JPS6228209A - Manufacture of fine stone plate - 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 (Field of Industrial Application) The present invention relates to a method for manufacturing fine stone plates used as architectural stones etc. by cutting natural stone or artificial stone into many pieces at once. Fine Stone Plate's 'J1?' manufactures ultra-thin stone plates with excellent surface smoothness and durability for use in architectural stones, etc. by quickly and multi-cutting stone or artificial stone into smooth cross sections. x
Regarding the law.

(Prior art) Conventionally, it has been widely practiced to cut upgrown natural stone or artificial stone with a Guiamondo canter to produce architectural stones, but in this way, 5! The thickness of architectural stones left behind is usually about 17 to 25 mm, and even the thin ones used for decoration are 5 mm or more thick. Therefore, such stones not only have a large weight, but also reduce the number of product stone slabs that can be obtained from a certain amount of raw stone materials, making the unit price of each stone slab extremely expensive.

(Problem to be Solved by the Invention) Therefore, in order to increase the number of products obtained from raw stone, attempts have been made to perform cutting by narrowing the spacing between the spacers of the blade, but the curvature of the blade during cutting The thickness of the stone plate should be carefully adjusted to avoid problems such as mechanical instability, reducing cutting ability, cracks in the stone plate, or even cracking the stone plate, resulting in a defective product. Cutting to 5 mm or less was impossible.

Furthermore, if the cutting speed is increased, cracks are likely to occur in the stone being cut, so it is not possible to cut quickly.

(Means for solving the problems and their effects) The present invention has been made in view of the above 1g. As a result of intensive research, the inventors have found that [cracks occur in natural stones or artificial stones]. This is due to differences in the coefficient of thermal expansion of the various mineral grains that make up the stone (for example, granite is composed of mineral grains of feldspar, mica, and quartz), stone grains, etc., and the friction that occurs during cutting. Because heat is unevenly distributed in the stone (for example, the center is hot and the outside is cold),
This is largely due to local expansion differences that occur in the stone during cutting. Based on this recognition, by performing the cutting operation while immersed in a mixed liquid containing abrasive grains, the cutting friction heat generated by cutting is always sufficiently removed, and the application of abnormal impact force is avoided. This was done while preventing the occurrence and growth of cracks.

That is, the present invention provides a method for producing a fine stone play F in which natural stones or artificial stones are multi-cutted by contact movement of a large number of blades arranged in parallel. This is a method for manufacturing fine stone plates that uses continuous contact movement of blades.

The natural stones or artificial stones to be cut in the present invention include stones such as granite, marble, and terrazzo tiles, but are especially composed of a plurality of different mineral grains or stone grains. The effect of the present invention can be manifested in -NWAH when the difference in the coefficient of thermal expansion of grains is large and when cutting thin plates in particular.

The abrasive-containing liquid used in the present invention includes water, CMC
These include aqueous solutions, polyvinyl alcohol aqueous solutions, gum arabic aqueous solutions, sodium alginate aqueous solutions, petroleum, mineral and vegetable oils, alcohols, and mixtures thereof. A mixed solution with added is preferable.

The abrasive grains contained in the solution include materials such as silicon carbide and alumina, and these abrasive grains generally have a particle size of 10
These abrasive grains have a diameter of about 100 μm, and are usually contained in the solution in an amount of 5 to 30% by weight. Further, in addition to the abrasive particles, other compounds such as an abrasive dispersant, a dispersion aid, and a cutting stone may be mixed in the abrasive-containing liquid in an amount of about 5 to 6% by weight.

The most important point in the present invention is that the stone is immersed in the abrasive-containing liquid for cutting, and therefore a cutting tank containing the abrasive-containing liquid is required to be large enough to immerse the stone. It is.

The cutting tank is generally made of stainless steel, enameled iron plate, plastic, or iron with an inner rust-proof lining.

Further, the endless blade that cuts the stone by contacting it in a certain direction may be arranged in any shape as long as it is rotatable in a certain direction or sometimes by reversing the blade, but in particular, the blade may be arranged in any shape with a flat bottom. The blade is stretched over pulleys arranged so that it can be arranged in a polygonal shape such as a triangular or quadrangular shape, and the flat bottom of the endless belt-like blade is brought into contact with natural stone or artificial stone, and the pulley on which the blade is stretched is stretched. It is desirable to cut by rotating it with a motor or the like and making contact with the stone in a certain direction.

The endless belt-shaped blade may have any shape as long as it is rotatable, but a belt-shaped base blade is used to prevent the blade from vibrating during cutting, and because of the need for high tension as described below. It is preferable that the blade be provided in the center and the cutting edge blades be arranged in series to sandwich it.

