Internal mixing feeding device

Abstract

The utility model discloses an internal mixing and feeding device, which relates to the technical field of tire production and comprises a powder bin for storing carbon black, a metering hopper for weighing and a feeding bin for temporary storage and weighing, and the powder bin is connected with the metering hopper through a stirrer and a screw feeder in sequence; discharging ports of the multiple powder bins are connected to a stirring inlet of the stirrer in parallel. A discharge valve is arranged on each discharge hole; a stirring outlet of the stirrer is connected with a screw feeder, and a discharging end of the screw feeder is connected with a metering hopper; a plurality of feeding bins are arranged, and a discharge valve is arranged at the bottom of each feeding bin; and the metering hopper is communicated with different feeding bins through a material guide device. The premixing effect of the carbon black is realized, and the difference between batches is reduced; meanwhile, accurate weighing is realized, the weighed carbon black can be stored in different bins and added in batches, and the dispersion level of the carbon black is greatly improved, so that the mixing effect and the performance of a finished product are improved.

Description

Technical Field

[0001] This utility model relates to the field of tire production technology, and in particular to a mixing and feeding device. Background Technology

[0002] The most crucial step in tire production is the internal mixing process, as the performance of the rubber compound produced directly impacts tire performance. During internal mixing, carbon black is added to the mixer and mixed with the rubber compound. However, powdery materials like carbon black are difficult to weigh accurately, and the magnitude of this error can severely affect the compound's performance. Furthermore, when changing batches of carbon black, differences between the two batches can easily lead to production fluctuations. Additionally, existing feeding devices add carbon black to the mixer all at once after weighing it. Past experimental data shows that this method of adding carbon black reduces its dispersion level, decreasing the mixing effect and ultimately the performance of the finished product. Utility Model Content

[0003] The purpose of this invention is to provide a mixing and feeding device that achieves the premixing effect of carbon black and reduces the batch-to-batch variability. At the same time, it enables accurate weighing and allows the weighed carbon black to be stored in separate compartments and added in batches, which greatly improves the dispersion level of carbon black, thereby improving the mixing effect and the performance of the finished product.

[0004] To achieve the above objectives, this utility model provides a mixing and feeding device, including a powder silo for storing carbon black, a weighing hopper for weighing, and a feeding silo for temporary weighing. The powder silo and the weighing hopper are connected in sequence by an agitator and a screw feeder. Multiple powder silos are provided, and the discharge ports of multiple powder silos are connected in parallel to the mixing inlet of the agitator. Each discharge port is equipped with a discharge valve. The mixing outlet of the agitator is connected to the screw feeder, and the discharge end of the screw feeder is connected to the weighing hopper. Multiple feeding silos are provided, and the bottom of each feeding silo is equipped with a discharge valve. The weighing hopper is connected to different feeding silos through a material guiding device.

[0005] With the above structure, multiple powder silos are set up to store different batches of carbon black. Carbon black from two powder silos enters the agitator together, and the agitator eliminates the differences between the two batches of carbon black, improving product stability. By setting up a screw feeder, it is convenient to push out carbon black for precise weighing, allowing the carbon black to fall slowly into the weighing hopper, avoiding excessively coarse graduations that would result in low weighing accuracy, thus achieving precise weighing. By setting up multiple feeding silos, the precisely weighed carbon black is guided into different feeding silos through a feeding device, achieving separate storage for batch addition, which greatly improves the dispersion level of carbon black, thereby improving the mixing effect and the performance of the finished product.

[0006] Preferably, the agitator includes a tube body and a stirring device rotatably mounted inside the tube body; the upper end of the tube body is provided with a stirring inlet, and the lower end of the tube body is provided with a stirring outlet; multiple stirring inlets are provided, and each stirring inlet is connected to a powder hopper. This configuration enables real-time online stirring, achieving stirring without the need for machine shutdown.

[0007] Preferably, the stirring device includes a stirring blade rotatably mounted inside the tube and a stirring drive device fixed to the outside of the tube and connected to the stirring blade; the stirring blade includes multiple vertically connected spiral blades, with adjacent vertical spiral blades staggered end-to-end. This arrangement maximizes the dispersion effect while reducing the volume of the stirring device, which is beneficial for mixing and dispersing two batches of carbon black.

