JP2008161987A - Chisel, long band-shaped thin blade and die cutting blade unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chisel having a thin cutting edge, a long band-shaped thin blade and a die cutting blade unit suitable for highly accurate die cutting of sheet products such as plastic films. <P>SOLUTION: In the chisel 1 used for a die for die cutting of sheets, the narrow band-shaped thin blade 12 is erected on a block-shaped base part 11. In the thin blade 12 having symmetrical both side faces, a portion of a predetermined height p from the tip to the base part 11 side is formed to become thin, and a portion from the predetermined height position p to the base part 11 is formed to become thick. The both side faces S1, S2 have steps on the boundary between the thin portion 122 and the thick portion 121. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a blade suitable for punching a sheet of plastic film or the like, and more specifically to an engraving blade, a long strip-shaped thin blade, and a punching blade unit having a thin blade edge.

Sheet products such as plastic films are generally processed by punching a sheet with a punching die. This punching die may be configured by attaching a long strip-shaped thin blade (so-called Thomson blade) or / and an engraving blade to a board.
By the way, recently, there is an increasing demand for ultra-high precision punching by this type of punching die. For example, a sheet product such as a plastic film constituting a display surface of a liquid crystal display may be required to be punched so that a cut portion is extremely sharp (for example, no burrs are generated).

  As shown in the perspective view of FIG. 11 (A), the engraving blade 91 is processed by cutting or the like. The engraving blade 91 is configured such that a thin strip-like blade 913 is erected on a block-like base portion 912. At this time, the base portion 912 is embedded in the board 90 as shown in the usage explanatory diagram of FIG. In the conventional engraving blade 91 shown in FIGS. 11A and 11B, the cutting edge is processed so that the side surface of the thin strip-shaped thin blade 913 is convex. For this reason, if the blade edge 911 is thinned, the lower part of the thin strip-shaped thin blade 913 must be thinned, and the strength of the entire thin strip-shaped thin blade 913 is reduced. Therefore, there is a problem that the cutting edge 911 cannot actually be thinned.

  As shown in the perspective view of FIG. 12 (A), the long strip-shaped thin blade 92 is obtained by polishing long strip-shaped steel with a grinder or the like, and the long strip-shaped thin blade 92 is used in FIG. 12 (B). As shown in FIG. In the conventional long strip-shaped thin blade 92 shown in FIGS. 12A and 12B, the side surface 922 is processed to be convex. For this reason, as shown in FIG. 12C, if the blade edge 921 is thinned, the long strip-shaped thin blade 92 itself must be thinned, and the overall strength is lowered. Therefore, there is a problem that the cutting edge 921 cannot actually be thinned.

  An object of the present invention is to provide a blade suitable for punching a sheet of a plastic film or the like by forming a thin blade edge.

The engraving blade of the present invention has the gist (1) to (5).
(1) An engraving blade used for a sheet punching die, in which a thin strip-like thin blade is erected on a block-like base,
The thin blade is symmetrical on both sides, and a portion extending from a tip toward the base side to a predetermined height is formed thin, and a portion extending from the predetermined height portion to the base is formed thick. Has a step at the boundary between the thin portion and the thick portion.

(2) The ratio of the height from the base to the boundary and the height from the boundary to the tip is 1: 1 to 3: 1, and
The thickness (average thickness when the thickness is different) from the boundary to the tip is 40 to 70 percent of the thickness (average thickness when the thickness is different) from the base to the boundary. The engraving blade according to (1), wherein

(3) An engraving blade used in a sheet punching die, in which a thin strip-like thin blade is erected on a block-like base,
The thin blade is asymmetric on both sides, and a portion extending from the tip toward the base side to a predetermined height is formed thin and a portion extending from the predetermined height portion to the base is formed thick, while one side surface is An engraving blade characterized by being substantially vertical and having the other side surface having a step at the boundary between the thin portion and the thick portion.

