Ceramic microsphere embryo batch forming equipment and preparation method

Abstract

The application discloses a kind of ceramic microsphere embryo batch forming equipment, including granulating box and cyclone separator, the granulating box is provided with suspension bed, the suspension bed surface is provided with air hole, the suspension bed below is hot air chamber, the suspension bed top is forming chamber, the hot air chamber is connected with hot air generator, the forming chamber top is provided with centrifugal granulator, the centrifugal granulator is connected with hopper, the forming chamber is also connected with the air inlet of cyclone separator by pipeline, the discharge port of cyclone separator is connected with receiving tank, the air outlet of cyclone separator is connected with induced draft fan;A preparation method is also disclosed, which can be batch collected by atomization forming.The application has low preparation difficulty, greatly improves the preparation yield, and has high efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ceramic bearing microsphere preparation, in particular to a ceramic microsphere embryo batch forming equipment and a preparation method. BACKGROUND

[0002] The ceramic microsphere bearing is a bearing used in a precise environment, and based on the characteristics of ceramics, the precise size and accurate fit can be maintained in a temperature changing working environment, so that good running experience is ensured in a micro movement operation environment. Among them, the ceramic microsphere bearing is extremely common in dental drill tools.

[0003] In the ceramic microsphere bearing, the ceramic microsphere is one of the important components, and the ceramic microsphere is prepared by using ceramic powder. In the prior art, the ceramic powder is mixed with auxiliary preparation to form a liquid, and then the liquid is granulated. After granulation, the blank is pressed into a blank by a mold, and the blank is sintered into a shape.

[0004] In the above technical means, the blank needs to be pressed by a mold, and the number of each pressing forming is not much and the time is long, so that the ceramic microsphere cannot be mass produced, and when preparing blanks of different diameters, the mold needs to be replaced, which greatly increases the preparation cost. SUMMARY

[0005] The present application solves the above technical problems and provides a ceramic microsphere embryo batch forming equipment and a preparation method, which has low preparation difficulty, greatly improves the preparation yield, and has high efficiency.

[0006] In order to solve the above technical problems, the present application provides a ceramic microsphere embryo batch forming equipment, which comprises a granulating box and a cyclone separator, a suspension bed is arranged in the granulating box, air holes are formed on the surface of the suspension bed, a hot air chamber is arranged below the suspension bed, a forming chamber is arranged above the suspension bed, the hot air chamber is connected with a hot air generator, a centrifugal granulator is arranged on the top of the forming chamber, the centrifugal granulator is connected with a hopper, the forming chamber is also connected with the air inlet of the cyclone separator through a pipeline, the discharge port of the cyclone separator is connected with a material collecting box, and the air outlet of the cyclone separator is connected with an air induction fan.

[0007] The hopper is provided with ceramic slurry, and the centrifugal granulator atomizes the ceramic slurry into particulate matter in the forming chamber.

[0008] Further, the ceramic slurry comprises alcohol, ceramic powder and colloid, and the alcohol, ceramic powder and colloid are uniformly mixed to obtain the ceramic slurry.

[0009] Further, an adapter disc is arranged on the lower outlet of the cyclone separator, a material extractor is arranged on the adapter disc, a CCD camera and a light source are arranged on the material extractor, the material extractor is used for capturing and releasing the ceramic microsphere embryo discharged from the lower outlet, and the CCD camera and the light source cooperate to take images of the ceramic microsphere embryo in the material extractor.

[0010] Further, the images taken by the CCD camera are identified, and the diameters of the ceramic microsphere embryo identified in the images are measured.

[0011] Further, the material extractor comprises a material extraction pipe, one end of the material extraction pipe is connected with the CCD camera, the other end of the material extraction pipe is provided with an execution pipe, the inner diameter of the execution pipe is smaller than the inner diameter of the material extraction pipe, an end plate is arranged at the end of the execution pipe, a guide sleeve is arranged on the end plate, the guide sleeve is sleeved on a guide column, one end of the guide column is arranged outside the execution pipe and connected with a first limiting plate, a first spring is fixedly arranged on the first limiting plate and sleeved on the guide column, the other end of the guide column is arranged in the execution pipe and connected with a second limiting plate, a second spring is fixedly arranged on the second limiting plate and sleeved on the guide column, a sealing rubber ring is further arranged around the second limiting plate, the sealing rubber ring is sealed with the inner wall of the execution pipe, a material through hole is further arranged on the end of the execution pipe, and a gas pipe joint is further arranged on the material extraction pipe, the gas pipe joint is connected with a first electromagnetic valve and a second electromagnetic valve through a gas pipe, the first electromagnetic valve is connected with a vacuum pipe, and the second electromagnetic valve is connected with a high-pressure pipe.

