JPH0329128Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a ceramic sheet dividing device in which dividing grooves in the form of a parallel grid extending in the horizontal and vertical directions are provided on the surface.

Ceramic substrates used as insulating substrates for ICs, LSIs, and other electrical components are usually formed using a doctor blade method or a rolling method. It was made by cutting a ceramic sheet (see FIG. 1), which was obtained by cutting grooves and then firing them, into a large number of small pieces by shearing them along the grooves. In the past, this division work was done by directly breaking by hand or using a hand punch, etc., which resulted in problems such as poor division, easy breakage, and unusable products, resulting in very low yields. .

On the other hand, a glass plate is made by making multiple score lines on the surface of the glass plate in either the horizontal or vertical direction, and transporting it on a belt conveyor while passing through a roll gap with an arbitrary curvature. A device was developed in 1973 to automatically divide the material into many strips by curving it and applying shear stress along the cut line.
This device is disclosed in Japanese Utility Model Publication No. 30049 and Japanese Utility Model Publication No. 52-13333, and is well known, but it is intended for dividing a glass plate having a score line in one direction, and it can be divided either vertically or horizontally. The method can only be divided in one direction, and therefore, when dividing a ceramic sheet with dividing grooves in the form of a parallel lattice, which is the subject of the invention, it has the disadvantage that it must be divided into two parts. While the glass plate is placed on the belt conveyor and transferred to the dividing rollers, there is a risk that the glass plate may shift or move diagonally due to the vibration or rocking of the drive motor, which may impair the dividing accuracy. The glass plate dividing apparatus having the present invention could not be applied to ceramic plates for electronic components, which require high precision, such as the present invention described below.

In view of the above-mentioned problems, the present invention aims to provide an apparatus that can divide a ceramic sheet having dividing grooves in two different directions, such as parallel grid dividing grooves, at one time.The drawings will be described below.

1 is a base; 2 and 2' are lower belt rollers pivoted on both ends of the base 1; 3 and 3' are inner belt rollers 2 and 2' and are pivoted above the belt rollers; The upper belt rollers 4 and 5 are first and second endless belts made of silicone rubber or the like wrapped around the lower rollers 2, 2' and the upper rollers 3, 3' with appropriate tension, The respective feed-side sliding bands are opposed to each other with a predetermined gap t depending on the thickness of the ceramic sheet, which will be described later. The upper and lower rollers 2, 2', 3, 3' and the first and second endless belts 4, 5 constitute a conveying element. Reference numeral 6 denotes a ceramic sheet (see Fig. 1) having dividing grooves 6a, 6b, .
The second endless belts 4 and 5 are conveyed in the direction of the arrow while being held in the opposing gap t between the sending side sliding bands. During this transfer process, the sheet is cut into a large number of unit pieces 6c by a curved roller and three rollers, which will be described later. 7 is a curved roller pivoted on the front side between the lower belt rollers 2, 2' and the upper belt rollers 3, 3', and is composed of an upper concave roller 7a and a lower convex roller 7b, and each roller 7a, The sliding curved surfaces 7b are in contact with the outer surfaces of the feeding side sliding bands of the endless belts 4 and 5, respectively. This curved roller 7 applies shearing stress along the horizontal dividing grooves 6a carved on the surface of the ceramic sheet 6.
Reference numeral 8 designates three rollers that are also pivoted on the rear stage side, and are composed of upper two presser rollers 8a, 8b and lower receiving roller 8c, and each roller 8a, 8b,
The sliding surface 8c is in contact with the outer surface of the feeding side sliding band of the endless belts 4 and 5. These three rollers 8 further apply shear stress to the horizontally divided sheet 6 sent out from the curved roller 7 along the vertical dividing grooves 6b.

In the figure, 9 is a drive motor connected to one roller 2' of the lower belt rollers via a chain 10, 11 is a chute for continuously supplying a plurality of ceramic sheets 6 between the belts, 12 is a lateral direction, This is a chute for collecting into a container 13 a large number of ceramic pieces 6c, which have been divided in the longitudinal direction.

