Horizontally assembled expanded rubber block
Patent Information
- Application Number
- CN202522546835.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-01
- Publication Date
- 2026-10-13
- Estimated Expiration
- 2035-12-01
AI Technical Summary
[0003]本实用新型的目的在于提供一种水平组装式膨胀胶块，解决了传统胶块无法实现防水功能，以及现有防水胶块存在的模具费用高、无法组装等问题
[0008]本实用新型的有益效果在于：胶块结构由发泡材配合热熔胶上下组装而成，水平安装，发泡后对车身钣金间隙填充，实现完全密封填充，使车身空腔的密封性大幅提升，提升整车水密性能。且具有开发费用较低，模具成本低的优点。对车身钣金间隙完全填充，实现某一截面完全密封，阻断车身空腔的气体、水，达到主机厂对于车辆水密性能的要求。
Smart Images
Figure CN224850202U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vehicle cavity sealing technology, and in particular to a horizontally assembled expansion block for water sealing of vehicle cavities, especially suitable for areas that are completely perpendicular to sheet metal. Background Technology
[0002] Currently, the waterproofing requirements for new energy vehicles are gradually increasing. With rising user experience demands, the requirements for airtightness are also higher, and some new models are beginning to require waterproofing. Currently, waterproofing products on the market are relatively expensive. OEMs want to improve the overall waterproofing of the vehicle's underbody by using sound-insulating rubber blocks within the sheet metal. Traditional rubber block structures cannot achieve waterproofing. Although some suppliers provide waterproof rubber blocks, they still suffer from drawbacks such as high mold costs and difficulty in assembly. Therefore, there is an urgent need to design a horizontally assembled expansion rubber block that can be used for sealing vehicle cavities in wading situations. Summary of the Invention
[0003] The purpose of this invention is to provide a horizontally assembled expandable adhesive block that solves the problems of traditional adhesive blocks failing to achieve waterproofing, as well as the high cost of molds and assembly difficulties of existing waterproof adhesive blocks. This invention consists of two layers of PA66, foam material, and hot melt adhesive. It is horizontally installed within a sheet metal cavity. After electrophoresis at the OEM factory, the hot melt adhesive melts and flows downwards in a viscous sheet. The foam material below expands, and the foam material inside the sheet metal expands and compresses, first filling large gaps. Then, due to gravity, the hot melt adhesive melts and flows downwards to fill all gaps (including sharp corners and other areas not filled by the foam material).
[0004] The above-mentioned objective of this utility model is achieved through the following technical solution: A horizontally assembled expanding adhesive block includes hot melt adhesive 1, upper nylon 2, foam material 3, lower nylon 4, mounting clips 5, a snap-fit structure for the upper and lower nylons 6, a self-sealing hole in the foam layer 7, a leakage hole in the upper hot melt adhesive 8, and a gap 9 designed between the adhesive block and the edge of the sheet metal. The hot melt adhesive 1 and the upper nylon 2 are assembled into an upper sealing body 10 through two-color injection molding or injection molding followed by assembly. The foam material 3 and the lower nylon 4 are assembled into a lower sealing body 11 through two-color injection molding or injection molding followed by assembly. The upper sealing body 10 is assembled with the lower sealing body 11 through the snap-fit structure 6 to form a whole, and is installed to the sheet metal opening through the mounting clips 5. It is suitable for areas completely perpendicular to the sheet metal and cannot have any angle.
[0005] A leakage hole 8 for the upper hot melt adhesive is provided in the upper sealing body 10.
[0006] There is a gap of 9 between the expansion rubber block and the edge of the sheet metal.
[0007] The foam material 3 is provided with a self-sealing hole 7 in the foam layer. The electrophoretic liquid can flow through the self-sealing hole 7 in the foam layer through the expansion block without leaving electrophoretic liquid on the expansion block. When the temperature in the painting workshop is above 150 degrees, the foam material 3 foams and fills and completely seals the hole.
[0008] The beneficial effects of this utility model are as follows: the rubber block structure is assembled from foamed material and hot melt adhesive, installed horizontally, and after foaming, it fills the gaps in the body sheet metal, achieving complete sealing and significantly improving the sealing performance of the body cavity, thus enhancing the overall watertightness of the vehicle. It also has the advantages of lower development costs and lower mold costs. By completely filling the gaps in the body sheet metal and achieving complete sealing of a certain cross-section, it blocks gas and water from entering the body cavity, meeting the watertightness requirements of OEMs for vehicles. Attached Figure Description
[0009] The accompanying drawings, which are provided to further illustrate the present invention and form part of this application, illustrate the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.
