JP2007250737A - Mother board processing die, method of manufacturing process board, and method of manufacturing product board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mother board processing die which has no need of remaking the entire die even when the shape or size of a printed circuit board changes or the size of a mounting board changes, and methods of manufacturing a process board and product board, using the same. <P>SOLUTION: In the mother board processing die 1 along the transport direction of a mother board a pushback part 3, an idling region 7 and an outer shape cutting part 5 are disposed in this order, the pushback part 3 may be replaced with any means for pushing back printed circuit boards different in shape and/or disposition, the cutting part 5 has a cutting line forming means for forming elongated holes and small holes dispersively on and near a cutting line for obtaining narrow mounting boards when the pushback 3 is replaced with any means for pushing back the printed circuit boards from a narrow area, and the cutting line forming means is removable from the outer shape cutting part 5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a mold for processing a mother board, a method for manufacturing a processed board, and a method for manufacturing a product board. More specifically, a product board (for example, a printed circuit board) is temporarily fixed to a frame portion by pushback processing. The present invention relates to a base plate processing mold for manufacturing a processed plate (for example, a mounting substrate), a method of manufacturing a processed plate using the same, and a method of manufacturing a product plate obtained from such a processed plate.

  In recent years, with the miniaturization of electronic devices, there has been an increasing demand for miniaturization and modification of printed circuit boards used in electronic devices. On the other hand, an electronic component automatic mounting machine (hereinafter referred to as “self-mounting machine”) such as a chip mounter or an automatic insertion machine for mounting electronic components on a printed circuit board is referred to as the size of a workpiece because of its conveyance. Have upper and lower limits. Moreover, the external shape of the workpiece | work used for a self-machine is required to be substantially rectangular, ie, at least one side is a straight line, and at least one of the orthogonal sides includes a straight line.

  Therefore, when mounting electronic components on a small and irregular printed circuit board using a self-mounting machine, first, a plurality of printed circuit boards are formed on the printed wiring board, and the V-cut method and pushback method are used. Using a perforation method, etc., the printed circuit board is temporarily fixed to the original printed wiring board, and then the printed wiring board has a size and shape that can be conveyed by the self-equipment. A method of cutting a substrate (mounting substrate) is used.

Of these, the V-cut method inserts V-shaped, U-shaped and other concave grooves (V-cut) along the printed circuit boundary printed on the printed wiring board, and mounts electronic components on the printed circuit. And then breaking along the V-cut. Therefore, the V-cut method can be applied only to a printed circuit board whose outer shape is linear.
The perforation method is a method in which a large number of small holes are formed along the boundary line of the printed circuit board and the holes are broken along the small holes. The perforation method is applicable only to a printed circuit board that does not require dimensional accuracy of the outer shape, because unevenness remains on the boundary line after fracture.

  On the other hand, in the pushback method, the printed circuit board is punched out using a blade having a predetermined shape while holding the printed wiring board between the upper mold and the lower mold, and then the punched printed circuit board is removed from the original hole. It is a method of fitting. The pushback method has a high dimensional accuracy of the outer shape and there is no restriction on the shape of the printed circuit board, and is therefore an effective method particularly when electronic components are automatically mounted on a deformed printed circuit board.

The processing of printed wiring board using the pushback method is generally
(1) Form a reference hole for pushback on the printed wiring board on which the electric circuit is printed,
(2) Push-back processing of the printed circuit board using the push-back mold, and drilling of component holes as necessary,
(3) Cutting the outer shape of the printed wiring board using an outer cutting die and cutting out a mounting board including a predetermined number of printed circuit boards from the mother board.
Has been done.

  However, the pushback process generally tends to warp because a strong shearing force acts on the printed wiring board. Conventionally, pushback processing and outline cutting have been generally performed using separate molds. However, if only pushback processing is performed continuously on the base plate, large warpage will occur in the base plate. There is a problem that it becomes difficult to cut the outer shape. In addition, a pushback mold and an outer cutting mold are required, which increases the cost. Further, if the manufactured mounting board is warped or has a relatively large residual stress, it is difficult to remove the printed circuit board from the frame portion.

In order to solve this problem, various proposals have heretofore been made.
For example, in Patent Document 1, the printed circuit board is disposed upstream of the printed wiring board conveyance direction, and the printed circuit board is punched from the printed wiring board, and the punched printed circuit board is fitted into the original hole. And a pushback means, and a printed circuit board that is disposed downstream of the printed wiring board transport direction and includes one or more printed circuit boards that are pushed back. A printed wiring board processing die having an outer shape cutting means is disclosed.
In this document, since the area pushed back by the pushback means is sequentially separated by the outline cutting means, the outline cutting can be easily performed without being greatly affected by the warp of the printed wiring board, and one metal It describes that the die cost can be reduced because push back processing and external cutting processing can be performed with the mold.

  Further, Patent Document 2 discloses a pushback means that is disposed upstream of the conveying direction of the mother board, punches the punched board from the mother board, and fits the punched board into the original hole. And an outer shape cutting means for cutting out from the mother plate a processed plate including one or more punched plates that are arranged on the downstream side with respect to the conveying direction of the mother plate and are pushed back. In the plate processing mold, flat punching means for pressing the mother board in which the punched board is fitted between the pushback means and the outer shape cutting means to flatten the surface of the mother board is further provided. A mother board machining die provided is disclosed. By adopting such a configuration in the same document, it becomes possible to manufacture a flat processed plate without deformation or damage around the through hole or the like regardless of the material of the base plate, the shape of the punched plate, etc. In addition, it describes that the mold cost and the man-hour can be reduced.

JP 2002-233996 A JP 2004-247499 A

The dimensions of the mounting board generally vary depending on the shape and size of the printed circuit board, the number of printed circuit boards formed on the mounting board, and the like. However, due to restrictions such as the size of the workpiece (the workpiece is obtained by dividing the printed wiring board having a standardized size at a predetermined interval), the specifications of the press machine, the specifications of the self-feed machine, etc. In many cases, the length of one side of the substrate is the same among two orthogonal sides.
On the other hand, the metal mold | die currently disclosed by patent document 1, 2 has the advantage that the board | substrate for mounting with few curvature can be manufactured at low cost. However, since these molds are molds in which the pushback means and the external cutting means are integrated, when the shape and size of the printed circuit board or the shape and size of the mounting substrate are changed, The entire mold had to be rebuilt. For this reason, the mold for which the production of the mounting substrate having a specific shape has been completed has to be discarded as it is, which causes the mold cost to increase.

The problem to be solved by the present invention is that even when the shape and size of the product board (printed circuit board) changes or the size of the processed board (mounting board) changes, the entire mold is It is an object of the present invention to provide a base plate processing mold that does not need to be remade, a method of manufacturing a processed plate using the same, and a method of manufacturing a product plate that obtains a product plate from the processed plate.
In addition, another problem to be solved by the present invention is that it is possible to manufacture a mounting substrate that has a high material yield, can cope with a change in the size of a processed plate (mounting substrate), and has less warpage. It is to provide a mold for processing a base plate, a method for manufacturing a processed plate using the same, and a method for manufacturing a product plate for obtaining a product plate from the processed plate.

In order to solve the above problems, a mother board machining die according to the present invention is:
A first pushback which is arranged upstream with respect to the conveying direction of the mother board, for punching out one or more first product boards from the mother board and fitting the punched first product boards into the original holes. Means,
An outer shape cutting means for cutting out the first processed plate including one or more of the first product plates, which is disposed downstream of the conveying direction of the mother plate and pushed back, from the mother plate; In the mold for mother board processing,
The first pushback means punches one or more second product plates having a shape and / or arrangement different from the first product plate from the mother plate, and the punched second product plate It can be replaced with the second pushback means that fits into the original hole,
When the first pushback means is replaced with the second pushback means for pushing back the second product plate from a region narrower than the lateral width of the first processed plate, Cutting line forming means for discretely forming long holes and / or small holes on or near the cutting line for obtaining a second processed plate having a narrower width than the processed plate;
The gist of the cutting line forming means is that it is detachable from the outline cutting means.
In this case, a blanking region having a length corresponding to the length in the conveyance direction of the first processed plate is further provided between the first pushback unit and the outer shape cutting unit. The hitting area and the outer shape cutting means are preferably arranged at equal intervals so that the distance between these reference points is equal to the transport distance per time of the mother board.

