JPH1015929A - Method and apparatus for laminating ceramic green sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a ceramic green sheet laminate from being deformed and damaged by cutting, laminating and press-bonding caramic green sheets. SOLUTION: Width of cutting of a ceramic green sheet (b) is adjustable at the first cutting station 1 and a ceramic green sheet (c) in continuous lengths with the adjusted width carried in the longer direction is cut. Then, carried length of the ceramic green sheet is adjustable at a quantitatively carrying mechanism 2 and the ceramic green sheet (b) is carried by the adjusted length. Then, at the second cutting station 3, the front part of the ceramic green sheet (b) in continuous lengths carried by the quantitatively carrying mechanism 2 is cut by the carried length. The cut ceramic green sheets are laminated at a laminating station and these laminated ceramic green sheets are pressed in the laminated direction at a press bonding station 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to cutting ceramic green sheets when manufacturing electronic parts such as multilayer ceramic capacitors and multilayer ceramic inductors by laminating ceramic green sheets partially having electrode patterns. And a method and apparatus for laminating and crimping.

[0002]

2. Description of the Related Art A multilayer ceramic capacitor or a multilayer ceramic inductor, which is the most typical example of a multilayer electronic component, has a large number of dielectric or magnetic ceramic layers having internal electrodes stacked thereon, and the internal electrodes are formed at end faces of the multilayer body. Has been drawn to. External electrodes are formed on the end faces of the laminate from which these internal electrodes are drawn.

In order to manufacture such a laminated electronic component, first, a finely divided ceramic powder and an organic binder are kneaded to prepare a slurry, which is made of a long polyethylene terephthalate film or the like by a doctor blade method. Spread thinly on the carrier film, dry,
Make a ceramic green sheet. Next, a conductive paste is printed by a screen printing method with the ceramic green sheet placed on the support film, and dried. Thereby, a long ceramic green sheet on which the internal electrode pattern is printed is obtained.

Next, a long ceramic green sheet having an internal electrode pattern is peeled from the carrier film, cut into a predetermined shape based on the position of the internal electrode pattern, and the cut ceramic green sheets are laminated. I do. In this case, when the ceramic green sheets to be laminated are ceramic green sheets containing a magnetic material, a method of embedding a magnet in the laminating station to adsorb and hold the ceramic green sheets and stacking them is used. Further, the laminate is pressed in the laminating direction of the ceramic green sheets, pressed and then cut into a desired size to produce a laminated green chip, and the green chip is fired.
The chip-shaped laminate thus obtained has a cubic shape having internal electrodes and having all or a part of the internal electrodes exposed at the end faces. Next, a conductive paste is applied to both ends of the fired laminated body and baked to form external electrodes at both ends, thereby completing a laminated electronic component.

[0005]

As described above, when a magnet is buried in a laminating station and a ceramic green sheet containing a magnetic material is attracted to and held by the laminating station, the laminated body of ceramic green sheets is surely held. Can be held. However, when the laminate of ceramic green sheets is taken out of the lamination station, it is difficult to peel off the laminate, and if the laminate is forcibly peeled off, the laminate is damaged or damaged. Further, in the conventional ceramic green sheet laminating method and apparatus as described above,
A tray-shaped platen having a concave portion corresponding to the vertical and horizontal dimensions of the ceramic green sheet to be cut is used, and the cut ceramic green sheets are laminated and temporarily pressed in the concave portion of the platen.

However, the elongation of the ceramic green sheet at the time of temporary compression differs depending on the type and the mixing ratio of the ceramic component and the binder component. When such a laminate of ceramic green sheets is temporarily press-bonded in the concave portion of the platen, the edge of the laminate is strongly pressed against the inner wall in the concave portion of the platen due to elongation of the laminate. May be deformed or damaged. Further, the edge of the laminate is in close contact with the wall surface of the recess, and it is difficult to remove the laminate from the platen. On the other hand, when the laminate of the ceramic green sheets is temporarily press-bonded in the recess of the platen, if the laminate is too small in comparison with the size of the recess of the platen, the laminate in the planar direction will grow too large, and the internal electrode The dimensional accuracy of the pattern and the lamination accuracy thereof deteriorate.

In view of the above problems in the conventional ceramic green sheet laminating apparatus, the present invention cuts and laminates ceramic green sheets to appropriate vertical and horizontal dimensions in accordance with the elongation of the ceramic green sheets during temporary compression. ,
This can be crimped to prevent deformation and breakage of the ceramic green sheet laminate,
An object of the present invention is to improve the dimensional accuracy of the internal electrode pattern and the lamination accuracy thereof.

[0008]

According to the present invention, in order to achieve the above-mentioned object, a cutting width is set in a cutting step of a long ceramic green sheet c before laminating and pressing the cut ceramic green sheets a. The w and the cut length l were appropriately adjusted so that the ceramic green sheet a was cut into the optimum length and width dimensions, and then the cut ceramic green sheets a were laminated and pressed.

That is, in the method of laminating ceramic green sheets, a long ceramic green sheet c is cut into predetermined vertical and horizontal dimensions, and a plurality of the cut ceramic green sheets a are laminated. And presses the ceramic green sheet a by pressing in the laminating direction. In such a method for laminating ceramic green sheets, in the present invention, the cutting step of the ceramic green sheets is performed by dividing into first and second cutting steps. First, in the first cutting process,
The cutting width w is adjustable, and the long ceramic green sheet c is cut at the adjusted width. Further, in the second cutting step, the cutting length 1 is adjustable, and the long ceramic green sheet b is cut at the adjusted length. Thereafter, in the laminating step, the cut ceramic green sheets a are stacked, and in the pressing step, the ceramic green sheets a stacked in the laminating step are pressed in the laminating direction to compress the ceramic green sheets a.

Here, in the second cutting step, the cutting length l can be adjusted, and a more specific method of cutting the long ceramic green sheet b with the adjusted length is as follows. Can be adjusted, and a fixed length feeding step of the ceramic green sheet for feeding the long ceramic green sheet b by the adjusted length is performed. Then, in the second cutting step, the long ceramic green sheet b
Is cut by the length sent by the feeding step.

