Inflation supercharging device for hot air welding of air chamber of air spring

Abstract

The utility model discloses an inflating and pressurizing device for hot air welding of an air spring air chamber, which comprises a bottom cabinet, an upper die component is arranged above the bottom cabinet, and a lower die component is arranged below the upper die component; a transferring mechanism is arranged above the bottom cabinet, and a sliding table is arranged on the transferring mechanism; a hot melting top die and a hot melting bottom die which are matched with the upper die assembly and the lower die assembly are arranged at the upper end and the lower end of the sliding table correspondingly. The upper die assembly and the lower die assembly are internally provided with the upper die cavity and the lower die cavity respectively, and the air chamber upper cover and the air chamber lower cover are placed in the upper die cavity and the lower die cavity respectively, so that the upper cover and the lower cover can be positioned and supported in the hot melting welding process, and the uniformity of fusion welding and the qualified rate of finished products are improved; air inlet holes and air outlet grooves are formed in the side edges of the upper die base and the lower die base, air pressure can be provided through a high-pressure air pump, the gas environment and pressure in the welding process are further controlled, and the welding effect can be improved; the problems of atrophy deformation and non-uniform fusion welding caused by thermal expansion and cold contraction in the prior art are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of air springs, in particular to an air charging and pressurizing device for hot air welding of an air spring air chamber. Background Art

[0002] As a key component in the modern automobile suspension system, the air spring not only plays a supporting and cushioning role, but also has the ability to adjust and adapt to a variety of uses. It is an indispensable part of modern automobile suspension technology. Among them, the upper air chamber of the air spring, as an important component of the air spring, has a vital impact on the overall performance of the air spring, and mainly plays a supporting and protective role.

[0003] In order to respond to market trends, reduce costs, and meet the diverse needs of customers, the air spring chamber is generally made of plastic materials in current technology; the air spring chamber is composed of an injection-molded upper shell and a lower shell, which are welded by hot-melt equipment. However, in the existing hot-melt welding process, only the hot-melt mold is used to fuse and solidify the molten surfaces of the plastic upper shell and lower shell. In this process, due to the physical phenomenon of thermal expansion and contraction, the molten surfaces of the upper shell and the lower shell are prone to shrinkage and deformation when cooling and solidifying, resulting in uneven welding and gaps, which ultimately affects the product yield. Summary of the invention

[0004] The utility model aims to provide an air spring air chamber inflation and pressure boosting device for hot air welding 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] An air spring chamber air charging and boosting device for hot air welding, comprising a bottom cabinet, wherein a mounting slot is provided in the middle of the bottom cabinet; an upper mold assembly is provided above the bottom cabinet, wherein a lower mold assembly corresponding to the upper mold assembly is provided in the mounting slot; the upper mold assembly comprises a top plate, wherein the four corners of the top plate are fixedly connected to the upper end of the bottom cabinet through guide columns; a boosting 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; guide sleeves are respectively installed at the four corners of the lifting plate, wherein the guide sleeves are slidably connected to the guide columns; the top end of the piston rod of the boosting cylinder passes through the top plate and is fixedly connected to the lifting plate; the lifting plate A movable plate is provided at the bottom, wherein an upper mold base is provided at the bottom of the movable plate; the upper end of the upper mold base is movably connected to the movable plate, wherein an upper mold cavity is provided at the lower end of the upper mold base; the lower mold assembly includes a bottom plate, wherein support plates are provided at both ends of the bottom plate, and the support plates are fixedly connected to both sides of the inner cavity of the bottom cabinet; a lower mold base is provided at the upper end of the bottom plate, wherein a lower mold cavity is provided at the upper end of the lower mold base; a transfer mechanism is provided above the bottom cabinet, wherein a slide is provided on the transfer mechanism; a hot melt top mold and a hot melt bottom mold are provided at the upper and lower ends of the slide, wherein the hot melt top mold is adapted to the upper mold base, and the hot melt bottom mold is adapted to the lower mold base.

