Premixing device for preparing polyurethane resin for leather

Abstract

The utility model discloses a premixing device for preparing polyurethane resin for leather, relates to the field of preparation of polyurethane resin for leather, and aims to solve the problem that melting is insufficient due to the fact that molten polyurethane and auxiliary materials are not filtered in the melting stage of an existing mixing device. A supporting frame is fixedly connected to the storage barrel, a motor is fixedly connected to the supporting frame, a rotating rod is fixedly connected to an output shaft of the motor, a temporary storage frame is fixedly connected to the rotating rod, a plurality of through holes are formed in the temporary storage frame, and a melting mechanism used for melting raw materials is arranged on the temporary storage frame. According to the premixing device for preparing the polyurethane resin for the leather, polyurethane and auxiliary materials can be mixed firstly, then the polyurethane and the auxiliary materials are melted through the melting assembly, then the motor is started to drive the temporary storage frame to rotate to filter the melted polyurethane and the auxiliary materials, the melted part enters the storage barrel, and then the polyurethane and the auxiliary materials are stored in the storage barrel. Therefore, the situation of insufficient melting is avoided.

Description

Technical Field

[0001] This utility model relates to the field of preparing polyurethane resin for leather, and more specifically, it relates to a premixing device for preparing polyurethane resin for leather. Background Technology

[0002] Polyurethane comes in various forms, including soft, semi-rigid, rigid, and elastomers, and can replace materials such as rubber, nylon, and plastics. It is widely used in industries such as building materials, aerospace, and automotive machinery. Different functional additives can be added during the production of polyurethane to change the physical properties of the polyurethane resin, which requires the use of mixing equipment.

[0003] The patent with publication number CN214293891U discloses a premixing device for processing polyurethane resin for leather, including a premixing shell. Support feet are fixedly connected to the four corners of the lower end of the premixing shell. A mixing frame is fixedly connected to the lower end of the premixing shell. A stirring motor is fixedly installed at the middle of the upper end of the mixing frame. A stirring shaft is fixedly connected to the output end of the stirring motor. The stirring shaft and the mixing frame are rotatably connected through bearings. Several stirring paddles are fixedly connected to the stirring shaft.

[0004] The premixing device in the above scheme has a pre-melting cylinder, an electromagnetic heating coil, a rotating shaft, a rotating rod, and a mixing rod inside the premixing shell. The electromagnetic heating coil can uniformly heat the side wall of the pre-melting cylinder, and the mixing rod can be rotated and stirred by the premixing motor, so that the polyurethane is heated evenly. However, this device does not filter the melted polyurethane and auxiliary materials during the melting stage, which may result in insufficient melting.

[0005] Therefore, a new solution is needed to address this problem. Utility Model Content

[0006] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a premixing device for preparing polyurethane resin for leather. This device can first mix polyurethane and auxiliary materials, then melt the polyurethane and auxiliary materials through a melting component, and then start a motor to drive a temporary storage frame to filter the melted polyurethane and auxiliary materials, and allow the melted portion to enter a storage tank, thereby avoiding incomplete melting.

[0007] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a premixing device for preparing polyurethane resin for leather includes a storage tank, a support frame fixedly connected to the storage tank, a motor fixedly connected to the support frame, a rotating rod fixedly connected to the output shaft of the motor, a temporary storage frame fixedly connected to the rotating rod, a plurality of through holes being provided on the temporary storage frame, and a melting mechanism for melting raw materials being provided on the temporary storage frame.

[0008] The present invention is further configured such that: the melting mechanism includes two heating plates slidably connected within a temporary storage frame and several connecting columns fixedly connected between the two heating plates; an inlet is provided on the heating plate near the support frame; the connecting columns are slidably connected to the temporary storage frame; and a driving component for driving the heating plates to slide is provided on the support frame.

[0009] The present invention is further configured such that: the driving component includes a plurality of electric push rods fixedly connected to the support frame and a limiting block fixedly connected to the output end of the electric push rods; and a groove is provided on the heating plate near the support frame for the limiting block to slide.

