Automatic folding method, folding structure and folding tool for air bag

Abstract

The invention discloses an automatic folding method, a folding structure and a folding tool for an air bag, and the automatic folding method comprises the following steps: flatly laying the air bag, and arranging an air inlet of the air bag and a pre-provided gas generator profiling block in a matched manner; an ejector rod penetrates through the gas generator profiling block and the gas inlet of the gas bag to eject the upper cloth piece of the gas bag; gathering the airbag from the edge to the gas generator profiling block to form a gathering structure; the ejector rod is pulled out of the gathering structure, so that the jacked part of the upper cloth piece of the air bag freely falls onto the gathering structure; and the jacked part of the upper cloth piece freely falling onto the gathering structure and the gathering structure are subjected to pushing and pressing forming. After the air bag is unfolded, the upper cloth piece can first impact the weakening line part of the air bag cover, so that the problems that when an existing automatic folding preassembling structure is folded, the air bag is wrinkled, and the center position of the air bag is deviated are solved.

Description

Technical Field

[0001] The invention relates to the technical field of safety airbags, and in particular to an automatic folding method, a folding structure and a folding tool for an airbag. Background Art

[0002] When the airbag is automatically folded, the airbag is usually assembled with the gas generator imitation block first, and then the airbag is laid flat on the automatic folding tooling. The automatic folding tooling pushes the airbag toward the middle, and finally hot-presses the airbag to form a folded pre-assembled structure.

[0003] In the prior art, when the airbag is pushed by the automatic folding tool, the edge of the airbag gathers disorderly toward the gas generator profiling block, so that the upper surface of the formed folded pre-installed structure has extrusion wrinkles and the center position of the airbag upper cloth sheet is offset. Therefore, when the folded pre-installed structure is installed to the predetermined position and covered by the airbag cover and is detonated, the extrusion wrinkles on the folded pre-installed structure will cause the non-weakened line part (the part that the weakened line cannot radiate) of the airbag cover to be impacted first, which undoubtedly increases the risk of the airbag cover cracking and failure from the non-weakened line.

[0004] Based on this, a new automatic folding method for airbags is needed to solve the problem that the airbags are wrinkled and their center positions are offset when the existing automatic folding pre-installed structure is folded. Summary of the invention

[0005] In view of this, an embodiment of the present invention provides an automatic folding method, a folding structure and a folding tool for an airbag, so as to solve the problem that the airbag is wrinkled and its center position is offset when the existing automatic folding pre-installed structure is folded.

[0006] The embodiment of the present invention provides the following technical solutions:

[0007] An embodiment of the present invention provides an automatic folding method for an airbag, comprising:

[0008] Lay the airbag flat and arrange the air inlet of the airbag in coordination with the pre-provided gas generator contour block;

[0009] Using a push rod to pass through the gas generator imitation block and the air inlet of the airbag to push up the upper fabric sheet of the airbag;

[0010] Gathering the airbag from the edge toward the gas generator contour block to form a gathered structure;

[0011] Pulling the push rod out of the gathering structure, so that the lifted portion of the upper fabric sheet of the airbag falls freely onto the gathering structure;

[0012] The lifted portion of the upper cloth sheet freely falling onto the gathering structure and the gathering structure are pushed and formed.

[0013] Further, after the push rod passes through the gas generator imitation block and the air inlet of the airbag to push up the upper fabric sheet of the airbag, a receiving space is formed between the upper fabric sheet of the airbag and the lower fabric sheet of the airbag;

[0014] The push block is used to gather the airbag from the edge toward the gas generator contour block, and the outer portion of the airbag is pushed into the accommodating space to form the gathering structure, and the surrounding area of ​​the raised portion of the upper cloth piece forms the upper surface of the gathering structure.

[0015] Furthermore, the height of the gathering structure is greater than the height of the gas generator shaped block, so that part of the airbag is gathered at the top of the gas generator shaped block.

[0016] Furthermore, after the gathering structure is formed, the height of the upper surface of the gathering structure is smaller than the height of the top end surface of the push rod, so that the surrounding area of ​​the lifted portion of the upper cloth piece forms the upper surface of the gathering structure.

