TWI626354B - Teeth for disperser plate segment and disperser plates having grooves and taper - Google Patents

Abstract

A disperser disk segment for removing contaminants from a fibrous material comprising: a radially inner and outer edge; a plurality of radially concentric rows of teeth; each of the rows of teeth having a defined distribution in the middle of the teeth a plurality of teeth of each channel; each channel having an underlying channel base surface, and each tooth comprising: a top surface, at least one positive surface extending from the channel base surface to the top surface; and the at least one positive surface comprising at least Two grooves.

Description

For the disc section with the groove and taper and the teeth of the disperser disc

The present disclosure relates to a disperser disk segment.

Recycled paper and packaging materials are referred to by those skilled in the art as "fiber stock." The fiber raw material is usually subjected to several processes to remove the ink and toner of the copy paper. Contaminants such as plastic are collectively referred to by those skilled in the art as "stickies." The removal process is not completely effective, and the residual ink, toner, and stickies are typically dispersed to prevent the stickies from sticking to the parts of the paper machine, resulting in holes or weak spots in the new paper. Adhesive agglomeration and build-up on the paper machine can result in idle time, which increases the cost of the manufacturing process. Residual ink particles are typically shown as spectacles on recycled paper, severely degrading their value.

A machine called a disperser can be used to reduce the size of the ink and stickies particles so that the quality of the paper can be minimally compacted in subsequent paper machine operations. The disperser typically has two discs that face each other. While one disk, commonly referred to as a turntable, rotates, the other disk, called the static disk, is stationary. Conical machines are also used where the rotating cone moves while the stationary cone normally remains stationary.

The disc or cone surface may be fitted with a disk segment with vertebral bodies or teeth mounted along a tangential row. These rows are typically selected at a radius that allows the cross-cut and the teeth of the stationary disk to lie between the disk or cone, such that fibers flowing from the center of the disk to the periphery of the disk or cone are typically received as they flow closer to the disk teeth. The impact from the carousel teeth. The gap between the teeth of the turntable and the stationary disk is about 1 to 12 mm so that the fibers are usually not cut, but are typically bent alternately. This action typically breaks the ink and toner particles into smaller particles and decomposes the sticky particles. Fresh, viscous surfaces are generally considered to collect fine fiber particles and are further passivated into smaller particles. Increasing the number of bends, experience has shown that fibers generally increase the unwanted particle reduction process. Adding more teeth usually increases the efficiency of the dispersion process, but the size of the teeth that can be manufactured at a reasonable cost limits this amount. A conventional disperser disk as described in US 7,172,148, a single groove extends from the top surface of the tooth to a point intermediate the top surface and the channel base surface.

For a conical disperser, the cone includes a vertebral body or tooth, and the same action usually occurs and the design of the tooth is substantially the same as that of a flat disk.

By increasing the number of edges contacting the fiber stock, the efficiency of dispersion can be increased and the amount of ink, toner and stickies entering the paper machine can be reduced. By providing grooves on one or more sides of the teeth, the number of contact edges can be increased while substantially maintaining the structural integrity of the teeth. The plane defined by the sides of the teeth is referred to throughout the article as the "face surface."

a disperser disk segment for removing contaminants from a fibrous material material, the disk segment comprising: a radially inner edge and a radially outer edge, a plurality of radially concentric rows of teeth, each row of teeth having a plurality of channels defining between the teeth a plurality of teeth, each channel having a lower channel base surface, and each tooth comprising: a top surface, at least one front surface extending from the channel base surface to the top surface, wherein at least one of the front surfaces comprises at least two grooves.

At least one tooth has a plurality of grooves on at least one surface thereof. The grooves attached to the front surface of the teeth help to increase the circumferential friction on the material between the bonded rows of teeth, thereby improving the separation of the soil from the desired material. As the teeth move material vertically between the channel base surface and the tooth top surface, it is helpful to change the direction of the material along the tooth height axis by using grooves that are angled relative to the vertical axis of the front surface of the tooth surface.

