Recyclable EPDM rubber particle processing technology and molding device thereof

Abstract

The invention discloses a recyclable EPDM rubber particle processing technology and a molding device and a melting mechanism thereof, the melting mechanism comprises a heating furnace and an outer shell arranged outside the heating furnace in a sleeving mode, a heating area is arranged between the outer shell and the heating furnace, the bottom of one side of the outer shell communicates with a gas inlet pipe for inputting high-temperature gas, and the bottom of the other side of the outer shell communicates with a gas outlet pipe for inputting high-temperature gas. Through rotation of the rotating shaft, the sealing plug in the expansion part is subjected to the effect of centrifugal force, the centrifugal force enables the sealing plug to overcome the elastic force of the second spring to move in the direction away from the air inlet hole, and therefore the second spring is compressed, the air inlet hole is opened, and high-temperature gas in a heating area enters a flow channel in the rotating shaft through the air inlet hole; high-temperature gas flows along the flow channel, the high-temperature gas in the flow channel can reach the interior of the heating furnace, so that the rubber particles are heated from the interior of the heating furnace, the internal heating mode is combined with heating through the heating area, and the rubber particles can be heated more uniformly.

Description

Technical Field

[0001] The invention relates to the technical field of rubber processing, in particular to a processing technology for recyclable EPDM rubber particles and a molding device thereof. Background Art

[0002] In the production and manufacturing process of EPDM rubber particles in the prior art, the melting method mostly relies on a single external heating source. Since the heat is only slowly transferred from the outside to the inside of the rubber particles, the heat transfer efficiency is low, resulting in a long melting process of the rubber particles. On the other hand, simple external heating can easily cause the problem of uneven heating of the rubber particles. The surface of the rubber particles close to the heating source heats up rapidly, while the particles located deep inside heat up slowly, affecting the production quality and efficiency of the rubber particles. Therefore, a recyclable EPDM rubber particle processing technology and a molding device are urgently needed to solve this problem. Summary of the invention

[0003] The present invention aims at the deficiencies in the prior art and provides the following technical solutions:

[0004] Recyclable EPDM rubber granule molding device, including:

[0005] A melting mechanism, the melting mechanism comprising a heating furnace and an outer shell sleeved outside the heating furnace, a heating area being arranged between the outer shell and the heating furnace, an air inlet pipe for inputting high-temperature gas being arranged at the bottom of one side of the outer shell, the air inlet pipe being connected to the heating area, so as to heat the rubber particles in the heating furnace from the outside;

[0006] A forming mechanism, arranged at the bottom of the melting mechanism;

[0007] The driving mechanism includes a rotating shaft which passes through the melting mechanism and the molding mechanism in sequence, a motor is installed on the top of the rotating shaft, a flow channel is arranged in the rotating shaft along its extension direction, an expansion part is arranged on the surface of the rotating shaft and located in the heating area, a plurality of groups of air inlet holes are opened at the top and bottom of the expansion part for connecting the internal flow channel of the rotating shaft with the heating area, an elastic seal for sealing the air inlet holes is arranged in the expansion part, when the motor drives the rotating shaft to rotate, the elastic seal is compressed under the action of centrifugal force to open the air inlet holes, so that the high-temperature gas in the heating area enters the flow channel of the rotating shaft, so as to realize heating of the rubber particles from the inside of the heating furnace.

[0008] As an improvement of the above technical solution, the molding mechanism includes a molding box arranged at the bottom of the heating furnace, a partition is arranged in the molding box, and the partition divides the cavity of the molding box into a pressure chamber and a molding chamber from top to bottom in sequence. The molding chamber is connected to the heating furnace through a conveying pipe, and a pump body is arranged on the conveying pipe. A molding mold is arranged in the molding chamber, and a cutting knife is arranged on the surface of the rotating shaft and below the molding mold. A pressure piece is arranged in the pressure chamber, and the bottom of the pressure piece passes through the partition and extends into the molding chamber. External force drives the pressure piece to move up and down, and the molten rubber in the molding chamber is pressurized and injected into the molding mold.

[0009] As an improvement of the above technical solution, a filter frame is fixedly sleeved on the surface of the molding box near one end of the bottom, and a plurality of feed holes are opened on the side wall of the molding box below the molding mold, and the feed holes connect the molding chamber with the filter frame, and a fan blade is fixedly connected to the surface of the rotating shaft at the bottom of the molding box.

