CN117508081A - Novel air bag pressure maintaining process method - Google Patents
Novel air bag pressure maintaining process method Download PDFInfo
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- CN117508081A CN117508081A CN202311650610.1A CN202311650610A CN117508081A CN 117508081 A CN117508081 A CN 117508081A CN 202311650610 A CN202311650610 A CN 202311650610A CN 117508081 A CN117508081 A CN 117508081A
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- cloth piece
- main cloth
- air bag
- outer main
- inner main
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- 238000000034 method Methods 0.000 title claims abstract description 49
- 239000004744 fabric Substances 0.000 claims abstract description 260
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 68
- 239000000741 silica gel Substances 0.000 claims abstract description 66
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 66
- 238000000576 coating method Methods 0.000 claims abstract description 21
- 239000011248 coating agent Substances 0.000 claims abstract description 17
- 239000004952 Polyamide Substances 0.000 claims abstract description 15
- 239000000835 fiber Substances 0.000 claims abstract description 15
- 229920002647 polyamide Polymers 0.000 claims abstract description 15
- 239000011527 polyurethane coating Substances 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 5
- 229920001971 elastomer Polymers 0.000 claims description 21
- 238000009958 sewing Methods 0.000 claims description 18
- 239000010985 leather Substances 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 11
- 238000005520 cutting process Methods 0.000 claims description 8
- 238000003856 thermoforming Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000004814 polyurethane Substances 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 238000007711 solidification Methods 0.000 claims description 4
- 230000008023 solidification Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 239000003550 marker Substances 0.000 claims description 2
- 208000027418 Wounds and injury Diseases 0.000 abstract description 5
- 230000006378 damage Effects 0.000 abstract description 5
- 208000014674 injury Diseases 0.000 abstract description 5
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 4
- 238000004043 dyeing Methods 0.000 description 2
- 238000009998 heat setting Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 208000004221 Multiple Trauma Diseases 0.000 description 1
- 208000023637 Multiple injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/235—Inflatable members characterised by their material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/235—Inflatable members characterised by their material
- B60R2021/23504—Inflatable members characterised by their material characterised by material
- B60R2021/23509—Fabric
- B60R2021/23514—Fabric coated fabric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/235—Inflatable members characterised by their material
- B60R2021/23533—Inflatable members characterised by their material characterised by the manufacturing process
- B60R2021/23538—Sewing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/235—Inflatable members characterised by their material
- B60R2021/23571—Inflatable members characterised by their material characterised by connections between panels
Abstract
The invention provides a novel air bag pressure maintaining process method, which comprises the following steps: step one: polyamide fibers are selected as the materials of the inner main cloth piece and the outer main cloth piece of the air bag; step two: coating polyurethane coating on the two sides of the inner main cloth piece and the outer main cloth piece and drying; step three: the mold is designed according to the shape, size and wall thickness of the air bag. According to the invention, the silica gel layer is arranged between the inner main cloth piece and the outer main cloth piece, so that the inner main cloth piece and the outer main cloth piece are bonded through the silica gel, the inner main cloth piece and the outer main cloth piece are sewn together by using the stitching lines, the stitching lines are embedded into the silica gel, and then the pinholes generated during stitching lines are sealed by the silica gel, after the triggering point of the air bag is exploded, the condition of leaking air from the pinholes can not occur, and further the secondary collision injury is reduced, and a strong protection layer can be formed on the surfaces of the inner main cloth piece and the outer main cloth piece through the polyurethane coating, so that the air bag is prevented from being injured by external factors such as environmental pollution, scratch and the like, and the safety and reliability of the air bag are improved.
Description
Technical Field
The invention relates to a process method, in particular to a novel airbag pressure maintaining process method, and belongs to the technical field of safety airbags.
Background
An automotive airbag is an automotive safety protection system. During collision, the air bag can be inflated to protect the passengers before the passengers collide secondarily. Airbags are known as airbag systems as an aid to occupant restraint devices for seat belts. Along with the development of automobile technology, people are increasingly conscious of safety, the diversity of road conditions and the diversity of accidents are increasingly increased, the collision regulations of automobiles are more comprehensive, secondary or multiple injuries of passengers caused by collision in collision are considered at present for reducing the injuries of the passengers caused by collision, and therefore the pressure maintaining effect of the air bags plays an important role in collision.
