Cooling traction mechanism for polyurethane adhesive film

Abstract

The utility model relates to a cooling traction mechanism for a polyurethane adhesive film. The cooling traction mechanism comprises a base plate, the cooling assembly comprises at least two cooling pipes and a driving mechanism, the at least two cooling pipes are rotatably mounted at the top of the base plate, the driving mechanism is fixed on the base plate and used for driving the cooling pipes to rotate, and the rotating directions of the cooling pipes are opposite; the cooling traction mechanism for the polyurethane adhesive film is simple in structure, the polyurethane adhesive film is wound around the top of one cooling pipe and then wound out of the bottom of the other cooling pipe, and therefore cooling of the two side faces of the polyurethane adhesive film is completed; then the cooled polyurethane bonding films are wound around an adjusting roller, tensioning work of the polyurethane bonding films is completed through a pushing air cylinder, and the situation that the polyurethane bonding films are mutually overlapped and bonded in the cooling and winding process is avoided; the two sides of the polyurethane bonding film are effectively cooled, the cooling effect is good, the uniformity of the thickness of the film can be ensured, and the quality problem caused by different thicknesses is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of film equipment, and particularly relates to a cooling and traction mechanism for a polyurethane adhesive film. Background Art

[0002] The polyurethane adhesive film, also known as the PU film, is mainly made of polyurethane (abbreviated as PU), and is an environmentally friendly material that does not cause any harm to the human skin. This material has excellent physical properties, including good elasticity and lightness, as well as excellent waterproof performance, and is widely used in the fields of clothing fabrics, medical and health, leather, etc.

[0003] After the production of the polyurethane adhesive film, in order to ensure the uniformity of the film thickness and avoid quality problems caused by uneven thickness, it is necessary to cool both sides of the adhesive film when pulling the adhesive film.

[0004] The traditional film cooling and traction device generally includes a first cooling roller and a pressure roller. After the film passes through the first cooling roller and the pressure roller, it enters the next process. In this way, the first cooling roller can only cool one side of the film, and the cooling effect of the film is poor. Due to the inconsistent temperature on both sides of the adhesive film, it is easy to shrink and wrinkle, affecting the performance and quality of the adhesive film. Summary of the Utility Model

[0005] The utility model provides a cooling and traction mechanism for a polyurethane adhesive film, which solves the defect that in the prior art, only one side of the adhesive film can be cooled, resulting in wrinkles on both sides of the adhesive film due to inconsistent temperature, affecting the performance and quality of the adhesive film.

[0006] To achieve the above object, the technical solution adopted by the utility model is: a cooling and traction mechanism for a polyurethane adhesive film, which includes:

[0007] A substrate;

[0008] A cooling assembly, the cooling assembly includes at least two cooling tubes rotatably installed on the top of the substrate and a driving mechanism fixed on the substrate for driving the cooling tubes to rotate, and the rotation directions of the cooling tubes are opposite;

[0009] The cooling assembly cools both sides of the polyurethane adhesive film.

[0010] Optimally, the cooling tube includes a cooling outer tube rotatably installed on the top of the substrate, a cooling inner tube coaxially fixed inside the cooling outer tube, a flow channel plate spirally arranged on the outer peripheral surface of the cooling inner tube, and a cooling flow channel formed in the flow channel plate.

[0011] Optimally, the cooling pipe further includes end caps fixed to both sides of the outer cooling pipe, water pipes coaxially fixed to the opposite sides of the end caps, connecting pipes fixed between the outer cooling pipe and the inner cooling pipe, and water holes annularly arranged on the connecting pipes.

[0012] Optimally, it further includes a tensioning assembly fixed to the top of the substrate. The tensioning assembly includes a sleeve movably arranged on one side of the cooling pipe, a push rod elastically mounted on the side of the sleeve close to the cooling pipe, an adjusting roller rotatably mounted between the push rods, and a pressing roller liftably arranged above the adjusting roller.

[0013] Optimally, the tensioning assembly further includes a limiting plate fixed to the top of the substrate, a limiting groove penetrating through the limiting plate, and an adjusting shaft fixed to the push rod and penetrating through the limiting groove. The adjusting roller is rotatably sleeved on the adjusting shaft.

[0014] Optimally, the tensioning assembly further includes a pressing plate arranged in the sleeve and fixed to the push rod, and a spring arranged in the sleeve. The spring abuts against the side of the pressing plate away from the push rod.

[0015] Optimally, the tensioning assembly further includes a second support frame fixed to the top of the substrate, a pressing cylinder fixed to the second support frame, and a pressing shaft connected to the pressing cylinder. The pressing roller is rotatably sleeved on the pressing shaft.