[0010] The present invention is further configured such that: a plurality of fixing blocks are fixedly connected to the storage bucket, a sliding rod is slidably connected to the fixing blocks, a scraper ring is fixedly connected to the plurality of sliding rods, a positioning frame is fixedly connected to the support frame, a positioning block is fixedly connected to the output end of the electric push rod, a pull rope is fixedly connected to the sliding rod, and the other end of the pull rope passes through the adjacent positioning frame and is fixedly connected to the adjacent positioning block.

[0011] The present invention is further configured such that: a guide plate is fixedly connected to the bottom side of the storage tank, and a plurality of stirring rods are fixedly connected to the rotating rod.

[0012] The present invention is further configured such that: a cavity is provided inside the rotating rod, and an inlet hole and several outlet holes are provided on the rotating rod, wherein the inlet hole and several outlet holes are all connected to the cavity.

[0013] In summary, this utility model has the following beneficial effects: during mixing, polyurethane and excipients can be first placed between two heating plates through the inlet, and then the motor is turned on to initially mix the polyurethane and excipients. Next, the heating plates melt the polyurethane and excipients and cause the two heating plates to slide. Then, the motor is started to drive the temporary storage frame to rotate and filter the melted polyurethane and excipients to avoid insufficient melting. Subsequently, the melted part will enter the storage tank, and finally the stirring rod will further mix the melted polyurethane and excipients to improve the mixing effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 A cross-sectional view of this utility model Figure 1 ;

[0016] Figure 3 A cross-sectional view of this utility model Figure 2 ;

[0017] Figure 4A cross-sectional view of this utility model Figure 3 .

[0018] In the diagram: 1. Storage bucket; 2. Support frame; 3. Motor; 4. Rotating rod; 5. Temporary storage frame; 6. Through hole; 7. Heating plate; 8. Connecting column; 9. Feed inlet; 10. Electric push rod; 11. Limiting block; 12. Groove; 13. Fixing block; 14. Sliding rod; 15. Scraper ring; 16. Positioning frame; 17. Positioning block; 18. Pull rope; 19. Guide plate; 20. Stirring rod; 21. Cavity; 22. Feed hole; 23. Discharge hole. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] A premixing apparatus for preparing polyurethane resin for leather, such as Figures 1-4 As shown, the device includes a storage tank 1, a support frame 2 fixedly connected to the storage tank 1, a motor 3 fixedly connected to the support frame 2, a rotating rod 4 fixedly connected to the output shaft of the motor 3, a temporary storage frame 5 fixedly connected to the rotating rod 4, a plurality of through holes 6 on the temporary storage frame 5, and a melting mechanism for melting raw materials on the temporary storage frame 5. The melting mechanism includes two heating plates 7 slidably connected inside the temporary storage frame 5 and a plurality of connecting columns 8 fixedly connected between the two heating plates 7. A feed inlet 9 is opened on the heating plate 7 near the support frame 2. The connecting columns 8 are slidably connected to the temporary storage frame 5. A driving assembly for driving the heating plates 7 to slide is provided on the support frame 2. The driving assembly includes a plurality of electric push rods 10 fixedly connected to the support frame 2 and a limiting block 11 fixedly connected to the output end of the electric push rods 10. A groove 12 for the limiting block 11 to slide is opened on the heating plate 7 near the support frame 2.

[0021] like Figures 1-4As shown, during premixing, polyurethane and excipients are first fed into the space between two heating plates 7 through the feed inlet 9. Then, the motor 3 is started, which drives the two heating plates 7 to rotate, mixing the polyurethane and excipients between them. Next, the motor 3 is turned off, and the heating plates 7 are turned on again to melt the polyurethane and excipients. The heating time is then set according to the weight of the polyurethane and excipients. The motor 3 is then turned on again, and the heating plates 7 are kept on. Then, the electric push rod 10 is extended, which moves the heating plates 7 closer to the bottom of the storage frame 5. At this time, several through holes 6 are located between the two heating plates 7. The melted polyurethane and excipients will pass through the through holes 6 due to centrifugal force and come into contact with the storage container 1. Then, the melted polyurethane and excipients will... As the polyurethane and excipients slide down to the bottom of storage container 1 due to gravity, the unmelted or semi-melted polyurethane and excipients will adhere to the inner wall of temporary storage frame 5. At this time, motor 3 is turned off and electric push rod 10 is activated to retract, so that heating plate 7 moves away from the bottom of temporary storage frame 5. Heating plate 7 will then scrape the inner wall of temporary storage frame 5, allowing the unmelted or semi-melted polyurethane and excipients to return to heating plate 7 for reheating. After 5-10 minutes, electric push rod 10 extends again, and the polyurethane and excipients that have been melted a second time will also pass through through hole 6 and come into contact with storage container 1. If there are still unmelted polyurethane and excipients, electric push rod 10 will drive heating plate 7 to move back and forth until all polyurethane and excipients melt and enter storage container 1.

