Forming process of rubber air bag for air spring

Abstract

The invention discloses a molding process of a rubber air bag for an air spring, which comprises rubber mixing treatment, calendaring treatment, ring making treatment, molding treatment and sulfur heat treatment, so that accurate feeding, paving and compacting of rubber cord fabric, rubber sheets and steel wire rings can be realized, and the production efficiency and the product quality are remarkably improved; the adaptability of the bottom frame and the ring frame ensures the stability of the forming drum body during rotation, and through the combination of a plurality of groups of electric heaters and sucking pumps, the rapid and uniform heat treatment of semi-finished rubber air bags can be realized, the air flow distribution in the heat circulation barrel is optimized, the local overheating is avoided, the energy utilization efficiency is improved, and the energy consumption and emission are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of rubber airbag processing, in particular to a rubber airbag molding process for air springs. Background Art

[0002] With the development of modern industry in the fields of automobile, railway, aerospace, etc., the requirements for comfort and shock absorption performance are constantly increasing, which leads to an increasing demand for air springs as important shock absorption components. As a key component of air springs, rubber airbags have higher and higher requirements for their molding process, requiring more efficient and precise production processes to meet market demand.

[0003] Since air springs need to withstand repeated compression and tensile deformation during use, the rubber airbag must have good elasticity, fatigue resistance, air tightness and strength. Traditional molding processes may be difficult to fully meet these performance requirements, thus prompting the research and development of new molding processes.

[0004] In conjunction with the above content, it should be explained that: Chinese patent with announcement number CN117698041A discloses an injection vulcanization molding device for air spring rubber airbags, which can cover the outer rubber layer on the inner rubber layer wrapped with a curtain or a reinforcing fiber layer and vulcanize it, so that these two processes can be completed in one device; however, in actual use, the device is only used for single-layer attachment and thermal bonding treatment of the inside of the rubber airbag, and does not consider whether the injection tube guide material is evenly distributed between the airbag and the curtain. As a result, during the actual heat treatment, there are excessive, missing and bubbles in the local adhesion between the airbag and the curtain. At the same time, during the heat treatment of a single opening and closing period of the equipment, there is a large amount of heat diffusion, which fails to fully reflect the energy saving consumption.

[0005] In view of the above-mentioned technical defects, a solution is now proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a rubber airbag molding process for air springs to solve the problems raised.

[0007] To achieve the above object, the present invention provides the following technical solution: A rubber airbag molding process for an air spring comprises the following steps:

[0008] Rubber mixing: put natural rubber or synthetic rubber into an internal mixer, add the required auxiliary agent, mix the rubber and the additive preliminarily to obtain a rubber mix, and pass the rubber mix on an open mixer to obtain a rubber mix;

[0009] Calendering treatment: Use a four-roll calender to calender the mixed rubber onto nylon or polyester cord fabric to obtain rubber cord fabric; use a three-roll calender to calender the mixed rubber into a film to obtain a film;

[0010] Ring making process: multiple steel wires are arranged and wound into a ring with adhesive, and the ring is adjusted and welded to form, and its surface is treated and coated with adhesive to obtain a wire ring;

[0011] Forming process: Use a cutting machine to cut the rubber cord fabric into individual pieces for standby use, lay the inner rubber sheet on the surface of the forming drum on the forming base, compact the overlap, then lay the first layer of rubber cord fabric, press the joints, then lay the second layer of rubber cord fabric at an angle opposite to the first layer, roll and exhaust, buckle and press the wire ring, complete the positive and negative packing, puncture and exhaust, and then roll and compact, finally lay the outer rubber sheet, compact the overlap and roll and exhaust;

[0012] Sulfur heat treatment: Push the assembled rubber airbag semi-finished product into the heat circulation barrel for heat treatment, and after completion, you will get a rubber airbag for air spring.

