Horizontal powder tamping and coating machine

Abstract

The application relates to a horizontal powder tamping coating machine, which comprises a machine body, a variable frequency motor mounted on the machine body as a power source and a horizontal coating cavity; a tamping cutter head is coaxially arranged in the horizontal coating cavity, the power source drives the tamping cutter head to rotate through a bearing cavity; an airflow flow sealing structure is arranged between the bearing cavity and the horizontal coating cavity, the tamping cutter head comprises a rotating shaft driven by the power source and blades arranged on the rotating shaft in an array, the blades adopt straight blade plates, the airflow flow sealing structure comprises a circulation channel, an air inlet located directly below the circulation channel and an air outlet located directly above the circulation channel, and airflow constantly flows in the circulation channel. The horizontal powder coating machine has the advantages that a vertical powder coating machine is changed into a horizontal one, reliable airflow sealing is adopted, and powder can be prevented from escaping when the rotating speed is obviously increased.

Description

Technical Field

[0001] This application relates to the field of powder coating machine technology, and in particular to a horizontal powder vibration coating machine. Background Technology

[0002] In existing technologies, powder coating equipment often employs vertical rotary machines. The core principle of a vertical rotary powder coating machine is to use the rotation of a vertical cylinder to tumble the powder, while simultaneously achieving coating through a liquid / powder spraying system. However, due to limitations in structural design and working principle, the powder's rotational speed is relatively low, typically only 10-20 m / s. This speed limitation results in low powder coating efficiency, and the process time required to coat the powder to the desired state is long. Utility Model Content

[0003] To address the shortcomings of the existing production technology, the applicant provides a horizontal powder compaction and coating machine. By utilizing the horizontal structure to increase the shaft speed, the linear velocity of the powder is increased to 20-3 m / s, thereby improving the shearing and dispersing forces of the powder during the coating process. Furthermore, it has an effective sealing structure to prevent the escape of powder when the rotation speed is significantly increased.

[0004] The technical solution adopted in this application is as follows: A horizontal powder compaction and coating machine includes a machine body, a variable frequency motor as a power source, and a horizontal coating chamber. A compaction cutter head is coaxially arranged inside the horizontal coating chamber, and the power source drives the compaction cutter head to rotate via a bearing cavity. An airflow sealing structure is provided between the bearing cavity and the horizontal coating chamber. The vibratory compaction head includes a rotating shaft driven by a power source and blades arranged in an array on the rotating shaft. The blades are straight blades. The airflow sealing structure includes a circulating flow path, an air inlet located directly below the circulating flow path, and an air outlet located directly above the circulating flow path, with a constant airflow within the circulating flow path.

[0005] As a further improvement to the above technical solution: The air pressure within the circulation path is greater than atmospheric pressure.

[0006] The recirculation path is located in the airflow circulation path, which includes an external air source, an external air pump, and an airflow duct; the recirculation path is a section of the airflow duct.

[0007] An airflow guide is provided at the air inlet of the circulation path.

[0008] The airflow guide is located at the opening of the air inlet, and the airflow guide is a vertical piece.

[0009] The airflow guide is installed on the inner diameter wall of the circulating flow path, is a vertical piece, and is directly opposite the air inlet.

[0010] The length of the airflow guide in the diameter direction of the circulation path is less than or equal to the width of the circulation path.

[0011] Each of the blades is set at an angle to the cross section of the shaft.

[0012] The frame is equipped with bearing cavity mounting supports and container mounting supports, which provide support for the bearing cavity and the horizontal covering cavity, respectively.

[0013] The horizontal coating chamber has an inert gas inlet and outlet and an exhaust valve at the bottom; the outside of the horizontal coating chamber is equipped with an insulation jacket.

[0014] The beneficial effects of this application are as follows: This application incorporates a high-pressure gas sealing ring between the material cavity and the bearing cavity, with the high-pressure gas inlet located at the bottom and the outlet at the top. This represents a systematic optimization to address the isolation requirements between the two cavities and offers the following advantages: 1. Reverse airflow blocks the path of dust penetration.