Further, the apparatus according to the present invention for carrying out such a method for laminating ceramic green sheets comprises a first cutting station 1 for cutting ceramic green sheets and a second cutting station for cutting ceramic green sheets corresponding to the method for laminating ceramic green sheets. And a cutting station 3. First, in the first cutting station 1, the cutting width w is adjustable, and the long ceramic green sheet c fed in the longitudinal direction at the adjusted width is cut. Next, in the second cutting station 3, the cutting length l is adjustable, and the long ceramic green sheet b is cut with the adjusted length. Further, a laminating station 5 and a crimping station 7 are provided, the cut ceramic green sheets a are stacked, and the stacked ceramic green sheets a are pressed in the laminating direction to crimp the ceramic green sheets a.

In the second cutting station 3, each time the long ceramic green sheet b is cut, the individual ceramic green sheets a after cutting may be transported to the stacking station 5 and stacked. A plurality of ceramic green sheets a may be cut and stacked at the second cutting station 3, and the plurality of ceramic green sheets a may be collectively conveyed to the laminating station 5 and the crimping station 7.

Here, in the second cutting station 3, in order to make the cutting length l adjustable and to cut the long ceramic green sheet b with the adjusted length,
For example, the fixed amount feeding mechanism 2 is used. That is, the ceramic green sheet b is sent to the second cutting station 3 by the adjusted feeding length by the fixed-quantity feeding mechanism 2 whose feeding length is adjustable. Then, in the second cutting station 3, the leading portion of the long ceramic green sheet b is cut by the length sent by the fixed amount feeding mechanism 2.

The fixed-quantity feeding mechanism 2 includes a ceramic green sheet holding head 21 which reciprocates in the longitudinal direction of the ceramic green sheet b and whose movement stroke can be adjusted. A mechanism for feeding the leading portion of the ceramic green sheet b by the reciprocating stroke may be employed.
Means for cutting the long ceramic green sheet c at the adjusted cutting width w in the first cutting station 1 include, for example, orthogonal to the feeding direction of the long ceramic green sheet c sent in the longitudinal direction. A cutter provided with a pair of cutters 10, 10 that are opposed to each other in a direction and that can adjust the interval can be used. This cutter 10, 1
By cutting the ceramic green sheet c according to 0, the ceramic green sheet c can be cut with the adjusted cutting width w.

In such a ceramic green sheet laminating apparatus and a laminating method using the same, first, when the first cutting method is performed in the first cutting station 1, for example, a pair of cutters 10, 10 By adjusting the interval, the long ceramic green sheet c can be cut at a previously adjusted width. Further, when the second cutting step is performed in the second cutting station 3, for example, by adjusting the stroke of the reciprocating movement of the ceramic green sheet b in the longitudinal direction by the fixed amount feeding mechanism 2, the ceramic green sheet b is adjusted. Of the ceramic green sheet b can be adjusted in advance. That is, the vertical and horizontal dimensions of the ceramic green sheet a after cutting can be arbitrarily adjusted.

Thus, the ceramic green sheet c
In consideration of the difference in elongation at the time of temporary press-bonding due to the difference in the components, the vertical and horizontal dimensions of the cut can be adjusted.
For example, in the laminating step in the laminating station 5 and the crimping step in the crimping station 7, the ceramic green sheets a are laminated in the recesses of the tray-like platen 56 and crimped. In this case, as described above, the cutting width and the length of the ceramic green sheets c and b are appropriately changed, and adjustment is performed so that a laminate size suitable for the size of the concave portion of the platen 56 can be obtained at the time of temporary compression bonding. It is possible to do.

[0017]

Embodiments of the present invention will now be described specifically and in detail with reference to the drawings. FIG. 1 shows an overall layout of an example of a ceramic green sheet laminating apparatus according to the present invention. As shown in FIG. 1, the ceramic green sheet laminating apparatus includes:
Conveying means for feeding a long ceramic green sheet c in the longitudinal direction, a first cutting station 1 for cutting the long ceramic green sheet c at a predetermined width, and a ceramic green sheet b cut to a predetermined width And a second cutting station 3 for cutting the leading portion of the long ceramic green sheet b sent by the constant-rate feeding mechanism 2;
A laminating station 5 for stacking the cut ceramic green sheets a, and a crimping station 7 for compressing the ceramic green sheets a by pressing the ceramic green sheets a stacked in the laminating station 5 in the laminating direction.

As shown in FIG. 2, a ceramic green sheet c is formed by applying a thin ceramic slurry to a predetermined width and a uniform thickness on a carrier film d such as a long polyethylene terephthalate film, and forming the dried ceramic slurry. Have been. Accordingly, the ceramic green sheet c is continuously conveyed to the first cutting station 1, which is the first station, in the longitudinal direction thereof while being supported on the carrier film d. The rollers 18, 1 shown in FIG.
The reference numerals 8... Continuously transport the carrier film d supporting the ceramic green sheet c in its longitudinal direction.

By this continuous conveyance, the carrier film d
Pass over the cutter base 14 by the rollers 18 while supporting the ceramic green sheet c thereon. Brackets 12, 12 are attached to both sides of the cutter base 14, and the mounting height of the brackets 12, 12 to the cutter base 14 is:
The height is adjusted by the height adjusting screws 13.

Between the brackets 12, a pair of parallel rod-shaped linear guides 11, 11 are vertically installed in parallel. And this linear guide 1
Cutter support parts 15 and 15 are attached to 1 and 11, respectively. The cutter supports 15, 15 are slidably mounted in the longitudinal direction of the linear guides 11, 11, and the mounting positions thereof can be fixed by fixing screws 16, 16. This cutter support 15,
Disk-shaped cutters 10, 10 are pivotally supported on both sides of the cutter 15. The cutters 10, 10 are driven to rotate by a driving source such as a motor (not shown).

In the first cutting station 1, the ceramic green sheet c of the carrier film d continuously running on the cutter base 14 is attached to the cutter 10,
While the cutter 10 is being applied, the cutters 10 and 10 are rotated to cut the ceramic green sheet c to a predetermined width. As shown in FIG. 3, the cutting width w of the ceramic green sheet c at this time is determined by the interval between the cutters 10 and 10, and the interval between the cutters 10 and 10 is linear with the cutter supporting portions 15 and 15. Guides 11, 11
Determined by the position above. In other words, the fixing screw 1
6 and 16 are loosened, and the cutter supports 10 and 15 are moved along the longitudinal direction of the linear guides 11 and 11 to adjust the distance between the cutters 10 and 10. , 16 are tightened to fix the positions of the cutter support portions 15, 15. Thereby, the interval between the cutters 10 and 10 can be arbitrarily adjusted.

