CA1062095A - Method of spray coating the external surface of a bottle - Google Patents
Method of spray coating the external surface of a bottleInfo
- Publication number
- CA1062095A CA1062095A CA226,855A CA226855A CA1062095A CA 1062095 A CA1062095 A CA 1062095A CA 226855 A CA226855 A CA 226855A CA 1062095 A CA1062095 A CA 1062095A
- Authority
- CA
- Canada
- Prior art keywords
- bottle
- spray
- coating
- coated
- nozzle
- 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.)
- Expired
Links
Classifications
-
- 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
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
- B05B13/0442—Installation or apparatus for applying liquid or other fluent material to separate articles rotated during spraying operation
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
Landscapes
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Surface Treatment Of Glass (AREA)
- Paints Or Removers (AREA)
- Nozzles (AREA)
- Details Of Rigid Or Semi-Rigid Containers (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A method for spray-coating the surface of a bottle or the like which comprises spraying a liquid coating onto the side surface of the bottle or the like from a spray nozzle or a plurality of juxtaposed spray nozzles positioned a short distance from the bottle while rotating the bottle around the long axis of the bottle, moving the nozzle or nozzles, the bottle, or the nozzle or nozzles and the bottle relative to each other such that the movement is along the long axis of the bottle whereby a ribbon-like spray-coated zone or zones in a helical shape are formed, the spray-coated zone or zones contacting each other or partially overlapping each other, and then spray-coated the bottom surface of the bottle by orienting the bottle, the spray nozzle or nozzles, or the bottle and the spray nozzle or nozzles such that the spray strikes the bottom surface of the bottle.
A method for spray-coating the surface of a bottle or the like which comprises spraying a liquid coating onto the side surface of the bottle or the like from a spray nozzle or a plurality of juxtaposed spray nozzles positioned a short distance from the bottle while rotating the bottle around the long axis of the bottle, moving the nozzle or nozzles, the bottle, or the nozzle or nozzles and the bottle relative to each other such that the movement is along the long axis of the bottle whereby a ribbon-like spray-coated zone or zones in a helical shape are formed, the spray-coated zone or zones contacting each other or partially overlapping each other, and then spray-coated the bottom surface of the bottle by orienting the bottle, the spray nozzle or nozzles, or the bottle and the spray nozzle or nozzles such that the spray strikes the bottom surface of the bottle.
Description
~()6'~0~5 BACKGROUND OF THE INVENTION
1. Field of the Invention ~-~
This invention relates to a method for coating the -~urfaae of a bottle or a cylindrical article. It is particularly effective for the coating of high viscosity liquid coatings such as paints, and is suitable for use in coating the surfaces of bottles for beer, carbonated beverages, alcoholic liquors and foods, and other articles of a cylindrical or like shape.
1. Field of the Invention ~-~
This invention relates to a method for coating the -~urfaae of a bottle or a cylindrical article. It is particularly effective for the coating of high viscosity liquid coatings such as paints, and is suitable for use in coating the surfaces of bottles for beer, carbonated beverages, alcoholic liquors and foods, and other articles of a cylindrical or like shape.
2. Description of the Prior Art ., Losses of liquid coatings as a result of scattering generally occurs in spray coating. Particularly in the coating of articles having narrow coating surfaces such as bottles, a large amount of the liquid coating is scattered away and does not ; -come into contact with the surfaces to be coated. This, o course, gives rise to loss of liquid coating, inefficiency, surface areas possibly not coated and great economical disadvantages.
SUMMARY OF THE INVENTION
The present invention was accomplished as a result of inve~tigations made in an attempt to remove these defects.
According to this invention, spraying is carried out at a short distance from the surface to be coated so that the range of spray-coating a liquid coating will not fall outside the surface to be coated, and this brings about a reduction in the losses of the liquid coating. Since the area to be spray-coated is small, the surface to be coated is moved to form a ribbon-like coated zone. By moving the spray nozzle or bottle or both the nozzle and the bottle or using a number of spray nozzles similarly, the ribbon-like coated zone or zones are formed in a helical shape, in contact with each other or in a partly overlapping manner, thereby to coat the surface.
