Mobile UVA curing system for collision and cosmetic repair of automobiles

Abstract

A radiation system includes a radiation device coupled to a control unit; a radiation blocker having an adaptor opening for receiving the radiation device when the radiation device is positioned on the radiation blocker; and a carrier comprising a first compartment for housing the radiation blocker and, a second compartment for housing the control unit. The adaptor opening can dimensionally fit the radiation device to block radiations from the radiation device when the radiation device is positioned in the radiation blocker. The radiation device can produce radiation having peak radiation wavelength in a range of from about 250 nm to about 450 nm and can have a peak irradiation power in a range of from about 0.5 W/cm2 to about 10 W/cm2.

Description

TECHNICAL FIELD

The present disclosure is directed to a radiation system. This disclosure is further directed to a radiation system for curing a radiation curable coating composition to form a cured coating layer.

BACKGROUND

The use of radiation curable coatings is becoming more common in coating industry. Such use requires a combination of radiation curable coating compositions and a radiation source. Typically, an ultraviolet (UV) source such as a UV lamp can be used for curing a UV curable coating composition applied over a substrate to form a cured coating layer. However, the radiation such as the UV radiation from the UV lamp can be harmful for operators during the use.

Therefore, it is desirable to provide an improved radiation system. In addition, other objects, desirable features and characteristics will become apparent from the subsequent summary and detailed description, and the appended claims, taken in conjunction with the accompanying drawings and this background.

SUMMARY

According to an exemplary embodiment, a radiation system includes a radiation device coupled to a control unit through a coupling device; a radiation blocker having an adaptor opening for receiving the radiation device when the radiation device is positioned on the radiation blocker, a carrier comprising a compartment for housing the radiation blocker and a target part and a coating of a UV radiation curable composition, the target part being positioned at a predetermined distance from the radiation device. The radiation system provides that the adaptor opening of the radiation blocker receives the radiation device to block and vent radiation from the radiation device when the radiation device is positioned on the radiation blocker; and that the radiation device produces UV radiation in a wavelength range between 100 nm to 800 nm at a peak power level when not positioned on the radiation blocker and cures the UV radiation curable composition on the target part when at the predetermined distance.

According to another exemplary embodiment, a kit for radiation system is provided. The kit comprises a radiation device coupled to a control unit through a coupling device, a radiation blocker having an adaptor opening for receiving the radiation device when the radiation device is positioned on the radiation blocker, a carrier comprising a compartment for housing the radiation blocker and a target part and a coating of a UV radiation curable composition, the target part being positioned at a predetermined distance from the radiation device. The kit for a radiation system also includes the adaptor opening of the radiation blocker receiving the radiation device to block and vent radiation from the radiation device when the radiation device is positioned on the radiation blocker, and the radiation device producing UV radiation in a wavelength range between 100 nm to 800 nm at a peak power level when not positioned on the radiation blocker and cures the UV radiation curable composition on the target part when at the predetermined distance.

BRIEF DESCRIPTION OF DRAWINGS

The present invention will hereinafter be described in conjunction with the following drawing figures, wherein like numerals denote like elements, and wherein:

FIGS. 1A and 1B show schematic presentations of an exemplary embodiment of the system. In FIG. 1A, the radiation device is not in a seated position. In FIG. 1B, the radiation device is in a seated position.

FIGS. 2A through 2C show schematic cross-sectional views of exemplary embodiments of the system. In FIG. 2A, a radiation blocker is illustrated with total radiation blocking elements on all sides. In FIG. 2B, an exemplary embodiment of a radiation blocker is illustrated UV blocking elements. In FIG. 2C, another exemplary embodiment of a radiation blocker is illustrated with UV blocking elements.

FIGS. 3A and 3B show schematic cross-sectional views of exemplary embodiments of the system having (FIG. 3A) a carrier cooling fan or (FIG. 3B) a carrier cooling air duct.

FIGS. 4A through 4C show schematic cross-sectional views of exemplary embodiments of the system having (FIG. 4A) a vent fan and a shutter system; (FIG. 4B) a radiation reflector; and (FIG. 4C) a radiation area.

FIG. 5 shows a schematic illustration of an exemplary embodiment of the system having a radiation supporting device.

DETAILED DESCRIPTION

The following detailed description is merely exemplary in nature and is not intended to limit the invention or the application and uses of the invention. Furthermore, there is no intention to be bound by any theory presented in the preceding background of the invention or the following detailed description.

