Automobile sound insulation mat and production method thereof

Abstract

The application belongs to the technical field of automobile sound insulation mats, and particularly relates to an automobile sound insulation mat and a production method thereof, which comprises an upper felt body, a lower felt body, a support body and a heat preservation filling material. The upper felt body and the lower felt body are arranged side by side. The support body is arranged between the upper felt body and the lower felt body. Two opposite end surfaces of the support body are connected to the upper felt body and the lower felt body respectively. A filling cavity is arranged between the support body, the upper felt body and the lower felt body. A filling guide hole is arranged in the support body. One end of the filling guide hole is in communication with the filling cavity. The heat preservation filling material is arranged in the filling cavity. The volume of the heat preservation filling material after foaming is greater than the volume of the filling cavity. The application can guarantee heat preservation effect and sound insulation effect, and avoid the phenomenon of collapse of the sound insulation mat.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of automobile sound insulation pad, and particularly relates to an automobile sound insulation pad and a production method thereof. BACKGROUND

[0002] The automobile sound insulation pad is installed at a front wall cabin part of an automobile, and plays a role of heat insulation and sound insulation. In an era of pursuing high performance, environmental protection, energy saving, light weight and individualization, an interior of an automobile, like an appearance of the automobile, becomes an important factor for people to select and purchase the automobile. Therefore, requirements for the interior of the automobile are higher and higher.

[0003] However, the existing part of the sound insulation pad mainly has the following problems: 1, the sound absorption index cannot meet the requirements; 2, the heat preservation effect is poor, and even has no heat preservation effect. SUMMARY

[0004] The present application aims at the deficiencies of the prior art, and provides an automobile sound insulation pad, which can solve any of the above technical problems.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] An automobile sound insulation pad comprises an upper felt body, a lower felt body, a support body and a heat preservation filling material; the upper felt body and the lower felt body are arranged side by side; the support body is arranged between the upper felt body and the lower felt body; two opposite end surfaces of the support body are connected to the upper felt body and the lower felt body respectively; a filling cavity is arranged between the support body, the upper felt body and the lower felt body; a filling guide hole is arranged in the support body; one end of the filling guide hole is in communication with the filling cavity; the heat preservation filling material is arranged in the interior of the filling cavity; and the volume of the heat preservation filling material after foaming is greater than the volume of the filling cavity.

[0007] Preferably, the volume of the heat preservation filling material after foaming is greater than one-nineteenth to one-eighteenth of the volume of the filling cavity.

[0008] Preferably, the upper felt body comprises a first base plate, a first barrier film and a first adhesive which are sequentially and layerwisely arranged along a thickness direction; the first adhesive is connected to the support body.

[0009] And / or, the lower felt body comprises a second base plate and a second adhesive which are layerwisely arranged along a thickness direction; the second adhesive is connected to the support body; and the bottom of the first adhesive and the top of the second adhesive are respectively bonded to the heat preservation filling material.

[0010] Preferably, the upper felt body is provided with two first edge sections and at least one first raised section and at least one first recessed section arranged between the first edge sections; the first raised section and the first recessed section are arranged alternately; and the first raised section is provided with a first protrusion protruding towards the filling cavity; and the first recessed section is provided with a first groove recessed towards the upper felt body.

[0011] Preferably, the lower felt body is provided with two second edge sections and at least one second raised section and at least one second recessed section arranged between the second edge sections; the second raised section and the second recessed section are arranged alternately; and the second raised section is provided with a second protrusion protruding towards the filling cavity; and the second recessed section is provided with a second groove recessed towards the lower felt body.

[0012] Preferably, the thickness H1 of the second edge section, the thickness H2 of the second edge section and the thickness H3 of the support body satisfy the relationship H3= (H1+ H2)*(1 / 2~2 / 3).

[0013] Preferably, the length L4 of each first edge section, the length L1 of each first protrusion, the length L2 of each first groove and the length L3 of each first recessed section satisfy the relationship L1=L4+ L3+ L2.

[0014] Preferably, the length L8 of each second edge section, the length L5 of each second protrusion, the length L6 of each second groove and the length L7 of each second recessed section satisfy the relationship L8=L5+ L6+ L7.

