Mixing process and device for rubber compound for tire production

Abstract

The invention provides a mixing process and device of a rubber compound for tire production, and relates to the technical field of tire rubber products, and the mixing process comprises the following steps: calculating according to a rubber compound formula and a target production rate to obtain a required adding speed of each raw material; putting polymer rubber and carbon black into a mixing device, and premixing based on a first mixing temperature and a first mixing time to obtain a first mixture; adding a plasticizer, an antioxidant and a vulcanizing agent into the first mixture, and carrying out main mixing based on a second mixing temperature and a second mixing time to obtain a second mixture; performing high-temperature mixing based on the third mixing temperature and the third mixing time, and discharging after the high-temperature mixing is completed to obtain a rubber material; and cooling the rubber material in a spray cooling manner. Accurate temperature control is adopted in the mixing process, premature occurrence of rubber degradation or cross-linking reaction is avoided, the mixing time of each stage is controlled through a system, it is ensured that different materials are located at the optimal combination point, and the quality of rubber is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of tire rubber products, and in particular to a mixing process and device for mixing rubber used in tire production. Background Art

[0002] In tire production, rubber compound is a semi-finished product obtained by mixing rubber with various additives, fillers, vulcanizers, etc. The quality of the rubber compound directly affects the performance of the tire (such as wear resistance, heat resistance, aging resistance, etc.). The current mixing process generally includes preliminary mixing, main mixing, and adding vulcanizers and modifiers. However, the traditional mixing process still has problems such as uneven mixing, inaccurate temperature control, and energy waste. Summary of the invention

[0003] The invention provides a mixing process and device for mixing rubber used in tire production, which are used to solve the defects of uneven mixing, inaccurate temperature control and energy waste in the traditional mixing process in the prior art.

[0004] In one aspect, the present invention provides a mixing process for a rubber compound used in tire production, comprising: Step 1: Calculate the required amount of each raw material according to the rubber compound formula and target production rate; Step 2: putting the polymer rubber and the carbon black into a mixing device and premixing them based on a first mixing temperature and a first mixing time to obtain a first mixture; Step 3: adding a plasticizer, an antioxidant, and a vulcanizer to the first mixture, and performing main mixing based on a second mixing temperature and a second mixing time to obtain a second mixture; Step 4: performing high-temperature mixing based on a third mixing temperature and a third mixing time, and discharging the material to obtain the rubber compound after the high-temperature mixing is completed; Step 5: Cool the rubber compound by spray cooling.

[0005] Preferably, the first mixing temperature in step 2 is 100-105° C., and the first mixing time is 7-8 minutes.

[0006] Preferably, the second mixing temperature in step 3 is 140-145° C., and the second mixing time is 12-13 minutes.

[0007] Preferably, the third mixing temperature in step 4 is 150-170° C., and the third mixing time is 6-7 minutes.

[0008] Preferably, step 5 comprises: Step 51: Obtaining environmental parameters and material parameters of the rubber compound cooling process, the environmental parameters include: ambient temperature, ambient humidity and ventilation rate, and the material parameters include: spray particle diameter, rubber compound temperature, coolant temperature, coolant density and specific heat capacity of the coolant; Step 52: Based on the environmental parameters and material parameters of the rubber compound cooling process, the spray amount of the spray cooling is adjusted in real time; ; Wherein, V is the real-time spray volume; is the current actual ventilation volume per unit time; is the ventilation volume per unit time corresponding to standard conditions; ln is the logarithmic function with e as the base; e is a natural constant; is the actual spray particle diameter; is the maximum allowable value of the spray particle diameter; is the actual environmental relative humidity value; is the relative humidity value of the environment corresponding to the standard conditions; h is the convection heat transfer coefficient between the rubber and the air; A is the surface area of ​​the rubber; is the actual temperature of the rubber compound; is the current ambient temperature; is the Stefan-Boltzmann constant; is the unit time; C is the specific heat capacity of the coolant used in spray cooling; The density of the coolant used for spray cooling; The actual temperature of the coolant used for spray cooling.

