CN117137729A

CN117137729A - Processing device and processing method for convex cotton core of sanitary towel

Info

Publication number: CN117137729A
Application number: CN202311359414.9A
Authority: CN
Inventors: 周平; 刘建明
Original assignee: Kawada Hangzhou Sanitary Products Co ltd
Current assignee: Kawada Hangzhou Sanitary Products Co ltd
Priority date: 2023-10-18
Filing date: 2023-10-18
Publication date: 2023-12-01

Abstract

The application relates to a processing device and a processing method of a convex cotton core in a sanitary towel, wherein the processing device comprises a feeding bin and a die wheel which is rotationally arranged, a die shoe is arranged on the circumferential outer surface of the die wheel, a forming net is arranged at the bottom of a die shoe forming cavity, and the middle part of the forming net is inwards recessed to form a recessed part matched with the convex part in the sanitary towel; the inner side of the forming net is provided with a negative pressure cavity for adsorbing the cotton core of the sanitary towel for forming, the feeding bin extends out of the backfilling area along the direction of the die wheel rotation, and the outer side of the die wheel is provided with a brushing wheel close to the tail end of the backfilling area; the feeding bin is provided with a feed back pipe at one side of the backfill area, one end of the feed back pipe is connected with the initial end of the backfill area, and the other end of the feed back pipe is covered at the outer side of the brushing wheel. The application ensures that the cotton core forms a full and effective convex filling thickening effect through the technical means of secondary backfilling.

Description

Processing device and processing method for convex cotton core of sanitary towel

Technical Field

The application relates to the technical field of sanitary towel processing devices, in particular to a processing device and a processing method for a convex cotton core in a sanitary towel.

Background

Most of the absorption cores (i.e. cotton cores) of sanitary napkins in the market are made of fluff pulp mixed polymer SAM (i.e. water absorption beads), the shape of the common cotton core is a plane, and the plane absorption speed and saturated water absorption capacity of the whole absorption core of the sanitary napkin are uniform; in actual use, menstrual blood flows into a local area of the sanitary towel, and is easy to cause side leakage due to untimely absorption and untimely diffusion absorption. Therefore, the convex cotton core of the sanitary towel is generated, and the convex area of the cotton core can absorb menstrual blood and deeply diffuse in time, so that the menstrual blood diffusion on the surface of the sanitary towel is reduced, and the absorption speed and absorption capacity of the menstrual blood in the local area are improved.

The existing cotton core processing device is a die wheel, a plurality of die tiles are arranged on the circumferential outer surface of the die wheel, and a forming net for adsorbing the cotton core is arranged in a die tile forming cavity. As disclosed in the patent publication No. CN105616073a, a die wheel device for producing a convex core body is disclosed, the device adopts an air suction area to adsorb a forming net of a die tile, and cotton core raw materials are continuously accumulated on the forming net to form a cotton core, but as the cotton core raw materials are continuously accumulated, meshes on the forming net can be blocked, negative pressure suction force is gradually reduced, the cotton core raw materials cannot fill the convex forming area of the forming die tile, so that the cotton core can only form a thin and thin hollow shell-shaped cotton core, and a convex effect which is actually effective and filled cannot be formed. Besides, it has the following drawbacks:

1. the suction force of the suction area is not distributed according to the area, and after the forming mesh is blocked, a convex effect cannot be formed. The large area on the right side of the die wheel is not provided with suction force, so that cotton cores can fall off from the die wheel, and the forming effect and the processing efficiency are affected.

2. The cotton core material is added at one time, and the manufactured sanitary towel cotton core is not provided with a bottom cotton layer for wrapping the polymer SAM. This situation can result in 1) the forming mesh being blocked from venting affecting the negative pressure adsorption forming effect; 2) The polymer SAM runs off through the meshes, so that the content ratio of the polymer SAM in the mixed cotton is uncontrollable; 3) In actual use of the sanitary towel, the polymer SAM overflows from the surface of the sanitary towel to contact with the skin to cause adverse effects.

3. The right guide plate is adopted to drain cotton core raw materials to the right side of the die wheel, and then the cotton core raw materials are rolled and tamped by the cotton brushing wheel, so that cotton cores are distributed more uniformly. However, due to the action of gravity, most of the cotton core raw materials must fall vertically, the cotton core raw materials flowing to the right are far less than expected, and the effect on the thickening of the cotton core (especially the filling of the convex and concave parts in the cotton core) is not greatly influenced.

4. The blowing area is not concentrated greatly, and the formed cotton core can not be completely demolded by the effective blowing force, so that the forming effect of the formed cotton core after the actual demolding is affected.

