A raw material mixing device for rubber production

Abstract

The application relates to the technical field of rubber production equipment, in particular to a raw material mixing device for rubber production, which comprises a mixing cavity, a stirring assembly and an auxiliary mixing assembly. The stirring assembly is connected with a driving unit through a transmission mechanism, and the auxiliary mixing assembly is arranged at the bottom of the mixing cavity, and the two components realize uniform mixing through synergistic action. The stirring blades are designed in an arc shape and a spiral shape, so that the fluidity is improved; a scraping plate and an elastic scraping strip are used to remove residual raw materials. Heat conduction sheets are embedded in the heating jacket, so that the viscosity of the raw materials is reduced, and the mixing efficiency is improved. The application can effectively solve the problem of uneven mixing of high-viscosity raw materials, reduce energy consumption, simplify the structure, improve operation convenience and be suitable for raw material mixing processes in rubber production.

Description

Technical Field

[0001] This utility model belongs to the technical field of rubber production equipment, specifically a raw material mixing device for rubber production. Background Technology

[0002] In rubber production, uniform mixing of raw materials is crucial for ensuring product quality and performance stability. Currently, some mixing devices based on principles of stirring, shearing, and heating have emerged in the market; however, these devices have limitations in practical applications. For example, some mixing devices are prone to uneven mixing when handling high-viscosity raw materials, and their complex structures result in high maintenance costs. Furthermore, these devices often consume significant amounts of energy and place high demands on the operating environment.

[0003] For example, the Chinese invention patent (application number: 201910345678.2) discloses a "high-efficiency rubber mixing device," the description of which includes a base, a support frame fixedly connected to the base, a drive motor mounted on the top of the support frame, a stirring shaft connected to the output end of the drive motor, multiple sets of stirring blades arranged on the outer side of the stirring shaft, a heating component and a cooling component also mounted on the base, and a scraper plate arranged at the bottom of the stirring shaft, the scraper plate being in contact with the inner wall of the mixing chamber. This application, through the design of multiple sets of stirring blades and a scraper plate, can improve mixing efficiency and reduce raw material residue; the above patent can corroborate the room for improvement in the prior art.

[0004] Therefore, we have made improvements to this and proposed a raw material mixing device for rubber production. Utility Model Content

[0005] The purpose of this invention is to solve the problem of uneven mixing that easily occurs when the raw material mixing device used in rubber production processes high-viscosity raw materials, while reducing the complexity of the equipment structure, reducing energy consumption, and improving the ease of operation.

[0006] To achieve the aforementioned objectives and address the problems, this utility model provides a raw material mixing device for rubber production, comprising a mixing chamber, a stirring assembly, and an auxiliary mixing assembly. The stirring assembly is located inside the mixing chamber and is connected to a drive unit via a transmission mechanism. The auxiliary mixing assembly is located at the bottom of the mixing chamber and works in conjunction with the stirring assembly. The uniform mixing of the raw materials is achieved through the cooperation of the stirring assembly and the auxiliary mixing assembly. A heating sleeve is provided on the outer side of the mixing chamber, and several heat-conducting plates are embedded within the heating sleeve. These heat-conducting plates are fixedly connected to the inner wall of the heating sleeve for heating the raw materials within the mixing chamber.

[0007] The stirring assembly includes a main shaft and several stirring blades. The main shaft is arranged along the central axis of the mixing chamber. The stirring blades are divided into upper blades and lower blades. The upper blades and lower blades are fixed at different heights of the main shaft. The upper blades are arc-shaped and the lower blades are spiral-shaped. The top end of the main shaft is rotatably connected to the top of the mixing chamber through a bearing, and the bottom end is connected to the output end of the drive unit through a coupling.

[0008] As a preferred technical solution of this application, the auxiliary mixing component includes a scraper and an elastic scraper. The scraper has a ring-shaped structure, with its outer side conforming to the inner wall of the mixing chamber. The elastic scraper is fixed to the inner side of the scraper and evenly distributed along the circumference of the scraper. The end of the elastic scraper is in contact with the inner wall of the mixing chamber to remove raw material residue adhering to the inner wall of the mixing chamber. The scraper is fixedly connected to the main shaft by several support rods. The support rods are arranged radially along the main shaft, and there are three support rods in total, with an included angle of 120° between adjacent support rods.