[0012] Further, a third limiting plate is arranged on the end of the first limiting plate where the guide sleeve is located, the third limiting plate can abut against the first spring, and a variable diameter part is arranged between the material extraction pipe and the execution pipe.

[0013] Further, a retaining ring is arranged around the centrifugal granulator, and the retaining ring is fixedly connected with the top of the forming chamber.

[0014] Further, the suspension bed is arranged to be inclined, and the air holes on the surface of the suspension bed are arranged in a spiral direction.

[0015] A preparation method, which adopts the forming equipment described above, places ceramic slurry in the hopper, starts the hot air generator and the air blower, heats and provides suspension force for the granulation box by the hot air generator, starts the centrifugal granulator after the temperature of the granulation box is stable, atomizes the ceramic slurry in the hopper into particulate matter, the particulate matter falls by gravity to the upper side of the suspension bed for drying, the weight of the particulate matter decreases after the drying is completed, the suspension height rises, and the particulate matter is introduced into the cyclone separator, the cyclone separator separates the particulate matter from the gas and discharges the particulate matter from the lower outlet, and the ceramic microsphere embryo is obtained.

[0016] Further, the distance between the falling particles and the suspension bed is observed to adjust the air speed of the hot air generator; the diameter of the ceramic microsphere embryo is detected to adjust the speed and flow of the centrifugal granulator and the air speed of the hot air generator.

[0017] Advantages of the present application:

[0018] 1. The ceramic slurry is scattered into droplets by the centrifugal granulator, and the droplets gradually shrink into ball particles under the action of surface tension during the falling process. Furthermore, the shrinking ball particles can be suspended above the suspension bed and dried by the suspension bed combined with the hot air generator. The particles can be continuously and uninterruptedly prepared without mold pressing, while ensuring the spherical shape, which greatly improves the preparation speed.

[0019] 2. The cyclone separator can effectively collect the continuously produced particles, with high efficiency and good preparation effect. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the overall structure schematic diagram of the present application;

[0021] Figure 2 is the cross-sectional structure schematic diagram of the present application; Figure 1

[0022] Figure 3 is the enlarged schematic diagram of the material collecting part structure of the present application;

[0023] Figure 4 is the schematic diagram of the material taking pipe structure of the present application;

[0024] Figure 5 is the cross-sectional structure schematic diagram of the material taking pipe when not working of the present application;

[0025] Figure 6 is the cross-sectional structure schematic diagram of the material taking pipe when capturing embryo of the present application;

[0026] Figure 7 is the cross-sectional structure schematic diagram of the material taking pipe when releasing embryo of the present application. DETAILED DESCRIPTION

[0027] The present application will be further described below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present application and implement it, but the embodiments are not limiting the present application.

[0028] Reference Figure 1 and Figure 2 ​As shown, an embodiment of the batch forming equipment for ceramic microsphere green bodies of the present application includes a granulation box 1 and a cyclone separator 2. The granulation box is provided with a suspension bed 3. The surface of the suspension bed is provided with air holes 4. The suspension bed is below a hot air chamber 5. The suspension bed is above a forming chamber 6. The hot air chamber is connected with a hot air generator 7. A second valve is provided between the hot air chamber and the hot air generator for controlling the flow of hot air. The hot air generator can be tangentially arranged into the hot air chamber. The top of the forming chamber is provided with a centrifugal granulator 8. The centrifugal granulator is connected with a hopper 9. The hopper is provided with ceramic slurry. A fourth valve is provided between the centrifugal granulator and the hopper for controlling the flow of ceramic slurry. The centrifugal granulator is used to atomize the ceramic slurry into particles in the forming chamber. The forming chamber is further connected with the air inlet of the cyclone separator through a pipeline 10. A third valve is provided on the pipeline for controlling the on-off between the granulation box and the cyclone separator. The discharge port of the cyclone separator is connected with a collecting box 11. A first valve is provided on the discharge port. The air outlet of the cyclone separator is connected with an induced draft fan 12.