[0010] As an improvement of the above technical solution, the molding mold includes a cold water mold and a plurality of molding cavities arranged on the cold water mold, a water outlet pipe is connected to the top of one side of the cold water mold, and a water inlet pipe is connected to the bottom of one side of the cold water mold.

[0011] As an improvement of the above technical solution, the pressure member includes a piston slidably arranged in the pressure chamber, and a plurality of groups of plungers corresponding to the positions and quantities of the molding cavities are arranged at the bottom of the piston. The bottom of the plunger passes through the partition and extends into the molding cavity, and a spring is arranged between the piston and the top of the inner wall of the molding box.

[0012] As an improvement of the above technical solution, it also includes a connecting pipe, which has two free ends, one of which is rotatably connected to the bottom of the rotating shaft, and the other free end is arranged at the top of the side wall of the pressure chamber, and the side wall of the pressure chamber is provided with an exhaust pipe at the bottom of the connecting pipe, and the plunger has an inner cavity, and the top of the plunger inner cavity is open.

[0013] As an improvement of the above technical solution, the exhaust pipe is connected to the water inlet pipe through a pipeline, and a valve is provided on the pipeline.

[0014] As an improvement of the above technical solution, a pressure relief pipe communicating with the heating area is provided on the outer shell, and a pressure relief valve is provided on the pressure relief pipe.

[0015] As an improvement of the above technical solution, the elastic sealing component includes a sealing plug for sealing the air inlet hole and a spring 2 arranged between the sealing plug and the inner wall of the expanded part.

[0016] The process for processing recyclable EPDM rubber particles adopts the recyclable EPDM rubber particle forming device described above, and comprises the following steps:

[0017] S1: inputting the recovered EPDM rubber particles into a heating furnace for heating;

[0018] S2: starting the motor, the motor drives the rotating shaft to rotate, the elastic sealing member in the expanded portion of the rotating shaft is acted upon by centrifugal force, so that the air inlet is opened, and the high-temperature gas in the heating area enters the flow channel inside the rotating shaft through the air inlet. After the high-temperature gas enters the flow channel of the rotating shaft, it flows along the flow channel to the inside of the heating furnace, and heats the rubber particles from the inside of the heating furnace until the rubber particles in the heating furnace are in a molten state;

[0019] S3: The molten rubber is transported to a molding box for molding.

[0020] Beneficial effects of the present invention:

[0021] By rotating the rotating shaft, the sealing plug in the expansion part is acted upon by centrifugal force, and the centrifugal force causes the sealing plug to overcome the elastic force of the second spring and move in the direction away from the air inlet hole, thereby compressing the second spring and opening the air inlet hole. The high-temperature gas in the heating area enters the flow channel inside the rotating shaft through the air inlet hole. After the high-temperature gas enters the flow channel of the rotating shaft, it flows along the flow channel. The high-temperature gas in the flow channel can reach the inside of the heating furnace, thereby heating the rubber particles from the inside of the heating furnace. This internal heating method combined with the heating through the heating area can make the rubber particles heated more evenly. The internal heating can accelerate the heat conduction process inside the rubber particles, reduce the problem of excessive temperature difference between the surface and the inside of the rubber particles that may be caused by simple external heating, and is conducive to faster and more even melting of the rubber particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is the front view of the overall structure of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the melting mechanism of the present invention;

[0024] Figure 3 For the present invention Figure 2 A magnified view of the structure at center A;

[0025] Figure 4 It is a structural schematic diagram of the forming mechanism of the present invention.

[0026] 1. The invention relates to a mold comprising a plurality of molds, each of which is a molded product. The mold comprises a plurality of molds, each of which is a plurality of molds, each of which is a plurality of molds. The mold comprises a plurality of molds, each of which is a plurality of molds. The mold comprises a plurality of molds, each of which is a plurality of molds. The mold comprises a plurality of molds, each of which is a plurality of molds. The mold comprises a plurality of molds, each of which is a plurality of molds. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] Embodiment 1

[0029] A recyclable EPDM rubber particle molding device comprises a melting mechanism 10, a molding mechanism 20 and a driving mechanism 40.

[0030] The melting mechanism 10 includes a heating furnace 12 and an outer shell 11 sleeved on the outside of the heating furnace 12, a heating area is provided between the outer shell 11 and the heating furnace 12, an air intake pipe 14 for inputting high-temperature gas is connected to the bottom of one side of the outer shell 11, and the air intake pipe 14 is connected to the heating area to achieve heating of the rubber particles in the heating furnace 12 from the outside, and a pressure relief pipe 13 connected to the heating area is provided on the outer shell 11, and a pressure relief valve is provided on the pressure relief pipe 13.

