JP2011036921A - Cutting method of prepreg tape and slitter device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce wasteful consumption of a prepreg tape to the extent possible in obtaining the prepreg tape with a desired standard width. <P>SOLUTION: A cutting means 3 cuts the prepreg tape T in its longitudinal direction from one of ends serving as a reference end of the prepreg tape T having a first standard width toward the other end in a breadthwise direction at every position corresponding to a desired second standard width, whereby it cuts the prepreg tape T into two prepreg tapes T1 having the second standard width and a margin T2 sequentially from the reference end toward the other end in the breadthwise direction. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a method for cutting a prepreg tape used for manufacturing, for example, a fiber-reinforced composite material, and a slitter device for cutting the prepreg tape by the cutting method.

  Conventionally, a fiber-reinforced composite material in which a synthetic resin such as an epoxy resin (hereinafter also referred to as a matrix) is reinforced with high-strength fibers such as carbon fibers (hereinafter also referred to as reinforcing fibers) has been used in various applications. An example is an aircraft body.

  One method of manufacturing such a fiber-reinforced composite material is a method using a long sheet-like prepreg tape in which a reinforcing fiber having the same fiber direction is impregnated with a matrix in advance.

  Specifically, a method for producing a flat fiber-reinforced composite material using a prepreg tape is performed using, for example, a tape laminating apparatus (head) as disclosed in Patent Document 1 and the prepreg tape in the width direction. Are arranged side by side to form a layer, and the fiber direction is different (for example, the longitudinal direction (0 ° direction), the transverse direction orthogonal to the longitudinal direction (90 ° direction), and between the longitudinal direction and the transverse direction. A flat fiber-reinforced composite material can be produced by laminating the matrix after laminating (so as to be four directions in an oblique direction (± 45 ° direction)).

  By the way, when laminating a prepreg tape using the tape laminating apparatus described above, the tape laminating apparatus moves in the tape width direction in the same layer among the plurality of layers according to a preset program. The tapes are arranged side by side. At this time, it is necessary to arrange the tapes so that adjacent prepreg tapes do not overlap with each other and the intervals between the prepreg tapes are predetermined. Therefore, the width of the prepreg tape provided for such a tape laminating apparatus is set in advance as a standard width, and this standard width has a predetermined dimensional tolerance with respect to a predetermined reference width that is set. Set to the included width. Specifically, the width of the prepreg tape having the standard width is 2.97 ± 0, for example, the reference width is 2.97 inches (7.5438 cm) and the dimensional tolerance is ± 0.02 inches (0.0508 cm). .02 inch (nominal value 3 inch), 5.97 inch ± 0.02 inch (nominal value 6 inch) with a standard width of 5.97 inch (15.1638 cm) and a dimensional tolerance of ± 0.02 inch Set to Thus, since the width of the prepreg tape is set to a standard width including a predetermined dimensional tolerance, the tape laminating apparatus can set the movement amount in the tape width direction based on the standard width.

  For the prepreg tape having the predetermined standard width, a prepreg tape wider than the standard width is prepared, and the wide prepreg tape is cut into a predetermined width using, for example, a slitter device disclosed in Patent Document 2. Can be obtained by:

Japanese Patent Laid-Open No. 7-232375 JP 2006-218561 A

  However, the slitter apparatus as described above cuts out a prepreg tape having a predetermined standard width from the central portion in the width direction of a sufficiently wide prepreg tape, and both end portions remaining after the cut out are end materials even if they are relatively wide. Therefore, the prepreg tape is wasted.

  This invention is made | formed in view of this point, The place made into the objective is to reduce the wasteful consumption of a prepreg tape as much as possible in obtaining the prepreg tape which has a desired standard width | variety. is there.