5. After the forming wire is demolded, a device for cleaning the residual substances of the forming wire is not provided, so that the quality of a finished product is easily affected due to impurities when the forming wire is recycled.

6. The mesh openings of the forming wire are consistent, so that the suction force of the forming wire at the convex part cannot be ensured to be larger, and the convex part cannot be ensured to absorb more fluff pulp.

Disclosure of Invention

The application provides a processing device and a processing method for the convex cotton core of the sanitary towel, which solve the problem that the formed mesh is easy to be blocked and the convex effect cannot be formed on the cotton core of the sanitary towel.

On one hand, the processing device for the convex cotton core of the sanitary towel provided by the application adopts the following technical scheme:

the processing device for the convex cotton core in the sanitary towel comprises a feeding bin and a die wheel which is rotatably arranged, wherein a die shoe is arranged on the circumferential outer surface of the die wheel, a forming net is arranged at the bottom of a forming cavity of the die shoe, and the middle part of the forming net is inwards recessed to form a recessed part matched with the convex part in the sanitary towel; the inner side of the forming net is provided with a negative pressure cavity for adsorbing the cotton core of the sanitary towel, the feeding bin extends out of the backfilling area along the rotation direction of the die wheel, and the outer side of the die wheel is provided with a brushing wheel close to the tail end of the backfilling area; one side of the feeding bin at the backfill area is provided with a feed back pipe, one end of the feed back pipe is connected with the initial end of the backfill area, and the other end of the feed back pipe is covered on the outer side of the brushing wheel; the negative pressure cavity comprises a filling negative pressure cavity, a middle convex negative pressure cavity and a backfilling negative pressure cavity, the negative pressures of the filling negative pressure cavity, the middle convex negative pressure cavity and the backfilling negative pressure cavity are sequentially increased, and the filling negative pressure cavity, the middle convex negative pressure cavity and the backfilling negative pressure cavity correspond to the filling area, the concave part and the backfilling area respectively.

Through adopting above-mentioned technical scheme, when the shaping cotton core is through brushing the material wheel, the fine hair thick liquid that is higher than the die tile shaping die cavity on with the shaping cotton core is brushed to pivoted brushing material wheel, and the fine hair thick liquid that brushes material wheel brush is returned to the backfill district to carry out the secondary backfill to make the fine hair thick liquid of backfill district abundant enough, and have longer time and apart from filling, can both realize fine hair thick liquid backfill in being close 45 fan-shaped district, can guarantee to fully fill up the well convex area. And the negative pressure of different areas is different, and the negative pressure of the backfill area is larger than that of the concave part and larger than that of the filling area. Under higher negative pressure, the formed cotton cores are extruded in the backfill area through negative pressure, and fluff pulp is deposited and stacked continuously, so that the cotton cores finally form a full and effective convex effect.

Optionally, the feeding bin is further provided with an adjusting plate movably connected with the feeding bin, the adjusting plate divides the filling region into a bottom cotton region and a mixing region, and a polymer SAM adding pipe is arranged in the mixing region.

By adopting the technical scheme, the bottom cotton area only deposits the fluff pulp without the polymer SAM on the forming wire, and the mixing area deposits the mixed cotton consisting of the polymer SAM and the fluff pulp on the forming wire. Because the bottom cotton area is formed by depositing fluff pulp without polymer SAM, polymer SAM particles are prevented from directly contacting the forming net when the forming net is initially deposited, and the forming net is blocked to prevent ventilation, so that the forming effect is affected; or the loss of the polymer SAM passing through the meshes is avoided, so that the content proportion of the polymer SAM in the mixed cotton is uncontrollable, (the polymer SAM is commonly called as water absorption beads, and the content in the cotton core determines the water absorption speed and the water absorption amount), so that the important water absorption index of the cotton core is unstable; the bottom cotton can also wrap the mixed cotton containing the polymer SAM, and can prevent the polymer SAM from overflowing the surface of the sanitary towel and contacting with the skin to generate adverse effect when the sanitary towel is used.

The adjusting plate can be used as a tool for adjusting the relative sizes of the bottom cotton area and the mixing area, when the adjusting plate controls the bottom cotton area to be enlarged, the amount of fluff pulp entering the bottom cotton area is increased, the thickness of the bottom cotton accumulated on the forming net is thicker, and conversely, the thickness of the bottom cotton can be controlled through the adjusting plate. The polymer SAM adding pipe is used as a feeding channel of the polymer SAM, and the polymer SAM is uniformly scattered and deposited on the bottom cotton after being fully mixed with the fluff pulp in the mixing area.