(4) The tip has a loop shape in a plan view, and a punched-out product or a punched product delivery hole is formed from the inside of the loop so as to open on a side surface of the base (3). The engraving blade described in

(5) The ratio of the height from the base to the boundary and the height from the boundary to the tip is 1: 1 to 3: 1, and
The thickness from the boundary to the tip (average thickness when the thickness is different) is 30 to 70 percent of the thickness from the base to the boundary (average thickness when the thickness is different). The engraving blade according to (3) or (4), wherein

The long strip-shaped thin blade of the present invention is characterized by (6) to (9).
(6) A long strip-shaped thin blade used for a sheet punching die,
It is symmetrical on both sides, and a portion extending from the tip to the lower end with a predetermined height is formed thin and a portion extending from the predetermined height portion to the lower end is formed with a thickness. A long strip-shaped thin blade characterized by having a step at the boundary with the thick part.

(7) The long strip-shaped thin blade according to (6), wherein a height from the lower end to the tip is 23.6 mm,
The height from the boundary to the tip is 0.5 to 3.0 mm,
The thickness from the lower end to the boundary is 0.45 to 0.70 mm, and the thickness from the boundary to the tip is 30 to 70 percent of the thickness from the lower end to the boundary. A long strip-shaped thin blade characterized by

(8) A long strip-shaped thin blade used for a sheet punching die,
Both sides are asymmetrical, the portion extending from the front end to the lower end with a predetermined height is formed thin, the portion extending from the predetermined height portion to the lower end is formed thick, and one side surface is substantially vertical and the other side surface Has a step at the boundary between the thin portion and the thick portion.

(9) The long strip-shaped thin blade according to (8), wherein a height from the lower end to the tip is 23.6 mm,
The height from the boundary to the tip is 0.5 to 3.0 mm,
The thickness from the lower end to the boundary is 0.45 to 0.70 mm, and the thickness from the boundary to the tip is 30 to 70 percent of the thickness from the lower end to the boundary. A long strip-shaped thin blade characterized by

The punching blade unit of the present invention is characterized by (10) and (11).
(10) A punching blade unit comprising the engraving blade according to (1) or (2) and the long strip-shaped thin blade according to (6) or (7), wherein the tip of the thin blade of the engraving blade A punching blade unit, wherein a tip of the long strip-shaped thin blade is continuous.

(11) A punching blade unit comprising the engraving blade according to any one of (3) to (5) and the long strip-shaped thin blade according to (8) or (9), wherein the thin blade of the engraving blade The punching blade unit is characterized in that the leading end of the long belt-like thin blade is continuous.

  According to the present invention, by devising the shape of the blade edge, the blade edge is thin, and the strength of the entire blade is ensured. Blade) and a punching blade unit.

<< First Embodiment >>
FIG. 1 is an explanatory view showing an embodiment of a double-sided engraving blade, where (A) is a perspective view and (B) is a usage explanatory view. The engraving blade 1 is constituted by a block-like base 11 and a thin strip-like thin blade 12 (in FIG. 1A, a thin blade whose tip is linear in a plan view). The base 11 includes an upper portion 111 on which the thin blade 12 is formed, and a lower portion 112 on which the upper portion 111 is placed. The upper portion 111 is formed of the same hardened steel as the thin blade 12, and the lower portion 112 is Consists of aluminum.

FIG. 1B shows a state where the engraving blade 1 is mounted on the punching die 100.
The upper portion 111 of the base portion 11 is fabricated by being processed by wire cutting, polishing, or the like. Both side surfaces S1, S2 of the thin blade 12 are symmetrical with respect to the center plane (indicated by the vertical line Z passing through the blade tip in FIG. 1B). The thin blade 12 is formed with a thin portion 122 extending from the tip toward the base 11 toward a predetermined height p, and a portion 121 extending from the predetermined height p to the base 11 is formed thick. , S2 has a step at the boundary (that is, p point) between the thin portion 122 and the thick portion 121. In addition, the front-end | tip of the thin blade 12 is processed by the angle of 25 degrees-60 degrees, and the level | step difference (part of p) is processed by the angle of 30 degrees-60 degrees.