[0013] Furthermore, a central push cylinder connected to the forming drum body is arranged at the top center of the forming base, a tray is arranged at the top of the central push cylinder, a lifting ring cooperating with the forming drum body is arranged on the outer peripheral wall of the forming base, a heat circulation barrel is arranged above the forming drum body, a plurality of electric heaters are arranged on the inner wall of the heat circulation barrel, and a drum pressing assembly is arranged at one end of the outer peripheral of the forming base.

[0014] Furthermore, the drum pressing assembly includes a lifting column and an extrusion drum body, and a rotary cylinder close to the extrusion drum body is arranged on the side of the lifting column, and a spray plate close to the forming drum body is arranged on the side of the rotary cylinder.

[0015] Furthermore, a lifting cylinder connected to a lifting ring is arranged on the outer wall of the forming base, an electromagnet is slidably sleeved in the inner wall of the ring body of the lifting ring, a fine-tuning cylinder connected to the electromagnet is arranged on the inner wall of the ring body of the lifting ring, a limiting cylinder column sleeved with a forming drum body is arranged on the top of the forming base, and a ring storage platform is recessed on the outer peripheral wall of the top of the forming base.

[0016] Furthermore, a plurality of groups of foldable drum petals are hinged on the cross section of the forming drum body, detachable drum petals are arranged between the plurality of groups of foldable drum petals, a base frame is arranged at the bottom of the forming drum body, an inner push cylinder is arranged at the top center of the base frame, and a support rod connected to the detachable drum petal is arranged at the top of the inner push cylinder.

[0017] Furthermore, a propulsion cylinder frame connected to the outer peripheral wall of the forming base is arranged at the bottom of the lifting column, a moving frame sleeved with the extrusion drum body is arranged on the inner wall of the lifting column, and a servo motor connected to the extrusion drum body is embedded in the frame body of the moving frame.

[0018] Furthermore, an arc rod is sleeved on one side of the rotary cylinder, and a second rotary cylinder is sleeved on the rod body of the arc rod close to one end of the forming drum body, and a spray plate is arranged at the bottom of the second rotary cylinder.

[0019] Furthermore, a limiting kit is provided on the inner wall of the top of the heat circulation barrel, and an air return pipe embedded in the heat circulation barrel is provided on the outer periphery of the top of the limiting kit. A heat-resistant expansion frame is provided on the inner wall of the middle part of the heat circulation barrel, and a heat-resistant expansion airbag and a drag line are provided inside the heat-resistant expansion frame.

[0020] Furthermore, a sealing bin is embedded on the outer peripheral wall of the bottom of the heat circulation barrel, a rotating gear ring is sleeved on the inner wall of the sealing bin, a plurality of groups of limiting guide frames are arranged in a ring at the bottom of the rotating gear ring, an adapting sealing plate is sleeved on the bottom of the limiting guide frame, a fixing ring sleeved with the adapting sealing plate is provided on the inner ring of the rotating gear ring, and a micromotor is provided on the outer periphery of the rotating gear ring.

[0021] The beneficial effects of the present invention are:

[0022] 1. The present invention realizes accurate feeding, laying and compacting of rubber cord cloth, film and wire ring, significantly improves production efficiency and product quality, ensures uniform laying and compacting of rubber cord cloth and film on the forming drum body, and accurate positioning of wire ring, improves product accuracy and consistency, and also realizes rapid installation and positioning of wire ring through designs such as electromagnets and lifting rings, simplifies operating steps and improves production efficiency. At the same time, the adaptive design of the base frame and the ring frame enables the forming drum body to remain stable during rotation.