The cutting depth of the cutters 10 and 10 into the ceramic green sheet c depends on the height adjusting screw 1.
This is performed by adjusting the mounting height of the brackets 12 and 12 with the use of 3 and 13. Also, the linear guides 11, 11
The upper and lower surfaces of the cutter base 14 are also parallelized by the height adjustment screws 13, 13.
This is done by adjusting the mounting height.

Here, the positions of the cutter supporting portions 15, 15 may be changed simultaneously by means of manual or electric means by using a screw mechanism using ball screws having leads in opposite directions on both sides. . That is, a ball screw having opposite leads on both sides is installed in a freely rotatable manner between the brackets 12 and 12 in parallel with the linear guides 11 and the both sides of the ball screw are penetrated and screwed into the cutter support portions 15 and 15. Then, make a pair of screws. Thus, by manually rotating the handle provided at the end of the ball screw, or by rotating the motor connected to the ball screw, the support portions 15, 1 on both sides of the cutter can be rotated.
5 can move in opposite directions and change their positions.

In this manner, the long ceramic green sheet b cut at a predetermined width is sent to the second cutting step, which is the next cutting step. In the illustrated example, the ceramic green sheet b is cut. Before being supported on the carrier film d, the carrier film d is peeled from the ceramic green sheet b before passing through the peeling station 8 as shown in FIG. The peeling station 8 includes a horizontal strip blade 17 having a sharp edge in the form of a knife edge, through which a carrier film d supporting a ceramic green sheet b is passed. And the strip blade 1
At the knife edge portion at the tip of 7, only the carrier film d is sharply folded downward and taken obliquely downward. As a result, only the cut carrier film b is peeled off from the carrier film d, and is pulled obliquely downward with the carrier film d together with the cut edge portions of the ceramic green sheets on both sides. The cut ceramic green sheet b is guided by the roller 18, the buffer roller 19, and the roller 18, and is sent to the next second cutting station 3.

As shown in FIG. 4, a cutting table 20 having a flat upper surface is disposed in the second cutting station 3.
The upper surfaces of the front and front portions of the cutting table 20 each have a suction surface on which the ceramic green sheet a can be suctioned by the vacuum suction means. That is,
Suction plates 46 and 32 made of a porous body having fine continuous through holes are stretched over the front and rear portions of the cutting table 20, and vacuum chambers 47 and 31 formed behind the suction plates 46 and 32 are provided with a vacuum suction mechanism (not shown). As a result, the pressure is reduced to a negative pressure or returned to the atmospheric pressure. As a result, the ceramic green sheet c can be adsorbed on the upper surfaces of the suction plates 46 and 32, or the adsorption can be released.

As shown in FIG. 4 and FIG. 5, the second cutting station 3 is provided with a fixed amount feeding mechanism 2 for fixedly feeding the leading portion of the ceramic green sheet b to the same cutting station 3. This quantitative feed mechanism 2
Is a holding head 2 for holding a leading portion of the ceramic green sheet b conveyed on the cutting table 20.
1 is provided. The holding head 21 is moved so as to cover the entire stroke of the cutting table 20.
As the illustrated holding head 21, one that holds the ceramic green sheet b by vacuum suction means is illustrated. That is, as shown in FIG.
A suction plate 22 made of a porous body having fine continuous through holes is stretched on the lower surface of 1, and a vacuum chamber formed behind the suction plate 22 is subjected to negative pressure or large pressure by a vacuum suction mechanism (not shown). It is returned to atmospheric pressure. Thereby, the suction plate 2
The ceramic green sheet b can be adsorbed on the lower surface of the second 2, or the adsorption can be released.

The holding head 21 using this vacuum suction means can be applied to any type of ceramic green sheet b. For example, the ceramic green sheet b is made of a magnetic ceramic green such as a ferrite ceramic. In the case of a sheet, magnetic attraction means can be used in addition to the vacuum attraction means, and of course, they can be used together.

As shown in FIG. 4, the holding head 21
Is attached to a moving mechanism via a bracket arm 28, and is moved vertically and horizontally in FIG. 4 by the moving mechanism. That is, the bracket arm 28
Is attached to the vertical movement block 23. The horizontal moving block 25 is attached to the vertical moving block 23 by a vertical linear guide, and is slidable up and down with respect to the horizontal moving block 25. A drive unit 24 such as an air cylinder is connected to the vertical movement block 23, and the vertical movement block 23 is moved up and down by the drive unit 24.
The horizontal moving block 25 includes a horizontal linear guide 26,
It is slidably mounted in the horizontal direction along 26. A ball screw 2 parallel to the linear guides 26, 26 rotated by a driving unit 29 such as a servomotor;
7 is penetrated and screwed into the horizontal moving block 25.
Therefore, when the ball screw 27 is rotated by the driving unit 29, the horizontal moving block 25 moves in the horizontal direction. In this way, the holding head 21 is
By the drive of 4, 29, it is moved up and down and left and right.

The leading end of the cutting table 20 has a suction surface on which the ceramic green sheet a can be sucked by vacuum suction means. That is,
On the plate surface of the cutting table 20, a suction plate 32 made of a porous body having fine continuous through holes is stretched, and a vacuum chamber 31 formed behind the suction plate 32 is set to a negative pressure by a vacuum suction mechanism (not shown). Or returned to atmospheric pressure. Thereby, the ceramic green sheet c can be adsorbed on the upper surface of the suction plate 32, or the adsorption can be released.

The holding head 3 that sucks and holds the cut ceramic green sheet a on the suction plate 32.
3 are arranged. As the holding head 33, a holding head that holds a cut ceramic green sheet a using both vacuum suction means and magnetic force suction means is illustrated. That is, as shown in FIG.
A suction plate 22 made of a porous body having fine continuous through holes is stretched on the lower surface of the, and a vacuum chamber formed behind the suction plate 22 is set to a negative pressure or an atmospheric pressure by a vacuum suction mechanism (not shown). It is returned to. Thereby, the suction plate 22
The top portion of the ceramic green sheet b is attracted to the lower surface of the ceramic green sheet b, or the suction can be released. The holding head 33 includes an electromagnet 35. When the ceramic green sheet a is a magnetic ceramic green sheet such as a ferrite ceramic, the electromagnet 35 is used.
Can also be attracted using the magnetic force of That is, the electromagnet 3
By exciting the magnetic material 5, the ceramic green sheet a, which is a magnetic material, is attracted by its magnetic force, and by demagnetizing the electromagnet 35, the ceramic green sheet a is released.

