System for preparing super-thick absorption core

Abstract

The utility model discloses a system for preparing an ultra-thick absorption core, the system is used for blowing by arranging a pipe fitting in a demolding area of a partition mechanism arranged in a forming drum in the demolding process of the absorption core, and the size of an air outlet of the pipe fitting in the flow direction is at least larger than the width of the absorption core. Air flow per unit area is reduced by increasing the sectional area of the pipe fitting, so that the risk that the absorption core body is blown away by instantaneous air flow in the demolding process is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of disposable sanitary product manufacturing equipment, in particular to the fields of sanitary napkins, diapers, pull-up pants, and more specifically to a system for preparing an ultra-thick absorbent core. Background Art

[0002] The absorbent core of disposable sanitary products (also known as absorbent articles, such as sanitary napkins for women) is mainly composed of a mixture of fluff pulp fibers and high molecular water-absorbent resins (abbreviated as polymers or SAP). However, in certain specific markets, only fluff pulp fibers need to be added to the absorbent core without adding polymers to meet the liquid absorption requirements. Usually, in order to ensure the absorption performance of this type of absorbent core, the content of fluff pulp fibers needs to be greatly increased, which will lead to an increase in the thickness of the absorbent core, from the traditional 5mm to 8mm to 10mm to 20mm (final product thickness). Therefore, this type of absorbent core is generally called an ultra-thick absorbent core.

[0003] In the molding process of manufacturing the ultra-thick absorbent core, the molding thickness of the ultra-thick absorbent core in the molding mold generally reaches 17mm to 22mm (after the clamping process on the downstream side, the thickness of the final product reaches between 10mm and 20mm). The existing absorbent core molding device sets a pipe inside the molding drum to blow air to the absorbent core, so as to demold the absorbent core onto the conveying device. Among them, the size of the air outlet of the pipe along the process direction is set to be smaller, for example, the size value is less than 20mm (smaller cross-sectional area), so as to ensure that a certain flow rate can make the absorbent core of conventional thickness demold instantly. However, when the absorbent core is an ultra-thick absorbent core (whose thickness is almost twice that of conventional products), under the condition of maintaining the original flow rate, due to the small cross-sectional area, the instantaneous airflow of the air outlet will blow away the ultra-thick absorbent core (demolding effect becomes worse), resulting in the head or tail of the ultra-thick absorbent core after demolding lacking cotton, which greatly affects the integrity of the ultra-thick absorbent core after demolding.

[0004] Therefore, it is necessary to propose solutions to the problems of the prior art. Utility Model Content

[0005] The present application provides a system for preparing an ultra-thick absorbent core. During the demolding process of the absorbent core, air is blown by arranging a tube in the demolding area of ​​a partitioning mechanism arranged inside a forming drum, wherein a dimension of the air outlet of the tube along the process direction is at least larger than the width of the absorbent core, so as to increase the cross-sectional area of ​​the tube to reduce the air flow per unit area, thereby reducing the risk of the absorbent core being blown away by the instantaneous air flow during the demolding process.

[0006] The present application embodiment provides a system for preparing an ultra-thick absorbent core, the system comprising:

[0007] A feeding device having a cavity structure;

[0008] The fiber accumulation device is arranged on the downstream side of the feeding device, and the fiber accumulation device includes a forming drum with a drum structure, a plurality of forming molds arranged on the outer periphery of the forming drum, and a partitioning mechanism arranged inside the forming drum; the forming mold rotates synchronously with the forming drum, and the forming mold includes a forming groove matching the absorbent core, the forming groove is connected to the feeding device, and the forming mold is used to adsorb the material for preparing the absorbent core in the forming groove through the conveying path of the feeding device for forming; the partitioning mechanism includes a negative pressure zone, a conveying zone and a demolding zone; the negative pressure zone is connected to the negative pressure device, and the airflow generated by the negative pressure device is connected to the forming groove, and the negative pressure zone is configured so that the material for preparing the absorbent core passes through The conveying path of the feeding device is adsorbed in the forming groove; the conveying area is arranged on the downstream side of the negative pressure area, and the conveying area is configured to convey the absorbent core formed in the forming groove; the demolding area is arranged on the downstream side of the conveying area, and the demolding area is configured to demold the absorbent core formed onto a conveying device, wherein the demolding area is correspondingly arranged on the conveying surface of the conveying device; a pipe is arranged inside the demolding area, and the pipe includes an air inlet and an air outlet, and the air inlet is connected to a blowing device, and the pipe is used to blow out the positive pressure gas generated by the blowing device through the air outlet of the pipe, so as to blow the absorbent core formed in the forming groove onto the conveying surface of the conveying device;

[0009] Wherein, the size of the air outlet of the tube along the flow direction is at least larger than the width of the absorbent core, so as to increase the cross-sectional area of ​​the tube.

[0010] In some embodiments of the present application, the partitioning mechanism also includes a cleaning zone, which is arranged on the downstream side of the demolding zone, and the interior of the cleaning zone is connected to the first adsorption device, and the cleaning zone is configured to clean the material remaining in the molding groove for preparing the absorbent core.

[0011] In some embodiments of the present application, a clamping device is provided on the circumferential outer side of the conveying zone, and the clamping device is used to clamp and convey the absorbent core in the forming groove.