[0015] The application further discloses a production method of the automobile sound insulation pad, which is used for producing the automobile sound insulation pad.

[0016] S1, performing jig hot pressing, adhesion and glue coating treatment on raw materials to form an upper felt body and a lower felt body.

[0017] S2, hoisting the upper felt body and the lower felt body to a filling device; and using a support body to be arranged between the upper felt body and the lower felt body for reinforcement treatment.

[0018] S3, filling the heat preservation filling material into the support body, the upper felt body and the lower felt body by using the filling device to form a sound insulation pad preliminary body.

[0019] S4, performing heating forming and cooling discharge on the sound insulation pad preliminary body to form a sound insulation pad completed body.

[0020] Preferably, the step of jigs hot-pressing, adhering and glueing the raw materials to form the upper felt body and the lower felt body comprises the following steps:

[0021] S11, jigs hot-pressing the raw materials to form the first substrate and the second substrate;

[0022] S12, adhering the first substrate to the first intermediate product of the first barrier film by barrier material;

[0023] S13, respectively glueing the first intermediate product and the second substrate to form the upper felt body and the lower felt body.

[0024] Preferably, the step of hoisting the upper felt body and the lower felt body to the filling device and using the support to place between the upper felt body and the lower felt body for reinforcing treatment comprises the following steps:

[0025] Transporting the lower felt body to the workbench of the filling device;

[0026] Transporting two supports to the upper surface of the lower felt body on the workbench;

[0027] Transporting the upper felt body to the upper surface of the support;

[0028] Driving the upper pressing plate to move to the upper surface of the upper felt body to realize extrusion adhesion of the upper felt body, the support and the lower felt body;

[0029] Sealing and plugging the front and rear ends of the whole formed by the upper felt body, the support and the lower felt body.

[0030] Preferably, in the step of heating forming and cooling discharging the sound insulation pad initial body,

[0031] The heating forming temperature is 150-180 DEG C, the cooling temperature is 13-18 DEG C, and the cooling time is 50s.

[0032] The beneficial effects of the present application are that, through the exhaust function of the upper felt body or the lower felt body, the gas in the foaming process of the thermal insulation filling material can be quickly discharged, the structure compactness of the thermal insulation filling material after foaming is improved, the excessive gaps or bubbles in the thermal insulation filling material are reduced, the thermal insulation effect and the sound insulation effect are guaranteed, and the collapse phenomenon of the sound insulation pad is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0033] The present application will be described below with reference to the accompanying drawings Figures 1-6Features, advantages, and technical effects of the exemplary embodiments of the present application are described.

[0034] Figure 1 Structure diagram of the automobile soundproofing mat of an embodiment of the present application;

[0035] Figure 2 Structure diagram of the automobile soundproofing mat of an embodiment of the present application;

[0036] Figure 3 Partial enlarged view of the automobile soundproofing mat of an embodiment of the present application;

[0037] Figure 4 Partial enlarged view of the automobile soundproofing mat of an embodiment of the present application;

[0038] Figure 5 Flow chart of the production method of the automobile soundproofing mat of an embodiment of the present application;

[0039] Figure 6 Flow chart of the production method of the automobile soundproofing mat of an embodiment of the present application.

[0040] In the figure: 1 - upper felt body; 11 - first base plate; 12 - first barrier film; 13 - first adhesive; 101 - first edge section; 102 - first convex section; 103 - first concave section; 104 - first convex block; 105 - first concave groove; 2 - lower felt body; 21 - second base plate; 23 - second adhesive; 201 - second edge section; 202 - second convex section; 203 - second concave section; 204 - second convex block; 205 - second concave groove; 3 - support body; 4 - heat preservation filling material; 5 - filling cavity. DETAILED DESCRIPTION

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the use of the terms "including," "comprising," "having" and "with" in the specification and claims herein are used to mean "including but not limited to"; the use of the terms "first," "second," and the like in the specification and claims herein is intended to modify, respectively, a "first," "second," and so forth item disclosed herein and does not denote or imply, unless otherwise indicated, either the relative importance of, or the number of or order of, importance of or steps had by, the specific quantities indicated with such nomenclature.