[0007] Preferably, an air chamber upper cover is provided in the upper mold cavity, wherein a plurality of vacuum suction cups are installed at the bottom of the upper mold cavity; the vacuum suction cups are tightly fitted to the outer wall of the air chamber upper cover, wherein the vacuum suction cups are connected to an external vacuum pump through a pipeline.

[0008] Preferably, an air chamber lower cover is provided in the lower mold cavity, wherein a four-claw air cylinder is provided at the bottom of the lower mold cavity; the four-claw air cylinder is arranged on the inner side of the air chamber lower cover, wherein the clamping claws of the four-claw air cylinder can expand outward and abut against the inner wall of the air chamber lower cover.

[0009] Preferably, a circular sealing groove is provided at the lower end of the upper mold base, wherein a heat-resistant rubber gasket is provided on the inner wall of the circular sealing groove, and an annular groove is provided on the heat-resistant rubber gasket.

[0010] Preferably, a plurality of upper air inlet holes are provided on the side of the upper mold base, wherein the upper air inlet holes are connected to the high-pressure air pump through an air inlet pipe; the upper air inlet holes penetrate the upper mold base and are connected to the upper mold cavity, wherein an upper air outlet groove connected to the upper air inlet holes is provided around the periphery of the upper mold cavity.

[0011] Preferably, an upwardly protruding sealing ring is provided at the upper end of the lower die base, wherein the sealing ring is adapted to a circular sealing groove provided at the lower end of the upper die base; the outer diameter of the sealing ring is equivalent to the inner diameter of the circular sealing groove, wherein an "O"-shaped sealing ring is provided on the outer ring of the sealing ring.

[0012] Preferably, a plurality of lower air inlet holes are opened on the side of the lower mold base, wherein the lower air inlet holes are connected to the high-pressure air pump through an air inlet pipe; the lower air inlet holes penetrate the lower mold base and are connected to the lower mold cavity, wherein a lower air outlet groove connected to the lower air inlet holes is arranged around the periphery of the lower mold cavity.

[0013] Preferably, a guide shaft is provided at the lower end of the movable plate, wherein a linear bearing compatible with the guide shaft is provided at the upper end of the upper mold base; telescopic cylinders are symmetrically arranged on both sides of the upper mold base, wherein the bottom of the cylinder body of the telescopic cylinder is fixedly connected to the lower end of the movable plate; a floating joint is provided at the top of the piston rod of the telescopic cylinder, wherein the floating joint is fixedly connected to the outer side wall of the upper mold base through a connecting block.

[0014] Preferably, lifting cylinders are respectively provided below both ends of the bottom plate, wherein the cylinder body of the lifting cylinder is fixedly connected to the lower end of the support plate, and the top end of the piston rod of the lifting cylinder penetrates the support plate upward and is fixedly connected to the bottom plate.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the utility model provides an upper mold cavity and a lower mold cavity in the upper mold assembly and the lower mold assembly respectively, and places the air chamber upper cover and the air chamber lower cover therein, so that the upper cover and the lower cover can be positioned and supported during the hot melt welding process, effectively preventing shrinkage and deformation caused by thermal expansion and contraction, thereby improving the uniformity of fusion welding and the qualified rate of finished products; a plurality of vacuum suction cups are arranged in the upper mold cavity, which are tightly fitted to the air chamber upper cover through vacuum suction to ensure the stability of the upper cover during the welding process; a four-claw cylinder is arranged in the lower mold cavity, and its clamping claws can expand outwards and abut against the inner wall of the air chamber lower cover. The upper and lower mold bases are connected to each other to achieve firm fixation of the lower cover, further improving the accuracy and quality of welding; a circular sealing groove and a sealing ring that cooperate with each other, as well as an "O"-shaped sealing ring, are arranged between the upper mold base and the lower mold base, which effectively enhances the sealing of the welding area; at the same time, air inlet holes and air outlet grooves are arranged on the sides of the upper and lower mold bases, and air pressure can be provided by a high-pressure air pump to further control the gas environment and pressure during welding, which is helpful to improve the welding effect; it effectively solves the problems of shrinkage deformation and uneven fusion welding caused by thermal expansion and contraction in the prior art, and significantly improves the yield and quality of hot-melt welding of air spring chambers. 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 upper mold assembly and the lower mold assembly 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 lifting plate of the utility model;