The inventors of the present application set the above-mentioned standard width to an integer multiple such as a nominal value of 3 inches, 6 inches, and 12 inches. Therefore, the prepreg tape having a predetermined standard width is divided into two equal parts or 3 It was studied to obtain a plurality of prepreg tapes having a desired standard width by cutting into equal divisions such as equal division.
For example, when a prepreg tape having a nominal value of 3 inches is required, the prepreg tape having a nominal value of 6 inches is cut in the longitudinal direction at the center position in the width direction. By doing so, it is expected that two prepreg tapes having a nominal value of 3 inches are cut out from the prepreg tape having a nominal value of 6 inches.

  However, it has been found that such an equal division includes the following problems. That is, if the width of the prepreg tape having a nominal value of 6 inches is 5.98 inches, the prepreg tape having a nominal value of 6 inches is cut in the longitudinal direction at the center position in the width direction to be 2.99. Two prepreg tapes nominally 3 inches wide having an inch width are cut out. This is included in the dimensional tolerances allowed for prepreg tapes nominally 3 inches wide. However, when the width of the prepreg tape having a nominal value of 6 inches is 5.99 inches, the width is wider than the width of the prepreg tape having a nominal value of 3 inches (2.95 inches to 2.99 inches). Two prepreg tapes having a width of 995 inches will be cut out. Therefore, a prepreg tape having a desired standard width cannot be obtained simply by cutting the prepreg tape having a standard width so as to be equally divided.

  Therefore, the present invention provides a prepreg tape having a predetermined standard width at each position corresponding to a desired standard width from the reference end toward the other end side in the width direction with one end in the width direction as a reference end. A plurality of prepreg tapes having a desired standard width were cut out by cutting in the longitudinal direction.

  Specifically, in the first invention, the second standard width (nominal value) is obtained by cutting a plurality of portions in the width direction in the long prepreg tape having the first standard width (nominal value L1) in the long direction. L2 where L1 is a method for cutting a prepreg tape divided into N prepreg tapes having N times N2 (N is a natural number of 2 or more), and the prepreg tape of the first standard width Has a width including a dimensional tolerance defined in advance with respect to the first reference width set as the first standard width, and one end in the width direction of the prepreg tape of the first standard width is By cutting the prepreg tape of the first standard width in the longitudinal direction at each position corresponding to the second standard width from the reference end toward the other end side in the width direction as the reference end, Second standard width Cutting the N prepreg tapes, and removing the end material remaining on the other end in the width direction of the prepreg tape of the first standard width by cutting the N prepreg tapes, In the cutout step, the cutting position is set to a position corresponding to the actual width including the specified dimensional tolerance with respect to the second reference width set as the second standard width.

  According to the cutting method of the prepreg tape, the prepreg tape having the first standard width (nominal value L1) including the dimensional tolerance with respect to the first reference width includes the dimensional tolerance with respect to the second reference width. Since it has a width N times the standard width (nominal value L2), N prepreg tapes having the second standard width can be cut out from this prepreg tape. At the time of cutting, in this cutting method, one end in the width direction of the prepreg tape having the first standard width is set as the reference end, and in order from the reference end toward the other end side, a dimensional tolerance is included with respect to the second reference width. However, it is cut into N prepreg tapes having the second standard width and one end material. Thus, in order not to divide the prepreg tape of the first standard width evenly, but to cut out the prepreg tape of the second standard width (width including a dimensional tolerance with respect to the second reference width) in order from the reference end. When the prepreg tape of the first standard width is equally divided, the dimensional tolerance may exceed the allowable range, but this is not possible, and the prepreg tape of the second standard width can be reliably obtained.

  The first standard width (nominal value L1) is N times the second standard width (nominal value L2), and is substantially the same as dividing the prepreg tape of the first standard width into N pieces. The width of the remaining end material obtained by cutting out the N prepreg tapes having the second standard width from the prepreg tape having the first standard width becomes relatively narrow. Therefore, the amount of edge material is reduced as compared with a conventional case where a prepreg tape having a desired standard width is cut out from the central portion in the width direction of a sufficiently wide prepreg tape. Therefore, useless consumption of the prepreg tape can be reduced as much as possible.

