JP4770456B2 - Sheet cutting method - Google Patents

Description

  The present invention relates to a sheet cutting method, and more particularly to a sheet cutting method for cutting a ceramic green sheet used for a multilayer chip capacitor or a multilayer chip inductor into a large number of small rectangular chips. is there.

  In the manufacture of electronic components such as capacitors using ceramic green sheets or the like, a large rectangular sheet is cut into a large number of small rectangular chips for use. As a method for cutting such a sheet, a cutting mechanism that moves the cutting blade up and down by a servo motor is used to move the cutting blade up and down using a sheet cutting device provided above the sheet placing table for installing the sheet. After each vertical movement, the horizontal movement of the workpiece mounting table is executed, and after cutting the sheet in a fixed direction a predetermined number of times, the workpiece mounting table is rotated 90 degrees, and the vertical movement of the cutting blade and the workpiece are performed again. It is known that a large rectangular sheet is cut into a large number of small rectangular chips by repeating horizontal movement of the mounting table (Patent Document 1).

JP 2001-113520 A

  However, as described above, when a large sheet is sequentially cut at a predetermined position and separated into a product part (necessary part) and an unnecessary part on the outer periphery of the product, the cutting blade has a thickness, so that it has already been cut. It was clarified that the next cutting was performed so as to push and narrow the cutting groove (slit), and the cut surfaces were brought into close contact with each other. In such a state, if the necessary part is lifted and taken out from the processing table of the sheet mounting table by using the suction means or the like, the adhesion force between the cut surfaces becomes resistance to the force to lift the necessary part. The situation where it becomes difficult to lift the necessary part occurs. As a result, there is a problem that, when the cut sheet piece is lifted and taken out by the suction means or the like, if the suction force is weak, a take-out error tends to occur, and if the suction force is increased, the sheet piece is deformed.

  The object of the present invention is to eliminate the above-mentioned problems of the conventional sheet cutting method, and to easily separate the necessary and unnecessary parts of the cut sheet, making it impossible to use the suction means and the like. An object of the present invention is to provide a sheet cutting method that can be lifted and removed without any problem.

  Among the present inventions, the configuration of the invention described in claim 1 is that the sheet is sequentially cut in parallel at a predetermined position toward the other side facing from one side to the other side facing the other side. In this sheet cutting method, in which a plurality of sheet pieces are cut sequentially in parallel at a predetermined position and cut into a plurality of sheet pieces, a book that sequentially cuts sheets in parallel at a predetermined position from one side toward the other side When cutting, discard cutting is performed on one side of the main cutting, and when the sheet piece separated by the main cutting is lifted, the unnecessary sheet piece between the discard cutting and the main cutting is deformed upward to lift the sheet piece. It is to make it easier. The sheet cut by the sheet cutting method of the present invention is a thin sheet such as a ceramic green sheet.

  The structure of the invention described in claim 2 is the book according to the invention described in claim 1, when performing the main cutting in which the sheet is sequentially cut in parallel at a predetermined position from one side to the other side facing each other. This is because the cutting is discarded on one side and the other side from the cutting.

  According to a third aspect of the present invention, in the invention of the first aspect, the main cutting for sequentially cutting the sheet in parallel at a predetermined position toward the other side facing the one side from the one side faces the other side. After the main cutting that sequentially cuts in parallel at a predetermined position toward the other side, abandoned cutting is performed on one side of the main cutting.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the main cutting for sequentially cutting the sheet in parallel at a predetermined position from one side toward the other side facing the one side faces from the other side. After the main cutting that sequentially cuts in parallel at a predetermined position toward the other side, abandoned cutting is performed on one side and the other side from the main cutting.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the discard cutting is an incomplete cutting that leaves a part of the thickness of the sheet.

  The structure of the invention described in claim 6 is that, in the invention described in any one of claims 1 to 4, the interval between the discard cutting and the main cutting is smaller than the interval between the main cutting.

