JP2003094391A - Ruler blade for rapping die and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ruler blade for a rapping die capable of high quality punching of a tabular object by preventing poor appearance due to the rupture of the tabular object in the process of groove formation for folding and a method for manufacturing the same and a method for efficiently manufacturing a ruler blade suitable for rupture-free high quality turnback section. SOLUTION: The rapping die, intended for punching a tabular object into a desired form by using a punching blade, is provided with ruler blades for forming a turnback sections in the tabular object. The ruler blades form alternately a cutting blade for forming a cut for turnback along the edges intersecting the length of the tabular blade and a groove, and forms cutout section grooves in the convex surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die-cutting ruled line for forming a folded portion when a plate-like body such as paperboard (cardboard paper, thick kraft paper, etc.) or synthetic resin plate is formed into a desired shape. A blade and a manufacturing method thereof.

[0002]

When manufacturing, for example, a cardboard box, a shape punching blade arranged corresponding to the developed shape of the cardboard box and a shape provided with ruled line blades for forming a notch for folding and a concave portion are provided. Corrugated paper is punched using a punching die.

The ruled line blade therein is formed by alternately providing a cutting blade and a notched portion each having a predetermined longitudinal width at one end edge of a long plate-shaped blade in a direction orthogonal to the longitudinal direction. Since the notch portion is formed by grinding or punching, the trough portion of the notch portion is formed in a flat rectangular shape.

For this reason, for example, when a corrugated board is pressed against a corrugated board to form a recess for folding back by the notch, a part of the corrugated board is broken by the flat corner of the trough and the inside is exposed. Therefore, when formed into a box, the appearance was poor. In particular, in the case of using corrugated cardboard paper colored with a desired color, the ground color inside was exposed at the break point and the color was different from the other points, resulting in poor appearance.

The present invention has been invented in order to solve the above-mentioned conventional drawbacks, and a problem to be solved is that the plate-shaped body is broken when the recess for folding back is formed in the plate-shaped body. It is an object of the present invention to provide a die-cutting ruled line blade capable of punching and forming a plate-shaped body with high quality while preventing appearance defects, and a manufacturing method thereof.

Another object of the present invention is to provide a method of manufacturing a ruled line blade capable of efficiently manufacturing a ruled line blade suitable for forming a high quality folded portion without breakage.

[0007]

A ruled-line blade of a die-cutting die according to claim 1 is provided in a die-cutting die for punching a plate-shaped body into a desired shape by a punching blade, and a folded-back portion is formed on the plate-shaped body. In the ruled line blades to be formed, cutting blades that form notches for folding and notches that form recesses are alternately formed at the edges of the plate-shaped blade in the direction orthogonal to the longitudinal direction, and the valleys of the notches are convex. It is characterized in that it is formed on a curved surface.

The method for manufacturing a ruled line blade according to a second aspect of the present invention is a ruled line blade for forming a notch and a recess for folding back when a plate-shaped body is punched into a desired shape by a shape-cutting blade. The edge of the plate-shaped blade body with the cutting blade formed on the edge in the direction of the edge is pressed into the forming die having the concave curved die to form the edge including the cutting blade, and the notch with the valley being the convex curved surface. It is characterized in that the cutting blade and the notch are alternately formed by plastic deformation.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to the drawings showing the embodiments. First, the ruled line blade will be described. Referring to FIGS. 1 to 3, a plate 5 of corrugated paper, thick kraft paper, synthetic resin plate or the like is formed on the mold plate 3 of the die-cutting mold 1 in a desired developed shape. The punching blades 7 that are arranged so as to coincide with each other and, for example, the notch 5a for folding and the recess 5 at the boundary between the bottom plate and the side plate.
A ruled line blade 9 forming b is provided.

The mold plate 3 is attached to a movable body (not shown) which moves up and down with a predetermined stroke, and the movable body is moved to press the punching blade 7 and the ruled line blade 9 of the mold plate 3 against the plate-like body 5. As a result, the punching blade 7 is used to form a desired shape, and the ruled line blade 9 is used to form the folding cut 5a and the recess 5b.

The ruled line blade 9 has a plurality of incision blades 11a for forming a plurality of incisions on one end edge in the longitudinal orthogonal direction of a metal plate-shaped blade body 11 which is long and has a predetermined width in the longitudinal orthogonal direction.
And notches 11b for forming recesses, which are ruled lines, are alternately formed. The notch 11b has a valley formed on the convex curved surface 11c at a predetermined depth from the cutting edge of the cutting blade 11a.