[0009] On the other hand, the present invention also provides a mixing device for rubber compound used in tire production, comprising a supporting base plate, the upper surface of the supporting base plate is fixedly connected with a mounting bracket, a cooling box, a water storage tank and a temperature regulating box, a mixing tank is fixedly mounted on the mounting bracket, the cooling box is arranged below the mixing tank, a feed port is arranged on the mixing tank, a mixing assembly is arranged in the mixing tank, the mixing tank and the temperature regulating box are connected through two air pipes, a driving motor is fixedly mounted on the top surface of the mounting bracket, the driving motor is used to drive the mixing assembly, the discharge port of the mixing tank is connected with the inner cavity of the cooling box, and the water storage tank is connected with the cooling box through a water pipe.

[0010] Preferably, the mixing assembly comprises a driving shaft, the driving shaft is fixedly connected to the output end of the driving motor, and a plurality of stirring blades are fixedly connected to the driving shaft in the circumferential direction.

[0011] Preferably, a temperature control module is provided in the temperature regulating box, and the temperature control module includes: Air circulation pipeline, used to realize the circulation of air in the test chamber; A plurality of temperature sensors are evenly arranged in the air circulation pipeline and are used to detect the gas temperature in the air circulation pipeline; A refrigeration element is arranged inside the air circulation pipeline and is used to cool the air in the air circulation pipeline; The heating element is arranged inside the air circulation pipeline and is used to heat the air in the air circulation pipeline.

[0012] Preferably, a cooling component is provided in the cooling box, and the cooling component includes a cooling basin, the side walls of the cooling basin are fixedly connected to a support frame, the inner bottom surface of the cooling box below the cooling basin is fixedly connected to a support pad, two groups of vertically arranged spring rod assemblies are symmetrically arranged on the left and right sides of the support pad, the fixed end of the spring rod assembly is fixedly connected to the inner bottom surface of the cooling box, the movable end of the spring rod assembly is fixedly connected to the lower bottom surface of the support frame, two inclined blocks 1 are symmetrically fixedly connected to the upper surface of the support frame, the upper surface of the inclined block 1 is provided with an inclined surface 1, the height of the inclined surface 1 close to the cooling basin is greater than the height of the side away from the cooling basin, and a group of spray control assemblies is correspondingly arranged above each inclined block 1, the spray The control component includes a horizontally arranged sliding track, which is fixedly connected to the top surface of the cooling box, a sliding groove 1 is arranged on the bottom surface of the sliding track, a horizontally arranged mounting rod is fixedly connected in the sliding groove 1, a sliding block that slides along the left and right directions is slidably connected to the mounting rod, a spring 1 is fixedly connected between the sliding block and the inner wall of the sliding groove 1 away from the cooling basin, a connecting plate is fixedly connected to the lower surface of the sliding block, an inclined block 2 is fixedly connected to the lower end of the connecting plate, an inclined surface 2 is arranged on the lower surface of the inclined block 2, an inclined plane 2 is arranged, the inclined plane 1 is in contact with the inclined plane 2, a horizontally arranged spray rack is fixedly connected to the side wall of the connecting plate, a plurality of spray nozzles are installed on the spray rack, and the spray nozzles are connected to the water pipe through a water hose.

[0013] Preferably, ventilation holes are provided on the left and right side walls of the cooling box, and a plurality of adjustment blades are rotatably connected in the ventilation holes, and a control column is fixedly connected to the side of the adjustment blade close to the inner cavity of the cooling box, and two groups of adjustment components are symmetrically arranged in the cooling box, and the adjustment components include a mounting seat, and the mounting seat is fixedly connected to the bottom surface of the cooling box, and a sliding hole is provided on the upper surface of the mounting seat, and a control rod is slidably connected in the sliding hole along the up and down directions, and two springs are fixedly connected between the lower bottom surface of the control rod and the inner bottom surface of the sliding hole, and the control rod is fixedly connected to the control frame, and a plurality of control buckles are fixedly connected to the side walls of the control frame, and the control buckles correspond to the adjustment blades one by one, and each control buckle is provided with two sliding grooves, and the control column slides in the two sliding grooves.

