JPH0378150B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is a method of printing on the decorative surface of a workpiece made of a sheet-like material such as a thin metal plate, paper, or synthetic resin.
The present invention relates to an apparatus for forming a decorative surface with an uneven pattern by applying painting and embossing to produce a workpiece with a decorative surface that has a more three-dimensional effect. (Prior Art) Embossing of workpieces such as metal sheets, paper, and synthetic resins is well known. One example is an apparatus for embossing a printed or painted workpiece, such as that disclosed in Japanese Patent Laid-Open No. 53-90347. The decorative surface of the thin metal sheet processed with this type of equipment is embossed with a deep uneven pattern in one step, and the decorative coating film that has already been completed is forced to be embossed before embossing. Cracks and peeling often occurred in the coating film at the bends. In addition, with conventional devices of this type, the required embossing process is completed in one step, so it is not possible to form a decorative surface with multiple steps or a deep embossed surface without cracks.
The appearance was simply an uneven surface, and it was not possible to create a sufficient three-dimensional effect. (Objective of the Invention) The present invention solves the above-mentioned problems by performing multi-stage embossing and printing on the workpiece, and by forming a pattern to enhance the three-dimensional effect on the bent part of the uneven pattern. The decorative coating on the parts does not crack or peel off, or the pattern is deformed due to embossing, and the decorative surface has an uneven pattern that is weather resistant, highly productive, and has a three-dimensional effect. This was invented for the purpose of providing an apparatus for manufacturing workpieces without embossing (hereinafter simply referred to as an embossing apparatus). (Structure of the Invention) In order to achieve this object, the embossing device according to the present invention includes a delivery section on which a workpiece made of a sheet-like material such as a thin metal plate is mounted, and a workpiece that is fed from the delivery section. A loop section that stores the material and always sends it out to the next process without strain, a printing section that directly prints an arbitrary pattern consisting of one color or multiple colors on the surface of the workpiece sent out from the loop section, and In addition to guiding the workpiece sent out from the printing section,
A first shallow embossing process is performed in synchronization with the above pattern, and at the same time, a three-dimensional shape that becomes a shadow on at least all or a part of the bent part, top surface, bottom surface, and side wall of the unfinished uneven pattern formed by the embossing process. A pilot embossing machine that forms a pattern to enhance the three-dimensional effect using one type of paint, ink, etc., and a heater that dries the pattern to enhance the three-dimensional effect applied to the workpiece sent from the pilot embossing machine. An embossing machine that embosses a deeper uneven pattern matching the embossed pattern on the workpiece sent out from the processing machine, a leveler arranged after the above-mentioned processing machine, and a tension pinch roller arranged at the exit of the embossing machine are connected in series. The apparatus is characterized by comprising a synchronization mechanism for synchronizing the printing section, the pilot embossing machine, and the embossing machine. (Function) According to this configuration, the printing unit prints an arbitrary pattern on the decorative surface of the workpiece, and the printed workpiece is guided to the embossing machine by the pilot embossing machine, and the printed workpiece is guided to the embossing machine by the pilot embossing machine. shallowly embossed in accordance with the same pattern, and at least one of the top surface, bottom surface, side wall, and bent portion of the uneven pattern.
Patterns are formed at certain locations to enhance the three-dimensional effect. Next, the workpiece formed in this way is embossed with the same pattern more deeply by an embossing machine to match the above-mentioned shallow uneven pattern, and the workpiece is then embossed with a leveler to create an uneven pattern. The residual strain during processing is reduced by pulling the material under tension with a pinch roller so that the residual strain is removed and the material is flattened without being erased before being sent to the next process. (Example) Next, an example of the embossing device according to the present invention will be described using the drawings. In Fig. 1, 1 is a feeding section, 5 is a loop section, 7 is a pinch roller, 8 is a printing section, 18 is a pilot embossing machine (hereinafter simply referred to as a front embossing machine), 22 is a heater, and 23 is an embossing machine. machine, 26 is a tuning mechanism, 2
7 is a leveler, and 31 is a tensioning pinch roller. To explain further, as shown in FIG .
One type of aluminum plate, copper plate, paper, or synthetic resin is mounted on the uncoiler 3, and this is fed to the next process via the pinch roller 4. Also,
For example, the loop portion 5 is connected to a roller 6 as shown in FIG.
A plurality of the workpieces 2 are arranged so as to be movable up and down to store the workpieces 2, and function as escape parts for constantly and easily sending the workpieces 2 to the next process. Furthermore, the printing section 8 includes a washing machine 9 and a printing machine 1.
