JP2006224250A - Punching method and punching device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a punching device having a simple configuration efficiently and securely collecting a plurality of punched pieces. <P>SOLUTION: The punching device is provided with a male die 11 and a female die 12 which are opposingly disposed interposing a green sheet 2. A plurality of projection parts 11a having a larger projection height than the thickness of the green sheet 2 are formed on the opposed face of the male die 11 to the female die while the female die 12 is composed of a tabular member having a smaller thickness than the height of the projection parts 11a, and through-holes 12a are opened at the corresponding position to the respective projection parts 11a for the female die 12. An adhesive tape 14 is disposed covering the plurality of through-holes 12a on the back surface side of the female die 12, a pressure member 13 pressurizing the female die 12 toward the male die 11 is disposed through the adhesive tape 14 on the back surface side of the adhesive tape 14, and an elastic member 13a is mounted on the opposed face of the pressure member 13 to the adhesive tape 14. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a punching method and a punching device for punching a flat plate-like workpiece such as a green sheet to make a punching hole.

  Conventionally, in a ceramic multilayer substrate manufacturing process, via holes that electrically connect layers are formed by punching a green sheet to form a plurality of punch holes, and then filling each punch hole with a conductive paste. .

As shown in FIG. 4, in a conventional punching device for punching holes in a green sheet, a pair of press plates (31) (31) to which an upper die (32) and a lower die (33) are respectively attached. Are arranged opposite to each other, and on the surface of the upper mold (32), a plurality of convex portions (32a) are formed toward the lower mold (33), and the upper mold (33) A through hole (33a) is opened at a position corresponding to each convex portion (32a) of the mold (32).
The direction in which the press plates (31) and (31) are brought closer to each other in a state where the green sheet (34) to be punched is sandwiched between the upper mold (32) and the lower mold (33) The green sheet (34) is punched out by the convex part (32a) of the upper mold (32) and the through hole (33a) of the lower mold (33) by driving to the predetermined position of the green sheet (34). A punching hole is drilled in (see Patent Document 1).

  In the punching device, the protrusion (32a) of the upper mold (32) punches out the green sheet (34), so that the punching piece (34a) is placed in the through hole (33a) of the lower mold (33). Will remain. Therefore, in order to continuously perform the drilling operation, it is necessary to remove the punched piece (35) from the through hole (33a).

Therefore, in order to efficiently remove the punched piece, a punching device shown in FIG. 5 has been proposed.
The perforating apparatus places a green sheet (42) on a cradle (44) in which a through hole (44a) is opened, and the outer periphery of the green sheet (42) is supported by a frame (43) ( 44) With the punch pressed against the through hole (44a) of the cradle (44), the green sheet (42) is punched out by punching the green sheet (42). It is to be established.
A suction device (45) is disposed below the through hole (44a) of the cradle (44), and the punching piece (42a) of the green sheet (42) is removed from the through hole (44a) by the suction device (45). Remove by suction. (See Patent Document 2).
JP 7-22146 A [H05K 3/40] JP-A-5-318448 [B28B 11/12]

Therefore, in the punching apparatus as shown in FIG. 4 that can simultaneously punch a plurality of punching holes in the green sheet, as a method of removing a plurality of punching pieces generated in the punching operation at once, for example, a lower mold ( 33) is provided with an opening in one press plate (31) and a suction device as shown in FIG. 5 is provided to cover the opening, and the suction device opens the lower mold (33). A method of sucking and removing the punched pieces (34a) from all the through holes (33a) can be considered.
However, this method requires a suction device that can cover the plurality of through holes (33a) opened in the lower mold (33), and thus there is a problem that the perforation device becomes large-scale. .
Depending on the mounting accuracy of the upper die (32) and lower die (33) on the press plate (31), some punched holes may be distorted or the punched piece (34a) may be completely There was a problem that the green sheet (34) remained partially connected without being punched (hereinafter referred to as punching defect).

  Therefore, an object of the present invention is to pierce a plurality of punched holes in a short time, and to recover a plurality of generated punched pieces efficiently and reliably, as well as to improve the shape of the punched holes and reduce punching defects. It is an object of the present invention to provide a drilling device and a drilling method having a simple configuration that can be avoided.

