CN107028702B

CN107028702B - Absorbent article manufacturing apparatus

Info

Publication number: CN107028702B
Application number: CN201710215114.1A
Authority: CN
Inventors: 戴文明; 龚志龙; 胡文军
Original assignee: Huangshan Futian Precision Manufacturing Co Ltd
Current assignee: Huangshan Futian Precision Manufacturing Co Ltd
Priority date: 2017-04-02
Filing date: 2017-04-02
Publication date: 2020-03-17
Anticipated expiration: 2037-04-02
Also published as: CN107028702A

Abstract

The invention discloses a manufacturing device of an absorptive article, comprising: a supply unit that stores the particulate absorbent material and delivers a prescribed amount of the particulate absorbent material from an outlet; a dividing unit that intermittently disposes the particulate absorbent material output from the supply unit on a surface of the sheet; a conveying unit for conveying the sheet-like object to the lower end face of the output side of the dividing unit at a certain speed; and a speed change device for increasing or decreasing the conveying speed of the sheet, and making the conveying speed of the sheet introduced into the speed change device equal to the conveying speed led out from the speed change device; the operation of intermittently arranging the particulate absorbent material, which is output through the dividing unit, on the surface of the sheet occurs during a time interval in which the speed changing device lowers the linear velocity of the sheet. The invention can adjust a certain section of speed in the material advancing at constant speed according to a preset speed change rule through the cooperative work of the reciprocating transverse moving driving mechanism and the variable speed rotary driving mechanism in the speed change device, so that the granular absorbing material applying device can meet the requirement of a high-speed production line on the premise of not excessively damaging powder bodies.

Description

Absorbent article manufacturing apparatus

Technical Field

The invention belongs to the field of equipment manufacturing of sanitary products, and particularly relates to a feeding device capable of discontinuously feeding a granular absorbent material to the upper surface of a moving sheet.

Background

Disposable wearing sanitary products such as diapers, pull-ups, sanitary napkins and the like are provided with an absorbent body for absorbing liquid such as urine, and the absorbent body is provided with particulate bodies of Super absorbent resin (hereinafter referred to as SAP) in order to efficiently absorb liquid. Often, manufacturers of disposable hygiene articles wish to place SAP in areas where it is needed, i.e. to create discontinuous SAP application, thereby saving costs and creating products with lower environmental impact because they are made of less material.

In the conventional practice in the art, such as in chinese patent document CN 104470479, a rotating distribution cylinder is used, i.e. a plurality of pits or grooves are provided in the outer surface of the cylinder, said pits or grooves being provided in the area where deposition of SAP is desired and having a certain size to ensure that a certain amount and shape of SAP is deposited. A disadvantage of this solution is that the shape and amount of SAP deposited is uniquely determined by the pits or grooves. In addition, to solve the problem of filling and removing the SAP in the pits or grooves at high speed, additional clamping and releasing devices are required, increasing the complexity and cost of the apparatus.

Further, as disclosed in chinese patent document CN 104884011 a, although a powder and granular material supply device is proposed in which a supply path of powder and granular material is opened and closed by an opening and closing member crossing the supply path, the device does not disclose a specific configuration of an opening and closing means. Further, as the sheet conveying speed increases, the rotation speed of the opening/closing member needs to be increased to meet the demand for high-speed production, which inevitably leads to an increase in the mechanical damage of the powder or granule. Reducing the speed of the entire production line to prevent this problem inevitably reduces the overall productivity.

Therefore, how to make the powder and granular material supply device meet the demand for high-speed production under the condition of reducing the damage of the powder and granular material as much as possible becomes a technical problem to be solved by those skilled in the art.

Disclosure of Invention

Problems to be solved by the invention

In view of the above, the present invention provides an apparatus for manufacturing an absorbent article, which adjusts a speed of a certain section of a material traveling at a constant speed according to a predetermined speed change rule by cooperative work of a reciprocating traverse driving mechanism and a variable speed rotary driving mechanism in a speed change device, thereby solving a problem that a conventional apparatus cannot be adapted to a high-speed production requirement.

