JPH0581404B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and an apparatus for cutting green sheets to a predetermined size and laminating them.

[Prior Art] In the manufacturing process of laminated ceramic capacitors and multilayer wiring boards, green sheets on which electrodes and circuit wiring are printed in a predetermined pattern are cut and laminated. An example of this process will be explained with reference to FIGS. 3 and 4.

A green sheet 2 is placed on a long Chiaria tape 1 made of polyethylene terephthalate film, etc.
The two-layer tape on which is formed is fed out from a supply roll 3, passed through a tension roll 4 for tension adjustment, and then the green sheet 2 is peeled off from the Chiaria tape 1 by a separation roll 5. Thereafter, the Chiaria tape 1 is wound onto a winding roll 7 via a tension roll 6. The green sheet 2 separated from the Chiaria tape 1 is placed on the Chiaria belt 8, where it is cut into a predetermined shape by a cutting suction unit 11, and is conveyed to another stacking area 12 where it is stacked. The blank sheet 2a after being cut is stored in a blank container 10.

FIG. 5 shows a laminated ceramic capacitor as an example of a product manufactured from a laminated body obtained using such a cutting and laminating apparatus. In this multilayer ceramic capacitor, as shown in FIG. 5, dielectric ceramic layers 20a and 20b each having internal electrodes 22a and 22b shifted left and right are laminated alternately, and ceramic layers 21 without internal electrodes are further crimped on both sides of the dielectric ceramic layers 20a and 20b. A ceramic laminated chip 24 is used. External electrodes 23a and 23b are formed at both ends of the laminated chip 24 so as to contact the internal electrodes 22a and 22b exposed on both end faces of the laminated chip 24, respectively.

When manufacturing the above-mentioned laminated chips 24, in order to increase productivity through mass production, a method is used in which multiple laminated chips are laminated at once and then cut into individual laminated chips 24. is taken. In order to manufacture a stack of green sheets before being separated as unfired stacked chips 24, an electrode pattern is printed on the green sheet 2 in advance according to the order of cutting and stacking, and the cutting and stacking are carried out by This was carried out linearly using the apparatus shown in FIGS. 3 and 4 above.

To explain this process more specifically, taking as an example the case of manufacturing the multilayer chip 24 for the multilayer ceramic capacitor, as shown in FIG. ,
Green having parts where A electrode patterns a for forming internal electrodes 22a and B electrode patterns b for forming internal electrodes 22b are printed alternately, and further parts where electrode patterns a and b are not printed. Sheet 2 is used and this is the supply roll 3
It is supplied from the side to the cutting suction unit 11 side. In this cutting suction unit 11, first, the portion of the green sheet 2 where the electrode patterns a and b are not printed is cut and suctioned, and this is conveyed to the cutting area 12 and placed there. This is repeated an appropriate number of times, and several layers of green sheets without electrode patterns a and b are laminated. Subsequently, the part where the A electrode pattern a is printed and the part where the B electrode pattern b is printed are alternately cut and sucked to form the laminated area 1.
2, several layers are laminated. Next, the parts where the electrode patterns a and b are not printed are cut and sucked,
Several layers of this are laminated in the lamination area 12. In addition,
When stacking, the green sheets of each layer are brought into close contact with each other by means such as pressure bonding or thermocompression bonding. Thereafter, this laminate is sent to the discharge area 13, from where it is discharged to the next process. Then, in the next step, the laminate is cut to obtain unfired laminate chips for constructing individual laminate ceramic capacitors.

The multilayer ceramic capacitor already explained with reference to FIG. 5 has the most common electrode structure, but if you want to manufacture one with the same shape and a lower capacitance using the same green sheet, An internal electrode 22 is located in the middle of the laminated chip 24.
An electrode structure is adopted in which a ceramic layer 21 without a and 22b is interposed. When manufacturing such a multilayer ceramic capacitor, the method is basically the same as that described above, but in this case, the green sheet 2 supplied from the supply roll 3 to the cutting suction unit 11 side has its electrode pattern a, The printing order of b is different. That is, a green sheet is used in which there is a portion where electrode patterns a and b are not printed at all between portions where the A electrode pattern a and the B electrode pattern b are printed alternately.

[Problems to be Solved by the Invention] In the conventional method for manufacturing a laminate as described above, a green sheet is printed with electrode patterns a and b in a predetermined order according to the electrode structure of the multilayer ceramic capacitor to be manufactured. 2 must be supplied from the supply roll 3 side. For this reason, it is possible to manufacture only multilayer ceramic capacitors with a certain electrode structure from a green sheet on which electrode patterns a and b are printed in a predetermined order, and it is not possible to manufacture multilayer ceramic capacitors with other electrode structures. I couldn't do it. For this reason,
When producing multiple types of laminated ceramic capacitors in small quantities with different electrode structures, it is necessary to replace the supply roll 3 of the ceramic sheet 2 each time, which is time-consuming and extremely disadvantageous in terms of improving productivity. It was hot.

