JP7570973B2 - Filter paper belt processing device - Google Patents

Description

This relates to a filter paper belt treatment device that separates the processing fluid contained in a filter paper belt used to purify the processing fluid of a grinding machine or cutting machine, and the sludge that has adhered to the filter paper belt, from the filter paper belt.

In order to reuse machining fluid, a device has been proposed that uses a belt-shaped filter paper to remove sludge contained in used machining fluid. For example, the liquid filtration and regeneration device described in Patent Document 1 is one such device.

The filter paper belt is a long, strip-shaped filter wound in a roll. In the filtration regeneration device described in Patent Document 1, the band-shaped filter paper belt unwound from the roll is sent in a state in which both sides of the concavely curved portion are sandwiched between a pair of disks and a meshed endless belt, and the used processing fluid is passed through the sandwiched filter paper belt, so that the sludge contained in the processing fluid is captured by the filter paper belt. The used filter paper belt is then sent from its tip into a collection box, where it is collected.

JP 2001-314703 A

However, with the filtration regeneration device described in Patent Document 1, a large amount of processing fluid is carried out of the machine by the used filter paper belt, resulting in a low regeneration rate of the processing fluid. In addition, the filter paper belt is discharged together with sludge and cannot be treated as recyclable waste as is, so there are problems with this, as it requires the work of scraping off the sludge containing metal powder such as cutting chips before disposal. In addition, if the strength of the filter paper belt is reduced due to its thickness or material, the filter paper belt may tear, in which case the work of scraping off the sludge becomes even more difficult.

The present invention was made against the background of the above circumstances, and its purpose is to provide a filter paper belt treatment device that can recover the processing fluid contained in the filter paper belt and sludge from a filter paper belt to which sludge has adhered, and separate the sludge without damaging the filter paper belt.

The gist of the first invention is that (a) a filter paper belt processing device that recovers a processing liquid contained in a filter paper belt and sludge adhering thereto, and separates the sludge without damaging the filter paper belt, includes (b) a rotating drum that is driven to rotate in one direction about a predetermined rotation center line, (c) a squeezing roller that is rotatably provided at a position upstream of the uppermost position of the rotating drum in the rotation direction of the rotating drum while pressing the filter paper belt with the filter paper belt wrapped around it, and (d) a separation roller that is provided downstream of the uppermost position of the rotating drum in the rotation direction of the rotating drum and has a smaller diameter than the rotating drum, and separates the filter paper belt that has moved with the rotating drum from the squeezing roller from the outer circumferential surface of the rotating drum.

The gist of the second invention is that in the first invention, a magnet is provided at a fixed position inside the rotating drum, and generates a magnetic force that attracts the magnetic metal powder to the outer circumferential surface of the rotating drum at the area pressed by the squeezing roller and the area separated by the separating roller.

The gist of the third invention is that in the first or second invention, it includes a machining fluid chute plate that slides on the outer circumferential surface of the rotating drum at a position upstream of the portion pressed by the squeeze roller in the direction of rotation of the rotating drum and guides the machining fluid that flows down along the outer circumferential surface of the rotating drum from the portion pressed by the squeeze roller away from the outer circumferential surface of the rotating drum, and a machining fluid recovery box that receives the machining fluid that falls from the machining fluid chute plate.

The gist of the fourth invention is that, in any one of the first to third inventions, it includes a take-up roller that winds up the filter paper belt and applies tension to the filter paper belt, and a guide roller that guides the filter paper belt, which has been detached from the outer circumferential surface of the rotating drum by the detachment roller, to the take-up roller.

The gist of the fifth invention is that, in any one of the first to fourth inventions, it includes a sludge chute plate that slides on the outer circumferential surface of the rotating drum at a position downstream in the rotation direction of the rotating drum from the portion of the rotating drum that is separated by the separating roller, and guides the sludge carried along with the outer circumferential surface of the rotating drum away from the outer circumferential surface of the rotating drum, and a sludge collection box that receives the sludge that falls from the sludge chute plate.

