JP2015112300A - Absorber manufacturing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorber manufacturing apparatus hardly generating disorder in a fiber laminate obtained by fiber-laminating the raw material of an absorber in a recess of a rotary drum, and capable of stably manufacturing the absorber.SOLUTION: An absorber manufacturing apparatus 1 includes: a rotary drum 2 having an accumulating recess 22 on an outer peripheral surface 21; a duct 4 supplying the raw material of an absorber to the outer peripheral surface 21; and a winding belt 5 adjacent to the downstream side of the duct 4 and pushing a fiber laminate 31 of the raw material of the absorber, accumulated in the accumulating recess 22. The rotary drum 2 includes a non-rotary drum body 23 in the inside than a member 20 forming the outer peripheral surface 21. The drum body 23 has an independent space partitioned by a partition plate 24 provided from the center shaft side to the outer peripheral surface 21 side. When the member 20 rotates, air flow is not generated from a space B covered by the winding belt 5 to a negative pressure space A covered by the duct 4 through the accumulating recess 22.

Description

  The present invention relates to an absorber manufacturing apparatus.

  Absorbers used in absorbent articles such as disposable diapers, sanitary napkins, incontinence pads, etc. are placed on an air flow, and the raw materials of the absorber are sucked into the recesses formed on the outer peripheral surface of the rotating drum, and piled up. Subsequently, the piled fiber that has been piled in the concave portion is coated with a water-permeable sheet material.

  The present applicant firstly rotates a rotating drum, a duct for supplying a fiber material that is a raw material of the absorber to the outer peripheral surface of the rotating drum, a transfer roll disposed obliquely below the rotating drum, A vacuum box disposed between the duct and the transfer roll 5 in the circumferential direction of the drum; and a mesh belt disposed between the vacuum box and the rotary drum and between the transfer roll and the rotary drum. The manufacturing apparatus of the absorber which has been proposed (patent document 1).

  According to the absorbent body manufacturing apparatus described in Patent Document 1, the piled product obtained by sucking and stacking the raw material into the concave portion of the rotating drum falls on the transfer roll, or the arrangement of the stacked product on the roll Disturbance can be prevented, and an absorbent body in which a plurality of piled articles are arranged in a predetermined pattern can be efficiently manufactured.

JP 2011-130856 A

  In recent years, in particular, an absorbent body used for a sanitary napkin has been thinned from the viewpoint of improving fit and appearance. When such a thin absorber is manufactured by the absorber manufacturing apparatus described in Patent Document 1, since the piled material to be stacked in the concave portion of the rotating drum is thin, the flow of air by suction from the inside of the rotating drum As a result, the shape of the piled fabric may be disturbed. As described above, the absorber manufacturing apparatus described in Patent Document 1 has room for further improvement.

  Therefore, this invention is providing the manufacturing apparatus of the absorber which can eliminate the fault which the prior art mentioned above has.

  The present invention provides a rotating drum having an accumulation recess for collecting the raw material of the absorber on the outer peripheral surface, a duct for supplying the raw material of the absorber in a scattered state toward the outer peripheral surface of the rotating drum, An absorbent body manufacturing apparatus having a winding belt that presses down the piled material of the absorbent body material accumulated in the accumulation recesses adjacent to the downstream side, wherein the rotating drum has the outer peripheral surface A drum body that does not rotate inside the member to be formed, and the drum body is a plurality of mutually independent spaces partitioned by a partition plate provided from the central axis side of the rotary drum toward the outer peripheral surface side. When the member that forms the outer peripheral surface is rotating, the duct in the region covered by the winding belt via the accumulation concave portion of the outer peripheral surface is Negative pressure in the covered area In the space, there is provided an apparatus for manufacturing absorbent body air flow is not generated.

  According to the present invention, regardless of the shape of the manufactured absorbent body, it is difficult to cause disturbance in the fiber product obtained by stacking the raw material of the absorbent body in the concave portion of the rotating drum, and the absorbent body is stably manufactured. be able to.

FIG. 1 is a schematic perspective view showing a first embodiment of an absorbent body manufacturing apparatus according to the present invention. FIG. 2 is a schematic perspective view showing a drum body included in the manufacturing apparatus shown in FIG. FIG. 3A is a schematic side view of the manufacturing apparatus shown in FIG. 1 as viewed from the side, and FIG. 3B is an enlarged main portion showing members forming the outer peripheral surface of the manufacturing apparatus shown in FIG. It is sectional drawing. FIG. 4 is a configuration diagram of members that form the outer peripheral surface of the manufacturing apparatus shown in FIG. 1. FIG. 5: is the schematic side view which looked at the manufacturing apparatus of 2nd Embodiment of this invention from the side.

Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings.
FIG. 1 schematically shows a fiber stacking apparatus 1A according to a first preferred embodiment of the absorbent body manufacturing apparatus of the present invention. The fiber stacking apparatus 1 </ b> A of the first embodiment includes a rotating drum 2 having an accumulation recess 22 for accumulating the raw material of the absorbent body 3 on the outer peripheral surface 21, and And a wrapping belt 5 that presses down the piled material 31 of the raw material of the absorbent body 3 that is accumulated in the accumulation recess 22 adjacent to the downstream side of the duct 4. Yes. The fiber stacking apparatus 1 </ b> A of the first embodiment further includes a vacuum conveyor 6 disposed below the rotary drum 2 and a fiber material supply unit 7 that supplies the duct 4 with a fiber material that is a raw material of the absorber. I have.

  As shown in FIG. 1, the rotating drum 2 includes a drum body 23 that does not rotate inward of the member 20 that forms the outer peripheral surface 21. The drum body 23 has a plurality of mutually independent spaces A, B, C... Partitioned by a partition plate 24 provided from the central axis side of the rotary drum 2 toward the outer peripheral surface 21 side. Yes. In FIG. 1, 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 central axis of the rotating drum 2). Hereinafter, the rotating drum 2 will be described in detail.

  As shown in FIGS. 1 and 2, the drum main body 23 has a disk-shaped fixed plate 231, 231 and a cylindrical central shaft portion that connects the fixed plates 231, 231 at both ends in the width direction of the rotary drum 2. 232. The fixed plates 231 and 231 and the central shaft portion 232 are made of a metal rigid body and are integrally formed. Note that FIG. 2 shows a state in which one fixing plate 231 is removed for explaining the inside of the drum main body 23. In the drum body 23, a plurality of metal partition plates 24 are arranged between the both fixed plates 231 and 231 from the outer peripheral surface of the central shaft portion 232 toward the outer peripheral surface 21 side, which is the first embodiment. In the fiber stacking apparatus 1A of the form, four pieces are arranged. Each partition plate 24 extends from the outer peripheral surface of the central shaft portion 232 to the outer peripheral edge of the fixed plate 231. Partitioned by the four partition plates 24, the drum body 23 is formed with four mutually independent spaces A, B, C, and D.

  An intake fan (not shown) is connected to the central shaft portion 232 of the drum body 23, and the pressure in the partitioned spaces A to D in the rotary drum 2 can be adjusted by driving the intake fan. In the fiber stacking apparatus 1A, the space A is maintained at a negative pressure. As shown in FIGS. 1 and 3, the space A is located in a region where the outer peripheral surface 21 is covered with the duct 4. The space B is a space adjacent to the space A, and the outer peripheral surface 21 is located in a region covered with a winding belt 5 described later. The space C is a space adjacent to the space B, and is located in a region where the outer peripheral surface 21 is directed to the vacuum conveyor 6 side. The space D is a space arranged between the space C and the space A, and is located in a region where the outer peripheral surface 21 is directed to the vacuum conveyor 6 side. Thus, the spaces A, B, C, and D are sequentially arranged in that order. The space B of the rotary drum 2 is set to atmospheric pressure (no pressure). The remaining spaces C and D of the rotary drum 2 are set to positive pressure.

  In the absorbent body manufacturing apparatus of the present invention, when the member 20 forming the outer peripheral surface 21 described later is rotating, it is covered with the winding belt 5 described later via the accumulation recess 22 of the outer peripheral surface 21. It is formed so that an air flow does not occur from the atmospheric pressure space B in the closed area to the negative pressure space A in the area covered with the duct 4 described later. In the fiber stacking apparatus 1A of the first embodiment, as shown in FIGS. 2, 3A and 3B, the drum body 23 is a partition closest to the boundary between the duct 4 and the winding belt 5. A plate 8 extending along the circumferential direction 2X of the rotary drum 2 is provided at the tip of the plate 24a. The plate 8 extends from the front end of the partition plate 24a to at least one of the upstream side and the downstream side, and the circumferential length L1 thereof is greater than the circumferential length L2 of the bottom surface 22a of the accumulation recess 22. Is also formed long. More specifically, in the fiber stacking apparatus 1A, the plate 8 includes an upstream plate 81 extending in the circumferential direction 2X from the tip of the partition plate 24a to the upstream side, and a periphery of the partition plate 24a from the tip of the partition plate 24a to the downstream side. A downstream plate 82 extending in the direction 2X, and the total circumferential length L1 of the upstream plate 81 and the downstream plate 82 is equal to the bottom surface 22a of the single integration recess 22. It is formed longer than the circumferential length L2. The plate 8 has a width that substantially covers the bottom surface 22a of the accumulation recess 22 in the rotation axis direction (2Y direction) of the rotary drum 1, and can cover the entire bottom surface 22a of one accumulation recess 22. It is a size.

