JPH0722917B2 - How to make a punch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a paper container punching die, and more particularly to a thick paper for paper container manufacturing in which a cutout line of a required pattern is previously engraved. The present invention relates to a method for producing a paper-machine punching die for applying a pressing force to produce a die-cut cardboard according to the cut line.

(Prior Art) Since the portion inside the pattern is a paper container and the portion outside the pattern is called "punching waste", it is described in, for example, Japanese Patent Publication No. 61-49080, which is the applicant's earlier application. The "external device for removing punching scraps in a paper container punching device" is a document exemplifying the prior art of the paper container punching die in the present invention.

In this conventional technique, a pattern (hereinafter referred to as a "female mold") for pressing a cardboard portion of cardboard or the like positioned inside the pattern or the contour line, and a cardboard portion outside the contour line that cooperates with the mold. A punching device is constituted by a pressing die (hereinafter referred to as a "male die"). The male mold is manufactured by using a material having appropriate hardness and elasticity, for example, a mild steel plate, a hard polyurethane and a soft polyurethane resin, which is extremely faithful to the pattern, and thus has a relatively small number of mold configurations with complicated shapes. It is common to manufacture members and attach them to a base.

(Problems to be Solved by the Invention) However, since the shapes and sizes of paper containers vary widely, and new types of paper containers are designed every day, the above-mentioned female type and male type are frequently used in the paper container manufacturing line. Must be renewed. However, it is not very difficult to precisely manufacture a flat-shaped female die with a tool such as a laser cutter, but for a male die, it is necessary to temporarily hold the punched patterned cardboard inside. Since it had a three-dimensional shape, it had to be skilled and required a lot of processing time because it had to be laser-cutted or drafted to make a groove with a sewing machine saw, and then the iron plate was bent and pressed into the groove when manufacturing. , It is more difficult than female type.

Therefore, in the paper container manufacturing line in which the pattern is frequently changed, a great deal of labor is consumed in manufacturing the male mold, which impedes the improvement of the productivity of the line.

(Means for Solving the Problems) In view of the above situation, the present invention aims to provide an efficient manufacturing method of a “male” punching die among paper-machine punching dies. In order to achieve this object, a method for manufacturing a paper-machine punching die according to the present invention comprises: A second step of temporarily fixing a female die including a large number of straight line portions to a base, and a third step of cutting the long fixed member into short members according to the straight line portions; A fourth step of arranging the member on the outer side along the outline of the female die and temporarily fixing the L-shaped bottom portion to the base, a fifth step of removing the female die from the base, and the bottom portion And a sixth step of fixing to the base, and a male mold in which a plurality of the short members corresponding to the female contour line are fixed to the base surface is manufactured.

In the most preferred embodiment of the present invention, L
A long fixed member having a U-shaped cross section is used, in which a protrusion parallel to the bottom of the character portion is provided on either side of the apex of the rising portion, and the base extends beyond the rising portion.

Further, in addition to the long shaped member having the U-shaped cross section, it is often useful to use a long shaped member having an inverted T-shaped cross section in which the base of the L-shaped portion only extends beyond the rising portion.

Further, a long shaped member having a thickness adjusting portion on either the bottom side or the rising portion of the U-shaped cross section is used, and in some cases, the rising portion is formed at or near the apex of the rising portion of the inverted T-shaped cross section. It is often easier to deal with the ever-changing paper container pattern by using a long fixed member having an inverted T-shaped cross section capable of attaching an additional portion that increases the width of the portion. The L-shaped and inverted T-shaped regions prepared in the process have a U-shaped long-sized fixed member each having a bottom portion that supports the rising portion, and therefore an adhesive or an adhesive tape is applied to the back side of the bottom portion. If so, the short member can be securely held at a predetermined position along the pattern of the paper container until it is fixed after the female mold is removed, and then fixed by nails or self-tapping screws. If the long member is made of a material that is easy to cut and has sufficient strength, such as plastic or aluminum, the short member can be easily manufactured, and its durability is sufficient. Can withstand use well.

(Effect of the invention) According to the method of the present invention, a short member made by cutting a long member is temporarily fixed along the female contour line, and then fixed.
Since the male mold can be manufactured by such a simple operation, the time required for manufacturing the male mold can be remarkably shortened as compared with the conventional method, the change in the design of the paper container can be promptly responded to, and the productivity of the paper container manufacturing line is remarkably improved. Moreover, since expensive tools such as laser cutters are not required in the male mold manufacturing process, even if the cutter is used to manufacture the female mold, the service life can be greatly extended, and the overall cost of paper container manufacturing can be further improved. It is possible to reduce.