-1- ~
10~095 ~ ~
1 Thus, the present invention provides a method for spray-coating the surface of bottles or the like which comprises spraying a liquid coating onto the side surface of the bottle or the like from a spray nozzle or a plurality of juxtaposed spray nozzle~ positioned a short distance from the bottle while rotating the bottle around the long axis of the bottle, moving the nozzle or nozzles, the bottle, or the nozzle or nozzle~ and the bottle relative to each other such that the movement is along the long axis of the bottle whereby a ribbon-like spray-coated zone or zones in a helical shape are formed, the spray-coated zone or zones contacting each other or partially overlapping each other,and then spray-coated the bottom surface of the bottle ' by orienting the bottle, the spray nozzle or nozzles, or the bottle and the spray nozzle or nozzles such that the spray ;
stri~e~ the bottom ~urface of the bottle.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 shows an example of an apparatus for use in coating the entire surface including the bottom of a glass bottle in accordance with this invention.
Figure 2 shows an example of an apparatus for coating the side surface of a glass bottle in accordance with the present invention.
Figure 3 shows an example of an apparatus for coating the cylindrical article by using a number of juxtaposed spray nozzles in accordance with the invention.
DETAILED DESCRIPTION OF THE INVENTION
The present invention is especially effective for liquid coatings having a high viscosity of, e.g., about 10,000 to 500,000 cps,such as paints. This means that liquid coatings 106~0~5 1 which do not produce a wide spraying area because of their high viscosity can also be applied by the method of this invention.
~igh viscosity liquid coatings can be spray-coated if their viscosity is reduced by heating, e.g, to about 50C. Furthermore, when a gas heated, e.g., such a~ air or an inert gas, at about 50 to 250C i9 used for spraying, the time required to heat the paint can be markedly shortened. If such a heated gas is used concurrently in the present invention, reactive high viscosity liquid coatings which tend to react by heating can be easily spray-coated. A suitable pressure range which can be employed in the spray coating is about 3 to 5 kg/cm . Thus, according to the present invention, the range of spray-coatable viscosities, e.g, as high as about 500,000 cps, and the range of components that can be incorporated in the liquid coating can be broadened.
Thi~ is in contrast to conventional methods in which difficulties occur in spray coating of liquid coatings having a viscosity of only as high as about 10,000 cps. Further, this permits the use of reactive liquid coatings and high viscosity liquid coatings which do not contain toxic solvents, and is effective not only for reducing the losses of liquid coating by spraying but also for controlling pollution and maintaining a clean environment.
Suitable liquid coatings which can be effectively coated in the invention include, but are not to be construed as being limited to, polyurethane coatings ~non-solvent type) (either one-package type or two-package type), epoxy-polyamide-type coatings (non-solvent type), etc.
One specific procedure for coating a bottle or the like by the present invention involves moving a spray nozzle, whose orifice can be of any conventional size and shape, along the long axis of the bottle or the like at a short distance from the surface to be coated. Desirably, the distance between the nozzle and ,, . . . - : .
106~)95 1 the surface to be coated is adjusted suitably according to the shape or size of the portion to be coated. In the case of coating hottles, it is desirable to move the nozzle while changing the distance between the nozzle and the surface to be coated according to the diameter or shape, etc., of the bottle at a position on its long axis. Alternatively, if desired, the bottle can be moved with respect to the spray nozzle or both the nozzle and the bottle can be moved with respect to each other.
In any of the embodiments suitably used in the present invention the relative movement is along the long axis of the bottle.
The bottom surface of the bottle can be coated by -directing the nozzle toward the bottom surface at a position beyond the bottom of the bottle. Furthermore, two or more spray nozzles can be used, and the position, spraying conditions and moving range of each of the nozzles can be determined according to the shape, size, etc., of the position of the bottle. Instead of forming the coated zone in a helical shape by moving the nozzle, the bottle or both, a number of spray nozzles can be disposed along the long axis of the bottle, thus maintaining the coated zbnes in contact with each other in juxtaposition or in a partly overlapping manner. Again, if desired, a similar relative movement of the bottle with respect to the spray nozzles as described above can be employed. It is also possible to fix a spray nozzle for coating the bottom of the bottle at a suitable position near the bottle in a manner such that the spray from the nozzle is directed toward the bottom surface of the bottle.