The holding head 33 is mounted on the mounting plate 30 via a vertical guide and a vertical drive unit 37 such as an air cylinder, and is moved up and down by the drive unit 37. Further, the mounting plate 30 is horizontally supported by a slider 44 shown in FIG. The slider 44 is moved by a linear moving mechanism between the front and the back in FIG. 4, that is, between the lower left and the upper right in FIG. A linear guide 41 is installed in parallel between the side plate 39 shown in FIGS. 4 and 5 and a side plate (see FIG. 1) on the lamination station 5 side described later,
The slider 44 is slidably mounted along the linear guide 41. The linear guide 4
A ball screw 40 is installed in parallel with 1, and the ball screw 40 penetrates and engages with the slider 44 to form a screw pair. The ball screw 40 is rotated by a drive unit 42 such as a servo motor. Therefore, when the ball screw 40 is rotated forward and backward by the driving unit 42, the slider 44 reciprocates along the linear guide 41, and the holding head 33 attached to the attachment plate 30 reciprocates in the same direction.

A blade-shaped cutter 36 is mounted so as to move up and down along the front side surface of the holding head 33, that is, the right side surface in FIG. That is, an actuator 38 such as a solenoid or an air cylinder is attached to a side portion in front of the attachment plate 30,
The blade-shaped cutter 36 connected to the actuator 38 moves up and down along the side surface in front of the holding head 33. On the cutting table 20, the cutter 36
An escape groove 44 for escaping the cutting edge of the cutter 36 is provided in an extension of the cutting edge.

In the second cutting station 3, when the ceramic green sheet b is cut by the cutter 36 of the holding head 33, the lower surface of the holding head 21 of the fixed amount feeding mechanism 2 and the upper surface of the suction plate 46 of the cutting table 20 are previously determined. The portion before the cutting position of the ceramic green sheet b is sucked and held. That is, the holding head 21 of the fixed amount feeding mechanism 2 is lowered by the moving mechanism, and the lower surface of the holding head 21 and the upper surface of the suction plate 46 of the cutting table 20 are set to a negative pressure. The ceramic green sheet b is sandwiched between the lower surface and the upper surface of the suction plate 46, and is adsorbed and held.

In this state, as described later, the holding head 33 is moved by the cutter 36 to the ceramic green sheet b.
After the cutting, the holding head 33 sucks and holds the cut ceramic green sheet a on the lower surface thereof,
Rise. When the holding head 33 rises in this way,
The negative pressure on the upper surface of the suction plate 46 of the cutting table 20 is released, and the suction plate 46 releases the suction of the ceramic green sheet b. Subsequently, the holding head 21 is slightly lifted from above the cutting table 20 while adsorbing the cut portion of the ceramic green sheet b, and the cutting table 2
It moves by a predetermined distance l to the front of 0 (to the left in FIG. 4). Then, while the holding head 21 is lowered, the negative pressure on the lower surface is released, and the suction of the leading portion of the ceramic green sheet b is released. At the same time, cutting table 2
The upper surface of the zero suction plate 32 is set to a negative pressure, and the leading portion of the ceramic green sheet b is sucked and held on the suction plate 32. Thereafter, the holding head 21 returns to the original position.
Then, as described above, the holding head 21 adsorbs a portion of the lower surface of the holding head 21 immediately before the position to be cut next to the ceramic green sheet b. Such a change in tension accompanying the feeding of the ceramic green sheet b by the constant-rate feeding mechanism 2 is absorbed by the above-described buffer roller 19 shown in FIG.

At the same time, the holding head 33 provided with the cutter 36 is lowered, the lower surface thereof is set to a negative pressure, and the electromagnet 35 is excited. As a result, the leading end of the ceramic green sheet b is attracted to the lower surface of the holding head 33.
Will be retained. Here, by the operation of the actuator 38, the cutter 36 is lowered along the side surface of the holding head 33, and cuts the leading portion of the ceramic green sheet b. Thus, the leading portion of the ceramic green sheet b is cut by the length l to which the holding head 21 of the fixed amount feeding mechanism 2 has sent the ceramic green sheet b. That is, the ceramic green sheet b is attached to the holding head 21 of the fixed amount feeding mechanism 2.
Of the ceramic green sheet b determined by the moving stroke of the ceramic green sheet b.

Next, the cutter 36 is raised by the operation of the actuator 38, and the cutting edge thereof is moved to the holding head 33.
, The negative pressure on the upper surface of the suction plate 32 is released, and the holding head 33 is further raised by the vertical drive unit 37. As a result, the holding head 33 rises while adsorbing the cut ceramic green sheet a on the lower surface thereof.

By repeating this operation, the leading portion of the long ceramic green sheet b is cut into a predetermined length l, and the cut ceramic green sheets a are sequentially stacked on the lower surface of the holding head 33. Adsorbed and retained. Thus, the ceramic green sheet b
Is repeated, and when a predetermined number of ceramic green sheets a are sucked and held on the lower surface of the holding head 33, the holding head 33 is moved to the laminating station 5 side by the above-described linear moving mechanism, and as described later. In the same station 5, ceramic green sheets a are laminated.

In the above-described process, the cutting of the ceramic green sheets b is repeated while being held by the holding head 33, and a plurality of cut ceramic green sheets a are stacked on the lower surface of the holding head 33. The green sheets a were simultaneously sent to the next laminating station 5 at a time. On the other hand, each time the cutter 36 cuts the leading portion of the long ceramic green sheet b, the cut ceramic green sheet b may be conveyed to the laminating station 5.

The length l of the ceramic green sheet b cut in this way is equal to the length of the ceramic green sheet b fed by the holding head 21 of the above-mentioned fixed quantity feeding mechanism 2. Therefore, by changing the stroke of the holding head 21 and changing the feed length of the ceramic green sheet b, the length cut by the cutter 36 is determined. In other words, the cutting length of the ceramic green sheet b in the second cutting station 3 can be adjusted by changing the moving stroke of the holding head 21.