[0017] Furthermore, the raised portion of the upper fabric sheet freely falling onto the gathering structure and the gathering structure are thermoformed.

[0018] An embodiment of the present invention further provides an airbag folding structure, comprising a folding structure obtained according to any of the above-mentioned automatic folding methods, wherein an upper cloth sheet of the airbag forming the folding structure is at least partially arranged flatly on the folding structure.

[0019] The embodiment of the present invention further provides an automatic folding tool for an airbag, which is used to implement any of the automatic folding methods described above, wherein the automatic folding tool comprises a tool plane, a plurality of push blocks, a lower push block, a gas generator profiling block, a push rod, a lower pressing portion and a lower pressing block;

[0020] A middle hole is provided on the tooling plane, the plurality of push blocks are arranged on the tooling plane along the circumference of the middle hole, the lower top block is movably installed in the middle hole, the gas generator profiling block is installed on the top of the lower top block, the top of the push rod can at least be telescopic or move up and down in the through hole opened on the gas generator profiling block, the pressing part is movably arranged above the middle hole and can enter the middle hole downward, and the pressing block is movably arranged in the pressing hole opened on the pressing part;

[0021] The automatic folding tool is configured as follows:

[0022] When the airbag is laid flat between the plurality of push blocks and the air inlet of the airbag is matched with the gas generator imitation block, the top end of the push rod extends or moves upward to lift up the upper cloth sheet of the airbag and enter the lower pressure hole;

[0023] The plurality of push blocks push the surrounding portion of the airbag toward the gas generator contour block to form the gathered structure;

[0024] The top end of the push rod is retracted or moved downward to be withdrawn from the gathering structure, and the lower pressing block is pressed downward to press the raised portion of the upper cloth sheet down to the upper surface of the gathering structure;

[0025] The pressing portion drives the pressing block to press downward to push the gathering structure into the middle hole to form a folding structure;

[0026] The lower top block moves upward to push out the folding structure.

[0027] Further, the plurality of push blocks include two long push blocks and two short push blocks;

[0028] The two long push blocks are arranged opposite to each other, and the two short push blocks are arranged opposite to each other between the two long push blocks and located at two ends of the long push blocks;

[0029] Wherein, when the two long push blocks move relative to each other, the two long push blocks can move and squeeze to the two sides of the two short push blocks.

[0030] Further, when the pressing portion does not push the gathering structure, the heights of the two long pushing blocks and the two short pushing blocks are both less than or equal to the distance between the pressing portion and the tooling plane.

[0031] Furthermore, the ejector rod is movably disposed up and down in through holes provided on the lower ejector block and the gas generator contour block.

[0032] Compared with the prior art, the at least one technical solution adopted in the embodiment of the present invention can achieve the following beneficial effects:

[0033] The present invention discloses an automatic folding method for an airbag, which comprises laying the airbag flat and arranging the air inlet of the airbag in cooperation with a pre-provided gas generator profiling block; using a push rod to pass through the gas generator profiling block and the air inlet of the airbag to lift up the upper cloth sheet of the airbag; gathering the airbag from the edge to the gas generator profiling block to form a gathering structure; pulling out the push rod from the gathering structure so that the lifted portion of the upper cloth sheet of the airbag falls freely onto the gathering structure; pushing and pressing the lifted portion of the upper cloth sheet that falls freely onto the gathering structure and the gathering structure to achieve the lifting portion of the upper cloth sheet of the airbag falling onto the upper end surface of the gathering structure, and finally, after the upper cloth sheet of the airbag is unfolded, the upper cloth sheet first impacts the weakened line portion of the airbag cover to avoid the non-weakened line area of ​​the airbag cover being opened, thereby solving the problem that the airbag is wrinkled and its center position is offset when the existing automatic folding pre-installed structure is folded;

[0034] Furthermore, the folding structure formed by the automatic folding method of the present invention allows the center position of the airbag fabric to always remain above the gas generator contour block, so that the center position of the upper fabric of the airbag can correspond to the weakened line area of ​​the airbag cover when installed on the car. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 This is a state diagram of the airbag being laid flat on the surface of the tooling in an embodiment of the present invention;

