Lining end socket interface enhancement technology and device for IV-type gas cylinder

Abstract

The invention discloses a lining seal head interface enhancement technology and device for an IV-type gas cylinder, and relates to the technical field of hydrogen storage device treatment, the lining seal head interface enhancement device comprises a three-dimensional driving mechanism, a laser head, a gas cylinder and a gas cylinder, the three-dimensional driving mechanism is provided with a three-dimensional driving end, and the three-dimensional driving end is fixedly provided with the laser head; the first positioning mechanism and the second positioning mechanism are symmetrically arranged, the first positioning mechanism is used for positioning the lining end socket from the A surface of the lining end socket, and the second positioning mechanism is used for positioning the lining end socket from the B surface of the lining end socket after being processed by the laser head; the conveying mechanism is located below the second positioning mechanism and used for conveying the magnetic cups at intervals; the magnetic cup is used for receiving the lining end socket provided by the second positioning mechanism. The device is high in automation degree, and the bonding strength of the lining end socket and plastic can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen storage device processing, and specifically to an interface strengthening technology and device for the inner liner head of a type IV gas cylinder. Background Art

[0002] With the development of fuel cell vehicles, the demand for type IV hydrogen storage gas cylinders is becoming increasingly urgent. Type IV cylinders adopt an advanced all-wrapped structure of a plastic inner liner and carbon fiber. The plastic inner liner has higher toughness and deformation coordination ability. The fatigue life of the product exceeds 45,000 cycles, and the product weight can be reduced by about 30% compared with type III cylinders of the same specification. Therefore, the market prospect is broad.

[0003] Due to the difference in interface characteristics between the aluminum alloy valve seat and PA6 dissimilar materials and the coupling effect of the interface stresses of the three interfaces of carbon fiber - aluminum alloy valve seat - polymer, that is, at the position where aluminum alloy valve seat - PA6 - carbon fiber are concentrated, the displacement of PA6 is the largest. Under cyclic loading, this position is most likely to fail, resulting in interface separation and debonding of the two interface structures, and the composite interface separation caused by buckling and bulging deformation of the PA6 inner liner, which affects the sealing performance and fatigue life of the inner liner. When in use, there is a risk of hydrogen leakage, posing a great potential safety hazard. Therefore, the quality of the connection between the aluminum alloy valve seat and the PA6 polymer inner liner is crucial for the performance and safe use of the gas cylinder.

[0004] The key to the direct bonding of metal - polymer lies in the mechanical interlock and intermolecular forces formed by the melt filling into the micro - nano structure on the metal surface. However, traditional methods of constructing micro - nano structures, such as acid - base etching, anodic oxidation, etc., all have the characteristics of long process time, high risk coefficient, and high cost, and cannot be used in large - scale production.

[0005] Therefore, it is necessary to provide an interface strengthening technology and device for the inner liner head of a type IV gas cylinder to solve the above problems. Summary of the Invention

[0006] To solve the above problems, the present invention provides the following technical solution: An interface strengthening device for the inner liner head of a type IV gas cylinder, comprising:

[0007] A three - dimensional driving mechanism, which has a three - dimensional driving end, and a laser head is fixed on the three - dimensional driving end;

[0008] A first positioning mechanism and a second positioning mechanism arranged symmetrically. The first positioning mechanism is used to position the inner liner head from the A - side of the inner liner head, and after being processed by the laser head, the second positioning mechanism positions the inner liner head from the B - side of the inner liner head;

[0009] A transmission mechanism, which is located below the second positioning mechanism and is used to intermittently transmit magnetic cups;

[0010] The magnetic cup is used to receive the inner liner head provided by the second positioning mechanism.

[0011] Further, as a preference, the structures of the first positioning mechanism and the second positioning mechanism are the same. The second positioning mechanism includes:

[0012] A base on which a rotating shaft is rotatably arranged;

[0013] A motor fixed on the base and transmitting power to the rotating shaft through a reduction gear mechanism;

[0014] An axle housing fixed on the rotating shaft for slidably connecting a telescopic shaft;

[0015] A positioning head fixed at the end of the telescopic shaft;

[0016] A telescopic driving member fixed on the axle housing for driving the telescopic shaft to slide along the length direction of the axle housing.

