JP4990579B2 - Pulp crusher - Google Patents

Description

  The present invention relates to a pulp crusher for crushing pulp for absorbent articles.

  Conventionally, in the manufacture of absorbent articles used for sanitary goods such as paper diapers, pulverizers for pulverizing pulp have been used. For example, in Patent Document 1, sheet-like pulp is supplied toward the outer peripheral surface of the pulverization cylinder by a pulverization cylinder in which a plurality of disc-shaped pulverization blades having a plurality of teeth on the outer periphery are arranged along the rotation axis. A technique for producing a pulverized pulp by pulverizing slag is disclosed. In the absorbent body manufacturing apparatus of Patent Literature 1, the absorbent core of the absorbent article is formed by wrapping the generated pulverized pulp with tissue paper.

On the other hand, as a pulp pulverizer, an apparatus including a coarse pulverization mechanism for coarsely pulverizing pulp and a fine pulverization mechanism for repulverizing the coarsely pulverized pulp to a predetermined size or less is also used. As one of the coarse crushing mechanisms of such an apparatus, a rotary blade having a plurality of columnar members welded to the outer peripheral surface of a cylindrical shaft member, and a fixed blade having a comb tooth member meshing with the columnar members of the rotary blade, The mechanism which pinches | interposes a pulp and grind | pulverizes is utilized.
JP 2006-63468 A

  By the way, in the coarse pulverization mechanism, the columnar member of the rotary blade is gradually worn by contact with the pulp. In such a rotary blade, the wear of columnar members arranged in the vicinity of the central portion in the axial direction of the rotary blade is usually larger than the wear of columnar members arranged at both end portions in the axial direction. For this reason, when the wear of the columnar member has progressed to some extent in the vicinity of the center in the axial direction, remove the rotary blade from the device, and reverse and reattach the rotary blade, so that the pulp is not worn on the side of each columnar member. Grinding is done. In such a coarse pulverization mechanism, when wear increases on both sides of one of the plurality of columnar members or when the columnar member is damaged, other columnar members are usable. Also, the entire rotary blade is replaced.

  Such reversal and replacement of the rotary blade is usually performed every few months, and a great deal of labor and time is required for the reversal work and replacement work, and the productivity of the absorbent article is lowered. Furthermore, since it is necessary to newly manufacture the entire rotary blade, it is difficult to reduce the manufacturing cost of the absorbent article.

  In addition, since the shaft member and the columnar member are welded with the rotary blade, the material forming the columnar member that is a member in contact with the pulp is restricted, and high hardness, high bending resistance, high wear resistance, etc. The tool steel, super hard material, etc. which have cannot be used as a columnar member. For this reason, it is difficult to extend the life of the rotary blade.

  This invention is made | formed in view of the said subject, and aims at implement | achieving the lifetime improvement of the rotary blade of a pulp crushing apparatus.

The invention according to claim 1 is a pulp crusher for crushing pulp for absorbent articles, a pulp supply mechanism for supplying sheet-like pulp in a predetermined supply direction, parallel to the pulp and in the supply direction A rotating blade and a fixed blade that rotate about a central axis that faces in a direction intersecting with the rotating blade, and rotating the rotating blade downstream of the pulp supply mechanism, thereby rotating the rotating blade between the rotating blade and the fixed blade. And a pulp crushing mechanism for crushing the pulp, wherein the rotary blade is centered on the central axis from the substantially cylindrical or columnar cylinder part centering on the central axis and the outer peripheral surface of the cylinder part a plurality of pulverizing blade mounting portion of the pillar-shaped projecting radially, and a plurality of pulverizing blade mounting tip portion a plurality of grinding blades detachably mounted respectively, and that of the plurality of grinding blades But by a plurality of bolts attached to the pulverizing blade mounting portion, the plurality of bolts, different orientations of one bolt to the direction of the other one of the bolt.