[0037] Figure 2 A state diagram of the upper cloth sheet of the airbag after the push rod is lifted up in the embodiment of the present invention;

[0038] Figure 3 This is a state diagram of the push block in the embodiment of the present invention pushing the airbag toward the middle to form a gathering structure;

[0039] Figure 4 A state diagram of the push rod being pulled out from the gathering structure in the embodiment of the present invention;

[0040] Figure 5 This is a state diagram of the lower pressing block pressing down the upper cloth sheet of the airbag in an embodiment of the present invention;

[0041] Figure 6 A state diagram of the gathering structure being pressed into the middle hole by the pressing part in the embodiment of the present invention;

[0042] Figure 7This is a state diagram of the lower ejector block in the embodiment of the present invention ejecting the folded airbag structure formed by push upwards;

[0043] Figure 8 The folded airbag structure in the embodiment of the present invention.

[0044] The accompanying drawings of the present invention are as follows:

[0045] 10. Tooling plane; 11. Middle hole; 20. Push block; 21. Long push block; 22. Short push block; 30. Lower push block; 40. Gas generator profiling block; 50. Push rod; 60. Lower pressing part; 61. Lower pressing hole; 70. Lower pressing block; DETAILED DESCRIPTION

[0046] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0047] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0048] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0049] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0050] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

[0051] When the existing airbag is automatically folded, the airbag is usually pushed from the edge to the gas generator contour block. Since the upper fabric sheet of the airbag is not subject to any restriction or support, wrinkles are formed on the upper fabric sheet of the airbag when it is pushed. In particular, after the airbag is pushed to form a gathered structure, the top surface of the gathered structure has extrusion wrinkles, so that part of the upper fabric sheet of the airbag is squeezed into the gathered structure, resulting in the airbag being unable to directly or accurately impact the weakened line portion on the airbag cover when it is inflated and deployed, thereby causing the airbag cover to crack and fail at the non-weakened line.

[0052] Based on this, this specification embodiment proposes a processing solution: Figures 1 to 8 As shown, an automatic folding method of an airbag of the present invention, during the automatic folding and gathering of the airbag, a push rod is used to pass through a gas generator profiling block to lift up the upper fabric sheet of the airbag, and then the airbag is gathered to form a gathering structure, and finally the push rod is pulled out from the gathering structure, so that the upper fabric sheet of the airbag freely falls to the top of the gathering structure and is pushed into shape, so that the upper fabric sheet of the airbag is located on the top surface of the airbag folding structure, so that the airbag folding structure can directly impact the airbag cover when it is unfolded, thereby solving the problem in the prior art that the non-weakened line portion of the airbag cover will be impacted first when the automatic folding pre-installed structure is inflated and unfolded.

[0053] The technical solutions provided by various embodiments of the present application are described below in conjunction with the accompanying drawings.

[0054] Example 1

[0055] like Figures 1 to 8 As shown, Figures 1 to 8 The following are folding flow charts of the airbag of the present invention in different folding processes. An embodiment of the present invention provides an automatic folding method of the airbag, including:

[0056] Step S102, laying out the airbag, and arranging the air inlet of the airbag in coordination with the pre-provided gas generator shaped block.

[0057] When the airbag is automatically folded, the airbag is first laid flat on the corresponding tooling, and the air inlet of the airbag is arranged in coordination with the gas generator profiling block on the tooling, so that the airbag can be connected to the gas generator after being automatically folded.

[0058] Among them, after the airbag is laid flat, the cloth piece located on the top is the upper cloth piece of the airbag, and the cloth piece located on the bottom is the lower cloth piece of the airbag. At this time, the air inlet of the airbag is arranged on the lower cloth piece of the airbag.

[0059] The gas generator profiling block has the same size and shape as the gas generator, and a through hole is provided on the pre-provided gas generator profiling block.

[0060] Preferably, the through hole is arranged in the middle position of the gas generator contour block.