[0009] As a preferred technical solution of this application, the transmission mechanism includes a gear set and a transmission shaft. The gear set consists of a driving gear and a driven gear. The driving gear is fixed to the output end of the drive unit, and the driven gear is fixed to one end of the transmission shaft. The other end of the transmission shaft is connected to the main shaft through a coupling. The gear ratio design of the gear set makes the rotational speed of the main shaft lower than the output rotational speed of the drive unit.

[0010] As a preferred technical solution of this application, the outer side of the heating jacket is provided with a heat insulation layer, the heat insulation layer is made of high temperature resistant material, the heat-conducting sheet is made of aluminum alloy, the thickness of the heat-conducting sheet is 3mm, and the surface of the heat-conducting sheet is provided with several heat dissipation grooves, which extend along the length of the heat-conducting sheet to improve heat transfer efficiency.

[0011] As a preferred technical solution of this application, the bottom of the mixing chamber is provided with a discharge port, and a control valve is installed at the discharge port. The control valve is connected to the discharge port by a thread, and a sealing ring is provided inside the control valve. The sealing ring is made of silicone and is used to prevent raw material leakage.

[0012] As a preferred technical solution of this application, the top of the mixing chamber is provided with a feed inlet, and a cover plate is installed at the feed inlet. The cover plate is connected to the top of the mixing chamber by a hinge, and a sealing gasket is provided on the edge of the cover plate. The sealing gasket is made of fluororubber to ensure the sealing of the mixing chamber.

[0013] As a preferred technical solution of this application, the drive unit includes a motor and a reducer. The output end of the motor is connected to the input end of the reducer, and the output end of the reducer is connected to the drive gear of the transmission mechanism. The outer casing of the motor is provided with heat dissipation holes, and the inner side of the heat dissipation holes is provided with a dustproof screen to prevent dust from entering the motor.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: In the scheme of this application: By incorporating a stirring assembly and auxiliary mixing components, the mixing process utilizes stirring blades to shear and stir the raw materials. Simultaneously, scrapers and elastic scrapers remove residual materials from the inner wall of the mixing chamber, preventing uneven mixing caused by the adhesion of high-viscosity materials. The arc and spiral design of the stirring blades effectively improves the flowability of the raw materials, promoting uniform mixing. Furthermore, the heating jacket and heat-conducting plates heat the raw materials during mixing, further reducing their viscosity and improving mixing efficiency. The transmission mechanism design reduces the spindle speed, decreasing energy consumption during operation and extending the equipment's lifespan. The overall structure is simple, maintenance costs are low, and operation is convenient, solving the problems of complex structures, high energy consumption, and poor mixing effects in existing mixing devices. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the structure of the stirring component and the auxiliary mixing component in this utility model.

[0017] Figure 3 This is a partial cross-sectional view of the heating jacket and heat-conducting plate in this utility model.

[0018] Figure 4 This is a schematic diagram of the transmission mechanism in this utility model.

[0019] The attached figures are labeled as follows: 1. Mixing chamber; 2. Stirring assembly; 3. Auxiliary mixing assembly; 4. Heating jacket; 5. Heat-conducting plate; 6. Main shaft; 7. Stirring blades; 8. Scraper; 9. Elastic scraper; 10. Transmission mechanism; 11. Drive unit; 12. Discharge port; 13. Control valve; 14. Feed port; 15. Cover plate. Detailed Implementation

[0020] like Figures 1 to 4As shown, this utility model provides a raw material mixing device for rubber production, which mainly includes a mixing chamber 1, a stirring assembly 2, an auxiliary mixing assembly 3, a heating jacket 4, a heat-conducting plate 5, a transmission mechanism 10, and a drive unit 11. The structural composition and operating principle of this utility model will be described in detail below with reference to the accompanying drawings.

