Air bag and preparation method thereof

Abstract

The invention provides an air bag and a preparation method thereof.The air bag comprises a rubber air bag outer sleeve, the rubber air bag outer sleeve comprises two basic rubber layers, the peripheral edges of the two basic rubber layers are in vulcanization connection, an air cavity is formed between the two basic rubber layers, and rubber thickening layers are arranged on the inner sides of the vulcanization connection edges of the two basic rubber layers correspondingly; the rubber air bag is sleeved with an air inlet pipe, the air inlet pipe is communicated with the air cavity through the anti-blocking cavity, protection rubber I is arranged outside the air inlet pipe, and the protection rubber I is in vulcanization connection with the basic rubber layer and the rubber thickening layer through transition rubber I; the anti-blocking cavity is positioned at the transition rubber I; the rubber layer serves as the air bag jacket, the strength of the air bag body is higher, and the rubber thickening layers are arranged on the two basic rubber layers on the inner side of the edge of the rubber air bag jacket respectively, so that the air bag is higher in strength and can bear a worse use environment.

Description

Technical Field

[0001] The present invention relates to an airbag for transportation, and particularly to an airbag and a preparation method thereof. Background Art

[0002] In current land, marine and air transportation, goods may shake or move due to various factors, resulting in collisions and damage to the goods. Current logistics transportation protection devices include improvements to the cargo box, shock pads and protective airbag bags, etc. The improvement of the cargo box has good effects but is too costly and the process is complex. The shock absorption effect of the shock pad is not good, the protection effect is poor, and it takes up a large space and is not suitable for storage. The existing airbag bags are designed in a relatively traditional way, with right-angled designs on all sides. After inflation, stress concentration is likely to cause damage. In addition, the outer layer material of the airbag has low strength, the design at the air valve is unreasonable, and it is easily damaged during use, increasing the cost. Summary of the Invention

[0003] To solve the above problems, the present invention provides an airbag and a preparation method thereof. Using a rubber layer as the airbag outer cover, the strength of the airbag body is higher. Moreover, rubber thickening layers are respectively provided on the two basic rubber layers on the inner side of the edge of the rubber airbag outer cover, and the airbag has higher strength and can withstand more severe use environments.

[0004] The technical solution of the present invention is: an airbag, including a rubber airbag outer cover, the rubber airbag outer cover includes two basic rubber layers, the four edges of the two basic rubber layers are vulcanized and connected, an air chamber is formed between the two basic rubber layers, rubber thickening layers are respectively provided on the inner sides of the vulcanized connection edges of the two basic rubber layers, the rubber airbag outer cover is provided with an air inlet pipe, the air inlet pipe is communicated with the air chamber through an anti-blocking cavity, a protective rubber I is provided outside the air inlet pipe, and the protective rubber I is vulcanized and connected to the basic rubber layer and the rubber thickening layer through a transition rubber I; the anti-blocking cavity is located at the transition rubber I.

[0005] The anti-blocking cavity is in the shape of an oblique cone, and the circular bottom surface of the oblique cone is connected to the air inlet pipe; the shortest line segment from the edge of the bottom surface of the oblique cone to the vertex is perpendicular to the circular bottom surface of the oblique cone.

[0006] The airbag is provided with a handle, the handle is vulcanized and connected to the two basic rubber layers through a patch rubber, the handle and the patch rubber are stitched through a sewing thread, and the patch rubber is located between the vulcanized connection edges of the two basic rubber layers; an RFID electronic tag is provided between the vulcanized connection edges of the two basic rubber layers; the width dimension of the vulcanized connection edge of the basic rubber layer is the distance from the edge of the basic rubber layer to the rubber thickening layer, which is 40 - 60 mm.

[0007] A pressure monitoring device for monitoring the pressure of the air chamber is provided inside the rubber airbag jacket, and the detection end of the pressure monitoring device is communicated with the air chamber; a protective rubber II is provided outside the pressure monitoring device, and the pressure monitoring device is bonded to the protective rubber II. The protective rubber II is vulcanized and connected to the base rubber layer and the rubber thickening layer through the transition rubber II; or the pressure monitoring device is located on the side of the air inlet pipe, and the pressure monitoring device is bonded to the protective rubber I.

[0008] A protective shell is provided outside the pressure monitoring device. The protective shell is a temperature-resistant and pressure-resistant protective shell. The detection end of the detection end of the pressure monitoring device is located inside the protective shell. An air inlet and outlet is opened on the protective shell. The air inlet and outlet is communicated with the detection end of the pressure monitoring device and the air chamber. A protective rubber II is provided outside the protective shell. The protective shell is bonded to the protective rubber II. The protective rubber II is vulcanized and connected to the base rubber layer and the rubber thickening layer through the transition rubber II; or the pressure monitoring device is located on the side of the air inlet pipe, and the protective shell is bonded to the protective rubber I.

[0009] The rubber airbag jacket is also provided with an adhesive connection layer. The upper part of the protective shell of the pressure monitoring device is vulcanized and connected to the protective rubber II, the protective rubber I or the transition rubber I through the adhesive connection layer, and the protective shell is bonded to the fixed rubber layer.

[0010] The outer periphery of the rubber airbag jacket is rectangular, the four corners of the rectangle are rounded, and the air inlet pipe is located at one of the four corners; the air inlet pipe is a metal air inlet pipe.

[0011] The handle is made of nylon.