The features and advantages of the present invention will be more readily understood, by those of ordinary skill in the art, from reading the following detailed description. It is to be appreciated that certain features of the invention, which are, for clarity, described above and below in the context of separate embodiments, may also be provided in combination in a single embodiment. Conversely, various features of the invention that are, for brevity, described in the context of a single embodiment, may also be provided separately or in any sub-combination. In addition, references in the singular may also include the plural (for example, “a” and “an” may refer to one, or one or more) unless the context specifically states otherwise.

The use of numerical values in the various ranges specified in this application, unless expressly indicated otherwise, are stated as approximations as though the minimum and maximum values within the stated ranges were both proceeded by the word “about.” In this manner, slight variations above and below the stated ranges can be used to achieve substantially the same results as values within the ranges. Also, the disclosure of these ranges is intended as a continuous range including every value between the minimum and maximum values.

This disclosure is directed to an improved radiation system. The radiation device can comprise the following components as illustrated.

A radiation device (1) coupled to a control unit (2) through the coupling device (3).

A radiation blocker (4) having an adaptor opening (5) for receiving the radiation device (1) when the radiation device is positioned on the radiation blocker (4).

A carrier (10) including a first compartment (11) for housing the radiation blocker (4). A second compartment (12) may be included for housing the control unit, and one or more carrier motion devices (13).

The adaptor opening may dimensionally fit the radiation device (1) to block radiations from the radiation device (1) when the radiation device (1) is in the seated position on the radiation blocker (4).

The system can have the radiation device not in the seated position (FIG. 1A) or with the radiation device in the seated position (FIG. 1B). The system can be mobile as illustrated.

The radiation device can comprise a UV source such as a UV light bulb (20) such as a mercury UV lamp, a UV light-emitting diode (LED), or any other UV source that can provide the desired irradiation power at the target part and coating. A UV power measuring device, such as a UV POWER PUCK® FLASH, available from The EIT Instrument, Sterling, Va. 20164, USA, can be suitable to measure UV irradiation power.

The control unit (2) can be used to adjust or control the UV irradiation power, duration of power timing, or a combination thereof. The irradiation power measured at the coating to be tested, such as the target coating or the control coating, can be adjusted by adjusting power to the radiation device such as the power to the UV lamp or UV LED, the distance between the radiation device and the coating to be irradiated, UV reflection assembly such configurations of radiation reflector disclosed hereafter, or a combination thereof. The control unit (2) can comprise one or more display devices (2a-2b), one or more adjustment devices such as dials (2d-2f) (FIG. 1A). The control unit can further comprise other control devices as determined necessary.

The radiation device can be configured to produce radiations having peak radiation wavelength in a range of from 250 nm to 450 nm and has a peak irradiation power in a range of from 0.5 W/cm² to 10 W/cm². Different UV source can also produce UV irradiations at same or different one or more peak wavelengths. In one example, an Arc UV source can have a peak wavelength at about 315 nm or about 365 nm. In another example, an LED UV source can have a peak wavelength at about 365 nm.

The radiation blocker (4) can comprise one or more UV blocking elements (6) that permit visible radiations (21) to exit the radiation blocker (4) while blocking UV radiations (22) from exiting the radiation blocker (4), when the radiation device is in the seated position (FIG. 2A-2C). The UV blocking elements can be transparent, translucent, fluorescent, or a combination thereof. Examples of radiation blocker (4) can include UV blocking glass, UV blocking plastics or other polymers, or a combination thereof. The radiation blocker (4) can also comprise one or more total radiation blocking elements (7) that block UV radiations and visible radiations from exiting said radiation blocker (4). Examples of the total radiation blocking elements can include metal sheets or blocks, ceramic sheets or blocks, or any other materials that can block UV radiations and visible radiations.

One advantage of the system disclosed herein is that the UV blocking elements (6) can permit visible radiations (21) to exit the radiation blocker (4) so an operator can visually confirm that the UV source is actually powered when the radiation device is seated on the radiation blocker (4) without being exposed to the UV irradiation.

The carrier can further comprise a coupler supporting device (14) for storing and supporting said one or more coupling device (3) that couples the radiation device and the control unit (FIG. 1A, FIG. 1B and FIG. 5). The carrier can further comprise one or more storage compartments (15) (FIG. 1A, FIG. 1B and FIG. 5).