[0029] Specifically, the above forming equipment is used to manufacture the size range of 0.5-3mm of the ball blank particles. In use, the first valve and the fourth valve are closed. The opening degree of the second valve and the third valve can be 30%. Then the induced draft fan and the hot air generator are started. The hot air generator includes a hot air fan and a heat generating module. The temperature of the hot air generator is adjustable between 70-90℃, which is convenient for the flexibility of the equipment in process adjustment.

[0030] After the hot air flow in the system is stable, the ceramic slurry prepared in advance is poured into the hopper. The ceramic slurry is uniformly mixed by alcohol, ceramic powder and colloid. The weight ratio of alcohol to ceramic powder is 0.5-1:1. The colloid content is 1-3% of the total weight of the ceramic powder. It has a large viscosity and can form large particles. Of course, a surfactant can also be added to the above ceramic slurry to improve the flow performance of the ceramic slurry. Then the centrifugal granulator is started. The centrifugal granulator includes a granulation motor and a balling disc. The atomization motor speed range is 60-300 revolutions per minute. The first valve is opened and adjusted so that the ceramic slurry flows into the balling disc. The balling disc scatters the ceramic slurry into droplets by the action of centrifugal force. The droplets gradually shrink into ball blank particles under the action of surface tension during the falling process. In the process of falling, the ball blank particles lose about 60% of the alcohol solvent under the blowing of the hot air below. When the ball blank particles fall near the suspension bed, the blowing force of the hot air below increases. In addition, the volume of the ball blank particles becomes lighter after losing the alcohol solvent. Thus, the ball blank particles can be suspended on the suspension bed for further drying. The ball blank particles will lose the remaining 40% of the alcohol solvent.

[0031] In the process, the suspension state of the ball blank particles can be observed through the observation window on the granulation box. If the suspension force is not enough, the opening of the second valve and the third valve is increased, and the air inlet pressure is increased. Otherwise, the opening of the second valve and the third valve is reduced, that is, the spacing between the falling particles and the suspension bed is observed to adjust the air speed of the hot air generator. When adjusting the air speed, the flow regulation of the pipeline between the forming chamber and the cyclone separator can assist the suspension.

[0032] After the ball blank particles to be suspended on the drying bed are completely dried, they will enter the cyclone collector with the airflow due to the weight loss. In the cyclone collector, gas-solid separation is completed, the fourth valve is opened, and the ball blank particles fall into the material collection box to obtain the ceramic microsphere embryo. That is, the diameter of the ceramic microsphere embryo is detected to adjust the speed and flow of the centrifugal granulator and the air speed of the hot air generator. When adjusting the air speed, the flow regulation of the pipeline between the forming chamber and the cyclone separator can assist the suspension.

[0033] During the production process, the particle size condition in the material collection box needs to be observed at any time. If the ball blank particles are smaller than required, the feeding amount of the first valve is increased, the centrifugal granulator speed is reduced, and the opening of the second valve and the third valve is increased to increase the hot air supply, so as to ensure the stable operation of the system. Conversely, the same is true.

[0034] Due to the need to observe the particle size condition in the material collection box at any time, as shown in Figure 3 The adapter disc 13 is designed on the discharge port of the cyclone separator, the material extractor 14 is arranged on the adapter disc, the CCD camera 15 and the light source are arranged on the material extractor, the material extractor is used to capture and release the ceramic microsphere embryo discharged from the discharge port, the CCD camera and the light source cooperate to take images of the ceramic microsphere embryo in the material extractor, the light source can be an external structure or an integral structure with the CCD camera, which meets the exposure requirement during shooting. The ceramic microsphere embryo discharged from the discharge port is captured by the material extractor, the CCD camera and the light source cooperate to image and save the image, the image is identified, the diameter of the identified ceramic microsphere embryo in the image is measured, the particle size condition in the material collection box can be observed quickly and at any time, the image can be stored, the image is associated with time, the particle size change of the ceramic microsphere embryo in the continuous preparation process is analyzed according to multiple interval identifications, the process parameters are further adjusted, and the parameters can be adjusted as soon as possible to improve the yield and reduce the production of defective products according to the trend change when the ceramic microsphere embryo is qualified but tends to be poor. After the identification is completed, the captured ceramic microsphere embryo is released by the material extractor to ensure that there is no residue in the material extractor during the next capture, so as to ensure the accuracy of the data.

