WO2023078466A1

WO2023078466A1 - Automotive interior and manufacturing method therefor

Info

Publication number: WO2023078466A1
Application number: PCT/CN2022/131700
Authority: WO
Inventors: 赵铮; 杨杉苗; 朱波
Original assignee: 宁波拓普集团股份有限公司
Priority date: 2021-11-05
Filing date: 2022-11-14
Publication date: 2023-05-11
Also published as: CN113968192A

Abstract

An automobile interior and a manufacturing method therefor. The automobile interior comprises a substrate (1), a supporting frame (2), and reinforcing mesh cloth (3); the reinforcing mesh cloth (3) is arranged between the substrate (1) and the supporting frame (2); the substrate (1) comprises an airbag door (11); a weakening groove (12) is formed on the substrate (1); the extension line of the weakening groove (12) forms an edge of the airbag door (11); a connecting line between the two ends of the weakening groove (12) forms a rotating axis (13) of the airbag door (11); the reinforcing mesh cloth (3) comprises a first reinforcing portion (31) and a second reinforcing portion (32); the rotating axis (13) passes through the coverage region of the first reinforcing portion (31) on the substrate (1); the coverage region of the portion of the first reinforcing portion (31) extending from the position of the rotating axis (13) towards the interior of the airbag door (11) is located in the airbag door (11); the second reinforcing portion (32) is connected to the portion of the first reinforcing portion (31) located outside the airbag door (11); and the second reinforcing portion (32) covers an extension tearing region of the substrate (1).

Description

A kind of automotive interior parts and preparation method thereof

technical field

The invention relates to the technical field of auto parts, in particular to an auto interior trim and a preparation method thereof.

Background technique

In order to improve the safety of the vehicle, airbags will be installed on the steering wheel, instrument panel, door and other parts of the car. The airbag is installed in the interior parts of the car and is covered by the airbag door. Flip. In the prior art, a mesh cloth is arranged at the rotating shaft of the airbag door, and a fixing part is arranged on the base plate of the automobile interior trim, and the mesh cloth is fixed on the fixing part. When the airbag door is opened, the mesh will use its own strength to tightly fix the airbag door and the interior parts of the car to prevent the airbag door from tearing and flying out.

However, there are some shortcomings in the fixed structure using mesh. When the airbag door is opened, the mesh needs to bear most of the detonation force and tearing force. Therefore, the performance requirements for the mesh to withstand blasting tension, elongation and fracture are extremely high, and special processes are required. Weaving also requires special compression processing, which is expensive and expensive to produce; in addition, during the blasting process, the outer side of the airbag door near the rotating shaft is prone to extended tearing, and the airbag door will be blown out entirely and pulled back by the mesh. During this process, the trajectory of the airbag door cannot be controlled, which may cause physical damage to the driver and passengers.

Contents of the invention

The purpose of the present invention is to provide a new anti-tear structure for the airbag door. The technical problems to be solved are how to reduce the risk of the airbag door tearing and flying out, and how to reduce the manufacturing cost of the automotive interior parts.

In order to solve the above problems, the present invention provides an automotive interior part on the one hand, comprising a substrate, a support frame and a reinforcing mesh, the reinforcing mesh is arranged between the substrate and the supporting plate, and the substrate includes an airbag The base plate is provided with a weakening groove, the extension line of the weakening groove constitutes the edge of the airbag door, the connection line between the two ends of the weakening groove constitutes the rotation axis of the airbag door, and the reinforcing net The cloth includes a first reinforcement part and a second reinforcement part, the rotation axis passes through the coverage area of the first reinforcement part on the base plate, and the first reinforcement part moves from the rotation axis position toward the airbag door The coverage area of the inner extension part is located inside the airbag door, the second reinforcement part is in contact with the part of the first reinforcement part outside the airbag door, and the second reinforcement part covers the extended tear of the base plate. cracked area.

Compared with the prior art, the automotive interior part of the present invention is composed of a substrate, a support frame and a reinforcing mesh, and there are various forces between the three, such as friction between the reinforcing mesh, the substrate, and the supporting frame, and the reinforcement There is extrusion force between the mesh and the support frame, and there is a pull force between the support frame and the base plate. When the blast force generated by the opening of the airbag is transmitted to the rotating shaft area, it will be shared on the base plate, support frame and reinforced mesh. This reduces the risk of tearing and flying out of the airbag door, improves safety, and reduces the blasting force that the reinforced mesh needs to bear. The strength requirements for the reinforced mesh will be greatly reduced, and no special process is required, which saves production costs; The reinforcement mesh has a first reinforcement part and a second reinforcement part. The first reinforcement part reinforces the area of the rotating shaft. The first reinforcement part pulls the airbag door and makes it rotate along the rotation axis to avoid splashing of debris. The second reinforcement part is for the substrate The extended tearing area has been strengthened, which can effectively prevent the transitional weak area adjacent to the substrate and the rotating shaft from extending and breaking during blasting, ensuring that the airbag door can be flipped along the rotating axis and improving safety; the reinforced mesh also protects the overall automotive interior parts Play a structural strengthening role, so that it can better withstand the pressure generated by the airbag installation point and the insert installation point on the part, making the whole part more difficult to deform.

