Rubber processing internal mixer

Abstract

The utility model relates to the technical field of rubber processing, in particular to a rubber processing internal mixer which comprises a machine frame, a processing cavity is formed in the machine frame, a rotor is arranged in the processing cavity, a driving motor is fixed on the machine frame, a second air extractor is arranged on the machine frame, and the second air extractor comprises a second air extraction cylinder fixedly installed on the machine frame. An adsorption filter is fixedly installed on the rack and communicates with an inner cavity of the second air suction cylinder through a second air feeding pipe, a fourth one-way valve is arranged on the second air feeding pipe, the machining cavity communicates with the inner cavity of the second air suction cylinder through a second air suction pipe, and a third one-way valve is arranged on the second air suction pipe. And a second piston is slidably mounted in the second air suction cylinder. According to the internal mixer designed by the utility model, the exhaust stage is added, and volatile harmful gas hidden in rubber can be better extracted by matching the second air extractor with the rotor, so that the content of the harmful gas volatilized into the air in the subsequent processing flow of the rubber is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of rubber processing, in particular to a rubber processing internal mixer. Background Art

[0002] An internal mixer, also known as a closed rubber mixer, is used for plasticating and mixing rubber. When the internal mixer is working, it mainly plasticates and mixes rubber through a rotor in a working cavity at an appropriate temperature and pressure. However, since a large amount of harmful gases are generated during the rubber processing, if these gases are directly discharged into the air without treatment, it will cause air pollution, and directly discharging them into the working environment will also damage the health of workers.

[0003] The utility model patent with the publication number of CN213617694U discloses a pressurized internal mixer for rubber processing. This internal mixer can extract harmful gases in the processing cavity and then purify them through a purification box. However, this device mainly discharges the residual harmful gases in the working cavity after the processing is completed, and cannot cooperate with the rotor to thoroughly remove the volatile harmful gases in the rubber.

[0004] Therefore, we need a rubber processing internal mixer with better ability to purify harmful gases to solve the problem that the existing internal mixer cannot thoroughly clean the volatile harmful gases in the rubber, and can reduce the damage to the health of workers during the rubber processing. Content of the Utility Model

[0005] The purpose of the utility model is to solve the problem that the existing internal mixer cannot thoroughly clean the volatile harmful gases in the rubber. The present application provides a rubber processing internal mixer, which can reduce the damage to the health of workers during the rubber processing.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A rubber processing internal mixer, including a frame, and a processing cavity is opened in the frame. A pair of rotors for rotating and extruding rubber are arranged in the processing cavity, and a driving motor for driving the rotors to rotate is fixed on the frame. A second air extraction device is arranged on the frame. The second air extraction device includes a second air extraction cylinder fixedly installed on the frame, and an adsorption filter is fixedly installed on the frame. The adsorption filter is communicated with the inner cavity of the second air extraction cylinder through a second air delivery pipe, and a fourth one-way valve that only allows gas to flow from the inner cavity of the second air extraction cylinder to the adsorption filter is arranged on the second air delivery pipe. The processing cavity is communicated with the inner cavity of the second air extraction cylinder through a second air extraction pipe, and a third one-way valve that only allows gas to enter the inner cavity of the second air extraction cylinder from the processing cavity is arranged on the second air extraction pipe. A second piston is slidably installed in the second air extraction cylinder, and the second piston reciprocates along the second air extraction cylinder under the drive of a push rod, thereby changing the effective volume of the inner cavity of the second air extraction cylinder to achieve air extraction.

[0007] Optionally, a power conversion device for driving the push rod to reciprocate is provided on the frame. The power conversion device includes a speed reducer fixedly installed on the frame, and the output end of the drive motor drives the power input end of the speed reducer to rotate through a belt. The power output end of the speed reducer drives a rotating arm, and a limit fitting rod is fixedly installed at the end of the rotating arm. A rectangular chute is formed at the end of the push rod. The limit fitting rod is inserted into the rectangular chute, and when the rotating arm rotates, it will drive the limit fitting rod to reciprocate along the rectangular chute and drive the push rod to reciprocate along the central axis of the second air extraction cylinder at the same time.

