Novel structure for replacing metal plate support and cavity sound insulation block

Abstract

The utility model belongs to the technical field of injection molding products, and particularly relates to a novel structure for replacing a metal plate support and a cavity sound insulation block, which comprises a PA (polyamide) main body layer, an SNS (social networking site) enhancement layer and an EVA (ethylene-vinyl acetate) sound insulation layer which are compounded to form an integrated component, the PA main body layer is used for being attached to the inner wall of a vehicle body metal plate cavity, the SNS enhancement layer is embedded into the PA main body layer to provide structural strength, and the EVA sound insulation layer covers the outer side of the PA main body layer; a buckle structure is arranged on the PA main body layer, and the PA main body layer is clamped and fixed with a preset mounting position of a vehicle body metal plate cavity through the buckle structure. Independent arrangement of a traditional metal plate support and a cavity sound insulation block is replaced, integration of the structure reinforcing function and the sound insulation and noise reduction function is achieved, the welding technology is replaced with buckle type fixing, the installation process is remarkably simplified, and the working hour cost and the material cost are reduced.

Description

Technical Field

[0001] This utility model belongs to the field of injection molding product technology, specifically relating to a novel structure that replaces sheet metal brackets and hollow sound insulation blocks. Background Technology

[0002] In the automotive body manufacturing field, existing technologies typically employ sheet metal brackets and PA+EVA type cavity sound insulation blocks to achieve structural reinforcement and sound insulation of the sheet metal cavities, respectively. Sheet metal brackets require welding installation, which is not only complex and time-consuming but may also damage the sheet metal surface and increase subsequent processing costs. Cavity sound insulation blocks, on the other hand, require independent fabrication and installation, leading to an increase in the number of parts, cumbersome assembly processes, and a significant rise in material and labor costs.

[0003] In the existing solutions described above, the sheet metal bracket and the sound insulation block are functionally independent and manufactured separately, resulting in a cumbersome assembly process, low production efficiency, and the combined cost of components and installation further increases the overall vehicle manufacturing cost. Furthermore, their independent arrangement may occupy more body space, hindering lightweight vehicle design. Therefore, an integrated structure is urgently needed to simultaneously achieve reinforcement and sound insulation functions, simplifying the installation process and reducing costs. Utility Model Content

[0004] The purpose of this utility model is to provide a novel structure to replace sheet metal brackets and hollow sound insulation blocks, so as to solve the problems existing in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a novel structure to replace sheet metal brackets and cavity sound insulation blocks, comprising a PA main body layer, an SNS reinforcement layer, and an EVA sound insulation layer, which are composited to form an integrated component; the PA main body layer is used to fit the inner wall of the body sheet metal cavity, the SNS reinforcement layer is embedded in the PA main body layer to provide structural strength, and the EVA sound insulation layer covers the outer side of the PA main body layer; the PA main body layer is provided with a snap-fit ​​structure, which is snapped and fixed to a preset mounting position in the body sheet metal cavity.

[0006] Preferably, the SNS reinforcing layer and the PA main body layer are injection molded.

[0007] Preferably, the snap-fit ​​structure includes an elastic hook, slot, or boss disposed on the edge of the PA main body layer, and the snap-fit ​​structure is interference-fitted with the snap-fit ​​groove or mounting hole on the inner wall of the body sheet metal cavity.

[0008] Preferably, the shape of the novel structure is adapted to the inner wall contour of the body sheet metal cavity, and the cross-section is U-shaped, L-shaped or planar.

[0009] The beneficial effects of this utility model are as follows: This utility model, through the integrated composite structure of PA main layer, SNS reinforcement layer and EVA sound insulation layer, not only replaces the independent setting of traditional sheet metal bracket and cavity sound insulation block, realizing the integration of structural reinforcement and sound insulation and noise reduction functions, but also significantly simplifies the installation process and reduces labor and material costs by replacing welding process with snap-on fixing; at the same time, this structure does not require additional welding treatment, avoiding damage to the sheet metal surface, and the integrated design reduces the number of parts and assembly processes, improving production efficiency. Its adaptable shape and lightweight material combination can further optimize the utilization rate of vehicle body space, meeting the needs of cost reduction and efficiency improvement and lightweight design in automobile manufacturing. Attached Figure Description

[0010] Figure 1 This is a structural diagram of the present invention;

[0011] Figure 2 This is an exploded view of the present invention. Detailed Implementation

[0012] In the description of this disclosure, it should be understood that the terms “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0013] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0014] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing" 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, an electrical connection, or a communication 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. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0015] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings and preferred embodiments.

