A raw material mixing device for preparing an extinction film

Abstract

This application relates to the technical field of raw material mixing devices, and in particular to a raw material mixing device for preparing matte films, comprising a mixing chamber, a feeding assembly, a multi-layer stirring assembly, a power mechanism, and an auxiliary vibration module. The multi-layer stirring assembly drives the stirring disc to rotate via a main shaft, and through-holes on the arc-shaped blades promote raw material flow; the auxiliary vibration module utilizes an eccentric block to generate periodic vibrations to enhance the mixing effect; the feeding assembly achieves zoned feeding of raw materials through partitioned channels. This application can significantly improve the mixing uniformity and stability of various complex raw materials, and optimize the performance of matte film preparation.

Description

Technical Field

[0001] This utility model belongs to the technical field of polymer material processing equipment, specifically a raw material mixing device for the preparation of matte film. Background Technology

[0002] The preparation of matte films requires the mixing of various raw materials, necessitating the use of appropriate raw material mixing equipment. This equipment ensures the uniform mixing of different materials, providing a foundation for subsequent matte film preparation. However, existing raw material mixing equipment still has some shortcomings in practical applications. For example, current commercially available mixing equipment typically employs traditional stirring methods, which have low mixing efficiency and struggle to achieve uniform mixing of multiple complex raw materials. This results in unstable performance of the final matte film, especially under high-temperature or high-precision requirements, easily leading to problems such as uneven gloss and poor temperature resistance.

[0003] A search revealed a high-temperature matting masterbatch, its preparation method, and its application, published on August 27, 2024, with publication number CN117866335B. This invention relates to a method for preparing a high-temperature matting masterbatch, which, while providing a high melt index and excellent temperature resistance, does not address the specific design of the raw material mixing equipment. In actual production, using traditional mixing equipment for raw material proportioning may lead to performance fluctuations in the final product due to uneven mixing, especially when precise control of the component ratios is required.

[0004] A search revealed a coating device for double-sided matte packaging film processing, with publication number CN116550562B and publication date September 29, 2023. This invention provides a device for matte film coating, achieving intermittent and continuous double-sided coating operations through a spraying device structure design with an outer sleeve, a fixing tube, and a feeding tube. However, this design mainly focuses on improving the coating process and does not offer specific solutions for the uniformity and stability of the initial raw material mixing process. Furthermore, the complex design of its feeding mechanism may lead to increased maintenance costs and cannot meet the higher requirements for raw material mixing precision in certain special scenarios.

[0005] The aforementioned problems indicate that traditional raw material mixing devices currently on the market have certain limitations in addressing the new requirements for high-precision and uniform mixing in the preparation of matte films. Therefore, this invention provides a raw material mixing device for matte film preparation to overcome the shortcomings of existing technologies and offer a more intelligent, efficient, and adaptable solution to changing environments. This device will significantly improve the uniformity and stability of raw material mixing, thereby further optimizing the performance of the matte film. Utility Model Content

[0006] This invention provides a raw material mixing device for matte film preparation, aiming to solve the problem that existing raw material mixing devices struggle to achieve uniform mixing when dealing with various complex raw materials. To address this problem, this invention provides a raw material mixing device for matte film preparation, comprising: a mixing chamber mounted on a base for accommodating raw materials; a feeding assembly fixedly installed on the top of the mixing chamber, the feeding assembly having multiple independent partition channels for zoned feeding of different raw materials; a multi-layer stirring assembly rotatably installed inside the mixing chamber for agitating and mixing the raw materials; a power mechanism located at the bottom of the mixing chamber for driving the multi-layer stirring assembly to rotate; and an auxiliary vibration module located on the side wall of the mixing chamber for adjusting the mixing intensity.

[0007] Preferably, the multi-layer stirring assembly includes: a main shaft fixedly installed at the central axis of the mixing chamber, the main shaft penetrating the mixing chamber vertically; a first stirring plate and a second stirring plate fixedly sleeved on the main shaft, the first stirring plate being located in the upper region of the mixing chamber and the second stirring plate being located in the lower region of the mixing chamber; a plurality of arc-shaped blades fixedly connected to the outer edges of the first stirring plate and the second stirring plate, the surface of the arc-shaped blades having a plurality of through holes to promote the interactive flow between raw materials; and a conical guide cap fixedly installed at the top end of the main shaft, the conical guide cap being used to guide the raw materials from the feeding assembly into the interior of the mixing chamber.