In a preferred or optional embodiment, the length of the portion corresponding to the first reinforcing portion and the rotation axis is less than or equal to the length of the rotation axis. In this way, the first reinforcing part will not cover the weakening groove, ensuring that the airbag door can be torn along the weakening groove. When the length of the corresponding part of the first reinforcing part and the rotation axis is equal to the length of the rotation axis, the reinforcement effect is the best. The strength requirements for the reinforcement mesh are the lowest.

In a preferred or optional embodiment, the first reinforcement part is quadrilateral, the bottom edge of the first reinforcement part is connected to the second reinforcement part, and the top edge of the first reinforcement part is located at the In the area of the airbag door, the two sides of the first reinforcement part intersect with the rotation axis. This facilitates the processing and shaping of the first reinforcing part, and also facilitates its positioning and installation on the substrate.

In a preferred or optional embodiment, the angle between the side of the first reinforcing part and the extension of the rotation axis is 0°-90°, preferably 0°-60°. The oblique setting of the side of the first reinforcing part can increase the coverage area of the first reinforcing part in the airbag door, thereby increasing the area where the first reinforcing part interacts with the base plate and the support frame, preventing the first reinforcing part from being torn and damaged, and improving the performance of the first reinforcing part. reliability.

In a preferred or optional embodiment, a top edge of the second reinforcement part is in contact with the first reinforcement part, and a top edge of the second reinforcement part is parallel to the rotation axis. In this way, the second reinforcing part can cover the adjacent part of the rotation axis, and effectively reinforce the part prone to elongation fracture.

In a preferred or optional embodiment, the side and bottom of the second reinforcement part are aligned with the edge of the base plate. Therefore, the second reinforcement part extends all the way to the edge of the substrate, and there is no weakened transition area on the substrate, so no tearing will occur at the junction of the second reinforcement part and the substrate.

In a preferred or optional embodiment, the reinforcing mesh further includes a third reinforcing part, the third reinforcing part is connected to the top edge of the second reinforcing part, and the third reinforcing part is on the The footprint on the substrate is located outside the air bag door. Tearing may also occur along the junction of the top edge of the second reinforcing part and the substrate, so the provision of the third reinforcing part can prevent tearing from occurring here.

In a preferred or optional embodiment, the number of the third reinforcement is two, and the two third reinforcements are respectively arranged on both sides of the first reinforcement. In this way, a third reinforcing part is respectively provided on both sides of the first reinforcing part, so as to prevent extended tearing on both sides of the airbag door.

In a preferred or optional embodiment, the third reinforcement part is triangular or quadrilateral, and the bottom edge of the third reinforcement part is in contact with the second reinforcement part. This facilitates the processing and shaping of the third reinforcing portion.

In a preferred or optional embodiment, the bottom edge of the third reinforcement part is parallel to the rotation axis, and the third reinforcement part is close to the angle between the side edge and the bottom edge of the first reinforcement part. 0°-180°, preferably 45°-90°. Thus, the side edge of the third reinforcement part forms an included angle with the direction where tearing may occur, which can improve the tear-proof effect.

In a preferred or optional embodiment, a side of the third reinforcement part away from the first reinforcement part is aligned with an edge of the substrate. Thus, the third reinforcing portion extends all the way to the edge of the substrate, preventing tearing at the interface between the third reinforcing portion and the substrate.

In a preferred or optional embodiment, the reinforcing mesh is woven from stressed threads, and the stressed threads are woven from one or more yarns. Therefore, the performance of the reinforced mesh can be adjusted by increasing the number of yarns, without the need for special processes or materials, and the production cost is low.

In a preferred or optional embodiment, the stressed thread is braided by one or more yarns of aramid thread, PET thread or PP thread. Therefore, the stress line has no special requirements on the material, and the production cost is relatively low.

In a preferred or optional embodiment, the elongation of the stress line is 10%-100%. In this way, the performance of the force line is limited, and the overall impact resistance of the reinforced mesh is guaranteed.

In a preferred or optional embodiment, the breaking strength of the stress line is 500N/cm-50000N/cm. In this way, the performance of the force line is limited, and the overall impact resistance of the reinforced mesh is guaranteed.

In a preferred or optional embodiment, the reinforcing mesh is embedded in the surface of the substrate. This strengthens the reliable positioning of the mesh cloth without shifting, the appearance of the substrate is smoother, and there is no need to set up a fixed structure, which can reduce process steps and improve production efficiency.

In a preferred or optional embodiment, the reinforcing mesh has a mesh, and the supporting frame covers the mesh and passes through the mesh. Therefore, the supporting frame can make the positioning of the reinforcing mesh more reliable, and an action force is generated between the supporting frame and the reinforcing mesh, which can share the blasting force generated by the opening of the airbag.

In a preferred or optional embodiment, the shape of the mesh is square, circular, rectangular, triangular or regular hexagonal. Therefore, the shape of the mesh can be set according to requirements, and the strength of the reinforcing mesh and the force between it and the substrate and the supporting frame can be changed by adjusting the shape of the mesh.

