer les préformes à suivre le parcours 3. Les lampes à infrarouges 2 pourront avantageusement être disposées en quinconce le long du parcours afin d'augmenter l'angle d'exposition des préformes 1 au rayonnement infrarouge. Cette disposition assure un rendement de chauffe très supérieur à celui des systèmes classique car plus des trois quarts du périmètre de rayonnement de la lampe infrarouge 2 est utilisé contre à peine plus de 25% dans le cas de lampes horizontales: De plus, la trajectoire spécifique de la préforme permet de diminuer de façon notoire le nombre de lampes et l'encombrement du four 4 de réchauffage. A titre d'exemple, si l'on considère quatre pas, ou position de préforme dans le four, de 50 mm chacun avec des préformes de 150 mm de longueur, on utilisera dans le cas courant de huit rangs de lampes horizontales : 8 x 4 x 50 = 1600 mm de filament. Avec le système selon l'invention, il suffit de quatre lampes infrarouges de 150 mm, soit : 4 x 150 = 600 mm de ce même filament. Les gains en consommation d'énergie sont donc très importants dans cette phase; sachant que cette phase correspond généralement à plus de 70% du temps total de chauffe, les économies d'énergie seront donc très importantes. De plus, la puissance installée pour une cadence donnée sera inférieure d'environ deux tiers, ce qui se traduira par une économie pour le constructeur mais également pour l'utilisateur du point de vue de son installation électrique. Il en va de même pour la taille réduite du four qui coûtera moins cher en terme de construction et immobilisera moins de surface au sol pour les utilisateurs.The winding path 3 is obtained by means of fixed guides 5, 6 formed by semi-circular elements and rotary guides 7 with a vertical axis distributed along the path 3, each comprising a series of notches 8 adapted to the body of the preforms 1 and rotating alternately and successively in opposite directions so as to force the preforms to follow the path 3. The infrared lamps 2 can advantageously be staggered along the path in order to increase the angle of exposure of the preforms 1 to infrared radiation. This arrangement ensures a heating efficiency much higher than that of conventional systems because more than three quarters of the radiation perimeter of the infrared lamp 2 is used against just over 25% in the case of horizontal lamps: In addition, the specific trajectory of the preform makes it possible to significantly reduce the number of lamps and the size of the reheating oven 4. For example, if we consider four steps, or preform position in the oven, of 50 mm each with preforms of 150 mm in length, we will use in the current case eight rows of horizontal lamps: 8 x 4 x 50 = 1600 mm of filament. With the system according to the invention, four infrared lamps of 150 mm are sufficient, that is: 4 x 150 = 600 mm of this same filament. The gains in energy consumption are therefore very significant in this phase; knowing that this phase generally corresponds to more than 70% of the total heating time, the energy savings will therefore be very significant. In addition, the installed power for a given rate will be about two thirds lower, which will translate into savings for the manufacturer but also for the user from the point of view of its electrical installation. The same goes for the reduced size of the oven which will cost less in terms of construction and immobilize less floor space for users.
Une meilleure répartition et une meilleure homogénéisation périphérique de la chaleur peut être obtenue en provoquant une rotation des préformes 1 sur elle-mêmes (figure 8).A better distribution and a better peripheral homogenization of the heat can be obtained by causing a rotation of the preforms 1 on themselves (FIG. 8).
La zone de "chauffe de répartition" peut être constituée de façon courante en utilisant des lampes horizontales 2' à infrarouges moyens, de puissances et ou de spectre différents (4 à 6 maximum lampes horizontales). Selon une première variante d'exécution, la zone de "chauffe de répartition" peut utiliser des lampes infrarouges verticales spéciales 9 comportant chacune plusieurs zones 10 d'intensité d'émission et/ou de spectre variable obtenues soit par une répartition irrégulière du filament le long de la lampe, soit par des écrans à transmission modulée intégrés à la lampe 9 ou installés autour de celle-ci. Selon une seconde variante d'exécution, la zone de "chauffe de répartition" peut utiliser des lampes infrarouges verticales 2 associées soit à un système d'écrans ou parois, soit à un système de ventilation différentiel déterminés pour diminuer la température de certaines zones des préformes 1. , Afin d'allonger au maximum la longueur de la trajectoire des préformes 1 autour des lampes à infrarouges 2, 9 verticales, ces dernières pourront avantageusement être disposées en quinconce le long du parcours de chauffe (figures 9 et 10).The "distribution heating" zone can be constituted in a current manner by using horizontal lamps 2 'with medium infrared, of different powers and or spectrum (4 to 6 maximum horizontal lamps). According to a first alternative embodiment, the "distribution heating" zone can use special vertical infrared lamps 9 comprising each several zones 10 of emission intensity and / or variable spectrum obtained either by an irregular distribution of the filament along the lamp, or by modulated transmission screens integrated into the lamp 9 or installed around the latter. According to a second alternative embodiment, the “distribution heating” zone can use vertical infrared lamps 2 associated either with a system of screens or walls, or with a differential ventilation system determined to reduce the temperature of certain zones of the preforms 1. In order to extend the length of the path of the preforms 1 around the vertical infrared lamps 2, 9 as much as possible, the latter may advantageously be staggered along the heating path (FIGS. 9 and 10).
La figure 9 montre une disposition possible des zones de chauffe de «pénétration » P et de « répartition » R séparées par une phase de stabilisation S sans chauffage dans le cas d'un four de réchauffage de préformes utilisant uniquement des lampes à infrarouge verticales 2, 9.FIG. 9 shows a possible arrangement of the “penetration” P and “distribution” R heating zones separated by a stabilization phase S without heating in the case of a preform heating furnace using only vertical infrared lamps 2 , 9.
Le choix et le positionnement des divers éléments constitutifs donnent à l'objet de l'invention un maximum d'effets utiles et de performances qui n'avaient pas été, à ce jour, obtenus par des systèmes à infrarouges courts traditionnels. The choice and the positioning of the various constituent elements give the object of the invention a maximum of useful effects and performances which had not, to date, been obtained by traditional short infrared systems.

