Hot melting welding device for upper air chamber of air spring

Abstract

The utility model discloses an air spring upper air chamber sweat soldering device which comprises a bottom cabinet, and a deck plate is arranged at the upper end of the bottom cabinet. An upper die assembly is arranged at the upper end of the deck plate, and a lower die assembly is arranged in an inner cavity of the bottom cabinet. A transferring mechanism is arranged on one side of the upper die assembly, and a hot melting assembly is installed on the transferring mechanism. According to the utility model, the hot melting top die and the hot melting bottom die which correspond to each other up and down are designed and are respectively provided with the upper heating area and the lower heating area, so that the fusion surfaces of the air chamber upper cover and the air chamber lower cover are uniformly heated, and the problems of welding cracks and yield reduction caused by non-uniform heating are effectively avoided; by means of the design of the upper die assembly and the lower die assembly, through fixed connection of guide columns, guide sleeves and supporting plates, the stability and precision in the hot melting welding process are guaranteed, the upper die base and the lower die base can be accurately combined in a butt joint mode, and the welding quality is further improved; and therefore, the problem of non-uniform heating in the sweat soldering process of the upper air chamber of the air spring is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of air springs, in particular to a hot-melt welding device for an upper air chamber of an air spring. Background Art

[0002] With the increasing demand for driving comfort, the shock absorption design of automobile chassis faces more stringent requirements. The traditional steel coil spring shock absorption system has limitations in providing comfortable shock absorption effects because its natural frequency is greatly affected by the deformation distance and the deformation range is limited, especially when driving on bumpy roads, its comfort performance is not satisfactory. For this reason, air springs, as an elastic element with ideal nonlinear mechanical properties, have gradually been widely used in many fields such as commercial vehicle cabs, train secondary suspensions, vehicle suspensions, and equipment shock absorption.

[0003] In the manufacture of air springs, aluminum alloy parts play a pivotal role, but their high cost and heavy weight have always been problems that cannot be ignored. In order to better adapt to market trends, break through existing challenges, and meet the diverse needs of customers, we have innovatively developed an air spring upper chamber assembly that uses plastic instead of metal. This upper chamber assembly includes an injection-molded chamber upper cover and a chamber lower cover, which are fused and solidified by a hot melt device and finally integrated into one. However, in the existing hot melt welding process, we found that the hot melt device heated the molten surface of the chamber upper cover or chamber lower cover unevenly. Due to the design of the equipment, the distribution of the heating elements, and the difference in heat conduction efficiency, some areas of the chamber upper cover and lower cover are overheated, while other areas are not heated enough. This uneven heating makes the temperature distribution of the molten surface uneven, which in turn affects the fluidity and adhesion of the molten material. When the area with a higher temperature on the molten surface meets the area with a lower temperature, due to the thermal expansion and contraction effect and the difference in adhesion, cracks are easily generated at the fusion weld, resulting in loose welding, which seriously affects the product yield. Summary of the invention

[0004] The utility model aims to provide a hot-melt welding device for an upper air chamber of an air spring to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A hot-melt welding device for the upper air chamber of an air spring comprises a base cabinet, wherein a table panel is provided at the upper end of the base cabinet, and a movable groove connected to the inner cavity of the base cabinet is provided in the middle of the table panel; two support plates are provided below the movable groove, wherein the two support plates are respectively fixedly connected to the two side edges of the inner cavity of the base cabinet; an upper mold assembly is provided at the upper end of the table panel, wherein the inner cavity of the base cabinet is provided with a lower mold assembly corresponding to the upper mold assembly, and the lower mold assembly is fixedly connected to the support plates; a transfer mechanism is provided on one side of the upper mold assembly, wherein a hot-melt assembly is installed on the transfer mechanism; the transfer mechanism is used to drive the hot-melt assembly to move between the upper mold assembly and the lower mold assembly, wherein the upper and lower ends of the hot-melt assembly respectively perform hot-melt on the upper mold assembly and the lower mold assembly.

