JP5457506B2 - Fiber stacking equipment - Google Patents

Description

  The present invention relates to a fiber stacking apparatus that is used to obtain a molded body (absorbent body) having a predetermined shape by sucking and stacking a molded body material such as a fiber material or a water-absorbing polymer.

  As an apparatus for manufacturing absorbent bodies used for absorbent articles such as disposable diapers, sanitary napkins, incontinence pads, etc., a rotating drum having a concave portion for accumulation on the outer peripheral surface, and pulp on the outer peripheral surface while rotating the rotating drum The molded body material is supplied in a scattered state, and the molded body material is stacked in the accumulation recess by suction from the bottom surface of the accumulation recess composed of a porous member having a plurality of suction holes formed. After that, there is provided a fiber stacking apparatus that separates the piled material in the collecting concave portion from the collecting concave portion by suction from the sucking means disposed opposite to the collecting concave portion and transfers it onto the suction means. Are known.

  With respect to the fiber stacking apparatus having the above-described configuration, for example, Patent Document 1 discloses a bottom portion of a stacking recess formed of a metal mesh or the like in order to adjust the density and amount of the stacked fabric in the stacking recess. It is disclosed that the opening ratio (opening ratio) is varied. In Patent Document 2, in the fiber stacking apparatus having the above-described configuration, the suction chamber disposed inside the rotary drum is divided into a plurality of suction chambers in a longitudinal section along the flow direction, and each suction It is described that a suction means is provided for each chamber, and each suction force is made different. Further, in Patent Document 3, an opening of the metal mesh is provided on the inner surface side (the non-stacking surface side of the molded body material) of the web layer made of a metal mesh (porous member) that forms the bottom surface of the concave portion for accumulation. A space member having a large number of openings (large openings) having a larger opening diameter than the gas member, and a gas flow rate control layer having a large number of openings (small openings) having a smaller opening diameter than the openings of the space members; However, rotating drums that are stacked in this order are described. According to Patent Document 3, air flows in a predetermined pattern through the web layer by the action of the gas flow rate control layer, and therefore, fibers having a desired basis weight can be stacked on the web layer.

JP 2000-234255 A JP 2002-272882 A Japanese Patent Laid-Open No. 62-206071

  In the fiber stacking apparatus having the above-described configuration, as described in Patent Document 1, the hole area ratio (the ratio of the total area of the suction holes to the unit area) at the bottom of the accumulation recess is appropriately set. Therefore, it is possible to control the amount of the molded body material (basis weight of the molded body) stacked on the bottom, and in general, when the porosity is reduced, the suction of the molded body material is reduced. The force decreases and the amount of piles decreases. Accordingly, by partially varying the opening ratio of the bottom of the stacking recess, even when suction is performed with a constant suction force from the inside of the apparatus using a single suction means, the suction force is relatively applied to the bottom portion. A strong strong suction portion and a weak suction portion having a relatively weak suction force are generated, and therefore, a high basis weight portion in which the molded body material is stacked at a relatively high basis weight on the strong suction portion, It is possible to produce a molded body having a low basis weight portion in which the molded body material is laminated at a relatively low basis weight on the weak suction portion, and the basis weight of the molded body with a relatively simple apparatus configuration. The amount can be adjusted.

  However, as described in Patent Document 1, when the hole area ratio of the bottom portion of the concave portion for accumulation is intentionally reduced, particularly in the weak suction portion of the bottom portion thus formed, the suction hole and its vicinity There is a case where the difference in the suction force of the molded body material becomes remarkable between the other portions and the other portions, and there is a clear difference in the amount of fibers accumulated between the two portions. As a result, there is a risk that unevenness due to the difference in the amount of accumulated fibers may occur in the low basis weight portion of the molded body that is accumulated on the weak suction portion and should have a uniform amount of accumulated fibers. There is. The occurrence of uneven fiber accumulation is not desirable when the molded body is an absorbent body used for an absorbent article, for example, which may lead to a decrease in absorption performance or a feeling of wearing of the absorbent article. Patent Document 1 does not describe such uneven stacking caused by an intentional decrease in the opening ratio of the bottom of the accumulation recess, and does not cause uneven stacking. There has not yet been provided a fiber stacking device that can adjust the amount of fiber piles.

  Moreover, the technique described in Patent Document 3 has the following problems 1 to 3, and there is room for improvement. Problem 1: One small opening of the gas flow rate control layer is arranged so as to straddle a plurality of large openings of the space member, and there is a possibility that uneven fiber stacking may occur. Problem 2: The number of small openings of the gas flow rate control layer corresponding to each of the plurality of large openings of the space member is different, and there is a possibility that uneven fiber stacking may occur. Problem 3: The metal mesh (porous member) is formed with pockets (recesses) for partially forming the molded body material into a high basis weight, and the gas flow control layer surrounds the pocket region. Since the end portion is disposed so as to straddle the plurality of openings of the space member, there is a possibility that a high basis weight portion (so-called middle-high portion) as designed cannot be formed. is there.

  Therefore, the present invention relates to a fiber stacking apparatus that can adjust the fiber stacking amount of a molded body material without causing uneven fiber stacking.

  The present invention has a concave portion for accumulation on the outer surface on which the molded body material is piled up, and is conveyed while riding the air flow generated by suction from the inner side while conveying the concave portion for accumulation in one direction. An apparatus for stacking body material on a bottom surface of the accumulation recess formed of a porous member having a plurality of suction holes, wherein the air flow is adjusted on the inner surface side of the porous member. A body is disposed so as to overlap at least a part of the inner surface of the porous member, and the adjustment body has a plurality of openings that penetrate the adjustment body in the thickness direction, and the openings are formed of the porous member. The fiber stacking apparatus has a smaller opening area than an opening end portion relatively far from the opening member.

  The present invention also relates to a method for manufacturing an absorbent body using the fiber stacking apparatus, wherein a molded body material, which is an absorbent material supplied on an air stream, is sucked into an accumulation recess of the fiber stacking apparatus. The manufacturing method of the absorber which comprises the fiber-filing process made to pile up is provided.

  According to the present invention, it is possible to adjust the amount of spread of the molded body material without causing unevenness in the pile, and it is possible to efficiently produce a high-quality molded body in which the amount of spread of the molded body material is partially different. Can be manufactured well.

FIG. 1 is a schematic perspective view showing one embodiment (first embodiment) of the fiber stacking apparatus of the present invention. FIG. 2 is a diagram in which the outer peripheral portion (recess for accumulation) of the rotary drum in the fiber stacking device shown in FIG. 1 is developed in a planar shape. FIG. 3 is an exploded perspective view of the outer peripheral portion of the rotating drum shown in FIG. FIG. 4 is a perspective view schematically showing a cross section taken along line II of FIG. FIG. 5 is a cross-sectional view schematically showing a part of a cross section taken along line II of FIG. 6 is a perspective view schematically showing a cross section taken along line II-II in FIG. FIG. 7 is a perspective view showing the piled product released from the collecting concave portion of the rotary drum in the pile device shown in FIG. 1. FIG. 8 is a perspective view of the outer peripheral portion (recess for accumulation) of the rotating drum in another embodiment (second embodiment) of the fiber stacking apparatus of the present invention. FIG. 9 is an exploded perspective view of the outer periphery of the rotating drum shown in FIG. FIG. 10 is a diagram schematically showing a cross section along a drum width direction (a direction parallel to the rotation axis of the rotary drum) of a part of the bottom of the accumulation concave portion in the outer peripheral portion of the rotary drum shown in FIG. 10 (a) is a perspective view of a region where the adjustment body is not disposed (high basis weight product fiber region), and FIG. 10 (b) is a region where the adjustment body is disposed (low basis weight product fiber region). It is a perspective view. FIG. 11 is a perspective view showing the piled article released from the accumulation recess of the rotating drum shown in FIG. FIG. 12A to FIG. 12E are plan views each schematically showing a correspondence relationship between the first layer and the second layer in the adjustment body according to the present invention. FIG. 13 is a view corresponding to FIG. 4 showing still another embodiment of the fiber stacking apparatus of the present invention. FIG. 14A to FIG. 14D are cross-sectional views schematically showing a cross section along the drum width direction of the opening of the adjusting body according to the present invention. FIG. 15 is a schematic perspective view showing still another embodiment of the fiber stacking apparatus according to the present invention in a partially transparent manner.

  Below, this invention is demonstrated, referring drawings based on the preferable embodiment. FIG. 1 shows an outline of a first embodiment of the fiber stacking apparatus of the present invention. The fiber stacking apparatus 1 according to the first embodiment is disposed at a rotary drum 2 that is rotationally driven in the direction of the arrow R2, a duct 4 that supplies a molding material to the outer peripheral surface 21 of the rotary drum 2, and an obliquely lower side of the rotary drum 2. And a transfer roll 5 that is rotationally driven in the direction of arrow R5, a vacuum conveyor 6 disposed below the transfer roll 5, and a cutting device 7. In the fiber stacking apparatus 1, a vacuum box 11 is further provided between the duct 4 and the transfer roll 5 in the circumferential direction of the rotary drum 2, and a mesh belt 13 is provided between the vacuum box 11 and the rotary drum 2. The windbreak plate 15 is provided close to the outer peripheral surface of the transfer roll 5 so as to pass between the transfer roll 5 and the rotary drum 2. Note that the vacuum box 11 and the windbreak plate 15 are means for stably transferring the piled articles in the accumulation recess 22 without losing the shape, and relatively, like the piled articles 32 shown in FIG. When a piled fiber having a shape that does not easily lose its shape is obtained, it is not particularly necessary to install it, or it is not necessary to use it even if it is installed. On the other hand, for example, a piled article 32A shown in FIG. 11 has a concave portion (groove portion) 38 having a lattice shape in a plan view and a convex portion 39 formed in an eye portion of the lattice, and has a shape that is relatively easily deformed. It is delicate. The vacuum box 11 and the windbreak plate 15 are effective when a piled article having such a shape that is easy to lose its shape is obtained.