In the prior art, the airbag sewing mode developed by airbag manufacturers is as follows: the inner main cloth piece and the outer main cloth piece of the air bag are directly sewn by a seam (as shown in figure 2), and the inner main cloth piece 1 and the outer main cloth piece 2 of the air bag are directly sewn by a seam 3;
when the airbag produced by the sewing mode is triggered, the protection of passengers at the moment of collision can be only satisfied, namely, the airbag has certain pressure at the moment of triggering. However, with the progress of the collision or the continued movement of the vehicle, such as rollover and rolling, the air bag in the prior art can be rapidly deflated at the sewn needle hole, so that the air bag does not have the pressure maintaining effect, therefore, during the subsequent collision of the vehicle, the passengers can be subjected to secondary injuries, such as the situation that the heads collide with the seats, the passengers collide with each other, the heads are thrown out of the vehicle and the like, and the pressure maintaining performance of the air bag is very necessary to reduce the injuries of the passengers caused by the secondary collision based on the situations.
Disclosure of Invention
In view of the above, the present invention provides a novel air bag pressure maintaining process method to solve or alleviate the technical problems existing in the prior art, and at least provides a beneficial choice.
The technical scheme of the embodiment of the invention is realized as follows: a novel air bag pressure maintaining process method comprises the following steps:
step one: polyamide fibers are selected as the materials of the inner main cloth piece and the outer main cloth piece of the air bag;
step two: coating polyurethane coating on the two sides of the inner main cloth piece and the outer main cloth piece and drying;
step three: designing a die according to the shape, the size and the wall thickness of the air bag;
step four: the inner main cloth piece and the outer main cloth piece are adsorbed on the die in vacuum through a thermoforming process;
step five: cutting the inner main cloth piece and the outer main cloth piece into required shapes and sizes according to the die, and scribing the two sides of the sewing positions of the inner main cloth piece and the outer main cloth piece;
step six: coating silica gel on the scribing position of the inner main cloth piece, attaching the scribing position of the outer main cloth piece to the silica gel, and bonding the inner main cloth piece and the outer main cloth piece by the silica gel after standing;
step seven: sewing the inner main cloth piece and the outer main cloth piece by using a suture line according to the scribing position, and finishing the manufacture of the pressure maintaining air bag;
step eight: and filling the air bag into an inflation device for inflation, and detecting the pressure maintaining effect.
Further preferably, in the first step, the polyamide fiber cloth selected from the inner main cloth piece and the outer main cloth piece of the air bag is processed by a PVC backing, and the total thickness of the polyamide fiber cloth and the PVC backing is 0.3mm-0.55mm.
Further preferably, in the second step, a direct coating method is adopted to coat polyurethane solution on the surfaces of the inner main cloth piece and the outer main cloth piece, porous leather films are formed on the surfaces of the inner main cloth piece and the outer main cloth piece after wet solidification, a dryer is adopted to dry the leather films, and then the other surfaces of the inner main cloth piece and the outer main cloth piece are coated, wherein the thickness of the porous leather films is 0.05mm-0.1mm.
Further preferably, in the third step, the shape and the size of the air bag are determined according to the model of the automobile, and the wall thickness of the air bag is 0.4mm-0.65mm.
Further preferably, in the fourth step, the heating temperature of the inner main sheet and the outer main sheet is 40-50 ℃ in the thermoforming process, and the inner main sheet and the outer main sheet remain flexible and are adsorbed on the mold after heating.
Further preferably, in the fifth step, the inner main cloth piece and the outer main cloth piece are kept to be adsorbed on the mold, the inner main cloth piece and the outer main cloth piece are directly cut and cut on the mold, the cloth pieces are taken down after cutting is completed, marking lines are marked on the inner main cloth piece and the outer main cloth piece by using a marker pen, and the marking positions are the sewing positions of the inner main cloth piece and the outer main cloth piece.
Further preferably, in the sixth step, the silica gel is filled into the rubber tube, the rubber outlet of the rubber tube is provided with a rubber outlet head, the width of the rubber outlet head is 3mm-3.5mm, the inner main cloth piece is coated, the outer main cloth piece is attached to the silica gel after coating, the outer main cloth piece is slightly pressed, the width of the silica gel extends, the coating position of the silica gel corresponds to the position of the scribing line, and the silica gel is left to stand after attaching and is naturally solidified.
