JPS605351B2 - How to paint the sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sheet coating method, and more particularly to a sheet coating method that avoids the formation of enamel hair.

Generally, the inner and outer surfaces of vertically packed moths are coated with anti-corrosion copings, but when manufacturing such moths, as shown in Fig. ,3b
A blank 2 with a coating film 4 formed on the central part is prepared, and the blank 2 is curled and both ends 3a and 3b are overlapped and fixed to form a porosis 1 as shown in FIG.

When manufacturing such a blank 2, as shown in FIG. 3, a coating film 4' is formed continuously in the feeding direction on a sheet 5 made of a metal material, and the coating film 4' is baked and solidified. After that, the sheet with the coating film adhered thereto is cut by a slitter at the cutting point 6 to obtain the blank 2 shown in FIG.

However, during this cutting, the paint film on the cut surface is cut out and becomes hair-like, resulting in so-called enamel hair.
There is a possibility that this may adhere to the blank 2 and be mixed into the manufactured day-of-the-day products, and improvement of this problem is desired. This invention has been made in view of the above circumstances, and an object of the present invention is to provide a sheet coating method that can avoid the generation of enamel hair even when a blank is cut from the sheet with a slitter. It is. Corresponding to this purpose, the sheet coating method of the present invention includes forming a coating film over a plurality of blanks and the cut portion of a sheet that includes a plurality of blanks continuous in the feeding direction via the cut portion,
After that, the coating film at the cut portion is removed before solidification or the coating thickness is reduced.

The details of this invention will be explained below with reference to one embodiment. Fourth
In the figure, 11 is a sheet of material from which a plurality of planks 2 are to be cut out.

A plurality of such planks 2 are arranged in succession along the sheet feeding direction a with the imaginary cutting line 13 as a boundary. Fourth
Although the sheet 11 shown in the figure has two consecutive rows of such blanks 2, there may be one or more rows.

First, while feeding the sheet 11 in the direction of arrow a,
The entire surface is coated to form a coating thickness 14. however,
Since both end portions 3a and 3b of the blank 2 will be overlapped portions during cylinder manufacturing, they are not coated for this reason. Such coating can be performed using a coating device 15 as shown in FIG.

That is, the coating apparatus includes a composition roll 16 and a feed roll 17 that are located vertically opposite each other, and the sheet 11 is passed between them. The feed roll 17 contacts the sheet 11 and feeds the sheet 11,
The composition roll 16 transfers the paint adhering to its surface to the sheet 11 at the contact portion with the sheet 11 to perform coating. composition roll 16
The paint is supplied by a supply roll 18. Paint is supplied from nozzle 19. After the coating process described above, the sheet coated on the entire surface of the row 14 of blanks 2 is then sent to a wiping process, where the coating is drawn along the cutting line as shown in Figure 6 while the coating is still wet. The coating film 21 is removed along the cutting line 13a or the thickness of the coating film is reduced so that as shown in FIG. A sheet 11 is obtained in which blanks 2 in which no coating film 21 is present are continuous.

In this case, the coating film 2 is applied to the part along the cutting line 13a of the surrounding green part.
Even if No. 1 is not present, there is no problem in terms of resistance to contents since this portion becomes the top-bottom lid-wrapped cotton portion. Such a coating film can be wiped off using a wiping device 22 as shown in FIG.

That is, the wiping device 22 includes a wiping roll 23 and a feed roll 24. The feed roll 24 is located below and contacts the sheet 11 to feed it. The wiping roll 23 is rotatable around an axis 25 parallel to the feed roll 24, and has a virtual cylindrical surface 2 in contact with the sheet 11.
6 or a plurality of protrusions 28 having a top surface 27 corresponding to
It is equipped with The protrusion 28 may be made of rubber having a hardness of 60, for example, and is positioned parallel to the shaft 25 so that it can contact only a portion of the sheet 11 along the cutting line 13a. Therefore, for example, when there is one protrusion 28, the length of the cylindrical surface 26 is equal to the interval between two adjacent cutting lines 13a, and when there are a plurality of protrusions 28, the pitch along the cylindrical surface 26 is equal to the distance between the two adjacent cutting lines 13a. The distance is equal to the distance between two adjacent cutting lines 13a. When using such a wiping roll 24, the top surface 27 of the protrusion 28 comes into contact with the sheet 11, and the sheet 1
The undried coating film along the cutting line 13a of No. 1 is wiped off with the top surface 27 of the protrusion 28, or is pushed out by being pressed by the top surface 27 of the protrusion 28, and by these actions, the coating film along the cutting line 13a is removed. The coating on the area is removed or its thickness is reduced as shown in FIG. Top surface 27 of protrusion 28
The paint adhering to the top surface 27 is transferred to the scraper roll 29 that contacts the top surface 27, and is then scraped off by the scraper blade 31, after which it is washed away by the solvent supplied from the nozzle 32 and stored in the storage tank 33. be done. The sheet 11 comprising a series of blanks 2 in which a coating film is formed only in the center part except for the peripheral part along the cutting line 13a is carried to the next drying process, where the coating film is dried and finally Cut along the cutting line 13a with a slitter (not shown) (if there are multiple rows 14, cut along the cutting line 13b and then cut along the cutting line 13a), as shown in FIG. Obtain the desired blank 2. When the blank 2 thus obtained is cut from the sheet 11, it is cut at a cut portion where the paint film is removed or the thickness of the paint is reduced, so enamel hair occurs. Therefore, when a dancing body as shown in FIG. 2 is molded, there is no risk of foreign matter getting mixed into the interior.

As is clear from the above description, according to the present invention, it is possible to obtain a sheet coating method that can easily and reliably avoid the occurrence of enamel hair.

[Brief explanation of drawings]

Fig. 1 is a plan view showing a conventional blank, Fig. 2 is a perspective view showing a bonito arm, Fig. 3 is a plan view showing a conventional sheet, and Fig. 4 is a plan view showing a conventional sheet.
5 is a plan view showing a sheet coated by the method of the present invention, FIG. 5 is an explanatory diagram showing the configuration of a coating device, FIG. FIG. 7 is a plan view showing the sheet from which the coating film at the cut portion has been removed, and FIG. 8 is a configuration explanatory diagram showing the wiping device.
and FIG. 9 are plan views showing a blank obtained by the coating method of the present invention. 2...Blank, 11...Sheet, 13a...Cutting line (
Curtain), i3b... Cutting line (vertical), 15... Coating device, 22... Wiping device. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9

Claims (1)

[Scope of Claims] 1. Forming a coating film over the plurality of blanks and the cut portion of a sheet provided with a plurality of blanks continuous in the feeding direction via the cut portion, and then forming the coating film at the cut portion. A method for coating a sheet, characterized by removing or reducing the thickness of the coating film before solidification. 2 The coating film is formed by a roll coater, and the coating film is removed or the coating thickness is reduced by bringing a member that can come into contact with and separating from the cut portion into contact with the cut portion to wipe off the coating film at the cut portion. 2. The sheet coating method according to claim 1, wherein the coating method is carried out by pressing or removing the coating film.