[0007] Preferably, the upper mold assembly includes a top plate, wherein guide columns are respectively provided at the four corners of the top plate, and the lower ends of the guide columns are fixedly connected to the table panels on both sides of the movable groove; a booster cylinder is provided at the upper end of the top plate, wherein a lifting plate is provided at the lower end of the top plate, and the top end of the piston rod of the booster cylinder passes through the top plate and is fixedly connected to the lifting plate; an upper mold base is provided below the lifting plate, wherein an upper mold cavity is opened at the lower end of the upper mold base, and an air chamber upper cover is installed in the upper mold cavity.

[0008] Preferably, movable holes are respectively opened at the four corners of the lifting plate, wherein guide sleeves are installed in the movable holes, and the guide sleeves are sleeved on the outer wall of the guide column and slidably connected thereto.

[0009] Preferably, the lower mold assembly includes a base plate, wherein both ends of the base plate are respectively connected to support plates on both sides of the inner cavity of the base cabinet; a lower mold base is provided at the upper end of the base plate, wherein the lower mold base is fixedly connected to the base plate; a lower mold cavity is opened at the upper end of the lower mold base, wherein an air chamber lower cover is provided in the lower mold cavity.

[0010] Preferably, the hot melt assembly includes a slide, wherein both sides of the slide are fixedly connected to the slide seat of the transfer mechanism respectively; a hot melt top mold is provided at the upper end of the slide, wherein a hot melt bottom mold is provided at the lower end of the slide, and the structures of the hot melt top mold and the hot melt bottom mold are the same; an upper heating zone is provided at the upper end of the hot melt top mold, wherein the upper heating zone is adapted to the inner wall of the upper cover of the air chamber; a lower heating zone is provided at the lower end of the hot melt bottom mold, wherein the lower heating zone is adapted to the inner wall of the lower cover of the air chamber.

[0011] Preferably, the hot melt top mold includes a shell, wherein the inner cavity of the shell is provided with a heating layer and an air supply layer, and the heating layer is arranged above the air supply layer; the heating layer includes an upper heat insulation board, wherein a accommodating cavity is provided in the middle of the upper heat insulation board, and a heat conducting plate is provided in the accommodating cavity; a plurality of heating tubes are inserted in the heat conducting plate, wherein the heating tubes pass through the upper heat insulation board and are connected to an external power supply through a wire; a plurality of heat conducting copper tubes are provided at the upper end of the upper heat insulation board, wherein the plurality of heat conducting copper tubes form an upper heating zone according to the shape of the inner wall of the air chamber upper cover, and the lower end of the heat conducting copper tube passes through the upper heat insulation board and extends downward to above the heat conducting plate.

[0012] Preferably, the air supply layer comprises a lower insulation board, wherein a plurality of air supply channels are provided inside the lower insulation board; an air supply connector connected to the air supply channels is provided on the side of the lower insulation board, wherein the air supply connector is connected to the air pump through an air inlet pipe.

[0013] Preferably, the heat conducting plate is provided with a plurality of through holes, wherein the through holes are evenly distributed along the arrangement direction of the heat conducting copper tubes.

[0014] Preferably, a plurality of air outlet holes connected to the air supply channel are provided at the upper end of the lower heat insulation plate, wherein the air outlet holes correspond one-to-one to the through holes respectively.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the utility model ensures uniform heating of the melting surfaces of the upper and lower air chamber covers by designing corresponding upper and lower hot-melt top molds and hot-melt bottom molds, and each is equipped with an upper heating zone and a lower heating zone, effectively avoiding welding cracks and reduced yield caused by uneven heating; the design of the upper mold assembly and the lower mold assembly ensures stability and precision during hot-melt welding through the fixed connection of the guide column, the guide sleeve and the support plate, so that the upper mold base and the lower mold base can be accurately matched, further improving the welding quality; through the design of the heating layer inside the hot-melt assembly, a combination of a heat-conducting plate and a heating tube is adopted, and the heat-conducting copper tube is used to quickly transfer heat, thereby improving thermal efficiency; at the same time, the design of the air supply layer helps to provide uniform airflow assistance during the heating process, which not only speeds up the heating speed but also ensures the uniformity of heating and reduces energy consumption; the utility model effectively solves the problem of uneven heating during hot-melt welding of the upper air chamber of the air spring through innovative structural design and technical application, improves welding quality and yield, reduces production costs, and has important practical value and market application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the connection between the transfer mechanism and the hot melt component of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the upper mold assembly of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the lower mold assembly of the utility model;

