NL1040638C2 - Device for cutting a stone strip from a stone, method for cutting a stone strip from a stone. - Google Patents

Device for cutting a stone strip from a stone, method for cutting a stone strip from a stone. Download PDF

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Publication number
NL1040638C2
NL1040638C2 NL1040638A NL1040638A NL1040638C2 NL 1040638 C2 NL1040638 C2 NL 1040638C2 NL 1040638 A NL1040638 A NL 1040638A NL 1040638 A NL1040638 A NL 1040638A NL 1040638 C2 NL1040638 C2 NL 1040638C2
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NL
Netherlands
Prior art keywords
transport
brick
strip
cutting
stone
Prior art date
Application number
NL1040638A
Other languages
Dutch (nl)
Inventor
Miklos Bela Husek
Original Assignee
Gmv Gyártó-Szolgáltató És Forgalmazó Kft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gmv Gyártó-Szolgáltató És Forgalmazó Kft filed Critical Gmv Gyártó-Szolgáltató És Forgalmazó Kft
Priority to NL1040638 priority Critical
Priority to NL1040638A priority patent/NL1040638C2/en
Application granted granted Critical
Publication of NL1040638C2 publication Critical patent/NL1040638C2/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28DWORKING STONE OR STONE-LIKE MATERIALS
    • B28D7/00Accessories specially adapted for use with machines or devices of the preceding groups
    • B28D7/04Accessories specially adapted for use with machines or devices of the preceding groups for supporting or holding work or conveying or discharging work
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23DPLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D47/00Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
    • B23D47/04Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of devices for feeding, positioning, clamping, or rotating work
    • B23D47/045Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of devices for feeding, positioning, clamping, or rotating work feeding work into engagement with the saw blade