  The invention according to claim 2 is the pulp crusher according to claim 1, wherein the plurality of crushing blade mounting portions are welded to the cylinder portion.

  A third aspect of the present invention is the pulp pulverizing apparatus according to the first or second aspect, wherein the plurality of pulverizing blades are made of tool steel or a super hard material.

A fourth aspect of the present invention is the pulp crusher according to any one of the first to third aspects, wherein a hardened layer is formed on the surface of the fixed blade by thermal spraying.

The invention according to claim 5 is the pulp pulverizing apparatus according to any one of claims 1 to 4 , wherein the pulverized pulp pulverized by the pulp pulverizing mechanism is further finely pulverized downstream of the pulp pulverizing mechanism. And another pulp crushing mechanism.
Invention of Claim 6 is a pulp crusher in any one of Claim 1 thru | or 5, Comprising: Each crushing blade has a convex part formed in the side surface contact | abutted to the said crushing blade attaching part. When each of the crushing blades is attached to the crushing blade mounting portion, the convex portion is fitted into a groove provided in the crushing blade mounting portion.

In the present invention, the life of the rotary blade can be extended. Further, the pulverizing blade can be firmly fixed to the pulverizing blade mounting portion. In the invention of claim 2, the life of the rotary blade can be further extended. In the invention of claim 3, the life of the grinding blade can be extended. In the invention of claim 4, the life of the fixed blade can be extended.

  FIG. 1 is a diagram showing a configuration of an absorbent body manufacturing apparatus 1 according to the first embodiment of the present invention. The absorbent body manufacturing apparatus 1 is an apparatus that manufactures an absorbent body 90 used for absorbent articles such as paper diapers and sanitary napkins, and the absorbent body 90 is a thin plate for absorbent articles that has been cut into a certain size. It is manufactured using the pulverized pulp obtained by pulverizing the pulp 9.

  The absorbent body manufacturing apparatus 1 includes a pulp supply mechanism 2 and a pulp supply mechanism 2 that supply the pulp 9 along a predetermined supply path in a supply direction perpendicular to the width direction of the pulp 9 (that is, the left direction in FIG. 1). The first pulp crushing mechanism 3 that crushes the pulp 9 supplied by the pulp supply mechanism 2 on the downstream side, and the pulverized pulp crushed by the first pulp crushing mechanism 3 on the downstream side of the first pulp crushing mechanism 3 is further finely crushed. The second pulp crushing mechanism 4, the pulverized pulp supply mechanism 5 for temporarily storing the pulverized pulp generated by the second pulp crushing mechanism 4 and supplying a certain amount of pulverized pulp to the downstream side, and the pulverized pulp supply mechanism 5 The absorbent body forming mechanism 6 is provided that forms the absorbent body 90 by molding the pulverized pulp supplied from the factory.

  In the absorbent body manufacturing apparatus 1, the pulp supply mechanism 2, the first pulp pulverization mechanism 3, and the second pulp pulverization mechanism 4 serve as a pulp pulverization apparatus that finely pulverizes the pulp 9 for the absorber. Further, the pulp supply mechanism 2 and the first pulp pulverizing mechanism 3 are pulp pulverizing apparatuses that pulverize the pulp 9 roughly.

  The pulp supply mechanism 2 includes a pulp placement unit 21 on which a plurality of stacked pulps 9 are placed, a pulp take-out mechanism 22 that takes out the pulp 9 from the pulp placement unit 21 one by one, and a pulp from the pulp take-out mechanism 22 The conveyor 23 which receives 9 and conveys it to the 1st pulp grinding | pulverization mechanism 3 is provided.