[0023] 2. The present invention realizes rapid and uniform heat treatment of semi-finished rubber airbags through the combined use of multiple groups of electric heaters and vacuum pumps. The design of the regulating valve and the heat-resistant expansion airbag further optimizes the air flow distribution in the heat circulation barrel to avoid local overheating and improve the heat treatment effect. By extracting the air inside the forming drum and using high-temperature hot air for circulation heating, it not only improves the energy utilization efficiency, but also reduces energy consumption and emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 The process flow chart of the present invention is

[0026] Figure 2 It is a three-dimensional diagram of the overall structure of the present invention;

[0027] Figure 3 It is a structural schematic diagram of the molding base of the present invention;

[0028] Figure 4It is a schematic diagram of the structure of the lifting ring of the present invention;

[0029] Figure 5 It is a schematic diagram of the internal structure of the forming drum body of the present invention;

[0030] Figure 6 It is a bottom view structural schematic diagram of the forming drum body of the present invention;

[0031] Figure 7 It is a structural schematic diagram of the drum pressing assembly of the present invention;

[0032] Figure 8 It is a schematic diagram of the structure of the heat circulation barrel of the present invention;

[0033] Fig. 9 This is a schematic diagram of the structure of the storage compartment of the present invention;

[0034] Fig.10 It is a structural schematic diagram of the heat-resistant expansion frame of the present invention;

[0035] Fig.11 It is a schematic diagram of the hot air flow in the heat circulation barrel of the present invention.

[0036] Figure numerals: 1, forming base; 101, lifting cylinder; 102, lifting ring; 103, ring storage platform; 104, limit cylinder column; 105, electromagnet; 106, fine adjustment cylinder; 2, drum pressing assembly; 201, propulsion cylinder frame; 202, lifting column; 203, moving frame; 204, extrusion drum body; 3, forming drum body; 301, folding drum petal; 302, detachable drum petal; 303, Support rod; 304, base frame; 305, inner push cylinder; 4, heat circulation barrel; 401, limit kit; 402, return air pipe; 403, sealing chamber; 404, heat-resistant expansion frame; 405, rotating gear ring; 406, limit guide frame; 407, adapter sealing plate; 5, center push cylinder; 501, tray; 6, rotary cylinder one; 601, arc rod; 602, rotary cylinder two; 603, spray plate. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] Based on the embodiments of the present invention, ordinary technicians in this field, without making any creative work, can refer to Figure 1 - Fig.11 As shown, this embodiment is a rubber airbag molding process for air springs, comprising the following steps:

[0039] S1: putting natural rubber or synthetic rubber into an internal mixer and adding auxiliary agents; performing preliminary mixing first, controlling the rotor speed of the internal mixer at 40phr, mixing for 3 minutes, so that the rubber and the additives are preliminarily mixed; then increasing the speed to 60phr, continuing mixing for 5 minutes, raising the temperature of the rubber to 100°C, obtaining a mixed rubber, and performing thin pass on an open mixer, controlling the roller distance at 1mm, and performing thin pass times 3 times, so as to further improve the uniformity and plasticity of the rubber, and obtaining a mixed rubber;

[0040] It should be noted that auxiliary agents include vulcanizing agents, accelerators, antioxidants and reinforcing agents. The amount of sulfur in the vulcanizing agent is controlled at 1phr, where phr means the number of parts per hundred parts of rubber. The amount of accelerators such as CBS is controlled at 0.5phr, the amount of antioxidants such as RD is controlled at 1phr, and the amount of reinforcing agents such as carbon black is controlled at 30phr according to the required hardness and strength, which constitutes the rubber refining process;

[0041] S2: Use a four-roll calender to calender the mixed rubber onto nylon or polyester cord fabric. The upper roller temperature is controlled at 90°C, the middle roller temperature is 80°C, the lower roller temperature is 70°C, and the calendering speed is controlled at 10m / min. The calendering thickness is based on the design requirements of the rubber airbag. The total thickness of the rubber cord fabric is 1mm, and the thickness of the rubber layer accounts for about 30%, which constitutes a calendering treatment of the rubber cord fabric to obtain the rubber cord fabric;