[0042] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the technical features indicated. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0043] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0044] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or multiple situations existing alone. In addition, the character " / " in this document generally indicates that the related objects before and after are in an "or" relationship.

[0045] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0046] The following is in conjunction with the appendix Figures 1-6 The present invention will be described in further detail, but this is not intended to limit the invention.

[0047] like Figure 1 As shown, in one embodiment of the present invention, the automotive sound insulation pad includes an upper felt body 1, a lower felt body 2, a support body 3, and a thermal insulation filling material 4; the upper felt body 1 and the lower felt body 2 are stacked and arranged side by side; there are at least two support bodies 3, which are arranged side by side between the upper felt body 1 and the lower felt body 2; and the two opposite end faces of each support body 3 are respectively connected to the upper felt body 1 and the lower felt body 2; a filling cavity 5 is provided between the support body 3, the upper felt body 1, and the lower felt body 2; a filling guide hole 31 is provided inside the support body 3; one end of the filling guide hole 31 communicates with the filling cavity 5; the other end of the filling guide hole 31 communicates with the outside of the support body 3; the thermal insulation filling material 4 is disposed inside the filling cavity 5; and the volume of the thermal insulation filling material 4 after foaming is greater than the volume of the filling cavity 5 and reaches the required density of the intermediate body of the automotive sound insulation pad.

[0048] The technical scheme of the present application can ensure that the gas generated during the foaming process of the thermal insulation filling material can be quickly discharged through the exhaust function of the upper felt body or the lower felt body, so as to improve the compactness of the thermal insulation filling material after foaming, thereby reducing the excessive gaps or bubbles in the thermal insulation filling material; and can ensure the thermal insulation effect and the sound insulation effect, and avoid the collapse of the sound insulation pad; in addition, the support function of the upper intermediate support body can further improve the structural stability; and improve the compactness of the structure; and ensure the thermal insulation effect and the sound insulation effect.

[0049] Specifically, in some embodiments, the volume of the thermal insulation filling material 4 after foaming is greater than one-nineteenth to one-eighteenth of the volume of the filling cavity 5. That is, by a certain range of filling amount, the bubbles generated during the filling process of the thermal insulation filling material can be effectively discharged, and excessive expansion can be avoided, thereby improving the structural stability and ensuring the processing safety.

[0050] Specifically, in some embodiments, the material of the support body 3 is the same as that of the thermal insulation filling material 4; and the material of the support body 3 is polyurethane foaming material; and the thermal insulation filling material 4 is polyurethane foaming material. The support body 3 and the thermal insulation filling material with the same material can be fused with each other during the foaming process, thereby further improving the overall structural stability and improving the thermal insulation efficiency.

[0051] Specifically, in some embodiments, as shown in Figure 1 and 2 the upper felt body 1 includes a first base plate 11, a first barrier film 12 and a first adhesive 13 which are sequentially stacked along the thickness direction; the first adhesive 13 is connected to the support body 3; the lower felt body 2 includes a second base plate 21 and a second adhesive 23 which are stacked along the thickness direction; the second adhesive 23 is connected to the support body 3; and the bottom of the first adhesive 13 and the top of the second adhesive 23 are respectively bonded to the thermal insulation filling material 4. Among them, the first adhesive 13 is selected from modal or matte silk or artificial hair and other fiber materials; the second adhesive 23 is selected from modal or matte silk or artificial hair and other fiber materials; the first barrier film 12 is selected from high-density polyethylene (HDPE) or high-density polypropylene (HDPP); the first base plate 11 is selected from foam or high polymer material or polyurethane rubber; and the second base plate 21 is selected from foam or ethylene-vinyl acetate copolymer (EVA). That is, through the efficient sound insulation of the upper felt body and the sound insulation and exhaust function of the lower felt body, the gas generated during the foaming process of the thermal insulation filling material can be quickly discharged, so as to improve the compactness of the thermal insulation filling material after foaming, thereby reducing the excessive gaps or bubbles in the thermal insulation filling material; and further improving the structural stability; and ensuring the thermal insulation effect and the sound insulation effect.