  As shown in FIGS. 2, 3 (a) and 3 (b), the upstream plate 81 is a partition closest to the boundary between the duct 4 and the wrapping belt 5 across both the fixing plates 231 and 231. The plate 24a extends from the tip of the plate 24a toward the upstream side in the circumferential direction 2X toward the region covered with the duct 4, that is, toward the region of the negative pressure space A. As shown in FIGS. 2, 3 (a) and 3 (b), the downstream plate 82 is located at the boundary between the duct 4 and the winding belt 5 across the fixed plates 231 and 231. It extends from the front end of the near partition plate 24a toward the downstream side in the circumferential direction 2X toward the region covered with the winding belt 5, that is, toward the region of the atmospheric pressure space B. The upstream plate 81 and the downstream plate 82 are fixed at their roots to the tip of the partition plate 24a by a known fixing means such as a bolt or an adhesive.

  The plate 8 (the upstream plate 81 and the downstream plate 82) is a plate-like plate made of a metal such as stainless steel or aluminum, or a resin, and is a non-breathable member that does not allow air to pass through. 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. The plate 8 may be provided at the tip of each partition plate 24, but it may be provided only at the tip of the partition plate 24 a closest to the boundary between the duct 4 and the winding belt 5.

  In the rotary drum 2, as shown in FIG. 1, the member 20 forming the outer peripheral surface 21 is arranged so as to cover the entire outer periphery of the drum body 23, and receives the power from the prime mover such as a motor, The member 20 forming the surface 21 rotates in the arrow R direction around the horizontal axis. Hereinafter, the member 20 that forms the outer peripheral surface 21 will be described in detail.

  In the fiber stacking apparatus 1A, as shown in FIG. 4, the member 20 forming the outer peripheral surface 21 includes a rigid metal frame body 25 and a porous plate 28 (porous) fixed to the frame body 25 in an overlapping manner. And a pattern forming plate 29 fixed to the outer surface 28a of the porous plate 28 in an overlapping manner.

  As shown in FIG. 4, the frame body 25 has a concave bottom surface corresponding portion 251 that overlaps the bottom surface 22 a in the plan view of the accumulation concave portion 22 at the center in the drum width direction 2Y direction. Here, the “plan view” refers to an object (such as the accumulation concave portion 22) viewed from the outside in the normal direction of the outer peripheral surface of the rotating drum 1 (direction perpendicular to the rotating shaft direction of the rotating drum 1). Means the case. The concave bottom surface corresponding part 251 is a non-position located between a plurality of through holes 252 penetrating the concave bottom surface corresponding part 251 in the thickness direction and two through holes 252 and 252 adjacent in the circumferential direction 2X direction of the rotary drum 2. And a breathable rib 253. By having the through hole 252, the entire bottom surface corresponding to the concave portion 251 has air permeability. The plurality of through holes 252 are intermittently arranged in the circumferential direction of the drum body 3. The non-breathable rib 253 is formed to extend in the drum width direction 2Y between two through holes 252 and 252 adjacent in the circumferential direction 2X. The rib 253 mainly improves the strength of the frame body 25 itself, and at the both ends in the circumferential direction 2X of a polymer on which a porous plate 28 and a pattern forming plate 29 described later are overlapped, for example, a known bolt or adhesive or the like. It becomes a part to be fixed by the fixing means.

  In the following description, the outer surface of each constituent member (porous plate 28 and pattern forming plate 29) of the member 20 that forms the outer peripheral surface 21 is the raw material when the raw material of the absorber in the constituent member is stacked. It is a surface that is directed to the supply side. In addition, the inner surface of each constituent member is a surface directed to the side opposite to the raw material supply side (drum body 23 side) when the raw material of the absorbent body is stacked in the constituent member.

  As the raw material of the absorbent body, various materials conventionally used for absorbent bodies of absorbent articles such as sanitary napkins, panty liners, and disposable diapers can be used without particular limitation. For example, as fiber materials, 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, as a raw material of an absorber, you may use an absorbent particle (absorbent polymer) with a fiber material. Moreover, as a raw material of an absorber, a fibrous water-absorbing polymer can be used alone or with a fiber material. Furthermore, a deodorant, an antibacterial agent, etc. can also be used with a fiber material etc. as needed.

