Molding powder stirrer

Abstract

The utility model discloses a molding powder stirrer which comprises a stirring tank and a stirring paddle driven by a first motor, and the stirring paddle is in contact with the bottom surface and the side wall of the stirring tank; the stirring tank is communicated with a material guide assembly in an area swept by the stirring paddle, and the material guide assembly is communicated with the stirring tank and the blanking pipeline; the material guide assembly comprises a connecting pipe arranged at the bottom of the stirring tank, a spherical buffer tank and a spiral material guide rod, and the spiral material guide rod is driven by a second motor to rotate; the spiral material guide rod and the connecting pipe are coaxially arranged, and the spiral material guide rod extends into the connecting pipe; a discharge hole is formed in the lower part of the spherical buffer tank; the mobility of powder raw materials at the connecting position of equipment and a pipeline is improved through the material guiding assembly, the stability of material conveying is guaranteed, and the production takt time can be kept easily.

Description

Technical Field

[0001] This utility model relates to the technical field of powder coating production equipment, and in particular to a plastic powder mixer. Background Technology

[0002] Powder coatings are widely used for coating metal, plastic, and wood surfaces, offering excellent corrosion resistance, wear resistance, and weather resistance. The main raw materials for powder coatings include resins, pigments, and curing agents. The process involves mixing these raw materials in a specific ratio using mixing equipment; extruding the raw materials in an extruder; grinding them into powder form; and mixing them using a high-speed mixer.

[0003] To improve the automation of production, pipes are often used to connect the materials during the mixing process and the mixture is transferred to the extruder by gravity through the upper and lower settings. However, since the flowability of powder particles is different from that of flowing liquids, the tortuous pipes are not conducive to the flow of powder coatings, which can easily cause material blockage and affect the production cycle.

[0004] Utility model patent CN219804583U discloses a mixing tank for low-boiling-point coatings. This design not only improves the mixing effect and allows for control over the mixing time of the coating within the tank, preventing clumping and adhesion to the inner wall, thus avoiding waste, but also makes the tank more convenient to use. When mixing different types of coatings, separate cleaning of the agitator and mixing components is unnecessary, ensuring the quality of the coating during use. Summary of the Invention

[0005] The purpose of this invention is to provide a plastic powder mixer. This invention utilizes a material guiding component to improve the flowability of powder raw materials at the connection points between the equipment and pipelines, ensuring the stability of material transfer and facilitating the maintenance of production rhythm.

[0006] To solve this technical problem, the technical solution of this utility model is: a plastic powder mixer, including a mixing tank and a mixing blade driven by a first motor, wherein the mixing blade is in contact with the bottom surface and side wall of the mixing tank;

[0007] A material guiding component is connected to the mixing tank in the area swept by the mixing blade, and the material guiding component connects the mixing tank and the discharge pipe;

[0008] The material guiding assembly includes a connecting pipe located at the bottom of the mixing tank, a spherical buffer tank, and a spiral guide rod. The spiral guide rod is driven to rotate by a second motor. The spiral guide rod is coaxially arranged with the connecting pipe and extends into the spiral guide rod. A discharge port is provided at the bottom of the spherical buffer tank.

[0009] In a further improvement, the mixing tank is supported by a fixed plate, with the mixing tank and the first motor located on opposite sides of the fixed plate. This invention utilizes the fixed plate to effectively stabilize the installation of the mixing tank, making it suitable for vertical distribution with the extruder, and utilizing the material's own weight to achieve material transfer.

[0010] In a further improvement, the stirring paddle has three or more blades, each blade being inclined from top to bottom along the direction of rotation, and the blades contacting the bottom surface of the mixing tank. In this invention, the stirring paddle has multiple blades inclined from bottom to top, which, through rotation, enable the material to move vertically, facilitating the uniform mixing of resins, pigments, curing agents, etc.

[0011] In a further improvement, the spiral guide rod is surrounded by a connecting pipe and a spherical buffer tank. The connecting pipe is horizontally inclined downwards and connects to the buffer tank, with the outlet of the buffer tank located at its bottom. This invention utilizes a spiral guide rod driven by a second motor to move the powdered material in the mixing tank into the connecting pipe under the action of the stirring paddle and centrifugal force. Then, the rotation of the spiral guide rod actively feeds the material into the connecting pipe. The spiral guide rod then actively guides the powdered material in the connecting pipe and the mixing tank into the buffer tank, where it flows smoothly to the extruder under gravity.