[0012] In some embodiments of the present application, the conveying device includes a first vacuum box having a cavity structure and a second vacuum box having a cavity structure; the first vacuum box is arranged on the upstream side of the second vacuum box, the first vacuum box and the second vacuum box are hinged by an intermediate roller, and each rotates around the intermediate roller to adjust the relative angle between the first vacuum box and the second vacuum box.

[0013] In some embodiments of the present application, the conveying device also includes a conveying roller, a conveying belt and a driving roller; the conveying rollers are respectively arranged on the upstream side of the first vacuum box and the downstream side of the second vacuum box; the conveying belt is annularly wound around the circumferential outer side of the conveying roller and the driving roller, wherein the driving roller is connected to a driving device for providing power for the circular motion of the conveying belt.

[0014] In some embodiments of the present application, the conveying device also includes a third vacuum box and a first vacuum plate; the third vacuum box is arranged inside the first vacuum box; along the process direction, the third vacuum box is arranged to extend from the demolding area to the downstream side; along the width direction, the third vacuum box is arranged at the middle position of the first vacuum box, wherein the width direction is perpendicular to the process direction; the first vacuum plate is arranged above the first vacuum box; the first vacuum plate is respectively provided with first adsorption holes on both sides along the width direction, and the first vacuum plate is provided with second adsorption holes in the middle position along the width direction; wherein the first adsorption holes match the size of the sheet laid above the conveying device in the width direction, and the second adsorption holes are arranged corresponding to the position of the third vacuum box, and match the size of the absorbent core after demolding in the width direction.

[0015] In some embodiments of the present application, the first vacuum box is connected to the first ventilation duct, the third vacuum box is connected to the second ventilation duct, the first ventilation duct and the second ventilation duct are respectively connected to the second adsorption device and the third adsorption device; the second adsorption device and the third adsorption device respectively transport the first negative pressure gas and the second negative pressure gas to the first vacuum box and the third vacuum box through the first ventilation duct and the second ventilation duct, thereby providing different negative pressures for adsorption to the sheets corresponding to the positions on both sides of the first vacuum plate along the width direction and the demolded absorption core corresponding to the middle position of the first vacuum plate along the width direction; wherein the demolded absorption core is located above the sheet.

[0016] In some embodiments of the present application, the pressure of the second negative pressure gas provided by the third adsorption device is greater than the pressure of the first negative pressure gas provided by the second adsorption device.

[0017] In some embodiments of the present application, a second vacuum plate is arranged above the second vacuum box, and a third adsorption hole is arranged on the second vacuum plate, and the third adsorption hole matches the size of the sheet laid above the conveying device and the absorbent core after demolding in the width direction.

[0018] In some embodiments of the present application, the second vacuum box is connected to a third ventilation pipe, the third ventilation pipe is connected to a fourth adsorption device, and the fourth adsorption device transports a third negative pressure gas to the interior of the second vacuum box through the third ventilation pipe.

[0019] In some embodiments of the present application, openings are provided on the conveyor belt of the conveying device, and the openings respectively correspond to the first adsorption hole and the second adsorption hole on the first vacuum plate above the first vacuum box and the third adsorption hole on the second vacuum plate above the second vacuum box.

[0020] In some embodiments of the present application, the system further comprises a pressing device, which is arranged to span across the downstream side of the first vacuum box and the second vacuum box, and is used for clamping and conveying the absorbent core after demolding.

[0021] In some embodiments of the present application, the system also includes a crushing device, which is arranged on the upstream side of the feeding device, and the discharge port of the crushing device is connected to the inlet of the feeding device, and the crushing device is configured to crush and defibrate to generate material for preparing the absorbent core.

[0022] The embodiment of the present application provides a system for preparing an ultra-thick absorbent core. During the demolding process of the absorbent core, air is blown by setting a pipe in the demolding area of ​​the partition mechanism arranged inside the forming drum, wherein the size of the air outlet of the pipe along the process direction is at least greater than the width of the absorbent core, so as to increase the cross-sectional area of ​​the pipe to reduce the air flow per unit area, thereby reducing the risk of the absorbent core being blown away by the instantaneous air flow during the demolding process. In addition, in the system provided by the embodiment of the present application, a third vacuum box is arranged inside the first vacuum box of the conveying device, and the first vacuum box and the third vacuum box have mutually independent negative pressure channels, wherein the third vacuum box is designed according to the width of the absorbent core, and provides negative pressure for adsorption and conveying in the corresponding area of ​​the absorbent core, which helps the absorbent core to be instantly demolded from the forming mold, thereby improving the quality of the absorbent core after demolding, and further improving the quality of the corresponding sanitary products. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A schematic diagram of an absorbent article is shown, wherein the absorbent article is prepared by a system for preparing an ultra-thick absorbent core provided by an embodiment of the present application.

[0025] Figure 2 for Figure 1 Cross-sectional view along AA direction.

[0026] Figure 3 A front schematic diagram of a system for preparing an ultra-thick absorbent core provided in an embodiment of the present application.

[0027] Figure 4 A partial side schematic diagram of the system for preparing an ultra-thick absorbent core provided in an embodiment of the present application.

[0028] Figure 5 for Figure 3 Cross-sectional view along direction BB.

