Sealant tape for coating hard core material

Abstract

The utility model discloses a kind of encapsulated hard core material's sealant strip, including core body, the outer wall of the core body is fixedly connected with wrapping layer, the inner wall of the wrapping layer is equipped with recess, the outer wall of the core body is fixedly connected with reinforcing rib, the outer wall of the reinforcing rib is attached to the inner wall of recess, the top and bottom of the core body are respectively fixedly connected with protrusion, the outer wall of the protrusion is attached to the inner wall of wrapping layer, the front and back of the core body are respectively equipped with weight-reducing hole.The utility model relates to sealant strip technical field, the encapsulated hard core material's sealant strip, by the cooperation between recess, reinforcing rib and protrusion, realize from structure and block the delamination caused by vibration or temperature change, solve the weak bonding force of hard core material and wrapping layer, encapsulated hard core material's sealant strip is prone to delamination and shedding in long-term temperature change or vibration influence, to reduce the overall service life of sealant strip problem.

Description

Technical Field

[0001] This utility model relates to the field of sealing strip technology, specifically a sealing strip that covers a rigid core material. Background Technology

[0002] Sealing strips are rubber strips used for sealing products. They are mainly used in the automotive, machinery, and door and window industries. Sealing strips with a rigid core material are one type of sealing strip.

[0003] In traditional sealing strips with rigid core materials, the sealing strip's coating layer and the rigid core material are integrally formed through a co-extrusion process. However, due to the significant differences in molecular structure and poor chemical compatibility between the rigid core material and the coating layer, only weak intermolecular van der Waals forces can be formed during co-extrusion, lacking a chemical bonding basis. This results in weak bonding between the rigid core material and the coating layer, making the sealing strip with rigid core material prone to delamination and detachment under long-term temperature changes or vibration, thus reducing the overall service life of the sealing strip. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a sealing strip with a rigid core material, which solves the problem that the weak bonding between the rigid core material and the covering layer makes the sealing strip with the rigid core material prone to delamination and peeling off under long-term temperature changes or vibration, thus reducing the overall service life of the sealing strip.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sealing strip covering a rigid core material, comprising a core body, an outer wall of which is fixedly connected to a wrapping layer, an inner wall of which has a groove, an outer wall of which is fixedly connected to a reinforcing rib, the outer wall of which is attached to the inner wall of the groove, and a protrusion fixedly connected to the top and bottom of the core body, the outer wall of which is attached to the inner wall of the wrapping layer.

[0006] Preferably, the core has weight-reducing holes on its front and back sides.

[0007] Preferably, the front and back sides of the wrapping layer are fixedly connected with horizontal strips, and the surface of the horizontal strips is provided with horizontal grooves.

[0008] Preferably, the top and bottom of the wrapping layer are respectively provided with guide grooves.

[0009] Preferably, the top of the wrapping layer and the side of the top near the guide groove are provided with micro-protrusion textures.

[0010] Preferably, the number of micro-protrusions is several. Beneficial effects

[0011] This invention provides a sealing strip for covering a rigid core material. It offers the following advantages: The sealing strip, through the interplay of grooves, reinforcing ribs, and protrusions, structurally prevents delamination caused by vibration or temperature changes. This solves the problem of weak bonding between the rigid core material and the covering layer, which leads to delamination and detachment of the sealing strip under long-term temperature variations or vibration, thus reducing the overall service life of the sealing strip. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 for Figure 1 Enlarged view of section B in the middle.

[0013] In the diagram: 1. Core; 2. Encasing layer; 3. Groove; 4. Reinforcing rib; 5. Protrusion; 6. Weight reduction hole; 7. Horizontal bar; 8. Horizontal groove; 9. Guide groove; 10. Micro-convex texture. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] The weak bonding between the rigid core material and the covering layer makes the sealing strip with the rigid core material prone to delamination and detachment under long-term temperature changes or vibration, thus reducing the overall service life of the sealing strip.

[0016] In view of this, the present invention provides a sealing strip for covering a rigid core material. Through the cooperation between the groove, the reinforcing rib and the protrusion, the delamination caused by vibration or temperature change is blocked from the structure. This solves the problem that the rigid core material and the covering layer have weak bonding force, which makes the sealing strip covered with the rigid core material prone to delamination and peeling off under long-term temperature change or vibration, thereby reducing the overall service life of the sealing strip.

[0017] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the following working principle. The detailed connection methods are well-known technologies in the field. The following mainly introduces the working principle and process.

