WO2014080813A1

WO2014080813A1 - Manufacturing device for absorber of absorbent article, and manufacturing method

Info

Publication number: WO2014080813A1
Application number: PCT/JP2013/080642
Authority: WO
Inventors: 石川　雅彦
Original assignee: ユニ・チャーム株式会社
Priority date: 2012-11-22
Filing date: 2013-11-13
Publication date: 2014-05-30
Also published as: TW201436773A; TWI590812B; CN104812347B; JP5723859B2; CN104812347A; JP2014100440A

Abstract

A device for manufacturing an absorber (1) having a first basis weight portion (1L) in which a liquid-absorbent material (2) is deposited at a first basis weight, and a second basis weight portion (1H) in which the liquid-absorbent material (2) is deposited at a basis weight greater than the first basis weight. The present invention has: a suction deposition device (11) for producing a continuous body (1r) of an absorber that is continuous in a prescribed direction by suctioning in air via a plurality of intake holes (21h) in an intake surface (21a) and thereby suctioning in and depositing the liquid-absorbent material (2) onto the intake surface (21a); and a cutting device (61) for producing the absorber (1) by cutting the continuous body (1r) of the absorber at boundaries (21BL) of the absorbent material (1) that are set on the continuous body (1r) of the absorber at intervals along the prescribed direction. The intake surface (21a) has a first suctioning region (AL) in which the intake holes (21h) are formed at a first ratio, and a second intake region (AH) in which the intake holes (21h) are formed at a second ratio higher than the first ratio. The second absorbent region (AH) includes the boundaries (21BL).

Description

Absorbent body manufacturing apparatus and manufacturing method for absorbent article

The present invention relates to an absorbent body manufacturing apparatus and manufacturing method for absorbent articles such as disposable diapers.

Disposable diapers, sanitary napkins and the like are used as examples of absorbent articles that absorb excreted fluid such as urine and menstrual blood. These absorbent articles are formed by molding a liquid absorbent material 2 such as pulp fiber or granular superabsorbent polymer (hereinafter also referred to as SAP) into a single sheet as a member that absorbs excretory fluid. It has a body 1.

As shown in the schematic longitudinal sectional view of FIG. 1A, the single-sheet absorbent body 1 is generated by the fiber stacking device 110 in the production line. The fiber stacking device 110 includes a rotating drum 120, and a plurality of planar recesses 121, 121,... Corresponding to the planar shape of the absorber 1 are discretely arranged in the circumferential direction Dc on the outer peripheral surface 120a of the rotating drum 120. A plurality of

intake ports

121h, 121h,... Are provided on the bottom surface 121a of each recess 121, respectively. Further, a spray duct 131 is provided at a predetermined position in the circumferential direction Dc so as to face the outer peripheral surface 120a of the rotary drum 120, and pulp fibers and SAP are scattered from the spray duct 131 toward the outer peripheral surface 120a. The liquid absorbent material 2 such as is supplied.
Therefore, when the recesses 121, 121... Pass through the position of the spray duct 131, the liquid absorbent material 2 is sucked and deposited on the bottom surface 121 a of the recesses 121 by the intake air from the

intake ports

121 h, 121 h. In a predetermined position downstream of the circumferential direction Dc, the liquid absorbent material 2 formed into a single sheet is taken out from the recess 121, and a single sheet-shaped absorber is formed. 1 is generated.

In Patent Document 1, as an improved technique related to the fiber stacking device 110, a plurality of regions having different depths are provided on the bottom surface 121a of the recess 121, whereby the basis weight (g / m ² ) of the absorbent body 1 is set. It is disclosed that it is partially different. And according to this technique, the amount of liquid absorption can be varied according to each part of the absorber 1, and the freedom degree of product design can be improved.

JP 2000-234255 A

However, in this case, since the depth of the concave portion 121 differs depending on each region, the thickness of the absorbent body 1 is partially different in addition to the basis weight. And when the thickness of the absorber 1 is partially different, when the liquid absorbent material 2 is taken out as the absorber 1 from the recess 121 of the rotating drum 120, the absorber 1 is collapsed, and the stability of the take-out There is a problem.

For example, in general, when the absorbent body 1 is taken out from the concave portion 121 of the outer peripheral surface 120a of the rotating drum 120 and transported to the lower process, the flat surface 42a of the endless belt 42 of the belt conveyor 41 moving in the transport direction or the nonwoven fabric or the like The absorbent body 1 is transferred to the same surface 42a with the flat surface of the sheet-like member as the transfer surface 42a. However, in the above-described configuration, the transfer surface 42a and the surface 1s of the absorber 1 are transferred during transfer. The distance between them varies depending on each part of the absorber 1. That is, if the depth is partially different in the recess 121 as described above, the surface 1s of the absorbent body 1 to be brought into contact with the transport surface 42a also has unevenness due to the influence, and as a result, Due to the unevenness factor, the distance between the conveyance surface 42 a and the surface 1 s of the absorber 1 varies depending on each part of the absorber 1. Then, in a portion where the distance is large, the absorber 1 may be collapsed by being pulled by the transport surface 42a. On the other hand, in a portion where the distance is small, there is a possibility that wrinkles are generated due to being compressed by the transport surface 42a.

Alternatively, if the depth of the recess 121 is partially different, a phenomenon different from the above may occur. That is, even if the surface 1 s of the absorbent body 1 is not uneven, the thickness may vary depending on each part of the absorbent body 1. A difference in rigidity is caused due to the difference in thickness. Then, due to the rigidity difference, when the absorbent body 1 is transferred from the curved surface that is the outer peripheral surface 120a of the rotary drum 120 to the flat surface that is the surface 42a of the endless belt 42, wrinkles may occur in the absorbent body 1. Alternatively, the transfer may become unstable due to a speed difference between the surface of the absorbent body 1 on the belt conveyor 41 side and the surface of the absorbent body 1 on the rotating drum 120 side caused by the difference in thickness. There is a risk that productivity will be reduced.

On the other hand, in the method of forming the absorbent body 1 for each recess 121 before the problem of the above-mentioned Patent Document 1, as shown in the enlarged top view of the rotating drum 120 in FIG. The SAP is likely to be unevenly distributed at the upstream end 1eu, and the absorber 1 may collapse upon transfer due to this uneven distribution factor. That is, since SAP has a higher specific gravity than pulp fiber, it is easily affected by inertial force. As a result, SAP is located in the recess 121 on the upstream side in the direction opposite to the rotation direction of the rotary drum 120 based on this inertial force. And then hits the wall 121w on the upstream side of the recess 121 and stops. Therefore, the SAP is unevenly distributed in the upstream end 1eu of the absorber 12, and the absorber 1 is liable to collapse at the end 1eu when it is taken out from the recess 121.