In order to solve the above problems, the present invention provides an apparatus for manufacturing an absorbent article, comprising:

a supply unit that stores the particulate absorbent material and delivers a prescribed amount of the particulate absorbent material from an outlet;

a dividing unit that intermittently disposes the particulate absorbent material output from the supply unit on a surface of the sheet;

a conveying unit for conveying the sheet-like object to the lower end face of the output side of the dividing unit at a certain speed;

and a speed change device for increasing or decreasing the conveying speed of the sheet so that the conveying speed at which the sheet is introduced into the speed change device is equal to the conveying speed at which the sheet is discharged from the speed change device. By adopting the technical scheme, the conveying speed of the sheet-shaped object is reduced through the speed changing device, the time that the granular absorbent material is intermittently arranged on the surface of the sheet-shaped object is indirectly prolonged, the dividing unit is not required to be improved during high-speed production, and the defect that the damage of powder and granular bodies is aggravated due to the fact that the dividing disc in the dividing unit rotates too fast is avoided.

To meet the demand for higher speed production lines, the divided disks in the dividing unit are rotated at a relatively low rotational speed, and the particulate absorbent material discharged from the dividing unit is intermittently arranged on the surface of the sheet material at intervals when the linear speed between the two floating rolls is reduced. Correspondingly, when the production line speed is slowed down to be relatively lower than the rotating speed of the cutting disk, the configuration operation can also be carried out in the time interval when the linear speed between the two floating rollers is faster. Since the time for receiving the particulate absorbent material is prolonged, the amount of the particulate absorbent material received per unit area of the sheet-like object is increased, and therefore, the production line can be adapted to the demand for high-speed production.

The dividing unit includes: the device comprises a flow channel for outputting the granular absorbing materials from a feeding unit to the surface direction of the sheet-shaped object, a box body arranged on the flow channel, a dividing disc arranged in the box body and obliquely arranged with the flow channel, a connecting shaft connected with the dividing disc, and a servo motor for driving the connecting shaft to rotate. The partition plate is provided with a through groove for the particle-shaped absorbing material to pass through. And a conveying screw arranged below the split disk is further arranged obliquely below the box body, and a recovery unit is further arranged below the conveying screw. The recovery unit may employ a container to collect the particulate absorbent material and may preferably also re-convey the collected particulate absorbent material to the feed unit.

The feeding unit continuously supplies the granular absorbing materials to the dividing unit, the granular absorbing materials flow to the dividing disc through the flow channel, the dividing disc periodically rotates around the connecting shaft under the driving of the servo motor, and the granular absorbing materials pass through the dividing disc to flow to the flow channel when the through groove rotates to be right below the flow channel and then flow to the upper surface of the sheet-shaped object through the flow channel; when the through groove rotates to the position not right below the flow channel, the particulate absorption materials fall onto the upper surface of the dividing disc plate, and the particulate absorption materials flow to the conveying spiral side at the lower right corner of the box body under the action of centrifugal force. The dividing disk continuously rotates to form two intermittent streams of particulate absorbent material.

The transmission device includes: the sheet processing apparatus includes a first dancer roller for receiving the sheet fed from upstream, a second dancer roller for feeding out the processed sheet downstream, a first drive mechanism for reciprocating the first dancer roller and the second dancer roller in a lateral movement in the same direction, and a second drive mechanism for rotating the first dancer roller and the second dancer roller at a variable speed. The first floating roller and the second floating roller can perform reciprocating transverse movement under the action of the first driving mechanism, and can perform variable-speed rotary movement under the action of the second driving mechanism. Adopt above-mentioned technical scheme, on the one hand because two floating rolls of during operation are the syntropy motion, the motion amplitude is little, accords with the miniaturized demand of equipment more, and on the other hand sideslip motion's common mounting means forms such as wired rail and linear guide way, consequently have the processing cost low, and the reciprocating motion stroke is changeed and is controlled to and the advantage that the precision is high. Further, one gear shift period of the first drive mechanism is equal to one gear shift period of the second drive mechanism.