It is to be further emphasized that the method of this invention is applicable to both regularly shaped cylindrical articles to be coated and irregularly shaped cylindrical articles to be coated and that the spray nozzle and the cylindrical article 1~)6i~0~S
1 can be moved relative to each other by moving either or both so that the distance between the spray nozzle and the article surface at any point along the article surface and the spray area are maintained substantially constant. Particularly where the surface of the article is irregularly shaped, it is simpler and preferred to maintain the article in a stationary position while rotating the article about its long axis and moving the spray nozzle along the bottle surface in the direction of the long axis and at the same time following the contour of the article ~urface along the long axis so as to maintain the spray distance and spray area covered substantially constant. Similarly, where a plurality of spray nozzles is employed and they are positioned along the cylindrical article surface the same techniques can be employed, of course, with-appropriate modifications in relative movement being made since more of the article surface is being spray-coated at the same time because of the use of more than one spray nozzle. Further, where a plurality of spray nozzles are used, they can be positioned and spaced such that the contour of the article surface and the spray area resulting -is taken into consideration.
As described hereinbefore, a conventionally sized and shaped nozzle or nozzles are used in this invention. Therefore, when the liquid coating of this invention is sprayed on the surface of a bottle at a gas pressure of about 3 to 5 kg/cm2, a suitable range of the distance of the spray nozzle(s) from the surface of the bottle is about 2 to 10 cm. That is, since, in - general, an oval sprayed shape is generated on the bottle surface, the spray angles to the surface are about 30 and about 60 with respect to the short axis of the oval and to the long axis of the oval, respectively, it is necessary to spray the liquid coating at a distance of 3.7 cm or less and 14 cm or less in narrow . . . .
.
106~095 1 portions of the bottle or cylindrical article to be coated (e.g., a diameter: 2.5 cm) and in the broader portions of the bottle or cylindrical article to be coated (e.g., a diameter: 7.5 cm), respectively, and in practice, the liquid coating is preferably ~prayed onto the surface of the bottle at a distance of 3 cm and 6 to 10 cm in the narrow and broad portions, respectively.
Apparatuses for performing the present invention are illustrated by the accompanying drawings. Figure 1 shows an example of an apparatus for use in coating the entire surface (including the bottom surface) of a glass bottle using a two-package high viscosity liquid coating. Figure 2 shows an example ;
of an apparatus for coating the side surface of a glass bottle.
Figure 3 shows an example of an apparatus for coating a cylindri-cal article by using a number of spray nozzles disposed in juxtaposition; and in Figure 1, reerence numeral 1 represents a glass bottle; 2 and 2', a spray nozzle; 3, a tank for stirring a liquid coating: 4, a heating device for the spray gas; 5 and 5', a reservoir for a two-package liquid coating; 6 and 6', a metering pump for the liquid coating; 7 and 7', the moving path of the spray nozzle; and 8, a device for maintaining and rotating the bottle. In Figures 2 and 3, reference numeral 1 represents an article to be spray-coated; 2, a spray nozzle; 3, a liquid coating inlet of the spray nozzle; and 4, a spray gas inlet of the spray nozzle.
The following Examples are given to specifically illustrate the method of this invention.
-Using an apparatus of the type shown in Figure 1, the entire surface of a beer bottle was spray-coated in the following manner with a reactive-curable two-package coating (IM-178 ENAMEL, ^ - -1(~ii~095 ~
1 trademark for a product of Toyo Ink Mfg. Co., Ltd.; viscosity, #4 Ford cup, 4 seconds). The beer bottle was held by a holding member 8, and the bottle was rotated at a speed of 60 revolutions per minute. The coatings were supplied in predetermined propor~
tions to a mixing-stirring tank 3 from reservoirs 5 and 5' by means of metering pumps 6 and 6^. The mixture was fed to spray nozzles 2 and 2', and sprayed using air heated at 150C in an air-heating device 4. The spray nozzles 2 and 2' were moved at a rate of 3 cm/sec through the paths shown by 7 and 7'. The -liquid coating was sprayed at a distance of 2 to 5 cm from the surface of the bottle. The edge areas of the ribbon-like coated zones, each with a width of about 2 to 5 cm, were caused to ~ -partly overlap in a helical shape, and the side surface of the bottle was thus coated. The spray nozzle-Q were directed at the posi~ion 7' toward the bottom surface of the bottle, as shown at 2'. After the coating, the coated bottle was heated at 120~C
for 20 minutes to cure the coating.
