JPH0254147B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a coating device used for coating various paints, liquid adhesives, etc. The present invention relates to a coating device that performs coating by bringing a liquid overflowing portion close to a surface to be coated.

(Prior art and its problems) A conventional coating roller device has a coating roll rotatably attached to a hollow roller shaft connected to a pressure pump via a liquid feeding pipe, etc. A plurality of coating liquid outflow holes are provided on the shaft at equal intervals, and the coating liquid flowing out from these outflow holes leaks outward from the inner surface of the coating roll tube. In other words, the outlet hole located closer to the coating liquid inlet side of the roller shaft is more likely to generate high liquid pressure, which tends to cause a widthwise gradient in the amount of coating liquid impregnated on the coating roll surface, resulting in uneven coating. Also, depending on the viscosity of the coating liquid, droplets may fall from the area close to the introduction side and contaminate the surrounding area, and if the liquid feeding pressure is reduced to avoid this, conversely, blurring may occur at the area far from the introduction side. This makes it difficult to adjust the pressure, and furthermore, the coating liquid remaining inside the coating roll cylinder and the delivery pipe while the liquid feeding is stopped may form droplets and drip when the coating roller is tilted. In addition, there were other problems such as the outflow holes of the roller shaft and especially the coating roll being easily clogged and requiring frequent disassembly and cleaning.

(Technical means for solving the problems) The present invention has been made to solve the above-mentioned problems such as uneven coating and clogging. A main body 1 is provided with a slit-like opening 3 which is shaped like a slit and forms a coating liquid reservoir 2 therein, and which elastically opens above a certain internal pressure to face the surface to be coated. It is characterized by comprising a coating liquid supply means 8.

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

Fig. 1 shows a first embodiment of the coating device according to the present invention, and in this figure, 1 is a cylindrical body, which is formed into a slightly curved body by integrally molding synthetic resin. A top wall portion 1a having a shape, side wall portions 1b extending downward from both ends thereof, and a lower wall extending from the lower ends of the side wall portions 1b, 1b so as to form a slightly downward slope so as to abut each other. Part 1c, 1
c, and folded edges 1d, 1d formed in an arc shape outward from the opposing ends of the lower walls 1c, 1c and folded back in mutually opposite directions. A coating liquid reservoir 2 is formed inside the cylindrical shape, and a slit-like opening 3 is provided between the opposite ends of the lower wall parts 1c and 1c, and is set to open at a certain internal pressure or higher. It is formed over the entire length of the body 1. Reference numeral 4 denotes a reinforcing cover body having almost the same length as the cylindrical body 1, and is made of an elastic metal plate and has a C-shaped cross section. The slit opening 3 of the cylindrical body 1 is held closed. At both ends of the reinforcing cover body 4, side lids 5, 5 are arranged which abut against both end surfaces of the cylindrical body 1 and seal the opening surface thereof. It is fixed to both ends of the upper wall portion, for example, by welding (the welded portions are indicated by 6 and 6 in the figure). Reference numerals 7, 7 are holding rods that are connected to a suitable support frame, and the reinforcing cover body 4 and the cylindrical body 1 are connected and fixed to the lower ends of these holding rods 7, 7, so that the cylindrical body 1 and the cover body 4 is the folded edge 1 of the cylindrical body 1.
The lower surfaces of d and 1d are maintained at a predetermined distance from the surface of the plate W to be coated. Incidentally, instead of such holding rods 7, 7, one side cover 5 may be attached and fixed to a holding frame 7' fixed on a suitable pedestal. Reference numeral 8 denotes a liquid feeding pipe serving as a coating liquid supplying means, and the distal end thereof is connected to the reinforcing cover 4 and the cylindrical body 1 in order to feed the coating liquid fed by the pressure pump to the coating liquid reservoir 2 inside the cylindrical body 1. It is installed so that it passes through the Above coated plate W
is placed on a moving table M such as a conveyor, and is adapted to move horizontally in the direction of the arrow in FIG. 1 at a constant speed.

