KR100251810B1 - Production method and the device for corrugated cardboard box - Google Patents

Abstract

PURPOSE: A high-strength-corrugated-cardboard box and a manufacturing method thereof are provided to have a clearly printed face as to contribute to security of strength quality and raw cost saving by preventing decrease of compression intensity during processing a box and with excellent workability. CONSTITUTION: A high strength corrugated cardboard is produced by manufacturing a cylinder(10) and polishing a surface. Copper plating is applied thereon and surface processing is performed. A printed part is carved into a V-shaped section. On one side of a corrugated cardboard liner(50), a surface printing is applied in a concave-plate-printing method using a copper plate. The printed corrugated cardboard liner is supplied to a crease getter with a core material for wave usage to manufacture corrugated cardboard raw fabric. The cardboard fabric is cut in an outer form of a box and processed with Tomsoning for constituting a folding part. The folding part is then bent and both free ends of the fabric are sewn to complete the box. The copper plate is processed in such a manner to have a section depth of 35¯45.

Description

High strength corrugated cardboard box manufacturing method having clear printing part and apparatus therefor

The present invention relates to a high-strength cardboard box having a clear printing, in particular

A method of manufacturing a high-strength corrugated cardboard box with a vivid printing surface that enables excellent color reproduction, as well as a reduction in compressive strength caused by bone crushing during box processing, thereby contributing to the guarantee of strength quality and cost reduction. To the device.

In general, a packaging box is a paper box manufactured to package a non-shockable item, such as clothing or confectionery, using a single plate material that maintains a certain strength, and a cushioning core is inserted between a pair of corrugated liners. It is divided into a cardboard box manufactured to secure the package from the shock caused during transportation or storage by securing the space inside.

Such boxes are used for surface printing in various forms in relation to the types of goods packaged in the boxes, and such surface printing was only possible in a limited form depending on the type of packaging material.

In other words, in the case of confectionery packaging boxes made of generally smooth cardboard such as manila cardboard (SC cardboard), the surface is relatively smooth, so that various printing methods available can be used to maintain the best printing state. In order to ensure that the offset (OFF SET) printing method is widely used. However, in the case of the corrugated cardboard box made of corrugated paper, the corrugated cardboard with the surface is very rough and the corrugated liner which maintains the wave of a constant height is formed between the corrugated liners provided as a pair of upper and lower sides, thereby increasing the printing pressure (nip pressure) excessively. In this case, the compressive strength is greatly reduced, leading to a loss of durability.

Therefore, the corrugated cardboard box is satisfied with the degree of simple display of the contents in the printing state with low dot dots through the flexo printing method and the like, but it has been known that high-quality printing is practically impossible.

This is because, in case of offset printing on the corrugated paper, printing skip occurs due to surface unevenness due to the characteristics of the paper during printing.

That is, in the case of printing by flexographic method on the finished corrugated paper, the manufacturing process and cost are low, and it has the advantage of easy production of small quantities of various kinds, but with the problem that the compressive strength decreases due to the printing pressure during printing. In addition, the printing condition is not only low dots of about 60 to 80 lines (dots), but also has a problem of significantly lowering the merchandise due to work reasons, such as bone marks on the surface during the fabric production process.

Therefore, in packaging small quantities of high-quality products such as specialty products, a separate manila cardboard (SC cardboard) printed by an offset printing method is laminated on the surface of the corrugated cardboard liner to cut, thomson, and suture process. Sometimes through a box to make. However, the box manufactured by this method also has the advantage that it can maintain the best printing state because it has a dot dot corresponding to 160 to 180 lines, while the printed separate paper is laminated on one side of the corrugated liner. The process is difficult, such as the need to precede the process, the multi-process production method increases the production time and cost, while the automation of the production is impossible, and further showed a significant problem that causes the automatic packaging of the product.