Description

Device for cutting a stone strip from a stone, method for cutting a stone strip from a stone.
The invention relates to a device for cutting a stone strip from a stone, the device comprising a conveying means and a cutting device for cutting along a cutting surface, wherein in use bricks lie on the conveying means and are moved along and under the cutting device for sawing from a brick strip from a brick.
In the context of the invention, "cutting" is understood to mean cutting into or from a part of the material. Sawing is a form of cutting.
The traditional way of building houses and other buildings is still done with stony materials. For several decades it has been in vogue to give both internal and external walls and facades made of other materials, such as concrete or steel, the appearance of stony products. The walls are provided with brick slips for this purpose. For making brick slips, a stone-like product, such as a brick, is cut into a narrow section, usually 10-30 mm thick.
In known devices, the device comprises a conveyor in the form of a conveyor belt. Bricks are placed on the means of transport. The stones are placed in a holder, which prevents the stone from moving too much. The conveying means is moved under a saw blade with the saw blade rotating and aligned in a direction along the running direction of the conveying means. The saw blade cuts a strip off the stone.
When using the known device for cutting a brick strip from a brick, a number of problems arise.
When sawing the stone strip, it regularly occurs that the stone strip is not flat at one end, but has a small protrusion, also known as the "nose". Such brick slips are difficult or unworkable.
Breaking the stone strip is also a common problem.
It is an object of the invention to provide an apparatus and method for cutting a brick strip from a brick that alleviate one or more of the above problems.
To this end, the device according to the method is characterized in that the device comprises flexible pressing means on both sides of the cutting surface, for pressing stones onto the conveying means, and the device comprises means for causing the pressing means to move at a speed approximately equal to that of the means of transport.
The pressing means press the stones against the transport means. The inventor has realized that the nose on stone strips is created because, just before a stone strip is completely sawn loose, the stone strip regularly breaks loose along a fault line. The result is that a small part of the rest of the stone remains unsawed at the end of the brick strip. This forms a nose on one side of the brick slip. This process cannot or hardly be avoided in existing establishments. If large lateral forces were to be exerted on the brick plus strip, this would cause breakage. The pressing means, preferably in the form of pressure belts, of the device according to the invention hold the brick strip and the rest of the brick at the location just before, during and immediately after sawing, without too many forces being exerted on the brick strip exerted. The cutting device continues to be sawed even if the brick strip breaks loose at the end of the saw cut and, because the brick strip and the rest are held in place by the pressing means, the brick strip is cut straight.
The transport means preferably comprises a conveyor belt, preferably made of flexible material. As a result, the forces exerted by the pressing means are distributed over the brick and the brick strip.
The cutting device preferably comprises a rotating saw blade. Within the scope of the invention, the cutting device can also be a water or laser cutting device, but a cutting device with a rotating saw blade is preferred.
The transport means preferably comprises a notch in which the saw blade can rotate without sawing into the transport means and the transport means is provided with a reinforcement piece under the notch, a flexible material being located underneath the reinforcement piece. This prevents or reduces the chance that the stone or parts of the stone run away during sawing.
In embodiments, the transport means comprises a conveyor belt, or a number of conveyor belts placed one behind the other, possibly with intermediate gaps through which waste can fall. In further embodiments, the transport means can also be a system of rotating cylinders, which can be regarded as a large number of small conveyor belts lying one behind the other.
The device preferably comprises after the cutting device a first and a second further transporting means arranged next to each other for the further transport of brick strip and the rest of the brick, wherein the transport means comprise transport surfaces and wherein the transport surfaces of the first and second transport means have a mutual angle of at least 15 degrees, wherein the second transport surface is directed downwards with respect to the first transport surface, and the device is provided with a means for causing a brick strip to fall over on the first transport means.
The mutual angle of the transport surfaces ensures that the rest of the brick is discharged downwards. This makes it possible for an upright brick strip to fall over so that it can be transported further in a flat position. The stone strip preferably falls such that the cutting surface faces upwards.
The transport speed of the first further transport means is preferably greater than that of the transport means, preferably at least 40% higher. This simplifies further treatment of the brick slips such as selection and packaging.
The device preferably further comprises a third further transport means for taking over brick slips from the first further transport means, wherein a gap is adjustable between the first and third transport means.
Providing an adjustable gap between the first and third transport means makes it possible to remove fracture. By adjusting the gap to slightly less than half the length of a sawn brick strip, in use, brick strips fall into the gap and can be disposed of as waste.
The transport speed of the third further transport means is preferably higher, preferably at least 40% higher, than that of the first further transport means.
