JP2005353946A - Method and device for separating chip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device for separating chips, which prevent breaking or chipping of chips which is caused when the chip on a unseparated side runs on a mother block. <P>SOLUTION: A run-on preventing means which prevents a chip 4a on a unseparated side 7 from running on a mother block 4 is provided from the pressurizing point 3a of a pressuring roller 3 to the unseparated side 7 of the mother block 4. The run-on preventing means is configured by stretching an elastic material sheet 6 at a specified tension, with a clearance (t) which is less than the thickness of mother block being provided, on the mother block 4 on the unseparated side 7. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  In the present invention, when the mother block is cut along a cutting line set so that a large number of chips can be obtained, the mother block is separated into chips by pressing the mother block with a pressing roller through an elastic sheet. The present invention relates to a chip separation method and a chip separation apparatus.

  For example, when manufacturing a multilayer ceramic chip component, an internal electrode is printed in each region defined by the cutting line of the ceramic green sheet, and the green sheet and the internal electrode are alternately positioned. It is a general method to laminate and form a laminated mother block and cut the laminated mother block along the cutting line.

  By the way, when the laminated mother block is continuously cut, the cut surfaces may be rejoined with a weak joining force by the binder contained in the ceramic green sheet. For this reason, the chip components rejoined after the cutting step of the laminated mother block are separated.

As a method of separating such rejoined chip parts, the mother block is conveyed with an endless belt and pressed with a pressure roller to be separated into individual chip parts, or the mother block is conveyed with a belt conveyor. In some cases, the mother block is heated to a predetermined temperature, and the mother block is pressed by a pressing roller with an elastic sheet interposed therebetween to be separated into individual chip parts (for example, see Patent Documents 1 and 2).
Japanese Utility Model Publication No. 3-8 JP 2000-223360 A

  However, in the method of separating the conventional mother block by directly pressing it with a pressure roller, there is a problem in that deposits attached to the pressure roller and irregularities on the roller surface are transferred to the mother block, resulting in poor appearance.

  Further, the method of pressing the mother block with an elastic sheet with a pressing roller does not cause a problem of appearance failure, but the chip on the unseparated side of the mother block may be pushed up and ride on the mother block. is there. As a result, there is a problem that the chip that has been picked up is pressed by the pressing roller and is cracked or chipped.

  That is, as shown in FIG. 8, when the mother block 31 is pressed by the pressing roller 30 via the elastic sheet 37, the chips 34 and 35 rejoined at the cutting line 32 are pressed to the left and right. They will be separated (see FIG. 8A). In this case, since the separated chips 34 pressed by the pressing roller 30 are spaced apart from each other, there is a sufficient space even if the chips 34 are pressed and moved (see FIG. 8B). ).

  On the other hand, since the chips 35 on the unseparated side are rejoined to each other, there is no escape from the pressing force. The tip 34 just below the pressing roller 30 pushes the tip 34 on the left side to the separation side by the pressing force. However, the unseparated side without the pressing roller 30 has only the elastic sheet 37 and the elastic sheet 37 bends upward, so that the chip 35 is pushed upward by the accumulated pressing force, and in some cases, the rear mother It will ride on the block 36 (see FIG. 8C).

  The present invention has been made in view of the above-described conventional situation, and provides a chip separation method and a chip separation device that can prevent chip breakage and chipping caused by an unseparated chip riding on a mother block. It is an object.

  According to the first aspect of the present invention, an elastic sheet is disposed on a mother block cut into a large number of chips along a cutting line, and a pressing roller is disposed on the elastic sheet, and the elastic sheet is formed by the pressing roller. Chip separation method for separating the mother block into chips along the cutting line by pressing the mother block through the guide and relatively moving the pressure roller and the mother block in one direction In this case, by providing a predetermined clearance on the mother block in a certain range from the pressing point of the pressing roller to the unseparated side in the relative movement direction, the chip on the unseparated side is prevented from riding on the mother block. It is characterized by having taken-up prevention means.

  According to a second aspect of the present invention, in the first aspect, the climbing prevention means is applied over an area of at least 15% of the length in the relative movement direction of the mother block from the pressing point of the pressing roller. It is a feature.

