KR19990064478A - The method of printing a transparent plastic case and manufacturing the printed case - Google Patents

Abstract

The present invention is quick and easy through a method of printing a transparent plastic box which significantly lowers the manufacturing cost while maintaining uniformity of the printing state and a post-processing process for forming into a box printed by the above printing method. In order to provide a method of manufacturing a transparent plastic box, which is made to significantly reduce the manufacturing cost, in order to achieve the above object, a transparent plastic box in which a letter or a picture is printed while the contents stored therein are visible. In the printing method, PP (polypropylene), PVC (polyvinyl chloride), PET-A (polyethylene terephthalate-A), PET-G (polyethylene terephthalate-G) having a thickness of 150 µm to 400 µm It is used for manufacturing the transparent plastic box wound in the form of a roll of any one or a combination of at least two. In a method of manufacturing a transparent plastic box printed on a film by a rotary drum printing machine, and a character or picture is printed by the above method, the printed film is cut by printing units having a box-opening shape while being unwound again. And a box shape is formed by lining the developed shape of the cut box.

Description

The method of printing a transparent plastic case and manufacturing the printed case}

The present invention relates to a method of manufacturing a printed box and printing of a transparent plastic box for printing a letter or a picture while showing the contents stored therein, specifically, a transparent plastic box containing a toothbrush, cosmetics, toys, etc. Method of printing a transparent plastic box that significantly reduces the manufacturing cost while maintaining uniformity of the printed state by supplying a roll-type film used for the purpose of printing to a rotary drum printing machine and from the printed roll-type film A method of manufacturing a plastic box.

In general, in printing characters or drawings on paper or film, silk printing, offset printing, graver printing and rotary drum drum printing may be used depending on the material or purpose of printing. It is applied to the method, such as PP (polypropylene), PVC (polyvinyl chloride), PET-A (polyethylene terephthalite-A), PET-G ( When printing a film of any one of polyethylene terephthalite-G or a combination of at least two or more for use in the use of a transparent plastic box, there are the following problems.

First, in the Gravure printing, as shown in Figure 1, the film 110 of the roll-shaped to be printed is engraved with a letter or a picture 130, through which the printing frequency to supply the ink of the corresponding color (in this case, the printing frequency is 4 C) A character or a picture is printed while passing through a plurality of rollers 120 corresponding to the rolled film 140 of the finally printed roll form.

However, since the film 110 to be printed uses a large-capacity large-capacity one, the weight of the film itself is large so that the tension applied to the film during the printing operation is not kept constant. As a result, it is difficult to accurately match the focus between printing patterns.

In addition, since the printing operation is performed at a high speed, when the ink printed on the film is finally rolled up in the form of a roll of the printed film 140, the front and rear surfaces of the film stick to each other.

Therefore, Grabureer printing is limitedly used only for printing papers with a relatively constant tension between films, thick sheets of paper, or confectionery wrapping papers that do not require the accuracy of the pint between printing patterns.

In order to solve the problem of the grabber printing method, in the grabber printing of FIG. 1, when the width of the roll-shaped film is narrowed, the weight of the film itself can be reduced, so that the tension can be kept constant. UV irradiator 230 to increase the accuracy of the pint between printing frequency of printing, and also to solidify the ink printed on the film after passing through the roller 220 for supplying ink in the form of letters or pictures to be printed by the printing frequency step by step (230) Since it is dried by) to move to the next roller 220, it is possible to prevent the occurrence of the phenomenon that the front and rear of the film stick to each other.

However, the envelopes used for packaging have a film thickness of 150 μm or less, and there is no problem even if the printing is performed while changing the direction of printing, but if printing using a film having a thickness of 150 μm or more, Since the bent portion of the hand process exists for each printing frequency, it is difficult to maintain the tension, which causes the problem of inaccurate pint printing.

Therefore, in general, PP (polypropylene) and PVC (polyvinyl chloride) having a thickness of about 150 μm-400 μm thicker than those for printing a character or a picture using a film having a thickness of 150 μm or less as a printing target ), PET-A (polyethylene terephthalite-A), PET-G (polyethylene terephthalite-G), or when printing a film in combination of at least two or more to use for the use of a transparent plastic box, In order to use a transparent plastic box, a film is printed in a sheet form by a silk or offset printing method for printing letters or pictures.

In the double silk printing, the film is formed in a sheet shape 310 having a predetermined size, and the desired printing film 340 is obtained by manually printing each printing frequency through the silk printing plate 320.