[0008] Preferably, a corrugated hose is installed between the screw feeder and the weighing hopper. This corrugated hose ensures that the weighing of the hopper is not affected, while also preventing carbon black from flying away.

[0009] Preferably, the material guiding device includes a material guiding bracket, a material guiding pipe rotatably mounted on the material guiding bracket, and a material guiding drive device for driving the material guiding pipe to rotate; the material guiding pipe includes a vertically downward straight pipe section and a downwardly inclined pipe section; the discharge port of the metering hopper is inserted into the straight pipe section; the feeding bins are evenly distributed around the same diameter of the material guiding bracket, and by rotation, the discharge end of the inclined pipe section connects to different feeding bins. This configuration maximizes the applicability of the material guiding device, allowing the use of any number of feeding bins.

[0010] Preferably, a rotating shaft is fixedly installed at the bottom of the junction between the straight pipe section and the inclined pipe section. The rotating shaft is coaxially arranged with the straight pipe section and rotatably mounted on the material guide support; the material guide drive device is connected to the rotating shaft for transmission. This arrangement ensures the rotational stability of the material guide pipe.

[0011] Preferably, a screen is installed above the straight pipe section, and the screen has clearance holes for the discharge port to be inserted. The screen is installed to prevent carbon black from flying away during its descent.

[0012] Preferably, an annular receiving trough is also fixedly installed on the material guide support. Multiple funnel-shaped receiving ports are evenly distributed at the bottom of the receiving trough. The discharge end of the inclined tube section rotates around the inner wall of the receiving trough and connects to different receiving ports. The bottom of each receiving port connects to a feeding bin. This design restricts the rotation of the inclined tube section, while the funnel-shaped receiving ports facilitate the feeding bin's reception of carbon black.

[0013] After adopting the above technical solution, the beneficial effects of this utility model are:

[0014] This invention provides a mixing and feeding device that solves the problems of existing mixing and feeding devices where product variations occur due to batch changes in carbon black, and the inability to achieve precise weighing and batch addition. This invention achieves a pre-mixing effect for carbon black, reducing batch-to-batch variations. Simultaneously, it enables precise weighing and allows for the separate storage and batch addition of weighed carbon black, significantly improving the dispersion level of the carbon black, thereby enhancing the mixing effect and the performance of the finished product. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a mixing and feeding device according to the present invention;

[0016] Figure 2 yes Figure 1 Schematic diagram of the internal structure of the stirrer;

[0017] Figure 3 This is a schematic diagram of the material guiding device;

[0018] Figure 4 yes Figure 3 A schematic diagram of the internal structure.

[0019] In the diagram, 1 is the powder silo, 11 is the feed inlet, 12 is the discharge outlet, 121 is the discharge valve, 2 is the metering hopper, 21 is the discharge port, 3 is the feeding hopper, 31 is the unloading valve, 4 is the agitator, 41 is the pipe body, 411 is the mixing inlet, 412 is the mixing outlet, 42 is the mixing device, 421 is the mixing blade, 5 is the screw feeder, 6 is the material guiding device, 61 is the material guiding support, 62 is the material guiding pipe, 621 is the straight pipe section, 622 is the inclined pipe section, 623 is the rotating shaft, 63 is the material guiding drive device, 64 is the receiving trough, and 641 is the receiving port. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] The orientations mentioned in this specification are based on the orientation of the mixing and feeding device of this utility model during normal operation, and do not limit the orientation during storage and transportation. They only represent relative positional relationships and do not represent absolute positional relationships.

[0022] like Figure 1 As shown, a mixing and feeding device includes a powder silo 1 for storing carbon black, a weighing hopper 2 for weighing, and a feeding silo 3 for temporarily storing the weighed carbon black. As an improvement on the prior art, the powder silo 1 and the weighing hopper 2 are connected in sequence by a stirrer 4 and a screw feeder 5.

[0023] The specific structure is as follows: the powder silo 1 is provided with an inlet 11 and an outlet 12, and the outlet 12 is provided with an outlet valve 121. Multiple powder silos 1 are arranged side by side; in this embodiment, there are two powder silos 1, and the two powder silos 1 are used to hold different batches of carbon black.