[0029] Figure 6 A partial top view schematically showing the system for preparing an ultra-thick absorbent core provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application and are not used to limit the present application. In the present application, unless otherwise stated, the directional words used, such as "up", "down", "left", and "right", generally refer to the upper, lower, left, and right of the device in actual use or working state, specifically the drawing direction in the accompanying drawings.

[0031] The present application embodiment provides a system for preparing an ultra-thick absorbent core, the system comprising:

[0032] A feeding device having a cavity structure;

[0033] The fiber accumulation device is arranged on the downstream side of the feeding device, and the fiber accumulation device includes a forming drum with a drum structure, a plurality of forming molds arranged on the outer periphery of the forming drum, and a partitioning mechanism arranged inside the forming drum; the forming mold rotates synchronously with the forming drum, and the forming mold includes a forming groove matching the absorbent core, the forming groove is connected to the feeding device, and the forming mold is used to adsorb the material for preparing the absorbent core in the forming groove through the conveying path of the feeding device for forming; the partitioning mechanism includes a negative pressure zone, a conveying zone and a demolding zone; the negative pressure zone is connected to the negative pressure device, and the airflow generated by the negative pressure device is connected to the forming groove, and the negative pressure zone is configured so that the material for preparing the absorbent core passes through The conveying path of the feeding device is adsorbed in the forming groove; the conveying area is arranged on the downstream side of the negative pressure area, and the conveying area is configured to convey the absorbent core formed in the forming groove; the demolding area is arranged on the downstream side of the conveying area, and the demolding area is configured to demold the absorbent core formed onto a conveying device, wherein the demolding area is correspondingly arranged on the conveying surface of the conveying device; a pipe is arranged inside the demolding area, and the pipe includes an air inlet and an air outlet, and the air inlet is connected to a blowing device, and the pipe is used to blow out the positive pressure gas generated by the blowing device through the air outlet of the pipe, so as to blow the absorbent core formed in the forming groove onto the conveying surface of the conveying device;

[0034] Wherein, the size of the air outlet of the tube along the flow direction is at least larger than the width of the absorbent core, so as to increase the cross-sectional area of ​​the tube.

[0035] Through the above design, the cross-sectional area of ​​the tube can be increased to reduce the air flow per unit area, thereby reducing the risk of the ultra-thick absorbent core being blown away by the instantaneous air flow during the demoulding process.

[0036] In some embodiments of the present application, the partitioning mechanism also includes a cleaning zone, which is arranged on the downstream side of the demolding zone, and the interior of the cleaning zone is connected to the first adsorption device, and the cleaning zone is configured to clean the material remaining in the molding groove for preparing the absorbent core.

[0037] In some embodiments of the present application, a clamping device is provided on the circumferential outer side of the conveying zone, and the clamping device is used to clamp and convey the absorbent core in the forming groove.

[0038] In some embodiments of the present application, the conveying device includes a first vacuum box having a cavity structure and a second vacuum box having a cavity structure; the first vacuum box is arranged on the upstream side of the second vacuum box, the first vacuum box and the second vacuum box are hinged by an intermediate roller, and each rotates around the intermediate roller to adjust the relative angle between the first vacuum box and the second vacuum box.

[0039] In some embodiments of the present application, the conveying device also includes a conveying roller, a conveying belt and a driving roller; the conveying rollers are respectively arranged on the upstream side of the first vacuum box and the downstream side of the second vacuum box; the conveying belt is annularly wound around the circumferential outer side of the conveying roller and the driving roller, wherein the driving roller is connected to a driving device for providing power for the circular motion of the conveying belt.

[0040] In addition, the researchers found that in the related art, when the ultra-thick absorbent core is demolded onto the conveyor, a continuous sheet will be laid on the bottom of the absorbent core, which means that the ultra-thick absorbent core needs to be demolded from the molding mold to the top of the sheet, and then the sheet and the ultra-thick absorbent core are adsorbed on the conveyor belt through the adsorption holes (or openings) on the conveyor for transportation. The adsorption holes on the conveyor can be evenly arranged according to the size of the sheet and the ultra-thick absorbent core, and the same adsorption device is connected inside the conveyor, and these adsorption devices generate negative pressure gas with the same negative pressure. Since the sheet is only a layer of material, its thickness is only 0.1mm~0.2mm, and the thickness of the ultra-thick absorbent core is 17mm~22mm, therefore, in the direction perpendicular to the process, the ultra-thick absorbent core located in the middle of the width direction of the conveyor belt will be affected by insufficient negative pressure and cannot be completely adsorbed at the moment of demolding in the molding mold, thereby affecting its shedding. If the negative pressure is increased, the negative pressure on the sheets located on both sides of the conveyor belt in the width direction will be too high (too firmly adsorbed), which is not conducive to transportation.

[0041] In order to solve the technical problems existing in the related art, the present application proposes a system for preparing an ultra-thick absorbent core. In the system, the conveying device also includes a third vacuum box and a first vacuum plate; the third vacuum box is arranged inside the first vacuum box; along the process direction, the third vacuum box is arranged to extend from the demoulding area to the downstream side; along the width direction, the third vacuum box is arranged in the middle position of the first vacuum box, wherein the width direction is perpendicular to the process direction; the first vacuum plate is arranged above the first vacuum box; the first vacuum plate is respectively provided with first adsorption holes on both sides along the width direction, and the first vacuum plate is provided with second adsorption holes in the middle position along the width direction; wherein the first adsorption holes match the size of the sheet laid above the conveying device in the width direction, and the second adsorption holes are arranged corresponding to the position of the third vacuum box, and match the size of the absorbent core in the width direction after demolding.