[0020] Figure 5 It is a structural schematic diagram of the connection between the upper die base and the movable plate of the utility model;

[0021] Figure 6 It is a structural schematic diagram of the upper die seat of the utility model;

[0022] Figure 7 It is a structural schematic diagram of the lower mold assembly of the utility model;

[0023] Figure 8 It is a structural schematic diagram of the lower die base of the utility model;

[0024] Fig. 9 It is a structural schematic diagram of the connection between the transfer mechanism and the slide table of the utility model.

[0025] Among them: 1. bottom cabinet; 2. mounting slot; 3. upper mold assembly; 301. top plate; 302. guide column; 303. booster cylinder; 304. lifting plate; 305. guide sleeve; 306. movable plate; 307. upper mold base; 308. upper mold cavity; 4. lower mold assembly; 401. bottom plate; 402. support plate; 403. lower mold base; 404. lower mold cavity; 5. transfer mechanism; 6. slide; 7. hot melt top mold; 8. hot melt bottom mold; 9. gas Upper cover of air chamber; 10. Vacuum suction cup; 11. Circular sealing groove; 12. Heat-resistant rubber gasket; 13. Annular groove; 14. Upper air inlet hole; 15. Upper air outlet groove; 16. Lower cover of air chamber; 17. Four-claw cylinder; 18. Sealing ring; 19. "O"-shaped sealing ring; 20. Lower air inlet hole; 21. Lower air outlet groove; 22. Guide shaft; 23. Linear bearing; 24. Telescopic cylinder; 25. Floating joint; 26. Connecting block; 27. Lifting cylinder. DETAILED DESCRIPTION

[0026] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0027] Please refer to Figures 1 to 9 To achieve the above purpose, the utility model provides the following technical solutions:

[0028] An air spring air chamber hot air welding inflatable booster device comprises a bottom cabinet 1, wherein a mounting slot 2 is provided in the middle of the bottom cabinet 1; an upper mold assembly 3 is provided above the bottom cabinet 1, wherein a lower mold assembly 4 corresponding to the upper mold assembly 3 is provided in the mounting slot 2; the upper mold assembly 3 comprises a top plate 301, wherein the four corners of the top plate 301 are fixedly connected to the upper end of the bottom cabinet 1 through guide pillars 302; a booster cylinder 303 is provided at the upper end of the top plate 301, wherein a lifting plate 304 is provided at the lower end of the top plate 301; guide sleeves 305 are respectively installed at the four corners of the lifting plate 304, wherein the guide sleeves 305 are slidably connected to the guide pillars 302; the top end of the piston rod of the booster cylinder 303 passes through the top plate 301 and is fixedly connected to the lifting plate 304; a movable plate 306 is provided below the lifting plate 304, wherein the movable plate 30 An upper mold base 307 is provided below 6; the upper end of the upper mold base 307 is movably connected to the movable plate 306, wherein the lower end of the upper mold base 307 is provided with an upper mold cavity 308; the lower mold assembly 4 includes a bottom plate 401, wherein both ends of the bottom plate 401 are respectively provided with support plates 402, and the support plates 402 are fixedly connected to both sides of the inner cavity of the bottom cabinet 1; a lower mold base 403 is provided at the upper end of the bottom plate 401, wherein the upper end of the lower mold base 403 is provided with a lower mold cavity 404; a transfer mechanism 5 is provided above the bottom cabinet 1, wherein the transfer mechanism 5 is provided with a slide 6; a hot melt top mold 7 and a hot melt bottom mold 8 are respectively provided at the upper and lower ends of the slide 6, wherein the slide 6 is moved between the upper mold assembly 3 and the lower mold assembly 4 through the transfer mechanism 5, and the hot melt top mold 7 and the hot melt bottom mold 8 respectively perform hot melting on the upper mold assembly 3 and the lower mold assembly 4.