[0014] Compared with the prior art, the present invention has the following beneficial effects: A staged mixing method is adopted. First, the primary mixed raw materials are mixed to form a preliminary dispersed system; then other auxiliary materials such as cross-linking agents and fillers are added. By precisely controlling the mixing time and temperature, the components are fully dispersed, the uniformity of the colloid components is improved, and thus the quality of the colloid is improved. By precisely controlling the mixing time of each stage, rubber degradation caused by excessive mixing is avoided.

[0015] Precise temperature control is used during the mixing process. Reasonable temperature control can avoid rubber degradation or premature cross-linking reaction. The mixing time of each stage is controlled by the system to ensure the best bonding point between different materials and further improve the quality of the colloid.

[0016] When cooling the colloid, the ambient temperature can be reduced to the maximum extent by adjusting the spray volume at any time, thereby effectively improving the cooling efficiency of the colloid and avoiding the degradation of the colloid due to long-term high temperature. This is beneficial to maintaining the excellent physical and chemical properties of the colloid. At the same time, increasing the cooling rate of the colloid is beneficial to improving the production efficiency of the colloid.

[0017] By controlling the spray volume at any time, while ensuring an excellent cooling rate of the colloid, it avoids the situation where the spray volume is too large and the droplets liquefy on the colloid surface when the colloid temperature is low, resulting in uneven cooling of the colloid, and then causing the quality of the colloid to decline, thus ensuring the stability of the colloid quality.

[0018] When mixing the colloid, the mixed raw materials are put into the mixing tank through the feed port, and the mixed materials are stirred by controlling the rotation of the driving shaft through the driving motor to complete the mixing. The temperature inside the mixing tank is controlled by circulating the air inside the mixing tank. The temperature inside the mixing tank is controlled by controlling the temperature of the circulating air, thereby improving the uniformity of the temperature distribution inside the mixing tank. By accurately controlling the temperature of the circulating air, the accuracy of temperature control is improved, thereby improving the quality of the produced colloid.

[0019] After the mixing is completed, the colloid falls into the cooling basin through the discharge port. As the mass of the colloid in the cooling basin increases, the spring rod assembly is compressed, so that the cooling basin moves downward, thereby pressing the control frame downward, compressing the spring two, and rotating the adjusting fan blades, thereby increasing the ventilation volume of the cooling box and improving the heat dissipation effect of the colloid. At the same time, the slider one descends with the support frame. Under the action of the spring one, the sliding block moves toward the cooling basin, so that the spray rack reaches the top of the cooling basin, which is convenient for spraying and cooling the colloid. After the cooling of the colloid is completed, the staff opens the cooling box and takes out the cooled colloid.

[0020] When the cooling box is not cooling, the vents are closed by adjusting the fan blades to prevent external dust from entering the cooling box through the vents, thereby ensuring the cleanliness of the cooling box and preventing dust from adhering to the colloid and causing a decrease in the quality of the colloid. When cooling is in progress, the fan blades are opened and adjusted to increase the ventilation volume inside the cooling box, thereby improving the heat dissipation effect on the colloid and, at the same time, increasing the evaporation amount of the spray, further improving the heat dissipation effect on the colloid. When the cooling basin is in an unloaded state, the spray rack is not above the cooling basin, thereby preventing the colloid from contacting the spray rack during the process of falling into the cooling basin, thereby causing damage to the spray rack and loss of the colloid. When a sufficient amount of colloid has accumulated in the cooling basin, the spray rack automatically reaches the top of the cooling basin, thereby improving the spray cooling effect. This process does not require additional operation by the staff, is easy to operate, and reduces the work intensity of the staff. The setting of the support pad ensures that the descending stroke of the cooling basin will not exceed the predetermined stroke, thereby reducing the failure rate of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are 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.

[0022] Figure 1 It is a schematic structural diagram of a mixing device of the present invention; Figure 2 It is a schematic diagram of the main structure of the mixing device of the present invention; Figure 3 It is a structural schematic diagram of a cooling box of the present invention; Figure 4 yes Figure 3 The enlarged schematic diagram at A in the middle; Figure 5 yes Figure 3 Enlarged schematic diagram of point B in the middle.