[0017] Further, as a preference, a reset bladder assembly is sleeved on the part of the telescopic shaft located in the axle housing. A plurality of positioning bladders are fixed on the outer surface of the positioning head, and an air pipe connecting the reset bladder assembly and the positioning bladders is arranged in the telescopic shaft.

[0018] Further, as a preference, the reset bladder assembly includes:

[0019] A fixing ring fixed on the outside of the telescopic shaft;

[0020] A sliding ring slidably sleeved on the outside of the telescopic shaft;

[0021] A bladder body connected between the fixing ring and the sliding ring;

[0022] A reset spring connected between the fixing ring and the sliding ring.

[0023] Further, as a preference, a slow rebound assembly is also arranged in the axle housing. The slow rebound assembly is located between the reset bladder assembly and the positioning head. The slow rebound assembly includes slow rebound cotton, and multiple partition meshes and multiple elastic balls are embedded in the slow rebound cotton.

[0024] Further, as a preference, the magnetic cup includes:

[0025] A cup body;

[0026] A plurality of first arc plates circumferentially and arrayedly distributed in the cup body, and a first notch is formed between adjacent two of the first arc plates;

[0027] A plurality of second arc plates circumferentially and arrayedly distributed in the cup body, and the second arc plate has a second notch;

[0028] A magnetic head, which is located within the second arc plate.

[0029] Further, preferably, the second notch faces the first notch, and the second notch is smaller than the first notch.

[0030] An interface enhancement technology for the inner liner head of a type-IV gas cylinder, comprising the following steps:

[0031] S1. Place the A surface of the inner liner head close to the first positioning mechanism, and position the inner liner head by the first positioning mechanism.

[0032] S2. Use the first positioning mechanism to adjust the spatial position of the inner liner head so that the B surface of the inner liner head is close to the laser head, and use the three-dimensional drive mechanism to drive the laser head to process the B surface of the inner liner head.

[0033] S3. The second positioning mechanism receives the inner liner head from the first positioning mechanism and positions the inner liner head from the B surface of the inner liner head.

[0034] S4. Use the second positioning mechanism to adjust the spatial position of the inner liner head so that the A surface of the inner liner head is close to the laser head, and use the three-dimensional drive mechanism to drive the laser head to process the A surface of the inner liner head.

[0035] S5. The transmission mechanism intermittently transmits the magnetic cups.

[0036] S6. Use the second positioning mechanism to adjust the spatial position of the inner liner head and place the inner liner head in the magnetic cup.

[0037] S7. Use the transmission mechanism to transfer the magnetic cup to the next station, and use a magnetic stirrer to stir the silane coupling agent hydrolysis solution in the magnetic cup for 10 minutes.

[0038] S8. Take out the inner liner head and place it in an oven at 100 °C for 10 minutes, and then cool it to room temperature to obtain an inner liner head with a silane coupling agent surface coating treatment.

[0039] Among them, the inner liner is formed by injection molding, and the injection molding process parameters are: melt temperature 250 °C, injection mold temperature 100 °C, holding pressure 65 MPa, holding pressure time 25 s, and cooling time 23 s.

[0040] Compared with the prior art, the present invention provides an interface enhancement technology and device for the inner liner head of a type-IV gas cylinder, having the following beneficial effects:

[0041] In the present invention, before the injection molding process, the inner liner head is subjected to multiple random laser treatments to form a nano-scale microporous structure, and it is silane-coupled. During the injection molding process, the inner liner head is placed in the mold and preheated, avoiding the rapid temperature drop and the formation of a condensation layer when the high-temperature injection melt contacts the normal-temperature inner liner head, which hinders the incorporation of plastic macromolecules into the nano-scale microporous structure, and solving the problems in the prior art that yield phenomena occur inside the metal bottle mouth and the non-metal inner liner, and even blistering and cracking occur, and there is a risk of hydrogen leakage during use, posing a great potential safety hazard.

