A composite absorbent core forming apparatus and a method of forming the same

Abstract

The present application relates to the field of disposable sanitary products, and particularly relates to a composite absorbent core forming device, comprising a first forming device, a second forming device and a winding device for the absorbent core, which are arranged in a flow line, one side of the first forming device is provided with a fluffy cotton input mechanism for fluffy cotton conveying, a first non-woven fabric input mechanism for first non-woven fabric conveying, and a second non-woven fabric input mechanism for second non-woven fabric conveying; a separation mechanism for separating the first non-woven fabric from the fluffy cotton is arranged between the first forming die and the second forming die, and the separation mechanism separates the first non-woven fabric from the primary composite cloth. The technical problem of low work efficiency and poor stability in the prior art when adding macromolecules on the composite non-woven fabric is solved. Based on this, a composite absorbent core forming method is also proposed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of disposable sanitary product equipment, in particular to a composite absorbent core forming device and a forming method thereof. BACKGROUND

[0002] At present, the most conventional forming of absorbent cores is realized by using a forming device, which usually includes a forming mold wheel and a spreading device. For example, a manufacturing absorbent core device disclosed in Chinese patent application No. CN202210900619.2 includes a rack, a controller, a first material conveying mechanism, a second material conveying mechanism, a first gluing mechanism, a second gluing mechanism, a first pressure roller, a second pressure roller, a first high polymer material compounding mechanism, a second high polymer material compounding mechanism, and a compounding roller. The first high polymer material compounding mechanism and the second high polymer material compounding mechanism each include a first transfer roller, a second transfer roller, a high polymer storage cylinder, and a third gluing mechanism. The first transfer roller is provided with a negative pressure adsorption mechanism and a plurality of high polymer adsorption grooves with different amounts of high polymer on the surface of the first transfer roller body.

[0003] A current absorbent core with composite non-woven fabric can be referred to the absorbent core with composite non-woven fabric disclosed in Chinese patent application No. CN202310469078.7, which includes a body, the body includes an upper fiber layer, a lower fiber layer, and an intermediate fiber layer clamped between the upper fiber layer and the lower fiber layer, the upper fiber layer, the lower fiber layer, and the intermediate fiber layer are mutually adhered to form an adhesive part, the area of the adhesive part accounts for 5-100% of the area of the body, the fiber fineness of the upper fiber layer and / or the lower fiber layer is 4-12D, the fiber fineness of the intermediate fiber layer is 0.6-2D, the high molecular water-absorbing particles are embedded in the upper fiber layer and the lower fiber layer, the average pore of the upper fiber layer and the lower fiber layer is greater than the average diameter of the high molecular water-absorbing particles, and the average pore of the intermediate fiber layer is smaller than the average diameter of the high molecular water-absorbing particles. It is necessary to add high molecules to the composite non-woven fabric, and how to efficiently and stably complete this process has become the research of the present applicant. SUMMARY

[0004] Therefore, in view of the above problems, the present application provides a composite absorbent core forming device, which solves the technical problems of low work efficiency and poor stability in the process of adding high molecules to the composite non-woven fabric. Based on this, a composite absorbent core forming method is also provided.

[0005] In order to achieve the above object, the present application adopts the following technical scheme: a composite absorbent core forming device, comprising a first forming device, a second forming device and a winding device for the absorbent core, which are arranged in a flow line; one side of the first forming device is provided with a fluffy cotton input mechanism for fluffy cotton conveying, a first non-woven fabric input mechanism for first non-woven fabric conveying, and a second non-woven fabric input mechanism for second non-woven fabric conveying;

[0006] The first forming device comprises a first forming die and a first scattering device for scattering the first high molecule;

[0007] The second forming device comprises a second forming die and a second scattering device for scattering the second high molecule;

[0008] The first non-woven fabric input mechanism is used for inputting the first non-woven fabric to the surface of the first forming die, the fluffy cotton input mechanism is used for inputting the fluffy cotton to the first forming die, and covering the outer surface of the first non-woven fabric, the second non-woven fabric input mechanism is used for inputting the second non-woven fabric to the surface of the first forming die, and covering the outer surface of the fluffy cotton, the first scattering device is located above the first forming die and between the input end of the fluffy cotton and the input end of the second non-woven fabric, and is used for scattering the first high molecule to the outer surface of the fluffy cotton;