In a preferred or optional embodiment, the mesh has an area of 0.1 cm ² -1.5 cm ² . Therefore, the mesh size can be set according to requirements, and the strength of the reinforcing mesh and the force between it and the substrate and the supporting frame can be changed by adjusting the mesh size.

In a preferred or optional embodiment, the support frame includes a skeleton part and an opening part, the skeleton part has an airbag opening, the opening part is arranged in the airbag opening, the opening part and the rotation axis The corresponding side is connected with the skeleton part through the connecting rib. Therefore, when the airbag is opened, a part of the energy generated by the explosion is absorbed by the self-fracture of the connecting ribs, and then the remaining energy is transmitted to the base plate, so that the shaft area is less likely to shake and improves safety.

In a preferred or optional embodiment, a notch is provided on the side of the connecting rib away from the base plate. In this way, the fracture position of the connecting rib can be controlled, and damage to other parts can be avoided.

In a preferred or optional embodiment, the skeleton part includes support ribs, and the height of the support ribs is 3mm-50mm, preferably 3mm-4mm. Therefore, the height of the support rib is limited to ensure that it has a high impact resistance and will not be damaged.

In a preferred or optional embodiment, the thickness of the support ribs is 0.1mm-20mm, preferably 1.5mm-2mm. Therefore, by adjusting the thickness of the support ribs, the support frame and the reinforcing mesh can have a larger contact area, thereby having a greater pull-out force.

In a preferred or optional embodiment, the opening part includes reinforcing ribs, and the height of the reinforcing ribs is 2mm-40mm, preferably 2mm-4mm. Therefore, the height of the reinforcing rib is limited to ensure that it has high impact resistance and will not be damaged.

In a preferred or optional embodiment, the thickness of the reinforcing rib is 0.1mm-15mm, preferably 0.3mm-0.5mm. Therefore, by adjusting the thickness of the reinforcing ribs, the supporting frame and the reinforcing mesh can have a larger contact area, thereby having a greater pull-out force.

Another aspect of the present invention provides a kind of preparation method of automotive interior trim, comprises the following steps:

S1. The base plate and the reinforced mesh are preheated, and the reinforced mesh is positioned at a fixed position near the axis of rotation on the base plate;

S2. Put the substrate with the reinforced mesh positioned into the mould, close the mold and stamp, remove excess material, and press the reinforced mesh into the surface of the substrate;

S3. Injecting a supporting plate on the surface of the substrate, and fixing the reinforcing mesh between the substrate and the supporting plate to obtain an automotive interior part.

Compared with the prior art, the preparation method has fewer process steps, simple production method, can improve production efficiency and reduce production cost. This method presses the reinforced mesh into the surface of the substrate by stamping to ensure that the position of the reinforced mesh will not shift. During the injection molding process of the support plate, part of the molten plastic passes through the gap of the reinforced mesh, and the other part and the reinforced mesh The reinforcement mesh is further tightly fixed between the substrate and the support frame, so that there is friction between the reinforcement mesh, the substrate and the support frame, and the support frame generates extrusion and pulling forces on the reinforcement mesh, and the airbag When opened, the blasting force will be distributed to the base plate, support frame and reinforced mesh at the same time, preventing the airbag door from flying out and improving safety.

Description of drawings

Fig. 1 is a front structural view of an automobile interior trim according to an embodiment of the present invention.

Fig. 2 is a back structural view of an automobile interior trim according to an embodiment of the present invention.

Fig. 3 is a structural diagram of a substrate of an automotive interior trim according to an embodiment of the present invention.

Fig. 4 is a structural diagram of a reinforcing mesh of an automotive interior part according to an embodiment of the present invention.

Fig. 5 is a structural diagram of a supporting frame of an automobile interior trim according to an embodiment of the present invention.

Fig. 6 is a schematic diagram of the coverage area of the reinforcing mesh of the automotive interior part according to the embodiment of the present invention.

Fig. 7 is a schematic diagram of the coverage area of the reinforced mesh of the automotive interior part according to another embodiment of the present invention.

Fig. 8 is a schematic diagram of the coverage area of the reinforced mesh of the automotive interior part according to another embodiment of the present invention.

Explanation of reference signs:

1-base plate, 11-airbag door, 12-weakening groove, 13-rotation axis, 2-support frame, 21-skeleton part, 22-opening part, 23-airbag opening, 24-connecting rib, 25-supporting rib, 26-reinforcing ribs, 27-pressure ribs, 3-reinforcing mesh, 31-the first reinforcing part, 32-the second reinforcing part, 33-the third reinforcing part, α-the side of the first reinforcing part and the extension of the axis of rotation The included angle between the lines, β-the included angle between the side edge and the bottom edge of the third reinforcing part.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that similar symbols and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "front", "back" and the like indicate the orientation or position The relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that the inventive product is usually placed in use, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and therefore should not be construed as limitations on the invention. In the accompanying drawings of the embodiment of the present invention, a coordinate system XYZ is set, wherein the positive direction of the X-axis represents the front, the reverse direction of the X-axis represents the rear, the positive direction of the Y-axis represents the right, and the reverse direction of the Y-axis represents the left. The positive direction of the Z axis represents the upward direction, and the negative direction of the Z axis represents the downward direction.

