Multi-layer co-extrusion hot press molding equipment and process for automobile front wall sound insulation pad

Abstract

The invention discloses multi-layer co-extrusion hot press forming equipment and technology for an automobile front wall sound insulation pad, and relates to the technical field of sound insulation pad extrusion forming, the multi-layer co-extrusion hot press forming equipment comprises a feeding frame and an unwinding system with the two sides arranged on the feeding frame, the unwinding system comprises an unwinding frame and a material roller arranged on the unwinding frame, and a transmission mechanism is slidably connected to a sliding rail on the top of the feeding frame; the transmission mechanism comprises a sliding table slidably arranged on the sliding rail in a sleeving mode. A sliding cover is slidably connected to a rail on the side wall of the sliding table. Through the linkage design of the sliding table, the sliding cover and the swing frame, automatic taking, unfolding, selective gluing and stacking of PET cotton and heat-insulation and sound-insulation integrated felt are achieved, in the process, a laminated material is primarily compacted through the pressing roller at the normal temperature and then transferred to a high-temperature mold for final forming, material deformation caused by direct hot pressing is reduced, and the production efficiency is improved. And through equipment automation and process innovation, the interlayer bonding quality, the size stability and the production efficiency of the sound insulation pad are improved.

Description

Technical Field

[0001] This invention relates to the field of sound insulation pad extrusion molding technology, specifically to multi-layer co-extrusion hot pressing equipment and process for automotive front sound insulation pads. Background Technology

[0002] The front sound insulation pad of a car is a key component for controlling the NVH performance of a vehicle. Its core function is to block the transmission of engine compartment noise to the passenger compartment. At present, the front sound insulation pad of a car generally adopts a multi-layer composite structure, which utilizes the physical properties of different materials to achieve synergistic control of high and low frequency noise. Common structures include a damping layer, a sound-absorbing layer and a decorative layer. The damping layer is mostly made of high-density material to suppress low-frequency noise, while the sound-absorbing layer uses low-density material to absorb mid- and high-frequency noise. In existing technologies, the traditional process route of "step-by-step independent processing - manual stacking - single high-temperature hot pressing" is generally adopted. In terms of equipment, "single-function module splicing" is the main method. Although it can achieve composite molding of multi-layer materials, it has significant defects in actual large-scale production. The outer skin layer, PET cotton, and heat insulation and sound insulation integrated felt need to be processed to a certain size by independent cutting equipment first, and then manually stacked layer by layer in the hot pressing mold according to a preset order. Due to the flexible and wrinkle-prone nature of PET cotton and the uneven thickness of heat insulation and sound insulation integrated felt, problems such as interlayer misalignment, material wrinkles and uneven edges are easy to occur during manual operation. It cannot fundamentally solve the positioning problem of flexible and thick-walled materials. Therefore, we propose a multi-layer co-extrusion hot-pressing molding equipment and process for automotive front sound insulation pads. Summary of the Invention

[0003] The purpose of this invention is to provide a multi-layer co-extrusion hot pressing molding equipment and process for automotive front bulkhead sound insulation pads, thereby solving the problems mentioned in the background art; To achieve the above objectives, the present invention provides the following technical solution: a multi-layer co-extrusion hot pressing molding equipment for automotive front sound insulation pads, comprising a feeding frame and an unwinding system on both sides of the feeding frame. The unwinding system includes an unwinding frame and a material roller on the unwinding frame. A transmission mechanism is slidably connected to the top slide rail of the feeding frame. The transmission mechanism includes a slide table slidably sleeved on the slide rail. A sliding cover is slidably connected to the side wall track of the slide table. A motor is provided on the slide table, and a lead screw is installed at the end of the motor, passing through the sliding cover and driving the sliding cover to slide. A slide frame is slidably connected to the sliding cover. The rod on one side of the slide frame passes through the slide cover and is fixed at both ends with a clamping and conveying module. The clamping and conveying module consists of a motor-driven roller. The bottom of the slide cover is rotatably connected to a swing frame through a bearing. A rubber sleeve is slidably connected inside the swing frame, and a glue-applying roller is installed at the bottom of the rubber sleeve. A glue-feeding block is provided inside the swing frame and located inside the rubber sleeve. A spring is provided to abut against the glue-feeding block and the rubber sleeve. The unwinding system has a material feeding module installed at the end of the unwinding frame, and a feeding platform is provided at the bottom of the feeding frame. A receiving platform is slidably connected to the side of the feeding platform.

