Composite structure seat and material spraying equipment

Abstract

The invention relates to the technical field of automobile seats, and provides a composite structure seat which comprises a comfortable layer, a coconut fiber layer and a supporting framework. The supporting framework is made of a metal material, and the coconut shell fiber layer is arranged on the supporting framework; a comfortable layer is arranged on the side, away from the supporting framework, of the coconut shell fiber layer. The comfortable layer is made of a soft material with good air permeability; and air holes are formed in the comfortable layer. On the other hand, the invention further discloses material spraying equipment for manufacturing the seat, and the material spraying equipment comprises a seat mold, a material spraying pipe, a glue spraying pipe and an air suction pipe; the material spraying pipe and the air suction pipe are arranged on the two sides of a seat mold respectively. Coconut shell fibers are conveyed in the material spraying pipe and sprayed to the seat mold. The glue spraying pipe is fixed to the material spraying pipe and sprays glue to the seat mold.

Description

Technical Field

[0001] This application relates to the field of automotive seat technology, and in particular to a composite structure seat and a spraying device. Background Technology

[0002] In the interior space of cars and buses, the larger the space occupied by the seats, the smaller the passenger seating space and the worse the comfort. Currently, car seat backrests on the market consist of a metal support frame and soft padding, with the padding mostly made of polyurethane foam. To meet the requirements of softness for seating comfort and to protect the occupants and reduce injury in the event of a vehicle collision, the padding needs to cushion the impact of the metal support frame on the body. Therefore, the thickness of the polyurethane foam padding is greater than 30mm, and the cushioning area is 50-70mm thick. This occupies a significant amount of seating space and reduces passenger comfort. However, directly reducing the thickness of the polyurethane foam material may reduce the softness of the seat, and the polyurethane foam material may tear when it sinks or dents, affecting durability and even potentially exposing the metal structure of the seat, threatening passenger safety. Summary of the Invention

[0003] The purpose of this application is to provide a composite structure seat and a spraying device to solve at least one of the technical problems existing in the prior art.

[0004] To solve the above-mentioned technical problems, this application provides a composite structure seat, including a comfort layer, a coconut fiber layer and a support frame;

[0005] The supporting frame is made of metal material and has the coconut shell fiber layer on it;

[0006] A comfort layer is provided on the side of the coconut shell fiber layer away from the supporting frame;

[0007] The comfort layer is made of a soft and breathable material.

[0008] Furthermore, the comfort layer is provided with ventilation holes.

[0009] Furthermore, the comfort layer is made of one or more of the following materials: polyurethane foam, PET fiber, doll cotton, and hard cotton.

[0010] Furthermore, the comfort layer also includes a backrest comfort area;

[0011] The backrest comfort zone includes a central zone and side zones with different thicknesses;

[0012] The side zone is thicker than the middle zone, which is used to improve the comfort of the backrest comfort zone.

[0013] Preferably, the thickness of the coconut shell fiber layer is 10 mm;

[0014] The thickness of the central region is 10 mm;

[0015] The thickness of the side region is 20 mm.

[0016] On the other hand, this application also discloses a spraying device for manufacturing the seat, including a seat mold, a spraying pipe, a glue spraying pipe and a suction pipe;

[0017] The spray pipe and the suction pipe are respectively arranged on both sides of the seat mold;

[0018] The spray pipe conveys coconut shell fibers and sprays the coconut shell fibers onto the seat mold;

[0019] The adhesive spray tube is used to spray adhesive onto the seat mold;

[0020] The suction pipe is used to guide airflow through the seat mold, thereby causing the coconut shell fibers to accumulate and mix with the adhesive, forming a disordered three-dimensional mesh structure of coconut shell fiber layer.

[0021] Furthermore, the seat mold is provided with sieve holes to allow air to pass through the seat mold and to retain the coconut shell fibers on the seat mold;

[0022] The coconut shell fibers are curled to prevent them from passing through the sieve holes.

[0023] Furthermore, the diameter of coconut shell fibers is 0.14-0.16 mm.