[0022] like Figures 1-3 As shown, several fixing blocks 13 are fixedly connected to the storage bucket 1, and sliding rods 14 are slidably connected to the fixing blocks 13. Scraper rings 15 are fixedly connected to the sliding rods 14. Positioning frames 16 are fixedly connected to the support frame 2. Positioning blocks 17 are fixedly connected to the output end of the electric push rod 10. Pull ropes 18 are fixedly connected to the sliding rods 14. The other end of the pull ropes 18 passes through the adjacent positioning frames 16 and is fixedly connected to the adjacent positioning blocks 17.

[0023] like Figures 1-3 As shown, when the electric push rod 10 extends, the output end of the electric push rod 10 will drive the positioning block 17 away from the support frame 2. At this time, the pull rope 18 will be pulled by the positioning block 17 to slide on the positioning frame 16, and the sliding rod 14 will be pulled by the pull rope 18 to drive the scraper ring 15 to move upward. When the electric push rod 10 is started to retract, the pull rope 18 will no longer pull the sliding rod 14, and the scraper ring 15 will fall due to gravity and scrape the melted polyurethane and auxiliary materials on the inner wall of the storage tank 1 into the storage tank 1, so as to avoid the melted polyurethane and auxiliary materials from accumulating at the corresponding through hole 6 of the storage tank 1. If there are still unmelted polyurethane and auxiliary materials, the scraper ring 15 will work in the same way to scrape the melted polyurethane and auxiliary materials into the storage tank 1.

[0024] like Figures 2-4As shown, a guide plate 19 is fixedly connected to the bottom side of the storage tank 1, which can reduce the accumulation of melted polyurethane and auxiliary materials on the bottom side of the storage tank 1 and facilitate the discharge. Several stirring rods 20 are fixedly connected to the rotating rod 4. When the melted polyurethane and auxiliary materials enter the storage tank 1, they will be stirred and further mixed by the stirring rods 20.

[0025] like Figures 1-4 As shown, a cavity 21 is provided inside the rotating rod 4, and an inlet hole 22 and several outlet holes 23 are provided on the rotating rod 4. The inlet hole 22 and several outlet holes 23 are all connected to the cavity 21. When other liquid additives need to be added, the liquid additives can be poured in through the inlet hole 22. Then the liquid additives will enter the storage tank 1 through the cavity 21 and the outlet holes 23 to mix with the melted polyurethane and additives.

[0026] Working principle: Before using the device, connect the external discharge device to the bottom opening of the storage tank 1. During pre-mixing, first put the polyurethane and auxiliary materials into the space between the two heating plates 7 through the inlet 9. Then start the motor 3. The motor 3 drives the two heating plates 7 to rotate, so that the polyurethane and auxiliary materials are mixed between the two heating plates 7. Then turn off the motor 3 and start the heating plates 7 to melt the polyurethane and auxiliary materials. Then set the heating time according to the weight of the polyurethane and auxiliary materials. Then turn on the motor 3 again and keep the heating plates 7 in the open state. Then start the electric push rod 10 to extend. Rod 10 will move heating plate 7 closer to the bottom side of temporary storage frame 5. At this time, several through holes 6 are between the two heating plates 7. The melted polyurethane and auxiliary materials will come into contact with each other through the through holes 6 due to centrifugal force. Then, the melted polyurethane and auxiliary materials will slide to the bottom side of storage bucket 1 due to gravity. When electric push rod 10 extends, the output end of electric push rod 10 will move positioning block 17 away from support frame 2. At this time, pull rope 18 will be pulled by positioning block 17 to slide on positioning frame 16. At this time, sliding rod 14 will be pulled by pull rope 18 to move scraper ring 15 upward.