[0031] refer to Figure 1 , Figure 2When it is necessary to crush the recycled EPDM rubber particles and then transport them into the fusion furnace for melting, the high-temperature gas is input into the heating area between the outer shell 11 and the heating furnace 12 through the air inlet pipe 14. These high-temperature gases flow in the heating area and transfer the heat to the heating furnace 12. The wall of the heating furnace 12 acts as a heat conduction medium to transfer the heat to the rubber particles inside. As the high-temperature gas is continuously input, the temperature in the heating area will gradually increase, and the heat will continue to be transferred into the heating furnace 12 to ensure that the rubber particles are continuously heated until they reach the required melting state. During the heating process, the gas pressure in the heating area becomes higher and higher with the transportation of the air inlet pipe 14. When the pressure exceeds the safety pressure value set by the pressure relief valve, the pressure relief valve will automatically open to discharge the excess gas in the heating area through the pressure relief pipe 13, thereby reducing the pressure in the heating area. When the pressure drops to a safe range, the pressure relief valve will automatically close to maintain the pressure in the heating area stable, ensuring the safety and stability of the heating process.

[0032] The driving mechanism 40 includes a rotating shaft 41 that passes through the melting mechanism 10 and the molding mechanism 20 in sequence, wherein a flow channel is provided in the rotating shaft 41 along its extension direction, a motor 42 is installed on the top of the rotating shaft 41, and an expanded portion 411 is provided on the surface of the rotating shaft 41 and located in the heating area, and a plurality of groups of air inlet holes 412 are provided at the top and bottom of the expanded portion 411 for connecting the internal flow channel of the rotating shaft 41 with the heating area, and an elastic sealing member for sealing the air inlet holes 412 is provided in the expanded portion 411. When the motor 42 drives the rotating shaft 41 When the rotating shaft 41 rotates, the elastic seal is compressed under the action of centrifugal force to open the air inlet hole 412, so that the high-temperature gas in the heating area enters the flow channel of the rotating shaft 41, so as to achieve heating of the rubber particles from the inside of the heating furnace 12. The elastic seal includes a sealing plug 414 for blocking the air inlet hole 412 and a spring 413 arranged between the sealing plug 414 and the inner wall of the expansion part 411, wherein a plurality of groups of the air inlet holes 412 are distributed in a ring array, and the melting mechanism 10 and the molding mechanism 20 are rotatably connected to the rotating shaft 41.

[0033] Specifically, refer to Figure 1 as well as Figure 3When the motor 42 is not started, the rotating shaft 41 is in a stationary state. At this time, the sealing plug 414 in the elastic sealing member blocks the air inlet 412 under the elastic force of the spring 413. In this way, the high-temperature gas in the heating area cannot enter the flow channel inside the rotating shaft 41 and can only flow in the heating area. The heating furnace can be kept warm to avoid excessive heat loss, which lays a solid foundation for the subsequent efficient melting of rubber particles. When the motor 42 is started, the rotating shaft 41 starts to rotate. A stirring shaft is installed on the surface of the rotating shaft 41 and is located in the heating furnace 12. The stirring shaft can stir the rubber particles in the heating furnace 12. At the same time, the sealing plug 414 in the expansion part 411 is subjected to the effect of centrifugal force, and the centrifugal force causes the sealing plug 414 to overcome the spring 413. The elastic force moves in the direction away from the air inlet hole 412, thereby compressing the spring 2 413, so that the air inlet hole 412 is opened, and the high-temperature gas in the heating area enters the flow channel inside the rotating shaft 41 through the air inlet hole 412. After the high-temperature gas enters the flow channel of the rotating shaft 41, it will flow along the flow channel. The high-temperature gas in the flow channel can reach the inside of the heating furnace 12, thereby heating the rubber particles from the inside of the heating furnace 12. This internal heating method is combined with external heating (heating through the heating area) to make the rubber particles heated more evenly. Internal heating can accelerate the heat conduction process inside the rubber particles, reduce the problem of excessive temperature difference between the surface and the inside of the rubber particles that may be caused by simple external heating, and is conducive to faster and more even melting of the rubber particles.