  As shown in FIG. 1, the rotating drum 2 has a cylindrical shape and rotates around a horizontal axis by receiving power from a prime mover such as a motor. As shown in FIG. 2, the rotary drum 2 has an accumulation recess 22 on the outer peripheral surface 21 in which the molded body material is stacked. A plurality of the recesses 22 are formed at predetermined intervals in the circumferential direction (2X direction) of the rotary drum 2. In FIG. 2, the 2X direction is the circumferential direction of the rotating drum 2, and the 2Y direction is the width direction of the rotating drum 2 (a direction parallel to the rotation axis of the rotating drum 2).

  As shown in FIG. 3, the rotary drum 2 includes a cylindrical drum body (not shown) made of a metal rigid body, a suction adjustment plate 25 that is fixed to the outer periphery of the drum body, and the suction drum. The space plate 26 fixed to be overlapped on the outer surface 25 a side of the adjustment plate 25, the porous plate 27 (porous member) fixed to be overlapped on the outer surface 26 a side of the space plate 26, and the outer surface of the porous plate 27 27a, and a pattern forming plate 28 fixed to be overlapped on the 27a side. The drum body and these plates 25 to 28 are fixed to each other by a known fixing means such as a bolt or an adhesive. A bottom surface 22 a of the concave portion 22 for accumulation, which is a fiber surface to be stacked with the molded body material, is formed from a porous plate 27.

  In the present specification, the outer surface of each constituent member (suction adjustment plate 25, space plate 26, porous plate 27, pattern forming plate 28, etc.) of the rotary drum 2 is the fiber pile of the molded material in the constituent member. The surface is directed to the supply side of the molded body material when it is formed. In addition, the inner surface of each constituent member is a surface directed to the side opposite to the supply side of the molding material (the inner side of the rotating drum) when the molding material is stacked in the constituent member. . When the molded object manufactured with the fiber accumulation apparatus 1 is an absorber used for absorbent articles, such as a disposable diaper and a sanitary napkin, a molded object material is an absorber raw material.

  The molded body material includes a fiber material. As the molded body material as the absorbent material, various materials conventionally used for absorbent articles of absorbent articles such as sanitary napkins, panty liners, and disposable diapers can be used without particular limitation. For example, pulp fibers such as defibrated pulp, short fibers of cellulosic fibers such as rayon fibers and cotton fibers, and short fibers of synthetic fibers such as polyethylene are used. These fiber materials can be used alone or in combination of two or more. Moreover, you may use a water absorbing polymer with a fiber material as an absorber raw material. Further, as the fibrous raw material, a fibrous water-absorbing polymer can be used alone or together with the fibrous material. Furthermore, a deodorant, an antibacterial agent, etc. can also be used with a fiber material etc. as needed.

  The pattern forming plate 28 has an outer surface 28a that forms the outer peripheral surface 21 of the rotating drum 2 and an inner surface 28b that faces the rotating shaft side of the rotating drum 2, and an accumulation recess is provided between the outer surface 28a and the inner surface 28b. 22 has a space portion having a shape corresponding to the three-dimensional shape in 22. Except for this space portion, the pattern forming plate 28 is non-breathable so as not to allow air to pass therethrough. Here, “non-breathable” includes both “non-breathable that does not allow air to pass through” and “non-breathable that allows a very small amount of air to pass but does not substantially allow air to pass through”. It means sex. As the pattern forming plate 28, for example, a plate formed by machining a metal or resin plate such as stainless steel or aluminum to form an opening (a space corresponding to a three-dimensional shape in the recess 22), or a mold It is possible to use a plate in which the opening is integrally formed using, or a punched or etched plate, or a laminate of these plates.

  The porous plate 27 transmits an air flow (vacuum air) generated by suction from the inside of the device (inward of the rotating drum 2) to the outside of the device (outside of the rotating drum 2) and rides on the air flow. It is a breathable plate that holds the molded body material that is carried without allowing it to permeate and allows only air to permeate. The porous plate 27 is formed with a plurality of (multiple) suction holes (pores) penetrating the plate 27 in the thickness direction with a uniform distribution over the entire plate 27, and the accumulation recess 22 is a rotating drum. While passing through the space maintained at a negative pressure in 2, the suction hole functions as an air flow permeation hole. As the porous plate 27, for example, a metal or resin mesh plate, or a metal or resin plate formed with a plurality of (many) pores by etching or punching can be used.

  As shown in FIGS. 3 and 4, on the inner surface 27 b side of the porous plate 27, the adjusting body 10 that rectifies the air flow is disposed so as to overlap a part of the inner surface 27 b of the plate 27. The adjustment body 10 is configured by sequentially laminating the first layer 8 and the second layer 9 in the order closer to the porous plate 27. In the first embodiment, the adjustment body 10 includes a suction adjustment plate 25 and a space plate 26, and the bottom surface of the recess 22 in the space plate 26 in the plan view of the accumulation recess 22 as shown in FIG. Part of the portion overlapping 22 a is the first layer 8, and the portion of the suction adjustment plate 25 overlapping the first layer 8 is the second layer 9. Here, the “plan view” refers to an object (such as a concave portion for accumulation) viewed from the outside in the normal direction of the outer peripheral surface 21 of the rotating drum 2 (direction perpendicular to the rotating shaft direction of the rotating drum 2). Means the case.

  The first layer 8 has a plurality of first openings 81 penetrating the first layer 8 in the thickness direction, and opening defining portions 82 that partition each first opening 81. The opening defining portion 82 includes a plurality of MD defining members 83 extending in the transport direction R2 (circumferential direction of the rotating drum 2, 2X direction) of the concave portion 22 for accumulation, and a direction (rotating drum 2) orthogonal to the transport direction. And a plurality of CD defining members 84 extending in the width direction and the 2Y direction). Here, regarding the MD defining member, “extending in the conveying direction of the stacking concave portion” means that the MD defining member may extend substantially in the transporting direction. The definition member is not limited to a straight line parallel to the conveyance direction, and includes a case where the MD definition member is curved along the conveyance direction, and the MD definition member is not parallel to the conveyance direction. Includes a case where the angle formed with the transport direction is along a crossing direction of 45 ° or less. Further, regarding the CD defining member, “extending in the direction (orthogonal direction) perpendicular to the conveying direction of the stacking recess” means that the CD defining member extends substantially in the orthogonal direction. 22 in a plan view, the CD defining member is not limited to a linear shape parallel to the orthogonal direction, and includes a case where the CD defining member is a curved shape along the orthogonal direction. This includes the case where the angle formed with the orthogonal direction is not parallel to the orthogonal direction but is along a crossing direction of 45 ° or less.

  In the first embodiment, as shown in FIGS. 2 to 4, the opening defining part 82 includes six MDs in a straight line in plan view parallel to the transport direction (2X direction) of the stacking concave part 22. It is composed of a member 83 and five linear CD definition members 84 in plan view that are parallel to a direction (2Y direction) orthogonal to the conveying direction of the accumulation recess 22, and a total of ten straight lines in plan view. Are formed in a lattice shape in plan view. The first opening portion 81 is located at a portion of the lattice of the lattice-like opening portion defining portion 82 and has a quadrangular shape in plan view. The opening defining part 82 (defining members 83 and 84) has a non-breathable property that does not allow air to pass therethrough. The “non-breathable” here is as described above. As a material for forming the non-breathable opening defining portion 82 (defining members 83 and 84), a metal such as stainless steel, aluminum, iron, or a resin can be used.

  A second opening 91 that penetrates the second layer 9 in the thickness direction is formed in a portion of the second layer 9 that overlaps the plurality of first openings 81 in a plan view of the concave portion 22 for accumulation as shown in FIG. The first openings 81 are formed so as to correspond to the first openings 81, and the openings 81 and 91 having the corresponding relationship overlap each other in the plan view. In the first embodiment, as shown in FIGS. 3 and 4, one second opening 91 of the second layer 9 corresponds to one first opening 81 of the first layer 8. The first opening 81 and the second opening 91 correspond one-to-one.

  As one of the main features of the first embodiment, the second opening 91 is separated from the CD defining member 84 in each of the plurality of first openings 81 in the plan view of the accumulation recess 22 as shown in FIG. The portion that overlaps with the CD defining member 84 in the second layer 9 (hereinafter also referred to as the CD defining member corresponding portion) and its vicinity have a non-breathable property that does not allow air to pass. Can be mentioned. The “non-breathable” here is as described above. Reference numeral 92 in FIG. 3 indicates the CD defining member corresponding portion of the second layer 9 and the vicinity thereof. Similar to the other portions of the suction adjustment plate 25, the CD defining member corresponding portion and its vicinity 92 are formed of a non-breathable material such as a metal such as stainless steel, aluminum or iron, or a resin, and an opening (second portion). It does not have a through-hole penetrating the layer 9 in the thickness direction, and has air permeability.

  Here, “in the vicinity of the CD defining member corresponding portion” refers to the 1 over the entire length of one CD defining member 84 in the 2Y direction (the width direction of the rotating drum 2) in the plan view of the accumulation recess 22. This is an area extending along the CD defining member 84, and has a certain width (length in the 2X direction) W1 (see FIG. 4). Further, the width (the length in the 2X direction) of the CD defining member corresponding portion is the same as the width W2 (see FIG. 4) of the corresponding CD defining member 84.