[0029] By placing the air chamber upper cover 9 to be welded in the upper mold cavity 308, and placing the air chamber lower cover 16 to be welded in the lower mold cavity 404, it is ensured that the upper mold cavity 308 and the lower mold cavity 404 are accurately aligned; then the transfer mechanism 5 is started, and the slide 6 is driven by the transfer mechanism 5 to move between the upper mold base 307 and the lower mold base 403, and then the telescopic cylinder 24 under the movable plate 306 is controlled to push the upper mold base 307 and the air chamber upper cover 9 to move downward synchronously, so that the molten surface of the air chamber upper cover 9 is fitted with the hot melt top mold 7; At the same time, the lifting cylinders 27 at both ends of the bottom plate 401 are controlled to push the bottom plate 401 to move upward, so that the bottom plate 401 drives the lower mold base 403 and the air chamber lower cover 16 to move upward synchronously, so that the molten surface of the air chamber lower cover 16 is fitted with the hot melt bottom mold 8; the hot melt top mold 7 and the hot melt bottom mold 8 are started to heat and soften the molten surfaces of the air chamber upper cover 9 and the air chamber lower cover 16 respectively, and the heating temperature is monitored in real time; when the heating temperature reaches the preset temperature value, the telescopic cylinder 24 is controlled to drive the upper mold base 307 to move upward, so that the air chamber upper cover 9 and the air chamber lower cover 16 are fitted with the hot melt bottom mold 8. The cover 9 is separated from the hot melt top mold 7 and demolded. At the same time, the lifting cylinder 27 drives the lower mold base 403 to move downward, so that the air chamber lower cover 16 is separated from the hot melt bottom mold 8 and demolded. Then the transfer mechanism 5 is controlled to drive the slide 6 to quickly move away from the welding position; finally, the booster cylinder 303 pushes the lifting plate 304 to move downward, so that the lifting plate 304 drives the movable plate 306 and the upper mold base 307 to move downward synchronously and close the mold with the lower mold base 403, so that the melting surfaces of the air chamber upper cover 9 and the air chamber lower cover 16 are tightly in the molten state. Combined to form a firm welding joint; while the upper mold base 307 and the lower mold base 403 are being closed, high-pressure gas is delivered to the upper mold cavity 308 and the lower mold cavity 404, so that the high-pressure gas continuously pressurizes the inside and outside of the air chamber upper cover 9 and the air chamber lower cover 16, thereby controlling the gas environment and pressure during the hot melt welding process, greatly improving the welding effect, avoiding the shrinkage and deformation of the air spring air chamber and uneven welding after solidification, and significantly improving the yield and quality of hot melt welding of the air spring air chamber.

[0030] Please refer to Figures 3 to 6 As an embodiment of the utility model, an air chamber cover 9 is provided in the upper mold cavity 308, wherein a plurality of vacuum suction cups 10 are installed at the bottom of the upper mold cavity 308; the vacuum suction cups 10 are tightly fitted to the outer wall of the air chamber cover 9, wherein the vacuum suction cups 10 are connected to an external vacuum pump through a pipeline.

[0031] In the above-described scheme, check whether the air chamber cover 9 is intact and has no defects such as cracks and deformation, and ensure that it can fit tightly in the upper mold cavity 308; install the vacuum suction cup 10 to ensure that it is tightly connected to the bottom of the upper mold cavity 308 without looseness or leakage; the vacuum suction cup 10 is connected to the external vacuum pump through a pipeline to ensure that the pipeline is tightly connected without leakage; when it is necessary to fix the air chamber cover 9 in the upper mold cavity 308, start the external vacuum pump to generate negative pressure inside the vacuum suction cup 10; under the action of negative pressure, the vacuum suction cup 10 will fit tightly with the outer wall of the air chamber cover 9 to firmly fix it in the upper mold cavity 308; during the entire hot air welding process, the vacuum suction cup 10 always maintains a fixing effect on the air chamber cover 9 to ensure that its position is stable and will not move due to thermal expansion and contraction or external force; after welding is completed, turn off the external vacuum pump to restore the internal pressure of the vacuum suction cup 10 to normal pressure; during the mold opening action of the lifting plate 304, the movable plate 306 and the upper mold base 307 rising, the vacuum suction cup 10 is separated from the air chamber cover 9 to complete the unloading action; by arranging the vacuum suction cup 10 in the upper mold cavity 308 to fix the air chamber cover 9, it is ensured that the position is stable during the hot air welding process, thereby improving the welding quality and the yield rate.

