JP2002522660A - Refined plate for papermaking and method for producing the same - Google Patents

Abstract

(57) An exchangeable refining filler (10) used for refining lignocellulose and natural and synthetic fiber materials in papermaking. The refining filler (10) includes a pattern of blades (14) and spacers (16) defined by a bar population (24), the bar population comprising a base to form the filler (10). Become. In the manufacturing method, a population pattern is provided based on factors including the pumping angle, the plurality of segments in the filler and the number of populations in the segment. A bar set population is defined for the production of the bar population (24) for the refining packing (10).

Description

DETAILED DESCRIPTION OF THE INVENTION

FIELD OF THE INVENTION The present invention relates to a refining plate for refining lignocellulose and natural and synthetic fibrous materials used for papermaking and for the manufacture of papermaking, paperboard and fiberboard products. More particularly, the present invention relates to an exchangeable refining filler and a method for producing the same.

BACKGROUND OF THE INVENTION In almost all cut or formed and cast refining plates, the working surface of the refining plate is made up of groups of parallel bars and grooves. Although the refining filler disc is usually a perfect circle, the filler often comprises several pie-shaped segments, which are easier to handle when changing the filler.

[0003] US Pat. No. 5,740,972 discloses an improved version of a replaceable refining filler which is used for the production of a refining filler with a working surface, which is closely spaced and narrow on the working surface of the plate. Bars are used. The refining filler has relatively thin blades and the shallow spacer bars separating them have a thickness that determines the width of the groove.

[0004] The refining filler uses metal or other hard and durable material for its blades and spacers, and the blades and spacers are metallically bonded together along their entire contact surface. . Known methods such as welding, diffusion bonding, and brazing are used for the metallurgical bonding, and a bonding part having a strength close to that of the blade or spacer material is formed. Materials include stainless steel blades and ceramic metal compounds bonded to carbon steel spacers. Used for blades of special metal compound fillers that exhibit appropriate strength and durability characteristics. However, a somewhat inexpensive material is used for the spacer.

[0005] As disclosed in the above-mentioned US patents, segmented exchange disc refining plates are manufactured using segments having non-circular edges (ie, side edges). The side edges are sloped to the correct radius and the refining plate segment glands are parallel to the adjacent refining blades. Each segment is 30, 45 or 6 of a circle
With zero degrees, 12, 8 or 6 segments each have a refining disc.

[0006] The blades of each county are arranged parallel to the side edges of the group and extend from the outer circumference to the inner circumference of the segment. The slope of the blade with respect to the disk radius increases with distance perpendicular to the side edges. For the refining plate, it is desirable to avoid a shallow crossing angle of the stator and rotor blades (i.e., a high degree of inclination with respect to radius), and it is desirable to keep the blade inclination at 3 to 20 degrees with respect to the disk radius.

Here, the blade pattern starts again when the increasing slope approaches 20 degrees. Thus, the segment blade pattern is repeated at intervals to keep the blade inclination in the desired range over the entire work surface of the refining filler. A repeating blade pattern is defined as a "population" and is characterized by a common population angle across the refining filler.

In order to manufacture this kind of blade group for a refining plate, there is a method of cutting individual blades and spacers. Each blade and spacer have a specific length with respect to the inner diameter, outer diameter, group angle, and the like. have. Since each element is unique and difficult to fit accurately, manufacturing is costly.

The present invention seeks to facilitate the assembly of a finely packed filler as described in the aforementioned US Patent and to reduce the manufacturing cost. In particular, the preferred working surface blade inclination with respect to the disc radius, the correspondingly collectively assembled blades and the production of refined packings having a certain pumping angle and a certain number of the same segments are possible. . The present invention also provides a bar set envelope (each bar set divided into two identical groups of blades) or parallelograms as a basic unit of work surface fabrication of blades and spacers.

SUMMARY OF THE INVENTION The present invention provides a replaceable refining filler, whose primary purpose is to provide a work surface using relatively narrow and closely spaced bars on the work surface of the plate. To produce finely packed fillers. This uses relatively thin blades, preferably made of stainless steel, separated by a shallow spacer, preferably made of carbon steel, the thickness of which defines the thickness of the groove. The combined blade and spacer are welded or joined together by an appropriate method suitable for the material.

In addition, according to the present invention, the spacers and the blades are assembled and connected to the bar sets according to a predetermined pattern, and each bar set is cut into the same group. The refining filler segments have a plurality of clusters connected to one another. In a preferred embodiment, six sets are assembled edge-to-edge and joined to form filler segments. In one preferred embodiment, the finished refined filler disk has eight segments.