The gist of the first method of manufacturing a processed plate according to the present invention is that it includes the following steps.
(B) The mother board machining die according to claim 1, comprising the first pushback means and the cutting line forming means removed.
In the first pushback means, a pushback step of punching one or more first product plates (A) from the mother plate and fitting the punched first product plates (A) into the original holes.
(B) The first product plate (A) is transported so that the first product plate (A) is on the outer shape cutting means, and in the first pushback means, one or more first product plates ( B) is newly punched, and the first product plate (B) thus punched is inserted into the original hole,
In the outer shape cutting means, an outer shape cutting step of cutting the first processed plate including the first product plate (A) pushed back in the immediately preceding press from the mother plate.

Further, the second aspect of the method for producing a processed plate according to the present invention includes the following steps.
(A) The mother board processing mold according to claim 1, wherein the first pushback means is replaced with the second pushback means, and the cutting line forming means is attached.
In the second pushback means, a pushback step of punching one or more second product plates (A) from the mother plate and fitting the punched second product plates (A) into the original holes.
(B) The mother plate is conveyed so that the second product plate (A) is on the outer shape cutting means, and one or two or more second product plates (from the mother plate in the first pushback means) B) is newly punched, and at the same time, the punched second product plate (B) is inserted into the original hole,
The external cutting means includes the second product plate (A) formed in the long hole and / or the small hole along the cutting line or in the vicinity thereof, and pushed back in the immediately preceding press, and unnecessary. An outer shape cutting step of cutting out the second processed plate to which the portions are connected from the mother plate.
(C) An unnecessary portion breaking step of breaking the unnecessary portion along the cutting line to obtain the second processed plate.

Further, the third aspect of the method for producing a processed plate according to the present invention includes the following steps.
(A) Using the mold for processing a mother board according to claim 2, comprising the first pushback means, and the cutting line forming means is removed.
In the first pushback means, a pushback step of punching one or more first product plates (A) from the mother plate and fitting the punched first product plates (A) into the original holes.
(B) The first product plate (A) is transported so that the first product plate (A) is on the blanking region, and one or more first product plates from the mother plate in the first pushback means. (B) is newly punched, and the first product plate (B) thus punched is inserted into the original hole,
A blanking step of pressing the base plate in which the first product plate (A) pushed back in the immediately preceding press is fitted in the blanking region.
(C) The first product plate (A) and the first product plate (B) are transported so that the first product plate (B) is on the outer shape cutting means and the blanking area, respectively, and the pushback means , One or more first product plates (C) are newly punched from the mother plate, the punched first product plate (C) is fitted into the original hole, At the same time as pressing the base plate in which the first product plate (B) pushed back in the press is fitted,
In the outer shape cutting means, an outer shape cutting step of cutting the first processed plate including the first product plate (A) pushed back in the press two times before from the mother plate.

Furthermore, the fourth aspect of the method for manufacturing a processed plate according to the present invention is to include the following steps.
(A) The first pushback means is replaced with the second pushback means, and the cutting line forming means is attached.
In the second pushback means, a pushback step of punching one or more first product plates (A) from the mother plate and fitting the punched second product plates (A) into the original holes.
(B) The mother plate is transported so that the second product plate (A) is on the blanking region, and one or more second product plates from the mother plate in the second pushback means. (B) is newly punched and the second product plate (B) punched is inserted into the original hole,
A blanking step of pressing the base plate in which the second product plate (A) pushed back in the immediately preceding press is inserted in the blanking region.
(C) transporting the base plate so that the second product plate (A) and the second product plate (B) are respectively on the outer shape cutting means and the blanking region; , One or more second product plates (C) are newly punched from the base plate, the punched second product plate (C) is fitted into the original hole, At the same time as pressing the base plate in which the second product plate (B) pushed back in the press is fitted,
In the outer shape cutting means, the second product plate (A) formed by forming the elongated hole and / or the small hole along the cutting line or in the vicinity thereof and pushed back in the press twice before, and The outer shape cutting step of cutting out the second processed plate to which the unnecessary portion is connected from the mother plate.
(D) An unnecessary part breaking step of breaking the unnecessary part along the cutting line to obtain the second processed plate.
Furthermore, the gist of the manufacturing method of the product plate according to the present invention is to break the frame portion of the processed plate obtained by the method according to the present invention and separate the product plate.

When the first pushback means is replaceable and the cutting line forming means is detachably provided in the outer cutting means, the maximum width dimension is obtained when the pushback and outer cutting are performed with the cutting line forming means removed. The 1st processed board which has can be manufactured.
On the other hand, if the first pushback means is replaced with the second pushback means, the cutting line forming means is attached to the outer cutting means, and the pushback and the outer cutting are performed in this state, the second processing having a lateral width narrower than the maximum dimension. A board can be manufactured. Therefore, two or more types of processed plates having different width dimensions can be manufactured at low cost.
Furthermore, if a blanking area corresponding to the length in the conveyance direction of the processed plate is provided between the pushback unit and the outer shape cutting unit, the cutting interval of the processed plate can be reduced to the ultimate without reducing the mold life. Material yield can be improved.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the following description, an example in which the present invention is applied to the manufacture of a mounting board including a printed circuit board that has been subjected to pushback and pushback processing of a printed circuit board from a printed wiring board is mainly described. However, the present invention can be applied to a mother board other than the printed wiring board, a product board other than the printed circuit board, and a processed board other than the mounting board.

1 to 4 show a mother board machining die according to the first embodiment of the present invention. The mother board machining mold 1 includes a lower mold 20 and an upper mold 50. Further, the lower mold 20 and the upper mold 50 are respectively provided on the pushback portion 3 for performing pushback processing of one or more printed circuit boards on the upstream side with respect to the conveyance direction of the printed wiring board, On the downstream side with respect to the transport direction, there is an outer shape cutting portion (outer shape cutting means) 5 for cutting an outer shape of the mounting substrate including one or more printed circuit boards that are pushed back.
Further, between the pushback portion 3 and the outer shape cutting portion 5, there is a blanking region 7 for blanking the printed wiring board in which the printed circuit board pushed back in the pushback unit 3 is fitted. Is provided.

As shown in FIGS. 1 and 2, the lower mold 20 includes a lower mold base plate 22 and lower mold strippers 24a and 24b. The lower mold base plate 22 includes a base portion 22a and a pushback punch portion (first pushback means) 22b. The base 22a has a stepped shape in which the height of the upper surface on the upstream side is low and the height of the upper surface on the downstream side is high, with the center being the boundary, and the pushback punch portion 22b is detachable from the stepped portion. Is attached. The pushback portion 3 of the pushback punch portion 22b is provided with first lower punches 22c and 22d for punching out the printed circuit board. Further, the outer shape cutting portion 5 of the base portion 22a is provided with a second lower punch 22e for cutting out the mounting substrate from the printed wiring board.
In FIG. 1, a total of two first lower punches 22c and 22d having the same shape are shown. However, this is merely an example, and the shape and number of the first lower punches may vary depending on the purpose. Can be arbitrarily selected.

The lower mold strippers 24a and 24b are divided into two parts with a substantially center as a boundary. The lower mold stripper 24a located on the upstream side is provided with a through hole at a position corresponding to the first lower punches 22c and 22d, and the lower mold stripper 24a moves up and down along the peripheral wall surface of the first lower punches 22c and 22d. It is possible. Similarly, the lower mold stripper 24b is provided with a through hole at a position corresponding to the second lower punch 22e, and the lower mold stripper 24b can move up and down along the peripheral wall surface of the second lower punch 22e.
Note that the lower mold strippers 24a and 24b are not necessarily divided into two parts, and may be integrated. However, when the lower mold stripper is divided into two, when the pushback punch portion 22b is replaced with a punch having a different shape and / or arrangement (second pushback means), only the lower mold stripper 24a needs to be replaced. Therefore, there is an advantage that the replacement work is facilitated and the mold cost can be reduced.

