JPS6048330B2 - Manufacturing method of blank board for paper cup - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a blank board for a paper cup, and when punching out a blank board from the blank board material, cutting tabs that are unnecessary for the final product are removed from the blank to prevent waste. By providing it at both ends of the straight cut side of the plate, the subsequent manufacturing process is efficient, and the manufactured product has higher precision than those manufactured by conventional methods. There are some things you can get that are expensive.

Normally, a paper cup has an exposed end surface of the paper material used to seal the body on the inner surface of the container, but when the paper cup is used as a packaging container for liquid, the end surface of the paper material used to seal the body is exposed inside the container. Measures must be taken to prevent the cut end surface from being exposed because the liquid content may be contaminated by bacteria that have been exposed to the cut end, and the barrier properties may be poor.

As a countermeasure for this, there is a method of covering the cut end of the blank board by thermally adhering a synthetic resin film or a tape made of a synthetic resin film and aluminum foil, but the shape of the blank board as the material for the cup is Generally, it is fan-shaped, so if you take the conventional method of (1) attaching the tape continuously to a strip-shaped winding material (Figure 3),
Since it is necessary to punch out the blank board rather than the rolled material, there are drawbacks such as meandering of the rolled material, which causes errors in punching, large errors in dimensional accuracy, and wasted material when making impressions. 2) If you use the method of pasting the tape after punching out a blank board from the material (Figure 4), the tape will be cut and pasted, so there will be a misalignment between the pasting position of the blank board and the tape position. This resulted in drawbacks such as precision being required for this adjustment and the machine being complicated. The present invention was created in view of these points, and in order to avoid wasting the material of the blank board, for example, four fan-shaped boards are arranged in a mountain shape in the width direction of the material of the strip board. Punch out in the same state.

In this case, the J-punched blank board is provided with cutting tabs at both ends of the straight cut side of the fan-shaped board for convenience in subsequent processing. The tape is supported on a stretcher by a transporting member and is continuously fed in one line in the direction of the cut side in a straight line, and the tape is continuously applied to the cut side having the cutting tab by a known tape applying device. wear. In the next step, the taped blank is cut at the cutting tab to create the final fan-shaped blank for the paper cup. To explain the drawings, when punching out a blank board 2 with cutting tabs 3 shown in FIG. 2 from a blank board material 1 as shown in FIG. They are arranged in the width direction of the blank plate material 1 so that the linear cut sides of the blank plates 2 are along the side edges of the blank plate 1, and at the same time, the straight cut sides of the blank plates 2 are opposite to each other (the one in the drawing is 4 in a mountain shape
) Punch out.

As shown in FIG. 2, the punched blank board 2 is provided with cutting tabs 3 at both ends of the straight cut side, and the blank board 2 is attached to the transfer member using the tabs 3. They are supported on racks in rows and fed in the direction of the straight cut edges. At this stage of transfer, a known tape pasting device (not shown) is used to attach the blank board 2 so that the cut edge on the tab 3 side is made of, for example, polyethylene 40μ film or polyethylene 40μ/aluminum 25μ film.
It is covered and pasted with a tape 5 made of a laminated film of μ/40μ of polyethylene.

With tape. The tab 3 is cut off from the coated blank plate 2 at the position 4, and a fan-shaped blank plate 2 as a final product for a paper cup as shown in FIG. 3A is completed. Fig. 4 shows the case where a blank plate 2' is punched out from a tape 5' continuously attached to a strip-shaped rolled material 1'.
If such a measure is taken, not only will the meandering of the rolled material cause errors in punching, resulting in errors in the dimensions of the blank board 2', but also the waste of the portion 6 of the material 1' will increase.

Figure 5 shows the case where a blank board 2" is punched out from the material and then a tape 5" is pasted on it. If such a method is used, the tape 5" is cut and pasted, so it is difficult to attach the blank board. Accuracy is required to match the position of the tape to the position of the tape, and the machine becomes complex.

In the present invention, the blank board is molded in the arrangement shown in Figure 1, so there is no waste of blank board material, and the manufacturing process after blank board punching is simplified by simply providing the blank board with a cutting tab. It not only improves the quality of the product, but also has many effects such as improving finishing accuracy.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the process of punching out a blank board from a raw material in the present invention. Figure 2 is a front view (a) and a side view (a) of a blank board punched out of the material according to the present invention. FIG. 3 is a front view and a sectional view of a blank board with cutting tabs cut off according to the present invention. Figure 4 A is an explanatory diagram of making a mold from a rolled material to which a conventional tape is attached. FIG. 5A is an explanatory diagram of the pasting relationship between a conventional punched blank board and cut tape. 1... Blank board material, 2... Blank board punched from material, 3... Cutting tab, 5...
··tape.

Claims (1)

[Claims] 1. In order to avoid wasting the material in the width direction of the strip-shaped blank board material, fan-shaped boards with cutting tabs at both ends of the straight sides are lined up in a meandering manner and punched out, and this blank board with cutting tabs is punched out. The tab is used to suspend and support the transfer member, and the board is sent in a connected state in the direction in which the board surface spreads. At the same time, a tape such as polyethylene is covered and pasted on the cutting edge of this cutting tab side, and this is used in the next process. A method for manufacturing a blank board for a paper cup, characterized by cutting off a cutting tab.