[0020] Figure 5 It is a structural schematic diagram of the hot melt assembly of the utility model;

[0021] Figure 6 It is a schematic diagram of the bottom structure of the hot melt assembly of the utility model;

[0022] Figure 7It is a schematic diagram of the internal structure of the hot-melt top mold of the utility model.

[0023] Among them: 1. base cabinet; 2. table panel; 3. movable groove; 4. support plate; 5. upper mold assembly; 501. top plate; 502. guide column; 503. booster cylinder; 504. lifting plate; 505. upper mold base; 506. upper mold cavity; 507. guide sleeve; 6. lower mold assembly; 601. bottom plate; 602. lower mold base; 603. lower mold cavity; 604. lifting cylinder; 7. transfer mechanism; 8. hot melt assembly; 801. slide; 802. hot melt top mold; 803. hot melt bottom mold; 804. upper heating zone; 805. lower heating zone; 9. air chamber upper cover; 10. air chamber lower cover; 11. shell; 12. upper insulation board; 13. heat conduction board; 14. heating tube; 15. heat conduction copper tube; 16. lower insulation board; 17. air supply joint; 18. through hole. DETAILED DESCRIPTION

[0024] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0025] Please refer to Figures 1 to 7 To achieve the above purpose, the utility model provides the following technical solutions:

[0026] A hot-melt welding device for an upper air chamber of an air spring comprises a base cabinet 1, wherein a table panel 2 is provided at the upper end of the base cabinet 1, and a movable groove 3 communicating with an inner cavity of the base cabinet 1 is provided in the middle of the table panel 2; two support plates 4 are provided below the movable groove 3, wherein the two support plates 4 are respectively fixedly connected to two sides of the inner cavity of the base cabinet 1; an upper mold assembly 5 is provided at the upper end of the table panel 2, wherein a lower mold assembly 6 corresponding to the upper mold assembly 5 is provided in the inner cavity of the base cabinet 1, and the lower mold assembly 6 is fixedly connected to the support plates 4; a transfer mechanism 7 is provided on one side of the upper mold assembly 5, wherein a hot-melt assembly 8 is installed on the transfer mechanism 7; the transfer mechanism 7 drives the hot-melt assembly 8 to move between the upper mold assembly 5 and the lower mold assembly 6, wherein the upper and lower ends of the hot-melt assembly 8 respectively perform hot-melt on the upper mold assembly 5 and the lower mold assembly 6.

[0027] By placing the air chamber upper cover 9 to be welded in the upper mold cavity 506 of the upper mold assembly 5, and placing the air chamber lower cover 10 to be welded in the lower mold cavity of the lower mold assembly 6, ensuring that the upper mold assembly 5 and the lower mold assembly 6 are accurately aligned, preparing for hot melt welding; starting the transfer mechanism 7, driving the hot melt assembly 8 to move along a preset trajectory to between the upper mold assembly 5 and the lower mold assembly 6; then controlling the upper mold assembly 5 to drive the air chamber upper cover 9 to move downward, and controlling the lower mold assembly 6 to drive the air chamber lower cover 10 to move upward, so that the hot melt top mold 802 and the hot melt bottom mold 803 at the upper and lower ends of the hot melt assembly 8 heat the air chamber upper cover 9 and the air chamber lower cover 10 respectively; during the heating process, the heating layers of the hot melt top mold 802 and the hot melt bottom mold 803 generate heat, which is quickly transferred to the melting point of the air chamber upper cover 9 and the air chamber lower cover 10 through the heat-conducting copper tube 15. At the same time, the air supply layer is connected to the air pump through the air supply connector 17 and the air inlet pipe to provide uniform airflow to assist heating, ensuring that the melting surfaces of the air chamber upper cover 9 and the air chamber lower cover 10 are heated more evenly; under the action of heating, the melting surfaces of the air chamber upper cover 9 and the air chamber lower cover 10 gradually soften. After the heating is completed, the transfer mechanism 7 quickly moves the hot melt component 8 away from the welding position to avoid deformation or damage of the material caused by excessive heating. Finally, the upper mold component 5 and the lower mold component 6 are molded together, so that the melting surfaces of the air chamber upper cover 9 and the air chamber lower cover 10 are tightly combined in the molten state to form a firm welding joint; after cooling and curing, the upper mold component 5 and the lower mold component 6 are opened, the welded air spring air chamber product is taken out, and the welding joint is visually inspected and performance tested to ensure that the welding quality meets the requirements and improve production efficiency and product quality.