  The lower mold strippers 24 a and 24 b are restricted from moving upward by a plurality of bolts 26, 26... That are loosely inserted from below the base portion 22 a of the lower mold base plate 22. It is urged | biased by the upward direction by the elastic members 28, 28 ... inserted between the lower mold strippers 24a and 24b. The material of the elastic members 28, 28... Is not particularly limited, but urethane rubber is a preferred example. Further, posts 30a to 30d inserted from below the lower mold base plate 22 are erected on the left and right corners on the upstream side of the lower mold stripper 24a and the left and right corners on the downstream side of the lower mold stripper 24b. The posts 30a to 30d are used for positioning the lower mold 20 and the upper mold 50 during pressing.

Further, on the upper surfaces of the lower mold strippers 24a and 24b, between the first lower punches 22c and 22d and the second lower punch 22e, there is a length corresponding to the length in the transport direction of the mounting substrate ( In other words, a blanking region 7 having a size corresponding to one mounting substrate is provided. The pushback unit 3, the blanking region 7, and the outer shape cutting unit 5 are arranged at equal intervals so that the distance between these reference points is equal to the conveyance distance per time of the mother board.
Positioning pins 32a to 32c used for positioning in pushback processing are provided on the upper surface of the lower mold stripper 24a and in the vicinity of the first lower punches 22c and 22d. Positioning pins 32d to 32f are provided on the upper surface of the lower mold strippers 24a and 24b and in the blanking region 7 at positions corresponding to the positioning pins 32a to 32c. Further, on the upper surface of the lower mold stripper 24b and in the vicinity of the second lower punch 22e, positioning pins 32g to 32i used for positioning in the outer shape cutting process are provided at positions corresponding to the positioning pins 32a to 32c. It has been.

The first lower punches 22c, 22d have through-hole forming holes (first through-hole forming means) 34, 34,... For forming through holes (first through holes) such as component holes in the printed circuit board, respectively. Is provided.
On the upper surface of the second lower punch 22e, slit forming holes (slit forming means) 36, 36,... For forming one or more slits are provided in a blank portion around the mounting substrate. The “slit” refers to a notch that communicates with the outer periphery of the mounting board and does not communicate with the printed circuit board. Further, on the upper surface of the second lower punch 22e, reference hole forming holes 38a, 38a... For forming a reference hole when electronic components are automatically mounted and a sub reference hole for forming a sub reference hole are formed. Holes 38b, 38b... Are provided.
The reference hole is usually provided at a corner of the mounting substrate. In addition, when an unnecessary part of the substrate is cut by a cutting line forming means to be described later, the sub reference hole that is closest to the cutting line is used as a reference hole, and is used in combination with a sub reference hole that is farther than this. It is done. Therefore, when two or more sets of cutting line forming means to be described later are provided, it is preferable to provide a number of sub-reference holes corresponding thereto.

Further, the second lower punch 22e is provided with cutting line forming means.
Here, the “cutting line forming means” means that the pushback punch portion (first pushback means) 22b is wider than the mounting board (first processed board) obtained by the second lower punch 22e (the width of the mother board). One or more printed circuit boards (second product boards) are punched out from a narrow area (length perpendicular to the transport direction), and the punched printed circuit boards (second product boards) are fitted into the original holes. In order to obtain a mounting substrate (second processed plate) having a lateral width narrower than that of the mounting substrate (first processed plate) obtained by the second lower punch 22e in the case where it is replaced with an intended one (second pushback means). Means for discretely forming long holes and / or small holes on or near the cutting line.
“Near the cutting line” means a position that does not hinder the breakage of the substrate when the unnecessary portion of the mounting substrate is broken along the cutting line. The long hole and the small hole are most preferably formed so that the center thereof is directly above the cutting line, but when there is no hindrance to the breakage of the substrate and the cutting line does not require high dimensional accuracy, It means that it may be formed at a position slightly shifted left and right from the cutting line. The “cut line” is not necessarily a straight line, and may be curved or bent in the middle.

“Long hole” refers to a through hole having a ratio (L / d) of length (L) to width (d) of 2 or more. Specifically, as the shape of the long hole,
(1) Straight slot,
(2) A long hole curved along the longitudinal direction,
(3) A bent long hole in which a straight long hole is bent in the middle (for example, a long hole bent in a "<") shape,
(4) A long hole curved in a curve is connected to the end of a straight long hole,
and so on.
“Small hole” means a through hole having a ratio of length to width (L / d) of less than 2 (for example, round hole, square hole, triangular hole, hexagonal hole, major axis / minor axis ratio is less than 2) Oval hole etc.).
Further, “discrete” means that the long holes, small holes, or long holes and small holes formed on or near the cutting line are not completely connected.

The cutting line forming means is
(1) Discretely forming only small holes on or near the cutting line,
(2) Discretely forming only long holes on or near the cutting line,
(3) Those in which small holes and long holes are discretely formed on the cutting line or in the vicinity thereof at regular intervals or irregular intervals,
Either of them is acceptable.
Further, the cutting line forming means may form all the long holes and small holes formed on or near the cutting line, or may form only a part of them. In the case where the cutting line forming means forms part of the long hole and small hole, the remaining long hole and small hole are preliminarily processed before being pressed using the mother board working die according to the present invention. It may be formed on the mother board using NC machining, router machining, press working, or the like, or may be formed on or near the cutting line after the mounting substrate is cut out from the mother board.

In particular, the cutting line forming means communicates with one side of the region where the straight portion becomes the mounting substrate (first processed plate), and is substantially perpendicular to one side of the region where the straight portion becomes the mounting substrate. So that a long hole having a straight line portion (first long hole) is formed on one side of the region to be the mounting substrate or two opposite sides along the cutting line or in the vicinity thereof (first long hole formation) (Means) is preferable. When a long hole having a straight part is formed perpendicular to one side or two opposite sides of the area to be the mounting substrate, after the unnecessary part is broken along the cutting line, this straight part is the reference side for automatic mounting. As an advantage.
In addition, “almost vertical” means that the straight line portion is preferably completely perpendicular to one side of the substrate, but as long as it does not hinder the use of the straight line portion as a reference side in automatic mounting, It means that it may deviate from a right angle.

When the cutting line forming means includes the first long hole forming means, the cutting line forming means discretely forms one or more small holes on or in the vicinity of the cutting line passing through the tip of the first long hole. There may be further provided a small hole forming means.
In the case where the cutting line forming means includes the first long hole forming means, the cutting line forming means has one or more long holes (second long holes) on or near the cutting line passing through the tip of the first long hole. There may be further provided second elongated hole forming means for discretely forming holes). In this case, there may be further provided small hole forming means for forming a small hole on the cutting line or in the vicinity thereof, between the first long hole and the second long hole, or between the second long holes.
Further, when the cutting line forming means includes the first long hole forming means, it is preferable that the tip of the first long hole bends or bends toward the inside of the mounting substrate (second processed board) having a small width. . In the case where long holes or small holes are discretely formed on or near the cutting line, if an unnecessary portion of the substrate is broken along the cutting line, irregularities remain on the cutting line. In this case, if the cutting line is straight, this unevenness may interfere with the self-equipment when automatic mounting is performed based on the straight portion of the first slot. On the other hand, when the tip of the first elongated hole is bent or bent inward, there is an advantage that the unevenness on the cutting line can be prevented from interfering with the self-feeding machine.

In the present embodiment, the cutting line forming means includes first elongated hole forming holes (first elongated hole forming means) 40 and 40 formed on two opposing sides of the second lower punch 22e, and second elongated hole forming. It consists of a hole (second elongated hole forming means) 42 and small hole forming holes (small hole forming means) 44, 44. Each of the first long hole forming holes 40, 40 has a straight portion, the straight portion communicates with one side of the second lower punch 22e, and the straight portion is substantially perpendicular to one side of the second lower punch 22e. It is formed to become. Moreover, the front-end | tips of the 1st long hole formation holes 40 and 40 are each bent in the left direction of FIG.
The second long hole forming hole 42 has a linear shape, and is formed on a straight line connecting the tips of the first long hole forming holes 40, 40. The small hole forming holes 44, 44 are respectively It is formed between the first long hole forming hole 40 and the second long hole forming hole 42.

In FIG. 1, a total of one second long hole forming hole 42 and a total of two small hole forming holes 44, 44 are shown, but this is merely an example, and the second long hole forming hole is formed. The number of the holes 42 and the small hole forming holes 44 and the distance between them can be arbitrarily selected as long as there is no hindrance to breakage of unnecessary portions of the substrate and the mold strength can be maintained.
Further, in FIG. 1, a set of cutting line forming means is provided, but this is also merely an example, and this type of cutting line is used so that the cutting line is parallel to the conveying direction of the mother board. Two or more sets of forming means may be provided.