However, by manually printing silk sheets on the sheet-like film, the focus may be inaccurate, and the printing speed of the final plastic box may be low, depending on the number of colors to be printed. Since the frequency is determined, only one color is printed at a time, thereby increasing manufacturing cost and increasing manufacturing cost. In addition, the use of highly volatile and toxic inks and solvents also makes the working environment worse.

From this, there is an offset printing method as one of methods for solving the disadvantage of unit printing by the printing frequency in the silk printing, but in the case of offset printing, there is a limitation in the expression of white and black when printing. Since the film is in the form of a sheet and static electricity is generated between the films, the film is not suitable for printing a film used for a plastic box.

Therefore, as mentioned above, in the Gravure printing, the accuracy of the pint is maintained between the printing patterns, so that the uniformity of the product is required, and the manufacturing cost is increased by increasing the printing speed without unit printing by the printing frequency as in silk printing. You need to lower it. There is also a need to produce quickly and easily by maintaining closeness with the post-treatment process for forming printed films into plastic boxes.

From this, the 1st objective of this invention is providing the printing method of the transparent plastic box which significantly reduces a manufacturing cost, maintaining the uniformity of a printing state.

In addition, the second object of the present invention is to produce a transparent plastic box that can be quickly and easily performed through linkage with a post-treatment process for forming a box printed by the above printing method, thereby significantly lowering the manufacturing cost. To provide a way.

FIG. 1 illustrates a process of grabber printing a character or picture on a roll of paper or film.

Figure 2 shows a cross-sectional view of a light grabber printing process in which the width of the roll-shaped film is narrowed to increase the accuracy of the focus between printing patterns.

FIG. 3 illustrates a process of silk printing a letter or picture onto a sheet-shaped film used for the use of a transparent plastic box.

FIG. 4 illustrates a process of printing a rotary drum on a film used for the use of a transparent plastic box in the form of a roll according to an embodiment of the present invention.

FIG. 5 illustrates some of the processes of cutting the rotary drum of the printed film, leaving only the necessary wings at both ends of the printed film, according to one embodiment of the invention.

FIG. 6 illustrates a process of forming a box shape by cutting a roll-shaped film printed by rotary drum printing according to an embodiment of the present invention, cutting each unit of the unfolding shape of a box and then arranging it. .

Figure 7 is a roll-shaped film printed by rotary drum printing according to an embodiment of the present invention, while cutting again leaving only the necessary wings of both ends of the box and cut it by the unit of the unfolding shape of the box, line-up To illustrate a step of forming a box shape.

* Explanation of symbols for the main parts of the drawings

100: Gravure printing process 110, 210, 410: film in the form of a roll to be printed

120, 220, 420: printing rollers 130, 330: characters or pictures to be printed

140, 240, 440, 610, 710: printed rolled film

200: light graph viewer printing process 230, 430: ultraviolet irradiator

300: silk printing process 310: film in the form of a sheet to be printed

320: silk printing plate 340: film in the form of a printed sheet

400: rotary drum printing process 450: large drum

500: blade cutting process of printed film

510: wing portion 520, 720: removal portion of the film

530, 730: cutter for forming wing parts

600: process of manufacturing a box by cutting the printed roll-shaped film into a printing unit

620: printing unit parts 630: box shape cutting machine

640, 740: unfolded shape of the cut box

650, 750: Unfolded shape of lined box

660, 760: Plastic Box

700: process of manufacturing a box by molding the film wings of the printed roll form

770: roller for film tension maintenance 780: printing unit cutter

In order to achieve the above object, the invention according to claim 1 of the present invention is a printing method of a transparent plastic box in which a letter or a picture is printed while the contents stored therein are visible, the thickness of 150 μm to 400 μm. Roll form of any one or a combination of PP (polypropylene), PVC (polyvinyl chloride), PET-A (polyethylene terephthalite-A), PET-G (polyethylene terephthalite-G) A character or picture is printed by a rotary drum printing machine on a film used for the production of the transparent plastic box wound with a roller.

In addition, the invention according to claim 2 of the present invention is a method of manufacturing a transparent plastic box in which a letter or a picture is printed while showing the contents stored therein, wherein the PP having a thickness of 150 µm to 400 µm The transparent wound in the form of a roll of any one or a combination of at least two of polypropylene), PVC (polyvinyl chloride), PET-A (polyethylene terephthalite-A), PET-G (polyethylene terephthalite-G) On the film used for the manufacture of the plastic box, after printing a character or picture by a rotary drum printing machine, the printed film wound in a roll form is cut again by printing unit of the box unfolding shape while unwinding, It is characterized by forming a box shape by forming a line in the developed shape.

