Efficient Bonding structure

Abstract

According to the efficient Bonding structure provided by the embodiment of the invention, the auxiliary adhesive tape is pasted beside the gluing track line of the inner framework or the outer cover plate in the extending direction of the gluing track line, and the stripping force of the auxiliary adhesive tape is used for replacing a part of pressure maintaining and curing effects in the tire mold pressing process, so that the mold closing time is shortened, and the production efficiency is improved. Therefore, the production cycle of products in the Bonding wire is effectively shortened, the production efficiency of the Bonding wire is improved, and the yield requirement is met while the equipment cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of automobile exterior decoration, in particular to a high-efficiency Bonding structure. Background Art

[0002] At present, most of the automotive exterior products on the market, such as spoilers and lidar covers, are assembled by bonding the outer cover and the inner frame through the bonding process. The bonding process can be divided into manual, semi-automatic and fully automatic based on its degree of automation. With the development of technology, the mainstream bonding process with fully automated tire mold tooling has gradually formed.

[0003] Taking a spoiler project of our company as an example (using acrylic two-component structural adhesive), when the product flows from the injection molding line and spraying line to the bonding line, the upper and lower contoured tire molds of the bonding tire mold tooling need to be pressed together for a long time to fully solidify the glue, so that the product can flow from the upper and lower molds of the tire mold tooling from the bonding line to the assembly line. This means that the production cycle of the bonding line is long. In the case of a limited number of bonding stations in the early stage, its maximum production capacity is insufficient. If there are special circumstances such as the need to prepare inventory in advance for the relocation of the production line, and the increase in the production of hot-selling models, there is a dilemma that the existing bonding stations cannot meet the production capacity. Utility Model Content

[0004] In view of this, an embodiment of the utility model provides a high-efficiency Bonding structure to shorten the production cycle of the Bonding line and improve production efficiency.

[0005] An embodiment of the utility model provides an efficient bonding structure, including an inner frame and an outer cover plate wrapped around the outer side of the inner frame, the inner frame and the outer cover plate are bonded and fixed by glue; a glue coating track line for coating glue is formed on the outer side surface of the inner frame or the inner side surface of the outer cover plate, and an auxiliary tape is pasted on the side of the glue coating track line along the extension direction of the glue coating track line, and the auxiliary tape is bonded and fixed to the inner frame and the outer cover plate.

[0006] Optionally, a trailing plane for pasting the auxiliary tape is formed beside the gluing track line along the extension direction of the gluing track line.

[0007] Optionally, a running gap is provided between the auxiliary adhesive tape and the gluing track line.

[0008] Optionally, the thickness of the auxiliary tape is consistent with the thickness of the glue.

[0009] Optionally, two convex ribs are provided on the outer side surface of the inner frame or the inner side surface of the outer cover plate, and the two convex ribs are parallel and spaced apart to define the glue coating track line located therebetween.

[0010] The embodiments of the utility model have the following beneficial effects: auxiliary tape is pasted on the side of the gluing track line of the inner frame or the outer cover plate along the extension direction of the gluing track line, and the peeling force of the auxiliary tape is used to replace a part of the pressure holding and curing effect in the tire mold pressing process, thereby reducing the mold closing time, thereby effectively shortening the production cycle of the product on the bonding line, and improving the production efficiency of the bonding line, so as to meet the output demand while reducing equipment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0012] Figure 1 A schematic diagram of the bonding structure provided by an embodiment of the utility model;

[0013] Figure 2 A partial cross-sectional view of the Bonding structure provided by the embodiment of the utility model during pressure maintenance;

[0014] Figure 3 for Figure 2 A partial enlarged schematic diagram of

[0015] The numbers in the figure represent:

[0016] 1. Inner frame; 2. Outer cover plate; 3. Glue; 4. Gluing track line; 5. Convex ribs; 6. Auxiliary tape; 7. Accompanying plane; 8. Upper contoured tire mold; 9. Lower contoured tire mold. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model.