[0042] In the present invention, by using the first positioning mechanism and the second positioning mechanism in cooperation with the laser head respectively, precise treatment of the A surface and the B surface of the inner liner head can be achieved. This double-sided treatment not only improves the overall anchoring performance of the inner liner head, but also ensures the uniformity and stability of the combination with the subsequent composite material, and the overall automation degree is high. Brief Description of the Drawings

[0043] Figure 1 It is a front view structural schematic diagram of an interface enhancement device for the inner liner head of a type-IV gas cylinder;

[0044] Figure 2 It is a sectional view structural schematic diagram of the second positioning mechanism in an interface enhancement device for the inner liner head of a type-IV gas cylinder;

[0045] Figure 3 It is a three-dimensional view structural schematic diagram of the second positioning mechanism in an interface enhancement device for the inner liner head of a type-IV gas cylinder;

[0046] Figure 4 It is Figure 2 a partial enlarged structural schematic diagram of;

[0047] Figure 5 It is a three-dimensional view structural schematic diagram of the magnetic cup in an interface enhancement device for the inner liner head of a type-IV gas cylinder;

[0048] Figure 6 It is a sectional view structural schematic diagram of the inner liner;

[0049] In the figure: 1. Transmission mechanism; 2. Magnetic cup; 3. First positioning mechanism; 4. Second positioning mechanism; 5. Three-dimensional driving mechanism; 6. Laser head; 21. Cup body; 22. First arc plate; 23. First notch; 24. Second arc plate; 25. Second notch; 26. Magnetic head; 41. Base; 42. Motor; 43. Rotating shaft; 44. Shaft bin; 45. Telescopic shaft; 46. Positioning head; 47. Telescopic driving member; 48. Slow rebound assembly; 49. Reset bladder assembly; 451. Air pipe; 461. Positioning bladder; 481. Slow rebound cotton; 482. Elastic ball; 483. Partition net; 491. Fixed ring; 492. Slip ring; 493. Bladder body; 494. Reset spring. Detailed Embodiments

[0050] The terms "first", "second", etc. in the description, claims and the above-mentioned accompanying drawings description of this application are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances, which is only a way of distinction adopted when describing objects with the same attributes in the embodiments of this application. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, so that a process, method, system, product or device comprising a series of units does not have to be limited to those units, but may include other units that are not clearly listed or are inherent to these processes, methods, products or devices.

[0051] Example: Please refer to Figures 1 - 6 , in the embodiments of the present invention, an interface enhancement device for the inner liner head of a type IV gas cylinder is provided, including:

[0052] A three-dimensional driving mechanism 5, which has a three-dimensional driving end, and a laser head 6 is fixed on the three-dimensional driving end;

[0053] A first positioning mechanism 3 and a second positioning mechanism 4 which are symmetrically arranged. The first positioning mechanism 3 is used to position the inner liner head from the A surface of the inner liner head, and after being processed by the laser head 6, the second positioning mechanism 4 positions the inner liner head from the B surface of the inner liner head;

[0054] A transmission mechanism 1, which is located below the second positioning mechanism 4 and is used to intermittently transmit magnetic cups 2;

[0055] The magnetic cup 2 is used to receive the inner liner head provided by the second positioning mechanism 4.

[0056] During implementation, the following steps are included:

[0057] S1. Move the A surface of the inner liner head close to the first positioning mechanism 3, and the first positioning mechanism 3 positions the inner liner head;

[0058] S2. Use the first positioning mechanism 3 to adjust the spatial position of the inner liner head so that the B surface of the inner liner head is close to the laser head 6, and use the three-dimensional driving mechanism 5 to drive the laser head 6 to process the B surface of the inner liner head;

[0059] S3. The second positioning mechanism 4 receives the inner liner head from the first positioning mechanism 3 and positions the inner liner head from the B surface of the inner liner head;