[0004] Furthermore, the material conveying module includes a roller at the end of the unwinding frame and a shearing machine on the side of the roller, with the roller at the end of the unwinding frame corresponding to the roller inside the material conveying module on the slide.

[0005] Furthermore, the transmission mechanism also includes cylinders symmetrically rotatably connected on both sides of the sliding cover, and the cylinders slide against the rods extending from the swing frame.

[0006] Furthermore, a pressure roller is movably connected to one side of the inner wall of the swing frame, and a rubber sleeve is slidably connected to the other side. The rubber sleeve abuts against the groove in the inner wall of the swing frame, and a glue-applying roller is provided at the bottom of the rubber sleeve, corresponding to the bottom inner wall of the sliding cover.

[0007] Furthermore, a limit box is fixed to one side of the sliding cover by bolts, and positioning clamps are symmetrically fixed inside the limit box. A collar is slidably connected between the positioning clamps, and a steel wire is fixed to the bottom of the collar. The steel wire passes through the limit box and is connected to the glue conveying block.

[0008] Furthermore, limit posts are symmetrically arranged on the sliding cover and on both sides of the sliding table. One end of each limit post passes through the sliding cover, the limit box, and the collar, and the limit post is located inside the limit box with the rod body bent.

[0009] The sound insulation pad for the front of the car is manufactured using a multi-layer co-extrusion hot-pressing process: After the pre-coated adhesive is pressed after being distributed and piled up, the surface layer after the adhesive coating is applied is moved to the receiving platform using the feeding table at the bottom of the feeding rack, and the surface layer on the receiving platform is controlled to move to the middle of the feeding rack. The material rollers containing heat insulation and sound insulation felt and PET cotton are pre-installed on the unwinding frame of the unwinding system. The materials pass through the rollers on the material cutting conveyor module. As the slide table on the transmission mechanism moves, the slide frame on the side of the slide cover is squeezed to the position of the PET cotton side roller. At this time, the rollers on the material cutting conveyor module and the clamping conveyor module rotate to complete the clamping and conveying of PET cotton at the bottom of the slide cover. After being cut to size, the slide table moves along the PET cotton to the unwinding mechanism on the other side, causing the other side of the slide to be squeezed. This pushes the PET cotton to unfold in the clamping conveyor module and the bottom of the swing frame. At the same time, the cylinders on both sides of the slide cover contract, and the rubber sleeve at the bottom of the swing frame presses down to contact the PET cotton. As the PET cotton moves, it drives the coating roller to rotate, and the adhesive is evenly applied to the surface of the PET cotton. Finally, the PET cotton with adhesive on top unfolds and moves to the top of the skin layer as the slide table drives the slide cover. With the cylinder and the roller rotating, the adhesive-coated PET cotton covers the top of the skin layer. Then, the material conveying module on the slide is moved to the side roller position of the heat insulation and sound insulation integrated felt to complete the conveying of the heat insulation and sound insulation integrated felt. With the help of the swing frame and the material conveying module, the heat insulation and sound insulation integrated felt is clamped on both sides. At this time, the rubber sleeve moves during the movement of the limit post, causing the glue conveying block to move upward, which simultaneously drives the rubber sleeve to retract into the swing frame. When the cylinder works, it drives the retracted sleeve to enter the inner shell of the swing frame and press down. With the help of the slide table movement, the heat insulation and sound insulation integrated felt is unfolded again without the heat insulation and sound insulation integrated felt being coated with glue. Then, the heat insulation and sound insulation integrated felt is covered on the glued PET cotton. At this time, the cylinder pushes the swing frame to rotate, pressing the heated pressure roller onto the stacked materials. With the help of the slide table movement, the initial forming of the car front sound insulation pad is completed. Hot pressing molding is performed, and then the stacked sound insulation pads are placed in the molding mold through the receiving platform. They are then molded at a high temperature of 180℃-220℃. After cooling, they form a three-dimensional shape of the car front sound insulation pad, and then the edges are trimmed.