  The present invention is to sandwich at least one of the molds (11) and (12) in a direction in which both the molds (11) and (12) are brought close to each other by sandwiching a flat workpiece between the male mold (11) and the female mold (12). With respect to a method of drilling a plurality of punched holes in a workpiece by driving a mold, a plurality of convex portions (11a) are provided on a surface of the male mold (11) facing the female mold (12). On the other hand, the female mold (12) is composed of a flat plate-like member, and the female mold (12) has a position corresponding to each convex portion (11a) of the male mold (11). A through hole (12a) is opened, and a workpiece is punched out by a convex portion (11a) of the male mold (11) and a through hole (12a) of the female mold (12) to form a punch hole.

In the punching method according to the present invention, an adhesive sheet is provided on the back side of the female mold (12) so as to cover the plurality of through holes (12a), and the female mold is provided on the back side of the adhesive sheet. A first step of disposing an elastic member (13a) having a flat surface capable of covering the plurality of through holes (12a) of (12);
With the workpiece sandwiched between the male mold (11) and the female mold (12), drive at least one of the molds in the direction in which the molds (11) and (12) are brought close to each other. Thus, simultaneously punching a plurality of punch holes in the workpiece, the elastic member (13a) is pressed against the back surface of the female die (12) via the adhesive sheet, and the punch holes are formed. A second step of adhering a plurality of punched pieces (21) generated on the surface of the adhesive sheet;
A third step of taking out the workpiece after perforation from between both molds (11) and (12), and collecting a plurality of punched pieces (21) attached to the adhesive sheet together with the adhesive sheet.
Examples of the workpiece include a green sheet made of a ceramic material containing a dielectric magnetic composition, an organic binder, a plasticizer, and the like.

In the punching method of the present invention, the punched piece (21) of the workpiece is formed by the protrusion (11a) of the male mold (11) in the process of punching the workpiece in the second step. ) Is pushed out toward the through hole (12a) of the female die (12), whereby the punched piece (21) passes through the through hole (12a) of the female die (12) and the tip thereof is female. It will protrude from the back of the mold (12).
The punched piece (21) protruding from the back surface of the female die (12) presses the elastic member (13a) via the adhesive sheet provided on the back side of the female die in the first step. As a result, elastic deformation occurs in the portion of the elastic member (13a) facing the punched piece (21), and the surface of the facing portion retreats by the protruding amount of the punched piece (21). Thereby, the protrusion of the punched piece (21) is allowed.
After the convex part (11a) of the male mold (11) has penetrated the workpiece and the punched hole has been drilled in the workpiece, in the third step, both the molds (11) and (12) The workpiece after punching is taken out from the space, and a plurality of punched pieces (21) attached to the adhesive sheet are collected together with the adhesive sheet to complete the punching operation.
According to the punching method of the present invention, the punched piece (21) of the work piece is attached to the pressure-sensitive adhesive sheet in the process of punching the work piece, and a plurality of pieces attached to the pressure-sensitive adhesive sheet after punching. Since the punched piece (21) can be collected together with the pressure-sensitive adhesive sheet, the efficiency of drilling work and the time can be reduced.

  In a specific configuration, each protrusion (11a) of the male mold (11) has a protruding height larger than the thickness of the workpiece, and the flat plate member constituting the female mold (12) is The male mold (11) has a thickness smaller than the height of the convex portion (11a).

  According to the specific configuration, when at least each convex portion (11a) of the male die (11) penetrates the workpiece, the tip of the punched piece (21) of the workpiece is the female die (12 ) Protrudes from the back surface of the sheet, so that the punched piece (21) can be reliably attached to the adhesive sheet.

Further, the perforating apparatus according to the present invention includes a male die (11) and a female die (12) to be disposed opposite to each other with a flat plate-like workpiece interposed therebetween, and both the dies (11) and (12). A drive mechanism (15) for driving at least one of the molds in the approaching direction, and a plurality of protrusions (11a) on the surface of the male mold (11) facing the female mold (12) On the other hand, the female mold (12) is composed of a flat plate-like member, and the female mold (12) has a position corresponding to each convex portion (11a) of the male mold (11). A through hole (12a) is opened, and a workpiece is punched out by a convex portion (11a) of the male mold (11) and a through hole (12a) of the female mold (12) to form a punch hole.
On the back side of the female mold (12), an adhesive sheet is provided to cover the plurality of through holes (12a), and on the back side of the adhesive sheet, a plurality of female molds (12) are provided. An elastic member (13a) having a flat surface capable of covering the through hole (12a) is provided, and a workpiece is sandwiched between the male mold (11) and the female mold (12). By driving at least one of the molds by the drive mechanism (15), a plurality of punching holes are formed in the workpiece, and at the same time, the back surface of the female mold (12) is interposed through the adhesive sheet. The elastic member (13a) is pressed, and a plurality of punched pieces (21) generated along with the punching holes are adhered to the surface of the adhesive sheet.
Specifically, a pressure member (13) constituting the drive mechanism (15) is provided on the back side of the pressure-sensitive adhesive sheet, and the pressure member (13) is opposed to the pressure-sensitive adhesive sheet, An elastic member (13a) is attached.