The present invention has been proposed to solve the above problems, and does not laminate a separate manila cardboard (SC cardboard) on the surface of the corrugated liner, but improves the offset printing similar effect through the improvement of the printing plate structure and printing method. By providing, the main purpose is to provide a packaging color box in which manufacturing costs are significantly reduced and print quality is greatly improved.

The present invention also provides a high-strength corrugated cardboard box having a vivid printing surface and a method of manufacturing the same, which is excellent in workability and prevents a decrease in compressive strength during box processing, thereby greatly contributing to quality assurance and cost reduction. Is there.

1 is a process schematic diagram illustrating a cardboard box forming process of the present invention

Figure 2 is a configuration diagram of the electrostatic load device for printing ink transition of the present invention

Figure 3 is a printing plate ink transition state before using the electrostatic load device

Figure 4 is a printing plate ink transition state in the state using an electrostatic load device

※ Explanation of code about main part of drawing ※

10 cylinder (copper plate) 11 ink insertion groove 20 tank

21: printing ink 30: pressure roller 31: rubber coating layer

40: static electricity generating device 41: fiber braid 50: corrugated liner

51: bend

On the other hand, the present invention for effectively achieving the above object, the process of manufacturing the cylinder, the process of polishing the surface, and after copper plating, the process of the surface again and the engraving of the printed portion in the V-shaped cross section A cylinder is manufactured through a series of processes; Performing surface printing on the selected surface of the corrugated cardboard liner by concave plate printing using the manufactured copper plate; Supplying the printed corrugated liner with corrugated corrugated material for wave to produce corrugated fabric; Cutting the manufactured cardboard fabric into the shape of a box and simultaneously forming a folded portion by thomson; Bending the folded portion of the cut cardboard fabric, characterized in that to complete the box by sewing both free ends of the fabric.

The present invention is a cylindrical copper plate made of a V-shaped cross-section, made of a concave plate to be processed to maintain a depth of 35 ~ 45㎲ to improve the ink transfer degree; Ink supply means which is positioned in a state where a part of the bottom surface of the copper plate is impregnated so that a predetermined amount of ink is always supplied to the copper plate; A pressure roller installed at an upper side of the copper plate to pressurize the corrugated cardboard liner guided to the copper plate so as to transfer ink; And, the static electricity generating device attached to the pressure roller; It is made of.

The copper plate is made of a concave plate made of a V-shaped cross section on the cylinder and processed to maintain a depth of 35 to 45 mm 3 so that the ink transfer degree is improved, and the number of dots applied to the copper plate is 120. It is preferable to print within the range of ˜175 lines.

As the ink to be printed on the surface of the corrugated liner, an environmentally friendly solution is used as a solution in which 30 to 40% of a pigment resin, 40% of methyl alcohol, and 30% of isopropyl alcohol, or an aqueous coating is used. The maleic acid resin is added to increase heat resistance and wear resistance.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a process schematic diagram illustrating a cardboard box forming process of the present invention, Figure 2 is a configuration diagram of the electrostatic load device for printing ink transfer of the present invention, Figures 3 and 4 are respectively The print plate ink transition state before use and with the electrostatic load device is shown.

In the present invention, the copper plate 10 used for printing the corrugated cardboard box, the process of manufacturing the cylinder, the process of polishing the surface, and after copper plating, and then the process of polishing again and engraving the printed part Through a series of processes to form an ink insertion groove 11 consisting of a V-shaped cross section on the surface of the cylinder (10).

When the ink insertion groove 11 processed on the surface of the cylinder 10 is formed by corrosion, the depth of adjustment is approximately 30 to 35 mm, which is inaccurately adjusted, and thus the primary color reproduction (especially the gradation part) is not performed properly. It was found that printing on boxed papers with poor smoothness was not possible at all.

Therefore, the present invention is to ensure the stability of the ink fixing by maintaining the depth of the ink insertion groove 11 to 35 ~ 45㎲ through the engraving, the cross section of the groove portion 11 to be carved also made of a concave plate By forming the structure of the ink, the ink transfer degree is further improved, and the selection range of the printable paper is also increased.

