JPH0448082B2 - - Google Patents

Description

[Detailed Description of the Invention] "Objective of the Invention" (Industrial Application Field) The present invention is for use in ceramics, for example, in a two-piece tile raw material, whose soles are integrally joined on the surface to be divided. The present invention relates to a method and apparatus for cutting green substrate.

(Background of the Prior Art) FIG. 4 shows a conventional situation in which a ceramic blank 3 extruded from an extrusion molding machine A is cut. In addition, in the ceramic raw material 3, the symbols 3b, 3b
are the parts that become the front surface after the part 31 forming the sole is divided into upper and lower halves. As shown in the figure, the ceramic blank 3 is cut by rotating the cutting tool B, which has a piano wire _B1 suspended like a string in a bow, toward the ceramic blank 3. I was trying to do that. Therefore, in the green ceramic material 3 cut in this way, burrs are generated on the surface 3b side closer to the mounting surface during cutting. Such burrs are caused by the drying of the ceramic raw material 3,
This causes scratches such as moge and chips to occur during firing, etc., and it was necessary to scrape off each time to prevent scratches from occurring. Further, in the cutting method as described above, there were cases in which the cross-sectional shape of the green ceramic blank 3 was distorted.

Conventionally, a cutting device as shown in FIG. 5 has been developed in order to prevent the occurrence of burrs. This figure shows the principle of a conventional cutting device, and the structure of the cutting device is such that cutting blades D and D are slid toward each other and separated by a crank mechanism C or the like. And an extrusion molding machine (not shown)
The green ceramic blank (not shown) transported from the factory is passed through the midpoint between the two cutting blades D, D, as shown by the white arrow, so that the planned dividing plane and the sliding surface of the two cutting blades D, The direction of motion is set perpendicular to the direction of motion. That is, by making the opposing meshing of both cutting blades D and D occur on the planned dividing surface of the ceramic raw material, burrs gather on the planned dividing surface and cancel each other out. . However, such a cutting device has the drawbacks shown in FIG. In other words, if the cutting posture of the ceramic blank 3 carried between the two cutting blades D is tilted even slightly, the biting direction of the cutting blade D will also be tilted accordingly, and this will cause the cutting blades to D and D expanded cooperatively and could not be cut.
Moreover, since the cutting blade D has almost no elasticity, it crushes the ceramic blank, especially when it cuts into the inclined bit as described above. In such a case,
Discarding a large amount of ceramic green material near the cutting area,
This resulted in breakage of the cutting blade and a decrease in production efficiency.

The present invention has been developed in view of the above circumstances, and it is possible to cut ceramic blanks regardless of the cutting position, and the cut surface is finished neatly, and there is no occurrence of burrs. It is of course an object of the present invention to provide a novel method for cutting green ceramic blanks (hereinafter referred to as the cutting method of the present invention) and a cutting device for green ceramic blanks (hereinafter referred to as the cutting apparatus of the present invention).

"Structure of the Invention" (Means for Solving the Problems) The gist of the cutting method of the present invention is to cut ceramic materials such as two-piece tile blanks whose soles are integrally joined on the planned dividing surface. A method of cutting a raw material for use, which comprises at least two pieces of material, each of which is made of a piano wire, etc.
By moving one end of each of the book racks, the cutting lines of the books are bitten in opposite directions from both surfaces of the ceramic blank toward the planned dividing plane in the center, and the book is eventually formed on the dividing plane. The point is to continue moving one end of the tensioning frame of each cutting line until the diagonal contact point between the cutting lines reaches the outside of the ceramic blank along the planned dividing plane.

In addition, the gist of the cutting device of the present invention is as follows:
At least two cutting lines made of piano wire or the like are strung diagonally across each other so as to touch each other at the midpoint, and the tensioned ends of each cutting line are moved in opposite directions or opposite directions to separate the two cutting lines. It consists of a slider that relatively moves the contact point.

(Example) The present invention will be described below based on drawings showing examples thereof.

FIG. 1 is a schematic front view showing the principle of the most important part of the cutting device of the present invention. As shown in the figure, the main parts of the cutting device of the present invention are a cutting line 1 and a slider 2.