(Embodiment) FIG. 1 shows a U-shaped long shaped member (10) used in one embodiment of the present invention, which has a rising portion (12) and
The bottom part (14) extending beyond this and the rising part (1
It has a protrusion (16) extending from the apex of 2) to one side in parallel with the base (14). A double-sided adhesive tape is attached to the lower surface of the bottom portion (14), and the outer surface (lowermost surface) thereof is covered with the temporarily-released release paper. FIG. 2 shows an L-shaped long shaped member (10) having a base portion (14) extending from the bottom end of the rising portion (12) to one side only so as to be suitable for mounting in a narrow space. FIG. 3 shows an inverted T-shaped elongated shaped member (10) in which the bottom portion of the one shown in FIG. 2 is extended and strengthened so as to be suitable for punching out the waste in the hole. As is clear from the figure, the U-shape and the inverted T-shape are basically shapes including the L-shape part as an indispensable element.

The U-shaped long shaped member (10) modified from the one shown in Fig. 1 is, as shown in the enlarged view in Fig. 4, nails or self-tapping screws are set in the bottom part (14). A V-shaped groove (18) that facilitates the above is engraved on the upper surface along the length direction of the bottom side, and further, the clearance between the female outer contour line can be selected in two sizes A and B. A portion close to the rising portion (12) is formed as a thick thickness adjusting portion (14a) on the upper surface side of the bottom portion.

First, to prepare several kinds of long shaped members (10)
After the process, the method of manufacturing the male mold is as follows.

First, as shown in FIG. 5, in the female die temporary fixing in the second step, the female die (22) is placed on the upper surface of the base (20) as shown by an arrow K, and a hole (appropriate hole is formed at an appropriate position). Align 24) with the holes (26) at the corresponding points on the board, and insert the rod (not shown) to fix it.

In the third step, as shown in FIG. 6, the long fixed member (10) is fitted to the length of each straight line portion along the outline of the female die (22) fixed to the base (20). Cut and cut multiple short members (30a), (30b), (30c), (30d),
This is a step of preparing (30e) and the like. In addition, FIG. 5 shows an example of a double type in which two paper containers are punched at the same time, but in FIG. 6, a mold for one paper container is illustrated for simplicity (however, the outline is for convenience of description). It is more complicated).

In the fourth step, as shown in FIG. 6 prepared in the third step, the short members (30a), (30b), (30c), (30d), (30e), etc. are temporarily fixed to the positions in the figure. This is an operation, and this temporary fixing is performed by the adhesive tape on the back side of the bottom portion (14). Of course, the release paper on the surface of the adhesive tape must be removed first. Along the outline of the female mold (22), the longest one (30a) cut from the long shaped member (10) of FIG. 1 or 4, the one of medium length (30b), and Temporarily fix the shortest one (30c) as shown. For medium-thin indentations, the protrusions (16) of those of Figure 3 or of Figure 1
A diagonally cut piece (30d) is used, and for the narrowest indented portion and hole (28), a piece (30e) cut from the long shaped member (10) of FIG. 2 is used.

After removing the female mold from the base (20) as the fifth step,
A sixth step of fixing to the base by nailing or stapling using the V-shaped groove (18) of the bottom portion (14) shown in FIG. 4 is performed. As this fixing means, a self-drilling screw may be used to fix the base (20).

The male die (32) produced in this manner is to be used in place of the male die (32a) shown in FIG. 11 (corresponding to FIG. 5) showing an example of the prior art, and is used above the female die (22). It is installed horizontally. When both molds (32) (22) are driven toward each other, the part of the cardboard inside the pattern remains at the male concave portion at the cutout line of the cardboard pre-engraved according to the above pattern. The part outside the pattern, that is, the dust, falls to the floor surface. Next, the cardboard piece (S) for assembling the paper container taken out from the concave portion of the male die (32) is as shown in FIG. 7 (corresponding to FIG. 6).