[0028] Please refer to Figure 1 , Figure 3 As an embodiment of the utility model, the upper mold assembly 5 includes a top plate 501, wherein guide columns 502 are respectively provided at the four corners of the top plate 501, and the lower ends of the guide columns 502 are fixedly connected to the table panels 2 on both sides of the movable groove 3; a booster cylinder 503 is provided at the upper end of the top plate 501, wherein a lifting plate 504 is provided at the lower end of the top plate 501, and the top end of the piston rod of the booster cylinder 503 passes through the top plate 501 and is fixedly connected to the lifting plate 504; an upper mold base 505 is provided below the lifting plate 504, wherein an upper mold cavity 506 is opened at the lower end of the upper mold base 505, and an air chamber upper cover 9 is installed in the upper mold cavity 506.

[0029] In the above-described scheme, the upper mold cavity 506 opened at the lower end of the upper mold base 505 is used to install and support the air chamber cover 9. In the welding preparation stage, the air chamber cover 9 is placed in the upper mold cavity 506 to ensure its accurate and stable position; the boost cylinder 503 is fixedly connected to the lifting plate 504 through a piston rod, and is used to drive the lifting plate 504 to move up and down; when the boost cylinder 503 is working, the piston rod pushes the lifting plate 504 to rise or fall, thereby driving the upper mold base 505 and the air chamber cover 9 in the upper mold cavity 506 to move together; in the hot melt welding stage, the boost cylinder 503 drives the upper mold base 505 to descend, so that the upper mold base 505 drives the air chamber cover 9 to be in close contact with the hot melt top mold 802 at the upper end of the hot melt assembly 8, so that the hot melt top mold 802 evenly heats the molten surface of the air chamber cover 9, preparing for subsequent hot melt welding.

[0030] See also Figure 3 As an embodiment of the utility model, movable holes are respectively opened at the four corners of the lifting plate 504, wherein guide sleeves 507 are installed in the movable holes, and the guide sleeves 507 are sleeved on the outer wall of the guide column 502 and slidably connected thereto.

[0031] In the above-described scheme, the lifting plate 504 is a part of the upper mold assembly 5, which is responsible for carrying the upper mold base 505 and the air chamber upper cover 9. When the booster cylinder 503 is working, the piston rod pushes the lifting plate 504 to rise or fall, thereby driving the upper mold base 505 and the air chamber upper cover 9 to move downward synchronously, wherein the guide column 502 is fixedly connected to the four corners of the top plate 501 to provide a stable guide for the lifting plate 504, and the movable holes opened at the four corners of the lifting plate 504 are installed with guide sleeves 507, which are sleeved on the outer wall of the guide column 502 and slidably connected thereto; during the lifting process, the guide column 502 and the guide sleeve 507 are matched The combination ensures that the lifting plate 504 moves smoothly in the vertical direction and prevents deviation or shaking; the sliding connection between the guide column 502 and the guide sleeve 507 not only provides a guiding function, but also ensures the position accuracy of the lifting plate 504 during the lifting process; the lifting plate 504 not only carries the upper mold base 505 and the air chamber upper cover 9, but also has to withstand the pressure applied by the booster cylinder 503. The solid connection between the guide column 502 and the guide sleeve 507 provides a stable support for the lifting plate 504, enabling it to withstand a large load without deformation or damage, and provides a strong guarantee for the normal operation of the hot melt welding device of the air spring upper air chamber.