The carrier can further comprise at least a cooling device (16) for cooling the radiation device in the seated position. The cooling device can comprise a carrier cooling fan (16) as illustrated in FIG. 3A, a carrier cooling air duct 16′ as illustrated in FIG. 3B, or a combination thereof. The carrier can further comprise one or more vents (10a-10b) as illustrated in FIG. 1A to provide ventilation. In one example, ambient external air (30) can be forced by the fan (16) into the carrier to cool the radiation blocker (4) (FIG. 3A). In another example, cooled air (30′) can be provided to the carrier via the carrier cooling air duct (16′) (FIG. 3B). In another example, the carrier can comprise a combination of the cooled air and the fan to provide the cooled air (30′) into the carrier by the fan (16). The radiation blocker (4) can have a plurality of thermal fins (7a) for disperse heat (FIG. 3A and FIG. 3B). In another example, the carrier can include the thermal fin and at least one vent (10a) or (10b) without the fan.

The cooling device can comprise a cooling sensing device (17) to power on the cooling device when said radiation device is in the seated position. When the radiation device is moved from the seated position, the cooling sensing device (17) can automatically turn off the cooling device to conserve power.

The carrier can further comprise an activity sensing device (18) (FIG. 2C) coupled to the radiation device and the control unit to power off the radiation device if the radiation device is powered and remains in the seated position for a predetermined period of time. In one example, the cooling sensing device (17) and the activity sensing device (18) can be configured into one single device (FIG. 2C) so the cooling device can be triggered to be turned on when the radiation device is placed in the seated position and subsequently, the power can be turned off if the radiation device remains in the seated position for a predetermined period of time.

The radiation device can comprise at least one cooling vent (40) on the radiation device (FIG. 4A-4B). The radiation device can further comprise at least one vent fan (41), a shutter system (43) to block the radiation of the UV source from exiting through the cooling vent (40) while allowing cooling air (42) to flow through the cooling vent, or a combination thereof.

The radiation device can further comprise a radiation reflector (44) (FIG. 4B and FIG. 4C) to reflect the radiation toward a predetermined direction, such as directing to a substrate (FIG. 4C). The radiation device can be configured using the radiation reflector, the opening of the radiation device to adjust a radiation area (45) over a target (31) (FIG. 4C).

The one or more carrier motion devices (13) can be selected from wheels, powered wheels, rolling wheels, tracks, rails, or a combination thereof.

The radiation system can further comprise a battery power source (32) for supplying power to the radiation device (1), the control unit (2), or a combination thereof.

The carrier can further comprise one or more radiation supporting devices (19) (FIG. 5) to position said radiation device for providing radiation to a target. In one example, one of radiation supporting devices (19) can be a retractable arm so the radiation device can be attached at one end. In another example, the radiation supporting device can be coupled to a computing device or other automation devices to move the radiation device in a predetermined pattern, predetermined distance to a target, a range of predetermined velocity, or a combination thereof.

The aforementioned target can comprise a target coating layer (34), such as a wet coating layer over a coated area of a substrate (31) (FIG. 5). The target coating layer (34) can be formed from one or more radiation curable target coating compositions applied over the coated area of the substrate. The target coating compositions can be solvent borne or waterborne coating compositions. The target coating layer can be cured with the radiation alone or a combination of the radiation with one or more curing processes selected from thermal curing, physical drying curing, chemical curing, or a combination thereof. Thermal curing can include curing at ambient temperatures, such as temperatures in a range of from 15° C. to 50° C.; at elevated temperatures, such as temperatures in a range of from 0.50° C. to 350° C.; or a combination thereof. Lacquer coating compositions can be cured by drying. The term “lacquer” or “lacquer coating composition” refers a coating composition that is capable of drying by solvent evaporation to form a durable coating on a substrate.

Chemical curing can include the reactions between crosslinkable and crosslinking functional groups. Typical crosslinkable and crosslinking functional groups can include hydroxyl, thiol, isocyanate, thioisocyanate, acid or polyacid, acetoacetoxy, carboxyl, primary amine, secondary amine, epoxy, anhydride, ketimine, aldimine, or a workable combination thereof. Some other functional groups such as orthoester, orthocarbonate, or cyclic amide that can generate hydroxyl or amine groups once the ring structure is opened can also be suitable as crosslinkable functional groups.