[0061] More preferably, the through hole is coaxially arranged with the gas generator shaped block.

[0062] After the airbags are laid flat in step S102, it is convenient to push the airbags to form a gathered structure.

[0063] Step S104: Use a push rod to pass through the gas generator imitation block and the air inlet of the airbag to push up the upper fabric sheet of the airbag.

[0064] The push rod can move up and down in the through hole on the gas generator contour block to push up the upper cloth sheet of the airbag.

[0065] The height of the push rod can be flexibly set according to the size of the airbag and the size of the gas generator.

[0066] Specifically, after the push rod passes through the gas generator contour block, an accommodating space is naturally formed between the upper fabric sheet and the lower fabric sheet of the airbag.

[0067] The top end of the push rod is rounded to avoid damage to the upper fabric sheet of the airbag.

[0068] For example, the top end of the push rod is set as a hemispherical structure or the outer edge is set as a planar structure with an arc chamfer.

[0069] The distance between the highest point of the lifted portion of the upper fabric sheet of the airbag and the lower fabric sheet of the airbag is 90 to 100 mm.

[0070] By lifting up the upper fabric sheet of the airbag in step S104, when the edge of the airbag is pushed, it is possible to prevent the lifted portion of the upper fabric sheet of the airbag from being squeezed into the gathering structure.

[0071] Step S106, gather the airbag from the edge toward the gas generator contour block to form a gathered structure.

[0072] After the upper fabric piece of the airbag is lifted up by the push rod, a accommodating space is formed between the upper fabric piece and the lower fabric piece. Therefore, when the airbag is gathered from the edge toward the gas generator contour block, the outer parts of the upper fabric piece and the lower fabric piece of the airbag will be pushed into the accommodating space to form a gathered structure.

[0073] Specifically, the push block can be used to gather the airbag from the edge toward the gas generator contour block, and the outer peripheral portion of the airbag is pushed into the accommodating space to form a gathered structure.

[0074] The outer portion of the airbag is the portion outside the lifted area of ​​the airbag, which can move toward the gas generator contour block and at least partially enter the accommodating space to form a gathering structure when pushed by the push block.

[0075] Furthermore, after the gathering structure is formed, the height of the upper surface of the gathering structure is less than or equal to the height of the top surface of the top rod after the upper cloth piece is lifted up, so that the upper surface of the gathering structure is formed in the surrounding area of ​​the lifted part of the upper cloth piece, thereby preventing the upper cloth piece from being gathered into the gathering structure or forming wrinkles.

[0076] Among them, after the push rod lifts up the upper cloth piece, setting the height of the top end surface of the push rod to be greater than the gathering structure is also beneficial for the edge structure of the airbag to enter the accommodating space formed by the upper cloth piece and the lower cloth piece, thereby making the upper cloth piece corresponding to the gas generator contour block better form the upper surface of the gathering structure.

[0077] Through step S106, the outer area of ​​the airbag is pushed into the accommodating space to form a gathering structure, and the upper cloth piece corresponding to the gas generator shaping block is lifted up, thereby preventing the upper cloth piece corresponding to the gas generator shaping block from being pushed into the gathering structure to form wrinkles or preventing the upper cloth piece corresponding to the gas generator shaping block from being pushed to form wrinkles.

[0078] Step S108, pulling the push rod out from the gathering structure, so that the lifted portion of the upper fabric sheet of the airbag falls freely onto the gathering structure.

[0079] After the push rod is pulled out from the gathering structure, the lifted portion of the upper fabric sheet of the airbag and its surrounding area will freely fall onto the gathering structure due to lack of support, forming the upper surface of the gathering structure. As a result, when the gathering structure is inflated and deployed, the lifted portion of the upper fabric sheet of the airbag will first impact the airbag cover during deployment, causing the airbag cover to tear along the weakened line.

[0080] In some of the embodiments, when the lifted portion of the upper fabric sheet of the airbag falls freely onto the gathering structure, the lifted portion may be flattened or folded to avoid wrinkles when it is subsequently pushed and formed.

