Composite roller and core preparation composite device

Abstract

The utility model relates to the field of hygienic product processing, in particular to a composite roller and core preparation composite device which comprises a roller body, a plurality of forming grooves are formed in the circumferential side face of the roller body, and the forming grooves in the roller body are sequentially distributed around the circumferential side face of the roller body. A cylinder cavity is formed in the roller body, and air holes used for being communicated with the cylinder cavity are formed in the bottoms of the forming grooves. By means of the composite roller and the core preparation composite device, dumbbell-shaped cores can be machined, meanwhile, waste is reduced, and material waste is reduced.

Description

Technical Field

[0001] The utility model relates to the field of hygiene product processing, and particularly relates to a composite roller and a core body preparation composite device. Background Art

[0002] There are many kinds of hygiene products, such as diapers, pull-up pants, night-time pants, etc. The core body in hygiene products is the key part for absorbing liquid. After body fluids are discharged from the body, they seep through the surface layer of the hygiene product to the core body, and the core body absorbs and holds the liquid. Currently, most core bodies are designed and cut to be similar to a dumbbell shape (the width at both ends of the core body is greater than the width in the middle), aiming to wrap the buttocks at the back end of the body and part of the front end of the body. Especially when used by adults, compared with the traditional straight strip type, the dumbbell shape can more effectively prevent liquid leakage in the buttocks area and make users feel more at ease.

[0003] Currently, the core body of hygiene products is composed of a composite of fibers and water-absorbing resin. The fibers and the water-absorbing resin are intertwined, and the fibers wrap the water-absorbing resin. The function of the fibers is to make the surface of the core body soft and improve the comfort of the contact between the hygiene product and the skin. The main function of the water-absorbing resin is to absorb and store liquid.

[0004] However, the current preparation method of the core body is as follows: First, the fibers and the water-absorbing resin are compounded together to form a square structure, and then cut to cut out a dumbbell-shaped core body. But in this way, up to 40% of the surrounding waste materials are generated. These waste materials contain a mixture of different types of hot-melt adhesives, different types of superabsorbent polymers (SAP), and various fibers (such as 6D×51mm composite fibers, 2D×38mm composite fibers, 4D×51mm composite fibers, 7D×64mm hollow spiral fibers). Since these components are compounded and mixed together in these waste materials, these mixture waste materials cannot be reused, resulting in huge waste. The cost of wasted materials will be evenly spread to the selling price of hygiene products, thus bringing an unnecessary purchase price threshold to consumers.

[0005] At the same time, in the prior art, when cutting the core body, the cutting tool has high hardness and poor toughness. Especially for expensive cemented carbide tools, although the cutting efficiency is high, the brittleness is greater. The core body contains hard granular SAP, and when the tool cuts at high speed, it is extremely easy to cause damage such as chipping. This will not only result in waste of the cost of the tool itself, but also cause a decrease in production efficiency due to tool replacement. Moreover, during the cutting process, it will also cause the hot-melt adhesive and various fibers of different materials to adhere to the cutting edge of the tool, resulting in poor cutting and greatly reducing the production efficiency. Summary of the Utility Model

[0006] The utility model aims to provide a composite roller and a core body preparation composite device. The forming grooves on the roller body of the composite roller can shape the mixed material to process and form a core body with a certain shape, eliminating the need for cutting, reducing the generation of waste during the preparation process, and reducing material waste.

[0007] To achieve the above object, the utility model adopts the following technical scheme: A composite roller includes a roller body, and a plurality of forming grooves are provided on the circumferential side surface of the roller body, and the plurality of forming grooves on the roller body are sequentially distributed around the circumferential side surface of the roller body;

[0008] A cylinder cavity is provided inside the roller body, and air holes for communicating with the cylinder cavity are provided at the bottoms of the forming grooves.

[0009] In this application, the composite roller is a mold for core body forming. During forming, the mixed material is added into the forming grooves, and by sucking negative pressure into the cylinder cavity, the negative pressure in the cylinder cavity acts on the forming grooves through the air holes, so that the mixed material (the mixed material includes fibers and water-absorbing resin, and the fibers and water-absorbing resin are evenly mixed) in the forming grooves is formed into a specific shape, such as a dumbbell shape, so as to be able to form a core body with a specific shape.