According to the filter paper belt processing device of the first invention, after the filter paper belt is pressed between the squeeze roller and the rotating drum, it moves together with the outer peripheral surface of the rotating drum, passes through the top position of the rotating drum, and is separated from the outer peripheral surface of the rotating drum by a peeling roller located downstream in the rotation direction of the rotating drum. When the filter paper belt is pressed between the squeeze roller and the rotating drum, the processing liquid contained in the filter paper belt and the sludge on it is squeezed out. After being pressed, the filter paper belt moves together with the outer peripheral surface of the rotating drum, and in the process of being separated from the outer peripheral surface of the rotating drum by the peeling roller, the filter paper belt is separated from the sludge on the outer peripheral surface by a peeling roller with a smaller diameter than the rotating drum, and the sludge on the outer peripheral surface falls according to gravity. This allows the processing liquid contained in the filter paper belt to be efficiently collected, and the sludge to be separated without damaging the filter paper belt.

According to the filter paper belt processing device of the second invention, a magnet is provided at a fixed position inside the rotating drum, and generates a magnetic force that attracts the magnetic metal powder to the outer circumferential surface of the rotating drum at the area pressed by the squeezing roller and the area separated by the separating roller. As a result, the magnetic force of the magnet prevents the sludge from flowing off at the area pressed by the squeezing roller, and the magnetic force of the magnet pulls the sludge away from the filter paper belt to the outer circumferential surface of the rotating drum at the area separated by the separating roller, and holds it there. This allows the processing liquid contained in the filter paper belt to be efficiently recovered, and allows the sludge to be suitably separated without damaging the filter paper belt.

The filter paper belt processing device of the third invention includes a machining fluid chute plate that slides on the outer circumferential surface of the rotating drum at a position upstream of the pressing portion of the squeezing roller in the direction of rotation of the rotating drum and guides the machining fluid that flows down from the pressing portion of the squeezing roller along the outer circumferential surface of the rotating drum away from the outer circumferential surface of the rotating drum, and a machining fluid recovery box that receives the machining fluid that falls from the machining fluid chute plate. This allows the machining fluid that is about to flow down along the outer circumferential surface of the rotating drum to be efficiently recovered in the machining fluid recovery box.

The filter paper belt processing device of the fourth invention includes a winding roller that winds up the filter paper belt and applies tension to the filter paper belt, and a guide roller that guides the filter paper belt, which has been detached from the outer circumferential surface of the rotating drum by the separating roller, to the winding roller. This allows the filter paper belt from which sludge has been efficiently separated to be wound up on the winding roller and collected.

The filter paper belt processing device of the fifth invention includes a sludge chute plate that slides on the outer circumferential surface of the rotating drum at a position downstream in the rotation direction of the rotating drum from the portion of the rotating drum that is separated by the separating roller, and guides the sludge carried along with the outer circumferential surface of the rotating drum away from the outer circumferential surface of the rotating drum, and a sludge collection box that receives the sludge that falls from the sludge chute plate. This prevents the sludge from adhering to the outer circumferential surface of the rotating drum and being carried in the rotation direction of the rotating drum and falling into the processing fluid collection box, and the sludge carried along with the outer circumferential surface of the rotating drum is efficiently collected in the sludge collection box.

1 is a schematic diagram illustrating the configuration of a filter paper belt processing device according to an embodiment of the present invention. FIG. 2 is a schematic diagram illustrating the configuration of a filter paper belt processing device according to another embodiment of the present invention, and corresponds to FIG. 1 . FIG. 2 is a schematic diagram illustrating the configuration of a filter paper belt processing device according to still another embodiment of the present invention, and corresponds to FIG. 1.

Below, an embodiment of the present invention will be described in detail with reference to the drawings. Note that in the following embodiment, the drawings have been appropriately simplified or modified, and the dimensional ratios and shapes of each part are not necessarily drawn accurately.

Figure 1 is a schematic diagram illustrating the configuration of a filter paper belt processing device 10, omitting the machine frame, drive device, etc. In Figure 1, a rotating drum 12 is rotatably supported by a machine frame (not shown) around a horizontal rotation center line C1, and is driven to rotate in one rotation direction A1 by a drive device (not shown). The part of the rotating drum 12 shown in Figure 1 shows a cross section of a part formed from a cylinder made of a non-magnetic metal, such as a stainless steel plate or a copper alloy plate.