The device preferably comprises a check device for checking brick slips on the first further transport means, the check device being adapted to give a check signal and the device is provided with a control for adjusting the gap between the first and the third further transport means, wherein the control has an input for the control signal and the size of the gap is dynamically controlled by the control signal.
The slit ensures that broken brick slips fall away as waste and are removed. However, if a small piece of a brick slip has broken off, the length of the brick slip has not changed. By using a control device which emits a control signal and thereby dynamically control the gap size, such defective products can be identified and disposed of as waste.
In embodiments, the checking device comprises a camera system for checking the shape of the stone.
These and further aspects of the invention are described below and illustrated with reference to the drawing:
The drawing shows:
Figure 1 shows a problem with known devices for cutting a brick strip from a brick,
Figures 2 to 14 show different views of parts of a device according to the invention in different embodiments.
The figures are exemplary figures, the same parts are generally designated by the same reference numerals.
Known devices include a saw blade and a transport means for transporting stones. Stones are placed on the means of transport, the stones are placed in a holder that prevents the stone from moving too much. The conveying means is moved under the saw blade with the saw blade rotating and aligned in a direction along the running direction of the conveying means. The saw blade cuts a strip off the stone.
Figure 1 illustrates a problem with the known devices. The saw blade cuts a brick strip 3B from a brick 3, so that a remainder 3A remains. Just before the end of the stone, relatively large forces are exerted by the saw blade on a small piece of stone. As a result, a break in the stone may occur more or less in the direction of the saw cut, but only more or less. Figure 1 shows a fracture that penetrates into the remainder. The result is that the brick strip comes loose from the remainder while taking part of the remainder of the brick. This phenomenon is also called breaking out of the brick slip.
That part, indicated with N for nose in Figure 1, is not sawn off. The stone is not clamped sideways, because that gives the risk of the saw blade getting stuck and / or considerably increasing the risk of total breakage. The result is that just before the end of the sawing, the brick strip recedes to the side and the nose N remains attached to the brick strip. Such brick slips are not or hardly usable. Although it is often only a slight deviation in size of a few millimeters and, moreover, is located on the invisible side of a brick slip, the nose is clearly visible if one is going to glue such a brick slip. The brick strip in question starts to protrude outside the surface formed by brick strips without a nose and this is a very striking deviation for the human eye.
Figure 2 illustrates a device according to the invention. The device according to the invention comprises on either side of the cutting device 1 a pressing means, in this example containing pressing belts 4A and 4B. The pressure belts press a brick 3 against a conveyor 2. In this example, the conveyor comprises a flexible conveyor 2. The belts 4A and 4B move at substantially the same speed as the conveyor 2. Because the belts move in this way there is virtually no friction between the blocks. and conveyor belt 2 and belts 4A and 4B. The circular saw cuts a brick strip off the brick. The end product, the brick strip, and the residual product, the other part of the brick, are clamped vertically between the pressure belts 4A, 4B and the conveyor belt 2 on both sides of the circular saw blade during the sawing action. The pressure belts also function as a transport system.
As explained above, there is a chance that the stone, and especially when it reaches the end of the cutting path, will break out, resulting in a nose or the cutting surface. The higher the temperatures during cutting, the greater the chance of this in general. Higher temperatures occur with the harder and generally more expensive stone types, which exacerbates the problem. The pressure belts 4A, 4B prevent the brick strip or the rest of the brick from breaking out because both parts are clamped vertically by pressing means moving along with the transport means. Even if the brick slip breaks out, the brick slip will still be held in place so that the saw blade still removes the nose from the brick slip. This results in a higher quality.
The device according to the invention makes no demands on the length or width dimensions of the stone and therefore offers great flexibility. The device preferably comprises an adjusting means for adjusting the distance between the pressing means and the transporting means, so that it can easily be made suitable for all dimensions from Belgian small format to Russian large format. The distance between the stones is freely selectable. Especially for harder stones it can be an advantage because the harder the stone is, the saw blade must extend after a sawing action.
In embodiments, a brick strip can be sawn off both on the right and on the left of a brick.
Figure 2 shows a part of a device according to the invention in perspective view, in figure 3 in top view, in figure 4 in side view, and in figure 5 in rear view.
Figure 6 shows a detail of a conveyor belt 2. The conveyor belt 2 contains a slot or notch 5 for the saw blade. On the opposite side, the conveyor belt is provided with a reinforcement piece 6, with a flexible material 7 underneath the reinforcement piece.
In the notch 5 in which the saw blade can rotate without sawing in the transport means and the transport means is provided with a reinforcement piece under the notch. The reinforcement piece 6 and the flexible material 7 ensure sturdiness and ensure that the stone cannot walk on the conveyor belt.
The invention also offers the following advantage:
