Extruded raw material dehydration mechanism for powder coating

Abstract

The utility model relates to the field of powder coating production, and discloses a powder coating extrusion raw material dehydration mechanism which comprises an extrusion dehydrator, a spiral conveying cylinder is fixedly installed in the middle of the extrusion dehydrator, a discharging box is arranged on one side of the spiral conveying cylinder, a collecting hopper is fixedly installed below the discharging box, and a discharging opening is formed in the middle of the bottom end of the collecting hopper. Fixed supporting rods are fixedly connected to the middle of one side of the inner wall of the collecting hopper and close to four corners, movable screen frames are movably mounted on the outer surfaces of the fixed supporting rods, screening screens are mounted in the movable screen frames, and springs sleeve the outer surfaces of the fixed supporting rods and close to the upper and lower ends of the movable screen frames; by controlling the movable screen frame to vibrate up and down, the effect of vibratory screening of the powder coating is achieved, the caked powder coating is dispersed, the dehydration efficiency of the powder coating is improved, the overall water residue of the powder coating is reduced, and the uniformity and thoroughness of dehydration of the powder coating are guaranteed.

Description

Technical Field

[0001] This application relates to the field of powder coating production, and in particular to a dehydration mechanism for extruded raw materials used in powder coatings. Background Technology

[0002] In modern industrial production, powder coatings have many advantages, such as being environmentally friendly, efficient, and having excellent film performance. The production process of powder coatings involves multiple stages, among which raw material dehydration is a crucial step. Currently, screw extrusion dehydrators are commonly used dehydration equipment in the powder coating production process. Their working principle is to use the rotation of screw blades to propel the raw material within the cylinder, applying pressure to squeeze out the water from the raw material, thereby achieving the purpose of dehydration.

[0003] In actual production, powder coatings often exhibit agglomeration after extrusion by a screw extruder. This is mainly due to the agglomeration of various components in the powder coating under pressure during the extrusion process. Combined with the inherent viscosity of the powder coating itself, this causes the powder particles to adhere together, forming clumps. The formation of these clumps not only affects the appearance quality of the powder coating but also severely impacts its dehydration effect. Clumped coatings interfere with the overall dehydration process, hindering the normal flow and dehydration of other powder particles in the screw extruder. They may clog dehydration channels, preventing water from draining smoothly and thus reducing dehydration efficiency. Furthermore, the pressure and friction experienced by clumped coatings during dehydration differ from those of normal powder particles, potentially leading to uneven dehydration. Some powder coatings may be incompletely dehydrated, while others may be over-dehydrated, affecting the consistency of the powder coating's performance.

[0004] Regarding the aforementioned technologies, the inventors believe that powder coatings have a defect of clumping after being extruded by a screw extruder. Therefore, they proposed a powder coating extrusion raw material dewatering mechanism to solve the above problems. Utility Model Content

[0005] To address the problem of agglomeration in powder coatings after extrusion by a screw extruder, this application provides a dewatering mechanism for extruded raw materials used in powder coatings.

[0006] The powder coating extrusion raw material dehydration mechanism provided in this application adopts the following technical solution:

[0007] A dewatering mechanism for extruded raw materials used in powder coatings includes an extrusion dewatering machine. A screw conveyor is fixedly installed in the middle of the extrusion dewatering machine. A discharge box is provided on one side of the screw conveyor. A collecting hopper is fixedly installed below the discharge box. A discharge port is opened in the middle of the bottom end of the collecting hopper. Fixed support rods are fixedly connected to the middle of one side of the inner wall of the collecting hopper near the four corners. A movable screen frame is movably installed on the outer surface of the fixed support rod. A filter screen is installed inside the movable screen frame. Springs are sleeved on the upper and lower ends of the outer surface of the fixed support rod near the movable screen frame. A rotating mechanism is also provided inside the collecting hopper near the lower part of the movable screen frame to control the vibration of the movable screen frame.

[0008] Preferably, the rotating mechanism includes a support shaft, which is rotatably installed at both ends of the inner wall of the extrusion dewatering machine near the lower part of the movable mesh frame. One end of the support shaft extends to the outside of the collecting hopper and is equipped with a drive motor. Cams are fixed to both sides of the outer surface of the support shaft.

[0009] Preferably, ventilation openings are symmetrically provided on both sides of the inner wall of the collection hopper near the top of the movable mesh frame, and a blower is installed inside the ventilation opening. A protective net is fixedly installed on one side of the inner wall of the collection hopper near the outside of the ventilation opening.

[0010] Preferably, the upper surface of the movable mesh frame is provided with through holes near the four corners, the outer diameter of the fixed support rod is smaller than the inner diameter of the through hole, and the fixed support rod and the through hole are interlocked.

[0011] Preferably, the overall length of the cam is greater than the distance between the movable mesh frame and the support shaft, and one side of the cam abuts against the bottom surface of the movable mesh frame.