Therefore, when using the above-mentioned coating device, the coating liquid pumped by the pump must be transferred to the liquid feeding pipe 8.
is stored in the coating liquid reservoir 2 in the cylindrical body 1, and when the internal pressure of the coating liquid reservoir 2 exceeds a preset pressure, the side walls 1b, 1b and the lower wall 1 of the cylindrical body 1
c and 1c are elastically deformed outward together with the corresponding portions of the cover body 4, and the slit-like openings 3 face the surface to be coated and open uniformly over the entire length, and the coating liquid flows out onto the surface to be coated. At the same time as the slit opening 3 opens, the plate W to be coated starts to move, and a coating film of a predetermined thickness is formed on the upper surface of the plate W to be coated. still,
The folded edges 1d of the cylindrical body 1 and the lower surface of the cylindrical body 1 act to stroke and flatten the surface of the coating film to be formed.
Therefore, the folded edges 1d, 1d may be provided only on one rear side of the slit-shaped opening 3 in the direction of movement. Further, when the liquid feeding is stopped, the internal pressure of the coating liquid reservoir 2 decreases, the slit-shaped opening 3 is automatically closed, and the outflow of the coating liquid is stopped. When the coating liquid has high viscosity, the gap between the folded edge 1d and the plate W to be coated is increased, and the slit-shaped opening 3 is
may be formed so that it is slightly open even in its natural state.

FIG. 3 shows a modification of the cylindrical body in the coating device, in which the folded edges 9, 9 of the cylindrical body 1' are
extend horizontally in opposite directions, and sponge-like pads 10, 10 having a rectangular cross section are fixed to the lower surfaces of these folded edges 9, 9. Therefore, when the slit-like opening 3' opens and the coating liquid is discharged from it, the coating liquid will reach the pad 1.
0.0, 10 and can be applied to the surface to be coated from the lower side.

FIGS. 4 to 6 show the second coating device according to the present invention.
Examples are shown, and in these figures, 11 is a cylindrical body, which is integrally molded from synthetic resin with a partially cut-out, approximately circular cross section, and has a coating liquid reservoir 1 inside it.
2, and the circular cross-section notch forms the cylindrical body 1.
1, and this notch forms a slit-like opening 13 that opens above a certain internal pressure. Reference numeral 14 denotes a rigid body made of, for example, an aluminum extrusion and having a substantially horseshoe-shaped cross section, and having approximately the same length as the cylindrical body 11. Inside this body 14, there is a fitting groove 14a into which the cylindrical body 11 is fitted. An outflow guiding opening groove 14b is formed over the entire length of the body 1, and communicates with the fitting groove 14a and projects outward. There is a cylindrical body 1 in the groove 14a.
1 is fitted with its slit-shaped opening 13 facing the outflow guide opening groove 14b and with the opening 13 closed. 15, 15 is rigid body 1
This is a side cover made of an aluminum plate that closes both end surfaces of the body 14, and is formed in a shape corresponding to the cross-sectional outline of the body 14, and is fixed to the body 14. 16 is
This is a stainless steel liquid sending pipe that penetrates one side cover 15 and is inserted into the cylindrical body 11 along its central axis.One end of this pipe 16 is bent and extended as appropriate outside the side cover 15. A handle portion 17 is provided at the tip of the pipe 16, and the other end of the pipe 16 is fixed to the inner surface of the other side cover 15 in a closed state. It has a plurality of coating liquid introduction holes 18 for introducing the coating liquid into the reservoir 12. One end of a connection tube 19 connected to a pressure pump (not shown) is connected to the handle portion 17, and
The coating liquid fed under pressure from the pressure pump is introduced to the handle portion 17 side through this tube 19, passes through an on-off valve (not shown) inside this handle portion 17, and then passes through the liquid feeding pipe 16 to the coating liquid. The liquid is supplied to the coating liquid reservoir 12 through the introduction hole 18 . Reference numeral 20 indicates a rear guide roller provided on the rear side of the body 14 in the coating progress direction (indicated by A in FIG. 5); 21 indicates a front guide piece provided on the front side of the body 14; The rear guide roller 20 strokes the surface of the coating liquid flowing out onto the surface to be coated, and is formed longer than the length of the opening groove 14b for guiding the outflow, and as shown in FIG.
5, 15, and is rotatably attached to a shaft frame 22 attached to both lids 15, 15, and the mounting portion of the shaft frame 22 is provided with an adjustment bolt or nut, etc. A fastener 23 is provided to adjust the mounting angle of the shaft frame 22 as appropriate to set a gap S between the rear guide roller 20 and the surface to be coated of the plate W to be coated, as shown in FIG. This ensures that a coating film of the required thickness (corresponding to S) can be obtained. on the other hand,
As shown in FIG. 5, the front guide piece 21 rolls and guides the surface of the material W to be coated on which a coating film has not yet been formed, and one end thereof is adjusted to the front side of the body 14. It is rotatably attached to the other end of the shaft frame 25 attached via a fastener 24,
This fastener 24 is similar to the fastener 23 described above.