[0008] Optionally, a first air extraction device is installed on the frame. The first air extraction device includes a first air extraction cylinder fixedly installed on the frame. The inner cavity of the first air extraction cylinder is communicated with the processing cavity through a first air delivery pipe, and a first one-way valve that only allows gas to enter the processing cavity from the inner cavity of the first air extraction cylinder is installed on the first air delivery pipe. An air intake filter box is installed on the frame, and the air in the air intake filter box is filtered by a medium-efficiency filter screen and a dust removal cloth bag. The air intake filter box is communicated with the inner cavity of the first air extraction cylinder through a first air extraction pipe, and a second one-way valve that only allows gas to enter the inner cavity of the first air extraction cylinder from the air intake filter box is installed on the first air extraction pipe. A first piston is slidably installed in the first air extraction cylinder, and the first piston reciprocates along the first air extraction cylinder under the drive of the push rod, thereby changing the effective volume of the inner cavity of the first air extraction cylinder to achieve air extraction.

[0009] Optionally, the first air extraction cylinder and the second air extraction cylinder have the same length, and the diameter of the second air extraction cylinder is at least twice the diameter of the first air extraction cylinder.

[0010] Optionally, a thermostat is installed on the first air extraction pipe, and the thermostat is used to detect the temperature in the processing cavity so as to negatively feedback and regulate the gas flow in the first air extraction pipe.

[0011] Optionally, an air intake cavity is formed by separating the connection part of the processing cavity and the first air delivery pipe through a mesh plate, and an air extraction cavity is formed by a mesh plate at the connection part of the processing cavity and the second air extraction pipe. The air intake cavity and the air extraction cavity are located at the top of the processing cavity.

[0012] Optionally, a feed inlet for feeding rubber raw materials into the processing cavity is provided at the top of the frame, and a discharge port for discharging the rubber processed in the processing cavity is provided at the bottom of the frame. Both the feed inlet and the discharge port are sealed by covers.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] 1. The internal mixer has an additional exhaust stage where the second air extraction device can cooperate with the rotor to better extract the volatile harmful gases hidden in the rubber, thereby reducing the content of harmful gases volatilized into the air during the subsequent processing of the rubber and protecting the physical health of the processing personnel.

[0015] 2. The internal mixer can use the first air extraction device and the second air extraction device to cool the rubber, thereby preventing the rubber from overheating during the exhaust stage and ensuring the production quality of the rubber.

[0016] 3. The internal mixer can use the first air extraction device and the thermostat to control the temperature of the rubber during the exhaust stage, further preventing the internal temperature of the rubber from being too low or too high, which may affect the subsequent processing of the rubber, and ensuring the processing quality of the rubber. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the present utility model;

[0018] Figure 2 It is a side view of the structure of the present utility model;

[0019] Figure 3 It is a schematic cross-sectional view of the present utility model in the horizontal direction;

[0020] Figure 4 It is a schematic installation diagram of the frame and the drive motor of the present utility model;

[0021] Figure 5 It is a schematic structural diagram of the power conversion device of the present utility model;

[0022] Figure 6 It is a schematic structural diagram of the first air extraction device and the second air extraction device of the present utility model;

[0023] Figure 7 It is a cross-sectional view of the internal structures of the first air outlet cylinder and the second air outlet cylinder of the present utility model.

[0024] In the figure: 1, frame; 2, power conversion device; 201, rotating arm; 202, limiting and mating rod; 203, reducer; 3, first air extraction device; 301, first air supply pipe; 302, first piston; 303, first one-way valve; 304, first air extraction cylinder; 305, first air extraction pipe; 306, second one-way valve; 4, second air extraction device; 401, second air extraction pipe; 402, second piston; 403, second air extraction cylinder; 404, second air supply pipe; 405, fourth one-way valve; 406, third one-way valve; 5, discharge port; 6, feed port; 7, processing chamber; 8, air extraction chamber; 9, intake chamber; 10, push rod; 11, rectangular sliding groove; 12, drive motor; 13, rotor; 14, intake filter box; 15, adsorption filter; 16, thermostat; 17, perforated plate. Detailed implementation mode

[0025] In order to clearly and completely describe the purpose and technical solution of the present utility model, and to more clearly explain its advantages, the following further details the embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present utility model, rather than all the embodiments, and are only used to explain the embodiments of the present utility model, not to limit the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0026] Embodiment 1: Please refer to Figures 1 to 4 , the present utility model provides a rubber processing internal mixer, including a frame 1, and a processing cavity 7 is opened in the frame 1. A pair of rotors 13 for squeezing rubber by rotation are arranged in the processing cavity 7, and a driving motor 12 for driving the rotation of the rotors 13 is fixed on the frame 1. A feed port 6 for feeding rubber raw materials into the processing cavity 7 is opened at the top of the frame 1, and a discharge port 5 for discharging the rubber processed in the processing cavity 7 is opened at the bottom of the frame 1. Both the feed port 6 and the discharge port 5 are sealed by covers. The rubber raw materials are fed into the processing cavity 7 through the feed port 6 and discharged through the discharge port 5 after being processed by the rotors 13.

