JPS60152335A - Embossing device - Google Patents

Abstract

PURPOSE:To eliminaste a residual distortion, and to form an uneven pattern which is full of a cubic feeling by placing a part between a pinch roller used as a guide, too, and a tensile pinch roller, under a tension state. CONSTITUTION:A coil A from a loop part 4 is fed to a heater 7 through a pinch roller 6 used as a guide, too, in a heater part 5, heated to about 30-60 deg.C, its face film is softened, and it is fed to a pinch roller 8. The pinch roller 6 used as a guide, too functions as a pinch roller until the coil A is guided to the pinch roller 8, and thereafter, operates as a usual guide roller. Next, the coil A fed out of the pinch roller 8 is fed to an embossing roll 9, and an embossing pattern is formed continuously. The coil A fed out of the embossing roll 9 is straightened by a leveler 10 in a state that the residual distortion is drawn by a tensile pinch roller 11, and fed to the next process.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an embossing device for forming irregularities of an arbitrary pattern on a thin metal plate having a decorative coating made of a decorative coating or film.

In general, thin metal sheets, particularly organic coated steel sheets, fluorocarbon resin coated steel sheets, and vinyl chloride steel sheets, are being used for a wide variety of purposes. This is because this type of steel sheet has excellent workability and design, and is also durable. Recently, demand has shifted from the above-mentioned flat steel plates to steel plates with enhanced fashionability by adding a three-dimensional effect, two-tone color, etc. to the surface. As a steel plate compatible with this, for example, a steel plate with an uneven pattern formed by embossing is commercially available.
Rust and peeling of the paint film were observed on the bent portions after ~1000 hours.

In addition, when observing the surface of this type of steel plate under 30x magnification, it can be seen that some of the coating film has peeled off and become wrinkled, scratched, cracked, or thin at the bent areas of concave and convex areas. or cracks were appearing.

In order to eliminate these drawbacks, the present invention softens the steel plate and coating during embossing to exhibit ductility.Furthermore, the residual strain during embossing can be easily corrected to create a beautiful and three-dimensional design. This paper proposes an embossing device that can form a textured, uneven pattern surface and a durable steel plate.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embossing device according to the present invention will be described in detail below using the drawings. FIG. 1 is a schematic configuration diagram showing an example of the above-mentioned device. The upper part shows a thin metal plate feeding section (hereinafter simply referred to as the feeding section), which consists of an uncoiler 2 and a pinch roller 3, and a flat plate wound into a coil. shaped metal sheets (decorative coatings,
Those with makeup tests such as makeup film) Wear A.
This is for constantly and easily feeding the loop part 4.

The loop section 4 controls the speed difference and deviation that occur when transferring the thin metal plate A (hereinafter simply referred to as a coil) after the heater section 5 in the next process by loosening the coil A, and also controls the feeding from above the feeding section. The function is to prevent large shocks from being applied to coil A. The heater section 5 includes a pinch roller 6 that also serves as a guide and a heater 7, and the pinch roller 6 includes upper and lower rollers 6a and 6b.
The coil A is clamped only at the start of the line, and thereafter the coil is fed to the heater 7 as a mere guide roller. In addition, the heater 7 heats the decorative coating of the coil A, essentially the coil A itself, to about 30 to 60°C to soften the decorative coating, and prevents the decorative coating from peeling off from the steel plate during embossing, cracking, scratching, etc. This is to prevent cracks from occurring. The heating method is one of a hot air method, an open flame method, and a hot wire method. 8 is a pinch roller that feeds the coil A to the embossing roll 9 at a predetermined speed and also functions as a brake against movement to the coil during embossing. The embossing roll 9 has a male part with a pattern made of uneven parts formed on its outer circumferential surface, and the upper and lower rolls 9a and 9b are engaged to apply a desired pattern to the coil A, and the gears of the upper and lower rolls 9a and 9b are is determined by the height of the uneven portion and the thickness of the coil A.
an (shown up to 10a3 in the figure), lower roller 10b1
．． 10b2.10b3...10bn (l0b in the figure)
4) are arranged in a zigzag pattern in the order shown in Figure 4), and the gear G between the upper roller group 10a and the lower roller group 10b can be adjusted. Reference numeral 11 denotes a tensioning pinch roller which rotates faster than the rotation of the embossing roll 9 and allows the coil A to pass through the steps of the embossing roll 9 and the reshaping roller 10 while being pulled (under tension).