The upper mold | type 50 is provided with the upper mold | type base board 52 and the four holders 54a-54d as shown in FIG.3 and FIG.4. Each of the holders 54a to 54d is divided into two on the upstream side and the downstream side with respect to the conveying direction of the mother board, and only the upstream side (pushback means 3 side) holder can be replaced independently. Yes.
The upper mold base plate 52 and the holders 54a to 54d are stacked on the basis of knock pins 56, 56 erected on the upper mold base plate 52, and fastened by a plurality of fastening bolts 58, 58. Further, the pushback portion 3 and the outer shape cutting portion 5 of the holder 54d located at the forefront of the upper die 50 are respectively provided with first upper die strippers 60a and 60b and a mounting substrate for punching out the printed circuit board. A second upper mold stripper 60c for cutting out is attached. The first upper mold strippers 60a and 60b and the second upper mold stripper 60c are provided at positions corresponding to the first lower punches 22c and 22d and the second lower punch 22e provided in the lower mold, respectively.

  The first upper mold strippers 60a and 60b are loosely inserted into the first slide spaces 62a and 62b provided in the upstream holder 54d. Further, the first upper mold strippers 60a and 60b are supported by bolts 64, 64... Which are loosely inserted from above the holder 54c so that their tips slightly protrude from the surface of the holder 54d, and are downwardly moved. Movement is restricted. Further, the bolts 64, 64... Can move up and down along a through hole 65 provided in the holder 54b.

The first pressing pins 66a, 66a,... Are for pressing the first upper mold strippers 60a, 60b downward, and are loosely inserted into through holes penetrating the holders 54b, 54c in the vertical direction. One end thereof is in contact with the upper surfaces of the first upper mold strippers 60a and 60b, and the other end is in contact with the lower surface of the first pressing plate 70a disposed in the central space 68a of the upstream holder 54a.
The first pressing plate 70a is for pressing the first pressing pins 66a, 66a,. .. Are inserted between the upper surface of the first pressing plate 70a and the cap bolt 72, and the first pressing plate 70a is urged downward by the elastic members 74, 74 .... ing. The material of the elastic members 74, 74... Is not particularly limited, but urethane rubber is a preferred example.

Similarly, the second upper mold stripper 60c is loosely inserted into the second slide space 62c provided in the downstream holder 54d. Further, the second upper mold stripper 60c is supported by bolts 64, 64... That are loosely inserted from above the holder 54c so that its tip slightly protrudes from the surface of the holder 54d, and the downward movement is restricted. ing.
The second pressing pins 66b, 66b,... Are for pressing the second upper mold stripper 60c downward, and are loosely inserted into through holes penetrating the holders 54b, 54c in the vertical direction. One end is in contact with the upper surface of the second upper mold stripper 60c, and the other end is in contact with the lower surface of the second pressing plate 70b disposed in the central space 68b of the holder 54a. The second pressing plate 70b is for pressing the second pressing pins 66b, 66b,. On the upper surface of the second pressing plate 70b, knockout bushes 76, 76... For pressing the second pressing plate 70b downward are provided. The lengths of the knockout bushes 76 and 76 are determined so that the tip ends slightly protrude from the upper surface of the upper mold base plate 52 in an unloaded state.

  The holder 54d is provided with post guide holes 78a to 78d at positions corresponding to the posts 30a to 30d erected on the lower mold 20, respectively. Further, positioning pin guide holes 80a to 80i are provided on the lower surface of the holder 54d at positions corresponding to the positioning pins 32a to 32i erected on the lower mold 20, respectively.

Through-hole forming holes 34, 34 ... formed on the upper surface of the first lower punch 22c, 22d, slit forming holes 36, 36 ... formed on the upper surface of the second lower punch 22e, reference hole forming holes 38a, 38a ..., and the positions corresponding to the sub-reference hole forming holes 38b, 38b ..., through-hole forming pins (first through-hole forming means) 82, 82 ..., slit forming pins (slit forming means) 84, 84 ..., respectively. , Reference hole forming pins 86a, 86a, and sub reference hole forming pins 86b, 86b,.
Further, the first long hole forming holes 40, 40, the second long hole forming hole 42, and the small hole forming holes 44, 44 formed on the upper surface of the second lower punch 22e are respectively positioned at the first long holes. Hole forming pins (first elongated hole forming means) 88, 88, second elongated hole forming pins (second elongated hole forming means) 90, and small hole forming pins (small hole forming means) 92, 92 are provided. All of these forming pins are detachable from the upper mold 50.
These tips are loosely inserted into through holes provided in the first upper mold stripper 60a, 60b or the second upper mold stripper 60c, respectively, and the first upper mold stripper 60a, 60b or the second upper mold stripper As 60c moves upward along the second slide spaces 62a to 62c, it projects from the lower surface of the first upper mold stripper 60a, 60b or the second upper mold stripper 60c.

  Further, on the lower surface of the holder 54d, between the first upper mold strippers 60a and 60b for pushing back the printed circuit board and the second upper mold stripper 60c for cutting the outer shape of the mounting board. Is provided with a blanking region 7 corresponding to one mounting substrate.

  The number, shape and position of the slit forming pins 84, 84... And the corresponding slit forming holes 36, 36... (Slit forming means) provided in the second upper mold stripper 60c, that is, the margins around the mounting substrate. The number, shape, and position of the slits formed on the substrate are preferably selected so that the warp generated on the mounting substrate is minimized when the mounting substrate is cut out from the printed wiring board.

For example, when the warpage generated on the mounting substrate is relatively small, it is only necessary to form a slit on at least one side of the mounting substrate. In addition, when the warpage generated on the mounting substrate is relatively large, it is preferable to form slits on at least two opposing sides of the mounting substrate. Further, when the generated warp is large, such as when the area of the mounting substrate is large, it is preferable to provide slits on all four sides of the mounting substrate.
Further, when printed circuit boards are punched in multiple rows, or when printed circuit boards having different shapes are irregularly arranged, one or more slits are formed around the mounting board. In addition to the formation, it is preferable to form one or more elongated holes for stress relaxation in the blank portion at the center of the mounting substrate.

  In general, as the length of the slit and / or the elongated hole for stress relaxation becomes longer, the effect of reducing the warp generated on the mounting substrate becomes larger. For example, when a slit is formed in a blank portion on the outer periphery of the mounting substrate, the length of the slit is preferably 2/3 or more of the length of the blank portion. However, if the slit is too long, the strength of the mounting substrate is reduced. Accordingly, it is preferable to select an optimum length of the slit according to the shape, arrangement, etc. of the printed circuit board so that the strength enough to withstand automatic mounting is maintained.

  The lengths of the slits or the long holes for stress relaxation may all be the same or different. For example, when the lengths of the blank portions where slits or elongated holes for stress relaxation are approximately equal, the lengths of the slits or elongated holes for stress relaxation are the same. Also good. On the other hand, when the lengths of the margin portions differ depending on the location, these lengths may be changed according to the positions where these are formed. The number of slits and the like provided on the mounting substrate is the same, and it is preferable to determine the number of warpages and the strength of the mounting substrate.

When forming a through hole in the printed circuit board, the through hole forming hole can be provided in the second lower punch 22e (outside cutting means 5 side), but the first lower punch 22c, 22d (first It is preferably provided on the pushback means side. This is because when the through hole forming hole is provided on the second lower punch 22e side, the pushback punch portion (first pushback means) 22b is replaced with one having a different punch shape and / or arrangement (second pushback means). This is because the through hole may not always be formed at the target position.
On the other hand, the slit forming hole, the reference hole forming hole, and the sub reference hole forming hole can be provided in the lower mold strippers 24a and 24b (the pushback means 3 side or the blanking region 7 side), but the second lower punch 22e ( It is preferably provided on the outer cutting means 5 side. This is because the structure of the mold is simplified if these formation holes are provided in the lower mold strippers 24a and 24b.