[0012] A preparation method of an airbag includes the following steps. (1) According to the shape, size and structure of the airbag, process a vulcanization mold for the airbag formed by molding. (2) Determine the rubber material of the airbag jacket; determine the rubberized cord fabric, which is formed by covering rubber layers on both sides of the dipped canvas; the rubberized cord fabric uses nylon 66 dipped canvas, and the nylon 66 dipped canvas is woven with nylon 66 cord and then dipped; the material of the rubber layer is the rubber material determined for the airbag jacket. (3) Cut the rubberized cord fabric to be used as the patch rubber, the base film for forming the base rubber layer, and the laminated film for forming the rubber thickening layer respectively; then lay an isolation film between the two layers of base films, fold the laminated film and place it between the upper and lower base films, and 40-60 mm away from the edge of the base film. The folding opening of the laminated film faces the middle of the base film. The four edges of the isolation film are located inside the folding opening of the laminated film, and a release agent silicone oil is applied on at least one side of the isolation film; the isolation film is a pe film; the vulcanized connection edge of the base film is 40-60 mm. (4) Heat and plasticize the rubber material determined for the airbag outer casing through an extruder, and extrude a trapezoidal rubber block with an air inlet and a cushion rubber for use as transition rubber through the die of the extruder; the air inlet is used to install an air inlet pipe, and its size is adapted to the air inlet pipe; Place the air inlet pipe in the air inlet of the trapezoidal rubber block, pass the plug at the lower end of the anti-blocking component through the air inlet pipe, the upper end of the anti-blocking component is located at the upper end of the air inlet pipe, the lower end of the anti-blocking component is a plug with an oblique conical shape, and the circular bottom surface of the plug with an oblique conical shape is in close contact with the end of the air inlet pipe; (5) Cut open the sandwich rubber film at one of the corners from the folding place, and cut off the isolation film at this corner for placing the trapezoidal rubber block and the cushion rubber. At the folding and cutting place of the two layers of base rubber films and the sandwich rubber film, place the trapezoidal rubber block outside, then place the cushion rubber for forming transition rubber above or on the side of the plug with an oblique conical shape, place the transition film at the bottom, and apply an isolation agent on the plug with an oblique conical shape; the shortest line segment from the edge to the vertex of the oblique conical bottom surface is perpendicular to the circular bottom surface of the oblique cone, and the shortest line segment is in contact with the transition film; the material of the transition film is rubber-coated cord fabric; (6) Cut out an assembly hole for installing a pressure monitoring device on the trapezoidal rubber block on the side of the air inlet pipe. The pressure monitoring device is externally provided with a temperature-resistant and pressure-resistant protective shell. The detection end of the pressure monitoring device is located inside the protective shell, and the protective shell is provided with air inlets and outlets, and the air inlets and outlets are communicated with the detection end; Apply an adhesive that can be vulcanized with the rubber material determined for the airbag on the upper part of the pressure monitoring device. The pressure monitoring device is bonded to the assembly hole. The position of the air inlets and outlets on the protective shell of the pressure monitoring device is located at the lower end of the protective shell. The lower end of the protective shell is located between the transition film and the cushion rubber. The lower end of the protective shell is located at the place where the transition film is coated with an isolation agent. The lower end of the protective shell is pasted with an isolation film, and an isolation agent is coated on the side of the isolation film away from the protective shell; After vulcanization, the adhesive applied on the upper part of the protective shell forms a bonding agent connection layer that is vulcanized and connected to the trapezoidal rubber block; (7) Fix after vulcanization; start vulcanization, and after vulcanization, demold and cool to obtain the airbag.

[0013] In the step (3), sew the handle and the patch rubber according to the sewing line, and fit the patch rubber between the edges of the two layers of base rubber films vulcanized and connected; Place the RFID electronic tag between the edges of the two layers of base rubber films vulcanized and connected; The vulcanization parameters are 2.3 MPa × 151 °C × 40 min.

[0014] The beneficial effects of the present invention: The present invention provides an airbag and a preparation method thereof. Using a rubber layer as the airbag outer casing, the strength of the airbag body is higher, and rubber thickening layers are respectively provided on the two layers of base rubber layers on the inner side of the edge of the airbag outer casing, so that the strength of the airbag is higher and it can withstand harsher use environments.

[0015] In the preparation method, the melting point of the PE film is low and it melts after vulcanization at 151°C. The base film and the laminated film are vulcanized and connected to form an air chamber, and the airbag can be integrally vulcanized at high temperature to form an airbag, without separately vulcanizing along the edge of the airbag. The preparation method is simpler, the cost is lower, and the efficiency is higher. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the airbag of the present invention.

[0017] Figure 2 It is a schematic sectional view of the edge of the airbag of the present invention and a schematic diagram of the cord distribution.

[0018] Figure 3 It is a schematic structural diagram of the position where the air inlet pipe of the airbag of the present invention is located and a sectional view taken along line A - A1.

[0019] Figure 4 It is a schematic structural diagram of the position where the pressure monitoring device of the airbag of the present invention is located and a sectional view taken along line B - B1.

[0020] Figure 5 It is a schematic structural diagram of the handle of the airbag of the present invention.

[0021] Figure 6 It is a schematic structural diagram of the anti - block component of the airbag of the present invention installed in the air inlet pipe.

[0022] Figure 7 It is a schematic structural diagram of the air inlet pipe of the airbag of the present invention and a schematic diagram of the valve installed on the air inlet pipe.

[0023] Figure 8 It is a schematic diagram of the placement of the air inlet pipe and the anti - block component during the preparation of the airbag of the present invention.

[0024] Figure 9 It is a schematic structural diagram of the protective shell of the present invention.

