Corner connecting plug core for automobile sealing strip

Abstract

The utility model relates to the technical field of automobile sealing strip corner connecting plug cores, in particular to an automobile sealing strip corner connecting plug core which comprises a plug core structure arranged in an automobile sealing strip corner connecting position, and the plug core structure comprises a main plug core and a filling plug core. The main injection hole and the auxiliary injection holes are used for injection of the main plug core and the filling plug cores, and the main injection hole and the auxiliary injection holes are formed in the corner connecting positions of the automobile sealing strip and provided with blanking caps. The device solves the problem that after a traditional foaming rubber plug core is injected, filling is not thorough, so that the force value of a butt joint angle is increased, and the abrasion resistance of the butt joint angle is not good.

Description

Technical Field

[0001] The present application relates to the technical field of automobile sealing strip corner plug cores, and specifically discloses an automobile sealing strip corner plug core. Background Art

[0002] The sealing strip is located at the door opening and closing position and will be squeezed when the door is opened or closed. Therefore, a deformation cavity is provided in the middle of the sealing strip, which can shrink and deform when squeezed, and recover when the squeezing force disappears.

[0003] About the sealing strip: The sealing strip is injection molded. As mentioned above, there is a deformation cavity inside the sealing strip. The deformation cavity is formed by the core-pulling hole.

[0004] The reason for setting up the deformation cavity is that this position is squeezed and will shrink and deform. Therefore, this position is the most critical position of the entire sealing strip.

[0005] As the instruction manual Figure 1 As shown, Figure 1 Demonstrating our company's existing technology for the internal corner of the sealing strip: EPDM foam plug core is injected into the internal corner of the automobile sealing strip through the core-pulling hole;

[0006] Advantages and disadvantages: The cost is controllable, but the foam plug core has poor conformability and will significantly increase the force on the joint angle. The force required for the joint to deform under stress increases, and the stress concentration points increase, which is detrimental to the wear resistance of the joint angle.

[0007] Therefore, we propose a better automotive sealing strip corner plug core. Utility Model Content

[0008] The utility model aims to solve the problem that the conventional foam plug core is not completely filled after injection, which leads to an increase in the force value of the butt joint angle and thus a disadvantageous wear resistance of the butt joint angle.

[0009] In order to achieve the above objectives, the present invention provides the following basic solutions:

[0010] A plug core for an automobile sealing strip corner joint includes a plug core structure arranged inside the automobile sealing strip corner joint position, the plug core structure including a main plug core and a filling plug core;

[0011] It also includes a main injection hole and several auxiliary injection holes for injecting the main plug core and the filling plug core. The main injection hole and the auxiliary injection holes are both arranged at the corner position of the automobile sealing strip, and the main injection hole and the auxiliary injection holes are both provided with plugging covers.

[0012] The principles and effects of this basic solution are:

[0013] 1. Compared with the prior art, the structure of this device is simple and ingeniously conceived. This device is designed with multiple core-pulling holes. After the automotive sealing strip is injection-molded, it can not only quickly complete the core-pulling of the automotive sealing strip, but also quickly complete the injection of the foaming rubber core plug through the core-pulling holes. And due to the design of multiple core-pulling holes, the injection of the foaming rubber core plug is faster, more rapid and more plump. To a certain extent, this design solves the problem that the filling is incomplete after the traditional foaming rubber core plug is injected, resulting in an increase in the force value of the docking angle and thus being unfavorable to the wear resistance of the docking angle.

[0014] 2. Compared with the prior art, another feature of this device is that the core plug structure includes a main core plug and a filling core plug. Since the internal space at the joint position of the automotive sealing strip is basically a special-shaped cavity, to completely fill the special-shaped cavity, not only a suitable core plug structure needs to be selected, but also the end corner positions of the special-shaped cavity need to be filled separately. Therefore, several auxiliary injection holes are designed to be used for separate filling, thus solving the problem that the filling is incomplete after the traditional foaming rubber core plug is injected, resulting in an increase in the force value of the docking angle and thus being unfavorable to the wear resistance of the docking angle.

[0015] Further, both the main core plug and the filling core plug are made of PU foaming profiling core plugs.

[0016] Further, the density of the main core plug is 0.02 g / cm3 - 0.03 g / cm3.

[0017] Further, the density of the filling core plug is 0.04 g / cm3 - 0.05 g / cm3.

[0018] Further, the auxiliary injection holes are evenly arranged along the extension line of the joint position of the automotive sealing strip.

[0019] Further, the auxiliary injection holes are end corner injection holes, which are arranged at other end corner positions of the non-main injection hole position inside the joint position of the automotive sealing strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 Shows a schematic structural diagram of the prior art of a core plug for the joint of an automotive sealing strip;

[0022] Figure 2 Shows a schematic internal structure diagram of a core plug for the joint of an automotive sealing strip. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation manner, structure, features and effects of the present utility model as follows.

[0024] The reference numerals in the accompanying drawings of the specification include: automotive sealant joint corner 1, main plug core 2, filling plug core 3, secondary injection hole 4, main injection hole 5.

[0025] The embodiment is as Figure 2 shown:

[0026] An automotive sealant joint corner plug core includes a plug core structure disposed inside the position of the automotive sealant joint corner 1, and the plug core structure includes a main plug core 2 and a filling plug core 3;

[0027] It further includes a main injection hole 5 and a plurality of secondary injection holes 4 for injecting the main plug core 2 and the filling plug core 3. The main injection hole 5 and the secondary injection holes 4 are both disposed at the position of the automotive sealant joint corner 1, and the main injection hole 5 and the secondary injection holes 4 are both provided with plug covers.