Optionally, the forming wire is formed with a flat layer portion surrounding the recess portion, and the mesh number of the recess portion is smaller than the mesh number of the flat layer portion.

Through adopting above-mentioned technical scheme, the aperture of depressed part mesh is greater than flat layer portion, and the induced draft of formation is big to the fine hair oar deposition volume of messenger's depressed part is bigger, and thickness can reach the requirement, and the well protruding effect of formation is better.

Optionally, a compacting net belt is arranged below the feed back pipe at the outer side of the die wheel.

By adopting the technical scheme, after the die wheel is transferred from the filling negative pressure area to the normal pressure transition area, the negative pressure is zero at the moment, and the compacted net belt continuously presses and laminates the formed cotton core to rotate along with the die wheel, so that the cotton core is prevented from falling off.

Optionally, an air inlet communicated with the outside is formed in one end of the feed back pipe, which is close to the brushing wheel.

Through adopting above-mentioned technical scheme, can increase the suction in the return pipe, make in the return pipe form effectual return air system.

Optionally, a sealing wool top is arranged between the feeding bin and the die wheel.

By adopting the technical scheme, a closed space is formed between the feeding bin and the die wheel, and the air suction effect of the negative pressure cavity is improved.

Optionally, the mould wheel is kept away from the one end of feeding storehouse its outside and is equipped with drawing of patterns and shifts negative pressure wind scoop and conveyer belt, and the drawing of patterns shifts one side that negative pressure wind scoop is close to the mould wheel and is equipped with the opening, and the conveyer belt is hugged closely the opening that the negative pressure wind scoop was shifted in the drawing of patterns, and the air vent has been seted up on the conveyer belt surface.

By adopting the technical scheme, the formed cotton core formed in the previous working procedure is separated from the formed die tile, and negative pressure is absorbed on the conveyor belt and conveyed out. Specifically, when the formed cotton core is subjected to demolding and transferring of the negative pressure air scoop, the negative pressure of the demolding and transferring of the negative pressure air scoop can form an adsorption effect on the formed cotton core through the vent hole on the conveying belt, so that the formed cotton core is separated from the die shoe and adsorbed on the conveying belt to be conveyed. The conveyer belt can provide the conveying track for shaping cotton core, and the air vent of conveyer belt surface can guarantee that shaping cotton core is by stable absorption on the conveyer belt to can also form the drawing of patterns effect, the drawing of patterns shifts negative pressure wind scoop and can provide stable negative pressure condition, forms the drawing of patterns effect to shaping cotton core.

Optionally, the mould wheel inboard still is equipped with the ordinary pressure storehouse, is provided with the first air duct towards drawing of patterns transfer negative pressure air scoop in the ordinary pressure storehouse, the mould wheel outside is provided with negative pressure dust collection storehouse, and negative pressure dust collection storehouse is located the drawing of patterns and shifts between negative pressure air scoop and the feeding storehouse, still is provided with the second air duct towards negative pressure dust collection storehouse in the ordinary pressure storehouse.

Through adopting above-mentioned technical scheme, can increase the drawing of patterns effect of shaping cotton core at the first gas-blowing pipe in the ordinary pressure storehouse, when shaping cotton core is through the gas blowing mouth of first gas-blowing pipe, first gas-blowing pipe blows to one side of shaping cotton, and the drawing of patterns shifts negative pressure air scoop and can form the adsorption effect to the opposite side of shaping cotton, and both sides combined action is on shaping cotton core, makes shaping cotton core reach the effect of quick drawing of patterns.

After the formed cotton core on the forming wire is separated, residual fluff pulp may remain on the forming wire and form a blockage, which affects the filling of the bottom cotton, so that the residual fluff pulp of the forming wire needs to be removed. Specifically, the second air blowing pipe blows air to the forming net, the negative pressure dust collection bin sucks air to the forming net, and the forces on two sides act on the forming net together, so that residual fluff pulp on the forming net can be removed rapidly, and the influence on the quality of convex cotton cores in sanitary napkins in subsequent production is reduced when the forming net is recycled.