[0016] like Figures 1-2 As shown, a novel structure that replaces sheet metal brackets and cavity sound insulation blocks includes a PA main body layer 1, an SNS reinforcement layer 2, and an EVA sound insulation layer 3, which are combined to form an integrated component.

[0017] The PA main layer is used to fit the inner wall of the body sheet metal cavity. It has a thickness of 1.5-3mm and serves as the outermost layer to provide structural rigidity support, replacing the reinforcement function of the original sheet metal bracket.

[0018] The SNS reinforcement layer is embedded in the PA main body layer to provide structural strength. It has a thickness of 0.5-1mm and is bonded to the PA main body layer by hot pressing to form a buffer transition layer.

[0019] The EVA sound insulation layer covers the outside of the PA main body layer; it is 1mm thick and has a honeycomb porous structure pressed on the surface. It is bonded to the outside of the PA main body layer with hot melt adhesive. The porous structure can effectively absorb sound wave vibrations in the cavity.

[0020] The PA main body layer is provided with a snap-fit ​​structure 4, which is used to snap and fix it to the preset mounting position in the cavity of the body sheet metal 5. Specifically, two sets of elastic hooks (made of PA material in one piece) are symmetrically arranged on the edge of the PA main body layer. The ends of the hooks are barbed and are interference-fitted with the U-shaped mounting grooves preset on the inner wall of the body sheet metal cavity. During installation, the hooks are compressed and undergo elastic deformation, embedding into the groove and then resetting and locking, achieving welding-free fixation.

[0021] The PA main layer and the SNS reinforcement layer form a composite support frame: When the body sheet metal is subjected to external vibration, the fiber mesh of the SNS reinforcement layer distributes the load to the PA main layer through the resin matrix, suppressing the deformation of the sheet metal; the rigidity of the PA main layer, combined with the fixing effect of the buckle, connects the sheet metal on both sides of the cavity into a whole, effectively replacing the reinforcement function of the traditional sheet metal bracket.

[0022] The honeycomb porous structure of the EVA sound insulation layer achieves sound insulation through two mechanisms:

[0023] Sound wave absorption: After sound waves enter the porous structure, they are reflected multiple times within the pores and rubbed against EVA molecules, converting sound energy into heat energy and consuming it.

[0024] Vibration damping: The viscoelastic properties of EVA material can attenuate the vibration energy transmitted by the sheet metal, reduce resonance noise in the cavity, and effectively replace the function of traditional PA+EVA sound insulation blocks.

[0025] Compared to traditional solutions, the new structure replaces welding with snap-fit ​​connections: during installation, the snap-fit ​​hooks are simply aligned with the mounting slots on the vehicle body and pressed to secure the parts, eliminating the need for welding equipment and surface treatment processes. The installation time for a single component is reduced from 5 minutes in the traditional solution to 1 minute, and the impact of welding heat damage on the sheet metal strength is avoided. At the same time, the assembly process for two independent components is reduced, significantly improving production efficiency.

[0026] It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A novel structure that replaces sheet metal brackets and hollow sound insulation blocks, characterized in that: The device comprises a PA main layer, an SNS reinforcement layer, and an EVA sound insulation layer, which are combined to form an integrated component. The PA main layer is used to fit the inner wall of the body sheet metal cavity. The SNS reinforcement layer is embedded in the PA main layer to provide structural strength. The EVA sound insulation layer covers the outside of the PA main layer. The PA main layer is provided with a snap-fit ​​structure, which is used to snap and fix it to the preset mounting position of the body sheet metal cavity.

2. The novel structure for replacing sheet metal brackets and hollow sound insulation blocks according to claim 1, characterized in that: The SNS reinforcing layer and the PA main body layer are injection molded.

3. The novel structure for replacing sheet metal brackets and hollow sound insulation blocks according to claim 1, characterized in that: The snap-fit ​​structure includes elastic hooks, slots, or bosses set on the edge of the PA main body layer, and the snap-fit ​​structure is interference-fitted with the snap-fit ​​grooves or mounting holes on the inner wall of the body sheet metal cavity.

4. The novel structure for replacing sheet metal brackets and hollow sound insulation blocks according to claim 1, characterized in that: The shape of the new structure is adapted to the inner wall contour of the body sheet metal cavity, and the cross-section is U-shaped, L-shaped or planar.

Images