As shown in Figure 2, a glass bottle 1 with a capacity of 633 ~ was maintained transversely horizontal or longitudinally vertical, and rotated at a rate of 60 revolutions per minute.
A reactive one-package urethane coating (SLN-7, trademark for a product of Toyo Ink Mfg. Co., Ltd.; viscosity 100,000 cps at 25C) was placed in a pressure tank. The tank was connected to a spray gun 2(W-61~0, a trade name of Iwata Tosoki Kogyo Kabushiki Kaisha), and using air 4 heated at 150C, the paint was spray-coated on the bottle at a blow pressure of 3.5 kg/cm2.
The distance between the side surface of the glass bottle and the spray nozzle was 3 cm, and the rate of the movement of the nozzle parallel to the bottle axis was 3 cm/sec. After the .
~)6'~)95 1 coating,the bottle was maintained horizontal ~ if the bottle is maintained vertical at the time of coating, the bottle is then turned horizontal) and baked in an oven at 220C for 12 minutes while rotating the bottle. A coated bottle having a coating with a thickness of 200 microns was obtained.
A tin can, 70 mm in diameter and 120 mm length was coated with a reactive-curable two-package mixed liquid coating ~IM-178 ENAMEL, trademark for a product of Toyo Ink Mfg. Co., Ltd.; viscosity, #4 Ford cup, 20 seconds) using the same spray gun as described in Example 2 at a blow pressure of 3.~ kg/cm2 using air at room temperature (i.e., 20~-30C). After the coating, the coated tin can was baked at 120& for 20 minutes to form a coating having a thickness of about 50 microns.
A~ shown in Figure 3, a glass tube 1 with a diameter of 60 mm and a length of 1300 mm was maintained horizontal, and while the glass tube was rotated at a speed of 30 revolutions per minute, the glass tube was coated with a solvent-type urethane resin coating (IX-060 CLEAR, trademark for a product of Toyo Ink Mfg. Co., Ltd.; viscosity, #4 Ford cup, 20 seconds) by spraying at a blow pressure of 3 kg/cm2 from spray nozzles 2 disposed at intervals of 5 cm ~ATOMIZING NOZZLE JBC, trademark for a product sold by Empire Trading Co., Ltd,) using air at room temperature.
The coated glass tube was dried at 120C for 30 minutes to form a coating having a thickness of 50 microns.
While the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof.
' " :- ' ' '
SUMMARY OF THE INVENTION
The present invention was accomplished as a result of inve~tigations made in an attempt to remove these defects.
According to this invention, spraying is carried out at a short distance from the surface to be coated so that the range of spray-coating a liquid coating will not fall outside the surface to be coated, and this brings about a reduction in the losses of the liquid coating. Since the area to be spray-coated is small, the surface to be coated is moved to form a ribbon-like coated zone. By moving the spray nozzle or bottle or both the nozzle and the bottle or using a number of spray nozzles similarly, the ribbon-like coated zone or zones are formed in a helical shape, in contact with each other or in a partly overlapping manner, thereby to coat the surface.
-1- ~
10~095 ~ ~
1 Thus, the present invention provides a method for spray-coating the surface of bottles or the like which comprises spraying a liquid coating onto the side surface of the bottle or the like from a spray nozzle or a plurality of juxtaposed spray nozzle~ positioned a short distance from the bottle while rotating the bottle around the long axis of the bottle, moving the nozzle or nozzles, the bottle, or the nozzle or nozzle~ and the bottle relative to each other such that the movement is along the long axis of the bottle whereby a ribbon-like spray-coated zone or zones in a helical shape are formed, the spray-coated zone or zones contacting each other or partially overlapping each other,and then spray-coated the bottom surface of the bottle ' by orienting the bottle, the spray nozzle or nozzles, or the bottle and the spray nozzle or nozzles such that the spray ;
stri~e~ the bottom ~urface of the bottle.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 shows an example of an apparatus for use in coating the entire surface including the bottom of a glass bottle in accordance with this invention.
