JPS621509A - Method and device for cutting ceramic green foundation - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] "Objective of the Invention" (Industrial Field of Application) 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, the symbols 3b and 3b in the ceramic raw material 3 are portions that become the front surface after being divided into upper and lower halves at the portion 31 forming the sole. As shown in the figure, the ceramic blank 3 is cut by rotating a cutting tool B, which is made up of a piano wire Bs stretched like a string in a bow, toward the ceramic blank 3. was. Therefore, in the green ceramic blank 3 cut in this manner, burrs occur on the surface 3b side closer to the mounting surface during cutting. The particles like q cause scratches such as moges and chips to occur during drying and firing of the ceramic raw material 3, and had to be scraped off one by one to prevent the occurrence of scratches. . In addition, the above-described cutting method sometimes distorts the cross-sectional shape of the green ceramic material 3.

Therefore, in the past, in order to prevent the occurrence of paris, the fifth
A cutting device as shown in the figure has been developed.

This figure shows the principle of a conventional cutting device, and the structure of the cutting device is such that the cutting blade is
D are separated by sliding in opposite directions. The ceramic blank (not shown) is transported from the extrusion molding machine (not shown)
(not shown) is made to pass through the midpoint of both cutting blades and D, as shown by the white arrows, and the dividing plane and said both cutting blades.

It is set so that the sliding direction of D is orthogonal to each other. That is, by making the opposing meshing of both cutting blades D occur on the planned dividing surface of the ceramic raw material, the edges 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 cutting blades D is even slightly tilted,
Along with this, the biting direction of the cutting blade is also tilted,
This was cooperatively expanded between both cutting edges, D, and could not be cut. Moreover, since the cutting blade has almost no elasticity, it crushes the ceramic blank, especially when it cuts in at an angle as described above. In such cases, large amounts of ceramic blanks near the cutting area should be discarded,
This resulted in breakage of the cutting blade and a decrease in production efficiency.

The present invention has been made in view of the above circumstances, and it is possible to cut the ceramic blank regardless of the cutting position, and the cut surface is finished neatly, and there is no occurrence of paris. 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 ceramic blank, wherein at least two cutting lines, such as piano wire, are strung diagonally across each other and brought into contact at a midpoint between the two, and the contact point is located at the planned dividing surface of the ceramic blank. The ceramic blank is cut by moving the stretched end portions of both cutting lines so as to rub along the cutting lines.

In addition, the gist of the cutting device of the present invention is that 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 strung end portions of each cutting line are set opposite to each other. and a slider that is moved in one direction or in the opposite direction to relatively rub and move the contact points of both the cutting lines.

(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, and at least two of them are stretched in an inverted triangular shape by Boo'J 4a, 4b, and 4c. Also, pulley 4
A spring 5.5 for tensioning and biasing the cutting line 1 is interposed between each of the lines b and 4c.

The slider 2 is a lower boob that tensions the cutting line 1.1. J-4c, 4c are configured to move oppositely to each other, and by this opposing movement, both the cutting lines 1, 1
The contact points cross obliquely and contact each other at a midpoint between the two, and the contact point moves upward while being rubbed.

The green ceramic blank 3 is placed at the midpoint between the two cutting lines 1.1, and is set so that its dividing plane 3a is along the upward direction of the contact point at the two cutting lines 1.1.

The cutting situation and operation of the cutting device of the present invention will be explained based on the figure. Both lower pulleys 4c, 4 by slider 2
The opposing movement of c is carried out synchronously, and both cutting lines 1.1 are on both surfaces 3b, and each surface 3b of the ceramic blank 3 is placed in a vertical state. From 3b onwards, they begin to bite into each other. The two cutting lines 1.1 go beyond parallel to each other while cutting the ceramic green material 3, and eventually come to intersect obliquely. At the time of oblique crossing, as mentioned above, the dividing plane 3 of the ceramic green material 3
The two cutting lines 1.1 intersect on a and a contact point is formed.