The number of dot dots applied to the copper plate is preferably printed within the range of 120 to 175 lines in consideration of the smoothness of the surface. In other words, as the surface smoothness is extremely bad, a lower player is used to print. This is because the ink may be entangled when the player is raised excessively even though the smoothness is poor.

Such a cylinder 10 (copper plate) is to be located in the state impregnated in the tank 20 in which the printing ink 21 is contained, and the upper side of the cylinder (coil plate) is a pressure roller (coating a rubber film layer 31 on the surface) 30) is installed.

However, since the corrugated paper is to cause the printing skip (Dot skip) phenomenon due to the surface unevenness due to the nature of the paper during printing may significantly reduce the printing effect. In other words, the ink 21 in the ink insertion groove 11 engraved on the cylinder 10 is concave into the ink insertion groove 11 as shown in Fig. 3A due to the surface tension of the ink. In the case of film printing, the surface of the film is relatively even compared with the paper and there is a little static electricity, so that the ink is generally smoothly transferred to the film, whereas the corrugated liner 50 has a rough surface. This prevents a uniform transition as a whole. This phenomenon is not solved even if the printing pressure (nip pressure) is raised, as shown in (b) of FIG. 3 due to the separation distance between the corrugated liner 50 and the ink 21. .

The present inventor applied the electrostatic induction generated on the surface of the film to the cardboard liner 50 as a way to effectively block this phenomenon. In order to overcome the above problems by sucking the printing ink 21 of the engraving groove 11 processed in the cylinder (copper plate) (10).

As a solution, an electrostatic generator 40 is attached to the pressure roller 30 on which the rubber film layer 31 is applied.

The static electricity generating device 40 has a fiber blade 41 placed in the longitudinal direction in the pressure roller 30, the electricity of the low voltage low current is transmitted to the rubber pressure roller 30, the cylinder It is configured to induce low voltage electricity on the corrugated liner 50 supplied between the 10 and the pressure roller (30).

Therefore, the ink 21 of the groove 11 carved on the cylinder 10 will rise to the top of the engraving groove 11 as shown in Fig. 4A, which is As shown in Fig. 1), it is transferred to the bent portion 51 of the irregular bottom surface of the corrugated liner 50 and sufficiently adhered to maintain a good printing state.

The colorless coating agent is applied to the surface of the corrugated liner surface printed through the above process, and the colorless coating liquid applying means provided to apply the colorless coating agent on the surface of the printed corrugated liner is impregnated with the coating liquid 61. Cylindrical roller 60 is used, which can be usefully used to provide a moisture proof effect of the box while preventing bleeding and scratching of the ink during the gating operation.

Then, the corrugated cardboard liner printed as described above is supplied to the corrugator along with the second corrugated cardboard liner and the corrugated material for wave formation to produce a corrugated cardboard fabric.

Corrugated fabric thus produced is also a process of cutting to the desired box shape in accordance with a conventional box manufacturing process, the process of forming a fold by thomson (Tomson), and bending the folded portion of the cut cardboard fabric In order to provide a color box having excellent color reproduction required by the present invention, a series of processes of closing the free ends of the fabric to complete the box are sequentially performed.

As described in detail through the above embodiments, surface printing is performed on a selected surface of the corrugated liner by concave plate printing; Supplying the printed corrugated liner with corrugated corrugated material for wave to produce corrugated fabric; Cutting the manufactured cardboard fabric into the shape of a box and simultaneously forming a folded portion by thomson; According to the present invention by bending the folded portion of the cut cardboard fabric, and sewing both free ends of the fabric, excellent color reproduction is possible, as well as preventing a decrease in compressive strength caused by bone crushing during box processing. This provides an effect that can greatly contribute to the strength quality and cost reduction.