[0021] The mixing chamber 1 has a cylindrical structure with an inlet 14 at the top and an outlet 12 at the bottom. The inlet 14 is located at the top of the mixing chamber 1 and is connected to a cover plate 15 via a hinge. The edge of the cover plate 15 has a sealing gasket made of fluororubber, which tightly fits the edge of the top opening of the mixing chamber 1 to ensure its sealing during operation. The outlet 12 is located at the center of the bottom of the mixing chamber 1 and houses a control valve 13. The control valve 13 is threaded to the outlet 12 and has a silicone sealing ring inside to prevent material leakage. A heating jacket 4 surrounds the mixing chamber 1, embedding multiple heat-conducting plates 5. The heat-conducting plates 5 are fixed along the inner wall of the heating jacket 4, and their surfaces have several heat dissipation grooves extending along their length. The heat-conducting plates 5 are made of aluminum alloy and are 3mm thick to improve heat transfer efficiency. The heating jacket 4 is also provided with an insulation layer on the outside. The insulation layer is made of high temperature resistant material, which can reduce heat loss and ensure the temperature stability inside the mixing chamber 1.

[0022] The mixing assembly 2 includes a main shaft 6 and multiple sets of mixing blades 7. The main shaft 6 is arranged along the central axis of the mixing chamber 1, with its top end rotatably connected to the top of the mixing chamber 1 via a bearing, and its bottom end connected to the output end of the transmission mechanism 10 via a coupling. The mixing blades 7 are divided into upper and lower blades, which are fixed at different heights on the main shaft 6. The upper blades are arc-shaped, and the lower blades are spiral-shaped. The radius of curvature of the arc-shaped blades is designed according to the inner diameter of the mixing chamber 1 to ensure a suitable distance between the blades and the inner wall of the chamber. The pitch of the spiral blades is optimized to effectively transport high-viscosity raw materials during rotation. The mixing blades 7 are connected to the main shaft 6 by welding or bolting, and the number and distribution of the blades can be adjusted according to actual needs to achieve the best mixing effect.

[0023] The auxiliary mixing component 3 includes a scraper 8 and an elastic scraper 9. The scraper 8 has a ring-shaped structure, with its outer side fitting against the inner wall of the mixing chamber 1. The elastic scraper 9 is fixed to the inner side of the scraper 8 and evenly distributed along its circumference. The end of the elastic scraper 9 remains in contact with the inner wall of the mixing chamber 1 to remove material residue adhering to the inner wall of the mixing chamber 1. The scraper 8 is fixedly connected to the main shaft 6 by three support rods. The support rods are arranged radially along the main shaft 6, with an included angle of 120° between adjacent support rods to ensure that the scraper 8 is subjected to uniform force during rotation and to avoid equipment vibration caused by eccentricity. The elastic scraper 9 is made of wear-resistant rubber, and its hardness and elasticity are selected according to the characteristics of the raw material to ensure that it can effectively remove residual raw material without damaging the inner wall of the mixing chamber 1.

[0024] The transmission mechanism 10 includes a gear set and a drive shaft. The gear set consists of a driving gear and a driven gear. The driving gear is fixed to the output end of the drive unit 11, and the driven gear is fixed to one end of the drive shaft. The other end of the drive shaft is connected to the main shaft 6 via a coupling. The gear ratio of the gear set is designed so that the rotational speed of the main shaft 6 is lower than the output speed of the drive unit 11, thereby reducing the rotational speed of the main shaft 6, reducing energy consumption during equipment operation, and extending the service life of the equipment. The drive unit 11 includes a motor and a reducer. The output end of the motor is connected to the input end of the reducer, and the output end of the reducer is connected to the driving gear of the transmission mechanism 10. The motor housing is provided with heat dissipation holes, and the inner side of the heat dissipation holes is provided with a dustproof screen to prevent dust from entering the motor and to ensure effective heat dissipation during long-term operation.

[0025] The working principle of this utility model is as follows: First, the raw materials to be mixed are added into the mixing chamber 1 through the feed port 14. After closing the cover plate 15, the drive unit 11 is started. The motor of the drive unit 11 drives the reducer to run. The output end of the reducer transmits power to the main shaft 6 through the transmission mechanism 10, so that the main shaft 6 drives the stirring assembly 2 and the auxiliary mixing assembly 3 to rotate synchronously. Under the action of the stirring assembly 2, the upper arc-shaped blades shear and stir the raw materials, while the lower spiral blades improve the fluidity of the raw materials by conveying them, thus promoting the uniformity of mixing. At the same time, the scraper 8 and the elastic scraper 9 in the auxiliary mixing assembly 3 rotate with the main shaft 6. The elastic scraper 9 continuously removes the raw material residues adhering to the inner wall of the mixing chamber 1, ensuring that the raw materials will not affect the mixing effect due to adhesion. The heat-conducting plate 5 in the heating jacket 4 is heated by an external heat source, transferring heat to the raw materials in the mixing chamber 1, further reducing the viscosity of the raw materials, thereby improving the mixing efficiency. After mixing is completed, the control valve 13 is opened, and the mixed raw materials are discharged through the discharge port 12.