[0060] S4. Use the second positioning mechanism 4 to adjust the spatial position of the inner liner head so that the A surface of the inner liner head is close to the laser head 6, and use the three-dimensional driving mechanism 5 to drive the laser head 6 to process the A surface of the inner liner head;

[0061] S5. The transfer mechanism 1 transfers the magnetic cups 2 at intervals;

[0062] S6. Use the second positioning mechanism 4 to adjust the spatial position of the inner liner head and place the inner liner head in the magnetic cup 2;

[0063] S7. Use the transfer mechanism 1 to transfer the magnetic cup 2 to the next station, and the magnetic stirrer stirs the silane coupling agent hydrolysis solution in the magnetic cup 2 for 10 minutes;

[0064] S8. Take out the inner liner head and place it in an oven at 100 °C for 10 minutes, and then cool it to room temperature to obtain the inner liner head with a silane coupling agent surface coating treatment.

[0065] That is to say, before the injection molding process, the inner liner head is subjected to multiple random laser treatments to form a nano-scale microporous structure, and it is silane-coupled. During the injection molding process, the inner liner head is placed in the mold and preheated, avoiding the rapid temperature drop when the high-temperature injection melt contacts the normal-temperature inner liner head, which generates a condensation layer and hinders the plastic polymer from integrating into the nano-scale microporous structure, solving the problems of the existing phenomenon of yield between the metal bottle mouth and the non-metal inner liner, even blistering and cracking, and the risk of hydrogen leakage during use, which poses a great safety hazard.

[0066] In this embodiment, the structures of the first positioning mechanism 3 and the second positioning mechanism 4 are the same. The second positioning mechanism 4 includes:

[0067] A base 41, on which a rotating shaft 43 is rotatably provided;

[0068] A motor 42, which is fixed on the base 41 and transmits power to the rotating shaft 43 through a reduction gear mechanism;

[0069] A shaft housing 44, which is fixed on the rotating shaft 43 and is used for slidably connecting a telescopic shaft 45;

[0070] A positioning head 46, which is fixed at the end of the telescopic shaft 45;

[0071] A telescopic driving member 47, which is fixed on the shaft housing 44 and is used for driving the telescopic shaft 45 to slide along the length direction of the shaft housing 44.

[0072] In order to achieve locking and positioning, a reset bladder assembly 49 is sleeved on the part of the telescopic shaft 45 located in the shaft housing 44. A plurality of positioning bladders 461 are fixed on the outer surface of the positioning head 46, and an air pipe 451 connecting the reset bladder assembly 49 and the positioning bladders 461 is provided in the telescopic shaft 45.

[0073] That is to say, when the telescopic driving member 47 drives the telescopic shaft 45 to extend out of the shaft bin 44, it includes two stages. The first stage: the reset bladder assembly 49 is not squeezed. At this time, although the telescopic shaft 45 is moving, the positioning bladder 461 does not change. The second stage: the telescopic shaft 45 continues to move, the reset bladder assembly 49 is gradually squeezed, and the positioning bladder 461 begins to expand and gradually positions the inner liner head.

[0074] Conversely, when the telescopic driving member 47 drives the telescopic shaft 45 to retract into the shaft bin 44, it includes two stages. The third stage: the reset bladder assembly 49 is gradually reset, and the positioning bladder 461 gradually releases the positioning of the inner liner head. The fourth stage: the telescopic shaft 45 continues to move, and the reset bladder assembly 49 has been reset. At this time, although the telescopic shaft 45 is moving, the positioning bladder 461 does not change.

[0075] Then, during implementation, first use the first positioning mechanism 3 to position the inner liner head from the A surface of the inner liner head, and then use the first positioning mechanism 3 to adjust the spatial position of the inner liner head so that the B surface of the inner liner head is close to the laser head 6, and use the three-dimensional driving mechanism 5 to drive the laser head 6 to process the B surface of the inner liner head;

[0076] After that, the second positioning mechanism 4 receives the inner liner head from the first positioning mechanism 3 and positions the inner liner head from the B surface of the inner liner head. The specific process is as follows:

[0077] The first positioning mechanism 3 drives the inner liner head to be horizontal and towards the second positioning mechanism 4,

[0078] The first positioning mechanism 3 drives the inner liner head to move towards the second positioning mechanism 4, so that the inner liner head approaches the second positioning mechanism 4. The telescopic driving member 47 of the second positioning mechanism 4 drives the telescopic shaft 45 to move towards the first positioning mechanism 3. After experiencing the first stage and the second stage, when experiencing the second stage, the first positioning mechanism 3 experiences the third stage, thereby realizing the transfer of the inner liner head.