  Also, unlike the conventional method of cutting a wide prepreg tape, the end material is not removed from both ends of the prepreg tape, and the end material is generated only at one end of the prepreg tape. The number is halved. As a result, it is possible to reduce the management equipment for the mill ends and reduce the labor for inspecting the mill ends.

  In the second invention, by cutting a plurality of portions in the width direction in the long prepreg tape having the first standard width (nominal value L1) in the long direction, the second standard width (nominal value L2, where L1 is A slitter device for a prepreg tape that is divided into N prepreg tapes having N times N2 (N is a natural number of 2 or more) is an object. And the unwinding means which unwinds the said prepreg tape of the 1st standard width from the tape roll wound in roll shape, and the end of the width direction in the prepreg tape unwound from the said unwinding means becomes a predetermined reference position As described above, the prepreg tape has positioning means for conveying the prepreg tape while adjusting the position in the width direction thereof, and N cutters disposed on the conveyance path of the prepreg tape, and each cutter is operated by the positioning means. Cutting means for cutting a predetermined position in the width direction in the prepreg tape whose position has been adjusted, respectively, and N pieces of prepreg tape each having the second standard width by being cut by the cutting means, Winding means for individually winding into a roll to form a tape roll, and a prep having the first standard width The tape has a width including a dimensional tolerance defined in advance with respect to the first reference width set as the first standard width, and among the N cutters of the cutting means, the prepreg The cutter arranged at a position closest to one end of the tape is defined with respect to the second reference width set as the second standard width on the other end side in the width direction with respect to the reference position. The N cutters are arranged at positions separated from each other by an actual width including a dimensional tolerance, and the N cutters are arranged at intervals corresponding to the actual width. The prepreg tape having the standard width is cut into N prepreg tapes having the second standard width and end materials in order from one end side to the other end side in the width direction.

  According to this slitter device, the prepreg tape (first standard width prepreg tape) unwound by the unwinding means is cut in the longitudinal direction at a predetermined position in the width direction by each of the N cutters on the transport path. The Thus, the prepreg tape having the first standard width is divided into N prepreg tapes and end materials. Here, the position of the prepreg tape of the first standard width unwound by the unwinding means is adjusted by the positioning means so that one end in the width direction becomes a predetermined reference position before being cut by the cutter. On the other hand, among the N cutters, a cutter disposed at a position closest to one end of the prepreg tape having the first standard width is located on the other end side in the width direction with respect to the reference position. The second reference width is set at a position separated from the second reference width by an actual width including a specified dimensional tolerance. Therefore, by cutting with the cutter, the prepreg tape having the second standard width is cut out from one end side of the prepreg tape having the first standard width. Further, since the N cutters are arranged with an interval corresponding to the actual width, the prepreg tape having the second standard width is cut out by each of a pair of adjacent cutters. As in the first aspect, the prepreg tape having the first standard width (nominal value L1) including the dimensional tolerance with respect to the first reference width is directed from one end to the other end in the width direction. In this order, since it is cut into N prepreg tapes having a second standard width (nominal value L2) including a dimensional tolerance with respect to the second reference width, and one end material, the same as in the first invention. In addition, wasteful consumption of the prepreg tape can be reduced as much as possible, the management equipment for the end material can be reduced, and the labor for inspecting the end material can be reduced.

  As described above, in the prepreg tape cutting method and slitting apparatus according to the present invention, a prepreg tape having a predetermined standard width is disposed from the reference end to the other end side in the width direction with one end in the width direction as a reference end. On the other hand, by cutting in the longitudinal direction for each position corresponding to the desired standard width, it is cut into a plurality of prepreg tapes having the desired standard width and one relatively narrow end material. In addition, useless consumption of the prepreg tape can be reduced as much as possible.