As for the first driving mechanism, this mechanism is used for driving the first dancer roller and the second dancer roller to perform reciprocating traverse in the same direction as or in the opposite direction to the sheet conveying direction. In other words, when the linear velocity between the two floating rollers needs to be reduced, the first floating roller and the second floating roller move in the direction opposite to the sheet conveying direction at the same time; when the linear speed between the two floating rollers needs to be increased, the first floating roller and the second floating roller move along the same direction as the sheet conveying direction at the same time. The specific structure for realizing the above actions is various, such as the form of forward and reverse rotation of the belt wheel driven by the servo motor, the form of forward and reverse rotation of the belt wheel driven by the crank-link mechanism, or the form of the four-bar slider mechanism, etc., which are not described herein in detail.

Of course, as one skilled in the art would readily appreciate, the pulleys in the pulleys described above could be replaced by gears and the belts replaced by chains. Modifications in this manner should also be understood to constitute similar variations of the invention.

As an embodiment of the first driving mechanism, the device comprises two pulleys and a belt for reciprocating transverse movement sleeved on the two pulleys. A first connecting piece connected with the first floating roller in a rotatable mode and a second connecting piece connected with the second floating roller in a rotatable mode are arranged on the belt for reciprocating transverse movement. One of the two pulleys is a driving pulley which rotates forward and backward through a first servo motor. It should be noted that, above-mentioned first actuating mechanism has simple structure, and the installation is swift, debugs convenient advantage.

Further, a second driving mechanism for rotating the first dancer roller and the second dancer roller at the same peripheral speed, includes: the device comprises a rotatable input roller positioned on the upstream side of a first floating roller, a rotatable output roller positioned on the downstream side of a second floating roller, a driving roller used for driving the first floating roller and the second floating roller to rotate at the same peripheral speed, a plurality of tension rollers and a synchronous belt erected on the rollers. The sheet-shaped objects are guided to move to the first floating roller by the input roller, the sheet-shaped objects are guided to be output from the second floating roller by the output roller, and the driving roller is connected with the second servo motor and drives the rollers to rotate at a synchronous speed change through the synchronous belt.

In addition, in order to ensure that the particulate absorbent material is stably arranged on the sheet-like object, the conveying unit is also provided with a negative pressure device.

The invention has the beneficial effects that:

the speed change device is additionally arranged in the application device of the granular absorbent material, so that the application device of the granular absorbent material can meet the requirement of a high-speed production line on the premise of not excessively damaging the powder body. The speed change device has the advantages of compact structure, convenient installation, easy miniaturization and convenient control of the linear speed of materials, utilizes the cooperative action of the reciprocating transverse moving driving mechanism and the variable speed rotating driving mechanism to ensure that the reciprocating motion directions of the two floating rollers are always kept the same, and the speeds are kept synchronous, and realizes the increase and decrease of the carrying speed of the sheet object on the premise that the carrying speed of the sheet object introduced into the speed change device is equal to the carrying speed derived from the speed change device.

The invention will be explained in more detail below with reference to the drawings and examples.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic diagram showing the movement of the particulate absorbent material inside the housing when the separation discs separate the flow paths.

Fig. 3 is a view taken along direction a of fig. 2, and shows a state in which the split disks block the flow paths.

Fig. 4 is a schematic diagram showing the movement of the particulate absorbent material inside the housing when the separation disc is in communication with the flow channel.

Fig. 5 is a view taken along direction a of fig. 4, showing a state where the split disks are connected to the flow paths.

FIG. 6 is a schematic diagram of a split disc structure according to another embodiment.

Fig. 7 is a partially enlarged view of fig. 1.

Fig. 8 is a schematic view of a product manufactured by the present invention.

Fig. 9 is a schematic side view of the transmission, showing the first and second dancers in a centered position.

Fig. 10 is a schematic side view of the transmission, showing the first and second dancers in the left extreme position.

Fig. 11 is a schematic side view of the transmission, showing the first and second dancers at right end limit positions.

Fig. 12 is a schematic view showing the travel of the sheet.

