A large-size core-pulling hole structure and an adhesive reinforcement structure

Abstract

The utility model relates to the field of door sealing strip processing, specifically disclose a big specification's core -pulling hole structure and bonding reinforcing structure, including sealing strip body, the joint of sealing strip body is equipped with the core -pulling hole that is along the axial arrangement of sealing strip, the minimum width of core -pulling hole along the axial direction of sealing strip body is 2.5mm. The minimum width of core -pulling hole along the axial direction of sealing strip body of this scheme is bigger, and then the width of core rod formation core -pulling hole place is more wide compared with the structure width of core rod formation core -pulling hole place in background art, makes the local structure place of core rod higher, also not easy to wear or damage, big specification core -pulling hole lets the core rod remove have greater space, makes the core -pulling hole place of sealing strip body more not easy to tear damage, can improve the yield of sealing strip body.

Description

Technical Field

[0001] This utility model relates to the field of automotive door sealing strip processing technology, and in particular to a large-size core-pulling hole structure and an adhesive reinforcement structure. Background Technology

[0002] During the extrusion molding of car door sealing strips, a mandrel needs to be pre-embedded in the bubble structure of the sealing strip. The mandrel fills the cavity inside the bubble tube, providing a solid framework for the formation of the bubble structure. When removing the mandrel, a small hole needs to be precisely cut into the bubble tube wall. The shape of the hole is usually designed as a trapezoid or "I" shape, as shown in the instruction manual. Figure 1 and Figure 2 As shown, the minimum width of the core-pulling hole is only 0.5mm-0.7mm. When the core rod is pulled out, it is easy to cause tearing and damage at the core-pulling hole of the sealing strip. At the same time, the structural strength of the minimum width of the core rod forming the core-pulling hole is also relatively weak, which makes the local structure of the core rod easy to wear or damage, affecting the forming of the core-pulling hole of the sealing strip.

[0003] Meanwhile, after the corner treatment of the existing door seal strip's bubble structure, the core hole needs to be glued again. During the process of using glue to glue the core hole, due to the narrow width of the opening area, it is easy to make mistakes when applying glue, and the glue application efficiency is low. In actual operation, it is easy to cause local jamming at the core hole after glue application or the bubble structure to be narrowed and deformed. This leads to poor matching after installation and connection with the surrounding sheet metal, which can easily cause gaps between the edge of the door seal strip at the corner and the sheet metal parts. This can affect the accuracy and aesthetics of the door seal strip after installation, and even its function. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a large-size core-pulling hole structure and an adhesive reinforcement structure to solve the problems of small minimum width of the core-pulling hole and weak structural strength at the minimum width of the core rod forming the core-pulling hole, which leads to easy wear or damage in local structures of the core rod.

[0005] To achieve the above objectives, the basic solution of this utility model is as follows: a large-size core-pulling hole structure, including a sealing strip body, wherein a core-pulling hole is provided at the corner of the sealing strip body and arranged along the axial direction of the sealing strip, and the minimum width of the core-pulling hole along the axial direction of the sealing strip body is 2.5mm.

[0006] The technical principle of this utility model is as follows: the minimum width of the core-pulling hole along the axial direction of the sealing strip body is relatively large, and thus the width of the core rod forming the core-pulling hole is wider than the structural width of the core rod forming the core-pulling hole in the prior art, which makes the local structure of the core rod stronger and less prone to wear or damage.

[0007] When the core rod is removed from the sealing strip body through the core-pulling hole, the large-sized core-pulling hole provides more space for the core rod to be removed, making the core-pulling hole of the sealing strip body less prone to tearing and damage, thus improving the yield rate of the sealing strip body.

[0008] Furthermore, the maximum width of the core-pulling hole along the axial direction of the sealing strip body is equal to 12mm.

[0009] The above settings ensure that the maximum width of the core-pulling hole is large enough, making the local structure of the core rod strong enough; at the same time, they also ensure that the width of the core-pulling hole does not affect the forming of the sealing strip body.

[0010] Furthermore, the horizontal spacing between the longitudinal section profiles of the core-pulling holes decreases sequentially towards the center of the sealing strip body.

[0011] The above settings ensure that the width of the core-pulling hole near the center of the sealing strip body is relatively small, thus effectively guaranteeing the strength of the middle part of the bubble structure of the sealing strip body.

[0012] Furthermore, the longitudinal cross-sectional profile of the core-pulling hole is stepped.

[0013] The above settings make it easier to form the core-pulling hole in a localized area of ​​the mold.