  According to a third aspect of the present invention, in the first or second aspect, the climbing prevention means can provide a clearance less than the thickness of the mother block between the elastic sheet and the unseparated mother block. It is characterized by being constructed by pulling in a predetermined direction with a predetermined tension.

  According to a fourth aspect of the present invention, in the first or second aspect, the climbing prevention means has a relative positional relationship fixed to the pressing roller, and a thickness of the mother block between the unseparated elastic sheet. It is characterized by comprising a stopper member arranged with a clearance less than this.

  A fifth aspect of the present invention is characterized in that, in any one of the first to fourth aspects, the mother block is arranged so that the cutting line obliquely intersects the axis of the pressing roller.

  According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the pressing surface of the pressing roller with respect to the mother block is a surface opposite to the cutting blade entry surface when the mother block is cut. Yes.

  According to a seventh aspect of the present invention, an elastic sheet is disposed on a mother block cut into a large number of chips along a cutting line, and a pressing roller is disposed on the elastic sheet, and the elastic sheet is formed by the pressing roller. In the chip separating apparatus, wherein the mother block is separated into the chips along the cutting line by pressing the mother block through the guide and moving the pressing roller and the mother block relatively in one direction. Riding that prevents the unseparated chip from riding on the mother block by providing a predetermined clearance on the mother block in a certain range from the pressing point of the pressing roller to the unseparated side in the relative movement direction. It is characterized by providing prevention means.

  According to the chip separation method and the chip separation apparatus according to the first and seventh aspects of the present invention, since the climbing prevention means for preventing the chip from being pushed up from the pressing point to the unseparated side of the mother block is provided, It is possible to prevent the chip from being pushed up and riding on the mother block. As a result, the chip can be prevented from being cracked or chipped, and the product yield can be improved.

  In addition, since the mother block is pressed through the elastic sheet, it is possible to prevent the appearance of the chip from being deteriorated due to deposits attached to the pressing roller and unevenness on the roller surface.

  In the invention of claim 2, since the climbing prevention means is provided over an area of 15% or more of the length in the relative movement direction of the mother block from the pressing point of the pressing roller, the area where the chip pressing phenomenon is most likely to occur is provided. The cover can be covered, and it is possible to reliably prevent the ride on the mother block.

  In the invention of claim 3, the climbing prevention means is configured by pulling the elastic sheet with a predetermined tension in a state where a clearance less than the thickness of the mother block is provided between the elastic sheet and the unseparated mother block. As a result, the mother block on the unseparated side moves to the side opposite to the pressing roller, that is, the separated side, and it is possible to prevent the pushing force from acting on the chip on the non-separated side, thereby preventing the mother block from riding on .

  That is, by providing the clearance between the mother block and the elastic sheet, it is possible to eliminate the frictional force between them, and the unseparated chip is moved to the separated side by the pressing roller. It will be. Further, even if a pushing force is generated on the unseparated chip, the clearance with the elastic sheet is not more than the thickness of the chip, so that it does not ride on the mother block.

  Since a predetermined tension is applied to the elastic sheet, it is possible to suppress the generation of wrinkles on the elastic sheet, and the pressing force of the pressing roller can be uniformly transmitted to the mother block via the elastic sheet. The generation of unseparated chips due to can be prevented.

  In the invention of claim 4, since the riding-up preventing means is constituted by a stopper member arranged with a clearance less than the thickness of the mother block between the elastic sheet of the mother block on the non-separated side, Even if the non-separated chip is pushed up by the pressing force, it can be suppressed by the stopper member, and it is possible to prevent the chip from riding on the mother block.

  In the invention of claim 5, since the mother block is arranged so that the cutting line obliquely intersects the axis of the pressing roller, the pressing force acts equally along each cutting line of the mother block, As a result, each chip can be separated by a single separation step.

