JPS62163769A - Coating device - Google Patents

Abstract

PURPOSE:To prevent uneven coating, thinning, and dripping by providing a slit opening which is elastically opened at more than the specified internal pressure to charge the coating liq. into a coating liq. reservoir, and furnishing a coating member in the vicinity of the slit opening. CONSTITUTION:The coating liq. is sent under pressure through a hose 12, and charged into the coating liq. reservoir 6 from a supply passage 10 through a valve 11. The pressure in the coating liq. reservoir 6 is increased, and the slit opening 7 is opened and the coating liq. is discharged over the whole width of the slit opening 7 when the pressure exceeds the elasticity of the peripheral wall part 3a of a cover plate 3. Accordingly, when the coating device is moved in accordance with the amount of discharge of the coating liq. while the peripheral wall part 3a of the main body 1 is abutted on the surface W to be coated, a coated film having almost uniform thickness can be formed on the surface W to be coated while the discharged coating liq. is pressed on the surface by the coating edge 8.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a coating device used to apply coating liquids such as various paints and liquid adhesives. The present invention relates to a coating device used to form a relatively thick coating close to a coating surface.

(Prior art and its problems) In a conventional coating roller device, a coating roll is rotatably attached to a hollow roller shaft connected to a pressure pump via a liquid-feeding vibrator or the like, and This roller shaft is provided with a plurality of coating liquid outflow holes at equal intervals, so that the coating liquid flowing out from these outflow holes leaks outward from the inner surface of the coating roll cylinder.

In such a conventional roller device, the outflow hole located near the coating liquid introduction αII of the roller shaft has a high liquid pressure, so it is easy to come out. This tends to create a gradient in the width direction and uneven coating, and depending on the viscosity of the coating liquid, droplets may fall from the area near the introduction side and stain the surrounding area.To avoid this, reduce the liquid feeding pressure. On the other hand, blurring may occur in areas far from the introduction side, making pressure adjustment extremely difficult. Also, sending 1
＆There is a problem that the coating liquid remaining inside the coating roll tube and the delivery pipe while stopped becomes droplets when the coating roller is tilted, and furthermore, the roller shaft may leak out. There was a problem in that the holes and especially the coating roll were easily clogged, requiring frequent disassembly and cleaning.

(Technical means for solving the problem) The present invention was made to solve the problems such as uneven coating and clogging as described above. 6 is formed, a supply path IO for supplying the coating liquid into the coating liquid reservoir 6 is provided, and the coating liquid in the coating liquid reservoir 6 has a slit interposed lower part 14 that elastically opens when the coating liquid in the coating liquid reservoir 6 is above a certain internal pressure. The slit 7 is located near the lower 14 between the slits.
) A coating member 8.15 is provided for coating the surface to be coated with the coating liquid discharged from the lower interposed part 14.

(Example) Embodiments of the present invention will be described below based on the drawings.

1 to 4 show a first embodiment of a coating device according to the present invention. In these figures, the main body 1 is integrally molded from plastic or the like and has a wedge-shaped side view.
A recess 2 having an isosceles diagonal shape in plan view is provided in this, and therefore, the recess 2 is deep at the apex of the isosceles triangle and becomes shallower as it approaches the base. On the upper surface of the main body 1, a cover plate 3 made of rubber and a reinforcing holding plate 4 made of a metal plate are placed over the cover plate 3 and attached with screws 5. The plate 3 closes the entire recess 2 of the main body l, thereby forming a coating liquid reservoir 6 in the recess 2, and the bottom part that is not fixed with the screws 5 has the main body l
The peripheral wall portions 1a and 3a of the cover plate 3 form a lower portion between the slits, which opens when the pressure within the coating liquid reservoir 6 exceeds a certain level. The cover plate 3 has a smeared edge 8 integrally formed on its peripheral wall 1a.

This application edge 8 is for applying the application liquid discharged from the slit lower part onto the surface to be applied.

A grip bar 9 is attached to the center of the rear part of the main body l, and this grip bar 9 has a supply path 10 for supplying the coating liquid to the coating liquid reservoir 2, and a function for shutting off the supply passage 10 and adjusting the aperture. A valve 11 is provided.

Further, a hose 12 communicating with the supply path 10 is connected.

According to the coating device configured as described above, when the coating liquid is force-fed from a pressure-feeding tank or pump (not shown) through the hose 12, it enters the coating liquid reservoir 6 from the supply path 10 via the valve 11. When the pumping pressure is low or when the valve 11 is closed and the pressure inside the coating liquid reservoir 6 is low, the slit interposed lower is closed and the coating liquid does not flow out. When the pressure inside the coating liquid reservoir 6 rises and overcomes the elastic force of the peripheral wall portion 3a of the cover plate 3, the slit sandwich lower opens and the coating liquid is discharged over the entire width of the slot-shaped opening 7. Therefore, as shown in FIG. 4, when the coating device is moved in accordance with the discharge amount of the coating liquid with the peripheral wall 3a of the main body 1 in contact with the surface W to be coated, the discharged coating liquid will be applied to the coating surface W. Part 8
A coating film having a substantially uniform thickness can be formed on the surface W to be coated while being pressed by the coating material. At this time, the coating liquid that has entered the coating liquid reservoir 6 from the supply path 10 is pushed out laterally by the shape of the four parts 2 and moves, so even though the volume of the coating liquid reservoir 6 is small, The liquid is uniformly supplied to the lower portion between the slits.