[0012] In summary, this application includes the following beneficial technical effects:

[0013] 1. By setting up a rotating mechanism, the drive motor drives the support shaft to rotate, which in turn causes the cam to rotate. During the rotation of the cam, it continuously pushes up the movable mesh frame. Under the action of the spring, the movable mesh frame will vibrate, thereby effectively breaking up the clumps of powder coating and dispersing the clumps of powder coating, which is convenient for subsequent dehydration treatment.

[0014] 2. The powder coating can be sieved through the screen on the movable frame, making the powder particles more uniform. At the same time, the air blown by the fan can accelerate the evaporation of water in the powder coating, improve the dehydration efficiency, reduce water residue, and ensure the uniformity and thoroughness of powder coating dehydration. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the application;

[0016] Figure 2This is a schematic diagram of the fan structure in the embodiment of the application;

[0017] Figure 3 This is a cross-sectional structural diagram of the collection hopper in the embodiment of the application;

[0018] Explanation of reference numerals in the attached drawings: 1. Extrusion dewatering machine; 2. Screw conveyor; 3. Discharge box; 4. Collection hopper; 5. Discharge port; 6. Fixed support rod; 7. Movable mesh frame; 8. Screen; 9. Spring; 10. Support shaft; 11. Cam; 12. Drive motor; 13. Ventilation port; 14. Blowing fan; 15. Protective net. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0020] This application discloses a dehydration mechanism for extruded raw materials used in powder coatings. (See also...) Figure 1-3 The powder coating extrusion raw material dewatering mechanism includes an extrusion dewatering machine 1. A screw conveyor 2 is fixedly installed in the middle of the extrusion dewatering machine 1. A discharge box 3 is provided on one side of the screw conveyor 2. A collection hopper 4 is fixedly installed below the discharge box 3. A discharge port 5 is opened in the middle of the bottom end of the collection hopper 4. Fixed support rods 6 are fixedly connected to the middle of one side of the inner wall of the collection hopper 4 near the four corners. A movable screen frame 7 is movably installed on the outer surface of the fixed support rod 6. Through holes are opened on the upper surface of the movable screen frame 7 near the four corners. The outer diameter of the fixed support rod 6 is smaller than the inner diameter of the through holes. The fixed support rod 6 and the through holes are interlocked. A screen 8 is installed inside the movable screen frame 7. Springs 9 are sleeved on the upper and lower ends of the outer surface of the fixed support rod 6 near the movable screen frame 7. A rotating mechanism is also provided inside the collection hopper 4 near the lower part of the movable screen frame 7 to control the vibration of the movable screen frame 7.

[0021] The rotating spiral blades inside the spiral conveyor cylinder 2 propel the powder coating material within the cylinder, causing it to be compressed and some moisture to be squeezed out. Subsequently, the powder coating material, after initial compression and dehydration, enters the discharge box 3 from the spiral conveyor cylinder 2 and falls into the collection hopper 4 below. This causes the powder coating material to fall onto the screen 8 on the movable screen frame 7, resulting in the screen frame 7 vibrating up and down, effectively breaking up any agglomeration of the powder coating material.

[0022] Reference Figure 2 and Figure 3 The rotating mechanism includes a support shaft 10, which is rotatably installed on the inner wall of the extrusion dewatering machine 1 at both ends near the bottom of the movable mesh frame 7. One end of the support shaft 10 extends to the outside of the collection hopper 4 and is equipped with a drive motor 12. Cams 11 are fixed to both sides of the outer surface of the support shaft 10. The overall length of the cams 11 is greater than the distance between the movable mesh frame 7 and the support shaft 10. One side of the cams 11 abuts against the bottom surface of the movable mesh frame 7.

[0023] After the drive motor 12 is powered on, it starts to operate, driving the support shaft 10 to rotate. Since cams 11 are fixed to both sides of the outer surface of the support shaft 10, the cams 11 will rotate together with the support shaft 10. During the rotation, the edge of the cam 11 will continuously push up the movable mesh frame 7. When the protruding part of the cam 11 contacts the movable mesh frame 7, it will apply an upward force to the movable mesh frame 7, causing the movable mesh frame 7 to overcome the elastic force of the spring 9 and move upward along the fixed support rod 6. When the cam 11 continues to rotate and the protruding part leaves the movable mesh frame 7, the movable mesh frame 7 will move downward under the elastic restoring force of the spring 9.

[0024] Reference Figure 2 and Figure 3 Ventilation openings 13 are symmetrically provided on both sides of the inner wall of the collection hopper 4 near the top of the movable mesh frame 7. A blower 14 is installed inside the ventilation opening 13. A protective net 15 is fixedly installed on one side of the inner wall of the collection hopper 4 near the outside of the ventilation opening 13.

[0025] The blower 14 inside the ventilation openings 13 on both sides of the inner wall of the collection hopper 4 is also working. The air blown out by the blower 14 is directed through the ventilation openings 13 onto the powder coating on the movable mesh frame 7. The blowing of the air can accelerate the evaporation of moisture on the surface of the powder coating and improve the dehydration efficiency.

