JPH0359386A - Surface drying device - Google Patents

Abstract

PURPOSE:To dry the surface of an objective matter efficiently in a short period of time while maintaining clean environment and remove liquid adhered to the surface by providing the projecting means of laser beams, having a wave length absorbed selectively by the liquid adhered to the surface of the objective matter, against the surface of the objective matter. CONSTITUTION:A surface drying device 10 includes a laser beam generating device 12 and a laser beam projecting device 14, projecting laser beams B against liquid L adhered to the upper side surface of an objective matter W. The laser beams B, having a wave length absorbed by the liquid L selectively, are selected. Upon removing the liquid L adhered to the surface of the objective matter W, the laser beams B, generated by the laser beam generating device 12, are projected from the laser beam projecting device 14 against the liquid L to evaporate the liquid in a projecting range instantaneously. The projecting position of the laser beams B is moved across the whole surface area of the objective matter W in cooperation with the operation of a turn table whereby the drying of the objective matter W may be finished.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is directed to drying an object that has become wet due to various liquids such as cleaning fluids and paints adhering to its surface. The present invention relates to a surface drying device for removing.

[Prior Art] In cleaning work using a cleaning liquid, application work using a liquid paint, and others, there are various cases in which various liquids adhere to the surface of an object and the object becomes wet.

Here, if each air plate is used to the extent that the air pressure is applied to the surface of the tvA, the liquid may act as an impurity and have an adverse effect.

Therefore, conventionally, after the object becomes wet, the object is transported into equipment such as a drying oven in order to dry the surface of the object. Then, hot air or the like is applied to the surface of the object inside the equipment to dry the surface and remove the adhering liquid.

[Problems to be Solved by the Invention] However, with the conventional drying equipment using hot air, etc. as described above, it is not possible to efficiently dry the surface of an object in a short time while maintaining a clean atmosphere. Ta. That is,
Since the liquid to be removed evaporates and evaporates relatively gently due to heat transfer, thermal conduction, and radiation, impurities in the liquid may become concentrated, or the hot air itself may transport or diffuse contaminants. There was a problem that the

The present invention was created in view of the problems of the prior art described above, and is capable of efficiently drying the surface of an object in a short period of time while maintaining a clean atmosphere, and removing liquid attached thereto. The purpose is to provide a surface drying device that can

[Means for Solving the Problems] The surface drying device of the present invention is a surface drying device for removing liquid adhering to the surface of an object, and includes means for irradiating the surface of the object with a laser beam. The laser beam has a wavelength that is selectively absorbed by the liquid attached to the surface of the object.

In carrying out the present invention, the object may be fixed, or may be rotatably supported and rotated as the object is irradiated with laser light.

In addition, as a laser beam that is selectively absorbed by a liquid attached to the surface of an object, for example, when the liquid is water, CO
Or a CO2 laser is used.

However, it is also possible to use various lasers with better selectivity.

[Operation] According to the surface drying device of the present invention having the above-described configuration, the liquid adhering to the laser beam irradiation range on the surface of the object is instantaneously vaporized and evaporated by the laser beam irradiation. Therefore, unlike when hot air is used, impurities in the liquid are not gradually concentrated, and contaminants are not transported or diffused.

Here, since the laser beam has a wavelength that is selectively absorbed by the liquid attached to the surface of the object, the surface of the object will not be damaged by irradiation with the laser beam.

[Example] Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

In FIG. 1, the surface drying device, which is generally designated by the reference numeral 10, includes a laser beam generator 12 and a laser beam irradiation device 1 that irradiates a liquid adhered to the upper surface of an object W with a laser beam B.
Contains 4. Here, the laser beam B is selected to have a wavelength that is selectively absorbed by the liquid. In other words, the laser beam B is determined by the type of liquid.

Although not clearly shown in FIG. 1, the laser beam irradiation device 14 is provided with a mechanism for moving the irradiation position of the laser beam B as shown by arrow A. Further, the object W is placed on a rotating table (not shown).

When removing liquid adhering to the surface of the object W,
The laser beam B generated by the laser beam generator 12 is irradiated onto the liquid from the laser beam irradiator 14, and instantaneously evaporates the liquid on the irradiation range. In conjunction with the operation of a rotary table (not shown), the irradiation position of the laser beam B is moved (scanned) over the entire surface of the object W. This completes drying of the object W.

2 and 3 show examples of the laser beam irradiation device 14, respectively.

In FIG. 2, an optical fiber 18 is connected to the laser beam generator 12, and the laser beam generated by the generator 12 passes through the optical fiber 18 and is irradiated as laser beam B from its tip 19. be done. This tip portion 19 is supported and fixed to a moving head 20, and the moving head 20
slides on the guide member 22 as shown by arrow A.

Note that various actuators and the like can be used as means for slidingly moving the movable head 20 on the guide member 22, but they are not shown.

In the embodiment shown in FIG.
4. It is designed to move further by sliding on the top. here,
For the sliding portion of the guide member 22, a guide roller system or a magnetic levitation system may be employed. In this case, the magnetic levitation method is preferable from the viewpoint of preventing dust generation, but the guide roller method is preferable from the viewpoint of simplifying the equipment. In other words, both methods can be adopted depending on the situation.

Although it is possible to use something other than a fiber as the laser beam guide member through which the laser beam generated by the laser beam generator 12 passes, a fiber is most preferable from the viewpoint of weight reduction.

[Effects of the Invention] As explained above, according to the surface drying device of the present invention, by irradiating the liquid attached to the surface of the object with laser light, the liquid on the irradiation range is instantaneously vaporized and evaporated. be able to. Moreover, it does not damage the surface of the object.

Therefore, high efficiency of drying work and clean atmosphere can be achieved at the same time.

[Brief explanation of drawings]

FIG. 1 is a simplified front view of one embodiment of the present invention, FIG. 2 is a perspective view of an embodiment of a laser beam generator used in the present invention, and FIG. 3 is a simplified front view of one embodiment of the present invention. FIG. 7 is a perspective view showing another embodiment of the light generating device. IO...Surface drying device 12...Laser beam generator 14...Laser beam irradiation device B...Laser beam L...Liquid W...Target figure 2

Claims (1)

[Claims] A surface drying device for removing liquid adhering to the surface of an object is provided with means for irradiating the surface of the object with laser light, and the laser beam is selectively absorbed by the liquid adhering to the surface of the object. This is a surface drying device that is characterized by its wavelength.