  FIG. 2 is an enlarged front view showing the first pulp crushing mechanism 3. 2, the inside of the housing 30 of the first pulp crushing mechanism 3 is shown for convenience of illustration. As shown in FIG. 2, the first pulp crushing mechanism 3 is parallel to the pulp 9 and the upper roller 31 and the lower roller 32 that guide the pulp 9 to the left in FIG. The first rotary blade 33 that rotates about a central axis 330 that faces a direction perpendicular to the supply direction of the pulp 9 (that is, a direction perpendicular to the paper surface in FIG. 2) is fixed to the lower portion of the housing 30. The lower fixed blade 34 and the upper fixed blade 35 fixed to the upper part of the housing 30 are provided.

  FIG. 3 is a plan view of the first rotary blade 33. As shown in FIGS. 2 and 3, the first rotary blade 33 has a substantially cylindrical cylinder part 331 centered on the central axis 330, and an angle protruding radially from the outer peripheral surface of the cylinder part 331 around the central axis 330. A plurality of holders 332 that are columnar crushing blade attachment portions, and a plurality of substantially triangular columnar crushing blades 333 that are detachably attached to the tip portions of the plurality of holders 332, respectively.

  FIG. A and FIG. B is a cross-sectional view of the first rotary blade 33 cut along a plane perpendicular to the central axis 330 at positions AA and BB in FIG. 3. FIG. A and FIG. As shown in B, the first rotary blade 33 includes two types of holders 332 having different lengths in the radial direction around the central axis 330. In the following description, FIG. The shorter holder 332 shown in A is referred to as a “first holder 332a”, and FIG. The longer holder 332 shown in B is referred to as a “second holder 332b”. The first holder 332a and the second holder 332b are also collectively referred to as “holder 332”.

  On the outer peripheral surface of the first rotary blade 33, FIG. As shown in A, two first holders 332a are provided on one circumference around the central axis 330, and the two first holders 332a pass through the central axis 330 and the central axis. It is arranged on a straight line perpendicular to 330. In other words, one first holder 332a is arranged on the opposite side of the other first holder 332a across the central axis 330. In addition, FIG. As shown in B, two second holders 332 b are provided on one circumference centered on the central axis 330 with the central axis 330 interposed therebetween.

  FIG. A and FIG. As shown in B, each of the plurality of first holders 332a and the plurality of second holders 332b (that is, the plurality of holders 332) has an end on the opposite side to the side on which the crushing blade 333 is attached inside the cylinder portion 331. That is, it is fixed to the cylinder portion 331 by being welded to the cylinder portion 331 on the outer peripheral surface of the cylinder portion 331 in a state of being inserted in the state of being inserted closer to the central axis 330 side than the outer peripheral surface of the cylinder portion 331.

  As shown in FIG. 3, in the first rotary blade 33, two first holders 332 a (see FIG. 4.A) and two second holders 332 b (see FIG. 4.B) are along the central axis 330. Are alternately arranged. In the present embodiment, 35 sets of two holders 332 are arranged on the outer peripheral surface of the cylinder portion 331. That is, a total of 70 holders 332 are provided on the outer peripheral surface of the cylinder portion 331.

  5 and 6 are an enlarged front view and a right side view of the tip portion of the first holder 332a and the crushing blade 333, respectively. The crushing blade 333 is made of tool steel or super hard material (for example, vanadium carbide, diamond paste, or hard ceramic mainly composed of chromium oxide). As shown in FIG. 5 and FIG. It is attached to the tip of the first holder 332a by three bolts 334 in the form. One of the three bolts 334 is oriented in the axial direction of the first holder 332a (that is, the direction facing the central axis 330 of the first rotary blade 33, the left-right direction in FIG. 5), and the other The two are oriented in a direction substantially perpendicular to the axial direction of the first holder 332a.

  A support portion 3321 is provided at the tip of the first holder 332a so as to abut one side surface of the crushing blade 333 and support the crushing blade 333. A groove 3322 extending in the axial direction of one holder 332a is formed. When the crushing blade 333 is attached to the first holder 332 a, the convex portion 3331 formed on the side surface that contacts the support portion 3321 of the crushing blade 333 is fitted into the groove 3322 of the support portion 3321.