[0025] Figure 10 It is a schematic diagram of the connection structure of each module in the pressure monitoring device.

[0026] Figure 11 It is a schematic diagram of the structure of the trapezoidal rubber block and the cushion rubber.

[0027] In the figure: 1. Airbag outer cover; 2. Basic rubber layer; 3. Air chamber; 4. Metal air inlet pipe; 5. Handle; 6. Rubber thickening layer; 7. RFID electronic tag; 8. Pressure monitoring device; 9. Patch rubber; 10. Sewing line; 11. Anti-blocking component; 110. Oblique conical plug; 12. Valve; 13. TPMS module; 14. Bluetooth module; 15. Power module; 16. Anti-blocking cavity; 17. Protection rubber I; 18. Transition rubber I; 19. Trapezoidal rubber block; 190. Part of the trapezoidal rubber block with a thicker thickness; 191. Inclined surface part where the thickness of the trapezoidal rubber block gradually thins; 192. Air inlet; 20. Pad rubber; 21. Transition film; 22. Protective shell; 23. Air inlet and outlet; 24. Basic film; 25. Laminated rubber film; 26. Adhesive connection layer. Detailed implementation mode

[0028] The following will clearly and completely describe the technical solution of the present invention in conjunction with the accompanying drawings and specific embodiments. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and cannot be construed as limiting the protection scope of the present invention. Those skilled in the art can make some non-essential improvements and adjustments based on the content of the present invention below. In the present invention, unless otherwise clearly specified and limited, the technical terms used in this application should have the ordinary meaning understood by those skilled in the art of the present invention.

[0029] As Figures 1-11 shown, an airbag includes a rubber airbag outer cover 1. The rubber airbag outer cover 1 includes two layers of basic rubber layers 2. The edges of the two layers of basic rubber layers are vulcanized and connected. An air chamber 3 is formed between the two layers of basic rubber layers. Rubber thickening layers 6 are respectively provided on the inner sides of the edges of the two layers of basic rubber layers 2 where they are vulcanized and connected. The rubber airbag outer cover is provided with an air inlet pipe 4. The air inlet pipe 4 is communicated with the air chamber 3 through an anti-blocking cavity 16. A protection rubber I 17 is provided outside the air inlet pipe. The protection rubber I 17 is vulcanized and connected to the basic rubber layer 2 and the rubber thickening layer 6 through a transition rubber I 18. The anti-blocking cavity 16 is located at the transition rubber I 18.

[0030] During vulcanization, the anti-blocking component blocks one end of the connection between the air inlet pipe and the air chamber to prevent rubber from flowing into the air inlet pipe during the vulcanization of the airbag and causing blockage. After vulcanization, after pulling out the anti-blocking component, an anti-blocking cavity 16 is formed at one end of the connection between the air inlet pipe 4 and the air chamber 3.

[0031] The anti-blocking cavity 16 is in an oblique conical shape, and the circular bottom surface of the oblique cone is connected to the air inlet pipe.

[0032] The width dimension of the edge of the basic rubber layer 2 where it is vulcanized and connected is the distance from the edge of the basic rubber layer 2 to the rubber thickening layer, which is 40 - 60 mm.

[0033] The present invention provides an airbag, which uses a rubber layer as the airbag outer casing. The strength of the airbag body is higher, and rubber thickening layers are provided on each of the two base rubber layers on the inner side of the edge of the rubber airbag outer casing, so that the strength of the airbag is higher and it can withstand more severe usage environments.

[0034] In addition, the air inlet pipe is communicated with the air chamber through an anti-blocking cavity. A protective rubber I is provided outside the air inlet pipe. The protective rubber I is vulcanized and connected to the base rubber layer and the rubber thickening layer through a transition rubber I. The anti-blocking cavity is located at the transition rubber I. The anti-blocking cavity is in the shape of an oblique cone, and the circular bottom surface of the oblique cone is connected to the air inlet pipe. The setting of the protective rubber I enables the protective rubber I to protect the air inlet pipe when the air inlet pipe is under pressure during the vulcanization molding process. Since the protective rubber I is not in the same plane as the base rubber layer and the rubber thickening layer and has different thicknesses, the protective rubber I is transitionally connected to the base rubber layer and the rubber thickening layer through the transition rubber I. Therefore, it is also convenient to directly integrally vulcanize and mold the airbag, or to vulcanize the parts that need to be vulcanized and connected separately to form the structure of the airbag of the present application.

[0035] The shortest line segment between the edge and the vertex of the bottom surface of the oblique cone is perpendicular to the circular bottom surface of the oblique cone.

[0036] The airbag is provided with a handle 5. The handle 5 is vulcanized and connected to the two base rubber layers 1 through a patch rubber 9. The handle 5 and the patch rubber 9 are stitched through a sewing line 10. The patch rubber 9 is located between the vulcanized connection edges of the two base rubber layers 1. An RFID electronic tag 7 is provided between the vulcanized connection edges of the two base rubber layers.

[0037] A pressure monitoring device 8 for monitoring the pressure of the air chamber is provided inside the rubber airbag outer casing. The detection end of the pressure monitoring device 8 is communicated with the air chamber 3. A protective rubber II is provided outside the pressure monitoring device. The pressure monitoring device is bonded to the protective rubber II. The protective rubber II is vulcanized and connected to the base rubber layer and the rubber thickening layer through a transition rubber II. Or the pressure monitoring device is located on the side of the air inlet pipe 4. The pressure monitoring device 8 is located inside the transition rubber I and is bonded to the transition rubber I 18. Or the pressure monitoring device 8 is located inside the protective rubber I and is bonded to the protective rubber I 17. The detection end of the pressure monitoring device 8 is communicated with the air chamber.

