Hot melting device for producing thermoplastic polyurethane elastomer

Abstract

The utility model discloses a hot melting device for thermoplastic polyurethane elastomer production, which comprises a fixing frame, a stirring rod and a discharge pipe, a stirring barrel is arranged in the fixing frame, the top of the stirring barrel is fixedly connected with a feed pipe, the discharge pipe is fixedly connected to the bottom of the stirring barrel, a motor is fixedly mounted at the top of the stirring barrel, and the discharge pipe is fixedly connected to the bottom of the stirring barrel. A rotating rod is rotationally connected into the stirring barrel, one end of an output shaft of the motor is fixedly connected with the top of the rotating rod, the stirring rod is fixedly connected to the outer side of the rotating rod, a lifting mechanism is arranged in the fixing frame, a connecting rod is fixedly connected to the outer side of the rotating rod, a cleaning mechanism is arranged on the outer side of the connecting rod, and universal wheels are arranged at the bottom of the fixing frame at equal intervals. And a heating pipe is arranged in the stirring barrel. The utility model aims to solve the problems that when materials are stirred, the materials are adhered to the inner wall or the bottom of the box body, so that the adhered materials can influence the uniform mixing of the materials by the stirring equipment, the heating is not uniform, and the product quality is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hot-melt devices, in particular to a hot-melt device for producing thermoplastic polyurethane elastomers. Background Art

[0002] Thermoplastic polyurethane elastomer is also called thermoplastic polyurethane rubber. Thermoplastic polyurethane rubber is cross-linked by hydrogen bonds between molecules or light cross-linking between macromolecular chains. These two cross-linking structures are reversible as the temperature rises or falls. When processing thermoplastic polyurethane elastomer, a hot melt device is required to process it.

[0003] After searching, a Chinese patent discloses a hot melt device for the production of thermoplastic polyurethane elastomer, and its authorization announcement number is (CN209095790U), which includes a box body, a feeding port is provided at the upper left end of the box body, a cover plate is provided at the upper end of the feeding port, the box body is a cylindrical barrel, a heating plate is provided on the inner wall of the box body, and a stirring device is provided inside the box body to allow the material to convect.

[0004] The existing device is improved by adding a stirring device. Under the drive of the driving motor, the lifting shaft drives the lifting blades and the lifting cylinder to rotate. Under the action of the lifting blades, the material rises along the lifting cylinder and then flows back to the box along the return pipe. The stirring rod will also stir the material during the falling process. This convection and stirring method greatly improves the heating effect of the material, eliminates the drawbacks of the existing device, and also facilitates the later mobile feeding, which is highly practical. However, when the material is stirred, the material will stick to the inner wall or bottom of the box. The sticky material will affect the uniform mixing of the material by the stirring equipment, and the heating will be uneven, resulting in a decrease in product quality. Utility Model Content

[0005] The purpose of the utility model is to provide a hot melt device for producing thermoplastic polyurethane elastomer to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: it includes a fixed frame, a stirring rod and a discharge pipe, a stirring barrel is arranged inside the fixed frame, a feeding pipe is fixedly connected to the top of the stirring barrel, the discharge pipe is fixedly connected to the bottom of the stirring barrel, a motor is fixedly installed on the top of the stirring barrel, a rotating rod is rotatably connected inside the stirring barrel, one end of the motor output shaft is fixedly connected to the top of the rotating rod, the stirring rod is fixedly connected to the outside of the rotating rod, a lifting mechanism is arranged inside the fixed frame, a connecting rod is fixedly connected to the outside of the rotating rod, a cleaning mechanism is arranged on the outside of the connecting rod, universal wheels are equidistantly arranged at the bottom of the fixed frame, and a heating tube is arranged inside the stirring barrel.

[0007] As a further preferred embodiment of the present technical solution, the cleaning mechanism comprises a slide groove, the slide groove is opened inside the connecting rod, and a slider is slidably connected inside the slide groove.

[0008] As a further preferred embodiment of the present technical solution, the cleaning mechanism also includes a spring, which is fixedly connected between one side of the slider and the inner wall of the slide groove. A slide rod is slidably connected inside the connecting rod, and one end of the slide rod is fixedly connected to one side of the slider.

[0009] As a further preferred embodiment of the present technical solution, a first scraper is fixedly connected to one side of the sliding rod, and one side of the first scraper is in contact with the inner wall of the mixing barrel.

[0010] As a further preferred embodiment of the present technical solution, a second scraper is fixedly connected to the bottom of the rotating rod, and the bottom of the second scraper is in conflict with the bottom of the mixing barrel.

[0011] As a further preferred embodiment of the present technical solution, the lifting mechanism comprises a cylinder, the cylinder is fixedly installed inside the fixing frame, and one end of the movable rod of the cylinder is fixedly connected to the bottom of the mixing barrel.

[0012] As a further preferred embodiment of the present technical solution, the lifting mechanism further comprises a displacement plate, the displacement plate is fixedly connected to the outside of the mixing barrel, a guide rod is equidistantly fixedly connected to the top of the fixed frame, and the inside of the displacement plate is slidably connected to the outside of the guide rod.