[0009] The first forming die and the second forming die are provided with a separation mechanism for separating the first non-woven fabric from the fluffy cotton, and the separation mechanism separates the first non-woven fabric and the primary composite cloth;

[0010] The second forming die is used for receiving the primary composite cloth output by the first forming die, and the second non-woven fabric in the primary composite cloth is attached to the outer surface of the second forming die, and the fluffy cotton is located on the outer surface of the second non-woven fabric;

[0011] The first non-woven fabric separated by the separation mechanism is input to the second forming die after winding, and covers the outer surface of the primary composite cloth, and the second scattering device is located above the second forming die and between the input end of the primary composite cloth and the input end of the separated first non-woven fabric;

[0012] The first non-woven fabric input mechanism and the first forming die are provided with a first glue spraying device for spraying glue on the input second non-woven fabric;

[0013] The input end of the separation mechanism and the second forming die are provided with a second glue spraying device for spraying glue on the separated first non-woven fabric.

[0014] Further, the first forming die and the second forming die are provided with an adsorption wheel for removing dust generated by the first forming die and the second forming die.

[0015] Further, a first oscillation mechanism for oscillating the primary composite cloth is arranged between the first forming die wheel and the second forming die wheel.

[0016] Further, the first forming die wheel and the second forming die wheel are negative pressure adsorption die wheels.

[0017] A composite absorbent core forming method based on the same inventive concept comprises the following steps:

[0018] In a first step, a first non-woven fabric is input into the first forming die wheel by a first non-woven fabric input mechanism, and fluffy cotton is input into the first forming die wheel by a fluffy cotton input mechanism, and the fluffy cotton covers the outer surface of the first non-woven fabric, and then a high polymer is spread on the outer surface of the fluffy cotton by a first spreading device;

[0019] In a second step, a second non-woven fabric is input into the first forming die wheel by a second non-woven fabric input mechanism, and the second non-woven fabric covers the outer surface of the fluffy cotton, thereby covering the fluffy cotton after the high polymer is spread;

[0020] In a third step, the primary composite of the first non-woven fabric, the fluffy cotton, and the second non-woven fabric is output, and the first non-woven fabric in the primary composite is separated by a separation mechanism, thereby forming a primary composite cloth;

[0021] In a fourth step, the primary composite cloth is input into the second forming die wheel, so that the second non-woven fabric is attached to the outer surface of the second forming die wheel, and the fluffy cotton covers the outer surface of the second non-woven fabric, and then a high polymer is spread on the outer surface of the fluffy cotton by a second spreading device;

[0022] In a fifth step, the separated first non-woven fabric is covered on the outer surface of the fluffy cotton on the second forming die wheel;

[0023] In a sixth step, the complete composite of the first non-woven fabric, the fluffy cotton, and the second non-woven fabric is output, and the complete composite is wound by a winding device.

[0024] Further, in the second step, a second glue spraying device is used to spray glue on the second non-woven fabric, thereby achieving adhesion with the fluffy cotton.

[0025] Further, in the fifth step, a first glue spraying device is used to spray glue on the first non-woven fabric, thereby achieving adhesion with the fluffy cotton.

[0026] Further, in the third step, an adsorption wheel arranged between the first forming die wheel and the second forming die wheel is used to remove dust generated by the first forming die wheel and the second forming die wheel.

[0027] Further, in the third step, the oscillation mechanism arranged between the first forming wheel and the second forming wheel is used to oscillate the primary composite fabric, so as to realize the reasonable distribution of the polymer on the fluffy cotton.

[0028] Further, in the sixth step, the second oscillation mechanism arranged outside the second forming wheel is used to oscillate the complete composite, so as to realize the reasonable distribution of the polymer on the fluffy cotton.

[0029] By adopting the foregoing technical scheme, the present application has the following beneficial effects:

[0030] 1. The first forming device and the second forming device are arranged, the first non-woven fabric input mechanism and the fluffy cotton input mechanism are used to input the first non-woven fabric and the fluffy cotton into the first forming device, the first non-woven fabric is attached to the first forming wheel, and the fluffy cotton is located on the outer surface of the first non-woven fabric, so that the first spreading device is used to spread the polymer to the outer surface of the fluffy cotton, the second non-woven fabric input mechanism is used to input the second non-woven fabric, so as to cover the outer surface of the fluffy cotton, and the first spread polymer is covered. Then, the separation mechanism is used to separate the first non-woven fabric, and then the separated primary composite fabric is input to the second forming wheel, so that the second non-woven fabric is attached to the second forming wheel, and the fluffy cotton faces outward, and then the second spreading device is used for secondary spreading, and finally the separated first non-woven fabric is re-combined with the fluffy cotton to form a composite non-woven fabric after two times of polymer spreading. Then, it is output to the winding device for winding.