[0042] The mixed rubber is calendered into a film by a three-roll calender, the upper roller temperature is 80°C, the middle roller temperature is 70°C, the lower roller temperature is 60°C, the calendering speed is 8m / min, and the film thickness is controlled at 0.5mm according to the requirements of different parts of the rubber airbag, constituting a calendering treatment of the film to obtain the film, constituting calendering treatment II;

[0043] S3: arranging a plurality of steel wires and winding them into a ring with adhesive, and then welding the adjustment ring to form it, treating its surface and applying adhesive to obtain a steel wire ring, thus forming a ring making process;

[0044] S4: Use a cutting machine to cut the rubber cord fabric into single pieces for standby use. According to the designed angle of 30° and width, the rubber cord fabric is cut into single pieces. The cutting angle error is controlled within ±1° and the width error is controlled within ±0.5mm. It can be automatically jointed by a jointing machine or manually jointed. The joints must be firmly connected and the pressure line is even. Then it is rolled into a roll to form a cutting process for the rubber cord fabric.

[0045] The inner rubber sheet is laid on the surface of the forming drum body 3 on the forming base 1, and the overlap is compacted. The thickness of the inner rubber sheet is controlled at 0.5mm according to the design. Then the first layer of rubber cord cloth is laid, the joint is pressed, and then the second layer of rubber cord cloth is laid, the angle is opposite to the first layer, and rolling is performed to exhaust. The fit between each layer of rubber cord cloth should be tight without bubbles, and the wire ring is buckled and pressed to complete the positive and negative packing. After puncturing and exhausting, rolling is performed to compact. Finally, the outer rubber sheet is laid, the overlap is compacted and rolled to exhaust. The thickness of the outer rubber sheet is controlled at 0.5mm, which constitutes the forming process;

[0046] S5: Push the assembled rubber airbag semi-finished product into the heat circulation barrel 4 for heat treatment, the vulcanization temperature is controlled at 140°C, the vulcanization pressure is controlled at 1MPa, and the vulcanization time is controlled within 10 minutes according to the thickness and size of the rubber airbag. After completion, the rubber airbag for air spring is obtained, which constitutes sulfur heat treatment.

[0047] Embodiment 2: This embodiment is a device for realizing the rubber airbag molding process for air springs, comprising a center push cylinder 5 connected to a molding drum body 3 arranged at the top center of a molding base 1, a tray 501 arranged at the top of the center push cylinder 5, and a rotating motor arranged at the bottom of the center push cylinder 5, a lifting ring 102 matched with the molding drum body 3 is arranged on the outer peripheral wall of the molding base 1, a heat circulation barrel 4 is arranged above the molding drum body 3, and a plurality of electric heaters are arranged on the inner wall of the heat circulation barrel 4;

[0048] A drum pressing assembly 2 is provided at one end of the outer periphery of the forming base 1, and the prepared rubber curtain cloth, film and wire ring are transported to the vicinity of the forming base 1 for stacking. After the rubber curtain cloth and film are prepared and loaded through an external device, some required wire rings are placed on the ring storage table 103. Matching semicircular partitions are provided between each group of wire rings to keep a certain distance between them.

[0049] The drum pressing assembly 2 includes a lifting column 202 and an extrusion drum body 204, and a rotary cylinder 6 close to the extrusion drum body 204 is arranged on the side of the lifting column 202, and a spray plate 603 close to the forming drum body 3 is arranged on the side of the rotary cylinder 6.

[0050] A lifting cylinder 101 connected to a lifting ring 102 is arranged on the outer wall of the forming base 1, an electromagnet 105 is slidably sleeved in the inner wall of the ring body of the lifting ring 102, a fine-tuning cylinder 106 connected to the electromagnet 105 is arranged on the inner wall of the ring body of the lifting ring 102, a limiting cylinder column 104 sleeved with the forming drum body 3 is arranged on the top of the forming base 1, a ring storage platform 103 is recessed on the outer peripheral wall of the top of the forming base 1, and a convex ring is convexly arranged on the outer ring of the top of the forming base 1;