0, a top clear coater 11, and a baking oven (not shown) provided as necessary. In particular, the printing press 10 is constructed of one stage or a plurality of stages. The printing unit 8 prints, for example, a printing pattern A as shown in FIG. 4 on the decorative surface of the workpiece 2 in one color or in multiple colors. The printing is performed by any one of gravure printing, offset printing, screen printing, letterpress printing, and planographic printing. Note that printing is performed on any decorative surface. An example of one set of the printing machines 10 is a gravure offset printing machine as shown in FIG.
5, cimesilol 16, and doctor 17. The entire printing section 8 is placed on a frame, and its positional relationship with the front embossing machine 18 is determined.
It can be finely adjusted in 0.1mm increments. Further, as shown in FIG. 6, the front embossing machine 18 guides the workpiece 2 on which the printing pattern A shown in FIG. The uneven pattern of the embossing roll 19 is printed on the printed pattern A on the workpiece 2 through an embossing roll 19 with a pattern engraved on its outer periphery, an elastic roll 20, a plate cylinder 21, a fountain roll (not shown), a doctor, etc. At the same time, embossing is performed shallower than the final embossing depth as shown in FIG.
At least part of the top surface, bottom surface, and bent portion of B′ and C′,
For example, in FIG. 7b, a pattern D for promoting a three-dimensional effect that promotes shading is formed on the bent portion using paint, ink, or the like. Further, the front embossing machine 18 has a mechanism that allows a frame on which this type of roll is attached to be slid vertically and horizontally depending on the position of the workpiece 2. The heater 22 is used to dry or bake the paint etc. of the pattern D for promoting three-dimensional effect applied by the front embossing machine 18 , and in the heated state, the embossing machine 23 performs deeper embossing. It is something. That is, the embossing machine 23 engraves the same pattern as the printed pattern A on the upper and lower male and female embossing rolls 24 and 25 as shown in FIG. The uneven patterns B' and C' are completed as shown in FIG. The printing machine 10, the front embossing machine 18 , and the embossing machine 23 have the same diameter and the same rotation, and are connected to a marking device, a chain, a belt, an electronic control machine, etc. (not shown) in order to avoid discrepancies between patterns. Tuning mechanism 2
It is controlled by 6. Leveler 27
is for correcting residual strain existing in the embossed workpiece 2. As shown in FIG. 10, its configuration includes upper roller groups 28a, 28b, 28c,
...28n, lower roller group 29a, 29b, ...29n
The gap 30 is arranged in a zigzag pattern as shown in the figure, and the gap 30 can be controlled. Reference numeral 31 denotes a tensioning pinch roller which rotates faster than the embossing machine 23, and when the workpiece 2 is being stretched (under tension), the front embossing machine 18 ,
This is to allow the workpiece 2 to pass through the process of the embossing machine 23 to prevent the workpiece 2 from becoming loose and to prevent the uneven patterns B and C from shifting during the embossing process. Next, the operation of the embossing device according to the present invention will be briefly explained. First, the workpiece 2 made of, for example, a primer steel plate is attached to the uncoiler 3 of the delivery section 1 and is fed to the loop section 5 via the pinch roller 4. Ru. At this time, even when the workpiece 2 is pulled by the pinch roller 4, the uncoiler 3 is equipped with a brake device (not shown), so the workpiece 2 is pulled under a certain allowable tension. It is fed to the loop section 5 . Then, the workpiece 2 is transferred from the loop section 5 to the printing section 8 by the pinch roller 7
is sent via. In the printing section 8 , a printing pattern A as shown in Fig. 4 is printed on the surface of the workpiece 2 using ink, and a transparent resin (acrylic resin) is applied thereon as a clear material.After this clear material is dried and baked, The material is fed to the front embossing machine 18 , and at the same time, uneven patterns B' and C' that match the printed pattern A shown in FIG. 4 are formed on the workpiece 2 as shown in FIGS. 7a and 7b. A pattern D for enhancing the three-dimensional effect is attached to the bent portion. In addition, the uneven pattern B′ at this time,
C' is about 80% of the size and depth of the final uneven patterns B and C, so-called ΔW=0.8W, h=0.8H. Also,
ΔW and W are the widths of the top surfaces of the convex patterns C′ and C, and h and H are the embossing depths. Next, the pattern D for promoting the three-dimensional effect is created by the heater 2.
It is dried in step 2 and sent to an embossing machine 23 , where it is embossed with uneven patterns B and C having the final depth as shown in FIG. The workpiece 2 sent out from the embossing machine 23 is moved by a leveler 27 to remove residual strain during embossing by a tensioning pinch roller 3.