The band-shaped base blade must rotate along the outer periphery of a pulley arranged in a polygonal shape, and for this purpose, either the ends of a single block divided into small pieces like a chain are connected with a bottle or the like, or It is made of soft rubber or the like, like a letter-shaped belt, and then shaped into a circular endless belt.

Further, the cutting edge blade is fixed to the lower end of the base blade by spot welding or the like, and rotates together with the rotation of the base blade. As for the material forming the endless belt-like blade, it is desirable to use thin plate-like hard steel, stainless steel, etc. for the cutting edge blade, and
Mild steel is used for the base blade.

The material used to form such an endless belt-like blade generally has a thickness of 0.1 to 1.0 m+o and a length of 60 m.
They are about 0-1800uua and 10-30+nm wide, and the base blade of the single block that makes up these has a thickness of 0.1-1. O1ω, length 15-30a
+m, width 10-301. The thickness of the cutting edge blade is 0.1 to 1. O+o+a, length is 15-30++
+a+, width 10-30mm, these cutting edge blades 2
Use by fixing the sheet to the base blade.

A large number of these endless belt-shaped blades are arranged in parallel to the seven blade support frames, and since the blades are endless circular blades, the pulleys arranged in the polygonal shape with these circular blades By passing the frame between the two, one of the pulleys is pulled outward, and the frame is usually tensioned with a tension of 60 to 300 Kg/co2 and is in contact with natural stone or artificial stone.

In order to increase the number of products that can be obtained simultaneously from raw stone, the endless belt-like blades are arranged so that the spacer spacing of the blade is 41 or less, and particularly preferably 200 to 600 pieces are arranged parallel to each other at a distance of 0.5 to 3 a+m. It is desirable to be in contact with

At the contact portion between the endless belt-shaped blade and the raw stone material,
It is desirable that the spout of the nozzle be installed in the same direction as the direction of rotation of the blade so that the abrasive-containing liquid can be jetted to remove the powder to be cut that may accumulate and impede cutting. The abrasive-containing liquid sprayed from the nozzle is usually 0.
．． It is injected at a speed of about 1 to 2+o/sec. Furthermore, depending on the situation, the direction in which the abrasive-containing liquid is ejected may be opposite to the direction in which the blade rotates.

Furthermore, if the amount of powder to be cut that remains in the tank increases, cutting will be inhibited, so a portion of the muddy water drained by cutting is continuously taken out and transferred to a separator to separate and remove the powder to be cut.

Then, the separated abrasive grain-containing liquid is used again by being circulated directly to the cutting layer or to the cutting tank via the nozzle. The circulation speed of the abrasive-containing liquid varies depending on the size of the cutting tank and the size of the stone to be cut, but in general, the entire circulating liquid in the cutting tank is theoretically exchanged about 2 to 10 times per hour. It circulates as much as possible.

An appropriate stirring device 30 is provided at the bottom of the cutting tank to prevent the abrasive grains and powder to be cut from settling.

The separation device for removing the powder to be cut includes a separation device;
Various separation devices such as centrifugal separation and filter separation can be used.

Next, in order to explain the present invention more specifically, the present invention will be explained below based on the drawings.

FIG. 1 is a vertical cross-sectional view of a cutting device for manufacturing a fine plate in an embodiment of the present invention, and FIG. 2 is an enlarged partial cross-section of the endless belt-like plate of the device shown in FIG. Fig. fIS3 is a plan view of its top or C), and Fig. 4 is its A-A'! A cross-sectional view, FIG. 5 is a perspective view of a single blade constituting the blade, and FIG. 6 is an explanatory diagram of a state in which the rotating device and the endless belt-like blade are engaged.

In FIG. 1, 1 is a natural or artificial stone installed on a pedestal 4 at the bottom of a cutting tank 3 filled with an abrasive-containing liquid 2, and the stone 1 is immersed in the abrasive-containing liquid 2 and cut. The upper side portion 1a of the stone is also submerged in the abrasive grain-containing liquid 2. Note that a stirring device 30 is provided at the bottom of the cutting tank 3 to make the distribution of abrasive grains uniform in the cutting tank.

On the upper side 1a of the stone 1, there are two pulleys 6a and 6b rotatably pivoted to the image end portions 5a and 5b of a C-shaped blade support frame 5, and a C-shaped blade support frame 5. A pulley 6c is attached to an output shaft 8a of a motor 8, which is horizontally suspended by a bolt 7 from the center of the pulley 6c.
The hook is passed between three pulleys, and a large number of endless belt-like blades 9 are arranged in parallel in an equilateral triangular shape.

The blade support 7 frame 5 has its upper part connected to a horizontal rod 10.
At both ends of the horizontal rod 10, there are a plurality of guides n1la, llb vertically and parallel to the left and right side walls 3b, 3c of the cutting tank 3.
Guides g12a and 12b are installed therethrough, and are configured to be able to vertically slide down by their own weight.

