Anti-falling rubber expansion block for automobile
By combining nylon frames, EVA foam, and sealant, the problem of sealing products falling off at high temperatures is solved, achieving staged sealing and improving sealing performance and in-vehicle environmental protection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU XINCHANGYI TECH CO LTD
- Filing Date
- 2025-09-28
- Publication Date
- 2026-07-21
AI Technical Summary
Existing sealing products are prone to detachment under conditions such as high-temperature baking, resulting in unsatisfactory sealing performance and failing to meet the high-quality sealing requirements of automobile manufacturing.
The design employs a combination of nylon frame, EVA foam, and sealant. The EVA foam foams first, and then the sealant melts, achieving a staged seal. Combined with limiting strips and guide bevels, it ensures that the sealant accurately fills the gaps.
It effectively prevents sealing materials from falling off, improves sealing reliability, keeps the vehicle interior clean, reduces noise, protects in-vehicle equipment, and enhances vehicle body strength and safety.
Smart Images
Figure CN224528580U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of expansion rubber block technology, and in particular to an anti-detachment automotive rubber expansion rubber block. Background Technology
[0002] In the automobile manufacturing process, sealing the gaps between sheet metal parts is crucial. Poor sealing allows external water, dust, and other impurities to easily enter the vehicle, affecting the interior environment and even damaging electronic equipment. Noise can also enter through these gaps, reducing driving comfort. Furthermore, these gaps are susceptible to corrosive substances, leading to rust and reducing the vehicle's strength and safety.
[0003] Currently, some sealing products on the market have problems such as sealing material falling off and unsatisfactory sealing effect under high-temperature baking and other working conditions, which cannot meet the high-quality sealing requirements of automobile manufacturing. Utility Model Content
[0004] The purpose of this invention is to address the shortcomings of existing sealing products, such as sealing material detachment and unsatisfactory sealing effect under high-temperature baking and other conditions, and to propose an anti-detachment automotive rubber expansion block.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] An anti-detachment automotive rubber expansion block includes a nylon frame, an EVA foam, and a sealant. The nylon frame includes a top plate, a partition, a bottom plate, and a side plate. The top plate is fixed to the top of the side plate. The partition and the bottom plate are evenly fixed to the side ends of the side plate. The sealant is placed on the top plate before heating. An accommodating gap is formed between the partition, the bottom plate, and the side plate. The EVA foam is disposed within the accommodating gap. After heating, the EVA foam and the sealant are used to fill the gap between the nylon frame and the sheet metal.
[0007] The nylon frame, partition and top plate are connected by a storage gap, which is used to store the sealant after it has been heated and melted.
[0008] In one possible design, the foaming temperature of the EVA foam is lower than the melting temperature of the sealant.
[0009] In one possible design, the EVA foam begins to foam when heated to 140°C.
[0010] In one possible design, the sealant begins to melt when heated to 160°C.
[0011] In one possible design, a limiting strip is fixed to the top of the top plate, and a guide gap is formed between the limiting strip and the top plate to limit the sealant.
[0012] In one possible design, the top of the top plate is provided with a guide ramp, which is used to guide the melted sealant toward the receiving gap.
[0013] In this application, the specific temperature settings of the EVA foam and the sealant 6 allow the EVA foam to foam first for initial sealing during the heating process, followed by the sealant melting for further sealing, achieving a good sealing effect in stages and improving the reliability of the seal.
[0014] The design of the limiting strip and guide slope on the top plate plays a limiting and guiding role for the sealant, ensuring that the sealant can accurately flow into the storage gap after melting, better fill the gap, and improve the sealing quality.
[0015] Beneficial effects: In this utility model, the anti-detachment automotive rubber expansion block, through the structural design of the nylon frame, provides a reasonable installation position for the EVA foam and sealant, ensuring the stable installation of each component and effectively preventing the sealing material from falling off under high temperature and other working conditions.
[0016] In this invention, the adhesive block can effectively prevent external water, dust and other impurities from entering the vehicle, keeping the interior clean and protecting the vehicle's electronic equipment; at the same time, it can reduce external noise entering the vehicle, improving driving and riding comfort; it can also prevent corrosive substances from eroding the sheet metal, enhancing the body strength and safety. Attached Figure Description
[0017] Figure 1 This is a cross-sectional view of an anti-detachment automotive rubber expansion block before expansion, as proposed in this utility model.