The inner and outer surfaces of each tooth extend from the channel base surface to the top surface at an acute angle such that the teeth may be truncated pyramidal. A tooth having a plurality of grooves, the top surface portion separating the inner surface and the outer surface groove from each other when the groove extends to the top surface of the tooth. Furthermore, for multi-groove teeth, the top surface portion will be separated along the groove of the front surface; this front surface may be the inner front surface or the outer front surface. In some embodiments, the front surface may be a side surface that limits the teeth of the passage between the two teeth.

In some embodiments, the grooves of the medial front surface and the outer front surface may be tapered. For example, at least one groove having a width that tapers outwardly from the top surface toward the channel base surface on the front surface. In another embodiment, the depth of the groove enters or tapers from the front surface toward the tooth/material as the groove extends from the top surface toward the channel base surface. In embodiments involving a tapered groove, the top surface portion separates the inner front surface and the outer front surface groove from each other.

In some embodiments, the width of the at least one groove varies along its length. For example, at least one of the grooves gradually decreases outward on the front surface of the tooth. In another embodiment, the depth of the at least one groove varies along its length. When the groove extends over the front surface of the channel over the front surface of the tooth, the depth of the at least one groove gradually increases inwardly of the front surface of the tooth. In some embodiments, the grooves cannot be connected to each other through the teeth. In other embodiments, at least two groove connections are possible.

Each tooth may also have a relatively arranged source and trailing edge. The groove of the inner front surface of each tooth and the groove of the outer front surface of each tooth define an additional leading edge and an additional trailing edge.

In one disclosed embodiment, the plurality of grooves on the medial front or outer front surface of the teeth extend substantially the same length between the top surface and the channel base surface, from the top surface to the top surface and the channel base surface A point in the middle.

In another embodiment of the present disclosure, the plurality of grooves on the inner front or outer front surface of the teeth extend the same length between the top surface and the channel base surface, such as at least one groove extending from the top surface of the tooth to Or substantially to the base surface of the channel.

In another embodiment of the present disclosure, a plurality of grooves on the inner front or outer front surface of the teeth extend different lengths between the top surface and the channel base surface. E.g., one or more grooves extending from the top surface to the channel base surface, and one or more grooves extending from the top surface to a lower end below the groove between the top surface and the channel base surface, and one or more grooves Extending upwardly from the channel base surface but less than the top surface, and one or more grooves extending from below the top surface to a point intermediate the channel base surface.

In yet another embodiment, the width of a single groove on the medial front or outer front surface of the teeth can vary. The width of a single groove on the inner front or outer front surface may also vary along any single tooth. For example, a groove may have a width that is wider than the remaining grooves on the front surface of the tooth. The length of each groove, whether broad or narrow, may be any of the aforementioned lengths, such as the entire length from the top surface to the channel base surface, or the length of a point from the top surface to the top surface and the channel base surface, or The length from a base surface of the channel to a point below the top surface. Additionally, one or more grooves extend from below the top surface to a point intermediate the surface of the channel base.

In yet another embodiment of the present disclosure, a plurality of tapered grooves of variable length (as previously described) are present on the medial front or outer positive surface of the teeth.

In another embodiment of the present disclosure, the grooves on the inner front or outer front surface are angled relative to the vertical axis of the front surface of the tooth surface, and each groove may be the same length or a different length. The angled grooves may have the same width or different widths and have a taper. Both the width and the depth of the groove can be gradually reduced. Conversely, one of the width and depth of the groove may be tapered. The angle of the groove can be from about 5 degrees to about 60 degrees.

A disperser disk segment envisioned to remove dirt from a fibrous material, comprising: a radially inner and outer edge and a plurality of radial concentric rows of teeth; each row of teeth having a plurality of teeth defined in the middle of the teeth a plurality of teeth of the channel; each channel having a lower channel base surface, and each tooth comprising: a top surface, at least one positive surface extending from the channel base surface to the top surface, the at least one positive surface defining relative to The vertical axis of the front surface is at least two grooves of an angle θ.

Both the inner front surface in one embodiment of the present disclosure and the outer front surface or the inner front surface and the outer front surface in another embodiment are possible in the same embodiment of the present disclosure. In yet another embodiment, any combination of the previously described grooves on any tooth surface can be used.