As shown in FIGS. 2 to 5, the triangularly arranged blade 9 has a base blade 16 sandwiched between the upper portions of two cutting edge blades 15a and 15b, and a single blade fixed by spot welding. Both ends of the block 9a are connected by a pin 17 or the like to form an endless belt, and the blade 9 is made into a strong tension by tightening the wing nut 7a screwed onto the bolt 7 passing through the center of the C-shaped blade support frame 5. It is strung up. In addition, by providing the bolt 7 with an elastic body such as a spring interposed in its center,
It is also possible to allow free vertical vibration of the motor 8, pulley 6C, etc.

To rotate the endless belt-shaped blade 9, as shown in FIG. The blade 9 transmits the signal to the three pulleys 6a and 6b, and the blade 9 transfers the signal to the three pulleys 6a and 6b.

It rotates between 6b and 6C while maintaining an equilateral triangular shape.

Since the space between each pulley is stretched with strong tension, the blade 9 has a straight shape, and in particular, the C-shaped blade support frame 5
A pulley 6a is pivotally attached to the tip of the pulley 6a.

It is horizontal between 6b, and the stone 1 to be cut is brought into contact with the stone 1 between them and the stone 1 is cut. In addition,
A guide rod 11 is provided to prevent horizontal vibration of the blade support frame 5.
It is preferable to provide a blade support frame lateral vibration prevention frame 13 with both ends fixed below the blades a and llb. The blade support frame lateral vibration prevention frame 13 is provided with a long groove 13a to prevent the blade support frame 5 from lateral vibration.

Abrasive grains that separate and remove the powder to be cut from the stone 1 discharged during cutting to quickly remove it so that it does not exist in the gap between the stone 1 and the blade 7 and impede cutting. The liquid 2 is ejected from the glue 14 onto the contact area between the stone 1 and the blade 7 in the same direction as the movement of the blade or in the opposite direction. Since the powder to be cut removed from the contact area floats in the abrasive grain-containing liquid 2 and obstructs cutting, it is discharged from the discharge port 18 and temporarily stored in the liquid reservoir 19, and then transferred to the funnel-shaped rotary separator 20. The upper layer liquid 21 and the lower layer liquid 22 are separated by
O, 21 is further replaced with a three-layer ceramic filter 23a-cf
! :Transferred to the cylindrical separator 24 equipped with 4 stages 25a-
Separate into d. The liquid 25d that has passed through the filter 23c, which is the finest among the filters 23a-c, is the liquid that contains the most powder to be cut, and is therefore disposed of as waste. , are mixed in an adjustment tank 26, and the mixing ratio is adjusted according to the size and distribution state of the abrasive grains. The mixed liquid is pumped to the pump 27.
or cutting W to the jet nozzle 17 by
Supplied directly to I3 and circulated. Note that when the stirring device 30 is not provided in the cutting tank, the outlet 18 may be installed near the center or at the bottom of the tank.

(Example) A cutting tank with a length of 20 cm, into which an abrasive-containing liquid of 50 cm, width 40 cm, and fi 50 cm was injected.
It! The entire marble measuring 13c+n and 20c+n in thickness is immersed and placed on a pedestal. And the top surface has a thickness of 0.2
1fi[6, width 15m+n, quality 30IoIQ two cutting edge blades thickness 0.2mm, width 2011 length 301
Thirty single block blades were fixed to the base blade of No. 11111 by spot welding and connected with a bottle to form a chain. Then, these endless belt-shaped blades were arranged in an equilateral triangle shape with one side of 30 cm, and the tension was 150K with the blade spacing of 10 blades being 2.4 cm.
g and hang each blade on the marble surface. Then, each blade 9 rotated by a motor was lowered into contact with the marble to perform multi-canting.

Since powder to be cut is generated by this cutting, in order to remove this powder, the abrasive grain size of 2 to 75μω is used to remove the powder.
A water mixture of carborundum abrasive grains that accounts for 0% is supplied by being injected from the nozzle 14 from the front to the rear in the same direction as the movement of the blade in the cutting surface. As a result, the powder to be cut is washed away from the stone cutting groove and removed from the cutting surface.

The muddy water (abrasive grain mixture containing powder to be cut) in the cutting tank is pumped from the upper part of the cutting tank into the n reservoir at a rate of 250 liters per hour, and then transferred to the first rotary funnel-shaped separator where it is centrifuged. be done. The total number of abrasive grain valves that are separated by this centrifugal separator and flow out from below is 60 to 7.
0% is recovered here. In addition, muddy water containing a large amount of powder to be cut flowing out from above is removed by a second filter equipped with a ceramic filter having continuous pores of 70 μm, 25 μm, and 10 μm.
Separation is performed in a separator. The separation ratio of each filter in this second separator is 35% of the 70 μm abrasive grains.
, 25 to 10 μl of abrasive grains accounted for 15%, and the abrasive grain valve divided here was 10 to 20% of the total. The abrasive grain valve recovered here is mixed with the abrasive grain valve flowing out from below the Pt51 separator, and is again circulated to the cutting tank for use.