  In the sheet cutting method according to claim 1, when performing the main cutting in which the sheet is sequentially cut in parallel at a predetermined position from one side toward the other side, the main cutting is performed by discarding cutting on one side. When lifting the sheet piece separated by the cutting, the unnecessary sheet piece between the discard cutting and the main cutting is deformed upward to make it easier to lift the sheet piece. It becomes easy to separate, the sheet piece can be reliably taken out with a small force, and the workability of the sheet piece taking-out operation can be improved while maintaining the quality of the sheet piece.

  In the sheet cutting method according to claim 2, when performing the main cutting that sequentially cuts the sheet in parallel at a predetermined position from the one side toward the other side facing each other, the sheet is discarded on one side and the other side from the main cutting. Since the cutting is performed, when the sheet piece is lifted, the unnecessary sheet piece of the cutting and the main cutting is deformed upward on both sides of the main cutting region, and the sheet piece is easily lifted, and the sheet piece is reliably secured with a small force. The sheet can be taken out and the workability of taking out the sheet piece can be improved.

  The sheet cutting method according to claim 3, wherein the sheet is sequentially cut in parallel at a predetermined position from one side toward the other side facing the other side, and is sequentially parallel at a predetermined position toward the other side facing the other side from the other side. After each of the main cuts to be cut, discard cutting is performed on one side by the main cutting, so even if the sheet pieces are strongly pressed against the sheet edge on each one side by the main cutting, they are discarded. Unnecessary sheet pieces between the cutting and the main cutting are deformed upward to make it easy to lift the sheet pieces, and all the sheet pieces can be reliably taken out with a small force.

  The sheet cutting method according to claim 4 is a predetermined position after the main cutting that sequentially cuts the sheet in parallel at a predetermined position from the one side toward the other side facing the one side and the other side facing the other side from the other side. In each of the main cuts that are cut in parallel with each other, in each of the main cuts, discard cutting is performed on one side and the other side, so that all sheets separated by the main cut are cut off. Unnecessary portions of the sheet piece and the sheet edge are easily separated on the entire circumference of the piece, and all the sheet pieces can be reliably taken out with a small force, so that the workability of the sheet piece taking-out operation can be improved.

  In the sheet cutting method according to the fifth aspect, since the discard cutting is incomplete cutting that leaves a part of the thickness of the sheet, an unnecessary sheet piece between the discard cutting and the main cutting can be connected to the sheet edge. It is possible to prevent these unnecessary sheet pieces from becoming sheet waste pieces and being scattered around and causing various troubles.

  In the sheet cutting method according to the sixth aspect, since the interval between the discard cutting and the main cutting is smaller than the interval between the main cutting, the sheet cutting method can be performed even when the width of the unnecessary sheet edge is small, and the sheet is discarded without enlarging the sheet. It can be cut and is practical.

  Hereinafter, an embodiment of a sheet cutting method according to the present invention will be described in detail with reference to the drawings. 1 and 2 are a front view and a right side view, respectively, of a sheet cutting apparatus used in the sheet cutting method according to the present invention. The sheet cutting apparatus 1 is a sheet provided with a sheet cutting mechanism for cutting a sheet. A cutting station S1 and a sheet piece discharging station S2 provided with a sheet discharging device for taking out the cut ceramic green sheet are provided.

  The sheet cutting station S1 includes a sheet mounting table 11 for mounting a sheet to be cut (ceramic green sheet) and a sheet cutting machine 21 for cutting the sheet mounted on the sheet mounting table 11. A cutting mechanism is provided. The sheet mounting table 11 is a table in which a rotary table 13 is installed above the moving table 12, and is installed on guide rails 14 and 14 disposed in parallel to the base 2. The ball screw is rotated by a linear drive device (not shown) so as to reciprocate between the sheet cutting station S1 and the sheet piece discharging station S2 along the guide rails 14 and 14. Further, the rotary table 13 is rotated at an angle of 90 degrees or more about the vertical axis by a rotation driving device (not shown). In addition, as a rotation drive device, the part of the code | symbol 12 of FIG. 1 may be comprised as a main body of a rotation drive motor, and you may make it install the rotation table 13 in the upper part of a rotation drive device.

