JP6600554B2 - Corrugated sheet material cutting method - Google Patents

Description

  The present invention relates to a corrugated sheet material cutting method. More specifically, the present invention relates to a method of cutting a rubber-like elastic sheet material provided with at least one continuous corrugated portion with a cutting blade.

For example, a door hole seal 1 is provided between an inner panel of an automobile door and a door trim provided on the inner side of the automobile door in order to improve soundproof performance and ensure good waterproofness.
As shown in FIGS. 4 to 6, a type of door hole seal 1 is known in which the material is made of a rubber-like elastic body and the corrugated uneven portions 10 are continuously formed on the surface (patent) Reference 1).

  As shown in FIG. 4, such a door hole seal 1 is formed by cutting a plate-like sheet material 100 having a concavo-convex portion 10 continuously formed on a surface thereof into a linear cut shape as shown in FIGS. 7 and 8. The blade 2 and the curved cut blade 3 are combined and punched to obtain a target shape.

JP 2006-145637 A

At this time, there is no particular problem when the cutting blade 2 has an angle substantially parallel to the wave traveling direction (y direction) of the corrugated uneven portion 10, but the wave traveling direction (y direction) of the uneven portion 10. ) When cutting at a small angle of about 0 to 10 degrees in the horizontal direction with respect to the direction orthogonal to the direction (x direction), as shown in FIG. The remaining part J may occur.
When the uncut portion J occurs, the appearance is poor. Therefore, in the past, whether the uncut portion J exists or not is inspected one by one, and if there is the uncut portion J, the length L is 15 mm or less. It was removed manually.

  Therefore, the object of the present invention is to obtain a corrugated sheet material cutting method capable of cutting a rubber-like elastic sheet material provided with a continuous corrugated uneven portion without deteriorating the appearance. That is.

In order to achieve the above object, the corrugated sheet material cutting method of the present invention cuts a sheet material (100) of a rubber-like elastic body in which a continuous corrugated portion (10) is formed on at least one surface (100a). A method of cutting with a blade (200),
The cutting blade (200) has a continuous waveform in plan view, and the sheet material (100) or the cutting blade (200) is pressed against the fixed cutting blade (200) or the sheet material (100). Thus, the sheet material (100) is cut into a predetermined shape.

  Further, according to the present invention, the waveform of the cutting blade (200) is a sawtooth wave, and a vertical distance (wave height) T from the trough (201) to the peak (202) is formed on the sheet material (100). The vertical distance (100H) from the wave valley (101) to the mountain (102) is equal to or greater.

  Further, the present invention is characterized in that the angle (θ) extending from the wave valley (201) to the peak (202) of the cutting blade (200) is 10 degrees or more and less than 90 degrees.

  Further, according to the present invention, a whisker-like uncut portion (J) that can generate one side length (200K) of the substantially linear portion included in the waveform of the cutting blade (200) in the sheet material (100). The allowable limit length (L) or less is used.

  Note that symbols in parentheses indicate corresponding elements or corresponding matters described in the drawings and modes for carrying out the invention described later.

According to the present invention, the rubber-like elastic sheet material having the undulating portion of the continuous waveform formed on one side or both front and back surfaces is pressed against the fixed cutting blade, or the cutting blade is fixed to the fixed sheet material. Since the cutting blade has a continuous waveform in plan view, the cutting blade is in a direction (x direction) perpendicular to the wave traveling direction (y direction) of the uneven portion formed in the sheet material. On the other hand, in the horizontal direction, they are not touched by a line but touched by a point.
Therefore, even if the surface of a soft material such as a rubber-like elastic body has a concave and convex portion with a continuous waveform, it can be cut beautifully while suppressing the occurrence of a beard-like uncut portion at the cut end. .
Therefore, it is possible to suppress a troublesome operation of carefully inspecting a sheet material after cutting, which is a product, for example, a door hole seal, or removing a found uncut portion manually.