[0014] This utility model also aims to provide an adhesive reinforcement structure, including a large-size core-pulling hole structure; and further includes: A contoured plug that can be embedded into the core-pulling hole has its circumferential sidewall facing the sidewall of the core-pulling hole of the sealing strip body, and the sidewall of the contoured plug is bonded to the sidewall of the core-pulling hole of the sealing strip body.

[0015] The technical principle of this utility model is that the conformal plug and the core-pulling hole are precisely matched, so that the conformal plug and the sealing strip body will not get stuck when they are bonded together.

[0016] Furthermore, the conformal plug fits against the side wall of the core-pulling hole of the sealing strip body, and several adhesive dots are provided on the circumference of the conformal plug, which are opposite to the side wall of the core-pulling hole.

[0017] With the above settings, during the dispensing process, the dispensing position is aligned with each dispensing hole, ensuring that each dispensing hole is filled with sufficient glue. At this time, some glue can flow along the outer wall of the conformal plug and the inner wall of the core-pulling hole, allowing the outer wall of the conformal plug and the inner wall of the core-pulling hole to be fully bonded. Meanwhile, with the dispensing hole position fixed, glue is less likely to flow to other parts of the sealing strip body, thus preventing the bubble structure of the sealing strip body from being narrowed and deformed.

[0018] Furthermore, a number of adhesive dots are evenly distributed around the periphery of the conformal plug; or, there is at least one adhesive dot on one side of the periphery of the conformal plug.

[0019] The above settings ensure that the adhesive can be more evenly distributed between the outer wall of the conformal plug and the inner wall of the core-pulling hole; and ensure that adhesive can be applied to all circumferential surfaces of the conformal plug, thereby improving the uniformity of adhesive application.

[0020] Furthermore, the end of the dispensing hole near the center of the sealing strip body abuts against the side wall of the core-pulling hole.

[0021] With the above settings, the glue is less likely to completely pass through the side wall of the core-pulling hole and enter the bubble tube of the sealing strip body, reducing the risk of the bubble structure being narrowed and deformed.

[0022] Furthermore, the side of the contoured plug furthest from the center of the sealing strip body smoothly transitions with the surface of the sealing strip body.

[0023] The above settings improve the aesthetics of the sealing strip and the conformal plug after installation.

[0024] Furthermore, the side of the conformal plug closest to the center of the sealing strip body protrudes from the inner wall of the sealing strip body.

[0025] With the above settings, the contoured plug can reinforce the core hole of the sealing strip body, making the structure of the sealing strip body more stable. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the core-pulling hole structure on an existing bubble-shaped sealing strip in the background art.

[0027] Figure 2 This is a schematic diagram of the core-pulling hole structure on an existing bubble-shaped sealing strip in the background art.

[0028] Figure 3 This is a schematic diagram of a large-size core-pulling hole structure in Embodiment 1 of this utility model.

[0029] Figure 4 This is a schematic diagram of an adhesive reinforcement structure in Embodiment 2 of this utility model.

[0030] In the above attached figures: sealing strip body 10, core-pulling hole 101, conformal plug 20, and glue dispensing hole 201. Detailed Implementation

[0031] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0032] Example 1 This embodiment is basically as follows: Figure 3As shown, this utility model embodiment proposes a large-size core-pulling hole structure, including a sealing strip body 10, and a core-pulling hole 101 arranged along the axial direction of the sealing strip at the corner of the sealing strip body 10.

[0033] like Figure 3 As shown, the core-pulling hole 101 is strip-shaped, and the width of the longitudinal section of the core-pulling hole 101 increases sequentially from left to right. The longitudinal section profile of the core-pulling hole 101 is stepped, and the horizontal spacing between the longitudinal section profiles of the core holes decreases sequentially towards the center of the sealing strip body 10. The minimum width of the core-pulling hole 101 at the bottom left end along the axial direction of the sealing strip body 10 is 3.5 mm, and the maximum width of the core-pulling hole 101 at the top right end along the axial direction of the sealing strip body 10 is 11.5 mm.

[0034] In this embodiment, the width of the core-pulling hole 101 formed by the core rod is wider than that of the core-pulling hole formed by the core rod in the prior art during the molding process, making the local structure of the core rod less prone to wear or damage. At the same time, when the core rod is removed from the sealing strip body 10 through the core-pulling hole 101, the large-size core-pulling hole 101 in this embodiment provides more space for the core rod to be removed, making the core-pulling hole 101 of the sealing strip body 10 less prone to tearing and damage, thereby improving the yield of the sealing strip body 10.

[0035] Example 2 The main differences between Example 2 and Example 1 are as follows: Figure 4 As shown, this invention aims to provide an adhesive reinforcement structure, including a large-size core-pulling hole structure as described in Embodiment 1. Specifically, it also includes a contoured plug 20 that can be embedded into the core-pulling hole 101. The circumferential sidewall of the contoured plug 20 fits against the sidewall of the core-pulling hole 101 of the sealing strip body 10, and the sidewall of the contoured plug 20 is bonded to the sidewall of the core-pulling hole 101 of the sealing strip body 10.