[0031] With such a structure, when the polymer is spread, the first non-woven fabric and the second non-woven fabric can be used as the bottom layer to support and prevent the polymer material from being absorbed through the fluffy cotton. Moreover, the relatively uniform and dense pores of the non-woven fabric can effectively control the size of the adsorption force, realize relatively stable addition of the polymer, and the structure is compact and occupies a small area. There is no need to slow down or slow down in the process, so that the polymer can be spread and added more efficiently.

[0032] The first glue spraying device and the second glue spraying device can be used to spray glue on the first non-woven fabric and the second non-woven fabric, so as to realize the gluing of the first non-woven fabric, the second non-woven fabric and the fluffy cotton. Of course, other ways such as hot pressing and ultrasonic welding can also be used to realize the connection.

[0033] 2. In order to realize the conveying of the wide-width material by the fluffy cotton, the first non-woven fabric, the second non-woven fabric, the winding device, the separation mechanism, one or more of the unwinding mechanism, the deviation correcting mechanism, the buffer mechanism, the tensioning mechanism, the conveying mechanism and the guide mechanism can be arranged according to actual needs. These mechanisms are conventional technologies in the technical field.

[0034] 3、Due to the addition of high polymer, it is also possible to add wood pulp cotton or other materials, which is easy to produce dust, and the dust can be removed by the adsorption wheel. The adsorption force is arranged between the first forming die wheel and the second forming die wheel, which can better realize the removal effect. The first oscillation mechanism can realize more stable and uniform distribution of high polymer in the fluffy cotton.

[0035] 4、A composite absorbent core forming method based on the same inventive concept can realize smaller floor area, higher work efficiency, higher stability, and effectively improve the uniformity of the distribution of high polymer on the fluffy cotton. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a structural schematic diagram of the present application;

[0037] Figure 2 is a structural schematic diagram of the present application.

[0038] REFERENCE SIGNS:

[0039] 11、first forming die wheel; 12、first spreading device; 13、first glue spraying device; 21、second forming die wheel; 22、second spreading device; 23、second glue spraying device; 3、winding device; 4、fluffy cotton input mechanism; 5、first non-woven fabric input mechanism; 6、second non-woven fabric input mechanism; 7、separating mechanism; 8、adsorption wheel; 91、first non-woven fabric; 92、second non-woven fabric; 93、fluffy cotton; 94、primary composite cloth. DETAILED DESCRIPTION

[0040] The present application will be further described in conjunction with the drawings and specific embodiments.

[0041] REFERENCE Figure 1 The present embodiment provides a composite absorbent core forming device, which comprises a first forming device, a second forming device and a winding device 3 for composite absorbent core arranged in a flow line. One side of the first forming device is provided with a fluffy cotton input mechanism 4 for fluffy cotton 93 conveying, a first non-woven fabric input mechanism 5 for first non-woven fabric 91 conveying, and a second non-woven fabric input mechanism 6 for second non-woven fabric 92 conveying.

[0042] The first forming device comprises a first forming die wheel 11 and a first spreading device 12 for spreading high polymer.

[0043] The second forming device comprises a second forming die wheel 21 and a second spreading device 22 for spreading second high polymer.

[0044] The first non-woven fabric input mechanism 5 is used to input the first non-woven fabric 91 to the surface of the first forming wheel 11, the fluffy cotton input mechanism 4 is used to input the fluffy cotton 93 to the first forming wheel 11, and cover the outer surface of the first non-woven fabric, the second non-woven fabric input mechanism 6 is used to input the second non-woven fabric 92 to the surface of the first forming wheel 11, and cover the outer surface of the fluffy cotton 93, the first spreading device 12 is located above the first forming wheel 11 and between the input end of the fluffy cotton 93 and the input end of the second non-woven fabric 92, and is used to spread the polymer on the outer surface of the fluffy cotton 93;

[0045] The first forming wheel 11 and the second forming wheel 21 are provided with a separation mechanism 7 for separating the first non-woven fabric 91 from the fluffy cotton 93, and the separation mechanism 7 separates the first non-woven fabric 91 and the primary composite fabric 94;

[0046] The second forming wheel 21 is used to receive the primary composite fabric 94 output by the first forming wheel 11, and the second non-woven fabric 92 in the primary composite fabric 94 is attached to the outer surface of the second forming wheel 21, and the fluffy cotton 93 is located on the outer surface of the second non-woven fabric 92.