[0018] Figure 2 This is a cross-sectional schematic diagram of an anti-detachment automotive rubber expansion block after expansion, as proposed in this utility model.
[0019] In the diagram: 1. Nylon frame; 2. Top plate; 3. Partition; 4. Bottom plate; 5. EVA foam; 6. Sealant; 7. Limiting strip; 8. Guide slope; 9. Side plate. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0021] In one embodiment: Refer to Figures 1-2A type of anti-detachment automotive rubber expansion block, which is used in the field of expansion block technology, comprises a nylon frame 1, an EVA foam 5, and a sealant 6.
[0022] The structure of the nylon frame 1 is as follows: it includes a top plate 2, a partition 3, a bottom plate 4, and side plates 9. The top plate 2 is fixed to the top of the side plate 9, and the partition 3 and the bottom plate 4 are evenly fixed to the sides of the side plate 9. A storage gap is formed between the nylon frame 1, the partition 3, and the top plate 2. This storage gap is used to store the melted sealant 6. A limiting strip 7 is fixed to the top of the top plate 2, and a guide gap is formed between the limiting strip 7 and the top plate 2. This guide gap can limit the sealant 6. A guide slope 8 is also provided at the top of the top plate 2. The guide slope 8 is used to guide the melted sealant 6 toward the storage gap.
[0023] The sealant 6 is placed on the top plate 2 before heating. A receiving gap is formed between the partition 3, the bottom plate 4 and the side plate 9, and the EVA foam 5 is disposed in the receiving gap.
[0024] In another embodiment: Refer to Figures 1-2 An improvement upon Example 1 is made: the foaming temperature of the EVA foam 5 is lower than the melting temperature of the sealant 6. Specifically, the EVA foam 5 begins to foam when heated to 140°C, and the sealant 6 begins to melt when heated to 160°C. After heating, the EVA foam 5 and the sealant 6 are used to fill the gap between the nylon frame 1 and the sheet metal.
[0025] In practical applications, this anti-detachment automotive rubber expansion block is installed in the gaps of the car body. When the car enters the electrophoresis drying chamber, the oven temperature gradually increases. When the temperature reaches 140°C, the EVA foam 5 begins to foam and comes into contact with the sheet metal, providing an initial seal. As the temperature continues to rise to 160°C, the sealant 6 begins to melt and, guided by the guide ramp 8, flows into the storage gap, further filling the gap between the nylon frame 1 and the sheet metal, achieving a good sealing effect.
[0026] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.
[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A type of anti-detachment automotive rubber expansion block, used for sealing gaps in automobiles, characterized in that, include: Nylon frame (1), EVA foam (5) and sealant (6), the nylon frame (1) includes a top plate (2), a partition (3), a bottom plate (4) and a side plate (9), the top plate (2) is fixed to the top of the side plate (9), the partition (3) and the bottom plate (4) are evenly fixed to the side ends of the side plate (9), the sealant (6) is placed on the top plate (2) before heating, there is an accommodating gap between the partition (3), the bottom plate (4) and the side plate (9), the EVA foam (5) is placed in the accommodating gap, the EVA foam (5) and the sealant (6) are used to fill the gap between the nylon frame (1) and the sheet metal after heating; Among them, a storage gap is formed between the nylon frame (1), the partition (3) and the top plate (2), and the storage gap is used to store the sealant (6) after it has been heated and melted.
2. The anti-detachment automotive rubber expansion block according to claim 1, characterized in that, The foaming temperature of the EVA foam (5) is lower than the melting temperature of the sealant (6).
3. The anti-detachment automotive rubber expansion block according to claim 2, characterized in that, The EVA foam (5) begins to foam when heated to 140°.
4. The anti-detachment automotive rubber expansion block according to claim 3, characterized in that, The sealant (6) begins to melt when heated to 160°.
5. A type of anti-detachment automotive rubber expansion block according to any one of claims 1-4, characterized in that, A limiting strip (7) is fixed at the top of the top plate (2), and a guide gap is formed between the limiting strip (7) and the top plate (2) to limit the sealant (6).
6. The anti-detachment automotive rubber expansion block according to claim 5, characterized in that, The top plate (2) has a guide slope (8) at its top end, which is used to guide the melted sealant (6) toward the receiving gap.