[0081] Through step S108, the lifted portion of the upper fabric piece of the airbag falls onto the gathering structure, thereby solving the problem in the prior art that the portion of the upper fabric piece of the airbag corresponding to the gas generator is squeezed into the gathering structure or wrinkled, causing the airbag to first impact the side of the airbag cover (the portion not affected by the weakening line) after the airbag is inflated.

[0082] Step S110, the lifted portion of the upper fabric sheet freely falling onto the gathering structure and the gathering structure are pushed and formed.

[0083] Preferably, the raised portion of the upper fabric sheet freely falling onto the gathering structure and the gathering structure are thermoformed.

[0084] Step S110 is used to perform push-molding or hot-pressing molding on the gathering structure and the raised portion of the upper fabric sheet to form a complete airbag folding structure.

[0085] The embodiment of the present invention lifts up the upper fabric sheet of the airbag and then pushes the airbag from the edge toward the gas generator contour block to form a gathering structure. Since the height of the lifted portion of the upper fabric sheet of the airbag is higher than the height of the pushing block or the height of the gathering structure, the lifted portion of the upper fabric sheet of the airbag is protected from being pushed by the pushing block and will not form wrinkles or be pushed into the gathering structure, thereby solving the problem in the prior art that the upper fabric sheet of the airbag is pushed by the pushing block, causing the upper fabric sheet of the airbag to be pushed into the gathering structure or to be pushed to form wrinkles, resulting in the inability to quickly impact the weakened line area of ​​the airbag cover.

[0086] Furthermore, the height of the gathering structure is greater than the height of the gas generator shaped block, so that part of the airbag is gathered at the top of the gas generator shaped block, and the cross-sectional area of ​​the gathering structure is reduced so that the folded airbag has a certain height and occupies less area.

[0087] Among them, by setting the height of the gathering structure to be greater than the height of the gas generator profiling block, a buffer structure with a certain thickness is formed between the gas generator profiling block and the push-forming structure when the gathering structure is push-formed, so as to prevent the upper cloth piece of the airbag from falling directly onto the gas generator profiling block and being damaged by the gas generator profiling block during the push-forming process.

[0088] Therefore, by setting the height of the gathering structure to be greater than the height of the gas generator contour block, not only the area occupied by the airbag folding structure is reduced, but also the upper fabric sheet can be prevented from being damaged during the pushing process.

[0089] In the present application, the airbag is lifted up and folded, and the formation characteristics are divided into the lifted upper surface of the airbag, the lifted part of the bag fixes the position of the airbag, and the airbag will not be pushed and pulled by the folding during the folding process, causing the airbag to deviate, and the lifted part of the airbag forms the uppermost surface of the airbag module after being pressed down, which is aligned with the tear line of the door cover; the airbag is lifted up and folded to form an airbag distribution with the surrounding parts of the airbag converging to the gas generator as the center; a space is formed between the highest point of the airbag and the flat surface of the airbag, allowing the surrounding parts of the airbag to enter this space.

[0090] In the embodiment of the present application, the airbag is placed in an automatically folding tool, the folding center part of the airbag is first lifted up and then folded in a disorderly manner, so that the folded state is that the panel facing the occupant is at least partially laid on the folded body, and finally hot-pressed into shape. Therefore, when the airbag is deployed, the lifted part of the airbag first contacts the weakened line of the airbag cover, so that the weakest part of the airbag cover is stressed. Since the front panel of the airbag leaves the shell first, it can also drive the rest of the airbag to unfold, which is more conducive to the smooth opening of the airbag cover as designed, ensuring the expected deployment integrity is optimal.

[0091] The center position of the upper fabric sheet of the folding structure airbag formed by the embodiment of the present invention is always located at the upper end surface of the folding structure, which undoubtedly improves the uniformity and consistency of product molding compared to the existing disordered folding method.

[0092] Example 2

[0093] The embodiment of the present application also provides an airbag folding structure, including a folding structure obtained according to the automatic folding method as in Example 1, wherein an upper cloth sheet of the airbag forming the folding structure is at least partially arranged flatly on the folding structure.