  The pattern forming plate 29 is a member whose outer surface 29 a is positioned on the outermost side of the rotary drum 2 and forms a part of the outer peripheral surface 21, and is also a member that forms the outer peripheral surface of the accumulation recess 22. Here, “the outer peripheral surface of the accumulation recess 22” means an outer surface along the outline of the accumulation recess 22 when the accumulation recess 22 is viewed in plan. The pattern forming plate 29 has an outer surface 29a and an inner surface 29b directed toward the drum body 23, and a space portion having a shape corresponding to the three-dimensional shape in the accumulation recess 22 is formed between the outer surface 29a and the inner surface 29b. Have. Except for this space portion, the pattern forming plate 29 is a non-breathable member that does not allow air to pass through. The “non-breathable” here is as described above. As the pattern forming plate 29, 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. Note that the thickness of the non-breathable member is constant, and is one of the factors that determine the depth of the accumulation recess 22. That is, by reducing the thickness of the non-breathable member, the depth of the accumulation concave portion 22 becomes shallow, and a thin pile 31 can be obtained.

  The porous plate 28 transmits an air flow (vacuum air) generated by driving an intake fan (not shown) connected to the central shaft portion 232 of the drum body 23 to the outside of the apparatus (outside the rotating drum 2). It is an air-permeable plate that holds the raw material of the absorber carried on the air flow without allowing it to permeate and allows only air to permeate. The porous plate 28 is formed with a plurality (a large number) of suction holes (pores) penetrating the plate 28 in the thickness direction with a uniform distribution on the entire plate 28, and the accumulation recess 22 is formed as a rotating drum. While passing through the space maintained at a negative pressure in 2 (space A in the fiber stacking apparatus 1A), the suction hole functions as an air flow permeation hole. As the porous plate 28, 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.

  A non-breathable member 281 is fixed to the outer surface 28a of the porous plate 28 at a position corresponding to the slit 32 provided in the absorbent body manufactured by the fiber stacking apparatus 1A of the present embodiment. Specifically, the three non-breathable members 281 made of synthetic resin are arranged at intervals in the drum width direction 2Y, and are strip-shaped in the drum circumferential direction 2X at positions corresponding to the space portions of the pattern forming plate 29. It is arranged to extend.

  In the fiber stacking apparatus 1 of the present embodiment, as shown in FIG. 4, the member 20 that forms the outer peripheral surface 21 of the rotary drum 2 includes the porous plate 28 and the pattern forming plate 29 configured as described above. The frame body 25 is disposed on each concave bottom surface corresponding portion 251 (through hole 252), and is fixed to the rib 253 by a known fixing means such as a bolt or an adhesive. In the fiber stacking device 1, the rotary drum 2 is formed such that the member 20 that forms the outer peripheral surface 21 formed in this way is arranged so as to cover the outer peripheral edge of the drum main body 23.

  As shown in FIG. 1, the duct 4 extends from a fiber material supply unit 7 to be described later to the rotating drum 2, and the opening A on the downstream side of the duct 4 is maintained at a negative pressure in the space A of the rotating drum 2. The outer peripheral surface 21 located at is covered. In the duct 4, an air flow that causes the raw material of the absorber to flow toward the outer peripheral surface 21 of the rotating drum 2 is generated in the internal space of the duct 4 by the operation of an intake fan (not shown) of the rotating drum 2. Yes. As shown in FIG. 1, a polymer spray tube 41 that supplies absorbent particles (absorbent polymer) that is a raw material of the absorber into the duct 4 is disposed on the top plate of the duct 4.

  As shown in FIGS. 1 and 3A, the winding belt 5 is disposed along the outer peripheral surface 21 adjacent to the downstream side of the position of the duct 4 of the rotating drum 2. It is arranged along the outer peripheral surface 21 located in the space B set to zero pressure (atmospheric pressure) weaker than the space A. The winding belt 5 is an endless, non-breathable belt, is stretched over a roll 51 and a roll 52, and is rotated along with the rotation of the rotary drum 2. Since the piled material in the accumulation recess 22 is pressed by the winding belt 5, the piled material in the accumulation recess 22 is transferred onto the vacuum conveyor 6 even if the pressure in the space B is set to atmospheric pressure. Until then, it can be held in the recess 22 for accumulation.

  As shown in FIG. 1, the vacuum conveyor 6 is disposed below the rotary drum 2, and is disposed on the outer peripheral surface 21 located in the space C set to the positive pressure of the rotary drum 2. The vacuum conveyor 6 is opposed to the endless breathable belt 63 spanned between the drive roll 61 and the driven rolls 62 and 62 and the outer peripheral surface 21 located in the space C of the rotary drum 2 with the breathable belt 63 interposed therebetween. And a vacuum box 64 arranged at the position. On the vacuum conveyor 6, a core wrap sheet 33 made of tissue paper or a liquid permeable nonwoven fabric is introduced.