[0032] Please refer to Figure 5 , Figure 6 As an embodiment of the utility model, a circular sealing groove 11 is provided at the lower end of the upper mold base 307, wherein a heat-resistant rubber gasket 12 is provided on the inner wall of the circular sealing groove 11, and an annular groove 13 is provided on the heat-resistant rubber gasket 12; a plurality of upper air inlet holes 14 are provided on the side of the upper mold base 307, wherein the upper air inlet holes 14 are connected to the high-pressure air pump through an air inlet pipe; the upper air inlet holes 14 penetrate the upper mold base 307 and are connected to the upper mold cavity 308, wherein an upper air outlet groove 15 connected to the upper air inlet holes 14 is provided around the periphery of the upper mold cavity 308.

[0033] In the above-mentioned scheme, a heat-resistant rubber gasket 12 is arranged on the inner wall of the circular sealing groove 11 to ensure that the heat-resistant rubber gasket 12 fits tightly in the circular sealing groove 11 without looseness or air leakage, wherein the heat-resistant rubber gasket 12 is used to enhance the sealing effect and maintain stable performance in a high temperature environment; confirm whether the upper air inlet 14 on the side of the upper mold base 307 is unobstructed without blockage or deformation, wherein the upper air inlet 14 is used to introduce high-pressure gas into the upper mold cavity 308, and the upper air inlet 14 is connected to the high-pressure air pump through the air inlet pipe to ensure a tight connection without air leakage; when the upper mold base 307 and the lower mold base 403 are molded together, the circular sealing groove 11 and the corresponding sealing ring 18 on the lower mold base 403 form a sealed cavity; start the high-pressure air pump, and the high-pressure gas enters the upper air inlet 14 through the air inlet pipe and passes through the upper mold base 307. Enter the upper mold cavity 308, where the high-pressure gas diffuses in the upper mold cavity 308 and is evenly distributed around the air chamber cover 9 through the upper air outlet groove 15; the high-pressure gas continues to provide a stable air pressure environment, which helps to control the temperature and gas flow in the welding area and improve the welding quality; after welding is completed, turn off the high-pressure air pump and stop supplying air to the upper air inlet 14. During the mold opening action of the lifting plate 304, the movable plate 306 and the upper mold base 307 rising, the circular sealing groove 11 is separated from the sealing ring 18 to complete the unloading action; by arranging the circular sealing groove 11, the heat-resistant rubber gasket 12, the upper air inlet 14 and the upper air outlet groove 15 at the lower end of the upper mold base 307, an efficient air pressure control system is formed together, which provides a stable air pressure environment and an effective sealing barrier for the hot air welding process, and helps to improve the welding quality and yield rate.

[0034] Please refer to Figure 7 , Figure 8 As an embodiment of the utility model, an air chamber lower cover 16 is provided in the lower mold cavity 404, wherein a four-claw air cylinder 17 is provided at the bottom of the lower mold cavity 404; the four-claw air cylinder 17 is arranged on the inner side of the air chamber lower cover 16, wherein the clamping claws of the four-claw air cylinder 17 can expand outward and abut against the inner wall of the air chamber lower cover 16.