It is a schematic block diagram of the slitter apparatus which concerns on this invention. It is a figure explaining the positional relationship of a prepreg tape and a cutter. It is a figure explaining the cutting | disconnection aspect of a prepreg tape. It is a figure explaining the difference in the magnitude | size of the removal part in the case where a comparatively wide prepreg tape is used, and the case where a comparatively narrow prepreg tape is used.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiment is merely exemplary in nature.

  The slitter apparatus 1 which concerns on embodiment of this invention cut | disconnects the multiple places of the width direction in the elongate prepreg tape T which has 1st standard width (nominal value L1) to a 2nd standard width ( It is divided into N prepreg tapes T1 having a nominal value L2, where L1 is N times L2 (N is a natural number equal to or greater than 2), and unnecessary end material T2.

  In this embodiment, as an example, the first standard width is 5.97 inches (15.1638 cm) and the dimensional tolerance is ± 0.02 inches (0.0508 cm), which is commercially available as a prepreg tape of the first standard width. From the prepreg tape T having the first standard width of 5.97 ± 0.02 inch (nominal value 6 inches), the second reference width similar to the prepreg tape commercially available as the prepreg tape of the second standard width is obtained. Two prepreg tapes T1 having a second standard width of 2.97 ± 0.02 inches (nominal value 3 inches) with a dimensional tolerance of ± 0.02 inches and an end tolerance of 2.97 inches (7.5438 cm) It is comprised so that it may divide into material T2.

  The prepreg tape T is a long sheet-like tape material in which reinforcing fibers are impregnated with a matrix and the fiber directions are aligned in the same direction. In this embodiment, carbon fibers are used as reinforcing fibers, and epoxy resin is used as a matrix. Adopted. Although not shown, the prepreg tapes T and T1 are set in a tape laminating apparatus in a tape roll state wound in a roll shape, and are arranged side by side in the width direction by the tape laminating apparatus. For example, it is used for manufacturing a flat fiber-reinforced composite material by being laminated so that the fiber directions are different.

  As shown in FIG. 1, the slitter apparatus 1 includes an unwinding roll 2 as unwinding means for unwinding a prepreg tape T having a first standard width from a tape roll wound in a roll shape, and an unwinding roll 2. A cutting means 3 for cutting each predetermined position in the width direction in the prepreg tape T having the first standard width unwound in the longitudinal direction, and the prepreg tape T is cut by the cutting means 3 so that a desired second The two prepreg tapes T1 having the standard width are individually wound into a roll shape to form a tape roll, and two winding rolls 4 as winding means are provided.

  Thus, the slitter device 1 is provided with the cutting means 3 on the relatively upper side, while the unwinding roll 2 and the two take-up rolls 4 are relatively on the lower side. They are arranged side by side so that their hearts are at the same height.

  The unwinding roll 2 is configured to be rotatable around an axis extending in the horizontal direction, and the prepreg tape T wound in a roll shape is set as described above. Then, the prepreg tape T is unwound toward the cutting means 3 by the driven roll 2 being driven to rotate by the rotational drive of the drive roller 31 of the cutting means 3 described later.

  On the transport path of the prepreg tape T between the unwinding roll 2 and the cutting means 3, a guide roller 5 as a positioning means and a substantially flat plate having a flat surface in order from the upstream side to the downstream side of the transport path. And a slide 6 are arranged.

  The guide roller 5 includes a roller portion that is provided so as to be rotatable about an axis extending in the horizontal direction, and a flange portion that is joined to both ends of the roller portion.

  The guide roller 5 is a roller that conveys the prepreg tape T that has been unwound from the unwinding roll 2 while adjusting the position so as to be a predetermined position in the width direction by the flange portion. As shown in FIG. 2, the standard width prepreg tape T is positioned on the upstream side of the cutting means 3 in the conveying direction so that one end in the width direction becomes a predetermined reference position.

  The slide 6 is a member that prevents the prepreg tape T from being bent or vibrated between the slide 6 and the cutting means 3 by contacting the back surface of the prepreg tape T. If the prepreg tape T is not bent, the slide 6 may not be provided.