  In the above-described punching device of the present invention, when performing a punching operation, the pressing member is driven by the drive mechanism (15) in a state where the workpiece is sandwiched between the male mold (11) and the female mold (12). (13) is driven in a direction approaching the female mold (12), and the pressure member (13) is pressed against the back surface of the female mold (12) via the adhesive tape (14). Thus, the female die (12) presses the workpiece against the convex portion (11a) of the male die (11), and the convex portion (11a) and the through hole (12a) of the female die (12). A punching hole is formed in the workpiece.

In the process of punching the workpiece, the punched piece (21) of the workpiece is inserted into the through hole (12a) of the female die (12) by the convex portion (11a) of the male die (11). As a result, the punched piece (21) protrudes from the back surface of the female die (12) through the through hole (12a) of the female die (12).
The punched piece (21) protruding from the back surface of the female die (12) presses the elastic member (13a) attached to the pressure member (13) via the adhesive sheet, thereby the elastic member (13a ) Is elastically deformed, and its surface retreats by the protruding amount of the punched piece (21), so that the punched piece (21) is allowed to protrude.
Further, the punched piece (21) is kept in close contact with the adhesive sheet by the repulsive force of the elastic member (13a).
Therefore, according to the punching apparatus of the present invention, the punched piece (21) of the workpiece is attached to the adhesive sheet in the process of punching the punched hole in the workpiece, and is attached to the adhesive sheet after punching. Since a plurality of punched pieces (21) can be collected together with the pressure-sensitive adhesive sheet, the efficiency of drilling work can be improved and the time can be shortened.

In a specific configuration, the pressure-sensitive adhesive sheet is formed of a strip-shaped pressure-sensitive adhesive tape (14) having an adhesive surface facing the female mold (12), and one end portion in the longitudinal direction of the pressure-sensitive adhesive tape (14). Is wound in a roll shape, and the other end is connected to the winding device (19).
In the specific configuration, the adhesive tape (14) to which the punched piece (21) is attached is taken up by the winding device (19), whereby the punched piece (21) is collected and a new adhesive tape (14) is obtained. The adhesive surface can be supplied at the same time, which can further increase the efficiency and time of the drilling operation.

  According to the drilling method and the punching apparatus of the present invention, a plurality of punched holes can be punched in a short time with a simple configuration, and the generated punched pieces can be recovered efficiently and reliably, and punching is performed. It is possible to improve the hole shape and avoid punching defects.

Hereinafter, the embodiment in which the present invention is implemented in a green sheet punching device will be specifically described with reference to the drawings.
As shown in FIG. 1, a perforating apparatus (1) according to the present invention comprises a male mold (11), a green sheet (2) and a female mold (12), which will be described later, on a machine base (10) having a horizontal surface. A movable stage (17) to be installed is provided, and a drive mechanism (15) for driving the female mold (12) in the direction of approaching the male mold (11) is provided at the top of the drilling device (1). It has been. The drive mechanism (15) includes a cylindrical rod portion (15a) that is driven up and down, and a flat plate-like pressure member (13) is attached to the tip of the rod portion (15a). An elastic member (13a) made of a urethane sheet having a Shore A hardness of 90 degrees and a thickness of 15 mm is attached to the surface of the pressure member (13) facing the machine base (10).
A strip-shaped adhesive tape (14) is provided below the pressure member (13), and one end in the longitudinal direction of the adhesive tape (14) is provided at the left end of the punching device (1). The shaft (19a) is wound in a roll shape. A winding device (19) for winding the adhesive tape (14) is provided at the right end of the punching device (1), and the other end of the adhesive tape (14) is disposed on the winding device (19). Is connected to the take-up shaft (19b).

  A cylinder mechanism (16) for driving the movable stage (17) in the horizontal direction is disposed on the machine base (10), and the movable stage (17) is pressed by the cylinder mechanism (16). It reciprocates in the horizontal direction between the first position below (13) and the second position on the near side. In addition, an operation unit (18) for starting / stopping the drive mechanism (15), the winding device (19), and the cylinder mechanism (16) is provided on the front side of the machine base (10).