[0042] In some embodiments of the present application, the first vacuum box is connected to the first ventilation duct, the third vacuum box is connected to the second ventilation duct, the first ventilation duct and the second ventilation duct are respectively connected to the second adsorption device and the third adsorption device; the second adsorption device and the third adsorption device respectively transport the first negative pressure gas and the second negative pressure gas to the first vacuum box and the third vacuum box through the first ventilation duct and the second ventilation duct, thereby providing different negative pressures for adsorption to the sheets corresponding to the positions on both sides of the first vacuum plate along the width direction and the demolded absorption core corresponding to the middle position of the first vacuum plate along the width direction; wherein the demolded absorption core is located above the sheet.

[0043] Furthermore, the pressure of the second negative pressure gas provided by the third adsorption device is greater than the pressure of the first negative pressure gas provided by the second adsorption device.

[0044] In addition, in some embodiments of the present application, a second vacuum plate is arranged above the second vacuum box, and a third adsorption hole is arranged on the second vacuum plate, and the third adsorption hole matches the size of the sheet laid above the conveying device and the absorbent core after demolding in the width direction.

[0045] In some embodiments of the present application, the second vacuum box is connected to a third ventilation pipe, the third ventilation pipe is connected to a fourth adsorption device, and the fourth adsorption device transports a third negative pressure gas to the interior of the second vacuum box through the third ventilation pipe.

[0046] In some embodiments of the present application, openings are provided on the conveyor belt of the conveying device, and the openings respectively correspond to the first adsorption hole and the second adsorption hole on the first vacuum plate above the first vacuum box and the third adsorption hole on the second vacuum plate above the second vacuum box.

[0047] In some embodiments of the present application, the system further comprises a pressing device, which is arranged to span across the downstream side of the first vacuum box and the second vacuum box, and is used for clamping and conveying the absorbent core after demolding.

[0048] In some embodiments of the present application, the system also includes a crushing device, which is arranged on the upstream side of the feeding device, and the discharge port of the crushing device is connected to the inlet of the feeding device, and the crushing device is configured to crush and defibrate to generate material for preparing the absorbent core.

[0049] The following is a detailed description of a system for preparing an ultra-thick absorbent core provided in an embodiment of the present application. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts not described in detail in a particular embodiment, please refer to the relevant description of other embodiments.

[0050] An embodiment of the present application provides a system for preparing an ultra-thick absorbent core, which can be used to manufacture absorbent articles. The absorbent articles are absorbent cores with ultra-thick structures. The thickness of such ultra-thick absorbent cores after demolding generally reaches 17 mm to 22 mm (after demolding and before clamping). Figure 1 and Figure 2 An absorbent article S is shown. Figure 1 and Figure 2 In the embodiment shown, the absorbent article S is a sanitary napkin product. This embodiment takes a sanitary napkin product as an example to illustrate the present application. In the thickness direction, the sanitary napkin product includes a liquid-permeable surface layer S1, an absorbent core S2, an absorbent layer S3 and a liquid-impermeable bottom layer S4 arranged in sequence. The layers are bonded together using an adhesive or the like. Figure 2 It is shown in strips. The absorbent core S2 is composed only of fluff pulp fibers S21, and its thickness h is 15 mm. Therefore, the absorbent core S2 is an ultra-thick absorbent core. It is worth noting that, unless otherwise specified, the absorbent core S2 described in the following embodiments refers to an ultra-thick absorbent core. In addition, the system provided in the embodiments of the present application can be processed into an absorbent core S2 (ultra-thick absorbent core) for forming an absorbent article S. The absorbent article S can be a sanitary napkin product, or a diaper, pull-up pants or other products. As long as the absorbent core S2 meets the characteristics of an ultra-thick absorbent core (here 10 mm to 20 mm), it can be processed and manufactured.

[0051] See also Figures 1 to 6As shown, one embodiment of the present application provides a system for preparing an ultra-thick absorbent core, which includes a crushing device 1, a feeding device 2, a fiber accumulation device (not shown in the labeled figure), a clamping device 5, a gluing device 6, a conveying device 7 and a pressing device 8.

[0052] Specifically, Figure 3 and Figure 4 As shown, the crushing device 1 is arranged on the upstream side of the feeding device 2, and the crushing device 1 includes a crushing blade 11, a feed port 12 and a discharge port 13. The crushing blade 11 is used to crush and defibrate the pulp raw material P to generate fluff pulp fibers S21 for preparing the absorbent core S2. The pulp raw material P enters from the feed port 12 of the crushing device 1, and after being crushed by the crushing blade 11, the fluff pulp fibers S21 are formed and sent out from the discharge port 13 of the crushing device 1.

[0053] In this embodiment, the feeding device 2 is also the molding chamber 2. The molding chamber 2 is arranged on the downstream side of the crushing device 1, and its inlet (not shown in the numbered figure) is connected to the discharge port 13 of the crushing device 1, and its outlet (not shown in the numbered figure) is connected to the molding die 4 of the fiber accumulation device. Further, the molding chamber 2 has a negative pressure cavity structure. It should be noted that the negative pressure inside the molding chamber 2 is generated by a negative pressure device (not shown in the figure) connected to the negative pressure zone 31, wherein the negative pressure zone 31 is a partition of the partition mechanism of the fiber accumulation device, and please refer to the detailed description below for details. The fluff pulp fibers S21 received by the molding chamber 2 from the crushing device 1 are adsorbed in the molding die 4 for molding through the conveying path (i.e., the conveying pipeline) of the molding chamber 2 under the action of negative pressure.