Claims (14)

Producing a cylinder through a process of fabricating the cylinder, polishing the surface thereof, copper plating, and then subjecting the surface to a process of engraving the printed portion into a V-shaped cross section; Performing surface printing on the selected surface of the corrugated cardboard liner by concave plate printing using the manufactured copper plate; Supplying the printed corrugated liner with corrugated corrugated material for wave to produce corrugated fabric; Cutting the manufactured cardboard fabric into the shape of a box and simultaneously forming a folded portion by thomson; Bending the folded portion of the cut cardboard fabric, and stitching both free ends of the fabric to complete the box characterized in that the high strength cardboard box manufacturing method. The method according to claim 1, wherein the copper plate is sculpted V-shaped cross section on the cylinder, the depth of the cross section is processed to maintain a depth of 35 ~ 45㎲ of high strength corrugated cardboard box manufacturing method having a vivid printing. The method according to claim 1, wherein the number of dots applied to the copper plate is printed within a range of 120 to 175 lines. According to claim 1, wherein the ink to be printed on the surface of the corrugated liner is a solution of a high strength corrugated cardboard box having a vivid printing portion, characterized in that a mixture of 30-30% pigment resin, 40% methyl alcohol, 30% isopropyl alcohol. Way. The method according to claim 1, wherein the printing ink is a high-strength cardboard box manufacturing method having a vivid printing portion characterized in that the heat resistance and wear resistance is increased by adding a thermosetting type maleic acid resin. According to claim 1, wherein a colorless coating agent is applied to the surface of the corrugated cardboard liner to prevent the smearing and scratches of the ink during the gating operation, as well as to increase the moisture-proof effect of the box characterized in that the high-strength printing having Of cardboard box manufacturing method. The method of claim 1, wherein when performing surface printing on one surface of the corrugated cardboard liner using the copper plate, static electricity is generated through an electrostatic generating means located above the cylinder (copper plate) to transfer ink of the cylinder to the corrugated cardboard liner. High strength cardboard box manufacturing method having a clear printing portion, characterized in that it further comprises a step. A cylindrical copper plate made of a V-shaped cross section and formed of a concave plate to be processed to maintain a depth of 35 to 45 kPa and to improve ink transfer degree; Ink supply means which is positioned in a state where a part of the bottom surface of the copper plate is impregnated so that a predetermined amount of ink is always supplied to the copper plate; A pressure roller installed at an upper side of the copper plate to pressurize the corrugated cardboard liner guided to the copper plate so as to transfer ink; And, the static electricity generating device attached to the pressure roller; High-strength corrugated cardboard box manufacturing apparatus having a clear printing portion, characterized in that consisting of. The apparatus of claim 8, wherein the surface of the pressure roller is coated with a rubber film layer in which a minute amount of electricity is induced. The method of claim 8, wherein the static electricity generating device is made of a fiber braid placed in the longitudinal direction on the pressure roller, through which the low-voltage low current electricity is transmitted to the rubber pressure roller having a vivid print portion, characterized in that High strength corrugated cardboard box manufacturing apparatus. The method of claim 8, wherein a colorless coating agent is coated on the surface of the corrugated cardboard liner to prevent bleeding and scratches of the ink during the gating operation, and to increase the moisture-proofing effect of the box. High strength cardboard box manufacturing apparatus having a clear printing portion characterized in that the laying. 10. The apparatus of claim 8, wherein the number of dots applied to the copper plate is printed within a range of 120 to 175 lines. The method of claim 8, wherein the ink transfer to the surface of the corrugated liner is a solution of a high strength corrugated cardboard box having a vivid printing portion, characterized in that a mixture of 30-30% pigment resin, 40% methyl alcohol, 30% isopropyl alcohol. Device. 9. The apparatus of claim 8, wherein the printing ink includes a thermosetting type maleic acid resin to increase heat resistance and abrasion resistance.

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