  The ratio of the height from the rising portion m of the thin blade 12 to the step (p portion) (thick portion 121) and the height from the step (p portion) to the blade tip (thin portion 122) is 1: 1 to 3. , And the thickness (average thickness if the thickness is different) from the step (part p) to the blade tip is the part from the rising part m to the step (p part). The thickness is preferably 30 to 70 percent of the thickness (thick portion 121) (average thickness when the thickness is different).

Specific examples of the size of the engraving blade 1 will be described with reference to reference signs A to E and H in FIG.
Engraving blade height H = 23.6mm
Height ha of the upper part 111 of the base 11 = 7.6 mm
Height hb = 12 mm of the lower part 112 of the base 11
Height A of thin blade 12 = 4.0 mm
Thickness 121 height B = 3.0mm
Height of thin portion 122 C = A−B = 1.0 mm
Triangle angle of blade edge φ = 42 °
Angle of step (part p) θ = 45 °
Thickness D of thick part 121 = 0.7 mm
Thin portion 122 thickness E = 0.45 mm

<< Second Embodiment >>
FIG. 3 is an explanatory view showing an embodiment of a single-sided engraving blade, where (A) is a perspective view and (B) is a usage explanatory view. The engraving blade 2 is configured by a thin strip-shaped thin blade 22 (a thin blade whose tip is linear in a plan view in FIG. 3A) standing on a block-shaped base 21. The base 21 includes an upper portion 211 on which the thin blade 22 is formed, and a lower portion 212 on which the upper portion 211 is placed. The upper portion 211 is formed of the same hardened steel as the thin blade 22, and the lower portion 212 is Consists of aluminum.

FIG. 3B shows a state where the engraving blade 2 is mounted on the punching die 100.
In the engraving blade 1 of the first embodiment, both side surfaces S1, S2 of the engraving blade 1 are symmetric with respect to the center plane (vertical line Z). However, the engraving blade 2 of the second embodiment has both side surfaces S1, S1. S2 is asymmetric. In the second embodiment, the thin blade 22 is formed such that a portion 222 extending from the tip to the base 21 side and extending over a predetermined height p is thin, and the base 21 (the rising portion m of the thin blade 22 is formed from the portion of the predetermined height p. ), The side surface S1 is substantially vertical, and the other side surface S2 has a step at the boundary between the thin portion and the thick portion (ie, p point). The tip of the thin blade 22 is processed at an angle of 25 ° to 60 °, and the step (part p) is processed at an angle of 30 ° to 60 °.

  Also in this embodiment, the ratio of the height from the rising portion m of the thin blade 22 to the step (p portion) (thick portion 221) and the height from the step (p portion) to the blade tip (thin portion 222) 1: 1 to 3: 1, and the thickness (average thickness when the thickness is different) from the step (part p) to the blade tip (average thickness if the thickness is different) from the rising part m to the step (p 30 to 70 percent of the thickness (average thickness when the thickness is different) of the portion (thick portion 221) up to the portion).

Specific examples of the size of the engraving blade 2 will be described with reference to reference signs A to E and H in FIG.
Engraving blade 2 height H = 23.6mm
Height ha of the upper part 211 of the base 21 = 7.6 mm
Height hb = 12 mm of the lower part 212 of the base 21
Height A of thin blade 22 = 4.0 mm
Thickness 221 height B = 3.0 mm
Height of thin portion 222 C = A−B = 1.0 mm
Angle of the triangular edge of the blade φ = 51 °
Angle of step (part p) θ = 45 °
Thickness D of thick part 221 = 0.7 mm
Thin portion 222 thickness E = 0.45 mm