[0034] A molding mechanism 20, wherein the molding mechanism 20 comprises a molding box 21 disposed at the bottom of the heating furnace 12, wherein a partition 211 is disposed in the molding box 21, wherein the partition 211 sequentially divides the cavity of the molding box 21 into a pressure chamber and a molding chamber from top to bottom, wherein the molding chamber is connected to the heating furnace 12 via a delivery pipe, wherein a pump body is disposed on the delivery pipe, wherein a molding mold is disposed in the molding chamber, wherein a cutting knife 44 is disposed on the surface of the rotating shaft 41 and below the molding mold, wherein a pressure piece is disposed in the pressure chamber, wherein the bottom of the pressure piece penetrates the partition 211 and extends into the molding chamber, wherein an external force drives the pressure piece to move up and down, and pressurizes the molten rubber in the molding chamber and injects it into the molding mold;

[0035] refer to Figure 4When the rubber particles are heated and melted into a molten state in the heating furnace 12, the pump body is started, and the rubber in the molten state in the heating furnace 12 is transported in batches to the molding chamber of the molding box 21 through the delivery pipe. The external force acts on the pressure piece in the pressure chamber, causing the pressure piece to move up and down. When the pressure piece moves downward, it will exert pressure on the molten rubber that has entered the molding chamber, and the molten rubber is squeezed and injected into the molding mold. After the rubber is injected into the molding mold and the corresponding molding process is completed, the rotating shaft 41 drives the cutting knife 44 to rotate. The cutting knife 44 is located below the molding mold. The rubber products that have been molded in the molding mold are cut and separated by rotating the cutting knife 44.

[0036] In one embodiment, the molding die includes a cold water die 22 and a plurality of molding cavities 221 disposed on the cold water die 22. A water outlet pipe 223 is connected to the top of one side of the cold water die 22, and a water inlet pipe 224 is connected to the bottom of one side of the cold water die 22.

[0037] Specifically, the main function of the cold water mold 22 is to cool the rubber in a molten state injected into the molding cavity 221 so that it can change from liquid to solid. The water inlet pipe 224 is used to introduce a cooling medium. The cooling medium continuously flows into the cold water mold 22 through the water inlet pipe 224. The cooling medium surrounds each group of molding cavities 221 so as to fully take away the heat released by the rubber during the cooling process.

[0038] In one embodiment, the pressure member includes a piston 23 slidably disposed in the pressure chamber, a plurality of plungers 24 corresponding to the positions and numbers of the molding cavities 221 are disposed at the bottom of the piston 23, the bottom of the plunger 24 penetrates the partition 211 and extends into the molding cavity, and a spring 25 is disposed between the piston 23 and the top of the inner wall of the molding box 21;

[0039] Specifically, when it is necessary to pressurize the molten rubber in the molding chamber, an external force acts on the piston 23, causing the piston 23 to slide downward in the pressure chamber. Since the bottom of the piston 23 is connected to the plunger 24 corresponding to the molding cavity 221, the downward movement of the piston 23 drives the plunger 24 to move downward synchronously, and the plunger 24 then applies pressure to the molten rubber in the molding cavity to inject the rubber into the molding mold. During the pressurization process, the spring 25 is stretched. When the external force is removed, the restorative elastic force of the spring 25 pulls the piston 23 to rebound and reset upward, driving the plunger 24 to move upward together and return to the initial position to prepare for the next pressurization operation.

[0040] In one embodiment, a connecting pipe 50 is further included, wherein the connecting pipe 50 has two free ends, one of which is rotatably connected to the bottom of the rotating shaft 41, and the other free end is disposed at the top of the side wall of the pressure chamber, and an exhaust pipe 51 is disposed on the side wall of the pressure chamber and at the bottom of the connecting pipe 50, and the plunger 24 has an inner cavity, and the top of the inner cavity of the plunger 24 is open;