  The fiber material supply part 7 is a part which supplies the fiber material which is a raw material of an absorber to the duct 4, as shown in FIG. The fiber material supply unit 7 includes a defibrator 71. By introducing the sheet-shaped raw material 30 of the fiber material into the defibrating machine 71, the raw material 30 is defibrated and the defibrated fiber material is supplied to the flow path in the duct 4.

Next, a method for continuously producing an absorbent body using the fiber stacking apparatus 1A described above will be described.
First, the suction fan (not shown) connected to the space A in the rotary drum 2 and the inside of the vacuum box 64 is operated to make negative pressure. By creating a negative pressure in the space A, an air flow (vacuum air) is generated in the duct 4 to convey the raw material of the absorber to the outer peripheral surface 21 of the rotary drum 2. Further, the rotary drum 2 is rotated and the pressing belt 5 is operated.

  Next, the defibrating machine 71 of the fiber material supply unit 7 is operated to defibrate the sheet-shaped raw material 30 of the fiber material that is the raw material of the absorber, and the defibrated fiber material is used as a flow path in the duct 4. Supply (see FIG. 1). In addition, absorbent particles (absorbent polymer), which is a raw material of the absorber, are supplied into the duct 4 by a polymer spray pipe 41 arranged on the top plate of the duct 4.

  And the raw material of the absorber with which the fiber material and the absorbent particle (absorbent polymer) were mixed in the space A area | region in the rotating drum 2 by the duct 4 toward the outer peripheral surface 21 of the rotating drum 2 in a scattering state. (See FIG. 3A). In this way, the absorbent material is stacked in the stacking recess 22 of the outer peripheral surface 21 of the rotary drum 2 to obtain a stacked product 31.

  Next, the rotary drum 2 is further rotated, and conveyed to the vacuum conveyor 6 while pressing the piled material 31 into the accumulation recess 22 by the pressing belt 5. Then, when the pile 31 in the accumulation recess 22 comes to the position opposite to the vacuum box 64, it is released from the accumulation recess 22 by suction from the vacuum box 64, and is introduced onto the vacuum conveyor 6. It is delivered onto a core wrap sheet 33 made of tissue paper or a liquid-permeable nonwoven fabric.

  Here, as described above, as shown in FIG. 3B, in the fiber stacking apparatus 1 </ b> A, the drum body 23 is at the tip of the partition plate 24 a closest to the boundary between the duct 4 and the winding belt 5. A plate 8 extending along the circumferential direction 2X of the rotary drum 2 is provided. The total circumferential length L1 of the upstream plate 81 and the downstream plate 82 constituting the plate 8 is formed to be longer than the circumferential length L2 of the bottom surface 22a of one stacking recess 22. Yes. Accordingly, in the fiber stacking apparatus 1A, when the member 20 forming the outer peripheral surface 21 of the rotary drum 2 is rotating, the porous plate 28 (porous member) of the bottom surface 22a of the accumulation recess 22 of the outer peripheral surface 21 is rotated. ), An air flow is generated from the atmospheric pressure space B of the drum body 23 in the area covered by the winding belt 5 to the negative pressure space A of the drum body 23 in the area covered by the duct 4. It is hard to do. Therefore, it is difficult for disturbance to occur in the pile 31 obtained by stacking the absorbent raw material in the accumulation recess 22 of the rotary drum 2, and the absorber can be manufactured stably.

  In the fiber stacking apparatus 1A of the first embodiment, as shown in FIG. 4, three non-breathable members 281 are provided on the outer surface 28a of the porous plate 28 constituting the member 20 forming the outer peripheral surface 21. Are arranged in a strip shape. Therefore, three slits 32 are formed at positions corresponding to the three air-impermeable members 281 in the pile 31 obtained by releasing from the accumulation recess 22. Therefore, in the fiber stacking apparatus 1A of the first embodiment, the fiber stack 31 obtained by releasing from the stacking recess 22 has a uniform thickness having three slits 32. In spite of the shape of the peculiar pile 31 having such a slit 32, according to the pile device 1A of the first embodiment, the porosity of the bottom surface 22a of the accumulation recess 22 of the outer peripheral surface 21 is as follows. Via the plate 28 (porous member), from the atmospheric pressure space B of the drum body 23 in the region covered with the winding belt 5 to the negative pressure space A of the drum body 23 in the region covered with the duct 4. Since the air flow is less likely to occur, the resulting fiber stack 31 is less likely to be disturbed, and the absorber can be manufactured stably.