[0026] The implementation principle of the powder coating extrusion raw material dehydration mechanism in this application embodiment is as follows: During the powder coating production process, the raw material first enters the screw conveyor cylinder 2 of the extrusion dehydrator 1. The screw blades inside the screw conveyor cylinder 2 rotate, pushing the powder coating to move within the cylinder. During this process, the powder coating is squeezed, and some water is squeezed out. Subsequently, the powder coating that has undergone preliminary extrusion dehydration enters the discharge box 3 from the screw conveyor cylinder 2 and falls from the discharge box 3 into the collection hopper 4 below.

[0027] The collection hopper 4 is equipped with a rotating mechanism. When the drive motor 12 in the rotating mechanism is energized, it starts to run, driving the support shaft 10 to rotate. Since cams 11 are fixed to both sides of the outer surface of the support shaft 10, the cams 11 rotate along with the support shaft 10. During rotation, the edge of the cam 11 continuously pushes up the movable mesh frame 7. When the protruding part of the cam 11 contacts the movable mesh frame 7, it applies an upward force to the movable mesh frame 7, causing the movable mesh frame 7 to overcome the elastic force of the spring 9 and move upward along the fixed support rod 6. As the cam 11 continues to rotate and the protruding part leaves the movable mesh frame 7, the movable mesh frame 7 moves downward under the elastic restoring force of the spring 9.

[0028] The vibration of the movable screen frame 7 has two important functions. Firstly, vibration effectively breaks up agglomerates in the powder coating. Agglomerates formed during the extrusion and dehydration process have a relatively loose structure. Under the vibration of the movable screen frame 7, the agglomerated powder coating is subjected to impact force, causing the agglomerates to disperse into smaller particles or powder. Secondly, the screen 8 installed inside the movable screen frame 7 sieves the powder coating. Vibration causes the powder coating to continuously jump and move on the screen 8. Particles smaller than the mesh size of the screen 8 pass through and fall, while larger particles or incompletely dispersed agglomerates remain on the screen 8 and continue to be broken up by vibration until they can pass through the screen, thus making the powder coating particles more uniform.

[0029] While the movable screen frame 7 vibrates and screens the powder coating, the blower fan 14 inside the ventilation openings 13 on both sides of the inner wall of the collection hopper 4 is also working. The air blown by the blower fan 14 is directed towards the powder coating on the movable screen frame 7 through the ventilation openings 13. The blowing of the air accelerates the evaporation of moisture from the surface of the powder coating, improving the dehydration efficiency. At the same time, the airflow can also remove moisture from the area around the powder coating, allowing the powder coating to undergo dehydration in a drier environment, further reducing residual moisture and ensuring the uniformity and thoroughness of the dehydration. After dehydration, the powder coating is discharged through the discharge port 5 at the bottom center of the collection hopper 4, completing the entire dehydration process.

[0030] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0031] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0032] Finally: 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.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dewatering mechanism for extruded raw materials for powder coatings, comprising an extrusion dewatering machine (1), wherein a screw conveyor (2) is fixedly installed at the middle position of the extrusion dewatering machine (1), and a discharge box (3) is provided on one side of the screw conveyor (2), characterized in that: A collection hopper (4) is fixedly installed below the discharge box (3). A discharge port (5) is opened in the middle of the bottom end of the collection hopper (4). Fixed support rods (6) are fixedly connected to the middle of one side of the inner wall of the collection hopper (4) near the four corners. A movable mesh frame (7) is movably installed on the outer surface of the fixed support rod (6). A screen (8) is installed inside the movable mesh frame (7). Springs (9) are sleeved on the upper and lower ends of the outer surface of the fixed support rod (6) near the movable mesh frame (7). A rotating mechanism is also provided inside the collection hopper (4) near the lower part of the movable mesh frame (7) to control the vibration of the movable mesh frame (7).

2. The powder coating extrusion raw material dehydration mechanism according to claim 1, characterized in that: The rotating mechanism includes a support shaft (10), which is rotatably installed on the inner wall of the extrusion dewatering machine (1) at both ends near the lower part of the movable mesh frame (7). One end of the support shaft (10) extends to the outside of the collection hopper (4) and is equipped with a drive motor (12). Cams (11) are fixed to both sides of the outer surface of the support shaft (10).

3. The dehydration mechanism for extruded raw materials for powder coatings according to claim 1, characterized in that: Ventilation openings (13) are symmetrically provided on both sides of the inner wall of the collection hopper (4) near the top of the movable mesh frame (7). A blower (14) is installed inside the ventilation opening (13). A protective net (15) is fixedly installed on one side of the inner wall of the collection hopper (4) near the outside of the ventilation opening (13).

4. The dehydration mechanism for extruded raw materials for powder coatings according to claim 1, characterized in that: The upper surface of the movable mesh frame (7) is provided with through holes near the four corners. The outer diameter of the fixed support rod (6) is smaller than the inner diameter of the through hole. The fixed support rod (6) and the through hole are interlocked.

5. The dehydration mechanism for extruded raw materials for powder coatings according to claim 2, characterized in that: The overall length of the cam (11) is greater than the distance between the movable mesh frame (7) and the support shaft (10), and one side of the cam (11) abuts against the bottom surface of the movable mesh frame (7).

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