The disperser disk includes: a plurality of radially concentric rows of teeth, wherein each row is configured to engage with a row of teeth on the opposing disk; adjacent teeth of the radially concentric rows define channels between adjacent teeth, wherein each The channels are aligned with the respective rows of teeth on the opposing disk, and the plurality of grooves are on the front surface of each of the teeth on the at least one concentric row.

In addition, the disperser disk can be divided into disperser disk segments. In some embodiments, the disperser disk has teeth in at least one concentric row, each tooth having an upper surface and a groove of a top surface of a respective tooth extending from one channel. In at least some embodiments of the disperser, the depth of at least one groove on each tooth varies along the length of the high groove. In some embodiments, the groove portion extends along the height of the teeth and the grooves are parallel. In other embodiments, the groove is inclined to the plane of rotation of the disperser disk. In at least some embodiments, the width of at least one groove of each tooth is different than the width of at least one other groove on the tooth.

10. . . Traditional disk segment

12. . . Turntable

13. . . Static plate

14. . . Turntable segment

15. . . Static disk segment

19. . . Common central axis

twenty two. . . Inner edge

twenty four. . . Outer edge

26. . . Concentric row

28,100,200,300,400,500,600,800,900. . . tooth

30. . . gap

31. . . set

32. . . radius

110,210,310,410,510,910. . . Groove

120,220,320,420,520,920. . . Top surface

130,230,330,430,530,930. . . Base surface

140,240,340,440,540,640,740,840,940. . . Positive surface

150,250,350,450,950. . . width

160,360,460. . . depth

255,655,755,855. . . point

560. . . First depth

570. . . Second depth

580. . . Top inner back

590. . . Minimum inner back

612,713. . . Left side

613,712. . . Right

621,721,821,822. . . Opening

812. . . Second shallow side

813. . . Sharp side

818. . . First shallow side

965. . . length

The above description is made clear by the detailed description of the embodiments shown in the accompanying drawings, in which the same reference features refer to the same parts. The drawings are not necessarily to scale, the

Figures 1a, 1b and 1c show a conventional disperser with a disk segment.

Figure 2 shows a schematic view of a tooth having a plurality of grooves of similar length and width.

Figure 3 shows a schematic view of a tooth having a plurality of grooves of different lengths.

Figure 4 shows a schematic view of a tooth having a plurality of grooves of a plurality of different widths.

Figure 5 shows a schematic view of a tooth having a groove with a gradually decreasing width.

Figure 6 shows a schematic view of a tooth having a groove with a progressively decreasing depth.

Figure 7 shows a schematic view of a tooth having an asymmetrical shape with a progressively decreasing depth.

Figure 8 is a mirror image of Figure 7.

Figure 9 shows a top schematic view of the teeth of a plurality of grooves having different shapes.

Figure 10 shows a schematic view of a tooth with angled grooves.

Increasing the number of contact edges for the material can increase the decomposition of dirt and stickies in the fiber material and increase the efficiency of the disperser.

A disperser disk segment in accordance with any of the embodiments of the present disclosure has at least one tooth, the inner or front positive surface of the tooth comprising at least two grooves. The groove length, the width, the shape, the groove having a gradually decreasing width, the groove having a gradually decreasing depth or the inner front surface or the angled groove on the outer front surface may be arbitrarily combined.

Although the grooves are depicted as being round, cylindrical or conical in the middle, the grooves may be triangular, pyramidal or quadrilateral in other embodiments.

Figures 1a, 1b and 1c show a conventional disk segment 10 of a disperser. In Fig. 1a, the conventional disk segment 10 is a static disk segment 15. Each of the conventional disk segments 10 is a molded metal piece that is in the form of a cake, such as a ring-shaped wedge, having a total planar substrate. However, the conventional disk segment 10 may be circular or semi-circular, and the substrate may be conical or partially conical. Each conventional disk segment 10 has an inner edge 22 that faces a common central axis 19 of a disk (not shown) to which the conventional disk segment 10 is secured. Each of the conventional disk segments 10 also has an outer edge 24 adjacent the outer periphery of a disk (not shown) that is fixed to the conventional disk segment 10. Each conventional disk segment 10 has a concentric row 26 of teeth 28. Those skilled in the art will regard the teeth 28 as pyramidal (vertebral). Each concentric row 26 of teeth 28 is at the same radial distance (e.g., radius 32) from the common central axis 19.

