JPH0671210A - Dust collector device for roll coater - Google Patents

Abstract

PURPOSE:To prevent sticking of foreign matters to a strip to be coated and to enable manufacture of a beautiful strip product without a coating defect. CONSTITUTION:In a dust collector device for a roll coater, a dry nonelectrostatic charging brush 31 brushing a strip surface is arranged just front of the roll coater 23, and a dust collector hood 32 collecting the foreign matter removed by the brush 31 is arranged around the brush 31.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust remover for roll coaters.

[0002]

2. Description of the Related Art In a continuous strip coating line, if foreign matter adheres to the surface of a strip to be coated, a coating defect occurs after coating with a roll coater. Therefore, in general, the strip to be coated is introduced into the roll coater after pretreatment such as degreasing and chemical conversion treatment, washing with water and drying for cleaning. Also, you can cover the entire line with a dustproof tent,
The coater room is made into a dust-proof room to prevent the falling dust from adhering to the strip to be coated.

[0003]

However, in the coating line, however, even if the cleaning measures and the dust fall measures as described above are adopted, the fact that foreign matter adheres to the strip to be coated is not completely eliminated.

Further, when the line is stopped for repairing the line or changing the product type, etc., dust adheres to the dummy coil (passing plate material) in the line and rolls at various points in the line. Will be polluted. Therefore, there is a high frequency of occurrence of coating defects due to the adhesion of foreign matter on the coating surface of the strip immediately after the restart of the line.

An object of the present invention is to prevent foreign matter from adhering to a strip to be coated and to manufacture a beautiful strip product having no coating defects.

[0006]

SUMMARY OF THE INVENTION The present invention is a dust remover for a roll coater, which is installed at the entrance side of a roll coater and removes foreign matter adhering to the strip surface, by rolling a soft non-charged brush for brushing the strip surface. A dust collecting hood, which is installed immediately before the coater and collects foreign matters removed by the brush, is installed around the brush.

[0007]

[Function] The foreign matter is removed from the coated strip by a dry brush immediately before the roll coater. Then, the removed foreign matter is collected by the dust collecting hood and discharged to the outside of the system.

By making the brush an uncharged brush, it is possible to prevent the foreign matter removed from the strip to be coated by the brush from re-adhering to the brush.

Due to the above, it is possible to prevent foreign matter from adhering to the strip to be coated and to manufacture a beautiful strip product without coating defects.

[0010]

1 is a schematic view showing an embodiment of the present invention, FIG.
Is a schematic diagram showing an uncharged brush, FIG. 3 is a schematic diagram showing a static electricity removing device, and FIG. 4 is a schematic diagram showing a continuous coating line.

The continuous coating line, as shown in FIG.
And the strip 1 unwound from the second unwinder 11, 12.
0 is continuously connected through a welder 13 and passed through an entrance looper 14 to be pretreated in a degreasing section 15 and a chemical conversion treatment section 17 and then cleaned by washing with water and drying. The cleaned strip 10 is coated and baked by the first roll coater 21, the first oven 22, the second roll coater 23, and the second oven 24.
After passing through the exit side looper 25, the inspection section 27, and the shear 28, it is wound up by the winder 29.

However, in this embodiment, as shown in FIG.
A dust collector 30 for removing foreign matter adhering to the upper and lower surfaces of the strip 10 is installed in the immediate vicinity of the respective entrance sides of the first and second roll coaters 21 and 23. Here, the “nearest” that the dust collecting device 30 makes on the entrance side of each roll coater 21, 23.
Is a range within which the arrangement of the device is established, and is as close as possible, for example, a range of 1 to 2 m. Although FIG. 1 shows the dust collector 30 installed on the inlet side of the second roll coater 23, a similar dust collector 30 is also installed on the inlet side of the first roll coater 21.

The dust collector 30 is provided with a dry roll-type non-charging brush 31 for brushing the surface of the strip 10 immediately before the roll coater 23, and a dust collecting hood 32 for collecting foreign matters removed by the brush 31. It is installed around the brush 31. The brush 31 is, as shown in FIG.
A synthetic resin wire 31A (wire diameter is 0.1 mm, for example) is coated with an antistatic agent coating film 31B (coating thickness is, for example,
0.05mm) can be used.

Further, the dust collector 30 includes a static electricity removing device 33 for removing static electricity charged on the surface of the strip 10 (including the coating surface after being subjected to the undercoat treatment by the first roll coater 21). It is installed on the downstream side. As shown in FIG. 3, the static electricity removing device 33 employs a device that neutralizes positive and negative charges on the surface of the strip 10 by corona discharge of the discharge needle 33A to which a high voltage (for example, 70,000 V) is applied. it can.

The operation of this embodiment will be described below. Foreign matter is removed from the strip 10 to be coated by a dry brush 31 immediately before the roll coaters 21 and 23. Then, the removed foreign matter is collected by the dust collecting hood 32 and discharged to the outside of the system.

By making the brush 31 a non-charged brush, it is possible to prevent the foreign matter removed from the strip 10 to be coated by the brush 31 from reattaching to the brush 31.

Since the static electricity removing device 33 is installed on the downstream side of the brush 31, static electricity is charged on the surface of the strip 10 (including the coated surface after the base coating of the strip 10) after the foreign matter is removed by the brush 31. Prevents reattachment of dust.

Due to the above items, the coating strip 1
It is possible to prevent foreign matter from adhering to 0 and produce a beautiful strip product without coating defects.

[0019]

As described above, according to the present invention, it is possible to prevent foreign matter from adhering to the strip to be coated and to manufacture a beautiful strip product without coating defects.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of the present invention.

FIG. 2 is a schematic view showing an uncharged brush.

FIG. 3 is a schematic view showing a static electricity removing device.

FIG. 4 is a schematic diagram showing a continuous coating line.

[Explanation of symbols]

 10 Strips 21 and 23 Roll coater 30 Dust collector 31 Brush 32 Dust hood 33 Static eliminator

Claims (1)

[Claims] 1. A dust remover for a roll coater, which is installed on the entrance side of a roll coater and removes foreign matter adhering to the strip surface, is provided with a soft non-charging brush for brushing the strip surface immediately before the roll coater. A dust remover for a roll coater, characterized in that a dust collecting hood for collecting foreign matters removed by a brush is installed around the brush.