Here, as a method for solving this SAP uneven distribution problem, the following method can be considered. First, instead of the rotating drum 120 in which the plurality of concave portions 121, 121,... Are discretely provided, a rotating drum 20 in which an endless groove portion 21 is provided over the entire circumference of the outer peripheral surface 20a is prepared ( For example, see FIG. Then, the liquid absorbent material 2 is sucked and deposited in the groove portion 21 and the continuous deposit 2 is taken out from the groove portion 21 to generate a continuous body 1r of the absorbent body. By cutting the continuous body 1r, a single-sheet absorbent body 1 is obtained. According to this method, since the groove portion 21 does not have any upstream wall surface 121w that existed in the case of the above-described concave portion 121, the above-described problem of uneven SAP distribution is surely solved, and the result is as follows. Moreover, the collapse at the time of transfer to the conveyance surface 42a is also effectively suppressed.

However, since the absorbent continuous body 1r formed by sucking and depositing the liquid absorbent material 2 such as pulp fiber and SAP is bulky and low in rigidity, it is difficult to apply pressure when cutting, and the cutting ability is low. Is not good. And the fall of this cutting property exists in the tendency which becomes evident, so that the basic weight of the continuous body 1r of an absorber is small.

The present invention has been made in view of the conventional problems as described above, and an object of the present invention is to improve the cutting property when the absorbent body is cut from the continuous body of the absorbent body.

The main invention for achieving the above object is:
An apparatus for manufacturing an absorbent body having a first basis weight portion where a liquid absorbent material is deposited at a first basis weight and a second basis weight portion deposited at a basis weight higher than the first basis weight. ,
A suction deposition apparatus for generating a continuous body of absorbent bodies continuous in a predetermined direction by sucking and depositing the liquid absorbent material on the suction surface by sucking air from a plurality of suction ports of the suction surface;
A cutting device that generates the absorber by cutting the absorber continuum at a boundary position of the absorber set on the absorber continuum with an interval in the predetermined direction. And
The suction surface has a first suction region in which the intake port is formed with a first aperture ratio and a second suction region in which the intake port is formed with a second aperture ratio higher than the first aperture ratio. And
The manufacturing apparatus of an absorbent body according to an absorbent article, wherein the boundary position is included in the second suction region.
Also,
A method for producing an absorbent body having a first basis weight portion deposited with a first basis weight and a second basis weight portion deposited with a basis weight higher than the first basis weight. ,
Generating a continuous body of absorbent bodies continuous in a predetermined direction by sucking and depositing the liquid absorbent material on the suction surface by sucking air from a plurality of suction ports of the suction surface;
Generating the absorber by cutting the continuum of the absorber at a boundary position of the absorber set on the continuum of the absorber with an interval in the predetermined direction. ,
The suction surface has a first suction region in which the intake port is formed with a first aperture ratio and a second suction region in which the intake port is formed with a second aperture ratio higher than the first aperture ratio. And
The manufacturing method of an absorbent body according to an absorbent article, wherein the boundary position is included in the second suction region.
Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

According to the present invention, it is possible to improve the cutting property when the absorbent body is cut from the continuous body of the absorbent body.

1A is a schematic longitudinal sectional view of a conventional fiber stacking apparatus 110, and FIG. 1B is an enlarged top view of a rotary drum 120 according to the fiber stacking apparatus 110. FIG. FIG. 2A is a schematic plan view of the absorbent body 1 manufactured by the manufacturing apparatus 10 of the first embodiment, and FIG. 2B is an image diagram of the basis weight distribution at the center position in the width direction of the absorbent body 1. It is a schematic longitudinal cross-sectional view of the manufacturing apparatus 10 of 1st Embodiment. 3 is a development view of an outer peripheral surface 20a of the rotary drum 20. FIG. It is a partially enlarged view of the outer peripheral surface 20a of the rotary drum 20 showing an intake port distribution pattern set on the unit bottom surface 21ua of the unit groove portion 21u. It is a schematic perspective view of the cylindrical member 20p which removes and shows some division members 20pd and 20pd. FIG. 5 is a schematic perspective view showing the divided member 20pd further disassembled into three types of parts 20pd1, 20pd2, and 20pd3. It is a schematic longitudinal cross-sectional view of the manufacturing apparatus 10a of 2nd Embodiment.

At least the following matters will become apparent from the description of the present specification and the accompanying drawings.
An apparatus for manufacturing an absorbent body having a first basis weight portion where a liquid absorbent material is deposited at a first basis weight and a second basis weight portion deposited at a basis weight higher than the first basis weight. ,
A suction deposition apparatus for generating a continuous body of absorbent bodies continuous in a predetermined direction by sucking and depositing the liquid absorbent material on the suction surface by sucking air from a plurality of suction ports of the suction surface;
A cutting device that generates the absorber by cutting the absorber continuum at a boundary position of the absorber set on the absorber continuum with an interval in the predetermined direction. And
The suction surface has a first suction region in which the intake port is formed with a first aperture ratio and a second suction region in which the intake port is formed with a second aperture ratio higher than the first aperture ratio. And
The manufacturing apparatus of an absorbent body according to an absorbent article, wherein the boundary position is included in the second suction region.

According to the manufacturing apparatus of an absorbent body relating to such an absorbent article, the absorbent body is generated by cutting the continuous body of the absorbent body at the above boundary position. The suction port is included in the second suction region in which the air inlet is formed with a high aperture ratio, and the liquid absorbing material is sucked and deposited at a high basis weight in the second suction region. Therefore, the boundary position can be included in the high basis weight portion of the continuum of the absorbent body, and as a result, the continuum can be cut with high cutting ability.

An apparatus for manufacturing such an absorber,
The suction deposition apparatus includes:
A rotating drum that continuously rotates in one direction along the circumferential direction;
An endless groove formed on the outer peripheral surface of the rotating drum over the entire circumference, and the groove that sucks and deposits the liquid absorbent material using the bottom surface as the suction surface;
A spraying duct disposed at a first predetermined position in the circumferential direction and spraying and supplying the liquid absorbent material toward the outer peripheral surface of the rotating drum;
A take-out transport device that is disposed at the second predetermined position in the circumferential direction and receives and transports the liquid absorbent material sucked and deposited in the groove as a continuous body of the absorber from the groove while being transported from the groove. And having
The depth of the groove is preferably constant over the entire length in the width direction of the groove and the entire length in the circumferential direction.

According to the absorbent body manufacturing apparatus according to such an absorbent article, the depth of the groove is constant over the entire bottom surface of the groove. Therefore, the thickness of the continuous body of the absorber can be made substantially constant over the entire length in the longitudinal direction and the entire width in the width direction of the continuous body. As a result, the continuous body of the absorber can be removed from the groove portion of the rotating drum. Also when taking out and making it receive on the conveyance surface of an extraction conveyance apparatus, the distance with a conveyance surface can be kept substantially constant over the full length and full width of the continuous body of an absorber. Therefore, it is possible to stably transfer to the conveyance surface while suppressing the collapse of the continuous body of the absorber.