[0051] The top wire ring is buckled onto the ring opening at the top of the semi-finished lining by external equipment or manually, and the lifting cylinder 101 drives the lifting ring 102 to slide upward until the lifting ring 102 is close to the uppermost wire ring area, and the fine-tuning cylinder 106 drives multiple groups of electromagnets 105 to move toward the middle, prompting the electromagnet 105 to approach the outer wall of the wire ring. The electromagnet 105 is energized to generate magnetic force, which magnetically limits the group of wire rings in the lifting ring 102 and slides upward under the push of the lifting cylinder 101 until the group of wire rings are sleeved on the bottom ring opening of the semi-finished lining, then the inner village waist ring is sleeved on the thin waist area in the middle of the semi-finished lining, and then the rubber cord cloth and film in the outer area of ​​the semi-finished lining are laid layer by layer according to the above steps to form a semi-finished rubber airbag.

[0052] The top of the central pushing cylinder 5 is connected with the base frame 304 through the tray 501, and the surface of the tray 501 is provided with an electromagnetic strip that is inserted into the base frame 304. When the electromagnetic strip is powered on, the base frame 304 and the tray 501 are magnetically connected. The rotating motor drives the central pushing cylinder 5 to carry the forming drum body 3 to rotate along the top of the forming base 1 through relevant accessories. In this state, the limiting cylinder column 104 retracts into the forming base 1 and is disconnected from the base frame 304. The bottom outer periphery of the base frame 304 is recessed with an annular groove that is adapted to the ring frame. When the base frame 304 rotates with the tray 501, the ring frame is connected to the annular groove and rotates.

[0053] A plurality of groups of foldable drum petals 301 are hinged on the cross section of the forming drum body 3, a detachable drum petal 302 is arranged between the plurality of groups of foldable drum petals 301, a traction fastener slidably sleeved with the foldable drum petal 301 is arranged on the cross section of the detachable drum petal 302, the traction fastener comprises an elastic line and a slider, the slider is slidably connected with the detachable drum petal 302 and the foldable drum petal 301, the elastic line is embedded between the plurality of groups of sliders, and the traction fastener is replaced and adapted according to actual needs, a base frame 304 is arranged at the bottom of the forming drum body 3, an inner push cylinder 305 is arranged at the top center of the base frame 304, a support rod 303 connected with the detachable drum petal 302 is arranged on the top of the inner push cylinder 305, and a recess sleeved with the limiting cylinder column 104 is arranged at the bottom of the base frame 304.

[0054] A propulsion cylinder frame 201 connected to the outer peripheral wall of the molding base 1 is provided at the bottom of the lifting column 202, and a mobile frame 203 sleeved with the extrusion drum 204 is provided on the inner wall of the lifting column 202. A servo motor connected to the extrusion drum 204 is embedded in the frame of the mobile frame 203. The top and bottom of the extrusion drum 204 are both provided with sleeves connected to the mobile frame 203 for rotation, so that the film is attached to the surface of the molding drum 3;

[0055] During this process, the propulsion cylinder frame 201 drives the lifting column 202 to approach the forming drum body 3. A built-in cylinder connected to the moving frame 203 is embedded inside the lifting column 202, and drives the moving frame 203 to slide axially along the lifting column 202, thereby driving the extrusion drum body 204 to approach the forming drum body 3. At the same time, the servo motor drives the extrusion drum body 204 to rotate along the moving frame 203 through the coupling and related accessories. The related accessories are traditional accessories such as gears and shafts, which are not limited to these and can be replaced according to actual needs. The extrusion drum body 204 will compact the film attached to the surface of the forming drum body 3.

