JPH03190697A - Manufacture of paperware punching die - Google Patents

Abstract

PURPOSE:To male a make die manufacturable by temporarily stopping a short sized member made by cutting a long sized member along a female die outer contour line and fixing it thereafter. CONSTITUTION:A long sized fixed member having the L shaped part consisting of a bottom side part and rise part at least on the section is cut in short sized members 30a-30d by setting to the straight line of a female die 22. The short sized members 30a-30d are then arranged at the outside thereof along the outline of the female die 22 and the L shaped bottom side is temporarily fixed to a base 20. Thereafter, the female die 22 is removed from the base, this bottom side is fixed to the base and a desired male die 32 is manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a paper carton punching die, and more particularly, to a method for manufacturing a paper carton punching die, in particular, a method for producing a paper carton punching die according to the pattern on a cardboard for paper carton manufacture on which cutout lines of a required pattern have been engraved in advance. The present invention relates to a method of manufacturing a paper carton punching die for producing die-cut cardboard along the cutout line by applying a pressing force.

(Prior art) The part inside the above pattern becomes the paper carton, and the part outside the pattern is often called "punching waste", for example, as described in Japanese Patent Publication No. 1983-49080, which was filed by the applicant earlier. ``A device for removing punching waste in a paper carton punching device'' is a document that exemplifies the prior art of the paper carton punching die in the present invention.

This conventional technology consists of a mold (hereinafter referred to as a "female mold") that presses a part of thick paper such as cardboard located inside the pattern or outline, and a part of the cardboard outside the outline that cooperates with this mold. A punching device is comprised of a pressing die (hereinafter referred to as a "male die"). The male mold is manufactured using a material with appropriate hardness and elasticity, such as mild steel plate, hard polyurethane, and soft polyurethane resin, to create a relatively small number of molds with extremely faithful patterns and therefore complex shapes. A common method is to manufacture parts and attach them to a base.

(Problem to be Solved by the Invention) However, the shapes and dimensions of folding cartons vary widely, and new types of folding cartons are being designed every day. must be renewed. However, while it is not very difficult to precisely manufacture a flat female die using tools such as a laser cutter, for a male die, cardboard with a punched pattern is temporarily held inside. By necessity, it has a three-dimensional shape, and when it was manufactured, it required skill and a lot of processing time, as it required laser cutting, drawing, cutting grooves with a sewing machine saw, and then bending the steel plate and pushing it into the grooves. This is more difficult than the female type.

Therefore, in paper carton manufacturing lines where patterns are frequently changed, a great deal of labor is consumed in producing the male dies, which has hindered the improvement of the productivity of the line.

(Means for Solving the Problems) In view of the above-mentioned circumstances, the present invention has been developed, in particular, among paper carton punching dies.
The purpose is to provide an efficient manufacturing method for the male mold. In order to achieve this object, the method for manufacturing a paper carton punching die according to the present invention includes a first step of preparing a long regular member having an L-shaped section consisting of at least a base and a rising part; A second step of temporarily fixing a female die containing a large number of straight sections against a base; a third step of cutting the long regular member into short members according to the straight sections; A fourth step of arranging the member along the outer contour of the female mold and temporarily fixing the bottom portion of the cross-shaped shape to the base; a fifth step of removing the female mold from the base; and a fifth step of removing the female mold from the base; and a sixth step of fixing to a base, producing a male mold in which a plurality of the short members corresponding to the female mold outline are fixed to the base surface.

In the most preferred embodiment of the present invention, the above-mentioned L
An elongated member with a U-shaped cross section is used, which has a protrusion parallel to the base of the letter-shaped portion on either side of the apex of the rising portion, and whose base extends beyond the rising portion.

Furthermore, in addition to the elongated member with a U-shaped cross section, it is often advantageous to use an elongated member with an inverted T-shaped cross section in which the base of the U-shaped portion only extends beyond the rising portion.

Further, an elongated member having a thickness adjustment portion on either the base or the rising portion of the U-shaped cross section is used, and in some cases, the rising portion may be placed at or near the apex of the rising portion of the inverted T-shaped cross section. It is often easier to adapt to ever-changing folding carton patterns by using an elongated member with an inverted T-shaped cross section to which an additional part can be attached to increase the width of the part.