[0054] The fiber accumulation device is arranged at the downstream side of the molding cavity 2. The fiber accumulation device comprises a molding drum 3 having a drum structure, a plurality of molding dies 4 arranged on the periphery of the molding drum 3, and a partitioning mechanism arranged inside the molding drum 3.

[0055] In this embodiment, the drum structure of the forming drum 3 is a round drum. There are multiple forming molds 4, which are sequentially arranged outside the circumference of the forming drum 3. The forming mold 4 rotates synchronously with the forming drum 3, and the forming mold 4 includes a forming groove 41 that matches the absorbent core S2. The forming groove 41 is connected to the forming cavity 2, so that the fluff pulp fiber S21 formed by the fiberization of the crushing device 1 is adsorbed in the forming mold 4 through the conveying path of the forming cavity 2 for forming, such as Figure 4 and Figure 5 shown.

[0056] The interior of the forming drum 3 is fixedly provided with a partition mechanism. The partition mechanism includes a negative pressure zone 31, a transfer zone 32, a demoulding zone 33 and a cleaning zone 34. Among them, the negative pressure zone 31 is correspondingly arranged within the range of the forming cavity 2 along the circumferential direction, such as Figure 3The negative pressure zone 31 is connected to a negative pressure device (which generates a negative pressure airflow with a pressure value between -1Kpa and 10Kpa, and the specific pressure value can be freely selected and set according to demand), and the airflow generated by the negative pressure device (not shown in the figure) is connected to the molding tank 41, so that the fluff pulp fiber S21 is adsorbed in the molding tank 41 through the conveying pipeline of the molding cavity 2.

[0057] The conveying area 32 is arranged at the downstream side of the negative pressure area 31. Figure 3 As shown, the conveying area 32 is arranged corresponding to the installation position of the clamping device 5. The conveying area 32 is configured to clamp and convey the absorbent core S2 formed in the forming groove 41.

[0058] The demoulding area 33 is disposed at the downstream side of the conveying area 32, and the demoulding area 33 is correspondingly disposed on the conveying surface of the conveying device 7. Figure 3 The demoulding area 33 is configured to demould the formed absorbent core S2 onto the conveying device 7 .

[0059] The cleaning area 34 is disposed on the downstream side of the demolding area 33, and the cleaning area 34 is connected to the first adsorption device (not shown in the figure). The cleaning area 34 is configured to clean the molding groove 41 corresponding to the area under the negative pressure generated by the first adsorption device to remove (adsorb) the fluff pulp fibers S21 remaining in the molding groove 41, thereby providing a prerequisite for the molding of the absorbent core S2 on the downstream side in the molding groove 41.

[0060] Continue reading Figure 3 As shown, the forming drum 3 is connected to a driving device (not shown in the figure), and under the driving action of the driving device, the forming drum 3 drives the forming mold 4 to rotate in a circle.

[0061] When the forming mold 4 rotates to the negative pressure zone 31 , the fluff pulp fibers S21 are adsorbed in the forming groove 41 of the forming mold 4 .

[0062] When the forming mold 4 rotates to the conveying area 32, the formed absorbent core S2 (composed of fluff pulp fibers S21) in the forming groove 41 is conveyed, wherein normal air pressure is set in the conveying area 32. In order to ensure that the formed absorbent core S2 in the forming groove 41 can be conveyed smoothly, a clamping device 5 is set on the outer side of the circumference of the conveying area 32, such as Figure 3 The clamping device 5 can clamp and convey the absorbent core S2 in the forming groove 41. It should be noted that the structure of the clamping device 5 can be determined according to actual needs, and it only needs to ensure that the fluff pulp fibers S21 of the absorbent core S2 will not fall from the forming groove 41 and are conveyed stably.

[0063] When the molding die 4 rotates to the demolding area 33, a pipe 35 is disposed inside the demolding area 33. The pipe 35 includes an air inlet 351 and an air outlet 352. The air inlet 351 of the pipe 35 is connected to a blowing device (e.g., a blower), wherein the blowing device (not shown in the figure) generates positive pressure gas. The pipe 35 can blow out positive pressure gas through the air outlet 352 of the pipe 35 to blow the absorbent core S2 formed in the molding groove 41 onto the conveying surface of the conveying device 7, thereby completing the demolding process, as shown in FIG. Figure 3 and Figure 5 shown.