On the other hand, the processing method of the convex cotton core of the sanitary towel provided by the application adopts the following technical scheme:

the processing method of the convex cotton core of the sanitary towel comprises the following steps:

s1, adopting a forming net with a concave part, and adsorbing on the forming net in a negative pressure adsorption mode to form a bottom cotton layer;

s2, continuously depositing mixed cotton consisting of fluff pulp mixed polymer SAM above a bottom cotton layer in a negative pressure adsorption mode to form a cotton core main body, wherein the negative pressure suction force corresponding to the concave part is larger than that of the peripheral area; so that the deposition amount of the mixed cotton in the area is larger than that of the periphery, and a convex effect is formed;

s3, continuously increasing negative pressure suction, continuously depositing and backfilling the cotton cores above the mixed cotton, and compacting the cotton cores to form the cotton cores exceeding the height of the forming cavity;

s4, brushing the mixed cotton exceeding the height of the forming cavity, and conveying the mixed cotton to a working area in the step S3 to form a main raw material source of a backfilled cotton core, so that the thickness of the backfilled cotton core is ensured;

s5, compacting the outer surface of the cotton core treated in the step S4;

s6, demolding the convex cotton core of the formed sanitary towel to a conveying belt for delivery.

By adopting the technical scheme, the method of depositing the bottom cotton and the mixed cotton sequentially is adopted, the method of backfilling for the second time is adopted, and the method of increasing the negative pressure suction force of the concave limit part and the backfill area is adopted, so that the quality of the convex cotton core is greatly improved, and a full and effective convex effect is formed.

Optionally, after step S6, the method further includes the following steps:

s7, cleaning impurities such as residual fluff pulp attached to the forming net through compressed air, and collecting and processing the impurities to enable the forming net to be recycled.

By adopting the scheme, the forming net can be continuously recycled, and the quality of the convex cotton core in the sanitary towel produced continuously is ensured.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the setting of feed back pipe and backfill district makes the backfill district have enough raw materials, enough time, sufficient distance to backfill, makes the die shoe take shape the die cavity and does not fill up the part in the filling district, obtains abundant filling until the cotton core height surpasses the die shoe and takes shape the die cavity, has guaranteed simultaneously that the brush material wheel can brush more fine hair thick liquid and be used for backfilling again to last to let the shaping cotton core form full effectual well convex effect.

2. The suction force of the backfill area is larger than that of the forming net concave part and larger than that of the filling area, so that continuous deposition of mixed cotton is ensured, and a full and effective convex effect is finally formed.

3. The mesh diameter of the concave part of the forming net is larger than that of other parts, so that continuous deposition of mixed cotton is ensured, and a full and effective convex effect is finally formed.

4. The separation setting in cotton district of end and mixing district has not only guaranteed the well protruding effect, has still improved the adsorption performance of well protruding cotton core, does not let polymer SAM contact the human body simultaneously, and is more sanitary, ensures human health.

5. The negative pressure dust collection bin is arranged, so that the forming net can be recycled, and the quality of the formed convex cotton core can be ensured under the condition of continuous production.

Drawings

FIG. 1 is a schematic overall structure of an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of the overall structure of an embodiment of the present application;

FIG. 3 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 4 is a schematic top view of a die shoe according to an embodiment of the application;

FIG. 5 is an exploded view of a die shoe and forming wire structure of an embodiment of the present application;

FIG. 6 is a schematic diagram showing the comparison of the molding effect of the present application with the prior art;

fig. 7 is a schematic representation of a cotton core of the present application in comparison to a prior art cotton core.

Reference numerals illustrate: 1. a frame; 2. a feeding bin; 21. an adjusting plate; 22. a bottom cotton area; 23. a mixing zone; 24. a diffusion region; 241. filling the region; 242. backfilling the area; 25. a polymer SAM addition tube; 26. brushing a material area; 27. an air inlet; 271. a damper; 28. sealing the wool tops; 3. a die wheel; 31. a die shoe; 32. forming a net; 321. a support structure; 322. a combination net; 3221. a recessed portion; 3222. a flat layer portion; 33. a grille; 34. a partition plate; 35. filling a negative pressure cavity; 351. filling a negative pressure cavity air suction pipeline; 36. backfilling the negative pressure cavity; 361. backfilling a negative pressure cavity air suction pipeline; 37. a normal pressure bin; 38. a convex negative pressure cavity; 381. a convex negative pressure cavity air suction pipeline; 39. a first air blowing pipe; 4. a demolding assembly; 41. a conveyor belt; 42. demolding and transferring a negative pressure wind scoop; 43. an active traction roller; 44. a tension roller; 45. a tensioning cylinder; 5. a negative pressure dust collection bin; 51. a second air blowing pipe; 6. a feed back pipe; 61. brushing a material wheel; 7. compacting the mesh belt; 71. and (5) rotating the roller.

Detailed Description

In the description of the present application, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.