In a preferred embodiment, the bar set and spacer of the blade are the basic units of manufacture, and the bar set structure or envelope is formed in a first step. The burset envelope is a parallelogram whose long edges coincide with the edges of the segments. The edge of the segment is offset from the radius of the refining disc as described in the aforementioned US patent. This shift is called the "pumping angle" of the refined packing. The pumping angle is preferably in the range from 3 to 20 degrees. The pumping angle is also defined as the angle between the first cluster blade and the disc radius, and is also the line between the blade clusters.

[0013] The number of blades and spacers containing the bar set is selected such that when the bar set is bisected, there are two identical groups. A bar set cutting line is defined between the opposing inner and outer sides of the parallelogram and the cut is made so that the bar sets are in exactly matching groups.

After the bar set parallelogram is defined, the blades and spacers are assembled in an alternating arrangement. These are all parallel to the long edges of the parallelogram and are also offset from the edges of each refining segment. After assembly, they are joined. Some blades cross the cutting line and are precut at the intersection with the cutting line.

After the bar set is cut into two identical bar clusters, one cluster is rotated 180 degrees so that its outer long edge abuts the cutting edge of the other cluster. The plurality of cut and recombined populations are assembled and combined to form a refining segment. The completed segment will be an integer multiple of the edge-to-edge population, with the first blade of each population having the same offset angle as the edge of the segment. Each group of blades has the same range of slopes relative to the disk radius.

In the method of the present invention, a group is assembled from only a small number of special blades and spacers. Many blades and spacers are the same at the manufacturing stage,
The manufacture of parts is simplified. The finished refined packing disk has approximately 1000 blades and spacers, each bar set element having 18 blades and 19 blades.
And spacers. The invention significantly reduces parts costs and facilitates group assembly.

An object of the present invention is to provide a method for manufacturing a refining plate in which a bar and a spacer are properly arranged and connected. It is another object of the present invention to enable efficient and low-cost production of a refined filler having blades and spacers of a predetermined pattern.

DETAILED DESCRIPTION OF THE INVENTION The preferred embodiment of the refining disc filler 10 of the illustrated invention has a support plate 12 on which a blade 14 and a spacer 16 are fixed. The working surface 17 and the intervening groove 18 are defined by the blade and the spacer.

As shown in FIGS. 1, 3 and 4, the filler 10 is defined by concentric outer and inner peripheral edges 20 and 22. The filler has a plurality of filler segments AB, BC and C
−A, and each segment has a plurality of bar groups 24. The inner and outer perimeters define an annular active refining zone 26 which includes all blades and spacers.

In the filler segment AB of FIG. 3, each bar group 24 has an inclined side edge 24a shifted from the disk radius R by a specific angle α which is a pumping angle.
The collective angle β is selected to yield an integer quotient when divided by 360 degrees. When the disk is divided into segments, the angles are 30, 45, 60, 90, 120 degrees, and the like.

In the case of FIG. 1, the disc diameter is 16 inches, the deviation angle α is 10 degrees, each segment is 120 degrees and includes 8 bar groups, and as a whole, the refining packing has 24 bar groups. And the group angle β is 15 degrees.

In the case of FIG. 3, the disc diameter is 26 inches, the deviation angle α is 6 degrees, each segment is 60 degrees and includes 8 bar groups, and there are 48 groups in the refining packing as a whole. , The group angle β is 7.5 degrees.

In the case of FIG. 4, the disk diameter is 34 inches, 8 segments of 6 groups, and the group angle β.
7.5 degrees and the pumping angle α is 10 degrees.

In the present invention, the collective envelope must match between the inner and outer edges of the active refining zone of the circular filler and between two or less collective edges 24a-b, the edges being an integral number of circles Is divided into groups.

The active refining zone 26 shown in FIG. 4 is divided into eight identical segments, each segment being defined by a tangent 30 tangent to an inner circle 32. Also, each segment is divided into the same bar group envelope 36 by a tangent or radius ab of the group 24. The radius 32 of the inner circle determines the pumping angle by a known calculation.

Each bar group envelope 36 has an outer peripheral edge 2 between adjacent group radii 24a-24b.
It is defined by the chord 38 along 0 and by a line 40 parallel to the outer chord 38 and passing through the intersection I of the inner periphery 22 and the radius 24a. In the finished refining filler all the blades and spacers are located within the thus defined collective envelope 36.

In manufacturing, first, a parallelogram bar set pattern or an envelope is prepared. The bar set envelope receives the correct number of blades and spacers within the outer contour and is cut into equal pieces to form two identical bar populations. The population 24 of refined packings is all produced in this way. Adjacent bar set group 2
The contour of 4I-r is defined by the inclined side edges 24a and 24b, the outer chord 38, the inner line 40 and the cutting line CC as shown in FIG.