  For example, Japanese Patent Application Laid-Open No. 49-19393, Japanese Patent No. 5023629, Japanese Patent No. 4485748, Japanese Utility Model Registration No. 3089399, Japanese Patent Application Laid-Open No. 2011-16215 have a waveform formed on the cut side. Although disclosed in publications and the like, as in the present invention, a method of cutting a rubber-like elastic sheet material having a continuous corrugated uneven portion using a continuous corrugated cutting blade has been conventionally used. It doesn't exist at all.

  In addition, as in the present invention, the waveform of the cutting blade is a sawtooth wave, and the vertical distance from the trough to the peak of the wave is greater than the vertical distance from the trough to the peak of the corrugation formed on the sheet material. A whisker-like cut that can be generated in the sheet material by increasing the angle extending from the valley to the mountain to 10 degrees or more and less than 90 degrees, or generating one side length of the substantially linear part included in the corrugation of the cutting blade. By setting the length to be equal to or less than the allowable limit length of the remaining portion, it is possible to further suppress the occurrence of uncut portions in the sheet material and improve the appearance of the manufactured product.

It is a top view which shows the front-end | tip of the cutting blade used for the cutting method of the corrugated sheet material which concerns on embodiment (Embodiment 1) of this invention. It is the Z section enlarged plan view of FIG. It is a top view which shows the door hole seal cut | judged by the cutting method of the corrugated sheet material which concerns on embodiment (Embodiment 1) of this invention. It is a top view which shows the corrugated sheet material before cutting. It is a top view which shows the doorhole seal cut | judged by the cutting method of the corrugated sheet material which concerns on a prior art example. It is a partial cross-section expansion perspective view in the AA line of FIG. It is a top view which shows the front-end | tip of the cutting blade used for the cutting method of the corrugated sheet material which concerns on a prior art example. It is a top view which shows the front-end | tip of the curved cutting blade used for the cutting method of the corrugated sheet material concerning a prior art example. It is a top view which shows the front-end | tip of the cutting blade used for the cutting method of the corrugated sheet material which concerns on another embodiment (Embodiment 2) of this invention. It is the A section enlarged plan view of FIG.

  With reference to FIG. 1 thru | or FIG. 4, the cutting method of the corrugated sheet | seat material which concerns on embodiment (Embodiment 1) of this invention is demonstrated. This is because the rubber-like elastic sheet material 100 having the continuous corrugated portion 10 formed on one side 100a as shown in FIG. 6 is partially used by the cutting blade 200 shown in FIG. 1 and FIG. In this case, the sheet material 100 is cut and the door hole seal 5 provided in the automobile door is manufactured. The same parts as those shown in the conventional example are denoted by the same reference numerals.

As shown in FIGS. 1 and 2, the cutting blade 200 has a waveform in which the tip of the blade is continuous in a plan view.
More specifically, the waveform at the tip of the cutting blade 200 is a sawtooth wave, and one of the waves is an isosceles triangle in plan view. Further, the vertical distance from the wave valley 201 to the peak 202, that is, the wave height T is set to be equal to or greater than the vertical distance 100H (FIG. 6) from the corrugated valley to the peak formed in the sheet material 100, and the sheet material 100 is cut once. One cycle of the waveform can be cut. In addition, the angle θ extending from the wave valley 201 to the peak 202 of the cutting blade 200 is set to be 10 degrees or more and less than 90 degrees, thereby preventing the uncut portion J from occurring. Here, it is set to 35 degrees. Note that when the angle θ approaches 90 degrees, the uncut portion J does not occur, but after cutting, many waveforms having a large angle are formed at the end portion of the door hole seal 5, so that the appearance is poor. On the contrary, if the angle θ approaches 10 degrees, the degree of occurrence of the uncut portion J increases, but a small waveform is formed at the end of the door hole seal 5 so that the appearance is good. Therefore, from the viewpoint of improving the appearance and reducing the degree of occurrence of the uncut portion J, the angle θ is preferably 20 degrees or more and 70 degrees or less, and more preferably 25 degrees or more and 60 degrees or less. preferable.
Furthermore, the one side length 200K of the substantially linear portion in the waveform of the cutting blade 200 is set to the allowable limit length L of the whisker-like uncut portion J that can be generated in the sheet material 100, here 15 mm or less, Even if the uncut portion J occurs, the allowable limit length L or less is set so as not to deteriorate the appearance.