[0035] In the above-described scheme, when it is necessary to fix the air chamber lower cover 16 in the lower mold cavity 404, the four-claw cylinder 17 is started, so that the four-claw cylinder 17 drives the clamping jaws to begin to expand outward; during the expansion process, the clamping jaws will gradually abut against the inner wall of the air chamber lower cover 16 and firmly fix it in the lower mold cavity 404; at this time, the position of the air chamber lower cover 16 is stable and will not move due to external force; during the entire hot air welding process, the four-claw cylinder 17 always maintains a fixing effect on the air chamber lower cover 16 to ensure its accurate position and stable welding quality; after welding is completed, the four-claw cylinder 17 is closed to retract its clamping jaws and separate them from the inner wall of the air chamber lower cover 16; the air chamber lower cover 16 set in the lower mold cavity 404 is fixed by the four-claw cylinder 17 to ensure a stable and accurate position during the hot air welding process, thereby improving the welding quality and yield rate; at the same time, the flexibility and stability of the four-claw cylinder 17 also provide reliable protection for the entire welding process.

[0036] Please refer to Figure 6 , Figure 8 As an embodiment of the utility model, a sealing ring 18 protruding upward is provided at the upper end of the lower mold base 403, wherein the sealing ring 18 is adapted to the circular sealing groove 11 provided at the lower end of the upper mold base 307; the outer diameter of the sealing ring 18 is equivalent to the inner diameter of the circular sealing groove 11, wherein an "O"-shaped sealing ring 19 is provided on the outer ring of the sealing ring 18.

[0037] In the above scheme, check whether the sealing ring 18 at the upper end of the lower mold base 403 is intact, without cracks, deformation or damage, to ensure that it can effectively form a seal with the circular sealing groove 11 at the lower end of the upper mold base 307; confirm that the outer diameter of the sealing ring 18 is equivalent to the inner diameter of the circular sealing groove 11, which is the key to forming an effective seal. If the sizes do not match, it may cause leakage or poor sealing; check whether the "O"-shaped sealing ring 19 arranged around the outer ring of the sealing ring 18 is intact, without aging, breakage or deformation; when the upper mold base 307 and the lower mold base 403 are molded together, the sealing ring 18 will be inserted into the circular sealing groove 11 at the lower end of the upper mold base 307. Since the outer diameter of the sealing ring 18 is equivalent to the inner diameter of the circular sealing groove 11, a close contact will be formed between them; and the "O"-shaped sealing ring 19 The sealing ring 19 cooperates with the annular groove 13 on the heat-resistant rubber gasket 12 to play an additional sealing role, filling any possible tiny gaps to prevent gas leakage; during the hot air welding process, the sealing ring 18 and the "O"-shaped sealing ring 19 work together to maintain the sealing state between the upper mold base 307 and the lower mold base 403, ensuring that the temperature and gas flow in the welding area are effectively controlled; the sealing ring 18 at the upper end of the lower mold base 403 is adapted to the circular sealing groove 11 at the lower end of the upper mold base 307, and through the reinforcing effect of the "O"-shaped sealing ring 19, they together constitute an effective sealing system, which plays a key role in the hot air welding process, ensuring that the temperature and gas flow in the welding area are effectively controlled, thereby improving the welding quality and yield rate.

[0038] See also Figure 8 As an embodiment of the utility model, a plurality of lower air inlet holes 20 are opened on the side of the lower mold base 403, wherein the lower air inlet holes 20 are connected to the high-pressure air pump through an air inlet pipe; the lower air inlet holes 20 penetrate the lower mold base 403 and are connected to the lower mold cavity 404, wherein the lower mold cavity 404 is surrounded by a lower air outlet groove 21 connected to the lower air inlet holes 20.

[0039] In the above-described scheme, check whether the lower air inlet hole 20 on the side of the lower mold base 403 is unobstructed, without blockage or deformation, to ensure that the high-pressure gas can smoothly enter the lower mold cavity 404; confirm that the lower air inlet hole 20 is tightly connected with the high-pressure air pump through the air inlet pipe, without air leakage, to ensure that the high-pressure gas can be stably supplied; when working, start the high-pressure air pump, and the high-pressure gas enters the lower air inlet hole 20 on the side of the lower mold base 403 through the air inlet pipe, wherein the high-pressure gas is transported to the lower air outlet groove 21 through the lower air inlet hole 20, and is evenly distributed in the lower mold cavity 404 through the lower air outlet groove 21; during the hot air welding process, the high-pressure gas filled in the lower mold cavity 404 provides a stable air pressure environment for the welding area, which helps to control the welding temperature and gas flow, and improve the welding quality.