  FIG. Similarly, in the second holder 332b shown in B, the crushing blade 333 is attached to the tip of the second holder 332b by three bolts 334, and one of the three bolts 334 is oriented in the other two directions. The direction of the book is different. Further, the convex portion 3331 (see FIG. 6) of the grinding blade 333 is fitted into the groove 3322 (see FIG. 6) of the support portion 3321 provided at the tip of the second holder 332b.

  FIG. 7 is a plan view showing the lower fixed blade 34. 2 and 7, the lower fixed blade 34 is provided at a position corresponding to the first holder 332a of the first rotary blade 33 with respect to the direction of the central axis 330 (that is, the vertical direction in FIG. 7). The fixed blade part 341 and the 2nd fixed blade part 342 provided in the position corresponding to the 2nd holder 332b are provided. As shown in FIG. 2, the lower fixed blade 34 is between the first fixed blade portion 341 and the crushing blade 333 attached to the first holder 332 a of the first rotary blade 33, and between the second fixed blade portion 342 and It is fixed in the housing 30 with a slight gap between it and the grinding blade 333 attached to the second holder 332b.

  FIG. 8 is a bottom view showing the upper fixed blade 35. As shown in FIGS. 2 and 8, the upper fixed blade 35 includes a third fixed blade portion 351 provided at a position corresponding to the first holder 332a of the first rotary blade 33 with respect to the direction of the central axis 330, and a second holder. A fourth fixed blade portion 352 is provided at a position corresponding to 332b. As shown in FIG. 2, the upper fixed blade 35 includes a third fixed blade portion 351 and a crushing blade 333 attached to the first holder 332 a of the first rotary blade 33, and a fourth fixed blade portion 352. It is fixed in the housing 30 with a slight gap between it and the grinding blade 333 attached to the second holder 332b.

  The lower fixed blade 34 and the upper fixed blade 35 are formed of gray cast iron or the like, and a hardened layer of a super hard material or the like is formed on the surface thereof by a thermal spraying process.

  In the first pulp crushing mechanism 3, the first rotary blade 33 rotates clockwise in FIG. 2, so that it is supplied from the pulp supply mechanism 2 (see FIG. 1) and is first rotated by the upper roller 31 and the lower roller 32. The pulp 9 entering toward the outer peripheral surface of the blade 33 is sandwiched between the plurality of pulverizing blades 333 and the lower fixed blade 34 of the first rotary blade 33 and pulverized. Further, a part of the pulverized pulp moves upward in the housing 30 by the rotation of the first rotary blade 33 or the like, and between the plurality of pulverization blades 333 of the first rotary blade 33 and the upper fixed blade 35. It is sandwiched and further crushed.

  In the first pulp crushing mechanism 3, the pulp 9 can be crushed efficiently by providing the first rotary blade 33 with two types of holders 332 (ie, the first holder 332 a and the second holder 332 b). Further, the concave portions 343 and 353 are provided in the lower fixed blade 34 and the upper fixed blade 35, and the pulp can be repeatedly pulverized by rebounding the pulverized pulp toward the pulverizing blade 333 in the concave portions 343 and 353. . The pulverized pulp generated by the first pulp pulverizing mechanism 3 is conveyed to the second pulp pulverizing mechanism 4 by the first fan 36 shown in FIG.

  FIG. 9 is an enlarged front view showing the second pulp crushing mechanism 4. In FIG. 9, for the convenience of illustration, the inside of the housing 40 of the second pulp crushing mechanism 4 is shown. As shown in FIG. 9, the second pulp crushing mechanism 4 includes a second rotary blade 41 that rotates about a central axis 410, a fixed blade 42 fixed to the lower part of the housing 40, a screen 43 on a thin plate, and these The housing 40 which accommodates the structure of this inside is provided.