[0008] Preferably, the power mechanism includes: a motor bracket fixedly installed at the bottom of the mixing chamber, on which a drive motor is mounted; a reducer connected to the output shaft of the drive motor via a coupling, the output end of the reducer being fixedly connected to the bottom end of the main shaft; and a protective cover fixedly installed on the outside of the reducer, the protective cover being used to prevent external impurities from entering the interior of the reducer.

[0009] Preferably, the auxiliary vibration module includes: a vibration generator fixedly installed on the side wall of the mixing chamber, the output end of the vibration generator extending into the mixing chamber; an eccentric block fixedly sleeved on the output end of the vibration generator, the eccentric block generating periodic vibrations during rotation; and an elastic support member disposed on the side wall of the mixing chamber, the elastic support member being used to absorb and buffer excess vibration force generated by the vibration generator.

[0010] Preferably, the feeding assembly includes: a feeding hopper fixedly installed on the top of the mixing chamber, wherein the feeding hopper is provided with a plurality of inclined partition plates to form a plurality of independent partition channels; a flow regulating valve fixedly installed on the partition plates, wherein the flow regulating valve is used to control the raw material flow rate in each partition channel; and a guide plate fixedly connected to the bottom of the feeding hopper, wherein the guide plate is used to evenly distribute the raw material on the cross-section of the mixing chamber.

[0011] Preferably, the inner wall of the mixing chamber is provided with multiple sets of protruding structures, which are evenly distributed along the circumference of the mixing chamber, and the height of each set of protruding structures gradually decreases from top to bottom to adapt to the mixing requirements at different stages; the surface of the protruding structures is coated with a wear-resistant coating to extend their service life.

[0012] Preferably, the base is provided with a leveling mechanism for adjusting the horizontal position of the mixing chamber. The leveling mechanism includes: threaded rods fixedly installed at the four corners of the base, the top end of the threaded rods being threadedly connected to the bottom of the mixing chamber; locking nuts fixedly sleeved on the threaded rods, the locking nuts being used to fix the position of the threaded rods; and casters fixedly installed at the bottom of the base, the casters being used to facilitate the overall movement of the mixing chamber.

[0013] Preferably, the bottom of the mixing chamber is provided with a discharge port, and the inner side of the discharge port is provided with a filter screen, which is used to intercept incompletely mixed raw material particles; a sealing cover is hinged to the outer side of the discharge port, and the sealing cover is elastically connected to the outer wall of the mixing chamber by a spring to realize the automatic opening and closing function.

[0014] Preferably, the top of the mixing chamber is provided with an observation window, which is made of transparent material and is used to monitor the state of the raw materials in real time during the mixing process; the edge of the observation window is provided with a sealing strip, which is used to prevent raw material leakage.

[0015] Preferably, a temperature sensor and a humidity sensor are provided on the side wall of the mixing chamber. The temperature sensor and the humidity sensor are respectively connected to the controller via data lines. The controller automatically adjusts the operating frequency of the vibration generator and the speed of the drive motor according to the detected environmental parameters.

[0016] Compared with existing technologies, the raw material mixing device for matte film preparation provided in this solution significantly improves the uniformity and stability of raw material mixing through the synergistic effect of a multi-layer stirring assembly, an auxiliary vibration module, and a feeding assembly. Specifically, the multi-layer stirring assembly drives the first and second stirring discs to rotate via a main shaft, while the through holes on the arc-shaped blades promote the vertical flow of the raw materials, thereby achieving thorough mixing in three-dimensional space. The auxiliary vibration module generates periodic vibration through the rotation of an eccentric block, further enhancing the collision and dispersion effect between the raw materials. The feeding assembly achieves precise feeding of different raw materials through a partitioned channel and a flow regulating valve, avoiding the problem of low mixing efficiency caused by uneven feeding in traditional mixing devices. In addition, the raised structure on the inner wall of the mixing chamber and the design of the filter screen further optimize the mixing effect, ensuring that the final matte film has more stable and reliable performance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention, showing the overall structure of the mixing device and the layout relationship of its main components.

[0018] Figure 2 This is a schematic diagram of the structure of the multi-layer stirring assembly in this utility model, showing in detail the specific arrangement of the main shaft, the first stirring plate, the second stirring plate, and the arc-shaped blades.