  Thereafter, both side portions along the conveying direction of the core wrap sheet 33 are folded back, and the upper and lower surfaces of the piled material 31 are covered with the core wrap sheet 33. Then, the pile 31 in a state covered with the core wrap sheet 33 is cut together with the core wrap sheet 33 by a cutting means of a cutting device (not shown). In this way, an absorbent body in which the core 31 is coated with the piled product 31 is continuously obtained.

  The absorbent fiber stack 31 obtained by using the fiber stacking apparatus 1A can be obtained even if it is a thin product obtained by reducing the thickness of the non-breathable member of the pattern forming plate 29, for example. Disturbances are unlikely to occur in the fine material 31. A thin absorbent body formed using such a piled article 31 has a high quality suitable as an absorbent body used for absorbent articles such as sanitary napkins, incontinence pads, and disposable diapers. In particular, when used in sanitary napkins, it can be expected to improve fit and appearance. Thus, according to the manufacturing method using the fiber stacking apparatus 1A of the first embodiment, the resulting fiber stack 31 is hardly disturbed, and the absorbent body can be manufactured stably.

  Next, the fiber stacking apparatus 1B according to the second embodiment of the present invention will be described. Regarding the fiber-spreading apparatus 1B of the second embodiment, differences from the fiber-spreading apparatus 1A of the first embodiment will be mainly described, and the same points will be denoted by the same reference numerals and description thereof will be omitted. For the points not particularly mentioned, the description relating to the fiber stacking apparatus 1A of the first embodiment is applied as appropriate. Moreover, about the effect of the fiber-spreading apparatus 1B of 2nd Embodiment, a different point from the effect of the fiber-spreading apparatus 1A of 1st Embodiment is demonstrated, The point which is not demonstrated in particular is the same as the effect of the fiber-spreading apparatus 1A. The description of the effect of the fiber stacking apparatus 1A is applied as appropriate.

  As shown in FIG. 5, the fiber stacking apparatus 1 </ b> B of the second embodiment is a region where the partition plate 24 a of the drum body 23 closest to the boundary between the duct 4 and the winding belt 5 is covered with the duct 4, that is, The drum body 23 is disposed in a region located in the negative pressure space A. Since the partition plate 24a is arranged at such a position, the duct 4 is not only in the region located in the negative pressure space A of the drum body 23 but also in the region located in the atmospheric pressure space B of the drum body 23. Some will be covered. Since the duct 4 is a part that supplies the raw material of the absorber in a scattered state toward the outer peripheral surface 21 of the rotary drum 2, a negative pressure is generated from a part of the region located in the atmospheric pressure space B covered by the duct 4. It is difficult for air flow to occur in the space A. Therefore, in the fiber stacking apparatus 1B, when the member 20 forming the outer peripheral surface 21 is rotating, the atmospheric pressure in the region covered with the winding belt 5 through the accumulation concave portion 22 of the outer peripheral surface 21 is increased. The air flow is formed in the negative pressure space A in the region covered with the duct 4 from the space B.

  As described above, the fiber stacking apparatus 1B according to the second embodiment is unlikely to be disturbed in the fiber stack 31 obtained by stacking the absorbent raw material in the accumulation recess 22 of the rotary drum 2, and stably absorbs the absorbent body. Can be manufactured. Therefore, according to the manufacturing method using the fiber stacking apparatus 1B of the second embodiment, the resulting fiber stack 31 is not easily disturbed, and the absorbent body can be manufactured stably.

  The absorbent body manufacturing apparatus of the present invention is not limited to the fiber stacking apparatuses 1A to 1B of the first to second embodiments described above, and can be changed as appropriate. Moreover, each component in the fiber-spreading apparatus 1A-1B of the above-mentioned 1st-2nd embodiment can be implemented in combination suitably in the range which does not impair the meaning of this invention.

  For example, in the fiber stacking apparatuses 1A to 1B of the first to second embodiments, the space B located in the region covered with the winding belt 5 in the drum body 23 is set to atmospheric pressure, but atmospheric pressure The negative pressure may be set to be weaker than the space A located in the area covered by the duct 4.

  In the fiber stacking apparatuses 1A to 1B according to the first and second embodiments, the air-impermeable member 281 is disposed on the outer surface 28a of the porous plate 28 that constitutes the member 20 that forms the outer peripheral surface 21. It does not have to be arranged.

  Moreover, you may change flexibly the shape of the fiber pile 31 manufactured by changing the shape of the recessed part 22 for accumulation, etc.

  In the fiber stacking apparatus 1A according to the first embodiment, the plate 8 provided at the tip of the partition plate 24a includes an upstream plate 81 and a downstream plate 82 as shown in FIG. The total circumferential length L1 of the plate 81 and the downstream plate 82 is formed to be longer than the circumferential length L2 of the bottom surface 22a of one accumulation recess 22, but the plate 8 is located upstream. Only the plate 81 or the downstream plate 82 may be provided. At this time, it is only necessary that the circumferential length of only the upstream plate 81 or the downstream plate 82 is longer than the circumferential length L2 of the bottom surface 22a of the single accumulation recess 22.