Next, the operation of the embossing device according to the present invention will be explained. First, the coil 8 mounted on the feeding section is fed to the loop section 4 via the pinch roller 3. In addition, at this time,
Even when the coil A is pulled by the pinch roller 3, the uncoiler 2 is equipped with a brake device (not shown), so the coil A is fed to the loop section 4 under a certain allowable tension. . The coil A is then sent from the loop section 4 to the heater section 5 via the pinch roller 6 which also serves as a guide, and then sent to the heater 7, where it is heated to about 30 to 60°C to soften the decorative film and sent to the pinch roller 8. . In addition,
The pinch roller 6 that also serves as a guide connects the coil 8 to the pinch roller 8.
The coil A is sent out from the pinch roller 8 to the embossing roll 9, and the coil A is sent to the embossing roll 9. For example, an embossed pattern consisting of concave portions B and convex portions C as shown in Fig. 3 is continuously formed. The coil A sent out from the embossing roll 9 is corrected by a reherer 10 to remove residual strain during embossing while being stretched by a tensioning pinch roller 11, and then sent to the next process (not shown). Further, the force relationship between the pinch roller 8 and the tensioning pinch roller 11 with respect to the coil 8 is such that when the rotation of the embossing roll 9 is taken as a reference, the rotation of the pinch roller 8 is slow, and the tensioning pinch roller 11 is Set the rotation speed of 11 to be fast,
Embossing, flattening, and removal of residual strain are performed while the coil 8 is in tension. As a result, the coil 8 may become distorted or twist within the above-mentioned area, and the embossing roll 9 may no longer move around, and the pattern may become blurred due to distortion during embossing. This will prevent you from getting caught. Also, Lehera I
At O, tension is applied in one direction, so that flattening can be easily achieved and residual strain can be easily released. Of course, the tension in the above region is within the range of forces that will not cause any change in the embossed pattern.

Next, the test piece embossed using the machine described above will be compared with the test piece 2, which was embossed using the conventional 2+ machine.

In addition, as for the "Ille", the colored jllj lead iron plate and lead plate plate according to JI 5-G-3312 are t), 271111>
, friend heater 7's 11'! The temperature was varied from lO to 80°C, the embossing depth was (1.9 am, the ratio of Nl1 of the concave part B and the convex part C was l:1, and the embossing speed was 30 m/min). Further, the speed difference between the pinch roller 8 and the tensioning pinch roller 11 was about 3%.

Note that the paint on the coil is an alkyd resin type. Then, when the temperature of the surface of the coil 8, the so-called temperature of the decorative film (painted film in this case), was changed from 0 to 80°C, the peeling of the decorative film, cracks ◎, crank ○, shrinkage ○, and scratches ■. The state is shown in a line graph in FIG. In addition, the flatness and degree of residual strain (
1j Visually observed. In addition,
The inspection method is (apparent number of pekokki existing per 1 meter to 11 coils, (2) distribution state of pekokki, (3) height difference of pekokki (bottom surface of uneven part of installation, (difference between the top surface and the actual bottom surface and top surface), '(41) Observations regarding the overall appearance are shown.

\, Below is the margin \\\, ゝ-Furthermore, the coils formed in the example (coil 8 when the decorative coating was heated to 50°C) and the coil 1 formed in the comparative example were subjected to a salt water fountain test (1500 hours). The subsequent results were as shown in the table below.

What has been described below is only one embodiment of the embossing method according to the present invention.
The temperature of up to 30 to 60°C can be kept at a temperature of about 30 to 60°C, the number of rollers on the rehera can be increased depending on the distribution ratio of the uneven parts B and C, and the distribution can be arranged so that the center force is widened at the ends. You can

As described above, according to the embossing device according to the present invention, there is no change in the force applied to the coil in the embossing zone, and the embossing can be performed under constant tension.
The embossed pattern does not smudge during processing, and a beautiful uneven pattern can be formed. ■It is possible to heat the cosmetic film to make it compatible with enhos processing.It is possible to form a beautiful cosmetic film that is soft and does not cause scratches or cracks, and has excellent weather resistance, scratch resistance, and chemical resistance. ■The residual strain caused by the distortion formed by enhos processing can be easily and sufficiently removed by flattening under tension, making it possible to form an uneven pattern with no distortion and full of three-dimensional effect. . ■The lines are arranged in a straight line and the mechanism does not apply excessive force to the coil, allowing for smooth embossing. ■Since the coil is heated and embossed, it is not affected by the environment. ■The straight line allows for high-speed embossing. It has the following characteristics.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an example of an embossing device according to the present invention, FIG. 2 is a perspective view partially showing a leveler that is a part of the embossing device, FIG. 3 is a perspective view showing an example of a rainbow boss pattern, and FIG. FIG. 4 is a characteristic diagram showing the temperature of the decorative film and the occurrence of cracks, etc. l...Thin metal plate delivery section, 5...Heater section, 9...
Emboss roll, l (]...Rehera, 11...Pinch roller for tension, Δ...Thin metal plate. Patent applicant: IC Technology Institute Co., Ltd. ::)(
A: ; ) )) Door j1 %z Figure 3 Figure 4

Claims (1)

[Claims] il+ In an apparatus for embossing a coiled thin metal sheet having a decorative coating, there is a thin metal sheet feeding section consisting of an uncoiler and a pinch roller for feeding the thin metal sheet, and a thin metal sheet fed from the feeding section. a pinch roller that also serves as a guide placed after the heater section, an embossing roll that applies an arbitrary uneven pattern to the thin metal sheet sent out from the first cola, a refiller placed after the roll, and a An embossing device characterized in that tension pinch rollers disposed at the exit of the leveler are arranged in a straight line, and tension is maintained between the pin 10-ra that also serves as a guide and the tension pinch roller. .