[0010] There is negative pressure in the forming grooves in this application, and the material is shaped in the forming grooves under the action of negative pressure adsorption, thus realizing negative pressure shaping. The negative pressure shaping in this application means that the intricate fibers are intertwined with each other under the action of negative pressure adsorption and are not easy to disperse. Since the forming grooves are of a specific shape, the fibers and water-absorbing resin automatically form the corresponding shape after shaping.

[0011] There are multiple forming grooves on the roller body in this application. By rotating the roller body, different forming grooves can pass through the feeding area of the core body preparation composite device, realizing the sequential feeding of the material and the sequential negative pressure forming of the material, and enabling the continuous batch production and manufacturing of products with a specific shape, and ensuring the production efficiency.

[0012] Preferably, as an improvement, a partition is provided in the cylinder cavity, the partition is relatively rotatably arranged with the roller body, the partition divides the cylinder cavity into a negative pressure cavity and a non-negative pressure area, and the air holes are communicated with the negative pressure cavity when they are opposite.

[0013] Thus, when the roller body rotates in this application, when the air holes rotate to the negative pressure cavity, the air holes are communicated with the negative pressure cavity, and the forming grooves perform negative pressure shaping on the core body. When the roller body rotates to the non-negative pressure area, the air holes are no longer communicated with the negative pressure cavity, and the negative pressure in the forming grooves disappears, which is beneficial to the product in the forming grooves to fall off.

[0014] Preferably, as an improvement, the forming grooves are dumbbell-shaped, and the volumes of both ends of the forming grooves are the same. Thus, the volumes of both ends of the prepared core body are the same. ·

[0015] Preferably, as an improvement, the forming groove is dumbbell-shaped, and the volume of one end of the forming groove is larger than that of the other end. Thus, one end of the prepared core body is large and the other end is small. The large end of the core body can be used to wrap the buttocks, improving the liquid absorption effect on the buttocks and preventing liquid from leaking backward from the sanitary product.

[0016] Preferably, as an improvement, there are multiple groups of forming grooves. Multiple forming grooves in each circle form a group, and multiple groups of forming grooves are arranged along the axial direction of the roller body.

[0017] Thus, by setting multiple groups of forming grooves, the number of forming grooves on the roller body is greatly increased, and the composite efficiency of the core body can be greatly improved.

[0018] Preferably, as an improvement, a closing cover for blocking the cylinder cavity is rotatably provided at the end of the roller body, and a negative pressure pipe is connected to the closing cover, and the negative pressure pipe communicates with the negative pressure cavity.

[0019] Thus, the closing cover is used to block the end of the cylinder cavity, and at the same time, the closing cover can also support the roller body. The negative pressure pipe is connected to the negative pressure machine, and the negative pressure machine acts on the negative pressure cavity through the negative pressure pipe, so that a negative pressure is generated in the negative pressure cavity.

[0020] Preferably, as an improvement, a positive pressure cavity is provided in the non-negative pressure area, and a positive pressure pipe is connected to the closing cover, and the positive pressure pipe communicates with the positive pressure cavity.

[0021] Thus, when the core body in the forming groove is shaped, the forming groove moves to the non-negative pressure area, the positive pressure cavity communicates with the air holes, and the positive pressure pipe communicates with the fan, so that a positive pressure is generated in the positive pressure cavity, which is beneficial to the shaped product in the forming groove to fall out of the forming groove.

[0022] Preferably, as an improvement, the outer diameter of the roller body is 0.5 - 1 m; the depth of the forming groove is 1 - 5 mm.

[0023] To achieve the above object, the present utility model adopts the following technical solution: a core body preparation and composite device, including a frame and any one of the above composite rollers, the roller body is rotatably arranged on the frame, and a driving mechanism for driving the roller body to rotate is arranged on the frame.

[0024] Preferably, as an improvement, a sleeve is fixedly arranged on the frame, and the sleeve is sleeved outside the roller body. Thus, through the sleeve, the roller body can be supported, and the forming grooves of the roller body can be shielded and protected to prevent the forming grooves from being exposed.

