Die for friction welding of 3D screen cloth wrapping piece and air bag frame

Abstract

The utility model discloses a die for friction welding of a 3D mesh covering piece and an air bag frame, which comprises a lower die and an upper die arranged above the lower die, the bottom surface of the upper die is fixedly provided with an upper insert for loading the air bag frame, and the top of the lower die is fixedly provided with a lower die block for loading the covering piece. A mounting groove located under the upper insert is formed in the top face of the lower module, a lower insert is fixedly mounted in the mounting groove, and the outer surface of the lower insert is coated with a rubber layer capable of increasing the friction force between the coating piece and the lower insert. The lower die block is designed in a blocking mode, the lower insert coated with the glue layer is additionally arranged in the lower die block, the glue layer can increase friction between the lower die block and the 3D mesh coating piece, the coating piece is prevented from moving in the welding process, and therefore the appearance of the 3D mesh coating piece welded to the air bag frame is improved, it is ensured that the appearance is neat and smooth, and the service life of the air bag frame is prolonged. And the welding pulling-out force is ensured to meet the standard requirement, so that the qualification rate of the product welding process is improved, the product manufacturing cost is reduced, and the product quality is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, and in particular to a mold used for friction welding of a 3D mesh cloth covering and an airbag frame. Background Art

[0002] 3D-mesh wrapping design is a new design method with a relatively simple process. It can not only improve the design freedom, but also greatly reduce the development cost. 3D-mesh is called 3D mesh cloth, commonly known as extra thick sandwich mesh cloth, also known as 3D material or 3D spacer fabric. It is a new pure fabric material with good breathability, elasticity and support.

[0003] The perceived quality of the instrument panel's 3D-mesh coating process is superior to that of the thermoforming process, which solves the technical bottleneck that traditional manual coating cannot meet the design requirements of the passenger airbag detonation experiment. It can achieve a weakening-free design of the surface and 3D mesh, meeting the personalized and diversified needs of products.

[0004] When it comes to the design of the airbag frame, the airbag frame is divided into a friction welding airbag frame and a clip-on airbag frame according to the fastening form. When the friction welding airbag frame and the 3D-mesh covering are fixed by friction welding, due to the overall thin structure and low rigidity of the 3D-mesh covering, the 3D-mesh covering is prone to movement when welding on the existing friction welding mold, resulting in defects such as scratches on the product appearance. The overall appearance of the product will be uneven, and the welding pull-off force cannot meet the standard requirements, resulting in a high product scrap rate, increased product manufacturing costs, and poor welding effects. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a mold for friction welding of a 3D mesh covering and an airbag frame, which improves the appearance of the 3D-mesh covering and the airbag frame after welding by increasing friction, thereby solving the problem of poor welding effect in the past.

[0006] In order to solve the above technical problems, the utility model discloses a mold for friction welding of a 3D mesh covering and an airbag frame, comprising a lower mold and an upper mold arranged above the lower mold, the bottom surface of the upper mold is fixedly installed with an upper insert for loading the airbag frame, the top of the lower mold is fixedly installed with a lower module for loading the covering, the top surface of the lower module is provided with an installation groove located directly below the upper insert, the lower insert is fixedly installed in the installation groove, and the outer surface of the lower insert is covered with a rubber layer that can increase the contact friction between the covering and the lower insert.

[0007] Among them, the lower insert is made of aluminum alloy structure.

[0008] Wherein, the adhesive layer is a rubber layer.

[0009] The thickness of the rubber layer is 0.9 mm to 1.1 mm.

[0010] Among them, the thickness of the rubber layer is 1mm.

[0011] Wherein, the gap between the left side surface or the right side surface of the lower insert and the groove wall of the installation groove is less than or equal to 0.5 mm.

[0012] Wherein, the distance between the edge line of the lower insert and the projected edge line of the upper insert is greater than or equal to 50 mm.

[0013] The lower mold also includes a lower template fixedly installed at the bottom of the lower module, and two handles arranged at intervals are fixedly installed on the top surface of the lower template.