The present application is described in further detail below with reference to fig. 1-5.

The embodiment of the application discloses a processing device for convex cotton cores in sanitary towels, which comprises a frame 1, a feeding bin 2, a die wheel 3, a demoulding assembly 4 and a negative pressure dust collection bin 5, wherein the die wheel 3 is rotationally connected with the frame 1, the frame 1 is provided with a driving piece for driving the die wheel 3 to rotate, the driving piece is a servo motor, the die wheel 3 rotates clockwise in the drawing, the feeding bin 2 is vertically fixed on the frame 1, one end of the feeding bin 2 is connected with a pulverizer, the other end of the feeding bin 2 is connected with the circumferential outer surface of the die wheel 3, and a sealing wool top 28 is arranged between the feeding bin 2 and the die wheel 3 to enclose a sealing space.

Referring to fig. 2 and 3, a diffusion area 24 is formed at one side of the feeding bin 2 facing the die wheel 3, the diffusion area 24 is in an inverted horn shape, a filling area 241 and a backfill area 242 are sequentially arranged in the diffusion area 24 along the rotation direction of the die wheel 3, an adjusting plate 21 is arranged in the feeding bin 2, and the adjusting plate 21 separates the filling area 241 to form a bottom cotton area 22 and a mixing area 23. The feeding bin 2 is movably connected with the adjusting plate 21, the specific adjusting plate 21 and the feeding bin 2 can be in rotary connection or sliding connection, when the adjusting plate 21 is in rotary connection with the feeding bin 2, the upper end of the adjusting plate 21 is in rotary connection with the feeding bin 2, and the space area of the cotton bottom area 22 is controlled by the rotary adjusting plate 21; when the adjusting plate 21 is in sliding connection with the feeding bin 2, the sliding adjusting plate 21 controls the size of the space area of the bottom cotton area 22. The larger the region 22 of base cotton, the thicker the base cotton, and vice versa. The mixing area 23 is provided with a transparent observation window, the feeding bin 2 is communicated with a polymer SAM adding pipe 25, the outlet of the polymer SAM adding pipe 25 is arranged in the mixing area 23, and the polymer SAM adding pipe 25 can provide a channel for the polymer SAM (water absorbent beads) to enter the mixing area 23. The backfill area 242 gradually gathers towards the die wheel 3 along the rotation direction of the die wheel 3, and a brushing area 26 is formed on one side of the backfill area 242 away from the filling area 241. One side of the feeding bin 2 is provided with a feed back pipe 6, the feed back pipe 6 is fixed on the frame 1, one end of the feed back pipe 6 is communicated with the brushing area 26 and is communicated with outside air, an air inlet 27 is formed, the other end of the feed back pipe 6 is communicated with the starting end of the backfill area 242, the starting end is the flaring starting position of the diffusion area 24, an air inlet 27 of the feed back pipe 6 is provided with an air damper 271 in a sliding mode, and the air damper 271 is used for adjusting the size of the air inlet 27. The feed back pipe 6 is close to the air inlet 27 and is rotationally connected with a brushing wheel 61, at least one brushing wheel 61 is arranged, the brushing wheel 61 is propped against the side wall of the periphery of the die wheel 3, the brushing wheel 61 can be a brush or a knife wheel, the brush can be a nylon brush, and the blade of the knife wheel is inclined at a certain angle.

Referring to fig. 2, 4 and 5, a plurality of die shoes 31 are arranged on the circumferential side surface of the die wheel 3, the die shoes 31 are mutually abutted and surround the die wheel 3 for one circle, the number of the die shoes 31 is 12, and the die shoes 31 and the die wheel 3 are detachably connected through fasteners. The middle part of the die shoe 31 is provided with a forming cavity, the bottom of the forming cavity of the die shoe 31 is provided with a forming net 32, the forming net 32 is provided with two layers, namely a supporting structure 321 and a combined net 322, the combined net 322 is provided with a concave part 3221 (coarse net) and a flat layer part 3222 (fine net), the concave part 3221 is positioned in the middle, the concave part 3221 is concave towards the center direction of the die wheel 3, the flat layer part 3222 surrounds the concave part 3221, the mesh number of the concave part 3221 is smaller than that of the flat layer part 3222, the sample number of the concave part 3221 is 40 meshes, and the sample number of the flat layer part 3222 is 60 meshes; in actual use, the suction force of the matched forming fan can be properly adjusted according to the diameter of the die wheel, the area and the gram weight of the core body. The mesh of the concave portion 3221 is larger than that of the flat layer portion 3222, so that the air suction amount is larger, and the convex effect of the formed cotton core is better; the reinforcing support structure 321 under the forming wire 32 can increase the rigidity of the forming wire 32 to maintain the required shape and the forming effect of the cotton core while ensuring the air intake.