[0027] Please refer to Figures 1 to 7, a second air extraction device 4 is provided on the frame 1. The second air extraction device 4 includes a second air extraction cylinder 403 fixedly installed on the frame 1, and an adsorption filter 15 is fixedly installed on the frame 1. The adsorption filter 15 is communicated with the inner cavity of the second air extraction cylinder 403 through a second air delivery pipe 404. A fourth one-way valve 405 that only allows gas to flow from the inner cavity of the second air extraction cylinder 403 to the adsorption filter 15 is provided on the second air delivery pipe 404. The processing chamber 7 is communicated with the inner cavity of the second air extraction cylinder 403 through a second air extraction pipe 401. A third one-way valve 406 that only allows gas to enter the inner cavity of the second air extraction cylinder 403 from the processing chamber 7 is provided on the second air extraction pipe 401. A second piston 402 is slidably installed in the second air extraction cylinder 403, and the second piston 402 reciprocates along the second air extraction cylinder 403 driven by the push rod 10, so as to change the effective volume of the inner cavity of the second air extraction cylinder 403 to achieve air extraction. When the rubber raw material is fed into the processing chamber 7, the feed port 6 and the discharge port 5 will be sealed so that the inside of the processing chamber 7 is in a sealed state. When the volume of the inner cavity of the second air extraction cylinder 403 becomes larger, the gas in the processing chamber 7 will be drawn into the inner cavity of the second air extraction cylinder 403. When the volume of the inner cavity of the second air extraction cylinder 403 becomes smaller, the gas in the inner cavity of the second air extraction cylinder 403 will be squeezed into the adsorption filter 15 for filtration, and then the filtered gas will be discharged into the air. Adsorption filtering substances such as activated carbon can be provided in the adsorption filter 15. By extracting air through the second air extraction device 4, the processing chamber 7 can be gradually evacuated to a vacuum state, so that the harmful gases inside the rubber can effectively diffuse into the processing chamber 7 and then be extracted to the adsorption filter 15 for purification. In this way, the harmful gases in the rubber can be prevented from directly entering the air. The adsorption filter 15 can also be replaced with other devices for treating harmful gases according to the usage needs, such as reaction vessels for treating nitrides or sulfides.

[0028] Please refer to Figure 1 , Figure 2 and Figure 5, a power conversion device 2 for driving the push rod 10 to reciprocate is arranged on the frame 1. The power conversion device 2 includes a speed reducer 203 fixedly installed on the frame 1, and the output end of the driving motor 12 drives the power input end of the speed reducer 203 to rotate through a belt. The power output end of the speed reducer 203 drives a rotating arm 201, and a limiting and matching rod 202 is fixedly installed at the end of the rotating arm 201. A rectangular sliding groove 11 is formed at the end of the push rod 10. The limiting and matching rod 202 is inserted into the rectangular sliding groove 11. When the rotating arm 201 rotates, it will drive the limiting and matching rod 202 to reciprocate along the rectangular sliding groove 11 and drive the push rod 10 to reciprocate along the central axis of the second air extraction cylinder 403 at the same time. Through the power conversion device 2, the rotational motion provided by the driving motor 12 can be effectively converted into a periodic reciprocating motion capable of driving the push rod 10, so as to realize the continuous vacuum pumping operation of the second air extraction device 4 inside the processing cavity 7.