  In the invention of claim 6, since the pressing surface of the pressing roller with respect to the mother block is the surface opposite to the entry surface of the cutting blade of the mother block, the chips can be easily separated. That is, since the cutting blade has a V-shaped cross section, the entry surface side of the cutting blade of the mother block is easily separated. Therefore, by pressing the mother block from the side opposite to the cutting blade entry surface, the mother block can be warped so that the chips on the cutting blade entry surface side spread, and the chips can be easily separated.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 to 4 are views for explaining a chip separation method and a chip separation apparatus according to an embodiment (first embodiment) of the present invention, FIG. 1 is a plan view of the chip separation apparatus, and FIG. 2 is a chip. FIGS. 3A and 3B are views showing the pressing amount of the pressing roller, and FIGS. 4A and 4B are separation states of the chips of the mother block by the pressing roller. FIG.

  In the figure, reference numeral 1 denotes a chip separating apparatus which separates the mother block 4 into a large number of chips 4a along vertical and horizontal cutting lines A1 and A2, which is a transport jig 2 transported in the direction a. The lower elastic sheet 5 is disposed on the upper surface of the upper elastic sheet, the upper elastic sheet 6 is disposed on the lower elastic sheet 5, and the pressing roller 3 can be rotated and moved up and down on the upper elastic sheet 6. It has the general structure arranged in.

  The mother block 4 is formed by pattern-printing internal electrodes on a ceramic green sheet (not shown), laminating the ceramic green sheets so that the green sheets and the internal electrodes are alternately positioned, and pressing in the laminating direction. It is a thing. The mother block 4 is a square having a side length of 135 mm × 135 mm, and the block thickness is about 0.2 to 0.5 mm.

  The mother block 4 is cut by a cutting blade (not shown) along vertical and horizontal cutting lines A1 and A2 set so as to obtain a predetermined number and a predetermined size of chips 4a. The cut chips 4a are rejoined with a weak bonding force by a binder or the like included in the ceramic green sheet.

  As shown in FIG. 1, the mother block 4 is arranged such that the short side 4b of each chip 4a faces in a direction perpendicular to the transport direction a and the long side 4c faces in parallel with the transport direction a. As described above, when the vertical cutting line A1 of the two vertical and horizontal cutting lines A1 and A2 in the mother block 4 is substantially parallel to the transport direction a, the chip is cut along the vertical cutting line A1 in the first separation step. Since separation is not performed, it is necessary to perform the separation process again by changing the conveyance direction. That is, since there is a difference in bending moment due to the pressing roller, if the chip to be separated has a long side direction and a short side direction, the cutting line in the short side direction is difficult to separate. Further, at the time of the second separation step, the positions of the chips are not maintained at the original lattice positions, and therefore, the separation is more difficult than at the time of the first separation step. For this reason, in the first separation step that is relatively easy to separate, the cutting direction A2 is first separated by making the conveyance direction a and the transverse cutting line A2 in the short side direction of the chip orthogonal to each other. In the second separation step, which is difficult to perform, it is desirable to separate the cutting line A1 in the long side direction by orthogonally crossing the conveying direction a and the longitudinal cutting line A1 in the long side direction of the chip.

  The pressing roller 3 is set to have an outer diameter of about 5 mm with respect to the thickness of the mother block 4. As for the pressure roller 3, the smaller the outer diameter of the roller, the smaller the contact area with the upper elastic sheet 6, and the greater the pressing force applied to the mother block 4. For this reason, since the curvature of bending of the mother block 4 becomes large, separation becomes easy.

  As shown in FIG. 3, the pressing amount b of the pressing roller 3 into the upper elastic sheet 6 is set to about 0.2 mm, which is equal to or less than the thickness of the mother block 4. The pressing amount b of the pressing roller 3 is easily separated because the pressing force transmitted to the mother block 4 increases as the pressing amount b increases. However, if the push-in amount b is simply increased, the mother block 4 is strongly pressed against the lower elastic sheet 5 and there is a concern that damage to the chip 4a increases. For this reason, it is preferable that the pressing amount b of the pressing roller 3 is equal to or less than the thickness of the mother block 3.

  As shown in FIG. 4, in the mother block 4, the pressing surface 4 </ b> A against which the pressing roller 3 is pressed is a surface opposite to the cutting blade entry surface 4 </ b> B when the mother block 4 is cut. That is, the mother blade 4 is disposed such that the cutting blade entry surface 4B side faces the lower elastic sheet 5 and the pressing surface 4A side faces the upper elastic sheet 6.