Statistically speaking, between 5 and 30% of stones or strips break during cutting. Although the invention reduces the percentage, breakage will still occur. Breakage that occurs during sawing is held down by the co-rotating pressure means, in examples that are V-belts, and stays away from the cutting elements of the saw blade. Breakage can no longer be trapped between the flange of the saw blade and walls of a holder for a stone because there is no holder for the stone because the stone is clamped vertically.
Clamping is preferably effected by: a. Choosing a V-belt material that is not too hard for the pressure belts, which can be pressed in somewhat (e.g. Shore 65) b. choose a rubber type for the conveyor belt that is also slightly compressible; c. provide a spring element on the actuator of the upper pressure belt turner, as a result of which the pressure belt can deviate (upwards) in the event of an unforeseen clamping.
Figure 7 illustrates an aspect of preferred embodiments of the invention. After the conveying means, the brick strip and the rest of the brick are further discharged by a first and a second further conveying means 10 and 11. These conveying means are preferably in the form of a conveyor belt which has a nose shape on one side. Such a band is hereinafter also referred to as nose band.
The noseband 11 for the remainder 3A is inclined downwards, the mutual angle of the conveying surfaces of the first and second further conveying means 10, 11, respectively, preferably being at least 15 degrees, and for example lying between 17 and 23 degrees. As a result, the remaining piece 3 A disappears quite quickly below the level of the brick strip 3B. The sawn-off brick strip 3B will be able to stand or fall over, but then always on the non-remainder side due to the lack of support. If the strip is still standing, the strip is preferably blown to the side with an air blast or knocked over with a rotating rubber flap. This is preferably done in the top center of the brick strip to prevent rotation. The horizontal end product can then be inspected with the cutting surface at the top.
The transport speed of the first further transport means is preferably higher than, most preferably more than 40% higher than, the transport speed of the transport means. This creates space between the brick slips, which simplifies further processing. In figure 9 the length of the brick slips is also indicated by the double arrow L. Preferably the drive of the first and second further transport means 10, 11 is combined. In that case both said transport means move at the same speed.
In embodiments, the device comprises a third further transport means 12 for taking over brick slips from the first further transport means. After the noseband 10, the strip is fed on in this example to a driven roller conveyor 12 (hereinafter referred to as "harmonica belt"). This has a dynamically adjustable distance G to the deflection roller of the noseband 10. The presetting is determined by the length L of the strip and is always half the length minus a small distance, for example 5 or 10% of the length L. Broken brick slips will fall through the hole G. The distance is preferably dynamically adjustable.
The device according to a preferred embodiment comprises a camera CAM.
The CAM camera can - a. Detect many broken parts, these must be eliminated; - b. determine a break in the strip without being in several parts, the strip must be excreted; - c. determine a strip with a broken corner, this must be excreted; - d. determine a complete strip, which can be transferred to the packaging.
If the camera detects mode 25a, the broken parts will fall away to a discharge belt positioned below.
In the case of mode b. and c. before the brick slip reaches the slit G, the front roll of the harmonica belt enlarges the hole G, for example 1 to 2 cm more than the length L, to make the hole sufficiently large for a natural fall to the conveyor belt. The presetting is then brought back into position.
If mode d. is found, the presetting of the harmonica band is maintained: the strip continues its way on the harmonica band 12 because the gap is not large enough to make it fall. The adjustable portion of the belt 12 is indicated by 13. With 14 controlling this. As an example, Figure 7 shows a situation in which camera CAM sends a video signal V to a central processing unit CPU. Here the image is analyzed and the mode is determined. The control unit 14 is controlled depending on the mode. Figure 7 shows a perspective view, Figure 8 a top view, Figure 9 a side view and Figure 10 a rear view.
It will be clear that many variations are possible within the scope of the invention. In the example, the brick strip is sawn off on one side, it is possible to feed the remainder directly to a second installation, which cuts off a further brick strip on the other side. This can be useful in particular if the camera is also used to check the condition of the remainder. The camera is able to see if this residual part is broken or not. With this information, a second dynamic harmonica roller belt can be placed horizontally after the noseband 11 in front of the remainder to allow broken parts to fall through to the same conveyor belt. The uncracked residual pieces can simply be arranged in a row via a conveyor belt and supplied to a second device according to the invention, which then cuts off a brick strip on the opposite side.
Instead of a camera, it is also possible to use photocells or even an X-ray device to assess the condition of a brick strip or remainder.
Figures 11 to 14 illustrate a preferred embodiment of the invention, already briefly mentioned above. In embodiments, the device comprises a means for causing the brick strip 3B to fall over on the first further transport means 10. Because the transport surfaces of the first 10 and second 11 further transport means, in this example formed by conveyor belts, make an angle of preferably more than 15 degrees, residual brick 3 A sinks under brick strip 3B. In the embodiment shown, a rotating cylinder 15 with rubber protrusions is used to touch the brick strip in the center of the brick strip. This causes the brick slip to fall on conveyor belt 10 with the cut side up. Figures 11 to 14 show this from different views. Figure 14 further shows, in the insert, that belt 10 is provided with a small diameter return roller 16, which gives this belt the shape of a nose at the transition between belt 2 and belt 10.