In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "setting", "connection", etc. should be understood in a broad sense, such as "connection", which can be a fixed connection, It can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

As shown in FIG. 1 to FIG. 6 , this embodiment provides an automotive interior trim, which includes a base plate 1 , a reinforcing mesh 3 and a support frame 2 arranged in sequence. The base plate 1 includes an airbag door 11, and the base plate 1 is provided with a depressed weakening groove 12. The extension line of the weakening groove 12 is an unclosed geometric shape, which constitutes the edge of the airbag door 11, and the connection between the two ends of the weakening groove 12 The line constitutes the rotation axis 13 of the airbag door 11, and the rotation axis 13 is shown as a dotted line in FIG. 1 . The support frame 2 is arranged on the back of the base plate 1 , and the airbag of an automobile is suitable for being arranged on the support frame 2 . The reinforcing mesh 3 is arranged between the base plate 1 and the support frame 2, which plays a structural strengthening role, so that the automotive interior parts can better withstand the local pressure on the part from the airbag installation point and the insert installation point, making the whole part more stable. Not easily deformed.

Explosive force is generated when the airbag is opened, and the airbag door 11 is torn along the weakening groove 12 and turned over along the rotation axis 13 . Due to the relatively large blasting force, in order to prevent tearing at the rotating axis 13, a reinforcing mesh cloth 3 is provided for structural reinforcement. As shown in Figure 4, the reinforced mesh 3 includes a first reinforced portion 31 and a second reinforced portion 32, and the axis of rotation 13 passes through the coverage area of the first reinforced portion 31 on the substrate 1, that is, the first reinforced portion 31 spans The axis of rotation 13 can strengthen the area of the axis of rotation. The part where the first reinforcement part 31 extends from the rotation axis 13 toward the inside of the airbag door 11, that is, the coverage area of the first reinforcement part 31 above the rotation axis 13 on the base plate 1 is located in the airbag door 11, and will not affect the airbag door 11. Tear along the weakened groove 12.

In addition to the part of the rotation axis 13 on the substrate 1 that needs to withstand a large blasting force, the adjacent parts of the rotation axis 13 also have the risk of extended tearing. The part on the substrate 1 that may cause extended tearing is defined as the extended tearing area. In this embodiment, the extended tearing area is located below the rotation axis 13 , as shown in the area inside the dotted line in FIG. 3 . In other embodiments, the extended tear area is determined by the structure of the substrate 1 . The second reinforcing part 32 of the reinforcing mesh 3 is arranged on the lower side of the first reinforcing part 31, and is in contact with the part of the first reinforcing part 31 outside the airbag door 11. The second reinforcing part 32 covers the extended tear of the substrate 1. area. The second reinforcement part 32 strengthens the extended tearing area of the base plate 1, which can effectively prevent the transitional weak area adjacent to the base plate 1 from the rotation axis 13 from extending and breaking during blasting, so as to ensure that the airbag door 11 is turned over along the rotation axis 13, improving safety.

The automobile interior part of the present embodiment is made of substrate 1, support frame 2 and reinforcement mesh 3, and there are various forces between the three, such as friction between the reinforcement mesh 3 and substrate 1, support frame 2, There is extrusion force between the reinforced mesh 3 and the support frame 2, and there is a pulling force between the support frame 2 and the substrate 1. When the blasting force generated by the opening of the airbag is transmitted to the area of the rotation axis 13, it will be shared among the substrate 1 and the support. Frame 2 and reinforced mesh 3, thereby reducing the risk of airbag door 11 tearing and flying out, improving safety, and reducing the blasting force that reinforced mesh 3 needs to withstand, and the strength requirements for reinforced mesh 3 will be greatly increased. drop, no need for special processing, saving production costs.

Further, as shown in FIG. 2 , the reinforcing mesh 3 is embedded on the surface of the substrate 1 to ensure that the reinforcing mesh 3 is positioned reliably without shifting, and the appearance of the substrate 1 is smoother. Furthermore, the reinforcement mesh 3 is fixed by embedding, and no fixing structure is required, which can reduce the overall weight of the automotive interior parts, reduce production process steps, and improve production efficiency.

In this embodiment, the material of the substrate 1 is NFPP board, and in other implementation manners, the substrate 1 can be made of fiberboard made of other materials, such as PPGF. Compared with injection molded parts, fiberboard is more environmentally friendly and durable. The support frame 2 is an injection molded part, which is injection molded on the back of the substrate 1 to form a reliable connection with the substrate 1 . During the injection molding process of the support frame 2 , part of the molten plastic passes through the gap of the reinforcement mesh 3 , and the other part is fused with the reinforcement mesh 3 , further fixing the reinforcement mesh 3 tightly between the base plate 1 and the support frame 2 .