The cutting line 1 is made of piano wire or the like,
At least two of them are pulleys 4a, 4b, 4c
Each section is strung up in an inverted triangular shape.
Further, springs 5, 5 for tensioning and biasing the cutting line 1 are interposed between the pulleys 4b, 4c.

The slider 2 is configured such that the lower pulleys 4c, 4c, which stretch the cutting lines 1, 1, move oppositely to each other, and as a result of this opposing movement, the cutting lines 1, 1 intersect diagonally, and both The two contact each other at an intermediate point, and the contact point P moves upward while being rubbed.

The green ceramic blank 3 is placed at the midpoint between the cutting lines 1, 1, and its dividing plane 3a is set along the upward direction of the contact point P on the cutting lines 1, 1.

The cutting situation and operation of the cutting device of the present invention will be explained based on the figure. The opposing movement of both lower pulleys 4c, 4c by the slider 2 is performed synchronously, and both cutting lines 1, 1 are made from each surface 3b, 3b of the ceramic blank 3, with both surfaces 3b, 3b placed in a vertical state. They begin to feed on each other. And both cutting lines 1,1
While cutting the ceramic raw material 3, the two cross each other beyond the parallel state, and eventually come to intersect obliquely. At the time of oblique crossing, both cutting lines 1, 1 come into cross-contact with each other on the planned dividing surface 3a of the ceramic raw material 3, as described above, and a contact point P is formed. The contact point P rises along the dividing surface 3a as the slider 2 moves the lower pulleys 4c, 4c toward each other. When the section 3d is reached, the cutting of the ceramic raw material 3 is completed. In short, in the cutting method of the present invention, the cutting line 1 waiting on the right side of the ceramic blank 3 cuts the right half of the ceramic blank 3 with the planned dividing plane 3a as the base line, and the cutting line 1 waiting on the left side The left half part is cut, and the cutting is gradually completed from the point at which the contact point P of these two cutting lines 1, 1 moves along the planned dividing surface 3a of the ceramic blank 3. be. Moreover, by contacting the two cutting lines 1, 1, they are biased for correcting so that they do not separate from each other, and the cutting progress plane at the contact point P is always made on a single plane. Therefore, the cut surface of the ceramic green material 3 cut by the cutting method and the cutting device of the present invention is as follows:
Even if the green ceramic blank 3 is introduced into the cutting position in an oblique state, it can be finished neatly. In addition, in the same figure, cutting lines 1, indicated by two-dot chain lines,
The stopped state 1 is for ensuring reliability in cutting by causing the slider 2 to overrun. The ceramic blank 3 cut by the cutting device of the present invention has both surfaces 3b, 3
Since cutting is performed simultaneously from side b, the cutting stresses cooperate with each other, and burrs caused by the cutting line gather on the planned dividing surface 3a and cancel each other out, so that both surfaces 3b ,3b
It does not occur at all on the side and side 3c side. Furthermore, even if a slight burr occurs on the surface 3a to be divided, it will never have any adverse effect on the subsequent manufacturing process or construction of the ceramic green material. The spring 5 for tensioning and biasing the cutting line 1, which is interposed between the pulleys 4b and 4b, is necessary because the slider 2 is configured to move linearly oppositely. This is not necessary if the sliders 2, 2 are configured to move oppositely along arcuate trajectories with radii centered around the respective pulleys 4b, 4b.