Still preferably, in step seven, the inner main cloth piece and the outer main cloth piece are sewn by using a seam, the seam penetrates through silica gel between the inner main cloth piece and the outer main cloth piece, the seam position corresponds to the scribing position, and after the pressure maintaining air bag is manufactured, whether the appearance of the pressure maintaining air bag is complete or not and whether the pressure maintaining air bag is damaged or not is checked.
Further preferably, in the eighth step, a dedicated inflator is used to inflate the airbag, the airbag is inflated, the inflation pressure and inflation speed are adjusted according to the design requirements of the airbag, and the pressure maintaining effect of the airbag is detected.
Further preferably, the pressure maintaining air bag comprises an inner main cloth piece, an outer main cloth piece, a suture and silica gel;
the silica gel is located between the inner main cloth piece and the outer main cloth piece, the inner main cloth piece and the outer main cloth piece are bonded through the silica gel, the inner main cloth piece and the outer main cloth piece are stitched through stitching, and stitching is embedded in the silica gel.
By adopting the technical scheme, the embodiment of the invention has the following advantages: according to the invention, the silica gel layer is arranged between the inner main cloth piece and the outer main cloth piece, so that the inner main cloth piece and the outer main cloth piece are adhered through the silica gel, after the silica gel is solidified, the inner main cloth piece and the outer main cloth piece are sewn together by using the stitching line, so that the stitching line is embedded into the silica gel, and then the needle hole generated during stitching line is sealed by the silica gel, after the airbag is triggered to be exploded, the condition of venting from the needle hole can not occur, and further the generation of secondary collision injury is reduced, and a strong protection layer can be formed on the surfaces of the inner main cloth piece and the outer main cloth piece through the polyurethane coating, so that the airbag is prevented from being damaged by external factors such as environmental pollution and scratch, and the safety and reliability of the airbag are improved.
The foregoing summary is for the purpose of the specification only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become apparent by reference to the drawings and the following detailed description.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of the steps of the air bag pressure maintaining process method of the present invention;
FIG. 2 is a sewing pattern diagram of an airbag according to the prior art;
FIG. 3 is a schematic view of the pressure maintaining air bag structure of the present invention;
FIG. 4 is a pressure maintaining graph of an air bag of 200ms in the prior art;
FIG. 5 is a pressure maintaining graph of the pressure maintaining airbag 200ms according to the present invention.
Reference numerals: 1. an inner main cloth piece; 2. an outer main cloth piece; 3. a suture; 4. silica gel;
Detailed Description
Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1
As shown in fig. 1-5, the embodiment of the invention provides a novel air bag pressure maintaining process method, which comprises the following steps:
step one: polyamide fibers are selected as the materials of the inner main cloth piece and the outer main cloth piece of the air bag;
step two: coating polyurethane coating on the two sides of the inner main cloth piece and the outer main cloth piece and drying;
step three: designing a die according to the shape, the size and the wall thickness of the air bag;
step four: the inner main cloth piece and the outer main cloth piece are adsorbed on the die in vacuum through a thermoforming process;
step five: cutting the inner main cloth piece and the outer main cloth piece into required shapes and sizes according to the die, and scribing the two sides of the sewing positions of the inner main cloth piece and the outer main cloth piece;
step six: coating silica gel on the scribing position of the inner main cloth piece, attaching the scribing position of the outer main cloth piece to the silica gel, and bonding the inner main cloth piece and the outer main cloth piece by the silica gel after standing;
step seven: sewing the inner main cloth piece and the outer main cloth piece by using a suture line according to the scribing position, and finishing the manufacture of the pressure maintaining air bag;
step eight: and filling the air bag into an inflation device for inflation, and detecting the pressure maintaining effect.
In one embodiment, in the first step, the polyamide fiber cloth selected from the inner main cloth piece and the outer main cloth piece of the air bag is processed by adopting a PVC backing, the total thickness of the polyamide fiber cloth and the PVC backing is 0.3mm, and the polyamide fiber cloth has the characteristics of light weight, excellent crease resistance, good air permeability, good durability, dyeing property, heat setting and the like, and can be further used for the inner main cloth piece and the outer main cloth piece of the air bag.
In the second step, the polyurethane solution is coated on the surfaces of the inner main cloth piece and the outer main cloth piece by adopting a direct coating method, porous leather films are formed on the surfaces of the inner main cloth piece and the outer main cloth piece after wet solidification, the leather films are dried by adopting a dryer, the other surfaces of the inner main cloth piece and the outer main cloth piece are coated, the thickness of the porous leather films is 0.05mm, a strong protective layer can be formed on the surfaces of the inner main cloth piece and the outer main cloth piece through the polyurethane coating, the air bag is prevented from being damaged by external factors such as environmental pollution, scratch and the like, and the safety and the reliability of the air bag are improved.