An apparatus for manufacturing such an absorber,
The number of intake ports formed per unit area in the second suction region is set to be greater than the number of intake ports formed per unit area in the first suction region.
It is desirable that the opening area and the opening shape of the intake port have the same specifications between the first low suction region and the second suction region.

According to the absorbent body manufacturing apparatus relating to such an absorbent article, the opening area of the intake port and the opening specification as the opening shape are of one type. Therefore, it becomes easy to find an opening specification that effectively restricts the passage of the liquid absorbent material while suppressing clogging by the liquid absorbent material, and as a result, the intake port can be easily designed.

An apparatus for manufacturing such an absorber,
The rotating drum has a cylindrical member that becomes the outer peripheral surface of the rotating drum,
The cylindrical member has a plurality of divided members divided in the circumferential direction in units corresponding to the absorber,
Each of the dividing members has a unit groove portion corresponding to the groove portion, and the unit groove portions adjacent in the circumferential direction are continuous by arranging a plurality of the dividing members while being adjacent to each other in the circumferential direction. Is desirable.

According to the absorbent body manufacturing apparatus relating to such an absorbent article, when the divided members are arranged adjacent to each other in the circumferential direction, an outer peripheral surface having an endless groove is formed as the outer peripheral surface of the rotating drum. Therefore, a rotating drum having such an outer peripheral surface can be manufactured at low cost.

An apparatus for manufacturing such an absorber,
It is desirable that the second suction region is continuous so as to straddle the boundary position between the unit groove portions adjacent in the circumferential direction.

According to the absorbent body manufacturing apparatus according to such an absorbent article, the second suction region is continuous so as to straddle the boundary position between the unit groove portions. Therefore, it is possible to reliably build a high basis weight portion at the boundary position of the absorber in the continuous body of the absorber.

An apparatus for manufacturing such an absorber,
The take-out and transport device includes an endless belt that rotates around the outer peripheral surface of the rotating drum so as to face the outer peripheral surface as the transport surface, and suction that generates suction force on the outer peripheral surface of the endless belt. It is desirable to have a force generation mechanism.

According to the absorbent body manufacturing apparatus according to such an absorbent article, a suction force is generated on the outer peripheral surface of the endless belt. Therefore, the continuous body of the absorber in the groove portion of the rotating drum can be smoothly transferred to the outer peripheral surface of the endless belt.

An apparatus for manufacturing such an absorber,
Having a clamping device for clamping the absorber continuum in the thickness direction of the absorber continuum;
It is desirable that the continuous body of the absorber clamped by the clamping device is conveyed to the cutting device.

According to the absorbent body manufacturing apparatus according to such an absorbent article, the continuous body is pressed in the thickness direction by the pressing device before the continuous body of the absorbent body is cut. The body as a whole is placed in a dense and tight state. Therefore, it is possible to effectively prevent the continuum of the absorbent body from being broken or torn off during cutting. In addition, since the surface of the continuum is also tightened, it is possible to effectively prevent the liquid absorbent material on the surface from being peeled off or adhering to the cutting device during cutting. It is possible to effectively prevent degradation of the cutting property.

Also,
A method for producing an absorbent body having a first basis weight portion deposited with a first basis weight and a second basis weight portion deposited with a basis weight higher than the first basis weight. ,
Generating a continuous body of absorbent bodies continuous in a predetermined direction by sucking and depositing the liquid absorbent material on the suction surface by sucking air from a plurality of suction ports of the suction surface;
Generating the absorber by cutting the continuum of the absorber at a boundary position of the absorber set on the continuum of the absorber with an interval in the predetermined direction. ,
The suction surface has a first suction region in which the intake port is formed with a first aperture ratio and a second suction region in which the intake port is formed with a second aperture ratio higher than the first aperture ratio. And
The manufacturing method of an absorbent body according to an absorbent article, wherein the boundary position is included in the second suction region.

According to the method of manufacturing an absorbent body according to such an absorbent article, the absorbent body is generated by cutting the continuous body of the absorbent body at the above boundary position. The suction port is included in the second suction region in which the air inlet is formed with a high aperture ratio, and the liquid absorbing material is sucked and deposited at a high basis weight in the second suction region. Therefore, the boundary position can be included in the high basis weight portion of the continuum of the absorbent body, and as a result, the continuum can be cut with high cutting ability.

=== First Embodiment ===
FIG. 2A is a schematic plan view of the absorbent body 1 manufactured by the manufacturing apparatus 10 of the first embodiment. FIG. 2B is an image diagram of the basis weight distribution at the center position in the width direction of the absorbent body 1.

The absorbent body 1 is a part of an absorbent article such as a disposable diaper or a sanitary napkin, and has a function of absorbing excretory fluid such as urine and menstrual blood. Therefore, the absorbent body 1 has pulp fibers and SAP as the liquid absorbent material 2. The absorbent body 1 has a longitudinal direction, a width direction, and a thickness direction as three directions orthogonal to each other. In the example of FIG. 2A, the outer shape on the plane defined by both the longitudinal direction and the width direction has a substantially hourglass shape in which the portion corresponding to the crotch portion 1c is bound in the width direction. However, the outer shape is not limited to this, and may be, for example, a substantially rectangular shape.

The absorbent body 1 is formed by depositing the liquid absorbent material 2 in the thickness direction based on an appropriate basis weight distribution pattern. In this example, the basis weight distribution pattern is a basis weight target value (g / m ² ) has three values. That is, the absorber 1 has a low basis weight portion 1L (corresponding to the first basis weight portion) deposited at a low basis weight target value and a high basis weight deposited at a basis weight target value higher than the low basis weight target value. A weight portion 1H (corresponding to a second basis weight portion) and a medium basis weight portion 1M deposited with a medium basis weight target value between a low basis weight target value and a high basis weight target value. ing. And the low basic weight part 1L is set to the back part 1b except the edge part 1be of the longitudinal direction of the absorber 1, and the high basic weight part 1H is a part of crotch part 1c fundamentally. The crotch part 1c and the ventral part 1a are set.

However, the latter high basis weight portion 1H is also set in a thin strip shape along the width direction at the end portion 1be in the longitudinal direction of the back portion 1b. Therefore, in this basic weight distribution pattern, the high basic weight part 1H is set to the both ends 1ae and 1be of the longitudinal direction of the absorber 1, respectively. This is greatly related to improving the cutting property when cutting and producing the single-sheet absorber 1 from the continuous body 1r of the absorber, which will be described later.

In addition, about the medium basic weight part 1M, it is set to the part near the back side in the crotch part 1c, and the part of the both sides of the width direction. And the situation where the said basic weight becomes substantially higher than a basic weight target value because the said part is restrict | squeezed at the time of mounting | wearing of a diaper by this is avoided effectively.