Figure 1b is a cross-sectional view of a stationary disk segment 15. When the fiber stock (not shown) contacts the disk segment 15 near the inner edge 22 of the disk segment 15, the fiber material flows through the concentric rows 26 of teeth 28 to the outer edge 24 of the disk segment 15.

Fig. 1c is a cross-sectional view of the turntable 12 and the stationary disk 13 disposed opposite each other. The stationary disk 13 has an annular array of stationary disk segments 15 and the turntable 12 has an annular array of rotating disk segments 14.

The teeth 28 on the turntable segment 14 are combined with the rows of teeth of the array of stationary disk segments 15, as shown in Figure 1c. The mutually coupled teeth 28 traverse the radially extending plane in the gap 30 between the turntable 12 and the stationary disk 13.

The array of turntable segments 14 on the turntable 12 and the array of open disk segments 15 on the stationary disk 13 are typically rotated about a common central axis 19.

As the turntable 12 rotates, the fiber stock (not shown) typically moves as a fiber feed mat through the serpentine gap 30 between the array of stationary disk segments 15 and the array of turntable segments 14. As the pad moves between the teeth 28, the bending of the fiber material pulls the glue out of the fibers in the fiber material.

The rotation of the turntable 12 and the turntable segment 14 exerts a centrifugal force that moves the fiber stock through the gap 30 between the opposing arrays of segments. As the fiber stock moves radially beyond the outer edge 24 of the carousel segment 14 and the disk segment 15, the fiber material enters the sleeve 31 of the disperser.

Elements that remain the same in the figures use the same reference numerals. Figure 2 shows the front surface 140 of the tooth 100 having grooves 110 of substantially the same length. The groove 110 extends from the top surface 120 of the tooth 100 to the channel base surface 130. The width 150 and depth 160 of each groove 110 are approximately or substantially the same.

FIG. 3 shows the front surface 240 of the teeth 200 having grooves 210 of different lengths. The groove 210 extends from the top surface 220 to the channel base surface 230, or from the top surface 220 to a point 255 intermediate the top surface 220 and the channel base surface 230, or a point below the channel base surface 230 to the top surface 220, or One or more grooves 210 extend from a point below the top surface 220 to a point intermediate the channel base surface 230, or have a groove 210 having at least one length different from the other grooves 210, having the same or substantially the same width Any combination of 250 and groove 210 of depth 260.

Figure 4 shows the front surface 340 of the tooth 300 having the same length of groove 310. In other embodiments, the length of the grooves can be different. The groove 310 can extend from the top surface 320 to the channel base surface 330, or from the top surface 320 to a point between the top surface and the channel base surface 330, or a point below the channel base surface 330 to the top surface 320, or The one or more grooves 310 extend from a point below the top surface 320 to a point intermediate the channel base surface 330, or have at least one groove having a length different from the other grooves 310, having at least one width 350 different from the other recesses Any combination of grooves 310 of the slot 310. The depth 360 of the groove 310 entering the tooth 300 varies in a direction toward the top of the tooth or in the opposite direction, such as linearly. Moreover, the depth 360 of the groove 310 varies from the groove 310 to the groove 310 on the same tooth 300.

FIG. 5 shows the front surface 440 of the tooth 400 having a single groove 410. The width 450 of the groove 410 tapers from the narrowest point at or near the top surface 420 to the widest point at or near the channel base surface 430. While the width 450 of the groove 410 tapers along the front surface 440, the depth of the groove 410 varies while the depth 460 and length of the groove 410 remain the same or the depth 460 of the groove remains the same.