<< Third Embodiment >>
5A and 5B are explanatory views showing another embodiment of a single-sided engraving blade, where FIG. 5A is a perspective view and FIG. 5B is a cross-sectional view. In the engraving blade 2 of the second embodiment, the tip of the thin blade 22 has a linear shape in plan view, but in the engraving blade 3 of this embodiment, the thin blade 32 has a tip shape of loop in plan view, and from the inside of the loop. , A hole H for punching or sending out a punched product is formed so as to open on the side surface of the base 31. In this embodiment, the base 31 is a rectangular parallelepiped block, and is open on three of the four side surfaces. In other words, the base 31 of the engraving blade 3 of the present embodiment has a U-shape having a flange 311, a back plate 312, and a floor plate 313, and a hole H is formed in the flange (portion corresponding to the canopy) 311. A thin blade 32 is erected around the hole H. Further, the floor plate 311 is inclined so that the back plate 312 side becomes higher. In the present embodiment, since the hole H is cut out by wire cutting, the hole of the floor plate 311 generated by cutting out is filled with the filler 33.

  This embodiment can be applied to both the case where the punched sheet piece is a product and the case where the portion excluding the punched sheet piece is a product. In addition, the size and shape of the loop can be adopted as appropriate, and the punched sheet piece can be accommodated in a space in the box with the base made into a box shape. It can also be taken out. Furthermore, it is also possible to provide a single engraving blade with a plurality of thin blades whose tips are loop-like in plan view, and simultaneously punch a plurality of sheet pieces.

<< 4th Embodiment >>
FIG. 6 is an explanatory view showing an embodiment of a long strip-shaped thin blade (Thomson blade) processed on both sides, (A) is a partial perspective view, and (B) is a usage explanatory view. In FIG. 6 (A), the long strip-shaped thin blade 4 is shown as a straight line in a plan view, and FIG. 6 (B) shows a state where it is attached to the punching die 100.

  The long strip-shaped thin blade 4 is configured by polishing a quenched steel plate, and both side surfaces S1 and S2 are symmetrical with respect to the center plane (indicated by the vertical line Z passing through the blade tip in FIG. 6B). It has become. The long strip-shaped thin blade 4 is formed with a thin portion 42 extending from the tip to the lower end and extending from a predetermined height p, and a portion 41 extending from the predetermined height p to the lower end is formed thick. , S2 has a step at the boundary (that is, p point) between the thin portion 42 and the thick portion 41. In addition, the front-end | tip of the long strip | belt-shaped thin blade 4 is processed by the angle of 25 degrees-60 degrees, and the level | step difference (part of p) is processed by the angle of 30 degrees-60 degrees.

  When the height from the lower end to the tip is 23.6 mm, the long strip-shaped thin blade 4 has a height from the boundary p to the tip (thin portion 42) from 0.5 to 3.0 mm, from the lower end to the border p. The thickness of the part (thick part 41) is 0.45 to 0.70 mm, and the part from the boundary p to the tip (thin part 42) is the thickness of the part from the lower end to the boundary p (thick part 41). The thickness is preferably 30 to 70 percent.

Specific examples of the size of the long belt-like thin blade 4 will be shown with reference to symbols A to E in FIG.
Height A of long strip-shaped thin blade 4 = 23.6 mm
Thickness 41 height B = 21.6mm
The height of the thin portion 42 C = A−B = 2.0 mm
The angle φ = 42 ° at the tip of the long thin ribbon blade 4
Angle of step (part p) θ = 45 °
Thickness D of thick part 41 = 0.7 mm
The thickness E of the thin portion 42 is 0.45 mm.

<< 5th Embodiment >>
FIG. 8 is an explanatory view showing an embodiment of a long strip-shaped thin blade (Thomson blade) processed on one side, (A) is a perspective view, and (B) is a usage explanatory view. In FIG. 8A, the long strip-shaped thin blade 5 is shown as a straight line in a plan view, and FIG. 8B shows a state where it is attached to the punching die 100.