  In addition, the second layer 9 in the first embodiment has not only the CD defining member 84 but also the MD defining member 83 and a portion overlapping therewith and a non-breathable portion that does not allow air to pass therethrough. That is, in a plan view of the accumulation recess 22 as shown in FIG. 2, the second opening 91 is located at a position spaced apart from the MD defining member 83 inside each of the plurality of first openings 81 and the second layer 9. The portion that overlaps the MD defining member 83 (hereinafter also referred to as the MD defining member corresponding portion) and the vicinity thereof have non-breathability that prevents air from passing therethrough. The “non-breathable” here is as described above. Reference numeral 93 in FIG. 3 indicates the MD defining member corresponding portion of the second layer 9 and its vicinity. The MD defining member corresponding portion and its vicinity 93 are formed of a non-breathable material such as stainless steel, aluminum, iron or the like, or resin, like the other portions of the suction adjusting plate 25, and the opening portion (second portion). It does not have a through-hole penetrating the layer 9 in the thickness direction, and has air permeability.

  Here, “in the vicinity of the MD defining member corresponding part” means that the length of the MD defining member 83 in the 2X direction (the circumferential direction of the rotating drum 2) is 1 in the plan view of the accumulation recess 22. The region extends along the MD defining member 83 and has a certain width (length in the 2Y direction) W3 (see FIG. 4). Further, the width (the length in the 2Y direction) of the MD defining member corresponding portion is the same as the width W4 (see FIG. 4) of the corresponding MD defining member 83.

  As described above, in the first embodiment, the two CD defining members 84 and 84 in which the second opening 91 is opposed to each other inside each of the plurality of first openings 81 in the plan view of the concave portion 22 for accumulation. In addition, the two MD defining members 83 and 83 that are opposed to each other are located at positions apart from each other. Accordingly, the second opening 91 existing inside one first opening 81 in a plan view of the recess 22 has a smaller opening area than the first opening 81. Here, the “opening area” of the openings 81 and 91 is the opening at the opening end closest to the porous plate 27 in the opening (the first opening 81 and the second opening 91). It means an area (in the case where the opening and the porous plate are in contact with each other), the area of the contact area.

  In the first embodiment, since the first opening 81 and the second opening 91 overlap each other in plan view of the accumulation recess 22, the adjustment body 10 (first It can be said that one opening is formed penetrating the layer 8 and the second layer 9) in the thickness direction. As described above, since the second opening 91 existing inside the first opening 81 in the plan view of the recess 22 has a smaller opening area than the first opening 81, both openings In consideration of such a magnitude relationship between 81 and 91, the adjustment body 10 in the first embodiment includes a plurality of openings that penetrate the adjustment body 10 in the thickness direction (first openings 81 that overlap each other in plan view of the recess 22. And the second opening 91), and the opening is relative to the opening end relatively far from the porous plate 27 (the opening end of the second opening 91). It can be said that the opening area is smaller than the opening end portion closer to the aperture (the opening end portion of the first opening portion 81).

  In the first embodiment, the second opening 91 is formed at the center of each of the plurality of first openings 81 in the plan view of the concave portion 22 for accumulation.

  In the first embodiment, in the plan view of the concave portion 22 for accumulation, the first opening 81 and the second opening 91 existing therein have a similar shape in plan view. Both openings 81 and 91 have a quadrangular shape in plan view. That is, regarding the shape of the openings 81 and 91 in plan view, the second opening 91 has a similarity ratio of less than 1 with respect to the corresponding first opening 81.

  When the adjustment body 10 (the first layer 8 and the second layer 9) having the above-described configuration is disposed on the inner surface 27b side of the porous plate 27 forming the bottom surface 22a of the accumulation recess 22, the recess 22 described later is provided. Compared to the case where the adjustment body 10 is not arranged as in the adjustment body non-arrangement area (high basis weight pile fiber area) 23, an air flow (vacuum) that sucks the molded body material generated by suction from the inside of the apparatus. The air volume when air flows through the porous plate 27 is suppressed. That is, as shown in FIG. 5, the air flow (indicated by an arrow in FIG. 5) flowing from the outside of the rotating drum 2 to the inside through the porous plate 27 is caused by the adjusting body 10 at the bottom of the recess 22. In the arranged region, the porous plate 27, the first layer 8, and the second layer 9 pass through the constituent members of the rotating drum 2 in this order. However, the air flow is located below the air flow, and the second opening 91 of the second layer 9 that substantially functions as a suction portion for the molded body material is more inflated than the second opening 91. Since the opening area is smaller than the first opening 81 of the first layer 8 located on the windward side, the porous plate 27 inherently has air permeability in the region where the adjusting body 10 is disposed. Since it is obstructed, the air volume of the air flow is suppressed.

  Further, in the fiber stacking process in which the compact material supplied on the air flow is sucked into the accumulation concave portion 22 and stacked, the basis weight of the compact material depends on the amount of air flowing through the porous plate 27. Therefore, by arranging the adjusting body 10 in a region corresponding to a portion on the inner surface 27b side of the porous plate 27 where the basis weight of the molded body material to be stacked is smaller than other portions, a desired portion is obtained. A compact with a reduced basis weight can be produced with simple equipment. For example, when manufacturing an absorbent used for absorbent articles such as disposable diapers or sanitary napkins as a molded product, absorbent raw materials such as pulp and water-absorbing polymers are concentrated in parts where high absorption capacity is required. By using the adjusting body 10 to reduce the basis weight as much as possible, it is possible to obtain an absorbent body excellent in both absorption performance and reduction in discomfort and discomfort.

  In this way, when the air volume of the air flow flowing through the porous plate 27 that forms the bottom surface 22a of the accumulation recess 22 is suppressed by the adjusting body 10, the second surface that substantially functions as a suction portion for the molded body material on the bottom surface 22a. There is a significant difference in the air flow rate (suction force of the molded material) between the portion corresponding to the opening 91 (the portion overlapping the opening 91 in the plan view of the recess 22) and its vicinity, and the other portions. As a result, there is a clear difference in the amount of accumulated fibers between the two parts, and there is a possibility that unevenness in the accumulated fibers due to the difference in the accumulated fiber amount may occur in the arrangement region of the adjusting body 10 where the accumulated fiber amount should be uniform. There is. However, in the first embodiment, the first opening 81 having an opening area larger than that of the second opening 91 is provided on the wind flow of the air flow than the second opening 91, thereby In addition, since a space of a predetermined capacity composed of the first opening 81 is formed between the porous plate 27 and the second opening 91, the air flow that has passed through the porous plate 27 flows into the second opening 91. By passing through this space before passing through, it is rectified. As a result, the variation in the air volume of the air flow in the porous plate 27 is reduced, and the occurrence of uneven stacking is effectively prevented.

  Further, as will be described later, a plurality of spaces (spaces B to D) that are partitioned from each other are formed inside the rotary drum 2, and a part (space B) of the plurality of spaces has a negative pressure. The accumulation concave portion 22 is conveyed in the same direction by the rotation of the rotary drum 2 in the R2 direction, and passes through the space B maintained at a negative pressure. Airflow flows from the outside of the drum to the inside. Temporarily, the 2nd opening part 91 has overlapped with the CD definition member 84 in planar view of the recessed part 22, or the CD definition member corresponding | compatible part of the 2nd layer 9 and its vicinity 92 become a ventilation part which lets air pass. Are adopted, the plurality of first openings 81 are transported in the conveying direction R2 of the recess 22 via the second opening 91 overlapping the CD defining member 84 or the air-permeable portion. The air flows are communicated with each other so as to be able to pass through in the circumferential direction of the rotating drum 2 and the 2X direction. Then, before the first opening portion 81 (rear side first opening portion 81) positioned on the rear side relative to the transport direction R2 passes through the space maintained at the negative pressure, the transport direction R2 The first opening 81 (front first opening 81) positioned relatively on the front side is affected by the air flow flowing through the front first opening 81 when the first opening 81 passes through the space. A turbulent flow is generated in the opening 81, whereby the rectifying effect by the first opening 81 described above is impaired, and there is a possibility that the occurrence of uneven fiber stacking cannot be prevented.

  On the other hand, in the first embodiment, as described above, the second opening 91 is separated from the CD defining member 84 inside each of the plurality of first openings 81 in the plan view of the accumulation recess 22. The portion corresponding to the CD defining member of the second layer 9 and its vicinity 92 are non-breathable portions that do not allow air to pass therethrough, and the plurality of first openings 81 have air in the transport direction R2 of the recesses 22. The flows are not in communication with each other so that they can pass through. Therefore, turbulent flow does not occur in the rear side first opening 81 before passing through the space maintained at the negative pressure of the rotary drum 2, and the rectifying effect by the first opening 81 described above. Is definitely played.

  In particular, in the first embodiment, as described above, the second opening 91 is located not only from the CD defining member 84 but also from the MD defining member 83 extending in the direction orthogonal thereto, and The portion of the second layer 9 that overlaps the opening defining portion 82 and the vicinity thereof (92, 93) are non-breathable portions. Thus, the plurality of first openings 81 are not in communication with each other so that an air flow can pass in both the transport direction R2 of the accumulation recess 22 and the direction orthogonal thereto, and a space formed by each first opening 81. Therefore, the rectifying effect by the first opening 81 described above is more reliably exhibited.

  In the first embodiment, as described above, the second opening 91 is formed in the center of each of the plurality of first openings 81 in the plan view of the accumulation recess 22, and further, the recess 22. In the plan view, the first opening 81 and the second opening 91 existing in the first opening 81 are similar to each other in plan view. These configurations are effective for stable expression of the rectifying effect by the first opening 81 described above.