[0064] Since the absorbent core S2 is an ultra-thick absorbent core, in order to prevent the risk of being blown away by the instantaneous airflow during the demoulding process, it is necessary to increase the cross-sectional area of ​​the air outlet 352. Specifically, the size of the air outlet 352 of the pipe 35 along the process direction is at least greater than the width of the absorbent core S2. In this way, the cross-sectional area of ​​the pipe 35 can be increased, thereby reducing the airflow per unit area, so as to further reduce the risk of the ultra-thick absorbent core being blown away by the instantaneous airflow during the demoulding process. It is worth noting that those skilled in the art can calculate the cross-sectional area of ​​the pipe 35 according to the gas flow rate and gas flow rate, and combine the width size of the absorbent core S2 to jointly determine the size of the air outlet 352 of the pipe 35. Further, a valve can be set inside the pipe 35 to adjust the size of the positive pressure gas pressure, so as to facilitate the flexible adjustment of the gas pressure required for the demoulding of the absorbent core S2. In addition, the above-mentioned process direction refers to the direction when the equipment is operating normally, that is, the direction in which the absorbent article S on the production line flows from the upstream side to the downstream side, and the width direction is the direction perpendicular to the process direction.

[0065] When the forming mold 4 rotates to the cleaning area 34, some of the remaining fluff pulp fibers S21 in the forming groove 41 can be removed under the adsorption action (i.e., negative pressure action) of the first adsorption device. Since the downstream side of the cleaning area 34 is the negative pressure area 31, the remaining fluff pulp fibers S21 in the forming groove 41 of the forming mold 4 will be cleaned up, providing a good forming environment for the next adsorption forming.

[0066] Continue reading Figure 3 As shown, on the upstream side of the conveying device 7, a continuous sheet W1 is conveyed to the conveying device 7, wherein the sheet W1 can be Figure 2 The liquid permeable surface layer S1 or the absorbent layer S3 in the absorbent article S shown in the figure. Furthermore, in this embodiment, a glue applying device 6 is provided on the upstream side of the conveying device 7 for applying a fixing glue to the sheet W1. In this way, the sheet W1 can be bonded and fixed to the absorbent core S2 after demolding by the fixing glue.

[0067] It should be noted that when the sheet W1 is a liquid-permeable surface layer S1, the liquid-permeable surface layer S1 of the absorbent article S is located at the bottom, and the absorbent core S2 is arranged above the liquid-permeable surface layer S1. Figure 2 Compared with the positional relationship between the liquid-permeable surface layer S1 and the absorbent core S2 of the absorbent article S shown in FIG. 1 , in the conveying operation at this time, the positional relationship between the liquid-permeable surface layer S1 and the absorbent core S2 of the absorbent article S is inverted, and can be turned over through the subsequent workstation process, thereby obtaining Figure 2 The structure of the absorbent article S shown in FIG. When the sheet W1 is the absorbent layer S3, the absorbent layer S3 is located at the bottom and the liquid-permeable surface layer S1 is located above the absorbent layer S3. That is, during the conveying operation at this time, the positional relationship between the absorbent layer S3 and the absorbent core S2 of the absorbent article S is the same as that of the absorbent core S2. Figure 2 The positional relationship between the absorbent layer S3 and the absorbent core S2 of the absorbent article S shown is the same. Therefore, the material of the sheet W1 needs to be determined according to the process layout.

[0068] Since the sheet W1 is laid on the conveyor 7, the absorbent core S2 formed in the molding groove 41 is brought to the sheet W1 on the conveyor 7 under the demolding action of the demolding area 33. The purpose of this arrangement is that since the absorbent core S2 is still fluff pulp fibers S21 at this time, the fluff pulp fibers S21 are easily dispersed if directly transported on the conveyor 7. Furthermore, in this embodiment, the demolding of the absorbent core S2 onto the sheet W1 is intermittent. If there is no traction effect of the continuous sheet W1, the conveying operation will be affected to a certain extent. Of course, in other embodiments, the demolding of the absorbent core S2 onto the sheet W1 can also be continuous. In order to ensure the smooth transportation of the absorbent core S2, it is best to have a sheet W1 under the absorbent core S2.

[0069] Combined with reference Figure 3 and Figure 6 The conveying device 7 includes a first vacuum box 71, a second vacuum box 73, a third vacuum box 72, a first vacuum plate 74, a second vacuum plate 75, a driving roller 76, a conveying roller 77, an intermediate roller 78 and a conveying belt 79, wherein the first vacuum box 71, the second vacuum box 73 and the third vacuum box 72 are all hollow structures.

[0070] Specifically, the first vacuum box 71 is arranged on the upstream side of the second vacuum box 73, and the first vacuum box 71 and the second vacuum box 73 are hinged by an intermediate roller 78. The intermediate roller 78 serves as a fulcrum, and the first vacuum box 71 and the second vacuum box 73 can rotate around the intermediate roller 78 respectively to adjust the relative angle between the first vacuum box 71 and the second vacuum box 73, so as to adjust the gap between the first vacuum box 71 and the forming mold 4 on the periphery of the forming drum 3, so as to be suitable for absorbent cores S2 of different thicknesses. A conveying roller 77 is respectively arranged on the upstream side of the first vacuum box 71 and the downstream side of the second vacuum box 73, and a conveying belt 79 is annularly wound around the outer side of the circumference of the conveying roller 77 and the driving roller 76, wherein the driving roller 76 is connected to a driving device (different from the driving device connected to the forming drum 3 described above) for providing power for the annular movement of the conveying belt 79.