  The rubber-like elastic body used as the material of the sheet material 100 includes various rubber materials such as EPDM rubber, thermoplastic elastomer, etc., but any elastic body such as rubber may be used. Further, although it may be a sponge material or a solid material, it is a sponge material in which the uncut portion J as shown in FIG. This is particularly effective for flexible materials.

  The cutting blade 200 is embedded and fixed so as to protrude from a base surface (not shown) installed when cutting the sheet material 100, but the end portion cut by the corrugated cutting blade 200 is corrugated. In this embodiment, the cutting blade 200 is not used for the entire circumference of the target door hole seal 5 but is used partially, and the remaining portion is a straight cutting blade 2 or a curved cutting blade. 3 are connected in a linear shape, and these are integrally embedded in the base surface so as to be a closed region as a whole.

  That is, when the door hole seal 5 is cut from the sheet material 100, when the angle is substantially parallel to the wave traveling direction (y direction) of the corrugated uneven portion 10, as shown in FIGS. Since the uncut portion J does not occur even if it is cut with the straight cutting blade 2, the straight cutting blade 2 is used as it is or with a curved cutting blade 3 that is slightly curved (see FIG. 3, the range indicated by S 1, S 2, S 3, S 4), the uncut portion with respect to the direction (x direction) perpendicular to the wave traveling direction (y direction) of the concavo-convex portion 10 formed on the sheet material 100. Since J is likely to occur, the corrugated cutting blade 200 is used as it is or in a slightly curved state (range indicated by N1, N2, N3, and N4 in FIG. 3).

According to this, the cutting blade 200 does not touch the line in the horizontal direction with respect to the direction (x direction) orthogonal to the wave traveling direction (y direction) of the concavo-convex portion 10 formed on the sheet material 100. Since the contact is made at a point, a whisker-like uncut portion J occurs at the cut end even if the continuous corrugated portion 10 is formed on the surface of a soft material such as a rubber-like elastic body. It is possible to cut it cleanly while suppressing this.
Therefore, it is possible to carefully inspect the door hole seals 5 after cutting, which are products, and to avoid troublesome work such as removing the uncut portion J manually.

  In the present embodiment, the angle θ extending from the wave valley 201 to the peak 202 of the cutting blade 200 is set to 35 degrees. However, even if the angle θ is 10 degrees or more but smaller than 35 degrees, the cutting blade 200 If one side length 200K is less than or equal to the permissible limit length L, there is no problem even if a whisker-like uncut portion J occurs, and the corrugated portion formed in the cut end shape of the door hole seal 5 thereby. Can be made inconspicuous. On the other hand, when the angle is larger than 35 degrees, the beard-like uncut portion J is hardly generated, but the appearance is deteriorated. Accordingly, various cutting blades 200 having different sizes and the linear cutting blade 2 can be combined in various ways.