The bar set collective contour 24I on the left in FIG. 6 forms a bar set envelope or parallelogram 42, as also shown in FIG. The bar set envelope 42 comprises a pair of bar clusters having parallel inclined side edges 24a, 24b, the clusters abutting along the cutting edges CC. The ends of the bar set envelope parallelogram are formed by chords 38 and parallel lines 40. 6 and 7, one group 24r is in the correct operating position and the other group 24I is rotated 180 degrees from the parallelogram pattern.

FIG. 6 shows the operation position of the adjacent group 24Ir, and the cutting edge CC appears at the left edge of each group. In FIG. 7, the cut edge CC defines the line at which the assembled bar and spacer are cut. Bar set envelope 42
Defines a temporary assembly unit of the blade and spacer before final metal bonding. The bar set envelope also allows the use of the same bar and spacer throughout the filler.

The blades 46 and spacers 48 are shown in FIGS. 5 a-h and include three blade types. Long, uncut blades 46a, end notch blades 46b, and central notch blades 46c.

The inner end of each blade may be inclined 50 as shown in FIG. This can prevent the fiber material from entangled with the end of the blade located at the inner peripheral edge of the positive filling area. Such entanglement can result in clogging or disruption of the uniform flow of fiber material to the active refinement zone. Accordingly, a slope is formed at the end of the blade 46a to define the edge of the cut 49 of the blade 46b, 46c. Because
This is because, after the bar set is bisected, each inclined cut edge becomes the inner end of the blade as shown in FIGS.

Once the bar set envelope 42 is defined and the desired blades and blades are selected, the correct number of blades and spacers are assembled to form a parallelogram of a particular width, length and bar set angle θ. Is done. The bar set is dimensioned to be cut along line CC to form two identical bar populations.

In the example shown in FIG. 8, the blades 46 and the spacers 48 are assembled alternately in a parallelogram. The blade with beveled end 50 is located outside cutting line CC. Blades that cross the cutting line are provided with cuts 49 that occur when the cutting line passes. In FIG. 8, the blades 46b and 46c pass through the cuts.

After the blade and the spacer are assembled and connected, the bar set is cut along the cutting line CC.
Along with the bar group 24. After cutting, as shown in FIG. 9, one bar population is rotated 180 degrees and assembled into a refining segment. This segment has a bolt hole 52 (FIGS. 2, 3) for attachment to the refining disc.

The method of the present invention proceeds as follows. The layout of the refining filler (FIG. 4) is first defined, in which the outer and inner perimeters 28, 22 define the active refining zone 26.
The pumping angle α and the group angle β are selected and positioned in the layout. A relatively small group angle results in a short outer string 38, which is preferable. Pumping angle inclination 24
An inner circle 32 is formed in contact with a so that all the inclined lines 24a and 24b are in contact with the inner circle 32. In the example of FIG. 4, the group angle β is selected to be 71/2 degrees. As the pumping angle, 10 degrees is selected, and the inner circle 32 is drawn.

Next, the number of segments (eight in the example of FIG. 4) is determined, and the segments are defined by inclined lines 30 that are separated at equal intervals. The number of groups per segment (six in the example) is determined by the slope line 24.

In the layout, the collective envelope is formed by adjacent inclined lines 24 a-b, a chord 38 between the intersections of the inclined lines and the outer edge 28, and an extension 40 parallel to the strings and passing through the intersection of the inner circle 22 and the inclined lines 24 a. 36 are defined.

The bar set envelope 42 (FIGS. 6 and 7) is a pair of collective envelopes 24I-
r, one cluster envelope 24r is arranged as shown in FIG. 3 and the other cluster envelope 24I is rotated 180 degrees to define a parallelogram with one cluster envelope. That is, the left edge 2 of the collective envelope 24I-r
4b defines a cutting line CC along which the burset is cut to form a collective envelope. The burset envelope then receives blades and spacers of length and width that fit within the envelope.

FIG. 8 shows the assembly of the blade and the spacer. It has an edge bevel blade, the pre-cut blade is defined by the beveled edge, the cut being located at the cutting line. After assembly, the blade and the spacer are secured to one another in a manner appropriate for the material. For example, they are metallically bonded along the surfaces that are in contact with each other and then cut to form a bar mass. Alternatively, the bar and the spacer may be temporarily joined by welding before cutting, and joined after cutting.

FIG. 10 shows the outer edge of the bar set population along line CC. In this configuration, the cutting line polygonally intersects blade 46c through the cut and polygonally passes through spacer 48. The blade 46a is not cut and ends at the inclined end 50.

In the present invention, various changes can be made to the above description as long as a person skilled in the art performs. For example, the present invention can be applied to a conical refining machine.