[0023] Reference numerals: 1. Support base plate; 2. Mounting bracket; 3. Cooling box; 4. Water storage tank; 5. Temperature control box; 6. Mixing tank; 7. Feed inlet; 8. Air pipe; 9. Drive motor; 10. Discharge port; 11. Water pipe; 12. Drive shaft; 13. Mixing blade; 14. Cooling basin; 15. Support frame; 16. Support pad; 17. Spring rod assembly; 171. Rod seat; 172. Mounting hole; 173. Rod core; 174. Spring three; 18. Oblique block one; 19. Oblique Surface one; 20, sliding track; 21, sliding groove one; 22, mounting rod; 23, sliding block; 24, spring one; 25, connecting plate; 26, inclined block two; 27, inclined surface two; 28, spray rack; 29, spray nozzle; 30, water hose; 31, vent; 32, adjusting fan blades; 33, control column; 34, mounting seat; 35, sliding hole; 36, control rod; 37, control rack; 38, control buckle; 39, sliding groove two; 40, spring two. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0026] Example 1 The embodiment of the present invention provides a mixing process of a rubber compound used in tire production, comprising: Step 1: Calculate the required amount of each raw material according to the rubber compound formula and target production rate; Step 2: putting the polymer rubber and the carbon black into a mixing device and premixing them based on a first mixing temperature and a first mixing time to obtain a first mixture; Step 3: adding a plasticizer, an antioxidant, and a vulcanizer to the first mixture, and performing main mixing based on a second mixing temperature and a second mixing time to obtain a second mixture; Step 4: performing high-temperature mixing based on a third mixing temperature and a third mixing time, and discharging the material to obtain the rubber compound after the high-temperature mixing is completed; Step 5: Cool the rubber compound by spray cooling.

[0027] Preferably, the first mixing temperature in step 2 is 100-105° C., and the first mixing time is 7-8 minutes.

[0028] Preferably, the second mixing temperature in step 3 is 140-145° C., and the second mixing time is 12-13 minutes.

[0029] Preferably, the third mixing temperature in step 4 is 150-170° C., and the third mixing time is 6-7 minutes.

[0030] The beneficial effects of the above technical solution are: A staged mixing method is adopted. First, the primary mixed raw materials are mixed to form a preliminary dispersed system; then other auxiliary materials such as cross-linking agents and fillers are added. By precisely controlling the mixing time and temperature, the components are fully dispersed, the uniformity of the colloid components is improved, and thus the quality of the colloid is improved. By precisely controlling the mixing time of each stage, rubber degradation caused by excessive mixing is avoided.

[0031] Precise temperature control is used during the mixing process. Reasonable temperature control can avoid rubber degradation or premature cross-linking reaction. The mixing time of each stage is controlled by the system to ensure the best bonding point between different materials and further improve the quality of the colloid.

[0032] Example 2 Based on Example 1, step 5 includes: Step 51: Obtaining environmental parameters and material parameters of the rubber compound cooling process, the environmental parameters include: ambient temperature, ambient humidity and ventilation rate, and the material parameters include: spray particle diameter, rubber compound temperature, coolant temperature, coolant density and specific heat capacity of the coolant; Step 52: Based on the environmental parameters and material parameters of the rubber compound cooling process, the spray amount of the spray cooling is adjusted in real time; ; Wherein, V is the real-time spray volume; is the current actual ventilation volume per unit time; is the ventilation volume per unit time corresponding to standard conditions; ln is the logarithmic function with e as the base; e is a natural constant; is the actual spray particle diameter; is the maximum allowable value of the spray particle diameter; is the actual environmental relative humidity value; is the relative humidity value of the environment corresponding to the standard conditions; h is the convection heat transfer coefficient between the rubber and the air; A is the surface area of ​​the rubber; is the actual temperature of the rubber compound; is the current ambient temperature; is the Stefan-Boltzmann constant; is the unit time; C is the specific heat capacity of the coolant used in spray cooling; The density of the coolant used for spray cooling; The actual temperature of the coolant used for spray cooling.