In the figure, 101, a feeding unit, 102, a dividing unit, 103, a conveying unit, 104, a guide roller unit, 105, a recovery unit, 100, a speed changing device, 1, a flow channel, 2, a box body, 3, a dividing disc, 4, a connecting shaft, 5, a servo motor, 6, an arc groove, 7, a conveying screw, 8, a notch, 9, a notch, 10, a negative pressure cavity, 1a, a first flow channel, 1b, a second flow channel, 1c, a third flow channel, 1d, a fourth flow channel, V₀Conveying speed of sheet material, V₁The conveying speed V of the sheet-like article introduction speed change device₂A conveying speed derived from a speed change device, P, a sheet, P', a moving sheet, 11, a first floating roller, 12, a second floating roller, 13, a first driving mechanism, 14, a second driving mechanism, 15, a pulley, 16, a belt for reciprocating transverse movement, 17, a first connecting piece, 18, a second connecting piece, 20, an input roller, 21, an output roller, 22, a driving roller, 23, a tension roller, 24, a synchronous belt, W _ A, the reciprocating direction of the first driving mechanism, W _ B, the rotating direction of the second driving mechanism, D₀The sheet conveying direction D₁The same direction as the sheet conveying direction, D₂And a direction opposite to the sheet conveying direction.

Detailed Description

The following embodiments are described in order to clearly understand the present invention by referring to the drawings, but the embodiments and the drawings are only for illustration and description and should not be used to limit the protection scope of the present invention. The scope of the invention is defined by the claims.

As shown in fig. 1 to 5, an apparatus for manufacturing an absorbent article divides a particulate absorbent material discharged from a supply unit 101 into two particulate absorbent material

intermittent flows

2a, 2b by continuous rotation of a dividing disk 3 in a dividing unit 102, wherein the particulate absorbent material intermittent flow 2a flows toward a conveying screw 7 and the other intermittent flow 2b flows toward the upper surface of a sheet P.

The apparatus for manufacturing the absorbent article includes: a feeding unit 101, a dividing unit 102, a conveying unit 103, a speed changing device 100, a guide roller unit 104, and a recovery unit 105.

The supply unit 101 stores the particulate absorbent material and feeds a predetermined amount of the particulate absorbent material from the outlet to the dividing unit.

The dividing unit 102 is configured to intermittently arrange the particulate absorbent material output from the supply unit 101 on the surface of the sheet P.

The division unit 102 includes: the device comprises a flow channel 1 for outputting the granular absorbing materials from a material supply unit 101 to the surface direction of the sheet-shaped object P, a box body 2 arranged on the flow channel 1, a dividing disc 3 which is arranged in the box body 2 and is obliquely arranged with the flow channel 1, a connecting shaft 4 connected with the dividing disc 3, and a servo motor 5 which is arranged on the box body and is used for driving the connecting shaft 4 to rotate. The divided disk 3 rotates in the Z direction about the connecting shaft 4.

A conveying screw 7 provided below the split disk 3 is provided obliquely below the inside of the case 2. The recovery unit 105 is disposed below the conveyor screw 7 for collecting the discontinuous flow 2 a.

The flow channel 1 is composed of a first flow channel 1a, a second flow channel 1b, a third flow channel 1c, and a fourth flow channel 1d, which are coaxially arranged or arranged along the Y direction. Wherein, the first flow channel 1a is connected with the output end of the feeding unit 101; the second flow path 1b is connected to the first flow path 1a and transports the particulate absorbent material to the upper end of the divided disk 3; the third flow channel 1c is provided below the divided disk 3, and the opening corresponds to the second flow channel 1 b; the upper end of the fourth flow path 1d is connected to the third flow path 1c, and the lower end is close to the upper surface of the sheet P.

The dividing disk 3 is provided with an arc groove 6 for conveying the particulate absorbent material to the third flow channel 1c through the second flow channel 1 b. The circular arc groove 6 is preferably shaped like a sector concentric with the split disk 3, as shown in fig. 3, 5, and 6. The axes II-II of the

flow channels

1a, 1b, 1c and 1d penetrate through the central line of the arc groove 6, so that the discontinuous flow 2b of the granular absorbent material is formed better.

The arc grooves 6 on the split disks 3 rotate periodically, and the arc grooves 6 can rotate at a constant speed or at a non-constant speed within a 360-degree rotation period. As shown in fig. 8, when the arc groove 6 rotates at a non-uniform speed, the speed of the notches 8 and 9 passing through the flow channel 1 can be different, so as to adjust the length D of the discontinuous particulate absorbent material formed on the upper surface of the sheet P by the discontinuous flow 2b and the interval C between adjacent particulate absorbent materials, so that one set of equipment can produce discontinuous particulate absorbent materials with different specifications.

