JP2003209031A - Cutting device and cutting method of ceramic block body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutting device and a cutting method of a ceramic body capable of efficiently cutting the ceramic block body. <P>SOLUTION: The cutting device 10 is substantially constituted of a work supply tray 51, a transfer device (not shown in a figure), a preheating table 11, a cutting table 54 and a cutting blade 55. The cutting blade 55 cuts the ceramic block body 53 disposed on the cutting table 54. The transfer device sequentially transfers the ceramic block body 53 from the work supply tray 51 as shown by an arrow sign K1 and disposes the block body on the preheating table 11. A preheating heater 12 is embedded in the table surface 11a of the preheating table 11. The ceramic block body 53, preheated on the preheating table 11, is transferred again tot the cutting table 54 by the transferring device. A heater 56 for heating the ceramic block body 53, is embedded in the table surface 54a of the cutting table 54. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device and a cutting method for a ceramic block body used for manufacturing a ceramic electronic component such as a laminated ceramic capacitor.

[0002]

2. Description of the Related Art Manufacturing of a ceramic electronic component such as a monolithic ceramic capacitor is performed as follows, for example. Ceramic green sheets on which a predetermined conductor pattern is formed are stacked and pressed by a method such as printing to form a ceramic block body. Next, the ceramic block body is shear cut into a laminated ceramic chip having a predetermined size. The monolithic ceramic chip thus cut is sintered in a firing furnace, and then a terminal electrode or the like is formed to be a ceramic electronic component.

Conventionally, as a cutting device for a ceramic block body, a device as shown in FIG. 4 is generally known (see, for example, Japanese Patent Laid-Open No. 2000-269104).
The cutting device 50 generally includes a work supply tray 51, a transfer device (not shown), a cutting table 54, and a cutting blade 55. The cutting blade 55 is driven in the direction indicated by the arrow A by a driving device (not shown) to shear-cut the ceramic block body 53 placed on the cutting table 54. The carrier device, as indicated by arrow K,
The ceramic block body 53 is sequentially conveyed from the work supply tray 51 and placed on the cut table 54. The heater 5 is provided on the table surface 54a of the cut table 54.
6 is buried. The heater 56 heats the ceramic block body 53 to a temperature not lower than the glass transition temperature of the binder contained in the ceramic block body 53,
The cuttability of the ceramic block body 53 was improved.

[0004]

However, in the conventional cutting device 50, the ceramic block body 53 conveyed to the cutting table 54 is heated by the heater 56 of the cutting table 54 before cutting. For this reason,
Until the ceramic block body 53 reaches a predetermined temperature,
While waiting for heating occurs, the ceramic blade 53 cannot be cut by the cutting blade 55 during that time.
Had a problem of low operating rate.

Therefore, an object of the present invention is to provide a cutting device and a cutting method for a ceramic block body which can efficiently cut the ceramic block body.

[0006]

In order to achieve the above object, a ceramic block body cutting apparatus according to the present invention conveys a ceramic block body onto a cutting table and cuts it with a cutting blade while heating the ceramic block body. And a preheating means for preheating a ceramic block body conveyed on a cutting table.

As the preheating means, for example, a preheating heater (using conduction) arranged on a preheating table, an atmosphere heating device (using convection) for heating the atmosphere around the ceramic block body, or a ceramic block. There is an infrared heating device that heats the body (using radiation).

Further, the method for cutting a ceramic block body according to the present invention is a cutting method in which the ceramic block body is conveyed onto a cutting table and is cut by a cutting blade while heating the ceramic block body. Preheat before being transported on the cutting table. The temperature difference between the preheating temperature and the heating temperature is preferably 20 ° C. or less.

[0009]

The ceramic block body is preheated by the preheating means before being cut by the cutting blade. As a result, the temperature of the ceramic block body conveyed to the cut table is rising, and the glass transition point temperature of the binder of the ceramic block body is exceeded by only slightly heating the ceramic block body on the cut table.
Therefore, the waiting time for heating the ceramic block body required for cutting is shortened.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a cutting device and a cutting method for a ceramic block body according to the present invention will be described below with reference to the accompanying drawings. As the ceramic block body, a mother substrate of a multilayer capacitor will be described as an example, but it goes without saying that it may be a multilayer inductor, a multilayer LC filter or a high frequency module, a mother substrate of a multilayer device, a multilayer substrate, or the like.