The filter paper belt processing device 10 is equipped with a squeeze roller 14, a pull-off roller 16, a guide roller 18, and a take-up roller 20, which are supported by a machine frame (not shown) so as to be rotatable around a rotation center line parallel to the rotation center line C1 of the rotating drum 12. The pull-off roller 16 is set to a diameter sufficiently smaller than the diameter of the rotating drum 12 so that the sludge Sg can be suitably separated from the filter paper belt 22, which is wound around the pull-off roller 16 and has a small diameter.

When the filter paper belt 22 is wrapped around the squeeze roller 14, the squeeze roller 14 is pressed against the outer circumferential surface 12a of the rotating drum 12 at a position upstream of the uppermost position P1 of the outer circumferential surface 12a of the rotating drum 12 in the rotation direction A1 of the rotating drum 12. A pair of bearings (not shown) that rotatably support the squeeze roller 14 are biased toward the rotating drum 12 by, for example, a spring or a pneumatic cylinder so that the squeeze roller 14 is pressed against the outer circumferential surface 12a of the rotating drum 12 at a position upstream of the uppermost position P1 of the outer circumferential surface 12a of the rotating drum 12. The angle θa between the vertical line L1 passing through the rotation center line C1 of the rotating drum 12 and the line L2 passing through the rotation center line C1 of the rotating drum 12 and the rotation center of the squeeze roller 14 is smaller than 45 degrees and larger than 15 degrees. The pressing portion by the squeeze roller 14 is located at the intersection of the line L2 and the outer circumferential surface 12a of the rotating drum 12.

The separating roller 16 is provided downstream of the uppermost position of the outer peripheral surface 12a of the rotating drum 12 in the rotation direction A1 of the rotating drum 12, and guides the filter paper belt 22 that has moved from the squeezing roller 14 together with the outer peripheral surface 12a of the rotating drum 12 so as to change direction in a direction away from the outer peripheral surface 12a of the rotating drum 12, in this embodiment, diagonally upward. The angle θb between the vertical line L1 passing through the rotation center line C1 of the rotating drum 12 and the line L3 passing through the rotation center line C1 of the rotating drum 12 and the rotation center of the separating roller 16 is greater than 45 degrees and less than 90 degrees. The separating portion by the separating roller 16 is located at the intersection of the line L3 and the outer peripheral surface 12a of the rotating drum 12.

The guide roller 18 guides the filter paper belt 22, whose direction has been changed by the separating roller 16, to the winding roller 20, which is positioned lower than the rotation center line C1 of the rotating drum 12 and the separating roller 16. The winding roller 20 is rotated by a drive device (not shown) and winds up the filter paper belt 22 after the sludge Sg has been removed.

A number of magnets 24, consisting of permanent magnets or electromagnets, are fixedly arranged on a machine frame (not shown) inside the rotating drum 12. The magnets 24 generate a magnetic force that attracts the sludge Sg to the outer circumferential surface 12a of the rotating drum 12 at least in the area pressed by the squeezing roller 14 and in the area where the filter paper belt 22 is separated by the separating roller 16.

The filter paper belt 22 is a nonwoven fabric made from natural or synthetic fibers, such as rayon or polyester fibers, and is a long filter material formed into a belt shape with a specified thickness. The sludge Sg is, for example, accumulated on the filter paper belt 22 by filtering dirty grinding fluid (dirty fluid) Fd discharged from a grinding machine in a paper filter device, and contains a mixture of magnetic metal powder generated from magnetic workpieces such as steel when ground by a grinding wheel, and crushed powder of abrasive grains and binding material generated from the grinding wheel.

A grinding fluid chute plate (machining fluid chute plate) 26 is provided on the outer peripheral surface 12a of the rotating drum 12, further upstream in the rotation direction A1 than the pressing portion of the squeezing roller 14. The grinding fluid chute plate 26 slides against the outer peripheral surface 12a, and guides the grinding fluid (machining fluid) Fd that flows down along the outer peripheral surface 12a from the pressing portion of the squeezing roller 14 diagonally downward away from the outer peripheral surface 12a of the rotating drum 12, causing the grinding fluid Fd to fall into a grinding fluid recovery box (machining fluid recovery box) 28 located directly below the lower end of the grinding fluid chute plate 26.