Referring to fig. 2, the mold wheel 3 is further fixedly provided with a grille 33, and one side of the molding net 32 near the center of the mold wheel 3 is abutted against the grille 33, so that the grille 33 ensures the air intake, and simultaneously, the stability and the structural strength of the molding net 32 can be increased, and the deformation effect of the molding net 32 can be reduced.

Referring to fig. 2 and 3, the inside of the die wheel 3 is hollow and divided into a filling negative pressure cavity 35 and a backfilling negative pressure cavity 36 by a partition 34, the inside of the die wheel 3 is divided into areas with different pressures, and the partition 34 is stationary when the die wheel 3 rotates, i.e. the positions of the negative pressure cavities are unchanged. The filling negative pressure cavity 35 is externally connected with a filling negative pressure cavity air suction pipeline 351, and an air inlet of the filling negative pressure cavity 35 corresponds to the lower end of the feeding bin 2. The inside of the filling negative pressure cavity 35 is also provided with a convex negative pressure cavity 38, an air inlet of the convex negative pressure cavity 38 corresponds to the concave part 3221, and the convex negative pressure cavity 38 is externally connected with a convex negative pressure cavity air suction pipeline 381. The air inlet of the backfill negative pressure cavity 36 corresponds to the backfill area 242 and the brushing area 26, and the backfill negative pressure cavity 36 is externally connected with a backfill negative pressure cavity air suction pipeline 361. The negative pressure in the filling negative pressure chamber 35, the convex negative pressure chamber 38, and the backfill negative pressure chamber 36 increases in order. The negative pressure in the convex negative pressure cavity 38 is larger than the negative pressure in the filling negative pressure cavity 35, so that the convex effect is better, the negative pressure in the backfill negative pressure cavity 36 is larger than the negative pressure in the convex negative pressure cavity 38 and the filling negative pressure cavity 35, and the cotton core main body can deposit more mixed cotton to fully fill the convex concave area of the cotton core and form a certain thickness. The backfill suction chamber 36 also allows the return tube 6 to form an air circulation path for the brushed excess fluff pulp to pass through the return tube 6 and into the backfill zone 242.

Referring to fig. 2 and 3, a compacting net belt 7 is disposed below the feed back pipe 6 outside the die wheel 3, the compacting net belt 7 is abutted against the die shoe 31, four rotating rollers 71 are wound around the compacting net belt 7, and the active rotating rollers 71 are driven to rotate by a driving member. When the formed cotton core passes through the compaction net belt 7, the formed cotton core is further compacted, fluff pulp rebound in the formed cotton core is reduced, the forming effect of the formed cotton core is improved, and meanwhile, the formed cotton core can be prevented from abnormally falling off from the die wheel 3.

Referring to fig. 2 and 3, the demolding assembly 4 is located below the mold wheel 3, the demolding assembly 4 comprises a conveying belt 41, a demolding transferring negative pressure wind bucket 42, an active traction roller 43 and a tensioning roller 44, the conveying belt 41 is wound on the demolding transferring negative pressure wind bucket 42, the active traction roller 43 and the tensioning roller 44, an opening is formed in one side, close to the mold wheel 3, of the demolding transferring negative pressure wind bucket 42, and a negative pressure air suction pipe is externally connected to the demolding transferring negative pressure wind bucket 42. The surface of the conveyor belt 41 is provided with vent holes, one side of the conveyor belt 41 is clung to the opening of the demoulding and transferring negative pressure wind hopper 42, and the other side is propped against the die shoe 31. The driving traction roller 43 is driven to rotate by a driving piece, the tensioning roller 44 is rotationally connected with a tensioning cylinder 45, the tensioning cylinder 45 is arranged on the frame 1, and the tensioning cylinder 45 pushes the tensioning roller 44 to move different positions so as to adjust the tensioning of the conveyor belt 41. The partition 34 also separates the inside of the die wheel 3 to form a normal pressure bin 37, a first air blowing pipe 39 is arranged in the normal pressure bin 37, and the air blowing opening of the first air blowing pipe 39 faces the demoulding assembly 4. The caliber of the air blowing opening can control the blowing pressure and flow to ensure demoulding but not blow off the formed cotton core. When the formed cotton core passes through the demoulding assembly 4, the first air blowing pipe 39 blows air to the formed cotton core, and the demoulding transfer negative pressure air hopper 42 sucks air to the formed cotton core through the vent hole formed by the conveying belt 41, so that the two-way action is realized, and a demoulding effect on the formed cotton core is formed.