[0035] Specifically, refer to Figure 4 to Figure 7As shown, the material taking device includes a material taking pipe 16 connected with the CCD camera at one end and provided with an execution pipe 17 at the other end, the inner diameter of the execution pipe is smaller than that of the material taking pipe, the end of the execution pipe is provided with an end plate 18, the end plate is provided with a guide sleeve 19, the guide sleeve is sleeved on a guide column 20, one end of the guide column is provided outside the execution pipe and connected with a first limiting plate 21, the first limiting plate is fixedly provided with a first spring 22, the first spring is sleeved on the guide column, the other end of the guide column is provided inside the execution pipe and connected with a second limiting plate 23, the second limiting plate is fixedly provided with a second spring 24, the second spring is sleeved on the guide column, the second limiting plate is further provided with a sealing rubber ring 25 around the periphery, the sealing rubber ring is sealed with the inner wall of the execution pipe, the end of the execution pipe is further provided with a material through hole 26, the material taking pipe is further provided with an air pipe joint 27, the air pipe joint is connected with a first electromagnetic valve and a second electromagnetic valve through an air pipe, the first electromagnetic valve is connected with a vacuum pipeline, and the second electromagnetic valve is connected with a high-pressure pipeline.

[0036] The material taking device can be inclined, and the material through hole is arranged below or close to the discharge port to facilitate capture. Referring to Figure 5 As shown, it is a state diagram when the material taking device does not capture, wherein the second limiting plate is located inside the execution pipe, the inner wall of the execution pipe is attached to the sealing rubber ring to play a blocking role, and the ceramic microsphere embryo cannot enter the material taking pipe.

[0037] When it is necessary to detect the particle size, referring to Figure 6 As shown, the first electromagnetic valve is opened, the material taking pipe is vacuumized, and a negative pressure is formed in the material taking pipe. Since the inner wall of the execution pipe is attached to the sealing rubber ring to be sealed, the second limiting plate is pushed by the pressure difference to move towards the material taking pipe, and the first limiting plate is moved through the guide column. In the moving process, the first limiting plate limits and compresses the first spring to store power. When the second limiting plate moves into the material taking pipe, the sealing rubber ring cannot form a sealing effect with the inner wall of the material taking pipe, so the vacuum negative pressure is broken. At the moment of breaking, the ceramic microsphere embryo is sucked from the material through hole and enters the material taking pipe through the gap between the sealing rubber ring and the material taking pipe. The first electromagnetic valve is closed, and the first spring is reset to release the deformation force. At the same time, the second limiting plate returns to the execution pipe, and the inner wall of the execution pipe is attached to the sealing rubber ring to be sealed. The external ceramic microsphere embryo cannot enter the material taking pipe, and the captured ceramic microsphere embryo is used for detection.

[0038] After the detection is completed, the ceramic microsphere embryo in the material taking pipe needs to be discharged. Referring to Figure 7As shown, the second electromagnetic valve is opened, the pressure in the material taking pipe is increased, the second limiting plate is pushed to move away from the material taking pipe due to the sealing of the wall of the execution pipe and the sealing rubber ring, in the moving process, the second spring is compressed to store energy, after the second limiting plate moves to the material through hole, the captured ceramic microsphere embryo is pressed out of the material taking pipe and discharged through the material through hole, then the second electromagnetic valve is closed, the second spring is reset to release the deformation force, and the reset simultaneously extrudes the second limiting plate back to the execution pipe, that is, the state when the material taking device does not capture.

[0039] The action stroke of the first spring and the second spring can ensure that the second limiting plate moves into the execution pipe. In order to reduce the length of the first spring, a third limiting plate 28 is arranged on the end of the first limiting plate in the guide sleeve, which can abut against the first spring to avoid the problem that the action force direction is not clear due to the excessive length, and affect the moving effect. A reducing portion 29 is arranged between the material taking pipe and the execution pipe, which plays a guiding role, facilitates the ceramic microsphere embryo to enter the material taking pipe, avoids the problem that the ceramic microsphere embryo is impacted due to too fast capturing speed, reduces the impact times and impact intensity, and ensures the integrity of the ceramic microsphere embryo.