[0032] Please refer to Figure 1 , Figure 4As an embodiment of the utility model, the lower mold assembly 6 includes a bottom plate 601, wherein both ends of the bottom plate 601 are respectively connected to the support plates 4 on both sides of the inner cavity of the bottom cabinet 1; a lower mold base 602 is provided at the upper end of the bottom plate 601, wherein the lower mold base 602 is fixedly connected to the bottom plate 601; a lower mold cavity 603 is opened at the upper end of the lower mold base 602, wherein an air chamber lower cover 10 is provided in the lower mold cavity 603; lifting cylinders 604 are respectively provided below both ends of the bottom plate 601, wherein the cylinder body of the lifting cylinder 604 is fixedly connected to the lower end of the support plate 4, and the top end of the piston rod of the lifting cylinder 604 penetrates the support plate 4 upward and is fixedly connected to the bottom plate 601.

[0033] In the above-described scheme, the two ends of the bottom plate 601 are respectively connected to the support plates 4 on both sides of the inner cavity of the bottom cabinet 1. This connection method ensures the stability and position fixity of the bottom plate 601, so that it can withstand various forces and pressures in the subsequent processing process; a lower mold base 602 is provided at the upper end of the bottom plate 601, and the lower mold base 602 and the bottom plate 601 are fixedly connected. This fixed connection can be achieved by bolts, welding or other mechanical connection methods to ensure the stability and position accuracy of the lower mold base 602 on the bottom plate 601; the upper end of the lower mold base 602 is provided with a There is a lower mold cavity 603, in which an air chamber lower cover 10 is arranged; during hot melting, the air chamber lower cover 10 is placed in the lower mold cavity 603 to ensure its accurate and stable position, and then the lifting cylinders 604 at both ends of the bottom plate are driven to push the bottom plate 601 to move upward, so that the bottom plate 601 drives the lower mold base 602 and the air chamber lower cover 10 to move upward, so that the air chamber lower cover 10 is completely in close contact with the hot melt bottom mold 803 at the lower end of the hot melt component 8, and the molten surface of the air chamber lower cover 10 is evenly heated by the hot melt bottom mold 803 to prepare for subsequent hot melt welding.

[0034] Please refer to Figure 2 , Figure 5 and Figure 6 As an embodiment of the utility model, the hot melt assembly 8 includes a slide 801, wherein both sides of the slide 801 are respectively fixedly connected to the slide seat of the transfer mechanism 7; a hot melt top mold 802 is provided at the upper end of the slide 801, wherein a hot melt bottom mold 803 is provided at the lower end of the slide 801, and the structures of the hot melt top mold 802 and the hot melt bottom mold 803 are the same; an upper heating zone 804 is provided at the upper end of the hot melt top mold 802, wherein the upper heating zone 804 is adapted to the inner wall of the air chamber upper cover 9; a lower heating zone 805 is provided at the lower end of the hot melt bottom mold 803, wherein the lower heating zone 805 is adapted to the inner wall of the air chamber lower cover 10.

