Powder coating premixing machine

Abstract

The utility model relates to the technical field of premixers, and discloses a powder coating premixer which comprises a premixing cylinder, the bottom of the premixing cylinder is communicated with a discharge port, a stirring driving mechanism is arranged in the premixing cylinder, the upper end of the stirring driving mechanism extends to the top of the premixing cylinder and is connected with a driving motor, and the lower end of the stirring driving mechanism extends to the top of the premixing cylinder. The lower end of the stirring driving mechanism extends to the lower end of the inner cavity of the premixing barrel and is close to the top of the discharge hole; and the stirring driving mechanism comprises a driving assembly which is movably sleeved in the premixing barrel. Due to the arrangement of the driving assembly, mixed powder in the premixing barrel can be stirred under the matching of the stirring assembly, so that premixing is completed; and under the cooperation of the driving assembly and the stirring assembly, a dredging rod at the bottom of the stirring assembly can be inserted into the discharging opening, so that the mixed powder falling into the discharging opening is stirred, and the situation of blockage caused by dense vibration is effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of premixing technology, and more specifically, to a powder coating premixing machine. Background Technology

[0002] Powder coating is a type of solid coating composed of solid raw materials such as film-forming resin, additives, and pigments and fillers. It is produced through four processes: premixing, extrusion, tableting, and pulverization. It produces no wastewater, waste gas, or waste residue and poses no harm to human health, air, water, or soil.

[0003] Existing powder coating premixing devices have a discharge port at the bottom. However, the discharge port structure of existing premixing devices is simple, and some of the mixture tends to enter the discharge port prematurely during mixing. The stirring mechanism is unable to effectively act on the discharge port. This shaking during prolonged mixing causes the mixture entering the discharge port to become compacted. As a result, the pre-compacted mixture in the discharge port can cause blockage during discharge, affecting the discharge process. Therefore, it is necessary to develop a new type of coating premixing machine to address the shortcomings of existing technologies. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a powder coating premixer.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a powder coating premixer, comprising a premixing cylinder, the bottom of which is connected to a discharge port, and a stirring drive mechanism is provided inside the premixing cylinder, the upper end of which extends to the top of the premixing cylinder and is connected to a drive motor, and the lower end of which extends to the lower end of the inner cavity of the premixing cylinder and is close to the top of the discharge port.

[0006] The stirring drive mechanism includes a drive assembly movably fitted inside the premixing cylinder. A stirring assembly disposed inside the premixing cylinder is slidably connected to the outside of the drive assembly. A plurality of cleaning brushes are evenly distributed on the outer surface of the stirring assembly near the inner wall of the premixing cylinder. A drain rod is fixedly connected to the lower end of the cleaning brush. A positioning ball is movably embedded in the outer surface of the drain rod. The positioning ball is rotatably connected to the inside of the discharge port.

[0007] As a preferred embodiment of this utility model, a feeding hopper is fixedly installed on the top of the premixing cylinder, the lower end of the feeding hopper is connected to the interior of the premixing cylinder, and a support frame is fixedly connected to the bottom of the premixing cylinder.

[0008] As a preferred embodiment of the present invention, the drive assembly includes a transmission rod that is rotatably sleeved inside the premixing cylinder via a bearing. The top of the transmission rod extends above the premixing cylinder and is connected to the bottom of the output shaft of the drive motor.

[0009] As a preferred technical solution of this utility model, the upper and lower ends of the outer surface of the transmission rod are provided with a plurality of evenly distributed guide grooves, and the length of the guide groove along the axial direction of the transmission rod is the same as the axial length of the discharge port.

[0010] As a preferred technical solution of this utility model, the stirring assembly includes a plurality of stirring racks disposed inside the premixing cylinder and evenly distributed therein, and a plurality of cleaning brushes corresponding one to one with the stirring racks, wherein the cleaning brushes are fixedly connected to the side of the stirring racks near the inner wall of the premixing cylinder.