[0018] Example 1, by Figure 1-3It is understood that the sealing strip with a rigid core material in this case includes a core 1, a wrapping layer 2 fixedly connected to the outer wall of the core 1, a groove 3 opened on the inner wall of the wrapping layer 2, a reinforcing rib 4 fixedly connected to the outer wall of the core 1, the outer wall of the reinforcing rib 4 adhering to the inner wall of the groove 3, and protrusions 5 fixedly connected to the top and bottom of the core 1 respectively, the outer wall of the protrusions 5 adhering to the inner wall of the wrapping layer 2. In the specific implementation process, it is worth noting that the core 1 is made of modified rigid PVC plastic (or ABS engineering plastic), which has high strength, excellent resistance to bending deformation, and a plastic deformation rate of <5% after long-term loading. It can maintain structural stability in an environment of -30℃ to 70℃. The encapsulation layer 2 is made of high viscoelastic EPDM composite material (or weather-resistant silicone), which has excellent elastic recovery (compression set rate <15%) and aging resistance (performance retention rate >80% after 5000 hours of UV irradiation). Furthermore, it is co-extruded with the core 1. Currently, molecular-level hot melt bonding is used. Grooves 3 are opened on the inner wall of the wrapping layer 2, and their shape is perfectly matched with the reinforcing ribs 4. The number of reinforcing ribs 4 needs to be designed according to the width of the core (4 ribs when the width is 8~10mm, and 5~6 ribs when the width is 10~15mm) to ensure uniform circumferential force. Protrusions 5 are symmetrically distributed on the top and bottom of the core 1, in the form of hemispherical or rectangular protrusions with a height of 0.5~0.8mm, and are tightly attached to the inner wall of the wrapping layer 2. The material of the reinforcing ribs 4 and protrusions 5 is the same as that of the core 1. The connection between the reinforcing ribs 4, protrusions 5 and the core 1 is integral injection molding. The reinforcing rib 4 is embedded in the groove 3 to form an interference fit (interference amount 0.1-0.2mm), upgrading the traditional planar bonding contact method to a three-dimensional interlocking, which increases the peel strength between the core 1 and the wrapping layer 2 to more than 15N / 25mm (traditional structure ≤8N / 25mm). The protrusion 5 fills the micro gap between the core 1 and the wrapping layer 2, further increasing the interface contact area, which increases the shear strength between the core 1 and the wrapping layer 2 by 30%, avoiding point-like detachment caused by local stress concentration, and structurally blocking delamination caused by vibration or temperature changes. At the same time, the reinforcing rib 4 improves the bending resistance of the core 1, effectively resisting bending deformation under conditions such as long-term opening and closing of doors and windows and bumpy driving, ensuring that the sealing strip maintains its sealing shape for a long time. Furthermore, weight reduction holes 6 are respectively provided on the front and back of the core 1; In the specific implementation process, it is worth noting that the diameter of the weight reduction hole 6 is 2~3mm, the hole spacing is 5~8mm, and it is evenly distributed in a ring. The wall thickness of the weight reduction hole 6 must be ≥1mm to prevent the core from breaking due to the thin hole wall. The function of the weight reduction hole 6 is to reduce the overall weight of the rubber strip by 15%~20%, which facilitates installation and transportation. Furthermore, horizontal strips 7 are fixedly connected to the front and back of the wrapping layer 2, and horizontal grooves 8 are formed on the surface of the horizontal strips 7; In the specific implementation process, it is worth noting that the horizontal strip 7 and the wrapping layer 2 are integrally co-extruded and made of the same material. The height of the horizontal strip 7 must match the depth of the installation groove (usually 0.2~0.3mm less than the depth of the installation groove) to ensure that there is no interference compression after installation. When installing the sealing strip as a whole, the workers will embed the horizontal strip 7 into the external installation groove (such as the door and window frame groove). The horizontal groove 8 increases the contact friction with the installation groove, which increases the sliding resistance of the strip and completely avoids displacement caused by vibration or thermal expansion and contraction. At the same time, the horizontal strip 7 and the horizontal groove 8 form multiple sealing barriers to help improve the overall sealing reliability. Furthermore, the top and bottom of the wrapping layer 2 are respectively provided with flow guide grooves 9; In the specific implementation process, it is worth noting that the guide groove 9 is integrally formed with the wrapping layer 2. The groove width is 1~2mm and the groove depth is 0.5~1mm. It extends in a continuous V shape along the length of the top and bottom of the wrapping layer. The guide groove 9 guides rainwater or condensate to be discharged quickly along the groove, avoiding water seepage into the sealing gap and preventing the core from rusting and the wrapping layer from aging. Among them, the drainage channel 9 needs to be aligned with the external drainage structure (such as the drainage holes of doors and windows) to ensure that the drainage path is unobstructed.

[0019] Example 2, by Figure 1 and 3 It can be seen that the top of the wrapping layer 2 and the side of the top near the guide groove 9 are provided with micro-protrusion texture 10; In the specific implementation process, it is worth noting that the micro-embossed texture 10 is integrally formed with the wrapping layer 2, and has continuous sawtooth-shaped protrusions (height 0.2~0.4mm, spacing 1~2mm). The micro-embossed texture 10 increases the contact pressure with the sealing surface (such as door and window glass, car door panel), making the sealing pressure distribution more uniform, while increasing the surface friction and preventing the rubber strip from shifting under vibration or external force. Furthermore, the number of micro-embossed textures 10 is several; In the specific implementation process, it is worth noting that the height of the micro-convex texture 10 should be slightly less than the elastic compression of the wrapping layer 2 (usually 1 / 3 of the compression) to ensure that there is still a margin after compression and to maintain a long-term sealing effect.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing strip covering a rigid core material, comprising a core (1), characterized in that: The outer wall of the core (1) is fixedly connected to a wrapping layer (2), and the inner wall of the wrapping layer (2) is provided with a groove (3). The outer wall of the core (1) is fixedly connected to a reinforcing rib (4), and the outer wall of the reinforcing rib (4) is attached to the inner wall of the groove (3). The top and bottom of the core (1) are respectively fixedly connected to protrusions (5), and the outer wall of the protrusions (5) is attached to the inner wall of the wrapping layer (2).

2. The sealing strip for covering a rigid core material according to claim 1, characterized in that: The core (1) has weight-reducing holes (6) on its front and back sides respectively.

3. The sealing strip for covering a rigid core material according to claim 1, characterized in that: The front and back sides of the wrapping layer (2) are respectively fixedly connected with horizontal strips (7), and the surface of the horizontal strips (7) is provided with horizontal grooves (8).

4. The sealing strip for covering a rigid core material according to claim 1, characterized in that: The top and bottom of the wrapping layer (2) are respectively provided with guide grooves (9).

5. A sealing strip for covering a rigid core material according to claim 4, characterized in that: The top of the wrapping layer (2) and the side of the top near the guide groove (9) are provided with micro-protrusion texture (10).

6. A sealing strip for covering a rigid core material according to claim 5, characterized in that: The number of the micro-protrusions (10) is several.

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