[0018] See also Figure 1-Figure 3As shown, the embodiment of the utility model provides a high-efficiency Bonding structure, including an inner frame 1 and an outer cover plate 2 wrapped around the outer side of the inner frame 1, and the inner frame 1 and the outer cover plate 2 are bonded and fixed by glue 3. The outer side surface of the inner frame 1 or the inner side surface of the outer cover plate 2 (i.e., the opposite sides of the two) is formed with a glue coating track line 4 for coating the glue 3. Specifically, the embodiment of the utility model prefabricates two parallel and spaced convex ribs 5 on the outer side surface of the inner frame 1 or the inner side surface of the outer cover plate 2, and the two convex ribs 5 define the glue coating track line 4 between the two. Of course, the glue coating track line 4 can also be directly formed on the inner frame 1 or the outer cover plate 2 by grooves, and the embodiment of the utility model does not make too many restrictions.

[0019] Auxiliary tape 6 is pasted on the side of the gluing track line 4 along the extension direction of the gluing track line 4. The auxiliary tape 6 can be bonded and fixed to the inner frame 1 and the outer cover plate 2. The peeling force of the auxiliary tape 6 is used to replace a part of the pressure-holding and curing effect in the bonding mold pressing process, thereby reducing the mold closing time, thereby effectively shortening the production cycle of the product on the bonding line and improving the production efficiency of the bonding line. In order to ensure the good bonding performance of the auxiliary tape 6, a trailing plane 7 for pasting the auxiliary tape 6 can be designed on the side of the gluing track line 4 along the extension direction of the gluing track line 4. The thickness of the auxiliary tape 6 is consistent with the thickness of the glue 3. Considering the pasting space of the auxiliary tape 6, it is best to design a certain trailing gap (for example, about 2 mm) between the auxiliary tape 6 and the gluing track line 4.

[0020] Traditional Bonding mold tooling (refer to prior patents with publication numbers CN211662655U, CN114311707A, etc., not shown in the figure) generally includes an upper contour mold 8 for carrying a product outer cover plate 2, a lower contour mold 9 for carrying a product inner skeleton 1, a gluing robot for automatically applying glue 3, and a heating module arranged on the upper contour mold 8 and / or the lower contour mold 9. The heating module can cure the glue 3 between the outer cover plate 2 and the inner skeleton 1 by steam heating or the like, thereby bonding and fixing the outer cover plate 2 and the inner skeleton 1.

[0021] Specifically, taking a spoiler project of our company as an example (using acrylic two-component structural adhesive), the Bonding process under normal conditions is shown in steps 01-04 (the production cycle of a single Bonding station is about 8 minutes / piece, and the maximum output of a single Bonding station per hour is 8 pieces):

[0022] 00. Injection molding & spraying: After the inner frame 1 is injection molded, it flows to the Bonding line; after the outer cover 2 is injection molded, it flows to the spraying line, and then flows to the Bonding line after the spraying is completed.

[0023] 01. Upper mold: The upper contour mold 8 is flipped open, the outer cover plate 2 is placed into the upper contour mold 8, and the inner frame 1 is placed into the lower contour mold 9 accordingly. The outer cover plate 2 and the inner frame 1 are locked and fixed respectively through the limiting structure on the mold, and the time is about 1 minute.

[0024] 02. Gluing: The control system controls the gluing robot to automatically apply glue 3 along the gluing trajectory line 4, and the time is about 30 seconds.

[0025] 03. Maintaining pressure: The upper profiling mold 8 is turned over and pressed against the lower profiling mold 9, and then the glue 3 is heated and cured by the heating module to bond and fix the outer cover plate 2 and the inner frame 1 for about 6 minutes.

[0026] This process uses steam heating to quickly solidify the glue 3, while also removing the air remaining between the bonding surfaces, increasing the contact area between the bonding surfaces, and promoting the diffusion and penetration of adhesive molecules. The specific holding time depends on the heating temperature and the type of glue 3. Generally, the longer the holding time, the better the bonding performance of the glue 3, until it reaches a stable level.