  Since the cutting blade has a V-shaped cross section, the cutting blade entry surface 4B side of the mother block 4 has a smaller adhesion force due to rejoining than the pressing surface 4A side. Therefore, by pressing the surface opposite to the cutting blade entry surface 4B with the pressing roller 3, the curvature of each chip 4a is increased and it is easy to separate. For example, as shown in FIGS. 5A and 5B, when the cutting blade entry surface 4B side of the mother block 4 is pressed by the pressing roller 3, the adhesion force between the chips 4a on the opposite surface 4A side is increased. It becomes difficult to separate because it is large. Therefore, it is necessary to increase the pressing force. However, there is a concern that the chip 4a is cracked or chipped in this way.

  The upper elastic sheet 6 is set to about 5 mm with respect to the thickness of the mother block 4. As for the thickness of the elastic sheet 6, as the sheet thickness is increased, the pressing force from the pressing roller 3 is dispersed in the elastic sheet 6, so that the pressing force applied to the mother block 4 is reduced and separated accordingly. It becomes difficult to do. Accordingly, the thickness of the elastic sheet 6 is appropriately about 5 mm with respect to the block thickness of the mother block 4.

  The chip separating apparatus 1 includes a climbing prevention means for preventing the chip 4 a on the unseparated side 7 of the mother block 4 from being pushed up from the pressing point 3 a of the pressing roller 3 and climbing onto the mother block 4.

  As shown in FIG. 2, the climbing prevention means is provided in a state in which a clearance t less than the thickness of the mother block 4 is provided between the upper elastic sheet 6 and the mother block 4 on the unseparated side 7. It is constructed by pulling with the tension of.

  The upper elastic sheet 6 is supported by a pair of chucks 9, 9 disposed on the conveying jig 2, and a tension is applied via each chuck 9. Specifically, a tension of about 2 kgf is applied.

  A guide roller 10 that holds the upper elastic sheet 6 at the clearance t is disposed downstream of the pressing roller 3 in the conveying direction a. This guide roller 10 has a fixed relative positional relationship with the pressing roller 3.

  The guide roller 10 is provided in an area of at least 15% or more of the length in the conveying direction a of the mother block 4 from the pressing point 3a of the pressing roller 3. Specifically, the inter-axis distance c between the pressing roller 3 and the guide roller 10 is about 35 mm, and is set to about 25% of the length dimension of the mother block 4 in the transport direction a.

  The position of the guide roller 10 is regulated so that the clearance t between the upper elastic sheet 6 and the mother block 4 is always equal to or less than the thickness of the mother block 4. Specifically, the clearance t is arranged to be about 0.2 mm.

  Next, a chip separation method by the chip separation apparatus will be described.

  In the previous step, the mother block 4 is cut by a cutting blade along the vertical and horizontal cutting lines A1 and A2. The cut mother block 4 is placed on the lower elastic sheet 5 of the conveying jig 2. In this case, it arrange | positions so that the cutting blade approaching surface 4B side of the mother block 4 may become a lower surface.

  An upper elastic sheet 6 is disposed on the mother block 4. The upper elastic sheet 6 is wound around the guide roller 10 and a predetermined tension is applied to the elastic sheet 6. As a result, a clearance t equal to or less than the thickness of the mother block 4 is formed between the elastic sheet 6 and the mother block 4.

  In this state, the mother block 4 is pressed with a predetermined pressing force by the pressing roller 3 through the elastic sheet 6 while the conveying jig 2 is conveyed in the direction a. Then, a pressing force acts on the mother block 4 along the cutting lines A1 and A2, and thus the chips 4a are separated. After the chips 4a thus separated are fired at a high temperature, an external electrode is formed on the chips 4a, whereby a multilayer chip component is manufactured.