  In the example shown in FIG. 1, the cutting line forming means is for discretely forming long holes and / or small holes, but the cutting line forming means forms a continuous cutting line. It is also possible to be a thing (that is, a long hole and a small hole completely connected). However, in this case, since the second upper mold stripper 60c is completely divided into two parts, it is necessary to individually support them on the upper mold 50, and the mold structure becomes complicated. Further, since the second lower punch 22e is also completely divided into two, the mold strength is insufficient. Therefore, it is preferable that the cutting line forming means form long holes and / or small holes discretely.

Further, when all the electronic components are automatically mounted on the mounting substrate at one time, it is sufficient to have one reference hole and one sub reference hole. However, the self-equipment machine generally has a region (red zone) where electronic components cannot be mounted at a portion at a certain distance from the reference hole. Further, the mounting substrate is not necessarily pressed with the front side facing up, and may be pressed with the back side facing up. Furthermore, the printed circuit board may be mounted on only one side or on both sides. In order to cope with all of these, it is preferable to provide a plurality of reference holes and a plurality of sub-reference holes used in combination therewith. If a plurality of reference holes and sub-reference holes are provided, electronic components can be automatically mounted multiple times from the same direction, automatically mounted from the opposite direction, or automatically mounted by turning the board over. Make it easier.
Specifically, as illustrated in FIG. 1, it is preferable to provide reference holes at the four corners of the mounting substrate, and to provide one or more sub-reference holes at a predetermined interval from the reference holes. At this time, if the first elongated hole is formed so that the straight line portion is substantially perpendicular to one side of the mounting substrate, the straight line portion is automatically mounted after the unnecessary portion is broken along the cutting line. It can be used as a reference side. If a plurality of sub-reference holes are formed, the sub-reference hole closest to the cutting line is used as the reference hole, and the sub-reference holes located farther than this are used for automatic mounting. Can do.

  Furthermore, in the mother board processing mold 1 shown in FIGS. 1 to 4, a blanking region 7 corresponding to one mounting substrate is provided, but a blanking region corresponding to two or more mounting substrates is provided. It may be provided. However, if an unnecessary blanking area is provided more than necessary, the die will only be enlarged and there will be no real benefit.

Next, the usage method of the metal mold | die 1 for mother board processing which concerns on this Embodiment is demonstrated. 5 and 6 show process drawings of the press working. First, as shown in FIG. 5A, the printed wiring board 10 is placed on the upper surface of the lower mold 20.
This printed wiring board 10 includes printed circuit boards (B) 14y and 14y subjected to pushback processing in the immediately preceding press, and printed circuit board (A) 14x subjected to pushback processing in the previous press. 14x are fitted in the original holes of the printed wiring board.

  The printed wiring mother board 10 is conveyed rightward in FIG. 5A after the last press is completed, and the blanking is performed in the part where the pushback processing was performed in the last pressing process and the blanking region 7. The broken parts are placed on the upper surface of the lower mold 20 so as to come on the blanking region 7 and the outer cutting part 5, respectively. The printed wiring board 10 is positioned by inserting positioning pins 32 a to 32 i provided on the upper surface of the lower mold 20 into pushback reference holes provided on the printed wiring board 10.

  When the upper die 50 is lowered from this state, first, the tips of the first upper die strippers 60a and 60b and the second upper die stripper 60c come into contact with the upper surface of the printed wiring mother board 10, and the first upper die strippers 60a and 60b. The second upper mold stripper 60c moves upward along the first slide spaces 62a and 62b and the second slide space 62c, respectively.

When the upper die 50 is further lowered, as shown in FIG. 5B, the first lower punches 22c and 22d push the first upper die strippers 60a and 60b upward on the pushback portion 3 side, thereby Punched printed circuit boards (C) 14z and 14z. At this time, the holder 54d pushes down the printed wiring board 10 and the lower mold strippers 24a and 24b after the printed circuit boards 14z and 14z are punched against the elastic force of the elastic member 28.
At the same time, the tips of the through hole forming pins 82, 82,... Protrude from the lower surfaces of the first upper mold strippers 60a, 60b to form through holes in the printed circuit boards (C) 14z, 14z.

On the other hand, on the outer cutting part 5 side, the second lower punch 22e pushes up the second upper mold stripper 60c, whereby the mounting substrate 18 is punched out. Further, as the second upper mold stripper 60c is pushed upward, the slit forming pins 84, 84..., The reference hole forming pin 86a, the sub reference hole forming pin 86b, the first length are formed from the lower surface of the second upper mold stripper 60c. The tips of the hole forming pins 88, 88..., The second long hole forming pin 90, and the small hole forming pins 92, 92... Protrude to the mounting substrate 18, respectively. A hole, a second elongated hole, and a small hole are formed.
Further, on the blanking region 7 side, the printed wiring board 10 is pressed between the lower surface of the holder 54a and the upper surfaces of the lower mold strippers 24a and 24b.

  Next, when the upper die 50 is raised after punching is completed, as shown in FIG. 6A, the elastic members 28, 28... Are printed together with the lower die strippers 24a, 24b by the restoring force. The plate 10 is pushed upward. At this time, on the pushback portion 3 side, the first pressing plate 70a biased by the elastic members 74, 74... Pushes the first upper mold strippers 60a, 60b downward via the first pressing pins 66a. Therefore, when the upper die 50 is completely detached from the lower die 20, as shown in FIG. 6A, the newly punched printed circuit boards (C) 14 z and 14 z are the original parts of the printed wiring board 10. It will be in the state where it was inserted in the hole.

  On the other hand, the downward biasing force does not act on the second upper mold stripper 60c on the outer cutting section 5 side. Therefore, as shown in FIG. 6A, even if the upper mold 50 is detached from the lower mold, the second upper mold stripper 60c does not descend, and the punched mounting board 18 is in the second slide space 62c. Once held. At this time, the knockout bushes 76, 76... Protrude from above the upper mold base plate 52.

  When the upper die 50 is further raised and the upper die 50 approaches the vicinity of the top dead center, the pressing means (not shown) provided in the press machine eventually presses the knockout bushes 76, 76. The second pressing plate 70b pushes down the second upper mold stripper 60c via the second pressing pin 66b. Therefore, when the upper die 50 reaches the top dead center, as shown in FIG. 6B, the second upper die stripper 60c is pushed down to the original position, and at the same time, the mounting substrate 18 is moved to the second slide. The space 62c is pushed out.

  Thereafter, the newly punched printed circuit boards (C) 14z and 14z and the blank printed circuit boards (B) 14y and 14y are located directly below the blanking area 7 and the outer cutting part 5, respectively. Then, the printed wiring board 10 is conveyed rightward. Then, following the same procedure as described above, the next printed circuit board is pushed back, the printed circuit board (C) 14z punched by the immediately preceding press 14z, 14z is punched, and the previous press is punched twice. Further, the outer shape cutting process of the mounting board including the printed circuit boards (B) 14y and 14y is repeated as many times as necessary.

  FIG. 7 shows a plan view of a pressed mother board and a plan view of a mounting substrate cut out from the mother board. When manufacturing a mounting substrate (first processed plate) having the same dimensions as the second lower punch 22e, the first long hole forming pins 88, 88, the second long hole forming pins 90, and the small holes are formed in advance from the upper die 50. The pins 92 and 92 are removed. Further, pushback reference holes 10a, 10a... Are formed in the mother board 10 in advance.

Pushback processing of the mother board 10 using the mother board machining die 1 is performed according to the following procedure.
First, the positioning pins 32a to 32c are inserted into the pushback reference holes 10a, 10a... Formed in the mother board 10, and the pushback portion 3 performs pushback of the printed circuit boards (A) 14x and 14x (pushback). Process).
Next, the mother board 10 is conveyed so that the printed circuit boards (A) 14x and 14x are on the blanking region 7, and the positioning pins 32d to 32f are inserted into the pushback reference holes 10a, 10a. 3, the printed circuit boards (B) 14 y and 14 y are newly pushed back, and at the same time, the printed circuit boards (A) 14 x and 14 x are pressed in the blanking area 7 (blank printing process).
Furthermore, the printed circuit boards (A) 14x and 14x and the printed circuit boards (B) 14y and 14y convey the mother board 10 so that the printed circuit boards (B) 14y and 14y are on the outer cutting section 5 and the blanking area 7, respectively. Positioning pins 32g to 32i are inserted into 10a, 10a... And the printed circuit boards (C) 14z and 14z are newly pushed back in the pushback portion 3, and the printed circuit board (B) 14y is formed in the blanking region 7. At the same time, the mounting substrate 18 including the printed circuit boards (A) 14x and 14x is cut out at the outer shape cutting part 5.
The cut mounting board 18 is then sent to an automatic mounting process, and electronic components are automatically mounted on the printed circuit boards 14x and 14x. After completion of the automatic mounting, the frame portion of the mounting board 18 is broken to separate the printed circuit boards 14x and 14x.