[0094] Example 3

[0095] like Figures 1 to 8 As shown, an embodiment of the present invention further provides an automatic folding tool for an airbag, which is used to implement the automatic folding method described in Example 1. The automatic folding tool includes a tool plane 10, multiple push blocks 20, a lower ejector block 30, a gas generator profiling block 40, a push rod 50, a lower pressing portion 60 and a lower pressing block 70; an intermediate hole 11 is provided on the tool plane 10, multiple push blocks 20 are arranged on the tool plane 10 along the circumference of the intermediate hole 11, the lower ejector block 30 is movably installed in the intermediate hole 11, the gas generator profiling block 40 is installed at the top of the lower ejector block 30, the top of the push rod 50 can at least be telescoped or moved up and down in the through hole opened on the gas generator profiling block 40, the lower pressing portion 60 is movably arranged above the intermediate hole 11, and can downwardly enter the intermediate hole 11, and the lower pressing block 70 is movably arranged in the lower pressing hole 61 opened on the lower pressing portion 60.

[0096] Among them, the tooling plane 10 is used to lay the airbag flat; the push block 20 is used to push the airbag to form a gathering structure; the lower top block 30 is used to support and install the gas generator contour block 40 and the gathering structure; the push rod 50 is used to lift the upper cloth piece of the airbag; the lower pressing part 60 is used to move downward to push the gathering structure, and the lower pressing block 70 is used to press down the lifted part of the upper cloth piece.

[0097] Preferably, the ejector rod 50 is movably disposed in through holes formed in the lower ejector block 30 and the gas generator contour block 40 .

[0098] For example, the push rod 50 is controlled by a telescopic device such as a cylinder to move up and down.

[0099] The pressing portion 60 is installed above the middle hole 11 so as to be movable up and down, for example, it is installed above the middle hole 11 through a “┐”-shaped support rod.

[0100] Optionally, the pressing part 60 is controlled to move up and down by an electric push rod or a cylinder.

[0101] The pressing block 70 is controlled by a cylinder or other telescopic structures and moves up and down in the pressing hole 61 .

[0102] The automatic folding tooling is configured as follows: when the airbag is flattened between multiple push blocks 20 and the air inlet of the airbag cooperates with the gas generator profiling block, the top end of the push rod 50 extends or moves upward to lift the upper cloth piece of the airbag and enter the lower pressing hole 61; multiple push blocks 20 push the surrounding part of the airbag toward the gas generator profiling block 40 to form a gathering structure; the top end of the push rod 50 is retracted or moved downward to be pulled out from the gathering structure, and the lower pressing block 70 is pressed downward to press the lifted part of the upper cloth piece down to the upper surface of the gathering structure; the lower pressing part 60 drives the lower pressing block 70 to press downward together to push the gathering structure into the middle hole 11 to form a folding structure; the lower push block 30 moves upward to push the folding structure out.

[0103] Furthermore, the multiple push blocks 20 include two long push blocks 21 and two short push blocks 22; the two long push blocks 21 are arranged opposite to each other, and the two short push blocks 22 are arranged opposite to each other between the two long push blocks 21 and located at both ends of the long push blocks 21; wherein, when the two long push blocks 21 move relative to each other, the two long push blocks 21 can move and squeeze to both sides of the two short push blocks 22.

[0104] Specifically, by using two long push blocks 21 and two push blocks 20 , the surrounding part of the airbag can be completely pushed to form a gathered structure.

[0105] Furthermore, when the pressing portion 60 does not push the gathering structure, the heights of the two long push blocks 21 and the two short push blocks 22 are both less than or equal to the distance between the pressing portion 60 and the tooling plane 10 , so that the gathering structure is gathered to the bottom end of the pressing block 70 .

[0106] The long push block 21 and the short push block 22 can be controlled by using telescopic devices such as cylinders.

[0107] In this specification, the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the product embodiment described later, since it corresponds to the method, the description is relatively simple, and the relevant parts can be referred to the partial description of the system embodiment.