From the viewpoint of surely expressing the rectifying effect by the first opening 81 described above and more effectively preventing uneven fiber accumulation, it is preferable to set the dimensions of each part of the apparatus within the following ranges.
The width W1 (see FIG. 4) in the vicinity of the CD defining member corresponding portion of the second layer 9 (the portion overlapping the CD defining member 84 in plan view of the concave portion 22 for accumulation) is preferably 1 mm or more, more preferably It is 2 mm or more, and preferably 10 mm or less, more preferably 5 mm or less, more specifically, preferably 10 to 1 mm, and more preferably 5 to 2 mm.
The width W2 (see FIG. 4) of the CD defining member 84 of the first layer 8 is preferably 0.5 mm or more, more preferably 1 mm or more, and preferably 5 mm or less, more preferably 2 mm or less, more specifically. Is preferably 5 to 0.5 mm, more preferably 2 to 1 mm.
The width W3 (see FIG. 4) in the vicinity of the MD defining member corresponding portion of the second layer 9 (the portion overlapping the MD defining member 83 in the plan view of the accumulation recess 22) is preferably 1 mm or more, more preferably 2 mm. As described above, it is preferably 10 mm or less, more preferably 5 mm or less, more specifically, preferably 10 to 1 mm, and more preferably 5 to 2 mm.
The width W4 (see FIG. 4) of the MD defining member 83 of the first layer 8 is preferably 0.5 mm or more, more preferably 1 mm or more, and preferably 5 mm or less, more preferably 2 mm or less, more specifically. Is preferably 5 to 0.5 mm, more preferably 2 to 1 mm.

The length W5 (see FIG. 2) of the first opening 81 in the 2X direction is preferably 5 mm or more, more preferably 10 mm or more, and preferably 30 mm or less, more preferably 25 mm or less, more specifically, preferably Is 5 to 30 mm, more preferably 10 to 25 mm.
The length W6 of the first opening 81 in the 2Y direction (see FIG. 2) is preferably 5 mm or more, more preferably 10 mm or more, and preferably 20 mm or less, more preferably 15 mm or less, more specifically preferably Is 5 to 20 mm, more preferably 10 to 15 mm.
The length W7 of the second opening 91 in the 2X direction (see FIG. 2) is preferably 2 mm or more, more preferably 5 mm or more, and preferably 30 mm or less, more preferably 25 mm or less, more specifically, preferably Is 30-2 mm, more preferably 25-5 mm.
The length W8 (see FIG. 2) of the second opening 91 in the 2Y direction is preferably 2 mm or more, more preferably 5 mm or more, and preferably 20 mm or less, more preferably 15 mm or less, more specifically preferably Is 20 to 2 mm, more preferably 15 to 5 mm.

The ratio (S2 / S1) of the opening area S2 of the second opening 91 to the opening area S1 of the first opening 81 is preferably 50 to 5%, more preferably 15 to 7%.
The thickness T (see FIG. 5) of the opening defining portion 82 (MD defining member 83, CD defining member 84) of the first layer 8 is preferably 2 mm or more, more preferably 3 mm or more, and preferably 10 mm. Hereinafter, it is further preferably 5 mm or less, more specifically preferably 10 to 2 mm, and further preferably 5 to 3 mm.

  In the first embodiment, the adjusting body 10 (the first layer 8 and the second layer 9) is not arranged corresponding to the entire area of the porous plate 27, and as shown in FIG. On the inner surface 27 b side of the plate 27, the plate is disposed only in the region corresponding to the rear side in the transport direction R <b> 2 of the accumulation recess 22, and is not disposed in other regions including the front side. That is, the accumulation concave portion 22 includes an adjustment body arrangement region 24 in which the adjustment body 10 is disposed on the inner surface 27b side of the porous plate 27 that forms the bottom surface 22a of the concave portion 22, and an inner surface 27b side of the porous plate 27. And an adjustment body non-arrangement region 23 in which the adjustment body 10 is not arranged.

  The adjustment member non-arrangement region 23 of the concave portion 22 will be further described. As shown in FIG. 3, the space plate 26 penetrates the space plate 26 in the thickness direction in the portion other than the first layer 8, and the first opening portion. A first large opening 85 having a rectangular shape in plan view having a larger opening area than 81 is formed, and the suction adjustment plate 25 has a rectangular shape in plan view that penetrates the suction adjustment plate 25 in the thickness direction. Two large openings 95 are formed corresponding to the first large openings 85. The openings 85 and 95 have a congruent relationship in plan view, and the second large opening 95 has a similarity ratio of 1 to the first large opening 85.

  The openings 85 and 95 have a size that overlaps with the entire area of the adjustment body non-arrangement region 23 of the recess 22 in plan view of the accumulation recess 22. As shown in FIG. 6, the substantially entire region on the inner surface 27 b side of the porous plate 27 is both openings 85 and 95. Therefore, in the adjustment body non-arrangement region 23 of the recess 22, the air permeability inherent to the porous plate 27 is not hindered, and the amount of air flow (vacuum air) generated by suction from the inside of the apparatus and sucking the molded body material is Therefore, compared with the adjustment body arrangement | positioning area | region 24 of the recessed part 22, a molded object material is piled up by high basic weight.

  As described above, the concave portion 22 for accumulation in the first embodiment has an adjustment body non-arrangement region (high basis weight pile fiber region) 23 for stacking the molded body material at a relatively high basis weight and the molded body material relative to each other. The adjustment body arrangement | positioning area | region (low basic weight accumulation fiber area | region) 24 which piles up to low basic weight is provided in the conveyance direction R2 (longitudinal direction) of this recessed part 22 (refer FIG. 2). The adjustment body non-arrangement region (high basis weight pile fiber region) 23 is not provided with the adjustment body 10 on the inner surface 27b side of the porous plate 27 that forms the bottom surface 22a of the concave portion 22 for accumulation. The adjustment body 10 is arranged on the inner surface 27 b side of the porous plate 27 in the low basis weight pile fiber region) 24.

  The fiber stacking apparatus 1 according to the first embodiment will be further described. As shown in FIG. 1, the inner side (rotary shaft side) of the rotary drum 2 is partitioned in the circumferential direction (2X direction) of the rotary drum 2. Spaces B, C, and D are formed. A known exhaust device (not shown) such as an intake fan is connected to the space B, and the space B can be maintained at a negative pressure by operating the exhaust device. External air flows into the space C by suction from the vacuum box 11 side, which will be described later, and external air flows into the space D by suction from the transfer roll 5 side. The space C is separated from the space D, which is a region after the transfer, in order to satisfactorily perform the transfer on the space C (transfer of the piled material in the recess 22 to the transfer roll 5 or the like). The rotary drum 2 is placed in a space (space C) corresponding to the transfer position of the piled material in the concave portion 22 to the transfer roll 5 from the inside of the rotary drum 2 to the bottom surface 22a (porous plate 27) of the concave portion 22. You may have the means of generating the blow (air flow) which goes. In that case, release from the concave portion 22 can be promoted by positively blowing from the space C toward the vacuum box 11 using the generating means. The rotating drum 2 has one end in the axial direction of the rotating shaft sealed with a plate that rotates integrally with the rotating drum 2, and the other end sealed airtight with a plate that does not rotate. The spaces B to D are partitioned by a plate provided from the rotating shaft side of the rotating drum 2 toward the inner surface of the rotating drum 2.

  The space C is normally set to a negative pressure or zero pressure (atmospheric pressure) that is weaker than the space B. From the viewpoint of transportability of the piled material, the space C is made a weak negative pressure and the piled material is sucked into the recessed portion 22 until the piled material in the accumulation recess 22 is transferred onto the transfer roll 5. However, if there is no particular problem in transportability, the space C is preferably zero pressure in consideration of transferability. Further, since the space D is a region through which the concave portion 22 passes after the piled material in the concave portion 22 is transferred onto the transfer roll 5, a zero pressure or a positive pressure is preferable.

  As shown in FIG. 1, one end side of the duct 4 covers the outer peripheral surface of the rotating drum 2 positioned on the space B, and a molded material material introducing device is provided on the other end side (not shown). . The molded body material introducing device includes, for example, a pulverizer that pulverizes sheet-like wood pulp into defibrated pulp and feeds the defibrated pulp (fiber material) into the duct 4. A water-absorbing polymer introduction part for introducing water-absorbing polymer particles in the middle of the duct 4 can also be provided.

  The transfer roll 5 has a cylindrical outer peripheral portion having air permeability, and the outer peripheral portion rotates around a horizontal axis upon receiving power from a prime mover such as a motor. In the non-rotating portion on the inner side (rotating shaft side) of the transfer roll 5, a space E in which the inside can be decompressed is formed. A known exhaust device (not shown) such as an intake fan is connected to the space E, and the interior of the space E can be maintained at a negative pressure by operating the exhaust device.

  On the outer peripheral surface of the transfer roll 5, a plurality (several numbers) of suction holes communicating between the inside and the outside are formed. While these suction holes pass over the space E maintained at a negative pressure, air is sucked into the inside from the outside, and the piled material in the recess 22 is drawn from above the rotary drum 2 by the suction force. It moves smoothly onto the transfer roll 5.

  The vacuum conveyor 6 includes an endless breathable belt 63 laid across a drive roll 61 and driven rolls 62, 62, and a vacuum box 64 disposed at a position facing the transfer roll 5 with the breathable belt 63 interposed therebetween. It has.