The direction of rotation of the circular arc groove 6, as shown in fig. 3 and 5, is preferably counterclockwise, because the housing 2 is high on the left and low on the right, so that the intermittent flow 2a of the particulate absorbent material can be better directed toward the conveying screw 7.

As shown in fig. 6, the number of the arc grooves 6 in the divided disk 3 may be one or more. At low speeds, one is preferred; at high speeds, two or four are preferred. The servo motor 5 can be conveniently controlled by the arrangement, and meanwhile, the influence of the airflow on the discontinuous flow 2b can be effectively reduced under the high-speed condition.

As shown in fig. 7, the cross-sectional shape of the end portion of the second flow channel 1b close to the split disk 3 is a trapezoid and is provided with a chamfer 1e, and the cross-sectional shape of the end portion of the third flow channel 1c close to the split disk 3 is also a trapezoid and is provided with a chamfer 1f, so that the above structure can effectively reduce the influence of the airflow on the

discontinuous flows

2a and 2b at high speed. The distance 31 between the second flow channel 1b and the dividing disc 3 should be 2-5 mm, wherein 3 mm is preferred; the distance 32 between the third flow channel 1c and the dividing disk 3 should be 1-3 mm, wherein 2 mm is preferable, and the design can effectively reduce the influence of the airflow on the

discontinuous flows

2a and 2b at high speed, so that the preferable distance is preferable.

A conveying unit 103 for conveying the sheet P in the X direction at a constant speed V₀To the output-side lower end surface of the fourth flow passage 1d in the partition unit 102. The conveying unit 103 is provided with a negative pressure unit 10 directly below the fourth flow path 1d, and is preferable in order to eliminate the pulsation of the particulate absorbent material when the intermittent flow 2b flows toward the upper surface of the sheet P during the movement of the sheet P in the X direction at a high speed, which can reduce the influence of the discontinuous distribution of the particulate absorbent material.

The box body 2 illustrated in the figure is arranged in a left-high-right-low manner, and at this time, the guide roller unit 104 is arranged on the left side of the flow channel 1, so that after the discontinuous flow 2b flows to the upper surface of the sheet P, the moving sheet P 'is combined therewith, and thus the influence of the moving sheet P' on the discontinuous distribution of the particulate absorbent material in the moving process can be reduced, and the preference is achieved. If the box body is placed in a state that the left side is low and the right side is high, the guide roller unit 104 is arranged on the right side of the flow channel 1, and the effect is the same.

The transmission will be described in detail below.

Referring to fig. 9 to 12, a speed changing device 100 for increasing or decreasing the conveying speed V of the sheet P₀And the sheet material is guided into the conveying speed of the speed changing deviceDegree V₁And a conveying speed V derived from the transmission₂Are equal. It has the following components:

a first dancer roller 11 for receiving the sheet P fed from upstream, a second dancer roller 12 for feeding the processed sheet P downstream, a first drive mechanism 13 for reciprocating the first dancer roller 11 and the second dancer roller 12 in a lateral movement in the same direction, and a second drive mechanism 14 for rotating the first dancer roller 11 and the second dancer roller 12 at a variable speed. One gear change cycle of the first drive mechanism 13 is equal to one gear change cycle of the second drive mechanism 14.

The first dancer roller 11 and the second dancer roller 12 may be reciprocated in the lateral direction by the first driving mechanism 13, and may be rotated at a variable speed by the second driving mechanism 14.

Next, an example of the first and second driving mechanisms will be described.

The first driving mechanism 13 includes two pulleys 15, and a belt 16 for reciprocating transverse movement fitted around the two pulleys 15. A first link 17 rotatably connected to the first dancer 11 and a second link 18 rotatably connected to the second dancer 12 are attached to the belt 16 for reciprocating traverse. One of the two pulleys 15 is a drive pulley that is rotated forward and backward by a first servo motor, not shown. An arrow W _ a illustrated in fig. 9 indicates a direction in which the first drive mechanism reciprocates.