Claims (14)

  1. A device for cutting a stone strip (3B) from a stone (3), the device comprising a transport means (2) and a cutting device (1) for cutting along a cutting surface, wherein in use stones (3) on the transport means (2) and are moved along and under the cutting device (1) for sawing a brick strip from a brick, characterized in that the device comprises flexible pressing means (4A, 4B) on both sides of the cutting surface pressing stones on the conveying means, and the device comprises means for moving the pressing means at a speed approximately equal to that of the conveying means.
  2. Device as claimed in claim 1, characterized in that the transport means comprises a conveyor belt.
  3. Device as claimed in claim 2, characterized in that the conveyor belt is made of flexible material.
  4. Device as claimed in any of the foregoing claims, characterized in that the cutting device comprises a saw blade rotating in operation.
  5. Device as claimed in any of the foregoing claims, characterized in that after the cutting device the device comprises a first (10) and a second (11) further transporting means arranged next to each other for further transporting respectively brick strip (3B) and rest (3A) ) of the stone, wherein the first and second further conveying means (10, 11) comprise conveying surfaces and wherein the conveying surfaces of the first and second further conveying means have an angle of at least 15 degrees relative to each other with the second conveying surface downwards relative to the first conveying surface and the device is provided with a means (15) for causing a brick strip (3B) to topple over the first further transport means (10).
  6. Device as claimed in any of the foregoing claims, characterized in that after the cutting device the device comprises a first and a second further transport means arranged next to each other for the further transport of respectively brick strip and rest of the brick, wherein the transport speed of the first further transport means (10) larger than that of the transport means (2).
  7. Device according to claim 6, characterized in that the transport speed of the first further transport means is at least 40% greater than that of the transport means (2).
  8. Device as claimed in claim 5, characterized in that the device comprises a joint drive for the first and second further transport means.
  9. Device as claimed in any of the foregoing claims, characterized in that the device further comprises a third further conveying means (12) for taking over brick slips (3B) of the first further conveying means (10) with a gap between the first and third conveying means (G) which is adjustable.
  10. Device according to claim 9, characterized in that the transport speed of the third further transport means (12) is higher than the transport speed of the first further transport means (10).
  11. Device as claimed in claim 9 or 10, characterized in that the device is a checking device (CAM) for checking brick slips (3B) on the first further transport means (10), the checking device being arranged for dispensing with a control signal (V, S) and the device is provided with a control for adjusting the gap (G) between the first (10) and the third (12) further transport means, the control having an input for the control signal and the size of the gap is dynamically controlled by the control signal.
  12. 12. Method for manufacturing a brick strip from a brick, wherein the brick strip wherein bricks (3) are placed on a transport means (2) and moved along and under the cutting insert (1) for sawing a brick strip (3B) from a brick stone (3), characterized in that the stone is clamped on both sides of the cutting surface by flexible pressing means (4A, 4B), for pressing stones onto the conveying means, and the pressing means at a speed approximately equal to that of the means of transport are moved.
  13. A method according to claim 12, characterized in that after cutting, the residual brick is lowered relative to the brick strip and the brick strip is tapped on a conveyor belt with the cut side up.
  14. Method according to claim 13, characterized in that a camera is used for inspecting the brick slip.
NL1040638A 2014-01-29 2014-01-29 Device for cutting a stone strip from a stone, method for cutting a stone strip from a stone. NL1040638C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL1040638 2014-01-29
NL1040638A NL1040638C2 (en) 2014-01-29 2014-01-29 Device for cutting a stone strip from a stone, method for cutting a stone strip from a stone.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL1040638A NL1040638C2 (en) 2014-01-29 2014-01-29 Device for cutting a stone strip from a stone, method for cutting a stone strip from a stone.

Publications (1)

Publication Number Publication Date
NL1040638C2 true NL1040638C2 (en) 2015-08-06

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NL1040638A NL1040638C2 (en) 2014-01-29 2014-01-29 Device for cutting a stone strip from a stone, method for cutting a stone strip from a stone.

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3724439A (en) * 1967-12-15 1973-04-03 Arvonia Buckingham Slate Co In Apparatus for trimming slate
US3918210A (en) * 1972-09-05 1975-11-11 Christensen Diamond Prod Co Apparatus for milling faces of masonry blocks
DE4436152C1 (en) * 1994-10-11 1996-04-04 Keller Gmbh Machine for treating, especially planing sides of green or fired bricks
EP1050388A2 (en) * 1999-05-07 2000-11-08 IMA Maschinenfabriken Klessmann GmbH Machine for machining edges with a workpiece conveyor chain
US20030235478A1 (en) * 2002-06-20 2003-12-25 Stoscher Dennis C. Apparatus and method for shaping an edge of a tile
US7056188B1 (en) * 2002-07-29 2006-06-06 Robinson Brick Company Rock saw
US7628677B1 (en) * 2007-05-15 2009-12-08 Branton H T Automated insulation milling machine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3724439A (en) * 1967-12-15 1973-04-03 Arvonia Buckingham Slate Co In Apparatus for trimming slate
US3918210A (en) * 1972-09-05 1975-11-11 Christensen Diamond Prod Co Apparatus for milling faces of masonry blocks
DE4436152C1 (en) * 1994-10-11 1996-04-04 Keller Gmbh Machine for treating, especially planing sides of green or fired bricks
EP1050388A2 (en) * 1999-05-07 2000-11-08 IMA Maschinenfabriken Klessmann GmbH Machine for machining edges with a workpiece conveyor chain
US20030235478A1 (en) * 2002-06-20 2003-12-25 Stoscher Dennis C. Apparatus and method for shaping an edge of a tile
US7056188B1 (en) * 2002-07-29 2006-06-06 Robinson Brick Company Rock saw
US7628677B1 (en) * 2007-05-15 2009-12-08 Branton H T Automated insulation milling machine

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Effective date: 20190201