[0035] In the above-described scheme, both sides of the slide 801 are fixedly connected to the slide seat of the transfer mechanism 7, respectively. This connection method ensures the stability and position fixity of the slide 801 on the transfer mechanism 7, so that it can be accurately moved and positioned under the drive of the transfer mechanism 7; a hot melt top mold 802 is provided at the upper end of the slide 801, wherein a hot melt bottom mold 803 is provided at the lower end of the slide 801, and the hot melt top mold 802 and the hot melt bottom mold 803 have the same structure, which means that they have a certain symmetry or consistency in design and function, and may be used to perform hot melt treatment on the materials to be processed simultaneously or separately; An upper heating zone 804 is provided at the upper end of the hot melt top mold 802, wherein the upper heating zone 804 is adapted to the inner wall of the air chamber upper cover 9, which means that during the hot melt process, the upper heating zone 804 can closely cooperate with the inner wall of the air chamber upper cover 9 to form a closed or specific heating environment to ensure the uniformity and consistency of the hot melt effect; similarly, a lower heating zone 805 is provided at the lower end of the hot melt bottom mold 803, wherein the lower heating zone 805 is adapted to the inner wall of the air chamber lower cover 10; the cooperation between the lower heating zone 805 and the air chamber lower cover 10 is also to form a good heating environment to achieve efficient and uniform hot melt processing.

[0036] Please refer to Figure 1 , Figure 7 As an embodiment of the utility model, since the structures of the hot melt top mold 802 and the hot melt bottom mold 803 are the same, the structure of the hot melt top mold 802 is described in detail in this embodiment, so the structure of the hot melt bottom mold 803 is not repeatedly described; the hot melt top mold 802 includes a shell 11, wherein the inner cavity of the shell is provided with a heating layer and an air supply layer, and the heating layer is arranged above the air supply layer; the heating layer includes an upper heat insulation board 12, wherein a containing cavity is provided in the middle of the upper heat insulation board 12, and a heat conducting plate 13 is provided in the containing cavity; a plurality of heating tubes 14 are inserted into the heat conducting plate 13, wherein the heating tubes 14 pass through the upper heat insulation board 12 and are connected to an external power supply through a wire; a plurality of heat conducting copper tubes 15 are provided at the upper end of the upper heat insulation board 12, wherein the plurality of heat conducting copper tubes 15 form an upper heating zone 804 according to the shape of the inner wall of the air chamber upper cover 9, and the lower end of the heat conducting copper tube 15 passes through the upper heat insulation board 12 and extends downward to above the heat conducting board 13.

[0037] In the above-described scheme, in the inner cavity of the shell 11, the heating layer is responsible for providing the high temperature required for hot melting, and the gas supply layer may be used to provide gas to assist heating or form a specific processing environment; the heating layer includes an upper heat insulation board 12, the main function of which is to prevent heat loss and ensure heating efficiency; a containing cavity is provided in the middle of the upper heat insulation board 12, wherein a heat conducting plate 13 is installed in the containing cavity, and the function of the heat conducting plate 13 is to evenly distribute the heat generated by the heating tube 14 to ensure uniform temperature in the heating area; a plurality of heating tubes 14 are inserted in the heat conducting plate 13, and these heating tubes 14 are the source of heat, wherein the heating tubes 14 pass through the upper heat insulation board 12 and are connected to the external electric The upper heat insulating plate 12 is connected to a source so as to receive electrical energy and convert it into thermal energy; a plurality of heat-conducting copper tubes 15 are provided at the upper end of the upper heat insulating plate 12, wherein the heat-conducting copper tubes 15 have excellent thermal conductivity and can quickly transfer heat from the heat-conducting plate 13 to the upper heating zone 804; and the plurality of heat-conducting copper tubes 15 are arranged and combined according to the shape of the inner wall of the air chamber upper cover 9 to form the upper heating zone 804. This design ensures that the upper heating zone 804 can fit closely with the inner wall of the air chamber upper cover 9 to form a uniform heating environment; the lower end of the heat-conducting copper tube 15 passes through the upper heat insulating plate 12 and extends downward to above the heat-conducting plate 13. This design can maximize the use of the heat of the heat-conducting plate 13 and improve the heat transfer efficiency.