[0010] Compared with the prior art, the beneficial effects of the present invention are: This invention improves automation and molding accuracy, avoiding errors from manual stacking. By integrating a feeding rack, unwinding system, transmission mechanism, and clamping and conveying module, it achieves automatic conveying, positioning, gluing, and stacking of multi-layer materials, such as PET cotton, heat insulation and sound insulation integrated felt, and outer skin layer. The equipment utilizes the coordinated movement of slides, slide covers, and cylinders to precisely control the material unfolding and covering process, avoiding problems such as misalignment and deformation that are easily caused by traditional manual layer-by-layer stacking. It significantly improves the molding consistency and dimensional stability of the sound insulation pad, laying a reliable foundation for subsequent high-temperature hot pressing molding. This invention optimizes the gluing process and hot pressing flow, enhancing production efficiency and product quality. The equipment features intelligent gluing capabilities, achieving selective gluing through the coordinated design of the swing frame, rubber sleeve, and limiting columns. It applies gluing only to PET cotton while leaving the integrated heat insulation and sound insulation felt uncoated, ensuring interlayer bonding strength and preventing adhesive contamination or impact on material properties. Simultaneously, the combination of preliminary hot pressing and final high-temperature molding allows the sound insulation pad to be formed in three dimensions in one step, reducing subsequent processing steps, improving production efficiency and product integrity. After final trimming, it meets the high standards required for automotive front sound insulation pads. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the multi-layer co-extrusion hot pressing molding equipment for automotive front sound insulation pads according to the present invention; Figure 2 This is a side view of the multi-layer co-extrusion hot pressing molding equipment for automotive front sound insulation pads according to the present invention; Figure 3 This is a schematic diagram of the material conveying structure of the clamping conveyor module and the interrupted material conveyor module of the present invention. Figure 4This is a top view of the multi-layer co-extrusion hot pressing molding equipment for automotive front sound insulation pads according to the present invention; Figure 5 This is a schematic diagram of the overall structure of the transmission mechanism of the present invention; Figure 6 This is a schematic diagram of the installation structure of the inner rubber sleeve and the coating roller of the swing frame of the present invention; Figure 7 This is a schematic diagram of the steel wire connecting glue delivery block structure installed inside the limiting box of the present invention; Figure 8 This is a schematic diagram of the installation structure of the limiting post located inside the limiting box according to the present invention.

[0012] In the diagram: 1. Feeding rack; 2. Unwinding system; 3. Material break conveying module; 4. Transmission mechanism; 401. Slide table; 402. Slide cover; 403. Cylinder; 404. Swing frame; 405. Slide frame; 406. Clamping conveying module; 5. Feeding platform; 6. Receiving platform; 7. Limit box; 8. Positioning clamp; 9. Limit post; 10. Ring; 11. Steel wire; 12. Rubber sleeve; 13. Glue roller; 14. Glue conveying block; 15. Spring; 16. Pressure roller. Detailed Implementation