(Function) The L-shaped, inverted T-shaped and U-shaped long regular members prepared in the first step above both have a bottom part that supports the rising part, so they are glued to the back side of the bottom part. If adhesive or adhesive tape is applied, the short member will be securely held in place along the folding carton pattern until it is fixed after the female mold is removed, and then fixed with nails, self-tapping screws, etc. It's easy to do. If the long member is made of a material that is easy to cut and has sufficient strength, such as plastic or aluminum, it is easy to make the short member, and the durability is sufficient, so it can be repeated many times. It can withstand use well.

(Effects 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 mold outline, and then fixed.
Since the male mold can be manufactured with this simple operation, the time required for manufacturing it is significantly shortened compared to the conventional method, and it is possible to quickly respond to changes in the paper carton design, and the productivity of the paper carton manufacturing line is greatly improved. Moreover, since expensive tools such as laser cutters are not required in the male die manufacturing process, even if the cutter is used to make the female die, its service life can be significantly extended, and overall the cost of manufacturing folding cartons can be further reduced. reduction is possible.

(Example) Fig. 1 shows a U-shaped elongated regular member (10) used in an example of the present invention, which has a rising portion (12).
, a bottom portion (14) extending beyond this, and a protrusion portion (16) extending from the apex of the rising portion (12) to one side in parallel to the bottom portion (14). Bottom part (14
) is attached with double-sided adhesive tape, and its outer surface (lowermost surface) is covered with a temporarily attached release paper. Second
The figure shows the rising part (12
) is an L-shaped elongated member (10) with a base (14) extending only in one direction from the bottom end of the hole. This is an elongated regular member (10) in the shape of an inverted letter whose base is extended and reinforced. As is clear from the figure, the above-mentioned U-shape and inverted-shape also basically include an L-shape as an essential element.

U-shaped long regular member (10) modified from the one in Figure 1
As shown enlarged in Fig. 4, the bottom part (14) has a V-shaped groove (18) along the length of the bottom part to facilitate driving of nails or self-tapping screws. It is engraved on the top surface, and the part near the rising part (12) is thicker on the upper surface side of the bottom so that the clearance between it and the female mold outline can be selected from two sizes A and B. It is formed as a height adjustment portion (14a).

After the first step of preparing several kinds of elongated shaped members (10) as described above, a method for manufacturing a male mold is as follows.

First, in the second step of fixing the female mold plate, as shown in Fig. 5, the female mold (22) is placed on the top surface of the base (20) as shown by the arrow, and holes ( 24) into the corresponding hole (26) on the base, and insert a bar (not shown) to fix the position.

In the third step, as shown in FIG. 6, the elongated member (10) is shaped to match the length of each straight line along the outer contour of the female mold (22) fixed to the base (20). A plurality of short members (30a), (30b), (30
c), (30d), (30e), etc. are prepared. In addition, although Fig. 5 shows an example of a two-part method in which two folding containers are punched out at the same time, in Fig. 6, for the sake of simplicity, a die for one folding container is shown as an example. - layer complexity).

In the fourth step, short members (30aL (30b), (30c), (30d) prepared in the third step as shown in FIG.
, (30e), etc., in the position shown in the figure, and this temporary fixing is performed using adhesive tape on the back side of the bottom part (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 regular member (10) in FIG. 1 or 4, the one of medium length (30b),
and the shortest one (30c), etc., are temporarily fastened as shown in the figure.

For a moderately narrow recess, use the one in Figure 3 or the diagonally cut protrusion (16) (30d) of the one in Figure 1, and cut the narrowest recess or hole (
Regarding the part 28), the elongated regular member (10
9 Using the cut material (30e) from )) In the fifth step, after removing the female mold from the base (2o), the ■-shaped part of the bottom part (14) shown in the fourth figure is removed. 11 (18) to perform the sixth step of fixing it to the base by nailing or stabling. As this fixing means, a self-drilling screw may be used to fix it to the base (2o).

The male mold (32) produced in this way is similar to the male mold (32) in FIG. 11 (corresponding to FIG. 5) showing an example of the prior art.
To be used in place of a), it is provided horizontally above the female mold (22). When both molds (32) and (22) are driven in the direction of approaching each other, the cardboard portion inside the pattern remains in the recess of the male mold at the cutout line of the cardboard previously engraved according to the pattern, and The outside part of the putter, that is, the debris, falls to the floor. Next, the cardboard piece (S) for assembling a folding carton is removed from the recess of the male mold (32) as shown in Fig. 7 (Fig. 6).
(corresponding to the figure).