1, the sheet is straightened in a stretched state and sent to the next process (not shown). Furthermore, when the force relationship between the pinch roller 7 and the tensioning pinch roller 31 on the workpiece 2 is based on the rotation of the embossing roll, the rotation of the pinch roller 7 is slow;
The tensioning pinch roller 31 is set to rotate at a fast speed to flatten the embossing and uneven patterns B and C without erasing the workpiece 2 while it is being stretched, and remove residual strain. This is how it was done. As a result, the workpiece 2 will not become mountain-like, twist, move, or flap at the entrances of the front embossing machine 18 and the embossing machine 23 within the above-mentioned area, and the pattern will not shift during embossing. This will prevent the image from becoming unclear or being double-clicked. Further, since the leveler 27 is in a state where tension is applied in one direction, it can be easily flattened and residual strain can be easily released. Of course, the tension within the above range is within the range of force that does not change the embossed pattern. Next, a test piece embossed using the above-mentioned apparatus will be compared with a test piece embossed using a conventionally used apparatus. In addition, the inspection method is (1) the apparent number of pekotsuki existing per 1 meter of the workpiece 2, (2)
Observations on the distribution of Pekotsuki, (3) the height difference of Pekotsuki (difference between the designed bottom and top of the uneven surface and the actual bottom and top), and (4) the overall appearance are shown. [Table] (a) Appearance at the bent part of the uneven pattern,
(b) Change in uneven pattern, (c) Three-dimensional effect.
Furthermore, in terms of weather resistance, conventional workpiece materials
Although cracks and blisters were observed in the coating film during the 1500-hour salt water fog test, these were not observed at all when processed using the embossing device according to the present invention. Note that the front embossing machine 18 can also be formed of an iron roll. (Effects of the Invention) According to the embossing device according to the present invention, since the printed pattern and the embossed pattern are processed to match, a three-dimensional effect is enhanced. Since the embossing process is performed in two or more stages, the paint film will not crack or peel off even when deep embossing is performed. Since the embossing process is performed using multiple rolls, it is possible to form a pattern with steep angles. It has little residual distortion and can be easily corrected with a leveler. During embossing, a pattern to enhance the three-dimensional effect can be printed and painted on any part of the uneven pattern, so the three-dimensional effect is greatly enhanced due to the cubic synergistic effect.
Embossing is performed using a machine that arranges the lines in a straight line and does not apply excessive force to the workpiece.
Embossing can be performed smoothly and at high speed. A pattern to enhance the three-dimensional effect is added using the front embossing machine, which is then dried and embossed, so the three-dimensional effect is further enhanced and the pattern does not peel off. Since the embossing process is performed while being stretched between the printing section and the embossing machine using a pinch roller, there is no misalignment between the printed pattern and the uneven pattern. It has the following characteristics.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an example of the structure of an apparatus for forming a decorative surface with an uneven pattern according to the present invention, FIG.
Figures 5, 6, 8, and 10 are explanatory diagrams showing specific examples of each part of the above-mentioned apparatus, Figure 4 is a plan view showing an example of a printed pattern, and Figures 7a and 7b are FIG. 9 is an enlarged end view showing a part of the uneven pattern formed by the pilot embossing machine, and FIG. 9 is an enlarged end view showing a part of the completed uneven pattern. 1 ... Delivery section, 5 ... Loop section, 8 ... Printing section, 18 ... Pilot embossing machine, 23 ...
... Embossing machine, 27 ... Leveler, 31 ... Pinch roller for tension, A ... Print pattern, B, C,
B', C'... uneven pattern, D... pattern to enhance three-dimensional effect.

Claims (1)

[Claims] 1 Workpiece material consisting of a sheet-like material such as a thin metal plate 2
A delivery section 1 equipped with a feed-out section 1, a loop section 5 that stores the workpiece 2 fed from the delivery section 1 and always sends it out to the next process without difficulty, and a workpiece 2 sent out from the loop section 5 . a pinch roller 7 that reliably feeds the material to the next process; a printing unit 8 that directly prints an arbitrary pattern of one color or multiple colors on the surface of the workpiece 2 sent from the pinch roller 7; While guiding the workpiece 2 sent out from the printing section 8 , the first shallow embossing is performed by matching the same uneven pattern as the above-mentioned pattern, and the bent part of the uneven pattern that is not completed during embossing is performed. , a pilot embossing machine 18 that forms a three-dimensional effect enhancing pattern that contributes to shading on at least part of the top surface, bottom surface, and side walls using one type of paint, ink, etc.; Heater 2 that bakes and dries undried paint, ink, etc. on processed material 2
2, an embossing machine 23 for deeply embossing an uneven pattern that matches the embossed pattern on the workpiece 2 sent out from the heater 22; the embossing machine 23 , the pilot embossing machine 18 , and the printing section It is characterized by being composed of a synchronizing mechanism 26 that synchronizes the rotation, the printed pattern, and the uneven pattern, a leveler 27 arranged after the embossing machine 23 , and a tensioning pinch roller 31 disposed at the exit of the leveler 27 . A device that forms a decorative surface with an uneven pattern.