Further, the liquid that has passed through all the filters of the second separator contains a large amount of powder to be cut, and is therefore disposed of as waste liquid.

Marble was cut to a thickness of 2 mm in this way, but no cracks occurred, and the cutting speed was 1
The average cutting time was around 0.4 minutes per 0 cL02, which was 1/2 the cutting time compared to the method of multi-cutting using horizontal simple harmonic motion of the blade.

The ultra-thin piece of marble produced in this way had a surface smoothness of 10μLO''ll', and its dimensional accuracy was within 1%.Next, in order to smooth the surface, vinylidene fluoride was applied as a fluorine thread resin to the surface. The surface smoothness was improved to 3μIfl by coating it thinly and heating it in an electric furnace to a temperature of 270'C to form a coating layer.Furthermore, a large number of these ultrathin pieces were coated with a mesh spacing of about 1 am2. Sheets having various shapes and widths were manufactured by pasting T&Usuda polymer mats.

(Effect of the invention) The fine stone plate of the present invention as described above
It has been said that during the cutting of cow meat and calves at Kori Tei, cracks and cracks occur in the stone due to the vibration of the blade, which cracks and results in defective products. In addition, the blade spacer interval can be narrowed to 4 mm or less for cutting, increasing the number of product stone plates (stone plates) that can be obtained from a certain amount of expensive raw stone with wonderful patterns and colors. I can do it.

Therefore, the present invention, which allows many beautiful ultra-thin stone plates to be produced from rare rocks without failure, is an extremely useful method from the point of view of resource conservation.

In addition, since stone and other materials can be kept at a constant temperature because they are cut in a liquid bath, cracks will not occur due to changes in thermal expansion even if the cutting speed is increased. The growth of can be stopped by submerged canting.

Moreover, the cutting time is 1/2 compared to the method of multi-canting by horizontal simple vibration of the blade, and multi-cutting can be performed with high efficiency.

Furthermore, during cutting, a portion of the abrasive-containing liquid is continuously extracted, the powder to be cut is separated and removed by a separator, and only the abrasive particles are recycled, which increases cutting efficiency and speeds up the cutting speed. .

Moreover, the cut stone is thin and lightweight, and the cut surface has a smoothness of about ±10 μm, and the dimensional accuracy is extremely high because it is cut at a constant temperature in a liquid bath. be. therefore,
Furthermore, there is no need to perform surface finishing such as polishing, and the plate can be used as a decorative board for concrete walls, wooden walls, ceilings, etc.

As described above, the present invention has novel and excellent effects, is unprecedented in the past, and makes a very large contribution to this field.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view of a cutting device for producing fine stone plates according to the present invention, Fig. 2 is an enlarged partial side view of a belt-shaped blade within the device itself, and Fig. 3 is an enlarged partial side view of the belt-shaped blade within the device itself. 4 is a sectional view taken along the line AA' in FIG. 2, FIG. 5 is a perspective view of a single blade constituting the blade, and FIG. 6 is a diagram showing the relationship between the rotating device and the endless belt-like blade. FIG. 1: Stone 2: Abrasive grain-containing liquid 3: Cutting tank 5 Niblade support frame 6a =
6b*6e Near"-leaf: Porto 8; Motor 9: Endless belt-like blade 9a: Pre-, -de single block 10: Horizontal rod 11: Continuous rod 11a, llb: Guide rod 12a, 12b: Guide tube 14: Nozzle 18: Outlet
1: Liquid reservoir 20: Funnel-shaped rotary separator

Claims (4)

[Claims] (1) In a method for manufacturing a fine stone plate in which multi-cutting is performed by contact movement of a large number of blades arranged in parallel with natural stones or artificial stones, the endless belt-shaped blade is A method for manufacturing a fine stone plate, which is characterized by carrying out continuous contact movement. (2) A part of the muddy water discharged by multi-cutting is continuously extracted, powder to be cut is removed by a separator, and then the collected abrasive grain-containing liquid is recycled and used. Manufacturing method for fine stone plates. (3) A method for manufacturing a fine stone plate according to claim 1 or 2, in which the abrasive-containing liquid is injected into the contact area between the stone and the blade in the same direction or in the opposite direction to the movement of the blade. (4) The method for manufacturing a fine stone plate according to any one of claims 1 to 3, in which multi-cutting is performed with the spacing between blades arranged in parallel being 4 mm or less.