[0071] The third vacuum box 72 is arranged inside the first vacuum box 71. Specifically, along the process direction, the third vacuum box 72 is arranged to extend from the demolding area 33 to the downstream side. Along the width direction, the third vacuum box 72 is arranged in the middle position of the first vacuum box 71, wherein the width direction is a direction perpendicular to the process direction. A first vacuum plate 74 is arranged above the first vacuum box 71, and first adsorption holes 741 are respectively arranged on both sides of the first vacuum plate 74 along the width direction, and a second adsorption hole 742 is arranged in the middle position of the first vacuum plate 74 along the width direction. Further, the first adsorption hole 741 matches the size of the sheet W1 laid on the conveying device 7 along the width direction. The second adsorption hole 742 is arranged corresponding to the position of the third vacuum box 72, and matches the size of the absorbent core S2 after demolding along the width direction.

[0072] Continue reading Figure 6, the first vacuum box 71 is connected to the first ventilation pipe D1, the third vacuum box 72 is connected to the second ventilation pipe D2, the first ventilation pipe D1 is connected to the second adsorption device (not shown in the figure), and the second ventilation pipe D2 is connected to the third adsorption device (not shown in the figure). The second adsorption device and the third adsorption device here can be a fan, or other negative pressure generators that can generate negative pressure. The second adsorption device and the third adsorption device respectively transport the first negative pressure gas and the second negative pressure gas to the first vacuum box 71 and the third vacuum box 72 through the first ventilation pipe D1 and the second ventilation pipe D2, so as to provide different negative pressures for adsorption and transmission to the sheet W1 corresponding to the two sides of the first vacuum plate 74 along the width direction and the absorbent core S2 corresponding to the middle position of the first vacuum plate 74 along the width direction. In other words, the first vacuum box 71 and the third vacuum box 72 have independent negative pressure channels, so as to provide negative pressures for adsorption and transmission to the sheet W1 located at the two sides and the absorbent core S2 located at the middle position. In this way, the negative pressure on the sheet W1 and the negative pressure on the absorbent core S2 can be flexibly adjusted and are independent of each other. In this embodiment, in view of the existing situation in the above-mentioned related art, the third vacuum box 72 is designed according to the width of the absorbent core S2 to provide negative pressure for adsorption and transmission in the corresponding area of ​​the absorbent core S2, which helps the absorbent core S2 to be demolded instantly from the forming mold 4, thereby improving the quality of the absorbent core S2 after demolding, and further improving the quality of the corresponding sanitary products.

[0073] Furthermore, in order to ensure the instant demoulding effect of the absorbent core S2, the pressure of the second negative pressure gas provided by the third adsorption device is greater than the pressure of the first negative pressure gas provided by the second adsorption device. This is because the absorbent core S2 is thicker, while the sheet W1 is very thin (only one layer of material), so the area corresponding to the absorbent core S2 requires a greater gas negative pressure than the area corresponding to the sheet W1 to ensure the smooth demoulding and delivery of the absorbent core S2 after demoulding.

[0074] Continue reading Figure 6 A second vacuum plate 75 is disposed above the second vacuum box 73, and a third adsorption hole 751 is disposed on the second vacuum plate 75. The third adsorption hole 751 matches the size of the sheet W1 and the absorbent core S2 (the absorbent core S2 is located above the sheet W1) in the width direction. The second vacuum box 73 is connected to the third ventilation pipe D3, and the third ventilation pipe D3 is connected to the fourth adsorption device (not shown in the figure), and the fourth adsorption device transports negative pressure gas to the inside of the second vacuum box 73 through the third ventilation pipe D3.

[0075] In one embodiment of the present application, in order to ensure the stable adsorption of the sheet W1 and the absorbent core S2, openings (not shown in the figure) corresponding to the first adsorption hole 741, the second adsorption hole 742 and the third adsorption hole 751 are provided on the conveyor belt 79. These openings can be round holes, waist-shaped holes, etc. The first vacuum box 71 and the third vacuum box 72 are connected to the second adsorption device and the third adsorption device for generating negative pressure gas, so that the negative pressure gas inside the first vacuum box 71 and the third vacuum box 72 is transmitted to the openings of the conveyor belt 79, so that the sheet W1 and the absorbent core S2 are adsorbed to the conveying surface of the conveyor belt 79. The conveyor belt 79 located above the first vacuum plate 74 and the second vacuum plate 75 adsorbs the sheet W1 and the absorbent core S2. At the same time, the conveyor belt 79 is driven by the driving roller 76 to make a circular motion around the outer circumference of the conveying roller 77 and the driving roller 76, thereby transporting the adsorbed sheet W1 and the absorbent core S2 to the downstream side.

[0076] In one embodiment of the present application, Figure 3 As shown, the system also includes a pressing device 8, which is arranged to span the downstream side of the first vacuum box 71 and the second vacuum box 73. The pressing device 8 is used to clamp and convey the absorbent core S2 after demolding, thereby ensuring the compactness of the absorbent core S2.