[0038] As Figure 9 As shown, a protective shell 22 is provided outside the pressure monitoring device 8. The pressure monitoring device 8 is fixedly installed inside the protective shell 22. The protective shell 22 is a temperature-resistant and pressure-resistant protective shell to prevent damage to the pressure monitoring device 8 during the integral vulcanization molding process. The detection end of the detection end of the pressure monitoring device 8 is located inside the protective shell. An air inlet / outlet 23 is provided on the protective shell 22. The air inlet / outlet 23 is communicated with the detection end of the pressure monitoring device 8, and the air inlet / outlet 23 is communicated with the air chamber 3.

[0039] The material of the temperature and pressure resistant protective shell can be nylon 9T, nylon 6T, PTFE or other materials that meet the vulcanization requirements of this application. Nylon 9T is formed by polycondensation of nonanediamine and terephthalic acid. The melting point of pure PA9T is about 306 °C, and it has good heat resistance. Nylon 6T is formed by polycondensation of hexanediamine and terephthalic acid. PA6T on the market is a copolymer or composite with a lower melting point after copolymerization with other monomers. The average melting point of the PA6T copolymer is 320 °C, and the heat distortion temperature is about 290 °C.

[0040] A protective rubber II is provided outside the protective shell 22. The protective shell 22 is bonded to the protective rubber II, and the protective rubber II is vulcanized and connected to the base rubber layer and the rubber thickening layer through a transition rubber II; or the pressure monitoring device 8 is located on the side of the air inlet pipe 4, and the protective shell 22 is bonded to the protective rubber I.

[0041] During the vulcanization molding process, when the pressure monitoring device is under pressure, the protective rubber I or the protective rubber II can protect it.

[0042] The rubber airbag jacket is also provided with an adhesive connection layer 26. The upper part of the pressure monitoring device is vulcanized and connected to the protective rubber II, the protective rubber I or the transition rubber I through the adhesive connection layer 26, and the protective shell 22 of the pressure monitoring device is bonded to the fixed rubber layer. The adhesive connection layer is formed after vulcanizing and connecting epoxy resin adhesive with the protective rubber II, the protective rubber I or the transition rubber I.

[0043] The outer periphery of the rubber airbag jacket is rectangular, and the four corners of the rectangle are rounded. The air inlet pipe is located at one of the four corners; the air inlet pipe is a metal air inlet pipe, and the metal material can be copper, brass, etc. and other conventional materials.

[0044] The handle 5 is made of nylon.

[0045] The materials of the base rubber layer, the rubber thickening layer, and the patch rubber can be rubberized cord fabric. The middle layer of the rubberized cord fabric is impregnated canvas, and both sides of the impregnated canvas are rubber layers. The rubber materials of the rubber layers on both sides of the impregnated canvas can be vulcanized and crosslinked with the rubber materials of the protective rubber I, the transition rubber I, the protective rubber II, and the transition rubber II, preferably the same rubber material.

[0046] The rubberized cord fabric can be the vulcanized rubberized cord fabric. The protective rubber I, the transition rubber I, the protective rubber II, and the transition rubber II are vulcanized rubbers, and then the airbag of this application is respectively vulcanized at the joints that need to be vulcanized. Alternatively, the rubberized cord fabric is an unvulcanized rubberized cord fabric, and the protective rubber I, the transition rubber I, the protective rubber II, and the transition rubber II are unvulcanized rubbers, and the airbag of this application is integrally vulcanized.

[0047] It can also be that the coated cord fabric is an unvulcanized coated cord fabric, and the protective rubber I, transition rubber I, protective rubber II, and transition rubber II are unvulcanized rubbers. Each layer of the basic rubber layer and its corresponding rubber thickening layer are vulcanized and connected respectively, and then vulcanized at the vulcanization joints as needed to form the airbag of the present application.

[0048] The maximum thickness at the rubber thickening layer 6 can be 8 mm.

[0049] A method for preparing an airbag, comprising the following steps: (1) Processing a vulcanization mold for the airbag formed by molding according to the shape, size and structure of the airbag; for example, a transportation airbag mold structure of 202423040574X can be processed.

[0050] (2) Determining the rubber material of the airbag outer cover; determining the coated cord fabric, which is formed by calendering rubber layers on both sides of the dipped canvas. The coated cord fabric uses nylon 66 dipped canvas, and the nylon 66 dipped canvas is woven with nylon 66 cord and then dipped. In the example of such a preparation method, the rubber material can be IIR butyl rubber; rubber layers are covered on both sides of the dipped canvas, and the material of the rubber layer can be a compounded rubber of IIR butyl rubber.

[0051] (3) Cutting the coated cord fabric to be used as the patch rubber, the basic film 24 for forming the basic rubber layer 1, and the sandwiched rubber film 25 for forming the rubber thickening layer 6 respectively; then laying a release film between the two layers of basic films 24, folding the sandwiched rubber film 25 and placing it between the upper and lower layers of basic films 24, and at a distance of 40 - 60 mm from the edge of the basic film 24. The folding opening of the sandwiched rubber film 25 faces the middle of the basic film 24, (as Figure 2 shown), after vulcanization, the sandwiched rubber film 25 forms the rubber thickening layer 6 of the two layers of basic rubber layers of the airbag respectively. The four peripheral edges of the release film, that is, the PE film, are located within the folding opening of the sandwiched rubber film 25, and a release agent silicone oil is applied to at least one side of the release film. The handle 5 and the patch rubber 9 are sewn together through the sewing line 10, and the patch rubber 9 is attached between the edges of the two layers of basic films 24 at 40 - 60 mm; that is, the patch rubber 9 is located between the vulcanization connection edges of the basic rubber layer 1; The patch rubber 9 is located between the edges of the upper and lower layers of basic films 24 at 40 - 60 mm, so that the handle is vulcanized and connected to the upper and lower layers of basic rubber layers 1 through the patch rubber 9, and the handle is firmly connected to the airbag outer cover.