  The cutting means 3 includes a driving roller 31, a pressing roller 32, and a cutter 33. The driving roller 31 is relatively lower and the pressing roller is relatively upper with the prepreg tape T interposed therebetween. 32 and the cutter 33 are disposed respectively. Thus, the pressing roller 32 and the cutter 33 are disposed in order from the upstream side to the downstream side of the transport path of the prepreg tape T.

  The drive roller 31 is a roller configured to be rotatable about an axis extending in the horizontal direction, and is driven to rotate in a predetermined direction (clockwise direction in FIG. 1) by a motor (not shown).

  The pressing roller 32 is a roller that sandwiches the prepreg tape T with the driving roller 31 by being pressed against the driving roller 31.

  As described above, the roller pair including the driving roller 31 and the pressing roller 32 rotates the driving roller 31 so that the prepreg tape T is unwound from the unwinding roll 2 and the prepreg tape T is moved to the position of the cutter 33. Transport to.

  As shown in FIG. 2, the cutter 33 has, as a reference end, one end (the left end in FIG. 2) of the prepreg tape T whose position in the width direction has been adjusted by the guide roller 5 to be the reference position. One at a position separated from the reference end by the actual width (ie, 2.97 ± 0.02 inches) corresponding to the second standard width on the other end side in the width direction (ie, the right side of FIG. 2) Further, a total of two are arranged at a position separated by an actual width corresponding to the second standard width.

  Each cutter 33 has a circular blade that is rotatable in a disk shape, and a support portion that supports the circular blade. Although not shown, the support portion is configured to press the round blade of each cutter 33 against the prepreg tape T by air supplied from an air supply source. The cutting means 3 cuts the prepreg tape T having the first standard width in the longitudinal direction for each second standard width from the reference end toward the other end in the width direction by each cutter 33. As a result, as shown in FIG. 3, the prepreg tape T having the first standard width includes two prepreg tapes T1 having the second standard width in order from the reference end side in the width direction toward the other end side. It is cut into one end material T2. Thus, in the slitter device 1, the prepreg tape T having the first standard width is not divided into two, but one end in the width direction of the prepreg tape T having the first standard width is used as a reference end. From the end toward the other end in the width direction, the prepreg tape T having the first standard width is elongated at each position corresponding to the second standard width (that is, the actual width including the dimensional tolerance in the second reference width). By cutting in the direction, two prepreg tapes having the second standard width are cut out. For this reason, the dimensional tolerance of the cut out prepreg tape T1 cannot exceed the allowable range.

  Here, since the nominal value L1 (6 inches) of the prepreg tape T is twice the nominal value L2 (3 inches) of the prepreg tape T1, the width of the prepreg tape T and the total width of the two prepreg tapes T1 Are approximately equal. Accordingly, the width of the remaining end material T2 obtained by cutting the two prepreg tapes T1 from the prepreg tape T is relatively narrow. More specifically, the actual width corresponding to the first standard width is the nominal value L1-α, the actual width corresponding to the second standard width is the nominal value L2-α, and the number of cuts of the prepreg tape T1 having the second standard width is N. When the width of each piece and end material T2 is W, the following equation (1) is established.

(L1-α) = N (L2-α) + W (1)
Here, since L1 = N × L2, the expression (1) can be transformed into the following expression (2).

(L1-α) = L1-Nα + W (2)
Therefore, the width W of the end material T2 can be expressed by the following equation (3).

W = (N−1) α (3)
That is, the width of the end material T2 is the difference between the nominal value L1 of the prepreg tape T and the actual width corresponding to the first standard width (or the nominal value L2 of the prepreg tape T1 and the actual width corresponding to the second standard width). The width corresponding to a value obtained by multiplying α by a number obtained by subtracting 1 from the number N of cut out prepreg tapes T1. For example, if the width of the prepreg tape T having the first standard width is 5.97 inches and the width of the prepreg tape T1 having the second standard width is 2.97 inches, α is 0.03 and N is 2. The width W of the end material T2 is 0.03 inch (0.0762 cm).