The second driving mechanism 14 is for rotating the first dancer roller 11 and the second dancer roller 12 at the same peripheral speed, and includes: a rotatable feed roller 20 located on the upstream side of the first dancer roller 11, a rotatable take-off roller 21 located on the downstream side of the second dancer roller 12, a drive roller 22 for driving the first dancer roller 11 and the second dancer roller 12 to rotate at the same peripheral speed, a plurality of tension rollers 23, and a timing belt 24 stretched over the

rollers

11, 12, 20, 21, 22, 23.

The input roller 20 guides the sheet P to move towards the first floating roller 11, the output roller 21 guides the sheet P to be output from the second floating roller 12, and the driving roller 22 is connected with a second servo motor and drives each roller to rotate at a synchronous speed change through a synchronous belt 24. An arrow W _ B illustrated in fig. 9 indicates the rotation direction of the second drive mechanism.

As shown in fig. 12, taking the example of conveying the entire sheet from right to left, the sheet P sequentially passes around the input roller 20, the first dancer roller 11, the second dancer roller 12, and the output roller 21, and the conveying speed V of the sheet is set to the speed change device₁And a conveying speed V derived from the transmission₂Equal, V₀Which represents the transport speed or linear velocity of the sheet between the two dancers.

First, when the linear speed of the sheet between the two floating

rollers

11, 12 needs to be increased in the CD section, the first floating roller 11 and the second floating roller 12 are simultaneously along the sheet conveying direction D₀Same direction D₁Movement, i.e. as shown in fig. 10;

secondly, when the linear speed of the CD section sheet between the two floating

rollers

11 and 12 needs to be reduced, the first floating roller 11 and the second floating roller 12 are simultaneously along the sheet conveying direction D₀Opposite direction D₂Movement, i.e. as shown in fig. 11.

The transmission device alternately and repeatedly carries out high-speed conveyance and low-speed conveyance of the sheet-like objects. In the high-speed conveyance process, the moving speed of the sheet P between the two

dancers

11, 12 is higher than the speed of the sheet P entering the first dancer 11. On the other hand, in the low speed conveyance, the moving speed of the sheet P between the two

dancer rollers

11, 12 is lower than the speed of the sheet P entering the first dancer roller 11.

When the continuous feeding unit 101 works, the particulate absorption materials are continuously fed to the dividing unit 102, the particulate absorption materials flow to the dividing disc 3 through the first flow channel 1a and the second flow channel 1b along the Y direction, the dividing disc 3 is driven by the servo motor 5 to periodically rotate around the I-I axis, the rotation direction is the Z direction, and as the arc groove 6 is formed in the dividing disc 3, when the arc groove 6 rotates to the position right below the second flow channel 1b, the particulate absorption materials pass through the dividing disc 3 to flow to the third flow channel 1c and then flow to the upper surface of the sheet P through the fourth flow channel 1 d; when the circular arc groove 6 rotates to a position not directly under the second flow path 1b, the particulate absorbent falls on the upper surface of the split disk 3, and due to the inclined arrangement, the particulate absorbent flows toward the conveying screw 7 in the lower right corner of the case 2 by centrifugal force, and finally falls into the recovery unit 105. The dividing disk 3 continuously rotates to divide the continuous particulate absorbent material into two

discrete streams

2a, 2b of particulate absorbent material, one of which 2a flows toward the conveyor screw 7 and the other 2b flows toward the upper surface of the sheet P.

The above-described embodiments are merely preferred embodiments of the present invention, and not intended to limit the scope of the present invention, so that those skilled in the art should make equivalent changes or modifications to the structures, features and principles of the present invention without departing from the spirit of the present invention.