  In the long strip-shaped thin blade 5 of the fourth embodiment, both side surfaces S1, S2 are symmetric with respect to the center plane (vertical line Z), but the long strip-shaped thin blade 5 of the present embodiment has both side surfaces S1, S2. Is asymmetric. In the present embodiment, one side surface S1 is substantially vertical, and the other side surface S2 has a step at the boundary between the thin portion and the thick portion, and the portion 52 extending from the tip to the lower end and extending over a predetermined height p is thin. At the same time, the portion 51 extending from the predetermined height portion p to the lower end is formed thick, and the other side surface S2 has a step at the boundary between the thin portion 52 and the thick portion 51 (that is, p point). In addition, the front-end | tip of the long strip | belt-shaped thin blade 5 is processed into the angle of 25 degrees-60 degrees, and the level | step difference (part of p) is processed into the angles of 30 degrees-60 degrees.

  Also in this embodiment, when the height from the lower end to the tip is 23.6 mm, the long strip-shaped thin blade 5 has a height (thin portion 52) from the boundary p to the tip of 0.5 to 3.0 mm, The thickness from the lower end to the boundary p (thick portion 51) is 0.45 to 0.70 mm, and the thickness from the boundary p to the tip (thin portion 52) is the thickness from the lower end to the boundary p (thickness). The thickness is preferably 30 to 70 percent of the thickness of the thick portion 51).

A specific example of the size of the long strip-shaped thin blade 5 will be shown with reference to symbols A to E in FIG.
Height A of long strip-shaped thin blade 5 = 23.6 mm
Height B of thick part 51 = 21.6mm
Height of thin portion 52 C = A−B = 2.0 mm
The angle φ = 51 ° at the tip of the long thin ribbon blade 5
Angle of step (part p) θ = 45 °
Thickness D of thick part 51 = 0.7 mm
The thickness E of the thin portion 52 is 0.45 mm.

<< 6th Embodiment >>
FIG. 10 is an explanatory view showing an embodiment of a unit of a punching blade including the engraving blade 1 described in the first embodiment and the long strip-shaped thin blade 4 described in the fourth embodiment.

  In the present embodiment, a long groove is formed in the groove (two grooves G1 and G2 in FIG. 10) formed in the engraving blade 1 so that the tip of the thin blade 12 of the engraving blade 1 and the tip of the long strip-shaped thin blade 4 are continuous. The end of the thin strip-like thin blade 4 is attached. In addition, in FIG. 10, illustration of the elongate thin blade 4 attached to the groove | channel G2 is abbreviate | omitted for convenience of explanation.

  Although not shown in the drawing, a specific example in the case of forming a punching blade unit from the engraving blade 2 described in the second embodiment and the long strip-shaped thin blade 6 described in the fifth embodiment is the same as shown in FIG. is there.

It is explanatory drawing which shows embodiment of the engraving blade which carried out double-sided processing, (A) is a perspective view, (B) is use explanatory drawing. It is a figure which shows the specific example of the size of the engraving blade of FIG. It is explanatory drawing which shows embodiment of the sculpture blade which carried out the single side | surface process, (A) is a perspective view, (B) is use explanatory drawing. It is a figure which shows the specific example of the size of the engraving blade of FIG. It is explanatory drawing which shows other embodiment of the single-sided engraving blade, (A) is a perspective view, (B) is sectional drawing. It is explanatory drawing which shows embodiment of the elongate strip-shaped thin blade (Thomson blade) processed on both surfaces, (A) is a fragmentary perspective view, (B) is use explanatory drawing. It is a figure which shows the specific example of the size of the elongate strip-shaped thin blade of FIG. It is explanatory drawing which shows embodiment of the long strip | belt-shaped thin blade (Thomson blade) processed on the single side | surface, (A) is a perspective view, (B) is use explanatory drawing. It is a figure which shows the specific example of the size of the elongate strip-shaped thin blade of FIG. It is explanatory drawing which shows embodiment of the unit of the punching blade which consists of the engraving blade described in 1st Embodiment, and the elongate strip-shaped thin blade described in 4th Embodiment. (A) is a perspective view which shows the conventional engraving blade, (B) is a use explanatory drawing of the engraving blade of (A). (A) is a perspective view which shows the conventional long strip-shaped thin blade, (B) is a use explanatory drawing of the long strip-shaped thin blade of (A), (C) is a clear figure at the time of making a long strip-shaped thin blade thin.