[0024] Furthermore, the diameter of the suction pipe is 300mm;

[0025] The diameter of the spray nozzle is 100mm.

[0026] Furthermore, the spray nozzle sprays coconut shell fibers at a speed of 10-20 grams per second;

[0027] The speed at which the adhesive is sprayed from the spray nozzle is 15-20 grams per second;

[0028] The suction velocity of the suction pipe is 6000-20000 cubic meters per hour.

[0029] By adopting the above technical solution, this application has the following beneficial effects:

[0030] (1) By using a coconut fiber layer, the seat can reduce the backrest thickness by 10-20mm without reducing the comfort of the backrest, thereby increasing the remaining space in the vehicle and improving passenger comfort.

[0031] (2) Since the coconut fiber layer has good support and tear resistance, the comfort layer does not need to consider the support and tear resistance issues, so the comfort layer can be designed entirely according to the comfort needs of passengers.

[0032] (3) The coconut fiber layer has good breathability, and the breathability can be further improved after the comfort layer is perforated, so that the seat as a whole has good breathability.

[0033] (4) Based on the human body's comfort needs, different softness and hardness of comfort sponges are added to different parts of the backrest to improve the comfort of the seat.

[0034] (5) The composite structure of coconut fiber layer and comfort layer has higher tear strength, which improves the support, durability and protection of seat filling material.

[0035] (6) The equipment has a simple structure and low production cost.

[0036] (7) When the diameter of coconut shell fiber is 0.14-0.16mm, the tensile breaking strength can reach 2-6N, which is better than that of polyurethane foam sponge material of the same diameter.

[0037] (8) The tensile strength requirement for polyurethane foam backrest is ≥90kpa, and the tensile strength requirement for coconut fiber pad is ≥300kpa. Therefore, the thickness of coconut fiber backrest can be reduced while meeting the backrest usage requirements. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0039] Figure 1 An exploded view of a composite structure seat provided in an embodiment of this application;

[0040] Figure 2 A schematic diagram of the backrest comfort zone facing forward;

[0041] Figure 3 Left view of a conventional chair;

[0042] Figure 4 This is a left view of the seat in this application;

[0043] Figure 5 A left view comparing the existing technology with the seat of this application;

[0044] Figure 6 A three-dimensional structural diagram of a spraying equipment used for manufacturing seats;

[0045] Figure 7 This is a top view of the air agitator.

[0046] Figure 8 A top view of the air agitator mounted on the spray pipe;

[0047] Figure 9 This is a schematic cross-sectional view of the nozzle structure.

[0048] Figure 10 This is a front view of the inspection compaction device.

[0049] Figure label:

[0050] 11-Comfort layer; 12-Coconut shell fiber layer; 13-Support frame; 14-Ventilation hole; 15-Center zone; 16-Side zone; 21-Seat mold; 22-Spraying pipe; 23-Spraying adhesive pipe; 24-Suction pipe; 25-Sieve hole; 31-Mounting rail; 32-Power unit; 33-Blowing unit; 34-Rotating shaft; 35-Turntable; 36-Spraying nozzle; 37-Main inlet; 38-Support inlet; 41-Bracket; 42-Infrared transmitter; 43-Infrared receiver; 44-Pressure plate; 45-Motor; 46-Push rod; 47-Pressure sensor. Detailed Implementation

[0051] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0052] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0054] The present application will be further explained below with reference to specific implementation methods.

[0055] Example 1

[0056] like Figure 1 As shown, this embodiment provides a composite structure seat, including a comfort layer 11, a coconut fiber layer 12, and a support frame 13;

[0057] The supporting frame 13 is made of metal material, and the coconut shell fiber layer 12 is disposed on it.

[0058] A comfort layer 11 is provided on the side of the coconut shell fiber layer 12 away from the supporting frame 13;

[0059] The comfort layer 11 is made of a soft and breathable material.

[0060] The comfort layer 11 is made of any or more of the following materials: polyurethane foam, PET fiber, doll cotton, and hard cotton.