Since the ceramic green sheet b is cut to a predetermined width w at the first cutting station 1, the ceramic green sheet b is cut to a length 1 at the second cutting station 3. , A width w and a length l are obtained. As described above, the longitudinal and lateral dimensions of the finally cut ceramic green sheet a are adjusted by appropriately adjusting the cutting width w and the cutting length l of the ceramic green sheet in the first and second cutting stations 1 and 3. Can be adjusted.

As shown in FIG. 1, the laminating station 5
The linear guide 41 and the end of the ball screw 40 reach the side of the second cutting station 3. Therefore, the holding head 33 for sucking and holding the cut ceramic green sheet a moves to the laminating station 5. As shown in FIGS. 6 and 7, this laminating station 5
The platen 56 is provided with a platen holder 57 for holding the platen 6, and the platen 56 is mounted on the platen holder 57 and can be fixed. The linear guide 4
1 and holding head 33 moving along ball screw 40
Moves right above the platen holding base 57.

The platen 56 is shown in FIG.
As shown in FIG. 7, the cross section is a tray having a square planar shape, and has a rectangular concave portion on the upper surface. The vertical and horizontal dimensions of the recess are slightly larger than the cutting width w and the cutting length 1 of the ceramic green sheet. As shown in FIG. 1, the platen 56 is conveyed from the right side in FIG.

As shown in FIG. 7, the platen support 5
A holding means for holding and fixing the platen 56 is provided on the upper surface of 7. In the illustrated example, an electromagnet 59 is embedded in the platen holding base 57 in order to attract and hold the ceramic green sheet a containing the magnetic material stored in the platen 56 sent by the conveyor 55. By exciting the electromagnet 59 or canceling the excitation, the ceramic green sheet a housed in the platen 56 on the upper surface of the platen holding base 57 can be sucked and held, or this sucking can be released.

As the holding means for the platen 56, for example, when the ceramic green sheet a housed in the platen 56 is a non-magnetic material, a vacuum suction means can be used. For example, a porous plate similar to the cutting table 20 is provided on the upper surface of the platen holding table 57, and a vacuum chamber is provided behind the porous plate. Further, in order to provide air permeability to the bottom wall of the platen 56, the bottom wall is formed of a porous plate. Thus, by setting the vacuum chamber to a negative pressure, the bottom surface of the platen 56 becomes a negative pressure via the porous plate, and the ceramic green sheet a can be vacuum-adsorbed there.

Around the platen holding table 57, positioning pins 52, 53, 58 are provided as positioning means for stopping the platen 56 sent by the conveyor 55 and determining the stop position. this house,
The positioning pins 52 are fixed positioning pins provided on the side of the platen holding table 57, and are arranged upright in the transport direction of the platen 56. The positioning pin 58 is a positioning pin provided in front of the platen holding base 57 and moved up and down. When the new platen 56 is conveyed, it rises and stops the platen 56. Platen 5
When feeding 6 first, the positioning pin 58 descends.
The positioning pin 53 is a positioning pin provided on the rear side and the other side of the platen holding base 57 and moved up and down and moved back and forth by the driving unit 54. These positioning pins 53
Descends when a new platen 56 is conveyed,
Although the platen 56 is retracted, the positioning pin 58
When stopped, the platen rises and moves forward, hits the rear surface and the side surface of the platen 56, and positions the platen 56 at a predetermined position. Then, the platen support 57
The lower surface of the platen 56 is sucked and held on the upper surface of the platen.

A sheet stock stage 61 for stocking sheets is provided on the side of the laminating table 51. The spacer sheet e is mounted on an area surrounded by stock pins 62 in a stacked manner. As the spacer sheet e, a fluorine tetrachloride resin sheet having good releasability is used. A suction head 65 for sucking and holding the spacer sheet e is disposed on the sheet stock stage 61. The suction head 65 is moved up and down by a drive unit 63, and is moved along a linear guide 64 along a sheet guide. Immediately above the stage 61 and the lamination table 5
It reciprocates between and just above 1.

In the laminating station 5, the platen 5
1 is conveyed from the right side of FIG. 1 by the conveyor 55, and reaches the platen holding base 57 as shown in FIGS. Then, the positioning pins 58 which have been raised in advance
As a result, the platen 56 is stopped, and the platen 56 is positioned at a predetermined position by abutting of the positioning pin 53. After that, the lower surface of the platen 56 is sucked and held on the upper surface of the platen holder 57. At the same time, the suction head 65 sucks and holds the spacer sheet e on the sheet stock table 61 side. Then, this suction head 6
5 moves to the lamination station 5 side, and places the spacer sheet e on the stacked ceramic green sheets a. Thereafter, the suction head 65 returns to the sheet stock table 61 side and waits.

In this state, the holding head 33 successively cuts the ceramic green sheet b having a width w at a predetermined length 1 at the second cutting station 3 as described above, When the ceramic green sheets a are stacked and a predetermined number of ceramic green sheets a are stacked, the ceramic green sheets a reciprocate between the second cutting station 3 and the laminating station 5 to cut and stack the ceramic green sheets a. Place in the 56 recess.

After a predetermined number of ceramic green sheets a are stacked in the recesses of the platen 56,
On the sheet stock table 61 side, the suction head 65 sucks and holds the spacer sheet e, and the suction head 6
5 moves to the lamination station 5 side, and places the spacer sheet e on the stacked ceramic green sheets a. Thereafter, the suction head 65 returns to the sheet stock table 61 side and waits. Next, in the same manner as described above, the ceramic green sheets a are stacked in the recesses of the platen 56, and when a predetermined number of sheets are stacked, the spacer sheet a is placed thereon.
Thereafter, a predetermined number of ceramic green sheets a are stacked in the recesses of the platen 56 in the same manner via the spacer sheet e.

Thereafter, when the stacking of the predetermined number of ceramic green sheets a is completed, the positioning pins 5
The platen 56 is conveyed to the next crimping station 7 by the conveyor 55. Thereafter, the positioning pins 58
Rises again, and the positioning pin 53 moves down and retreats. Subsequently, the next platen 56 is conveyed onto the platen holding base 57 by the conveyor 55, and is positioned and held as described above. Hereinafter, the stacking of the ceramic green sheets a is performed in the same manner.