  The second rotary blade 41 includes a plurality of crushing blades 411 arranged along the central axis 410, and each crushing blade 411 has a substantially disk shape perpendicular to the central axis 410 with the central axis 410 as the center. . In FIG. 9, only the frontmost grinding blade 411 is shown. Each crushing blade 411 includes a plurality of teeth 412 arranged at a constant pitch on the outer periphery. The fixed blade 42 is formed on the inner surface of the housing 40, and a hardened layer of a super hard material or the like is formed on the surface by a thermal spraying process.

  In the second pulp crushing mechanism 4, the pulverized pulp generated by the first pulp crushing mechanism 3 (see FIG. 2) is supplied from an upper opening 401 in FIG. 9 of the housing 40. And the 2nd rotary blade 41 rotates clockwise in FIG. 9 centering | focusing on the central axis 410, and the pulverized pulp supplied from the 1st pulp crushing mechanism 3 is the 2nd rotary blade 41, the fixed blade 42, and And is pulverized more finely. The pulverized pulp pulverized by the second rotary blade 41 and the fixed blade 42 is conveyed downstream via a screen 43 provided on the left side of the second rotary blade 41 in FIG.

  FIG. 10 is a right side view of the screen 43 as viewed from the second rotary blade 41 side. The screen 43 is formed of, for example, a steel material, and a plurality of circular openings 431 having a predetermined size are formed as shown in FIG. In FIG. 10, only a part of the plurality of circular openings 431 is illustrated, but actually, the circular openings 431 are formed over the entire surface of the screen 43. On the surface of the screen 43, similarly to the fixed blade 42 (see FIG. 9), a hardened layer of a super hard material or the like is formed by thermal spraying.

  In the second pulp crushing mechanism 4, the pulverized pulp is repeatedly sandwiched between the second rotary blade 41 and the fixed blade 42 until it reaches a size that can pass through the circular opening 431 of the screen 43 and is finely crushed. The pulverized pulp that has passed through the screen 43 is conveyed to the pulverized pulp supply mechanism 5 by the second fan 44 shown in FIG.

  In the pulverized pulp supply mechanism 5, the pulverized pulp generated by the second pulp pulverizing mechanism 4 is stored in the storage unit 51, and the pulverized pulp carried out from the lower portion of the storage unit 51 is transferred to the measuring unit 53 by the third fan 52. Be transported. Then, a predetermined amount of pulverized pulp measured by the measuring unit 53 is supplied to the absorbent body forming mechanism 6.

  In the absorbent body forming mechanism 6, the pulverized pulp supplied from the pulverized pulp supply mechanism 5 is mixed with a water-absorbing polymer (for example, SAP (Super Absorbent Polymer)) supplied from the polymer supply unit 621 to form a cylindrical adsorption drum. 62 is sprayed. The suction drum 62 rotates clockwise in FIG. 1 and is pulverized pulp and a water-absorbing polymer on the outer peripheral surface of the suction drum 62 provided with fine suction holes by a suction mechanism (not shown) connected to the inside. Is adsorbed to a predetermined height. The mixing of the water-absorbing polymer may be omitted depending on the absorption power required for the absorber 90.

  The pulverized pulp and water-absorbing polymer adsorbed on the outer peripheral surface of the adsorbing drum 62 move to the lower side of the adsorbing drum 62 as the adsorbing drum 62 rotates, and are fed out from the roll 63 and conveyed by the conveyor 601. It is transferred to the tissue paper 92. An adhesive (for example, hot melt adhesive) is applied in advance to the upper surface of the tissue paper 92 by an adhesive supply unit 631, and the pulverized pulp and the water-absorbing polymer are adhered onto the tissue paper 92 to form the pulp layer 900. Form.

