JPS6046241A - Production unit for colored zinc iron plate on which embossed pattern is formed - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for manufacturing a colored galvanized iron plate with an embossed pattern (hereinafter simply referred to as an embossed iron plate) for use in construction boards.

Metal plates are smooth and lack a three-dimensional or natural feel. To improve this, for example, the surface is coated with ricin, embossed to create an uneven pattern, mastic coated, etc. In particular, in order to create a three-dimensional, natural feel by embossing a colored galvanized iron plate, a commercially available product was attached to an uncoiler, and then guided to an embossing roll via a pinch roller, where it was embossed with an uneven pattern. In other words, the 2-coat, 2-bake colored galvanized iron sheet production apparatus does not have a device for embossing during production. When a colored galvanized iron plate is embossed, the coating film on the galvanized iron plate cannot follow the deformation at the bent parts of the uneven pattern during embossing, resulting in the coating film cracking or peeling. However, there were drawbacks such as corrosion of the galvanized iron plate from the crank part.

In order to eliminate these drawbacks, the present invention forms an uneven pattern on the galvanized iron plate using an embossing roll before forming the top coat in the production line for colored galvanized iron plates, thereby improving weather resistance, workability, and productivity. The present invention proposes an embossed iron plate manufacturing device that can be mass-produced at low cost.

EMBODIMENT OF THE INVENTION Below, the manufacturing apparatus of the embossed iron plate based on this invention is demonstrated in detail using drawing. FIG. 1 is an explanatory diagram showing an embossed iron plate manufacturing apparatus according to the present invention. In the figure, 1 is an uncoiler, and 2 is a thick galvanized iron plate wound into a coil. Reference numeral 3 denotes an entry side looper, and 4 a pretreatment section which has the function of forming a chemical conversion film on the coating surface by dipping or spraying in order to coat the galvanized iron plate 2. Reference numeral 5 is for applying an undercoat to the front and back surfaces of the galvanized iron plate that has been embossed with an undercoat coating machine, and 6 is for baking the paint applied by the undercoat coating machine 5 in a baking oven. be.

1 is an embossing roll consisting of a male type and a female type roll 8.9, and in order to add three-dimensionality and luxury to the thick plate, for example, a concave pattern A and a convex pattern B as shown in Fig. 2 are continuously formed. The height difference between the uneven patterns A and B is approximately 0.
It is 1st to 5th place. In addition, uneven patterns A and B include circles, 3
Patterns are known by names such as square, oval, rod, citron, dolomet, crater, cast, chip, trapachine, stucco, and dot, and their names are unknown. It consists of one type of pattern, etc.

Reference numeral 10 is a top coater for applying a top coat to the surface of the galvanized iron plate, and 11 is a baking oven for baking the top coat. 12 is embossed with coiler and covered with top and bottom coatings, so-called 2-coat 2
This is for winding baked colored galvanized iron sheets into coils.

Next, the operation of the embossed iron plate manufacturing apparatus according to the present invention will be explained. Note that most of the well-known pinch rollers, shears, stitches, etc. will not be explained or described. Therefore, as shown in FIG. 1, a galvanized iron plate (thickness: 0.27) wound into a coil is attached to the uncoiler 1, and is fed to the inlet louver o3 via a pinch roller indicated by a dotted line. Entrance side louver 3
The galvanized iron plate 2 that comes out of the process passes through a pretreatment section 4 and is sent to an undercoat coating station A5.
will be sent to The undercoat coating machine 5 applied, for example, an epoxy resin-based undercoat to the front and back surfaces of the galvanized iron plate 2, and passed through the baking oven 6 to form an undercoat film of 10 microns. Next, this galvanized iron plate 2 is fed to an embossing roll 1, and the embossing roll 1 creates an uneven pattern (depth 0.9 mm) on the galvanized iron plate as shown in Fig. 2.
was formed. Next, a white top coat made of, for example, polyester resin is applied to one side of the galvanized iron plate 2, which has been embossed with an uneven pattern using an embossing roll 1, using a top coat coating machine 10, and then sent to a baking furnace 11. A top coat film with a film thickness of 10 microns is formed, and this is applied to the coiler 1.
2, and the production of the embossed iron plate was completed. As shown in FIG. 3, the embossed iron plate manufactured in this manner has a cross section in which upper and lower coating films C1D are formed on the front and back surfaces of the galvanized iron plate 1. In addition, the corrosion resistance (salt water spray test JIS-Z-23711000 hours) of the embossed iron plate manufactured by the embossed iron plate manufacturing apparatus according to the present invention was evaluated by comparing the appearance with a conventional commercially available colored zinc iron plate with the same pattern and depth as above. When compared with a sample embossed with an embossing roll, the following results were obtained. That is, in the salt spray test, the embossed iron plate manufactured in the example had no cracks in the coating, and no whitening or red rust was observed.
Moreover, the contrast between the uneven patterns A and B became clear, and the three-dimensional effect was enhanced. On the other hand, in the colored galvanized iron sheet of the comparative example, the paint film on the decorative surface had cracks at the bent parts of the uneven pattern, and part of the paint film had peeled off from the galvanized iron sheet.
Red rust had formed on the bent portions after 72 hours. In addition, since the appearance was simply a concavo-convex pattern, the three-dimensional effect appeared to be inferior to that of the example.

As described above, according to the embossed iron plate manufacturing apparatus according to the present invention, an arbitrary pattern is embossed on a galvanized iron plate, and then two layers of coating film are individually baked, so that the crank of the coating film is formed at the bent part of the uneven pattern. It is characterized by being able to produce embossed iron plates with excellent corrosion resistance without the occurrence of corrosion. Also,
Since the coating film is formed once after embossing, the uneven pattern affects the coating thickness, which contributes to enhancing the three-dimensional effect, making it possible to produce embossed iron plates with a beautiful three-dimensional appearance. . Furthermore, in order to manufacture embossed iron plates, it is only necessary to incorporate an emboss roll into a line currently in operation, which is advantageous in that it is inexpensive.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an example of a manufacturing apparatus for a colored galvanized iron sheet without an embossed pattern according to the present invention, and FIGS. 2 and 3 are a perspective view and an end view of an example of the embossed pattern. 1... Uncoiler, 2... Galvanized iron plate, 4... Pretreatment section, 5... Undercoat applicator, 6.11... Baking furnace,
? -... Embossing roll, 10... Top coating machine.

Claims (1)

[Claims] (11) An uncoiler for mounting a galvanized iron plate wound into a coil, an inlet looper for storing the galvanized iron plate sent out from the uncoiler, a pretreatment section for pretreating the galvanized iron plate supplied from the louver, A roll coater-type undercoat applicator that applies an undercoat coating to a pretreated galvanized iron sheet, a baking furnace that bakes the paint on the galvanized iron sheet with the undercoat film sent from the applicator, and a baking furnace that bakes the paint sent out from the baking furnace. An embossing roll that embosses an uneven pattern on a galvanized iron plate, a top coating machine that applies a top coat only to one surface of the galvanized iron plate sent out from the roll, and a top coat paint that bakes the top coat of the galvanized iron plate sent out from the coater. An apparatus for manufacturing a colored galvanized iron sheet with an embossed pattern, characterized in that a baking furnace and a coiler for winding up the colored galvanized iron sheet sent from the baking furnace are arranged in series.