  The vacuum box 11 has a box-like shape having upper and lower surfaces, left and right side surfaces, and a rear surface, and has an opening that opens toward the rotating drum 2. The vacuum box 11 is connected to a known exhaust device (not shown) such as an intake fan via an exhaust pipe (not shown), and the inside of the vacuum box 11 can be maintained at a negative pressure by the operation of the exhaust device. It is. The mesh belt 13 is a belt-like breathable belt having a mesh connected endlessly, and is continuously guided along a plurality of free rolls 14 and transfer rolls 5 to move along a predetermined path. The mesh belt 13 is driven by the rotation of the transfer roll 5. As shown in FIG. 1, the mesh belt 13 is introduced on the outer peripheral surface of the rotating drum 2 in the vicinity of the downstream end portion 41 of the duct 4 and then between the vacuum box 11 and the rotating drum 2 and the transfer roll. 5 and the rotating drum 2 are arranged so as to pass sequentially. While the mesh belt 13 passes in front of the opening of the vacuum box 11, the mesh belt 13 is in contact with the outer peripheral surface of the rotating drum 2, and the rotating drum is in the vicinity of the closest portion between the transfer roll 5 and the rotating drum 2. 2 moves away from the outer peripheral surface of 2 and onto the transfer roll 5.

  The mesh belt 13 has small pores as compared to the suction holes of the transfer roll 5, and suction from the pores of the mesh belt 13 that overlaps with the suction holes with suction from the suction holes of the transfer roll 5. Done. A pair of windbreak plates 15 are provided on both sides of the area where the suction holes are formed in the width direction of the outer peripheral surface of the transfer roll 5 to prevent or reduce the inflow of wind from the side, This prevents the piled article released from the concave portion 22 from being deformed. The material of the windbreak plate 15 is not particularly limited, but is preferably made of metal or synthetic resin and has a thickness of about 0.5 to 10 mm from the viewpoint of giving rigidity that can resist wind.

  As the cutting device 7, for example, in the manufacture of absorbent articles such as sanitary napkins and diapers, those conventionally used for cutting the absorbent continuous body can be used without particular limitation. The cutting device 7 shown in FIG. 1 includes a cutter roll 72 having a cutting blade 71 on the peripheral surface and an anvil roll 73 having a smooth peripheral surface for receiving the cutting blade.

  Next, an embodiment of a method for continuously producing an absorbent body using the fiber stacking apparatus 1 described above, that is, an embodiment of a method for producing the absorbent body of the present invention will be described. The manufacturing method according to the present embodiment includes a fiber stacking step in which the absorbent body material (molded body material) supplied in an air flow is sucked into the stacking concave portion 2 of the rotary drum 2 in the fiber stacking apparatus 1 and stacked. To do.

  Prior to performing the fiber stacking step, first, the exhaust device connected to each of the space B in the rotating drum 2, the space E in the transfer roll 5, and the vacuum box 11 is operated to make negative pressure. By making negative pressure in the space B, an air flow (vacuum air) is generated in the duct 4 to convey the absorbent material to the outer peripheral surface 21 of the rotary drum 2. Further, the rotary drum 2 and the transfer roll 5 are rotated, and the vacuum conveyor 6 is operated.

  Then, when the molded body material introduction device is operated to supply the absorbent body material into the duct 4, the absorbent body material rides on the air flow flowing through the duct 4 and becomes scattered, and the outer periphery of the rotary drum 2. Supplied towards the surface 21.

  While the portion covered with the duct 4 is being conveyed, the absorbent material is sucked into the accumulation recess 22 of the rotary drum 2 and piled up. The individual recesses 22 of the rotary drum 2 are sucked from the bottom surface 22a while passing over the space B maintained at a negative pressure. The absorber raw material introduced from the molding material introduction device or the water-absorbing polymer introduction portion into the duct 4 by suction from the suction hole of the porous plate 27 forming the bottom surface 22a. An air flow to be transported is generated, and the absorbent material transported on the air flow is piled in the recess 22. As described above, in the recess 22, due to the presence / absence of the arrangement of the adjusting body 10, the amount of accumulated absorbent material is set to be different. The high basis weight stacking region) 23 is relatively high in the basis weight, and the adjustment body arrangement region (low basis weight stacking region) 24 is stacked in the relatively low basis weight (see FIG. 2). When the recess 22 passes the downstream end 41 of the duct 4, the adjustment member non-arrangement region 23 is completely covered with the absorber raw material, whereas the adjustment member arrangement region 24 is the absorber raw material. Is not completely covered by. Therefore, the surface of the fiber pile in the concave portion 22 (the surface opposite to the contact surface with the bottom surface 22a of the concave portion 22) absorbs at the boundary between the adjustment body non-arrangement region 23 and the adjustment body arrangement region 24. A level difference due to the difference in the amount of fiber of the body material is formed, and the surface of the adjustment body arrangement region 24 is located at a relatively low position with respect to the surface of the adjustment body non-arrangement region 23.

  In this way, after the absorbent material is stacked in the accumulation recess 22 to obtain the stacked product 32, the rotary drum 2 is further rotated. When the pile 32 in the recess 22 comes to a position opposite to the vacuum box 11, it is sucked to the mesh belt 13 by suction from the vacuum box 11, and in this state, rotates with the transfer roll 5. It is transported to the closest part to the drum 2 or the vicinity thereof. The pile 32 in the state of being sucked onto the mesh belt 13 is released from the recess 22 by suction from the transfer roll 5 side and transferred onto the transfer roll 5 together with the mesh belt 13.

  FIG. 7 shows the pile 32 immediately after releasing from the accumulation recess 22 of the first embodiment. As shown in FIG. 7, the piled product 32 has a portion corresponding to the adjustment body non-arranged region (high basis weight piled region) 23 of the recess 22, which has a relatively large amount of piled absorbent material. The portion corresponding to the adjustment part arrangement region (low basis weight product fiber region) 24 of the weight part (thick part) 33 and the recess 22 is a low basis weight part (thin part) where the amount of fiber of the absorbent material is relatively small. ) 34. Further, one surface 32b (contact surface with the bottom surface 22a of the concave portion 22) of the piled article 32 is substantially flat, while the other surface 32a (opposite to the contact surface with the bottom surface 22a of the concave portion 22). The side surface) has a step at the boundary between the high basis weight portion 33 and the low basis weight portion 34 and is not flat.

  The piled product 32 transferred onto the transfer roll 5 is conveyed while receiving suction from the transfer roll 5 side, and is introduced onto a vacuum conveyor 6 disposed below the transfer roll 5. It is delivered onto a core wrap sheet 37 made of a conductive nonwoven fabric or the like. Thereafter, as shown in FIG. 1, both side portions along the conveying direction of the core wrap sheet 37 are folded back, and the upper and lower surfaces of the piled article 32 are covered with the core wrap sheet 37. Then, the piled article 32 covered with the core wrap sheet 37 is cut into a predetermined size by the cutter roll 72 of the cutting device 7 together with the core wrap sheet 37. Thus, the absorbent body 3 covered with the core wrap sheet 37 is obtained.

  The absorbent body 3 includes a high basis weight portion 33 having a relatively high basis weight stacked in the adjustment body non-arrangement region (high basis weight product fiber region) 23 of the recess 22 and an adjustment body arrangement region (low basis weight product fiber). Region) 24 and a low basis weight portion 34 having a relatively low basis weight, and the absorbent material is partially different in the amount of fiber. Due to the action of the adjusting body 10 described above, the absorbent body 3 (particularly, the low basis weight portion 34) does not show uneven accumulation, and the absorbent body 3 can be used for absorbent articles such as disposable diapers, sanitary napkins, and incontinence pads. It has a high quality suitable as an absorber to be used. In particular, the absorbent body used in the disposable diaper is incorporated in the absorbent article so that the high basis weight portion 33 of the absorbent body 3 is the ventral side (front side) and the low basis weight portion 34 is the back side (rear side). It is preferable that the performance of the absorber 3 is maximized. As described above, forming a high basis weight part and a low basis weight part having different basis weights (amount of raw material accumulated) in the absorbent body has advantages such as obtaining an absorbent body that is flexible and improved in wearing feeling. . In particular, an absorbent body in which a low basis weight part is formed before and after or around a high basis weight part is flexible and excellent in wearing feeling.

  Hereinafter, other embodiments of the present invention will be described. In other embodiments described later, components different from those of the first embodiment described above will be mainly described, and similar components will be denoted by the same reference numerals and description thereof will be omitted. The description of the first embodiment described above is appropriately applied to components that are not particularly described.

  FIG. 8 shows an essential part of the second embodiment of the fiber stacking apparatus of the present invention, and FIG. 9 shows an exploded perspective view of the essential part. In the fiber stacking apparatus of the second embodiment, the recess 22A is partitioned into a plurality of regions in a direction parallel to the bottom surface 22a on at least a part of the outer surface 27a of the porous plate 27 forming the bottom surface 22a of the accumulation recess 22A. The concave partition member 35 is arranged in an overlapping manner.

  In the second embodiment, the space plate 26A has a narrow portion 29 having a relatively short length (width) in the 2Y direction (the width direction of the rotating drum 2) and a relatively long wide portion in the 2X direction (the rotating drum 2). The wide portion is the first layer 8 constituting the adjustment body 10. The narrow portion 29 is formed in a lattice pattern with the same opening pattern as the first layer 8 (the wide portion), and includes a plurality of (a large number of) openings 81A having the same shape and the same size as the first openings 81 of the first layer 8. ) The narrow portion 29 has a rectangular shape in plan view and is located at the center in the 2Y direction of the space plate 26A. The narrow portion 29 entirely overlaps the second large opening 95 of the suction adjustment plate 25 in the plan view of the accumulation recess 22A.