[0012] In a further improvement, the connection point between the buffer tank and the connecting pipe is positioned above the outlet of the buffer tank. This invention further utilizes the difference in height between the connecting pipe and the buffer tank at the inlet and outlet to achieve a change in the direction of material discharge from the mixing tank from vertical.

[0013] In a further improvement, the inner diameter of the buffer tank is D1, and the inner diameter of the connecting pipe is D2, wherein the relationship between D1 and D2 is (3 to 5):1. In this invention, it is necessary to ensure that the inner diameter of the buffer tank is significantly larger than the inner diameter of the connecting pipe. This facilitates the installation of the spiral guide rod and also allows the material to fall naturally into the buffer tank under the influence of the spiral guide rod, freed from the confinement of the connecting pipe. Furthermore, the inner diameter of the buffer tank's outlet is also significantly larger than the inner diameter of the connecting pipe, ensuring smooth material flow.

[0014] In a further improvement, the mixing tank is equipped with a sealing cover. This invention reduces dust generation caused by the mixing paddle during material mixing by providing a sealing cover.

[0015] By adopting the above technical solution, the beneficial effects of this utility model are:

[0016] This invention utilizes a material guiding component connected to the area swept by the mixing paddle within the mixing tank. As the mixing paddle stirs and rotates, the material guiding component includes a connecting pipe located at the bottom of the mixing tank, a spherical buffer tank, and a spiral guide rod. The spiral guide rod is driven to rotate by a second motor. As the mixing paddle rotates, various uniformly mixed raw materials continuously enter the connecting pipe. Driven by the second motor, the spiral guide rod guides the material from the connecting pipe into the buffer tank. Due to its own gravity and the inner wall of the buffer tank, the material is concentrated at the outlet below the spherical buffer tank and enters the extruder through a pipe. The material achieves a change from a horizontal to a vertical direction. This invention utilizes the material guiding component to improve the flowability of powdered raw materials at the connection point between the equipment and the pipeline, ensuring the stability of material transfer and facilitating the maintenance of production cycle. Attached Figure Description

[0017] Figure 1 This is a perspective view of a plastic powder mixer according to this utility model;

[0018] Figure 2 This is the front view of this utility model;

[0019] Figure 3 This is a top view of the present invention;

[0020] Figure 4 This is a cross-sectional view (AA) of this utility model;

[0021] Figure 5 This is a perspective view of the hidden cover of this utility model.

[0022] In the picture:

[0023] 1. Mixing tank; 2. First motor; 3. Mixing paddle; 31. Blade; 4. Material guiding assembly; 41. Connecting pipe; 42. Buffer tank; 421. Discharge port; 43. Spiral guide rod; 44. Second motor; 5. Fixing plate; 6. Sealing cover. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] This embodiment discloses a plastic powder mixer, such as... Figures 1 to 5As shown, the system includes a mixing tank 1 and a stirring paddle 3 driven by a first motor 2. The stirring paddle 3 contacts the bottom and side walls of the inner wall of the mixing tank 1. A material guiding assembly 4 is connected to the area swept by the stirring paddle 3 in the mixing tank 1. The material guiding assembly 4 connects the mixing tank 1 and the discharge pipe. The material guiding assembly 4 includes a connecting pipe 41 set at the bottom of the mixing tank 1, a spherical buffer tank 42, and a spiral guide rod 43. The spiral guide rod 43 is driven to rotate by a second motor 44. The spiral guide rod 43 is coaxially arranged with the connecting pipe 41 and extends into the spiral guide rod 43. A discharge port 421 is provided below the spherical buffer tank 42.

[0026] In this embodiment, the mixing tank 1 is supported by a fixed plate 5, and the mixing tank 1 and the first motor 2 are located on opposite sides of the fixed plate 5. This embodiment utilizes the fixed plate 5 to effectively stabilize the installation of the mixing tank 1, making it suitable for vertical distribution with the extruder, and utilizing the weight of the material itself to achieve material transfer.

[0027] In this embodiment, the stirring paddle 3 has three or more blades 31, and each blade 31 is inclined from top to bottom along the direction of rotation, and the blade 31 is in contact with the bottom surface of the mixing tank 1. In this embodiment, the stirring paddle 3 has multiple blades 31 that are inclined from bottom to top, and the material is moved vertically by rotation, which is beneficial for the uniform mixing of resin, pigment, curing agent, etc.