[First Embodiment, FIG. 1] As shown in FIG. 1, the cutting device 10 is roughly composed of a work supply tray 51,
The transport device (not shown), the preheating table 11, the cutting table 54, and the cutting blade 55 are included. The cutting blade 55 is driven in a direction indicated by an arrow A by a driving device (not shown) to cut the ceramic block body 53 placed on the cutting table 54. The cutting blade 55 has a wall thickness of 0.1 to 0.5 mm (representative value: 0.2 mm) and a tip angle of the blade tip of 5 to 20 degrees (representative value: 5 degrees). The material of the cutting blade 55 is carbide, SK (carbon tool steel), SUS
(Stainless steel) or the like is used.

The carrier device sequentially carries the ceramic block bodies 53 from the work supply tray 51 and places them on the preheating table 11, as indicated by the arrow K1. A preheating heater 12 is embedded in the table surface 11 a of the preheating table 11. The preheater 12 is provided near the glass transition temperature of the binder contained in the ceramic block body 53.
The ceramic block body 53 is heated. Preheating table 1
The temperature setting of 1 is a temperature at which the solvent or the like of the ceramic block body 53 does not evaporate during preheating. This is because if the solvent or the like is completely evaporated from the ceramic block body 53, the ceramic block body 53 becomes hard and shear cutting becomes difficult. If you give a specific numerical example,
The heating temperature on the preheating table 11 is 85 to 95 ° C., and the heating time is about 1 to 2 minutes. As a preheating method, the preheating heater 12 may be applied to the upper surface of the ceramic block body 53, or may be applied to both upper and lower surfaces.

The ceramic block body 53 preheated by the preheating table 11 is again conveyed to the cutting table 54 by the conveying device as shown by an arrow K2. A heater 56 for heating the ceramic block body 53 is also embedded in the table surface 54a of the cut table 54.
The heater 56 further heats the ceramic block body 53 to heat the ceramic block body 53 to the glass transition temperature of the binder or higher. This improves the cuttability of the ceramic block body 53 by the cutting blade 55. If a specific numerical example is shown, the heating temperature on the cut table 54 is 100 to 150 ° C.

The temperature difference between the preheating temperature and the heating temperature is preferably 20 ° C. or less. By keeping the temperature difference below 20 ° C, the excess solvent is evaporated in advance and
By improving the plasticity of the binder and the adhesive strength between the ceramic layers, it is possible to prevent stacking misalignment during cutting. In addition, more preferably, the temperature difference between the preheating temperature and the heating temperature is 10 ° C. or less.

As described above, while the ceramic block body 53 placed on the cut table 54 is shear-cut, the ceramic block body 53 to be cut next is cut.
Are heated on the preheating table 11. Therefore, the ceramic block body 5 conveyed to the cut table 54
The temperature of No. 3 has already risen, and the ceramic block body 53 is heated to a temperature above the glass transition temperature of the binder in a short time only by slightly heating the ceramic block body 53 on the cut table 54. As a result, the waiting time for heating required when cutting the ceramic block body 53 is shortened, and the operating rate of the equipment is improved.

[Second Embodiment, FIG. 2] As shown in FIG. 2, the cutting device 20 is roughly composed of a work supply tray 51,
The transport device (not shown), the atmosphere heating device 21, the cutting table 54, and the cutting blade 55 are included.

As shown by the arrow K1, the transport device sequentially transports the ceramic block bodies 53 from the work supply tray 51 and temporarily stores them in the atmosphere heating device 21. Hot air circulates in the atmosphere heating device 21. The atmosphere heating device 21 preheats the ceramic block body 53 to near the glass transition temperature of the binder contained in the ceramic block body 53. The temperature of the atmosphere heating device 21 is set to a temperature at which the binder or the like of the ceramic block body 53 does not evaporate completely during preheating.

The ceramic block body 53 preheated by the atmosphere heating device 21 is again conveyed to the cut table 54 by the conveying device as indicated by the arrow K2. The heater 56 of the cut table 54 further heats the ceramic block body 53, and heats the ceramic block body 53 to the glass transition temperature of the binder or higher. This allows
The cutting property of the ceramic block body 53 by the cutting blade 55 is improved. In FIG. 2, parts corresponding to those in FIG. 1 are designated by the corresponding reference numerals, and duplicate description will be omitted.

As described above, while the ceramic block body 53 placed on the cut table 54 is shear-cut, the ceramic block body 53 to be cut next is cut.
Is heated by the atmosphere heating device 21, the waiting time for heating is shortened and the operating rate of the equipment is improved.

[Third Embodiment, FIG. 3] As shown in FIG. 3, the cutting device 30 is roughly composed of a work supply tray 51,
The transport device (not shown), an infrared heating device 31, a cutting table 54, and a cutting blade 55 are included.