[0056] An arc rod 601 is sleeved on the side of the rotary cylinder 6, and a rotary cylinder 2 602 is sleeved on the rod body of the arc rod 601 at one end close to the forming drum body 3. A spray plate 603 is arranged at the bottom of the rotary cylinder 2 602. The rotary cylinder 1 6 drives the arc rod 601 to rotate close to the forming drum body 3 through relevant accessories, and the rotary cylinder 2 602 drives the spray plate 603 to rotate toward the forming drum body 3 through relevant accessories. The external injection device is connected to the spray plate 603 through a pipeline, and provides the spray plate 603 with pressurized adhesive, thereby evenly spraying the adhesive on the surface of the film that is squeezed, attached and compacted on the surface of the forming drum body 3.

[0057] After the film is initially fixed, the rubber cord cloth is alternately fed and wound around the outside of the forming drum body 3 by external equipment, and then the first layer of rubber cord cloth is laid on the surface of the film. In this process, the drum pressing component 2 is also used in coordination to compact and attach the rubber cord cloth, and then the second layer of reverse rubber cord cloth is laid to obtain a semi-finished lining.

[0058] A limiting kit 401 is provided on the inner wall of the top of the heat circulation barrel 4, and an air return pipe 402 embedded in the heat circulation barrel 4 is provided on the outer periphery of the top of the limiting kit 401, and an air pump is provided inside the limiting kit 401, and a heat-resistant expansion frame 404 is provided on the inner wall of the middle part of the heat circulation barrel 4, and a heat-resistant expansion airbag and a drag line are provided inside the heat-resistant expansion frame 404, and the heat-resistant expansion airbag is connected to the outer part of the air return pipe 402;

[0059] The return air pipe 402 is spirally wound in the cylinder wall of the heat circulation barrel 4, and the return air pipe 402 is provided with two groups of spiral pipes, wherein the spiral pipe 1 is located in the inner groove of the cylinder wall of the heat circulation barrel 4, and is provided with an air jet penetrating the inner wall of the bottom of the heat circulation barrel 4, wherein the spiral pipe 2 is located on the outer side of the cylinder wall of the heat circulation barrel 4, a regulating valve is provided between the two groups of spiral pipes, and the bottom of the spiral pipe 2 is connected to the heat-resistant expansion airbag flange.

[0060] When the semi-finished rubber airbag needs to be sent to the heat cycle barrel 4 for heat treatment, the push cylinder frame 201 drives the extrusion drum 204 and the spray plate 603 away from the forming drum 3 through the lifting column 202, and the central push cylinder 5 drives the forming drum 3 to slide up until it enters the heat cycle barrel 4, and the micromotor in the sealing bin 403 is started, and the micromotor drives the rotating gear ring 405 to rotate through related accessories;

[0061] During the rotation of the rotating gear ring 405, the rotating gear ring 405 is hinged to one end of the limiting guide frame 406 through relevant accessories, and the rotating gear ring 405 rotates to push the limiting guide frame 406 to follow its movement. The top of one end of the adapter sealing plate 407 is hinged to the other end of the limiting guide frame 406 through relevant accessories, and the bottom of one end of the adapter sealing plate 407 is hinged to the fixed ring through relevant accessories. The hinge point at the bottom of one end of the adapter sealing plate 407 is the central axis rotation, which causes the adapter sealing plate 407 to rotate, and the shaft of the center push cylinder 5 is clamped in a wrapped manner, so that the tray 501, the forming drum body 3 and the semi-finished rubber airbag are all located inside the heat circulation barrel 4.

[0062] A sealing chamber 403 is embedded on the outer peripheral wall of the bottom of the heat circulation barrel 4, a rotating gear ring 405 is sleeved on the inner wall of the sealing chamber 403, a plurality of groups of limiting guide frames 406 are arranged in an annular manner at the bottom of the rotating gear ring 405, an adapting sealing plate 407 is sleeved at the bottom of the limiting guide frame 406, and a fixing ring sleeved with the adapting sealing plate 407 is arranged on the inner ring of the rotating gear ring 405;