Claims

1. An apparatus for manufacturing an absorbent article, comprising:

a supply unit (101) that stores the particulate absorbent material and delivers a prescribed amount of the particulate absorbent material from an outlet; a dividing unit (102) that intermittently disposes the particulate absorbent material, which is output from the supply unit (101), on the surface of the sheet (P); a conveying unit (103) for conveying the sheet-like object (P) to the lower end face of the output side of the dividing unit (102) at a constant speed; and a speed change device (100) for increasing or decreasing the conveying speed of the sheet (P) and guiding the sheet to the conveying speed (V) of the speed change device₁) And the conveying speed (V) derived from the speed change device₂) Equal; the arrangement operation in which the particulate absorbent material output from the dividing unit (101) is intermittently arranged on the surface of the sheet (P) occurs during the time interval in which the speed changing device lowers the linear velocity of the sheet;

the transmission device (100) comprises: a first floating roller (11) for receiving the sheet-like object fed from upstream, a second floating roller (12) for feeding the processed sheet-like object downstream, a first driving mechanism (13) for making the first floating roller (11) and the second floating roller (12) move in a reciprocating and transverse manner along the same direction, and a second driving mechanism (14) for making the first floating roller (11) and the second floating roller (12) do variable speed rotation movement; the first floating roller (11) and the second floating roller (12) perform reciprocating transverse movement under the action of a first driving mechanism (13), and meanwhile, the two floating rollers (11, 12) perform variable-speed rotary movement under the action of a second driving mechanism (14);

the first driving mechanism (13) is used for driving the first floating roller (11) and the second floating roller (12) to move transversely in a reciprocating mode along the direction which is the same as or opposite to the conveying direction of the sheet-shaped objects (P), and in the process, the reciprocating motion directions of the two floating rollers (11, 12) are kept the same and the speeds are synchronous; when the linear speed between the two floating rollers (11, 12) needs to be reduced, the two floating rollers (11, 12) simultaneously move along the direction opposite to the conveying direction of the sheet (P); when the linear speed between the two floating rollers (11, 12) needs to be increased, the two floating rollers (11, 12) move along the same direction as the conveying direction of the sheet (P) at the same time.

2. The apparatus for manufacturing an absorbent article according to claim 1, wherein: the dividing unit (102) is provided with a flow channel (1) and a rotatable dividing disc (3) which is obliquely arranged with the flow channel, and the dividing disc (3) is provided with an arc groove (6) for downward conveying of the granular absorbing material; the axis (II-II) of the flow channel (1) can penetrate through the center line of the arc groove (6).

3. The apparatus for manufacturing an absorbent article according to claim 2, wherein: the arc groove (6) is in a fan shape, and the fan shape is concentric with the dividing disc (3).

4. The apparatus for manufacturing an absorbent article according to claim 3, wherein: the arc groove (6) rotates at a constant speed or at a non-constant speed in a rotation period; when the arc groove (6) rotates at a non-uniform speed, the notches (8, 9) at the two ends of the arc groove can be caused to pass through the flow channel (1) at different speeds.

5. The apparatus for manufacturing an absorbent article according to claim 1, wherein: one gear change period of the first drive mechanism (13) is equal to one gear change period of the second drive mechanism (14).

6. The apparatus for manufacturing an absorbent article according to claim 1, wherein: the first drive mechanism (13) includes: two pulleys (15) and a belt (16) for reciprocating transverse movement sleeved on the two pulleys (15); one of the two pulleys (15) is a driving pulley, and a first servo motor for controlling the forward and reverse rotation of the driving pulley is connected to the driving pulley;

the belt (16) for reciprocating transverse movement is also provided with a first connecting piece (17) which is connected with the first floating roller (11) in a rotatable way and a second connecting piece (18) which is connected with the second floating roller (12) in a rotatable way.

7. The apparatus for manufacturing an absorbent article according to claim 1, wherein the second drive mechanism (14) comprises: a rotatable input roller (20) positioned at the upstream side of the first floating roller (11), a rotatable output roller (21) positioned at the downstream side of the second floating roller (12), a driving roller (22) for driving the first floating roller (11) and the second floating roller (12) to rotate at the same peripheral speed, a plurality of tension rollers (23), and a synchronous belt (24) erected on the rollers;

the input roller (20) guides the sheet (P) to move toward the first floating roller (11), and the output roller (21) guides the sheet (P) to be output from the second floating roller (12).

8. The apparatus for manufacturing an absorbent article according to any one of claims 1 to 7, wherein: also included is a guide roller unit (104) for overlaying the moving sheet (P') onto the sheet (P) provided with intermittent particulate absorbent material.