JP2005144607A - Template for punch die - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a template superior in flatness by reducing a warp and deformation. <P>SOLUTION: This template B<SB>1</SB>is formed by adhering by pressurization by laminating a plurality of plywood 1. The template B<SB>1</SB>for reducing the warp and the deformation is provided by using the plywood 1 of removing residual stress by forming a plurality of strips of grooves 2 on one surface in the residual plywood 1 except for the obverse-reverse plywood 1 of the template B<SB>1</SB>. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a stamping die template for punching a sheet such as a cardboard sheet or cardboard into a predetermined shape.

  There are two types of die cutters for punching a sheet such as a corrugated cardboard sheet into a predetermined shape. A punching die having a flat plate is used for a flat die cutter, while a punching die having a circular arc is used for a rotary die cutter.

FIG. 8 shows a punching die A ₀ used for a rotary die cutter. This punching die A ₀ is formed by forming a blade mounting groove 12 or a ruled mounting groove (not shown) on a mold plate 11 which is formed into an arc shape by a laser cutter, and press-fitting the blade mounting groove 12 into a thin-walled strip-shaped cutting tool 13. The crease member is attached by press-fitting into the crease attachment groove.

Generally, the template 11 of the punching die A ₀ is composed of a laminated plywood in which a plurality of plywoods 14 are laminated and bonded. This laminated plywood is formed by pre-clamping with a cold press and then main-clamping with a hot press, and is formed into an arc shape at the time of the pressing.

  The punching die template set in the flat plate type die cutter is also formed in the same manner as described above, and is different only in that it is formed into a flat plate shape during pressing.

  Here, the plywood 14 forming the template 11 has a structure in which a plurality of single plates are laminated and bonded by pressing, and each single plate is a combination in which the direction of the fiber is orthogonal to the adjacent single plate. It is said that.

By the way, the plywood 14 that forms the template 11 of the punching die A ₀ has a structure in which a single plate is laminated and bonded by pressure as described above, and therefore stress often remains inside during formation. . Also, stress is generated inside due to evaporation of moisture due to drying after formation and expansion and contraction due to temperature change, and warpage and deformation are caused by the internal stress and residual stress.

  Since the template 11 in the punching die has a structure in which a plurality of plywoods 14 having warpage and deformation as described above are laminated and bonded, a large stress remains inside. In particular, the arc-shaped template 11 is a flat plate. In order to forcibly form the shaped plywood 14 into an arc shape, a very large stress remains, and after the template is formed due to the residual stress, the template 11 is deformed, and the mold plate having a constant curvature radius and high dimensional accuracy. Can't get.

  For this reason, when the template 11 is set on the rotary cylinder in order to form the blade attachment groove and the ruled attachment groove by the laser cutter, as shown in FIG. 9, the outer periphery of the rotary cylinder 15 and both ends in the circumferential direction of the template 11 are provided. A gap 16 is formed between them, or as shown in FIG. 10, a gap 17 is formed between the outer periphery of the rotary cylinder 15 and the central portion in the circumferential direction of the template 11 to obtain a set state in which the gap is in close contact with the outer periphery of the rotary cylinder 15. It is not possible to form a groove with high dimensional accuracy.

  Further, the flat template is also deformed by residual stress, and a groove with high dimensional accuracy cannot be formed as described above.

  Accordingly, when a punching die is formed by attaching a punching blade or a ruled member to such a template, there arises a problem that a punched product with high dimensional accuracy cannot be obtained.

  An object of the present invention is to obtain a flat template plate having excellent flatness with little warpage and deformation, and an arc-shaped template plate having a high dimensional accuracy with a constant curvature radius.

  In order to solve the above-mentioned problems, in the present invention, a plurality of plywoods are laminated, and in a punching die template made of laminated plywood, a large number are provided on at least one side of the remaining plywood other than the front and back plywoods. A configuration in which a narrow groove of the strip was formed was adopted.

  Here, the laminated plywood may be flat or arcuate.

  In the template according to the present invention, the width dimension, depth, and interval of the grooves formed in the plywood are appropriately determined according to the thickness and rigidity (bending rigidity) of the plywood. This groove may be a linear groove extending in the fiber direction (composite length direction) of the end plate on the groove forming side of the plywood, or a direction orthogonal to the fiber direction of the end plate (width direction of the plywood). It may be a linear groove extending in a straight line. Further, it may be an inclined linear groove extending obliquely with respect to the fiber.

  The linear grooves as described above may be formed in combination with linear grooves having different directions.

  As described above, by forming a plurality of grooves on at least one surface of the front and back plywoods among the plurality of plywoods forming the template, the stress remaining inside during plywood formation can be removed or alleviated.

  For this reason, when a plurality of plywoods are stacked and bonded together by pressure to form a flat template, a template with very little residual stress will be formed, and flatness without warping or deformation will be obtained. An excellent template can be obtained.