[0063] A micro motor is arranged on the outer periphery of the rotating gear ring 405, and multiple groups of electric heaters are started to perform a small-scale rapid heat treatment on the semi-finished rubber airbag inside the heat cycle. The bottom of the limit kit 401 is inserted into the annular opening at the top of the forming drum body 3, and the air inside the forming drum body 3 is extracted by the vacuum pump, so that the heat inside the heat cycle barrel 4 is transferred to the semi-finished rubber airbag along with the air, and then enters the inside of the forming drum body 3 along the gap at the bottom of the bottom frame 304 with the flowing air;

[0064] After the vacuum pump is connected to the return air pipe 402 by flange, part of the high-temperature hot air is transported through the return air pipe 402 and flows along the inner wall of the heat circulation barrel 4, and finally ejected into the outer area of ​​the bottom area of ​​the heat circulation barrel 4. The top of the vacuum pump is provided with a venting port penetrating the limit kit 401, so that part of the high-temperature gas is poured into the inner top wall of the heat circulation barrel 4 along the venting port, and combined with the airflow injected by the bottom, the airflow inside the heat circulation barrel 4 is forced to flow along a certain trajectory to avoid local overheating;

[0065] The part of low-temperature gas initially retained in the return air pipe 402 is guided and injected into the heat-resistant expansion airbag under the control of the regulating valve, thereby pushing the heat-resistant expansion frame 404 to expand, causing the high-temperature airflow to flow along its vicinity, thereby causing the high-temperature airflow to enter the waist thin area of ​​the forming drum body 3.

[0066] Combining the first and second embodiments, it can be seen that the automated components can work together to achieve accurate loading, laying and compaction of the rubber curtain, the film and the wire ring, significantly improving the production efficiency and product quality, and simplifying the wire ring installation steps by using the electromagnet 105, the lifting ring 102 and other designs, while the adaptability of the bottom frame 304 and the ring frame ensures the stability of the forming drum body 3 during rotation;

[0067] Furthermore, the combination of multiple electric heaters and vacuum pumps can realize rapid and uniform heat treatment of the semi-finished rubber airbag, optimize the airflow distribution in the heat circulation barrel 4, avoid local overheating, improve energy utilization efficiency, and reduce energy consumption and emissions.

[0068] In summary, the present invention provides an efficient, environmentally friendly and flexible solution for rubber product manufacturing, significantly improving production efficiency and product quality.

[0069] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A rubber airbag molding process for air springs, characterized in that: The following steps are involved: Rubber mixing: put natural rubber or synthetic rubber into an internal mixer, add the required auxiliary agent, mix the rubber and the additive preliminarily to obtain a rubber mix, and pass the rubber mix on an open mixer to obtain a rubber mix; Calendering treatment: Use a four-roll calender to calender the mixed rubber onto nylon or polyester cord fabric to obtain rubber cord fabric; use a three-roll calender to calender the mixed rubber into a film to obtain a film; Ring making process: multiple steel wires are arranged and wound into a ring with adhesive, and the ring is adjusted and welded to form, and its surface is treated and coated with adhesive to obtain a wire ring; Forming process: using a cutting machine to cut the rubber cord fabric into individual pieces for standby use, laying the inner rubber sheet on the surface of the forming drum body (3) on the forming base (1), compacting the overlap, then laying the first layer of rubber cord fabric, pressing the joint, and then laying the second layer of rubber cord fabric at an angle opposite to the first layer, rolling to exhaust, buckling the wire ring, completing the front and back packing, piercing to exhaust, and rolling to compact, finally laying the outer rubber sheet, compacting the overlap and rolling to exhaust; Sulfur heat treatment: The assembled rubber airbag semi-finished product is pushed upward into a heat circulation barrel (4) for heat treatment, and after completion, a rubber airbag for air spring is obtained.