In one embodiment, in the third step, the shape and the size of the air bag are determined according to the model of the automobile, the wall thickness of the air bag is 0.4mm, the heating temperature of the inner main cloth piece and the outer main cloth piece is 40 ℃ in the thermoforming process, the inner main cloth piece and the outer main cloth piece keep flexible and are adsorbed on a die after being heated, and the shaping of the inner main cloth piece and the outer main cloth piece can be realized through the die so as to cut the inner main cloth piece and the outer main cloth piece.
In one embodiment, in the fifth step, the inner main cloth piece and the outer main cloth piece are kept to be adsorbed on the mold, the inner main cloth piece and the outer main cloth piece are directly cut and cut on the mold, the cloth pieces are taken down after cutting is completed, mark marks are marked on the inner main cloth piece and the outer main cloth piece by using a marking pen, and the marking positions are the sewing positions of the inner main cloth piece and the outer main cloth piece.
In a sixth embodiment, in the step, the silica gel is filled into the rubber tube, the rubber outlet of the rubber tube is provided with the rubber outlet head, the width of the rubber outlet head is 3mm, the inner main cloth piece is coated firstly, the outer main cloth piece is adhered to the silica gel quickly after coating, the outer main cloth piece is slightly pressed, the width of the silica gel extends, the coating position of the silica gel corresponds to the position of scribing, the silica gel is kept still after adhering, the silica gel is naturally solidified, the inner main cloth piece and the outer main cloth piece are sewed by adopting the suture, the suture penetrates through the silica gel between the inner main cloth piece and the outer main cloth piece, the suture position corresponds to the scribing position, whether the appearance of the pressure maintaining air bag is complete or not is checked after the manufacture of the pressure maintaining air bag is finished, the tightness of the air bag can be enhanced by adding the silica gel layer between the inner main cloth piece and the outer main cloth piece, and when the air bag is inflated, and gas can not leak from a pinhole.
In an embodiment, in the eighth step, a dedicated inflator is used to inflate the airbag, so that the airbag is inflated, the pressure and speed of inflation are adjusted according to the design requirement of the airbag, the pressure maintaining effect of the airbag is detected, and the pressure maintaining effect of the airbag can be obtained by performing inflation pressure maintaining detection on the airbag
In one embodiment, the pressure maintaining air bag comprises an inner main cloth piece 1, an outer main cloth piece 2, a suture 3 and silica gel 4;
the silica gel 4 is located between the inner main cloth piece 11 and the outer main cloth piece 2, the inner main cloth piece 11 and the outer main cloth piece 2 are adhered through the silica gel 4, the inner main cloth piece 11 and the outer main cloth piece 2 are stitched through the stitching thread 3, and the stitching thread 3 is embedded in the silica gel 4.
Example two
As shown in fig. 1-5, the embodiment of the invention provides a novel air bag pressure maintaining process method, which comprises the following steps:
step one: polyamide fibers are selected as the materials of the inner main cloth piece and the outer main cloth piece of the air bag;
step two: coating polyurethane coating on the two sides of the inner main cloth piece and the outer main cloth piece and drying;
step three: designing a die according to the shape, the size and the wall thickness of the air bag;
step four: the inner main cloth piece and the outer main cloth piece are adsorbed on the die in vacuum through a thermoforming process;
step five: cutting the inner main cloth piece and the outer main cloth piece into required shapes and sizes according to the die, and scribing the two sides of the sewing positions of the inner main cloth piece and the outer main cloth piece;
step six: coating silica gel on the scribing position of the inner main cloth piece, attaching the scribing position of the outer main cloth piece to the silica gel, and bonding the inner main cloth piece and the outer main cloth piece by the silica gel after standing;
step seven: sewing the inner main cloth piece and the outer main cloth piece by using a suture line according to the scribing position, and finishing the manufacture of the pressure maintaining air bag;
step eight: and filling the air bag into an inflation device for inflation, and detecting the pressure maintaining effect.
In one embodiment, in the first step, the polyamide fiber cloth selected from the inner main cloth piece and the outer main cloth piece of the air bag is processed by adopting a PVC backing, the total thickness of the polyamide fiber cloth and the PVC backing is 0.55mm, and the polyamide fiber cloth has the characteristics of light weight, excellent crease resistance, good air permeability, good durability, dyeing property, heat setting and the like, and can be further used for the inner main cloth piece and the outer main cloth piece of the air bag.