[0013] The utility model provides a hot melt device for producing thermoplastic polyurethane elastomer, which has the following

[0014] Beneficial effects:

[0015] (1) The utility model adjusts the height of the device pipeline by starting the lifting mechanism, so that the height of the device is adjusted to a suitable position to adapt to the cooperation of different types of extruders, thereby increasing the practicality of the device.

[0016] (2) The utility model uses a cleaning mechanism to cooperate with the rotation of the rotating rod to scrape off the material adhering to the inner wall and bottom of the mixing barrel, so that it can be mixed with the material being stirred and continue to be heated and processed, thereby increasing the processing efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the cross-sectional three-dimensional structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the stirring mechanism structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the cleaning mechanism structure of the utility model;

[0021] In the figure: 1. fixed frame; 2. feed pipe; 3. cylinder; 4. motor; 5. mixing barrel; 6. displacement plate; 7. guide rod; 8. discharge pipe; 9. universal wheel; 10. first scraper; 11. stirring rod; 12. heating tube; 13. second scraper; 14. connecting rod; 15. rotating rod; 16. sliding rod; 17. spring; 18. slide groove; 19. slider. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0023] The utility model provides a technical solution: Figure 1-Figure 4 As shown, in this embodiment, a hot melt device for producing a thermoplastic polyurethane elastomer includes a fixed frame 1, a stirring rod 11 and a discharge pipe 8. A stirring barrel 5 is arranged inside the fixed frame 1, a feed pipe 2 is fixedly connected to the top of the stirring barrel 5, the discharge pipe 8 is fixedly connected to the bottom of the stirring barrel 5, a motor 4 is fixedly installed on the top of the stirring barrel 5, a rotating rod 15 is rotatably connected inside the stirring barrel 5, one end of the output shaft of the motor 4 is fixedly connected to the top of the rotating rod 15, the stirring rod 11 is fixedly connected to the outside of the rotating rod 15, a lifting mechanism is arranged inside the fixed frame 1, a connecting rod 14 is fixedly connected to the outside of the rotating rod 15, a cleaning mechanism is arranged on the outside of the connecting rod 14, universal wheels 9 are equidistantly arranged at the bottom of the fixed frame 1, and a heating pipe 12 is arranged inside the stirring barrel 5.

[0024] First, the device is moved to one side of the extruder by the universal wheel 9. The extruder is used to extrude the thermoplastic polyurethane raw material to form the initial shape of the elastomer. However, different extruders have different models. At this time, it is necessary to adjust the height of the hot melt device to adapt to different models of extruders. Then, the height of the device is adjusted by starting the lifting mechanism, so that the height of the device is adjusted to a suitable position, thereby increasing the practicality of the device. Then, the material is injected into the mixing barrel 5 through the feed pipe 2, and then the output shaft of the start-up motor 4 is driven to rotate the rotating rod 15 and drive the stirring rod 11 to stir the material. Then, the heating tube 12 can be used to better process the material. At the same time, the cleaning mechanism is used to cooperate with the rotation of the rotating rod 15 to scrape off the material adhered to the inner wall and bottom of the mixing barrel 5, so that it is mixed with the material being stirred and continues to be heated and processed, thereby increasing the processing efficiency of the device, and finally the material is discharged through the discharge pipe 8.

[0025] like Figure 1-Figure 4As shown, the cleaning mechanism includes a slide groove 18, which is opened inside the connecting rod 14, and a slider 19 is slidably connected inside the slide groove 18. The cleaning mechanism also includes a spring 17, which is fixedly connected between one side of the slider 19 and the inner wall of the slide groove 18. The connecting rod 14 is slidably connected to a slide rod 16, one end of the slide rod 16 is fixedly connected to one side of the slider 19, one side of the slide rod 16 is fixedly connected to a first scraper 10, one side of the first scraper 10 is in conflict with the inner wall of the mixing barrel 5, and the bottom of the rotating rod 15 is fixedly connected to the second scraper 13, and the bottom of the second scraper 13 is in conflict with the bottom of the mixing barrel 5.

[0026] When stirring, the connecting rod 14 rotates to drive one side of the first scraper 10 to move and scrape the inner wall of the mixing barrel 5, thereby scraping off the material adhering to the inner wall. Then, the first scraper 10 contacts the inner wall of the mixing barrel 5, thereby driving the slide bar 16 to slide inside the connecting rod 14 and driving the slider 19 to move to compress the spring 17. Then, the reaction force of the spring 17 makes one side of the first scraper 10 always contact the inner wall of the mixing barrel 5. Then, when the rotating rod 15 rotates, it drives the second scraper 13 to rotate to scrape the bottom of the mixing barrel 5, thereby further increasing the practicality of the device.