[0027] Unmelted or partially melted polyurethane and excipients will adhere to the inner wall of the temporary storage frame 5. At this time, the motor 3 is turned off and the electric push rod 10 is activated to retract, causing the heating plate 7 to move away from the inner bottom side of the temporary storage frame 5. The heating plate 7 will then scrape the inner wall of the temporary storage frame 5, allowing the unmelted or partially melted polyurethane and excipients to return to the heating plate 7 for reheating. At this time, the pull rope 18 will no longer pull the sliding rod 14, and the scraper ring 15 will fall due to gravity, scraping the melted polyurethane and excipients on the inner wall of the storage bucket 1 into the storage bucket 1, preventing the melted polyurethane and excipients from remaining in the storage bucket 1. When the material accumulates at the corresponding through-hole 6, after 5-10 minutes, the motor 3 is turned on and the electric push rod 10 is extended again. The scraper ring 15 will then be driven upward by the pull rope 18. The polyurethane and auxiliary materials that have been melted a second time will also come into contact with the storage tank 1 through the through-hole 6. If there are still unmelted polyurethane and auxiliary materials, the operation will be repeated in this way until all the polyurethane and auxiliary materials are melted and enter the storage tank 1. When the polyurethane and auxiliary materials enter the storage tank 1, the motor 3 will remain running and drive the stirring rod 20 to rotate to further mix the polyurethane and auxiliary materials.

[0028] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A pre-mixing device for the preparation of polyurethane resins for leather, comprising a storage tank (1), characterized in that: The storage barrel (1) is fixedly connected with a support frame (2), the support frame (2) is fixedly connected with a motor (3), the motor (3) output shaft is fixedly connected with a rotating rod (4), the rotating rod (4) is fixedly connected with a temporary storage frame (5), a plurality of through holes (6) are formed in the temporary storage frame (5), and a melting mechanism for melting raw materials is arranged on the temporary storage frame (5).

2. A pre-mixing device for the preparation of polyurethane resins for leather according to claim 1, characterized in that: The melting mechanism comprises two heating plates (7) slidably connected in the temporary storage frame (5) and a plurality of connecting columns (8) fixedly connected between the two heating plates (7), a feeding port (9) is formed in the heating plate (7) close to the support frame (2), the connecting column (8) is slidably connected with the temporary storage frame (5), and the support frame (2) is provided with a driving assembly for driving the heating plate (7) to slide.

3. A pre-mixing device for the preparation of polyurethane resins for leather according to claim 2, characterized in that: The driving assembly comprises a plurality of electric push rods (10) fixedly connected on the support frame (2) and a limiting block (11) fixedly connected at the output end of the electric push rod (10), and a groove (12) is formed in the heating plate (7) close to the support frame (2) for the sliding of the limiting block (11).

4. A pre-mixing device for the preparation of polyurethane resins for leather according to claim 3, characterized in that: A plurality of fixed blocks (13) are fixedly connected on the storage barrel (1), a sliding rod (14) is slidably connected on the fixed block (13), a scraping ring (15) is fixedly connected on the sliding rod (14), a positioning frame (16) is fixedly connected on the support frame (2), a positioning block (17) is fixedly connected at the output end of the electric push rod (10), a pull rope (18) is fixedly connected on the sliding rod (14), and the other end of the pull rope (18) is fixedly connected with the adjacent positioning block (17) through the adjacent positioning frame (16).

5. The pre-mixing device for preparing a polyurethane resin for leather according to claim 1, characterized in that: A flow guide disc (19) is fixedly connected to the inner bottom side of the storage barrel (1), and a plurality of stirring rods (20) are fixedly connected on the rotating rod (4).

6. A pre-mixing device for preparing a polyurethane resin for leather according to claim 1, characterized in that: A cavity (21) is formed in the rotating rod (4), an inlet hole (22) and a plurality of outlet holes (23) are formed in the rotating rod (4), and the inlet hole (22) and the plurality of outlet holes (23) are in communication with the cavity (21).

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