[0052] (4) Heating and plasticizing the IIR butyl rubber compound through an extruder, and extruding through the die of the extruder respectively to form a trapezoidal rubber block 19 with an air inlet 192 and a cushion rubber 20 for use as transition rubber I or / and transition rubber II. The trapezoidal rubber block 19 forms protective rubber I and a part of transition rubber I, as Figure 11As shown, the trapezoidal rubber block 19 includes a portion 190 with a relatively thick middle trapezoidal rubber block and inclined surface portions 191 on both sides with gradually decreasing thickness. After vulcanization, the portion 190 with a relatively thick trapezoidal rubber block forms the protective rubber I, and the inclined surface portions 191 with gradually decreasing thickness form the transition rubber I; as Figure 8 and Figure 11 shown, an intake pipe 4 is installed at the intake port, and the size of the intake port is adapted to the intake pipe; the intake port is located at the portion 190 with a relatively thick trapezoidal rubber block, so as to facilitate the protection of the installed intake pipe 4 during vulcanization molding.

[0053] As Figure 8 and Figure 6 shown, the intake pipe 4 is placed in the intake port of the trapezoidal rubber block, the lower plug of the anti-blocking component 11 passes through the intake pipe 4, the upper end of the anti-blocking component 11 is located at the upper end of the intake pipe 4, the lower end of the anti-blocking component is a plug 110 with an inclined conical shape, and the circular bottom surface of the plug 110 with an inclined conical shape is in close contact with the end of the intake pipe 4.

[0054] When the base film is rectangular, cut the sandwich film at one of the corners from the folding place, and cut off the release film at this corner for placing the trapezoidal rubber block and the cushion rubber. At the folding and cutting place of the two layers of base film 24 and sandwich film 25, place the trapezoidal rubber block 19 outside, then place the cushion rubber 20 above or on both sides of the plug with an inclined conical shape, place the transition film 21 at the bottom, and apply a release agent on the plug with an inclined conical shape; as Figure 6 and Figure 8 shown, the shortest line segment from the edge to the vertex of the inclined conical bottom surface is perpendicular to the circular bottom surface of the inclined cone, and the shortest line segment is in contact with the transition film 21; the material of the transition film is rubber-coated cord fabric.

[0055] As Figure 8 and Figure 11 shown, the cushion rubber 20 is placed on both sides of the plug with an inclined conical shape. The thickness of the cushion rubber 20 gradually decreases from the end adjacent to the trapezoidal rubber block 19 to the far end. Moreover, at the same distance from the trapezoidal rubber block 19 between the cushion rubber 20 and the plug with an inclined conical shape, the maximum thickness of the cushion rubber 20 is greater than that of the plug with an inclined conical shape. In addition, the cushion rubber 20 starts to gradually decrease in thickness from a distance of 2 cm - 5 cm from the plug with an inclined conical shape to the far end of the plug with an inclined conical shape. Thus, the plug with an inclined conical shape can be protected during vulcanization, and the thickness can be transitioned to the base rubber layer 2 and the rubber thickening layer of the airbag.

[0056] The anti-blocking component is used to prevent rubber from flowing into the air inlet pipe during the vulcanization of the airbag, resulting in blockage. The outer surface of the conical plug is coated with a release agent to facilitate extraction after vulcanization. After vulcanization, after removing the anti-blocking component 11, a conical anti-blocking cavity 16 is formed at the position where the conical plug 110 is located. The size of the anti-blocking component 11 inside the air inlet pipe is in clearance fit with the inner diameter of the metal air inlet pipe. After vulcanization, it is removed, and after vulcanization, the metal air inlet pipe is tightly combined with the trapezoidal rubber block.

[0057] The trapezoidal rubber block 19 can make the air inlet pipe be wrapped by more rubber, be more stable, can withstand greater external forces and has a good sealing effect.

[0058] (6)Place the RFID 7 between 40 mm and 60 mm from the edge of the two layers of base film 24; Cut out an assembly hole for installing the pressure monitoring device 8 on the trapezoidal rubber block 19 on the side of the air inlet pipe, as Figure 9 shown. The outside of the pressure monitoring device is provided with a temperature and pressure resistant protective shell 22. The detection end of the pressure monitoring device is located inside the protective shell 22. The protective shell is provided with air inlet and outlet ports 23, and the air inlet and outlet ports 23 are communicated with the detection end of the pressure monitoring device; Apply epoxy resin adhesive on the upper part of the protective shell 22 and insert it into the assembly hole. The pressure monitoring device 8 is bonded to the assembly hole. The position of the protective shell 22 where the air inlet and outlet ports 23 are opened is the lower end of the protective shell 22. The lower end of the protective shell 22 is located between the transition film 21 and the cushion rubber 20. The lower end of the protective shell 22 is located at the position where the release agent is applied on the transition film 21. An isolation film is pasted on the lower end of the protective shell 22, and a release agent is coated on the side of the isolation film away from the protective shell 22; Finally, after vulcanization, the side of the protective shell with the air inlet and outlet ports 23 faces the air chamber, and the air chamber is communicated with the air inlet and outlet ports 23. Therefore, the detection end of the pressure monitoring device 8 is communicated with the air chamber.