The contact point is between both lower pulleys 4 by the slider 2.
c, As the opposing movement of 4c progresses, the dividing plane 3
a, and when the contact point reaches the top 3d of the planned dividing surface 3a of the ceramic green material 3, the cutting of the ceramic green 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 contact point of both cutting lines 1.1 is the ceramic blank 3.
Cutting is gradually completed from the point when the cutter moves along the planned dividing plane 3a. Moreover, both cutting lines 1
. Therefore, the cut surface of the green ceramic blank 3 cut by the cutting method and the cutting device of the present invention is clean even if the green ceramic blank 3 is introduced into the cutting position in an oblique state. Finished in. In addition, in the same figure, the cutting line 1°1 indicated by the chain double-dashed line
The stopped state is to ensure cutting by overrunning the slider 2. As described above, the green ceramic material 3 cut by the cutting device of the present invention is simultaneously cut from both surfaces 3b and 3b, so that the cutting stresses cooperate with each other, and Paris according to the cutting line is the planned dividing plane 3
a and cancel each other out, and both surfaces 3b, 3
Even if a slight crack occurs on the b side and the side 3C side, and even if a slight crack occurs on the sheet metal dividing surface 3a, it will never have an adverse effect on the subsequent manufacturing process or construction of the ceramic blank. The spring 5 for tensioning and biasing the cutting line 1, which is interposed between the pulleys 4b and 4c, 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 coughing device of this embodiment includes a transport mechanism 6 (see FIG. 2), a meat removal mechanism 7
and a self-cleaning mechanism 8 (see FIG. 3) along the cutting line I. As shown in the figure, the slider 2 of the cutting device of the present invention in this embodiment is constructed such that both lower pulleys 4c, 4c slide along two upper and lower guide bars 2a, 2b. Upper guide bar 2
Lower pulley 40 penetrating through 8 and lower guide bar 2b
A lower pulley 40 passing through the lower pulley 40 is attached so as to maintain an appropriate distance between the two in the sliding direction. As shown in FIG. 3, the base frame 70 of the cutting device of the present invention has two date pars 2c placed close to each other with both cutting lines 1, 1 in between.
2c has been constructed, and both lower boo 'J' as mentioned above are installed.
4c, 4c in the sliding direction is accommodated by the inclined tension frame at both cutting lines 1.1. Therefore, both cutting lines 1°1 are connected to the lower pulleys 4c, 4c (second
(see figure) slides against each other in the vertical position relationship,
They are designed to cross and touch each other.

As shown in FIG. 2, the transport mechanism 6 consists of two carry mechanisms 61 and 62 arranged orthogonally intersecting in a T-shape.

One carry mechanism 62 includes a loading plate 62b and a discharge plate 62.
c, the loading plate 62b pushes the uncut green material (not shown) between the two cutting devices of the present invention, and the discharge plate 62
c operates to scrape out the cut green material (not shown) from between the cutting devices of the present invention. Further, the carrying mechanism 62 is designed to hold and hold the uncut green material between the loading plate 62b and the fixed pressing plates 62a and 62a when the uncut green material is loaded between the cutting devices of the present invention. The other carry mechanism 61 has a supply plate 61a and a delivery plate 61b, the supply plate 61a supplies the uncut green material to the carry mechanism 62, and the delivery plate 61b supplies the cut green material in the carry mechanism 62. It operates as if sending the base material to the next process. The fixed press plate 62a, loading plate 62b, and ejection plate 62c of the carry mechanism 62, and the supply plate 61a and delivery plate 61b of the carry ta structure 61 are made of brass plates in consideration of ease of separation from the ceramic raw material. did. Furthermore, the T-shaped substrates 60 in the two carry mechanisms 61 and 62 were also manufactured using brass plates in consideration of the sliding properties of ceramic raw materials. Although not shown, the carry mechanism 61
The movement drive in and 62 is performed by appropriate means such as various cylinders, chains, ball screws, and self-propelled loading mechanisms. Further, reference numeral 9 in the 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 the carry mechanism 6
2 (see FIG. 2), the base frames 70, 70 of the cutting device of the present invention are moved relative to each other on the lower surface side of the substrate 60 in FIG. Further, at the center of the height of each of the base frames 70 and 70, the base plate 6 of the carry mechanism 62,
A thinning chute 71° 71 that can be continuous with zero is attached. Reference numeral 72 in the figure is a guide bar that slides and guides the base frame 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 line 1.1 of the cutting device of the present invention comes into diagonal contact with the ceramic blank, the thinning mechanism 7 moves the cutting device of the present invention reciprocally with respect to each other, thereby cutting the green material. Lines 1, 2, . . . are used to eject green material cutting residue to the thinning chute 71°71. Incidentally, the thinning mechanism 7 also functions as a standby mechanism in the cutting device of the present invention, and the carrying mechanism 61 and 6
The cutting device of the present invention is kept on standby outside the cutting area until the uncut green material is carried in by step 2.