  On the other hand, the sheet cutting machine 21 is supported by a column (not shown) erected on the base 2. The cutting blade 23 mounted in the cutter holder 22 with its cutting edge facing downward can be moved up and down in the vertical direction by a rotation operation by a motor of a ball screw (not shown).

  As shown in FIG. 2, in the sheet piece discharge station S <b> 2, a pair of support frames 32 and 32 are erected so as to straddle the guide rails 14 and 14. 33 is suspended. In addition, on the gantry 33, one rodless cylinder 34, which is a linear actuator, and one guide rail 38 are installed horizontally, and a pair of sliders 38a guided by the guide rail 38 are attached to the base 33. The vertical portion 39 of the moving body 37 is fixed. A movable element 35 of the rodless cylinder 34 that can move horizontally is integrally connected to the vertical portion 39 of the movable body 37 by an attachment screw. Note that a rodless cylinder with guide may be installed instead of the rodless cylinder 34 and the guide rail 38, and the moving body may be attached to the slider of the rodless cylinder with guide that is linearly moved.

  The movable body 37 is connected to the lower end of the flat plate-like vertical portion 39 so that the flat plate-like horizontal portion 40 protrudes outward. A triangular reinforcing plate 41 is vertically welded to the vertical portion 39 and the horizontal portion 40. The horizontal portion 40 is provided with a cylinder 42 and two bushes 43a and 43b in a row, and a piston rod 44 of the cylinder 42 and two guide bars 45 and 45 penetrating the bushes 43a and 43b. In this state, it protrudes downward from the lower surface of the horizontal portion 40. And the raising / lowering body 36 is attached to the piston rod 44 of those cylinders 42, and the lower end of the guide bars 45,45.

  The elevating body 36 includes a rectangular support plate 47 in which adsorption means (adsorption bodies) 46, 46... Are arranged in a 4 × 4 lattice pattern, and a rectangular fixing plate 48 positioned above the support plate 47. Are installed in parallel in the vertical direction via four support pins 47a. The piston rod 44 of the cylinder 42 protruding from the lower surface of the horizontal portion 40 and the guide bar 45, 45 is fixed. In addition, a sheet discharge table 49 for placing the cut sheet is installed at a position outside the sheet cutting station S1 of the one support frame 32.

  Hereinafter, an example of a sheet cutting method using the sheet cutting apparatus 1 configured as described above will be described. The sheet S to be cut is cut into a rectangle having a predetermined size, and a material film (for example, an internal electrode) constituting an electrical element with a predetermined pattern is formed in advance by printing or the like. In addition, alignment marks (not shown) for positioning are printed at the four corners of the sheet S. And this sheet | seat S is mounted on the metal frame 3 formed in the rectangular shape, and the four corners are fixed by fixing means 5, 5. It is conveyed onto the rotary table 13 of the sheet placing table 11 (see FIG. 1). Note that the sheet S may be fixed to the metal frame 3 not only at the four corners of the sheet S but also by affixing the entire four sides of the sheet S with an adhesive tape. In FIG. 1, the thin rubber sheet 13 a for preventing the cutting blade 23 from coming into contact with the rotary table 13 is pasted. However, the pasting of such a thin rubber sheet may be omitted. The metal frame 3 is preliminarily provided with positioning holes 4 and 4, and a positioning pin (not shown) projecting on the rotary table 13 is fitted into the positioning holes 4 and 4, The metal frame 3 is installed at a predetermined position by pressing it in one direction. Thereafter, using the CCD camera (not shown) provided in the sheet cutting machine 21, the rotary table 13 appropriately moves and rotates in the Y direction with reference to the alignment mark attached to the sheet S. Thus, the sheet S is accurately positioned.