A sludge collection box 30 is disposed below the rotating drum 12 to receive sludge Sg that falls from the downstream side of the portion of the outer circumferential surface 12a of the rotating drum 12 where the filter paper belt 22 is separated by the separating roller 16 in the rotation direction A1. The sludge collection box 30 in this embodiment has an opening with a horizontal dimension that includes the separating roller 16 and the outer circumferential surface 12a of the rotating drum 12.

In the filter paper belt processing device 10 configured as described above, the filter paper belt 22 is wound up on the winding roller 20 via the squeezing roller 14, the rotating drum 12, the separation roller 16, and the guide roller 18, as shown in FIG. 1. In this process, when the filter paper belt 22 is pressed between the squeezing roller 14 and the rotating drum 12, the grinding fluid Fd contained in the filter paper belt 22 and the sludge Sg thereon is squeezed out. The squeezed out grinding fluid Fd flows down the outer circumferential surface 12a of the rotating drum 12 and the grinding fluid chute plate 26, and is received in the grinding fluid recovery box 28. The sludge Sg from which the grinding fluid Fd has been squeezed out and the filter paper belt 22 rotate together with the outer circumferential surface 12a of the rotating drum 12, and when it reaches the separation roller 16, the filter paper belt 22 is separated from the sludge Sg on the outer circumferential surface 12a by the separation roller 16. The filter paper belt 22 is wound onto the winding roller 20 via the guide roller 18, while the sludge Sg on the outer peripheral surface 12a falls due to gravity and is received in the sludge collection box 30.

As described above, the filter paper belt processing device 10 of this embodiment recovers the grinding fluid Fd contained in the filter paper belt 22 and the sludge Sg from the filter paper belt 22 to which the sludge Sg containing magnetic metal powder is attached, and can separate the sludge Sg without damaging the filter paper belt 22. It includes a rotating drum 12 that is driven to rotate in one direction around a predetermined rotation center line C1, a squeezing roller 14 that is rotatably arranged at a position upstream of the uppermost position P1 in the rotation direction A1 of the rotating drum 12 while pressing the filter paper belt 22 with the filter paper belt 22 wrapped around it, and a separation roller 16 with a smaller diameter than the rotating drum 12 that is arranged at a position downstream of the uppermost position P1 in the rotation direction A1 of the rotating drum 12 and separates the filter paper belt 22 that has moved together with the rotating drum 12 from the squeezing roller 14 from the outer circumferential surface 12a of the rotating drum 12.

According to the filter paper belt processing device 10, after the filter paper belt 22 is pressed between the squeezing roller 14 and the rotating drum 12, it moves together with the outer peripheral surface 12a of the rotating drum 12, passes through the top position of the rotating drum 12, and is separated from the outer peripheral surface 12a of the rotating drum 12 by the peeling roller 16 located downstream in the rotation direction A1 of the rotating drum 12. During this process, when the filter paper belt 22 is pressed between the squeezing roller 14 and the rotating drum 12, the grinding fluid Fd contained in the filter paper belt 22 and the sludge Sg thereon is squeezed out. Next, when the filter paper belt 22 reaches the peeling roller 16, which has a smaller diameter than the rotating drum 12, the filter paper belt 22 is peeled off from the sludge Sg on the outer peripheral surface 12a by the peeling roller 16 with a radius of curvature smaller than that of the rotating drum 12 similar to that of the peeling roller 16, and the sludge Sg on the outer peripheral surface 12a falls according to gravity. This allows the grinding fluid Fd contained in the filter paper belt 22 to be efficiently recovered, and the sludge Sg can be separated without damaging the filter paper belt 22.