[0024] like Figure 1 and Figure 2 As shown, the outlet 12 of the powder silo 1 is connected to a stirrer 4. The stirrer 4 includes a tube 41 and a stirring device 42 rotatably installed inside the tube 41. Multiple stirring inlets 411 are provided above the tube 41, and each stirring inlet 411 is connected to an outlet 12. A stirring outlet 412 is provided at the bottom of the tube 41.

[0025] The stirring device 42 includes a stirring blade 421 rotatably mounted inside the tube body 41 and a stirring drive device fixed to the outside of the tube body 41 and connected to the stirring blade 421 for transmission. In this embodiment, the stirring blade 421 includes multiple vertically connected spiral blades, with adjacent vertical spiral blades staggered end-to-end. When the staggered spiral blades rotate, they can cut and mix the powder multiple times, thereby improving the mixing and dispersing effect. The central shaft of the stirring blade 421 extends out of the top of the tube body 41 and is fixed with a driven gear. In this embodiment, the stirring drive device is a motor (not shown in the figure). A drive gear is fixed on the output shaft of the motor, and the drive gear is connected to the driven gear for transmission. The rotation of the motor drives the rotation of the stirring blade 421, thereby mixing and stirring the powder entering the stirrer 4.

[0026] In this improvement, multiple powder silos 1 are set up, and different batches of carbon black are put into different powder silos 1. When the remaining amount in one powder silo 1 reaches the set value, the other powder silo 1 is opened, and material is added from both powder silos 1 at the same time. The carbon black in the two powder silos 1 enters the agitator 4 together, and the agitator 4 achieves real-time online mixing; eliminating the differences between the two batches of carbon black and improving the stability of the product.

[0027] The mixing outlet 412 is connected to a screw feeder 5, and the discharge end of the screw feeder 5 is connected to the metering hopper 2. In order to prevent carbon black from flying, a corrugated hose is installed between the screw feeder 5 and the metering hopper 2.

[0028] The screw feeder 5 has a deep screw groove, which helps to push out carbon black for precise weighing. This allows the carbon black to fall slowly into the weighing hopper 2, avoiding a coarse graduation that would result in low weighing accuracy.

[0029] like Figure 1 , Figure 3 and Figure 4 As shown in the figure, there are multiple feeding bins 3, and the metering hopper 2 is connected to different feeding bins 3 through the material guiding device 6.

[0030] In this embodiment, six feeding bins 3 are provided, but in actual applications, three or four can also be provided. The guiding device 6 can be a baffle plate, that is, a left-right swinging baffle plate is provided at the bottom of the discharge port 21 of the metering hopper 2. By rotating and swinging the baffle plate, different feeding bins 3 can be connected.

[0031] In this embodiment, to increase the versatility of the material guiding device 6, the material guiding device 6 includes a material guiding bracket 61, a material guiding tube 62 rotatably mounted on the material guiding bracket 61, and a material guiding drive device 63 for driving the material guiding tube 62 to rotate. The material guiding tube 62 includes a vertically downward straight tube section 621 and an inclined tube section 622. A rotating shaft 623 is fixedly mounted at the bottom of the junction of the straight tube section 621 and the inclined tube section 622. The rotating shaft 623 is coaxial with the straight tube section 621. The rotating shaft 623 is rotatably mounted on the material guiding bracket 61. The material guiding drive device 63 is connected to the rotating shaft 623 for transmission. In this embodiment, the material guiding drive device 63 is a motor. The motor is fixed to the bottom of the material guiding bracket 61, and the rotating shaft 623 is rotatably mounted on the material guiding bracket 61 and extends downward through the material guiding bracket 61 and is fixedly connected to the output shaft of the motor.

[0032] The discharge port 21 of the metering hopper 2 is inserted into the straight pipe section 621; the weighed carbon black falls from the discharge port 21 into the straight pipe section 621; a discharge valve is installed on the discharge port 21. The feeding bins 3 are evenly distributed around the same diameter of the guide support 61. By rotating the guide pipe 62, the discharge end of the guide pipe 62 is connected to different feeding bins 3. To prevent the carbon black from the metering hopper 2 from flying out when it falls into the straight pipe section 621, a cover screen is installed above the straight pipe section 621. The cover screen has clearance holes for the discharge port 21 to be inserted.