[0015] During operation of the mixing chamber, the powder tends to rise due to the stirring action. The bearing cavity contains the power source and transmission structure, requiring protection against dust intrusion. The upward airflow forms an air curtain barrier at the junction of the two cavities. The airflow direction is opposite to the natural settling direction of the dust; the dust falls downwards due to gravity, while the airflow rises. This effectively intercepts over 99% of ultrafine dust particles smaller than 5μm. When the airflow flows upwards from the sealing gap of the high-pressure sealing ring, it creates a positive pressure zone within the gap, preventing dust from the mixing chamber from entering the bearing cavity through the gap.

[0016] The air inlet is located at the bottom. Compared to the design where the air inlet of the protective gas is located at the top, the advantage of setting the air inlet at the bottom is that the air pressure gradually decreases from bottom to top, forming a pressure gradient of "high at the bottom and low at the top". This pressure gradient can ensure that the pressure holding force inside the sealing ring is stable in direction and the pressure fluctuation is small.

[0017] 2. The continuous airflow also has a heat dissipation effect, carrying away the heat generated in the bearing cavity during operation.

[0018] 3. If the air inlet is on top and the air outlet is on the bottom, the airflow is prone to sinking quickly due to gravity, which can cause a short circuit in the sealing ring, meaning that the airflow is discharged before fully covering the sealing gap. The air inlet on the bottom and the air outlet on the top can ensure the sealing effect of the high-pressure air.

[0019] 4. The air inlet is located at the bottom, making it easier to connect to external pipelines; and the type of gas introduced can be selected according to the actual working conditions. For example, in flammable and explosive powder scenarios, inert gas can be introduced to form a positive pressure inert environment in the sealed gap to ensure safety.

[0020] The use of a straight blade in this application has the following advantages: 1. The straight blade head has the advantage of synergistic effect with the material movement trajectory of horizontal equipment. The straight blade head vibrates at high frequency in the radial direction, generating transverse shear force on the accumulated powder layer and eliminating interlayer gaps. The linear vibration trajectory of the straight blade can be coordinated with the rotation of the cylinder to push the material to move evenly in the axial direction, avoiding the central stagnation zone caused by traditional agitators.

[0021] 2. In horizontal equipment, powders with large differences in particle size are prone to radial stratification due to centrifugal force, such as large particles moving outward and fine powder agglomerating in the center. The high-frequency vibration of the straight blade head disrupts the frictional balance between particles, causing powders of different particle sizes to redistribute under the action of vibration and gravity.

[0022] The container in this application has an inert gas inlet / outlet, which can achieve powder coating under inert gas protection. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the device in this application.

[0024] Figure 2 This is a schematic diagram of the internal structure of the fuselage of this application, used to illustrate the installation and transmission of the variable frequency motor.

[0025] Figure 3 This is a cross-sectional view of the horizontal covering cavity in this application.

[0026] Figure 4 This is a cross-sectional view of the airflow sealing structure of this application, showing one arrangement of the airflow guide.

[0027] Figure 5 This is a cross-sectional view of the airflow sealing structure of this application, showing another arrangement of the airflow guide.

[0028] Figure 6 This is a circulating airflow utilization loop that can be used in this application.

[0029] The components include: 1. Machine body; 2. Variable frequency motor; 3. Horizontal covering cavity; 4. Vibrating cutter head; 5. Airflow sealing structure; 6. Air source; 7. Air pump; 8. Airflow duct; 9. Bearing cavity; 101. Bearing cavity mounting support; 102. Container mounting support; 103. Inlet; 104. Outlet; 301. Inert gas inlet / outlet; 302. Exhaust valve; 303. Insulation jacket; 401. Rotary shaft; 402. Blade; 501. Circulation path; 502. Air inlet; 503. Air outlet; 504. Airflow guide. Detailed Implementation

[0030] The specific embodiments of this application are described below with reference to the accompanying drawings.

[0031] like Figures 1-6 As shown, the horizontal powder compaction and coating machine of this embodiment includes a machine body 1, on which a variable frequency motor 2 is mounted as a power source and a horizontal coating chamber 3; a compaction head 4 is coaxially arranged inside the horizontal coating chamber 3, and the power source drives the compaction head 4 to rotate via a bearing cavity; an airflow sealing structure 5 is provided between the bearing cavity and the horizontal coating chamber 3. The vibratory cutter head 4 includes a rotating shaft 401 driven by a power source and blades 402 arranged in an array on the rotating shaft 401. The blades 402 are straight blades. The airflow sealing structure 5 includes a circulating passage 501, an air inlet 502 located directly below the circulating passage 501, and an air outlet 503 located directly above the circulating passage 501. There is a constant airflow within the circulating passage 501.