In the second step, the polyurethane solution is coated on the surfaces of the inner main cloth piece and the outer main cloth piece by adopting a direct coating method, porous leather films are formed on the surfaces of the inner main cloth piece and the outer main cloth piece after wet solidification, the leather films are dried by adopting a dryer, the other surfaces of the inner main cloth piece and the outer main cloth piece are coated, the thickness of the porous leather films is 0.1mm, a strong protective layer can be formed on the surfaces of the inner main cloth piece and the outer main cloth piece through the polyurethane coating, the air bag is prevented from being damaged by external factors such as environmental pollution, scratch and the like, and the safety and the reliability of the air bag are improved.
In one embodiment, in the third step, the shape and the size of the air bag are determined according to the model of the automobile, the wall thickness of the air bag is 0.65mm, the heating temperature of the inner main cloth piece and the outer main cloth piece is 50 ℃ in the thermoforming process, the inner main cloth piece and the outer main cloth piece keep flexible and are adsorbed on a die after being heated, and the shaping of the inner main cloth piece and the outer main cloth piece can be realized through the die so as to cut the inner main cloth piece and the outer main cloth piece.
In one embodiment, in the fifth step, the inner main cloth piece and the outer main cloth piece are kept to be adsorbed on the mold, the inner main cloth piece and the outer main cloth piece are directly cut and cut on the mold, the cloth pieces are taken down after cutting is completed, mark marks are marked on the inner main cloth piece and the outer main cloth piece by using a marking pen, and the marking positions are the sewing positions of the inner main cloth piece and the outer main cloth piece.
In one embodiment, in step six, silica gel is filled into the rubber tube, a rubber outlet of the rubber tube is provided with a rubber outlet head, the width of the rubber outlet head is 3.5mm, the inner main cloth piece is coated firstly, the outer main cloth piece is rapidly attached to the silica gel after coating, the outer main cloth piece is slightly pressed, the width of the silica gel extends, the coating position of the silica gel corresponds to the position of scribing, the silica gel stands after attaching, the silica gel is naturally solidified, the inner main cloth piece and the outer main cloth piece are sewed by adopting a sewing thread, the sewing thread penetrates through the silica gel between the inner main cloth piece and the outer main cloth piece, the position of the sewing thread corresponds to the position of scribing, whether the appearance of the pressure maintaining air bag is complete or not is checked, whether the breakage exists or not is detected after the pressure maintaining air bag is manufactured, the tightness of the air bag can be enhanced by adding the silica gel layer between the inner main cloth piece and the outer main cloth piece, and when the air bag is inflated, gas can not leak from a pinhole.
In an embodiment, in the eighth step, a dedicated inflator is used to inflate the airbag, so that the airbag is inflated, the inflation pressure and inflation speed are adjusted according to the design requirement of the airbag, the pressure maintaining effect of the airbag is detected, and the pressure maintaining effect of the airbag can be obtained by performing inflation pressure maintaining detection on the airbag.
In one embodiment, the pressure maintaining air bag comprises an inner main cloth piece 1, an outer main cloth piece 2, a suture 3 and silica gel 4;
the silica gel 4 is located between the inner main cloth piece 11 and the outer main cloth piece 2, the inner main cloth piece 11 and the outer main cloth piece 2 are adhered through the silica gel 4, the inner main cloth piece 11 and the outer main cloth piece 2 are stitched through the stitching thread 3, and the stitching thread 3 is embedded in the silica gel 4.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that various changes and substitutions are possible within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The novel air bag pressure maintaining process method is characterized by comprising the following steps of:
step one: polyamide fibers are selected as the materials of the inner main cloth piece and the outer main cloth piece of the air bag;
step two: coating polyurethane coating on the two sides of the inner main cloth piece and the outer main cloth piece and drying;
step three: designing a die according to the shape, the size and the wall thickness of the air bag;
step four: the inner main cloth piece and the outer main cloth piece are adsorbed on the die in vacuum through a thermoforming process;
step five: cutting the inner main cloth piece and the outer main cloth piece into required shapes and sizes according to the die, and scribing the two sides of the sewing positions of the inner main cloth piece and the outer main cloth piece;
step six: coating silica gel on the scribing position of the inner main cloth piece, attaching the scribing position of the outer main cloth piece to the silica gel, and bonding the inner main cloth piece and the outer main cloth piece by the silica gel after standing;
step seven: sewing the inner main cloth piece and the outer main cloth piece by using a suture line according to the scribing position, and finishing the manufacture of the pressure maintaining air bag;
step eight: the air bag is arranged in the inflation equipment for inflation detection.