  Also, by forming grooves in the plywood, residual stress can be removed or alleviated, and at the same time the bending rigidity is lowered and it becomes easier to bend. When an arc-shaped template is formed by molding, a template with very little residual stress is formed, and an arc-shaped template having a predetermined radius of curvature and high dimensional accuracy can be obtained.

  Therefore, when a blade attachment groove or a ruled attachment groove is formed on such a flat mold plate or arc shaped mold plate by a laser cutter, grooves with high dimensional accuracy can be formed. A punching die that can form a very good punched product can be obtained by attaching a ruled member.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3 show a first embodiment of a stamping die template according to the present invention. As shown, the template B ₁ is composed of a plurality of plywoods 1.

As shown in FIG. 2, the plywood 1 has a structure in which a plurality of single plates a _{1 to} a ₃ are laminated so that the directions of the fibers are orthogonal and bonded by pressing, and stress is generated inside by the pressing and bonding. In this case, the plywood 1 is warped or deformed due to the residual stress. The plurality of plywoods 1 are laminated as shown in FIG. 1 and bonded by pressure to form a laminated plywood.

In the template B ₁ made of laminated plywood, a plurality of linear grooves 2 are formed on one side of the remaining plywood 1 excluding the front and back plywood 1 as shown in FIGS. Yes.

  Here, the groove 2 may extend in the length direction of the plywood 1 or may extend in the width direction of the plywood 1.

As described above, by forming the groove 2 on one surface of the plywood 1, in the case of the plywood 1 having residual stress, the residual stress is removed or alleviated. For this reason, as shown in FIG. 4, the residual stress is extremely reduced by laminating and stacking between two plywoods 1 where no groove is formed, and adhering via an adhesive previously applied by pressure. A small template B ₁ can be formed, and an excellent flat template B ₁ with very little warpage and deformation can be obtained.

For this reason, when the cutter mounting groove or the ruled mounting groove is formed on the template B ₁ by the laser cutter, it is possible to process grooves with high dimensional accuracy, and by attaching the punching cutter or the ruled member to these grooves. Therefore, it is possible to form a punching die with high punching dimensional accuracy.

  In the example shown in FIG. 3, the groove 2 extending in the length direction or the width direction of the plywood 1 is formed on one surface of the plywood 1. However, the groove 2 is not limited to this. For example, as shown in FIG. 5, the plywood 1 may be composed of a combination of a groove 2 extending in the length direction and a groove 2 extending in the width direction, or an inclination extending in an oblique direction as shown in FIG. 6. It may consist of a groove. Further, the groove 2 may be provided on both surfaces of the plywood 1.

  The width dimension, depth, and interval of the groove 2 as described above are appropriately determined according to the thickness and rigidity of the plywood 1.

FIG. 7 shows a second embodiment of a stamping die template according to the present invention. Template B ₂ shown in this second embodiment shows a mold plate B ₂ is set to the rotary die cutter, a groove plurality of the single-sided groove 2 is formed between the plywood 1 two is not formed The plywood 1 is arranged and stacked, and is pressed by a press such as a hot press to be formed into an arc shape, and at the same time, is bonded through a pre-applied adhesive.

  Here, as the plurality of plywoods 1 arranged between the front and back plywoods 1, the plywoods 1 shown in FIGS. 3, 5, and 6 are used. Since the plywood 1 has grooves 2 formed on the entire surface, residual stress is removed or alleviated and bending can be easily performed. Therefore, stress is hardly generated inside the bending process. .

For this reason, it is possible to obtain an arc-shaped template B ₂ with extremely little residual stress and high dimensional accuracy by forming and adhering a plurality of laminated plywoods 1 in an arc shape.

Therefore, it is possible to form grooves with high dimensional accuracy by forming the blade attachment grooves and the ruled attachment grooves on the template B ₂ with a laser cutter, and punching by attaching a punching blade or a ruled member to these grooves. A punching die for a rotary die cutter with high dimensional accuracy can be formed.

Sectional drawing which shows 1st Embodiment of the template for punching molds concerning this invention Sectional drawing of the plywood used at the time of formation of the template shown in FIG. Perspective view showing an example of grooved plywood 1 is an exploded perspective view of the template shown in FIG. Perspective view showing another example of grooved plywood Perspective view showing still another example of plywood with grooves Sectional drawing which shows 2nd Embodiment of the template for punching molds concerning this invention Sectional view showing a conventional punching die template Side view of a conventional template set on the cylinder of a laser cutter Side view of a conventional template set in a laser cutter cylinder

Explanation of symbols

1 Plywood 2 Groove

Claims (3)

  In a punching die template comprising a laminated plywood laminated and bonded, a plurality of narrow grooves are formed on at least one side of the remaining plywood other than the front and back plywood. Template for punching dies.   2. The punching die template according to claim 1, wherein the laminated plywood has a flat plate shape.   The punching die template according to claim 1, wherein the laminated plywood has an arc shape.

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