[0033] The beneficial effects of the above technical solution are: When cooling the colloid, the ambient temperature can be reduced to the maximum extent by adjusting the spray volume at any time, thereby effectively improving the cooling efficiency of the colloid and avoiding the degradation of the colloid due to long-term high temperature. This is beneficial to maintaining the excellent physical and chemical properties of the colloid. At the same time, increasing the cooling rate of the colloid is beneficial to improving the production efficiency of the colloid.

[0034] By controlling the spray volume at any time, while ensuring an excellent cooling rate of the colloid, it avoids the situation where the spray volume is too large and the droplets liquefy on the colloid surface when the colloid temperature is low, resulting in uneven cooling of the colloid, and then causing the quality of the colloid to decline, thus ensuring the stability of the colloid quality.

[0035] Example 3 An embodiment of the present invention also provides a mixing device for a rubber compound used in tire production, which is applied to a mixing process of a rubber compound used in tire production as described in any one of Examples 1-2, and includes a supporting base plate 1, and an upper surface of the supporting base plate 1 is fixedly connected with a mounting bracket 2, a cooling box 3, a water storage tank 4 and a temperature regulating box 5, a mixing tank 6 is fixedly mounted on the mounting bracket 2, the cooling box 3 is arranged below the mixing tank 6, a feed port 7 is arranged on the mixing tank 6, a mixing assembly is arranged in the mixing tank 6, the mixing tank 6 is connected to the temperature regulating box 5 through two air pipes 8, a driving motor 9 is fixedly mounted on the top surface of the mounting bracket 2, and the driving motor 9 is used to drive the mixing assembly, a discharge port 10 of the mixing tank 6 is connected to the inner cavity of the cooling box 3, and the water storage tank 4 is connected to the cooling box 3 through a water pipe 11.

[0036] Preferably, the mixing assembly includes a driving shaft 12 , which is fixedly connected to the output end of the driving motor 9 , and a plurality of stirring blades 13 are fixedly connected to the driving shaft 12 in the circumferential direction.

[0037] Preferably, a temperature control module is provided in the temperature regulating box 5, and the temperature control module includes: Air circulation pipeline, used to realize the circulation of air in the test chamber; A plurality of temperature sensors are evenly arranged in the air circulation pipeline and are used to detect the gas temperature in the air circulation pipeline; A refrigeration element is arranged inside the air circulation pipeline and is used to cool the air in the air circulation pipeline; The heating element is arranged inside the air circulation pipeline and is used to heat the air in the air circulation pipeline.

[0038] Preferably, a cooling component is provided in the cooling box 3, and the cooling component includes a cooling basin 14, and the side wall of the cooling basin 14 is fixedly connected to a support frame 15, and a support pad 16 is fixedly connected to the inner bottom surface of the cooling box 3 below the cooling basin 14, and two groups of vertically arranged spring rod assemblies 17 are symmetrically provided on the left and right sides of the support pad 16, and the fixed end of the spring rod assembly 17 is fixedly connected to the inner bottom surface of the cooling box 3, and the movable end of the spring rod assembly 17 is fixedly connected to the lower bottom surface of the support frame 15, and two inclined blocks 18 are symmetrically fixedly connected to the upper surface of the support frame 15, and an inclined surface 19 is provided on the upper surface of the inclined block 18, and the height of the inclined surface 19 on the side close to the cooling basin 14 is greater than the height on the side away from the cooling basin 14, and a group of spray control components are correspondingly provided above each inclined block 18, and the spray control component includes a horizontal A sliding track 20 is provided, and the sliding track 20 is fixedly connected to the top surface of the cooling box 3. A sliding groove 21 is provided on the bottom surface of the sliding track 20. A horizontally arranged mounting rod 22 is fixedly connected in the sliding groove 21. A sliding block 23 that slides along the left and right directions is slidably connected to the mounting rod 22. A spring 24 is fixedly connected between the sliding block 23 and the inner wall of the sliding groove 21 on the side away from the cooling basin 14. A connecting plate 25 is fixedly connected to the lower surface of the sliding block 23. An inclined block 26 is fixedly connected to the lower end of the connecting plate 25. An inclined plane 27 is provided on the lower surface of the inclined block 26. The inclined plane 19 contacts the inclined plane 27. A horizontally arranged spray rack 28 is fixedly connected to the side wall of the connecting plate 25. A plurality of spray nozzles 29 are installed on the spray rack 28. The spray nozzles 29 are connected to the water pipe 11 through a water hose 30.