[0026] This invention, through the above-mentioned structural design and operating principle, solves the problem of uneven mixing that easily occurs when processing high-viscosity raw materials in existing rubber production raw material mixing devices. At the same time, it reduces the complexity of the equipment structure, reduces energy consumption, and improves the ease of operation.

[0027] To enable those skilled in the art to fully understand and implement this utility model, the specific implementation principle of this utility model is further explained below in conjunction with a specific application scenario.

[0028] In the rubber production process, the operator first adds the various raw materials to be mixed into the mixing chamber 1 through the feed inlet 14. After the cover plate 15 is closed, the fluororubber sealing gaskets on its edges tightly fit the edge of the top opening of the mixing chamber 1, ensuring the sealing of the mixing chamber 1 during operation and preventing external impurities from entering or raw materials from overflowing. Subsequently, the drive unit 11 is started, and the motor drives the reducer. The power output from the reducer is transmitted to the main shaft 6 through the transmission mechanism 10, causing the main shaft 6 to start rotating. During this process, the gear set design in the transmission mechanism 10 ensures that the rotational speed of the main shaft 6 is lower than the output speed of the drive unit 11, thereby reducing energy consumption and extending the service life of the equipment.

[0029] The rotation of the main shaft 6 drives the stirring assembly 2 and the auxiliary mixing assembly 3 to operate synchronously. In the stirring assembly 2, the upper arc-shaped blades shear and stir the raw materials, while the lower spiral blades improve the flowability of the raw materials by conveying them. The radius of curvature of the arc-shaped blades is designed according to the inner diameter of the mixing chamber 1 to ensure a moderate distance between the blades and the inner wall of the chamber; the pitch of the spiral blades is optimized to effectively handle high-viscosity raw materials. The number and distribution of the stirring blades 7 can be adjusted according to actual needs to achieve the best mixing effect. At the same time, the scraper 8 in the auxiliary mixing assembly 3 rotates with the main shaft 6, and the elastic scraper 9 continuously removes the raw material residue adhering to the inner wall of the mixing chamber 1, preventing the raw material from affecting the mixing uniformity due to adhesion. The elastic scraper 9 is made of wear-resistant rubber, and its hardness and elasticity are selected according to the characteristics of the raw materials, which can effectively remove residual raw materials without damaging the inner wall of the mixing chamber 1.

[0030] The heat-conducting plate 5 inside the heating jacket 4 is heated by an external heat source, and the heat is transferred to the raw material in the mixing chamber 1 via the heat-conducting plate 5. The heat dissipation grooves on the surface of the heat-conducting plate 5 extend along its length, improving heat transfer efficiency. Simultaneously, the insulation layer on the outside of the heating jacket 4 reduces heat loss, ensuring a stable temperature within the mixing chamber 1. This design reduces the viscosity of the raw material through heating, further improving mixing efficiency. Throughout the process, the discharge port 12 at the bottom of the mixing chamber 1 remains closed, and the silicone sealing ring inside the control valve 13 prevents raw material leakage, ensuring the stability of the mixing process.

[0031] After mixing is complete, the operator opens control valve 13, and the mixed material is discharged through outlet 12. Since outlet 12 is located at the bottom center of mixing chamber 1, and control valve 13 is connected to outlet 12 via threads, convenient and reliable discharge operation is achieved. Furthermore, the heat dissipation holes and dust filter design on the motor housing ensure effective heat dissipation during long-term operation, while preventing dust from entering the motor and extending the equipment's service life.