[0028] In this embodiment, the spiral guide rod 43 is surrounded by a connecting pipe 41 and a spherical buffer tank 42. The connecting pipe 41 is horizontally inclined downwards and connects to the buffer tank 42. The outlet 421 of the buffer tank 42 is located at the bottom of the buffer tank 42. In this embodiment, the spiral guide rod driven by the second motor 44 moves the powdered material in the mixing tank 1 into the connecting pipe 41 under the action of the stirring paddle 3 and centrifugal force. Then, under the rotation of the spiral guide rod 43, the material is actively fed into the connecting pipe 41. Through the action of the spiral guide rod 43, the powdered material in the connecting pipe 41 and the mixing tank 1 is actively guided into the buffer tank 42. Under the action of gravity, the material flows smoothly to the extruder.

[0029] In this embodiment, the connection between the buffer tank 42 and the connecting pipe 41 is located above the discharge port 421 of the buffer tank 42. Furthermore, this embodiment utilizes the difference in vertical height between the connecting pipe 41 and the buffer tank 42 during feeding and discharging to achieve a change in the direction of material discharge from the mixing tank 1 from the vertical.

[0030] In this embodiment, the inner diameter of the buffer tank 42 is D1, and the inner diameter of the connecting pipe 41 is D2, wherein the relationship between D1 and D2 is (3 to 5):1. In this embodiment, it is necessary to ensure that the inner diameter of the buffer tank 42 is significantly larger than the inner diameter of the connecting pipe 41. This is to facilitate the installation of the spiral guide rod 43, and also to allow the material to fall naturally into the buffer tank 42 under the action of the spiral guide rod 43, without being surrounded by the connecting pipe 41. Furthermore, the inner diameter of the outlet 421 of the buffer tank 42 is also significantly larger than the inner diameter of the connecting pipe 41, ensuring smooth material passage.

[0031] In this embodiment, the mixing tank 1 is equipped with a sealing cover 6. This embodiment reduces dust generated during the mixing process of materials by setting the sealing cover 6.

[0032] The specific working process of this embodiment is as follows:

[0033] In this embodiment, a material guiding component 4 is connected to the area swept by the stirring paddle 3 in the mixing tank 1. As the stirring paddle 3 stirs and rotates, the material guiding component 4 includes a connecting pipe 41 set at the bottom of the mixing tank 1, a spherical buffer tank 42, and a spiral guide rod 43. The spiral guide rod 43 is driven to rotate by a second motor 44. As the stirring paddle 3 rotates, various raw materials that are uniformly stirred continuously enter the connecting pipe 41. Driven by the second motor 44, the spiral guide rod 43 guides the material in the connecting pipe 41 to the buffer tank 42. Due to its own gravity and the inner wall of the buffer tank 42, the material is concentrated at the outlet 421 below the spherical buffer tank 42 and enters the extruder through a pipe. The material achieves a change from the horizontal direction to the vertical direction. In this embodiment, the material guiding component 4 improves the flowability of powder raw materials at the connection point between the equipment and the pipe, ensures the stability of material transfer, and helps maintain the production cycle.

Claims

1. A plastic powder mixer, characterized in that: It includes a mixing tank and an agitator driven by a first motor, the agitator contacting the bottom surface and side walls of the mixing tank; A material guiding component is connected to the mixing tank in the area swept by the mixing blade, and the material guiding component connects the mixing tank and the discharge pipe; The material guiding assembly includes a connecting pipe located at the bottom of the mixing tank, a spherical buffer tank, and a spiral guide rod. The spiral guide rod is driven to rotate by a second motor. The spiral guide rod is coaxially arranged with the connecting pipe and extends into the spiral guide rod. A discharge port is provided at the bottom of the spherical buffer tank.

2. The plastic powder mixer as described in claim 1, characterized in that: The mixing tank is supported on a fixed plate, and the mixing tank and the first motor are located on opposite sides of the fixed plate.

3. The plastic powder mixer as described in claim 1, characterized in that: The stirring paddle has three or more blades, and each blade is inclined from top to bottom along the direction of rotation, and the blades are in contact with the bottom surface of the mixing tank.

4. The plastic powder mixer as described in claim 1, characterized in that: The spiral guide rod is surrounded by a connecting pipe and a spherical buffer tank, wherein the connecting pipe is horizontally inclined downwards and connects to the buffer tank, and the outlet of the buffer tank is located at the bottom of the buffer tank.

5. A plastic powder mixer as described in claim 4, characterized in that: The connection point between the buffer tank and the connecting pipe is located above the outlet of the buffer tank.

6. A plastic powder mixer as described in claim 4, characterized in that: The inner diameter of the buffer tank is D1, and the inner diameter of the connecting pipe is D2, wherein the relationship between D1 and D2 is D1:D2 = (3 to 5):

1.

7. A plastic powder mixer as described in claim 1, characterized in that: The mixing tank is equipped with a sealing cover.

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