[0019] Figure 3 This is a top view of the feeding assembly in this utility model, showing the distribution of the dividing channel, flow regulating valve and guide plate.

[0020] Figure 4 This is a partially enlarged view of the auxiliary vibration module in this utility model, highlighting the installation positions of the vibration generator, eccentric block, and elastic support.

[0021] Figure 5 This is a truncated enlarged view of the present invention, showing the arrangement of the observation window, temperature sensor, and humidity sensor on the mixing cavity.

[0022] The attached figures are labeled as follows:

[0023] 1. Mixing chamber; 2. Feeding assembly; 3. Multi-layer mixing assembly; 4. Power mechanism; 5. Auxiliary vibration module; 6. Main shaft; 7. First mixing disc; 8. Second mixing disc; 9. Arc-shaped blades; 10. Conical guide cap; 11. Motor bracket; 12. Drive motor; 13. Reducer; 14. Protective cover; 15. Vibration generator; 16. Eccentric block; 17. Elastic support component; 18. Feed hopper; 19. Divider plate; 20. Flow regulating valve; 21. Guide plate; 22. Protruding structure; 23. Discharge port; 24. Filter screen; 25. Sealing cover; 26. Observation window; 27. Temperature sensor; 28. Humidity sensor; 29. ​​Leveling mechanism; 30. Threaded rod; 31. Locking nut; 32. Casters. Detailed Implementation

[0024] This invention provides a raw material mixing device for preparing matte films, the overall structure of which is as follows: Figure 1 As shown, the assembly includes a mixing chamber 1, a feeding assembly 2, a multi-layer stirring assembly 3, a power mechanism 4, and an auxiliary vibration module 5. These components work together through specific connections and positional arrangements to achieve efficient raw material mixing. The specific embodiments of this invention will be described in detail below with reference to the accompanying drawings.

[0025] The mixing chamber 1 is the core component of the entire device. Its main body is a closed cylindrical cavity, fixedly mounted on a base. A feeding assembly 2 is located at the top of the mixing chamber 1, a power mechanism 4 at the bottom, and an auxiliary vibration module 5 installed on the side walls. Multiple sets of protruding structures 22 are evenly distributed circumferentially along the inner wall of the mixing chamber 1. The height of these protruding structures 22 gradually decreases from top to bottom, and their surfaces are coated with a wear-resistant coating. A discharge port 23 is located at the bottom of the mixing chamber 1. A filter screen 24 is installed inside the discharge port 23, and a sealing cover 25 is hinged to the outside. The sealing cover 25 is elastically connected to the outer wall of the mixing chamber 1 by a spring. An observation window 26 is also provided at the top of the mixing chamber 1. The observation window 26 is made of transparent material and has a sealing strip around its edges. A temperature sensor 27 and a humidity sensor 28 are installed on the side walls of the mixing chamber 1, both connected to the controller via data cables. The base is equipped with leveling mechanisms 29 at its four corners. The leveling mechanism 29 includes a threaded rod 30 and a locking nut 31. Casters 32 are installed at the bottom of the base.

[0026] The feeding assembly 2 is fixedly installed on the top of the mixing chamber 1, and its specific structure is as follows: Figure 3As shown. The feeding assembly 2 includes a feeding bin 18, partition plates 19, flow regulating valves 20, and guide plates 21. Multiple independent partition channels are formed inside the feeding bin 18 by multiple inclined partition plates 19. Each partition channel is equipped with a flow regulating valve 20, which is fixed to the partition plate 19 by a threaded connection. The bottom of the feeding bin 18 is connected to the guide plate 21, which is fixed to the outlet of the feeding bin 18 by welding. The function of the guide plate 21 is to evenly distribute the raw material across the cross-section of the mixing chamber 1. The feeding assembly 2 is connected to the top of the mixing chamber 1 via a flange to ensure sealing and stability.