  On the other hand, when a mounting substrate (second processed plate) having a narrower width than the second lower punch 22e is manufactured, the first long hole forming pins 88, 88, the second long hole forming pins 90, and the small holes are formed in the upper die 50. The forming pins 92 and 92 are attached. Further, the pushback punch portion 22b and the lower mold stripper 24a (first pushback means) are used to push back the printed circuit board (second product board) from a region having a narrower width than the second lower punch 22e. Replace with (second pushback means). In response to this, the pushback portion 3 of the upper mold 50 is also replaced.

In FIG. 8, the pushback punch part 22b and the lower mold stripper 24a are replaced with the lower mold 20 'of the mother board processing mold 1' replaced with the pushback punch part 22b 'and the lower mold stripper 24a', respectively. A plan view is shown. In FIG. 8, the pushback punch portion 22b ′ includes first lower punches 22c ′ and 22d ′ for performing pushback of the printed circuit board from a region having a narrower width than the second lower punch 22e. Further, through hole forming holes 34 ′, 34 ′,... For forming through holes are provided on the upper surfaces of the first lower punches 22 ′, 22d ′. That is, the pushback punch portion 22b ′ is different from the pushback punch portion 22b before replacement in the shape and position of the first lower punch and the position of the through hole forming hole.
The other features of the pushback punch portion 22b ′ and the lower mold stripper 24a ′ are the same as those of the pushback punch portion 22b and the lower mold stripper 24a, and thus the description thereof is omitted. Moreover, the code | symbol attached | subjected to the other part in FIG. 8 used the code | symbol same as the metal mold | die 1 for mother board processing shown to FIGS.

Pushback processing of the mother board 10 ′ using the mother board machining die 1 ′ shown in FIG. 8 is performed according to the following procedure. In this case, it is not necessary to use the base plate 10 'having a width wider than that of the second lower punch 22e, and use a board having an optimum width according to the width of the region where pushback is performed. Can do.
First, as shown in FIG. 9, the positioning pins 32a and 32b are inserted into the pushback reference holes 10a ′, 10a ′... Formed in the mother board 10 ′, and the printed circuit board (A) 14x is inserted into the pushback portion 3. ', 14x' pushback is performed (pushback process).
Next, the mother board 10 ′ is conveyed so that the printed circuit boards (A) 14x ′ and 14x ′ are on the blanking region 7, and the positioning pins 32d and 32e are inserted into the pushback reference holes 10a ′, 10a ′,. In the pushback unit 3, the printed circuit boards (B) 14y ′ and 14y ′ are newly pushed back, and at the same time, the printed circuit boards (A) 14x ′ and 14x ′ are pressed in the blanking region 7 (empty Punching process).
Next, the printed circuit boards (A) 14x ′ and 14x ′ and the printed circuit boards (B) 14y ′ and 14y ′ are transferred to the mother board 10 ′ so that they are on the outer cutting portion 5 and the blanking region 7, respectively. Then, the positioning pins 32g and 32h are inserted into the pushback reference holes 10a ′, 10a ′... And the printed circuit boards (C) 14z ′ and 14z ′ are newly pushed back at the pushback portion 3, and the blanking is performed. At the same time as pressing the printed circuit boards (B) 14 y ′ and 14 y ′ in the region 7, the outer cutting section 5 cuts out the mounting board 18 ′ including the printed circuit boards (A) 14 x ′ and 14 x ′. At the same time, the first long hole 19a, the second long hole 19b, and the small hole 19c are formed in the outer shape cutting part 5 along the cutting line of the mounting substrate 18 ′.
Further, when the unnecessary portion 18a is broken along the cutting line of the mounting substrate 18 ′ that is knocked out from the upper mold and connected to the unnecessary portion 18a, the mounting substrate whose width is narrower than that of the second lower punch 22e. 18 'is obtained.
The obtained mounting board 18 ′ is then sent to an automatic mounting process, and electronic components are automatically mounted on the printed circuit boards 14x ′ and 14x ′. After completion of the automatic mounting, the frame portion of the mounting board 18 ′ is broken to separate the printed circuit boards 14x ′ and 14x ′.

In the mother board processing mold 1 (1 ′) according to the present embodiment, the pushback punch portion 22b, the lower mold stripper 24a, and the upper mold 50 corresponding thereto can be replaced, and Since the cutting line forming means is detachably provided in the outer cutting part 5, a plurality of types of mounting boards having different widths can be manufactured with one mold. In addition, since it is not necessary to remake the entire mold every time a mounting substrate having a different width is produced, the mold cost can be reduced.
Further, when the blanking region 7 is provided between the pushback portion 3 and the outer shape cutting portion 5, the area of the holder 54d into which the second upper mold stripper 22e is loosely inserted is increased, and a slide space is formed from the outer periphery of the divided holder 54d. The width up to the inner periphery of can be made sufficiently thick. Therefore, the interval between the mounting substrates 18 cut out from the mother board 10 can be reduced to the ultimate without reducing the mold life.

  Also, a first elongated hole having a straight portion is formed on or near the cutting line, the leading end of the straight portion communicates with one side of the region to be the mounting substrate, and the straight portion is the mounting substrate. If it is formed so as to be substantially perpendicular to one side of the region, the straight portion can be used as a reference side for automatic mounting after an unnecessary portion is broken along the cutting line. Furthermore, if a small hole, a second long hole, or a small hole + second long hole is formed on or near the cutting line passing through the tip of the first long hole, breakage of unnecessary portions is facilitated. Furthermore, if the tip of the first elongated hole is bent or curved toward the inside of the mounting substrate, the unevenness remaining on the cutting line when the unnecessary part is broken may interfere with the self-inserting machine during automatic mounting. There is no. Therefore, automatic mounting from two directions is facilitated, and high-density mounting is facilitated.

  Further, since the pushback process is generally performed by pushing up the lower punch from below while holding the periphery of the mother board with the upper die, a strong shearing stress acts on the mother board during the pushback process. As a result, when only the pushback process is performed continuously, an upward convex spherical warp is generated in the mother board when the pushback process is completed. If this warpage becomes significant, positioning becomes difficult during the outer shape cutting process.

  On the other hand, according to the mother board machining die 1 according to the present embodiment, the outer shape of the portion where the push-back process of the printed circuit board is performed by one press and the push-back process is performed by the previous press. Since the cutting process is performed, the internal stress generated during the pushback process is immediately relieved, and the warp generated in the subsequent printed wiring board is reduced. In particular, the mounting substrate cut out from the mother board is temporarily held by the upper die as the outer shape cutting means, and after the upper die is detached from the mother plate, the knockout means for pushing out the mounting substrate from the upper die is used. In some cases. Therefore, the outer shape can be easily cut as compared with the case where the pushback processing and the outer shape cutting are performed using separate molds.

Further, in order to simultaneously perform the push-back processing and the outer shape cutting process by the knockout method by one press, the first upper mold stripper 60a, 60b for push back, and the second upper mold stripper 60c for outer shape cutting, Need to perform individual actions. In the present embodiment, the pressing plate for pressing the upper mold stripper is divided into the first pressing plate 70a and the second pressing plate 70b, so that such an operation can be performed very easily. it can.
Furthermore, the mother board processing mold 1 according to the present embodiment includes a slit forming means for forming one or more slits in the blank portion of the mounting substrate when cutting the outer shape. The internal stress introduced into the mounting board is also relieved. Therefore, the warp generated on the mounting substrate can be reduced to a level that does not hinder subsequent processes.