  According to this embodiment, the upper elastic sheet 6 is provided with a clearance t less than the thickness of the mother block 4 between the pressing point 3a of the pressing roller 3 and the mother block 4 on the unseparated side 7. Since the mother block 4 on the unseparated side 7 moves to the side opposite to the pressing roller 3, that is, the separated side 8 because the tension is pulled with a predetermined tension, a pushing force acts on the tip 4a on the non-separated side 7. Thus, it is possible to prevent boarding on the mother block 4. As a result, the chip 4a can be prevented from being cracked or chipped, and the product yield can be improved.

  That is, by providing the clearance t between the mother block 4 and the elastic sheet 6, the frictional force between the both 4 and 6 can be eliminated. Will move to the separated side 8 by pressing. In this case, even if a pushing force is generated in the tip 4 a on the non-separation side 7, the clearance t with the elastic sheet 6 is equal to or less than the thickness of the mother block 4, so that it does not ride on the mother block 4.

  Since a predetermined tension is applied to the elastic sheet 6, wrinkles can be suppressed in the elastic sheet 6, and the pressing force of the pressing roller 3 can be uniformly transmitted to the mother block 4 through the elastic sheet 6. The occurrence of unseparated chips due to variations in pressing force can be prevented. .

  Further, since the mother block 4 is pressed with the elastic sheet 6 interposed, it is possible to prevent the appearance failure of the chip 4a from being caused by the deposits attached to the pressing roller 3 and the unevenness of the roller surface.

  In the present embodiment, the guide roller 10 is disposed on the downstream side in the conveying direction a of the pressing roller 3, and the inter-axis distance c from the pressing point 3 a of the pressing roller 3 to the guide roller 10 is the length in the conveying direction a of the mother block 4. Since the height is set to 15% or more, the area in which the chip 4a is most likely to be pushed up can be covered, and the riding on the mother block 4 can be reliably prevented.

  In the present embodiment, the pressing surface 4A of the mother block 4 is the surface opposite to the cutting blade entry surface 4B of the mother block 4, so that the chip 4a can be easily separated. That is, since the close contact force is small on the entry surface 4B side of the cutting blade, the spread between the chips 4a on the cutting blade entry surface 4B side is increased by pressing from the pressing surface 4A side, and the tip 4a is easily made. Can be separated. As a result, the pressing force of the pressing roller 3 can be reduced, and unseparated chips can be reduced.

  FIG. 6 is a view for explaining a chip separation method according to the second embodiment of the present invention. In the figure, the same reference numerals as those in FIGS. 1 and 2 denote the same or corresponding parts.

  The present embodiment is an example in which the mother block 4 is arranged such that the cutting lines A1 and A2 cross obliquely with respect to the axis 3b of the pressing roller 3. Specifically, the mother block 4 is arranged so that the chip 4a ′ located at one corner of the mother block 4 is located at the tip in the transport direction a. When arranged in this way, the length of the mother block 4 in the transport direction a is about 189 mm.

  In the present embodiment, the mother block 4 is arranged so that the cutting lines A1 and A2 cross obliquely with respect to the axis 3b of the pressing roller 3, so that the pressing force is applied along the cutting lines A1 and A2 of the mother block 4. Will act evenly, and as a result, each chip 4a can be separated by a single separation step. Thus, it is desirable to separate both the short side and the long side of the mother block in a single separation step.

  FIG. 7 is a view for explaining a chip separation method according to the third embodiment of the present invention. In the figure, the same reference numerals as those in FIGS. 1 and 2 denote the same or corresponding parts.

  In the present embodiment, the elastic sheet 6 is disposed so as to abut on the mother block 4 on the non-separated side 7, and a clearance t less than the thickness of the mother block 4 is provided above the elastic sheet 6 to provide a stopper member 15. This is an example in which the climbing prevention means is configured.

  The stopper member 15 has a relative positional relationship fixed to the pressing roller 3 by a connecting member 16, and the stopper member 15 moves in the direction of the arrow together with the pressing roller 3.

  In the present embodiment, since the stopper member 15 is disposed with a clearance t less than the thickness of the mother block between the elastic sheet 6 disposed on the mother block 4 on the unseparated side 7 and accumulated. Even if the tip 4 a on the non-separation side 7 is pushed up by the pressing force, it can be suppressed by the stopper member 15, and it is possible to prevent climbing onto the mother block 4.