[0013] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0014] Please see Figure 1-8 The present invention provides a technical solution: Example 1: The sound insulation pad for the front of a car is not a single layer of material, but a multi-layer composite material system. Its core principle is to use the physical properties of different materials to suppress vibration, noise and heat respectively. A complete car sound insulation project usually includes the following three core structures, which work together to achieve the best effect. These three layers are typically damping, sound absorption, and decorative layers. The damping layer is often an integrated damping and sound insulation board, also known as the integrated heat and sound insulation felt mentioned in this application. The damping and sound insulation layers are pre-pressed together, and during construction, the adhesive backing is peeled off and the board is directly applied to the car body panel. As for the subsequent sound absorption and decorative layers, they are glued and hot-pressed together. Common processes involve layer cutting and stacking. Due to the influence of the sound insulation pad material, manual stacking on the mold in sequence is often used, which is risky. Therefore, the sound insulation pad prototype is prepared by pre-hot pressing. Taking advantage of the thickness of the stacked material and the high regularity during transportation, a robotic arm is used to grab and load the material, solving the problem of misalignment and deformation that easily occurs when covering the material layer by layer. like Figure 1 As shown, the entire feeding rack 1 adopts a single-layer bottom feeding method, which is combined with the left and right movement of the middle transmission mechanism 4 to complete the acquisition of sound insulation pad preparation material on both sides of the material roller. At the same time, the movement process also carries out corresponding glue application and hot pressing work, further improving the overall sound insulation pad pre-preparation efficiency. like Figure 2 and Figure 3 As shown, the impact misalignment is used in conjunction with the material cutting conveyor module 3 on both sides and the clamping conveyor module 406 to complete the acquisition of the prepared material on the single-sided unwinding system 2. The slide table 401 on the transmission mechanism 4 is driven left and right by the motor connected to the lead screw. Similarly, the lead screw drives the slide table 401 with the outer sleeve of the slide cover 402 to move up and down, so as to realize the subsequent material grabbing and unwinding work. For material acquisition on a single-sided roller, the material needs to be pre-installed and pulled out from the material cutting conveyor module 3. This module drives the roller to rotate, actively completing the material conveying. In conjunction with the shearing machine, it cuts the material to a fixed length. When the single-sided slide 405 on the slide table 401 contacts the roller, the roller on the clamping conveyor module 406 aligns with the roller on the material cutting conveyor module 3. At this point, both rollers rotate simultaneously, completing the material conveying. Figure 3 As shown, the material roller on the left is PET cotton, while the material feeding platform 5 moves to the receiving platform 6 and is placed with an adhesive decorative layer. The top of the PET cotton is coated with adhesive, and the top of the PET cotton also needs to be coated with adhesive to facilitate the subsequent bonding of the heat insulation and sound insulation integrated felt. As the rollers rotate, the cutting machine obtains a fixed size and cuts the PET cotton. At this time, the PET cotton extends and hangs from the side of the clamping conveyor module 406, and a swing frame 404 is set on its top. When applying glue, simply drive the slide table 401 to move to the right. After the clamping conveyor module 406 on the other side of the slide 405 contacts the heat insulation and sound insulation integrated felt side cutting conveyor module 3, it is limited and the slide 405 remains stationary, while the slide table 401 continues to move to the right. At this time, the left clamping conveyor module 406 will pull the PET cotton to unfold between the slide covers 402, and one end is clamped by the roller of the cutting conveyor module 3. At this time, the cylinder 403 moves up to drive the swing frame 404 to rotate, and the glue application roller 13 at the bottom of the rubber sleeve 12 presses and squeezes the top of the PET cotton. like Figure 7 As shown, a rubber sleeve 12 is slidably connected inside the swing frame 404, and a glue conveying block 14 is provided on the rubber sleeve 12. The two are separated by a spring 15. Glue is continuously discharged into the rubber sleeve 12 through the glue conveying block 14, and a steel wire 11 is fixed to the top of the glue conveying block 14. The steel wire 11 is fixed to a collar 10 provided inside the limit box 7. Figure 8 As shown, by setting the rubber sleeve 12 inside the swing frame 404, the swing frame 404 is rotated by the cylinder 403, as... Figure 6 As shown, the swing frame 404 rotates downwards at this time, while driving the rubber sleeve 12 to move down on the surface of the glue supply block 14. Then, the glue coating roller 13 at the bottom of the rubber sleeve 12 comes into contact with the PET cotton on the bottom inner wall of the slide cover 402. As the slide table 401 continues to move, the glue coating roller 13 rolls on the top of the PET cotton, continuously rolling and applying the glue inside the rubber sleeve 12 to the top of the PET cotton. With the movement of the slide table 401 and the downward drive of the slide cover 402, the glued PET cotton that is finally separated from the roller and squeezed by the glue coating roller 13 is stacked and covered with the decorative layer on the receiving table 6.