[0011] As a preferred technical solution of this utility model, the transmission rod is provided with two upper and lower limiting sleeves on its outer side. A number of uniformly distributed drag-reducing balls are movably embedded in the inner side of the limiting sleeves. The limiting sleeves are linked with the guide groove through the drag-reducing balls. The two limiting sleeves are respectively fixedly connected to the upper and lower ends of the opposing surfaces of a number of stirring racks.

[0012] As a preferred technical solution of this utility model, a positioning ring located below the limiting sleeve is fixedly sleeved at both the upper and lower ends of the outer surface of the transmission rod. A return spring located between the corresponding positioning ring and the limiting sleeve is also provided on the outside of the transmission rod. The two ends of the return spring abut against the opposing surfaces of the limiting sleeve and the positioning ring, respectively.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. Due to the setting of the drive component, the mixed powder inside the premixing cylinder can be stirred in cooperation with the stirring component to complete the premixing; and with the cooperation of the drive component and the stirring component, the unblocking rod at the bottom of the stirring component can be inserted into the discharge port, thereby stirring the mixed powder falling into the discharge port, thus effectively avoiding the situation of blockage caused by vibration compaction.

[0015] 2. Due to the setting of the positioning ball, when the unblocking rod drives the positioning ball to move downward along the outside of the driving component with the stirring component, it can play a good limiting effect on the lower end of the stirring driving mechanism with the cooperation of the positioning ball and the discharge port, thereby improving the stability of the stirring driving mechanism when it rotates rapidly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a front view of the present invention;

[0018] Figure 3 This is a sectional view of the front of the present invention;

[0019] Figure 4 This is a schematic diagram of the stirring drive mechanism of this utility model.

[0020] In the diagram: 1. Premixing cylinder; 2. Discharge port; 3. Stirring drive mechanism; 31. Drive assembly; 311. Transmission rod; 312. Guide chute; 32. Stirring assembly; 321. Stirring frame; 322. Limiting sleeve; 323. Positioning ring; 324. Return spring; 33. Cleaning brush; 34. Unclogging rod; 35. Positioning ball; 4. Feeding hopper; 5. Support frame. Detailed Implementation

[0021] 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.

[0022] like Figures 1 to 4 As shown, this utility model provides a powder coating premixer, including a premixing cylinder 1, with a discharge port 2 connected to the bottom of the premixing cylinder 1, and a stirring drive mechanism 3 installed inside the premixing cylinder 1. The upper end of the stirring drive mechanism 3 extends to the top of the premixing cylinder 1 and is connected to a drive motor, and the lower end of the stirring drive mechanism 3 extends to the lower end of the inner cavity of the premixing cylinder 1 and is close to the top of the discharge port 2.

[0023] The stirring drive mechanism 3 includes a drive assembly 31 movably fitted inside the premixing cylinder 1. A stirring assembly 32, also located inside the premixing cylinder 1, is slidably connected to the outside of the drive assembly 31. A plurality of evenly distributed cleaning brushes 33 are connected to the outer surface of the stirring assembly 32 near the inner wall of the premixing cylinder 1. A drain rod 34 is fixedly connected to the lower end of each cleaning brush 33. Positioning balls 35 are movably embedded in the outer surface of the drain rod 34 and are rotatably connected to the inside of the discharge port 2. Due to the drive assembly 31, the mixed powder inside the premixing cylinder 1 can be stirred in cooperation with the stirring assembly 32 to complete the mixing process. Premixing; and with the cooperation of the drive component 31 and the stirring component 32, the unclogging rod 34 at the bottom of the stirring component 32 can be inserted into the discharge port 2, thereby stirring the mixed powder falling into the discharge port 2, thus effectively avoiding the situation of blockage caused by vibration compaction; furthermore, due to the setting of the positioning ball 35, when the unclogging rod 34 drives the positioning ball 35 to move downward along the outside of the drive component 31 with the stirring component 32, it can play a good limiting effect on the lower end of the stirring drive mechanism 3 with the cooperation of the positioning ball 35 and the discharge port 2, thereby improving the stability of the stirring drive mechanism 3 when rotating rapidly.