[0052] Specifically, in some embodiments, as shown in Figure 1 and 2 The upper felt 1 is provided with two first edge sections 101 and at least one first protruding section 102 and at least one first recessed section 103 arranged between the first edge sections 101; the first protruding section 102 and the first recessed section 103 are arranged alternately; and the first protruding section 102 is provided with a first protruding block 104 protruding towards the filling cavity 5; and the first recessed section 103 is provided with a first recess 105 recessed towards the body of the upper felt 1.

[0053] Specifically, in some embodiments, as shown in Figure 1 and 2 The lower felt 2 is provided with two second edge sections 201 and at least one second protruding section 202 and at least one second recessed section 203 arranged between the second edge sections 201; the second protruding section 202 and the second recessed section 203 are arranged alternately; and the second protruding section 202 is provided with a second protruding block 204 protruding towards the filling cavity 5; and the second recessed section 203 is provided with a second recess 205 recessed towards the body of the lower felt 2.

[0054] The projection of the second recess 205 towards the filling cavity 5 coincides with the projection of the first recess 105 towards the filling cavity 5; and the projection of the second protruding section 202 towards the filling cavity 5 coincides with the projection of the first protruding block 104 towards the filling cavity 5, so as to improve the convenience of processing operation and facilitate the protection of sound insulation effect.

[0055] Specifically, in some embodiments, as shown in Figure 2 The relationship between the thickness H1 of the second edge section 201, the thickness H2 of the second edge section 201 and the thickness H3 of the support body 3 satisfies: H3= (H1+ H2)*(1 / 2~2 / 3). That is, it can be: H3= (H1+ H2)*1 / 2; or H3= (H1+ H2)*2 / 3; or H3= (H1+ H2)*3.5 / 6, etc. This structure can ensure the stability of the overall structure and effectively save the materials of the heat preservation filling material and the support body 3.

[0056] Specifically, in some embodiments, as shown in Figure 2 and 3As shown in the first edge section 101, the length L4 of each first protrusion 104, the length L1 of each first groove 105, and the length L3 of each first recess section 103, satisfy the relationship: L1 = L4 + L3 + L2. The structure can increase the refraction amplitude of the noise transmission trajectory by the larger first protrusion 104 to reduce the loudness, and can continuously refract the noise transmission trajectory by the smaller depth and length of the first groove 105 to reduce the loudness, thereby achieving the sound insulation effect.

[0057] Specifically, in some embodiments, as shown in the first edge section 101, the length L4 of each first protrusion 104, the length L1 of each first groove 105, and the length L3 of each first recess section 103, satisfy the relationship: L1 = L4 + L3 + L2. The structure can increase the refraction amplitude of the noise transmission trajectory by the larger first protrusion 104 to reduce the loudness, and can continuously refract the noise transmission trajectory by the smaller depth and length of the first groove 105 to reduce the loudness, thereby achieving the sound insulation effect. Figure 2 and 4 As shown in the second edge section 201, the length L8 of each second protrusion 204, the length L5 of each second groove 205, and the length L7 of each second recess section 203, satisfy the relationship: L8 = L5 + L6 + L7. The structure can increase the refraction amplitude of the noise transmission trajectory by the larger second protrusion 204 to reduce the loudness, and can continuously refract the noise transmission trajectory by the smaller depth and length of the second groove 205 to reduce the loudness, thereby achieving the sound insulation effect.

[0058] The present application also provides a production method of the automobile sound insulation pad, which is used for manufacturing the automobile sound insulation pad. The specific structure of the automobile sound insulation pad is referred to the above-mentioned embodiments. Since the production method of the automobile sound insulation pad adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0059] Specifically, in some embodiments, as shown in the first edge section 101, the length L4 of each first protrusion 104, the length L1 of each first groove 105, and the length L3 of each first recess section 103, satisfy the relationship: L1 = L4 + L3 + L2. The structure can increase the refraction amplitude of the noise transmission trajectory by the larger first protrusion 104 to reduce the loudness, and can continuously refract the noise transmission trajectory by the smaller depth and length of the first groove 105 to reduce the loudness, thereby achieving the sound insulation effect. Figure 5 The production method of the automobile sound insulation pad comprises the following steps:

[0060] S1, the raw materials are subjected to jig hot pressing, adhesion, and glue coating treatment to form an upper felt body and a lower felt body;

[0061] S2, the upper felt body and the lower felt body are hoisted and transported to a filling device; and a support body is placed between the upper felt body and the lower felt body for reinforcement treatment;

[0062] S3, the heat preservation filling material is filled into the support body, the upper felt body, and the lower felt body by using the filling device to form a sound insulation pad initial body;

[0063] S4, the sound insulation pad initial body is subjected to heating forming and cooling discharge to form a sound insulation pad completed body.

