Cavity sound insulation block structure

Abstract

The utility model belongs to the technical field of injection molding products, and particularly relates to a cavity sound insulation block structure which comprises a PA framework and EVA polystyrene foam compounded on the surface of the PA framework, the PA framework is connected at a bending position through a PA bending buckle, the bending position of the PA bending buckle is preformed to form an included angle of 135 degrees, the wall thickness of the bending position is thinned, and the thickness of the PA bending buckle is reduced. And the connecting structure can adaptively block a bending section cavity between 90 degrees and 180 degrees of a vehicle body. According to the utility model, through the composite structure of the PA framework and the EVA polystyrene foam layer which are integrally extruded and molded, and in combination with the pre-molded 135-degree bending angle and the wall thickness reduction design, the sound insulation block can be self-adaptive to 90-180-degree bending requirements, and the application range of cavity section plugging is obviously widened.

Description

Technical Field

[0001] This utility model belongs to the field of injection molding product technology, specifically relating to a cavity sound insulation block structure. Background Technology

[0002] In the field of automotive sound insulation, cavity sound insulation blocks are crucial components used to seal cavities in the vehicle body and block noise transmission. Currently, there are two main types of technical solutions and corresponding problems in this field:

[0003] On the one hand, although traditional injection-molded cavity sound insulation blocks can be used to seal bent sections, their production process is complex and they rely on injection molds for molding, resulting in long production cycles and high mold costs, making it difficult to meet the low-cost requirements of large-scale production.

[0004] On the other hand, existing PA (polyamide) and EVA (ethylene-vinyl acetate copolymer) composite extruded cavity sound insulation blocks, although achieving efficient sound insulation and sealing of a single planar cross section through composite extrusion process, and having the advantages of relatively simple process and low cost, have significant application limitations when facing the bending cross section commonly found in vehicle body structure. This is because such products lack a connection structure adapted to the bending position and cannot be directly used for cavity sealing of bending parts. Utility Model Content

[0005] The purpose of this invention is to provide a cavity sound insulation block structure to solve the problems existing in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cavity sound insulation block structure, comprising a PA skeleton and EVA foam composite on the surface of the PA skeleton, wherein the PA skeleton is connected at the bending position by PA bending buckles, the bending position of the PA bending buckles is pre-formed at a 135° angle, and the wall thickness at the bending position is reduced, which can adaptively seal the cavity of the bending section between 90° and 180° of the vehicle body.

[0007] Preferably, the wall thickness reduction at the bending position of the PA bending buckle is 1 / 3 to 1 / 2 of the wall thickness of the PA bending buckle.

[0008] Preferably, the PA frame is further provided with PA clips for vehicle body mounting.

[0009] Preferably, the PA bending buckle includes a connecting plate and irregularly shaped elastic buckles, the middle of the connecting plate is the bending position, and the two irregularly shaped elastic buckles are arranged on both sides of the bending position.

[0010] The beneficial effects of this utility model are as follows: This utility model uses an integrally extruded PA skeleton and EVA foam layer composite structure, combined with a pre-formed 135° bending angle and wall thickness reduction design, to enable the sound insulation block to adapt to bending requirements of 90°~180°, significantly improving the applicability of cavity section sealing; at the same time, the irregular bending buckles extending from both ends of the PA skeleton adopt an asymmetrical elastic barbed hook structure, which not only achieves vertical snap-fit ​​with the body sheet metal to prevent misinstallation, but also ensures the stability of locking force in the bending state through wall thickness gradient optimization, ultimately achieving the goal of process simplification. Attached Figure Description

[0011] Figure 1 This is a structural diagram of the present invention;

[0012] Figure 2 This is a partially enlarged view of the present invention;

[0013] Figure 3 This is a perspective view of the PA bending buckle in this utility model. Detailed Implementation

[0014] 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.

[0015] 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.

[0016] 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.

[0017] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings and preferred embodiments.

[0018] like Figure 1 and Figure 2 As shown, a cavity sound insulation block structure includes a PA skeleton 1 and EVA foam 2 laminated to the surface of the PA skeleton. The PA skeleton is connected at the bending position by PA bending clips 3. The bending position of the PA bending clips is pre-formed at a 135° angle, and the wall thickness at the bending position is reduced, so that the connection structure can adaptively seal the cavity of the bending section between 90° and 180° of the vehicle body. Specifically, the PA skeleton 1 is extruded from polyamide material and is in the shape of a strip, including a straight section and a bending section. The bending section is provided with PA bending clips, and the bending position is pre-formed at a specific angle by a mold. The wall thickness at the bending position is appropriately reduced compared to the straight section, forming an elastic deformation area. The wall thickness reduction at the bending position of the PA bending clip is 1 / 3 to 1 / 2 of the wall thickness of the PA bending clip.

[0019] The PA frame is also provided with PA clips 4 for body mounting. These clips are located on both sides of the straight section, integrally formed with the PA bending clips, and have a hook-shaped or irregular cross-section for mounting and fixing to the body mounting holes.

[0020] Furthermore, such as Figure 3 As shown, the PA bending clip 3 includes a connecting plate 31 and an irregularly shaped elastic buckle 32. The middle of the connecting plate is the bending position, and the two irregularly shaped elastic buckles are arranged on both sides of the bending position. The asymmetrical shape of the irregularly shaped elastic buckle can only match the corresponding structure of the vehicle body. If installed in reverse, it cannot be inserted due to shape incompatibility, thus avoiding incorrect installation direction.

[0021] 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 cavity baffle block structure, characterized by: It includes a PA skeleton and EVA foam composite on the surface of the PA skeleton. The PA skeleton is connected at the bending position by PA bending buckle. The bending position of the PA bending buckle is pre-formed at a 135° angle, and the wall thickness at the bending position is reduced, which can adaptively seal the bending section cavity between 90° and 180° of the vehicle body.

2. The cavity sound insulation block structure according to claim 1, characterized in that: The wall thickness reduction at the bending position of the PA bending buckle is 1 / 3 to 1 / 2 of the wall thickness of the PA bending buckle.

3. The cavity sound insulation block structure according to claim 1, characterized in that: The PA frame is also equipped with PA clips for attaching to the vehicle body.

4. The cavity sound insulation block structure according to claim 1, characterized in that: The PA bending buckle includes a connecting plate and irregularly shaped elastic buckles. The middle of the connecting plate is the bending position, and the two irregularly shaped elastic buckles are arranged on both sides of the bending position.

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