[Brief description of the drawings]

FIG. 1 is a plan view of a refined packing disk of the present invention.

FIG. 2 is a partial cross-sectional view of a refining filler.

FIG. 3 is a plan view of a finely packed filler segment.

FIG. 4 is an explanatory view of a method of defining a blade and a spacer group.

5a to 5h are enlarged views of a blade and a spacer.

FIG. 6 is a contour diagram of an adjacent bar set group.

FIG. 7 illustrates the arrangement of the bar set population of FIG. 6 to form a bar set envelope or parallelogram.

FIG. 8 is a diagram showing a blade and a spacer assembled in a bar set envelope.

FIG. 9 shows the bar set of FIG. 8 cut along line CC and then located near the bar set for refined segment assembly.

FIG. 10 is a side view of the bar set population along section line CC.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Filler 14 Blade 16 Spacer 17 Work surface 24 Bar group 26 Active refining area 42 Parallelogram

Claims (10)

[Claims] In order to manufacture a refining filler having a blade and a spacer, a defining edge of an active refining zone of a refining machine is determined, a pumping angle of the refining filler is selected, and the filler is removed. Divide into the same segments, divide the segments into bar set populations with edges each defining a pumping angle, combine the contours of the two populations to form a bar set envelope, and insert the blades into the bar set envelope. Incorporating a spacer, cutting the bar set into two identical bar set populations, collecting the populations to form refined segments, collecting the segments to form refined fillers, and each segment Has a spaced edge extending between the defined edges, one segment edge being located along the pumping angle. 2. In order to manufacture a refining filler having a blade and a spacer, the inner and outer peripheral edges of the active refining area are determined, a pumping angle deviation from the radius of the refining filler is selected, and the filler is made the same. Divide the segments, divide the segments into bar set populations with edges each defining a pumping angle, combine the contours of the two populations to form a bar set envelope, and within the bar set envelope with blades Incorporating a spacer, cutting the bar set into two identical bar set populations, collecting the populations to form refined segments, collecting the segments to form refined fillers, and each segment Has a spaced edge extending between the inner and outer peripheries, one segment edge being located along a pumping angular offset from the radius. Method of manufacturing filler. 3. The refining filler is a disc of 360 degrees, each segment has a degree value as an integer 360 degrees, the pumping angle can be equally divided into 360 degrees, and the degree value of the segment. 3. The method according to claim 2, wherein the method can be divided into: 4. For a refining filler with a selected pumping angle, wherein the peripheral contour defining a parallelogram and the mutually arranged, substantially filling the area of the parallelogram. A row of blades and spacers, and a cutting line that divides the bar set across the parallelogram into two pieces with edges each corresponding to a pumping angle, the side edges of the parallelogram. A bar set preform wherein the portions are offset by a value equal to the pumping angle, and the blade and the spacer are fixed to each other. 5. The preform according to claim 4, wherein the blade is precut along a cutting line. 6. The blade according to claim 5, wherein the inner end of each blade is inclined.
Preformed product as described in. 7. An active refining zone of a bar and a spacer is provided, and in the production of the refining zone, the inner and outer peripheral edges of the active refining zone of the refining machine are determined, and the pumping angle deviation from the radius of the refining filler is defined. And split the filler into the same segments, split the segments into bar set populations with edges each defining a pumping angle,
The contours of the populations are combined to form a burset envelope, the blades and spacers are incorporated into the burset envelope, the burset is cut into two identical burset populations, and the population is collected into refining segments. Collecting the segments into a refined packing, each segment having spaced apart edges extending between the inner and outer perimeter edges, and one edge positioned along the pumping angle. Refining fillers. 8. An inner and outer periphery having a pumping angle, an edge defined by spaced side edges located along the pumping angle, and an outer edge defined by an outer edge between the spaced side edges. A marginal chord, the inner periphery being defined by a line parallel to the chord and intersecting the inner periphery and one of the side edges, wherein the row of blades and spacers is substantially defined by the edge. A bar set for refining fillers, characterized in that each of the blade sets is located along the pumping angle. 9. The at least one first blade of a predetermined length has a beveled end, and the at least one second blade of the predetermined length has a notch in the blade, whereby Cut into blade segments, the cuts being defined by beveled shoulders, each blade segment having beveled ends, and spacers disposed between adjacent blades to define grooves between blades. A refining filler blade and a spacer. 10. At least one first blade of a predetermined length has a beveled end, and at least one second blade of the same length has an end notch defined by a beveled shoulder. Having at least one third blade of the same length with a central notch, whereby the blade is cut into blade segments, and A center notch defined by a sloping shoulder, each blade segment having a sloping end, and a spacer disposed between adjacent blades to define a groove between the blades. Blade and spacer for crushed filler.