[0032] The air pressure within the circulation path 501 is greater than atmospheric pressure.

[0033] The circulation path 501 is located in the airflow circulation path, which includes an external air source 6, an external air pump 7, and an airflow pipe 8; the circulation path 501 is a section of the airflow pipe 8.

[0034] An airflow guide 504 is provided at the air inlet 502 of the circulation path 501.

[0035] Airflow guide 504 is provided at the opening of air inlet 502, and airflow guide 504 is a vertical piece.

[0036] The airflow guide 504 is set on the inner diameter wall of the circulating passage 501, is a vertical piece, and is directly opposite the air inlet 502.

[0037] The length of the airflow guide 504 in the diameter direction of the circulation path 501 is less than or equal to the width of the circulation path 501.

[0038] Each blade 402 is set at an angle to the cross section of the shaft 401.

[0039] The frame is equipped with a bearing cavity mounting support 101 and a container mounting support 102, which provide support for the bearing cavity and the horizontal covering cavity 3, respectively.

[0040] The inlet of the horizontal coating chamber 3 is provided with an inert gas inlet and outlet 301, and an exhaust valve 302 is provided at the bottom; the outside of the horizontal coating chamber 3 is provided with an insulation jacket 303.

[0041] The specific structure and working principle of this application are as follows: like Figure 1 and Figure 2The diagram shown is a schematic diagram of the fuselage 1 structure in this embodiment. The fuselage 1 includes a lower compartment and a top mounting space. A variable frequency motor 2 is installed in the compartment as a power source. The variable frequency motor 2 can change its output speed to meet the speed requirements of different working conditions.

[0042] To ensure transmission efficiency and machine body stability, a bearing cavity 9 is provided between the horizontal covering cavity 3 and the variable frequency motor 2, and a bearing cavity mounting support 101 is provided on the machine body 1; the output end of the bearing cavity 9 is connected to the horizontal covering cavity 3, and a container mounting support 102 is provided on the machine body 1 to support and install the horizontal covering cavity 3. Figure 2 As shown, the variable frequency motor 2 is connected to the bearing cavity by belt drive, and the output shaft of the bearing cavity drives the rotating shaft 401 in the horizontal encasing cavity 3.

[0043] like Figure 3 As shown in the diagram, the horizontal coating chamber 3 has a powder inlet and an outlet located at its top and bottom, respectively. An inert gas inlet / outlet 301 is provided on the side wall of the horizontal coating chamber 3. An exhaust valve 302 is typically installed on the bottom wall of the horizontal coating chamber 3. These are standard configurations and will not be described in detail in this embodiment.

[0044] One of the key improvements in this embodiment is the use of straight-plate-shaped blades 402, evenly distributed on the rotating shaft 401 to form a shape like... Figure 3 The vibratory compactor head 4 is shown. Figure 3 Taking the orientation as an example, the straight blade 402 is perpendicular to the horizontal plane, but in the vertical plane, it is... Figure 3 The cutting surface is set at an angle, forming a slightly inclined state. The advantage of this inclined straight blade 402 is that it can not only use the straight plate structure to compact the powder, but also push the powder axially as the rotating shaft 401 rotates, pushing the material to move evenly along the axial direction and avoiding the central stagnation zone caused by traditional agitators.

[0045] Another improvement of this application is that Figure 4 and Figure 5 The airflow sealing structure 5 shown is in conjunction with the reference. Figure 3 The function of the airflow sealing structure 5 is to prevent dust in the horizontal encapsulation cavity 3 from leaking into the bearing cavity.

[0046] Since the bearing cavity also needs to transmit torque to the rotating shaft 401, the annular flow path 501 of the airflow sealing structure 5 is as follows: Figure 4 and Figure 5 The ring shape is shown. In order to ensure that the ring flow path 501 is filled with high-pressure airflow, in a preferred embodiment of this application, an airflow guide 504 is added to the air inlet 502, so that the airflow flows to both sides under the action of the airflow guide 504, and finally exits from the air outlet 503 at the top.

