Proportioning device for producing waterborne polyurethane paint

Abstract

The utility model discloses a proportioning device for producing waterborne polyurethane paint, which comprises a shell, a working table is arranged in the shell, the middle part of the working table is rotatably connected with a stirring barrel, the upper end and the lower end of the front side wall of the shell are hinged with material doors through hinges, and the proportioning device further comprises an adjustable stirring mechanism; the adjustable stirring mechanism comprises a mounting barrel, bosses, scrapers, avoiding grooves and stirring rollers, a mounting disc for mounting components is arranged in the middle of the upper side wall of the stirring barrel, a mounting barrel is arranged on the lower side face of the mounting disc, the bosses are arranged on the lower sides of the left end and the right end of the inner cambered surface of the mounting barrel, and the scrapers are rotationally connected to the front side faces of the bosses. The left side and the right side of the lower end of the mounting cylinder are each provided with an avoiding groove corresponding to the two scraping plates one to one, the lower side face of the mounting cylinder is provided with evenly-distributed stirring rollers, according to the proportioning device for waterborne polyurethane paint production, whether the scraping plates scrape inner wall materials or not is flexibly adjusted, the stirring process is more controllable, and equipment abrasion is reduced.

Description

Technical Field

[0001] This utility model relates to the field of waterborne polyurethane paint production technology, specifically a mixing device for waterborne polyurethane paint production. Background Technology

[0002] Waterborne polyurethane paint is a type of coating that consists of waterborne hydroxyl resin and additives as one component, and a curing agent as the other component, packaged and supplied in a specified ratio. Waterborne polyurethane paint uses water as a diluent, has a low VOC (volatile organic compound) content, is non-toxic and odorless, and has minimal environmental pollution. It poses less harm to human health and the environment during and after use. Typically, the ratio of the main paint to the curing agent in waterborne polyurethane paint is between 4:1 and 5:1. For example, some products may use 4 parts main paint to 1 part curing agent. When using, the ratio specified in the product instructions should be strictly followed to ensure the performance of the paint film.

[0003] In the prior art, patent CN 211506433 U discloses a mass proportioning device for the production of water-based polyurethane paint, including a support base, a stirring cylinder at the top of the support base, a proportioning chamber at the top of the stirring cylinder, two sets of weighing mechanisms extending into the proportioning chamber at the top of the proportioning chamber, and spring-loaded beads connected to the proportioning chamber on the outer wall of the weighing mechanisms. Inside the proportioning chamber, below the weighing mechanisms, two sets of feeding frames extending into the stirring cylinder are arranged, an electric telescopic rod is installed between the two sets of feeding frames, and a lifting plate connected to the weighing mechanism is provided at the output end of the electric telescopic rod. A motor is provided at the bottom of the support base, and a rotating column is provided at the output end of the motor extending into the support base. A stirring column extending into the support base is arranged inside the stirring cylinder, and multiple sets of stirring rods are arranged on the outer wall of the stirring column inside the stirring cylinder. A scraper is arranged above the stirring rods on the outer wall of the stirring column, and the outer wall of the scraper is in close contact with the inner wall of the stirring cylinder.

[0004] There are some problems. In the above scheme, the scraper is fixed on the stirring shaft and is always in close contact with the inner wall of the mixing tank. This means that the scraper cannot be adjusted, which greatly reduces the controllability of the stirring operation. Moreover, if the material to be stirred does not easily adhere to the tank wall or the requirement for mixing uniformity is not high, the scraper is still in close contact with the inner wall of the mixing tank, which increases the wear between the scraper and the inner wall of the mixing tank. Therefore, we propose a proportioning device for the production of water-based polyurethane paint. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a mixing device for the production of water-based polyurethane paint. The device allows for flexible adjustment of whether the scraper removes material from the inner wall, making the mixing process more controllable and reducing equipment wear. This can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a mixing device for the production of water-based polyurethane paint, comprising a shell, a workbench inside the shell, a mixing tank rotatably connected to the middle of the workbench, material doors hinged to the upper and lower ends of the front sidewall of the shell, and an adjustable mixing mechanism.

[0007] Adjustable stirring mechanism: It includes a mounting cylinder, bosses, scrapers, clearance grooves, and stirring rollers. The upper side wall of the stirring tank is provided with a mounting plate for mounting components. The lower side of the mounting plate is provided with a mounting cylinder. The lower sides of the inner arc surface of the mounting cylinder are provided with bosses. The front side of each boss is rotatably connected to a scraper. The lower left and right sides of the mounting cylinder are provided with clearance grooves corresponding to the two scrapers. The lower side of the mounting cylinder is provided with evenly distributed stirring rollers. The scrapers can be flexibly adjusted to remove material from the inner wall, making the stirring process more controllable and reducing equipment wear.