[0064] Specifically, in some embodiments, as shown in the first edge section 101, the length L4 of each first protrusion 104, the length L1 of each first groove 105, and the length L3 of each first recess section 103, satisfy the relationship: L1 = L4 + L3 + L2. The structure can increase the refraction amplitude of the noise transmission trajectory by the larger first protrusion 104 to reduce the loudness, and can continuously refract the noise transmission trajectory by the smaller depth and length of the first groove 105 to reduce the loudness, thereby achieving the sound insulation effect. Figure 5and 6 As shown, in the S1, the step of jigs hot-pressing, adhering and glueing the raw materials to form the upper felt body and the lower felt body includes the following:

[0065] S11, jigs hot-pressing the raw materials to form the first substrate and the second substrate; wherein the raw materials are sent into an oven for softening by heating, the temperature of the heating zone of the oven is 200-210°C, and the softening time by heating is 225-240s; the raw materials softened by heating are pressed and cooled to form the first substrate and the second substrate; the forming pressure is 15-16MPa, the forming time is 120-140s, the cooling temperature is 18-25°C, and the cooling time is 30s;

[0066] S12, adhering the first substrate to the first barrier film to form the first intermediate product;

[0067] S13, respectively glueing the first intermediate product and the second substrate to form the upper felt body and the lower felt body; to form the upper felt body 1 with the first barrier film 12 and the first adhesive 13 on the first substrate 11, and the lower felt body 2 with the second adhesive 23 on the second substrate 21.

[0068] Specifically, in some embodiments, in the S2, the steps of hoisting the upper felt body and the lower felt body to the filling device, and using the support to place between the upper felt body and the lower felt body for reinforcement treatment include the following:

[0069] transporting the lower felt body to the workbench of the filling device;

[0070] transporting two supports to the upper surface of the lower felt body on the workbench;

[0071] transporting the upper felt body to the upper surface of the support;

[0072] driving the upper pressing plate to move to the upper surface of the upper felt body to realize the extrusion adhesion of the upper felt body, the support and the lower felt body as a whole;

[0073] sealing and plugging the front and rear ends of the whole formed by the upper felt body, the support and the lower felt body; to avoid leakage of the thermal filling material during the filling process; thereby ensuring the orderliness of processing and saving materials.

[0074] Specifically, in some embodiments, in the S3, the steps of using the filling device to fill the thermal filling material into the support, the upper felt body and the lower felt body include the following:

[0075] The filling device is used to fill the heat-insulating filling material from the filling guide hole 31 of the support body into the heat-insulating filling material, so that the support body, the upper felt body and the lower felt body are filled with the heat-insulating filling material.

[0076] Specifically, in some embodiments, in the S4, the step of heating forming and cooling discharging the soundproofing mat preliminary body,

[0077] The heating forming temperature is 150-180 ℃, the cooling temperature is 13-18 ℃, and the cooling time is 50 s.

[0078] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and the skilled in the art should be as a whole, the technical solutions in each embodiment can also be combined appropriately to form other embodiments which can be understood by those skilled in the art.

[0079] According to the disclosure and teaching of the above description, those skilled in the art of the present application can also make changes and modifications to the above embodiments. Therefore, the present application is not limited to the above specific embodiments, and any obvious improvement, replacement or modification made by those skilled in the art on the basis of the present application shall fall within the protection scope of the present application. In addition, although some specific terms are used in the present specification, these terms are only for the convenience of description and do not constitute any limitation on the present application.