According to the apparatus of the present invention, when the ceramic sheet 6 is fed from the chute 11 with the surface with the dividing grooves 6a and 6b facing upward, the ceramic sheet 6 is immediately attached to the first and second endless belts 4 and 5. Because it is held in the gap t between the facing surfaces of the feed-side sliding band, it is reliably transferred in the direction of the arrow in its held state without being displaced or diagonally fluctuated due to vibration or rocking by the drive motor. During this transfer process, firstly, the ceramic sheet 6 is fed between the concave roller 7a and the convex roller 7b of the curved roller 7, as shown in FIG.
As shown in Fig. 3, the ceramic sheet is curved in the same direction as the conveying direction, and therefore, among the parallel grid-like dividing grooves carved on the surface of the ceramic sheet, shear stress is applied along the horizontal dividing grooves 6a. disconnected. Next, this divided sheet is transferred to the presser roller 8 of the three rollers.
a, 8b and the receiving roller 8c, it becomes curved in the direction perpendicular to the conveying direction, as shown in FIG. Cut due to stress. These curved rollers 7 and three rollers 8
A large number of ceramic pieces 6c, which have been continuously divided into horizontal and vertical dividing grooves, are stored in a container 13 through a chute 12 and transferred to the next process.

In the above-mentioned dividing device, when the ceramic sheet is to be served with the surface with dividing grooves facing downward, the concave roller and convex roller of the curved roller and the presser roller and receiving roller of the three rollers are turned upside down. Further, the front and rear stages of the curved roller and the three rollers may be reversed. Furthermore, although not shown in the drawings, by arranging the convex roller of the curved roller and the receiving roller of the three rollers so that they can move up and down, excessive shearing stress on the ceramic sheet can be prevented and a constant stress can always be applied. be.

As described above, this is an apparatus for dividing a ceramic sheet into a large number of small pieces, the surface of which is carved with dividing grooves in the form of a parallel grid extending in the horizontal and vertical directions. The curved roller is composed of a convex roller and a concave roller, and when the ceramic sheet passes between the rollers, it is divided along the horizontal dividing groove, and the three rollers are divided into two. It is composed of a holding roller and one receiving roller, and when the ceramic sheet passes between the rollers, it is divided along the vertical dividing groove and a large number of divided ceramic pieces are discharged from the other end of the conveying element. According to the dividing device of the present invention configured as above, it not only significantly improves mass productivity compared to the conventional manual dividing method or known dividing devices that can only divide in one direction, but also improves the productivity of ceramic sheets. From supply to division process,
Until the ceramic pieces are discharged after the division, the first,
Since it is tightly held by the second endless belt, the ceramic sheet will not shift or move diagonally during transportation. Therefore, it is possible to divide the substrate with high precision, which has the great effect of greatly improving the yield and providing ceramic substrates of excellent quality at low cost.

[Brief explanation of the drawing]

Fig. 1 shows a ceramic sheet shown to explain the present invention, Fig. 2 shows a ceramic sheet dividing device according to the present invention, Fig. A is a front view, Fig. B is a plan view, and Fig. C is an illustration of Fig. B. - Enlarged view of the part along line A,
Similarly, Figure D is an enlarged view of a portion along the Ro-Ro line in Figure B. 2, 2'... lower belt roller, 3, 3'... upper belt roller, 4, 5... a pair of endless belts,
6... Ceramic sheet, 6a... Horizontal dividing groove, 6b... Vertical dividing groove, 7... Curved roller, 8... Three rollers.

Claims (1)

[Scope of Claim for Utility Model Registration] A device for dividing a ceramic sheet into a large number of small pieces, each of which has dividing grooves in the form of a parallel grid extending in the horizontal and vertical directions cut into a large number of small pieces. 1. From the supply side of one end with the ceramic sheet sandwiched between the opposing surfaces of the feeding side sliding band of the endless belt and the feeding side sliding band of the second endless belt wound between the upper belt rollers. A conveying element for transporting to the discharge side at the other end, and one end and the other end of the upper and lower rollers are arranged in a vertically opposing relationship so as to be in contact with the outer surfaces of the feed side sliding bands of the first and second endless belts. Between the arranged curved roller and one end and the other end of the upper and lower rollers, the first,
It consists of a combination of three rollers disposed vertically opposite each other so as to be in contact with the outer surface of the feed side sliding band of the second endless belt, and the curved roller is composed of a convex roller and a concave roller, and a roller is connected between the rollers. When the ceramic sheet passes, it is divided along the horizontal dividing groove, and the three rollers are composed of two pressing rollers and one receiving roller, and when the ceramic sheet passes between the rollers, A ceramic sheet dividing device characterized in that it is configured to divide the ceramic sheet along the longitudinal dividing groove and discharge a large number of divided ceramic pieces from the other end of the conveying element.