  After the sheet S is positioned in such a manner, the cutter holder 22 is moved back and forth by a driving device (not shown) of the sheet cutting machine 21 so that the cutting blade 23 cuts the sheet S at a high speed. FIG. 3 shows a procedure for cutting a sheet when 4 × 4 = 16 rectangular chips T are cut out from one rectangular sheet. In the cutting of the sheet S, each time the cutter holder 22 moves up and down once, the operation of moving the sheet placing table 11 by a predetermined pitch in a predetermined direction by the linear drive device is repeated (repeated 8 times), thereby FIG. As shown in (a), first, a plurality of slits a to h along the X-axis direction are sequentially formed on the sheet S (main cutting). FIG. 4 shows a cross section of the sheet S in which the slits a to h are formed. When the slits a to h are formed as shown in FIG. 4, the sheet piece (chip T) between the slits a and b is pushed toward the slit a by the thickness of the cutting blade 23, and both side surfaces of the slit a are pressure-bonded. Similarly, both side surfaces of the slits b to g are brought into a pressure-bonded state. In FIGS. 4 and 6, the slit width is shown large for the sake of explanation, but it is actually small enough to make contact. Moreover, between slits a and b, between slits c and d, between slits e and f, and between slits g and h are parts cut out as a rectangular chip T, between slits b and c, between slits d and e, The space between the slits f and g is an unnecessary portion that does not constitute a rectangular chip.

  As described above, after the plurality of slits a to h are formed along the X-axis direction, the rotary table 13 of the sheet mounting table 11 is rotated forward by 90 degrees by a rotation driving device (not shown). Then, similar to the formation of the slits a to h described above, each time the cutter holder 22 moves up and down once, the operation of moving the sheet placing table 11 by a predetermined pitch in a certain direction is repeated (repeated eight times). 3B, a plurality of slits (A) to (H) along the Y-axis direction are formed in the sheet S (main cutting). When the slits (A) to (H) are formed, both the side surfaces of the slits (A) to (G) are pressed by the thickness of the cutting blade 23 in the same manner as the slits a to g. By forming the slits (A) to (H) along the Y-axis direction, the sheet S is cut into a large number of small rectangular chips (also referred to as sheet pieces) T, T. Between the slits (A) and (B), between the slits (C) and (D), between the slits (E) and (F), and between the slits (G) and (H), rectangular chips T, T ·・ A part that is cut out as follows, and between the slits (b) and (c), between the slits (d) and (e), and between the slits (f) and (g), does not constitute a rectangular chip T, T. It is an unnecessary part.

  After the sheet S is cut into a large number of small rectangular chips T, T..., The sheet holder 11 is already formed by moving up and down while the sheet mounting table 11 is moved to a predetermined position. Slits (Li) and (N) are respectively formed on the outer side of the slit (I) and the outer side of the slit (H) (discard cutting). Note that the slits (Li) and (N) may cut the sheet S completely, but if it is formed so as to leave a part of the thickness of the sheet S without cutting completely, the unnecessary sheet by discard cutting is used. It is preferable that the pieces can be prevented from scattering. FIG. 6 shows a cross section of the sheet S after the slits (A) to (N) are formed.

  Thereafter, the rotary table 13 of the sheet mounting table 11 is rotated reversely by 90 degrees by a rotation driving device (not shown). Then, similarly to the formation of the slits (R) and (N), the cutter holder 22 moves up and down while the sheet mounting table 11 is moved to a predetermined position, so that the outside of the slit a that has already been formed. And slits i and j are formed on the outside of the slit h, respectively (discard cutting, see FIG. 5). The slits i and j may be formed following the formation of the slits a to h prior to the formation of the slits (a) to (h). Further, the slits i and j may completely cut the sheet S similarly to the slits (Li) and (N), but preferably a part of the thickness of the sheet S is left without being completely cut. Formed as follows. The cutting operation of the sheet S is completed by forming the slits (Li) and (N).