[0077] The above is a detailed introduction to a system for preparing an ultra-thick absorbent core provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A system for preparing an ultra-thick absorbent core, characterized in that: The system comprises: A feeding device having a cavity structure; The fiber accumulation device is arranged on the downstream side of the feeding device, and the fiber accumulation device includes a forming drum with a drum structure, a plurality of forming molds arranged on the outer periphery of the forming drum, and a partitioning mechanism arranged inside the forming drum; the forming mold rotates synchronously with the forming drum, and the forming mold includes a forming groove matching the absorbent core, the forming groove is connected to the feeding device, and the forming mold is used to adsorb the material for preparing the absorbent core in the forming groove through the conveying path of the feeding device for forming; the partitioning mechanism includes a negative pressure zone, a conveying zone and a demolding zone; the negative pressure zone is connected to the negative pressure device, and the airflow generated by the negative pressure device is connected to the forming groove, and the negative pressure zone is configured so that the material for preparing the absorbent core passes through The conveying path of the feeding device is adsorbed in the forming groove; the conveying area is arranged on the downstream side of the negative pressure area, and the conveying area is configured to convey the absorbent core formed in the forming groove; the demolding area is arranged on the downstream side of the conveying area, and the demolding area is configured to demold the absorbent core formed onto a conveying device, wherein the demolding area is correspondingly arranged on the conveying surface of the conveying device; a pipe is arranged inside the demolding area, and the pipe includes an air inlet and an air outlet, and the air inlet is connected to a blowing device, and the pipe is used to blow out the positive pressure gas generated by the blowing device through the air outlet of the pipe, so as to blow the absorbent core formed in the forming groove onto the conveying surface of the conveying device; Wherein, the size of the air outlet of the tube along the flow direction is at least larger than the width of the absorbent core, so as to increase the cross-sectional area of ​​the tube.

2. The system according to claim 1, characterized in that The partitioning mechanism also includes a cleaning zone, which is arranged on the downstream side of the demoulding zone. The interior of the cleaning zone is connected to the first adsorption device, and the cleaning zone is configured to clean the material remaining in the molding groove for preparing the absorbent core.

3. The system according to claim 1, characterized in that A clamping device is arranged on the circumferential outer side of the conveying zone, and the clamping device is used to clamp and convey the absorbent core in the forming groove.

4. The system according to claim 1, characterized in that The conveying device includes a first vacuum box with a cavity structure and a second vacuum box with a cavity structure; the first vacuum box is arranged on the upstream side of the second vacuum box, the first vacuum box and the second vacuum box are hinged by an intermediate roller, and each rotates around the intermediate roller to adjust the relative angle between the first vacuum box and the second vacuum box.

5. The system according to claim 4, characterized in that The conveying device also includes a conveying roller, a conveying belt and a driving roller; the conveying rollers are respectively arranged on the upstream side of the first vacuum box and the downstream side of the second vacuum box; the conveying belt is annularly wound around the circumferential outer side of the conveying roller and the driving roller, wherein the driving roller is connected to a driving device for providing power for the circular motion of the conveying belt.

6. The system according to claim 4, characterized in that The conveying device further comprises a third vacuum box and a first vacuum plate; the third vacuum box is arranged inside the first vacuum box; along the process direction, the third vacuum box is arranged to extend from the demoulding area to the downstream side; Along the width direction, the third vacuum box is arranged at the middle position of the first vacuum box, wherein the width direction is perpendicular to the process direction; the first vacuum plate is arranged above the first vacuum box; the first vacuum plate is respectively provided with first adsorption holes on both sides along the width direction, and the first vacuum plate is provided with second adsorption holes at the middle position along the width direction; wherein the first adsorption holes match the size of the sheet laid on the conveying device along the width direction, and the second adsorption holes are arranged corresponding to the position of the third vacuum box, and match the size of the absorbent core after demolding along the width direction.

7. The system according to claim 6, characterized in that The first vacuum box is connected to the first ventilation pipe, the third vacuum box is connected to the second ventilation pipe, the first ventilation pipe and the second ventilation pipe are connected to the second adsorption device and the third adsorption device respectively; the second adsorption device and the third adsorption device respectively transport the first negative pressure gas and the second negative pressure gas to the first vacuum box and the third vacuum box through the first ventilation pipe and the second ventilation pipe, thereby providing different negative pressures for adsorption to the sheets corresponding to the positions on both sides of the first vacuum plate along the width direction and the demolded absorption core corresponding to the middle position of the first vacuum plate along the width direction; wherein the demolded absorption core is located above the sheet.

8. The system according to claim 7, characterized in that The pressure of the second negative pressure gas provided by the third adsorption device is greater than the pressure of the first negative pressure gas provided by the second adsorption device.

9. The system according to claim 4, characterized in that A second vacuum plate is arranged above the second vacuum box, and third adsorption holes are arranged on the second vacuum plate. The third adsorption holes match the dimensions of the sheet laid above the conveying device and the absorbent core after demoulding in the width direction.

10. The system according to claim 9, characterized in that The second vacuum box is connected to a third ventilation pipe, the third ventilation pipe is connected to a fourth adsorption device, and the fourth adsorption device transports a third negative pressure gas to the interior of the second vacuum box through the third ventilation pipe.

11. The system according to claim 10, characterized in that The conveyor belt of the conveying device is provided with openings, which respectively correspond to the first adsorption hole and the second adsorption hole on the first vacuum plate above the first vacuum box and the third adsorption hole on the second vacuum plate above the second vacuum box.

12. The system of claim 4, wherein: The system further comprises a pressing device, which is arranged to span the downstream side of the first vacuum box and the second vacuum box, and is used for clamping and conveying the absorbent core after demolding.

13. The system of claim 1, wherein: The system further comprises a pulverizing device, which is arranged at the upstream side of the feeding device, wherein the discharge port of the pulverizing device is connected with the inlet of the feeding device, and the pulverizing device is configured to pulverize and defibrate to generate materials for preparing the absorbent core.

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