Claims

REVENDICATIONS 1 ° . Système de conditionnement thermique de préformes de récipients en matière plastique, ayant pour objet la fabrication par étirage-soufflage à partir d'ébauches moulées principalement par injection de récipients et en particulier de bouteilles en matière thermoplastique, notamment en polyéthylène téréphtalate ("P.E.T."), caractérisé en ce que est constitué d'un four (4) de réchauffage comportant une zone de "chauffe de pénétration" (P) agencée de manière à ce que les préformes (1) suivent un parcours (3) sinuant entre des éléments chauffants allongés constitués de lampes à infrarouges courts (2) disposées verticalement, le parcours sinueux étant obtenu au moyen de guides fixes (5, 6) formés d'éléments semi-circulaires et de guides rotatifs (7) à axe vertical répartis le long dudit parcours, pourvus chacun d'une série d'encoches (8) adaptées au corps des préformes (1) et tournant alternativement et successivement en sens contraire de manière à forcer les préformes à suivre le parcours (3). 2°. Système de chauffage de préformes selon la revendication 1 , se caractérisant par le fait qu'il est équipé d'un moyen provoquant une rotation des préformes (1) sur elle-mêmes, de manière à obtenir une meilleure répartition et une meilleure homogénéisation périphérique de la chaleur. 3°. Système de chauffage de préformes selon l'une quelconque des revendications précédentes, se caractérisant par le fait que la zone de "chauffe de répartition" est équipée de lampes infrarouges horizontales (2') de puissances et/ou de spectre différents. 4°. Système de chauffage de préformes selon l'une quelconque des revendications 1 et 2, se caractérisant par le fait que la zone de "chauffe de répartition" est équipée de lampes infrarouges (2) verticales associées à un système de ventilation différentiel déterminé pour diminuer la température de certaines zones des préformes (1).1 ° CLAIMS. System for thermal conditioning of preforms of plastic containers, having as their object the manufacture by stretch-blow molding from blanks molded mainly by injection of containers and in particular bottles of thermoplastic material, in particular polyethylene terephthalate ("PET") , characterized in that it consists of a reheating oven (4) comprising a "penetration heating" zone (P) arranged so that the preforms (1) follow a winding path (3) between heating elements elongated consisting of short infrared lamps (2) arranged vertically, the sinuous path being obtained by means of fixed guides (5, 6) formed of semicircular elements and rotary guides (7) with vertical axis distributed along said path , each provided with a series of notches (8) adapted to the body of the preforms (1) and rotating alternately and successively in opposite directions so as to force the preforms to follow the route (3). 2 °. Preform heating system according to claim 1, characterized in that it is equipped with means causing rotation of the preforms (1) on themselves, so as to obtain a better distribution and a better peripheral homogenization of the heat. 3 °. Preform heating system according to any one of the preceding claims, characterized in that the "distribution heating" zone is equipped with horizontal infrared lamps (2 ') of different powers and / or spectrum. 4 °. Preform heating system according to any one of claims 1 and 2, characterized in that the "distribution heating" zone is equipped with vertical infrared lamps (2) associated with a ventilation system differential determined to decrease the temperature of certain areas of the preforms (1).
5°. Système de chauffage de préformes selon l'une quelconque des revendications 1 et 2, se caractérisant par le fait que la zone de "chauffe de répartition" est équipée de lampes infrarouges (2) verticales associées à un système d'écrans ou parois déterminés pour diminuer la température de certaines zones des préformes (1).5 °. Preform heating system according to any one of claims 1 and 2, characterized in that the "distribution heating" zone is equipped with vertical infrared lamps (2) associated with a system of screens or walls determined for decrease the temperature of certain areas of the preforms (1).
60 Système de chauffage de préformes selon l'une quelconque des revendications 1 et 2, se caractérisant par le fait que la zone de "chauffe de répartition" est équipée de lampes infrarouges verticales spéciales (9) comportant chacune plusieurs zones (10) d'intensité et/ou de spectre d'émission variable.60 Preform heating system according to any one of claims 1 and 2, characterized in that the "distribution heating" zone is equipped with special vertical infrared lamps (9) each comprising several zones (10) of intensity and / or variable emission spectrum.
7°. Système de chauffage de préformes selon la revendication 6, se caractérisant par le fait que les zones (10) d'intensité d'émission variable sont obtenues par une répartition irrégulière du filament le long de la lampe (9).7 °. Preform heating system according to claim 6, characterized in that the zones (10) of variable emission intensity are obtained by an irregular distribution of the filament along the lamp (9).
80 Système de chauffage de préformes selon la revendication 6, se caractérisant par le fait que les zones (10) d'intensité et/ou de spectre d'émission variable sont obtenues au moyen d'écrans à transmission modulée intégrés à la lampe (9) ou installés autour de celle-ci.80 preform heating system according to claim 6, characterized in that the zones (10) of variable intensity and / or emission spectrum are obtained by means of modulated transmission screens integrated into the lamp (9 ) or installed around it.
90 Système de chauffage de préformes selon l'une quelconque des revendications précédentes, se caractérisant par le fait que les lampes à infrarouges (2, 9) verticales sont disposées en quinconce le long du parcours de chauffe de manière à allonger au maximum la longueur de la trajectoire des préformes (1) autour des dites lampes. 90 preform heating system according to any one of the preceding claims, characterized in that the vertical infrared lamps (2, 9) are staggered along the heating path so as to lengthen the length of the the trajectory of the preforms (1) around said lamps.
PCT/FR2004/001610 2003-06-25 2004-06-25 System for the thermal conditioning of preforms of plastic containers WO2005000560A2 (en)