[0027] The multi-layer stirring assembly 3 is rotatably installed inside the mixing chamber 1, and its structure is as follows: Figure 2 As shown. The multi-layer stirring assembly 3 includes a main shaft 6, a first stirring plate 7, a second stirring plate 8, arc-shaped blades 9, and a conical guide cap 10. The main shaft 6 extends vertically through the mixing chamber 1, and the conical guide cap 10 is fixedly installed at its top end, connected to the main shaft 6 by bolts. The first stirring plate 7 and the second stirring plate 8 are fixedly sleeved in the middle of the main shaft 6. The first stirring plate 7 is located in the upper region of the mixing chamber 1, and the second stirring plate 8 is located in the lower region of the mixing chamber 1. Multiple arc-shaped blades 9 are fixedly connected to the outer edges of the first stirring plate 7 and the second stirring plate 8. Several through holes with a diameter of 3-5 mm and a spacing of 10-15 mm are opened on the surface of the arc-shaped blades 9. The main shaft 6 is connected to the top and bottom of the mixing chamber 1 by bearings to ensure stability during rotation.

[0028] The power mechanism 4 is fixedly installed at the bottom of the mixing chamber 1. Its structure includes a motor bracket 11, a drive motor 12, a reducer 13, and a protective cover 14. The motor bracket 11 is bolted to the bottom of the mixing chamber 1, and the drive motor 12 is bolted to the motor bracket 11. The output shaft of the drive motor 12 is connected to the input end of the reducer 13 via a coupling, and the output end of the reducer 13 is fixedly connected to the bottom end of the main shaft 6 via a keyway. The protective cover 14 is bolted to the outside of the reducer 13, and its function is to prevent external impurities from entering the reducer 13. The power mechanism 4 converts the high-speed rotation of the drive motor 12 into a low-speed, high-torque output through the reducer 13, thereby driving the main shaft 6 and its multi-layer stirring assembly 3 to rotate.

[0029] The auxiliary vibration module 5 is fixedly installed on the side wall of the mixing chamber 1, as shown in the enlarged view below. Figure 4As shown. The auxiliary vibration module 5 includes a vibration generator 15, an eccentric block 16, and an elastic support 17. The vibration generator 15 is fixed to the side wall of the mixing chamber 1 by bolts, and the output end of the vibration generator 15 extends into the interior of the mixing chamber 1. The eccentric block 16 is fixedly sleeved on the output end of the vibration generator 15 by a keyway, and the eccentric block 16 generates periodic vibrations during rotation. The elastic support 17 is fixed to the side wall of the mixing chamber 1 by bolts, and the function of the elastic support 17 is to absorb and buffer the excess vibration force generated by the vibration generator 15. The auxiliary vibration module 5 is linked with the temperature sensor 27 and the humidity sensor 28 through a controller, and automatically adjusts the vibration frequency according to the environmental parameters.

[0030] In actual operation, raw materials enter the mixing chamber 1 through the partitioned channels of the feeding assembly 2. The flow regulating valve 20 controls the flow rate of the raw materials in each partitioned channel to ensure the accuracy of feeding. After the raw materials are evenly distributed on the cross-section of the mixing chamber 1 by the guide plate 21, they fall into the interior of the mixing chamber 1. After the power mechanism 4 is started, the drive motor 12 drives the main shaft 6 to rotate through the reducer 13. The first stirring plate 7 and the second stirring plate 8 on the main shaft 6 rotate accordingly. The arc-shaped blades 9 push the raw materials up and down during rotation and promote the interaction between the raw materials through the through holes. At the same time, the auxiliary vibration module 5 is started, and the vibration generator 15 generates periodic vibration through the eccentric block 16 to further enhance the collision and dispersion effect between the raw materials. The protruding structure 22 on the inner wall of the mixing chamber 1 plays a turbulence role during the flow of raw materials, optimizing the mixing effect. After mixing is completed, the raw materials are discharged through the discharge port 23. The filter screen 24 intercepts the incompletely mixed particles, and the sealing cover 25 automatically closes the discharge port 23 by the spring. Operators can monitor the raw material status in real time through the observation window 26. Temperature sensor 27 and humidity sensor 28 detect environmental parameters and feed them back to the controller. The controller adjusts the working frequency of vibration generator 15 and the speed of drive motor 12 according to the parameters, thereby realizing automatic adjustment.

[0031] This invention achieves thorough mixing of raw materials in three-dimensional space through the coordinated operation of the above-mentioned components, solving the problem of uniform mixing of multiple complex raw materials in the prior art, and ensuring that the final matting film has more stable and reliable performance.