Moreover, as shown to FIG. 2B, in the vicinity part of the boundary of mutually adjacent parts among the three of said high basic weight part 1H, low basic weight part 1L, and medium basic weight part 1M, respectively, There is a basis weight transition portion 1B in which the basis weight gradually changes from the basis weight of the portion to the basis weight of the other portion. That is, the absorber 1 is generated by sucking and depositing the liquid absorbent material 2 as will be described later, and therefore, as shown in FIG. 2B, the basis weight from the low basis weight portion 1L to the high basis weight portion 1H. The change in quantity becomes incremental. Therefore, the basis weight does not change stepwise at the adjacent boundaries between the

portions

1L, 1M, and 1H having different basis weight target values.

FIG. 3 is a schematic longitudinal sectional view of the manufacturing apparatus 10 for the absorbent body 1. The manufacturing apparatus 10 includes a suction deposition apparatus 11 and a cutting apparatus 61. The suction deposition apparatus 11 has a suction surface 21a. A plurality of

intake ports

21h, 21h,... Are formed on the suction surface 21a. Therefore, the continuum 1r of the absorber that is continuous in a predetermined direction is generated by sucking and depositing the liquid absorbent material 2 on the suction surface 21a by sucking air from the suction ports 21h. And the produced | generated continuous body 1r of the absorber is taken out from the suction surface 21a, and is conveyed to the cutting device 61. FIG. The cutting device 61 generates the single-sheet absorber 1 by cutting the conveyed absorber continuum 1r at the boundary position 1BL of the absorber 1 set on the continuum 1r. . Hereinafter, the suction deposition apparatus 11 and the cutting apparatus 61 will be described.

<<< Suction deposition apparatus 11 >>>
The suction deposition apparatus 11 has a cylindrical rotating drum 20 as a main body. The rotary drum 20 continuously rotates in one direction of the circumferential direction Dc (clockwise in FIG. 3) with the cylinder axis C20 as a rotation center. Further, an endless groove portion 21 is formed on the outer peripheral surface 20a of the rotary drum 20 over the entire circumference. And the bottom face 21a of this groove part 21 functions as the above-mentioned suction surface 21a. That is, a plurality of

intake ports

21h, 21h,... Are formed on the bottom surface 21a of the groove portion 21. The

intake ports

21h, 21h,... Perform an intake operation when the liquid absorbent material 2 is deposited in the groove portion 21. However, when the liquid absorbent member 2 deposited in the groove portion 21 is taken out from the groove portion 21 as the absorber continuous body 1r, a squirting operation for injecting air from the air inlet 21h is performed. The intake operation and the squirt operation are realized as follows.

First, the space in the groove portion 21 communicates with the inner circumferential space S of the rotary drum 20 through the intake ports 21h so as to allow ventilation. A cylindrical partition wall 22a is provided in the inner circumferential space S of the rotating drum 20 so as to be concentric with the rotating drum 20, so that a donut-shaped substantially closed space Sd is formed on the inner circumferential side of the rotating drum 20. Is partitioned. Further, the substantially closed space Sd is divided into zones in the circumferential direction Dc by a plurality of partition walls 22b. For example, the first zone Z1 shown in FIG. 3 is maintained in a negative pressure state lower than the external pressure. The second zone Z2 on the downstream side is maintained at a pressure slightly higher than the external pressure. Therefore, when the intake port passes through the first zone Z1, the intake port performs an intake operation, but when passing through the second zone Z2, an injection operation is performed.

As shown in FIG. 3, a spray duct 31 is provided at a position corresponding to the first zone Z1 in the circumferential direction Dc (corresponding to a first predetermined position) so as to face the outer peripheral surface 20a of the rotary drum 20. Then, pulp fibers and SAP are supplied as the liquid absorbent material 2 in a scattered state from the mouth portion 31a of the spray duct 31 toward the outer peripheral surface 20a. Further, a suction belt conveyor 41 (corresponding to a removal transport mechanism) is arranged at a position corresponding to the second zone Z2 in the circumferential direction Dc (corresponding to a second predetermined position).

Therefore, when the air inlet 21h of the groove 21 of the rotary drum 20 passes through the position of the spray duct 31, the air inlet 21h performs an air intake operation, so that the liquid absorbent material 2 is sucked into the bottom surface 21a of the groove 21. Thus, the deposit 2r of the liquid absorbent material 2 continuous along the circumferential direction Dc is formed.

Further, when the intake port 21h passes through the position of the second zone Z2 on the downstream side in the circumferential direction Dc, the intake port 21h performs a squirt operation, so that the deposit 2r from the groove portion 21 is a continuous body of the absorber. It is taken out as 1r, and is sucked and delivered to the suction belt conveyor 41 arranged facing the second zone Z2. Then, it is conveyed to the cutting device 61 by the suction belt conveyor 41.

The suction belt conveyor 41 is a known conveyor 41 that can generate a suction force on the transport surface 42a. That is, the conveyor 41 is arranged such that the outer peripheral surface 20a of the rotary drum 20 is opposed to the outer peripheral surface 42a as the conveying surface 42a, and the endless belt 42 rotates around the drive, and the outer peripheral surface 42a of the endless belt 42 has a suction force. A suction force generating mechanism 45 that generates

Here, the driving circulation of the endless belt 42 is realized as follows, for example. First, the endless belt 42 is passed over a plurality of

appropriate rollers

44, 44, and at least one of the

rollers

44, 44 is driven and rotated by a servo motor (not shown) as a drive source. As a result, the driving force is obtained from the driving roller 44 and the endless belt 42 is driven around.

Further, the suction force generating mechanism 45 is realized as follows, for example. First, as the endless belt 42 described above, an endless belt 42 having a plurality of through holes (not shown) along the thickness direction is used, and further, the endless belt 42 is opposed to the second zone Z2 through the endless belt 42. A suction box 45b having an opening 45bh is disposed. Then, air is sucked into the through hole of the endless belt 42 by sucking air from the air intake opening 45bh, thereby generating a suction force on the outer peripheral surface 42a of the endless belt 42 which is the conveying surface 42a.

4 shows a developed view of the outer peripheral surface 20a of the rotating drum 20. The overall length dimension in the circumferential direction Dc of the bottom surface 21a of the groove portion 21 of the rotating drum 20 is generally an integral multiple of the overall length dimension in the longitudinal direction of the absorber 1. (For example, 6 times in FIG. 4). That is, when the concave portion in the planar shape of the absorber 1 on the outer peripheral surface 20a of the rotating drum 20 is defined as the unit groove portion 21u, the unit groove portion 21u communicates with the unit groove portions 21u adjacent to each other in the circumferential direction Dc. The above-described groove portions 21 are arranged in the circumferential direction with a number corresponding to the above integer multiple (for example, six in FIG. 4). Therefore, each unit bottom surface 21ua has a plurality of air inlets 21h, so that the absorber 1 can be deposited on the unit bottom surface 21ua, which is the bottom surface 21ua of each unit groove 21u, with the basis weight distribution pattern of FIG. 2A described above. 21h... Are formed in a predetermined inlet distribution pattern.