[0025] The solution of the present application has the following beneficial effects:

[0026] The forming groove in this application has a forming function. The mixed material in the forming groove is adsorbed in the forming groove under the action of negative pressure for negative pressure shaping, so as to directly form a structure with a specific shape. Under the action of negative pressure, the fibers are firmly intertwined together, realizing the composite of fibers and water-absorbing resin. Additionally, hot air shaping can be combined to make the shaping effect of the product better and the shaped structure more stable. After the fibers and water-absorbing resin are shaped and combined, a product with a specific shape is directly formed, and there is no need for further cutting and forming subsequently. Compared with the core body cut into corresponding shapes in the prior art, the generation of waste is greatly reduced, and the waste of materials is reduced.

[0027] At the same time, since the core body does not need to be cut during formation, the situation of tool damage can be avoided, the waste of tools is reduced, and the reduction in production efficiency caused by tool replacement is avoided. The production efficiency is improved compared with the prior art. At the same time, since there is no need for tool cutting, the situation of fibers sticking to the tool blade will not occur, which is conducive to improving production efficiency.

[0028] During the negative pressure adsorption process in this application, the stability of the material in the forming groove can also be improved. During the rotation of the roller body, the material in the forming groove is not easily detached and dropped from the forming groove under the action of negative pressure adsorption. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic structural diagram of a core body preparation and composite device (with hot air shaping function).

[0030] Figure 2 It is Figure 1 the left view cross-sectional view (excluding the conveyor belt).

[0031] Figure 3 It is a schematic diagram of a dumbbell-shaped forming groove.

[0032] Figure 4 It is a schematic structural diagram of a core body preparation and composite device (without hot air shaping function) in another embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following is a further detailed description through specific embodiments:

[0034] The reference numerals in the accompanying drawings of the specification include: feed pipe 1, roller body 3, forming groove 4, air hole 5, negative pressure chamber 6, partition part 10, conveyor belt 14, closing cover 15, negative pressure pipe 16, discharge hole 20, positive pressure chamber 21, positive pressure pipe 23, sleeve 25, rotating support roller 26, first hot air pipe 27, second hot air pipe 28.

[0035] Embodiment 1

[0036] Basically as shown in the attached Figures 1 - 3As shown: A core preparation composite device includes a frame (not shown in the figure) and a composite roller. The composite roller in this embodiment includes a roller body 3. This device includes a feeding area, a hot air setting area, and a discharging area.

[0037] In this embodiment, the outer diameter (diameter) of the roller body 3 is 0.5 - 1 m. The roller body 3 is mounted on the frame.

[0038] A plurality of forming grooves 4 are provided on the circumferential side surface of the roller body 3. The depth of the forming groove 4 is 0.8 - 5 mm, specifically it can be 2 mm. Figure 3 As shown, the forming groove 4 is dumbbell-shaped (the dumbbell shape means that the width at both ends of the forming groove 4 is greater than the width in the middle of the forming groove 4. The ends of the forming groove 4 are the heads, and the volumes of the heads at both ends of the forming groove 4 are equal. In other embodiments, the volumes of the heads at both ends of the forming groove 4 may not be equal). Of course, in other embodiments, the forming groove 4 can also be set to other shapes according to actual situations. The plurality of forming grooves 4 on the roller body 3 are sequentially distributed around the circumferential side surface of the roller body 3. Regarding the placement direction of the forming grooves 4 on the roller body 3, the length direction of the forming groove 4 can be Figure 1 perpendicular to the axial direction of the roller body 3, or the length direction of the forming groove 4 can be parallel to the axial direction of the roller body 3. The forming groove 4 can also be inclined on the surface of the roller body 3. In this embodiment Figure 2 the number of the roller bodies 3 is eight. Of course, in other embodiments, it can also be other numbers, such as six, ten, etc. One forming groove 4 in this embodiment is used to form a dumbbell-shaped product.