[0032] To enable those skilled in the art to fully understand and implement this utility model, the following supplementary explanation of the specific implementation principle of this utility model is provided in conjunction with a specific application scenario.

[0033] First, the various raw materials to be mixed are placed separately in the feed hopper 18 of the feeding assembly 2. The feed hopper 18 contains multiple independent partition channels formed by several inclined partition plates 19, each equipped with a flow regulating valve 20. Operators adjust the opening of the flow regulating valves 20 manually or automatically according to actual process requirements to control the flow rate of each raw material, ensuring that the raw materials enter the mixing chamber 1 in a preset proportion. After flowing out from the bottom of the feed hopper 18, the raw materials are evenly distributed across the cross-section of the mixing chamber 1 by the guide plate 21, thus preventing localized accumulation or uneven distribution of the raw materials in the initial stage.

[0034] Subsequently, the drive motor 12 in the power mechanism 4 is activated. The drive motor 12 converts high-speed rotation into low-speed, high-torque output through the reducer 13, driving the main shaft 6 and its multi-layer stirring assembly 3 to rotate. The conical guide cap 10 at the top of the main shaft 6 guides the raw materials to the central area of ​​the mixing chamber 1 during rotation, reducing the possibility of raw materials remaining at the top. The first stirring plate 7 and the second stirring plate 8 are located in the upper and lower areas of the mixing chamber 1, respectively, with arc-shaped blades 9 fixedly connected to their outer edges, rotating together with the main shaft 6. The through holes on the surface of the arc-shaped blades 9 not only propel the raw materials up and down during rotation but also promote the interaction between different raw materials, making the mixing process more efficient. Furthermore, the design of the arc-shaped blades 9 effectively reduces material adhesion, thereby improving mixing efficiency.

[0035] Simultaneously, the vibration generator 15 in the auxiliary vibration module 5 is activated, and the eccentric block 16 generates periodic vibrations during rotation. This vibration is transmitted to the internal raw materials through the sidewall of the mixing chamber 1, further enhancing the collision and dispersion effect between raw material particles. The elastic support 17 absorbs and buffers excess vibration force, preventing vibration from affecting the overall stability of the equipment. The circumferentially distributed protruding structures 22 on the inner wall of the mixing chamber 1 act as turbulence during the raw material flow. Their gradually decreasing height from top to bottom can adapt to the mixing requirements at different stages, thereby optimizing the mixing effect.

[0036] During the mixing process, the operator can monitor the state of the raw materials inside the mixing chamber 1 in real time through the observation window 26. Temperature sensor 27 and humidity sensor 28 detect environmental parameters within the mixing chamber 1 and feed the data back to the controller. The controller automatically adjusts the operating frequency of the vibration generator 15 and the rotation speed of the drive motor 12 based on the detected parameters to ensure the mixing process is always in optimal condition. For example, when an increase in temperature is detected inside the mixing chamber 1, the controller can appropriately reduce the rotation speed of the drive motor 12 to reduce heat generated by friction; when humidity is high, the controller can increase the operating frequency of the vibration generator 15 to accelerate the dispersion of raw material particles.

[0037] After mixing, the raw materials are discharged through the outlet 23. A filter screen 24 installed inside the outlet 23 intercepts incompletely mixed particles, ensuring the final discharged raw materials achieve the expected mixing uniformity. The sealing cover 25 is elastically connected to the outer wall of the mixing chamber 1 via a spring, automatically closing the outlet 23 when no external force is applied, preventing raw material leakage or the entry of external impurities. The leveling mechanisms 29 at the four corners of the base can adjust the height of the threaded rod 30 according to the ground conditions and are fixed in position by locking nuts 31, thereby ensuring that the mixing chamber 1 remains level during operation and avoiding uneven mixing caused by tilting.

[0038] Through the above steps, this invention achieves thorough mixing of raw materials in three-dimensional space, solving the problem of difficulty in uniformly mixing multiple complex raw materials in existing technologies. Specifically, the multi-layer stirring assembly 3 drives the first stirring plate 7 and the second stirring plate 8 to rotate via the main shaft 6, while the through holes on the arc-shaped blades 9 promote the vertical flow of raw materials, thereby achieving thorough mixing of raw materials in three-dimensional space; the auxiliary vibration module 5 generates periodic vibration through the rotation of the eccentric block 16, further enhancing the collision and dispersion effect between raw materials; the feeding assembly 2 achieves precise feeding of different raw materials through the separating channel and the flow regulating valve 20, avoiding the problem of low mixing efficiency caused by uneven feeding in traditional mixing devices. In addition, the design of the protruding structure 22 on the inner wall of the mixing chamber 1 and the filter screen 24 further optimizes the mixing effect, ensuring that the final matte film has more stable and reliable performance.