[0014] Among them, a plurality of spaced-apart hanging rings are fixedly installed on the top surface of the lower template.

[0015] Compared with the prior art, the embodiments of the utility model have the following beneficial effects: by designing the previous lower module in blocks, a lower insert covered with a rubber layer is added to the lower module, and the rubber layer can increase the contact friction between the covering and the lower insert, thereby increasing the friction between the lower module and the 3D-mesh covering, preventing the covering from moving during the welding process, thereby improving the appearance of the 3D-mesh covering and the airbag frame after welding, ensuring a neat and smooth appearance, and ensuring that the welding pull-off force meets the standard requirements, thereby improving the pass rate of the product welding process, solving the problem of poor welding effect in the past, reducing product manufacturing costs, and ensuring product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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 ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 is an exploded view of the upper die in the embodiment;

[0018] Figure 2 2 is a schematic structural diagram of the lower mold in the embodiment;

[0019] Figure 3 Schematic diagram of the structure of the lower mold in the embodiment from a top view. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] The terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, mechanism, product or end that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or ends.

[0022] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0023] The utility model discloses a specific implementation of a mold for friction welding of a 3D mesh cloth covering and an airbag frame. The mold comprises a lower mold 2 and an upper mold 1 arranged above the lower mold 2 .

[0024] Please see Figure 1 An upper insert 11 for loading an airbag frame 12 is fixedly mounted on the bottom surface of the upper mold 1 .

[0025] Please see Figure 2The top of the lower mold 2 is fixedly installed with a lower module 21 for loading a 3D mesh covering (3D-mesh covering). The top surface of the lower module 21 is provided with a mounting groove 22 located directly below the upper insert 11. The lower insert 3 is fixedly installed in the mounting groove 22. The outer surface of the lower insert 3 is coated with a rubber layer that can increase the contact friction between the covering and the lower insert 3. The rubber layer is preferably a rubber layer, because the rubber layer has a large friction coefficient, which can better solve the problem of movement, and the rubber layer is more wear-resistant and has a long service life. In this industry, the rubber layer can also be called a rubber cloth. This structure is essentially a block design of the previous lower module 21. By opening the mounting groove 22, a specific welding area is formed at the cavity area of ​​the lower mold 2 where the airbag frame 12 is originally welded. By adding a lower insert 3 coated with a rubber layer in the mounting groove 22, the friction between the covering and the lower mold 2 is increased by utilizing the large friction coefficient of the rubber layer, thereby solving the problem of movement of the covering during welding.

[0026] Optionally, the lower insert 3 is made of aluminum alloy, which is a standard material for welding molds and has the advantages of being easy to obtain, high hardness, and light weight. Of course, in other embodiments, a metal alloy with the same high hardness and light weight as aluminum alloy can also be used.

[0027] In this embodiment, the rubber layer coated on the outer surface of the lower insert 3 has a larger friction coefficient than the traditional PU rubber coating, which can better solve the problem of movement. In addition, the rubber layer is more wear-resistant than materials such as felt, thereby extending the service life of the mold. Optionally, the thickness of the rubber layer is 0.9mm to 1.1mm. As a preferred solution, the thickness of the rubber layer is 1mm. The 1mm thick rubber layer is a standard thickness on the market and is easy to obtain.

[0028] In this example, see Figure 3 The gap between the left side or right side of the lower insert 3 and the groove wall of the installation groove 22 is less than or equal to 0.5 mm. For details, see Figure 3 Controlling the gap within 0.5 mm can improve the appearance quality of the product after welding. If the gap is larger than 0.5 mm, a groove with too large a width will appear between the lower module 21 and the lower insert 3, which will cause an appearance mark on the product during welding, thus affecting the appearance of the product.