[0008] Furthermore, a control switch assembly is provided on the front side of the housing, and the input end of the control switch assembly is electrically connected to an external power source for stable control.

[0009] Furthermore, the adjustable stirring mechanism also includes a pin, a lever, and an electric cylinder. The upper front side of the scraper is provided with a pin, and the upper side of the mounting plate is equipped with an electric cylinder. The telescopic end of the electric cylinder passes through the middle of the mounting plate and is located inside the mounting cylinder. A lever is provided at the telescopic end of the electric cylinder, and the pins are all located inside the lever. The input end of the electric cylinder is electrically connected to the output end of the control switch group, which facilitates the adjustment of whether the scraper is close to the inner wall of the stirring tank.

[0010] Furthermore, a rotating hole is provided in the middle of the upper side wall of the mixing tank, and the mounting plate is rotatably connected to the inside of the rotating hole of the mixing tank through a bearing. Symmetrically distributed connecting columns are fixedly connected between the upper side of the mounting plate and the top wall of the outer shell to facilitate connection and keep the mounting plate relatively stationary.

[0011] Furthermore, a large gear is fixedly fitted in the middle of the outer arc surface of the mixing tank, and a motor is installed on the right end of the upper side of the workbench. The output shaft of the motor passes through the right end of the workbench, and a gear is provided at the end of the output shaft of the motor. The gear meshes with the large gear, and the input end of the motor is electrically connected to the output end of the control switch group, so as to stably drive the mixing tank to rotate and complete the mixing work.

[0012] Furthermore, a discharge pipe is provided in the middle of the lower side wall of the mixing tank, and a valve is connected in series in the middle of the discharge pipe to facilitate the discharge of the prepared water-based polyurethane paint.

[0013] Furthermore, the upper end of the mixing tank is provided with an inlet pipe to facilitate the addition of water-based polyurethane paint and other mixing agents.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This proportioning device for the production of water-based polyurethane paint has the following advantages:

[0015] By using the lever and pin, the scraper can be flexibly adjusted to remove material from the inner wall. In some cases, such as when the mixing material does not easily adhere to the cylinder wall or when the requirement for mixing uniformity is not high, the scraper can be kept away from the inner wall. This can reduce equipment wear and allow for flexible adjustment of the mixing strategy according to the characteristics of different proportions of materials and the purpose of mixing, making the mixing process more controllable and meeting the mixing needs of various specific water-based polyurethane paint production. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the front side of the present invention;

[0017] Figure 2 This is a schematic diagram of the front side cross-section of the present invention;

[0018] Figure 3 This is a structural schematic diagram of the cross-sectional plane of the front side of this utility model;

[0019] Figure 4 This is a structural schematic diagram showing a cross-sectional view of the front side of the mixing tank of this utility model;

[0020] Figure 5 This is a structural schematic diagram of the cross-sectional plane of the front side of the mixing tank of this utility model.

[0021] In the diagram: 1. Outer shell; 2. Adjustable stirring mechanism; 21. Mounting cylinder; 22. Boss; 23. Scraper; 24. Pin; 25. Paddle; 26. Clearance groove; 27. Stirring roller; 28. Electric cylinder; 3. Stirring tank; 4. Workbench; 5. Control switch group; 6. Large gear; 7. Gear; 8. Motor; 9. Valve; 10. Input pipe; 11. Bearing; 12. Mounting plate; 13. Material gate; 14. Connecting column. Detailed Implementation

[0022] 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.

[0023] Please see Figure 1-5This embodiment provides a technical solution: a proportioning device for producing water-based polyurethane paint, comprising a housing 1, a control switch group 5 on the front side of the housing 1, the input end of the control switch group 5 being electrically connected to an external power source, a workbench 4 inside the housing 1, a mixing tank 3 rotatably connected to the center of the workbench 4, a large gear 6 fixedly fitted in the center of the outer arc surface of the mixing tank 3, a motor 8 mounted on the right end of the upper side of the workbench 4, the output shaft of the motor 8 passing through the right end of the workbench 4, a gear 7 at the end of the output shaft of the motor 8 meshing with the large gear 6, the input end of the motor 8 being electrically connected to the output end of the control switch group 5, and a discharge pipe in the center of the lower side wall of the mixing tank 3. A valve 9 is connected in series in the middle of the discharge pipe. An inlet pipe 10 is provided at the upper end of the mixing tank 3. Material doors 13 are hinged to the upper and lower ends of the front side wall of the outer shell 1. The worker opens the upper material door 13 and pours the water-based polyurethane paint into the mixing tank 3 through the inlet pipe 10. Then, the worker pours other proportioning agents into the mixing tank 3 through the inlet pipe 10 according to the specific situation. After that, the worker closes the upper material door 13. The worker can choose to open the lower material door 13 and manually open the valve 9 to take out the proportioned water-based polyurethane paint from the mixing tank 3 through an external pump. This makes it easy to pick up and put in the water-based polyurethane paint. It also includes an adjustable stirring mechanism 2.