  After the sheet S is cut into a large number of small rectangular chips T, T,..., The sheet mounting table 11 is conveyed to the sheet piece discharge station S2 by the table moving mechanism. When the sheet mounting table 11 is conveyed to the sheet piece discharge station S2, the lift 36 that has been waiting on one side (left side in FIG. 3) is lowered by the pneumatic operation of the cylinder 42. Then, when the lower ends of the suction means 46, 46,... Come into contact with the small rectangular chips, the suction means 46, 46,... Hold the chips T, T,. When each suction means 46, 46,... Grips each chip T, T,..., The elevating body 36 starts to rise, and at the same time, the moving body 37 is moved to the opposite side (right side in FIG. 3) by the pneumatic drive of the rodless cylinder 34. Move to). At the same time as the movement is completed, the elevating body 36 starts to descend, and descends when the chips T, T,... Gripped by the suction means 46, 46,. At this position, the suction means 46, 46,... Stop the suction, thereby releasing the gripping of the chips T, T,. The operation of discharging the cut sheet S is completed by releasing the gripping of the chips T, T,.

  The above-described sheet cutting method using the sheet cutting apparatus 1 performs the main cutting in which the sheet S is sequentially cut in parallel at a predetermined position from the one side toward the other side facing each other, and then discarded on one side from the main cutting. When cutting and lifting the sheet pieces T, T,... Separated by the main cutting, unnecessary sheet pieces (W, W,. Since the sheet pieces T, T,... Are easily lifted (inclined), the sheet pieces T, T,. Can be reliably taken out with a small force, and the workability of the sheet piece taking-out operation can be improved. Further, since the suction force can be weakened by the suction means 46, the problem that the suction force is deformed with respect to the sheet piece T can be solved, and the quality of the sheet piece T can be maintained.

  Further, in the sheet cutting method described above, after performing the main cutting in which the sheet S is sequentially cut in parallel at a predetermined position from the one side toward the other side facing each other, the one side and the other side from the main cutting are respectively performed. Since the discard cutting is performed, when the sheet pieces T, T,... Are lifted, the unnecessary cutting pieces (W, W,... In FIG. 5) are deformed upward on both sides of the main cutting area. Thus, the sheet pieces T, T,... Can be easily lifted, and the sheet pieces T, T,. The discard cutting on the one side and the discard cutting on the one side and the other side may be performed before or during the main cutting when performing the main cutting.

  Further, in the above-described sheet cutting method, the main cutting for sequentially cutting the sheet S in parallel at a predetermined position from one side toward the other side facing the one side and the parallel at the predetermined position sequentially from the other side toward the other side facing the other side. After each of the main cuttings to be cut, the sheet cuttings are performed on one side by the main cutting, so that the sheet pieces T, T... Are strongly pressed against the sheet edge on each side by the main cutting. Even when the sheet is cut, unnecessary sheet pieces (W, W... In FIG. 5) between the discard cutting and the main cutting are deformed upward to easily lift the sheet pieces T, T .. T ·· can be reliably removed with a small force.

  In addition, in the sheet cutting method described above, the main sheet S is sequentially cut in parallel at a predetermined position toward the other side facing the sheet S from the one side, and toward the other side facing the other side. Since the main cutting that sequentially cuts in parallel at a predetermined position is performed, the cutting is performed on the one side and the other side from the main cutting. The sheet pieces T, T,... And the unnecessary portions (W, W,... In FIG. 5) are easily separated on the entire circumference of the sheet pieces T, T,. .. can be reliably taken out with a small force, and the workability of taking out the sheet piece can be improved.

  Further, in the above-described sheet cutting method, the discarding cutting is incomplete cutting that leaves a part of the thickness of the sheet S. Therefore, unnecessary sheet pieces (W, W... In FIG. 5) between the discarding cutting and the main cutting are removed. It is possible to prevent the unnecessary sheet pieces (W, W,...) From being formed as sheet waste pieces and scattered around the sheet, thereby causing various troubles.