[0036] like Figure 4 As shown, the contoured plug 20 has several dispensing holes 201 on its circumferential surface that are opposite to the side wall of the core-pulling hole 101. The dispensing holes 201 are evenly distributed around the circumferential surface of the contoured plug 20, and there is at least one dispensing hole 201 on one side of the circumferential surface of the contoured plug 20. The end of the dispensing hole 201 near the center of the sealing strip body 10 abuts against the middle inner wall of the stepped structure of the core-pulling hole 101, so that the glue is not easy to enter the bubble tube of the sealing strip body 10 through the stepped structure, reducing the risk of the bubble structure being narrowed and deformed.

[0037] At the same time, such as Figure 4 As shown, the side of the contoured plug 20 away from the center of the sealing strip body 10 smoothly transitions with the surface of the sealing strip body 10; the side of the contoured plug 20 near the center of the sealing strip body 10 protrudes from the inner wall of the sealing strip body 10.

[0038] In this embodiment, during the bonding process, the conformal plug 20 is snapped into the core-pulling hole 101 of the sealing strip body 10. The conformal plug 20 is initially limited and tightened by the stepped core-pulling hole 101, preparing for subsequent dispensing.

[0039] During the dispensing process, the dispensing position is aligned with each dispensing hole 201, ensuring that each dispensing hole 201 is filled with sufficient glue. At this time, some of the glue can flow along the outer wall of the conformal plug 20 and the inner wall of the core-pulling hole 101, so that the outer wall of the conformal plug 20 and the inner wall of the core-pulling hole 101 can be fully bonded.

[0040] During the above bonding process, the precise fit between the contour plug 20 and the core-pulling hole 101 ensures that the contour plug 20 and the sealing strip body 10 will not jam during bonding. When applying adhesive, the position of the adhesive hole 201 is fixed, preventing the adhesive from flowing to other parts of the sealing strip body 10. This prevents the bubble structure of the sealing strip body 10 from being narrowed or deformed, ensuring a precise fit between the sealing strip body 10 and the door sheet metal parts after installation. This improves the accuracy and aesthetics of the installation of the sealing strip body 10 and ensures the complete sealing function of the sealing strip body 10.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A large-size core-pulling hole structure, comprising a sealing strip body, characterized in that, The sealing strip body has a core-pulling hole at the corner, which is arranged along the axial direction of the sealing strip. The minimum width of the core-pulling hole along the axial direction of the sealing strip body is 2.5mm.

2. The large-size core-pulling hole structure as described in claim 1, characterized in that, The maximum width of the core-pulling hole along the axial direction of the sealing strip body is equal to 12mm.

3. The large-size core-pulling hole structure as described in claim 1, characterized in that, The horizontal spacing between the longitudinal section profiles of the core-pulling holes decreases sequentially towards the center of the sealing strip body.

4. The large-size core-pulling hole structure as described in claim 3, characterized in that, The longitudinal cross-sectional profile of the core-pulling hole is stepped.

5. An adhesive reinforcement structure, characterized in that, Includes a large-size core-pulling hole structure as described in claim 3 or 4; further includes: A contoured plug that can be embedded into the core-pulling hole, wherein the circumferential sidewall of the contoured plug is opposite to the sidewall of the core-pulling hole of the sealing strip body, and the sidewall of the contoured plug is bonded to the sidewall of the core-pulling hole of the sealing strip body.

6. The adhesive reinforcement structure as described in claim 5, characterized in that, The conformal plug fits against the side wall of the core-pulling hole of the sealing strip body, and several adhesive dispensing holes are provided on the circumferential surface of the conformal plug, which are opposite to the side wall of the core-pulling hole.

7. The adhesive reinforcement structure as described in claim 6, characterized in that, A plurality of the aforementioned dispensing holes are evenly distributed around the periphery of the conformal plug; or, at least one dispensing hole is located on one side of the periphery of the conformal plug.

8. The adhesive reinforcement structure as described in claim 6, characterized in that, The end of the dispensing hole near the center of the sealing strip body abuts against the side wall of the core-pulling hole.

9. The adhesive reinforcement structure as described in claim 5, characterized in that, The side of the contoured plug away from the center of the sealing strip body smoothly transitions to the surface of the sealing strip body.

10. The adhesive reinforcement structure as described in claim 5, characterized in that, The contoured plug protrudes from the inner wall of the sealing strip body on the side closest to the center of the sealing strip body.

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