Another embodiment of the present invention is as shown in FIGS. 8-9, of which the one shown in FIG. 8a has a thickness adjusting portion (33) provided on one side of the lower portion of the rising portion (12), This is useful when the clearance between the male edge and the female edge is large at the corner of the paper container,
In the example of Fig. 8b, the bottom part (14) has a step-like thickness adjustment part (3
With 4), the same clearance adjustment is made easier.

FIG. 9a shows a type in which the apex of the rising portion (12) does not have a lateral protrusion (16), and is elastically engaged with the recesses (35) (35) provided on both sides slightly below the apex. Matching protrusion (36
A U-shaped additional portion (36) provided with a) is also used, which is useful when finely adjusting the width of the apex of the rising portion. Similarly in the case of FIG. 9b, when it is inserted into the vertical groove (37) recessed downward from the apex, a small recess (37
It is provided with a T-shaped additional portion (38) having a small projection (38a) on the leg to be engaged with a).

When the long shaped member used in the present invention is cut and used, for example, as shown in FIG. 10 (a), a cut is made in the bottom part (14), and the cut part is made to be outside. By bending as shown in FIG. 10 (b), the rising portion (12) can be manually bent and easily operated. Therefore, it is also possible to install it while bending it continuously.

The cross-sectional shape of the long shaped member used in the present invention is not limited to the above-mentioned one, and may be, for example, a "D" -shaped cross section.

Also, regarding the order of each of the first to sixth steps, the front and rear of the second step and the third step are reversed, and the dimension of each part along the female contour line and the cutting into the short member are performed first, Modifications such as temporary fixing of the mold later are also possible.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a long shaped member used in the present invention, FIGS. 2 to 4 are front views of other long shaped members used in the method of the present invention, and FIG. FIG. 6 is an exploded perspective view showing the second step in the method of the present invention, FIG. 6 is a plan view showing the same fourth step, FIG. 7 is a perspective view showing a cardboard cardboard piece of a predetermined pattern which has been punched, and FIGS. FIG. 9 is a front view of still another long shaped member, FIG. 10 is a perspective view showing another example of processing of the long shaped member, and FIG. 11 is an exploded perspective view showing a conventional method. (10) …… Long shaped member, (12) …… Rise, (1
4) ... bottom, (16) ... projection, (20) ... base,
(22) …… Female type, (24) (26) (28) …… Hole, (30a)
~ (30d) …… Short member, (32) …… Male type, (33) (3
4) …… Thickness adjustment part, (36) (38) …… Additional part,
(S): A cardboard piece for paper containers.

Claims (7)

[Claims] 1. A first long-sized fixed member having an L-shaped portion whose cross section has at least a bottom portion and a rising portion.
A second step of temporarily fixing a female die including a large number of straight line portions for punching a paper container against a substrate by a step; and cutting the long fixed member into short members in accordance with the straight line portion 3 steps, 4th step of arranging the short member on the outside along the outline of the female die and temporarily fixing the L-shaped bottom portion to the base, and 5th step of removing the female die from the base And a sixth step of fixing the bottom portion to the base, wherein a plurality of the short members corresponding to the female contour line are fixed to the base surface to manufacture a male mold. How to make a punching die. 2. A long shaped member having a U-shaped cross section, wherein a protrusion parallel to the bottom of the L-shaped portion is provided on either side of the apex of the rising portion, and the bottom extends beyond the rising portion. The method for manufacturing a paper-machine punching die according to claim 1, wherein 3. A long fixed member having an inverted T-shaped cross section in which, in addition to the long fixed member having the U-shaped cross section, the bottom side of the L-shaped portion only extends beyond the rising portion. 1. A method for manufacturing a punching die for a paper container according to 1. 4. The method of manufacturing a paper-machine punching die according to claim 2, wherein a long-sized fixed member having a thickness adjusting portion at either the bottom side or the rising portion of the U-shaped cross section is used. 5. A long fixed member having an inverted T-shaped cross section, to which an additional portion for increasing the width of the raised portion can be attached at or near the apex of the rising portion of the inverted T-shaped cross section. 3. A method for manufacturing a punching die for a paper container according to item 3. 6. The temporary fixing in the fourth step is performed by an adhesive or an adhesive tape provided on the back side of the bottom portion, and the bottom portion is fixed in the sixth step by a driving fixture or a small screw. A method for manufacturing a paper container punching die according to claim 1. 7. The long shaped member is made of a material selected from plastic and aluminum.
6. A method for manufacturing a paper-machine punching die according to any one of 5 to 5.