[0079] In addition, when the second positioning mechanism 4 cooperates with the laser head to process the A surface of the inner liner head, the second positioning mechanism 4 drives the inner liner head to be vertical and towards the magnetic cup 2. Then, the telescopic driving member 47 of the second positioning mechanism 4 drives the telescopic shaft 45 away from the magnetic cup 2. The second positioning mechanism 4 experiences the third stage, and the inner liner head falls into the magnetic cup 2.

[0080] Specifically, the reset bladder assembly 49 includes:

[0081] A fixed ring 491, which is fixed to the outside of the telescopic shaft 45;

[0082] A sliding ring 492, which is slidably sleeved on the outside of the telescopic shaft 45;

[0083] The bladder 493 is connected between the fixed ring 491 and the slip ring 492;

[0084] The return spring 494 is connected between the fixed ring 491 and the slip ring 492.

[0085] In order to prevent the return bladder assembly 49 from being excessively squeezed and damaged, and to enable the inner lining head to fall into the magnetic cup 2 closer to the magnetic cup 2, a slow-rebound assembly 48 is further provided in the shaft bin 44. The slow-rebound assembly 48 is located between the return bladder assembly 49 and the positioning head 46. The slow-rebound assembly 48 includes slow-rebound cotton 481, and multiple dividing meshes 483 and multiple elastic balls 482 are embedded in the slow-rebound cotton 481.

[0086] Due to the slow-rebound characteristic of the slow-rebound assembly 48, therefore, it will not affect the actions of each stage of the second positioning mechanism 4.

[0087] In addition, it should be explained that the slow-rebound cotton 481 is a material with unique rebound characteristics. When the slow-rebound cotton 481 is deformed by an external force, it will not rebound immediately, but will delay for a few seconds and slowly return to its original state.

[0088] In this embodiment, the magnetic cup 2 includes:

[0089] The cup body 21;

[0090] Multiple first arc plates 22 distributed in a circumferential array in the cup body 21, and there is a first notch 23 between adjacent two of the first arc plates 22;

[0091] Multiple second arc plates 24 distributed in a circumferential array in the cup body 21, and the second arc plates 24 have second notches 25;

[0092] The magnetic heads 26 are located inside the second arc plates 24.

[0093] Furthermore, the second notch 25 is aligned with the first notch 23, and the second notch 25 is smaller than the first notch 23.

[0094] Multiple first arc plates 22 and second arc plates 24 are respectively distributed in a circumferential array in the cup body 21. When the magnetic cup 2 is used in cooperation with an external magnetic stirring device for stirring, the uniformly distributed magnetic heads 26 can act on the liquid more effectively, thereby improving the uniformity and efficiency of stirring.

[0095] Moreover, there is a first notch 23 between adjacent two of the first arc plates 22, and the second arc plates 24 have second notches 25 aligned with the first notch 23, enabling the liquid to pass through the space between the arc plates more smoothly, which can significantly improve the stirring efficiency and enable the liquid to reach a uniformly mixed state in a short time.