By adjusting the moving speed of the coating device, the aperture amount of the valve 11, and the angle between the coating device and the surface W to be coated (that is, the gap between the falling edge 8 and the surface W to be coated), the coating film can be formed. The thickness can be adjusted. Further, by variously selecting the length and hardness of the coating edge 8, the thickness of the peripheral wall portion 3a of the main body 1, etc., it is possible to create a coating device that corresponds to the required film thickness. In particular, if the coating edge 8 is made hard and highly elastic, the coating liquid can be strongly pressed and rubbed onto the surface W to be coated. Note that depending on the elasticity, size and shape of the cover plate 3 and presser plate 4, and the position of the screws 5, the amount of opening at both ends is smaller than that at the center of the lower gap, as shown in FIG. As shown, depending on the 7 times of application, the center part becomes thicker than the coating P.
However, in this case, by overcoating both ends as shown in the same figure, it is possible to obtain a substantially uniform film thickness as a whole as shown by the chain line.

When the valve 11 is closed or the pressure of the source of pumping liquid is reduced, the elasticity of the cover plate 4 causes the peripheral wall portion 3a to come into pressure contact with the peripheral wall portion 1a of the main body l, thereby closing the lower slit gap. , the coating liquid does not flow out to the outside, so there is no risk of the remaining liquid in the coating liquid reservoir 6 accidentally leaking and damaging the surface to be coated.Furthermore, when pressure is applied to the coating device from the outside, for example, When used for coating work underwater, the lower portion between the slits is further closed by water pressure, which not only prevents the coating liquid from leaking outside but also prevents water from entering the coating liquid reservoir 6. It can be prevented. Therefore, it is also suitable for application in water. In this case, when the coating liquid in the coating liquid reservoir 6 reaches a pressure that overcomes the force obtained by adding the pressing force of the water pressure to the elastic force of the peripheral wall portion 3a, the lower between the slits opens.

In the above embodiment, if the cover plate 3 has appropriate strength, the presser plate 4 may be omitted;
It is also possible to integrally mold the grip bar 9 and the like with the main body 1 from rubber or plastic having appropriate elasticity.

FIG. 6 shows another embodiment, in which a rotatable roller 13 is attached to the main body 1 of the coating device described above, whereby the angle between the coating device and the surface W to be coated can be stabilized. . By adjusting the height of the roller 13, the thickness of the coating film can be adjusted. Incidentally, if a small roller is also attached to the peripheral wall portion 1a, the frictional resistance can be further reduced.

FIG. 7 shows another embodiment, in which this coating device has a main body 13.
are formed in a symmetrical shape, and both peripheral wall portions 13a, 13a forming the slit-like opening 14 are integrally formed with elastic coating edges 15.15.

According to this, as shown in the figure, the coating device can be erected almost perpendicularly to the surface W to be coated, and the coating can be applied by moving it back and forth in the same manner as a conventional spatula or brush.

FIG. 8 shows another embodiment, in which this coating device has a main body 13.
By attaching a large number of brushes 16 to both sides of the slit-shaped opening 14 so as to surround the slit-shaped opening 14, the coating liquid is uniformly supplied to the entire width direction of the brushes 16, and the coating liquid can be applied to the surface W to be coated by the brushes 16. can.

In the above embodiments, the application edges 8, 15 and the brush 16 have been described as the application members, but the application edges may be patterned, comb-shaped, roller-shaped, or other materials other than these. It is possible to adopt the shape and structure of.

(Effects of the Invention) According to the apparatus of the present invention, a slit-shaped opening that opens when the pressure of the coating liquid in the coating liquid reservoir exceeds a certain level is provided, and the coating liquid flows onto the surface to be coated through this slit-shaped opening. Since the coating liquid is discharged, the amount of coating liquid discharged is uniform over the entire length of the slit-shaped opening, and uneven coating, blurring, and droplet falling are prevented, and good coating can be performed. Furthermore, when the liquid supply is stopped, the slit-like opening is automatically closed, so that the remaining liquid in the coating liquid reservoir does not leak outside. In addition, unlike conventional coating roller devices, there is no coating roll, and the coating liquid flows directly onto the surface to be coated through the slit-shaped opening, eliminating clogging and requiring less maintenance. Since it is easy and has an extremely simple structure, it is easy to manufacture and costs can be reduced.

Furthermore, since a coating member is provided near the slit-shaped opening to coat the coating liquid flowing out from the slit-shaped opening onto the surface to be coated, the coating liquid can be coated onto the surface to be coated using the coating member. It is possible to level the coated surface and adjust the thickness of the coated film.

Due to these advantages, the coating device according to the present invention can be suitably used for coating in water and the like.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal cross-sectional view of a coating device according to the construction/embodiment, FIG. 2 is a cross-sectional view taken along the line ■-■ in FIG. 1, and FIG. FIG. 4 is a perspective view of the coating device of
FIG. 5 is an enlarged view of the main part of the figure, FIG. 5 is a diagram for explaining the case of overcoating, and FIGS. 6 to 8 are longitudinal sectional views showing other embodiments of the coating device. DESCRIPTION OF SYMBOLS 1... Main body, la... Surrounding wall part, 2... Recessed part, 3...
...Cover plate, 6... Application liquid reservoir, 7.14... Three/ ) shaped opening, 8°15... Painting edge (painting member), 10... Supply channel, 16. ...Brush (applying material).

Claims (1)

[Claims] A coating liquid reservoir is formed inside, a supply path is provided for supplying the coating liquid into the coating liquid reservoir, and the coating liquid in the coating liquid reservoir has a slit-like opening that elastically opens when the internal pressure is higher than a certain level. A coating device comprising: a coating member disposed near the slit-shaped opening for coating a surface to be coated with a coating liquid discharged from the slit-shaped opening.