FIG. 5 is a partially enlarged view of the outer peripheral surface 20a of the rotary drum 20 showing an intake port distribution pattern set on the unit bottom surface 21ua. As shown in FIG. 5, the unit bottom surface 21ua has a low opening area (corresponding to the first opening area) and a low suction area AL (corresponding to the first suction area) in which the

intake ports

21h, 21h, ... are formed. Between the high suction area AH (corresponding to the second suction area) in which the

intake ports

21h, 21h,... Are formed with an opening ratio higher than the opening ratio (corresponding to the second opening ratio), and a low opening ratio and a high opening ratio. And a medium suction area AM in which

intake ports

21h, 21h... Are formed with a medium aperture ratio.
Based on the difference in aperture ratio, the

basis weight portions

1L, 1M, and 1H having different basis weight target values as described above are deposited and formed in the areas AL, AM, and AH. For example, in the high suction region AH, the liquid absorbent material 2 is deposited with a high basis weight based on the high aperture ratio, and thereby, the high basis weight portion 1H is mainly formed. Moreover, in the low suction area | region AL, the liquid absorbent material 2 accumulates with a low basic weight based on the low opening ratio, and, thereby, the low basic weight part 1L is mainly formed. Further, in the medium suction area AM, the liquid absorbent material 2 is deposited with a medium basis weight based on a medium opening ratio, and thereby, a medium basis weight portion 1M is mainly formed. Incidentally, the “aperture ratio” referred to here is a ratio of the area of all the

intake ports

21h, 21h... Occupying the area for calculation of the aperture ratio (including the opening area of the

intake ports

21h, 21h... Formed in the area). That is.

Here, in the manufacturing apparatus 10 according to the first embodiment, as shown in FIG. 5, in order to form the high

basis weight portions

1H and 1H at the longitudinal ends 1ae and 1be of the absorbent body 1 as shown in FIG. High suction areas AH and AH are set at both ends of the unit bottom surface 21 ua in the circumferential direction Dc, respectively. Specifically, the high suction region AH is set to extend from the substantially central portion at the downstream end of the unit bottom surface 21 ua in the circumferential direction Dc, but at the upstream end of the circumferential direction Dc. In addition, the high suction region AH is set in a thin strip shape along the width direction of the groove portion 21. Therefore, the unit bottom surfaces 21ua and 21ua adjacent to each other in the circumferential direction Dc are connected to each other in the circumferential direction Dc between the high suction areas AH and AH, respectively. And since the boundary position 21BL between the unit bottom surfaces 21ua and 21ua, that is, the boundary position 21BL between the

unit groove portions

21u and 21u is synonymous with the boundary position 1BL between the

absorbers

1 and 1, according to the pattern arrangement described above, The boundary position 1BL between the

absorbers

1 and 1 virtually set on the absorber continuous body 1r is included in the high suction region AH. Therefore, when the cutting device 61 described later cuts the absorbent body 1r by cutting the absorbent body 1r at the boundary position 1BL, the high basis weight portion 1H is cut, and as a result, Good cutting performance is ensured.

Here, desirably, the depth of the groove portion 21 is preferably constant over the entire length in the width direction of the groove portion 21 and the entire length in the circumferential direction Dc. And if it becomes like this, the thickness of the continuous body 1r of an absorber can be shape | molded substantially uniformly over the full length of the longitudinal direction of the continuous body 1r, and the full width of the width direction, As a result, When the absorbent continuum 1r is taken out from the groove 21 of the rotary drum 20 and is received by the outer peripheral surface 42a of the endless belt 42, which is the conveying surface 42a of the suction belt conveyor 41, the full length and the full width of the absorbent continuum 1r are obtained. The distance from the transport surface 42a can be kept substantially constant. Therefore, it is possible to stably transfer to the outer peripheral surface 42a of the endless belt 42 while effectively suppressing the collapse of the absorbent continuous body 1r.

Incidentally, the stability of the above-described transfer operation is more likely to be impaired as the thickness of the absorber continuous body 1r is thinner. This is because, in general, the distance between the outer peripheral surface 42a of the endless belt 42, which is the conveying surface 42a, and the outer peripheral surface 20a of the rotary drum 20 is in the range of 1 to 2 mm regardless of the thickness of the absorbent continuous body 1r. This is because the distance required for the transfer increases as the thickness decreases, since the constant value is maintained. On the other hand, recently, thin absorbent articles are becoming mainstream, and accordingly, the absorbent body 1 is also becoming thinner. Therefore, in the future, improvement in the stability of the transfer operation described above may become a more important issue. However, if the depth of the groove 21 is constant as described above, the depth of the groove 21 is improved. In comparison with the case where the is not constant, the stability of the transfer operation can be improved. That is, if the depth of the groove portion 21 is made constant, the recent needs for thinning can be met.

Desirably, when setting the aperture ratios of the

intake ports

21h, 21h... Corresponding to the low suction area AL, the middle suction area AM, and the high suction area AH, the areas AL, AM, The aperture ratio may be adjusted by the number of

inlets

21h, 21h,... Per unit area formed in the AH (number / m ² ). For example, as shown in FIG. 5, the number of formation in the middle suction area AM (number / m ² ) is larger than that in the low suction area AL, and the number of formation in the higher suction area AH than in the middle suction area AM ( It is preferable to adjust the aperture ratio corresponding to each of the areas AL, AM, and AH by increasing the number of pieces / m ² ). In this way, the opening area and the opening shape of the air inlet 21h can be made to have the same specifications by the three of the low suction area AL, the middle suction area AM, and the high suction area AH. This makes it easier to design the air inlet 21h. That is, since the opening specification that is the opening area and the opening shape can be unified into one type, an opening specification that effectively restricts the passage of the liquid absorbent material 2 while suppressing clogging by the liquid absorbent material 2 is found. As a result, the intake port 21h can be easily designed. Therefore, this is the case in this example (see FIG. 5).

On the other hand, as the opening shape of the intake port 21h, an appropriate shape such as a perfect circle shape, an elliptical shape, or a polygon such as a rectangle can be adopted. In this example, a perfect circle shape is adopted as shown in FIG. is doing. When the opening shape is a perfect circle shape, the opening size may be defined by a hole diameter instead of the opening area. In this example, the hole diameter is a predetermined value selected from a range of 0.1 to 1.0 mm. It is. In terms of the opening area, it is selected from the range of 0.007 to 0.8 mm ² .

Further, in this example, the 60 ° staggered arrangement pattern is adopted as the arrangement pattern of the intake ports 21h in any of the above-described low suction area AL, middle suction area AM, and high suction area AH. Here, the 60 ° staggered arrangement pattern is formed by arranging the

inlets

21h, 21h,... At the vertices of a plurality of equilateral triangles arranged adjacent to each other while sharing the sides as shown in FIG. In other words, it can be said to be a staggered arrangement in which the distances between

adjacent inlets

21h, 21h are all the same. In the case of this 60 ° staggered arrangement, the distance between the

adjacent suction ports

21h and 21h is made different between the low suction region AL, the middle suction region AM, and the high suction region AH, thereby allowing the suction ports to be different from each other. The number of formations 21h is different between the regions AL, AM, and AH. Incidentally, if the 60 ° staggered arrangement pattern is adopted, the thickness of the absorber 1 can be made substantially uniform. However, it is not limited to the 60 ° staggered arrangement pattern, and for example, a lattice arrangement pattern in which the

intake ports

21h, 21h,.