[0040] Please refer to Figure 4 , Figure 5As an embodiment of the utility model, a guide shaft 22 is provided at the lower end of the movable plate 306, wherein a linear bearing 23 adapted to the guide shaft 22 is provided at the upper end of the upper die base 307; telescopic cylinders 24 are symmetrically provided on both sides of the upper die base 307, wherein the bottom of the cylinder body of the telescopic cylinder 24 is fixedly connected to the lower end of the movable plate 306; a floating joint 25 is provided at the top end of the piston rod of the telescopic cylinder 24, wherein the floating joint 25 is fixedly connected to the outer side wall of the upper die base 307 through a connecting block 26.

[0041] In the above-described scheme, when the air chamber upper cover 9 installed in the upper mold base 307 is subjected to hot-melt processing, the telescopic cylinder 24 is started to extend or retract its piston rod; wherein the extension or retraction of the piston rod will drive the upper mold base 307 to move up and down along the guide shaft 22. During the movement of the upper mold base 307, the guide shaft 22 is inserted into the linear bearing 23 and slidably connected thereto, ensuring that the upper mold base 307 can be moved stably and accurately to the specified position; the floating joint 25 arranged at the top of the telescopic cylinder 24 plays a role of buffering and shock absorption between the connecting block 26 and the outer wall of the upper mold base 307, protecting the telescopic cylinder 24 and the entire mold system from impact and damage.

[0042] See also Figure 7 As an embodiment of the utility model, lifting cylinders 27 are respectively provided under both ends of the bottom plate 401, wherein the cylinder body of the lifting cylinder 27 is fixedly connected to the lower end of the support plate 402, and the top end of the piston rod of the lifting cylinder 27 penetrates the support plate 402 upward and is fixedly connected to the bottom plate 401.

[0043] In the above-described scheme, before the lifting cylinder is started, the bottom plate is in the initial position, the piston rod of the lifting cylinder is in a retracted state, and a certain distance is maintained between the bottom plate and the support plate; when the air chamber lower cover 16 installed in the lower mold base 403 is subjected to hot-melt processing, the lifting cylinder 27 is started, so that the lifting cylinder 27 pushes the piston rod to extend upward, so that as the piston rod extends, the bottom plate 401 is lifted and moves upward; when the bottom plate 401 rises to a predetermined position, the lifting cylinder 27 maintains a certain air pressure to maintain the stable state of the bottom plate 401; in this state, the bottom plate 401 drives the lower mold base 403 and the air chamber lower cover 16 to move upward synchronously and fit with the hot-melt bottom mold 8, so that the hot-melt bottom mold 8 heats and softens the molten surface of the air chamber lower cover 16; after the heating is completed, the lifting cylinder 27 is controlled to drive the bottom plate 401 to move downward, so that the bottom plate 401 drives the lower mold base 403 to gradually descend and return to the initial position, which is convenient for subsequent welding.