[0038] See also Figure 7 As an embodiment of the utility model, the air supply layer includes a lower heat insulation board 16, wherein the lower heat insulation board 16 has multiple air supply channels (not shown in the figure); the side of the lower heat insulation board 16 is provided with an air supply connector 17 connected to the air supply channel, wherein the air supply connector 17 is connected to the air pump through an air inlet pipe; a plurality of through holes 18 are provided on the heat conducting plate 13, wherein the through holes 18 are evenly distributed along the arrangement direction of the heat conducting copper tubes 15; a plurality of air outlet holes connected to the air supply channel are provided at the upper end of the lower heat insulation board 16, wherein the air outlet holes correspond one by one to the through holes 18 respectively.

[0039] In the above-described scheme, multiple air supply channels are opened inside the lower insulation board 16, and these air supply channels are used to transfer gas so as to provide the necessary gas environment or assistance during the hot melting process; a gas supply connector 17 connected to the air supply channel is provided on the side of the lower insulation board 16, wherein the gas supply connector 17 is connected to the air pump through the air inlet pipe, and the air pump is responsible for providing gas and sending the gas into the air supply channel through the air inlet pipe and the air supply connector 17; a plurality of through holes 18 are opened on the heat conducting plate 13, wherein the through holes 18 are evenly distributed along the arrangement direction of the heat conducting copper tubes 15, and the design of the through holes 18 allows gas to enter the heating layer from the air supply layer, so as to play an auxiliary or optimization role in the heating process; a plurality of air outlet holes connected to the air supply channel are opened on the upper end of the lower insulation board 16, and these air outlet holes correspond one by one to the through holes 18 on the heat conducting plate 13, respectively. Such a design ensures that the gas can pass through the heat conducting plate 13 evenly and form high-temperature gas; the high-temperature gas is blown into the upper heating zone 804 from the tube cavity of the heat conducting copper tube 15 and fully contacts with the air chamber upper cover 9, wherein the high-temperature gas helps the melting surface of the air chamber upper cover 9 to be heated evenly and accelerates the fusion of the melting surface. By controlling the power-on time of the heating tube 14 and the gas supply of the air pump, the temperature and fusion speed of the melting surface can be accurately controlled. When the melting surface reaches the predetermined temperature, the transfer mechanism 7 quickly moves the hot melt assembly 8 away from the welding position to avoid deformation or damage of the material caused by excessive heating. Then the upper mold assembly 5 and the lower mold assembly 6 are molded together to make the melting surfaces of the air chamber upper cover 9 and the air chamber lower cover 10 tightly combined in the molten state, and the melting surface gradually solidifies during the natural cooling process to form a firm welding joint, completing the hot melt welding process.

[0040] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications fall within the protection scope of the present invention.

Claims

1. A hot-melt welding device for an upper air chamber of an air spring, comprising a base cabinet (1), wherein a table panel (2) is provided at the upper end of the base cabinet (1), and a movable groove (3) communicating with an inner cavity of the base cabinet (1) is provided in the middle of the table panel (2); two support plates (4) are provided below the movable groove (3), wherein the two support plates (4) are respectively fixedly connected to two side edges of the inner cavity of the base cabinet (1); characterized in that: An upper mold assembly (5) is provided at the upper end of the table panel (2), wherein a lower mold assembly (6) corresponding to the upper mold assembly (5) is provided in the inner cavity of the base cabinet (1), and the lower mold assembly (6) is fixedly connected to the support plate (4); a transfer mechanism (7) is provided on one side of the upper mold assembly (5), wherein a hot melt assembly (8) is installed on the transfer mechanism (7); the transfer mechanism (7) is used to drive the hot melt assembly (8) to move between the upper mold assembly (5) and the lower mold assembly (6), wherein the upper and lower ends of the hot melt assembly (8) respectively perform hot melting on the upper mold assembly (5) and the lower mold assembly (6).

2. The hot-melt welding device for the upper air chamber of an air spring according to claim 1, characterized in that: The upper mold assembly (5) comprises a top plate (501), wherein guide pillars (502) are respectively provided at the four corners of the top plate (501), and the lower ends of the guide pillars (502) are fixedly connected to the table panels (2) on both sides of the movable groove (3); a booster cylinder (503) is provided at the upper end of the top plate (501), wherein a lifting plate (504) is provided at the lower end of the top plate (501), and the top end of the piston rod of the booster cylinder (503) passes through the top plate (501) and is fixedly connected to the lifting plate (504); an upper mold base (505) is provided below the lifting plate (504), wherein an upper mold cavity (506) is opened at the lower end of the upper mold base (505), and an air chamber upper cover (9) is installed in the upper mold cavity (506).