Incidentally, the outer peripheral surface 20a of the rotary drum 20 provided with the groove 21 is formed by a suitable cylindrical member 20p as shown in FIG. The cylindrical member 20p may be a single inseparable member over the entire circumference in the circumferential direction Dc. However, depending on the case, the cylindrical member 20p may be divided into a plurality of units in a unit corresponding to the unit groove 21u. It may be divided into members 20 pd, 20 pd... In this example, the latter mode is adopted.

6 and 7 are explanatory diagrams of the divided members 20pd, 20pd... 6 is a schematic perspective view of the cylindrical member 20p with some of the divided members 20pd and 20pd removed, and FIG. 7 is a schematic view of the divided member 20pd further broken down into three types of parts 20pd1, 20pd2, and 20pd3. It is a perspective view.

As shown in FIG. 6, each divided member 20pd is an arcuate member 20pd bent at a curvature corresponding to the curvature of the outer peripheral surface 20a of the cylindrical member 20p. As shown in FIG. 7, each divided member 20 pd has a circular arc-shaped air-permeable plate 20 pd 1 having the

air inlets

21 h, 21 h... And the air-permeable plate 20 pd 1. A pair of arc-shaped pattern plates 20pd2, 20pd2 and a breathable plate 20pd1 which are covered and fixed in a fixed manner and define a substantially hourglass-shaped unit groove 21u on the outer peripheral surface are reinforced from the inner peripheral surface. Therefore, it has a frame-shaped liner 20pd3 abutted and fixed to the inner peripheral surface as much as possible.

Then, as shown in FIG. 6, the split members 20pd, 20pd,... Are stretched around a pair of

annular members

20f, 20f arranged to face each other with a space in the cylinder axis direction C20 of the rotary drum 20. A plurality of divided members 20pd, 20pd,... Are arranged in the state of the cylindrical member 20p described above. Note that appropriate disc-shaped sealing members (not shown) are provided on both sides of the cylindrical member 20p in the cylinder axis direction C20 so as to be slidable with respect to the cylindrical member 20p. Both end openings in the cylinder axis direction of 20p are respectively sealed. As a result, the inner circumferential space S described above is defined as a substantially closed space on the inner circumferential side of the rotary drum 20.

By the way, the pattern plates 20pd2 and 20pd2 are provided at the positions of both ends of the rotating drum 20 in the cylinder axis direction C20. As a result, the pattern plates 20pd2 and 20pd2 cover only the both end portions of the breathable plate 20pd1 without covering the central portion of the rotating drum 20 in the cylinder axis direction C20. As a result, the unit groove portion 21u The

unit groove portions

21u and 21u adjacent to the direction Dc are connected to each other without inclusions.

Further, as shown in FIG. 7, the frame-shaped liner 20pd3 has a plurality of rod portions B1, B1,..., B2, B2,. It is a member. In this example, six rod portions B1, B1,... Along the cylinder axis direction C20 are arranged as a plurality of examples in the circumferential direction Dc, and the rod portions B2, B2,. Three are arranged as an example in the cylinder axis direction C20.
Here, the rod portions B1, B1 at both ends in the circumferential direction Dc of the former six rod portions B1, B1,... Are located at both ends in the circumferential direction Dc of the unit groove portion 21u. Therefore, there is a possibility that the deposition property of the liquid absorbent material 2 at the boundary position 1BL of the absorbent body 1 to be cut by the cutting device 61 is somewhat affected. However, even in that case, the high suction areas AH and AH having the highest aperture ratio in the unit groove 21u are respectively provided in the unit groove 21u corresponding to the rods B1 and B1 at the both ends. Since they are associated with each other, the influence can be minimized.

<<< Cutting device 61 >>>
As shown in FIG. 3, the cutting device 61 is disposed adjacent to the downstream end of the suction belt conveyor 41 in the transport direction. And the continuous body 1r of the absorber conveyed by the suction belt conveyor 41 is cut | disconnected in the boundary position 1BL of the absorber 1, and the cut sheet-like absorber 1 is produced | generated by this. Although this is repeated, the boundary position 1BL is included in the high suction area AH on the bottom surface 21a of the groove 21 as shown in FIG. It is contained in the deposited high basis weight portion 1H. Therefore, the continuous body 1r of the absorbent body can be cut with high cutting ability.

As shown in FIG. 3, in this example, the cutting device 61 has a pair of

rolls

62c and 62a arranged side by side in the thickness direction of the continuous body 1r of the absorbent body with the outer peripheral surfaces facing each other. Each of the

rolls

62c and 62a is continuously driven and rotated so as to feed the continuous body 1r of the absorbent body downstream in the transport direction while keeping the transport direction of the suction belt conveyor 41 in the transport direction. One of the pair of

rolls

62c, 62a is a cutter roll 62c having cutter blades 63, 63 (in the example of FIG. 3, two cutter blades 63, 63) on the outer peripheral surface, and the other The roll 62a is an anvil roll 62a that receives the

cutter blades

63, 63 of the cutter roll 62c at an outer peripheral surface or an appropriate receiving portion provided on the outer peripheral surface. Therefore, the cutter blade 63 of the continuously rotating cutter roll 62c is in contact with the boundary position 1BL in the process in which the absorber continuous body 1r fed from the suction belt conveyor 41 passes between the

rolls

62c and 62a. The absorber continuum 1r is locally pinched and cut at the position 1BL, whereby the absorber 1 is generated.

Here, in order to correctly cut the absorber continuum 1r at the boundary position 1BL as described above, when the boundary position 1BL of the absorber 1 in the continuum 1r passes the arrangement position of the cutting device 61, Although it is necessary to control the rotation operation of the cutter roll 62c so that the cutter blade 63 is in contact with the boundary position 1BL, this control is realized as follows, for example.

First, the suction deposition apparatus 11 and the cutting apparatus 61 are controlled to perform their own operations in conjunction with each other based on a synchronization signal. Here, the synchronization signal is an aggregate of unit signals in which a predetermined unit signal is repeatedly output continuously. Each time the unit signal is output, each of the

devices

11 and 61 corresponds to one absorber. Are controlled by appropriate control units such as a computer and a programmable logic controller (hereinafter referred to as PLC).