[0032] Through the above steps, this invention achieves a uniform mixing effect when processing high-viscosity raw materials. The arc-shaped and spiral-shaped blades of the stirring component 2 are optimized for shear mixing and flowability improvement, respectively. The auxiliary mixing component 3 uses the elastic scraper 9 to remove residual raw materials from the inner wall, avoiding uneven mixing. The design of the heating jacket 4 and the heat-conducting plate 5 reduces the viscosity of the raw materials through temperature control, further improving mixing efficiency. The gear ratio design of the transmission mechanism 10 not only reduces the rotational speed of the main shaft 6 but also reduces energy consumption during equipment operation. The overall structure is simple, maintenance costs are low, and operation is convenient, solving the problems of complex structure, high energy consumption, and poor mixing effect of existing mixing devices.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A raw material mixing device for rubber production, characterized in that, The mixture includes a mixing chamber (1), a stirring assembly (2), an auxiliary mixing assembly (3), a heating jacket (4), and a transmission mechanism (10). The mixing chamber (1) is a cylindrical structure with a stirring assembly (2) inside. The stirring assembly (2) is connected to a drive unit (11) through the transmission mechanism (10). The auxiliary mixing assembly (3) is located at the bottom of the mixing chamber (1) and works in cooperation with the stirring assembly (2). The heating jacket (4) is located on the outside of the mixing chamber (1). The heating jacket (4) has multiple heat-conducting plates (5) embedded inside it. The heat-conducting plates (5) are fixedly connected to the inner wall of the heating jacket (4).

2. The raw material mixing device for rubber production according to claim 1, characterized in that, The stirring assembly (2) includes a main shaft (6) and multiple sets of stirring blades (7). The main shaft (6) is arranged along the central axis of the mixing chamber (1). The stirring blades (7) are divided into upper blades and lower blades. The upper blades are arc-shaped and the lower blades are spiral-shaped. The top end of the main shaft (6) is rotatably connected to the top of the mixing chamber (1) through a bearing, and the bottom end is connected to the output end of the transmission mechanism (10) through a coupling.

3. The raw material mixing device for rubber production according to claim 1, characterized in that, The auxiliary mixing component (3) includes a scraper (8) and an elastic scraper (9). The scraper (8) has a ring structure and its outer side is attached to the inner wall of the mixing chamber (1). The elastic scraper (9) is fixed to the inner side of the scraper (8) and is evenly distributed along the circumference of the scraper (8). The scraper (8) is fixedly connected to the main shaft (6) by three support rods, and the included angle between adjacent support rods is 120 degrees.

4. The raw material mixing device for rubber production according to claim 1, characterized in that, The transmission mechanism (10) includes a gear set and a transmission shaft. The gear set consists of a driving gear and a driven gear. The driving gear is fixed to the output end of the drive unit (11), and the driven gear is fixed to one end of the transmission shaft. The other end of the transmission shaft is connected to the main shaft (6) via a coupling.

5. The raw material mixing device for rubber production according to claim 1, characterized in that, The heating jacket (4) has an insulation layer on its outer side. The heat-conducting sheet (5) is made of aluminum alloy with a thickness of 3.0 mm. The surface of the heat-conducting sheet (5) is provided with several heat dissipation grooves, which extend along the length of the heat-conducting sheet (5).

6. The raw material mixing device for rubber production according to claim 1, characterized in that, The bottom of the mixing chamber (1) is provided with a discharge port (12), and a control valve (13) is installed at the discharge port (12). The control valve (13) is connected to the discharge port (12) by a thread, and a sealing ring is provided inside the control valve (13). The sealing ring is made of silicone.

7. The raw material mixing device for rubber production according to claim 1, characterized in that, The mixing chamber (1) has a feed inlet (14) at the top, and a cover plate (15) is installed at the feed inlet (14). The cover plate (15) is connected to the top of the mixing chamber (1) by a hinge. The edge of the cover plate (15) is provided with a sealing gasket, and the sealing gasket is made of fluororubber.

8. The raw material mixing device for rubber production according to claim 1, characterized in that, The drive unit (11) includes a motor and a reducer. The output end of the motor is connected to the input end of the reducer. The output end of the reducer is connected to the drive gear of the transmission mechanism (10). The outer casing of the motor is provided with heat dissipation holes, and the inner side of the heat dissipation holes is provided with a dustproof net.

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