It would be clear to one of ordinary skill in the art that certain crosslinking functional groups crosslink with certain crosslinkable functional groups. Examples of paired combinations of crosslinkable and crosslinking functional groups can include: (1) ketimine functional groups crosslinking with acetoacetoxy, epoxy, or anhydride functional groups; (2) isocyanate, thioisocyanate and melamine functional groups each crosslinking with hydroxyl, thiol, primary and secondary amine, ketimine, or aldimine functional groups; (3) epoxy functional groups crosslinking with carboxyl, primary and secondary amine, ketimine, or anhydride functional groups; (4) amine functional groups crosslinking with acetoacetoxy functional groups; (5) polyacid functional groups crosslinking with epoxy or isocyanate functional groups; and (6) anhydride functional groups generally crosslinking with epoxy and ketimine functional groups.

The irradiation curable functional groups can include ethylcnically unsaturated double bonds, such as acrylic or methacrylic double bonds. Sources of UV irradiation for curing can include natural sunlight or artificial UV radiation sources. Examples of UV irradiation for curing can include, but not limited to, UV-A radiation, which falls within the wavelength range of from 320 nanometers (nm) to 400 nm; UV-B radiation, which is radiation having a wavelength falling in the range of from 280 nm to 320 nm; UV-C radiation, which is radiation having a wavelength falling in the range of from 100 nm to 280 nm; and UV-V radiation, which is radiation having a wavelength falling in the range of from 400 nm to 800 nm.

A coating composition having crosslinkable and crosslinking functional groups and the irradiation curable functional groups can be cured by a combination of the chemical curing and the irradiation curing. Such coating compositions can be referred to as a dual cure coating composition.

The substrate or target part can be a vehicle or vehicle part.

This disclosure is further directed to a kit for a radiation system. The kit can include:

a radiation device (1);

a control unit (2);

one or more coupling devices (3);

a radiation blocker (4) having an adaptor opening (5) for receiving the radiation device (1) positioned on the radiation blocker (4);

a carrier (10) comprising a first compartment (11) for housing the radiation blocker (4), and a second compartment (12) for housing the control unit. The kit may include one or more carrier motion devices (13).

The radiation device (1) may be connectable to the control unit (2) through one or more coupling devices (3).

The adaptor opening (5) dimensionally fits the radiation device (1) to block radiations from the radiation device (1) when the radiation device (1) is positioned on the radiation blocker (4).

The radiation device (1) of the kit can be configured to produce radiations having peak radiation wavelength in a range of from about 250 nm to about 450 nm and has a peak irradiation power in a range of from about 1 W to about 10 W.

The radiation blocker (4) of the kit can comprise one or more UV blocking elements (6) that are capable of permitting visible radiations (21) to exit the radiation blocker (4) while blocking UV radiations (22) from exiting the radiation blocker (4), the one or more UV blocking elements are transparent, translucent, fluorescent, or a combination thereof.

The carrier of the kit can further comprise at least a cooling device (16) connectable to the radiation device and the control unit for cooling the radiation device, and the cooling device comprises a cooling sensing device (17) associated with the cooling device to power on the cooling device when the radiation device is positioned in the radiation blocker (4).

The carrier can further comprise an activity sensing device (18) connectable to the radiation device and the control unit to power off the radiation device when assembled and powered, if the radiation device is powered and remains in the seated position for a predetermined period of time.

While at least one exemplary embodiment has been presented in the foregoing detailed description, it should be appreciated that a vast number of variations exist. It should also be appreciated that the exemplary embodiment or exemplary embodiments are only examples, and are not intended to limit the scope, applicability, or configuration of the invention in any way. Rather, the foregoing detailed description will provide those skilled in the art with a convenient road map for implementing an exemplary embodiment, it being understood that various changes may be made in the function and arrangement of elements described in an exemplary embodiment without departing from the scope of the invention as set forth in the appended claims and their legal equivalents.

Claims

1. A radiation system comprising: a radiation device coupled to a control unit through a coupling device;a radiation blocker having an adaptor opening for receiving the radiation device when the radiation device is positioned on the radiation blocker;a carrier comprising a compartment for housing the radiation blocker;a target part and a coating of a UV radiation curable composition, the target part being positioned at a predetermined distance from the radiation device;wherein the adaptor opening of the radiation blocker receives the radiation device to block and vent radiation from the radiation device when the radiation device is positioned on the radiation blocker; andwherein the radiation device produces UV radiation in a wavelength range between 100 nm to 800 nm at a peak power level when not positioned on the radiation blocker and cures the UV radiation curable composition on the target part when at the predetermined distance.