For example, when the unit signal has a rotation angle value of 0 ° or more and less than 360 ° (hereinafter referred to as 0 ° to 360 °) as a rotation angle value for one rotation, the suction deposition apparatus 11 For each output of 0 ° to 360 ° as a unit signal, the rotation drum 20 corresponds to one rotation body 1 (for example, in the example of FIGS. 3 and 4, the rotation drum 20 has six

unit groove portions

21u, 21u. .., So that a servo motor (not shown) as a drive source of the rotary drum 20 is controlled by an appropriate control unit (not shown) so as to rotate by 60 ° (= 360 ° / 6)). For example, the suction belt conveyor 41 is also continuously transported by the transport amount corresponding to one absorbent body 1 for each output of the unit signal 0 ° to 360 °. The conveyor 4 Servomotor as a drive source (not shown) is controlled by a suitable control unit (not shown) (e.g., position control).

The cutting device 61 also has a rotation angle corresponding to one absorber 1 (for example, in the example of FIG. 3, the cutter roll 62c has two cutter blades 63, each time an output of 0 ° to 360 ° which is a unit signal. 63, a servo motor (not shown) as a drive source of the roll 62c is appropriately connected to an appropriate computer or PLC or the like so that the cutter roll 62c rotates by 180 ° (= 360 ° / 2)). Control (for example, position control) is performed by a control unit (not shown). Further, here, in the cutting device 61, what value is output in the unit signal when the boundary position 1BL passes through the roll gap between the cutter roll 62c and the anvil roll 62a. Is known in advance through trial operation and the like. For example, when the unit signal has a rotation angle value of 0 ° to 360 ° as described above, the rotation angle value of the unit signal to be output when the boundary position 1BL passes through the roll gap is, for example, 90 °. This is known in advance through trial operation and the like. Therefore, for example, when the rotation angle value of 90 ° is output, the rotation angle position of the cutter roll 62c may be mechanically adjusted in advance so that the cutter blade 63 comes closest to the outer peripheral surface of the anvil roll 62a. Thereafter, every time each boundary position 1BL in the absorber continuous body 1r passes the position of the cutting device 61, the cutter roll 62c rotates so that the cutter blade 63 contacts the boundary position 1BL. . Incidentally, the position control of each servo motor described above is realized by a known control method such as feedback control. For example, each servo motor has a built-in rotation angle measurement sensor such as a rotary encoder, and each corresponding control unit has a small difference between the actual value of the rotation angle of the motor output shaft measured by the sensor and the command value. Thus, the rotation of the output shaft is controlled.

=== Second Embodiment ===
FIG. 8 is a schematic longitudinal sectional view of the manufacturing apparatus 10a of the second embodiment. The difference from the first embodiment described above is that a pinching device 51 is additionally provided between the suction deposition device 11 and the cutting device 61. That is, it is mainly different in that the absorbent body 1r is clamped in the thickness direction by the clamping device 51 and then cut by the cutting device 61. Therefore, since the other points are generally the same as in the first embodiment, the same reference numerals are given to the same components, and descriptions thereof are omitted.

As shown in FIG. 8, the pinching device 51 is disposed adjacent to the downstream end of the suction belt conveyor 41 in the transport direction. Then, the absorbent continuum 1r conveyed by the suction belt conveyor 41 is pinched in the thickness direction, and the absorbent continuum 1r is sent out to the cutting device 61 while being pinched. Here, the continuous body 1r of the absorbent body after passing through the pinching device 51 is brought into a high-density tight state as a whole by the pinching pressure. Therefore, it is possible to effectively prevent collapse or tearing of the continuous body 1r of the absorbent body that may occur during subsequent cutting. Further, since the surface of the continuous body 1r is also tightened by the clamping pressure, it is possible to effectively prevent the liquid absorbent material 2 on the same surface from being peeled off at the time of cutting and attached and deposited on the cutting edge of the cutter blade 63 of the cutting device 61. As a result, it is possible to effectively prevent the cutting performance of the cutter blade 63 from being lowered due to such adhesion and accumulation.

In this example, the pinching device 51 has a pair of

rolls

52u and 52d arranged side by side in the thickness direction of the continuous body 1r of the absorbent body with their smooth outer peripheral surfaces facing each other. Each of the

rolls

52u and 52d is continuously driven and rotated so as to feed the continuous body 1r of the absorbent body downstream in the transport direction while keeping the transport direction of the suction belt conveyor 41 in the transport direction. Yes. The rotation speed value of each

roll

52u, 52d is controlled by an appropriate control unit such as a computer or PLC so that the rotation speed value is substantially the same as the conveyance speed value of the absorber continuous body 1r. The continuous body 1r of the absorber can be clamped in a state where there is almost no relative slip on the outer peripheral surfaces of 52u and 52d.

However, the clamping device 51 is not limited to the configuration of the pair of

rolls

52u and 52d described above. For example, although not shown, an apparatus having a pair of endless belts arranged so that outer peripheral surfaces as conveying surfaces face each other may be used. That is, in the case of this apparatus, a pair of endless belts drive and circulate so that each endless belt sends out the continuous body 1r of the absorbent body in the continuous direction while pressing the continuous body 1r of the absorbent body from the thickness direction. As a result, the clamped absorbent body 1 r is conveyed to the cutting device 61.

=== Other Embodiments ===
As mentioned above, although embodiment of this invention was described, said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. Further, the present invention can be changed or improved without departing from the gist thereof, and needless to say, the present invention includes equivalents thereof. For example, the following modifications are possible.

In the above-described embodiment, the apparatus 61 having the cutter roll 62c and the anvil roll 62a is illustrated as the cutting apparatus 61. In the apparatus 61, the cutter blade 63 is pressed against the outer peripheral surface of the anvil roll 62a or its receiving portion. Thus, the absorbent continuum 1r is locally clamped and cut, but the cutting method is not limited to this. For example, the outer peripheral edge of the disk may be a cutting edge and may be cut with a so-called rotating blade that is driven and rotated around the center of the disk, or can be moved to each other in the thickness direction of the absorber continuous body 1r. The pair of blade members provided may be sheared like scissors.
However, the phenomenon that the cutting ability when cutting a bulky and low-rigid material such as the above-described absorbent continuum 1r decreases by a small basis weight appears more conspicuously when cutting by locally pinching. Therefore, in the case of the apparatus having the cutter roll 62c and the anvil roll 62a shown in the first and second embodiments, the present invention is more effective.

In the above-described embodiment, the suction deposition apparatus 11 is exemplified by the apparatus 11 having the rotary drum 20 as a main body, but is not limited thereto. For example, an endless belt that drives and circulates a predetermined circuit, an endless groove formed endlessly on the outer circumferential surface of the endless belt along the continuous direction of the endless belt, and a plurality of air inlets formed on the bottom surface of the endless groove And a spraying duct that is disposed at a predetermined position on the endless belt orbit and that supplies the liquid absorbent material 2 toward the outer peripheral surface of the endless belt.

In the above-described embodiment, a signal having a rotation angle value of 0 ° to 360 ° is exemplified as an example of the unit signal of the synchronization signal, but the present invention is not limited to this. For example, the unit signal may be a digital signal having 8192 digital values from 0 to 8191, or may be a signal of another form.