[0059] The epoxy resin adhesive applied on the upper part of the protective shell 22 after vulcanization forms a bonding agent connection layer 26 that is vulcanized and connected to the trapezoidal rubber block 19.

[0060] (7)Fix after vulcanization; Start vulcanization, and the vulcanization parameters are 2.3 MPa × 151 °C × 40 min. After vulcanization is completed, demold and cool to obtain the airbag.

[0061] The above method is an integral vulcanization molding method for the airbag.

[0062] The melting point of the PE film is low and it melts after vulcanization at 151 °C. The base film and the laminated film are vulcanized and connected to form the air chamber 3. It can be integrally vulcanized at high temperature to form the airbag, without the need to vulcanize separately along the edge of the airbag. The preparation method is simpler, the cost is lower, and the efficiency is higher.

[0063] The release agent can be silicone oil.

[0064] The adhesive can be epoxy resin adhesive, which is tightly combined with rubber after vulcanization.

[0065] Both ends of the handle are stitched to the patch rubber 9.

[0066] The handle 5 can be made of nylon, specifically nylon 6. The handle can be cut by hot stamping and placed on the side of the airbag outer cover.

[0067] The RFID electronic tag, encapsulated by rubber and containing a chip, can be any commercially available RFID electronic tag encapsulated by rubber. The RFID electronic tag 7 is placed at a position between 40 mm and 60 mm from the edge between two layers of base films. After being vulcanized and connected to the base films, the RFID electronic tag is embedded between two layers of base rubber layers of the airbag outer cover 1. The basic information of the airbag is written into the RFID electronic tag 7, so that through the RFID electronic tag set on the edge of the airbag, the user can query the basic information of the airbag in real time, which can be used for warehouse in and out management and anti-counterfeiting.

[0068] The RFID electronic tag can be a commercially available ordinary product, encapsulated by rubber and containing a chip, and obtains airbag information through radio frequency. After the electronic tag enters the recognition range of the reader, it receives the radio frequency signal sent by the reader, and sends out the product information stored in the chip by virtue of the energy obtained from the induced current. After the reader reads and decodes the information, it is sent to the central information system for relevant data processing.

[0069] For the finally formed airbag, the side of the protective case of the pressure monitoring device with the air inlet and outlet 23 faces the air chamber.

[0070] Such as Figure 10 , the pressure monitoring device 8 includes a Bluetooth module 14, a TPMS module 13, and a power module 15. The power module 15 is electrically connected to the Bluetooth module 14 and the TPMS module 13 respectively to supply power to the Bluetooth module 14 and the TPMS module 13. The TPMS module 13 is communicatively connected to the Bluetooth module 14. After the airbag is inflated, the TPMS module 13 detects the air pressure and sends it to the Bluetooth module 14. The Bluetooth module 14 sends it to the TBOX through a Bluetooth signal. The TBOX sends the received data to the Alibaba Cloud server through a 4G signal, and the corresponding air pressure and temperature data can be viewed on the web page. When the air pressure drops too much or there is a leak, the system automatically alarms and displays it on the monitor in the form of a pop-up window or a message. The TBOX is installed on a transportation vehicle, such as a ship, a car, a truck, or a train.

[0071] The outside of the pressure monitoring device 8 is provided with a protective case 22. The protective case 22 is a temperature-resistant and pressure-resistant protective case to prevent damage to the pressure monitoring device 8 during the vulcanization process. The detection end of the TPMS module 13 is located inside the protective case. An air inlet and outlet 23 is opened on the protective case 22, and the air inlet and outlet 23 is communicated with the detection end of the TPMS module 13.

[0072] The TPMS module is a function of the existing tire pressure monitoring system, including warnings before tire blowouts, abnormal tire whistles, tire temperature monitoring, tire air leakage monitoring, and tire pressure monitoring, etc. Therefore, through the TPMS system in the airbag, users can view information such as the pressure, temperature, and usage status of the airbag in real time through relevant digital platforms.

[0073] The pressure monitoring device 8 can also be other existing pressure sensors. The detection end of the pressure sensor is located inside the protective shell 22, and an air inlet / outlet 23 is provided on the protective shell. The air inlet / outlet 23 is communicated with the detection end of the pressure sensor. The data is wirelessly transmitted to the TBOX on the transportation vehicle, and the TBOX sends the received data to the cloud server through the 4G signal, and the corresponding air pressure data can be viewed on the web page.

[0074] It is used to monitor the pressure during airbag inflation. The inflation pressure range for the application scenario of the airbag in this application is: 0.4 bar - 0.6 bar.

[0075] The coated fabric includes a three-layer structure. The middle layer is impregnated canvas, which is made of nylon 66 plain weave. Rubber layers are respectively arranged on both sides of the impregnated canvas. The material of the rubber layer is IIR butyl rubber compound. The IIR butyl rubber compound can be the product of Wuxi Ruijieer Rubber and Plastic Products Co., Ltd. or other commercially available compound with good airtightness.

[0076] For the transportation airbag designed in this application, after vulcanization, the melting point of the PE film is low and it melts after vulcanization at 151°C. The laminated film is vulcanized and connected to the base films as the two-layer base rubber layer to form the air chamber 3. Therefore, it can be integrally vulcanized at high temperature, without vulcanizing separately along the edge of the airbag, and the preparation method is more convenient, with lower cost and higher efficiency.