[0039] In this embodiment, a cylinder cavity is provided on each of the roller bodies 3. The inner wall of the cylinder cavity is circular. Figure 2 As shown, the left end of the roller body 3 is closed, and the other end of the roller body 3 is provided with an opening, and the opening communicates with the cylinder cavity. A rotating shaft is fixed (such as by welding or by bolts) at the closed end of the roller body 3. The rotating shaft is rotatably connected to the frame through a bearing. A driving mechanism (not shown in the figure) for driving the rotating shaft to rotate is provided on the frame. The driving mechanism includes a motor, and the rotating shaft is driven to rotate by the motor, thereby realizing the rotation of the roller body 3. In other embodiments, a speed reducer (such as a speed reducer in the form of gear meshing) can also be connected between the output shaft of the motor and the rotating shaft. In this way, the rotation speed of the rotating shaft can be made slower, so that the rotation speed of the roller body 3 is not too fast, and the rotation of the roller body 3 is more stable.

[0040] As shown in Figure 2 a closing cover 15 is provided at the opening end of the roller body 3. The closing cover 15 is fixed (such as by bolts) on the frame and cannot rotate. Figure 2The edge of the middle closed cover 15 bends leftward and is annular, and the cover is on the outside of the end of the roller cylinder 3. The closed cover 15 and the end of the roller cylinder 3 are rotationally matched. A partition 10 is fixedly connected (such as by welding or fixing with bolts) to the closed cover 15. The partition 10 is inserted into the cylinder cavity through an opening. The outer side wall of the partition 10 in this embodiment is arc-shaped, and the partition 10 is in contact with and slidably matched with the inner wall of the cylinder cavity (in this embodiment, the partition 10 does not contain the positive pressure cavity 21, and the positive pressure cavity 21 is a solid structure). The part in the cylinder cavity that is not filled by the partition 10 in this embodiment is the negative pressure cavity 6. In order to improve the sealing and lubricity between the partition 10 and the inner side wall of the cylinder cavity, lubricating oil is applied between the arc-shaped side wall of the partition 10 and the inner wall of the cylinder cavity.

[0041] Combined with Figure 2 As shown, a negative pressure pipe 16 is connected to the closed cover 15 in this embodiment. The negative pressure pipe 16 communicates with the negative pressure cavity 6. One end of the negative pressure pipe 16 away from the closed cover 15 is connected to a negative pressure machine. Negative pressure is generated by the negative pressure machine, and the negative pressure machine acts on the negative pressure cavity 6 through the negative pressure pipe 16, so that there is negative pressure in the negative pressure cavity 6.

[0042] Combined with Figure 2 and Figure 1 As shown, a plurality of air holes 5 communicating with the cylinder cavity are provided at the bottom of the forming groove 4. At the part where the partition is in contact with the cylinder cavity, the air holes 5 are blocked by the partition 10, while at the air holes in the negative pressure cavity 6, the air holes 5 are not blocked, and the negative pressure cavity 6 can be opposite to and communicate with the air holes 5 in the forming groove 4.

[0043] Combined with Figure 1 As shown, a sleeve 25 is provided outside the roller cylinder 3 in this embodiment. The sleeve 25 is fixedly installed on the frame. A plurality of rotating support rollers 26 are provided between the inner wall of the sleeve 25 and the circumferential side wall of the roller cylinder 3. The plurality of rotating support rollers 26 are distributed around the circumference of the roller cylinder 3. The rotating support rollers pass through Figure 2 the left end of the sleeve 25 in the middle. The rotating support rollers 26 are rotatably connected to the frame through bearings. The roller cylinder 3 is rotatably connected within the sleeve. Thus, by providing a plurality of rotating support rollers 26, the relative rotation between the sleeve 25 and the roller cylinder 3 is made smoother. At the same time, the arrangement of the rotating support rollers 26 makes there be a gap between the inner wall of the sleeve 25 and the outer wall of the roller cylinder 3, which can prevent the inner wall of the sleeve 25 from directly contacting and rubbing against the material in the forming groove 4, thereby improving the smoothness of the rotation of the sleeve 25 and the roller cylinder 3. In addition, when the material in the forming groove 4 passes through the rotating support rollers 26, the rotating support rollers 26 can also extrude the material in the forming groove 4, which is beneficial to improving the forming effect of the core. Of course, in other embodiments, the rotating support rollers 26 may not be provided, and the sleeve 25 and the roller cylinder 3 can be directly sleeved with each other.