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 adapted to remove the pieces of green material adhering to both cutting lines 1.1 of the cutting device of the present invention by the raising 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 substrate is placed at a position indicated by the arrow 7 in FIG.
c, and is pushed into the cutting device of the present invention by the loading plate 62b of the carry mechanism 62, and is 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 a predetermined position.

Then, the thinning mechanism 7 (see FIG. 3) brings the device of the present invention close to a predetermined cutting position (near the substrate 60 in the carrying mechanism 62), and the rough cut portions at both ends of the uncut green material are cut by the cutting device of the present invention. disconnected.

The cutting residue of the cut green substrate is ejected to the thinning chute 71 by the reciprocal movement of the cutting device of the present invention by the thinning mechanism 7, and the cut green substrate is discharged by the discharge plate 62c of the carry mechanism 62. It is scraped out from between the cutting devices. In addition, each cutting line 1 of the cutting device of the present invention
,1. The green fabric pieces adhering to... are removed by the self-cleaning mechanism 8. In addition, when placing the next uncut green fabric at the position indicated by the arrow 7 in FIG. The cut green material existing in the carry mechanism 6
They are simultaneously discharged by one 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. Example device (
It is better to set it up separately. 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, the cutting device of the present invention does not cause any cracks to occur on the surface or side surfaces of the ceramic blank, and compared to the conventional cutting device that uses a cutting blade, the cutting device of the present invention has a simple structure in which piano wire or the like is stretched. It has many excellent advantages, such as lower running costs and easier handling in terms of replacement of cutting lines.

[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. 4 is a schematic perspective view showing a conventional method of cutting green ceramic blanks; FIG. 5 is a partial diagram showing the principle of another conventional cutting device. cutaway perspective view,
FIG. 6 is a schematic plan view showing the defect phenomenon in FIG. 5. 1... Cutting line 2... Slider 3...
Green blank for ceramic industry 3a... Planned dividing plane Figure 1

Claims (1)

[Scope of Claims] 1. A method for cutting a ceramic raw material such as a two-piece tile raw material whose soles are integrally joined together on the planned dividing surface, the method comprising at least two pieces of piano wire, etc. Stretch the cut lines diagonally across each other so that they contact each other at their midpoints, and move the stretched ends of both cut lines so that the contact point rubs and moves along the planned dividing surface of the ceramic green material. 1. A method for cutting a green ceramic material, the method comprising cutting the ceramic material using a hand. 2. Cutting at least two cutting lines made of piano wire or the like strung diagonally across each other so as to touch each other at the midpoint, and moving the strung ends of each cutting line in opposite directions or opposite directions to cut both of the lines. A cutting device for ceramic green material, characterized by comprising a slider that relatively moves the contact points of the lines.