[0024] The premixing cylinder 1 is fixedly equipped with a feeding hopper 4 at its top, and the lower end of the feeding hopper 4 is connected to the interior of the premixing cylinder 1. The bottom of the premixing cylinder 1 is fixedly connected with a support frame 5.

[0025] The drive assembly 31 includes a transmission rod 311 that is rotatably sleeved inside the premixing cylinder 1 via a bearing. The top of the transmission rod 311 extends above the premixing cylinder 1 and is connected to the bottom of the output shaft of the drive motor.

[0026] The transmission rod 311 has several evenly distributed guide grooves 312 on both the upper and lower ends of its outer surface. The length of the guide grooves 312 along the axial direction of the transmission rod 311 is the same as the axial length of the discharge port 2. Due to the setting of the guide grooves 312, when the transmission rod 311 rotates rapidly with the drive motor, the mixing component 32 is blocked by the mixture in the premixing cylinder 1, causing the transmission rod 311 and the mixing component 32 to rotate relative to each other. With the cooperation of the guide grooves 312, the mixing component 32 moves downward along the outside of the drive component 31, thereby allowing the unblocking rod 34 to be inserted into the interior of the discharge port 2.

[0027] The mixing assembly 32 includes several mixing racks 321 that are evenly distributed inside the premixing cylinder 1, and several cleaning brushes 33 that correspond one-to-one with the mixing racks 321. The cleaning brushes 33 are fixedly connected to the side of the mixing rack 321 near the inner wall of the premixing cylinder 1. Due to the arrangement of the mixing racks 321, the driving mechanism can drive the several mixing racks 321 to rotate rapidly under the cooperation of the driving assembly 31 and the limiting sliding sleeve 322, thereby stirring and premixing the mixed powder in the premixing cylinder 1.

[0028] The transmission rod 311 is fitted with two upper and lower limiting sleeves 322. The inner side of the limiting sleeves 322 is movably embedded with a number of evenly distributed drag-reducing balls. The limiting sleeves 322 are linked with the guide groove 312 through the drag-reducing balls. The two limiting sleeves 322 are respectively fixedly connected to the upper and lower ends of the opposing surfaces of the several stirring frames 321. Due to the setting of the drag-reducing balls, the limiting sleeves 322 and the transmission rod 311 rotate relative to each other under the cooperation of the guide groove 312. Under the cooperation of the two, the limiting sleeves 322 can slide up and down along the outside of the transmission rod 311, thereby realizing the effect of inserting the unblocking rod 34 into the discharge port 2.

[0029] The transmission rod 311 has a positioning ring 323 fixedly sleeved at both the upper and lower ends of its outer surface, which is located below the limiting sleeve 322. The transmission rod 311 also has a return spring 324 located between the corresponding positioning ring 323 and the limiting sleeve 322. The two ends of the return spring 324 abut against the opposing surfaces of the limiting sleeve 322 and the positioning ring 323, respectively. Due to the setting of the return spring 324, it can be ensured that when the drive assembly 31 and the stirring frame 321 rotate relative to each other, the return spring 324 can slide relative to each other and compress the return spring 324. At the same time, after the rotation and stirring stop, the stirring assembly 32 can be moved upward in the opposite direction under the elastic restoring force of the return spring 324, so that the unblocking rod 34 can be disengaged from the discharge port 2 for material discharge from the discharge port 2.

[0030] Principles and usage process:

[0031] As shown in the figure, assemble the equipment and add the mixed powder through the feeding hopper 4. Then turn on the drive motor to make the transmission rod 311 rotate quickly. Under the resistance of the mixed powder, the transmission rod 311 and the limiting sleeve 322 rotate relative to each other. Then, with the cooperation of the guide groove 312 and the resistance-reducing ball, the stirring assembly 32 slides down along the outside of the transmission rod 311 and compresses the return spring 324. At the same time, it pushes the unblocking rod 34 at the lower end to insert into the inside of the discharge port 2, and makes the positioning ball 35 on the outside of the unblocking rod 34 roll on the inner wall of the discharge port 2. At this time, due to the following movement of the unblocking rod 34, the mixed powder in the discharge port 2 can be stirred.