  In the absorbent body forming mechanism 6, an adhesive is applied to one side surface of the tissue paper 93 fed out from another roll 64 while the pulp layer 900 is conveyed to the downstream side (that is, the left side in FIG. 1) by the conveyor 601. An adhesive is applied by the supply unit 641. The tissue paper 93 is bonded onto the pulp layer 900 and the tissue paper 92 with the adhesive application surface facing the pulp layer 900. The pulp layer 900 wrapped in the tissue papers 92 and 93 from above and below is cut into pieces (hereinafter referred to as “absorbing core”) 901 having a predetermined length at the cutting portion 671 (because it becomes the core portion of the absorber 90). The plurality of absorbent cores 901 are conveyed downstream by the conveyor 602 at a predetermined interval.

  Subsequently, the top sheet 94 and the back sheet 95, which are fed out from the rolls 65 and 66 and coated with the adhesive from the adhesive supply units 651 and 661 on one side, are formed on the tissue papers 93 and 92 sandwiching the absorbent core 901. Glued from above. Then, in the cutting part 672, the top sheet 94 and the back sheet 95 are cut in the gap between the adjacent absorption cores 901, whereby the absorbent body 90 is formed. The manufactured absorber 90 is carried out from the absorber manufacturing apparatus 1 by the conveyor 603.

  As described above, in the first pulp crushing mechanism 3 of the absorbent body manufacturing apparatus 1, as shown in FIG. 2, at the tip end portions of the plurality of holders 332 welded to the cylinder portion 331 of the first rotary blade 33, A plurality of grinding blades 333 are detachably attached. For this reason, when some of the plurality of grinding blades 333 are worn due to contact with pulp, only the worn grinding blade 333 can be easily replaced without replacing the entire first rotary blade 33. As a result, the life of the first rotary blade 33 can be extended, and the productivity of the first pulp crushing mechanism 3 and the absorber manufacturing apparatus 1 can be improved.

  Assuming that the first rotary blade has a structure in which a columnar member integrally provided with a grinding blade is welded to the cylinder portion, the grinding blade needs to be formed of a material that can be welded to the cylinder portion. Therefore, the pulverizing blade cannot be formed of tool steel or super hard material having high hardness, high bending strength, high wear resistance, and the like.

  On the other hand, in the 1st pulp grinding | pulverization mechanism 3, since the grinding blade 333 can be attached or detached with respect to the holder 332, the freedom degree of selection of the material which forms the grinding blade 333 can be improved. By forming the grinding blade 333 from tool steel or a super hard material, wear of the grinding blade 333 due to contact with the pulp can be suppressed, and the life of the grinding blade 333 can be increased. Moreover, since the cutting edge of the crushing blade 333 can be sharpened by forming the crushing blade 333 with tool steel or the like, the load applied to the first rotary blade 33 during crushing of the pulp 9 is reduced, and the absorbent body manufacturing apparatus 1 power consumption can also be reduced. Furthermore, the grinding blade 333 can be reduced in weight.

  As described above, since the grinding blade 333 is attached to the holder 332 by the plurality of bolts 334 having different directions, the grinding blade 333 can be firmly fixed to the holder 332. As a result, it is possible to reliably prevent the grinding blade 333 from being displaced from the holder 332 by the force applied when contacting the pulp 9. In the first rotary blade 33, since the convex portion 3331 of the pulverizing blade 333 is fitted in the groove 3322 formed in the support portion 3321 of the holder 332, the pulverizing blade 333 is more likely to be displaced with respect to the holder 332. It can be surely prevented.

  In the first pulp crushing mechanism 3, the holder 332 is fixed to the cylinder portion 331 by welding, whereby the holder 332 and the crushing blade 333 fixed to the holder 332 can be firmly fixed to the cylinder portion 331. Further, it is possible to reliably prevent the holder 332 from dropping from the cylinder portion 331. As a result, the lifetime of the first rotary blade 33 can be further increased.

  Further, in the first pulp crushing mechanism 3, the hardened layer is formed on the surfaces of the lower fixed blade 34 and the upper fixed blade 35, thereby suppressing wear due to contact of the lower fixed blade 34 and the upper fixed blade 35 with the pulp. Further, the life of the lower fixed blade 34 and the upper fixed blade 35 can be increased.