  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 following absorber manufacturing apparatus is disclosed regarding the embodiment mentioned above.

<1>
A rotating drum having an accumulation recess for collecting the absorbent material on the outer peripheral surface, a duct for supplying the absorbent raw material in a scattered state toward the outer peripheral surface of the rotary drum, and adjacent to the downstream side of the duct And an absorbent body manufacturing apparatus comprising a winding belt for pressing the piled material of the absorbent body material accumulated in the accumulation recess,
The rotating drum includes a drum main body that does not rotate inward of a member that forms the outer peripheral surface, and the drum main body is partitioned by a partition plate provided from a central axis side of the rotating drum toward the outer peripheral surface side. A plurality of mutually independent spaces,
When the member forming the outer peripheral surface is rotating, the negative region in the region covered with the duct is changed from the space in the region covered with the winding belt through the concave portion for accumulation on the outer peripheral surface. An apparatus for manufacturing an absorbent body in which no air flow is generated in the space of pressure.

<2>
The drum body includes a plate extending along a circumferential direction of the rotating drum at a tip of the partition plate closest to a boundary between the duct and the winding belt,
The plate extends from the tip of the partition plate closest to the boundary to at least one of the upstream side and the downstream side, and the circumferential length thereof is the circumferential length of the bottom surface of the accumulation recess. The manufacturing apparatus of the absorber as described in said <1> longer than this.
<3>
The said 1st partition plate nearest to the boundary of the said duct and the said winding belt is an apparatus for manufacturing the absorber as described in said <1> arrange | positioned in the area | region covered with the said duct.
<4>
The said manufacturing recessed part has the non-suction part extended along the circumferential direction of the said rotating drum in the bottom face, The manufacturing apparatus of the absorber in any one of said <1>-<3> .
<5>
Further, the absorption according to any one of <1> to <4>, further comprising a vacuum conveyor disposed below the rotating drum, and a fiber material supply unit that supplies a raw material of the absorber to the duct. Body manufacturing equipment.
<6>
The vacuum conveyor is disposed below the rotating drum, and any one of <1> to <5> disposed on an outer peripheral surface located in the space C set to a positive pressure of the rotating drum. The absorbent body manufacturing apparatus according to claim 1.
<7>
<1> to <6>, wherein the drum body includes a disk-shaped fixed plate and a columnar central shaft portion that connects the fixed plates at both ends in the width direction of the rotating drum. The absorbent body manufacturing apparatus according to claim 1.
<8>
An air intake fan is connected to the central shaft portion of the drum body, and the pressures of the plurality of independent spaces partitioned in the rotary drum can be adjusted by driving the air intake fan. 7> The absorber manufacturing apparatus according to any one of 7).
<9>
The space A of the rotating drum, the outer peripheral surface of which is located in a region covered with the duct, is configured to be maintained at a negative pressure. Any one of <1> to <8> The manufacturing apparatus of the absorber of description.
<10>
Manufacturing of the absorbent body according to any one of <1> to <9>, wherein the space B located in the region covered with the winding belt in the drum body is set to atmospheric pressure (no pressure). apparatus.
<11>
The space B located in the area covered with the winding belt in the drum body is set to a negative pressure that is weaker than the space A adjacent to the space B and located in the area covered with the duct in the drum body. The manufacturing apparatus of the absorber as described in any one of <1> to <10>.