[0040] In an embodiment, a baffle 30 is arranged around the centrifugal granulator, and the baffle is fixedly connected to the top of the forming chamber. The baffle can ensure that the droplets can quickly fall during the operation of the centrifugal granulator and are not affected by the airflow of the cyclone separator.

[0041] In an embodiment, the suspension bed is arranged to be inclined, and the inclination angle is between 5-10 degrees. After the suspension bed is arranged to be inclined, the dry embryo can be guided to the cyclone separator. The air holes on the surface of the suspension bed are arranged in a spiral direction. After the hot air is blown into the forming chamber, a rotating airflow can be formed. In the process of drying, the ceramic microsphere embryo is guided to move in the same direction, so that deformation or adhesion caused by collision before drying and solidification is avoided.

[0042] The present application can be applied to the molding of ceramic bearing microspheres with a diameter of 0.1-1.5mm. According to the required product particle size requirements, the slurry viscosity, the centrifugal granulator speed, the hot air temperature and the input amount, and the air volume of the air blower can be systematically adjusted to realize continuous and stable production of corresponding specifications. When the specifications are replaced, the components do not need to be replaced, only the parameters need to be adjusted, the preparation cost is greatly reduced, and batch production can be realized.

[0043] The above embodiments are only used to illustrate the technical solutions of the present application, but not intended to limit the present application; even though the present application has been described in detail with reference to the foregoing embodiments, those ordinarily skilled in the art should understand: the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A batch forming equipment for ceramic microsphere preforms, characterized in that, The granulation box is provided with a suspension bed, the surface of the suspension bed is provided with air holes, the lower part of the suspension bed is a hot air chamber, the upper part of the suspension bed is a forming chamber, the hot air chamber is connected with a hot air generator, the top of the forming chamber is provided with a centrifugal granulator, the centrifugal granulator is connected with a hopper, the forming chamber is also connected with the air inlet of a cyclone separator through a pipeline, the discharge outlet of the cyclone separator is connected with a material collecting box, and the air outlet of the cyclone separator is connected with an air blower. The hopper is provided with ceramic slurry, and the centrifugal granulator atomizes the ceramic slurry into particles in the forming chamber. The discharge outlet of the cyclone separator is provided with an adapter disc, the adapter disc is provided with a material taking device, the material taking device is provided with a CCD camera and a light source, the material taking device is used for capturing and releasing the ceramic microsphere embryo discharged from the discharge outlet, and the CCD camera and the light source cooperate to take images of the ceramic microsphere embryo in the material taking device. The material taking device comprises a taking pipe, one end of the taking pipe is connected with the CCD camera, the other end of the taking pipe is provided with an execution pipe, the inner diameter of the execution pipe is smaller than that of the taking pipe, the end of the execution pipe is provided with an end plate, the end plate is provided with a guide sleeve, the guide sleeve is sleeved on a guide column, one end of the guide column is arranged outside the execution pipe and connected with a first limiting plate, the first limiting plate is fixedly provided with a first spring, the first spring is sleeved on the guide column, the other end of the guide column is arranged in the execution pipe and connected with a second limiting plate, the second limiting plate is fixedly provided with a second spring, the second spring is sleeved on the guide column, the periphery of the second limiting plate is further provided with a sealing rubber ring, the sealing rubber ring is sealed in cooperation with the inner wall of the execution pipe, the end of the execution pipe is further provided with a material through hole, the taking pipe is further provided with an air pipe joint, the air pipe joint is connected with a first electromagnetic valve and a second electromagnetic valve through an air pipe, the first electromagnetic valve is connected with a vacuum pipeline, and the second electromagnetic valve is connected with a high-pressure pipeline.

2. The apparatus for batch forming of ceramic microsphere green bodies of claim 1, wherein, The ceramic slurry comprises alcohol, ceramic powder and colloid.

3. The apparatus for batch forming of ceramic microsphere green bodies of claim 1, wherein, The images taken by the CCD camera are identified, and the diameters of the ceramic microsphere embryos identified in the images are measured.