Claims

1. A sound insulating mat for a vehicle, characterized by: The application relates to a kind of automobile sound insulation pads, including upper felt body, lower felt body, support body and heat preservation filling material;The upper felt body is arranged side by side with the lower felt body;The support body is arranged between the upper felt body and the lower felt body;And two opposite end surfaces on the support body are connected to the upper felt body, the lower felt body respectively;Filling cavity is arranged between the support body, the upper felt body and the lower felt body;Filling guide hole is arranged in the support body;One end of the filling guide hole is communicated with the filling cavity;The heat preservation filling material is arranged in the inside of the filling cavity;And the volume of the heat preservation filling material after foaming is greater than the volume of the filling cavity. The upper felt body is provided with two first edge sections and at least one first convex section and at least one first concave section arranged between the first edge sections;The first convex section and the first concave section are arranged alternately;And the first convex section is provided with a first protruding block protruding towards the filling cavity;The first concave section is provided with a first recess recessed towards the upper felt body body. And / or, the lower felt body is provided with two second edge sections and at least one second convex section and at least one second concave section arranged between the second edge sections;The second convex section and the second concave section are arranged alternately;And the second convex section is provided with a second protruding block protruding towards the filling cavity;The second concave section is provided with a second recess recessed towards the lower felt body. The relationship between the thickness H1 of the second edge section, the thickness H2 of the second edge section and the thickness H3 of the support body satisfies H3=(H1+H2)*(1 / 2~2 / 3). The relationship between the length L4 of each first edge section, the length L1 of each first protruding block, the length L2 of each first recess and the length L3 of each first concave section other than the first recess satisfies L1=L4+L3+L2. And / or, the relationship between the length L8 of each second edge section, the length L5 of each second protruding block, the length L6 of each second recess and the length L7 of each second concave section other than the second recess satisfies L8=L5+L6+L7.

2. The automotive sound deadener of claim 1, wherein: The volume of the heat preservation filling material after foaming is greater than one-nineteenth to one-eighteenth of the volume of the filling cavity.

3. The automotive sound deadener of claim 1, wherein: The upper felt body includes a first substrate, a first barrier film and a first adhesive arranged in sequence along the thickness direction;The first adhesive is connected to the support body. And / or, the lower felt body includes a second substrate and a second adhesive arranged in sequence along the thickness direction;The second adhesive is connected to the support body;And the bottom of the first adhesive and the top of the second adhesive are respectively bonded to the heat preservation filling material.

4. A method of producing an automotive sound deadening mat, characterized by: The application also discloses a production method of the automobile sound insulation pad. S1, fixture hot pressing, adhesion and glue coating are performed on raw materials to form the upper felt body and the lower felt body; S2, the upper felt body and the lower felt body are hoisted to the filling device;And the support body is arranged between the upper felt body and the lower felt body for reinforcement. S3, filling the thermal insulation filling material into the support body, the upper felt body and the lower felt body by using a filling device to form a sound insulation pad initial body; S4, heating forming and cooling discharging the sound insulation pad initial body to form a sound insulation pad completed body.

5. The method of claim 4, wherein: The step of tooling hot pressing, adhering and glueing the raw materials to form the upper felt body and the lower felt body comprises the following steps: S11, tooling hot pressing the raw materials to form a first substrate and a second substrate; S12, adhering the first substrate to a first intermediate product of the first barrier film to form a first substrate adhered to a first barrier film; S13, respectively glueing the first intermediate product and the second substrate to form the upper felt body and the lower felt body.

6. The method of claim 5, wherein: The step of hoisting the upper felt body and the lower felt body to the filling device and using the support body to place between the upper felt body and the lower felt body for reinforcing treatment comprises the following steps: transporting the lower felt body to the workbench of the filling device; transporting two support bodies to the upper surface of the lower felt body on the workbench; transporting the upper felt body to the upper surface of the support body; driving the upper pressing plate to move to the upper surface of the upper felt body to realize extrusion adhesion of the upper felt body, the support body and the lower felt body as a whole; sealing and plugging the front and rear ends of the whole formed by the upper felt body, the support body and the lower felt body.

7. The method of claim 5, wherein: In the step of heating forming and cooling discharging the sound insulation pad initial body, the temperature of heating forming is 150-180℃, the cooling temperature is 13-18℃, and the cooling time is 50s.

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