<12>
The rotating drum has a space A, a space B adjacent to the space A, a space C adjacent to the space B, and a space D arranged between the space C and the space A,
The absorption according to any one of <1> to <11>, wherein spaces C and D arranged in a region where the outer peripheral surface of the rotating drum is directed to the vacuum conveyor side is set to a positive pressure. Body manufacturing equipment.
<13>
The plate of the drum body includes an upstream plate extending along the circumferential direction 2X upstream from the tip of the partition plate, and a downstream side extending along the circumferential direction 2X from the tip of the partition plate to the downstream side. The manufacturing apparatus for an absorbent body according to any one of <1> to <12>, including a plate.
<14>
The said drum main body plate is a manufacturing apparatus of the absorber in any one of said <1>-<13> which has the width | variety which covers the bottom face of the said recessed part for accumulation | stacking in the rotating shaft direction of the said rotating drum.
<15>
The drum body plate (upstream plate and downstream plate) is a plate-like plate made of metal or resin such as stainless steel or aluminum, and is a non-breathable member that does not allow air to pass. <1> The manufacturing apparatus of the absorber as described in any one of-<14>.
<16>
The manufacturing apparatus for an absorbent body according to any one of <1> to <15>, wherein a fiber material is used as a raw material of the absorbent body.
<17>
The manufacturing apparatus for an absorbent body according to any one of <1> to <16>, wherein absorbent particles (absorbent polymer) are used together with a fiber material as a raw material of the absorbent body.
<18>
The member forming the outer peripheral surface of the rotating drum has a porous member and a pattern forming plate fixed to be overlapped on the outer surface side of the porous member,
A non-breathable member is fixed to the outer surface of the porous member,
The plurality of air-impermeable members are arranged at intervals in the drum width direction 2Y, and extend in a belt shape in the drum circumferential direction 2X at positions corresponding to the space portions of the pattern forming plate. The manufacturing apparatus of the absorber as described in any one of 1> to <17>.
<19>
The apparatus for manufacturing an absorbent body according to any one of <1> to <18>, wherein a member that forms an outer peripheral surface of the rotating drum is disposed so as to cover an entire outer periphery of the drum body.
<20>
The members forming the outer peripheral surface of the rotary drum are a metal frame body having rigidity, a porous plate (porous member) fixed to the frame body, and an outer surface side of the porous plate. The manufacturing apparatus of the absorber as described in any one of the above items <1> to <19>, which has a pattern forming plate fixed to the surface.

<21>
The winding belt is an endless, non-breathable belt, spanned between a first roll and a second roll, and rotated with the rotation of the rotating drum. <20> The absorber production apparatus according to any one of <20>.
<22>
The manufacturing apparatus of the absorbent body according to any one of <1> to <21>, wherein the stacked article is formed with a plurality of slits at positions corresponding to the plurality of air-impermeable members.
<23>
The manufacturing method of the absorber using the manufacturing apparatus of the absorber in any one of said <1>-<22>.
<24>
The said absorber is a manufacturing method of the absorber as described in said <23> which is an absorber of an absorbent article.
<25>
The absorbent article manufacturing method according to <24>, wherein the absorbent article is mainly used for absorbing and holding bodily fluids excreted from the body such as urine and menstrual blood.
<26>
The absorbent article manufacturing method according to <24> or <25>, wherein the absorbent article is a disposable diaper, a sanitary napkin, an incontinence pad, or a panty liner.

DESCRIPTION OF SYMBOLS 1A-1B Fiber stacking apparatus 2 Rotating drum 21 Outer peripheral surface 22 Concave part 23 Accumulation drum body 24 Partition plate 25 Frame body 28 Porous plate (porous member)
29 pattern forming plate 30 sheet-like raw material of fiber material 31 piled fabric 32 slit 33 core wrap sheet 4 duct 41 polymer spray tube 5 winding belt 51,52 roll 6 vacuum conveyor 61 drive roll 62 driven roll 63 breathable belt 64 Vacuum Box 7 Textile Material Supply Unit 71 Defibration Machine

Claims (5)

A rotating drum having an accumulation recess for collecting the absorbent material on the outer peripheral surface, a duct for supplying the absorbent raw material in a scattered state toward the outer peripheral surface of the rotary drum, and adjacent to the downstream side of the duct And an absorbent body manufacturing apparatus comprising a winding belt for pressing the piled material of the absorbent body material accumulated in the accumulation recess,
The rotating drum includes a drum main body that does not rotate inward of a member that forms the outer peripheral surface, and the drum main body is partitioned by a partition plate provided from a central axis side of the rotating drum toward the outer peripheral surface side. A plurality of mutually independent spaces,
When the member forming the outer peripheral surface is rotating, the negative region in the region covered with the duct is changed from the space in the region covered with the winding belt through the concave portion for accumulation on the outer peripheral surface. An apparatus for manufacturing an absorbent body in which no air flow is generated in the space of pressure. The drum body includes a plate extending along a circumferential direction of the rotating drum at a tip of the partition plate closest to a boundary between the duct and the winding belt,
The plate extends from the tip of the partition plate closest to the boundary to at least one of the upstream side and the downstream side, and the circumferential length thereof is the circumferential length of the bottom surface of the accumulation recess. The manufacturing apparatus of the absorber of Claim 1 longer than length.   2. The absorber manufacturing apparatus according to claim 1, wherein the partition plate that is closest to a boundary between the duct and the winding belt is disposed in a region covered with the duct.   The absorbent manufacturing apparatus according to any one of claims 1 to 3, wherein the accumulation concave portion has a non-suction portion extending along a circumferential direction of the rotating drum on a bottom surface thereof.   The manufacturing method of the absorber using the manufacturing apparatus of the absorber of any one of Claims 1-4.

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