Next, a mother board machining die according to a second embodiment of the present invention will be described.
FIG. 10A and FIG. 10B are plan views of the base plate processing molds 2 and 2 ′ and the lower molds 20 and 20 ′ according to the present embodiment. The mother board processing mold 2 according to the present embodiment includes only the pushback portion 3 and the outer shape cutting portion 5, except that no blanking region is provided between the pushback portion 3 and the outer shape cutting portion 5. The configuration is the same as that of the first embodiment. When there is no blanking area, it is necessary to make the distance between the pushback portion 3 and the outer shape cutting portion 5 relatively long in order to ensure the strength of the mold. As a result, the interval between the mounting substrates is widened and the material yield is reduced, but there is an advantage that the mold can be miniaturized.

In FIG. 10A, the mother board machining die 2 includes a pushback punch portion 22b and a lower die stripper 24a. The pushback punch portion 22b includes first lower punches 22c and 22d, and through holes forming holes 34, 34,... For forming through holes are provided on the upper surfaces of the first lower punches 22c and 22d. .
Further, in FIG. 10B, the pushback punch portion 22b and the lower mold stripper 24a are replaced with the pushback punch portion 22b ′ and the lower mold stripper 24 ′, respectively. The top view of lower mold | type 20 'is shown. In FIG. 10B, the pushback punch portion 22b ′ includes first lower punches 22c ′ and 22d ′ for performing pushback of the printed circuit board from a region having a narrower width than the second lower punch 22e. . Further, through hole forming holes 34 ′, 34 ′,... For forming through holes are provided on the upper surfaces of the first lower punches 22 ′, 22d ′. That is, the pushback punch portion 22b ′ is different from the pushback punch portion 22b before replacement in the shape and position of the first lower punch and the position of the through hole forming hole.
Since the other points of the pushback punch portion 22b (22b ′) and the lower mold stripper 24a (24a ′) are the same as those in the first embodiment, description thereof will be omitted. Moreover, the code | symbol attached | subjected to the other part in FIG. 10 used the code | symbol same as the metal mold | die 1 for mother board processing shown to FIGS.

When manufacturing a mounting substrate (first processing plate) having the same dimensions as the second lower punch 22e using the base plate processing mold 2 shown in FIG. Follow the procedure below. In this case, the first long hole forming pin, the second long hole forming pin, and the small hole forming pin are previously removed from the upper mold (not shown).
First, as shown in FIG. 11, the positioning pins 32a to 32c are inserted into the pushback reference holes 10a, 10a... Formed in the mother board 10, and the printed circuit boards (A) 14x, 14x Pushback is performed (pushback process).
Next, the mother board 10 is transported so that the printed circuit boards (A) 14x and 14x are on the outer cutting section 5, and the positioning pins 32g to 32i are inserted into the pushback reference holes 10a, 10a. 3, the printed circuit boards (B) 14 y and 14 y are newly pushed back, and at the same time, the mounting board 18 including the printed circuit boards (A) 14 x and 14 x is cut out by the outer shape cutting unit 5.
The cut mounting board 18 is then sent to an automatic mounting process, and electronic components are automatically mounted on the printed circuit boards 14x and 14x. After completion of the automatic mounting, the frame portion of the mounting board 18 is broken to separate the printed circuit boards 14x and 14x.

  On the other hand, when manufacturing a mounting substrate (second processed plate) having a narrower width than the second lower punch 22e, a first long hole forming pin, a second long hole forming pin, and a small hole are formed in an upper die (not shown). At the same time when the forming pin is attached, as shown in FIG. 10B, the pushback punch portion 22b and the lower mold stripper 24a (first pushback means) are replaced with the pushback punch portion 22b ′ and the lower mold stripper 24a ′. Replace with (second pushback means). In response to this, the upper pushback portion 3 is also replaced.

Pushback processing of the mother board 10 ′ using the mother board machining die 2 ′ shown in FIG. 10B is performed according to the following procedure. In this case, it is not necessary to use the base plate 10 'having a width wider than that of the second lower punch 22e, and use a board having an optimum width according to the width of the region where pushback is performed. Can do.
First, as shown in FIG. 12, the positioning pins 32a and 32b are inserted into the pushback reference holes 10a ′, 10a ′... Formed in the mother board 10 ′, and the printed circuit board (A) 14x is inserted into the pushback portion 3. ', 14x' pushback is performed (pushback process).
Next, the mother board 10 ′ is conveyed so that the printed circuit boards (A) 14x ′ and 14x ′ are on the outer cutting section 5, and the positioning pins 32g and 32h are inserted into the pushback reference holes 10a ′, 10a ′,. In the pushback unit 3, the printed circuit boards (B) 14y ′ and 14y ′ are newly pushed back, and at the same time, the external cutting unit 5 includes the printed circuit boards (A) 14x ′ and 14x ′. The substrate 18 ′ is cut out. At the same time, the first long hole 19a, the second long hole 19b, and the small hole 19c are formed in the outer shape cutting part 5 along the cutting line of the mounting substrate 18 ′.
Further, when the unnecessary portion 18a is broken along the cutting line of the mounting substrate 18 ′ that is knocked out from the upper mold and connected to the unnecessary portion 18a, the mounting substrate whose width is narrower than that of the second lower punch 22e. 18 'is obtained.
The obtained mounting board 18 ′ is then sent to an automatic mounting process, and electronic components are automatically mounted on the printed circuit boards 14x ′ and 14x ′. After completion of the automatic mounting, the frame portion of the mounting board 18 ′ is broken to separate the printed circuit boards 14x ′ and 14x ′.

  In the mother board processing mold 2 (2 ′) according to the present embodiment, the pushback punch portion 22b, the lower mold stripper 24a, and the corresponding upper mold 50 can be exchanged, and Since the cutting line forming means is detachably provided in the outer cutting part 5, a plurality of types of mounting boards having different widths can be manufactured with one mold. In addition, since it is not necessary to remake the entire mold every time a mounting substrate having a different width is produced, the mold cost can be reduced.

  Also, a first elongated hole having a straight portion is formed on or near the cutting line, the leading end of the straight portion communicates with one side of the region to be the mounting substrate, and the straight portion is the mounting substrate. If it is formed so as to be substantially perpendicular to one side of the region, the straight portion can be used as a reference side for automatic mounting after an unnecessary portion is broken along the cutting line. Furthermore, if a small hole, a second long hole, or a small hole + second long hole is formed on or near the cutting line passing through the tip of the first long hole, breakage of unnecessary portions is facilitated. Furthermore, if the tip of the first elongated hole is bent or curved toward the inside of the mounting substrate, the unevenness remaining on the cutting line when the unnecessary part is broken may interfere with the self-inserting machine during automatic mounting. There is no. Therefore, automatic mounting from two directions is facilitated, and high-density mounting is facilitated.

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the present invention.

  A mold for processing a mother board and a method for manufacturing a processed board according to the present invention use a mold for manufacturing a mounting board in which a push-back printed circuit board is temporarily fixed to a frame portion, and the same. It can be used as a method for manufacturing a mounting substrate. Moreover, the manufacturing method of the product board which concerns on this invention can be used as a method of manufacturing a printed circuit board from the board | substrate for mounting.

It is a top view of the lower mold | type of the metal mold | die for mother board processing which concerns on the 1st Embodiment of this invention. 2A and 2B are a cross-sectional view taken along line A-A ′ and a cross-sectional view taken along line B-B ′ of the lower mold shown in FIG. 1, respectively. It is a bottom view of the upper mold | type of the metal mold | die for mother board processing which concerns on the 1st Embodiment of this invention. FIGS. 4A and 4B are a cross-sectional view taken along line A-A ′ and a cross-sectional line B-B ′ of the upper mold shown in FIG. 3, respectively. It is process drawing which shows the manufacturing method of the mounting board | substrate using the metal mold | die for mother board processing shown in FIGS. FIG. 6 is a continuation of the process diagram shown in FIG. 5. It is the top view of the mother board processed using the metal mold | die for mother board processing shown in FIGS. 1-4, and the top view of the board | substrate for mounting. FIG. 5 is a plan view of a lower mold in which a pushback punch portion and a lower mold stripper are replaced in the mother board machining mold shown in FIGS. It is a top view of the mother board processed using the metal mold for mother board processing shown in Drawing 8, and a top view of a substrate for mounting. FIG. 10 (a) is a plan view of the lower die of the mother board machining die according to the second embodiment of the present invention, and FIG. 10 (b) is a mother board machining shown in FIG. 10 (a). FIG. 5 is a plan view of a lower die in which a pushback punch portion and a lower die stripper are replaced in the die for use. It is a top view of the mother board processed using the metal mold for mother board processing shown in Drawing 10 (a), and a top view of a substrate for mounting. It is a top view of the mother board processed using the metal mold for mother board processing shown in Drawing 10 (b), and a top view of a substrate for mounting.

