JPWO2021091897A5

JPWO2021091897A5 -

Info

Publication number: JPWO2021091897A5
Application number: JP2022524085A
Authority: JP
Publication date: 2023-11-06

Claims

An ultraviolet bottom coating system,
a conveyor mechanism configured to machine-directly route a plurality of cans having a bottom surface and an uncured coating material applied to the bottom surface;
at least one ultraviolet light emitting diode configured to irradiate ultraviolet light toward the plurality of cans to cure the uncured coating material onto the bottom surface , and including a cooling fluid inlet port and a cooling fluid outlet port; (UV-LED) device,
a cooling fluid supply source that flows cooling fluid to the at least one UV-LED device by communicating with the cooling fluid inlet port and the cooling fluid outlet port of the at least one UV-LED device. .

The system of claim 1, wherein the cooling fluid includes air or water .

The conveyor mechanism includes a work surface having a width dimension perpendicular to a machine direction, and the at least one UV-LED device is oriented to irradiate the ultraviolet light over the entire length of the work surface at the width dimension. , the system of claim 1.

The ultraviolet light directed toward the conveyor mechanism defines a curing zone on the conveyor mechanism, and the conveyor mechanism is configured to route the plurality of cans in a machine direction through the curing zone. 2. The system of claim 1, wherein:

2. The UV-LED device of claim 1, wherein the at least one UV-LED device is configured to irradiate the ultraviolet light having only a defined wavelength within the range of about 200 nm to about 400 nm towards the plurality of cans. system.

The system of claim 1, wherein the at least one UV-LED device is configured to have an activation time to maximum power of less than about 1 second.

2. The system of claim 1, wherein the at least one UV-LED device is configured to emit the ultraviolet light at a power determined within a range of about 2 W/cm ² to about 24 W/cm ² .

a coating applicator configured to define a coating zone on the conveyor mechanism and apply the uncured coating material to the bottom surfaces of the plurality of cans routed through the coating zone; , the system of claim 1 .

9. The system of claim 8, wherein the cooling fluid includes air or water .

the at least one UV-LED device is configured to have an activation time of less than about 1 second;
the system further includes a controller in communication with the conveyor mechanism and the at least one UV-LED device;
The controller selectively activates and deactivates the at least one UV-LED device and controls the routing speed of the conveyor mechanism based on the activation time of the at least one UV-LED device. 9. The system of claim 8, configured to.

9. The system of claim 8, wherein the coating applicator includes a roller configured to contact the bottom surface of the plurality of cans routed through the coating zone.

The conveyor mechanism includes a work surface having a width dimension perpendicular to a machine direction, and the at least one UV-LED device is oriented to irradiate the ultraviolet light over the entire length of the work surface at the width dimension. 9. The system of claim 8.

9. The UV-LED device of claim 8, wherein the at least one UV-LED device is configured to irradiate the ultraviolet light having only a defined wavelength within the range of about 200 nm to about 400 nm towards the plurality of cans. system.

9. The system of claim 8, wherein the at least one UV-LED device is configured to activate to full power in less than about 1 second.

A method for forming a rim coat on the bottom of a metal can, the method comprising:
routing the plurality of cans in a machine direction through a coating zone and then through a curing zone;
applying an uncured coating material to the bottom surface of a plurality of cans passing through the coating zone;
forming the rim coat by curing the uncured coating material onto the bottom surface from at least one ultraviolet light emitting diode (UV-LED) device to the plurality of cans routed through the curing zone; applying ultraviolet light configured to
The cooling fluid is supplied to at least one of the UV-LED devices such that the cooling fluid is supplied through a cooling fluid supply that communicates with a cooling fluid inlet port and a cooling fluid outlet port of the at least one UV-LED device. and a method of flushing .

16. The method of claim 15, wherein the cooling fluid comprises air or water .

16. The method of claim 15, wherein the step of applying ultraviolet radiation includes selectively activating and deactivating the UV-LED devices based on the proximity of the plurality of cans to the curing zone. Method.

at least one of the UV-LED devices is configured to have an activation time to full power of less than about 1 second;
The plurality of cans are arranged in a plurality of groups spaced apart from each other in the machine direction,
17. The method of claim 16, wherein routing a plurality of cans includes controlling a routing rate of a plurality of cans based on activation times and distances between adjacent groups.

16. The method of claim 15, wherein the step of irradiating the ultraviolet radiation includes irradiating the plurality of cans with the ultraviolet radiation having only a wavelength defined within a range of about 200 nm to about 400 nm.

16. The method of claim 15, wherein applying the ultraviolet radiation comprises applying the ultraviolet radiation at a power determined within a range between about 2 W/ ^cm2 and about 24W/ ^cm2 .