[0029] In this embodiment, the working process of the internal mixer is successively divided into a feeding stage, an internal mixing operation stage, an exhaust stage, and a discharging stage. In the feeding stage, workers put rubber raw materials into the processing cavity 7. In the internal mixing stage, the workers close the processing cavity 7, then remove the belt connecting the output end of the driving motor 12 and the power input end of the speed reducer 203, and at the same time adjust the second piston 402 to a position just closing the second air extraction pipe 401. Subsequently, the processing cavity 7 is pressurized to a preset pressure state by an external pressurization device, and then the rubber can be processed by the rotor 13. In the exhaust stage, the workers connect the output end of the driving motor 12 and the power input end of the speed reducer 203 through a belt, and then drive the second air extraction device 4 to extract air from the processing cavity 7 through the driving motor 12. In the discharging stage, the workers take out the rubber that has been processed inside the processing cavity 7. Therefore, this internal mixer can continue to process the rubber raw materials by driving the rotor 13 through the driving motor 12 in the exhaust stage, and can also drive the second air extraction device 4 to evacuate the inside of the processing cavity 7 through the driving motor 12, so as to extract the harmful gases in the rubber into the adsorption filter 15 for purification treatment, effectively avoiding the air pollution caused by the direct emission of harmful gases into the air. Moreover, when the second air extraction device 4 extracts air, the rotor 13 also flips the rubber synchronously, so that the harmful gases in the rubber can be exposed as much as possible and then extracted at one time, solving the problem that the existing internal mixer fails to thoroughly clean the volatile harmful gases in the rubber, and reducing the damage to the health of workers during the rubber processing process.

[0030] Embodiment 2: Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7, on the basis of the first embodiment, a first air extraction device 3 is installed on the frame 1. The first air extraction device 3 includes a first air extraction cylinder 304 fixedly installed on the frame 1. The inner cavity of the first air extraction cylinder 304 is communicated with the processing cavity 7 through a first air delivery pipe 301. A first one-way valve 303 that only allows gas to enter the processing cavity 7 from the inner cavity of the first air extraction cylinder 304 is installed on the first air delivery pipe 301. An air intake filter box 14 is installed on the frame 1, and the air in the air intake filter box 14 is filtered by a medium-efficiency filter screen and a dust removal cloth bag. The air intake filter box 14 is communicated with the inner cavity of the first air extraction cylinder 304 through a first air extraction pipe 305. A second one-way valve 306 that only allows gas to enter the inner cavity of the first air extraction cylinder 304 from the air intake filter box 14 is installed on the first air extraction pipe 305. A first piston 302 is slidably installed in the first air extraction cylinder 304, and the first piston 302 reciprocates along the first air extraction cylinder 304 under the drive of a push rod 10, thereby changing the effective volume of the inner cavity of the first air extraction cylinder 304 to achieve air extraction. Through the air extraction function of the first air extraction device 3, the air purified by the air intake filter box 14 can be sent into the processing cavity 7. Subsequently, after these gases come into contact with the rubber in the processing cavity 7, the rubber is cooled. Then these gases are extracted by the second air extraction device 4, thus achieving the purpose of cooling the rubber with air and avoiding damage to the rubber due to overheating. At the same time, the first air extraction device 3 and the second air extraction device 4 can be synchronously driven by the same push rod 10, and both the push rod 10 and the rotor 13 are driven by the same drive motor 12. Therefore, the entire operation process can be automated and has a high degree of integration.

[0031] The lengths of the first air extractor 304 and the second air extractor 403 are equal, and the diameter of the second air extractor 403 is at least twice that of the first air extractor 304. In this way, the maximum effective volume in the second air extractor 403 can be made larger than that in the first air extractor 304. Specifically, when the first air extraction device 3 and the second air extraction device 4 work synchronously, the volume of gas sent into the processing chamber 7 by the first air extraction device 3 will be smaller than the volume of gas that the second air extraction device 4 can extract from the processing chamber 7. In this way, it can be ensured that when the second air extraction device 4 extracts the gas located in the processing chamber 7, the processing chamber 7 will be in a negative pressure state, thus effectively ensuring that the harmful gas in the rubber diffuses efficiently into the processing chamber 7 when the processing chamber 7 is in a negative pressure state. Since the first air extraction device 3 and the second air extraction device 4 work synchronously, the whole process can be divided into an air extraction stage and a gas compression stage. In the air extraction stage, the first air extraction device 3 sucks external air into the inner cavity of the first air extractor 304, and at the same time, the second air extraction device 4 sucks the gas located in the processing chamber 7 into the inner cavity of the second air extractor 403. In the gas compression stage, the first air extraction device 3 presses the gas located in the inner cavity of the first air extractor 304 into the processing chamber 7, and at the same time, the second air extraction device 4 presses the gas located in the inner cavity of the second air extractor 403 into the adsorption filter 15. Therefore, in the air extraction stage, the processing chamber 7 will be pumped into a negative pressure state close to vacuum by the second air extraction device 4. In the gas compression stage, the processing chamber 7 will be injected with filtered gas by the first air extraction device 3 from the negative pressure state. At this time, since the processing chamber 7 is in a negative pressure state, the injected gas will quickly diffuse to every place in the processing chamber 7, and fully contact and exchange heat with the rubber located in the processing chamber 7 to realize the cooling of the rubber. In this way, the cooling dead angle can be effectively eliminated, and it can be avoided that when the traditional fan air cooling is used, due to the formation of local turbulence, the airflow with a lower temperature cannot normally contact the rubber, resulting in a decrease in the cooling effect, and the cooling efficiency is improved.