As shown by the arrow K1, the transport device sequentially transports the ceramic block body 53 from the work supply tray 51 and temporarily stores it in the infrared heating device 31. The infrared heating device 31 includes an infrared heater 32. The infrared heating device 31 irradiates the ceramic block body 53 with infrared rays to preheat the ceramic block body 53 to near the glass transition temperature of the binder. Since the infrared ray has a high absorption efficiency, the ceramic block body 53 is used as the infrared heating device 3
Infrared rays from 1 are efficiently absorbed and the whole is preheated, the preheating time of the ceramic block body 53 is shortened, and the operating efficiency of the equipment can be further improved. The temperature of the infrared heating device 31 is set to a temperature at which the solvent or the like of the ceramic block body 53 does not evaporate during preheating.

The ceramic block body 53 preheated by the infrared heating device 31 is again conveyed to the cut table 54 by the conveying device as shown by an arrow K2. The heater 56 of the cut table 54 further heats the ceramic block body 53, and heats the ceramic block body 53 to the glass transition temperature of the binder or higher. This allows
The cutting property of the ceramic block body 53 by the cutting blade 55 is improved. In addition, in FIG. 3, parts corresponding to those in FIG. 1 are denoted by corresponding reference numerals, and redundant description will be omitted.

As described above, while the ceramic block body 53 placed on the cut table 54 is shear-cut, the ceramic block body 53 to be cut next is cut.
Is heated by the infrared heating device 31, the waiting time for heating is shortened and the operating rate of the equipment is improved.

[Other Embodiments] The present invention is not limited to the above embodiments, but can be variously modified within the scope of the gist thereof. For example, the heating of the ceramic block body 53 on the cut table 54 may be omitted. The ceramic block body of the member to be cut may be in a non-fired state or a sintered state.

Further, according to the present invention, in addition to forming the ceramic block body 53 by laminating and pressure-bonding the ceramic green sheets, the process of forming a necessary conductive pattern on the ceramic block after applying and drying the ceramic slurry is repeated. The present invention can also be applied to those that form a ceramic block body.

Further, the ceramic block body may be composed of one ceramic layer, or may be composed of a plurality of laminated ceramic layers. The ceramic block body incorporates internal circuit patterns corresponding to various electronic components.

[0027]

As is apparent from the above description, according to the present invention, since the ceramic block body is preheated by the preheating means before being cut by the cutting blade, it is conveyed to the cutting table. The temperature of the ceramic block body has risen, and when the ceramic block body is heated a little when cutting with the cutting blade, the temperature of the ceramic block body rises above the glass transition temperature of the binder. The waiting time for heating the ceramic block body required for the above is shortened, and the operating rate of the equipment can be improved.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a first embodiment of a cutting device for a ceramic block body according to the present invention.

FIG. 2 is a schematic configuration diagram showing a second embodiment of a cutting device for a ceramic block body according to the present invention.

FIG. 3 is a schematic configuration diagram showing a third embodiment of a cutting device for a ceramic block body according to the present invention.

FIG. 4 is a schematic configuration diagram showing a conventional ceramic block cutting device.

[Explanation of symbols]

10, 20, 30 ... Cutting device 11 ... Preheating table 12 ... Preheater 21 ... Atmosphere heating device 31 ... Infrared heating device 53 ... Ceramic block body 54 ... Cut table 55 ... Cutting blade 56 ... Heater

Claims (6)

[Claims] 1. A ceramic block body cutting device that conveys a ceramic block body onto a cut table and cuts the ceramic block body with a cutting blade while heating the ceramic block body, wherein the ceramic block body conveyed onto the cut table is preheated. A device for cutting a ceramic block body, comprising: 2. The cutting device for a ceramic block body according to claim 1, wherein the preheating means includes a preheating table on which the ceramic block body is placed, and a preheating heater arranged on the preheating table. . 3. The cutting device for a ceramic block body according to claim 1, wherein the preheating means is an atmosphere heating device for heating an atmosphere around the ceramic block body. 4. The cutting device for a ceramic block body according to claim 1, wherein the preheating means is an infrared heating device for heating the ceramic block body. 5. A cutting method in which a ceramic block body is conveyed onto a cut table and is cut by a cutting blade while heating the ceramic block body, wherein the ceramic block body is preheated before being conveyed onto the cut table. A method of cutting a ceramic block body, which is characterized in that 6. The method for cutting a ceramic block body according to claim 5, wherein the temperature difference between the preheating temperature and the heating temperature is 20 ° C. or less.