As shown in FIG. 1, the crimping station 7
The platen 56 is disposed on the side where the platen 56 is conveyed by the conveyor 55. As shown in FIGS. 8 and 9, the crimping station 7 includes a crimping table 77 having a platen holding base 76 for holding the platen 56 so that the platen 56 can be mounted on the platen holding base 76. . As described above, the platen 56 is transported by the conveyor 55 from the laminating station 5 in the foreground.

As shown in FIG. 9, the platen support 7
6 has a built-in heater 79 for heating the upper surface thereof. Around the platen holding base 76, positioning pins 72, 73, and 78 are provided as positioning means for stopping the platen 56 sent by the conveyor 55 and determining the stop position. this house,
The positioning pins 72 are fixed positioning pins provided on the sides of the platen holding base 76, and are arranged upright in the transport direction of the platen 56. The positioning pin 78 is a positioning pin provided in front of the platen holding base 57,
The conveyed platen 56 is stopped. The positioning pins 73 are provided behind and on the other side of the platen holding base 76, and are vertically moved and moved back and forth by the drive unit 74. These positioning pins 73 are lowered and retreated when a new platen 56 is conveyed. However, when the platen 56 is stopped by the positioning pins 78, the positioning pins 73 are raised and advanced, and the rear surface of the platen 56 is moved. The platen 56 is positioned at a predetermined position.

Above the platen holding base 76, a pressing die 81 is arranged. The pressing die 81 is moved up and down by a hydraulic press (not shown) toward a concave portion of the platen 56 mounted on the holding base 76. Thus, the ceramic green sheets a stacked in the recesses of the platen 56 are pressed and pressed. This pressing die 8
A heater 82 for heating the lower surface is built in 1.

In this crimping station, the platen 56
Is transported by the conveyor 55, the platen 56 transported by the positioning pins 78 is stopped. Further, the positioning pin 73 is raised and advanced by the driving unit 74 and abuts against the rear surface and the side surface of the platen 56, and the platen 56 is positioned at a predetermined position together with the other positioning pins 72 and 78 and fixed on the platen holding base 76. I do.

Thereafter, the pressing die 81 above the platen holding base 76 is lowered by a hydraulic press, and the ceramic green sheets a in the recesses of the platen 56 mounted on the holding base 76 are pressed in the stacking direction. Is done. At this time,
The ceramic green sheet a is pressurized while being heated by the heat generated by the heater 82 inside the pressing die 81 and the heater 79 inside the platen holding base 76. As a result, the ceramic green sheets a laminated by a predetermined number are laminated through the spacer sheet e.

In this pressing step, the ceramic green sheets a in the concave portions of the platen 56 extend in the surface direction. Without
In addition, it is desirable that it is not extremely smaller than the recess. For this purpose, the result of the crimping step at the crimping station 7 is fed back to the first and second cutting steps at the first and second cutting stations 1 and 3, and the cutting width w and the cutting width at each step. It is preferable to adjust the length l as appropriate. With this laminating apparatus and method, the cutting width w and the cutting length 1 can be easily adjusted.

Further, the transfer from the laminating step to the pressing step, the pressing in the pressing step and the removal after the pressing are facilitated, and the laminated body e of the ceramic green sheets a is not damaged. The pressure bonding step performed in the pressure bonding station 7 is pressure bonding for preventing peeling of the ceramic green sheet a in a subsequent step, and is called so-called temporary pressure bonding. Usually, the final press bonding is performed at a higher pressure.

[0058]

As described above, according to the present invention, the first and second cutting stations 1 and 3 in the first cutting station 1 and the second cutting station 3 according to the elongation of the ceramic green sheet a during the pressing in the pressing step. Since the cutting width w and the cutting length 1 of the ceramic green sheets b and a in the second cutting step can be appropriately adjusted, the ceramic green sheets a are cut and laminated to have appropriate vertical and horizontal dimensions, and can be pressed. become. Thereby, deformation and breakage of the peripheral portion of the stacked body of the ceramic green sheets a can be prevented, and the dimensional accuracy of the internal electrode pattern and the stacking accuracy thereof can be improved. In addition, the laminate e of the ceramic green sheets a is sequentially moved to the laminating station 5 and the crimping station 7 while the laminate e of the ceramic green sheets a is stored in the platen 56, and the lamination step and the crimping step are sequentially performed. There is no need to peel e, and the laminate e is not damaged. Therefore, the yield is improved, and the productivity can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing an entire example of a ceramic green sheet laminating apparatus according to the present invention.

FIG. 2 is a schematic perspective view showing a first cutting station and a peeling station of the example of the ceramic green sheet laminating apparatus.

FIG. 3 is a schematic front view showing a first cutting station of the example of the ceramic green sheet laminating apparatus.

FIG. 4 is a schematic side view showing a second cutting station of the example of the ceramic green sheet laminating apparatus.

FIG. 5 is a schematic perspective view showing a second cutting station of the example of the ceramic green sheet laminating apparatus.

FIG. 6 is a schematic perspective view showing a laminating station of the example of the ceramic green sheet laminating apparatus and a sheet stock stage on a side of the laminating station.

FIG. 7 is a schematic perspective view showing a laminating station of the example of the ceramic green sheet laminating apparatus with a part of a platen cut away.

FIG. 8 is a schematic perspective view showing a pressure bonding station of the example of the ceramic green sheet laminating apparatus.