[0061] In the composite structure seat of this application, a metal support frame 13 provides overall support for the seat during use. In existing technologies, a thicker layer of polyurethane foam is required to separate the human body from the support frame 13, thereby mitigating the impact of the metal support frame 13 on the body. In this application, a coconut fiber layer 12 is placed in close contact with the support frame 13, which has the following three main advantages:

[0062] (1) Good air permeability: Coconut shell fiber mat is a three-dimensional mesh structure composed of countless coconut shell fibers in a disordered manner. Therefore, the product has a mesh structure and its ventilation and air permeability are better than those of polyurethane foam.

[0063] (2) High tensile strength and good support performance: Each coconut shell fiber is about 0.15mm in diameter and has a tensile breaking strength of 2-6N, which is better than polyurethane foam sponge material of the same diameter.

[0064] (3) Thinner backrest thickness: Each coconut fiber is approximately 0.15mm in diameter, with a tensile breaking strength of 2-6N, which is superior to that of polyurethane foam sponge of the same diameter. The tensile strength requirement for polyurethane foam sponge backrests is ≥90kPa, while the tensile strength requirement for coconut fiber pads is ≥300kPa. Therefore, the thickness of the coconut fiber backrest can be reduced while still meeting the backrest usage requirements.

[0065] Therefore, after using the coconut fiber layer 12, in addition to improving the overall performance of the seat, it also replaces part of the polyurethane foam material, thereby reducing the thickness of the seat. Furthermore, since the coconut fiber layer 12 provides good support and tear resistance for the seat, the comfort layer 11 does not need to consider support and tear resistance issues, allowing the comfort layer 11 to be designed entirely according to the comfort needs of passengers.

[0066] like Figure 2 The following is a further embodiment of this application, wherein the comfort layer 11 is provided with ventilation holes 14.

[0067] Since the seat of this application does not require the comfort layer 11 to provide tensile strength, perforations can be made in the comfort layer 11 to increase breathability. Furthermore, the coconut fiber layer 12 beneath the comfort layer 11 itself also possesses good breathability; the combination of the coconut fiber layer 12 and the comfort layer 11 further enhances the overall breathability of the seat.

[0068] As a further embodiment of this application, the comfort layer 11 also includes a backrest comfort area;

[0069] The backrest comfort zone includes a central zone 15 and a side zone 16 with different thicknesses;

[0070] The side zone 16 is thicker than the middle zone 15, which is used to improve the comfort of the backrest comfort zone.

[0071] In a preferred embodiment of this application, the thickness of the coconut shell fiber layer 12 is 10 mm;

[0072] The thickness of the central region 15 is 10 mm;

[0073] The thickness of the side region 16 is 20 mm.

[0074] In the case of a composite structure seat disclosed in this application, when a human body sits on it, the comfort layer 11 is compressed. A thinner central area 15 and a thicker side area 16 in the backrest comfort zone provides greater comfort. This application sets the thickness of the side area 16 to 20mm, and controls the indentation hardness of the material to below 2.5kPa. The coconut fiber layer 12 is set to a thickness of 10mm, with a tensile strength greater than or equal to 300kPa.

[0075] like Figure 3 The image shows a prior art seat, which, as can be seen from the figure, requires a relatively thick flexible material. This contrasts sharply with... Figure 4 The composite structure seat disclosed in this application, as shown, significantly reduces the thickness of the comfort layer 11 after using the coconut fiber layer 12.

[0076] like Figure 5 The image shows a superimposed comparison between a prior art seat and the composite structure seat of this application, demonstrating that the composite structure seat of this application has a thinner thickness.

[0077] By adopting the above technical solution, this application has the following beneficial effects:

[0078] (1) By using a coconut fiber layer, the seat can reduce the backrest thickness by 10-20mm without reducing the comfort of the backrest, thereby increasing the remaining space in the vehicle and improving passenger comfort.

[0079] (2) Since the coconut fiber layer has good support and tear resistance, the comfort layer does not need to consider the support and tear resistance issues, so the comfort layer can be designed entirely according to the comfort needs of passengers.

[0080] (3) The coconut fiber layer has good breathability, and the breathability can be further improved after the comfort layer is perforated, so that the seat as a whole has good breathability.