  Further, when the difference between the nominal value L1 of the prepreg tape T and the actual width corresponding to the first standard width is different from the difference between the nominal value L2 of the prepreg tape T2 and the actual width corresponding to the second standard width. Even if it exists, since the difference of each nominal value and the actual width of each prepreg tape is generally not set large, the width of the end material T2 is generally the actual width corresponding to the nominal value L1 and the first standard width. (Or the difference between the nominal value L2 and the actual width corresponding to the second standard width) is multiplied by the number obtained by subtracting 1 from the number N of cut out prepreg tapes T1. Therefore, the width of the end material T2 is relatively narrow.

  The two prepreg tapes T1 cut out by cutting the prepreg tape T by the cutter 33 are conveyed by the drive roller 31 toward the take-up roll 4 corresponding to each prepreg tape T1. The guide rollers 5 are disposed on the transport path of each prepreg tape T1. Each prepreg tape T1 is conveyed toward each take-up roll 4 while its position in the width direction is adjusted by each guide roller 5 as described above.

  On the other hand, the end material T2 is sucked and removed by a hose not shown.

  Each winding roll 4 is a roller configured to be rotatable about an axis extending in the horizontal direction, and is driven to rotate in a predetermined direction (clockwise direction in FIG. 1) by a motor (not shown). Thereby, each winding roll 4 winds up corresponding prepreg tape T1 in a roll shape, and makes it a tape roll.

  In addition, the diameter of the unwinding roll 2 and each winding roll 4 changes with unwinding of the prepreg tape T, or winding of each prepreg tape T1. Thereby, the tension | tensile_strength of the prepreg tape T or each prepreg tape T1 changes, and there exists a possibility that the stable operation | movement of the slitter apparatus 1 may be prevented. Therefore, one ultrasonic sensor 7 for measuring the outer diameter of each roll is installed at the bottom of the slitter device 1 for each roll, and the torque of each roller is determined based on the measured value by the ultrasonic sensor 7. Is adjusted so that the tension of the prepreg tape T or the prepreg tape T1 is constant. By doing so, the prepreg tape T having the first standard width can be accurately cut, and the prepreg tape T1 having the second standard width can be stably wound into a roll with a predetermined winding tension. Become. This is particularly effective in that when the prepreg tape T1 having the second standard width after cutting is laminated by the tape laminating apparatus, the prepreg tape T1 can be stably unwound and laminated. is there.

  In this way, the prepreg tape T1 having the relatively narrow second standard width obtained by the slitter device 1 is made of a fiber-reinforced composite material than the prepreg tape T having the relatively wide first standard width. It may be advantageous when manufacturing. For example, as shown in FIG. 4, in the case of producing a tapered fiber-reinforced composite material, when the tape is applied so as to have an angle with respect to the oblique edge, the second, which is relatively narrow. When the prepreg tape T1 having the standard width is pasted, the unnecessary portion (the hatched portion of the prepreg tape T1 in FIG. 4) is pasted with the prepreg tape T having the relatively wide first standard width. Since it is less than unnecessary portions (shaded portions of the prepreg tape T in FIG. 4), useless consumption of the prepreg tape can be reduced.

  In addition, a conventional slitter apparatus that cuts out the central portion in the width direction of a wide prepreg tape to obtain a prepreg tape having a desired standard width leaves a relatively wide end material on the prepreg tape. When the slitter device 1 of the form is used, only a relatively narrow end material remains on the prepreg tape, so that wasteful consumption of the prepreg tape can be reduced.

  Further, unlike the conventional slitter apparatus, the slitter apparatus 1 of this embodiment does not remove the end material from both ends of the prepreg tape, but removes the end material only from one end of the prepreg tape. Therefore, the number of scraps to be removed is halved. As a result, it is possible to reduce the management equipment for the mill ends and reduce the labor for inspecting the mill ends.