[0029] Please see Figure 3 The distance between the left side line or the right side line of the lower insert 3 and the projection side line of the upper insert 11 is greater than or equal to 50 mm. The projection side line is the projection outer contour line of the upper insert 11 vertically projected on the lower insert 3. For details, please refer to Figure 3During the welding process, if the left side line or the right side line of the lower insert 3 is very close to the position of the airbag frame 12 (for example, less than 50 mm), the covering part will be compressed during the welding process. Since the force at the position corresponding to the lower insert 3 is greater than that at other positions, if the top surface area of ​​the lower insert 3 is too small, it is easy to cause an appearance indentation on the product at the position of the lower insert 3, affecting the appearance quality of the product.

[0030] In this embodiment, if Figure 2 As shown, the lower mold 2 also includes a lower mold plate 23 fixedly mounted at the bottom of the lower mold block 21, and two handles 24 arranged at intervals are fixedly mounted on the top surface of the lower mold plate 23, and the handles 24 can facilitate the staff to move the lower mold 2. In addition, a plurality of lifting rings 25 arranged at intervals are fixedly mounted on the top surface of the lower mold plate 23, and the lifting rings 25 can assist in the lifting of the lower mold 2.

[0031] The mold of this embodiment designs the lower module 21 in blocks, and adds a lower insert 3 covered with a rubber layer in the lower module 21. The rubber layer can increase the friction between the lower module 21 and the 3D-mesh covering, and prevent the covering from moving during the welding process, thereby improving the appearance of the 3D-mesh covering and the airbag frame 12 after welding, ensuring a neat and smooth appearance, and ensuring that the welding pull-off force meets the standard requirements, thereby improving the qualified rate of the product welding process, solving the problem of poor welding effect in the past, reducing product manufacturing costs, and ensuring product quality.

[0032] Finally, it should be noted that the mold for friction welding of 3D mesh covering and airbag frame disclosed in the embodiment of the utility model only discloses the preferred embodiment of the utility model, which is only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A mold for friction welding of a 3D mesh cover and an airbag frame, comprising a lower mold and an upper mold arranged above the lower mold, wherein an upper insert for loading the airbag frame is fixedly installed on the bottom surface of the upper mold, It is characterized in that A lower module for loading a covering is fixedly installed on the top of the lower mold, a mounting groove is provided on the top surface of the lower module and is located directly below the upper insert, a lower insert is fixedly installed in the mounting groove, and an outer surface of the lower insert is covered with a rubber layer that can increase the contact friction between the covering and the lower insert.

2. A mold for friction welding of a 3D mesh cover and an airbag frame according to claim 1, It is characterized in that The lower insert is made of aluminum alloy.

3. A mold for friction welding of a 3D mesh cover and an airbag frame according to claim 1, It is characterized in that The adhesive layer is a rubber layer.

4. A mold for friction welding of a 3D mesh cover and an airbag frame according to claim 3, It is characterized in that The thickness of the rubber layer is 0.9 mm to 1.1 mm.

5. A mold for friction welding of a 3D mesh cover and an airbag frame according to claim 4, It is characterized in that The thickness of the rubber layer is 1 mm.

6. A mold for friction welding of a 3D mesh cover and an airbag frame according to any one of claims 1 to 5, It is characterized in that The gap between the left side surface or the right side surface of the lower insert and the groove wall of the installation groove is less than or equal to 0.5 mm.

7. A mold for friction welding of a 3D mesh cover and an airbag frame according to any one of claims 1 to 5, It is characterized in that The distance between the left side line or the right side line of the lower insert and the projected side line of the upper insert is greater than or equal to 50 mm.

8. A mold for friction welding of a 3D mesh cover and an airbag frame according to any one of claims 1 to 5, It is characterized in that The lower mold also includes a lower template fixedly mounted on the bottom of the lower module, and two handles arranged at intervals are fixedly mounted on the top surface of the lower template.

9. A mold for friction welding of a 3D mesh cover and an airbag frame according to claim 8, It is characterized in that A plurality of suspension rings arranged at intervals are also fixedly mounted on the top surface of the lower template.

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