[0047] The first non-woven fabric separated by the separation mechanism 7 is input to the second forming wheel 21 after winding, and covers the outer surface of the primary composite fabric 94, and the second spreading device 22 is located above the second forming wheel 21 and between the input end of the primary composite fabric 94 and the input end of the separated first non-woven fabric. The separation mechanism 7 can be a structure for winding composed of multiple guide rollers.

[0048] The first glue spraying device 13 is provided between the second non-woven fabric input mechanism 6 and the first forming wheel 11, and is used to spray glue on the input second non-woven fabric 92. The second glue spraying device 23 is provided between the input end of the separation mechanism 7 and the second forming wheel 21, and is used to spray glue on the separated first non-woven fabric 91. The first glue spraying device 13 and the second glue spraying device 23 are both conventional glue spraying equipment in the art, which can be purchased from the market.

[0049] The fluffy cotton input mechanism 4, the first non-woven fabric input mechanism 5, the second non-woven fabric input mechanism 6 and the winding device 3 all include one or more of unwinding mechanism, deviation correction mechanism, buffer mechanism, tensioning mechanism, conveying mechanism and guiding mechanism. The above-mentioned unwinding mechanism, deviation correction mechanism, buffer mechanism, tensioning mechanism, conveying mechanism and guiding mechanism are conventional technical means in the art, and can be related to the applicant's patents, such as the unwinding mechanism disclosed in Chinese patent application No. CN201510264615.X, a wire unwinding device, such as the deviation correction structure disclosed in Chinese patent application No. CN201621469755.7, a paper web deviation correction mechanism, such as the buffer mechanism and the tensioning mechanism disclosed in Chinese patent application No. CN201420387213.X, a material tension control device, such as the conveying mechanism and the guiding mechanism disclosed in Chinese patent application No. CN202011605786.1, a material unwinding control method, etc. The above-mentioned mechanisms can be increased or decreased according to the needs, and other conventional devices can also be added. Similarly, the separation mechanism 7 can also be composed of one or more of the unwinding mechanism, deviation correction mechanism, buffer mechanism, tensioning mechanism, conveying mechanism and guiding mechanism.

[0050] The first forming die wheel 11 and the second forming die wheel 21 are both negative pressure adsorption die wheels.

[0051] The fluffy cotton 93, also known as fluffy non-woven fabric, can also be other materials as long as it can achieve the support of the scattering of double-sided high molecules. The above-mentioned winding device 3 is a conventional technical means in the art, and can also refer to the applicant's related patents, such as Chinese patent application No. CN202222975300.4, a coreless winding equipment.

[0052] Referring again to Figure 2 , the difference between Figure 1 lies in that the first forming die wheel 11 and the second forming die wheel 21 are provided with an adsorption wheel 8 for removing dust generated by the first forming die wheel 11 and the second forming die wheel 21. In fact, the adsorption wheel 8 can also be replaced by other structural forms, such as an adsorption conveyor belt, etc. Moreover, it can also be replaced by other functional components, such as a vibration mechanism, etc.

[0053] In practical applications, the first oscillating mechanism and the second oscillating mechanism can be arranged to oscillate the primary composite cloth and the complete composite, so that the distribution of the polymer in the fluffy cotton is more stable and uniform. When oscillating, there are two options. One is to make the polymer gather in the middle of the fluffy cotton. This way can make the position of the polymer in the fluffy cotton stable, prevent the polymer from clumping, and the uniformity of the water absorption effect is better. The other is to make the polymer uniformly distributed on the surface of the fluffy cotton. In this way, the pores of the fluffy cotton are used to position the polymer particles, so that the arrangement of the polymer particles is better, and when absorbing water, both the upper and lower surfaces of the fluffy cotton can absorb water, and the middle of the fluffy cotton serves as a water passage, so that the purpose of rapid water absorption can be achieved. The first oscillating mechanism and the second oscillating mechanism are conventional technical means in the art, which can be obtained by market procurement, and therefore will not be described here. There is no related indication in the figure.