  The number N of the prepreg tape T1 having the second standard width cut out from the prepreg tape T having the first standard width may be appropriately changed. In this case, the number of the cutters 33 of the cutting means 3 and the installation position thereof may be changed. And the number of winding rolls 4 may be appropriately changed.

  In this embodiment, the guide roller 5 is used as the positioning means. However, the position of the prepreg tape T or the prepreg tape T1 in the width direction, for example, the edge serving as the reference end of the prepreg tape T is detected by the sensor. The position in the width direction of each prepreg tape may be adjusted by inclining the rotation axis of the unwinding roll 2 or the winding roll 4 so that the end edge is positioned in a predetermined width direction. By carrying out like this, when each prepreg tape contacts the flange part of the guide roller 5, it can prevent that the edge part will be damaged.

  The present invention, for example, when cutting a prepreg tape for manufacturing a composite material used for a low inertia structure such as a structure of various transportation equipment such as an aircraft, a ship, and a vehicle and a wind power generation blade to a desired standard width Furthermore, it is useful in that wasteful consumption of the prepreg tape can be reduced as much as possible.

1 Slitter device 2 Unwinding roll (unwinding means)
3 Cutting means 31 Drive roller 32 Pressing roller 33 Cutter 4 Winding roll (winding means)
5 Guide roller (positioning means)
L1 Nominal value of first standard width L2 Nominal value of second standard width N Number of cut out prepreg tapes having second standard width T Prepreg tape having first standard width T1 Prepreg tape having second standard width T2 End material

Claims (2)

By cutting a plurality of portions in the width direction of the long prepreg tape having the first standard width (nominal value L1) in the long direction, the second standard width (nominal value L2, where L1 is N times L2 (N Is a cutting method of a prepreg tape that is divided into N prepreg tapes having a natural number of 2 or more,
The prepreg tape having the first standard width has a width including a dimensional tolerance defined in advance with respect to the first reference width set as the first standard width.
One end in the width direction of the prepreg tape of the first standard width is used as a reference end, and from the reference end toward the other end side in the width direction, for each position corresponding to the second standard width, Cutting N prepreg tapes of the second standard width by cutting a prepreg tape in the longitudinal direction;
Removing the remaining end material on the other end side in the width direction of the prepreg tape of the first standard width by cutting out the N prepreg tapes, and
In the cutting step, the prepreg tape in which the cutting position is set at a position corresponding to the actual width including the specified dimensional tolerance with respect to the second reference width set as the second standard width. Cutting method. By cutting a plurality of portions in the width direction of the long prepreg tape having the first standard width (nominal value L1) in the long direction, the second standard width (nominal value L2, where L1 is N times L2 (N Is a slitter device for a prepreg tape that is divided into N prepreg tapes having a natural number of 2).
Unwinding means for unwinding the prepreg tape of the first standard width from a tape roll wound in a roll;
Positioning means for conveying the prepreg tape while adjusting the position in the width direction so that one end in the width direction of the prepreg tape unwound from the unwinding means is a predetermined reference position;
Cutting means having N number of cutters disposed on the transport path of the prepreg tape and cutting predetermined positions in the width direction of the prepreg tape adjusted by the positioning means by the cutters in the longitudinal direction. When,
Winding means for winding N prepreg tapes each having the second standard width into a tape roll by being cut by the cutting means,
The prepreg tape having the first standard width has a width including a dimensional tolerance defined in advance with respect to the first reference width set as the first standard width.
Of the N cutters of the cutting means, a cutter disposed at a position closest to one end of the prepreg tape is set as the second standard width on the other end side in the width direction with respect to the reference position. The N cutters are arranged at positions separated from the second reference width by an actual width including the specified dimensional tolerance, and the N cutters are spaced from each other by a distance corresponding to the actual width. Has been placed,
The cutting means cuts the prepreg tape of the first standard width into N prepreg tapes of the second standard width and end materials in order from one end side to the other end side in the width direction. Characteristic slitter device.

Images