[0024] Adjustable stirring mechanism 2: It includes a mounting cylinder 21, a boss 22, a scraper 23, a clearance groove 26, and a stirring roller 27. A mounting plate 12 for mounting components is provided in the middle of the upper side wall of the stirring tank 3. A rotating hole is opened in the middle of the upper side wall of the stirring tank 3. The mounting plate 12 is rotatably connected to the inside of the rotating hole of the stirring tank 3 via a bearing 11. Symmetrically distributed connecting columns 14 are fixedly connected between the upper side of the mounting plate 12 and the top wall of the outer shell 1. A mounting cylinder 21 is provided on the lower side of the mounting plate 12. A boss 22 is provided on the lower side of both ends of the inner arc surface of the mounting cylinder 21. A scraper 23 is rotatably connected to the front side of each boss 22. Clearance grooves 26 corresponding to the two scrapers 23 are opened on the lower left and right sides of the mounting cylinder 21. The adjustable stirring mechanism 2 includes evenly distributed stirring rollers 27, pins 24, levers 25, and electric cylinders 28. Pins 24 are provided on the upper front side of each scraper 23. Electric cylinders 28 are mounted on the upper side of the mounting plate 12. The telescopic end of the electric cylinder 28 passes through the middle of the mounting plate 12 and is located inside the mounting cylinder 21. Levers 25 are provided at the telescopic end of the electric cylinder 28, and the pins 24 are all located inside the levers 25. The input end of the electric cylinder 28 is electrically connected to the output end of the control switch group 5. Operating the control switch group 5 causes the motor 8 to operate. The output shaft of the motor 8 drives the gear 7 to rotate, and under meshing action, the large gear 6 drives the stirring tank 3 to rotate. At this time, the stirring tank 3 drives the water-based polyurethane paint and other mixing agents inside to rotate synchronously. During the process, the mounting plate 12 is restricted by the rotation of the connecting column 14 and remains relatively stationary with the cooperation of the bearing 11. At this time, the centrifugal force of the mixing tank 3 and the cooperation of the stirring roller 27 stir the water-based polyurethane paint and other proportioning agents, making them mixed. At the same time, the scraper 23 rotates to scrape off the proportioning material adhering to the inner wall of the mixing tank 3 (initially, the outer side of the scraper 23 is in close contact with the inner wall of the mixing tank 3), thereby improving the uniformity of the proportioning material mixing and avoiding the phenomenon of static sedimentation of the material after mixing. In some cases, it is not necessary to scrape the inner wall of the mixing tank 3. For example, when the added proportioning agent does not easily adhere to the inner wall of the mixing tank 3, or when the requirement for mixing uniformity is not so high, the scraper 23 can be left alone. By keeping the scraper close to the inner wall to reduce equipment wear, the worker operates the control switch group 5 to operate the electric cylinder 28. The telescopic end of the electric cylinder 28 pulls the lever 25 upward, and the lever 25 moves upward, which in turn moves the two pins 24 upward, thereby driving the upper end of the adjacent scraper 23 to rotate upward. At this time, the scraper 23 rotates and gradually moves away from the inner wall of the mixing drum 3. During this process, the clearance groove 26 provides clearance for the adjacent scraper 23. In this way, the scraper 23 is away from the inner wall of the mixing drum 3 and will not scrape the inner wall of the mixing drum 3. However, the scraper 23 away from the inner wall of the mixing drum 3 can still provide mixing. Depending on the characteristics of different proportions of materials and the purpose of mixing, it can be flexibly decided whether to use the scraper 23 to scrape the material on the inner wall, thereby reducing equipment wear.