[0096] In this embodiment, an interface enhancement technology for the inner liner head of a Type IV gas cylinder is also provided, including the following steps:

[0097] S1. Bring the A side of the inner liner head close to the first positioning mechanism 3, and position the inner liner head by the first positioning mechanism 3;

[0098] S2. Use the first positioning mechanism 3 to adjust the spatial position of the inner liner head so that the B side of the inner liner head is close to the laser head 6, and use the three-dimensional drive mechanism 5 to drive the laser head 6 to process the B side of the inner liner head;

[0099] S3. The second positioning mechanism 4 receives the inner liner head from the first positioning mechanism 3 and positions the inner liner head from the B side of the inner liner head;

[0100] S4. Use the second positioning mechanism 4 to adjust the spatial position of the inner liner head so that the A side of the inner liner head is close to the laser head 6, and use the three-dimensional drive mechanism 5 to drive the laser head 6 to process the A side of the inner liner head;

[0101] S5. The transmission mechanism 1 intermittently transmits the magnetic cup 2;

[0102] S6. Use the second positioning mechanism 4 to adjust the spatial position of the inner liner head and place the inner liner head in the magnetic cup 2;

[0103] S7. Use the transmission mechanism 1 to transmit the magnetic cup 2 to the next working station, and the magnetic stirrer stirs the silane coupling agent hydrolysis solution in the magnetic cup 2 for 10 minutes;

[0104] S8. Take out the inner liner head and place it in an oven at 100 °C for 10 minutes, and then cool it to room temperature to obtain an inner liner head with a silane coupling agent surface coating treatment.

[0105] Among them, the relay use of the first positioning mechanism 3 and the second positioning mechanism 4 enables the inner liner head to be easily switched from one side to the other for processing without moving the entire device. This design greatly saves time and improves the processing efficiency.

[0106] In addition, by using the first positioning mechanism 3 and the second positioning mechanism 4 in cooperation with the laser head 6 respectively, precise processing of the A side and the B side of the inner liner head can be achieved. This double-sided processing not only improves the overall performance of the inner liner head but also ensures the uniformity and stability of the combination with the subsequent composite material.

[0107] It should also be noted that this technology combines advanced automation mechanisms (such as the three-dimensional drive mechanism 5 and the transmission mechanism 1), making the entire processing process more automated and intelligent. This not only improves production efficiency but also reduces the error rate of manual operation.

[0108] In addition, the inner liner is formed by injection molding, and the injection process parameters are as follows: melt temperature 250 °C, injection mold temperature 100 °C, holding pressure 65 MPa, holding time 25 s, and cooling time 23 s.

[0109] Among them, the material of the inner liner head is one of aluminum alloy 6061 or austenitic stainless steel S31603. The number of times of laser treatment of the inner liner head is 5 times, 10 times, 15 times, 20 times, preferably 10 times. The laser power for treating the inner liner head is 10 W, 20 W, 40 W, 60 W, 80 W, preferably 40 W.

[0110] Among them, for the laser pretreatment of the aluminum alloy head, a ring structure with irregular water droplet-like shapes is formed on the surface with a maximum of about 52.3 μm and a depth of about 9.51 μm. For the pretreatment of the stainless steel head, a circular structure with clear edges is formed on the surface with a maximum of about 74.1 μm and a depth of about 4.737 μm.

[0111] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. An interface strengthening device for the liner head of a type-IV gas cylinder, characterized in that, Including: A three-dimensional drive mechanism (5) having a three-dimensional drive end with a laser head (6) fixed thereto; A first positioning mechanism (3) and a second positioning mechanism (4) arranged symmetrically, wherein the first positioning mechanism (3) is used to position the inner liner head from the A side of the inner liner head, and after being processed by the laser head (6), the second positioning mechanism (4) positions the inner liner head from the B side of the inner liner head; A transmission mechanism (1) located below the second positioning mechanism (4) for intermittently transmitting the magnetic cups (2); The magnetic cups (2) are used to receive the inner liner heads provided by the second positioning mechanism (4).

2. The interface strengthening device for the inner liner head of a type-IV gas cylinder according to claim 1, characterized in that, The first positioning mechanism (3) and the second positioning mechanism (4) have the same structure. The second positioning mechanism (4) includes: A base (41) on which a rotating shaft (43) is rotatably arranged; A motor (42) fixed to the base (41) and transmitting power to the rotating shaft (43) through a reduction gear mechanism; A shaft housing (44) fixed to the rotating shaft (43) for slidably connecting a telescopic shaft (45); A positioning head (46) fixed to the end of the telescopic shaft (45); A telescopic driving member (47) fixed to the shaft housing (44) for driving the telescopic shaft (45) to slide along the length direction of the shaft housing (44).