  As shown in FIG. 2 (a), the male mold (11) and the female mold (12) are arranged to face each other with the green sheet (2) in between, and the female mold (11) of the male mold (11) ( A plurality of protrusions (11a) having a protrusion height larger than the thickness of the green sheet (2) are provided on the surface facing 12). On the other hand, the female mold (12) is a flat plate having a thickness smaller than the height of the convex portion (11a), and the female mold (12) includes each convex portion ( Through holes (12a) are respectively opened at positions corresponding to 11a). The thicknesses of the male mold (11), the green sheet (2) and the female mold (12) are 3 mm, 0.15 mm and 0.07 mm, respectively, of the convex part (11a) of the male mold (11). The protruding height is 0.175 mm.

  In the drilling device (1) of the present invention, when performing a drilling operation, first, the movable stage (17) shown in FIG. 1 is moved to the second position on the near side, and on the movable stage (17), The male mold (11), the green sheet (2), and the female mold (12) are respectively positioned and overlapped at predetermined positions in the horizontal direction.

Next, after the movable stage (17) is moved to the first position below the pressure member (13), the pressure member (13) is lowered toward the first position by the drive mechanism (15). As a result, as shown in FIG. 2 (b), the pressure member (13) is pressed against the back surface of the female mold (12) via the adhesive tape (14).
When the pressure member (13) is further lowered, the pressure member (13) presses the female mold (12) downward, whereby the green sheet (2) is protruded from the male mold (11). Pressed against (11a).
Then, as shown in FIG. 2 (c), the convex portion (11a) of the male mold (11) penetrates the green sheet (2), and a punched hole is formed in the green sheet (2).

In the process of punching the green sheet (2), the punched piece (21) of the green sheet (2) is inserted into the through hole of the female mold (12) by the convex part (11a) of the male mold (11). As shown in FIG. 3, the punched piece (21) passes through the through hole (12a) of the female die (12), and the tip of the punched piece (21) is pushed toward the female die (12). Will protrude from the back of the.
When the tip of the punched piece (21) protrudes from the back surface of the female die (12), the punched piece (21) attaches the elastic member (13a) of the pressure member (13) via the adhesive tape (14). As a result, the elastic member (13a) is elastically deformed at the portion of the elastic member (13a) facing the punched piece (21), and the surface of the facing portion retreats by the amount of protrusion of the punched piece (21). Thereby, the protrusion of the punched piece (21) is allowed.
Further, the punched piece (21) is kept in close contact with the adhesive tape (14) by the elastic repulsive force of the elastic member (13a).

  Next, as shown in FIG. 2 (d), after raising the pressure member (13), the punched green sheet (2) is taken out from between the molds (11) and (12), and the above-mentioned The adhesive tape (14) is wound up by a certain amount by the winding device (19), and a plurality of punched pieces (21) attached to the adhesive tape (14) are collected together with the adhesive tape (14) to complete the punching operation. To do.

As described above, according to the punching device (1) of the present invention, the punched piece (21) of the green sheet (2) is applied to the adhesive tape (14) in the process of punching the punched hole in the green sheet (2). Therefore, after punching, a plurality of punched pieces (21) attached to the adhesive tape (14) can be collected together with the adhesive tape (14), thereby improving the efficiency of drilling work and shortening the time. I can plan.
Moreover, since the punching device (1) according to the present invention comprises a winding device (19) for the adhesive tape (14), the punching piece (21) is adhered to the punching device (19) by the winding device (19). The recovery of (14) and the supply of a new adhesive surface of the adhesive tape (14) can be performed at the same time, thereby further improving the efficiency and shortening of the drilling operation.
When the formed punched hole was observed, it had a desired shape without distortion, and no punching defect occurred. This is considered to be because the tolerance of accuracy in the thickness direction of the green sheet (2) with respect to the green sheet (2) of the female mold (12) is expanded by providing the elastic member (13a).

  In addition, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim. For example, in the present embodiment, the elastic member (13a) is provided integrally with the pressure member (13), but instead, for example, the elastic member (13a) is added between the pressure member (13) and the adhesive tape (14). It is also possible to adopt a configuration in which a sheet-like elastic member (13a) separate from the pressure member (13) is interposed.

1 is a perspective view of a punching device according to the present invention. It is a series of process diagrams showing a drilling operation by the punching device. It is sectional drawing which expands and shows the principal part of FIG.2 (c). It is sectional drawing which shows the structure of the conventional punching apparatus. It is sectional drawing which shows the other structure of the conventional punching apparatus.