3. The hot-melt welding device for the upper air chamber of an air spring according to claim 2, characterized in that: The lifting plate (504) is provided with movable holes at the four corners, wherein guide sleeves (507) are installed in the movable holes, and the guide sleeves (507) are sleeved on the outer wall of the guide column (502) and are slidably connected thereto.

4. The hot-melt welding device for the upper air chamber of an air spring according to claim 1, characterized in that: The lower mold assembly (6) comprises a bottom plate (601), wherein two ends of the bottom plate (601) are respectively connected to support plates (4) on both sides of the inner cavity of the bottom cabinet (1); a lower mold base (602) is provided at the upper end of the bottom plate (601), wherein the lower mold base (602) is fixedly connected to the bottom plate (601); a lower mold cavity (603) is opened at the upper end of the lower mold base (602), wherein an air chamber lower cover (10) is provided in the lower mold cavity (603).

5. The hot-melt welding device for the upper air chamber of an air spring according to claim 1, characterized in that: The hot melt assembly (8) comprises a slide (801), wherein both sides of the slide (801) are respectively fixedly connected to the slide seat of the transfer mechanism (7); a hot melt top mold (802) is provided at the upper end of the slide (801), wherein a hot melt bottom mold (803) is provided at the lower end of the slide (801), and the hot melt top mold (802) and the hot melt bottom mold (803) have the same structure; an upper heating zone (804) is provided at the upper end of the hot melt top mold (802), wherein the upper heating zone (804) is adapted to the inner wall of the air chamber upper cover (9); a lower heating zone (805) is provided at the lower end of the hot melt bottom mold (803), wherein the lower heating zone (805) is adapted to the inner wall of the air chamber lower cover (10).

6. The hot-melt welding device for the upper air chamber of an air spring according to claim 5, characterized in that: The hot melt top mold (802) comprises a shell (11), wherein the inner cavity of the shell (11) is provided with a heating layer and an air supply layer, and the heating layer is arranged above the air supply layer; the heating layer comprises an upper heat insulation board (12), wherein a receiving cavity is provided in the middle of the upper heat insulation board (12), and a heat conducting board (13) is provided in the receiving cavity; a plurality of heating tubes (14) are inserted into the heat conducting board (13), wherein the heating tubes (14) pass through the upper heat insulation board (12) and are connected to an external power supply through a wire; a plurality of heat conducting copper tubes (15) are provided at the upper end of the upper heat insulation board (12), wherein the plurality of heat conducting copper tubes (15) form an upper heating zone (804) according to the shape of the inner wall of the air chamber upper cover (9), and the lower end of the heat conducting copper tube (15) passes through the upper heat insulation board (12) and extends downward to above the heat conducting board (13).

7. The hot-melt welding device for the upper air chamber of an air spring according to claim 6, characterized in that: The air supply layer comprises a lower heat insulation board (16), wherein a plurality of air supply channels are provided inside the lower heat insulation board (16); an air supply connector (17) communicating with the air supply channels is provided on the side of the lower heat insulation board (16), wherein the air supply connector (17) is communicated with an air pump via an air inlet pipe.

8. The hot-melt welding device for the upper air chamber of an air spring according to claim 6, characterized in that: The heat conducting plate (13) is provided with a plurality of through holes (18), wherein the through holes (18) are evenly distributed along the arrangement direction of the heat conducting copper tubes (15).

9. The hot-melt welding device for the upper air chamber of an air spring according to claim 7, characterized in that: The upper end of the lower heat insulation board (16) is provided with a plurality of air outlet holes, wherein the air outlet holes correspond one-to-one to the through holes (18).

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