[0039] Preferably, ventilation holes 31 are provided on the left and right side walls of the cooling box 3, and a plurality of adjusting blades 32 are rotatably connected in the ventilation holes 31, and a control column 33 is fixedly connected to the side of the adjusting blade 32 close to the inner cavity of the cooling box 3, and two groups of adjusting components are symmetrically provided in the cooling box 3, and the adjusting components include a mounting seat 34, and the mounting seat 34 is fixedly connected to the inner bottom surface of the cooling box 3, and a sliding hole 35 is provided on the upper surface of the mounting seat 34, and a control rod 36 is slidably connected in the sliding hole 35 along the up and down directions, and a spring 2 40 is fixedly connected between the lower bottom surface of the control rod 36 and the inner bottom surface of the sliding hole 35, and the control rod 36 is fixedly connected to the control frame 37, and a plurality of control buckles 38 are fixedly connected to the side wall of the control frame 37, and the control buckles 38 correspond to the adjusting blades 32 one by one, and each control buckle 38 is provided with a sliding groove 2 39, and the control column 33 slides in the sliding groove 2 39.

[0040] In this embodiment, the spring rod assembly 17 includes a rod seat 171, which is fixedly connected to the bottom surface of the cooling box 3. A mounting hole 172 is provided in the rod seat 171. A rod core 173 is slidably connected in the mounting hole 172 along the up and down directions. A spring three 174 is fixedly connected between the rod core 173 and the inner wall of the mounting hole 172.

[0041] The beneficial effects of the above technical solution are: When mixing the colloid, the mixed raw materials are put into the mixing tank 6 through the feed port 7, and the driving motor 9 controls the driving shaft 12 to rotate to stir the mixed materials to complete the mixing. The temperature inside the mixing tank 6 is controlled by circulating the air inside the mixing tank 6. The temperature inside the mixing tank 6 is controlled by controlling the temperature of the circulating air, thereby improving the uniformity of the temperature distribution inside the mixing tank 6. By accurately controlling the temperature of the circulating air, the accuracy of the temperature control is improved, thereby improving the quality of the produced colloid.

[0042] After the mixing is completed, the colloid falls into the cooling basin 14 through the discharge port 10. As the mass of the colloid in the cooling basin 14 increases, the spring rod assembly 17 is compressed, so that the cooling basin 14 moves downward, thereby pressing the control frame 37 downward, so that the spring 2 40 is compressed, so that the adjusting fan blade 32 rotates, thereby increasing the ventilation volume of the cooling box 3 and improving the heat dissipation effect of the colloid. At the same time, the slider 1 descends with the support frame 15. Under the action of the spring 1 24, the sliding block 23 moves toward the cooling basin 14, so that the spray rack 28 reaches the top of the cooling basin 14, which is convenient for spraying and cooling the colloid. After the cooling of the colloid is completed, the staff opens the cooling box 3 to take out the cooled colloid.