[0077] The outer periphery of the airbag jacket is rectangular, and the four corners of the rectangle are rounded. The inlet pipe is located at one of the four corners.

[0078] Through the design of the rounded corners, the stress borne by the edge of the air chamber after the airbag is inflated is more uniform, effectively avoiding the defect of damage due to stress concentration in the traditional right-angle design.

[0079] The inlet pipe can be a metal inlet pipe.

[0080] The inlet pipe is located at one of the four corners; when the airbag is in use, after the airbag is unfolded and placed in the gap between the goods, the inlet pipe is located above, which is convenient for inflation and deflation.

[0081] Such as Figure 7As shown in the figure, a valve 12 is installed on the intake pipe 4. When the airbag is in use, place the airbag between the goods to be protected, open / loosen the valve 12, and use the supporting inflation device to inflate the air chamber 3 through the intake pipe 4. During the inflation process, the air chamber 3 gradually expands. After inflation is completed, close / tighten the valve 12 to prevent air leakage. After the work is completed, open / loosen the air valve 12. After pressure relief, use the handle 5 to transfer it to the storage place.

[0082] When the airbag of the present application is in use, unfold the airbag and place it in the gap between the goods. The intake pipe is located above. Use the inflation device to inflate through the intake pipe 4. After inflation is completed, the air chamber 3 expands, separating the goods on both sides of the airbag to prevent the goods from colliding. The use of the same kind of rubber vulcanization connection, rubber thickening layer 6 and rounded corner design in the airbag can make the internal stress distribution of the airbag more uniform after inflation, be able to withstand greater impact stress, provide a greater buffering effect, and increase the safety guarantee of goods transportation. After the airbag is used, it is depressurized through the intake pipe. After depressurization is completed, fold the airbag and use the handle 5 to transfer it to the storage place. The airbag can be radio frequency identified through the RFID chip 7 to obtain the relevant technical information of the airbag and conduct comprehensive management and inventory control. The TPMS module 13 real-time monitors parameters such as the air pressure and temperature inside the airbag (it can also only use the pressure monitoring device to monitor the pressure), and transmits the data to the TBOX on the hull. Moreover, if an abnormality is found, the TBOX can actively inform the user in the form of a message or a pop-up window through the display screen / monitor on the hull to avoid risks in advance.

[0083] The above are only the preferred embodiments of the present invention, rather than all the embodiments. The protection scope of the present invention is not limited thereto. The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not conflict, it should be considered as the scope recorded in this specification. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention. It should be noted that for those skilled in the art and any person familiar with the technical field, without departing from the overall concept and the principle spirit of the present invention, according to the technical solution of the present invention and its inventive concept, equivalent substitution or change, and several changes and improvements made should also be regarded as the protection scope of the present invention.

Claims

1. An airbag, characterized in that: It includes a rubber airbag jacket. The rubber airbag jacket includes two layers of basic rubber layers (1). The four peripheral edges of the two layers of basic rubber layers are vulcanized and connected. An air chamber (3) is formed between the two layers of basic rubber layers. Rubber thickening layers (6) are respectively arranged on the inner sides of the vulcanized connection edges of the two layers of basic rubber layers. The rubber airbag jacket is provided with an air inlet pipe (4). The air inlet pipe (4) is communicated with the air chamber (3) through an anti-blocking cavity (16). A protective rubber I (17) is arranged outside the air inlet pipe (4). The protective rubber I (17) is vulcanized and connected to the basic rubber layer (1) and the rubber thickening layer (6) through a transition rubber I (18); the anti-blocking cavity (16) is located at the transition rubber I (18).

2. The airbag according to claim 1, wherein: The anti-blocking cavity is in the shape of an oblique cone, and the circular bottom surface of the oblique cone is connected to the air inlet pipe (4); the shortest line segment from the edge of the bottom surface of the oblique cone to the vertex is perpendicular to the circular bottom surface of the oblique cone.

3. The airbag according to claim 1, characterized in that: The airbag is provided with a handle (5). The handle (5) is vulcanized and connected to the two layers of basic rubber layers (1) through a patch rubber (9). The handle (5) and the patch rubber (9) are stitched through a sewing thread (10). The patch rubber (9) is located between the vulcanized connection edges of the two layers of basic rubber layers; an RFID electronic tag (7) is arranged between the vulcanized connection edges of the two layers of basic rubber layers; the width dimension of the vulcanized connection edge of the basic rubber layer (2) is the distance from the edge of the basic rubber layer (2) to the rubber thickening layer, which is 40 - 60 mm.

4. The airbag according to claim 1, characterized in that: A pressure monitoring device (8) for monitoring the pressure of the air chamber is arranged inside the rubber airbag jacket. The detection end of the pressure monitoring device (8) is communicated with the air chamber (3); a protective rubber II is arranged outside the pressure monitoring device. The pressure monitoring device is bonded to the protective rubber II. The protective rubber II is vulcanized and connected to the basic rubber layer and the rubber thickening layer through a transition rubber II; or the pressure monitoring device (8) is located on the side of the air inlet pipe (4), and the pressure monitoring device (8) is bonded to the protective rubber I.