In addition, according to the filter paper belt processing device 10 of this embodiment, a magnet 24 is provided at a fixed position inside the rotating drum 12 and generates a magnetic force that attracts the magnetic metal powder contained in the sludge Sg to the outer circumferential surface 12a of the rotating drum 12 at the pressing portion by the squeezing roller 14 and the separating portion of the filter paper belt 22 by the separating roller 16. As a result, at the pressing portion by the squeezing roller 14, the magnetic force of the magnet 24 suppresses the sludge Sg from flowing down, and at the separating portion of the filter paper belt 22 by the separating roller 16, the magnetic force of the magnet 24 separates the sludge Sg from the filter paper belt 22 to the outer circumferential surface 12a of the rotating drum 12 and holds it there, so that the grinding fluid Fd contained in the filter paper belt 22 is efficiently recovered and the sludge Sg can be suitably separated without damaging the filter paper belt 22.

The filter paper belt processing device 10 of this embodiment also includes a grinding fluid chute plate 26 that slides in contact with the outer peripheral surface 12a of the rotating drum 12 at a position upstream of the pressing portion of the squeezing roller 14 in the rotation direction A1 of the rotating drum 12 and guides the grinding fluid Fd that flows down from the pressing portion of the squeezing roller 14 along the outer peripheral surface 12a of the rotating drum 12 away from the outer peripheral surface 12a of the rotating drum 12, and a grinding fluid recovery box 28 that receives the grinding fluid Fd that falls from the grinding fluid chute plate 26. As a result, the grinding fluid Fd does not flow downward along the outer peripheral surface 12a of the rotating drum 12, and the grinding fluid Fd that attempts to flow down along the outer peripheral surface 12a of the rotating drum 12 is efficiently recovered in the grinding fluid recovery box 28.

The filter paper belt processing device 10 of this embodiment also includes a winding roller 20 that winds up the filter paper belt 22 and applies tension to the filter paper belt 22, and a guide roller 18 that guides the filter paper belt 22, which has been detached from the outer peripheral surface 12a of the rotating drum 12 by the separating roller 16, to the winding roller 20. As a result, the filter paper belt 22 from which the sludge Sg has been efficiently separated is wound up on the winding roller 20 and collected.

Next, a filter paper belt processing device 50 according to another embodiment of the present invention will be described with reference to FIG. 2. In the following, parts common to the first embodiment described above will be given the same reference numerals and will not be described.

The filter paper belt processing device 50 of this embodiment differs from the filter paper belt processing device 10 of the previously described embodiment 1 in that it includes a sludge chute plate 52 and a sludge collection box 54 that receives the sludge Sg that falls from the sludge chute plate 52, but is otherwise similar. The filter paper belt processing device 50 of this embodiment is equipped with a grinding fluid chute plate 26 and a grinding fluid collection box 28, just like the filter paper belt processing device 10 of the previously described embodiment 1.

The filter paper belt processing device 50 of this embodiment is provided with a sludge chute plate 52 that slides in contact with the outer peripheral surface 12a of the rotating drum 12 at a position downstream of the position of the separating roller 16 in the rotation direction A1 of the rotating drum 12 and guides the sludge Sg carried along with the outer peripheral surface 12a of the rotating drum 12 away from the outer peripheral surface 12a of the rotating drum 12, and a sludge collection box 54 that receives the sludge Sg that falls from the sludge chute plate 52.

According to the filter paper belt processing device 50 of this embodiment, the sludge Sg is not transported in the rotation direction of the rotating drum 12 while remaining attached to the outer circumferential surface 12a of the rotating drum 12 and falls into the grinding fluid recovery box 28, and the sludge Sg transported along with the outer circumferential surface 12a of the rotating drum 12 is efficiently collected in the sludge recovery box 54.

Next, a filter paper belt processing device 80 according to another embodiment of the present invention will be described with reference to FIG. 3. In the following, parts common to the above-mentioned embodiment 2 will be given the same reference numerals and will not be described.

The filter paper belt processing device 80 of this embodiment differs from the filter paper belt processing device 50 of the above-mentioned embodiment 2 in that the grinding fluid chute plate 26 has been removed. The grinding fluid recovery box 28 of this embodiment has an opening dimension that sufficiently covers the radius of the rotating drum 12 from just below the lowest position (lowest point) P2 of the outer circumferential surface 12a of the rotating drum 12.

The filter paper belt processing device 80 of this embodiment also provides the same effects as the filter paper belt processing device 10 of the above-mentioned embodiment 1 and the filter paper belt processing device 50 of embodiment 2.