[0044] In this embodiment, the feeding area is located on the sleeve. The feeding area is the area where the mixed material enters the forming groove 4. The feeding area in this embodiment is a feeding structure connected to the sleeve. The feeding structure includes a fiber feeding mechanism, a fiber carding mechanism, a polymer mixing mechanism, and a feeding pipe 1 connected in sequence. In this embodiment, the fiber feeding mechanism (for feeding fibers into the production line) and the fiber carding mechanism (such as a carding machine) are existing mechanisms. The fiber feeding mechanism and the fiber carding mechanism are connected through pipelines and are both applied in the existing hot air non-woven fabric processing technology, which will not be elaborated in this embodiment. The polymer mixing mechanism in this embodiment includes a mixing box. A spreading pipe for water-absorbing resin is connected to the upper part of the mixing box. One side of the mixing box is connected to the fiber carding mechanism through a pipeline, and the other side of the mixing box is connected to the feeding pipe 1 through a pipeline. In this embodiment Figure 1 the feeding pipe 1 communicates with one of the forming grooves 4. Of course, in other embodiments, multiple feeding pipes 1 may be provided, and the multiple feeding pipes 1 communicate with multiple forming grooves 4 respectively. For example, two feeding pipes 1 are provided, the two feeding pipes 1 are arranged adjacent to each other, and the two feeding pipes 1 face and communicate with two adjacent forming grooves 4. Thus, the fiber raw material enters the pipeline of the production line through the fiber feeding mechanism and enters the fiber carding mechanism along the pipeline. The fiber carding mechanism loosens the fiber raw material, making the fiber more loose. Then the loose fiber is blown into the mixing box through the pipeline, and the water-absorbing resin is scattered into the mixing box through the spreading pipe. The water-absorbing resin and the fiber are mixed under the action of wind in the mixing box and are blown into the feeding pipe 1 after mixing.

[0045] The discharging area is set on the sleeve. The discharging area is the area where the product detaches from the forming groove 4. The discharging area in this embodiment includes discharging holes 20. The number of discharging holes 20 can be one or more (when the discharging holes 20 are multiple, they need to be set corresponding to the number of feeding pipes 1), Figure 1 and one is shown in the figure. The negative pressure chamber 6 is located between the discharging holes 20 (excluding the positions of the discharging holes 20) and the feeding pipe 1 (including the positions of the feeding pipe 1).

[0046] The hot air shaping in this embodiment includes two hot air pipes, namely the first hot air pipe 27 and the second hot air pipe 28. The air outlets of the first hot air pipe 27 and the second hot air pipe 28 both face the roller body 3. The ends of the two hot air pipes are both in contact with and slidably matched with the roller body 3. When the forming groove 4 rotates to the hot air shaping area, the hot air pipes blow hot air into the forming groove 4. In this embodiment, the first hot air pipe 27 is located above the second hot air pipe 28, and the hot air temperature blown out by the first hot air pipe 27 (such as 50 - 80 °C) is lower than the hot air temperature blown out by the second hot air pipe 28 (such as 130 - 150 °C).

[0047] This embodiment Figure 1The discharge hole 20 therein is located at the bottom of the sleeve, and the discharge hole 20 can be opposite to the forming groove 4. Of course, in other embodiments, the discharge hole 20 can also be provided on other sides of the sleeve.

[0048] In addition, a conveyor belt is provided below the sleeve, and the conveyor belt is used to receive the products and convey them to other processing procedures.

[0049] The specific implementation process is as follows: In this embodiment, the feed pipe 1 is used to convey the mixed material of fibers and water-absorbing resin into the forming groove 4 of the roller body 3, so that the material entering the forming groove 4 is the mixed material. Then the roller body 3 rotates clockwise. During the rotation, since there is negative pressure in the negative pressure chamber 6 and the air holes 5 here are not blocked, there is negative pressure in the forming groove 4 of the roller body 3 at the negative pressure chamber 6. Under the action of the negative pressure, the fibers and the water-absorbing resin are stably adsorbed in the forming groove 4 and are shaped in the forming groove 4 under the action of the negative pressure. The fibers are intertwined with each other under the action of the negative pressure, and there is friction between adjacent fibers. The structure of the shaped product is firm and stable. The shaped product is in the shape of a dumbbell.