  The recess partitioning member 35 has a plurality of openings 36 that penetrate the recess partitioning member 35 in the thickness direction, and opening defining portions 37 that partition each opening 36. The opening defining portion 37 is formed in a lattice shape in plan view, and each opening portion 36 is located at the grid portion of the lattice-shaped opening defining portion 37 and is viewed in plan view. It has a square shape. The opening defining portion 37 has a non-breathability that prevents air from passing therethrough. The “non-breathable” here is as described above. As a material for forming the non-breathable opening defining portion 37, a metal such as stainless steel, aluminum, iron or the like, a resin, or a combination thereof can be used. The opening defining portion 37 has a rectangular shape in plan view, and is arranged at the center in the 2Y direction of the bottom surface 22a of the concave portion 22A for accumulation, with its longitudinal direction coinciding with the 2X direction. The overall length of the recess partition member 35 in the 2X direction is shorter than that of the space plate 26A, and the length (width) of the recess partition member 35 in the 2Y direction is the same as that of the narrow portion 29 of the space plate 26A. The recess partitioning member 35 has the same opening pattern as the space plate 26A [the narrow portion 29, the first layer (the wide portion)], and the opening 36 has the same shape as the openings 81 and 81A of the space plate 26A. It is the same size. The recess partition member 35 is fixed on the outer surface 27a of the porous plate 27 by a known fixing means such as a bolt or an adhesive so as to completely coincide with the narrow portion 29 in a plan view of the accumulation recess 22A. Yes.

  In the accumulation recess 22A, the adjustment body 10 is not disposed, and a part (2Y) of the adjustment body non-arrangement region (high basis weight accumulation fiber region) 23 for stacking the molded body material at a relatively high basis weight. At the center of the direction), as shown in FIG. 10 (a), one opening 36 of the recess partition member 35 and one opening 81A of the narrow portion 29 of the space plate 26A are in a one-to-one relationship. It corresponds with. Moreover, in the adjustment body arrangement | positioning area | region (low basic weight accumulation fiber area | region) 24 which arrange | positions the adjustment body 10 and fiber-forms a molded object material to a relatively low basic weight, as shown in FIG.10 (b), One opening 36 of the recess partitioning member 35, one first opening 81 of the first layer 8 (the wide portion) of the space plate 26A, and one second of the second layer 9 of the suction adjustment plate 25. Each of the two openings 91 has a one-to-one correspondence. In other words, the adjustment body arrangement region 24 includes the opening 36 of the recess partition member 35 and the opening that penetrates the adjustment body 10 in the thickness direction (both openings 81 and 91 that overlap each other) in the plan view of the recess 22. The opening).

  The fiber stacking apparatus of the second embodiment provided with the rotating drum having the accumulation recess 22A having such a configuration can be used in the same manner as the fiber stacking apparatus of the first embodiment described above, and according to the manufacturing method described above. The absorber can be manufactured continuously. While the recess 22A passes over the space B (see FIG. 1) maintained at the negative pressure of the space drum 2, the bottom surface 22a of the recess 22A has a portion corresponding to the opening 36 of the recess partition member 35. While suction is normally performed from the bottom surface 22a, an opening portion is defined at a portion corresponding to the opening portion defining portion 37 of the concave section member 35 (a contact portion with the opening portion defining portion 37 of the bottom surface 22a). Since the part 37 is impermeable, suction from the bottom surface 22a is not performed. However, in the second embodiment, the absorbent material is stacked not only on the opening 36 but also on the opening defining part 37. The absorbent material is spread only in the opening 36 on the upstream side of the duct 4, and when the height of the loaded absorbent material reaches the thickness of the opening defining portion 37 (recessed partition member 35), In accordance with the entanglement between the absorbent raw materials and the flow of air in the duct 4 that conveys the absorbent raw materials, the absorbent raw material begins to pile on the opening defining portion 37 as well. When the recess 22 passes through the downstream end 41 of the duct 4, the opening defining portion 37 is completely covered with the absorbent material.

  FIG. 11 shows the piled article 32A immediately after being released from the accumulation recess 22A in the manufacturing method described above. As shown in FIG. 11, the piled product 32 </ b> A has a portion corresponding to the adjustment body non-arrangement region (high basis weight pile fiber region) 23 of the recess 22 </ b> A, and the amount of pile of the absorbent material is relatively high The portion corresponding to the adjustment portion arrangement region (low basis weight product fiber region) 24 of the mass portion (thick portion) 33 and the recess 22A is a low basis weight portion (thin portion) with a relatively small amount of absorbent material. ) 34. Further, on one surface 32Ab (contact surface with the bottom surface 22a of the recess 22A) of the piled article 32A, as shown in FIG. 11, corresponding to the lattice-shaped opening defining portion 37 of the recess partition member 35. A plurality of continuous straight groove portions (recess portions) 38 extending in both the 2X direction and the 2Y direction are arranged in a lattice shape, and the plurality of openings 36 of the recess partition member 35 are formed in the lattice portion. Correspondingly, convex portions 39 having a quadrangular shape in plan view are arranged, and one surface 32Ab has uneven portions having large undulations. On one surface 32Ab, the region where the concave and convex portion including the groove portion 38 and the convex portion 39 is not formed (the region around the concave and convex portion) and the top portion of the convex portion 39 are substantially flush with each other. On the other hand, the other surface 32Aa (the surface opposite to the contact surface with the bottom surface 22a of the recess 22A) of the piled fabric 32 has a high basis weight in the same manner as the other surface 32a of the piled fabric 32 shown in FIG. There is a step at the boundary between the portion 33 and the low basis weight portion 34, and it is not flat.

  As described above, the piled fiber 32A has a thick portion (high basis weight portion) 33 and a thin portion (low basis weight portion) 34 formed due to the presence or absence of the arrangement of the adjusting body 10, and the On one surface 32Ab of each of the thick portion 33 and the thin portion 34 (contact surface with the bottom surface 22a of the concave portion 22A), the convex portion 39 (high basis weight portion) and the groove portion 38 corresponding to the opening pattern of the concave portion partitioning member 35. It has an uneven part consisting of (low basis weight part). When an absorber having such a concavo-convex portion (absorber having a non-flat surface) is pressed with a press device or the like, and its thickness, particularly the thickness of the convex portion (high basis weight portion) is actively reduced, The difference in thickness and / or thickness ratio between the convex portion (high basis weight portion) and the groove portion (low basis weight portion) decreases, and the convex portion (high basis weight portion) has a high density portion, and the groove portion (low basis weight portion). An absorber having a low density part is obtained. Such absorbers with partially different densities, for example, can quickly permeate bodily fluids at low density parts and absorb and fix bodily fluids at high density parts, improving the absorption performance. In addition, due to the action of the adjusting body 10, the piled fabric 32 </ b> A (particularly the low basis weight portion 34) does not show any piled fabric unevenness, and the piled fabric 32 </ b> A absorbs disposable diapers, sanitary napkins, incontinence pads and the like. It can be suitably used as an absorbent for use in articles.

  By the way, regarding the adjustment body 10, in the said embodiment (1st and 2nd embodiment), one 2nd opening part of the 2nd layer 9 with respect to 1 1st opening part 81 of the 1st layer 8. FIG. 91 corresponds, and the first opening 81 and the second opening 91 correspond one-to-one. However, as shown in FIG. 12, one first opening 81 in the first layer 8. On the other hand, a plurality of second openings 91 of the second layer 9 may correspond. 12 (a) to 12 (c), a plurality of second openings 91 having a circular shape in plan view correspond to one first opening portion 81 having a rectangular shape in plan view. 12 (d) and 12 (e), a plurality of second openings 91 having a rectangular shape in plan view correspond to one rectangular opening having a rectangular shape in plan view. In any of the forms shown in FIG. 12, the first opening 81 and the second opening 91 corresponding to the first opening 81 are not in a similar relationship in plan view. In FIG. 12, the hatched part is a non-breathable part that does not allow air to pass through. In FIG. 12, the porous plate 27 is not shown for easy explanation.

  When a plurality of second openings 91 correspond to one first opening 81 as in the form shown in FIG. 12, the first opening 81 is maintained at the negative pressure of the rotating drum 2. When entering the space, the air flow flows through the plurality of second openings 91 in the first opening 81 substantially simultaneously, so that the rectifying effect by the first opening 81 is more reliably ensured. 12A and 12D, the plurality of second openings 91 take into account the transport direction of the accumulation recess 22 (the direction parallel to the 2X direction). As shown in FIG. 4, it is preferable to arrange them in a line in a direction (2Y direction) orthogonal to the conveying direction of the recesses 22.

  This invention is not restrict | limited to the said embodiment, It can change suitably. For example, in the first and second embodiments described above, the second opening 91 is located away from both the CD defining member 84 and the MD defining member 83 and both defining members of the second layer 9 are used. 83 and 84 and the vicinity thereof (92, 93) are non-breathable parts, but in the present invention, at least the second opening 91 is at a position separated from the CD defining member 84, In addition, the portion of the second layer 9 that overlaps with the CD defining member 84 and the vicinity thereof may be a non-breathable portion. Therefore, as shown in FIG. 13, the second opening 91 may be continuous so as to straddle the plurality of first openings 81 in the 2Y direction. In the form shown in FIG. 13, each of the plurality of second openings 91 is continuous over substantially the entire length of the recess 22 in the 2Y direction. Therefore, the plurality of first openings 81 are in the 2Y direction. Via the continuous 2nd opening part 91, it is mutually connected so that an air flow can pass in 2Y direction.