Next, an absorber manufacturing apparatus according to a technique related to the present invention will be described. FIG. 11 is a front view showing the first pulp crushing mechanism 3a of the absorbent body manufacturing apparatus according to the related art . FIG. 11 also shows the inside of the housing 30 of the first pulp crushing mechanism 3a as in FIG. As shown in FIG. 11, in the 1st rotary blade 33a of the 1st pulp crushing mechanism 3a, it replaces with the some holder 332 and the some crushing blade 333 of the 1st rotary blade 33 shown in FIG. Is provided. Other configurations are the same as those in FIG. 2, and the same reference numerals are given in the following description. Moreover, the structure of the absorber manufacturing apparatus which concerns on related technology is the same as that of FIG. 1 except the point which the 1st pulp crushing mechanism 3a shown in FIG.

  The plurality of pulverizing members 335 project radially from the outer peripheral surface of the substantially cylindrical cylinder portion 331 around the central axis 330 and are detachably attached to the outer peripheral surface by bolts 336. Each pulverizing member 335 is an integrally formed columnar member, and a tip portion 3351 on the side far from the central axis 330 is a pulverizing blade for pulverizing the pulp 9.

  Similar to the first holder 332a and the second holder 332b (see FIGS. 4.A and 4.B) of the first rotary blade 33 according to the first embodiment, the first rotary blade 33a has two types of long and short. A crushing member 335 is provided, and two short crushing members 335 and two long crushing members 335 are alternately arranged on the outer peripheral surface of the cylinder portion 331 along the direction of the central axis 330. In the 1st rotary blade 33a, each crushing member 335 is formed with tool steel or super hard material.

  In the first pulp crushing mechanism 3a, the first rotary blade 33a rotates around the central axis 330 in the clockwise direction in FIG. 11 to be supplied from the pulp supply mechanism 2 (see FIG. 1), and the upper roller 31 and the lower roller The pulp 9 entering toward the outer peripheral surface of the first rotary blade 33a by the roller 32 is sandwiched between the tip portions 3351 and the lower fixed blades 34 of the plurality of pulverizing members 335 of the first rotary blade 33a and pulverized. . Part of the pulverized pulp is moved upward in the housing 30 by the rotation of the first rotary blade 33a, etc., and the leading ends 3351 and the upper fixed blades 35 of the plurality of pulverizing members 335 of the first rotary blade 33a. And is further pulverized.

In the absorber manufacturing apparatus according to the related art , the pulp supply mechanism 2, the first pulp crushing mechanism 3a, and the second pulp crushing mechanism 4 (see FIG. 1) are a pulp crushing apparatus that finely crushes the pulp 9 for the absorber. Play a role. Further, the pulp supply mechanism 2 and the first pulp pulverizing mechanism 3a are pulp pulverizing apparatuses that pulverize the pulp 9 roughly.

  In the first pulp crushing mechanism 3a, a plurality of crushing members 335 whose tip part 3351 is a crushing blade are detachably attached to the outer peripheral surface of the cylinder part 331. For this reason, when some of the plurality of pulverizing members 335 are worn by contact with pulp, only the worn pulverizing member 335 can be easily replaced without replacing the entire first rotary blade 33a. As a result, as in the first embodiment, the life of the first rotary blade 33a can be increased, and the productivity of the first pulp crushing mechanism 3a and the absorber manufacturing apparatus can be improved. In addition, since the pulverizing member 335 is formed of tool steel or a super hard material, the life of the pulverizing member 335 can be increased.

  As mentioned above, although embodiment of this invention has been described, this invention is not limited to the said embodiment, A various change is possible.