[0081] (4) Based on the human body's comfort needs, different softness and hardness of comfort sponges are added to different parts of the backrest to improve the comfort of the seat.

[0082] (5) The composite structure of coconut fiber layer and comfort layer has higher tear strength, which improves the support, durability and protection of seat filling material.

[0083] Example 2

[0084] like Figure 6 As shown, this embodiment discloses a spraying device for manufacturing the seat, including a seat mold 21, a spraying pipe 22, a glue spraying pipe 23, and a suction pipe 24;

[0085] The spray pipe 22 and the suction pipe 24 are respectively arranged on both sides of the seat mold 21;

[0086] The spray pipe 22 conveys coconut shell fibers and sprays the coconut shell fibers onto the seat mold 21;

[0087] The glue spray tube 23 is used to spray glue onto the seat mold 21;

[0088] The suction pipe 24 is used to guide airflow through the seat mold 21, thereby causing the coconut shell fibers to accumulate and mix with the adhesive to form a disordered three-dimensional mesh structure of coconut shell fiber layer.

[0089] The seat mold 21 is provided with a sieve hole 25, which is used to allow air to pass through the seat mold 21 and leave the coconut shell fiber on the seat mold 21;

[0090] The coconut shell fibers are curled to prevent them from passing through the sieve holes 25.

[0091] When the spraying equipment disclosed in this application is working, coconut shell fiber is sprayed from the spraying pipe 22 and adhesive is sprayed from the adhesive spraying pipe 23. The coconut shell fiber and adhesive are sprayed and mixed in a certain proportion so that the coconut shell fiber layer obtains better strength.

[0092] Existing coconut shell fiber materials are made by stacking coconut shell fibers in sheets, lacking the interlacing tensile strength between the layers. In contrast, the coconut shell fiber produced by the spraying equipment of this application is a three-dimensional mesh structure formed in one spraying process. Its internal structure is similar to that of a bird's nest, which not only has greater strength but also better air permeability.

[0093] In a preferred embodiment of this application, the diameter of the coconut shell fiber is 0.14-0.16 mm.

[0094] In a preferred embodiment of this application, the diameter of the suction pipe 24 is 300 mm;

[0095] The diameter of the spray nozzle 22 is 100mm.

[0096] In a preferred embodiment of this application, the spray nozzle 22 sprays coconut shell fibers at a speed of 10-20 grams per second;

[0097] The adhesive spraying speed of the spray tube 23 is 15-20 grams / second;

[0098] The suction speed of the suction pipe 24 is 6000-20000 cubic meters per hour.

[0099] like Figure 7 The following is a further embodiment of this application, wherein the spray pipe is further provided with an air stirring device;

[0100] The air stirring device includes a mounting rail 31, a power unit 32, and a blowing unit 33;

[0101] The mounting track 31 is ring-shaped and is fixedly sleeved on the spray pipe 22;

[0102] The blowing part 33 is fixedly connected to the power part 32;

[0103] The power unit 32 is slidably mounted on the mounting rail 31;

[0104] Driven by the power unit 32, the blower 33 can rotate around the mounting track 31 relative to the axis of the spray pipe 22.

[0105] The blower 33 blows air toward the seat mold 21 to stir the coconut fiber and adhesive material piled on the seat mold 21.

[0106] As a further embodiment of this application, each of the mounting tracks is provided with a plurality of power units 32 and air blowing units 33, which can stir the coconut shell fibers and adhesive materials piled on the seat mold 21 in multiple directions.

[0107] As a further embodiment of this application, the air outlet of the blowing section 33 is designed in a straight line shape. This design enables the coconut shell material and adhesive to be stirred in a blowing manner, further improving the stirring effect.

[0108] like Figure 8-9 In a further embodiment of this application, the spray pipe 22 is provided with a rotating shaft 34, a turntable 35 and a spray nozzle 36;

[0109] The turntable 35 is rotatably mounted on the rotating shaft 34;

[0110] One or more spray nozzles 36 are provided and are fixedly installed on the turntable 35;

[0111] The spray nozzle 36 includes a main nozzle 37 and a branch nozzle 38;

[0112] The main opening 36 faces vertically downwards;

[0113] The branch port 38 is located on one side of the main port 37, and its direction forms a 45-degree angle with the main port 37, and is in the same plane as the tangent direction of the spray nozzle 36 on the turntable 35.