2. The novel air bag pressure maintaining process method according to claim 1, wherein the method comprises the following steps of: in the first step, the polyamide fiber cloth selected from the inner main cloth piece and the outer main cloth piece of the air bag is processed by adopting a PVC support, and the total thickness of the polyamide fiber cloth and the PVC support is 0.3mm-0.55mm.
3. The novel air bag pressure maintaining process method according to claim 1, wherein the method comprises the following steps of: in the second step, a direct coating method is adopted to coat polyurethane solution on the surfaces of the inner main cloth piece and the outer main cloth piece, porous leather films are formed on the surfaces of the inner main cloth piece and the outer main cloth piece after wet solidification, a dryer is adopted to dry the leather films, and then the other surfaces of the inner main cloth piece and the outer main cloth piece are coated, wherein the thickness of the porous leather films is 0.05mm-0.1mm.
4. The novel air bag pressure maintaining process method according to claim 1, wherein the method comprises the following steps of: in the third step, the shape and the size of the air bag are determined according to the model of the automobile, and the wall thickness of the air bag is 0.4mm-0.65mm.
5. The novel air bag pressure maintaining process method according to claim 1, wherein the method comprises the following steps of: in the fourth step, in the thermoforming process, the heating temperature of the inner main cloth piece and the outer main cloth piece is 40-50 ℃, and the inner main cloth piece and the outer main cloth piece keep flexible and are adsorbed on the die after being heated.
6. The novel air bag pressure maintaining process method according to claim 1, wherein the method comprises the following steps of: in the fifth step, the inner main cloth piece and the outer main cloth piece are kept to be adsorbed on the die, the inner main cloth piece and the outer main cloth piece are directly cut and cut on the die, the cloth pieces are taken down after cutting is completed, marking lines are marked on the inner main cloth piece and the outer main cloth piece by using a marker pen, and the marking positions are the sewing positions of the inner main cloth piece and the outer main cloth piece.
7. The novel air bag pressure maintaining process method according to claim 1, wherein the method comprises the following steps of: in the sixth step, the silica gel is filled into the rubber tube, a rubber outlet of the rubber tube is provided with a rubber outlet head, the width of the rubber outlet head is 3mm-3.5mm, the rubber outlet head is coated on an inner main cloth piece, the outer main cloth piece is quickly attached to the silica gel after coating, the outer main cloth piece is slightly pressed, the width of the silica gel extends, the coating position of the silica gel corresponds to the position of a scribing line, and the silica gel is left to stand after attaching and naturally solidifies.
8. The novel air bag pressure maintaining process method according to claim 1, wherein the method comprises the following steps of: in the seventh step, the inner main cloth piece and the outer main cloth piece are sewn by adopting a suture, the suture penetrates through silica gel between the inner main cloth piece and the outer main cloth piece, the suture position corresponds to the scribing position, and whether the appearance of the pressure maintaining air bag is complete or not and whether the pressure maintaining air bag is damaged or not is checked after the pressure maintaining air bag is manufactured.
9. The novel air bag pressure maintaining process method according to claim 1, wherein the method comprises the following steps of: in the eighth step, a special inflator is used for inflating the airbag, so that the airbag is inflated, the inflation pressure and speed are adjusted according to the design requirement of the airbag, and the pressure maintaining effect of the airbag is detected.
10. The novel air bag pressure maintaining process method according to claim 1, wherein the method comprises the following steps of: the pressure maintaining air bag comprises an inner main cloth piece (1), an outer main cloth piece (2), a suture (3) and silica gel (4);
the silica gel (4) is located between the inner main cloth piece (11) and the outer main cloth piece (2), the inner main cloth piece (11) and the outer main cloth piece (2) are bonded through the silica gel (4), the inner main cloth piece (11) and the outer main cloth piece (2) are stitched through the stitching line (3), and the stitching line (3) is embedded in the silica gel (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311650610.1A CN117508081A (en) | 2023-12-05 | 2023-12-05 | Novel air bag pressure maintaining process method |
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| Application Number | Priority Date | Filing Date | Title |
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