2. The radiation system of claim 1, wherein the radiation device is configured to produce radiations having peak radiation wavelength in a range from about 250 nm to about 450 nm and at a peak irradiation power in a range of from about 0.5 W/cm2 to about 10 W/cm2.

3. The radiation system of claim 1, wherein said radiation blocker comprises one or more UV blocking elements that permit visible radiations to exit said radiation blocker while blocking UV radiations from exiting said radiation blocker, when the radiation device is positioned on the radiation blocker.

4. The radiation system of claim 3, wherein said UV blocking elements are transparent, translucent, fluorescent, or a combination thereof.

5. The radiation system of claim 1, wherein said carrier further comprises a coupler supporting device for storing and supporting said one or more coupling device that couples the radiation device and said control unit.

6. The radiation system of claim 1, further including an indicator providing visual confirmation of power to the radiation device when the radiation device is positioned on the radiation blocker.

7. The radiation system of claim 1, wherein the carrier further comprises at least a cooling device for cooling the radiation device when the radiation device is positioned on the radiation blocker.

8. The radiation system of claim 7, wherein said cooling device comprises a cooling sensing device to power on the cooling device when the radiation device is positioned on the radiation blocker.

9. The radiation system of claim 1, wherein said carrier further comprises an activity sensing device coupled to the radiation device and the control unit to power off the radiation device if the radiation device is powered and remains positioned on the radiation blocker for a predetermined period of time.

10. The radiation system of claim 1, wherein UV radiation curable composition is a wet coating layer over a coated area of the target part, and wherein the wet coating layer is formed from a radiation curable coating composition applied over the coated area of the target part.

11. The radiation system of claim 1 further comprising a battery power source for supplying power to the radiation device, said control unit, or a combination thereof.

12. A target part curing system for curing a UV curable coating to a target part, the system comprising: a target part on which a curable coating is applied;a radiation device including housing, a reflector and a UV source;the reflector positioned within the housing to reflect UV radiation from the UV source and to focus the UV radiation toward the target part which is positioned at a predetermined distance from a bottom of the radiation device housing;the UV source producing UV radiation in a wavelength range between 100 nm to 800 nm at a peak power level when at the predetermined distance from the bottom of the radiation device housing;a radiation blocker having an opening for receiving the radiation device and dimensioned for housing the radiation device, and the radiation blocker substantially preventing the UV radiation from exiting the radiation blocker when the radiation device is positioned within the radiation blocker, and a vent to provide ventilation for the radiation blocker;a carrier including a first compartment for housing the radiation blocker and a second compartment for housing a control unit to control radiation power and duration of the UV source;

13. The target part curing system of claim 12, wherein the UV source is configured to produce radiations having peak radiation wavelength in a range of from about 250 nm to about 450 nm and has a peak irradiation power in a range of from about 1 W to about 10 W.

14. The target part curing system of claim 12, wherein the radiation blocker comprises one or more UV blocking elements that are capable of permitting visible radiations to exit said radiation blocker while blocking UV radiations from exiting said radiation blocker, the one or more UV blocking elements are transparent, translucent, fluorescent, or a combination thereof.

15. The target part curing system of claim 12, wherein the carrier further comprises a cooling device associated with the radiation device and the control unit for cooling the radiation device, and the cooling device comprises a cooling sensing device connectable to the cooling device to power on the cooling device when the radiation device is positioned within the radiation blocker.

16. The target part curing system of claim 12, wherein the carrier further comprises an activity sensing device associated with the radiation device and the control unit to power off the radiation device when assembled and powered, if the radiation device is powered and remains positioned within the radiation blocker for a predetermined period of time.

17. The target part curing system of claim 12, wherein the radiation device cures a coating of UV radiation curable composition on the target part when the radiation device is moved in a predetermined pattern with respect to the target part.

18. The target part curing system of claim 12, wherein the radiation device cures a coating of UV radiation curable composition on the target part when the radiation device is moved at a predetermined velocity over the target part.

19. The target part curing system of claim 12, wherein the radiation device cures a coating of UV radiation curable composition on the target part when the radiation device is moved at a predetermined velocity and in a predetermined pattern over the target part.

20. The target part curing system of claim 12, wherein the radiation device cures a coating of UV radiation curable composition on the target part when the radiation device is moved in a combination of a predetermined pattern and a predetermined velocity over the target part while the target part is positioned at a predetermined distance from the bottom of the radiation device housing.