In addition, the invention according to claim 3 of the present invention is a method of producing a transparent plastic box in which a letter or a picture is printed while the contents stored therein are visible, wherein the PP having a thickness of 150 µm to 400 µm The transparent wound in the form of a roll of any one or a combination of at least two of polypropylene), PVC (polyvinyl chloride), PET-A (polyethylene terephthalite-A), PET-G (polyethylene terephthalite-G) After printing a character or picture on a film used for manufacturing a plastic box by a rotary drum printing press, the printed film wound in a roll form is unwound and cut, leaving only the necessary wings at both ends of the film. It is characterized in that it is to cut it for each printing unit of the box development shape, and to form a box shape by lining the developed shape of the cut box. .

In addition, the invention according to claim 4 of the present invention is a method of producing a transparent plastic box in which a letter or a picture is printed while the contents stored therein are visible, wherein the PP having a thickness of 150 µm to 400 µm The transparent wound in the form of a roll of any one or a combination of at least two of polypropylene), PVC (polyvinyl chloride), PET-A (polyethylene terephthalite-A), PET-G (polyethylene terephthalite-G) After printing a character or picture on a film used for manufacturing a plastic box by a rotary drum printing machine, leaving only the necessary wings at both ends of the printed film, cutting it and winding it in a roll form, and then unrolling it again. While cutting the box by the printing unit of the box deployment shape, and to form a box shape by lining the developed shape of the cut box .

Hereinafter, a method of printing a transparent plastic box and a method of manufacturing a printed box according to an embodiment of the present invention will be described in detail with drawings.

Figure 4 illustrates a process of rotary drum printing on a film used for the production of a transparent plastic box in the form of a roll of letters or drawings in accordance with one embodiment of the present invention.

One of the general printing methods, the rotary drum printing method, the film to be printed is not in the form of a sheet but in the form of a roll, and a character or a picture to be printed is drawn for each step of printing, and a roller 420 for supplying ink is provided. Each time it passes through the UV irradiator 430 so as to solidify the ink engraved with the printed letter or shape, and then moved to the next roller 420, a large circular drum 450 is rotated to maintain a constant tension of the film It is possible to maintain the accuracy of the pint between printing patterns by maintaining the quality and minimizing the bent portion by the printing frequency.

Therefore, the rotary drum printing method currently printing while rotating the large-sized drum 450 rotates a character or a picture on a paper or film such as a sticker, a label, or a tag of a product having a thickness of 150 μm or less, which requires accurate printing conditions. It is commonly used for printing.

Here, the present inventors have a thickness of 150 µm to 400 µm, PP (polypropylene), PVC (polyvinyl chloride), PET-A (polyethylene terephthalite-A), PET-G (polyethylene terephthalite-G) In printing a character or a picture on a film used for manufacturing a transparent plastic box wound in the form of a roll of any one or a combination of at least two, unlike the method of silk printing on a sheet-like film, the film Is applied in the manufacture of a transparent plastic box, while maintaining the accuracy of the pint of the printing pattern, which is an advantage of rotary drum printing, by applying a method that has never been used in the form of a roll and printing by a rotary drum printing method. It has been found that printing of films having a thickness above 400 μm is possible.

In this way, when printing a film conventionally supplied in sheet form by silk printing, the printing and manufacturing speed of the box is about 5 m / min, whereas the film supplied in the roll form of the present invention is a rotary drum printing method. Printing by 40-50m / min is about 8-10 times the speed difference.

As a result, the overall manufacturing cost is significantly lowered, and the working environment is improved as compared to the conventional silk printing method, while maintaining the accuracy of the pint between printing patterns, which is an advantage of rotary printing, and achieving a uniform printing state.

In addition, each time the roll-shaped film passes through the roller 420, the film is irradiated to the film by an ultraviolet irradiator 430 having a strength of 50-200 lx to rearrange the molecular structure of the thermosetting film to make a box. The smoothness of can be maintained. Here, as a method for maintaining the box shape as a final product, it is possible to further maintain the smoothness of the film by winding the film in the first roll form in the opposite direction after printing.

Looking at the method of manufacturing a transparent plastic box printed by the above printing method from Figures 5 to 7, first, as shown in Figure 5, printed by the rotary drum printing of Figure 4 according to an embodiment of the present invention The film is wound in a roll shape while the cutter 530 for forming a wing portion is operated at a predetermined cycle, thereby separating the cut-out portion 520, leaving only the necessary wing portions 510 at both ends of the film. Since it is possible to manufacture the box more quickly and easily.