  Furthermore, since the above-described sheet cutting method makes the interval between the discard cutting and the main cutting smaller than the main cutting interval, it can be performed even when the width of the unnecessary sheet edge is small, and without increasing the sheet S. It can be cut off and is practical.

  The configuration of the sheet cutting method of the present invention is not limited to the aspect of the embodiment described above, and the shape and structure of the sheet cutting device and the like used for cutting, the method and sequence of discarded cutting, the method of main cutting, The order and the like can be appropriately changed as necessary without departing from the spirit of the present invention. For example, the number of discarded cuts is not limited to one each, but may be increased as necessary to be two or more. Further, in this cutting, only the outermost cutting may be completely cut and the other intermediate cutting may be cut incompletely. In this case, unnecessary portions between the slits can be prevented from scattering. .

  For example, the slits formed on the outermost side of the sheet (the slits by discarding cutting, the slits i and j and the slits (re) and (n) in the above embodiment) are incomplete cutting that leaves a part of the thickness of the sheet. The sheet is not limited, and the sheet may be completely cut. Moreover, it is not necessary to form slits other than the slits formed on the outermost side of the sheet in order from one side of the sheet, and the order can be appropriately changed as necessary. The cutting of the sheet by the sheet cutting method of the present invention is not limited to the cutting of a single layer sheet, and may be a cutting of a laminated sheet in which a plurality of sheets are laminated.

It is a front view of a sheet cutting device. It is a right view of a sheet cutting device. It is explanatory drawing which shows a mode that a sheet | seat is cut | disconnected ((a) shows the state in which the slit along X-axis direction was formed, (a) is the slit along X-axis direction and Y-axis direction. Is a state in which is formed). It is explanatory drawing which shows the cross section (AA cross section in Fig.3 (a)) of the sheet | seat after the slit along an X-axis direction was formed. It is explanatory drawing which shows the state by which the sheet | seat was cut | disconnected. It is explanatory drawing which shows the cross section (BB cross section in FIG. 5) of the sheet | seat after a cutting | disconnection.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Sheet cutting device, 11 ... Sheet mounting table, 21 ... Sheet cutting machine, 23 ... Cutting blade, 46 ... Suction means, S ... Sheet, aj ... Slit, (I)-( N) .. Slit, T..Rectangular tip (required part), W..Remaining sheet (unnecessary part)

Claims (6)

A book that cuts a plurality of sheet pieces by cutting a sheet sequentially in parallel at a predetermined position from one side to the other side facing the other side, and then sequentially cutting in parallel at a predetermined position from the other side to the other side facing the other side. In the sheet cutting method in which cutting is performed,
When performing a main cutting that sequentially cuts the sheet in parallel at a predetermined position from one side to the other side facing the other side, when discarding cutting on one side from the main cutting and lifting the sheet piece separated by the main cutting A sheet cutting method in which an unnecessary sheet piece between abandoned cutting and main cutting is deformed upward to make it easy to lift the sheet piece.   2. When performing the main cutting in which the sheet is sequentially cut in parallel at a predetermined position from one side to the other side facing each other, the cutting is discarded on the one side and the other side from the main cutting. The sheet cutting method described in 1.   After each of the main cutting that sequentially cuts the sheet in parallel at a predetermined position from one side toward the other side facing the other side and the main cutting that sequentially cuts in parallel at a predetermined position from the other side toward the other side facing the other side The sheet cutting method according to claim 1, wherein discard cutting is performed on one side of the main cutting.   After each of the main cutting that sequentially cuts the sheet in parallel at a predetermined position from one side toward the other side facing the other side and the main cutting that sequentially cuts in parallel at a predetermined position from the other side toward the other side facing the other side The sheet cutting method according to claim 3, wherein the cutting is performed on one side and the other side of the main cutting.   The sheet cutting method according to claim 1, wherein the discard cutting is incomplete cutting that leaves a part of the thickness of the sheet. The sheet cutting method according to claim 1, wherein an interval between the discard cutting and the main cutting is smaller than an interval between the main cutting.

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