Furthermore, even in the printing process before the cutting and laminating process of printing the electrode patterns a and b on the ceramic sheet 2, the printing order of the electrode patterns a and b must be changed for each green sheet 2, so the setup is complicated. It takes a lot of work,
There was an issue of poor productivity.

SUMMARY OF THE INVENTION In view of the problems of the conventional green sheet cutting and laminating method and apparatus, an object of the present invention is to provide a green sheet cutting and laminating method and apparatus that can solve the problems.

[Means for Solving the Problems] That is, in order to achieve the above object, the present invention firstly cuts the green sheets 2 that are sequentially supplied and conveys them to another stacking area 12. In the method of stacking the cut green sheets by repeating the above steps, the green sheets 2 are cut in an arbitrary order from a plurality of green sheet supply lines 15a, 15b..., and these cut green sheets are stacked in one stacking area 12. To provide a method for cutting and laminating green sheets in which green sheets are sequentially laminated.

Second, means for supplying the green sheet 2;
A cutting adsorption unit 11 that cuts the supplied green sheet 2 into a predetermined shape and adsorbs it, a green sheet supply means, and a stacking area 1 of the green sheet 2.
In the green sheet cutting and stacking apparatus equipped with a means for moving the cut suction unit 11 between the cut suction unit 11 and the green sheet 2, the means for supplying the green sheets 2 is provided with a plurality of green sheet supply lines 15a, 15b, . The means of moving
Each green sheet supply line 15a, 15b
To provide a green sheet cutting and stacking device comprising a means for moving green sheets 2 between... and a stacking area 12 of green sheets 2.

[Operation] In the green sheet cutting and stacking method and apparatus described above, a plurality of green sheet supply lines 15a, 1
5b... is used, for example, the first supply line 15a, the second supply line 15b, and even the third supply line 15c are printed with different electrode patterns a and b, or these electrode patterns are printed. By cutting the green sheets 2 while selecting them in an appropriate order from each of these supply lines 15a, 15b, etc., and laminating them sequentially, any electrode pattern a, b can be formed.
A laminate of green sheets 2, 2, .

Therefore, in order to obtain a laminate in which the order of stacking the electrode patterns a and b is different, there is no need to replace the green sheet on the supply roll 3 each time, and it is only necessary to change the cutting, cutting by the suction unit 11, and stacking order. Be able to respond. In addition, in the previous printing process of electrode patterns a and b, there is no need to print multiple types of electrode patterns a and b in different printing orders, and the A electrode pattern a and the B electrode pattern b can be printed alternately. green sheet 2,
A green sheet 2 on which only the A electrode pattern a is printed and a green sheet 2 on which only the B electrode pattern b is printed are prepared, and these are supplied to each supply line 15a, 15b together with the green sheet 2 on which no electrode pattern is printed. By simply setting and using it, a multilayer chip with any electrode multilayer structure can be obtained.

[Example] Next, an example of the present invention will be specifically described with reference to the drawings.

First, FIG. 1 shows a first embodiment of the present invention, in which a green sheet 2 supply line 1 is shown.
Two units of 5a and 15b are used. That is,
From the supply roll 3 to the blank container 10 and the take-up roll 7, as already explained with reference to FIGS.
The supply line 15a, 1 of the green sheet 2 leading to
5b are arranged in parallel, and each of these supplies a separate green sheet 2,2.

Only one cutting and suction unit 11 is used for cutting and suctioning the green sheet 2 in the cutting area of these supply lines 15a and 15b. This is then connected to the two supply lines 15 by the drive mechanism 14.
It moves arbitrarily between a total of four workstations: each of the cutting areas a and 15b, the stacking area 12, and the discharge area 13, stops at a predetermined position at each workstation, and cuts the green sheet 2. Adsorption, stacking of cut green sheets, and discharge of the stacked green sheets are performed respectively.