Other embodiments of the present invention are shown in FIGS. 8 and 9.
Among them, the one shown in Fig. 8a is provided with a thickness adjustment part 33) on one side of the lower part of the rising part (12), which adjusts the clearance between the male edge and the female edge at a part of the folding carton corner. The example shown in Fig. 8b has a step-like thickness adjustment part (34) on the bottom (14), which allows for similar clearance adjustment. It has become even easier.

Figure 9a shows a lateral protrusion (1) at the apex of the rising portion (12).
6), and is a U-shaped additional part (36) equipped with protrusions (36a) that elastically engage the recesses (35) (35) provided on both sides slightly below the apex. This is useful when finely adjusting the width of the apex of the rising part. Similarly, the one in FIG. 9b also has a small protrusion (38a) that is to be engaged with a small recess (37a) on the inner surface of the groove when it is inserted into the vertical groove (37) recessed downward from the apex.
) on the legs.

When cutting and using the long regular member used in the present invention, for example, as shown in FIG. By bending as shown in FIG. 10(b), the rising portion (12) can be bent by hand and easily manipulated. Therefore, it is also possible to attach it while continuously bending it.

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

Also, regarding the order of the first to sixth steps, the front and back of the second and third steps are reversed, and each part is first cut into short pieces according to the dimensions along the outer line of the female mold. Modifications such as temporarily fixing the mold later are also possible.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of a long regular member used in the present invention, FIGS. 2 to 4 are front views of other long regular members also 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 fourth step; FIG. FIG. 9 is a front view of another long regular member, FIG. 10 is a perspective view showing an example of separate processing of the long regular member, and FIG. 11 is an exploded perspective view showing a conventional method.
It is. (10... Long regular shaped member, (12... Rising part, (14... Bottom part, (16... Projection part, (20... Base, (22... Female mold, ( 24 (26) (28)... Hole, (30a) to <30d) - Short member, (32)... Male mold, (3B) (34)... Thickness adjustment part, (36) (
38)...additional part, (S)...cardboard piece for paper carton. Fig. 2 809-4 Fig. 1 Fig. 4 Rod 97 Fig. 7 (a) Fig. 10 (b)

Claims (1)

[Claims] 1. An L whose cross section has at least a bottom portion and a rising portion.
A first step of preparing a long regular member having a letter-shaped portion;
A second step of temporarily fixing a female die containing a large number of straight line parts for paper carton punching against a base, and a third step of cutting the long regular member into short members according to the straight line parts. , a fourth step of arranging the short member on the outside of the female mold along the outer line and temporarily fixing the bottom part of the L-shape to the base; a fifth step of removing the female mold from the base; a sixth step of fixing the bottom part to the base, and producing a male die in which a plurality of the short members corresponding to the outer line of the female die are fixed to the base surface. Production method. 2. A claim for using an elongated member with a U-shaped cross section, which has a protrusion parallel to the base of the L-shaped part on either side of the apex of the rising part, and whose base extends beyond the rising part. A method for manufacturing a paper carton punching die according to item 1. 3. In addition to the elongated member with a U-shaped cross section, an elongated member with an inverted T-shaped cross section in which the base of the L-shaped portion only extends beyond the rising portion is also used. How to make paper carton punching dies. 4. The method for manufacturing a paper carton punching die according to any one of claims 1 to 3, wherein an elongated member having a thickness adjustment portion on either the base or the rising portion of the U-shaped cross section is used. 5. An elongated member with an inverted T-shaped cross section is used, at or near the apex of the rising part of the inverted T-shaped cross section, to which an additional part for increasing the width of the rising part can be attached. How to make paper carton punching dies. 6. Claims 1 to 6, wherein the temporary fixing in the fourth step is performed using an adhesive or adhesive tape applied to the back side of the bottom portion, and the fixing of the bottom portion in the sixth step is performed using a driving fixture or a machine screw. 5. The method for manufacturing a paper carton punching die according to any one of 5. 7. Claims 1 to 5, wherein the elongated member is made of a material selected from plastic and aluminum.
A method for manufacturing a paper carton punching die according to any of the above.