  The adjusting body according to the present invention has a plurality of openings that penetrate the adjusting body in the thickness direction, and the opening is relatively close to the opening end that is relatively far from the porous member. As long as the opening area is smaller than that of the opening end, the configuration is not limited to the above embodiment. For example, in the first embodiment, the first layer 8 and the second layer 9 constituting the adjustment body 10 are separate bodies (see FIG. 5), but both layers 8 and 9 are integrally formed (the adjustment body 10 is It may be formed from a single-layer plate (see FIG. 14A).

  Further, in the first and second embodiments, the cross-sectional view shape (the cross-sectional shape in the direction parallel to the rotation axis of the rotary drum 2) of the plurality of openings penetrating the adjustment body 10 in the thickness direction is shown in FIG. ), Vertical wall portions 71 (part of the first layer 8) and 72 parallel to the normal direction of the outer peripheral surface 21 of the rotary drum 2 (the thickness direction of the adjusting body 10; the vertical direction in FIG. 14). (Part of the second layer 9) and the horizontal wall portion 73 (MD definition of the second layer 9) parallel to the normal direction (thickness direction of the adjusting body 10) and the direction (left-right direction in FIG. 14) perpendicular to the normal direction. And a flat stepped portion made of a horizontal wall portion 73 at or near the center in the thickness direction. The sectional view shape of the opening according to the present invention is not limited to that shown in FIG. 14 (a), and for example, as shown in FIG. 14 (b), it is a shape partially including a curved wall portion. Alternatively, as shown in FIG. 14C, only the slanted wall portion extending in a direction intersecting the normal direction (thickness direction of the adjusting body 10) (excluding the direction orthogonal to the normal direction). It may be a shape made up of, or as shown in FIG.

  14 (a) to 14 (d) may be integrally formed (formed from a single layer of plate) as shown in the drawing, or in the first and second embodiments. Thus, it may be composed of a plurality of layers that are separate bodies. Further, in the embodiments shown in FIGS. 14A to 14D, the opening end relatively closer to the porous member (porous plate 27) corresponds to the first opening 81 described above, and The far opening end corresponds to the second opening 91 described above. Accordingly, the adjustment body 10 is an integrally molded embodiment (an embodiment formed from a single layer plate), and the adjustment body 10 is also an embodiment having the cross-sectional shapes of FIGS. 14 (a) to 14 (d). The first opening 81 and the second opening 91 are provided as opening ends on one end side and the other end side in the thickness direction, and the description of the arrangement or size of the first opening portion 81 and the second opening portion 91 described above is as follows. Such a configuration in which the adjusting body 10 is integrally formed is also applicable.

  Further, in the first embodiment, the adjusting body 10 is composed of two layers, the first layer 8 and the second layer 9, but is composed of a plurality of layers such as having a third layer and a fourth layer. May be.

In the first and second embodiments, the accumulation recess 22 is intermittently formed in the outer circumferential surface 21 of the rotary drum 2 in the circumferential direction, but is continuously formed over the entire length in the circumferential direction. May be. Further, in the second embodiment, the concave partition member 35 is disposed so as to overlap only a part of the outer surface 27a of the porous plate 27, but may be disposed so as to overlap the entire surface of the outer surface 27a.
All the parts of only one embodiment described above can be used as appropriate.

  In the first and second embodiments, the porous plate 27 forming the bottom surface 22 a of the accumulation recess 22 is flat, but the depth of the recess 22 is reduced between the adjustment body non-arrangement area 23 and the adjustment body arrangement area 24. A step may be provided on the bottom surface 22a so that the height is different. In this case, a step is provided on the bottom surface 22a so that the bottom surface 22a of the adjustment body non-arrangement region 23 is lower than the bottom surface 22a of the adjustment body arrangement region 24, and the recess in the adjustment body non-arrangement region 23 is formed by such a step. The depth 22 is formed deeper than that of the adjusting body arrangement region 24. Further, when the step is provided on the bottom surface 22a in this way, in the second embodiment, the recess partition member 35 is straddled across the step (so that the two regions 23 and 24 having different depths of the recess 22 are straddled). In the case of arrangement, the concave section partition member 35 is deformed into a shape along the bottom surface of the concave section 22 for accumulation, or the adjustment body non-arrangement region in the concave section partition member 35 where the bottom surface 22a is at a relatively low position. It is preferable to increase the thickness at 23.

  The fiber stacking apparatus of the present invention is not limited to the fiber stacking apparatus 1 shown in FIG. 1, and may be configured as a fiber stacking apparatus 1A shown in FIG. In FIG. 15, from the viewpoint of easy explanation, a part of the side surface on the one end side in the axial length direction of the rotating drum 2 (a circular plate in plan view that defines the spaces B, C, and D in the rotating drum 2). Is shown in a transparent state. The fiber stacking apparatus 1 shown in FIG. 1 includes the vacuum box 11 and the windbreak plate 15 as means for stably transferring the fiber pile 32 in the accumulation recess 22 without losing its shape. As shown in FIG. 15, the fiber stacking apparatus 1A does not include such means. In the fiber stacking apparatus 1 </ b> A, the fiber pile 32 in the accumulation recess 22 is placed on the vacuum conveyor 6 disposed below the rotary drum 2 (on the core wrap sheet 37 introduced onto the conveyor 6). The fiber stacking device 1A does not include the transfer roll 5 and the mesh belt 13 that the fiber stacking device 1 had, so that the transfer is performed directly at the lowest point of the rotary drum 2. . In FIG. 15, reference numeral 42 indicates a molded body material introducing device that can also be applied to the fiber stacking apparatus 1, and the molded body material introducing device 42 pulverizes a sheet-like wood pulp 45 by a pulverizer 43 and defibrated pulp. The defibrated pulp (fiber material) is fed into the duct 4. In the middle of the duct 4, a water-absorbing polymer introduction portion 44 for introducing water-absorbing polymer particles is provided.

  In the fiber stacking apparatus 1A shown in FIG. 15, a space B, a space C, and a part of the space D (a region located in the space D on the upstream side in the rotation direction R2 of the rotary drum 2 from the transfer position of the fiber pile 32 ) Is set to a negative pressure, and the pile 32 formed in the accumulation recess 22 in the space B (in the duct 4) remains sucked into the recess 22, and the rotary drum 2 Is transferred to a predetermined transfer position (a position where the rotary drum 2 and the vacuum conveyor 6 are opposed to each other in the space D. The lowest point of the rotary drum 2), and is sucked from the conveyor 6 at the transfer position. The mold is released from the recess 22 and transferred onto the core wrap sheet 37 introduced onto the conveyor 6. At this transfer position, by positively blowing from the space D toward the vacuum conveyor 6, release of the pile 32 from the recess 22 can be promoted. Such a so-called transfer blow promotes the release of the piled product from the accumulation recess when a piled product having a shape that is relatively difficult to lose its shape, such as the piled product 32 shown in FIG. 7, is obtained. It is particularly effective on the above.

  The absorbent body produced in the present invention is preferably used as an absorbent body for absorbent articles. The absorbent article is mainly used to absorb and retain body fluids excreted from the body such as urine and menstrual blood. Absorbent articles include, for example, disposable diapers, sanitary napkins, incontinence pads, panty liners, etc., but are not limited to these, and widely include articles used to absorb liquid discharged from the human body. To do.

  The absorbent article typically includes a top sheet, a back sheet, and a liquid-retaining absorbent body disposed between both sheets. The upper and lower surfaces of the absorber may be covered with one or a plurality of core wrap sheets. The back sheet may or may not have water vapor permeability. The absorbent article may further include various members according to specific uses of the absorbent article. Such members are known to those skilled in the art. For example, when the absorbent article is applied to a disposable diaper or a sanitary napkin, a pair or two or more pairs of three-dimensional guards can be arranged on the outer side of both sides of the absorbent body.

  In addition to the above-described embodiments of the present invention, the following additional notes (stacking device, manufacturing method of absorbent body, and absorbent body) are disclosed.

<1> A molded body that has an accumulation concave portion on which the molding material is piled on the outer surface, and that is conveyed on an air flow generated by suction from the inside while conveying the accumulation concave portion in one direction. A fiber stacking apparatus for stacking a material on a bottom surface of the accumulation recess formed of a porous member having a plurality of suction holes,
On the inner surface side of the porous member, an adjustment body for adjusting the air flow is disposed so as to overlap at least a part of the inner surface of the porous member,
The adjustment body has a plurality of openings that penetrate the adjustment body in the thickness direction, and the opening is an opening end that is relatively close to an opening end that is relatively far from the porous member. A fiber stacking device with a smaller opening area than the part.

<2> The adjustment body is configured by sequentially laminating a first layer and a second layer in the order closer to the porous member,
The first layer has a plurality of first openings penetrating the first layer in the thickness direction, and an opening defining portion for defining each first opening, and the opening defining portion is And an MD defining member extending in the transport direction of the concave portion for accumulation and a CD defining member extending in a direction perpendicular to the transport direction,
A second opening that penetrates the second layer in the thickness direction is formed in a portion of the second layer that overlaps the plurality of first openings in a plan view of the accumulation recess. Each of the plurality of openings is composed of the first opening and the second opening that overlap each other in plan view,
In plan view of the concave portion for accumulation, the second opening is located at a position spaced apart from the CD defining member in each of the plurality of first openings, and the CD defining member in the second layer The stacking apparatus according to <1>, wherein the overlapping portion and the vicinity thereof have a non-breathable property that does not allow air to pass therethrough.