In addition, as shown in FIG. 5, the box may be manufactured from a film that is once printed and wound in a roll state as well as by forming and winding a wing portion of the printed film.

6 is a deployment shape of a box for each printing unit part 620 by the deployment shape cutter 630 of the box while again unwinding the roll-shaped film 610 printed by rotary drum printing according to one embodiment of the present invention. After cutting (640) to form a final shape of the box, the folded portion is formed by high frequency heating to form a high frequency (650), and then the box (660) is finally formed.

In addition, as shown in Figure 7, according to an embodiment of the present invention, the film 710 wound in the form of a roll printed by rotary drum printing, the blade portion forming cutter 730 to operate at a predetermined cycle of the film After cutting only the necessary wing portions at both ends to form a wing shape, it is cut into a printing unit through the printing unit cutter 780 while maintaining a constant tension by pressing the film through the film tension maintaining roller 770. . It becomes the unfolded shape 740 of the box of the cut printing unit, and the unfolded shape of the folded part for box formation is obtained in the unfolded shape 740 of the box to obtain the unfolded shape 750 of the unwrapped box. 780 is formed.

Such a box manufacturing method has a great advantage compared to forming a box from a film in the form of a sheet in which manual use is used. The present inventors use a film in a roll form to overcome the disadvantages of the general printing methods currently used. The printing of the roll-shaped film was performed by applying the rotary drum printing method, and the transparent plastic was printed. The film printed by the roll-type film supplying method of the present invention in manufacturing a plastic box having a certain shape from the printed film was thus printed. By linking with the post-treatment process, we have completed a method that is simpler and significantly lowers manufacturing costs.

The box of the present invention can be used, for example, in the packaging of toothbrushes, cosmetics, toys, etc. The present invention is not limited to those described above, and various modifications can be made within the scope of the technical idea of the present invention. Can be.

As described above, the present invention enables to perform a printing operation at a low cost while maintaining the uniformity of the product, and also to be linked to the operation for forming a box from the roll-shaped film applied to the printing operation Even in manufacturing, it is possible at low cost.

Claims (4)

In the printing method of a transparent plastic box printed with letters or pictures while showing the contents stored therein, Any one or at least one of PP (polypropylene), PVC (polyvinyl chloride), PET-A (polyethylene terephthalite-A) and PET-G (polyethylene terephthalite-G) having a thickness of 150 to 400 µm; A printing method of a transparent plastic box, wherein a character or picture is printed by a rotary drum printing machine on a film used for producing the transparent plastic box wound in the form of a roll of a combination of two or more. In the manufacturing method of a transparent plastic box printed with letters or pictures while showing the contents stored therein, Any one or at least one of PP (polypropylene), PVC (polyvinyl chloride), PET-A (polyethylene terephthalite-A) and PET-G (polyethylene terephthalite-G) having a thickness of 150 to 400 µm; After printing a character or picture by a rotary drum printing machine on the film used for manufacturing the transparent plastic box wound in the form of a roll of a combination of two or more, unwinding the printed film wound in the form of a roll A method of manufacturing a transparent plastic box, characterized in that it is cut for each printing unit of the box unfolding shape, and the box shape is formed by lining the unfolded shape of the cut box. In the manufacturing method of a transparent plastic box printed with letters or pictures while showing the contents stored therein, Any one or at least one of PP (polypropylene), PVC (polyvinyl chloride), PET-A (polyethylene terephthalite-A) and PET-G (polyethylene terephthalite-G) having a thickness of 150 to 400 µm; After printing a character or picture by a rotary drum printing machine on the film used for manufacturing the transparent plastic box wound in the form of a roll of a combination of two or more, unwinding the printed film wound in the form of a roll After cutting leaving only the necessary wings of both ends of the film, it is cut for each printing unit of the box deployment shape, and a line to the cut shape of the cut box to form a box shape, characterized in that to form a box shape. In the manufacturing method of a transparent plastic box printed with letters or pictures while showing the contents stored therein, Any one or at least one of PP (polypropylene), PVC (polyvinyl chloride), PET-A (polyethylene terephthalite-A) and PET-G (polyethylene terephthalite-G) having a thickness of 150 to 400 µm; After printing a character or picture by a rotary drum printing machine on a film used for manufacturing the transparent plastic box wound in the form of a roll of a combination of two or more, cutting is performed leaving only the necessary wings of both ends of the printed film. In the state of winding in the form of a roll, while releasing it again, cutting for each printing unit of the box deployment shape, to form a box shape by lining the developed shape of the cut box.