4. The apparatus for batch forming of ceramic microsphere green bodies of claim 1, wherein, The third limiting plate is arranged on the end of the first limiting plate, and the third limiting plate can abut against the first spring.

5. The apparatus for batch forming of ceramic microsphere green bodies of claim 1, wherein, The centrifugal granulator is provided with a retaining ring around the periphery, and the retaining ring is fixedly connected with the top of the forming chamber.

6. The apparatus for batch forming of ceramic microsphere green bodies of claim 1, wherein, The suspension bed is arranged in an inclined manner, and the air holes on the surface of the suspension bed are arranged in a spiral direction. The granulation box is provided with a suspension bed, the surface of the suspension bed is provided with air holes, the lower part of the suspension bed is a hot air chamber, the upper part of the suspension bed is a forming chamber, the hot air chamber is connected with a hot air generator, the top of the forming chamber is provided with a centrifugal granulator, the centrifugal granulator is connected with a hopper, the forming chamber is also connected with the air inlet of a cyclone separator through a pipeline, the discharge outlet of the cyclone separator is connected with a material collecting box, and the air outlet of the cyclone separator is connected with an air blower. The hopper is provided with ceramic slurry, and the centrifugal granulator atomizes the ceramic slurry into particles in the forming chamber. The discharge outlet of the cyclone separator is provided with an adapter disc, the adapter disc is provided with a material taking device, the material taking device is provided with a CCD camera and a light source, the material taking device is used for capturing and releasing the ceramic microsphere embryo discharged from the discharge outlet, and the CCD camera and the light source cooperate to take images of the ceramic microsphere embryo in the material taking device. The material taking device comprises a taking pipe, one end of the taking pipe is connected with the CCD camera, the other end of the taking pipe is provided with an execution pipe, the inner diameter of the execution pipe is smaller than that of the taking pipe, the end of the execution pipe is provided with an end plate, the end plate is provided with a guide sleeve, the guide sleeve is sleeved on a guide column, one end of the guide column is arranged outside the execution pipe and connected with a first limiting plate, the first limiting plate is fixedly provided with a first spring, the first spring is sleeved on the guide column, the other end of the guide column is arranged in the execution pipe and connected with a second limiting plate, the second limiting plate is fixedly provided with a second spring, the second spring is sleeved on the guide column, the periphery of the second limiting plate is further provided with a sealing rubber ring, the sealing rubber ring is sealed in cooperation with the inner wall of the execution pipe, the end of the execution pipe is further provided with a material through hole, the taking pipe is further provided with an air pipe joint, the air pipe joint is connected with a first electromagnetic valve and a second electromagnetic valve through an air pipe, the first electromagnetic valve is connected with a vacuum pipeline, and the second electromagnetic valve is connected with a high-pressure pipeline. The ceramic slurry comprises alcohol, ceramic powder and colloid. The images taken by the CCD camera are identified, and the diameters of the ceramic microsphere embryos identified in the images are measured. The third limiting plate is arranged on the end of the first limiting plate, and the third limiting plate can abut against the first spring. The centrifugal granulator is provided with a retaining ring around the periphery, and the retaining ring is fixedly connected with the top of the forming chamber. The suspension bed is arranged in an inclined manner, and the air holes on the surface of the suspension bed are arranged in a spiral direction.

7. A method of manufacture, characterized by, The ceramic slurry is put into the hopper, the hot air generator and the air blower are started, the hot air generator heats the granulation box and provides the suspension force, after the temperature of the granulation box is stable, the centrifugal granulator is started, the ceramic slurry in the hopper is atomized into granular matters, the granular matters fall by gravity to the upper side of the suspension bed for drying, after the drying is finished, the weight of the granular matters decreases, the suspension height rises and the granular matters are introduced into the cyclone separator, the cyclone separator separates the granular matters from the gas and discharges from the discharge port, and the ceramic microsphere embryo is obtained.

8. The production method according to claim 7, wherein The distance between the granular matters and the suspension bed after falling is observed to adjust the air speed of the hot air generator; the diameter of the ceramic microsphere embryo is detected to adjust the speed and flow of the centrifugal granulator and adjust the air speed of the hot air generator.

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