[0047] like Figure 4 As shown, the airflow guide 504 can be disposed on the inner wall of the circulating passage 501 corresponding to the air inlet 502, or as shown in the figure. Figure 5 As shown, the airflow guide 504 is positioned at the inlet of the air inlet 502. Both of these configurations are designed to prevent turbulence in the airflow at the air inlet 502, ensuring that the airflow within the circulation channel is high-speed and high-pressure, completely isolating dust.

[0048] The airflow in the circulation path 501 can be directly drawn from the outside air by the air pump 7, or an inert gas can be used; if an inert gas is used, to reduce the gas consumption, the following can be employed: Figure 6 The circulation loop shown is supplied with the air volume by air source 6, and the air pump 7 provides the airflow power. To prevent dust from mixing in, a filter can also be connected. If the air volume is lost, air source 6 can be replenished in time.

[0049] Using the coating machine of this application, the kinetic energy of the motor is transmitted to the rotating shaft 401 through the bearing cavity, which drives the vibratory cutter head 4 mounted on the rotating shaft 401 to rotate at high speed together with the powder. While the powder is rotating at high speed, under the dual action of shearing force and dispersing force, the nano-sized powder is uniformly coated on the surface of the micron-sized powder, thereby achieving the coating modification of the powder.

[0050] The above description is an explanation of this application and not a limitation of the utility model. The scope of this application is defined by the claims. Within the scope of protection of this application, any form of modification may be made.

Claims

1. A horizontal powder compaction and coating machine, characterized in that: The device includes a body (1), on which a variable frequency motor (2) is mounted as a power source, and a horizontal covering cavity (3); a vibratory compaction head (4) is coaxially arranged inside the horizontal covering cavity (3), and the power source drives the vibratory compaction head (4) to rotate via a bearing cavity (9); an airflow sealing structure (5) is provided between the bearing cavity (9) and the horizontal covering cavity (3). The vibratory compaction head (4) includes a rotating shaft (401) driven by a power source and blades (402) arranged in an array on the rotating shaft (401). The blades (402) are straight blades. The airflow sealing structure (5) includes a circulating passage (501), an air inlet (502) located directly below the circulating passage (501), and an air outlet (503) located directly above the circulating passage (501). There is a constant airflow in the circulating passage (501).

2. The horizontal powder vibration coating machine as described in claim 1, characterized in that: The air pressure in the circulation path (501) is greater than the atmospheric pressure.

3. The horizontal powder vibration coating machine as described in claim 1, characterized in that: The circulation path (501) is located in the airflow circulation path, which includes an external air source (6), an external air pump (7), and an airflow pipe (8); the circulation path (501) is a section of the airflow pipe (8).

4. The horizontal powder vibration coating machine as described in claim 1, characterized in that: An airflow guide (504) is provided at the air inlet (502) of the circulation path (501).

5. The horizontal powder compaction and coating machine as described in claim 4, characterized in that: The airflow guide (504) is located at the opening of the air inlet (502), and the airflow guide (504) is a vertical piece.

6. The horizontal powder vibration coating machine as described in claim 4, characterized in that: The airflow guide (504) is disposed on the inner diameter wall of the circulating passage (501), is a vertical piece, and is directly opposite the air inlet (502).

7. The horizontal powder compaction and coating machine as described in claim 5 or 6, characterized in that: The length of the airflow guide (504) in the diameter direction of the circulation path (501) is less than or equal to the width of the circulation path (501).

8. The horizontal powder vibration coating machine as described in claim 1, characterized in that: Each of the blades (402) is set at an angle to the cross section of the shaft (401).

9. The horizontal powder compaction and coating machine as described in claim 1, characterized in that: The body (1) is provided with a bearing cavity mounting support (101) and a container mounting support (102), which provide support for the bearing cavity and the horizontal covering cavity (3) respectively.

10. The horizontal powder vibration coating machine as described in claim 1, characterized in that: The inlet of the horizontal covering cavity (3) is provided with an inert gas inlet and outlet (301) and an exhaust valve (302) at the bottom; the outside of the horizontal covering cavity (3) is provided with a heat insulation jacket (303).

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