FIGS. 2 and 3 show an embodiment of the cutting device according to the present invention. FIG. 2 is a partially omitted perspective view, and FIG. 3 is a side sectional view seen from the direction of arrow X in FIG. The apparatus of this embodiment has two cutting apparatuses of the present invention installed facing each other, and is designed to finish both end surfaces of a long, rough-cut ceramic blank. The apparatus of this embodiment includes a transport mechanism 6 (see FIG. 2), a thinning mechanism 7
and a self-cleaning mechanism 8 (see FIG. 3) along the cutting line 1. As shown in the figure, the slider 2 of the cutting device of the present invention in the device of this embodiment is as follows:
Both lower pulleys 4c and 4c are configured to slide along two upper and lower guide bars 2a and 2b, and a lower pulley 4c that penetrates the upper guide bar 2a and a lower pulley that penetrates the lower guide bar 2b. 4c are attached so as to maintain an appropriate distance between them in the sliding direction. As shown in FIG. 3, two date bars 2c, 2c are installed on the base frame 70 of the cutting device of the present invention, and the two date bars 2c, 2c are placed close to each other with both cutting lines 1, 1 in between, and both lower pulleys as described above are installed. 4c, 4c in the sliding direction is accommodated by the inclined tension of both cutting lines 1, 1. Therefore, the two cutting lines 1, 1 cross and come into contact when the two lower pulleys 4c, 4c (see FIG. 2) slide against each other in the vertical positional relationship.

As shown in FIG. 2, the transport mechanism 6 includes two carry mechanisms 61 arranged orthogonally intersecting each other in a T-shape.
It consists of 62. One kill mechanism 62 is the loading plate 6
2b and a discharge plate 62c, and the loading plate 6
2b pushes the uncut green material (not shown) between the cutting devices of the present invention, and the discharge plate 62c operates to scrape out the cut green material (not shown) from between the cutting devices of the present invention. Further, the carry mechanism 62 is connected to the loading plate 62b and the fixed pressing plates 62a, 62 when uncut green material is loaded between the cutting devices of the present invention.
The uncut green material is held and held by the parts a and a. The other carry mechanism 61 is a supply plate 61
a and a delivery plate 61b, and the supply plate 61
a supplies the uncut green material to the carry mechanism 62, and the delivery plate 61b operates to send out the cut green material in the carry mechanism 62 to the next process.
The fixed pressing plate 62a, loading plate 62b, ejection plate 62c and carry mechanism 61 of these carry mechanisms 62
The supply plate 61a and the delivery plate 61b were manufactured using brass plates in consideration of ease of separation from the ceramic raw material. Further, the T-shaped substrate 60 in the two carry mechanisms 61 and 62 was also manufactured using a brass plate in consideration of the slidability of the ceramic raw material.
Although not shown in the drawings, the movement of the carry mechanisms 61 and 62 is performed by appropriate means such as various cylinders, chains, ball screws, and self-propelled loading mechanisms. Also, reference numeral 9 in the same figure
is a tension adjustment bolt for the cutting line 1, and the tension can be adjusted by changing the degree of screwing of the wing nut 10.

As shown in FIG. 3, the thinning mechanism 7 includes base frames 70, 7 of both the cutting devices of the present invention on the lower surface side of the substrate 60 in the carry mechanism 62 (see FIG. 2).
0 are configured to move oppositely to each other.
Moreover, thinning chute 71, 71 which can be continuous with the base plate 60 of the carry mechanism 62 is attached to the center height of the base frames 70, 70, respectively. Reference numeral 72 in the figure is a guide bar that slides and guides the base frames 70, 70, and is installed perpendicular to the direction in which the cutting line 1 is stretched in the cutting device of the present invention. Therefore, when the cutting lines 1, 1 of the cutting devices of the present invention come into diagonal contact with each other when cutting the ceramic green material, the thinning mechanism 7 moves the cutting devices of the present invention reciprocally and holds them. The cutting residue of the raw material is removed through cutting lines 1, 1, . . .
It's starting to come out. The thinning mechanism 7 also functions as a standby mechanism in the cutting device of the present invention, and the carry mechanism 61
Both cutting devices of the present invention are kept on standby outside the cutting area until the uncut green material is carried in by means 62 and 62.

The self-cleaning mechanism 8 is provided on the base frame 70 of the cutting device of the present invention, and is composed of a brush tool 82 that contacts both cutting lines 1, 1, and an air cylinder 81 that raises and lowers the brush tool 82. Accordingly, the self-sweeping mechanism 8 is designed to remove the green fabric pieces adhering to both cutting lines 1, 1 of the cutting device of the present invention by the lifting and lowering movement of the brush tool 82.