[0044] 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. An air spring air chamber air charging and boosting device for hot air welding, comprising a base cabinet (1), wherein a mounting groove (2) is provided in the middle of the base cabinet (1); an upper mold assembly (3) is provided above the base cabinet (1), wherein a lower mold assembly (4) corresponding to the upper mold assembly (3) is provided in the mounting groove (2); characterized in that: The upper mold assembly (3) comprises a top plate (301), wherein the top plate (301) is fixedly connected to the upper end of the bottom cabinet (1) at four corners via guide pillars (302); a booster cylinder (303) is provided at the upper end of the top plate (301), wherein a lifting plate (304) is provided at the lower end of the top plate (301); guide sleeves (305) are respectively installed at the four corners of the lifting plate (304), wherein the guide sleeves (305) are slidably connected to the guide pillars (302); the top end of the piston rod of the booster cylinder (303) passes through the top plate (301) and is fixedly connected to the lifting plate (304); a movable plate (306) is provided below the lifting plate (304), wherein an upper mold base (307) is provided below the movable plate (306), and the upper mold base (307) is provided below the movable plate (306). 07) is provided with an upper mold cavity (308) at the lower end; the lower mold assembly (4) comprises a bottom plate (401), wherein both ends of the bottom plate (401) are provided with support plates (402), and the support plates (402) are fixedly connected to both sides of the inner cavity of the bottom cabinet (1); the upper end of the bottom plate (401) is provided with a lower mold base (403), wherein the upper end of the lower mold base (403) is provided with a lower mold cavity (404); a transfer mechanism (5) is provided above the bottom cabinet (1), wherein a slide (6) is provided on the transfer mechanism (5); a hot melt top mold (7) and a hot melt bottom mold (8) are provided at the upper and lower ends of the slide (6), wherein the hot melt top mold (7) is adapted to the upper mold base (307), and the hot melt bottom mold (8) is adapted to the lower mold base (403).

2. The air spring chamber hot air welding charging and boosting device according to claim 1, characterized in that: An air chamber upper cover (9) is provided in the upper mold cavity (308), wherein a plurality of vacuum suction cups (10) are installed at the bottom of the upper mold cavity (308).

3. The air spring chamber hot air welding charging and boosting device according to claim 1, characterized in that: An air chamber lower cover (16) is provided in the lower mold cavity (404), wherein a four-claw air cylinder (17) is provided at the bottom of the lower mold cavity (404).

4. The air spring chamber hot air welding charging and boosting device according to claim 1, characterized in that: A circular sealing groove (11) is provided at the lower end of the upper die seat (307), wherein a heat-resistant rubber gasket (12) is provided on the inner wall of the circular sealing groove (11), and an annular groove (13) is provided on the heat-resistant rubber gasket (12).

5. The air spring chamber hot air welding charging and boosting device according to claim 4, characterized in that: The upper mold base (307) is provided with a plurality of upper air inlet holes (14) on the side thereof, wherein the upper air inlet holes (14) penetrate the upper mold base (307) and are connected with the upper mold cavity (308); and the upper mold cavity (308) is provided with an upper air outlet groove (15) connected with the upper air inlet holes (14) around its periphery.

6. The air spring chamber hot air welding charging and boosting device according to claim 1, characterized in that: The upper end of the lower die base (403) is provided with a sealing ring (18) protruding upward, wherein the outer ring of the sealing ring (18) is provided with an "O"-shaped sealing ring (19).

7. The air spring chamber hot air welding charging and boosting device according to claim 6, characterized in that: The side of the lower die base (403) is provided with a plurality of lower air inlet holes (20), wherein the lower air inlet holes (20) penetrate the lower die base (403) and are connected with the lower die cavity (404); the lower die cavity (404) is surrounded by a lower air outlet groove (21) connected with the lower air inlet holes (20).

8. The air spring chamber hot air welding charging and boosting device according to claim 1, characterized in that: The lower end of the movable plate (306) is provided with a guide shaft (22), wherein the upper end of the upper die seat (307) is provided with a linear bearing (23) matched with the guide shaft (22).

9. The air spring chamber hot air welding charging and boosting device according to claim 8, characterized in that: Telescopic cylinders (24) are symmetrically arranged on both sides of the upper die seat (307), wherein the bottom of the cylinder body of the telescopic cylinder (24) is fixedly connected to the lower end of the movable plate (306); a floating joint (25) is arranged on the top of the piston rod of the telescopic cylinder (24), wherein the floating joint (25) is fixedly connected to the outer side wall of the upper die seat (307) through a connecting block (26).

10. The air spring chamber hot air welding charging and boosting device according to claim 1, characterized in that: Lifting cylinders (27) are respectively provided below both ends of the bottom plate (401), wherein the cylinder body of the lifting cylinder (27) is fixedly connected to the lower end of the support plate (402), and the top end of the piston rod of the lifting cylinder (27) penetrates upward through the support plate (402) and is fixedly connected to the bottom plate (401).

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