The reinforced mesh 3 has a mesh, and the supporting frame 2 covers the mesh and passes through the mesh, so that the supporting frame 2 can make the positioning of the reinforced mesh 3 more reliable, and increase the force between the supporting frame 2 and the reinforced mesh 3, which can be shared The explosive force generated by the deployment of the airbag.

As shown in FIG. 5 , the support frame 2 includes a skeleton portion 21 and an opening portion 22 , the skeleton portion 21 has an airbag opening 23 , the position of the airbag opening 23 corresponds to the airbag door 11 , and the opening portion 22 is disposed in the airbag opening 23 . The bottom edge of the opening part 22 corresponds to the position of the axis of rotation 13, the bottom edge of the opening part 22 is connected with the skeleton part 21 through the connecting rib 24, and there is a gap between the other sides and the skeleton part 21, so that the support frame 2 will not interfere The airbag door 11 is torn along the weakening groove 12, and ensures that the airbag door 11 rotates along the rotating shaft when it is opened. In this embodiment, the number of connecting ribs 24 is four, and in other embodiments, the number of connecting ribs 24 may be 2-12. When the airbag is opened, the connecting rib 24 breaks itself, which can absorb part of the energy generated by the blast, and then the remaining energy will be transmitted to the base plate 1, so that the shaft area is less likely to shake, reducing the possibility of tearing the reinforcing mesh 3 and improving safety. sex.

Further, a notch is provided at the front of the connecting rib 24, and the opening of the notch faces the base plate 1, and the notch can be V-shaped, arc-shaped, U-shaped, trapezoidal or other shapes. The breaking position of the connecting ribs 24 can be controlled by setting the gaps, so as to ensure that the connecting ribs 24 break automatically when the airbag is opened, and avoid damage to other parts of the support frame 3 .

The skeleton part 21 includes support ribs 25, and the structure of the support ribs 25 in this embodiment is a honeycomb shape, which can reduce the weight of the support frame 2 while ensuring the structural strength. In other embodiments, the structure of the supporting ribs 25 may be square, triangular, circular, etc. The supporting ribs 25 are in contact with the reinforcing mesh 3 , which can increase the pressing force and pulling force of the supporting frame 2 on the second reinforcing portion 32 in the reinforcing mesh 3 . In this embodiment, the height of the support ribs 25 in the front-rear direction is 4mm, the thickness is 1.5mm, and the draft angle is 5°. In other embodiments, the height of the support ribs 25 is controlled at 3mm-50mm, preferably 3mm-4mm; the thickness is controlled at 0.1mm-20mm, preferably 1.5mm-2mm; the draft angle is 0°-15°. The height of the support rib 25 is limited to ensure that it has high impact resistance and will not be damaged. By adjusting the thickness of the support rib 25, the support frame 2 and the reinforcing mesh 3 can have a larger contact area, thereby increasing their interaction. force.

The frame part 21 further includes a bead 27 disposed around the opening 23 of the airbag, and the bead 27 is in contact with the edge of the second reinforcing part 32 in the reinforcing mesh 3 . In the present embodiment, the form of the bead 27 is cross-shaped, and the thickness is 5mm. The contact area between it and the reinforcing mesh 3 tools is relatively large, thereby obtaining a larger pulling force. For the edge of the second reinforcing part 32, That is, the parts most prone to elongation tearing are reinforced. In other embodiments, the bead 27 can be in the form of a rice-shaped, grid-shaped, grid-shaped structure, etc., with a thickness of 1mm-8mm, so as to ensure a large contact area between the bead 27 and the reinforcing mesh 3 .

The opening part 22 includes reinforcing ribs 26, and the structure of the reinforcing ribs 26 in this embodiment is a honeycomb shape, which reduces the weight of the supporting frame 2 while ensuring the structural strength. In other embodiments, the structure of the reinforcing rib 26 may be square, triangular, circular, etc. FIG. The reinforcing ribs 26 are in contact with the reinforcing mesh 3 to increase the pressing force and pulling force of the supporting frame 2 on the first reinforcing portion 31 of the reinforcing mesh 3 . In this embodiment, the height of the reinforcing rib 26 in the front-rear direction is 4 mm, and the thickness is 0.5 mm. In other embodiments, the height of the reinforcing rib 26 is controlled at 2mm-40mm, preferably 2mm-4mm; the thickness is controlled at 0.1mm-15mm, preferably 0.3mm-0.5mm. Limit the height of the reinforcing rib 26 to ensure that it has high impact resistance and will not be damaged. By adjusting the thickness of the reinforcing rib 26, the supporting frame 2 and the reinforcing mesh 3 can have a larger contact area, thereby having a larger force.

As shown in FIG. 6 , the reinforcing mesh 3 includes a first reinforcing part 31 and a second reinforcing part 32 , the first reinforcing part 31 is rectangular, and it is easy to process, shape, position and install. The dotted line in the figure is the boundary line between the first reinforcement part 31 and the second reinforcement part 32. The bottom edge of the first reinforcement part 31 is in contact with the second reinforcement part 32, the top edge is located in the area of the airbag door 11, and the two sides are in contact with the rotation. Axes 13 intersect.