3. The interface strengthening device for the inner liner head of a type-IV gas cylinder according to claim 2, wherein A part of the telescopic shaft (45) located in the shaft housing (44) is sleeved with a reset bladder assembly (49). A plurality of positioning bladders (461) are fixed to the outer surface of the positioning head (46). An air pipe (451) connecting the reset bladder assembly (49) and the positioning bladders (461) is provided in the telescopic shaft (45).

4. An interface strengthening device for the liner head of a type-IV gas cylinder according to claim 3, characterized in that, The reset bladder assembly (49) includes: A fixing ring (491) fixed to the outside of the telescopic shaft (45); A sliding ring (492) slidably sleeved on the outside of the telescopic shaft (45); A bladder body (493) connected between the fixing ring (491) and the sliding ring (492); A reset spring (494) connected between the fixing ring (491) and the sliding ring (492).

5. The interface strengthening device for the inner liner head of a type-IV gas cylinder according to claim 3, characterized in that, A slow-rebound assembly (48) is further provided in the shaft housing (44). The slow-rebound assembly (48) is located between the reset bladder assembly (49) and the positioning head (46). The slow-rebound assembly (48) includes slow-rebound cotton (481) in which multiple partition meshes (483) and a plurality of elastic balls (482) are embedded.

6. The interface strengthening device for the inner liner head of a type-IV gas cylinder according to claim 1, characterized in that, The magnetic cup (2) includes: A cup body (21); A plurality of first arc plates (22) arranged in a circumferential array in the cup body (21), with a first notch (23) between adjacent two of the first arc plates (22); A plurality of second arc plates (24) arranged in a circumferential array in the cup body (21), the second arc plate (24) having a second notch (25); A magnetic head (26) located inside the second arc plate (24).

7. The interface strengthening device for the inner liner head of a type IV gas cylinder according to claim 6, characterized in that, The second notch (25) faces the first notch (23), and the second notch (25) is smaller than the first notch (23).

8. An interface enhancement technology for the inner liner head of a type-IV gas cylinder, which uses the interface enhancement device for the inner liner head of a type-IV gas cylinder as described in any one of claims 1-7, is characterized in that, Including the following steps: S1. Place the A side of the inner liner head close to the first positioning mechanism (3), and position the inner liner head by the first positioning mechanism (3); S2. Use the first positioning mechanism (3) to adjust the spatial position of the inner liner head so that the B side of the inner liner head is close to the laser head (6), and use the three-dimensional drive mechanism (5) to drive the laser head (6) to process the B side of the inner liner head; S3. The second positioning mechanism (4) receives the inner liner head from the first positioning mechanism (3), and positions the inner liner head from the B side of the inner liner head; S4. Use the second positioning mechanism (4) to adjust the spatial position of the inner liner head so that the A side of the inner liner head is close to the laser head (6), and use the three-dimensional drive mechanism (5) to drive the laser head (6) to process the A side of the inner liner head; S5. The transmission mechanism (1) intermittently transmits the magnetic cup (2); S6. Use the second positioning mechanism (4) to adjust the spatial position of the inner liner head and place the inner liner head in the magnetic cup (2); S7. Use the transmission mechanism (1) to transmit the magnetic cup (2) to the next working station, and stir the silane coupling agent hydrolysis solution in the magnetic cup (2) for 10 minutes by a magnetic stirrer; S8. Take out the inner liner head and place it in an oven at 100 °C for 10 minutes, and then cool it to room temperature to obtain an inner liner head with a surface coating of silane coupling agent.

9. The interface strengthening technology for the inner liner head of a Type IV gas cylinder according to claim 8, characterized in that, The inner liner is formed by injection molding. The injection molding process parameters are: melt temperature 250 °C, injection mold temperature 100 °C, holding pressure 65 MPa, holding time 25 s, and cooling time 23 s.

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