[0015] Example 2: For bonding the PET cotton with top adhesive to the heat insulation and sound insulation integrated felt, the slide table 401 needs to move the slide cover 402 to the other side to contact the unwinding system 2 on the feeding rack 1 that stores the heat insulation and sound insulation integrated felt. At the same time, it is necessary to avoid the adhesive roller 13 at the bottom of the rubber sleeve 12 applying adhesive to the top of the heat insulation and sound insulation integrated felt during the material picking process. When the heat insulation and sound insulation integrated felt is picked up, the limiting post 9 on the limiting box 7 moves to constrain the position of the rubber sleeve 12. When obtaining the specific integrated heat insulation and sound insulation felt, refer to Example 1 and the attached... Figure 2 and Figure 3 When the slide 405 extends to the right and reaches its final position, the upper limit post 9 of the limit box 7 comes into contact with the collar 10 due to the contact of the right-side clamping conveyor module 406. Figure 8As shown, because the collar 10 is constrained by the positioning clamp 8, when the limit rod moves, the upper convex part contacts the collar 10 and drives the collar 10 to move upward. The bottom of the collar 10 is connected to the glue supply block 14 by the steel wire 11. Figure 7 It can be understood that when the glue conveying block 14 moves upward, it drives the rubber sleeve 12 sleeved on its outside to move upward. Using the spring 15 set between the two, the glue application roller 13, which originally protruded from the swing frame 404, enters the inside of the swing frame 404. When the cylinder 403 contracts and drives the swing frame 404 to rotate and press the heat insulation and sound insulation integrated felt, the rubber sleeve 12 and the glue application roller 13 inside the swing frame 404 move downward synchronously. At this time, the glue application roller 13 is located inside the swing frame 404. The direct contact and pressing of the top of the heat insulation and sound insulation integrated felt is changed to the swing frame 404 instead of the glue application roller 13. Therefore, when the subsequent clamping and conveying module 406 drives the heat insulation and sound insulation integrated felt obtained from the bottom of the sliding cover 402 to unfold, the heat insulation and sound insulation integrated felt slides at the bottom of the swing frame 404, and there is no glue application operation, ensuring that the top of the heat insulation and sound insulation integrated felt is clean. As the slide table 401 and the clamping and conveying module 406 work, the heat insulation and sound insulation integrated felt is precisely placed on top of the glued PET cotton. At this time, as the cylinder 403 extends, it pushes the pressure roller 16 installed on the swing frame 404 to move down. When it comes into contact with the three-layer automotive front sound insulation pad material, it moves as a whole in conjunction with the transmission mechanism 4, squeezing the automotive front sound insulation pad and completing the initial forming of the automotive front sound insulation pad. Subsequently, the stacked sound insulation pad is placed in the forming mold through the receiving table 6 and formed by high temperature and pressure at 180℃-220℃. After cooling, it forms the three-dimensional shape of the automotive front sound insulation pad and then undergoes edge trimming.

[0016] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

[0017] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0018] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-layer co-extrusion hot pressing molding equipment for automotive front bulkhead sound insulation pads, comprising a feeding frame (1) and an unwinding system (2) arranged on both sides of the feeding frame (1), the unwinding system (2) comprising an unwinding frame and material rollers arranged on the unwinding frame, characterized in that, The feeding rack (1) has a transmission mechanism (4) slidably connected to the top slide rail. The transmission mechanism (4) includes a slide table (401) slidably sleeved on the slide rail. A slide cover (402) is slidably connected to the side rail of the slide table (401). A motor is installed on the slide table (401), and a lead screw is installed at the end of the motor, which passes through the slide cover (402) and drives the slide cover (402) to slide. A slide frame (405) is slidably connected to the slide cover (402). The rod on one side of the slide (405) passes through the slide cover (402) and is fixed at both ends with a clamping and conveying module (406). The clamping and conveying module (406) is composed of a motor-driven roller. The bottom of the slide cover (402) is rotatably connected to a swing frame (404) through a bearing. A rubber sleeve (12) is slidably connected inside the swing frame (404), and a glue-applying roller (13) is installed at the bottom of the rubber sleeve (12). A glue-feeding block (14) is provided inside the swing frame (404) and located inside the rubber sleeve (12). A spring (15) is abutting between the glue-feeding block (14) and the rubber sleeve (12). The unwinding system (2) is equipped with a material break conveying module (3) at the end of the unwinding frame, and the feeding frame (1) is provided with a feeding platform (5) at the bottom, and the feeding platform (5) is slidably connected to a receiving platform (6).

2. The multi-layer co-extrusion hot pressing molding equipment for automotive front bulkhead sound insulation pads according to claim 1, characterized in that, The material conveying module (3) includes a roller at the end of the unwinding frame and a shearing machine on the side of the roller. The roller at the end of the unwinding frame is correspondingly arranged with the roller inside the material conveying module (406) on the slide (405).

3. The multi-layer co-extrusion hot pressing molding equipment for automotive front bulkhead sound insulation pads according to claim 2, characterized in that, The transmission mechanism (4) also includes cylinders (403) symmetrically rotated on both sides of the slide cover (402), and the cylinders (403) slide against the rod extending from the swing frame (404).