[0043] When the cooling box 3 is not cooling, the vent 31 is closed by adjusting the fan blades 32 to prevent external dust from entering the cooling box 3 along the vent 31, thereby ensuring the cleanliness of the cooling box 3 and preventing dust from adhering to the colloid, thereby reducing the quality of the colloid. When cooling, the fan blades 32 are opened to increase the ventilation volume inside the cooling box 3, thereby improving the heat dissipation effect on the colloid, and at the same time increasing the evaporation amount of the spray, thereby further improving the heat dissipation effect on the colloid. When the cooling basin 14 is in an unloaded state, the spray rack 28 is not above the cooling basin 14, thereby preventing the colloid from contacting the spray rack 28 during the process of falling into the cooling basin 14, thereby preventing the damage to the spray rack 28 and the loss of the colloid. When a sufficient amount of colloid is accumulated in the cooling basin 14, the spray rack 28 automatically reaches the top of the cooling basin 14, thereby improving the effect of spray cooling. The process does not require additional operation by the staff, is easy to operate, and reduces the work intensity of the staff. By setting the support pad 16, it is ensured that the descending stroke of the cooling basin 14 will not exceed the predetermined stroke, thereby reducing the failure rate of the device.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A mixing process for a rubber compound used in tire production, characterized in that: include: Step 1: Calculate the required amount of each raw material according to the rubber compound formula and target production rate; Step 2: placing the polymer rubber and the carbon black in a mixing device and premixing them based on a first mixing temperature and a first mixing time to obtain a first mixture; Step 3: adding a plasticizer, an antioxidant, and a vulcanizer to the first mixture, and performing main mixing based on a second mixing temperature and a second mixing time to obtain a second mixture; Step 4: performing high-temperature mixing based on a third mixing temperature and a third mixing time, and discharging the material to obtain the rubber compound after the high-temperature mixing is completed; Step 5: Cool the rubber compound by spray cooling.

2. The mixing process of the rubber compound used in tire production according to claim 1, characterized in that: The first mixing temperature in step 2 is 100-105° C., and the first mixing time is 7-8 minutes.

3. The mixing process of the rubber compound used in tire production according to claim 1, characterized in that: The second mixing temperature in step 3 is 140-145° C., and the second mixing time is 12-13 minutes.

4. The mixing process of the rubber compound used in tire production according to claim 1, characterized in that: The third mixing temperature in step 4 is 150-170° C., and the third mixing time is 6-7 minutes.

5. The mixing process of the rubber compound used in tire production according to claim 1, characterized in that: Step 5 includes: Step 51: Obtaining environmental parameters and material parameters of the rubber compound cooling process, the environmental parameters include: ambient temperature, ambient humidity and ventilation rate, and the material parameters include: spray particle diameter, rubber compound temperature, coolant temperature, coolant density and specific heat capacity of the coolant; Step 52: Based on the environmental parameters and material parameters of the rubber compound cooling process, the spray amount of the spray cooling is adjusted in real time; ; Wherein, V is the real-time spray volume; is the current actual ventilation volume per unit time; is the ventilation volume per unit time corresponding to standard conditions; ln is the logarithmic function with e as the base; e is a natural constant; is the actual spray particle diameter; is the maximum allowable value of the spray particle diameter; is the actual environmental relative humidity value; is the relative humidity value of the environment corresponding to the standard conditions; h is the convection heat transfer coefficient between the rubber and the air; A is the surface area of ​​the rubber; is the actual temperature of the rubber compound; is the current ambient temperature; is the Stefan-Boltzmann constant; is the unit time; C is the specific heat capacity of the coolant used in spray cooling; The density of the coolant used for spray cooling; The actual temperature of the coolant used for spray cooling.

6. A mixing device for a rubber compound used in tire production, applied to a mixing process for a rubber compound used in tire production as claimed in any one of claims 1 to 5, characterized in that: The invention comprises a supporting bottom plate (1), wherein the upper surface of the supporting bottom plate (1) is fixedly connected with a mounting bracket (2), a cooling box (3), a water storage tank (4) and a temperature regulating box (5), a mixing tank (6) is fixedly mounted on the mounting bracket (2), the cooling box (3) is arranged below the mixing tank (6), a material feed port (7) is arranged on the mixing tank (6), a mixing assembly is arranged in the mixing tank (6), the mixing tank (6) and the temperature regulating box (5) are connected via two air pipes (8), a driving motor (9) is fixedly mounted on the upper top surface of the mounting bracket (2), the driving motor (9) is used to drive the mixing assembly, a material discharge port (10) of the mixing tank (6) is connected with the inner cavity of the cooling box (3), and the water storage tank (4) and the cooling box (3) are connected via a water pipe (11).