Here, the second embodiment will be described.
In the first embodiment, the waveform of the tip of the cutting blade 200 is bent with a sharp angle that always intersects with the extending direction of the cutting blade 200, but in the second embodiment, a portion of the sawtooth wave of the first embodiment is included. In particular, a parallel portion 203 substantially parallel to the extending direction of the cutting blade 200 is combined. For example, in FIG. 9, the parallel part 203 is provided alternately with the saw blade with a sharp tip. By doing in this way, compared with the case where it cuts with the saw blade which has a sharp edge continuously as shown in FIG. 1, the sharply angled part decreases, and the appearance of the sheet | seat 100 cut | judged looks Can be improved. Even in this case, as shown in FIG. 10, the vertical distance from the wave valley to the mountain, that is, the wave height T is set to be equal to or greater than the vertical distance 100H (FIG. 10) from the wave valley to the mountain formed on the sheet material 100. ing. Further, the blade length 203K of the parallel portion 203 is set to be equal to or less than the allowable limit length L of the beard-like uncut portion J that can be generated in the sheet material 100. Therefore, even if the beard-like uncut portion J occurs in the parallel portion 203, there is no problem. Further, the length of one side 200K of the substantially linear oblique side portion is also set to be equal to or less than the allowable limit length L of the whisker-like uncut portion J that can be generated in the sheet material 100 as in the first embodiment (FIG. 2). Yes. It is particularly effective when the angle θ is made small that the length of one side length 200K of the hypotenuse portion is equal to or less than the allowable limit length L.

1, 2, 9, and 10, one of the waves is an isosceles triangle in plan view, but it is not necessary to be an isosceles triangle; The two angles θ seen in may be different angles. Further, the wave shape extending in the extending direction of the cutting blade 200 need not be the same shape, and different shapes may be combined.
Moreover, although the bent part of Embodiment 1 and Embodiment 2 has a corner | interval which intersected linearly, you may make this into smooth circular arc shape.

  In addition, the sheet material 100 is pressed against the fixed cutting blade 200, but conversely, the cutting blade 200 can be moved and pressed against the fixed sheet material 100.

  Moreover, in this embodiment, the door provided between the inner panel of a motor vehicle door and the door trim provided in the vehicle interior from the sheet | seat 100 of the rubber-like elastic body in which the uneven | corrugated | grooved part 10 of the continuous waveform was provided in the single side | surface. Although the method for cutting the hole seal 5 has been described, the present invention is not limited to this, and the rubber-like elastic sheet material 100 in which the continuous corrugated concavo-convex portion 10 is provided on at least one side (and may be both sides) is cut. Thus, the present invention can be applied to products for manufacturing some products (not limited to those used in automobiles), and according to this, it is possible to prevent the uncut portion J from occurring at the cut end of the cut product. be able to.

  In the above-described embodiment, the sheet material 100 is cut into a predetermined shape to adjust the outer shape of the product. However, the cutting includes an act of simply slitting the sheet material 100.

DESCRIPTION OF SYMBOLS 1 Door hole seal 2 Cut blade 5 Door hole seal 10 Concavity and convexity 100 Sheet material 100a Surface (single side)
100b Back surface 100H Sheet valley depth (vertical distance of sheet)
200 Cut blade 200K Length of one side of the substantially linear portion in the waveform 201 Valley 202 Mountain 203 Parallel portion 203K Wave length of parallel portion J Uncut portion L Length T Vertical distance (wave height)

Claims (4)

A method of cutting a sheet material of a rubber-like elastic body having a concavo-convex portion of a continuous waveform formed on at least one side with a cutting blade,
The cutting blade has a continuous waveform in a plan view, and the sheet material is cut into a predetermined shape by pressing the sheet material or the cutting blade against the fixed cutting blade or the sheet material. Cutting method of corrugated sheet material.   The waveform of the cutting blade is a sawtooth wave, and the vertical distance (wave height) from the trough of the wave to the peak is set to be equal to or greater than the vertical distance from the trough of the corrugated wave formed on the sheet material. The corrugated sheet material cutting method according to claim 1.   The corrugated sheet material cutting method according to claim 1 or 2, wherein an angle extending from a wave trough to a mountain of the cutting blade is 10 degrees or more and less than 90 degrees.   The length of one side of the substantially linear portion included in the waveform of the cutting blade is set to be equal to or less than an allowable limit length of a whisker-like uncut portion that can be generated in the sheet material. The corrugated sheet material cutting method according to any one of 3.