[0041] Specifically, during the rubber molding process, the hot gas in the flow channel of the rotating shaft 41 enters the space between the top of the piston 23 and the top of the inner wall of the molding box 21 through the connecting pipe 50. After the gas enters this space, it will gradually accumulate. When the gas pressure is greater than the elastic force of the spring 25, the gas will push the piston to move downward. The downward movement of the piston 23 drives the plunger 24 at the bottom to move together. The plunger 24 begins to apply pressure to the rubber in the molding chamber to help the rubber fill the molding mold. When the piston 23 moves to the bottom of the exhaust pipe 51, the gas is discharged from the exhaust pipe 51. At this time, under the pulling force of the spring 25 , which will cause the piston 23 to move up and return to its initial position, repeating this cycle, thereby realizing the reciprocating movement of the plunger 24 up and down. Since high-temperature gas enters the space between the top of the piston 23 and the top of the inner wall of the molding box 21, the gas can enter the inner cavity through the opening at the top of the plunger 24. Through the heat conduction effect of the plunger 24, the rubber in the molding chamber can be auxiliary heated to avoid rubber solidification and blockage. Among them, the distance between the exhaust pipe 51 and the partition 211 is greater than the thickness of the piston 23, which facilitates the movement of the piston 23 to the bottom of the exhaust pipe 51. The plunger 24 is made of a material with high thermal conductivity.

[0042] In one embodiment, a filter frame 30 is fixedly sleeved on the surface of the molding box 21 and near one end of the bottom, and a plurality of feed holes 212 are opened on the side wall of the molding box 21 and located below the molding die, and the feed holes 212 are used to connect the molding chamber with the filter frame 30, and a fan blade 43 is fixedly connected to the surface of the rotating shaft 41 and located at the bottom of the molding box 21;

[0043] Specifically, after the rubber is formed in the molding chamber and cut by the cutting knife 44, the molded rubber particles fall into the filter frame 30 through the discharge hole 212. At the same time, the rotating shaft 41 drives the fan blades 43 to rotate synchronously during operation. The rotation of the fan blades 43 can accelerate the flow of ambient air inside the filter frame 30, prompting the air to quickly pass through the filter frame 30, taking away part of the heat dissipated by the rubber during the molding process, playing a certain heat dissipation role, and avoiding the molding effect of the rubber product affected by excessive heat accumulation.

[0044] In one embodiment, the exhaust pipe 51 is connected to the water inlet pipe 224 through a pipeline, and a valve is provided on the pipeline;

[0045] Specifically, when blockage occurs in the molding cavity 221, stop inputting cooling medium into the water inlet pipe 224, open the valve on the pipe, and allow high-temperature gas to enter the cold water mold through the water inlet pipe 224 to melt and clean the rubber blocked in the molding cavity 221. After cleaning, close the valve and resume normal cooling medium input. The device can then resume normal rubber molding operations to ensure production continuity and stability.

[0046] Embodiment 2

[0047] The processing technology of recyclable EPDM rubber particles adopts the recyclable EPDM rubber particle molding device recorded in Example 1, and comprises the following steps:

[0048] S1: inputting the recovered EPDM rubber particles into a heating furnace for heating;

[0049] S2: The motor 42 is started, and the motor drives the rotating shaft 41 to rotate. The elastic sealing member in the expanded portion 411 on the rotating shaft is acted upon by centrifugal force, so that the air inlet 412 is opened, and the high-temperature gas in the heating area enters the flow channel inside the rotating shaft 41 through the air inlet 412. After the high-temperature gas enters the flow channel of the rotating shaft 41, it flows along the flow channel to the inside of the heating furnace 12, and heats the rubber particles from the inside of the heating furnace 12 until the rubber particles in the heating furnace are in a molten state.

[0050] S3: The molten rubber is transported to a molding box for molding.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A recyclable EPDM rubber particle forming device, characterized in that: include: A melting mechanism (10), the melting mechanism (10) comprising a heating furnace (12) and an outer shell (11) sleeved outside the heating furnace (12), a heating area being provided between the outer shell (11) and the heating furnace (12), an air intake pipe (14) for inputting high-temperature gas being provided at the bottom of one side of the outer shell (11), the air intake pipe (14) being in communication with the heating area, so as to heat the rubber particles in the heating furnace (12) from the outside; A forming mechanism (20) is arranged at the bottom of the melting mechanism (10); The driving mechanism (40) comprises a rotating shaft (41) which passes through the melting mechanism (10) and the molding mechanism (20) in sequence, a motor (42) is installed on the top of the rotating shaft (41), a flow channel is arranged in the rotating shaft (41) along its extension direction, an expansion part (411) is arranged on the surface of the rotating shaft (41) and located in the heating area, a plurality of groups of air inlet holes (412) are opened at the top and bottom of the expansion part (411) for connecting the internal flow channel of the rotating shaft (41) with the heating area, and an elastic sealing member for sealing the air inlet holes (412) is arranged in the expansion part (411), when the motor drives the rotating shaft (41) to rotate, the elastic sealing member is compressed under the action of centrifugal force to open the air inlet holes (412), so that the high-temperature gas in the heating area enters the flow channel of the rotating shaft (41), so as to heat the rubber particles from the inside of the heating furnace (12).