[0054] A composite absorbent core forming method based on the same inventive concept, comprising the following steps:

[0055] In the first step, the first non-woven fabric 91 is input into the first forming mold wheel 11 by the first non-woven fabric input mechanism 5, the fluffy cotton 93 is input into the first forming mold wheel 11 by the fluffy cotton input mechanism 4, and the fluffy cotton 93 covers the outer surface of the first non-woven fabric 91. Then, the polymer is scattered onto the outer surface of the fluffy cotton 93 by the first spreading device 12.

[0056] In the second step, the second non-woven fabric 92 is input into the first forming mold wheel 11 by the second non-woven fabric input mechanism 6, and the second non-woven fabric 92 covers the outer surface of the fluffy cotton 93, covering the fluffy cotton 93 after the polymer is scattered.

[0057] In the third step, the primary composite of the first non-woven fabric 91, the fluffy cotton 93, and the second non-woven fabric 92 is output, and the first non-woven fabric 91 in the primary composite is separated by the separating mechanism 7 after output, forming the primary composite cloth 94.

[0058] In the fourth step, the primary composite cloth 94 is input into the second forming mold wheel 21, so that the second non-woven fabric 92 is attached to the outer surface of the second forming mold wheel 21, and the fluffy cotton 93 covers the outer surface of the second non-woven fabric 92. Then, the polymer is scattered onto the outer surface of the fluffy cotton 92 by the second spreading device 22.

[0059] In the fifth step, the separated first non-woven fabric 91 is covered on the outer surface of the fluffy cotton 93 on the second forming mold wheel 21.

[0060] In the sixth step, the complete composite of the first non-woven fabric 91, the fluffy cotton 93, and the second non-woven fabric 92 is output, and the winding device 3 is used for winding.

[0061] In the second step, the second non-woven fabric 92 is sprayed with glue by the second glue spraying device 23 to achieve adhesion with the fluffy cotton 93.

[0062] In the fifth step, the first non-woven fabric 91 is sprayed with glue by the first glue spraying device 13 to achieve adhesion with the fluffy cotton 93.

[0063] In the third step, the dust generated by the first forming mold wheel 11 and the second forming mold wheel 21 is removed by the adsorption wheel 8 arranged between the first forming mold wheel 11 and the second forming mold wheel 21.

[0064] In the third step, the primary composite fabric 94 is oscillated by the oscillation mechanism arranged between the first forming mold wheel 11 and the second forming mold wheel 21 to achieve reasonable distribution of the polymer on the fluffy cotton 93.

[0065] In the sixth step, the complete composite is oscillated by the second oscillation mechanism arranged outside the second forming mold wheel 21 to achieve reasonable distribution of the polymer on the fluffy cotton 93.

[0066] The outer surface of the fluffy cotton in the first step and the outer surface of the fluffy cotton in the fourth step are actually opposite two surfaces. The fluffy cotton is flipped after being wound around the first forming mold wheel and the second forming mold wheel, and the polymer is sown on different surfaces of the fluffy cotton, thereby achieving high work efficiency.

[0067] Although the present application is specifically shown and described in connection with the preferred embodiments, those skilled in the art will understand that various modifications in form and detail can be made therein without departing from the spirit and scope of the application as defined by the appended claims.