The first reinforcing part 31 can strengthen the part of the rotating shaft across the rotating axis 13. In other embodiments, the first reinforcing part 31 can be in other geometric shapes, such as trapezoidal, semicircular, triangular, etc., and can also be composed of multiple Composed of discontinuous parts, such as grid structures, etc. Preferably, the first reinforcement part 31 is quadrilateral, which is convenient for processing and forming the first reinforcement part 31 , and also facilitates its positioning and installation on the substrate 1 .

In this embodiment, the first reinforcing portion 31 is rectangular, and the angle α between its side and the extension of the rotation axis 13 is 90°. In other embodiments, 90°≥α≥0°, more preferably 60°≥α>0°, such that the inclined side of the first reinforcement part 31 can increase the coverage of the first reinforcement part 31 in the airbag door 11 area, thereby increasing the interaction force between the first reinforcement part 31 and the substrate 1 and the support frame 2, preventing the first reinforcement part 31 from being torn and damaged, and improving reliability.

The length of the part corresponding to the first reinforcement part 31 and the rotation axis 13 should be less than or equal to the length of the rotation axis 13 to prevent the first reinforcement part 31 from covering the weakening groove 12 and interfering with the tearing of the airbag door 11 along the weakening groove 12 . In this embodiment, the length of the first reinforcing part 31 and the corresponding part of the rotation axis 13 is equal to the length of the rotation axis 13, and it has strengthened all parts of the rotation axis 13, and the reinforcement effect is good, and the reinforcement mesh 3 can also be reduced. Strength requirements, saving production costs.

The top edge of the second reinforcement part 32 is in contact with the first reinforcement part 31, the second reinforcement part 32 covers the extended tearing area of the substrate 1, and the top edge of the second reinforcement part 32 is arranged parallel to the rotation axis 13, thereby ensuring The second reinforcing part 32 can cover the adjacent parts of the rotation axis 13 and effectively reinforce the parts prone to elongation fracture.

Further, the second reinforcement part 32 extends to the edge of the substrate 1, and the side and bottom edges of the second reinforcement part 32 are aligned with the edge of the substrate 1, so that there is no weakened transition area on the substrate 1, and there will be no The interface between the second reinforcing part 32 and the base plate 1 is torn, and the base plate 1 is strengthened as a whole.

In the automotive interior part of this embodiment, the blasting force of the airbag is shared by the substrate 1 , the support frame 2 and the reinforcing mesh 3 , so the requirements for the performance of the reinforcing mesh 3 itself are reduced. The reinforced mesh 3 is woven from stress-bearing threads and does not need to be processed by a special process, so the production cost is greatly reduced. The stress line can be woven from yarns of one or more materials, such as aramid thread, PET thread, PP thread, etc. Compared with the existing mesh cloth, the material cost is greatly reduced. The tension thread can also be woven from one or more yarns, and the performance can be adjusted by increasing the number of yarns. The reinforcing mesh 3 can also be composed of multiple layers of mesh, so as to reduce the strength requirement for a single layer of mesh and further improve reliability and safety.

Further, the performance of the stress line is defined, its elongation is 10%-100%, and the breaking strength is 500N/cm-50000N/cm, so as to ensure the overall impact bearing capacity of the reinforcing mesh 3 . In this embodiment, the stress line is braided by a plurality of aramid threads, the elongation rate is 40%, and the breaking strength is 10000 N/cm.

The mesh structure of the reinforcing mesh cloth 3 will also affect the performance. In this embodiment, the shape of the mesh is square, and the area of a single mesh is 0.5 cm ² . In other embodiments, the shape of the mesh can be circular, rectangular, triangular or regular hexagonal, etc., and the area of the mesh is controlled within 0.1 cm ² -1.5 cm ² . The strength of the reinforcing mesh 3 , as well as the contact area and force between the reinforcing mesh 3 and the substrate 1 and the supporting frame 2 can be changed by adjusting the structure and size of the mesh.

As shown in FIG. 7 , this embodiment provides another automotive interior trim, which differs from the above embodiments in the structure of the reinforcing mesh 3 . In this embodiment, the mesh of the reinforcement mesh 3 is triangular, and the area of a single mesh is 1 cm ² . The reinforced mesh 3 includes a first reinforced portion 31 and a second reinforced portion 32 , and the dotted line in the figure is the boundary line between the first reinforced portion 31 and the second reinforced portion 32 . The first reinforcing part 31 is trapezoidal, completely covering the axis of rotation 13, its bottom edge is located below the axis of rotation 13, and is connected to the second reinforcement part 32, its top edge is located in the airbag door 11, and its two sides intersect with the axis of rotation 13 . The included angle between the side of the first reinforcement part 31 and the extension of the rotation axis 13 is 60°. Compared with the rectangular structure, the trapezoidal first reinforcement part 31 can increase its coverage area in the airbag door 11, thereby increasing The area where the first reinforcement part 31 interacts with the substrate 1 and the support frame 2 prevents the first reinforcement part 31 from being torn and damaged, and improves reliability.