[0027] 04. Lower mold: The upper contour mold 8 is flipped open, and the outer cover plate 2 and the inner frame 1 that have been bonded and fixed are taken out. The time is about 30 seconds.

[0028] 05. Assembly: The bonded and fixed products are transferred to the assembly line to start installing accessories such as clips, bolts, and foam.

[0029] According to experimental verification, after the product is molded in step 04, the bonding strength between the outer cover 2 and the inner frame 1 must reach at least 0.5Mpa before the assembly process in step 05 can begin. When installing accessories such as torque bolts and screws, the bonding strength between the outer cover 2 and the inner frame 1 must reach at least 2.0Mpa, otherwise the installation operation will cause failure problems such as cracking of the 3rd layer of glue and misalignment of the outer cover 2 and the inner frame 1.

[0030] In view of this, the embodiment of the utility model utilizes the peeling properties of the auxiliary tape 6 so that in the pressure holding process of step 03, the product only needs to be pressed and briefly heated to make the bonding strength between the outer cover plate 2 and the inner frame 1 reach above 2.0Mpa, meeting the lower mold removal requirements of step 04 and the assembly requirements of step 05, greatly shortening the pressure holding process time of step 03.

[0031] Taking the above spoiler project as an example (using acrylic two-component structural glue), the improved Bonding process flow of the embodiment of the utility model is as follows (the production cycle of a single Bonding station is about 4 minutes / piece, and the maximum output of a single Bonding station per hour is 15 pieces):

[0032] S1. Pretreatment: manually or mechanically attaching auxiliary tape 6 to the side of gluing track line 4 of inner frame 1 or outer cover plate 2 along the extending direction of gluing track line 4 for about 30 seconds.

[0033] S2, upper mold: the upper profiling mold 8 is flipped open, the outer cover plate 2 is placed in the upper profiling mold 8, and the inner frame 1 is correspondingly placed in the lower profiling mold 9, and the outer cover plate 2 and the inner frame 1 are respectively locked and fixed by the limiting structure on the mold, which takes about 1 minute.

[0034] S3, Gluing: The control system controls the gluing robot to automatically apply glue 3 along the gluing trajectory line 4, which takes about 30 seconds.

[0035] S4, pressure maintenance: the upper profiling mold 8 is reversed and pressed with the lower profiling mold 9, and then the glue 3 is heated and cured by the heating module to bond and fix the outer cover plate 2 and the inner frame 1, which takes about 2 minutes.

[0036] S5, lower mold: the upper profiling mold 8 is turned over and opened, and the outer cover plate 2 and the inner frame 1 that have been bonded and fixed are taken out, which takes about 30 seconds.

[0037] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present invention. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An efficient bonding structure, comprising an inner frame and an outer cover plate wrapped around the outer side of the inner frame, wherein the inner frame and the outer cover plate are fixed by glue, and characterized in that: A gluing track for coating glue is formed on the outer side surface of the inner frame or the inner side surface of the outer cover plate, and an auxiliary tape is pasted beside the gluing track along the extension direction of the gluing track, and the auxiliary tape is bonded and fixed to the inner frame and the outer cover plate.

2. The high-efficiency bonding structure according to claim 1, characterized in that: A trailing plane for pasting the auxiliary tape is formed beside the gluing track line along the extending direction of the gluing track line.

3. The high-efficiency bonding structure according to claim 1, characterized in that: A running gap is provided between the auxiliary adhesive tape and the gluing track line.

4. The high-efficiency bonding structure according to claim 1, characterized in that: The thickness of the auxiliary tape is consistent with the thickness of the glue.

5. The high-efficiency bonding structure according to claim 1, characterized in that: Two convex ribs are arranged on the outer side surface of the inner frame or the inner side surface of the outer cover plate, and the two convex ribs are arranged in parallel and at intervals to define the glue coating track line located therebetween.

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