Explanation of symbols

1 Mold for processing base plate 3 Pushback part 5 Outline cutting part (outline cutting means)
7 Blanking area 20 Lower die 22b Punch portion for pushback (first pushback means)
24a Lower mold stripper (first pushback means)
24b Lower mold stripper 40 1st slot formation hole (1st slot formation means)
42 2nd slot formation hole (2nd slot formation means)
44 Small hole forming hole (small hole forming means)
50 Upper mold 88 First elongated hole forming pin (first elongated hole forming means)
90 Second long hole forming pin (second long hole forming means)
92 Small hole forming pin (small hole forming means)

Claims (14)

A first pushback which is arranged upstream with respect to the conveying direction of the mother board, for punching out one or more first product boards from the mother board and fitting the punched first product boards into the original holes. Means,
An outer shape cutting means for cutting out the first processed plate including one or more of the first product plates, which is disposed downstream of the conveying direction of the mother plate and pushed back, from the mother plate; In the mold for mother board processing,
The first pushback means punches one or more second product plates having a shape and / or arrangement different from the first product plate from the mother plate, and the punched second product plate It can be replaced with the second pushback means that fits into the original hole,
When the first pushback means is replaced with the second pushback means for pushing back the second product plate from a region narrower than the lateral width of the first processed plate, Cutting line forming means for discretely forming long holes and / or small holes on or near the cutting line for obtaining a second processed plate having a narrower width than the processed plate;
The cutting line forming means is a mold for processing a mother board which is detachable from the outer shape cutting means. A blanking region having a length corresponding to the length in the conveying direction of the first processed plate is further provided between the first pushback unit and the outer shape cutting unit,
The pushback means, the blanking region, and the outer shape cutting means are arranged at equal intervals so that the distance between these reference points is equal to the transport distance per time of the mother board. 2. A mold for processing a mother board according to 1.   The cutting line forming means communicates with one side of a region where the straight line portion becomes the first processed plate, and is substantially perpendicular to one side of the region where the straight line portion becomes the first processed plate. As described above, first elongated hole forming means for forming the first elongated hole having the linear portion on one side of the region to be the first processed plate or on two opposite sides along the cutting line or in the vicinity thereof. The mother board processing metal mold according to claim 1 or 2 provided.   The said cutting line formation means is further equipped with the small hole formation means for forming the 1 or 2 or more small hole on the said cutting line which passes along the front-end | tip of the said 1st long hole, or its vicinity. Mold for processing the mother board. The cutting line forming means includes
On the cutting line, the starting edge of the straight line portion communicates with one side of the region to be the first processed plate, and the straight line portion is substantially perpendicular to one side of the region to be the first processed plate. Along the vicinity thereof, first elongated hole forming means for forming a first elongated hole having the straight portion on one side or two opposite sides of the first processed plate;
3. A second elongated hole forming means for discretely forming one or more second elongated holes on or near the cutting line passing through the tip of the first elongated hole. Mold for processing a mother board as described in 1. The cutting line forming means is a small hole that forms the small hole on the cutting line or in the vicinity thereof, between the first long hole and the second long hole, and / or between the second long hole. 6. The mother board machining die according to claim 5, further comprising a forming means.   The mold for processing a mother board according to any one of claims 3 to 6, wherein a tip of the first long hole is curved or bent toward the inside of the second processed board.   The said external shape cutting means is further equipped with the slit formation means for forming the 1 or 2 or more slit in the margin part around the said 1st processed board or the said 2nd processed board. Mold for processing a mother board according to crab. The 1 pushback means further includes first through hole forming means for forming a first through hole in the first product plate,
The said 2nd pushback means is further provided with the 2nd through-hole formation means for forming a 2nd through-hole in the said 2nd product board, The base plate processing in any one of Claim 1-8 Mold. The manufacturing method of the processed board provided with the following processes.
(B) The mother board machining die according to claim 1, comprising the first pushback means and the cutting line forming means removed.
In the first pushback means, a pushback step of punching one or more first product plates (A) from the mother plate and fitting the punched first product plates (A) into the original holes.
(B) The first product plate (A) is transported so that the first product plate (A) is on the outer shape cutting means, and in the first pushback means, one or more first product plates ( B) is newly punched, and the first product plate (B) thus punched is inserted into the original hole,
In the outer shape cutting means, an outer shape cutting step of cutting the first processed plate including the first product plate (A) pushed back in the immediately preceding press from the mother plate. The manufacturing method of the processed board provided with the following processes.
(A) The mother board processing mold according to claim 1, wherein the first pushback means is replaced with the second pushback means, and the cutting line forming means is attached.
In the second pushback means, a pushback step of punching one or more second product plates (A) from the mother plate and fitting the punched second product plates (A) into the original holes.
(B) The mother plate is conveyed so that the second product plate (A) is on the outer shape cutting means, and one or two or more second product plates (from the mother plate in the first pushback means) B) is newly punched, and at the same time, the punched second product plate (B) is inserted into the original hole,
The external cutting means includes the second product plate (A) formed in the long hole and / or the small hole along the cutting line or in the vicinity thereof, and pushed back in the immediately preceding press, and unnecessary. An outer shape cutting step of cutting out the second processed plate to which the portions are connected from the mother plate.
(C) An unnecessary portion breaking step of breaking the unnecessary portion along the cutting line to obtain the second processed plate. The manufacturing method of the processed board provided with the following processes.
(A) Using the mold for processing a mother board according to claim 2, comprising the first pushback means, and the cutting line forming means is removed.
In the first pushback means, a pushback step of punching one or more first product plates (A) from the mother plate and fitting the punched first product plates (A) into the original holes.
(B) The first product plate (A) is transported so that the first product plate (A) is on the blanking region, and one or more first product plates from the mother plate in the first pushback means. (B) is newly punched, and the first product plate (B) thus punched is inserted into the original hole,
A blanking step of pressing the base plate in which the first product plate (A) pushed back in the immediately preceding press is fitted in the blanking region.
(C) The first product plate (A) and the first product plate (B) are transported so that the first product plate (B) is on the outer shape cutting means and the blanking area, respectively, and the pushback means , One or more first product plates (C) are newly punched from the mother plate, the punched first product plate (C) is fitted into the original hole, At the same time as pressing the base plate in which the first product plate (B) pushed back in the press is fitted,
In the outer shape cutting means, an outer shape cutting step of cutting the first processed plate including the first product plate (A) pushed back in the press two times before from the mother plate. The manufacturing method of the processed board provided with the following processes.
(A) The first pushback means is replaced with the second pushback means, and the cutting line forming means is attached.
In the second pushback means, a pushback step of punching one or more first product plates (A) from the mother plate and fitting the punched second product plates (A) into the original holes.
(B) The mother plate is transported so that the second product plate (A) is on the blanking region, and one or more second product plates from the mother plate in the second pushback means. (B) is newly punched and the second product plate (B) punched is inserted into the original hole,
A blanking step of pressing the base plate in which the second product plate (A) pushed back in the immediately preceding press is inserted in the blanking region.
(C) transporting the base plate so that the second product plate (A) and the second product plate (B) are respectively on the outer shape cutting means and the blanking region; , One or more second product plates (C) are newly punched from the base plate, the punched second product plate (C) is fitted into the original hole, At the same time as pressing the base plate in which the second product plate (B) pushed back in the press is fitted,
In the outer shape cutting means, the second product plate (A) formed by forming the elongated hole and / or the small hole along the cutting line or in the vicinity thereof and pushed back in the press twice before, and The outer shape cutting step of cutting out the second processed plate to which the unnecessary portion is connected from the mother plate.
(D) An unnecessary part breaking step of breaking the unnecessary part along the cutting line to obtain the second processed plate. The manufacturing method of the product board which fractures | ruptures the frame part of the processed board obtained by the method in any one of Claim 10-13, and isolate | separates a product board.

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