Figure 2 shows an example of an apparatus for coating the side surface of a glass bottle in accordance with the present invention.
Figure 3 shows an example of an apparatus for coating the cylindrical article by using a number of juxtaposed spray nozzles in accordance with the invention.
DETAILED DESCRIPTION OF THE INVENTION
The present invention is especially effective for liquid coatings having a high viscosity of, e.g., about 10,000 to 500,000 cps,such as paints. This means that liquid coatings 106~0~5 1 which do not produce a wide spraying area because of their high viscosity can also be applied by the method of this invention.
~igh viscosity liquid coatings can be spray-coated if their viscosity is reduced by heating, e.g, to about 50C. Furthermore, when a gas heated, e.g., such a~ air or an inert gas, at about 50 to 250C i9 used for spraying, the time required to heat the paint can be markedly shortened. If such a heated gas is used concurrently in the present invention, reactive high viscosity liquid coatings which tend to react by heating can be easily spray-coated. A suitable pressure range which can be employed in the spray coating is about 3 to 5 kg/cm . Thus, according to the present invention, the range of spray-coatable viscosities, e.g, as high as about 500,000 cps, and the range of components that can be incorporated in the liquid coating can be broadened.
Thi~ is in contrast to conventional methods in which difficulties occur in spray coating of liquid coatings having a viscosity of only as high as about 10,000 cps. Further, this permits the use of reactive liquid coatings and high viscosity liquid coatings which do not contain toxic solvents, and is effective not only for reducing the losses of liquid coating by spraying but also for controlling pollution and maintaining a clean environment.
Suitable liquid coatings which can be effectively coated in the invention include, but are not to be construed as being limited to, polyurethane coatings ~non-solvent type) (either one-package type or two-package type), epoxy-polyamide-type coatings (non-solvent type), etc.
One specific procedure for coating a bottle or the like by the present invention involves moving a spray nozzle, whose orifice can be of any conventional size and shape, along the long axis of the bottle or the like at a short distance from the surface to be coated. Desirably, the distance between the nozzle and ,, . . . - : .
106~)95 1 the surface to be coated is adjusted suitably according to the shape or size of the portion to be coated. In the case of coating hottles, it is desirable to move the nozzle while changing the distance between the nozzle and the surface to be coated according to the diameter or shape, etc., of the bottle at a position on its long axis. Alternatively, if desired, the bottle can be moved with respect to the spray nozzle or both the nozzle and the bottle can be moved with respect to each other.
In any of the embodiments suitably used in the present invention the relative movement is along the long axis of the bottle.
The bottom surface of the bottle can be coated by -directing the nozzle toward the bottom surface at a position beyond the bottom of the bottle. Furthermore, two or more spray nozzles can be used, and the position, spraying conditions and moving range of each of the nozzles can be determined according to the shape, size, etc., of the position of the bottle. Instead of forming the coated zone in a helical shape by moving the nozzle, the bottle or both, a number of spray nozzles can be disposed along the long axis of the bottle, thus maintaining the coated zbnes in contact with each other in juxtaposition or in a partly overlapping manner. Again, if desired, a similar relative movement of the bottle with respect to the spray nozzles as described above can be employed. It is also possible to fix a spray nozzle for coating the bottom of the bottle at a suitable position near the bottle in a manner such that the spray from the nozzle is directed toward the bottom surface of the bottle.
It is to be further emphasized that the method of this invention is applicable to both regularly shaped cylindrical articles to be coated and irregularly shaped cylindrical articles to be coated and that the spray nozzle and the cylindrical article 1~)6i~0~S
1 can be moved relative to each other by moving either or both so that the distance between the spray nozzle and the article surface at any point along the article surface and the spray area are maintained substantially constant. Particularly where the surface of the article is irregularly shaped, it is simpler and preferred to maintain the article in a stationary position while rotating the article about its long axis and moving the spray nozzle along the bottle surface in the direction of the long axis and at the same time following the contour of the article ~urface along the long axis so as to maintain the spray distance and spray area covered substantially constant. Similarly, where a plurality of spray nozzles is employed and they are positioned along the cylindrical article surface the same techniques can be employed, of course, with-appropriate modifications in relative movement being made since more of the article surface is being spray-coated at the same time because of the use of more than one spray nozzle. Further, where a plurality of spray nozzles are used, they can be positioned and spaced such that the contour of the article surface and the spray area resulting -is taken into consideration.