FIG. 6 shows the front surface 540 of the tooth with a single groove 510. The groove 510 has a first depth 560 that tapers from the top surface 520 to a second depth 570 at the lowest point of the groove 510. The first depth 560 can be measured as the distance between the front surface 540 and the top inner back 580 of the groove 510 of the top surface 520. The lowest point of the groove 510 may be the point closest to the channel base surface 530. The second depth 570 can be measured as the distance between the front surface 540 and the lowest inner back 590 of the groove 510. The taper of the groove 510 increases from a first depth 560 to a second depth 570 and is, for example, from about 1 mm to about 10 mm, or perhaps from about 2 mm to about 10 mm, or perhaps from about 1 mm to about 3 mm, or perhaps from about 2 mm to about 5 mm, and therebetween. Any size. The groove 510 has a variable taper depth, wherein the first depth 560 and the second depth 570 may be the same for each groove 510 or may be different. In addition to having different depths in the grooves 510, the depth of each groove 510 can be gradually reduced. Moreover, the length of the groove 510 on the front surface 540 can vary as the first depth 560 and the second depth 570 change. The upper end of the groove 510 is located at any point between the channel base surface 530 and the top surface 520, while at or near the channel base surface 530 is the lowest point of the groove 510, or the groove 510 extends from the top surface 520 to the channel base surface. One point in the middle of 530, or having a groove 510 disposed along front surface 540 but not extending to top surface 520 and channel base surface 530 while at least one groove 510 has a first depth 560 and a second depth 570. Not shown in Figure 6, the depth of the groove is greater than the top of the tooth 500 compared to the bottom of the tooth 500.

Figure 7 shows a top view of a tooth 600 having an asymmetrical shape with progressively decreasing depth. At the left side 612 of the opening 621, the angle from the front surface 640 to the innermost point 655 of the groove is shallow and pointed, such as less than about 90 degrees. On the right side 613, the angle from the front surface 640 to the point 655 at the innermost side of the groove is about 90 degrees. In some embodiments, the angle from the front surface 640 to the point 655 at the innermost edge of the groove is symmetrical. In other embodiments, the angle from the front surface 640 to the innermost point 655 of the groove is asymmetrical.

Figure 8 shows a top view of the mirror image of Figure 7, with asymmetrical shaped teeth 700 having a progressively decreasing depth. At the right side 712 of the opening 721, the angle from the front surface 740 to the innermost point 755 of the groove is shallow and pointed, such as less than about 90 degrees. On the left side 713, the angle from the front surface 740 to the point 755 at the innermost edge of the groove is about 90 degrees. In some embodiments, the angle from the front surface 740 to the point 755 at the innermost edge of the groove is symmetrical. In other embodiments, the angle from the front surface 740 to the point 755 at the innermost edge of the groove is asymmetrical.

Figure 9 shows a top view of the teeth 800 of a plurality of grooves, the teeth 800 being any combination of the shapes shown in Figures 7 and 8. As shown in FIG. 9, the opening 821 has the shape of an opening 621 (see FIG. 7). At the first shallow side 818, the angle from the front surface 840 to the innermost point 855 of the groove is shallow and pointed, such as less than about 90 degrees. At the pointed side 813, the angle from the front surface 840 to the point 855 at the innermost edge of the groove is about 90 degrees. The opening 822 has the shape of an opening 721 (see Fig. 8). At the second shallow side 812, the angle from the front surface 840 to the innermost point 855 of the groove is shallow and pointed, such as less than about 90 degrees. At the pointed side 813, the angle from the front surface 840 to the point 855 at the innermost edge of the groove is about 90 degrees. In other embodiments, a groove using at least one of the structures of Figure 7 or Figure 8 can be used for at least one tooth.