Applications Claiming Priority (2)

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FR03/07663 2003-06-25
FR0307663A FR2856626A1 (en) 2003-06-25 2003-06-25 SYSTEM FOR THERMALLY CONDITIONING PREFORM OF CONTAINERS IN PLASTIC MATERIAL

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WO2005000560A3 WO2005000560A3 (en) 2005-03-10

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RU2695514C1 (en) * 2018-10-12 2019-07-23 Акционерное общество "Военно-промышленная корпорация "Научно-производственное объединение машиностроения" Test bench for load tests of aircraft compartment

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CN100408314C (en) * 2005-01-21 2008-08-06 昌盛达机械(浙江)有限公司 Energy-saving heating device for plastic tube blank
CN100408313C (en) * 2005-01-21 2008-08-06 昌盛达机械(浙江)有限公司 Full-automatic hollow container forming machine
FR2915418A1 (en) * 2007-04-25 2008-10-31 Sidel Participations METHOD OF HEATING REELIES FOR THE MANUFACTURE OF CONTAINERS
WO2008132603A1 (en) 2007-04-25 2008-11-06 Sidel Participations Method of heating preforms for the manufacture of containers, and heater device
CN101668624B (en) * 2007-04-25 2014-03-19 西德尔合作公司 Method of heating preforms for the manufacture of containers, and heater device
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DE202008005252U1 (en) 2008-04-17 2008-07-10 Krones Ag Lamp device and heating section for heating preforms for the production of containers
EP2110225A1 (en) 2008-04-17 2009-10-21 Krones AG Lamp device and heat strip for heating pre-forms in the creation of containers
RU2583845C1 (en) * 2015-02-12 2016-05-10 Акционерное общество "Военно-промышленная корпорация "Научно-производственное объединение машиностроения" (АО "ВПК "НПО машиностроения") Heater for bench for thermal and ratio tests of radioparent fairings
RU2695514C1 (en) * 2018-10-12 2019-07-23 Акционерное общество "Военно-промышленная корпорация "Научно-производственное объединение машиностроения" Test bench for load tests of aircraft compartment

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