WO2004024346A2 - Process and device for treating the coating of thermoplastic resin containers - Google Patents

Process and device for treating the coating of thermoplastic resin containers Download PDF

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Publication number
WO2004024346A2
WO2004024346A2 PCT/EP2003/010040 EP0310040W WO2004024346A2 WO 2004024346 A2 WO2004024346 A2 WO 2004024346A2 EP 0310040 W EP0310040 W EP 0310040W WO 2004024346 A2 WO2004024346 A2 WO 2004024346A2
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WO
WIPO (PCT)
Prior art keywords
bottles
area
furnace
airflow
heating elements
Prior art date
Application number
PCT/EP2003/010040
Other languages
French (fr)
Other versions
WO2004024346A3 (en
Inventor
Matteo Zoppas
Alberto Armellin
Andrea Saran
Ottorino Vendramelli
Original Assignee
S.I.P.A. Societa' Industrializzazione Progettazione E Automazione S.P.A.
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 S.I.P.A. Societa' Industrializzazione Progettazione E Automazione S.P.A. filed Critical S.I.P.A. Societa' Industrializzazione Progettazione E Automazione S.P.A.
Priority to JP2004535470A priority Critical patent/JP2006502838A/en
Priority to CA2498238A priority patent/CA2498238C/en
Priority to DE60313889T priority patent/DE60313889T2/en
Priority to BRPI0314018-0A priority patent/BR0314018B1/en
Priority to US10/527,225 priority patent/US7926197B2/en
Priority to AU2003270162A priority patent/AU2003270162A1/en
Priority to EP03750506A priority patent/EP1578541B1/en
Publication of WO2004024346A2 publication Critical patent/WO2004024346A2/en
Publication of WO2004024346A3 publication Critical patent/WO2004024346A3/en
Priority to US13/089,022 priority patent/US8221851B2/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
    • F26B3/283—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun in combination with convection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0209—Multistage baking
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
    • F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
    • F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined

Definitions

  • This invention relates to a process, and the relating device, for treating the coating of containers. More particularly, it relates to a process, and the relating device, for drying protective coatings on containers, especially bottles made of thermoplastic resin.
  • thermoplastic materials such as PET (polyethylene terephthalate)
  • PET polyethylene terephthalate
  • bottles which happen to be the most spread.
  • Bottles made of thermoplastic materials are definitely convenient in terms of weight, resistance to impact, cost, and similar but also have some drawbacks.
  • said materials are somewhat microporous making, along with the limited thickness of the wall, the bottle permeable to gas.
  • oxygen may penetrate into the bottle modifying the contents through oxidation, and/or carbon dioxide found in many carbonated drinks may escape making the drink less fizzy and attractive.
  • patent US-A-5.658.619 describes a process for coating bottles. This process involves sending bottles to a coating segment where the bottles are gripped and dipped one at a time in one of many containers filled with a coating solution consisting of a resin dispersed in a solvent. Then, after removing the bottles from the coating solution, the bottles are released and sent to a flash-off segment where the solvent of the coating solution is removed from the coating applied to the outer surface of the bottle. After the flash-off process, the bottles are sent to a reticulation station where the resin of the coating is reticulated.
  • a reticulation station where the resin of the coating is reticulated.
  • a simple way of drying said water-based paints is to heat them; for example, by exposing them to infrared radiation (IR).
  • IR infrared radiation
  • an infrared-heating plant is described, for example, in patent application PCT/EP00/10540, of this Applicant, although it refers to a plant for conditioning pre-moulded workpieces to be sent to final moulding, meaning that it is used to raise the temperature of said workpieces to one suitable for final moulding.
  • the pre-moulds are conveyed past a series of IR lamps; at the same time, an adjustable airflow at ambient temperature flows, first, around the pre-moulds and, then, around the IR lamps to cool them.
  • This invention refers to a process whereby bottles, which are made of thermoplastic material and held by their aperture by means of evenly distributed specific gripping devices, are dipped into a resin solution in a solvent, which is later evaporated through the flash-off method, in order to place a protective layer on the outer surface of the bottles.
  • the drying process described in this invention comprises the following steps: i. Feeding the coated bottles, after removing the excess resin solution employing a known method, through a first area of the treatment furnace located under spaced out heating elements; ii. Allowing air to flow from outside the treatment furnace into said first area of the furnace; specifically, the air must flow upward, first, around the bottles and, then, around said heating elements; iii.
  • the bottles are positioned horizontally.
  • the above process is further characterized by the fact that the radiation emitted upward by the heating elements is reflected on the bottles by means of a reflecting device.
  • This reflecting device also lets the airflow that flowed past the heating elements into said second area; in fact, the device is suitably perforated uniformly on 10-30 % of its surface (preferably, 15-25%).
  • the heating elements have an elongated shape and many infrared lamps (IR), preferably arranged in several distinct clusters. The major axis of these heating elements is positioned horizontally.
  • the temperature of the airflow that brushes against the bottles being fed under the heating elements ranges from 50 to 70 °C, and the speed of the airflow flowing around the bottles is between 1 ,5 and 2,5 m/s; these parameters are controlled so that the temperature of the bottles passing beneath the heating elements is never greater than 65 °C.
  • the airflow which has been warmed up (to reach a temperature approximately between 60 and 80 °C) by the heating elements, flows (at a speed ranging from 1 ,5 to 2,5 m/s) around the already treated bottles in the second area of the furnace above the heating elements so that the temperature of the bottles does not exceed 65 °C.
  • the relevant parameters are all adjusted so that 75 to 95% of the solvent (ideally 85 to 92%) is removed from the coating through infrared heating in the first area of the furnace, while the remaining amount of solvent is removed through hot air in the second area of the furnace.
  • the hot air coming from the first area of the furnace is utilized again in order to remove any residual solvent from the coating in the second area of the furnace, minimizing wasted energy.
  • the air flowing out of said second area is sent back, at least partially, to the first area of the furnace; thus, not only does this further conserve energy but it also helps maintain the desired temperature in said first and second areas of the furnace, promoting excellent process steadiness regardless of ambient temperature.
  • part of the cold air drawn from outside the furnace is diverted, before entering the first area of the furnace, in order to maintain the neck of the bottles at a temperature of 55 °C at most.
  • the bottles are kept in the horizontal position throughout the drying process, and, at least in the infrared furnace, the bottles rotate at a speed between 100 and 300 revolutions per minute.
  • the infrared lamps are of the medium wave type; the time the bottles take to pass in front of the lamps is included between 15 and 30 sec, preferably 25 sec.
  • a particular embodiment of the invention shall be described below. This version is given as a nonlimiting example of the scope and scale of the invention, and in conjunction with the following accompanying drawings:
  • Figure 1 shows a vertical cross section of a first embodiment of the plant
  • Figure 2 shows a vertical cross section of a second embodiment of the plant.
  • Figure 1 shows the basic cell of the plant in accordance with the invention.
  • Known means (not shown in the figures) suitable to create a flow of ambient air (6) and to control the flow rate; iv.
  • the bottles (4) enter the furnace (2') near the lamps in a specific position (position 4"), move through the entire furnace in said position, exit the furnace, move upward, and are placed in a specific position (4'").
  • an airflow (6) which is created and controlled by devices not shown in the figure, flows from the chamber (12) into the lower area (2) through a duct (19). Once the airflow reaches said area, it is divided by a wall (14) into two parts: a first airflow goes through a wall (11 ) in order to enter the furnace (2'), control the temperature of the bottles, and cool the devices that emit thermal radiation or heating elements
  • the first part of the airflow after cooling the heating elements (3), goes through a wall (10) and flows upward to the upper part of the chamber (1) where it brushes against the bottles in position 4'", finishing off the paint-drying process, and then flows into the escape chamber (16).
  • the hot airflow is at least partially sent back into chamber 12 through a door (7) in order to regenerate heat and keep the temperature of the furnace (2') constant. If there is not enough space lengthwise to handle the required output, instead of the in-line layout, the two segments of the plant can be placed side by side (see
  • the bottles move along the following path (refer to drawing): starting on the right-hand side, the bottles enter the chamber (1 ) in position 4", travel through the furnace (2') in the direction of the viewer, turn left to enter furnace 2'a on the left part of the plant moving away from the viewer; now, they move upward in position 4"'a, travel across the upper area (5a) of the left part of the plant moving toward the viewer again, turn right, and finally enter in position 4'" in part 5 that they travel across moving away from the viewer toward the exit of the drying plant.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Drying Of Solid Materials (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)
  • Manufacturing Optical Record Carriers (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
  • Laminated Bodies (AREA)

Abstract

A process and device for drying the coating of containers made of thermoplastic material. The process involves feeding said containers through a furnace divided into two areas: in the first, most of the solvent of the coating is removed by heating the paint with infrared lamps, while the temperature of the containers is controlled through an airflow; in the second, the remaining solvent is removed using said airflow coming from the first area of the furnace.

Description

PROCESS AND DEVICE FOR TREATING THE COATING OF THERMOPLASTIC RESIN CONTAINERS
Technical Field
This invention relates to a process, and the relating device, for treating the coating of containers. More particularly, it relates to a process, and the relating device, for drying protective coatings on containers, especially bottles made of thermoplastic resin.
Background Art Thermoplastic materials, such as PET (polyethylene terephthalate), have been used for some time now to make containers. This is particularly true for food- containing containers, especially drinks. Although said containers can be of different types, they shall be referred to hereinafter generically as bottles, which happen to be the most spread. Bottles made of thermoplastic materials are definitely convenient in terms of weight, resistance to impact, cost, and similar but also have some drawbacks. For example, said materials are somewhat microporous making, along with the limited thickness of the wall, the bottle permeable to gas. For example, oxygen may penetrate into the bottle modifying the contents through oxidation, and/or carbon dioxide found in many carbonated drinks may escape making the drink less fizzy and attractive.
Many solutions have been put forward to resolve these problems. Firstly, one solution involves increasing the thickness of the bottle wall; unfortunately, this increases production costs and can lead to problems during manufacturing. Secondly, one solution involves using multilayer bottles; however, this increases production costs and complexity. Thirdly, another solution entails depositing a thin layer to act as barrier on the internal wall of the bottles; unfortunately, this also increases costs and complexity.
An apparently simple and effective solution exists to the problem of creating a protective coating capable of acting as barrier to gas exchanges: painting, especially through dipping, the external surface of the bottles.
For example, patent US-A-5.658.619 describes a process for coating bottles. This process involves sending bottles to a coating segment where the bottles are gripped and dipped one at a time in one of many containers filled with a coating solution consisting of a resin dispersed in a solvent. Then, after removing the bottles from the coating solution, the bottles are released and sent to a flash-off segment where the solvent of the coating solution is removed from the coating applied to the outer surface of the bottle. After the flash-off process, the bottles are sent to a reticulation station where the resin of the coating is reticulated. Such a plant is complex and has a few critical points, especially regarding the formation of paint sagging in the detearing phase, during the transfer from the painting station to the flash-off station. Furthermore, eliminating the solvent found in the paint through simple flash-off is a long process that is not well controlled. Sometimes paints with a water-based solvent are used to reduce costs and limit environmental pollution. Unfortunately, this option hampers drying, requiring long drying times or heating of the bottles at a temperature apt to promote the quick elimination of the solvent. If high outputs are required, said temperature ,is very near to, if not greater than, the temperature for softening the thermoplastic material of the bottles.
Hence, it is very important to provide a paint-drying system that limits any damage to the bottles and, at the same time, assures treatment methods and limited drying times, after painting, that prevent irregularities in the thickness of the coating. A simple way of drying said water-based paints is to heat them; for example, by exposing them to infrared radiation (IR).
An infrared-heating plant is described, for example, in patent application PCT/EP00/10540, of this Applicant, although it refers to a plant for conditioning pre-moulded workpieces to be sent to final moulding, meaning that it is used to raise the temperature of said workpieces to one suitable for final moulding. In the aforementioned document, the pre-moulds are conveyed past a series of IR lamps; at the same time, an adjustable airflow at ambient temperature flows, first, around the pre-moulds and, then, around the IR lamps to cool them. Although this solution is appealing, it concerns non-painted pre-moulds, which must simply be heated at an established temperature using different handling methods and short heating times. Objects of the Invention It is an object of this invention to provide a process for drying perfectly a protective layer placed on containers, especially bottles, made of thermoplastic material in order to decrease the permeability of the bottle to gas, which could affect the quality of the contents of the bottle if gas seeps into or out of the bottle. It is another object of the invention to provide a process for drying the protective layer placed on containers, especially bottles, made of thermoplastic material without overheating the thermoplastic material, which could distort the bottles, and wasting energy.
It is an additional object of the invention to provide a plant for carrying out the aforementioned process.
These and other advantages of the invention shall be readily apparent from the detailed description of the currently preferred embodiments of the invention, given as nonlimiting examples that do not exclude further embodiments and improvements. Description of the Invention
This invention refers to a process whereby bottles, which are made of thermoplastic material and held by their aperture by means of evenly distributed specific gripping devices, are dipped into a resin solution in a solvent, which is later evaporated through the flash-off method, in order to place a protective layer on the outer surface of the bottles. The drying process described in this invention comprises the following steps: i. Feeding the coated bottles, after removing the excess resin solution employing a known method, through a first area of the treatment furnace located under spaced out heating elements; ii. Allowing air to flow from outside the treatment furnace into said first area of the furnace; specifically, the air must flow upward, first, around the bottles and, then, around said heating elements; iii. Sending said bottles, after feeding them under the heating elements, into a second area of the furnace, which is located above said heating elements; iv. Allowing the airflow, which has already flown around said heating elements, to flow around the bottles in said second area; v. Mixing at least part of the hot airflow flowing out of said second area with air obtained from outside before sending a refreshed airflow to said first area of the furnace.
Inside the drying furnace, both in the first and second areas, the bottles are positioned horizontally. The above process is further characterized by the fact that the radiation emitted upward by the heating elements is reflected on the bottles by means of a reflecting device. This reflecting device also lets the airflow that flowed past the heating elements into said second area; in fact, the device is suitably perforated uniformly on 10-30 % of its surface (preferably, 15-25%). The heating elements have an elongated shape and many infrared lamps (IR), preferably arranged in several distinct clusters. The major axis of these heating elements is positioned horizontally.
The temperature of the airflow that brushes against the bottles being fed under the heating elements ranges from 50 to 70 °C, and the speed of the airflow flowing around the bottles is between 1 ,5 and 2,5 m/s; these parameters are controlled so that the temperature of the bottles passing beneath the heating elements is never greater than 65 °C.
Then, the airflow, which has been warmed up (to reach a temperature approximately between 60 and 80 °C) by the heating elements, flows (at a speed ranging from 1 ,5 to 2,5 m/s) around the already treated bottles in the second area of the furnace above the heating elements so that the temperature of the bottles does not exceed 65 °C.
The relevant parameters (power emitted by the lamps, airflow, bottle treatment time, and air circulation % in the furnace) are all adjusted so that 75 to 95% of the solvent (ideally 85 to 92%) is removed from the coating through infrared heating in the first area of the furnace, while the remaining amount of solvent is removed through hot air in the second area of the furnace.
In this manner, i.e. by removing only part of the solvent from the coating in the first area of the furnace, it is possible to control very well the temperature of the bottles under the heating elements, minimizing distortions of the bottle wall and resin crystallization.
As was already mentioned, the hot air coming from the first area of the furnace is utilized again in order to remove any residual solvent from the coating in the second area of the furnace, minimizing wasted energy. Furthermore, the air flowing out of said second area is sent back, at least partially, to the first area of the furnace; thus, not only does this further conserve energy but it also helps maintain the desired temperature in said first and second areas of the furnace, promoting excellent process steadiness regardless of ambient temperature. In addition, part of the cold air drawn from outside the furnace is diverted, before entering the first area of the furnace, in order to maintain the neck of the bottles at a temperature of 55 °C at most. The bottles are kept in the horizontal position throughout the drying process, and, at least in the infrared furnace, the bottles rotate at a speed between 100 and 300 revolutions per minute.
The infrared lamps are of the medium wave type; the time the bottles take to pass in front of the lamps is included between 15 and 30 sec, preferably 25 sec. A particular embodiment of the invention shall be described below. This version is given as a nonlimiting example of the scope and scale of the invention, and in conjunction with the following accompanying drawings:
• Figure 1 shows a vertical cross section of a first embodiment of the plant;
• Figure 2 shows a vertical cross section of a second embodiment of the plant. Figure 1 shows the basic cell of the plant in accordance with the invention.
It consists of a chamber (1) delimited by walls (8,15, 17, and 18), comprising the following elements: i. A first lower area (2) for treating bottles (4), and a second upper area (5) for treating bottles ii. A furnace (2') found inside the lower area (2) equipped with heating elements (3) (for example, infrared lamps) suitable to emit thermal radiation; this furnace is delimited by a wall (14), part of the outer wall (17), an upper wall (10), and a lower wall (11) - both suitable to reflect the thermal radiation and allow gas to flow through; iii. Known means (not shown in the figures) suitable to create a flow of ambient air (6) and to control the flow rate; iv. A chamber (12) suitable to receive said airflow (6); this chamber is delimited by walls (8, 15) and by a door (7) communicating with a vertical duct (19), which is delimited by a wall (8) and an element (9) that in turn communicates with said lower area (2); v. A chain having many gripping devices (13) that grip and hold the bottles, the so-called chucks, in the furnace (2'); said chain passes outside the furnace parallel to a wall (14) equipped with an opening apt to enable the passage of the neck of the bottles, making it possible to keep the neck of the bottles outside the furnace (2') and divide the airflow (6).
During the process, the bottles (4) enter the furnace (2') near the lamps in a specific position (position 4"), move through the entire furnace in said position, exit the furnace, move upward, and are placed in a specific position (4'"). Meanwhile, an airflow (6), which is created and controlled by devices not shown in the figure, flows from the chamber (12) into the lower area (2) through a duct (19). Once the airflow reaches said area, it is divided by a wall (14) into two parts: a first airflow goes through a wall (11 ) in order to enter the furnace (2'), control the temperature of the bottles, and cool the devices that emit thermal radiation or heating elements
(3); a second airflow flows upward in order to exit the furnace (2') brushing against a wall (14) in order to keep the neck of the bottles (4) held in the chucks (13) cool.
The first part of the airflow, after cooling the heating elements (3), goes through a wall (10) and flows upward to the upper part of the chamber (1) where it brushes against the bottles in position 4'", finishing off the paint-drying process, and then flows into the escape chamber (16). In this chamber, the hot airflow is at least partially sent back into chamber 12 through a door (7) in order to regenerate heat and keep the temperature of the furnace (2') constant. If there is not enough space lengthwise to handle the required output, instead of the in-line layout, the two segments of the plant can be placed side by side (see
Figure 2 where all the parts are numbered exactly like in Figure 1 ). In this version of the invention, the bottles move along the following path (refer to drawing): starting on the right-hand side, the bottles enter the chamber (1 ) in position 4", travel through the furnace (2') in the direction of the viewer, turn left to enter furnace 2'a on the left part of the plant moving away from the viewer; now, they move upward in position 4"'a, travel across the upper area (5a) of the left part of the plant moving toward the viewer again, turn right, and finally enter in position 4'" in part 5 that they travel across moving away from the viewer toward the exit of the drying plant.

Claims

1. A process for treating the coating of bottles made of thermoplastic material coming from a plant where each bottle is held by its aperture by means of evenly distributed specific gripping devices moved by a conveyor chain, dipped into a resin solution in a solvent in order to create a protective and impermeable-to-gas layer on the outer surface of the bottle, excess paint is appropriately removed, and said solvent is evaporated, the drying process characterised by the following steps: i. Feeding the bottles through a first area (2') of the treatment furnace located under spaced out heating elements; ii. Providing an air flow from outside the treatment furnace into said first area
(2') of the furnace directed upwardly, first, around the bottles and, then, around said heating elements; iii. Sending said bottles, after feeding them under the heating elements, into a second area of the furnace, which is located above said heating elements; iv. Allowing the airflow, which has already flown around said heating elements, to flow around the bottles in said second area; v. Mixing at least part of the hot airflow flowing out of said second area with air obtained from outside before sending a refreshed airflow to said first area of the furnace.
2. A process as claimed in claim 1 wherein said heating elements consist of many infrared lamps (IR) of the medium wave type.
3. A process as claimed in claim 2 wherein said infrared lamps are arranged in several distinct clusters.
4. A process as claimed in claim 1 wherein the temperature of said airflow in said first area (2') ranges from 50 to 70°C, while the speed of the airflow around the bottles is included between 1 ,5 and 2,5 m/min.
5. A process as claimed in claim 4 wherein said parameters are controlled by fittingly modifying the flow rate of the airflow coming from outside the plant and the amount of hot air coming from said second area, which is mixed with said airflow.
6. A process as claimed in claim 1 wherein said airflow, which passing around the heating elements has reached a temperature between 60°C and 80°C, meets, at a speed included between 1 ,5 and 2,5 m/s, in the second area of the furnace above the heating elements, the previously treated bottles and keeps them at a temperature lower than 65°C.
7. A process as claimed in claim 1 wherein power emitted by the lamps, airflow, bottle treatment time, and air circulation % in the furnace are all adjusted so that 75 to 95% of the solvent is removed from the coating in the first area of the furnace, while the remaining amount of solvent is removed in the second area of the furnace.
8. A process as claimed in claim 7 wherein the amount of solvent removed from the coating is included between 85 and 92%.
9. A process as claimed in claim 2 wherein the hot airflow exiting said second area after having completely dried the coating is recycled in the furnace of an amount comprised between 0 and 90%.
10. A process as claimed in claim 5 wherein the amount of time the bottles stay in front of the lamps is included between 15 and 30 sec.
1 1.A process as claimed in claim 5 wherein the amount of time the bottles stay in front of the lamps equals 25 sec.
12. A device for treating the coating of bottles made of thermoplastic material in accordance with the process described in claim 1 consisting of a chamber (1 ), delimited by walls (8,15, 17, 18), comprising the following elements: i. A first lower area (2) for treating bottles (4), and a second upper area (5) for treating bottles; ii. A furnace (2') placed inside the lower area (2) equipped with heating elements (3) suitable to emit thermal radiation; this furnace is delimited by a wall (14), part of the outer wall (17), an upper wall (10), and a lower wall (11 ) - both suitable to reflect the thermal radiation and allow gas to flow through; iii. Means suitable to create a flow of ambient air (6) and to control the flow rate; iv. A chamber (12) suitable to receive said airflow (6); delimited by walls (8, 15) and by a door (7) communicating with a vertical duct (19), which is delimited by a wall (8) and an element (9) that in turn communicates with said lower area (2) to permit air flow from the chamber (12) to said area
(2); v. A chain having a plurality of chucks (13) that grip and hold the bottles in the furnace (2') when in proximity of the furnace and passing outside of it parallely to the wall (14) provided with an opening adapted to allow the passage of the neck of the bottles, making it possible to keep the neck of the bottles outside the furnace (2') and to divide the airflow (6).
13. A device as claimed in claim 12 wherein the door (7) separates the inlet chamber (12) of the air from an outlet chamber (16) from which the air, after passing from the lower area (2) to the upper area (5) and being heated by the heating elements (3), flows out of the chamber, said door (7) being adapted to be operated to inlet part of the hot air flowing out of the outlet chamber (16) into the inlet chamber (12).
14. A device as claimed in claim 12 wherein said wall (14) also serves to deflect part of the airflow coming from the duct (19) to area (2) to send it to the chucks (13) to cool the neck of the bottles.
PCT/EP2003/010040 2002-09-10 2003-09-10 Process and device for treating the coating of thermoplastic resin containers WO2004024346A2 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP2004535470A JP2006502838A (en) 2002-09-10 2003-09-10 Method and apparatus for processing a coating on a thermoplastic container
CA2498238A CA2498238C (en) 2002-09-10 2003-09-10 Process and device for treating the coating of thermoplastic resin containers
DE60313889T DE60313889T2 (en) 2002-09-10 2003-09-10 METHOD AND DEVICE FOR TREATING PLASTIC TANK COATINGS
BRPI0314018-0A BR0314018B1 (en) 2002-09-10 2003-09-10 process and device for coating treatment of containers made of thermoplastic resin.
US10/527,225 US7926197B2 (en) 2002-09-10 2003-09-10 Process and device for treating the coating of thermoplastic resin containers
AU2003270162A AU2003270162A1 (en) 2002-09-10 2003-09-10 Process and device for treating the coating of thermoplastic resin containers
EP03750506A EP1578541B1 (en) 2002-09-10 2003-09-10 Process and device for treating the coating of thermoplastic resin containers
US13/089,022 US8221851B2 (en) 2002-09-10 2011-04-18 Process and device for treating the coating of thermoplastic resin containers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000452A ITRM20020452A1 (en) 2002-09-10 2002-09-10 PROCEDURE AND DEVICE FOR THE TREATMENT OF COATINGS
ITRM02A000452 2002-09-10

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US10527225 A-371-Of-International 2003-09-10
US13/089,022 Division US8221851B2 (en) 2002-09-10 2011-04-18 Process and device for treating the coating of thermoplastic resin containers

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Publication Number Publication Date
WO2004024346A2 true WO2004024346A2 (en) 2004-03-25
WO2004024346A3 WO2004024346A3 (en) 2005-08-25

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Cited By (7)

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EP1488858A2 (en) * 2003-06-14 2004-12-22 Fritz Hockemeyer Process for convective treatment of plastic materials
EP1488858A3 (en) * 2003-06-14 2005-03-09 Fritz Hockemeyer Process for convective treatment of plastic materials
US7700029B2 (en) 2004-03-02 2010-04-20 S.I.P.A. Societa Industrializzazione Progettazione E Automazione S.P.A. Device and method for conditioning plastic objects
US7678304B2 (en) 2004-03-30 2010-03-16 S.I.P.A. Societa Industrializzazione Progettazione E. Automazione S.P.A. Apparatus for blow moulding of plastic objects
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ES2286456T3 (en) 2007-12-01
CN1681606A (en) 2005-10-12
US7926197B2 (en) 2011-04-19
DE60313889D1 (en) 2007-06-28
ITRM20020452A1 (en) 2004-03-11
JP2006502838A (en) 2006-01-26
CN1323767C (en) 2007-07-04
BR0314018A (en) 2005-07-19
EP1578541B1 (en) 2007-05-16
US8221851B2 (en) 2012-07-17
ITRM20020452A0 (en) 2002-09-10
AU2003270162A1 (en) 2004-04-30
CA2498238A1 (en) 2004-03-25
CA2498238C (en) 2012-06-26
WO2004024346A3 (en) 2005-08-25
RU2005106206A (en) 2005-08-27
RU2319555C2 (en) 2008-03-20
US20110262658A1 (en) 2011-10-27
DE60313889T2 (en) 2008-02-14
BR0314018B1 (en) 2012-05-29
US20060040063A1 (en) 2006-02-23
AU2003270162A8 (en) 2004-04-30
ATE362403T1 (en) 2007-06-15
EP1578541A3 (en) 2005-10-12

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