FIG. 9 is a schematic vertical sectional side view showing a pressure bonding station of the example of the ceramic green sheet laminating apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 First cutting station 2 Fixed amount feeding mechanism 3 Second cutting station 5 Laminating station 7 Crimping station for crimping 10 Cutter of first cutting station 21 Holding head 33 Holding head 36 Cutter of second cutting station 56 Platen 61 Sheet Stock stage a Individually cut ceramic green sheet b Ceramic green sheet cut to predetermined width c Long ceramic green sheet before cutting e Spacer sheet

Claims (19)

[Claims] 1. A long ceramic green sheet (c)
Are cut into predetermined vertical and horizontal dimensions, a plurality of the cut ceramic green sheets (a) are laminated, and the laminate is pressed in the laminating direction of the ceramic green sheets (a) to press the ceramic green sheets (a). In the ceramic green sheet laminating method, a cutting width (w) is adjustable, and a first cutting step of cutting a long ceramic green sheet (c) with the adjusted width and a cutting length (l) are adjusted. A second cutting step of cutting a long ceramic green sheet (b) with the adjusted length, a laminating step of stacking the cut ceramic green sheets (a), and a laminating step of stacking in the laminating step. And pressing the ceramic green sheet (a) in the laminating direction to compress the ceramic green sheet (a). Ceramic green sheet lamination method to. 2. A long ceramic green sheet (c)
Are cut into predetermined vertical and horizontal dimensions, a plurality of the cut ceramic green sheets (a) are laminated, and the laminate is pressed in the laminating direction of the ceramic green sheets (a) to press the ceramic green sheets (a). In the ceramic green sheet laminating method, the cutting width can be adjusted,
A first cutting step of cutting a long ceramic green sheet (c) with the adjusted width; and a feed length adjustable, and a long ceramic green sheet (b) by the adjusted length. A fixed-quantity feeding step of the ceramic green sheet to be sent; a second cutting step of cutting the leading portion of the long ceramic green sheet (b) sent by the feeding step by the sent length; A laminating step of laminating the ceramic green sheets (a), and a pressing step of pressing the ceramic green sheets (a) by pressing the ceramic green sheets (a) laminated in the laminating step in the laminating direction. Characteristic ceramic green sheet laminating method. 3. The ceramic green sheet according to claim 1, wherein in the laminating step and the pressing step, the ceramic green sheets a are laminated and pressed in the recesses of the tray-shaped platen (56). Lamination method. 4. The method according to claim 1, wherein in the laminating step, a laminate of a plurality of ceramic green sheets a is laminated via a spacer sheet (e) having releasability. A method for laminating ceramic green sheets according to any one of the above. 5. A long ceramic green sheet (c)
Are cut into predetermined vertical and horizontal dimensions, a plurality of the cut ceramic green sheets (a) are laminated, and the laminate is pressed in the laminating direction of the ceramic green sheets (a) to press the ceramic green sheets (a). In the ceramic green sheet laminating method, a cutting width (w) is adjustable, and a first cutting step of cutting a long ceramic green sheet (c) with the adjusted width and a cutting length (l) are adjusted. A second cutting step of cutting a long ceramic green sheet (b) with the adjusted length, stacking the cut ceramic green sheets (a), and stacking the stacked ceramic green sheets (a). ) In the stacking direction to press the ceramic green sheet (a). Nshito lamination method. 6. A long ceramic green sheet (c).
Are cut into predetermined vertical and horizontal dimensions, a plurality of the cut ceramic green sheets (a) are laminated, and the laminate is pressed in the laminating direction of the ceramic green sheets (a) to press the ceramic green sheets (a). In the ceramic green sheet laminating method, the cutting width can be adjusted,
A first cutting step of cutting a long ceramic green sheet (c) with the adjusted width; and a feed length adjustable, and a long ceramic green sheet (b) by the adjusted length. A fixed-quantity feeding step of the ceramic green sheet to be sent, and a leading portion of the long ceramic green sheet (b) sent in the sending step is cut by the sent length, and the cut ceramic green sheet ( a) a second cutting step of stacking a)
Pressurizing the stacked ceramic green sheets (a) in the laminating direction to compress the ceramic green sheets (a). 7. A long ceramic green sheet (c)
Are cut into predetermined vertical and horizontal dimensions, a plurality of the cut ceramic green sheets (a) are laminated, and the laminate is pressed in the laminating direction of the ceramic green sheets (a) to press the ceramic green sheets (a). In a ceramic green sheet laminating apparatus, a first cutting station (1) for adjusting a cutting width (w) and cutting a long ceramic green sheet (c) fed in the longitudinal direction at the adjusted width; The cutting length (l) can be adjusted,
A second cutting station (3) for cutting a long ceramic green sheet (b) with the adjusted length; a laminating station (5) for stacking the cut ceramic green sheets (a); And a pressing station (7) for pressing the ceramic green sheets (a) stacked in the station (5) in the stacking direction to press the ceramic green sheets (a). 8. A long ceramic green sheet (c).
Are cut into predetermined vertical and horizontal dimensions, a plurality of the cut ceramic green sheets (a) are laminated, and the laminate is pressed in the laminating direction of the ceramic green sheets (a) to press the ceramic green sheets (a). In a ceramic green sheet laminating apparatus, a first cutting station (1) for adjusting a cutting width (w) and cutting a long ceramic green sheet (c) fed in the longitudinal direction at the adjusted width; The feed length is adjustable, and a fixed amount feeding mechanism (2) for feeding the ceramic green sheet (b) by the adjusted length, and a long ceramic green sheet (b) sent by the fixed amount feeding mechanism (2). ), And a second cutting station (3) for cutting the leading portion of the ceramic green sheet (a) by the sent length. Only overlap laminating station (5)
And a pressure bonding station (7) for pressing the ceramic green sheets (a) stacked in the stacking station (5) in the stacking direction and pressing the ceramic green sheets (a). Sheet laminating equipment. 9. A long ceramic green sheet (c)
Are cut into predetermined vertical and horizontal dimensions, a plurality of the cut ceramic green sheets (a) are laminated, and the laminate is pressed in the laminating direction of the ceramic green sheets (a) to press the ceramic green sheets (a). In the ceramic green sheet laminating apparatus, a pair of cutters (1) facing each other in a direction orthogonal to a feeding direction of a long ceramic green sheet (c) fed in a longitudinal direction and capable of adjusting an interval.
0) and (10), and the cutters (10) and (1)