As described in conjunction with FIG. 8 , this embodiment provides another automotive interior trim, which differs from the above embodiments in the structure of the reinforcing mesh 3 . In this embodiment, the mesh of the reinforcing mesh 3 is a regular hexagon, and the area of a single mesh is 0.8 cm ² . The reinforced mesh 3 includes a first reinforced part 31 , a second reinforced part 32 and a third reinforced part 33 , and the dotted line in the figure is the boundary line between the reinforced parts. The first reinforcement part 31 is rectangular and completely covers the axis of rotation 13. Its bottom edge is located below the axis of rotation 13 and connects with the second reinforcement part 32. Its top edge is located in the airbag door 11 and its two sides intersect with the axis of rotation 13. . The third reinforcement part 33 is in contact with the top edge of the second reinforcement part 32 , and the coverage area of the third reinforcement part 33 on the base plate 1 is located outside the airbag door 11 . The third reinforcing part 33 is used to strengthen the junction between the top edge of the second reinforcing part 32 and the substrate 1 to prevent extension tearing here. There are two third reinforcing parts 33 , which are respectively arranged on the left and right sides of the first reinforcing part 31 , so as to prevent the substrate 1 from extending and tearing at the two sides of the airbag door 11 .

In this embodiment, the third reinforcing portion 33 is triangular, and in other implementation manners, the third reinforcing portion 33 may also be quadrilateral. The bottom edge of the third reinforcement part 33 is connected to the second reinforcement part 32, and the bottom edge is parallel to the rotation axis 13, and the angle β between the side edge close to the first reinforcement part 31 and the bottom edge is 60°, thus The side of the third reinforcing portion 33 forms an included angle with the direction where tearing is most likely to occur, which can improve the tear-proof effect. In other embodiments, 180°>β>0°, preferably 45°-90°.

Further, the side of the third reinforcing part 33 away from the first reinforcing part 31 extends toward the edge of the substrate 1 until the side edge is aligned with the edge of the substrate 1, thereby preventing the third reinforcing part 33 from being torn at the junction of the substrate 1 crack.

In the prior art, the grid cloth is fixed by the fixing parts in the automotive interior parts, which needs to use a double-material injection molding process, and two injection moldings are performed through two molds, and the equipment cost is high and the production efficiency is low. Another embodiment of the present invention provides a method for preparing an automotive interior trim, which is used to prepare the automotive interior trim of the above embodiment, comprising the following steps:

S1, positioning assembly

The substrate 1 and the reinforced mesh 3 are preheated, and the substrate 1 is first baked to a suitable temperature, and the preheated reinforced mesh 3 is positioned to a fixed position near the rotation axis 13 of the substrate 1 with a mechanical arm, and the positioning is performed by the tooling, dic The camera compares the positioning position to ensure accurate positioning.

S2, punching and molding

Put the substrate 1 with the reinforced mesh 3 positioned into the mold, fix the substrate 1 on the fixed mold, and pre-press for a certain time and pressure; continue to close the mold and cut off the excess reinforced mesh 3 and substrate 1; maintain the pressure to the set value At this time, the reinforcement mesh 3 is embedded on the surface of the substrate 1 to make the appearance of the substrate 1 smooth.

S3, injection molding

The molten injection plastic flows out from the gate of the injection mold to form a support frame 2, and the support frame 2 covers part of the reinforced mesh 3 area, and part of the molten plastic will pass through the mesh of the reinforced mesh 3, and the other part will fuse with the reinforced mesh 3 body , and further tightly fix the reinforcing mesh 3 embedded on the surface of the substrate 1 between the support frame 2 and the substrate 1 to obtain an automotive interior part. The reinforced mesh 3 of the automotive interior part is subject to various forces, including the friction between the reinforced mesh 3 and the substrate 1 and the supporting frame 2, the extrusion force and the pulling force between the supporting frame 2 and the reinforced mesh 3 Pulling force, etc., when the airbag is opened, the blasting force will be distributed to the base plate 1, the support frame 2 and the reinforcing mesh 3 at the same time, so as to avoid the tearing of the reinforcing mesh 3 and cause the airbag door 11 to fly out, thereby improving safety.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims

An automotive interior part, characterized in that it comprises a substrate (1), a support frame (2) and a reinforcing mesh (3), the reinforcing mesh (3) is arranged on the substrate (1) and the support Between the plates, the base plate (1) includes an airbag door (11), the base plate (1) is provided with a weakening groove (12), and the extension line of the weakening groove (12) constitutes the airbag door (11) The edge of the weakening groove (12) constitutes the rotation axis (13) of the airbag door (11), and the reinforcement mesh (3) includes a first reinforcement part (31) and a second reinforcement part (31) Two reinforcement parts (32), the rotation axis (13) passes through the coverage area of the first reinforcement part (31) on the substrate (1), and the first reinforcement part (31) is separated from the rotation The coverage area where the position of the axis (13) extends toward the inside of the airbag door (11) is located in the airbag door (11), and the second reinforcement part (32) and the first reinforcement part (31) are located in the airbag door (11). The part outside the airbag door (11) is connected, and the second reinforcement part (32) covers the extended tearing area of the base plate (1).
The automobile interior part according to claim 1, characterized in that, the length of the corresponding portion of the first reinforcing portion (31) to the rotation axis (13) is less than or equal to the length of the rotation axis (13).
The automobile interior trim according to claim 2, characterized in that, the first reinforcement part (31) is quadrilateral, and the bottom edge of the first reinforcement part (31) is in contact with the second reinforcement part (32) Contiguously, the top side of the first reinforcement part (31) is located in the area of the airbag door (11), and the two sides of the first reinforcement part (31) intersect with the rotation axis (13).
The automotive interior part according to claim 3, characterized in that, the angle between the side of the first reinforcing part (31) and the extension line of the rotation axis (13) is 0°-90°, Preferably it is 0°-60°.
The automotive interior part according to claim 1, characterized in that, the top edge of the second reinforcement part (32) is in contact with the first reinforcement part (31), and the second reinforcement part (32) The top edge is parallel to the axis of rotation (13).
The automotive interior part according to claim 5, characterized in that, the side and bottom of the second reinforcing portion (32) are aligned with the edge of the base plate (1).
The automotive interior part according to claim 5, characterized in that, the reinforcing mesh (3) further comprises a third reinforcing part (33), and the third reinforcing part (33) and the second reinforcing part The top edges of (32) are connected, and the coverage area of the third reinforcing part (33) on the base plate (1) is located outside the airbag door (11).
According to the automobile interior decoration according to claim 7, it is characterized in that, the quantity of the third reinforcement part (33) is two, and the two third reinforcement parts (33) are respectively arranged on the first reinforcement Both sides of the part (31).
The automotive interior part according to claim 7, characterized in that, the third reinforcement part (33) is triangular or quadrilateral, and the bottom edge of the third reinforcement part (33) is in contact with the second reinforcement part ( 32) Connect.
The automotive interior trim according to claim 9, characterized in that, the bottom edge of the third reinforcement part (33) is parallel to the rotation axis (13), and the third reinforcement part (33) is close to the The angle between the side edge and the bottom edge of the first reinforcing part (31) is 0°-180°, preferably 45°-90°.
The automotive interior part according to claim 9, characterized in that, the side of the third reinforcing part (33) away from the first reinforcing part (31) is aligned with the edge of the base plate (1).
According to any one of claims 1-11, the automotive interior trim, characterized in that, the reinforcing mesh (3) is woven from stressed threads, and the stressed threads are woven from one or more yarns made.
The automotive interior part according to claim 12, characterized in that, the stress-bearing wires are braided by one or more yarns among aramid yarns, PET yarns or PP yarns.
The automotive interior part according to claim 12, characterized in that, the elongation of the stress line is 10%-100%.
The automotive interior part according to claim 12, characterized in that, the breaking strength of the stressed line is 500N/cm-50000N/cm.
The automotive interior part according to any one of claims 1-11, characterized in that, the reinforcing mesh (3) is embedded in the surface of the substrate (1).
The automotive interior part according to any one of claims 1-11, characterized in that, the reinforcing mesh (3) has a mesh, and the supporting frame (2) covers the mesh part and passes through the mesh.
The automobile interior part according to claim 17, characterized in that, the shape of the mesh is square, circular, rectangular, triangular or regular hexagonal.
The automotive interior part according to claim 17, characterized in that the area of the mesh is 0.1 cm 2 -1.5 cm 2 .
The automotive interior trim according to any one of claims 1-11, characterized in that, the support frame (2) comprises a skeleton part (21) and an opening part (22), and the skeleton part (21) has an airbag opening (23), the opening part (22) is arranged in the airbag opening (23), and the side of the opening part (22) corresponding to the rotation axis (13) is connected to the The skeleton part (21) is connected.
The automotive interior part according to claim 20, characterized in that a notch is provided on the side of the connecting rib (24) away from the base plate (1).
The automotive interior part according to claim 20, characterized in that, the skeleton part (21) includes support ribs (25), and the height of the support ribs (25) is 3mm-50mm, preferably 3-4mm.
The automobile interior part according to claim 22, characterized in that, the thickness of the support rib (25) is 0.1mm-20mm, preferably 1.5mm-2mm.
The automotive interior part according to claim 20, characterized in that, the opening portion (22) includes a reinforcing rib (26), and the height of the reinforcing rib (26) is 2mm-40mm, preferably 2mm-4mm.
The automotive interior part according to claim 24, characterized in that, the thickness of the reinforcing rib (26) is 0.1mm-15mm, preferably 0.3mm-0.5mm.
A method for preparing an automotive interior trim according to any one of claims 1-25, comprising the following steps:

S1. The substrate (1) and the reinforced mesh (3) are preheated, and the reinforced mesh (3) is positioned at a fixed position near the upper rotation axis (13) of the substrate (1);

S2. Put the substrate (1) with the reinforced mesh (3) positioned into the mould, the mold is clamped and stamped, excess material is removed, and the reinforced mesh (3) is pressed into the surface of the substrate (1);

S3. Injecting a support plate on the surface of the base plate (1), fixing the reinforcing mesh (3) between the base plate (1) and the support plate, to obtain an automotive interior part.