[0032] When the premixing is completed and the drive motor is turned off, the drive assembly 31 and the stirring assembly 32 will stop rotating. At this time, under the elastic restoring force of the return spring 324, the stirring frame 321 will be pushed upward, thereby causing the unblocking rod 34 to disengage from the discharge port 2, so that the material can be discharged through the discharge port 2.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A powder coating premixer, comprising a premixing cylinder (1), characterized in that: The bottom of the premixing cylinder (1) is connected to the discharge port (2). The interior of the premixing cylinder (1) is provided with a stirring drive mechanism (3). The upper end of the stirring drive mechanism (3) extends to the top of the premixing cylinder (1) and is connected to a drive motor. The lower end of the stirring drive mechanism (3) extends to the lower end of the inner cavity of the premixing cylinder (1) and is close to the top of the discharge port (2). The stirring drive mechanism (3) includes a drive assembly (31) that is movably sleeved inside the premixing cylinder (1). The drive assembly (31) is slidably connected to a stirring assembly (32) that is disposed inside the premixing cylinder (1). A plurality of cleaning brushes (33) are evenly distributed on the side of the outer surface of the stirring assembly (32) near the inner wall of the premixing cylinder (1). A draining rod (34) is fixedly connected to the lower end of the cleaning brush (33). A positioning ball (35) is movably embedded in the outer surface of the draining rod (34). The positioning ball (35) is rotatably connected to the inside of the discharge port (2).

2. The powder coating premixer according to claim 1, characterized in that: The top of the premixing cylinder (1) is fixedly equipped with a feeding hopper (4), the lower end of the feeding hopper (4) is connected to the interior of the premixing cylinder (1), and the bottom of the premixing cylinder (1) is fixedly connected with a support frame (5).

3. The powder coating premixer according to claim 1, characterized in that: The drive assembly (31) includes a transmission rod (311) that is rotatably sleeved inside the premixing cylinder (1) via a bearing. The top of the transmission rod (311) extends above the premixing cylinder (1) and is connected to the bottom of the output shaft of the drive motor.

4. A powder coating premixer according to claim 3, characterized in that: The upper and lower ends of the outer surface of the transmission rod (311) are provided with a number of evenly distributed guide grooves (312). The length of the guide grooves (312) along the axial direction of the transmission rod (311) is the same as the axial length of the discharge port (2).

5. A powder coating premixer according to claim 1, characterized in that: The stirring assembly (32) includes a plurality of stirring racks (321) disposed inside the premixing cylinder (1) and evenly distributed therein, and a plurality of cleaning brushes (33) corresponding one to one with the stirring racks (321). The cleaning brushes (33) are fixedly connected to the side of the stirring rack (321) near the inner wall of the premixing cylinder (1).

6. A powder coating premixer according to claim 3, characterized in that: The transmission rod (311) is fitted with two upper and lower limiting sleeves (322). The inner side of the limiting sleeve (322) is movably embedded with a number of uniformly distributed drag-reducing balls. The limiting sleeve (322) is linked with the guide groove (312) through the drag-reducing balls. The two limiting sleeves (322) are respectively fixedly connected to the upper and lower ends of the opposing surfaces of a number of stirring racks (321).

7. A powder coating premixer according to claim 6, characterized in that: A positioning ring (323) located below the limiting sleeve (322) is fixedly sleeved at both the upper and lower ends of the outer surface of the transmission rod (311). A return spring (324) is also provided on the outside of the transmission rod (311) between the corresponding positioning ring (323) and the limiting sleeve (322). The two ends of the return spring (324) abut against the opposing surfaces of the limiting sleeve (322) and the positioning ring (323).

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