Referring to fig. 2 and 3, a negative pressure dust collection bin 5 is located between the demoulding assembly 4 and the feeding bin 2, and the negative pressure dust collection bin 5 is connected with a negative pressure air suction pipe which sucks air from the negative pressure dust collection bin 5 and forms a negative pressure effect. Two second air blowing pipes 51 are arranged in the normal pressure bin 37, and air blowing ports of the second air blowing pipes 51 face the negative pressure dust collection bin 5. The second air blowing pipe 51 blows off impurities such as fluff pulp remaining on the die shoe 31, and then the negative pressure dust collection bin 5 sucks out the impurities such as fluff pulp dropped.

The implementation principle of the embodiment of the application is as follows:

1) The feeding bin 2 is fixed, the die wheel 3 carries the die shoe 31 and the forming net 32 to rotate relatively, fluff pulp in the feeding bin 2 is split by the adjusting plate 21 and is adsorbed by negative pressure, bottom cotton without polymer SAM is formed on the forming net passing through the range of the bottom cotton area 22, and the thickness of the bottom cotton can be adjusted by changing the position of the adjusting plate 21 and the suction force filling the negative pressure cavity 35.

2) While passing through the mixing zone 23, the forming wire 32 mixes the fluff pulp with the polymer SAM fed through the polymer SAM feed line 25 in a certain ratio to form a mixed cotton, which is deposited on the base cotton.

3) In the above two steps, since the negative pressure of the convex negative pressure chamber 38 is larger than that of the filling negative pressure chamber 35 and the mesh diameter of the forming wire recess 3221 is larger than that of the periphery, the deposition amount of the recess 3221 is significantly higher than that of the periphery, and a preliminary convex effect is formed.

4) While passing through the backfill zone 242, the forming wire 32 continues to deposit and backfill and compact the cotton core in the backfill zone 242 by the negative pressure chamber 36. The negative pressure cavity also causes a pressure difference at the two ends of the feed back pipe 6, and air enters the starting end of the backfill area 242 through the air inlet 27 of the feed back pipe 6.

5) When passing through the brushing wheel 61, the forming net 32 brushes up the fluff pulp higher than the die shoe forming cavity by the brushing wheel 61, and returns to the backfill area 242 again through the material return pipe 6 to be continuously replenished as backfill material.

6) The forming wire 32 is compacted by the compacting wire 7 when passing through the compacting wire 7 with the formed cotton core, thereby increasing the stability of the formed cotton core and preventing the formed cotton core from loosening and falling off.

7) When the molding net 32 carries the molding cotton core through the first air blowing pipe 39 below the mold wheel 3, the first air blowing pipe 39 blows air to the molding cotton core to separate the molding cotton core from the mold shoe 31, and the demolding transfer negative pressure air hopper 42 adsorbs the molding cotton core to the conveyor belt 41 for conveying.

8) When the forming wire 32 passes through the second air blowing pipe 51, impurities such as fluff pulp remaining thereon are blown into the negative pressure dust collection bin 5, and are outputted through a pipe to be intensively processed.

On the other hand, the embodiment of the application also discloses a processing method of the convex cotton core in the sanitary towel, which comprises the following steps:

a processing method of a convex cotton core of a sanitary towel comprises the following steps:

s1, adopting a forming net 32 with a concave part 3221, and adsorbing on the forming net 32 in a negative pressure adsorption mode to form a bottom cotton layer;

s2, continuously depositing mixed cotton consisting of fluff pulp mixed polymer SAM above a bottom cotton layer in a negative pressure adsorption mode to form a cotton core main body, wherein the negative pressure suction force corresponding to the concave part 3221 is larger than that of a peripheral area; so that the deposition amount of the mixed cotton in the area is larger than that of the periphery, and a convex effect is formed;

s5, compacting the outer surface of the cotton core treated in the step S4;

S7, cleaning impurities such as residual fluff pulp attached to the forming wire 32 by compressed air, and collecting and processing the impurities to recycle the forming wire 32.