2. The device for implementing the rubber airbag molding process for air springs as claimed in claim 1 is characterized in that: A central push cylinder (5) connected to a forming drum body (3) is arranged at the top center of the forming base (1), a tray (501) is arranged at the top of the central push cylinder (5), a lifting ring (102) cooperating with the forming drum body (3) is arranged on the outer peripheral wall of the forming base (1), a heat circulation barrel (4) is arranged above the forming drum body (3), a plurality of electric heaters are arranged on the inner wall of the heat circulation barrel (4), and a drum pressing assembly (2) is arranged at one end of the outer peripheral side of the forming base (1).

3. The device for forming a rubber airbag for an air spring according to claim 2, characterized in that: The drum pressing assembly (2) comprises a lifting column (202) and an extrusion drum body (204), and a rotary cylinder (6) close to the extrusion drum body (204) is arranged on the side of the lifting column (202), and a spray plate (603) close to the forming drum body (3) is arranged on the side of the rotary cylinder (6).

4. The device for forming a rubber airbag for an air spring according to claim 2, characterized in that: A lifting cylinder (101) connected to a lifting ring (102) is arranged on the outer wall of the molding base (1), an electromagnet (105) is slidably sleeved in the inner wall of the ring body of the lifting ring (102), a fine-tuning cylinder (106) connected to the electromagnet (105) is arranged on the inner wall of the ring body of the lifting ring (102), a limiting cylinder column (104) sleeved with a molding drum body (3) is arranged on the top of the molding base (1), and a ring storage platform (103) is recessed on the outer peripheral wall of the top of the molding base (1).

5. The device for forming a rubber airbag for an air spring according to claim 2, characterized in that: A plurality of groups of folded drum petals (301) are hingedly connected on the cross section of the forming drum body (3), and detachable drum petals (302) are arranged between the plurality of groups of folded drum petals (301). A base frame (304) is arranged at the bottom of the forming drum body (3), an inner push cylinder (305) is arranged at the top center of the base frame (304), and a support rod (303) connected to the detachable drum petal (302) is arranged at the top of the inner push cylinder (305).

6. The device for forming a rubber airbag for an air spring according to claim 3, characterized in that: A propulsion cylinder frame (201) connected to the outer peripheral wall of the forming base (1) is arranged at the bottom of the lifting column (202), and a moving frame (203) sleeved with the extrusion drum (204) is arranged on the inner wall of the lifting column (202), and a servo motor drivingly connected to the extrusion drum (204) is embedded in the frame of the moving frame (203).

7. The device for forming a rubber airbag for an air spring according to claim 6, characterized in that: The side of the rotary cylinder 1 (6) is sleeved with an arc rod (601), and the rotary cylinder 2 (602) is sleeved on the rod body of the arc rod (601) at one end close to the forming drum body (3), and a spray plate (603) is arranged at the bottom of the rotary cylinder 2 (602).

8. The device for forming a rubber airbag for an air spring according to claim 2, characterized in that: A limiting kit (401) is arranged on the inner wall of the top of the heat circulation barrel (4), an air return pipe (402) embedded in the inner part of the heat circulation barrel (4) is arranged on the outer periphery of the top of the limiting kit (401), a heat-resistant expansion frame (404) is arranged on the inner wall of the middle part of the heat circulation barrel (4), and a heat-resistant expansion air bag and a towing line are arranged inside the heat-resistant expansion frame (404).

9. The apparatus for forming a rubber airbag for an air spring according to claim 8, characterized in that: A sealing chamber (403) is embedded on the outer peripheral wall of the bottom of the thermal circulation barrel (4), a rotating gear ring (405) is sleeved on the inner wall of the sealing chamber (403), a plurality of groups of limiting guide frames (406) are arranged in an annular manner at the bottom of the rotating gear ring (405), an adapting sealing plate (407) is sleeved on the bottom of the limiting guide frame (406), a fixing ring sleeved on the adapting sealing plate (407) is arranged on the inner ring of the rotating gear ring (405), and a micro motor is arranged on the outer periphery of the rotating gear ring (405).

Images