In the above-described embodiment, as shown in FIG. 5, the middle suction region AM is a portion of the unit bottom surface 21 ua that is slightly upstream of the substantially central portion in the circumferential direction Dc and at both ends in the width direction. AM has been set, but this also has the following meaning. That is, as shown in FIG. 5, the

air inlets

21h, 21h,... Are not formed in the outer portion of the unit bottom surface 21ua in the width direction with respect to the substantially central portion. 2 pours down. Then, the liquid absorbent material 2 that has poured onto the portion does not adsorb to the portion, and rolls exclusively to the upstream portion in the circumferential direction Dc, that is, the portion where the middle suction area AM is set in FIG. It will be adsorbed and deposited on the same part. In such a situation, if the part that is currently the suction area AM is set to the high suction area AH, the basis weight of the part becomes much higher than that of the high suction area AH. As a result, when the diaper is worn, it can give a noticeable discomfort. Therefore, in the example of FIG. 5, in order to avoid such a problem of uncomfortable feeling, the middle suction areas AM and AM are set in the part.

1 absorber, 1B basis weight transition part, 1BL boundary position,
1L low basis weight part (first basis weight part), 1M medium basis weight part,
1H high basis weight part (second basis weight part),
1a ventral part, 1ae end, 1b dorsal part, 1be end, 1c crotch part,
1r absorber continuum,
2 liquid absorbent material, 2r deposit,
10 manufacturing equipment, 10a manufacturing equipment,
11 Suction deposition apparatus,
20 rotating drum, 20a outer peripheral surface, 20f annular member,
20p cylindrical member, 20pd arcuate member (divided member),
20 pd1 breathable plate, 20 pd2 pattern plate, 20 pd3 liner,
21 groove portion, 21a bottom surface (suction surface), 21BL boundary position,
21u unit groove part, 21ua unit bottom surface,
21h Inlet,
22a cylindrical partition, 22b partition,
31 spraying duct, 31a mouth,
41 Suction belt conveyor (take-out conveyor),
42 endless belt, 42a outer peripheral surface (conveying surface), 44 rollers,
45 suction force generation mechanism, 45b suction box, 45bh air intake opening,
51 pinching device, 52u roll, 52u roll,
61 cutting device, 62c cutter roll, 62a anvil roll,
63 cutter blade,
AL Low suction area (first suction area), AM medium suction area,
AH high suction area (second suction area),
B1 bar, B2 bar,
S inner space, Sd substantially closed space,
Z1 first zone, Z2 second zone,
C20 cylinder axis (in the cylinder axis direction), Dc circumferential direction,

Claims

An apparatus for manufacturing an absorbent body having a first basis weight portion where a liquid absorbent material is deposited at a first basis weight and a second basis weight portion deposited at a basis weight higher than the first basis weight. ,
A suction deposition apparatus for generating a continuous body of absorbent bodies continuous in a predetermined direction by sucking and depositing the liquid absorbent material on the suction surface by sucking air from a plurality of suction ports of the suction surface;
A cutting device that generates the absorber by cutting the absorber continuum at a boundary position of the absorber set on the absorber continuum with an interval in the predetermined direction. And
The suction surface has a first suction region in which the intake port is formed with a first aperture ratio and a second suction region in which the intake port is formed with a second aperture ratio higher than the first aperture ratio. And
An apparatus for manufacturing an absorbent body according to an absorbent article, wherein the boundary position is included in the second suction region.
It is a manufacturing apparatus of the absorber according to claim 1, Comprising:
The suction deposition apparatus includes:
A rotating drum that continuously rotates in one direction along the circumferential direction;
An endless groove formed on the outer peripheral surface of the rotating drum over the entire circumference, and the groove that sucks and deposits the liquid absorbent material using the bottom surface as the suction surface;
A spraying duct disposed at a first predetermined position in the circumferential direction and spraying and supplying the liquid absorbent material toward the outer peripheral surface of the rotating drum;
A take-out transport device that is disposed at the second predetermined position in the circumferential direction and receives and transports the liquid absorbent material sucked and deposited in the groove as a continuous body of the absorber from the groove while being transported from the groove. And having
The depth of the said groove part is constant over the full length of the width direction of the said groove part, and the full length of the said circumferential direction, The manufacturing apparatus of the absorber which concerns on the absorbent article characterized by the above-mentioned.
It is a manufacturing apparatus of the absorber according to claim 2, Comprising:
The number of intake ports formed per unit area in the second suction region is set to be greater than the number of intake ports formed per unit area in the first suction region.
About the opening area and opening shape of the said air inlet, the manufacturing apparatus of the absorber which concerns on the absorbent article characterized by mutually having the same specification between the said 1st low suction area | region and the said 2nd suction area | region .
It is a manufacturing apparatus of the absorber according to claim 2 or 3,
The rotating drum has a cylindrical member that becomes the outer peripheral surface of the rotating drum,
The cylindrical member has a plurality of divided members divided in the circumferential direction in units corresponding to the absorber,
The dividing member has unit groove portions corresponding to the groove portions, and the unit groove portions adjacent to each other in the circumferential direction are continuous by arranging a plurality of the dividing members adjacent to each other in the circumferential direction. The manufacturing apparatus of the absorber which concerns on the absorbent article characterized by these.
It is a manufacturing apparatus of the absorber according to claim 4, Comprising:
The apparatus for manufacturing an absorbent article according to an absorbent article, wherein the second suction region is continuous so as to straddle a boundary position between the unit groove portions adjacent in the circumferential direction.
An apparatus for manufacturing an absorbent body according to any one of claims 2 to 5,
The take-out and transport device includes an endless belt that rotates around the outer peripheral surface of the rotating drum so as to face the outer peripheral surface as the transport surface, and suction that generates suction force on the outer peripheral surface of the endless belt. An apparatus for manufacturing an absorbent body according to an absorbent article, comprising: a force generation mechanism.
An apparatus for manufacturing an absorbent body according to any one of claims 1 to 6,
Having a clamping device for clamping the absorber continuum in the thickness direction of the absorber continuum;
An absorbent body manufacturing apparatus according to an absorbent article, wherein the continuous body of the absorbent body clamped by the clamping apparatus is conveyed to the cutting apparatus.
A method for producing an absorbent body having a first basis weight portion deposited with a first basis weight and a second basis weight portion deposited with a basis weight higher than the first basis weight. ,
Generating a continuous body of absorbent bodies continuous in a predetermined direction by sucking and depositing the liquid absorbent material on the suction surface by sucking air from a plurality of suction ports of the suction surface;
Generating the absorber by cutting the continuum of the absorber at a boundary position of the absorber set on the continuum of the absorber with an interval in the predetermined direction. ,
The suction surface has a first suction region in which the intake port is formed with a first aperture ratio and a second suction region in which the intake port is formed with a second aperture ratio higher than the first aperture ratio. And
The method for manufacturing an absorbent body according to an absorbent article, wherein the boundary position is included in the second suction region.