[0050] Then the roller body 3 continues to rotate, and the forming groove 4 rotates to the hot air shaping area. The forming groove 4 passes through the first hot air pipe 27 and the second hot air pipe 28 in sequence. The first hot air pipe 27 first blows hot air into the forming groove 4, so that the fibers with a lower heat-resistant temperature first melt and bond, realizing preliminary hot air shaping. Then, the forming groove 4 passes through the second hot air pipe 28, and the temperature blown out by the second hot air pipe 28 is higher, so that the fibers in the forming groove 4 are further heated and melted, and thus bonded together, and the structure of the core body is more firm. In this way, using the principle of hot air non-woven fabric, the core body is heat-shaped. The blown hot air enters the negative pressure chamber 6 through the air holes 5 and is then sucked away by the negative pressure pipe 16.

[0051] Then the roller body 3 rotates to the discharge hole 20 in the discharge area. In this embodiment, the inner wall of the roller body 3 at the discharge hole 20 is in contact with the partition portion 10, and the partition portion 10 blocks the air holes 5 of the forming groove 4 at the discharge hole 20. There is no negative pressure in the air holes 5 at this part, and the product detaches from the forming groove 4 of the roller body 3 and falls downward through the discharge hole 20 onto the conveyor belt 14. In order to make it easier for the product to fall out of the forming groove 4, in other embodiments, a suction fan is provided on the lower surface of the conveyor belt 14, and through holes are provided on the conveyor belt 14, and suction is generated downward by the suction fan, so as to facilitate the product in the forming groove 4 to fall downward.

[0052] After the product falls out of the forming groove 4, the forming groove 4 is emptied. When the forming groove 4 rotates to the feed pipe 1 again, it receives the mixed material of the feed pipe 1. Thus, with the continuous cyclic rotation of the roller body 3, the batch production of the product is realized.

[0053] Subsequently, when preparing sanitary products, a non-woven paper or a bottom film and other structures are further laminated on each independent dumbbell-shaped product, and then laminated onto the sanitary product (for example, laminating the core onto the crotch of the diaper pant body)

[0054] In this embodiment, since the preparation process of the hot air non-woven fabric in the prior art also includes a fiber feeding mechanism and a fiber carding mechanism, and the transfer of the fiber raw material is also carried out by blowing the fiber through a gas in a pipeline, when adopting the feeding method in the present application, existing equipment such as pipelines and air pressure can be utilized, reducing the equipment cost. Meanwhile, by adopting the method of blowing with gas to sprinkle the water-absorbing resin into the fiber, the fiber and the water-absorbing resin can be naturally mixed, and the operation is simple and convenient.

[0055] Embodiment 2

[0056] This embodiment is improved and perfected on the basis of Embodiment 1. A positive pressure chamber 21 is provided on the partition portion 10 in the discharging area. There is positive pressure in the positive pressure chamber 21. The positive pressure chamber 21 is opposite to the discharging hole 20, and the side wall of the partition portion 10 at the positive pressure chamber 21 does not adhere to the inner wall of the roller body 3; when the forming groove 4 rotates to between the positive pressure chamber 21 and the discharging hole 20, the positive pressure chamber 21, the air holes and the discharging hole 20 are communicated. Figure 2 As shown in the figure, in this embodiment, a positive pressure pipe 23 is connected to the closing cover 15, and an air pump is connected to the positive pressure pipe 23. The positive pressure pipe 23 is communicated with the positive pressure chamber 21. Through the positive pressure pipe 23, the air pump can blow air into the positive pressure chamber 21, so that there is positive pressure in the positive pressure chamber 21.

[0057] Thus, when the forming groove 4 filled with the shaped product rotates to the discharging hole 20, the positive pressure chamber 21, the air holes and the discharging hole 20 are communicated with each other. There is positive pressure in the positive pressure chamber 21, and the gas in the positive pressure chamber 21 blows out the product in the forming groove 4 through the air holes, and the blown-out product falls out through the discharging hole 20. The setting of the positive pressure chamber 21 in this solution makes the discharging in the forming groove 4 smoother, avoiding the product from adhering in the forming groove 4 and being difficult to fall off.