Explanation of symbols

1,2,3 Engraving blade 4,5 Long strip-shaped thin blade 11,21,31 Base 12, 22,32 Thin blade 33 Filler 41,51 Thick part 42,52 Thin part 100 Punching die 121,221 Thick part 122 , 222 Thin portion 311 庇 312 Back plate 313 Floor plate G1, G2 Groove m Thinning edge p Boundary between thin portion and thick portion S1, S2 Side surface Z Vertical line

Claims (11)

An engraving blade used for a sheet punching die, in which a thin strip-like thin blade is erected on a block-shaped base,
The thin blade is symmetrical on both sides, and a portion extending from a tip toward the base side to a predetermined height is formed thin, and a portion extending from the predetermined height portion to the base is formed thick. Has a step at the boundary between the thin portion and the thick portion. The ratio of the height from the base to the boundary and the height from the boundary to the tip is 1: 1-3: 1; and
The thickness from the boundary to the tip (average thickness when the thickness is different) is 40 to 70 percent of the thickness from the base to the boundary (average thickness when the thickness is different). The engraving blade according to claim 1. An engraving blade used for a sheet punching die, in which a thin strip-like thin blade is erected on a block-shaped base,
The thin blade is asymmetric on both sides, and a portion extending from the tip toward the base side to a predetermined height is formed thin and a portion extending from the predetermined height portion to the base is formed thick, while one side surface is An engraving blade characterized by being substantially vertical and having the other side surface having a step at the boundary between the thin portion and the thick portion.   The said front end is a planar view loop shape, and it is formed so that the hole for extraction waste or extraction product delivery may be opened in the side surface of the said base from the inner side of the said loop. Engraving blade. The ratio of the height from the base to the boundary and the height from the boundary to the tip is 1: 1-3: 1; and
The thickness from the boundary to the tip (average thickness when the thickness is different) is 30 to 70 percent of the thickness from the base to the boundary (average thickness when the thickness is different). The engraving blade according to claim 3 or 4, characterized in that. A long strip-shaped thin blade used for a sheet punching die,
It is symmetrical on both sides, and a portion extending from the tip to the lower end with a predetermined height is formed thin and a portion extending from the predetermined height portion to the lower end is formed with a thickness. A long strip-shaped thin blade characterized by having a step at the boundary with the thick part. The height from the lower end to the tip is 23.6 mm, the long strip-shaped thin blade according to claim 6,
The height from the boundary to the tip is 0.5 to 3.0 mm,
The thickness from the lower end to the boundary is 0.45 to 0.70 mm, and the thickness from the boundary to the tip is 30 to 70 percent of the thickness from the lower end to the boundary. A long strip-shaped thin blade characterized by A long strip-shaped thin blade used for a sheet punching die,
Both sides are asymmetrical, the portion extending from the front end to the lower end with a predetermined height is formed thin, the portion extending from the predetermined height portion to the lower end is formed thick, and one side surface is substantially vertical and the other side surface Has a step at the boundary between the thin portion and the thick portion. The height of the long strip-shaped thin blade according to claim 8, wherein a height from the lower end to the tip is 23.6 mm.
The height from the boundary to the tip is 0.5 to 3.0 mm,
The thickness from the lower end to the boundary is 0.45 to 0.70 mm, and the thickness from the boundary to the tip is 30 to 70 percent of the thickness from the lower end to the boundary. A long strip-shaped thin blade characterized by A punching blade unit comprising the engraving blade according to claim 1 or 2 and the long strip-shaped thin blade according to claim 6 or 7,
A punching blade unit, wherein a tip of a thin blade of the engraving blade and a tip of the long strip-shaped thin blade are continuous. A punching blade unit comprising the engraving blade according to any one of claims 3 to 5 and the long strip-shaped thin blade according to claim 8 or 9,
A punching blade unit, wherein a tip of a thin blade of the engraving blade and a tip of the long strip-shaped thin blade are continuous.

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