As described hereinbefore, a conventionally sized and shaped nozzle or nozzles are used in this invention. Therefore, when the liquid coating of this invention is sprayed on the surface of a bottle at a gas pressure of about 3 to 5 kg/cm2, a suitable range of the distance of the spray nozzle(s) from the surface of the bottle is about 2 to 10 cm. That is, since, in - general, an oval sprayed shape is generated on the bottle surface, the spray angles to the surface are about 30 and about 60 with respect to the short axis of the oval and to the long axis of the oval, respectively, it is necessary to spray the liquid coating at a distance of 3.7 cm or less and 14 cm or less in narrow . . . .
.
106~095 1 portions of the bottle or cylindrical article to be coated (e.g., a diameter: 2.5 cm) and in the broader portions of the bottle or cylindrical article to be coated (e.g., a diameter: 7.5 cm), respectively, and in practice, the liquid coating is preferably ~prayed onto the surface of the bottle at a distance of 3 cm and 6 to 10 cm in the narrow and broad portions, respectively.
Apparatuses for performing the present invention are illustrated by the accompanying drawings. Figure 1 shows an example of an apparatus for use in coating the entire surface (including the bottom surface) of a glass bottle using a two-package high viscosity liquid coating. Figure 2 shows an example ;
of an apparatus for coating the side surface of a glass bottle.
Figure 3 shows an example of an apparatus for coating a cylindri-cal article by using a number of spray nozzles disposed in juxtaposition; and in Figure 1, reerence numeral 1 represents a glass bottle; 2 and 2', a spray nozzle; 3, a tank for stirring a liquid coating: 4, a heating device for the spray gas; 5 and 5', a reservoir for a two-package liquid coating; 6 and 6', a metering pump for the liquid coating; 7 and 7', the moving path of the spray nozzle; and 8, a device for maintaining and rotating the bottle. In Figures 2 and 3, reference numeral 1 represents an article to be spray-coated; 2, a spray nozzle; 3, a liquid coating inlet of the spray nozzle; and 4, a spray gas inlet of the spray nozzle.
The following Examples are given to specifically illustrate the method of this invention.
-Using an apparatus of the type shown in Figure 1, the entire surface of a beer bottle was spray-coated in the following manner with a reactive-curable two-package coating (IM-178 ENAMEL, ^ - -1(~ii~095 ~
1 trademark for a product of Toyo Ink Mfg. Co., Ltd.; viscosity, #4 Ford cup, 4 seconds). The beer bottle was held by a holding member 8, and the bottle was rotated at a speed of 60 revolutions per minute. The coatings were supplied in predetermined propor~
tions to a mixing-stirring tank 3 from reservoirs 5 and 5' by means of metering pumps 6 and 6^. The mixture was fed to spray nozzles 2 and 2', and sprayed using air heated at 150C in an air-heating device 4. The spray nozzles 2 and 2' were moved at a rate of 3 cm/sec through the paths shown by 7 and 7'. The -liquid coating was sprayed at a distance of 2 to 5 cm from the surface of the bottle. The edge areas of the ribbon-like coated zones, each with a width of about 2 to 5 cm, were caused to ~ -partly overlap in a helical shape, and the side surface of the bottle was thus coated. The spray nozzle-Q were directed at the posi~ion 7' toward the bottom surface of the bottle, as shown at 2'. After the coating, the coated bottle was heated at 120~C
for 20 minutes to cure the coating.
As shown in Figure 2, a glass bottle 1 with a capacity of 633 ~ was maintained transversely horizontal or longitudinally vertical, and rotated at a rate of 60 revolutions per minute.
A reactive one-package urethane coating (SLN-7, trademark for a product of Toyo Ink Mfg. Co., Ltd.; viscosity 100,000 cps at 25C) was placed in a pressure tank. The tank was connected to a spray gun 2(W-61~0, a trade name of Iwata Tosoki Kogyo Kabushiki Kaisha), and using air 4 heated at 150C, the paint was spray-coated on the bottle at a blow pressure of 3.5 kg/cm2.