[0033] An annular receiving groove 64 is also fixedly installed on the material guide bracket 61. Multiple funnel-shaped receiving ports 641 are evenly arranged at the bottom of the receiving groove 64. The discharge end of the inclined tube section 622 rotates around the inner side wall of the receiving groove 64 and connects to different receiving ports 641. The bottom of each receiving port 641 is connected to a feeding bin 3. A discharge valve 31 is provided at the bottom of the feeding bin 3.

[0034] Sufficient carbon black is weighed out at once by the metering hopper 2. The material guiding drive device 63 drives the material guiding pipe 62 to rotate, and the carbon black in the metering hopper 2 is evenly injected into different feeding bins 3 for compartmentalization and isolation. According to the design process, different feeding bins 3 are opened at specific times to feed the material separately and multiple times.

[0035] like Figure 1 , Figure 2 , Figure 3 and Figure 4 The working process of a mixing and feeding device:

[0036] Different batches of carbon black are placed into different powder silos 1. First, one powder silo 1 is opened, and the carbon black passes through the agitator 4. When the remaining amount in one powder silo 1 reaches the set value, the other powder silo 1 is opened, and feeding begins simultaneously from both powder silos 1. The carbon black in both powder silos 1 enters the agitator 4 together. After being mixed and dispersed by the agitator 4, the carbon black enters the screw feeder 5. The screw feeder 5 slowly adds the carbon black into the metering hopper 2 for accurate weighing. The accurately weighed carbon black is then injected into different feeding hoppers 3 through the feeding device 6. According to the design process, different feeding hoppers 3 are opened at specific times for separate and multiple feedings.

[0037] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A mixing and feeding device, comprising a powder silo for storing carbon black, a weighing hopper for weighing, and a feeding silo for temporary weighing, characterized in that: The powder silo and the metering hopper are connected in sequence by a stirrer and a screw feeder. The powder silos are provided in multiple ways, and the discharge ports of the multiple powder silos are connected in parallel to the mixing inlet of the agitator; each discharge port is provided with a discharge valve; The mixing outlet of the agitator is connected to the screw feeder, and the discharge end of the screw feeder is connected to the metering hopper; The feeding bins are provided in multiple ways, and each feeding bin is equipped with a discharge valve at the bottom; the metering hopper is connected to different feeding bins through a material guiding device.

2. The mixing and feeding device according to claim 1, characterized in that: The agitator includes a tube body and a stirring device rotatably installed inside the tube body; the upper end of the tube body is provided with the stirring inlet, and the lower end of the tube body is provided with the stirring outlet; there are multiple stirring inlets, and each stirring inlet is connected to a powder hopper.

3. The mixing and feeding device according to claim 2, characterized in that: The stirring device includes a stirring blade rotatably installed inside the tube and a stirring drive device fixed to the outside of the tube and connected to the stirring blade for transmission; the stirring blade includes multiple spiral blades connected vertically, with adjacent spiral blades staggered end to end.

4. The mixing and feeding device according to claim 1, characterized in that: A corrugated hose is provided between the screw feeder and the metering hopper.

5. The mixing and feeding device according to claim 1, characterized in that: The material guiding device includes a material guiding bracket, a material guiding tube rotatably mounted on the material guiding bracket, and a material guiding drive device for driving the material guiding tube to rotate. The feed pipe includes a vertically downward straight pipe section and an inclined pipe section from top to bottom; the discharge port of the metering hopper is inserted into the straight pipe section; The feeding bins are evenly distributed around the same diameter of the material guide support. By rotating, the discharge end of the inclined tube section is connected to different feeding bins.

6. The mixing and feeding device according to claim 5, characterized in that: A rotating shaft is fixedly installed at the bottom of the junction of the straight pipe section and the inclined pipe section. The rotating shaft is coaxially arranged with the straight pipe section and rotatably installed on the material guide bracket. The material guide drive device is connected to the rotating shaft.

7. The mixing and feeding device according to claim 5, characterized in that: A cover net is installed above the straight pipe section, and the cover net has clearance holes for the discharge port to be inserted.

8. The mixing and feeding device according to claim 5, characterized in that: The material guide bracket is also fixedly installed with an annular receiving groove. The bottom of the receiving groove is evenly provided with a plurality of funnel-shaped receiving ports. The discharge end of the inclined tube section rotates around the inner side wall of the receiving groove and connects to different receiving ports. The bottom of each receiving port is connected to a feeding bin.

Images