Explanation of symbols

(1) Drilling device
(11) Male mold
(11a) Convex
(12) Female mold
(12a) Through hole
(13) Pressure member
(13a) Elastic member
(14) Adhesive tape
(15) Drive mechanism
(17) Movable stage
(19) Winding device
(2) Green sheet
(21) Punched piece

Claims (7)

At least one of the molds is driven in the direction in which both molds (11) and (12) are brought close to each other, with a flat plate-shaped workpiece sandwiched between the male mold (11) and the female mold (12). In this way, a plurality of punched holes are formed in the workpiece, and the plurality of convex portions (11a) protrude from the surface of the male die (11) facing the female die (12). On the other hand, the female mold (12) is composed of a flat plate-like member, and the female mold (12) penetrates the respective positions corresponding to the convex portions (11a) of the male mold (11). In a drilling method in which a hole (12a) is opened and a workpiece is punched out by punching a workpiece by the convex portion (11a) of the male mold (11) and the through hole (12a) of the female mold (12),
An adhesive sheet is provided on the back side of the female mold (12) so as to cover the plurality of through holes (12a), and a plurality of through holes of the female mold (12) are provided on the back side of the adhesive sheet. A first step of providing an elastic member (13a) having a flat surface capable of covering (12a);
With the workpiece sandwiched between the male mold (11) and the female mold (12), drive at least one of the molds in the direction in which the molds (11) and (12) are brought close to each other. Thus, simultaneously punching a plurality of punch holes in the workpiece, the elastic member (13a) is pressed against the back surface of the female die (12) via the adhesive sheet, and the punch holes are formed. A second step of adhering a plurality of punched pieces (21) generated on the surface of the adhesive sheet;
A third step of taking out the workpiece after perforation from between both molds (11) and (12) and collecting a plurality of punched pieces (21) adhering to the adhesive sheet together with the adhesive sheet; A drilling method characterized by the above.   Each projection (11a) of the male mold (11) has a protruding height larger than the thickness of the workpiece, and the flat plate member constituting the female mold (12) is the male mold. The drilling method according to claim 1, wherein the perforation method has a thickness smaller than the height of the convex portion (11a) of (11).   The perforation method according to claim 1, wherein the workpiece is a green sheet made of a ceramic material including a dielectric magnetic composition, an organic binder, and a plasticizer. A male mold (11) and a female mold (12) to be disposed opposite each other with a flat plate-shaped workpiece interposed therebetween, and at least one of the molds in a direction in which both molds (11) and (12) are brought close to each other A drive mechanism (15) for driving the mold, and a plurality of protrusions (11a) project from the opposite surface of the male mold (11) to the female mold (12), while the female mold (12) is composed of a flat plate member, and the female mold (12) is provided with through holes (12a) at positions corresponding to the convex portions (11a) of the male mold (11), In a punching device for punching a workpiece by punching a workpiece by a convex part (11a) of a male mold (11) and a through hole (12a) of a female mold (12),
On the back side of the female mold (12), an adhesive sheet is provided to cover the plurality of through holes (12a), and on the back side of the adhesive sheet, a plurality of female molds (12) are provided. An elastic member (13a) having a flat surface capable of covering the through hole (12a) is provided, and a workpiece is sandwiched between the male mold (11) and the female mold (12). By driving at least one of the molds by the drive mechanism (15), a plurality of punching holes are formed in the workpiece, and at the same time, the back surface of the female mold (12) is interposed through the adhesive sheet. A punching device, wherein the elastic member (13a) is pressed to attach a plurality of punched pieces (21) generated by the punching holes to the surface of the adhesive sheet.   Each projection (11a) of the male mold (11) has a protruding height larger than the thickness of the workpiece, and the flat plate member constituting the female mold (12) is the male mold. The punching device according to claim 4, wherein the punching device has a thickness smaller than the height of the convex portion (11a) of (11).   A pressure member (13) constituting the drive mechanism (15) is provided on the back side of the pressure-sensitive adhesive sheet, and the elastic member (13a) is disposed on a surface of the pressure member (13) facing the pressure-sensitive adhesive sheet. The perforating apparatus according to claim 4 or 5, to which is attached.   The pressure-sensitive adhesive sheet is formed by a strip-shaped pressure-sensitive adhesive tape (14) having an adhesive surface facing the female mold (12), and one end portion in the longitudinal direction of the pressure-sensitive adhesive tape (14) is wound in a roll shape. The punching device according to any one of claims 4 to 6, wherein the punching device is rotated and the other end is connected to the winding device (19).

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