JPH0339204A - Processing method of ceramic material - Google Patents

Abstract

PURPOSE:To mass-produce ceramic spacers highly precisely and inexpensively, by a method wherein after fixation of a forced out end part of a vinyl tape stuck to a main surface of a ceramic body to a holding board and cut of a small piece on the other surface is formed down to a depth of at least 90% of a thickness of a ceramic sheet. CONSTITUTION:A vinyl tape 3 is stuck to a main surface of a ceramic sheet whose both surfaces are ground, both sides of the ceramic sheet are forced out from a work 1 and fixed to a magnetic chuck 5 while pressing the work 1 with a block 4. The work 1 is fixed with adhesion of the tape 3 and pressure of the block 4. Then a cut 6 is formed in aimed size into the other side main surface 7 with a cutter. A depth of the cut is made at least 90% of a thickness of the work, especially about 90-95%. then the other main surface 7 is ground, the cut 6 is exposed and divided into small pieces 8 which are in aimed size.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application in Industry] The present invention relates to a method for processing ceramic materials. More specifically, the present invention relates to a method for efficiently cutting out and manufacturing small pieces of ceramics, such as spacers for firing electronic materials, which are fine and require high precision, from a ceramic plate.

[Prior Art] When firing electronic materials such as PLZT, the objects to be fired are arranged on a shelf-like member called a setter, and the setters are stacked and charged into a firing furnace to perform firing. That's what I do. At this time, a spacer is interposed between each setter so that an appropriate gap is left between the setters. As this type of spacer, small pieces such as rod-shaped bodies or pieces made of ceramics are used.

Conventionally, small pieces made of ceramics are often manufactured by press-molding or extrusion molding one by one, cutting the pieces, and then firing them.

[The problem that the invention aims to solve! ] The conventional manufacturing method described above has a problem in that the precision of the small pieces manufactured is low. Furthermore, when processing a fired product to achieve a high-precision finish, the smaller the spacer, the more time and effort it takes, and there is no suitable block for fixing the workpiece. In addition,
For mass production equipment, there are jigs such as vacuum chucks, but these are fairly expensive equipment and are not economically viable.

As described above, processing of relatively small ceramic materials has become unavoidable due to high costs.

The present invention does not require large-scale equipment and can be done using existing equipment.
It is an object of the present invention to provide a method for efficiently manufacturing spacers at low cost.

[Means for Solving the Problems] The present invention provides a method for manufacturing a large number of small pieces by processing a ceramic plate, in which a vinyl tape is attached to one main surface of a ceramic body, and an edge of the vinyl tape is attached to one main surface of a ceramic body. After protruding from the ceramic plate and fixing this protruding part to the holding plate, make a cut corresponding to the size of the small piece to be cut out from the other side to a depth of at least 90% of the thickness of the ceramic plate. The ceramic plate was then peeled off from the holding plate, a vinyl tape was affixed to the other main surface, the end of the vinyl tape was allowed to protrude from the ceramic plate, and this protruding part was fixed to the holding plate. After that, the other main surface is ground, and this grinding is performed until the cut appears on the other main surface, thereby dividing the ceramic plate into small pieces.

[Function] The processing method of the present invention will be explained in detail together with its function as follows.

First, if necessary, both the top and bottom of a ceramic flat plate (hereinafter referred to as the work) are polished, and vinyl tape is attached to one main surface.

At this time, the end of the vinyl tape is allowed to protrude from the workpiece, and this protruding portion is fixed onto a holding plate such as the base of a magnetic chuck of a surface grinder using an iron block or the like.

Next, a cut to an appropriate size is made using a cutter or the like, but at this time, 10% or less of the thickness of the workpiece, preferably 5 to 10%, is left uncut.

Next, the workpiece is removed from the holding plate, a similar vinyl tape is applied to the other main surface, and the workpiece is similarly fixed on a holding plate such as the base of a magnetic chuck with a block or the like.

Subsequently, the other main surface is ground by the amount left uncut to expose the cuts on the other main surface, thereby dividing the flat ceramic into small pieces. According to the method of the present invention, the size of the small beads can be up to 0.5 mm square in a cubic shape.

(If the size is less than 0.5 mm square, the workpiece will move during grinding due to the relationship between the adhesive strength of the tape and the adhesion area of the workpiece, and it is often difficult to fix it.) For prismatic shapes, the aspect ratio is 2.
The following can be easily manufactured.

The vinyl tape used in the present invention may be commercially available, and the tape material is preferably a hard material with a thickness of about 0.1 mm.

According to the present invention, it is possible to process ceramic plates up to a maximum size of about 200 mm x 150 mm.

[Example] Examples will be described below with reference to the drawings.

In the method of this embodiment, first both sides of the ceramic plate (work) 1 are ground. In addition, at this time, one main surface 2 may be ground to the extent that the tape is attached.

Next, as shown in FIG. 1, a vinyl tape 3 is applied to the main surface of the - side so that both sides protrude from the workpiece 1, and the workpiece 1 is fixed to the magnetic chuck 5 while being held down by the block 4. Work 1 uses the adhesive strength of tape 3 and block 4.
It is fixed by the pressure of

Next, as shown in Fig. 2, a cut 6 is made on the other main surface 7 to the desired size (external dimensions) using a cutter. Depending on the shape of the small piece to be manufactured, a cut 6 can be made in various shapes such as cubic or rectangular. (see Figures 3 (a), (b), and (C)), the depth of cut should be at least 90% of the workpiece thickness, especially 9.
0 to 95%.

Next, remove the workpiece 1 from the magnetic chuck 5,
The other main surface 7 is fixed to the magnetic chuck 5 with the vinyl tape 3 and the block 4 (Fig. 4), and then the other main surface 7 is ground as shown in Fig. 5, so that the notches 6 are It should be exposed on the main surface 7. As a result, the work l is divided into small pieces (for example, spacers) 8 having the desired dimensions.

By peeling off this small piece 8 from the vinyl tape 3, a product such as a spacer can be obtained.

According to this method, it is possible to cut out cubes up to 0.5 mm square. The size of the workpiece is usually about 10100mm x 150mm, so in the case of a 5mm square spacer, 6
00 pieces can be easily manufactured with high precision.

[Effects of the Invention] According to the method of the present invention, the Cerayu Tutus spacer can be manufactured with high precision.
It can be mass-produced at low cost. This manufacturing does not require any special jigs and the working equipment is simple.

[Brief explanation of drawings]

Each of FIGS. 1 to 5 is an explanatory diagram of an embodiment method. 1... Ceramic plate (work), 3... Vinyl tape, 4... Block, 5... Magnetic chuck, 6... Notch, 8... Small piece.

Claims (1)

[Claims] In the method of manufacturing a large number of small pieces by processing a ceramic plate, a vinyl tape is pasted on one main surface of the ceramic body, the end of the vinyl tape is made to protrude from the ceramic plate, and this protruding part is After fixing it to the holding plate, make a cut corresponding to the size of the small piece to be cut out from the other side.
% or more in depth, then peel off the ceramic plate from the holding plate, attach vinyl tape to the other main surface, let the end of this vinyl tape protrude from the ceramic plate, and remove this protruding part. After fixing to a holding plate, the other main surface is ground, and the grinding is performed until the notch appears on the other main surface, thereby dividing the ceramic plate into small pieces. Processing method.