<3> The adjustment body is formed of a single-layer plate, and is relatively far from the first opening, which is the opening end relatively closer to the porous member, and the porous member. The fiber stacking apparatus according to <1>, further including a second opening that is the opening end of the other side.
<4> The ratio (S2 / S1) of the opening area (S2) of the second opening to the opening area (S1) of the first opening is preferably 50 to 5%, more preferably 15 to 7%. The fiber stacking apparatus according to <2> or <3>.

<5> In the plan view of the concave portion for accumulation, the second opening is in a position spaced apart from the MD defining member inside each of the plurality of first openings, and the MD image in the second layer The stacking apparatus according to any one of <2> to <4>, wherein a portion overlapping with the forming member and the vicinity thereof have a non-breathable property that does not allow air to pass therethrough.
<6> The product according to any one of <2> to <5>, wherein the second opening is formed at a center of each of the plurality of first openings in a plan view of the concave portion for accumulation. Textile equipment.
<7> In the planar view of the concave portion for accumulation, the above-described <2> to <6, in which one of the first openings and the second opening existing therein have similar shapes in plan view. > The fiber stacking apparatus according to any one of the above.
<8> The cross-sectional shape of the plurality of openings penetrating the adjustment body in the thickness direction includes a vertical wall portion parallel to the thickness direction of the adjustment body, and a horizontal wall parallel to the direction orthogonal to the thickness direction. The fiber stacking apparatus according to any one of <1> to <7>, further including a flat stepped portion formed of the horizontal wall portion at or near the center in the thickness direction.
<9> The cross-sectional shape of the plurality of openings penetrating the adjustment body in the thickness direction is a shape including a curved wall portion in a part thereof, or an oblique line shape extending in a direction intersecting the thickness direction of the adjustment body The fiber stacking apparatus according to any one of <1> to <8>, wherein the fiber stacking apparatus has a shape that includes only the wall portion of the first portion or a shape that includes the oblique wall portion as a part thereof.
<10> The accumulation recess includes an adjustment body arrangement region in which the adjustment body is disposed on the inner surface side of the porous member forming the bottom surface of the accumulation recess, and the adjustment on the inner surface side of the porous member. The adjustment body non-arrangement region in which the body is not arranged, and the adjustment body non-arrangement region, the <1> to < The fiber stacking apparatus according to any one of 9>.
<11> At least a part of the outer surface of the porous member forming the bottom surface of the concave portion for accumulation is provided with a concave portion partitioning member that divides the concave portion into a plurality of regions in a direction parallel to the bottom surface. The fiber stacking apparatus according to any one of <1> to <10>.
<12> The concave section member has a plurality of openings penetrating the concave section member in the thickness direction, and the opening of the concave section member and the adjustment body in the plan view of the stacking concave section. The fiber stacking apparatus according to <11>, wherein the opening that penetrates in the thickness direction overlaps.

<13> The fiber stacking apparatus includes a rotating drum and a duct for supplying a molded body material to the outer peripheral surface of the rotating drum, and the rotating drum has the accumulation concave portion on the outer peripheral surface. The fiber stacking apparatus according to any one of <1> to <12>.
<14> The rotating drum includes a cylindrical drum body, a suction adjustment plate fixed to be overlapped on an outer periphery of the drum body, a space plate fixed to be overlapped on the outer surface side of the suction adjustment plate, A porous plate which is the porous member fixed to be overlapped on the outer surface side of the space plate; and a pattern forming plate which is fixed to be overlapped on the outer surface side of the porous plate; The fiber stacking device according to <13>, which includes an adjustment plate and the space plate.

<15> A method for producing an absorbent body using the fiber stacking apparatus according to any one of <1> to <14>,
The manufacturing method of an absorber which comprises the fiber-splitting process which attracts | sucks the compact | molding | casting body material which is the raw material of the absorber supplied on the airflow to the accumulation recessed part of the said fiber-stacking apparatus.

<16> The molded body material has a relatively high basis weight in an area where the adjustment body is not disposed on the inner surface side of the porous member in the accumulation recess (the adjustment body non-arrangement area). The absorption according to <15>, wherein the accumulation recess has a relatively low basis weight in a region where the adjustment body is disposed on the inner surface side of the porous member (the adjustment body arrangement region). Body manufacturing method.

<17> An absorbent body manufactured using the fiber stacking apparatus according to any one of <1> to <14>, wherein the adjustment body is disposed on an inner surface side of the porous member in the accumulation recess. The portion corresponding to the region where the material is not disposed (adjustment body non-arrangement region) is a high basis weight portion in which the amount of the absorbent material (molded material) is relatively large, and the inner surface side of the porous member The absorbent body in which the portion corresponding to the region where the adjustment body is disposed (adjustment body arrangement region) is a low basis weight portion with a relatively small amount of absorbent material (molded body material).
<18> The absorbent body according to <17>, wherein the high basis weight part is a thick part, and the low basis weight part is a thin part.
<19> As for the said absorber, the whole area is substantially flat, and the other surface has a level | step difference in the boundary part of the said high basic weight part and the said low basic weight part <17> or <18>.
<20> The absorber has a plurality of continuous straight grooves in one plane, arranged in a lattice pattern, and convex and concave portions in a square shape in a plan view disposed in a portion of the lattice. The absorbent body according to any one of <17> to <19>, which has a portion.
<21> The absorbent body according to <20>, wherein a top portion of the convex portion constituting the concave-convex portion and a region where the concave-convex portion is not formed are substantially flush with each other on one surface of the absorber. .

1,1A Stacking device 2 Rotating drum 22, 22A Stacking recess 22a Bottom surface 23 of stacking recess 23 Adjustment body non-arrangement region (high basis weight stacking region)
24 Adjustment body arrangement area (low basis weight pile fiber area)
25 Suction adjustment plates 26, 26A Space plate 27 Porous plate (porous member)
28 pattern forming plate 10 adjusting body 8 first layer 81 first opening 82 opening defining part 83 MD defining member 84 CD defining member 85 first large opening 9 second layer 91 second opening 92 second The portion overlapping the CD defining member in the layer (CD defining member corresponding portion) and its vicinity 93 The portion overlapping the MD defining member in the second layer (MD defining member corresponding portion) and the vicinity 95 Second large opening 3 Absorbent bodies 32, 32A Stacked material 33 High basis weight portion 34 Low basis weight portion 35 Recess partition member 36 Open portion 37 of recess partition member Open portion defining portion of recess partition member

Claims (9)

A molding body material that is carried on an air flow generated by suction from the inside while having a concave portion for accumulation in which the molding body material is stacked on the outer surface, and conveying the concave portion for accumulation in one direction, A fiber stacking device for stacking on the bottom surface of the concave portion for accumulation formed by a porous member having a plurality of suction holes,
On the inner surface side of the porous member, an adjustment body for adjusting the air flow is disposed so as to overlap at least a part of the inner surface of the porous member,
The adjustment body has a plurality of openings that penetrate the adjustment body in the thickness direction, and the opening is an opening end that is relatively close to an opening end that is relatively far from the porous member. A fiber stacking device with a smaller opening area than the part. The adjustment body is configured by sequentially laminating a first layer and a second layer in the order closer to the porous member,
The first layer has a plurality of first openings penetrating the first layer in the thickness direction, and an opening defining portion for defining each first opening, and the opening defining portion is And an MD defining member extending in the transport direction of the concave portion for accumulation and a CD defining member extending in a direction perpendicular to the transport direction,
A second opening that penetrates the second layer in the thickness direction is formed in a portion of the second layer that overlaps the plurality of first openings in a plan view of the accumulation recess. Each of the plurality of openings is composed of the first opening and the second opening that overlap each other in plan view,
In plan view of the concave portion for accumulation, the second opening is located at a position spaced apart from the CD defining member in each of the plurality of first openings, and the CD defining member in the second layer The fiber stacking apparatus according to claim 1, wherein the overlapping portion and the vicinity thereof have a non-breathable property that does not allow air to pass therethrough.   In the planar view of the concave portion for accumulation, the second opening is in a position spaced apart from the MD defining member inside each of the plurality of first openings, and the MD defining member in the second layer The fiber stacking apparatus according to claim 2, wherein the overlapping portion and the vicinity thereof have non-breathability that prevents air from passing therethrough.   The fiber stacking apparatus according to claim 2 or 3, wherein the second opening is formed at a center of each of the plurality of first openings in a plan view of the accumulation recess.   5. The planar view of one of the first recesses and the second opening existing inside the first recess is similar to each other in plan view of the recesses for accumulation. The fiber stacking apparatus described in 1.   The accumulation recess includes an adjustment body arrangement region in which the adjustment body is disposed on the inner surface side of the porous member forming the bottom surface of the accumulation recess, and the adjustment body is disposed on the inner surface side of the porous member. The adjustment body non-arrangement region that is not formed, and the adjustment body non-arrangement region, the molded body material is stacked in a high basis weight as compared with the adjustment body arrangement region. The fiber stacking apparatus according to item.   A recess partition member for partitioning the recess into a plurality of regions in a direction parallel to the bottom surface is disposed on at least a part of the outer surface of the porous member forming the bottom surface of the accumulation recess. The fiber stacking apparatus according to any one of 1 to 6.   The concave section member has a plurality of openings penetrating the concave section member in the thickness direction, and the opening section of the concave section member and the adjustment body are disposed in the thickness direction in a plan view of the stacking concave section. The fiber stacking apparatus according to claim 7, wherein the penetrating opening is overlapped. A method for producing an absorbent body using the fiber stacking device according to any one of claims 1 to 8,
The manufacturing method of an absorber which comprises the fiber-splitting process which attracts | sucks the compact | molding | casting body material which is the raw material of the absorber supplied on the airflow to the accumulation recessed part of the said fiber-stacking apparatus.

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