  In the first embodiment, the conveyance jig 2 is moved. In the second embodiment, the pressure roller 3 is moved. However, the present invention moves both the pressure roller and the conveyance table. Also good.

  Moreover, in the said embodiment, although the mother block was mounted in the conveyance jig, you may make it this invention mount on a table or a conveyor belt, and may convey. Further, when the mother block is conveyed, the mother block may be fixed by vacuum suction to the suction plate.

  In the said embodiment, although the mother block was mounted in the lower elastic body sheet | seat on a conveyance jig, you may make it as follows in this invention.

  An elastic sheet having adhesiveness is attached in advance to the mother block, and the mother block is cut with a cutting blade from the opposite side of the elastic sheet. Then, the mother block is inverted 180 degrees so that the cutting blade entry surface is on the lower surface side and placed on the conveying jig.

  In this case, as explained in FIG. 4 above, the surface of the mother block opposite to the cutting blade entry surface can be used as the pressing surface. Further, it is possible to facilitate the operation when the mother block is shifted from the cutting process to the separation process, and it is possible to prevent the chips from being scattered when the mother block is pressed by the pressing roller.

1 is a plan view of a chip separating apparatus for explaining a chip separating method according to a first embodiment of the present invention; It is a side view of the boarding prevention means of the chip separating apparatus. It is a figure which shows the pushing amount of the press roller of the said chip separation apparatus. It is a figure which shows the isolation | separation state of each chip | tip of the said chip separation apparatus. It is a figure which shows the problem of the isolation | separation state of each chip | tip. It is a top view of the chip separation device for explaining the chip separation method by a 2nd embodiment of the present invention. It is a side view of the chip separation device for explaining the chip separation method by a 3rd embodiment of the present invention. It is a figure which shows the conventional problem.

Explanation of symbols

3 Pressing roller 3a Pressing point 4 Mother block 4a Tip 4A Pressing surface 4B Cutting blade entry surface 6 Elastic sheet 7 Unseparated side 8 Separated side 15 Stopper member t Clearance A1, A2 Cutting line

Claims (7)

  An elastic sheet is disposed on a mother block cut into a large number of chips along a cutting line, and a pressure roller is disposed on the elastic sheet, and the mother block is disposed through the elastic sheet with the pressure roller. In the chip separation method in which the mother block is separated into the chips along the cutting line by pressing and moving the pressure roller and the mother block relatively in one direction, the pressing point of the pressure roller Riding prevention means for preventing the unseparated chip from riding on the mother block by providing a predetermined clearance on the mother block in a certain range from the position to the unseparated side in the relative movement direction. A chip separation method.   2. The chip separation method according to claim 1, wherein the climbing prevention means is applied over an area of at least 15% of the length in the relative movement direction of the mother block from the pressing point of the pressing roller.   3. The climbing prevention means according to claim 1, wherein the climbing prevention means has a predetermined tension and a predetermined direction so that a clearance less than a thickness of the mother block is provided between the elastic sheet and the unseparated mother block. 2. A chip separating method comprising:   3. The climbing prevention means according to claim 1 or 2, wherein a relative positional relationship with the pressing roller is fixed, and a clearance less than a thickness of the mother block is provided between the elastic member on the unseparated side. A chip separation method comprising a stopper member arranged.   5. The chip separating method according to claim 1, wherein the mother block is disposed so that the cutting line obliquely intersects the axis of the pressing roller. 6.   6. The chip separating method according to claim 1, wherein a pressing surface of the pressing roller with respect to the mother block is a surface opposite to a cutting blade entering surface when the mother block is cut.   An elastic sheet is disposed on a mother block cut into a large number of chips along a cutting line, and a pressure roller is disposed on the elastic sheet, and the mother block is disposed through the elastic sheet with the pressure roller. In the chip separating apparatus, which presses and moves the pressing roller and the mother block relatively in one direction to separate the mother block into the chips along the cutting line, the pressing point of the pressing roller Provided with an anti-climbing means for preventing the unseparated chip from riding on the mother block by providing a predetermined clearance on the mother block within a certain range of the relative movement direction to the unseparated side. A chip separator characterized by the above.

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