[0028] Returning to the accompanying drawings of the specification Figure 1 , the accompanying drawings of the specification Figure 1 is a traditional plug core structure. This plug core structure uses an EPDM foam plug core, which has certain foaming characteristics. However, as is well known, the cavities inside the position of the automotive sealant joint corner 1 are all irregular cavities. After filling, the EPDM foam plug core cannot achieve complete filling, which will result in poor conformity of the foam plug core, and will increase the force value of the joint corner greatly. When the joint corner is deformed by force, the required force value increases, and at the same time, the stress concentration points increase, which is not beneficial to the wear resistance of the joint corner.

[0029] Therefore, we have improved Figure 1 , and the new technology is as Figure 2 shown;

[0030] The key point is: the main injection hole 5 and a plurality of secondary injection holes 4. Returning to the main injection hole 5, the main injection hole 5 is first used for core pulling to form the irregular cavity inside the position of the automotive sealant joint corner 1, and then a plug cover is provided to ensure the subsequent sealing characteristics of the irregular cavity inside the position of the automotive sealant joint corner 1;

[0031] Secondly, the main injection hole 5 is not only used for core pulling, but also used to achieve most of the injection of the plug core structure. Most of the plug core structure is injected through the main injection hole 5. As mentioned above, since the inside of the position of the automotive sealant joint corner 1 is an irregular cavity, therefore, this kind of main injection hole 5 is not suitable. For this reason, a plurality of secondary injection holes 4 are designed, as Figure 2As shown, the auxiliary injection holes 4 are evenly distributed along the extension line of the position of the automobile sealing strip corner 1, because the end corner positions of the special-shaped cavity mostly appear along the extension line of the position of the automobile sealing strip corner 1;

[0032] Similarly: in order to prevent the main injection hole 5 and the auxiliary injection hole 4 from affecting each other, the auxiliary injection hole 4 is an end corner injection hole, which is set at the other end corner position inside the corner 1 of the automobile sealing strip, not the main injection hole 5. This is equivalent to the main injection hole 5 being only used to inject most of the plug core structure and fill most of the special-shaped cavity space, while the auxiliary injection hole 4 only appears at the end corner position and is only used to fully fill the special-shaped cavity space.

[0033] When the special-shaped cavity space is fully filled, Figure 2 As shown, the entire irregular cavity space will not appear Figure 1 The cavity performance shown in the figure shows that the advantages of this design are: the stress deformation of the joint angle is minimally affected, and basically has no effect on the stress deformation of the joint angle, while improving the sealing performance of the joint angle;

[0034] In terms of material:

[0035] In order to increase the conformability of the plug core structure, this case adopts: the main plug core 2 and the filling plug core 3 are both made of PU foamed contoured plug cores. Compared with EPDM foamed rubber plug cores, PU foamed contoured plug cores are more excellent in conformability and have better conformability effect.

[0036] The density of the main plug core 2 is greater than the density of the filling plug core 3:

[0037] Specifically: the density of the main plug core 2 is 0.02g / cm3-0.03g / cm3, and the density of the filling plug core 3 is 0.04g / cm3-0.05g / cm3;

[0038] The density of the filling plug core 3 is 0.04g / cm3--0.05g / cm3, which is greater than the density of the main plug core 2, which is 0.02g / cm3--0.03g / cm3. This is because the deformation and stress changes at the position of the special-shaped cavity corresponding to the filling plug core 3 are the most complex. The density at this position, that is, the density of the filling plug core 3, needs to be set higher to ensure the stability of the plug core structure.

[0039] The device solves the problem that the conventional foam plug core is not completely filled after injection, which leads to an increase in the force value of the butt joint angle and thus a disadvantageous wear resistance of the butt joint angle.

[0040] The above are only the preferred embodiments of the present utility model, and do not impose any formal restrictions on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to equivalent embodiments with equivalent changes within the scope of the technical solution of the present utility model by using the above-disclosed technical content. However, as long as it does not depart from the content of the technical solution of the present utility model, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. An automotive sealing strip corner plug core, characterized in that: It includes a plug core structure arranged inside the corner position of the automotive sealing strip. The plug core structure includes a main plug core and a filling plug core. It also includes a main injection hole and several auxiliary injection holes for injecting the main plug core and the filling plug core. The main injection hole and the auxiliary injection holes are both arranged at the corner position of the automotive sealing strip, and the main injection hole and the auxiliary injection holes are both provided with plug caps.

2. The corner plug core of an automotive sealing strip according to claim 1, wherein Both the main plug core and the filling plug core adopt PU foam profiling plug cores.

3. The corner plug core of an automotive sealing strip according to claim 2, characterized in that The density of the main plug core is 0.02 g / cm3 - 0.03 g / cm3.

4. The corner plug core of an automotive sealing strip according to claim 2, characterized in that, The density of the filling plug core is 0.04 g / cm3 - 0.05 g / cm3.

5. The corner plug core of an automotive sealing strip according to claim 1, characterized in that, The auxiliary injection holes are evenly distributed along the extension line of the corner position of the automotive sealing strip.

6. The core of the corner joint of an automotive sealing strip according to claim 5, characterized in that, The auxiliary injection holes are end corner injection holes, which are arranged at other end corner positions of the corner position of the automotive sealing strip inside and at non-main injection hole positions.

Images