[0027] like Figure 1-Figure 4 As shown, the lifting mechanism includes a cylinder 3, which is fixedly installed inside the fixed frame 1. One end of the movable rod of the cylinder 3 is fixedly connected to the bottom of the mixing barrel 5. The lifting mechanism also includes a displacement plate 6, which is fixedly connected to the outside of the mixing barrel 5. A guide rod 7 is equidistantly fixedly connected to the top of the fixed frame 1, and the inside of the displacement plate 6 is slidably connected to the outside of the guide rod 7.

[0028] When the height of the device needs to be adjusted, the movable rod of the cylinder 3 is started to move, driving the mixing barrel 5 to move and driving the displacement plate 6 to slide on the outside of the guide rod 7, thereby guiding the movement of the mixing barrel 5, making the mixing barrel 5 move more smoothly, and then the device and the extruder can be better docked, thereby increasing the applicability of the device.

[0029] The utility model provides a hot melt device for producing thermoplastic polyurethane elastomer, and the specific working principle is as follows: first, the device is driven to move to one side of the extruder through the universal wheel 9, and then, the movable rod of the cylinder 3 is started to move to drive the stirring barrel 5 to move and drive the displacement plate 6 to slide on the outer side of the guide rod 7, so as to guide the movement of the stirring barrel 5, so that the stirring barrel 5 moves more smoothly, and then the device and the extruder can be better docked, and then, the material is injected into the stirring barrel 5 through the feed pipe 2, and then the output shaft of the motor 4 is started to rotate to drive the rotating rod 15 to rotate and drive the stirring rod 11 to stir the material, and then the feeding The heat pipe 12 can process the material better. At the same time, the connecting rod 14 rotates to drive one side of the first scraper 10 to move and scrape the inner wall of the mixing barrel 5, thereby scraping the material adhering to the inner wall. Then, the first scraper 10 contacts the inner wall of the mixing barrel 5, thereby driving the slide bar 16 to slide inside the connecting rod 14 and driving the slide bar 19 to move to compress the spring 17. Then, the reaction force of the spring 17 makes one side of the first scraper 10 always contact the inner wall of the mixing barrel 5. Then, when the rotating rod 15 rotates, it drives the second scraper 13 to rotate to scrape the bottom of the mixing barrel 5. Finally, the material is discharged through the discharge pipe 8.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hot melt device for producing thermoplastic polyurethane elastomer, comprising a fixed frame (1), a stirring rod (11) and a discharge pipe (8), characterized in that: A stirring barrel (5) is arranged inside the fixed frame (1), a feeding pipe (2) is fixedly connected to the top of the stirring barrel (5), the discharging pipe (8) is fixedly connected to the bottom of the stirring barrel (5), a motor (4) is fixedly installed on the top of the stirring barrel (5), a rotating rod (15) is rotatably connected inside the stirring barrel (5), one end of the output shaft of the motor (4) is fixedly connected to the top of the rotating rod (15), the stirring rod (11) is fixedly connected to the outside of the rotating rod (15), a lifting mechanism is arranged inside the fixed frame (1), a connecting rod (14) is fixedly connected to the outside of the rotating rod (15), a cleaning mechanism is arranged on the outside of the connecting rod (14), universal wheels (9) are equidistantly arranged at the bottom of the fixed frame (1), and a heating tube (12) is arranged inside the stirring barrel (5).

2. A hot melt device for producing thermoplastic polyurethane elastomer according to claim 1, characterized in that: The cleaning mechanism comprises a slide groove (18), wherein the slide groove (18) is arranged inside the connecting rod (14), and a sliding block (19) is slidably connected inside the slide groove (18).

3. A hot melt device for producing thermoplastic polyurethane elastomer according to claim 2, characterized in that: The cleaning mechanism further comprises a spring (17), wherein the spring (17) is fixedly connected between one side of the slider (19) and the inner wall of the slide groove (18), and the interior of the connecting rod (14) is slidably connected to a slide rod (16), and one end of the slide rod (16) is fixedly connected to one side of the slider (19).

4. A hot melt device for producing thermoplastic polyurethane elastomer according to claim 3, characterized in that: One side of the sliding rod (16) is fixedly connected to a first scraper (10), and one side of the first scraper (10) is in contact with the inner wall of the mixing barrel (5).

5. A hot melt device for producing thermoplastic polyurethane elastomer according to claim 1, characterized in that: The bottom of the rotating rod (15) is fixedly connected to a second scraper (13), and the bottom of the second scraper (13) is in contact with the bottom of the mixing barrel (5).

6. A hot melt device for producing thermoplastic polyurethane elastomer according to claim 1, characterized in that: The lifting mechanism comprises a cylinder (3), which is fixedly mounted inside the fixed frame (1), and one end of a movable rod of the cylinder (3) is fixedly connected to the bottom of the mixing barrel (5).

7. A hot melt device for producing thermoplastic polyurethane elastomer according to claim 1, characterized in that: The lifting mechanism further comprises a displacement plate (6), wherein the displacement plate (6) is fixedly connected to the outer side of the mixing barrel (5), a guide rod (7) is fixedly connected to the top of the fixing frame (1) at equal distances, and the interior of the displacement plate (6) is slidably connected to the outer side of the guide rod (7).

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