4. The multi-layer co-extrusion hot pressing molding equipment for automotive front bulkhead sound insulation pads according to claim 3, characterized in that, The inner wall of the swing frame (404) is movably connected to a pressure roller (16) on one side and slidably connected to a rubber sleeve (12) on the other side. The rubber sleeve (12) abuts against the groove on the inner wall of the swing frame (404), and a glue-applying roller (13) is provided at the bottom of the rubber sleeve (12) and is correspondingly provided on the bottom inner wall of the sliding cover (402).

5. The multi-layer co-extrusion hot pressing molding equipment for automotive front bulkhead sound insulation pads according to claim 4, characterized in that, The sliding cover (402) is fixed to a limiting box (7) by bolts on one side. The limiting box (7) is symmetrically fixed with positioning clamps (8). A collar (10) is slidably connected between the positioning clamps (8). A steel wire (11) is fixed at the bottom of the collar (10), and the steel wire (11) passes through the limiting box (7) and is connected to the glue conveying block (14).

6. The multi-layer co-extrusion hot pressing molding equipment for automotive front bulkhead sound insulation pads according to claim 5, characterized in that, Limiting posts (9) are symmetrically arranged on the sliding cover (402) and on both sides of the sliding table (401). One end of the limiting post (9) passes through the sliding cover (402), the limiting box (7) and the collar (10) respectively. The limiting post (9) is located inside the limiting box (7) with the rod body bent.

7. The multi-layer co-extrusion hot pressing molding equipment for automotive front bulkhead sound insulation pads according to claim 6, characterized in that, The sound insulation pad for the front of the car is manufactured using a multi-layer co-extrusion hot-pressing process: After the pre-coated adhesive is pressed after the material is distributed and piled up, the skin layer after the adhesive coating is applied is moved to the receiving platform (6) by the feeding table (5) at the bottom of the feeding rack (1), and the skin layer on the receiving platform (6) is moved to the middle of the feeding rack (1). The rollers containing heat insulation and sound insulation felt and PET cotton are pre-installed on the unwinding frame of the unwinding system (2). The materials pass through the rollers on the material cutting conveyor module (3). As the slide table (401) on the transmission mechanism (4) moves, the side slide frame (405) of the slide cover (402) is squeezed to the position of the PET cotton side roller. At this time, the rollers on the material cutting conveyor module (3) and the clamping conveyor module (406) rotate to complete the clamping and conveying of PET cotton at the bottom of the slide cover (402). After being cut to size, the slide table (401) carries the PET cotton to the unwinding mechanism on the other side, causing the slide frame (405) to be squeezed on the other side, pushing the PET cotton to unfold at the bottom of the clamping conveyor module (406) and the swing frame (404). At the same time, the cylinders (403) on both sides of the slide cover (402) contract, and the rubber sleeve (12) at the bottom of the swing frame (404) presses down to contact the PET cotton. While the PET cotton moves, it drives the coating roller (13) to rotate, and the adhesive is evenly applied to the surface of the PET cotton. Finally, the PET cotton coated on the top unfolds and moves to the top of the skin layer as the slide table (401) drives the slide cover (402). The cylinder (403) cooperates with the roller to rotate, covering the top of the skin layer with the coated PET cotton. Then, the material conveying module (406) on the slide (405) is moved to the side roller position of the heat insulation and sound insulation integrated felt to complete the conveying of the heat insulation and sound insulation integrated felt. In conjunction with the swing frame (404) and the material conveying module (406), the heat insulation and sound insulation integrated felt is clamped on both sides. At this time, the rubber sleeve (12) moves during the movement of the limit post (9), causing the rubber conveying block (14) to move upward, which simultaneously drives the rubber sleeve (12) to retract into the swing frame (404). When the cylinder (403) works, The retracted inner shell of the swing frame (404) is pressed down, and the slide table (401) moves to complete the unfolding of the heat insulation and sound insulation integrated felt again without applying glue to the heat insulation and sound insulation integrated felt. Then the heat insulation and sound insulation integrated felt is covered on the glued PET cotton. At this time, the cylinder (403) pushes the swing frame (404) to rotate, and the heated pressure roller (16) is pressed on the stacked material. With the movement of the slide table (401), the initial hot pressing of the car front sound insulation pad is completed. Then, the stacked sound insulation pads are placed in the molding mold through the receiving platform (6), and molded at a high temperature of 180℃-220℃. After cooling, they form a three-dimensional shape of the car front sound insulation pad, and then the edges are trimmed.

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