[0032] A thermostat 16 is installed on the first suction pipe 305, and the thermostat 16 is used to detect the temperature in the processing chamber 7 so as to negatively feedback and regulate the gas flow in the first suction pipe 305. The thermostat 16 can be a wax-type thermostat. When the temperature in the processing chamber 7 is higher than the preset temperature, the paraffin wax in the thermostat 16 will expand due to heat, thereby squeezing and changing the position of the valve core in the thermostat 16 to increase the gas flow in the first suction pipe 305, so as to improve the cooling effect of the external air on the rubber. On the contrary, when the temperature in the processing chamber 7 is lower than the preset temperature, the paraffin wax shrinks, causing the position of the valve core in the thermostat 16 to move in the reverse direction, thereby reducing the gas flow in the first suction pipe 305, so as to reduce the cooling effect of the external air on the rubber. By adopting this method, the temperature of the rubber in the processing chamber 7 can be controlled within a suitable range, so as to ensure that the rubber is efficiently processed within the preset temperature range. The thermostat 16 can also be selected as other types of thermostats 16 according to needs, or other devices that can detect the temperature in the processing chamber 7 and then change the flow rate in the first suction pipe 305, which will not be exemplified here. At the connection between the processing chamber 7 and the first air supply pipe 301, an intake chamber 9 is formed by isolation through a perforated plate 17, and at the connection between the processing chamber 7 and the second suction pipe 401, an exhaust chamber 8 is formed through the perforated plate 17. The intake chamber 9 and the exhaust chamber 8 are located at the top of the processing chamber 7. The exhaust chamber 8 and the intake chamber 9 are used to isolate the rubber to prevent the rubber from directly blocking the first air supply pipe 301 and the second suction pipe 401. The rubber will be isolated by the corresponding perforated plate 17 at the bottom of the processing chamber 7. During the normal operation of the rotor 13, the rubber cannot directly contact the perforated plate 17. Only when the processing chamber 7 is overfilled with rubber raw materials will the perforated plate 17 contact the rubber. At this time, only the excess rubber raw materials need to be taken out and then the old perforated plate 17 is removed and replaced with a new one.

[0033] In this embodiment, the internal mixer can achieve the following functions through the cooperation of the first suction device 3, the second suction device 4 and the thermostat 16 during the exhaust stage. First, the second suction device 4 can be used to extract the harmful gases located in the processing chamber 7. Then, the first suction device 3 can be used to send external air into the processing chamber 7 to cool the rubber. Finally, the thermostat 16 can be used to maintain the temperature of the rubber in the processing chamber 7 at a suitable operating temperature. And during the above process, the negative pressure generated by the second suction device 4 can also be used to efficiently extract the harmful gases located in the rubber, and the negative pressure can be used to help the air quickly diffuse to every corner of the processing chamber 7 to achieve efficient heat exchange. Therefore, it has better working efficiency.

[0034] Although the above description of the illustrative embodiments of the present application has been provided for those skilled in the art to understand the present application, the present application is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present application defined and determined by the appended claims, all applications and creations that utilize the concept of the present application are within the scope of protection.