Claims

1. A composite absorbent core forming device, characterized in that: It includes a first forming device, a second forming device and a winding device for absorbent core, arranged in a production line. The first forming device is provided with a fluff cotton input mechanism for conveying fluff cotton, a first non-woven fabric input mechanism for conveying the first non-woven fabric, and a second non-woven fabric input mechanism for conveying the second non-woven fabric on one side. The first molding device includes a first molding die wheel and a first spreading device for spreading the first polymer; The second molding device includes a second molding die wheel and a second spreading device for spreading the second polymer; The first nonwoven fabric input mechanism is used to input the first nonwoven fabric onto the surface of the first forming die wheel. The fluffy cotton input mechanism is used to input fluffy cotton onto the first forming die wheel and cover the outer surface of the first nonwoven fabric. The second nonwoven fabric input mechanism is used to input the second nonwoven fabric onto the surface of the first forming die wheel and cover the outer surface of the fluffy cotton. The first spreading device is located above the first forming die wheel and between the fluffy cotton input end and the second nonwoven fabric input end, and is used to spread the first polymer onto the outer surface of the fluffy cotton. A separation mechanism for separating the first nonwoven fabric from the fluffy cotton is provided between the first forming die wheel and the second forming die wheel. The separation mechanism separates the first nonwoven fabric from the primary composite fabric. The second forming die wheel is used to receive the primary composite fabric output by the first forming die wheel, and the second non-woven fabric in the primary composite fabric is attached to the outer surface of the second forming die wheel, and the fluffy cotton is located on the outer surface of the second non-woven fabric. The first nonwoven fabric separated by the separation mechanism is fed into the second forming die wheel and covers the outer surface of the primary composite fabric. The second spreading device is located above the second forming die wheel and between the input end of the primary composite fabric and the input end of the separated first nonwoven fabric. A first adhesive spraying device is provided between the second nonwoven fabric input mechanism and the first forming die wheel for spraying adhesive onto the input second nonwoven fabric; A second adhesive spraying device is provided between the input end of the separation mechanism and the second forming mold wheel for spraying adhesive onto the separated first nonwoven fabric. A first oscillation mechanism for oscillating the primary composite fabric is provided between the first forming die wheel and the second forming die wheel.

2. The composite absorbent core forming device according to claim 1, characterized in that: An adsorption wheel is provided between the first forming die wheel and the second forming die wheel to remove dust generated by the first forming die wheel and the second forming die wheel.

3. The composite absorbent core forming device according to claim 1, characterized in that: Both the first forming mold wheel and the second forming mold wheel are mold wheels with negative pressure adsorption.

4. A method for forming a composite absorbent core, applied to the composite absorbent core forming apparatus according to any one of claims 1 to 3, characterized in that, Includes the following steps: The first step involves feeding the first nonwoven fabric into the first forming die wheel using the first nonwoven fabric feeding mechanism, feeding fluffy cotton into the first forming die wheel using the fluffy cotton feeding mechanism, and covering the outer surface of the first nonwoven fabric with fluffy cotton. Then, the first spreading device is used to spread polymer onto the outer surface of the fluffy cotton. The second step involves using a second nonwoven fabric input mechanism to input the second nonwoven fabric into the first forming mold wheel, and using a second adhesive spraying device to spray adhesive onto the second nonwoven fabric to achieve adhesion with the fluffy cotton. The second nonwoven fabric then covers the outer surface of the fluffy cotton, thus covering the fluffy cotton after the polymer is spread. The third step is to output the preliminary composite of the first nonwoven fabric, fluffy cotton, and second nonwoven fabric. After outputting, the first nonwoven fabric in the preliminary composite is separated by the separation mechanism to form a primary composite fabric. The fourth step involves feeding the composite fabric into the second forming die wheel, causing the second nonwoven fabric to adhere to the outer surface of the second forming die wheel, and the fluffy cotton to cover the outer surface of the second nonwoven fabric. Then, the polymer is spread onto the outer surface of the fluffy cotton using the second spreading device. The fifth step involves using the first adhesive spraying device to spray adhesive onto the first nonwoven fabric to achieve adhesion with the fluffy cotton, and then covering the separated first nonwoven fabric onto the outer surface of the fluffy cotton on the second forming mold wheel. The sixth step is to output the complete composite of the first nonwoven fabric, fluffy cotton, and the second nonwoven fabric, and then rewind it using a winding device.

5. The composite absorbent core molding method according to claim 4, characterized in that: In the third step, an adsorption wheel positioned between the first and second forming mold wheels is used to remove the dust generated by the first and second forming mold wheels.

6. The method for forming a composite absorbent core according to claim 4, characterized in that: In the third step, an oscillation mechanism set between the first forming mold wheel and the second forming mold wheel is used to oscillate the composite fabric to achieve a reasonable distribution of polymer on the fluffy cotton.

7. The method for forming a composite absorbent core according to claim 4, characterized in that: In the sixth step, a second oscillation mechanism, located outside the second molding die, is used to oscillate the complete composite material, thereby achieving a reasonable distribution of polymer on the fluffy cotton.

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