[0058] Embodiment 3

[0059] Combined with Figure 4 As shown in the figure, on the basis of what is described in Embodiment 1 or 2, this embodiment can also cancel the first hot air pipe 27 and the second hot air pipe 28. In this way, the core after negative pressure shaping moves to the discharging area and is directly discharged onto the conveyor belt 14, and then the conveyor belt 14 conveys the core after negative pressure shaping into the oven, and the oven heats the core after negative pressure shaping or blows hot air into the core, so as to carry out hot air shaping. It can be seen that the first hot air pipe 27 and the second hot air pipe 28 of the core preparation and lamination device are not necessary structures, and negative pressure shaping can be carried out through the core preparation and lamination device.

[0060] Embodiment 4

[0061] The above Examples 1-3 are used to prepare the core with a small grammage (50-120 gsm). When it is necessary to prepare the core with a large grammage (420-450 gsm), on the basis of the core with a small grammage prepared by the device of the present application, the core prepared by the device can be transferred to other equipment platforms (such as the main machine for diaper production), and more superabsorbent polymers can be sprinkled into the voids of the core, so as to prepare the core with a large grammage, which is applicable to sanitary products such as diapers with a large liquid absorption capacity;

[0062] Alternatively, a core without superabsorbent polymers is prepared by using the device of the present application (the core formed by the forming groove only contains fiber components), and then more superabsorbent polymers are sprinkled into the voids of the core on other equipment platforms outside the device (such as the main machine for diaper production), so as to prepare the core with a large grammage, which is applicable to sanitary products such as diapers with a large liquid absorption capacity.

[0063] The above are only the embodiments of the present utility model. Specific technical solutions and / or common knowledge such as characteristics well known in the art are not described in detail herein. It should be noted that for those skilled in the art, without departing from the technical solution of the present utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the present utility model, and these will not affect the implementation effect of the present utility model and the practicality of the patent. The protection scope required by this application shall be subject to the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. A composite roller, characterized in that: It includes a roller body, on the circumferential side surface of which there are provided a plurality of forming grooves, and the plurality of forming grooves on the roller body are sequentially distributed around the circumferential side surface of the roller body; Inside the roller body there is a cylindrical cavity, and air holes for communicating with the cylindrical cavity are provided at the bottoms of the forming grooves; A partition part is provided in the cylindrical cavity, the partition part is rotatably arranged relative to the roller body, the partition part divides the cylindrical cavity into a negative pressure cavity and a non-negative pressure area, and the air holes communicate when opposite to the negative pressure cavity.

2. The composite roller according to claim 1, wherein: The forming groove is dumbbell-shaped, and the volumes of both ends of the forming groove are the same.

3. A composite roller according to claim 1, characterized in that: The forming groove is dumbbell-shaped, and the volume of one end of the forming groove is larger than that of the other end.

4. A composite roller according to claim 1, characterized in that: There are multiple groups of the forming grooves, and the multiple forming grooves in each circle are one group, and the multiple groups of forming grooves are arranged along the axial direction of the roller body.

5. A composite roller according to claim 1, wherein: At the end of the roller body, a closing cover for blocking the cylindrical cavity is rotatably provided, and a negative pressure pipe is connected to the closing cover, and the negative pressure pipe communicates with the negative pressure cavity.

6. A composite roller according to claim 5, characterized in that: A positive pressure cavity is provided in the non-negative pressure area, and a positive pressure pipe is connected to the closing cover, and the positive pressure pipe communicates with the positive pressure cavity.

7. The composite roller according to claim 5, wherein: The outer diameter of the roller body is 0.5 - 1 m; the depth of the forming groove is 1 - 5 mm.

8. Core preparation composite device, characterized in that: It includes a frame and a composite roller according to any one of claims 1 - 7, the roller body is rotatably arranged on the frame, and a driving mechanism for driving the roller body to rotate is provided on the frame.

9. The composite device for preparing a core according to claim 8, characterized in that: A sleeve is fixedly provided on the frame, and the sleeve is sleeved outside the roller body.

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