7. A mixing device for rubber compound used in tire production according to claim 6, characterized in that: The mixing assembly comprises a driving shaft (12), which is fixedly connected to the output end of the driving motor (9), and a plurality of stirring blades (13) are fixedly connected to the driving shaft (12) in the circumferential direction.

8. A mixing device for rubber compound used in tire production according to claim 6, characterized in that: A temperature control module is arranged in the temperature regulating box (5), and the temperature control module comprises: Air circulation pipeline, used to realize the circulation of air in the test chamber; A plurality of temperature sensors are evenly arranged in the air circulation pipeline and are used to detect the gas temperature in the air circulation pipeline; A refrigeration element is arranged inside the air circulation pipeline and is used to cool the air in the air circulation pipeline; The heating element is arranged inside the air circulation pipeline and is used to heat the air in the air circulation pipeline.

9. A mixing device for a rubber compound used in tire production according to claim 6, characterized in that: A cooling component is arranged in the cooling box (3), and the cooling component comprises a cooling basin (14), the side wall of the cooling basin (14) is fixedly connected to a support frame (15), a support pad (16) is fixedly connected to the inner bottom surface of the cooling box (3) below the cooling basin (14), two groups of vertically arranged spring rod components (17) are symmetrically arranged on the left and right sides of the support pad (16), the fixed end of the spring rod component (17) is fixedly connected to the inner bottom surface of the cooling box (3), the movable end of the spring rod component (17) is fixedly connected to the lower bottom surface of the support frame (15), two inclined blocks (18) are symmetrically fixedly connected to the upper surface of the support frame (15), the upper surface of the inclined block (18) is provided with an inclined surface (19), the height of the inclined surface (19) on the side close to the cooling basin (14) is greater than the height on the side away from the cooling basin (14), and a group of spray control components is correspondingly arranged above each inclined block (18), and the spray control component comprises a horizontally arranged sliding track (2 0), the sliding track (20) is fixedly connected to the top surface of the cooling box (3), the bottom surface of the sliding track (20) is provided with a sliding groove (21), a mounting rod (22) arranged horizontally is fixedly connected in the sliding groove (21), a sliding block (23) sliding in the left and right directions is slidably connected to the mounting rod (22), a spring (24) is fixedly connected between the sliding block (23) and the inner wall of the sliding groove (21) away from the cooling basin (14), and the sliding block (23) is fixedly connected to the inner wall of the sliding groove (21) away from the cooling basin (14), and the sliding block (23) is fixedly connected to the inner wall of the sliding groove (21) away from the cooling basin (14). ) is fixedly connected to the lower surface of the connecting plate (25), the lower end of the connecting plate (25) is fixedly connected to the second inclined block (26), the lower surface of the second inclined block (26) is provided with a second inclined surface (27), the first inclined surface (19) is in contact with the second inclined surface (27), the side wall of the connecting plate (25) is fixedly connected to a horizontally arranged spray rack (28), a plurality of spray nozzles (29) are installed on the spray rack (28), and the spray nozzles (29) are connected to the water pipe (11) through a water hose (30).

10. A mixing device for rubber compound used in tire production according to claim 9, characterized in that: The left and right side walls of the cooling box (3) are provided with ventilation holes (31), a plurality of adjustment blades (32) are rotatably connected in the ventilation holes (31), a control column (33) is fixedly connected to the side of the adjustment blades (32) close to the inner cavity of the cooling box (3), two groups of adjustment components are symmetrically arranged in the cooling box (3), and the adjustment components include a mounting seat (34), the mounting seat (34) is fixedly connected to the inner bottom surface of the cooling box (3), and a sliding hole (35) is arranged on the upper surface of the mounting seat (34), and the sliding hole (35) A control rod (36) is slidably connected to the inner edge in the up-down direction, a spring (40) is fixedly connected between the lower bottom surface of the control rod (36) and the inner bottom surface of the sliding hole (35), the control rod (36) is fixedly connected to the control frame (37), a plurality of control buckles (38) are fixedly connected to the side wall of the control frame (37), the control buckles (38) correspond to the adjustment blades (32) one by one, each control buckle (38) is provided with a sliding groove (39), and the control column (33) slides in the sliding groove (39).

Images