0), a first cutting station (1) for cutting the ceramic green sheet c at a predetermined width, and a fixed length feeding in which the feeding length is adjustable and the ceramic green sheet (b) is fed by the adjusted length. A mechanism (2), and a second cutting station (3) for cutting the leading portion of the long ceramic green sheet (b) sent by the fixed amount feeding mechanism (2) by the length sent therefrom; A lamination station (5) for laminating the cut ceramic green sheets (a); and a lamination station (5).
The ceramic green sheets (a) stacked in step (a) are pressed in the stacking direction of the ceramic green sheets (a).
And a crimping station (7) for crimping the ceramic green sheets. 10. A long ceramic green sheet (c) is cut into predetermined vertical and horizontal dimensions, a plurality of the cut ceramic green sheets (a) are laminated, and the laminate is laminated with the ceramic green sheets (a). In a ceramic green sheet laminating apparatus for pressing a ceramic green sheet (a) by pressing in a direction, a cutting width (w) can be adjusted, and a long ceramic green sheet (c) fed in the longitudinal direction at the adjusted width is used. ), And a ceramic green sheet holding head (21) which reciprocates in the longitudinal direction of the cut ceramic green sheet (b) and whose moving stroke is adjustable, The leading portion of the ceramic green sheet b held by the holding head (21) is
A fixed amount feeding mechanism (2) for feeding the reciprocating stroke, and a leading portion of the long ceramic green sheet (b) sent by the fixed amount feeding mechanism (2) is cut by the sent length. A second cutting station (3), a stacking station (5) for stacking the cut ceramic green sheets (a), and a stacking of the ceramic green sheets (a) in the stacking station (5) in the stacking direction. And a pressing station (7) for pressing the ceramic green sheet (a) under pressure. 11. A tray-like platen (56) having a concave portion is conveyed from the laminating station (5) to the pressure-bonding station (7), and the ceramic green sheets a are laminated in the concave portion of the platen (56). The ceramic green sheet laminating apparatus according to any one of claims 7 to 10, wherein the apparatus is laminated. 12. A platen support (57) for placing a platen (56) on the laminating station (5) is arranged,
The ceramic green sheet laminating apparatus according to claim 11, wherein the platen holding table (57) sucks and holds the ceramic green sheet (a) housed in the platen (56) by magnetic attraction means. 13. A platen support (57) for placing a platen (56) on the laminating station (5) is arranged,
The ceramic green sheet laminating apparatus according to claim 11, wherein the platen holding table (57) sucks and holds the ceramic green sheet (a) housed in the platen (56) by vacuum suction means. 14. The ceramic green sheet laminating apparatus according to claim 13, wherein the bottom of the platen (56) is made of a porous material for vacuum suction of the ceramic green sheet (a). 15. A laminating station (5) is provided with a sheet stock stage (61) in which a spacer sheet (e) is stocked, and the sheet stock stage (61) is releasable from the laminating station (5). The ceramic green sheet laminating apparatus according to any one of claims 7 to 14, further comprising a transport mechanism for transporting a certain spacer sheet (e). 16. A long ceramic green sheet (c) is cut into predetermined vertical and horizontal dimensions, a plurality of the cut ceramic green sheets (a) are laminated, and the laminate is laminated with the ceramic green sheets (a). In a ceramic green sheet laminating apparatus for pressing a ceramic green sheet (a) by pressing in a direction, a cutting width (w) can be adjusted, and a long ceramic green sheet (c) fed in the longitudinal direction at the adjusted width is used. ), A cutting station (1), and a cutting length (l) that can be adjusted. A long ceramic green sheet (b) is cut with the adjusted length, and the cut is performed. A second cutting station (3) for stacking the ceramic green sheets (a), and stacking the stacked ceramic green sheets (a) And a pressing station (7) for pressing the ceramic green sheet (a) by pressing in the direction. 17. A long ceramic green sheet (c) is cut into predetermined vertical and horizontal dimensions, a plurality of the cut ceramic green sheets (a) are laminated, and the laminate is laminated with the ceramic green sheets (a). In a ceramic green sheet laminating apparatus for pressing a ceramic green sheet (a) by pressing in a direction, a cutting width (w) can be adjusted, and a long ceramic green sheet (c) fed in the longitudinal direction at the adjusted width is used. ) And the first cutting station (1) for cutting, and the feed length is adjustable,
A fixed amount feeding mechanism (2) for sending the ceramic green sheet (b) by the adjusted length, and a leading portion of the long ceramic green sheet (b) sent by the fixed amount feeding mechanism (2) are sent. And the cut ceramic green sheet (a)
And a crimping station (7) for pressing the stacked ceramic green sheets (a) in the laminating direction to press the ceramic green sheets (a). Ceramic green sheet laminating equipment. 18. A long ceramic green sheet (c) is cut into predetermined vertical and horizontal dimensions, a plurality of the cut ceramic green sheets (a) are laminated, and the laminate is laminated with the ceramic green sheets (a). In a ceramic green sheet laminating apparatus for pressing a ceramic green sheet (a) by pressing in a direction, the ceramic green sheet (a) is opposed in a direction perpendicular to a feeding direction of a long ceramic green sheet (c) fed in a longitudinal direction, and an interval can be adjusted. A pair of cutters (10) and (10);
(10) a first cutting station (1) for cutting the ceramic green sheet c at a predetermined width, and a feeding length adjustable, and a fixed amount for feeding the ceramic green sheet (b) by the adjusted length. A feed mechanism (2);
The second part of cutting the leading portion of the long ceramic green sheet (b) sent by the fixed amount feeding mechanism (2) by the sent length and stacking the cut ceramic green sheet (a). And a pressing station (7) for pressing the stacked ceramic green sheets (a) in the stacking direction and pressing the ceramic green sheets (a). Laminating equipment. 19. A long ceramic green sheet (c) is cut into predetermined vertical and horizontal dimensions, a plurality of the cut ceramic green sheets (a) are laminated, and the laminate is laminated with the ceramic green sheets (a). In a ceramic green sheet laminating apparatus for pressing a ceramic green sheet (a) by pressing in a direction, a cutting width (w) can be adjusted, and a long ceramic green sheet (c) fed in the longitudinal direction at the adjusted width is used. ), And a ceramic green sheet holding head (21) which reciprocates in the longitudinal direction of the cut ceramic green sheet (b) and whose moving stroke is adjustable, The leading portion of the ceramic green sheet b held by the holding head (21) is
A fixed amount feeding mechanism (2) for feeding the reciprocating stroke, and a leading portion of the long ceramic green sheet (b) sent by the fixed amount feeding mechanism (2) is cut by the sent length. At the same time, a second cutting station (3) for stacking the cut ceramic green sheets (a) and pressing the stacked ceramic green sheets (a) in the laminating direction to crimp the ceramic green sheets (a). Crimping station (7)
And a ceramic green sheet laminating apparatus comprising: