Extrusion molding and mixing all-in-one machine for rubber product production

Abstract

The invention relates to the technical field of rubber product production equipment, and particularly discloses an extrusion molding and mixing all-in-one machine for rubber product production, which comprises a machine barrel and a control unit, and the hollow shaft is rotationally arranged in the machine barrel, and the outer surface of the hollow shaft is sequentially connected with a first conveying blade, a second conveying blade and a third conveying blade which are each of a hollow structure. According to the extrusion molding and mixing all-in-one machine for rubber product production, through a combined heating structure of the hollow shaft and the hollow blades, synchronous preheating is conducted from the middle of a rubber material, internal and external temperature balance is achieved in cooperation with heating of the outer wall of the machine barrel, the situation that a rubber material ball is cooked outside and internally generated inside is avoided, and meanwhile air can be exhausted and bubbles can be eliminated through reciprocating extrusion of the bubble removing push plate; therefore, the discharge amount of waste materials is greatly reduced, the waste of raw materials is greatly reduced, the production cost is saved, the time required from startup to production of qualified products is shortened, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of rubber product manufacturing equipment technology, specifically to an integrated extrusion mixing machine for rubber product manufacturing. Background Technology

[0002] In the industrial production of rubber products, integrated extrusion mixing machines have become core equipment for processing rubber products such as tires, seals, and pipes because they can achieve continuous mixing, plasticizing, and extrusion molding of rubber compounds in one integrated process, significantly improving production efficiency and product consistency. The working principle of this type of equipment is to heat the barrel through heating elements on its outer wall, while simultaneously driving the screw to rotate at high speed. This causes the rubber compound to undergo shearing, extrusion, and heat conduction in the gap between the barrel and the screw, completing plasticization before being extruded and molded from the die head.

[0003] During the preheating process at startup, the outer wall of the barrel is directly heated by the heating elements, resulting in a rapid temperature rise. However, the center of the screw experiences slower heat transfer and a lower temperature. At this time, the rubber compound softens quickly upon contact with the inner wall of the barrel, but softens insufficiently upon contact with the screw, forming clumps of rubber compound with uneven plasticization. These clumps, after extrusion, exhibit defects such as rough surfaces and internal inclusions. Furthermore, air may be incorporated into the rubber compound, or low-molecular-weight volatiles may be released during plasticization. Insufficient filling of the rubber compound at startup prevents effective gas expulsion from the vents, leading to air bubbles inside the product. This results in a significant amount of waste material needing to be discharged initially to meet subsequent processing requirements. This not only wastes raw materials but also prolongs the time required to produce qualified products, reducing production efficiency.

[0004] Therefore, an integrated extrusion mixing machine for rubber product manufacturing was designed to solve the above-mentioned technical problems. Summary of the Invention

[0005] This invention provides an integrated extrusion mixing machine for rubber product manufacturing, aiming to solve the problem of waste of rubber raw materials caused by uneven temperature conduction between the screw and barrel and inconsistent plasticization of the rubber compound during the preheating stage.

[0006] The present invention provides an integrated extrusion mixing machine for rubber product manufacturing, comprising: barrel and control unit; A hollow shaft is rotatably installed inside the barrel. The outer surface of the hollow shaft is sequentially connected to three hollow conveying blades: one, two, and three. Each of the three conveying blades has a flow-diverting structure between itself and the hollow shaft. The flow-diverting structure is used to regulate the flow of heat transfer medium to the three conveying blades. The flow-diverting structure includes a water inlet pipe connected to the hollow shaft and a solenoid valve. The solenoid valve is electrically connected to a control unit, which controls the opening and closing of the solenoid valve. One end of the water inlet pipe on each of the three flow-diverting structures is connected to the hollow shaft. The defoaming structure is located between the flow diversion and the barrel, and is used to remove air bubbles from the rubber compound. A drive unit is connected to a hollow shaft. A rotary joint is connected to the drive unit. The rotary joint is connected to one end of the hollow shaft, and a rotary joint is connected to the other end of the hollow shaft. The heat transfer medium conveying structure is connected to rotary joint one and rotary joint two. The heat transfer medium conveying structure is used to convey the heat transfer medium.

[0007] Preferably, the diversion and disconnection structure further includes a protective cylinder, with the solenoid valve disposed inside the protective cylinder, and the ends of the conveying blades one, two, and three away from the inlet pipe are all connected to a return pipe.

[0008] Preferably, the defoaming structure includes a moving ring, a guide ring, a defoaming push plate, a limiting rod, and a guide assembly. The moving ring is slidably disposed on the outer surface of the protective cylinder. The guide ring is installed on the inner wall of the cylinder and includes two spiral semi-rings connected end to end. The defoaming push plate and the limiting rod are both connected to the outer surface of the moving ring. There are multiple defoaming push plates and two limiting rods. The guide ring is located between the two limiting rods. The guide assembly is disposed between the moving ring and the protective cylinder and is used to guide the moving ring.

[0009] Preferably, the heat transfer medium conveying structure includes a conveying pump, a heat transfer medium storage tank, a heating element, and a temperature monitoring element. The outlet of the conveying pump is connected to a rotary joint one via a pipe. A flow rate monitoring element electrically connected to a control unit is connected to the pipe between the conveying pump and the rotary joint one. The inlet of the conveying pump is connected to the heat transfer medium storage tank via a pipe. The heating element and the temperature monitoring element are both installed on the heat transfer medium storage tank. The heat transfer medium storage tank is connected to the rotary joint two via a pipe.

[0010] Preferably, a conveying cylinder is connected to the machine barrel, a conveying auger is provided inside the conveying cylinder, a mixing box is connected to the conveying cylinder, and a stirring structure is provided on the mixing box.

[0011] Preferably, the guiding assembly includes a guide plate and a guide groove. The guide plate is installed on the outer surface of the protective cylinder, and the guide groove is formed on the inner wall of the moving ring. There is at least one guide plate and one guide groove. A portion of the guide plate is located inside the guide groove and is slidably connected to the guide groove.

[0012] Preferably, a second protective cylinder is installed on the inner wall of the barrel, and the second rotary joint is located inside the second protective cylinder.

[0013] Preferably, the control unit controls the on / off time of the solenoid valve based on the following formula: Where in the formula This represents the on / off time of the nth solenoid valve. This represents the mass of the nth segment of the rubber compound. This represents the specific heat capacity of the rubber compound. This represents the target temperature rise difference for the nth segment. Represents the flow rate of the heat-conducting medium. Represents the density of the heat-conducting medium. The specific heat capacity of a heat-conducting medium. The inlet and outlet temperature difference represents the heat transfer medium. This represents the heat transfer efficiency of the nth segment. Represents the length correction factor. This represents the effective length of the nth conveyor blade. This represents the feed rate correction factor.

[0014] The beneficial effects of this invention are: 1. The combined heating structure of hollow shaft and hollow blades allows for simultaneous preheating from the center of the rubber compound. Combined with heating of the outer wall of the barrel, this achieves a balanced internal and external temperature, preventing the rubber compound from being overcooked on the outside and undercooked on the inside. At the same time, the reciprocating extrusion of the defoaming pusher can expel air and eliminate bubbles, thereby greatly reducing the amount of waste material discharged, significantly reducing raw material waste, saving production costs, and reducing the time required from start-up to the production of qualified products, thus improving production efficiency.

[0015] 2. By leveraging the linkage between the diversion and disconnection structure and the control unit, the preheating rhythm of each section can be precisely controlled according to the process requirements of the feeding section, compression section, and melting section. Temperature gradient adaptation is achieved through the sequential on / off switching of solenoid valves, thereby improving the preheating effect and resulting in better quality of the finished product. Attached Figure Description

[0016] Figure 1 This is a first-view structural schematic diagram of the present invention.

[0017] Figure 2 This is a schematic diagram of the second perspective structure of the present invention.

[0018] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0019] Figure 4 This is the present invention. Figure 3 A magnified structural diagram of point A in the diagram.

[0020] Figure 5 This is a cross-sectional structural diagram of the barrel and its connecting components of the present invention.

[0021] Figure 6 This is the present invention. Figure 5 A magnified structural diagram at point B in the middle.

[0022] Figure 7 This is a schematic diagram of the hollow shaft of the present invention.

[0023] Figure 8 This is a schematic diagram of the protective cylinder and defoaming structure of the present invention.

[0024] Figure 9 This is a schematic diagram of the structure of the protective cylinder of the present invention.

[0025] Figure 10 This is a schematic diagram of the moving ring structure of the present invention.

[0026] Figure label: 10. Machine barrel; 11. Control unit; 12. Die head; 13. Guide ring; 14. Machine base; 15. Machine frame; 16. Heating element; 17. Protective cylinder II; 20. Mixing structure; 21. Mixing box; 22. Stirring structure; 23. Conveying cylinder; 24. Conveying auger; 30. Hollow shaft; 31. Conveying blade I; 32. Conveying blade II; 33. Conveying blade III; 34. Rotary joint I; 35. Rotary joint II; 36. Drive component; 37. Support frame; 40. Heat transfer medium conveying structure; 41. Conveying pump; 42. Heat transfer medium storage tank; 43. Heating element; 44. Temperature monitoring element; 50. Protective cylinder I; 51. Water inlet pipe; 52. Solenoid valve; 53. Return pipe; 54. Moving ring; 541. Guide groove; 55. Defoaming push plate; 56. Limiting rod; 57. Guide plate. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] like Figures 1 to 10As shown, an integrated extrusion mixing machine for rubber product production according to the present invention includes a barrel 10, a mixing structure 20, a screw structure, a heat-conducting medium conveying structure 40, and a control unit 11. The heat-conducting medium conveying structure 40 is used to convey the heat-conducting medium. The mixing structure 20 is connected to the barrel 10 and is used to mix the rubber compound. In the process of producing rubber products, modifiers or other auxiliary materials need to be added to the granular rubber raw material. The mixing structure mixes the granular rubber raw material with the modifiers to ensure a better effect in the subsequent production of rubber products. A die head 12 is connected to the discharge port of the barrel 10. The rubber product is extruded through the joint action of the die head 12 and the screw structure. The screw structure is rotatably disposed inside the barrel 10 and is used to convey the rubber compound. The screw structure includes a hollow shaft 30, one section of which penetrates the barrel 10 and extends to the outside of the barrel 10. The outer surface of the hollow shaft 30 is sequentially connected to a first conveying blade 31, a second conveying blade 32, and a conveyor belt. Blade 33, conveyor blades 31, 32, and 33 are all hollow blades. Each of these blades has a flow-diverting structure between itself and the hollow shaft 30. This flow-diverting structure regulates the flow of the heat-conducting medium through the blades. Furthermore, a defoaming structure is installed between the flow-diverting structure and the barrel 10 to remove air bubbles from the rubber compound. One end of the hollow shaft 30 is connected to a rotary joint 34, and the other end of the hollow shaft 30 is connected to a rotary joint 35. Both rotary joints 34 and 35 are connected to the heat transfer medium conveying structure 40. Rotary joints 34 and 35 are used to allow the heat transfer medium to enter or flow out of the hollow shaft 30 while the hollow shaft 30 is rotating. A drive unit 36 ​​is connected to the hollow shaft 30. The drive unit 36 ​​is used to drive the hollow shaft 30 to rotate. The drive unit 36 ​​is electrically connected to the control unit 11.

[0029] The barrel 10 of a normal extrusion machine is divided into three sections: a feeding section, a compression section, and a melting section. Conveyor blade 1 (31) corresponds to the feeding section, conveyor blade 2 (32) corresponds to the compression section, and conveyor blade 3 (33) corresponds to the melting section. During extrusion, the control unit 11 controls the rotational speed of the drive component 36, thereby controlling the rotational speed of the hollow shaft 30 driving the conveyor blades 1 (31), 2 (32), and 3 (33), and thus controlling the speed of conveying the rubber compound. At startup, a heat transfer medium enters the hollow shaft 30 and is then transported to the interior of the conveyor blades 1 (31), 2 (32), and 3 (33) through a flow-diverting structure, thereby raising the temperature of the hollow shaft 30, conveyor blades 1 (31), 2 (32), and 3 (33). The heated hollow shaft 30 preheats the rubber compound from the middle position, and the heated conveyor blades 1 (31), 2 (32), and 3 (33) further enhance the temperature of the rubber compound. The rubber compound is preheated while being fed, increasing the contact area with the compound. This ensures sufficient softening of the compound located in the middle of the barrel 10, greatly preventing inconsistent plasticization between the inside and outside of the compound. The control unit 11 controls the flow diversion structure based on the lengths of conveyor blades 31, 32, and 33, thereby controlling the contact time between the heat transfer medium and the conveyor blades 31, 32, and 33. This results in different temperatures in the contact areas between the conveyor blades 31, 32, and 33 and the compound, leading to different preheating temperatures for the feeding, compression, and melting sections. This quickly meets the reaction temperatures of the compound at different stages, reducing waste. Furthermore, different rubbers have different extrusion temperatures, and the residence time of the heat transfer medium between the conveyor blades 31, 32, and 33 varies for different rubbers.

[0030] like Figures 3 to 8 The diversion and interruption structure includes a protective cylinder 50 installed inside the barrel 10. A water inlet pipe 51 is installed inside the protective cylinder 50. A solenoid valve 52 electrically connected to the control unit 11 is installed on the water inlet pipe 51. One end of the water inlet pipe 51 on the three diversion and interruption structures is connected to the hollow shaft 30. The other end of the water inlet pipe 51 on the three diversion and interruption structures is connected to the first conveyor blade 31, the second conveyor blade 32, and the third conveyor blade 33, respectively. The ends of the first conveyor blade 31, the second conveyor blade 32, and the third conveyor blade 33 away from the water inlet pipe 51 are all connected to a return pipe 53.

[0031] When the heat transfer medium enters the hollow shaft 30, initially, all the solenoid valves 52 included in the three diversion and shut-off structures are open. The heat transfer medium entering the hollow shaft 30 then flows through the three inlet pipes 51 into the interiors of conveyor blade 1 31, conveyor blade 2 32, and conveyor blade 33 respectively, and returns to the hollow shaft 30 via the return pipe 53. The control unit 11 controls the opening and closing of the solenoid valves 52. When the heat transfer medium entering conveyor blade 1 31 raises its temperature to a specific level, the control unit 11 closes the solenoid valve 52 on the inlet pipe 51 connected to conveyor blade 1 31. At this point, the heat transfer medium no longer enters conveyor blade 1 31, and instead enters conveyor blade 2 32 and conveyor blade 33. After a period of time, conveyor blade 2 32... When a specific temperature is reached, the control unit closes the solenoid valve 52 on the water inlet pipe 51 connected to the second conveyor blade 32. At this time, the heat transfer medium enters the interior of the third conveyor blade 33 through the hollow shaft 30. When the third conveyor blade 33 reaches a specific temperature, the control unit closes the solenoid valve 52 on the water inlet pipe 51 connected to the third conveyor blade 33. At this time, the control unit 11 controls the heat transfer medium conveying structure 40 to stop conveying the heat transfer medium, thus completing the preheating operation of the feeding section, compression section and melting section at different temperatures. After closing the solenoid valve 52 on the water inlet pipe 51 connected to the first conveyor blade 31 and the second conveyor blade 32, the heat transfer medium will still preheat the rubber material located in the corresponding area (i.e., the feeding section and the compression section) of the first conveyor blade 31 and the second conveyor blade 32 when it flows inside the hollow shaft 30. However, the temperature rise rate of the feeding section and the compression section is slower at this time.

[0032] The feeding section primarily preheats and softens the rubber compound for easier conveying, with the temperature typically controlled between 60℃ and 90℃. In the compression section, the compound is compacted and further plasticized, with the temperature gradually increasing, generally set between 90℃ and 130℃. In the melting section, plasticization is complete, and the temperature continues to rise to 120℃–160℃. Taking a preset feeding section temperature of 65℃, a compression section temperature of 115℃, and a melting section temperature of 120℃ as an example, the above description is further explained. During preheating, when the feeding section temperature reaches 30℃-40℃, the control unit 11 closes the solenoid valve 52 on the water inlet pipe 51 connected to the conveying blade 31. When the compression section temperature reaches 70℃-80℃... At 0℃, the control unit closes the solenoid valve 52 on the water inlet pipe 51 connected to the second conveyor blade 32. When the temperature of the melting section reaches 75℃-85℃, the control unit closes the solenoid valve 52 on the water inlet pipe 51 connected to the third conveyor blade 33. Before closing the solenoid valve 52 on the water inlet pipe 51 connected to the third conveyor blade 33, the heat transfer medium moves inside the hollow shaft 30 and gradually increases the temperature of the feeding section and the compression section. When the solenoid valve 52 on the water inlet pipe 51 connected to the third conveyor blade 33 is closed, the temperature of the feeding section and the compression section is lower than the preset feeding section temperature and compression section temperature, so as to avoid premature vulcanization or scorching of the rubber compound and ensure the quality of the rubber compound.

[0033] It should be noted that one end of the protective cylinder 50 is equipped with a frustum-shaped flow guide seat. The diameter of the flow guide seat gradually increases along the direction of the rubber material movement. The flow guide seat plays a certain role in guiding the rubber material and prevents the rubber material from being blocked by the protective cylinder 50, which would cause the material to move unsmoothly.

[0034] like Figures 5 to 10 The defoaming structure includes a movable ring 54 slidably disposed on the outer surface of the protective cylinder 50 and a guide ring 13 installed on the inner wall of the barrel 10. The guide ring 13 includes two spiral semi-rings connected end to end. Multiple defoaming push plates 55 and two limiting rods 56 are fixedly connected to the outer surface of the movable ring 54. The guide ring 13 is located between the two limiting rods 56. A guide assembly is provided between the movable ring 54 and the protective cylinder 50. The guide assembly is used to guide the movable ring 54 so that the movable ring 54 moves along the length direction of the protective cylinder 50.

[0035] The guide assembly includes a guide plate 57 mounted on the outer surface of the protective cylinder 50 and a guide groove 541 formed on the inner wall of the moving ring 54. There is at least one guide plate 57 and one guide groove 541. A portion of the guide plate 57 is located inside the guide groove 541 and is slidably connected to the guide groove 541.

[0036] During the rotation of the hollow shaft 30, the protective cylinder 50 rotates accordingly. As the protective cylinder 50 rotates, the limiting rod 56 rotates as well. At this time, under the action of the guide ring 13, the limiting rod 56 will reciprocate. As the limiting rod 56 moves, under the action of the guide plate 57 and the guide groove 541, the moving ring 54 will reciprocate, thereby causing the defoaming push plate 55 to reciprocate. The reciprocating movement of the defoaming push plate 55 extrudes the rubber material, which not only eliminates the air bubbles generated in the rubber material, but also, because the defoaming structure is located between the conveying blade 31, the conveying blade 32, and the conveying blade 33, it forms a cycle of shearing, extrusion, and relaxation on the material. The shearing action can refine the material particles and accelerate the melting process. The extrusion action can make the material contact with the barrel and screw more fully and the temperature distribution more uniform. The relaxation action avoids local shearing overheating and prevents material degradation, thereby making the product quality after extrusion better and improving the dispersibility of the rubber material with modifiers or other components.

[0037] It should be noted that the surfaces of the protective cylinder 50, the moving ring 54, the guide ring 13, the defoaming push plate 55, the limiting rod 56, and the guide plate 57 are all coated with a non-stick coating to reduce the friction of the adhesive during movement. A through groove is provided on the defoaming push plate 55 to allow some adhesive to pass through it, thereby creating a self-cleaning effect. The defoaming push plate 55 may also have a rounded transition edge to reduce the obstruction of the adhesive and prevent it from adhering to the surface of the defoaming push plate 55. The outer diameter of the moving ring 54 is smaller than the minimum inner diameter of the guide ring 13 to avoid interference between the moving ring 54 and the guide ring 13 during movement, ensuring that the moving ring 54 moves smoothly.

[0038] like Figures 1 to 5 The heat transfer medium conveying structure 40 includes a delivery pump 41 electrically connected to the control unit 11. The outlet of the delivery pump 41 is connected to a rotary joint 34 via a pipe. A flow rate monitoring element (not shown in the figure) electrically connected to the control unit 11 is connected on the pipe between the delivery pump 41 and the rotary joint 34. The flow rate monitoring element is used to monitor the flow rate of the heat transfer medium. A heat transfer medium storage tank 42 is connected to the inlet of the delivery pump 41 via a pipe. A heating element 43 and a temperature monitoring element 44 are provided on the heat transfer medium storage tank 42. Both the heating element 43 and the temperature monitoring element 44 are electrically connected to the control unit 11. The heat transfer medium storage tank 42 is connected to a rotary joint 35 via a pipe. Temperature sensors (not shown in the figure) are connected to both the pipe connected to the rotary joint 34 and the pipe connected to the rotary joint 35. The temperature sensors are located near the barrel 10 to measure the temperature of the heat transfer medium entering the rotary joint 34 and flowing out of the rotary joint 35.

[0039] Before preheating, the heat transfer medium is stored inside the heat transfer medium storage tank 42, and the heat transfer medium is raised to a preset temperature by the heating element 43. During the preheating operation, the heat transfer medium circulates between the heat transfer medium storage tank 42, the delivery pump 41, the first rotary joint 34, the hollow shaft 30, and the second rotary joint 35. The temperature of the heat transfer medium inside the heat transfer medium storage tank 42 is monitored by the temperature monitoring element 44. When the temperature is low, the control unit 11 controls the heating element 43 to work and heat the heat transfer medium. The preset heat transfer medium temperature is directly related to the flow rate of the heat transfer medium. The higher the preset heat transfer temperature, the faster the flow rate of the heat transfer medium, which makes the flow rate of the heat transfer medium inside the hollow shaft 30 also faster. The preferred heat transfer medium is heat transfer oil. When the third delivery blade 33 reaches a certain temperature, the control unit 11 shuts down the delivery pump 41, thereby stopping the delivery of the heat transfer medium.

[0040] like Figures 1 to 3 The mixing structure 20 includes a mixing box 21, a stirring structure 22 is provided inside the mixing box 21, a conveying cylinder 23 is connected to the discharge port of the mixing box 21, a conveying auger 24 is provided inside the conveying cylinder 23, the discharge port of the conveying cylinder 23 is connected to the inside of the machine cylinder 10, and the discharge port of the conveying auger 24 corresponds to the position of the conveying blade 31.

[0041] The rubber compound and modifier are mixed by the stirring structure 22. The mixed rubber compound will enter the interior of the conveying cylinder 23. The conveying auger 24 can greatly avoid the situation of too much or too little rubber compound entering the machine cylinder 10, so that the feed rate is more uniform.

[0042] like Figure 3 The inner wall of the barrel 10 is equipped with a protective cylinder 2 17, and the rotary joint 2 35 is located inside the protective cylinder 2 17. The protective cylinder 2 17 is concentrically set with the barrel 10, and the outer diameter of the protective cylinder 2 17 is smaller than the inner diameter of the barrel 10. The protective cylinder 2 17 is located between the barrel 10 and the die head 12. The protective cylinder 2 17 protects the rotary joint 2 35 and avoids the influence of the rubber material on the rotary joint 2 35. One end of the protective cylinder 2 17 is provided with a frustum-shaped flow guide seat. The diameter of the flow guide seat gradually increases along the direction of rubber material movement. The flow guide seat plays a certain guiding role for the rubber material and avoids the rubber material being blocked by the protective cylinder 2 17, which would cause the movement to be unsmooth.

[0043] It also includes a base 14, on which a frame 15 is mounted. The frame 15 is connected to the barrel 10 to ensure the stability of the barrel 10. Multiple heating elements 16 are provided on the barrel 10, which are used to heat the barrel 10.

[0044] A support frame 37 is connected to the drive component 36. The support frame 37 is connected to the rotary joint 34 to ensure the stability of the rotary joint 34.

[0045] The control unit 11 controls the on / off time of the solenoid valve 52 based on the following formula: Where in the formula This represents the on / off time of the nth solenoid valve. This represents the mass of the nth segment of the rubber compound. This represents the specific heat capacity of the rubber compound. This represents the target temperature rise difference for the nth segment, which is a preset value. Represents the flow rate of the heat-conducting medium. Represents the density of the heat-conducting medium. The specific heat capacity of a heat-conducting medium. The inlet and outlet temperature difference represents the heat transfer medium. This represents the heat transfer efficiency of the nth segment. Represents the length correction factor. This represents the effective length of the nth conveyor blade. This represents the feed rate correction factor. The feed rate is determined by the conveying capacity of the conveying auger 24 and the working time. The conveying capacity of the conveying auger 24 is determined by the pitch of the auger blades and the height of the auger blades.

[0046] In the above formula, n = 1, 2, 3. Taking n = 1 as an example, This represents the on / off time of the first solenoid valve, specifically the on / off time of solenoid valve 52 located in the feeding section. This represents the quality of the rubber compound conveyed in the feeding section. The target temperature rise difference represents the feeding section. This represents the heat exchange efficiency of the feeding section. This represents the effective length of the conveying blade, i.e., the length of the feeding section. Similarly, when n=2, it represents the compression section, and when n=3, it represents the melting section.

[0047] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An integrated extrusion mixing machine for rubber product manufacturing, characterized in that, include: The barrel (10) and the control unit (11); A hollow shaft (30) is rotatably installed inside the barrel (10). The outer surface of the hollow shaft (30) is connected in sequence to a first conveying blade (31), a second conveying blade (32), and a third conveying blade (33), all of which have a hollow internal structure. A flow-diverting structure is provided between the first conveying blade (31), the second conveying blade (32), and the third conveying blade (33) and the hollow shaft (30). The flow-diverting structure is used to regulate the flow of heat transfer medium to the first conveying blade (31), the second conveying blade (32), and the third conveying blade (33). The flow-diverting structure includes a water inlet pipe (51) connected to the hollow shaft (30) and a solenoid valve (52). The solenoid valve (52) is electrically connected to the control unit (11). The control unit (11) controls the opening and closing of the solenoid valve (52). One end of the water inlet pipe (51) on the three flow-diverting structures is connected to the hollow shaft (30). The defoaming structure is set between the flow-blocking structure and the barrel (10). The defoaming structure is used to remove air bubbles in the rubber compound. The drive unit (36) is connected to the hollow shaft (30). A rotary joint (34) is connected to the drive unit (36). The rotary joint (34) is connected to one end of the hollow shaft (30), and a rotary joint (35) is connected to the other end of the hollow shaft (30). The heat transfer medium conveying structure (40) is connected to rotary joint one (34) and rotary joint two (35). The heat transfer medium conveying structure (40) is used to convey the heat transfer medium.

2. The extrusion mixing machine for rubber product manufacturing according to claim 1, characterized in that, The diversion and disconnection structure also includes a protective cylinder (50), a solenoid valve (52) is installed inside the protective cylinder (50), and a return pipe (53) is connected to the end of the conveying blade (31), the conveying blade (32) and the conveying blade (33) away from the water inlet pipe (51).

3. The extrusion mixing machine for rubber product manufacturing according to claim 2, characterized in that, The defoaming structure includes a moving ring (54), a guide ring (13), a defoaming pusher (55), a limiting rod (56), and a guide assembly. The moving ring (54) is slidably disposed on the outer surface of the protective cylinder (50). The guide ring (13) is installed on the inner wall of the machine cylinder (10). The guide ring (13) includes two spiral semi-rings, with the two semi-rings connected to each other at their ends. The defoaming pusher (55) and the limiting rod (56) are both connected to the outer surface of the moving ring (54). There are multiple defoaming pushers (55) and two limiting rods (56). The guide ring (13) is located between the two limiting rods (56). The guide assembly is disposed between the moving ring (54) and the protective cylinder (50). The guide assembly is used to guide the moving ring (54).

4. The extrusion mixing machine for rubber product manufacturing according to claim 1, characterized in that, The heat transfer medium conveying structure includes a conveying pump (41), a heat transfer medium storage tank (42), a heating element (43), and a temperature monitoring element (44). The outlet of the conveying pump (41) is connected to a rotary joint (34) through a pipe. A flow rate monitoring element electrically connected to the control unit (11) is connected on the pipe between the conveying pump (41) and the rotary joint (34). The inlet of the conveying pump (41) is connected to the heat transfer medium storage tank (42) through a pipe. The heating element (43) and the temperature monitoring element (44) are both installed on the heat transfer medium storage tank (42). The heat transfer medium storage tank (42) is connected to a rotary joint (35) through a pipe.

5. The extrusion mixing machine for rubber product manufacturing according to claim 1, characterized in that, The machine barrel (10) is connected to a conveying cylinder (23), and a conveying auger (24) is installed inside the conveying cylinder (23). A mixing box (21) is connected to the conveying cylinder (23), and a stirring structure (22) is installed on the mixing box (21).

6. The extrusion mixing machine for rubber product manufacturing according to claim 3, characterized in that, The guiding assembly includes a guide plate (57) and a guide groove (541). The guide plate (57) is installed on the outer surface of the protective cylinder (50), and the guide groove (541) is opened on the inner wall of the moving ring (54). There is at least one guide plate (57) and one guide groove (541). A part of the guide plate (57) is located inside the guide groove (541) and is slidably connected to the guide groove (541).

7. The extrusion mixing machine for rubber product manufacturing according to claim 1, characterized in that, The inner wall of the barrel (10) is fitted with a second protective cylinder (17), and the second rotary joint (35) is located inside the second protective cylinder (17).

8. The extrusion mixing machine for rubber product manufacturing according to claim 1, characterized in that, The control unit (11) controls the on / off time of the solenoid valve (52) based on the following formula: Where in the formula This represents the on / off time of the nth solenoid valve. This represents the mass of the nth segment of the rubber compound. This represents the specific heat capacity of the rubber compound. This represents the target temperature rise difference for the nth segment. Represents the flow rate of the heat-conducting medium. Represents the density of the heat-conducting medium. The specific heat capacity of a heat-conducting medium. The inlet and outlet temperature difference represents the heat transfer medium. This represents the heat transfer efficiency of the nth segment. Represents the length correction factor. This represents the effective length of the nth conveyor blade. This represents the feed rate correction factor.

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