Next, a method for manufacturing the above ruled line blade 9 will be described. First, the molding device 13 will be described. In FIG. 4, a pair of rotary supports 17 having an axis line in the vertical direction are provided on the loading side of the support base 15, and a pair of rotary supports 17 having the axis line in the vertical direction are also provided on the unloading side. Are provided respectively, and the rotary support body 17 and the feed rotary body 19 sandwich the plate-shaped blade body 11 and convey it at a predetermined pitch.

An electric motor (not shown) is connected to the feed rotor 19, and the plate blade 11 is fed by rotating the feed rotor 19 at a rotation angle according to a predetermined pitch. . A servomotor capable of numerical control is suitable as the electric motor, but is not limited to this.

A movable body 23 is movably supported above the support base 15, and is connected to a cylinder or a crank mechanism.
The movable body 23 is moved up and down with a predetermined stroke by a reciprocating drive member (not shown) such as an electric motor.

A molding die 25 is attached to the movable body 23 facing the support base 15. As shown in FIG.
5 is a slit in which the width of the plate-shaped blade 11 in the feed direction matches the width of the notch 11b in the longitudinal direction, and the plate-shaped blade 11 having the other end edge supported by the support base 15 is movably supported. 25a
Is formed. The slit 25a supports the upper part of the plate-shaped blade 11 inserted from the side of the molding die 25. Then, the valley portion of the slit 25a is pressed against the upper edge of the plate-shaped blade body 11 to be plastically deformed, thereby forming a notch portion 11b having a predetermined depth.
And the valley portion of the cutout portion 11b is formed in the concave curved mold portion 25b which is formed in the convex curved surface 11c.

The plate-shaped blade 11 is formed by the forming device 13 described above.
The notch 11b is formed as follows.

First, one edge of the plate-shaped blade 11 is ground to form a cutting blade 11a. The plate-like blade body 11 with the cutting blade 11a facing upward is supported on the support base 13 and is clamped by the rotary support body 17 and the feed rotary body 19, and the cutting blade 11a side is inserted and supported. At this time, there is a gap between the upper end of the plate-shaped blade 11 and the concave curved mold portion 25b of the slit 25a, which allows the plate-shaped blade 11 to move. As a result, the plate-shaped blade body 11 on the support base 13 is supported by the rotary support body 17, the feed rotary body 19, and the molding die 25 at a total of three points.

In the above state, the forming die 25 is moved downward with a predetermined stroke to form the concave curved die portion 25b with the cutting blade 11.
When the plate-shaped blade body 11 on which a is formed is pressed into contact with the upper part, as shown in FIG. 6, the upper part including the cutting blade 11a is fractured and plastically deformed to form the notch 11b in accordance with the pressure contact. At this time, the valley portion of the cutout portion 11b is formed on the convex curved surface 11c by the concave curved mold portion 25b.

After returning the forming die 25 to the upper position after the above operation, the plate blade 11 is fed by one pitch as the feed rotor 19 rotates, and the notch 11b is formed next. The upper part of 11 is located in the slit 25 a of the molding die 25.

When the ruled-line blade 9 manufactured as described above is pressed against the plate-like body 5 to form the notches 5a and the recesses 5b for folding back, as shown in FIG. 7, the troughs of the notches 11b are convex. Since it is formed on the curved surface 11c, it is possible to prevent the peripheral edge of the recess 5b in the plate-like body 5 from breaking.

In the above description, the molding die 25 is reciprocally moved while feeding the plate-shaped blade body 11 at a predetermined pitch using one molding die 25, and the plate-shaped blade body 11 is projected to the upper part and the valley part. Although the notch 11b having the curved surface 11c is sequentially formed, as shown in FIG. 8, the molding die 25 of the embodiment is used as the die unit body 80, and the plurality of die unit bodies 80 are used as the cutting blades 11a. Forming die 8 integrated at intervals corresponding to the longitudinal width of the
1, and the slit 80a provided in the mold unit 80
A method may be used in which a plurality of notches 11b are formed at a time on the edge of the plate-shaped blade body 11 through which the holes are inserted.

Further, a plurality of plate-like blades 11 are brought into close contact with each other and a single or a plurality of molding dies having slits having a width corresponding to the total thickness of these plate-like blades 11 are used once. Alternatively, a method of forming a notch for forming a ruled line on a plurality of plate blades may be used.