[0025] The working principle of the proportioning device for producing water-based polyurethane paint provided by this utility model is as follows: First, the worker opens the upper material door 13 and pours the water-based polyurethane paint into the mixing tank 3 through the input pipe 10. Then, the worker pours other proportioning agents into the mixing tank 3 through the input pipe 10 according to the specific situation. Afterwards, the worker closes the upper material door 13 and then operates the control switch group 5 to make the motor 8 run. The output shaft of the motor 8 drives the gear 7 to rotate, and then, under the meshing action, the large gear 6 drives the mixing tank 3 to rotate. At this time, the mixing... The mixing drum 3 drives the water-based polyurethane paint and other formulation agents inside to rotate synchronously. During the rotation of the mixing drum 3, the mounting plate 12 is restricted by the rotation of the connecting column 14 and remains relatively stationary with the cooperation of the bearing 11. At this time, the centrifugal force of the mixing drum 3 and the cooperation of the stirring roller 27 stir the water-based polyurethane paint and other formulation agents, making them mixed. At the same time, the scraper 23 rotates to scrape off the formulation materials adhering to the inner wall of the mixing drum 3 (initially, the outer side of the scraper 23 is in close contact with the inner wall of the mixing drum 3), thereby improving the mixing of the formulation materials. To ensure uniform mixing and avoid sedimentation of materials after proportioning, scraping the inner wall of the mixing drum 3 is not always necessary in some cases. For example, when the added mixing agent does not easily adhere to the inner wall of the mixing drum 3, or when the requirement for uniform mixing is not so high, the scraper 23 can be kept away from the inner wall to reduce equipment wear. In this case, the operator operates the control switch group 5 to operate the electric cylinder 28. The telescopic end of the electric cylinder 28 pulls the lever 25 upward, causing the lever 25 to move upward, which in turn moves the two pins 24 upward. The upper end of the adjacent scraper 23 is rotated upwards. At this time, the scraper 23 rotates and gradually moves away from the inner wall of the mixing drum 3. During this process, the clearance groove 26 provides clearance for the adjacent scraper 23. In this way, the scraper 23 moves away from the inner wall of the mixing drum 3 and will not scrape the inner wall of the mixing drum 3. The scraper 23 away from the inner wall of the mixing drum 3 can still provide mixing. Then, the worker can choose to open the material door 13 on the lower side and manually open the valve 9 to take out the water-based polyurethane paint that has been proportioned inside the mixing drum 3 through the external pump.

[0026] It is worth noting that the motor 8 disclosed in the above embodiments can be model DT60BL80-230, the electric cylinder 28 can be model FY020, and the control switch group 5 is provided with control buttons that correspond one-to-one with the motor 8 and the electric cylinder 28 and are used to control their switching.

[0027] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A mixing device for producing water-based polyurethane paint, comprising a housing (1), wherein a workbench (4) is provided inside the housing (1), a mixing tank (3) is rotatably connected to the middle of the workbench (4), and material doors (13) are hinged to the upper and lower ends of the front sidewall of the housing (1) via hinges, characterized in that: It also includes an adjustable stirring mechanism (2); Adjustable stirring mechanism (2): It includes a mounting cylinder (21), a boss (22), a scraper (23), a clearance groove (26), and a stirring roller (27). The upper side wall of the stirring tank (3) is provided with a mounting plate (12) for mounting components. The lower side of the mounting plate (12) is provided with a mounting cylinder (21). The lower sides of the inner arc surface of the mounting cylinder (21) are provided with bosses (22). The front side of the bosses (22) is rotatably connected to scrapers (23). The lower left and right sides of the mounting cylinder (21) are provided with clearance grooves (26) corresponding to the two scrapers (23). The lower side of the mounting cylinder (21) is provided with uniformly distributed stirring rollers (27).

2. The proportioning device for producing waterborne polyurethane paint according to claim 1, characterized in that: The front side of the housing (1) is provided with a control switch group (5), and the input end of the control switch group (5) is electrically connected to an external power source.

3. The proportioning device for producing waterborne polyurethane paint according to claim 2, characterized in that: The adjustable stirring mechanism (2) also includes a pin (24), a lever (25) and an electric cylinder (28). The upper front side of the scraper (23) is provided with a pin (24). The upper side of the mounting plate (12) is equipped with an electric cylinder (28). The telescopic end of the electric cylinder (28) passes through the middle of the mounting plate (12) and is located inside the mounting cylinder (21). The telescopic end of the electric cylinder (28) is provided with a lever (25). The pin (24) is located inside the lever (25). The input end of the electric cylinder (28) is electrically connected to the output end of the control switch group (5).

4. The proportioning device for producing waterborne polyurethane paint according to claim 1, characterized in that: A rotating hole is provided in the middle of the upper side wall of the mixing tank (3). The mounting plate (12) is rotatably connected to the inside of the rotating hole of the mixing tank (3) through the bearing (11). A symmetrically distributed connecting column (14) is fixedly connected between the upper side of the mounting plate (12) and the top wall of the outer shell (1).

5. The proportioning device for producing waterborne polyurethane paint according to claim 2, characterized in that: A large gear (6) is fixedly fitted in the middle of the outer arc surface of the mixing tank (3). A motor (8) is installed on the right side of the upper side of the workbench (4). The output shaft of the motor (8) passes through the right end of the workbench (4). A gear (7) is provided at the end of the output shaft of the motor (8). The gear (7) meshes with the large gear (6). The input end of the motor (8) is electrically connected to the output end of the control switch group (5).

6. The proportioning device for producing waterborne polyurethane paint according to claim 1, characterized in that: The mixing tank (3) has a discharge pipe in the middle of its lower side wall, and a valve (9) is connected in series in the middle of the discharge pipe.

7. The proportioning device for producing waterborne polyurethane paint according to claim 1, characterized in that: The mixing tank (3) is provided with an inlet pipe (10) at its upper end.

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