[0114] When the spray nozzle 22 is working, the coconut shell fibers sprayed from the branch port 38 can provide the spray nozzle 36 with a real-time momentum in the tangential direction of the turntable 35, and cause the turntable 35 to rotate relative to the rotating shaft 34, so that the coconut shell fibers sprayed from the spray nozzle 36 form a spiral shape in the air, thereby improving the uniformity of spraying.

[0115] As a further embodiment of this application, one or more glue spray tubes 23 are provided, and the nozzle of each glue spray tube 23 is provided on the blower section 33.

[0116] Figure 8The arrow shown indicates a further embodiment of this application, wherein the rotation direction of the turntable 35 is opposite to the rotation direction of the air agitator.

[0117] The adhesive sprayed from the spray tube 23 on the blowing section 33 and the coconut shell fiber sprayed from the spray nozzle 36 form opposite spiral trajectories in the air and collide and mix in the air, thereby further improving the mixing degree of the adhesive and the coconut shell fiber.

[0118] like Figure 10 The illustration shows a further embodiment of this application, which also includes a compaction detection device;

[0119] The testing, compaction, and drilling equipment is detachably mounted on the seat mold 21, and includes a bracket 41 and a compaction section;

[0120] A pair of infrared transmitters 42 and infrared receivers 43 are installed on the inner side of the bracket;

[0121] The compaction section includes a pressure plate 44, a motor 45, a push rod 46, and a pressure sensor 47;

[0122] The pressure sensor 47 is disposed on the lower end surface of the pressure plate 44;

[0123] One end of the push rod 46 is fixedly connected to the upper end face of the pressure plate 44, and the other end is driven by the motor 45;

[0124] The motor 45 drives the push rod 46 to move downward, causing the pressure plate 44 to move downward and squeeze the coconut fiber layer on the seat mold 21;

[0125] The height of the infrared transmitter 42 and the infrared receiver 43 from the sieve hole 25 is the sum of the thickness of the coconut shell fiber layer 12 and the thickness of the pressure plate 44;

[0126] When the pressure plate 44 compresses the coconut shell fiber layer to a predetermined thickness, the infrared receiver 43 receives the infrared signal emitted by the infrared transmitter 42, the motor 45 stops driving, and the pressure sensor 46 detects the pressure.

[0127] As a further embodiment of this application, multiple pressure sensors 46 are provided and arrayed on the pressure plate 44.

[0128] In a preferred embodiment of this application, after the pressure sensor 46 detects pressure, if the pressure range is between 0.8 kPa and 7.5 kPa, then the coconut shell fiber layer 12 in the area corresponding to the pressure sensor 46 meets the standard; otherwise, it does not meet the standard.

[0129] When manufacturing a 10mm thick coconut shell fiber layer 12 using coconut shell fibers with a diameter of 0.14mm-0.16mm, if the pressure detected by the pressure sensor is less than 0.8kPa, it indicates that the density of the coconut shell fiber layer 12 is too low, and the tensile strength of the product is less than 90kPa. In contrast, the tensile strength of polyurethane foam material in existing polyurethane foam seats is greater than or equal to 90kPa. If the tensile strength of the coconut shell fiber layer 12 is less than that of existing polyurethane foam materials, the coconut shell fiber layer 12 of this application cannot replace the polyurethane foam material in the prior art and has no beneficial effect. Conversely, if the pressure exceeds 7.5kPa, the tensile strength of the coconut shell fiber layer 12 reaches 600kPa. Although it has high strength, its air permeability is significantly reduced, thereby decreasing the user experience and increasing manufacturing costs.