In the above description, the cutting blade 11a is previously provided at one end edge.
The plate-like blade body 11 formed continuously with the notch 1
1b is used, but a plurality of cutouts 11 are formed at one edge of the plate-shaped blade body 11 in which the cutting blades 11a are not formed.
A method of forming the cutting blade 11a by grinding the remaining portion between the cutout portions 11b after forming b is also possible.

In the above description, the plate blade is sandwiched between the pair of rotary supports and the feed rotor, and the plate blade is pitch-fed as the feed rotor rotates. A method in which a gripping mechanism is attached to a movable body that can be numerically controlled on the unloading side, and the movable body is pitch-fed to move the plate-shaped blade body while the gripping mechanism grips the end of the plate-shaped blade body. May be

In the above description, while the upper side of the plate-shaped blade 11 is inserted and held in the slit 25a of the molding die 25, the molding die 25 is reciprocally moved in the vertical direction so that the upper edge of the plate-shaped blade 11 is moved. Although the notch 11b is formed, the support base 15 is provided with a support groove for inserting and supporting the lower part of the plate-shaped blade 11, and the support groove supports the lower part of the plate-shaped blade 11. Alternatively, the notch 11b may be formed in the upper end edge of the plate-shaped blade 11 by reciprocating the forming die 25 in the vertical direction.

[0026]

Industrial Applicability According to the present invention, a plate-shaped body is punched and molded with high quality while preventing the plate-shaped body from breaking and causing a defective appearance when forming a recess for folding back in the plate-shaped body. You can
Further, it is possible to efficiently manufacture a ruled line blade suitable for forming a high-quality folded-back portion without breakage.

[Brief description of drawings]

FIG. 1 is a perspective view of a die-cutting die provided with a ruled line blade according to the present invention.

FIG. 2 is a perspective view of a ruled blade.

3 is a vertical cross-sectional view taken along the line AA of FIG.

FIG. 4 is an explanatory view showing an example of a ruled line blade manufacturing apparatus.

FIG. 5 is a partially cutaway explanatory view of a molding die.

FIG. 6 is an explanatory diagram showing a formation state of a cutout portion.

FIG. 7 is an explanatory diagram showing a state in which a ruled blade is pressed against a plate-like body.

FIG. 8 is an explanatory diagram showing an example of an apparatus that embodies the modified embodiment method.

[Explanation of symbols]

1-Punching die, 5-Plate body, 7-Punching blade, 9-Rule line blade, 11-Plate blade, 11a-Cutting blade, 11b-Notch portion, 11c-Convex curved surface, 25-Molding Mold, 25a-slit, 25b-concave curved mold part

Claims (5)

[Claims] 1. A ruled line blade provided in a die for punching a plate-shaped body into a desired shape by a punching blade and forming a folded portion on the plate-shaped body, the edge of the plate-shaped blade body in a direction orthogonal to the longitudinal direction. A die-cutting ruled line blade in which a cutting blade for forming a notch for folding back and a notch portion for forming a concave portion are alternately formed and a valley portion of the notch portion is formed as a convex curved surface. 2. A ruled line blade for forming a notch and a recess for folding back when a plate-shaped body is punched into a desired shape by a shape-cutting blade, and a plate having a notch blade formed at an edge in a direction orthogonal to the longitudinal direction. The cutting edge and the notch are formed by plastically deforming the edge including the cutting blade by press-contacting the forming die having the concave curved die to the edge of the blade. A method of manufacturing ruled line blades that are alternately formed. 3. A ruled line blade for forming a notch and a recess for folding back when a plate-shaped body is punched into a desired shape by a shape-cutting blade, wherein a concave curve is formed at an edge of the plate-shaped blade in the direction orthogonal to the longitudinal direction. A forming die having a mold is pressure-contacted at predetermined intervals, and the valleys are plastically deformed into the notches having convex curved surfaces to form the notches at predetermined intervals, and then the cutting blade is formed on the remaining part of the edge. Method for manufacturing ruled line blades. 4. The molding die is provided with a slit for inserting and supporting the plate-shaped blade with a longitudinal width corresponding to the cutout portion, and a concave curved die is formed at a valley portion of the slit. 2 or 3 ruled line blade manufacturing method. 5. A molding die is provided with a plurality of slits each having a width in a longitudinal direction corresponding to a notch portion, the slits being inserted through and supporting the plate-shaped blade body, and the valley portions of the slits each having a concave curved die. The method for manufacturing a ruled line blade according to claim 2 or 3, wherein the plate-shaped blade body formed of a mold unit body and having a notch portion is supported at a plurality of points, and the plurality of notch portions are simultaneously formed.