5. The airbag according to claim 4, characterized in that: A protective shell (22) is arranged outside the pressure monitoring device (8). The protective shell (22) is a temperature-resistant and pressure-resistant protective shell. The detection end of the detection end of the pressure monitoring device (8) is located inside the protective shell. An air inlet and outlet (23) is opened on the protective shell (22). The air inlet and outlet (23) is communicated with the detection end of the pressure monitoring device (8), and the air inlet and outlet (23) is communicated with the air chamber (3); A protective rubber II is arranged outside the protective shell (22). The protective shell (22) is bonded to the protective rubber II. The protective rubber II is vulcanized and connected to the basic rubber layer and the rubber thickening layer through a transition rubber II; or the pressure monitoring device (8) is located on the side of the air inlet pipe (4), and the protective shell (22) is bonded to the protective rubber I.

6. The airbag according to claim 5, wherein: The rubber airbag jacket is further provided with an adhesive connection layer (26). The upper part of the protective shell (22) of the pressure monitoring device is vulcanized and connected to the protective rubber II, the protective rubber I or the transition rubber I through the adhesive connection layer (26). The protective shell (22) is bonded to the fixed rubber layer.

7. The airbag according to claim 5, characterized in that: The outer periphery of the rubber airbag jacket is rectangular, and the four corners of the rectangle are rounded. The air inlet pipe is located at one of the four corners; the air inlet pipe is a metal air inlet pipe.

8. The airbag according to claim 1, characterized in that: The handle (5) is made of nylon.

9. A method for preparing an airbag, characterized in that: (1) Process a vulcanization mold for the airbag by molding it according to the shape, size, and structure of the airbag. (2) Determine the rubber material for the airbag outer casing; determine the rubber-coated cord fabric, which is formed by covering both sides of the dipped canvas with rubber layers; the rubber-coated cord fabric uses nylon 66 dipped canvas, and the nylon 66 dipped canvas is woven with nylon 66 cord and then dipped; the material of the rubber layer is the rubber material determined for the airbag outer casing. (3) Cut the rubber-coated cord fabric to be used as the patch rubber, the base film (24) for forming the base rubber layer (1), and the sandwiched rubber film (25) for forming the rubber thickening layer (6); then place an isolation film between the two layers of base film (24), fold the sandwiched rubber film (25) and place it between the upper and lower base films (24), and at a distance of 40 - 60 mm from the edge of the base film (24). The folding opening of the sandwiched rubber film (25) faces the middle of the base film (24), and the four edges of the isolation film are located within the folding opening of the sandwiched rubber film (25), and release agent silicone oil is applied to at least one side of the isolation film; the isolation film is a pe film; the vulcanization connection edge of the base film (24) is 40 - 60 mm. (4) Heat and plasticize the rubber material determined for the airbag outer casing through an extruder, and extrude through the die of the extruder to form a trapezoidal rubber block (19) with an air inlet (192) and a cushion rubber (20) for use as transition rubber respectively; the air inlet is used to install the air inlet pipe (4) and is sized to fit the air inlet pipe. (5) Place the air inlet pipe (4) into the air inlet of the trapezoidal rubber block, pass the lower plug of the anti-blocking component through the air inlet pipe, with the upper end of the anti-blocking component located at the upper end of the air inlet pipe. The lower end of the anti-blocking component is a plug with an inclined conical shape, and the circular bottom surface of the inclined conical plug is in close contact with the end of the air inlet pipe. (6) Cut open the sandwiched rubber film (25) at one of the corners from the folded part and cut off the isolation film at this corner for placing the trapezoidal rubber block (19) and the cushion rubber (20). At the folded and cut part of the two layers of base film (24) and the sandwiched rubber film (25), place the trapezoidal rubber block outside, then place the cushion rubber (20) for forming transition rubber above or on the side of the inclined conical plug, place the transition film (21) at the bottom, and apply a release agent on the inclined conical plug; the shortest line segment from the edge to the vertex of the inclined conical bottom surface is perpendicular to the circular bottom surface of the inclined cone, and the shortest line segment is in contact with the transition film (21); the material of the transition film (21) is the rubber-coated cord fabric. (7) Cut an assembly hole for installing the pressure monitoring device (8) on the trapezoidal rubber block on the side of the air inlet pipe. The pressure monitoring device (8) is externally provided with a temperature and pressure resistant protective shell (22). The detection end of the pressure monitoring device is located inside the protective shell (22), and air inlet and outlet openings (23) are provided on the protective shell, and the air inlet and outlet openings (23) are communicated with the detection end. Apply an adhesive on the upper part of the pressure monitoring device that can vulcanize with the rubber material determined by the airbag. Bond the pressure monitoring device (8) to the assembly hole. The position of the air inlet and outlet on the pressure monitoring device protective shell (22) is located at the lower end of the protective shell (22). The lower end of the protective shell (22) is located between the transition film (21) and the cushion rubber (20). The lower end of the protective shell (22) is located at the place where the release agent is applied to the transition film. A release film is pasted on the lower end of the protective shell (22), and a release agent is applied on the side of the release film away from the protective shell (22). After vulcanization, the adhesive applied on the upper part of the protective shell (22) forms an adhesive connection layer (26) that is vulcanized and connected to the trapezoidal rubber block (19). (7) Fix after vulcanization; start vulcanization, and after vulcanization, demold and cool to obtain the airbag.

10. The method for preparing an airbag according to claim 9, wherein: In the step (3), sew the handle (5) and the patch rubber (9) along the sewing line (10), and fit the patch rubber (9) between the edges of the two-layer base film vulcanized and connected; Place the RFID electronic tag (7) between the edges of the two-layer base film vulcanized and connected; The vulcanization parameters are 2.3 MPa × 151 °C × 40 min.

Images