2. The recyclable EPDM rubber particle forming device according to claim 1, characterized in that: The molding mechanism (20) comprises a molding box (21) arranged at the bottom of the heating furnace (12), a partition (211) being arranged in the molding box (21), the partition (211) dividing the cavity of the molding box (21) into a pressure chamber and a molding chamber from top to bottom in sequence, the molding chamber being connected to the heating furnace (12) via a conveying pipe, a pump body being arranged on the conveying pipe, a molding die being arranged in the molding chamber, a cutting knife (44) being arranged on the surface of the rotating shaft (41) and below the molding die, a pressure piece being arranged in the pressure chamber, the bottom of the pressure piece passing through the partition (211) and extending into the molding chamber, an external force driving the pressure piece to move up and down, and pressurizing the molten rubber in the molding chamber and injecting it into the molding die.

3. The recyclable EPDM rubber particle forming device according to claim 2, characterized in that: A filter frame (30) is fixedly sleeved on the surface of the molding box (21) and near one end of the bottom. A plurality of feed holes (212) are provided on the side wall of the molding box (21) and located below the molding die. The feed holes (212) allow the molding chamber to communicate with the filter frame (30). A fan blade (43) is fixedly connected to the surface of the rotating shaft (41) and located at the bottom of the molding box (21).

4. The recyclable EPDM rubber particle forming device according to claim 2, characterized in that: The molding die comprises a cold water die (22) and a plurality of molding cavities (221) arranged on the cold water die (22); a water outlet pipe (223) is arranged at the top of one side of the cold water die (22); and a water inlet pipe (224) is arranged at the bottom of one side of the cold water die (22).

5. The recyclable EPDM rubber particle forming device according to claim 4, characterized in that: The pressure member comprises a piston (23) slidably arranged in the pressure chamber, a plurality of groups of plungers (24) corresponding to the positions and numbers of the molding cavities (221) are arranged at the bottom of the piston (23), the bottom of the plunger (24) passes through the partition (211) and extends into the molding cavity, and a spring (25) is arranged between the piston (23) and the top of the inner wall of the molding box (21).

6. The recyclable EPDM rubber particle forming device according to claim 5, characterized in that: It also includes a connecting pipe (50), the connecting pipe (50) having two free ends, one of which is rotatably connected to the bottom of the rotating shaft (41), and the other free end is arranged at the top of the side wall of the pressure chamber, and the side wall of the pressure chamber is provided with an exhaust pipe (51) at the bottom of the connecting pipe (50), and the plunger (24) has an inner cavity, and the top of the inner cavity of the plunger (24) is open.

7. The recyclable EPDM rubber particle forming device according to claim 6, characterized in that: The exhaust pipe (51) is connected to the water inlet pipe (224) via a pipeline, and a valve is provided on the pipeline.

8. The recyclable EPDM rubber particle forming device according to claim 1, characterized in that: The outer shell (11) is provided with a pressure relief pipe (13) which is in communication with the heating area, and the pressure relief pipe (13) is provided with a pressure relief valve.

9. The recyclable EPDM rubber particle forming device according to claim 1, characterized in that: The elastic sealing member comprises a sealing plug (414) for sealing the air inlet hole (412) and a second spring (413) arranged between the sealing plug (414) and the inner wall of the enlarged portion (411).

10. A process for processing recyclable EPDM rubber particles, characterized in that: The recyclable EPDM rubber particle forming device according to any one of claims 1 to 9 comprises the following steps: S1: inputting the recovered EPDM rubber particles into a heating furnace for heating; S2: starting the motor (42), the motor drives the rotating shaft (41) to rotate, the elastic sealing member in the expanded portion (411) on the rotating shaft is acted upon by centrifugal force, so that the air inlet (412) is opened, and the high-temperature gas in the heating area enters the flow channel inside the rotating shaft (41) through the air inlet (412). After the high-temperature gas enters the flow channel of the rotating shaft (41), it flows along the flow channel to the inside of the heating furnace (12), and heats the rubber particles from the inside of the heating furnace (12) until the rubber particles in the heating furnace are in a molten state; S3: The molten rubber is transported to a molding box for molding.

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