The method is not necessarily applied to the mold wheel 3, and is also applicable to the environments such as horizontal continuous production lines and the like.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims

1. The processing device for the convex cotton core in the sanitary towel comprises a feeding bin (2) and a die wheel (3) which is rotatably arranged, wherein a die shoe (31) is arranged on the circumferential outer surface of the die wheel (3), a forming net (32) is arranged at the bottom of a forming cavity of the die shoe (31), and the middle part of the forming net (32) is inwards recessed to form a recessed part (3221) matched with the convex part in the sanitary towel; the inside of the forming net (32) is provided with a negative pressure cavity for adsorbing the cotton core of the sanitary towel for forming, and is characterized in that: the feeding bin (2) extends out of a backfill area (242) along the rotation direction of the die wheel (3), and a brushing wheel (61) close to the tail end of the backfill area (242) is arranged on the outer side of the die wheel (3); one side of the backfilling area (242) of the feeding bin (2) is provided with a feed back pipe (6), one end of the feed back pipe (6) is connected with the initial end of the backfilling area (242), and the other end is covered on the outer side of the brushing wheel (61); the negative pressure cavity comprises a filling negative pressure cavity (35), a middle convex negative pressure cavity (38) and a backfilling negative pressure cavity (36), negative pressures of the filling negative pressure cavity (35), the middle convex negative pressure cavity (38) and the backfilling negative pressure cavity (36) are sequentially increased, and the filling negative pressure cavity, the middle convex negative pressure cavity (38) and the backfilling negative pressure cavity are respectively corresponding to the filling area (241), the concave part (3221) and the backfilling area (242).

2. A sanitary napkin convex cotton core processing apparatus according to claim 1, wherein: the feeding bin (2) is further provided with an adjusting plate (21) which is movably connected, the filling area (241) is divided into a bottom cotton area (22) and a mixing area (23) by the adjusting plate (21), and a macromolecule SAM adding pipe (25) is arranged in the mixing area (23).

3. A sanitary napkin convex cotton core processing apparatus according to claim 1, wherein: the forming wire (32) is formed with a flat layer portion (3222) surrounding the recess portion (3221), and the mesh number of the recess portion (3221) is smaller than that of the flat layer portion (3222).

4. A sanitary napkin convex cotton core processing apparatus according to claim 1, wherein: the outside of the die wheel (3) is provided with a compaction net belt (7) below the feed back pipe (6).

5. A sanitary napkin convex cotton core processing apparatus according to claim 1, wherein: one end of the feed back pipe (6) close to the brushing wheel (61) is provided with an air inlet (27) communicated with the outside.

6. A sanitary napkin convex cotton core processing apparatus according to claim 1, wherein: a sealing wool top (28) is arranged between the feeding bin (2) and the die wheel (3).

7. A sanitary napkin convex cotton core processing apparatus according to claim 1, wherein: the mould wheel (3) is kept away from the one end of feeding storehouse (2) its outside is equipped with drawing of patterns and shifts negative pressure wind scoop (42) and conveyer belt (41), the drawing of patterns shifts one side that negative pressure wind scoop (42) is close to mould wheel (3) and is equipped with the opening, conveyer belt (41) are hugged closely the opening that drawing of patterns shifted negative pressure wind scoop (42), just the air vent has been seted up on conveyer belt (41) surface.

8. The device for processing a convex cotton core in a sanitary napkin according to claim 7, wherein: the mold wheel (3) is characterized in that a normal pressure bin (37) is further arranged on the inner side of the mold wheel (3), a first air blowing pipe (39) facing the demolding transferring negative pressure air hopper (42) is arranged in the normal pressure bin (37), a negative pressure dust collecting bin (5) is arranged on the outer side of the mold wheel (3), the negative pressure dust collecting bin (5) is located between the demolding transferring negative pressure air hopper (42) and the feeding bin (2), and a second air blowing pipe (51) facing the negative pressure dust collecting bin (5) is further arranged in the normal pressure bin (37).

9. A processing method of a convex cotton core of a sanitary towel is characterized in that: the method comprises the following steps:

s1, adopting a forming net (32) with a concave part (3221), and adsorbing on the forming net (32) in a negative pressure adsorption mode to form a bottom cotton layer;

s2, continuously depositing mixed cotton consisting of fluff pulp mixed polymer SAM above a bottom cotton layer in a negative pressure adsorption mode to form a cotton core main body, wherein the negative pressure suction force corresponding to the concave part (3221) is larger than that of the peripheral area; so that the deposition amount of the mixed cotton in the area is larger than that of the periphery, and a convex effect is formed;

s5, compacting the outer surface of the cotton core treated in the step S4;

10. The method of claim 9, further comprising the step of, after step S6:

s7, cleaning impurities such as residual fluff pulp attached to the forming wire (32) through compressed air, and collecting and processing the impurities to enable the forming wire (32) to be recycled.