  For example, in the first pulp crushing mechanism according to the above embodiment, the cylinder portion 331 of the first rotary blade may be a substantially cylindrical member. Further, the hardened layer on the surfaces of the lower fixed blade 34 and the upper fixed blade 35 may be formed by a surface modification process (for example, a coating process) other than the thermal spray process. Similarly, in the fixed blade 42 and the screen 43 of the second pulp crushing mechanism 4, the surface hardened layer may be formed by a surface modification process other than the thermal spraying process.

In the first pulp crushing mechanism 3a according to the related art , the crushing member 335 may be detachably attached to the cylinder portion 331 by various fixing methods other than the bolt 336.

  The pulp pulverized by the first pulp pulverization mechanism according to the above embodiment may be in the form of a sheet. For example, the roll-shaped pulp wound around the drum is fed out by the pulp supply mechanism to the first pulp pulverization mechanism. It may be supplied.

It is a figure which shows the structure of the absorber manufacturing apparatus which concerns on 1st Embodiment. It is a front view of a 1st pulp grinding | pulverization mechanism. It is a top view of the 1st rotary blade. It is sectional drawing of a 1st rotary blade. It is sectional drawing of a 1st rotary blade. It is a front view which expands and shows the front-end | tip part and grinding | pulverization blade of a 1st holder. It is a right view which expands and shows the front-end | tip part and crushing blade of a 1st holder. It is a top view which shows a lower fixed blade. It is a bottom view which shows an upper fixed blade. It is a front view of the 2nd pulp crushing mechanism. It is a right view of a screen. It is a front view of the 1st pulp crushing mechanism concerning related technology .

Explanation of symbols

2 Pulp supply mechanism 3, 3a 1st pulp crushing mechanism 4 2nd pulp crushing mechanism 9 Pulp 33, 33a 1st rotary blade 34 Lower fixed blade 330 Center axis 331 Cylinder part 332 Holder 332a 1st holder 332b 2nd holder 333 Grinding blade 334 Bolt 335 Grinding member 3351 Tip

Claims (6)

A pulp crusher for crushing pulp for absorbent articles,
A pulp supply mechanism for supplying sheet-like pulp in a predetermined supply direction;
The rotary blade has a rotary blade and a fixed blade that rotate about a central axis that is parallel to the pulp and that intersects the supply direction, and the rotary blade is rotated by rotating the rotary blade downstream of the pulp supply mechanism. And a pulp crushing mechanism for crushing the pulp between the fixed blade and the fixed blade,
With
The rotary blade is
A substantially cylindrical or substantially columnar cylinder portion centered on the central axis;
A plurality of columnar crushing blade mounting portions projecting radially from the outer peripheral surface of the cylinder portion around the central axis;
A plurality of crushing blades detachably attached to the tip parts of the plurality of crushing blade mounting parts, and
Equipped with a,
Each of the plurality of crushing blades is attached to the crushing blade mounting portion by a plurality of bolts,
The pulp crusher characterized in that the direction of one bolt among the plurality of bolts is different from the direction of the other one bolt . The pulp crusher according to claim 1,
The pulp crusher characterized in that the plurality of crushing blade mounting portions are welded to the cylinder portion. The pulp crusher according to claim 1 or 2,
The pulp crushing apparatus, wherein the plurality of crushing blades are made of tool steel or a super hard material. The pulp crusher according to any one of claims 1 to 3 ,
A pulp crusher characterized in that a hardened layer is formed on the surface of the fixed blade by thermal spraying. The pulp crusher according to any one of claims 1 to 4 ,
A pulp pulverizing apparatus further comprising another pulp pulverizing mechanism for further finely pulverizing the pulverized pulp pulverized by the pulp pulverizing mechanism downstream of the pulp pulverizing mechanism. The pulp crusher according to any one of claims 1 to 5,
Each crushing blade has a convex portion formed on a side surface that abuts on the crushing blade mounting portion,
The pulp crusher is characterized in that, when each of the crushing blades is attached to the crushing blade attaching portion, the convex portion is fitted into a groove provided in the crushing blade attaching portion.

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