The present invention has been described in detail above with reference to tables and drawings, but the present invention can be embodied in other forms and various modifications can be made without departing from the spirit of the invention.

For example, in the filter paper belt processing devices 10, 50, and 80 of the above-mentioned embodiments, magnets 24 were provided at the inner position of the rotating drum 12 at the portion where the squeezing roller 14 presses against the rotating drum 12, and at the inner position of the rotating drum 12 at the portion where the filter paper belt 22 is separated from the outer peripheral surface 12a of the rotating drum 12 by the separating roller 16, but at least one of the magnets 24 provided at these positions does not necessarily have to be provided.

The positions at which the grinding fluid chute plate 26 and the sludge chute plate 52 are provided do not necessarily have to be as shown in FIG. 2, and a single member serving as both the grinding fluid chute plate 26 and the sludge chute plate 52 may be provided extending downward from the lowest position P2 of the outer circumferential surface 12a of the rotating drum 12.

In addition, the filter paper belt processing devices 10, 50, and 80 in the above-mentioned embodiments process the filter paper belt 22 that has been filtered from the grinding fluid Fd discharged from a grinding machine, but they may also process cutting fluid discharged from a drill press, milling machine, machining center, etc. In short, any device that processes processing fluid used in cutting machines or grinding machines will do.

The above is merely one embodiment of the present invention, and various modifications can be made to the present invention without departing from the spirit of the invention.

10, 50, 80: Filter paper belt processing device 12: Rotating drum 12a: Outer circumferential surface 14: Squeezing roller 16: Separation roller 18: Guide roller 20: Winding roller 22: Filter paper belt 24: Magnet 26: Grinding fluid chute plate (machining fluid chute plate)
28: Grinding fluid recovery box (machining fluid recovery box)
30, 54: Sludge collection box 52: Sludge chute plate C1: Rotation center line Sg: Sludge Fd: Grinding fluid (machining fluid)

Claims (5)

A filter paper belt treatment device capable of recovering a processing liquid contained in a filter paper belt and sludge adhering thereto, and separating the sludge from the filter paper belt without damaging the filter paper belt, comprising:
A rotary drum that is rotated in one direction around a predetermined rotation center line;
a squeeze roller that is rotatably provided at a position upstream of the uppermost position of the rotary drum in the rotation direction of the rotary drum while pressing the filter paper belt around the filter paper belt;
a separating roller having a smaller diameter than the rotating drum, the separating roller being disposed downstream in the rotation direction of the rotating drum from the uppermost position of the rotating drum, and separating the filter paper belt that has moved together with the rotating drum from the squeezing roller from the outer peripheral surface of the rotating drum. The filter paper belt processing device according to claim 1, further comprising a magnet which is fixedly positioned inside the rotating drum and generates a magnetic force that attracts the magnetic metal powder to the outer peripheral surface of the rotating drum at the area pressed by the squeezing roller and the area separated by the separating roller. a machining fluid chute plate that comes into sliding contact with the outer circumferential surface of the rotating drum at a position upstream of the pressing portion of the rotating drum in the rotation direction of the rotating drum and guides the machining fluid that flows down along the outer circumferential surface of the rotating drum from the pressing portion of the squeezing roller, away from the outer circumferential surface of the rotating drum;
3. The filter paper belt treating apparatus according to claim 1, further comprising: a processing fluid recovery box for receiving the processing fluid dropping from the processing fluid chute plate. a take-up roller that takes up the filter paper belt and applies tension to the filter paper belt;
4. The filter paper belt treating apparatus according to claim 1, further comprising: a guide roller for guiding the filter paper belt separated from the outer circumferential surface of the rotating drum by the separating roller to the take-up roller. a sludge chute plate that comes into sliding contact with the outer circumferential surface of the rotating drum at a position downstream in the rotation direction of the rotating drum from a portion of the outer circumferential surface of the rotating drum that is separated by the separating roller, and that guides the sludge that is carried along with the outer circumferential surface of the rotating drum away from the outer circumferential surface of the rotating drum;
5. The filter paper belt treating apparatus according to claim 1, further comprising: a sludge collection box for receiving the sludge dropping from the sludge chute plate.

Images