[0039] In summary, this invention significantly improves the uniformity and stability of raw material mixing through the synergistic cooperation of its components, providing a solid technical guarantee for the preparation of matte films.

[0040] 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 apparatus for preparing matte film, characterized in that, include: A mixing chamber (1) is set on the base to hold the raw materials; The feeding assembly (2) is fixedly installed on the top of the mixing chamber (1). The feeding assembly (2) is provided with multiple independent partition channels to realize the partitioned feeding of different raw materials. A multi-layer stirring assembly (3) is rotatably installed inside the mixing chamber (1) for agitating and mixing the raw materials. A power mechanism (4) is provided at the bottom of the mixing chamber (1) to drive the multi-layer stirring assembly (3) to rotate. An auxiliary vibration module (5) is installed on the side wall of the mixing chamber (1) to adjust the intensity of the mixing action.

2. The raw material mixing apparatus for preparing matte film as described in claim 1, characterized in that, The multi-layer stirring assembly (3) includes: A main shaft (6) is installed vertically through the mixing cavity (1) and fixed at its central axis. A first stirring plate (7) and a second stirring plate (8) are fixedly sleeved on the main shaft (6). The first stirring plate (7) is located in the upper region of the mixing chamber (1), and the second stirring plate (8) is located in the lower region of the mixing chamber (1). Multiple arc-shaped blades (9) are fixedly connected to the outer edges of the first stirring plate (7) and the second stirring plate (8), and the surface of the arc-shaped blades (9) is provided with several through holes; A conical guide cap (10) is fixedly installed at the top of the main shaft (6).

3. The raw material mixing apparatus for preparing matte film as described in claim 1, characterized in that, The power mechanism (4) includes: A motor bracket (11) is fixedly installed at the bottom of the mixing chamber (1), and a drive motor (12) is provided on the motor bracket (11). The reducer (13) is connected to the output shaft of the drive motor (12) via a coupling, and the output end of the reducer (13) is fixedly connected to the bottom end of the main shaft (6). A protective cover (14) is fixedly installed on the outside of the reducer (13).

4. The raw material mixing apparatus for preparing matte film as described in claim 1, characterized in that, The auxiliary vibration module (5) includes: A vibration generator (15) is fixedly installed on the side wall of the mixing chamber (1), and the output end of the vibration generator (15) extends into the mixing chamber (1); An eccentric block (16) is fixedly sleeved on the output end of the vibration generator (15); An elastic support (17) is provided on the side wall of the mixing cavity (1).

5. The raw material mixing apparatus for preparing matte film as described in claim 1, characterized in that, The feeding assembly (2) includes: A feed hopper (18) is fixedly installed on the top of the mixing chamber (1). The feed hopper (18) is provided with multiple inclined partition plates (19) to form multiple independent partition channels. A flow regulating valve (20) is fixedly installed on the partition plate (19); A guide plate (21) is fixedly connected to the bottom of the feed hopper (18).

6. The raw material mixing apparatus for preparing matte film as described in claim 1, characterized in that, The inner wall of the mixing cavity (1) is provided with multiple sets of protruding structures (22), which are evenly distributed along the circumference of the mixing cavity (1), and the height of each set of protruding structures (22) gradually decreases from top to bottom.

7. The raw material mixing apparatus for preparing matte film as described in claim 1, characterized in that, The bottom of the mixing chamber (1) is provided with a discharge port (23), the inner side of the discharge port (23) is provided with a filter screen (24), and the outer side of the discharge port (23) is hinged with a sealing cover (25). The sealing cover (25) is elastically connected to the outer wall of the mixing chamber (1) by a spring.

8. The raw material mixing apparatus for preparing matte film as described in claim 1, characterized in that, A temperature sensor (27) and a humidity sensor (28) are provided on the side wall of the mixing chamber (1). The temperature sensor (27) and the humidity sensor (28) are respectively connected to the controller via data lines.

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