Note that the liquid sending pipe 16 transfers the coating liquid to the coating liquid reservoir 1.
The cylindrical body 11 is supplied to the cylindrical body 11 via the body 14.
It has the role of a means to maintain the

When using the coating device of the second embodiment described above, the valve is opened by operating the opening/closing operation lever 17a of the handle portion 17, and the coating liquid fed from the pressure pump is passed through the liquid feeding pipe 16 into a cylindrical shape. The liquid is supplied to the coating liquid reservoir 12 in the body 11. When the internal pressure of this coating liquid reservoir 12 exceeds a predetermined pressure, the slit-shaped opening 13 opens uniformly over the entire length, and the coating liquid is discharged from this opening 13 into the outflow guide opening groove 14b, where it is discharged. The coating liquid is guided and rectified by the opening groove 14b, and flows out onto the surface of the material W to be coated from the opening end thereof. As the coating liquid flows out, the rigid body 14 is moved forward while holding the handle portion 17 while keeping the gap between the rear guide roller 20 and the surface to be coated constant, thereby forming a desired thickness on the surface to be coated. A coating film will be formed. Further, when the liquid feeding is stopped, the internal pressure of the coating liquid reservoir 12 decreases, the slit-shaped opening 13 is closed, and the coating liquid no longer flows out. According to this coating device,
Since the outflow guiding opening groove 14b is provided on the exit side of the slit opening 13, the flow of the coating liquid flowing out from the slit opening 13 onto the surface to be coated is made more uniform over the entire length of the opening groove 14b. A good coating film can be formed, and since the rear guide roller 20 is provided with an adjustable mounting angle, a coating film of the required thickness can be easily obtained. By adding various notched patterns to the circumferential surface of the roller 20, a corresponding decorative pattern can be formed on the surface of the coating film.

(Effects of the Invention) According to the device of the present invention, the main body held by the holding means is provided with a slit-shaped opening that opens when the internal pressure of the application liquid reservoir inside the main body reaches a certain level, and the slit-shaped opening is Since the coating liquid flows out onto the surface to be coated, the amount of coating liquid flowing out is uniform over the entire length of the slit-shaped opening, preventing uneven coating, blurring, and falling droplets, and ensuring good coating. Can be done. Moreover, since the slit-shaped opening automatically closes when the liquid feeding is stopped, the remaining liquid in the liquid feeding pipe etc. does not leak to the outside. Furthermore, unlike conventional coating roller devices, the device of the present invention is not equipped with a coating roll, and the coating liquid is directly discharged onto the surface to be coated from a slit-shaped opening, thereby preventing clogging. Therefore, maintenance is easy, and since the structure is extremely simple, manufacturing is easy and costs can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional perspective view of a coating device showing a first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line -- in FIG. 1, and FIG. 3 is a modification of the cylindrical body in the device shown in FIG. 4 is a perspective view of a coating device showing a second embodiment, FIG. 5 is a sectional view taken along the line -- in FIG. 4, and FIG. 6 is a sectional view taken along the line -- in FIG. 4. 1... Cylindrical body, 2... Application liquid reservoir, 3... Slit-shaped opening, 4... Reinforcing cover body, 5... Side lid,
7...Retaining rod, 8...Liquid feeding pipe.

Claims (1)

[Claims] 1 A main body that is held by a holding means and has a slit-shaped opening that forms a coating liquid reservoir therein and elastically opens above a certain internal pressure to face the surface to be coated, and supplies the coating liquid to the coating liquid reservoir. A coating device comprising: a coating liquid supply means for the coating;