Using this apparatus, the method of cutting and laminating green sheets according to the present invention is carried out as follows. For example, as shown in FIG. 1, a green sheet 2 on which A electrode pattern a and B electrode pattern b are alternately printed is supplied from the first supply line 15a.
A green sheet 2 on which no electrode pattern is printed is supplied from the second supply line 15b. Then, by the cutting suction unit 11,
First, the green sheet 2 of the second supply line 15b
is cut and adsorbed, and transported to the stacking area 12 and placed there. By repeating this process an appropriate number of times, green sheets 2 without electrode patterns are laminated in the lamination area. Subsequently, the first supply line 15
From a, a portion having the A electrode pattern a and a portion having the B electrode pattern b are alternately cut and suctioned, and then laminated one after another in the lamination area 12. Next, cut the green sheet 2 of the second supply line 15b again,
They are adsorbed and sequentially stacked in the stacking area 12. Thereafter, this stack of green sheets is conveyed by the stack adsorption unit 11 to the discharge area 13, and from there is sent to the next process (not shown). Laminated chips 24 obtained by dividing this laminate into individual chips are
It has the electrode structure shown in the figure.

On the other hand, for example, a multilayer chip 2 as shown in FIG.
4, instead of cutting and laminating the green sheets 2 from the first supply line 15a,
The green sheets 2 may be cut and laminated from the second supply line 15b.

In this way, by selecting the supply lines 15a and 15b for cutting and laminating the green sheets 2 at any time, it is possible to manufacture laminated chips having various electrode structures. This selection is generally made continuously and automatically by program control or sequence control of the drive mechanism 14 that drives the cutting and suction unit 11 that cuts, suctions, and transports the green sheet 2.

Next, the embodiment shown in FIG. 2 is a cutting and laminating apparatus in which the green sheet 2 has three supply lines 15a, 15b, and 15c. By increasing the number of supply lines 15c by one compared to the embodiment shown in FIG.
When using this device, A electrode pattern a and B
Green sheets 2, 2 with electrode pattern b printed on them
can be supplied on separate lines. Although this makes the control of the cutting adsorption unit 11 more complicated,
On the other hand, greater flexibility is obtained.

In the above explanation, for convenience of explanation, the explanation has been limited to the production of multilayer chips for multilayer ceramic capacitors. However, the present invention also applies to the cutting and lamination process of other products from which ceramic laminates are obtained, such as the production of multilayer wiring boards. It can also be applied to cutting and laminating processes. Since the multilayer wiring board has more diverse wiring patterns in place of the electrode patterns a and b, the effects of the present invention can be achieved by providing more supply lines 15a, 15b, etc. of the green sheet 2 than in the manufacturing process of the multilayer ceramic capacitor. can be obtained in the same way.

[Effects of the Invention] As explained above, according to the present invention, regardless of the printing order of the printing pattern on the green sheet 2, various types of printing can be performed by selecting the green sheet supply lines 15a, 15b, . . . in the cutting suction unit 11. It is possible to manufacture a laminate having a laminate structure. Also,
There is no need to prepare several types of green sheets 2 with different printing orders of print patterns, and it is sufficient to prepare at most as many green sheets as the types of print patterns, and the printing process can also be simplified. As a result, it is possible to realize an efficient production means suitable for high-mix, low-volume production.

[Brief explanation of the drawing]

1 and 2 are plan views of a green sheet cutting and laminating apparatus showing each embodiment of the present invention, and FIG.
FIG. 4 is a plan view showing a conventional example of a green sheet cutting and stacking device, FIG. 4 is a side view of the same device, and FIGS. FIG. 3 is a cross-sectional view showing an example of the electrode structure of a manufactured multilayer ceramic capacitor. 2... Green sheet, 11... Cut suction unit, 12... Lamination area, 14... Drive mechanism of cut suction unit, 15a, 15b, 15c... Green sheet supply line.

Claims (1)

[Claims] 1. Cutting green sheets 2 that are sequentially supplied,
By repeating this process of conveying and placing the green sheets in another stacking area 12, the green sheets 2 can be cut in any order from the plurality of green sheet supply lines 15a, 15b, etc. in the method of stacking the cut green sheets. A green sheet cutting and stacking method characterized by sequentially stacking these cut green sheets in one stacking area 12. 2 A means for supplying the green sheet 2, a cutting suction unit 11 that cuts the supplied green sheet 2 into a predetermined shape and adsorbs it, and the above-mentioned cutting between the green sheet supply means and the green sheet stacking area 12. In a green sheet cutting and stacking apparatus equipped with a means for moving the suction unit 11, the means for supplying the green sheet 2 is provided with a plurality of green sheet supply lines 15a, 15b..., and the means for moving the cutting suction unit 11 is provided with a plurality of green sheet supply lines 15a, 15b... A green sheet cutting and stacking device comprising a means for moving green sheets 2 between the green sheet supply lines 15a, 15b and a stacking area 12.