The distance between the side surface of the glass bottle and the spray nozzle was 3 cm, and the rate of the movement of the nozzle parallel to the bottle axis was 3 cm/sec. After the .
~)6'~)95 1 coating,the bottle was maintained horizontal ~ if the bottle is maintained vertical at the time of coating, the bottle is then turned horizontal) and baked in an oven at 220C for 12 minutes while rotating the bottle. A coated bottle having a coating with a thickness of 200 microns was obtained.
A tin can, 70 mm in diameter and 120 mm length was coated with a reactive-curable two-package mixed liquid coating ~IM-178 ENAMEL, trademark for a product of Toyo Ink Mfg. Co., Ltd.; viscosity, #4 Ford cup, 20 seconds) using the same spray gun as described in Example 2 at a blow pressure of 3.~ kg/cm2 using air at room temperature (i.e., 20~-30C). After the coating, the coated tin can was baked at 120& for 20 minutes to form a coating having a thickness of about 50 microns.
A~ shown in Figure 3, a glass tube 1 with a diameter of 60 mm and a length of 1300 mm was maintained horizontal, and while the glass tube was rotated at a speed of 30 revolutions per minute, the glass tube was coated with a solvent-type urethane resin coating (IX-060 CLEAR, trademark for a product of Toyo Ink Mfg. Co., Ltd.; viscosity, #4 Ford cup, 20 seconds) by spraying at a blow pressure of 3 kg/cm2 from spray nozzles 2 disposed at intervals of 5 cm ~ATOMIZING NOZZLE JBC, trademark for a product sold by Empire Trading Co., Ltd,) using air at room temperature.
The coated glass tube was dried at 120C for 30 minutes to form a coating having a thickness of 50 microns.
While the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof.
' " :- ' ' '
Claims (8)
1. A method for spray-coating the outer surface of a bot-tle having a long axis, which comprises spraying a high vis-cosity liquid coating onto a bottle from at least one spray nozzle positioned at a distance of about 2 to 10 cm from the surface to be coated while rotating the bottle around the long axis of the bottle, the sprayed liquid having a viscosity of about 10,000 to 500,000 cps, moving the spray nozzle along the long axis of the bottle so as to form helical shaped rib-bon-like coated zones in a partially overlapping manner and thus to coat the surface of the bottle.
2. The method of claim 1, wherein the spray-coating is effected while moving a spray nozzle along the long axis of the bottle, such that the resulting ribbon-like coated zone is arranged in a helical shape and the succeeding zone contacts the preceding zone thereby to cover the surface of the bottle or cylindrical article.
3. The method of claim 1, wherein the spray-coating is effected with a plurality of juxtaposed spray nozzles disposed along the long axis of the bottle, such that the resulting ribbon-like coated zones contact each other thereby to cover the surface of the bottle.
4. The method of claim 1, further including spraying the liquid coating onto the bottom surface of the bottle by direct-ing the spray nozzle or nozzles toward the bottom surface and at a position such that substantially all the spray area generated contacts the bottom surface.
5. The method of claim 4, wherein the spray-coating is effected by moving the spray nozzle or nozzles along the long axis of the bottle from the neck of the bottle toward the bottom of the bottle so as to form the ribbon-like coated zones in a partially overlapping manner and thus to coat the side surface of the bottle; moving the nozzle or nozzles beyond the bottom of the bottle and then directing the spraying direction of the nozzle toward the bottom surface of the bottle.
6. The method of claim 4, wherein the spray-coating is effected by a plurality of juxtaposed spray nozzles disposed along the long axis of the bottle so as to form juxtaposed ribbon-like coated zones in a partially overlapping manner, and by an additional spray nozzle directed toward the bottom surface of the bottle.
7. The method of claim 1 wherein said spray-coating is carried out by spraying said coating using a heated gas.
8. The method of claim 7, wherein said heated gas is at a temperature of about 50 to 250°C.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP49052825A JPS50144736A (en) | 1974-05-14 | 1974-05-14 | |
| JP50031143A JPS51106144A (en) | 1975-03-17 | 1975-03-17 | Garasubintono hyomennotosohoho |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1062095A true CA1062095A (en) | 1979-09-11 |
Family
ID=26369596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA226,855A Expired CA1062095A (en) | 1974-05-14 | 1975-05-13 | Method of spray coating the external surface of a bottle |
Country Status (5)
| Country | Link |
|---|---|
| CA (1) | CA1062095A (en) |
| DD (1) | DD117995A5 (en) |
| DE (1) | DE2520741C3 (en) |
| FR (1) | FR2270954B1 (en) |
| GB (1) | GB1504337A (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4092953A (en) * | 1976-12-09 | 1978-06-06 | The D. L. Auld Company | Apparatus for coating glass containers |
| US4094778A (en) * | 1977-06-27 | 1978-06-13 | Union Carbide Corporation | Sequestering of CA++ and MG++ in aqueous media using zeolite mixtures |
| DE2824403C2 (en) * | 1978-06-03 | 1983-07-14 | Veba-Glas Ag, 4300 Essen | Process for coating objects, in particular glass bottles |
| FR2443864A1 (en) * | 1978-12-12 | 1980-07-11 | Emballage Ste Gle Pour | Glass bottle treatment - by spraying with aerosol of polyethylene glycol mono:stearate |
| DE3140486C2 (en) * | 1981-10-12 | 1986-03-06 | Jagenberg AG, 4000 Düsseldorf | Device for coating objects such as bottles with plastic |
| FR2563973A1 (en) * | 1984-05-10 | 1985-11-15 | Giraud Abel | Method and device for packaging food products, in particular fish |
| DE3703870A1 (en) * | 1987-02-07 | 1988-08-18 | Merck Patent Gmbh | DEVICE FOR SPRAY COATING OF VESSEL MUFFLES |
| FR2681044B1 (en) * | 1991-09-05 | 1994-03-04 | Gerard Montet | SUPPORT MEANS FOR TRANSPORTING PARTS OF REVOLUTION TO BE TREATED BY SPRAYING A JET OF TREATMENT PRODUCT, WITH RELATIVE RELATIVE MOVEMENT BETWEEN THE SUPPORT MEANS AND THE JET. |
| CH687742A5 (en) * | 1992-05-20 | 1997-02-14 | Lonza Ag Gampel Wallis Geschof | Method and apparatus for applying a coating to a body having a cylindrical surface. |
| NL1003749C2 (en) * | 1996-08-06 | 1998-02-12 | Zuivelonderneming De Vijfheere | Process for spraying protective layers on cheese |
| AU760768B2 (en) * | 1998-06-18 | 2003-05-22 | Amcor Packaging (Australia) Pty Ltd | Method and apparatus for coating bottles |
| AUPP417398A0 (en) * | 1998-06-18 | 1998-07-09 | Containers Pty Ltd | Method and apparatus for coating bottles |
| DE10004403A1 (en) | 2000-02-02 | 2001-08-16 | Schmalbach Lubeca | Method for coating bottom of cans with fluid coating uses spray head to spray coating first with one angle of spray axis onto outer section and then with second axis onto further inner radial area of can bottom |
| CN107961928A (en) * | 2017-12-25 | 2018-04-27 | 无锡特恒科技有限公司 | A kind of oiling station |
-
1975
- 1975-05-06 GB GB1890675A patent/GB1504337A/en not_active Expired
- 1975-05-09 DE DE19752520741 patent/DE2520741C3/en not_active Expired
- 1975-05-13 FR FR7514857A patent/FR2270954B1/fr not_active Expired
- 1975-05-13 CA CA226,855A patent/CA1062095A/en not_active Expired
- 1975-05-14 DD DD18603175A patent/DD117995A5/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| AU8106075A (en) | 1976-11-18 |
| GB1504337A (en) | 1978-03-22 |
| DE2520741A1 (en) | 1975-11-27 |
| DD117995A5 (en) | 1976-02-12 |
| FR2270954A1 (en) | 1975-12-12 |
| DE2520741C3 (en) | 1979-12-06 |
| FR2270954B1 (en) | 1978-11-03 |
| DE2520741B2 (en) | 1979-04-19 |
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