[0130] In a preferred embodiment of this application, to further improve the mechanical properties and comfort of the coconut fiber layer 12, the pressure value detected by the pressure sensor 46 should be limited to between 4.5 kPa and 6 kPa. At this point, the tensile strength of the coconut fiber layer 12 is greater than 300 kPa, and it has good air permeability. If the pressure detected by one or more of the pressure sensors 46 does not meet the standard, the coconut fiber layer 12 in that area should be repaired or discarded.

[0131] By adopting the above technical solution, this application has the following beneficial effects:

[0132] (1) The equipment has a simple structure and low production cost.

[0133] (2) When the diameter of coconut shell fiber is 0.14-0.16mm, the tensile breaking strength can reach 2-6N, which is better than that of polyurethane foam sponge material of the same diameter.

[0134] (3) The tensile strength requirement for polyurethane foam backrest is ≥90kpa, and the tensile strength requirement for coconut fiber pad is ≥300kpa. Therefore, the thickness of coconut fiber backrest can be reduced while meeting the backrest usage requirements.

[0135] (4) The coconut fiber and adhesive material piled on the seat mold are further stirred by setting up a wind stirring device.

[0136] (5) By setting up a testing and compaction device, the density of the coconut shell fiber layer can be tested, thereby enabling quality inspection and control of the product.

[0137] (6) By setting a rotating shaft, the turntable and the spray nozzle make the spray pipe spray coconut shell fiber more even.

[0138] (7) The design of the spray nozzle having a main port and a branch port enables the spray nozzle to automatically drive the turntable to rotate around the rotating shaft when spraying material, without the need for additional power components for rotation.

[0139] (8) The adhesive sprayed from the spray tube and the coconut shell fiber sprayed from the spray nozzle collide and mix in the air, further improving the mixing degree of the adhesive and the coconut shell fiber.

[0140] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A composite structure seat, characterized in that, Includes a comfort layer, a coconut fiber layer, and a support frame; The supporting frame is made of metal material and has the coconut shell fiber layer on it; A comfort layer is provided on the side of the coconut shell fiber layer away from the supporting frame; The comfort layer is made of a soft and breathable material.

2. The composite structure seat according to claim 1, characterized in that, The comfort layer has ventilation holes on top.

3. The composite structure seat according to claim 1, characterized in that, The comfort layer is made of one or more of the following materials: polyurethane foam, PET fiber, doll cotton, and hard cotton.

4. The composite structure seat according to claim 1, characterized in that, The comfort layer also includes a backrest comfort area; The backrest comfort zone includes a central zone and side zones with different thicknesses; The side zone is thicker than the middle zone, which is used to improve the comfort of the backrest comfort zone.

5. The composite structure seat according to claim 4, characterized in that, The thickness of the coconut shell fiber layer is 10 mm; The thickness of the central region is 10 mm; The thickness of the side region is 20 mm.

6. A spraying apparatus for producing seats according to any one of claims 1-5, characterized in that, This includes seat molds, spray nozzles, glue spray nozzles, and suction pipes; The spray pipe and the suction pipe are respectively arranged on both sides of the seat mold; The spray pipe conveys coconut shell fibers and sprays the coconut shell fibers onto the seat mold; The adhesive spray tube is used to spray adhesive onto the seat mold; The suction pipe is used to guide airflow through the seat mold, thereby causing the coconut shell fibers to accumulate and mix with the adhesive, forming a disordered three-dimensional mesh structure of coconut shell fiber layer.

7. The spraying equipment according to claim 6, characterized in that, The seat mold is provided with sieve holes to allow air to pass through the seat mold and leave the coconut shell fibers on the seat mold; The coconut shell fibers are curled to prevent them from passing through the sieve holes.

8. The spraying equipment according to claim 6, characterized in that, The diameter of coconut shell fibers is 0.14-0.16 mm.

9. The spraying device according to claim 6, characterized in that, The diameter of the suction pipe is 300mm; The diameter of the spray nozzle is 100mm.

10. The spraying device according to claim 6, characterized in that, The spray nozzle sprays coconut shell fibers at a speed of 10-20 grams per second; The speed at which the adhesive is sprayed from the spray nozzle is 15-20 grams per second; The suction velocity of the suction pipe is 6000-20000 cubic meters per hour.

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