Claims

1. A rubber processing internal mixer, comprising a frame (1), and a processing chamber (7) is formed inside the frame (1). A pair of rotors (13) for squeezing rubber by rotation are arranged in the processing chamber (7), and a drive motor (12) for driving the rotors (13) to rotate is fixed on the frame (1). It is characterized in that: A second air extraction device (4) is arranged on the frame (1). The second air extraction device (4) includes a second air extraction cylinder (403) fixedly installed on the frame (1), and an adsorption filter (15) is fixedly installed on the frame (1). The adsorption filter (15) is communicated with the inner cavity of the second air extraction cylinder (403) through a second air delivery pipe (404), and a fourth one-way valve (405) that only allows gas to flow from the inner cavity of the second air extraction cylinder (403) to the adsorption filter (15) is arranged on the second air delivery pipe (404). The processing chamber (7) is communicated with the inner cavity of the second air extraction cylinder (403) through a second air extraction pipe (401), and a third one-way valve (406) that only allows gas to enter the inner cavity of the second air extraction cylinder (403) from the processing chamber (7) is arranged on the second air extraction pipe (401). A second piston (402) is slidably installed in the second air extraction cylinder (403), and the second piston (402) reciprocates along the second air extraction cylinder (403) under the drive of a push rod (10), so as to change the effective volume of the inner cavity of the second air extraction cylinder (403) to achieve air extraction.

2. The internal mixer for rubber processing according to claim 1, wherein: A power conversion device (2) for driving the push rod (10) to reciprocate is arranged on the frame (1). The power conversion device (2) includes a speed reducer (203) fixedly installed on the frame (1), and the output end of the drive motor (12) drives the power input end of the speed reducer (203) to rotate through a belt. The power output end of the speed reducer (203) drives a rotating arm (201), and a limit matching rod (202) is fixedly installed at the end of the rotating arm (201). A rectangular sliding groove (11) is formed at the end of the push rod (10). The limit matching rod (202) is inserted into the rectangular sliding groove (11), and when the rotating arm (201) rotates, it will drive the limit matching rod (202) to reciprocate along the rectangular sliding groove (11) and drive the push rod (10) to reciprocate along the central axis of the second air extraction cylinder (403).

3. The internal mixer for rubber processing according to claim 2, wherein: A first air extraction device (3) is installed on the frame (1), and the first air extraction device (3) includes a first air extraction cylinder (304) fixedly installed on the frame (1). The inner cavity of the first air extraction cylinder (304) is communicated with the processing cavity (7) through a first air delivery pipe (301), and a first one-way valve (303) that only allows gas to enter the processing cavity (7) from the inner cavity of the first air extraction cylinder (304) is installed on the first air delivery pipe (301). An air intake filter box (14) is installed on the frame (1), and the air in the air intake filter box (14) is filtered by a medium-efficiency filter screen and a dust removal cloth bag. The air intake filter box (14) is communicated with the inner cavity of the first air extraction cylinder (304) through a first air extraction pipe (305), and a second one-way valve (306) that only allows gas to enter the inner cavity of the first air extraction cylinder (304) from the air intake filter box (14) is installed on the first air extraction pipe (305). A first piston (302) is slidably installed in the first air extraction cylinder (304), and the first piston (302) reciprocates along the first air extraction cylinder (304) driven by a push rod (10), thereby changing the effective volume of the inner cavity of the first air extraction cylinder (304) to achieve air extraction.

4. The rubber processing internal mixer according to claim 3, characterized in that: The first air extraction cylinder (304) and the second air extraction cylinder (403) have the same length, and the diameter of the second air extraction cylinder (403) is at least twice the diameter of the first air extraction cylinder (304).

5. The internal mixer for rubber processing according to claim 3, wherein: A thermostat (16) is installed on the first air extraction pipe (305), and the thermostat (16) is used to detect the temperature in the processing cavity (7) so as to negatively feedback and regulate the gas flow in the first air extraction pipe (305).

6. The internal mixer for rubber processing according to claim 3, wherein: At the connection of the processing cavity (7) and the first air delivery pipe (301), an air intake cavity (9) is formed by isolation through a mesh plate (17), and at the connection of the processing cavity (7) and the second air extraction pipe (401), an air extraction cavity (8) is formed through a mesh plate (17). The air intake cavity (9) and the air extraction cavity (8) are located at the top of the processing cavity (7).

7. The internal mixer for rubber processing according to claim 1, characterized in that: A feed inlet (6) for feeding rubber raw materials into the processing cavity (7) is opened at the top of the frame (1), and a discharge port (5) for discharging the rubber processed in the processing cavity (7) is opened at the bottom of the frame (1). Both the feed inlet (6) and the discharge port (5) are sealed by covers.

Images