The operation status of the apparatus of this embodiment thus constructed will be briefly explained.

First, an uncut green base material is placed in the area indicated by the arrow Y shown in FIG. The uncut green material is pushed out by the supply plate 61a of the carry mechanism 61 and loaded between the loading plate 62b and the discharge plate 62c of the carry mechanism 62, and is also pushed out by the loading plate 62b of the carry mechanism 62. It is pushed into the cutting device of the present invention and held between the loading plate 62b and the fixed pressing plate 62a.
Also, at this time, the carry mechanism 61 performs a return operation and returns to the predetermined position. And the thinning mechanism 7 (third
(see figure), both the devices of the present invention are brought close to a predetermined cutting position (the side of the substrate 60 in the carry mechanism 62), and the rough cut portions at both ends of the uncut green material are cut by the cutting devices of the present invention. . The cutting residue of the cut green substrate is ejected to the thinning chute 71 by the reciprocal movement of both cutting devices of the present invention by the thinning mechanism 7, and the cut green substrate is ejected by the discharge plate 62c of the carry mechanism 62. It is scraped out from between the two cutting devices of the present invention. Furthermore, the green fabric pieces adhering to each cutting line 1, 1, . . . of both cutting devices of the present invention are removed by a self-cleaning mechanism 8. Also, place the next uncut green base material at the arrow Y in Fig. 2,
When loading the uncut green material between the cutting devices of the present invention, the carry mechanism 62 is used as described above.
The cut green material existing within the carry mechanism 61
They are simultaneously discharged by a delivery plate 61b. By the way, the cutting device of the present invention may be installed directly on the downstream side of the extrusion molding machine, but in this case, the extrusion molding machine must be stopped each time the cutting line is replaced or adjusted. It is preferable to provide it separately as in the example device. Further, by increasing the diameter of the cutting line, an appropriate radius can be formed at the edge of the cut surface of the ceramic green material.

"Effects of the Invention" As is clear from the above explanation, according to the ceramic blank cutting method and cutting device according to the present invention, the ceramic blank is introduced obliquely into the cutting position. Even if there is a problem, it can be cut without any support, and the cut surface can be finished neatly. Of course, no burrs will be generated on the surface or side surfaces of the ceramic raw material. In addition, compared to conventional cutting devices that use cutting blades, the cutting device of the present invention has a simple structure in which piano wire, etc. is stretched, reducing running costs and reducing work such as replacing cutting wires. It has many excellent advantages, including ease of handling.

[Brief explanation of drawings]

FIG. 1 is a schematic front view showing the principle of the main parts of the cutting device of the present invention, FIG. 2 is a perspective view partially omitting an embodiment of the cutting device of the present invention, and FIG. A side sectional view seen from the arrow X direction in the figure,
Fig. 4 is a schematic perspective view showing a conventional method for cutting green ceramic blanks, Fig. 5 is a partially cutaway perspective view showing the principle of another conventional cutting device, and Fig. 6 is a defect in Fig. 5. FIG. 3 is a schematic plan view showing the phenomenon. 1... Cutting line, 2... Slider, 3... Ceramic blank, 3a... Planned dividing surface.

Claims (1)

[Scope of Claims] 1. A method for cutting ceramic raw material such as two-part tile raw material whose soles are integrally joined together on the planned dividing surface, and in which a piano wire or the like is stretched. At least two cutting lines are cut in opposite directions from both surfaces of the ceramic green material toward the planned dividing plane in the center by moving one end of each of the tension frames, and on the dividing planned plane. A ceramic material for ceramics, characterized in that one end of the tensioning frame of each cutting line is continued to be moved until the diagonal contact point between the cutting lines, which is formed in due course, reaches the outside of the ceramic material along the planned dividing plane. How to cut the substrate. 2. At least two cutting lines made of piano wire, etc. strung diagonally across each other so as to touch at the midpoint;
A cutting device for ceramic green material, comprising a slider that moves the stretched end portions of each of the cutting lines in opposite directions or opposite directions to relatively move the contact points of the two cutting lines.