FIG. 10 shows a front surface 940 of a tooth 900 having a top surface 920, a channel base surface 930, and a groove 910. The grooves 910 are arranged at an angle θ of between about 5 degrees and about 60 degrees. In other embodiments, the angle θ may be between about 10 and about 60 degrees, or may be between about 30 degrees and about 60 degrees with respect to the vertical axis of the front surface 940 of the tooth 900. In some embodiments, the angle θ can vary in at least one groove on the same tooth of the disperser. In some embodiments, the angle θ varies between at least one groove on a different tooth on the disperser. The angle θ allows the edges of the grooves to be combined with fiber materials of different angles to increase the number of edges contacting the fiber material and to change the direction of the fiber material in a manner that improves dispersion. In contrast, the angle θ of a conventional groove on a conventional disperser disk tooth is about zero degrees. The grooves 910 are shown as having different lengths 965 and the same width 950. In some embodiments, the grooves 910 also have the same depth (not shown). The grooves 910 can have different widths 950 and the same length 965 and the same depth. In other embodiments, the grooves 910 can have the same width and different heights. In another embodiment, the length of the at least one groove extends through the front surface of the at least one tooth. In some embodiments, as the groove 910 passes through the front surface 940, the width 950 of the groove 910 forms a taper from narrow to wide. In some embodiments, as the groove 910 passes through the front surface 940, the depth may taper from shallow to deep. Combinations of the above embodiments are also possible.

The preferred embodiment is shown and described, and various changes and substitutions may be made without departing from the spirit and scope of the invention. Therefore, it is to be understood that

Claims (18)

A disperser disk segment for removing contaminants from a fibrous material comprising: a radially inner and outer edge; a plurality of radially concentric rows of teeth; each of the rows of teeth having a defined distribution in the middle of the teeth a plurality of teeth of each channel; each channel having a lower channel base surface, and each tooth comprising: a top surface, and at least one positive surface extending from the channel base surface to the top surface; wherein the at least one front surface At least two grooves are included, and wherein the width of at least one of the grooves on the front surface is different from the width of the other grooves on the front surface. A disperser disk segment according to claim 1, wherein at least one of the grooves extends from the top surface to the channel base surface. A disperser disk segment according to claim 1, wherein at least one of the grooves has a lowermost end than a top surface of the at least one tooth. A disperser disk segment according to claim 1, wherein at least one of the grooves has a lowest end intermediate the top surface of the at least one tooth and the channel base surface. A disperser disk segment according to claim 1, wherein the width of at least one of the grooves varies along the length such that the length tapers outwardly on the front surface. A disperser disk segment according to claim 1, wherein the depth of at least one of the grooves varies along the length such that the length tapers into the front surface. A disperser disk segment for removing contaminants from a fibrous material, comprising: a radially inner and outer edge and a plurality of radially concentric rows of teeth; each of the rows of teeth having a defined distribution in the middle of the teeth a plurality of teeth of each channel; each channel having a lower channel base surface, and each tooth comprising: a top surface, at least one positive surface extending from the channel base surface to the top surface, the at least one positive surface defining a relative At least two grooves at an angle θ of the vertical axis of the front surface, and wherein the width of at least one of the grooves on the front surface is different from the width of the other grooves on the front surface. Dispersing machine segment according to claim 7, wherein the angle θ is 5 degrees Between 60 degrees. The disperser disk segment of claim 7, wherein the length of at least one of the grooves on the front surface is different from the length of the other grooves on the front surface. A disperser disk segment according to claim 7, wherein the width of at least one of the grooves varies along the length such that the length tapers outwardly as the groove extends over the front surface. The disperser disk segment of claim 7, wherein the depth of at least one of the grooves varies along the length such that the groove tapers inwardly toward the channel base surface over the front surface. A disperser disk comprising: a plurality of radially concentric rows of teeth, wherein each row of teeth is configured to engage between rows of teeth on opposing disks; adjacent teeth of the radially concentric rows of teeth define between adjacent teeth Channels, wherein each channel is aligned with a corresponding row of teeth on the opposing disk, and the plurality of grooves are on a front surface of each of the teeth on the at least one concentric row, and wherein the width of at least one of the grooves on the front surface Different from the width of other grooves on the front surface. A disperser disk according to claim 12, wherein the disperser disk is divided into disk segments. A disperser disk according to claim 12, wherein each of the teeth on at least one row of the radially concentric rows of teeth has an upper surface and a groove extending from one channel to a top surface of the respective tooth. A disperser disk according to claim 12, wherein the depth of at least one groove on each tooth varies along the length of the groove. A disperser disk according to claim 12, wherein at least one portion of the groove extends along the height of the tooth. A disperser disk according to claim 12, wherein the grooves are parallel. A disperser disk according to claim 12, wherein the groove is inclined to a plane in which the disk rotates.