[0108] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An automatic folding method for an airbag, characterized in that: include: Lay the airbag flat and arrange the air inlet of the airbag in coordination with the pre-provided gas generator contour block; Using a push rod to pass through the gas generator imitation block and the air inlet of the airbag to push up the upper fabric sheet of the airbag; Gathering the airbag from the edge toward the gas generator contour block to form a gathered structure; Pulling the push rod out of the gathering structure, so that the lifted portion of the upper fabric sheet of the airbag falls freely onto the gathering structure; The lifted portion of the upper cloth sheet freely falling onto the gathering structure and the gathering structure are pushed and formed.

2. The automatic folding method according to claim 1, characterized in that: After the push rod passes through the gas generator imitation block and the air inlet of the airbag to push up the upper fabric sheet of the airbag, a receiving space is formed between the upper fabric sheet of the airbag and the lower fabric sheet of the airbag; The airbag is gathered from the edge toward the gas generator contour block by a push block, and the outer portion of the airbag is pushed into the accommodating space to form the gathered structure, and the surrounding area of ​​the raised portion of the upper cloth sheet forms the upper surface of the gathered structure.

3. The automatic folding method according to claim 2, characterized in that: The height of the gathering structure is greater than the height of the gas generator shaped block, so that part of the airbag is gathered at the top end of the gas generator shaped block.

4. The automatic folding method according to claim 2, characterized in that: After the gathering structure is formed, the height of the upper surface of the gathering structure is less than the height of the top end surface of the push rod, so that the surrounding area of ​​the lifted portion of the upper cloth sheet forms the upper surface of the gathering structure.

5. The automatic folding method according to any one of claims 1 to 4, characterized in that: The raised portion of the upper fabric sheet freely falling onto the gathering structure and the gathering structure are thermoformed.

6. An airbag folding structure, characterized in that: It comprises a folding structure obtained by the automatic folding method according to any one of claims 1 to 5, wherein an upper cloth sheet of an airbag forming the folding structure is at least partially arranged flatly on the folding structure.

7. An automatic folding tool for an airbag, characterized in that: Used to implement the automatic folding method according to any one of claims 1 to 5, the automatic folding tool comprises a tool plane, a plurality of push blocks, a lower push block, a gas generator profiling block, a push rod, a lower pressing portion and a lower pressing block; A middle hole is provided on the tooling plane, the plurality of push blocks are arranged on the tooling plane along the circumference of the middle hole, the lower top block is movably installed in the middle hole, the gas generator profiling block is installed on the top of the lower top block, the top of the push rod can at least be telescopic or move up and down in the through hole opened on the gas generator profiling block, the pressing part is movably arranged above the middle hole and can enter the middle hole downward, and the pressing block is movably arranged in the pressing hole opened on the pressing part; The automatic folding tool is configured as follows: When the airbag is laid flat between the plurality of push blocks and the air inlet of the airbag is matched with the gas generator imitation block, the top end of the push rod extends or moves upward to lift up the upper cloth sheet of the airbag and enter the lower pressure hole; The plurality of push blocks push the surrounding portion of the airbag toward the gas generator contour block to form the gathered structure; The top end of the push rod is retracted or moved downward to be withdrawn from the gathering structure, and the lower pressing block is pressed downward to press the raised portion of the upper cloth sheet down to the upper surface of the gathering structure; The pressing portion drives the pressing block to press downward to push the gathering structure into the middle hole to form a folding structure; The lower top block moves upward to push out the folding structure.

8. The automatic folding tool according to claim 7, characterized in that: The plurality of push blocks include two long push blocks and two short push blocks; The two long push blocks are arranged opposite to each other, and the two short push blocks are arranged opposite to each other between the two long push blocks and located at two ends of the long push blocks; Wherein, when the two long push blocks move relative to each other, the two long push blocks can move and squeeze to the two sides of the two short push blocks.

9. The automatic folding tool according to claim 8, characterized in that: When the pressing portion does not push the gathering structure, the heights of the two long pushing blocks and the two short pushing blocks are both less than or equal to the distance between the pressing portion and the tooling plane.

10. The automatic folding tool according to claim 7, characterized in that: The ejector rod is movably arranged in through holes provided on the lower ejector block and the gas generator profiling block.

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