JP2996181B2 - Fluff dirt removal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing fluff on a screen 3 of a rotary screen coater.

2. Description of the Related Art Conventionally, as shown in FIG. 5, a doctor 7 is installed in contact with a screen 3 of a rotary screen coater to remove fuzz stains on a screen 3, and the fuzz stains attached to the screen 3 are lifted up by the doctor 7. A conventional vacuum nozzle 8 installed below the doctor 7 sucks the water. However, in this conventional apparatus, when a high-viscosity paste is screen-transferred to a brushed fabric as a lower process by a rotary screen coater,
With the passage of time, the screen 3 gradually became clogged with fuzz stains, and eventually became unable to transfer. For this reason, there have been problems such as a decrease in product quality, a decrease in yield, and a decrease in work efficiency due to suspension of temporary transfer and removal of fuzz stains.

[0003]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of reduced product quality, reduced yield and reduced work efficiency, and enables fuzz stains to be continuously transferred to a screen by a rotary screen coater. It is an object to provide a removing device.

[0004]

According to the present invention, a brush roll 2 is provided below a shower pipe 1 of the present invention in contact with a screen 3 of a rotary screen coater, and a vacuum nozzle 4 is provided below the brush roll 2 on the screen 3. The problem is solved by a fluff dirt removing device provided in contact with the device.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A shower pipe 1 according to the present invention is shown in FIG.
The cleaning liquid is supplied to a brush roll 2 provided below the shower pipe 1 as shown in FIG. The shower pipe 1 only needs to be able to supply a predetermined amount of the cleaning liquid that can be uniformly adjusted to the brush roll 2. The cleaning liquid may be water alone, but adding a surfactant or the like is more effective in removing dirt. The amount of the washing liquid is usually 2 to 5 ml / min.

The brush roll 2 of the present invention is provided below the shower pipe 1 in contact with the screen 3 as shown in FIG. The brush roll 2 is obtained by winding a brush 10 or a sponge (not shown) on the surface of a roll 9. Brush 1
As 0, animal hairs such as pigs, raccoons, horses, and the like, and synthetic fibers such as nylon, polypropylene, and Teflon can be used. In actual use, the type, density, brush fiber diameter, etc. are experimentally selected depending on the paste to be transferred. Generally made of polypropylene, density 500-1300 / c
A brush having m ² and a fiber diameter of 0.1 to 0.5 mm is preferable.
If the selection is wrong, the removal of the fuzz dirt becomes incomplete and causes a transfer failure such as generation of vertical stripes. In the case of a sponge, a polyurethane sponge is used, but it is important to provide irregularities on the surface of the sponge in order to properly remove distortion caused by contact with the screen. If the unevenness is not provided, local distortion may cause a transfer failure when distortion is accumulated. Since the speed of the screen surface is generally 10 to 50 m / min, the brush roll has a diameter of 100 to 140 mm and a rotation speed of 100 to 300 r. p. m is preferred. Beyond this range, for example, if the diameter of the brush roll is reduced, the number of rotations must be increased. If the number of rotations is increased, the cleaning liquid may be scattered, which may cause a trouble. If the diameter of the brush roll is increased, it takes time for the vacuum nozzle to suck the applied cleaning liquid, which may adversely affect the paste in the screen. As a result, the quality of the transferred product is deteriorated and the quality is deteriorated.

As shown in FIG. 1, the vacuum nozzle 4 provided below the brush roll 2 in contact with the screen 3 is preferably made of Teflon or polypropylene. The vacuum nozzle 4 of the present invention comprises a doctor 6 with an upper suction hole and a main opening 5 as shown in FIG. The doctor section 6 with the upper suction hole mainly absorbs the cleaning liquid accumulated at the tip of the nozzle, and the main opening section 5 absorbs the fluff dirt together with the cleaning water.
As shown in FIG. 3, the doctor 6 with the upper suction hole has a hole 14 having a diameter of 1.0 to 2.5 mm and a space of 30 to 100 mm.
They are arranged in a line in a row to form a suction hole. If the washing water accumulated in the doctor section 6 with the upper suction hole is left as it is, it enters into the screen 3 and adversely affects the paste. Therefore, the cleaning liquid applied to the screen 3 by the brush roll 2 needs to be removed as quickly as possible. The hole of the doctor 6 with the upper suction hole may be cylindrical or slit-shaped.

The vacuum nozzle 4 has a degree of vacuum of 20 to 30c.
Use at mHg. The cleaning water and fuzz dirt sucked from the doctor 6 with the upper suction hole and the main opening 5 are guided and discharged to the cleaning cyclone air / water separator 11 as shown in FIG. After being removed, the air is exhausted by the exhaust fan 13.

In the present invention, it is preferable that the distance between the surface of the brush roll 2 contacting the screen 3 and the main opening 5 of the vacuum nozzle 4 be short. If it is long, the washing water may enter the inside of the screen 3 and cause a transfer spot.

[0010]

【Example】

Example 1 A shower pipe 1 having a diameter of 27.2 mm and a stainless steel roll 9 having a diameter of 76 mm had a density of 130 on the surface thereof.
0 / cm ² Brush roll 2 provided with polypropylene brush 10 having a length of 30 mm and a fiber diameter of 0.1 mm, a doctor 6 with an upper suction hole having a diameter of 2 mm, a number of 25 and an interval of 50 mm, and a height of 15.4 mm × width A fuzz dirt removing device including a vacuum nozzle 4 having a main opening 5 of 1300 mm as a set is set on a screen 3 having a diameter of 204 mm with a distance between the surface where the brush roll 2 contacts the screen 3 and the main opening 5 of the vacuum nozzle 20 being 20 mm. Washing solution (water containing 0.03% surfactant) is uniformly showered on the brush roll 2 at 3 l / min.
Rotate the vacuum nozzle 4 at 00 rpm
0 cmHg, and a viscosity of 10,000 c.
p acrylic resin was transferred. It was found that the transfer condition was the same as that at the beginning of the transfer even after the continuous transfer for 5 hours, and that this apparatus worked effectively.

[0011]

The fluff dirt removing apparatus of the present invention suctions the cleaning water and the rotation of the brush roll and the timing at which the fuzz dirt swells with the cleaning water, so that the fuzz dirt is completely continuously removed and the cleaning water is removed. Does not enter the inside of the rotary screen coater, so that the transfer can be continuously performed by the rotary screen coater without stopping the transfer in order to remove the fuzz stain.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a fluff dirt removing device of the present invention.

FIG. 2 is a schematic diagram of the tip of a vacuum nozzle of the fluff dirt removing device of the present invention.

FIG. 3 is a schematic view of a hole at a tip end of a vacuum nozzle of the fluff dirt removing device of the present invention.

FIG. 4 is a schematic diagram showing the relationship between the fluff dirt removing device of the present invention and peripheral machines.

FIG. 5 is an explanatory view of a conventional fluff dirt removing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shower pipe 2 Brush roll 3 Screen 4 Vacuum nozzle 5 Main opening 6 Upper opening 7 Doctor 8 Conventional vacuum nozzle 9 Roll 10 Brush 11 Washing cyclone steam separator 12 Steam separator 13 Exhaust fan 14 Upper opening Suction hole provided

Claims (2)

(57) [Claims] 1. A fluff dirt removing device, wherein a brush roll 2 is provided below a shower pipe 1 in contact with a screen 3, and a vacuum nozzle 4 is provided below the brush roll 2 in contact with a screen 3. . 2. The fluff dirt removing device according to claim 1, wherein the vacuum nozzle comprises a doctor having a suction hole and a main opening.