[0010] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the upper and lower sealing bodies of this utility model; Figure 3 This is a schematic diagram of the main structure of this utility model; Figure 4 The upper and lower nylon snap-fit structure of this utility model ( Figure 3 A cross-sectional structural diagram of the middle G section; Figure 5 The upper and lower nylon snap-fit structure of this utility model ( Figure 3 A cross-sectional view of the middle H section; Figure 6 This is an axonometric schematic diagram of an embodiment of the present invention installed on a vehicle-mounted sheet metal. Figure 7 This is a front view schematic diagram of an embodiment of the present invention installed on a vehicle-mounted sheet metal.
[0011] In the diagram: 1. Hot melt adhesive; 2. Upper nylon; 3. Foam material; 4. Lower nylon; 5. Mounting clip; 6. Snap-fit structure; 7. Self-sealing hole in the foam layer; 8. Leakage hole; 9. Gap; 10. Upper sealing body; 11. Lower sealing body. Detailed Implementation
[0012] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. To make the above-mentioned objects, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0013] See Figures 1 to 7 As shown, the horizontally assembled expandable adhesive block of this utility model includes hot melt adhesive 1, upper nylon 2, foam material 3, lower nylon 4, mounting clip 5, snap-fit structure 6 for the upper and lower nylons, self-sealing hole 7 for the foam layer, leakage hole 8 for the upper hot melt adhesive, and a gap 9 designed between the adhesive block and the edge of the sheet metal. The hot melt adhesive 1 and the upper nylon 2 are assembled into an upper sealing body 10 by two-color injection molding or injection molding, and the foam material 3 and the lower nylon 4 are assembled into a lower sealing body 11 by two-color injection molding or injection molding. The upper sealing body 10 is assembled with the lower sealing body 11 into a whole by snap-fit structure 6, and is installed to the sheet metal opening by mounting clip 5. It is suitable for areas completely perpendicular to the sheet metal and cannot have any angle.
[0014] A leakage hole 8 for the upper hot melt adhesive is provided in the upper sealing body 10.
[0015] There is a gap of 9 between the expansion rubber block and the edge of the sheet metal.
[0016] The foamed material 3 is provided with a self-sealing hole 7 for the foam layer. Below the hole is a snap-fit structure 6 of upper and lower nylon. Before foaming, the electrophoretic liquid leaks, and after foaming, the foamed material expands to completely seal the hole.
[0017] See Figures 1 to 7 As shown, the steps for using the horizontally assembled expansion block of this utility model are as follows: 1. The hot melt adhesive 1 and the upper nylon 2 are assembled into one piece by two-color injection molding or injection molding to form the upper sealing body 10; 2. The foam material 3 and the lower nylon 4 are assembled into one piece by two-color injection molding or injection molding to form the lower sealing body 11; 3. The upper sealing body 10 is assembled and snapped together with the lower sealing body 11 through the upper and lower nylon snap-fit structure 6 to form a whole; 4. After the parts are assembled, the entire assembly is installed onto the sheet metal opening using mounting clips 5. This is suitable for areas that are completely perpendicular to the sheet metal and must not be at any angle.
[0018] 5. During high-temperature baking in the painting workshop, when the workshop temperature reaches a certain value, the hot melt adhesive 1 melts and flows downwards through the leakage holes 8 and gaps 9. Simultaneously, the foam material 3 expands due to heat, and supported by the nylon 4 below, it foams upwards and fills the gaps 9 and the self-sealing holes 7 of the foam layer. Due to gravity, the melted hot melt adhesive 1 flows downwards, filling all gaps (such as sharp corners not filled by the foam material), achieving a complete seal on the adhesive block mounting surface, blocking the flow of gas, noise, and water, improving the overall vehicle's NHV (Noise, Vibration, and Air Quality) and achieving a waterproof effect.
[0019] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made to this utility model should be included within the protection scope of this utility model.
Claims
1. A horizontally assembled expanding rubber block, characterized in that: The structure includes hot melt adhesive (1), upper nylon (2), foam material (3), lower nylon (4), mounting buckle (5), snap-fit structure (6), self-sealing hole of foam layer (7), leakage hole (8), and gap (9). The hot melt adhesive (1) and upper nylon (2) are assembled into an upper sealing body (10) by two-color injection molding or injection molding. The foam material (3) and lower nylon (4) are assembled into a lower sealing body (11) by two-color injection molding or injection molding. The upper sealing body (10) is assembled into a whole with the lower sealing body (11) by snap-fit structure (6) and is horizontally installed at the opening of sheet metal by mounting buckle (5).
2. The horizontally assembled expanding rubber block according to claim 1, characterized in that: The upper sealing body (10) is provided with a leakage hole (8) for the upper hot melt adhesive.
3. The horizontally assembled expanding rubber block according to claim 1, characterized in that: There is a gap between the expansion rubber block and the edge of the sheet metal (9).
4. The horizontally assembled expanding rubber block according to claim 1, characterized in that: The foamed material (3) is provided with self-sealing pores (7) in the foam layer.