[0016] Optimally, the driving mechanism includes a driving motor fixed to the top of the substrate, a driving wheel connected to the driving motor, a driven wheel sleeved on the connecting pipe, and a synchronous belt wound around the driving wheel and the driven wheel.

[0017] Optimally, the diameter of the driving wheel is smaller than that of the driven wheel.

[0018] Due to the application of the above technical solutions, the utility model has the following advantages compared with the prior art:

[0019] The cooling and traction mechanism of the polyurethane adhesive film of the utility model has a simple structure. The polyurethane adhesive film is wound around the top of one of the cooling pipes and then wound out from the bottom of the other cooling pipe, thereby completing the cooling of both sides of the polyurethane adhesive film; then the cooled polyurethane adhesive film is wound around the adjusting roller, and the tensioning work of the polyurethane adhesive film is completed by the pushing cylinder, avoiding the overlapping and bonding of the polyurethane adhesive film during cooling and winding; both sides of the polyurethane adhesive film are effectively cooled, and the cooling effect is good, which can ensure the uniformity of the film thickness and avoid quality problems caused by inconsistent thickness.

[0020] Further, the diameter of the driving wheel is smaller than that of the driven wheel to reduce the rotation speed of the cooling pipe, ensure sufficient contact time between the polyurethane adhesive film and the cooling pipe, and improve the cooling efficiency of the polyurethane adhesive film. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the present utility model;

[0022] Figure 2 It is a schematic structural diagram of another angle of the present utility model;

[0023] Figure 3 It is a cross-sectional view of the cooling pipe of the present utility model;

[0024] Figure 4 It is a cross-sectional view of the sleeve of the present utility model;

[0025] Figure 5 It is a winding schematic diagram of the polyurethane adhesive film of the present utility model;

[0026] Description of the Reference Numerals:

[0027] 1, substrate; 2, first support frame; 3, bearing seat; 4, cooling outer pipe; 5, cooling inner pipe; 6, flow channel plate; 7, cooling flow channel; 8, first end cover; 9, second end cover; 10, water inlet pipe; 11, drain pipe; 12, first connecting pipe; 13, second connecting pipe; 14, water inlet hole; 15, drain hole; 16, driving motor; 17, driving wheel; 18, driven wheel; 19, synchronous belt; 20, second support frame; 21, pressing cylinder; 22, pressing shaft; 23, pressing roller; 24, third support frame; 25, fourth support frame; 26, limiting plate; 27, limiting groove; 28, adjusting shaft; 29, adjusting roller; 30, pushing cylinder; 31, sleeve; 32, spring; 33, abutting plate; 34, push rod. Detailed Embodiment

[0028] The present utility model will be further described below in conjunction with the embodiments shown in the drawings.

[0029] As Figure 1 , 2 shown, it is a schematic diagram of the cooling and traction mechanism of the polyurethane adhesive film of the present utility model. It is usually used to traction the polyurethane adhesive film, and during the traction process, cool the two sides of the polyurethane adhesive surface. Uniform cooling can ensure the uniformity of the film thickness, avoid quality problems caused by uneven thickness, and at the same time can also optimize the performance of the film.

[0030] The traction mechanism includes a cooling component and a tensioning component. The cooling component cools the two sides of the polyurethane adhesive film, and the tensioning component tensions the cooled polyurethane adhesive film to prevent the polyurethane adhesive film from overlapping and bonding with each other during cooling and winding.

[0031] The substrate 1 is fixed on the machine table by means of screw fastening. The first support frame 2 is fixed on the top of the substrate 1 and is used for installing the cooling component. There are at least two cooling pipes, which are respectively rotatably installed on the top of the first support frame 2. The polyurethane adhesive film bypasses the top of one of the cooling pipes and then winds out from the bottom of the other cooling pipe, so as to complete the cooling of both sides of the polyurethane adhesive film (the rotation directions of the two cooling pipes are opposite).

[0032] As Figure 3 shown, the cooling pipe includes a cooling outer pipe 4 and a cooling inner pipe 5 arranged coaxially, and the diameter of the cooling inner pipe 5 is smaller than that of the cooling outer pipe 4. The flow channel plate 6 is spirally arranged on the outer peripheral surface of the cooling inner pipe 5, and the cooling flow channels 7 are arranged between the flow channel plates 6. The fluid (such as water) is introduced from one side of the cooling outer pipe 4 and is distributed in the cooling flow channels 7. The spirally arranged flow channel plate 6 can play a buffering role for the water and avoid the impact of the water on the stability of the cooling outer pipe 4.

[0033] By arranging the cooling inner pipe 5, water can be filled between the cooling inner pipe 5 and the cooling outer pipe 4, reducing the water consumption. The cooling inner pipe 5 is a hollow pipe, so as to reduce the weight of the overall cooling pipe and make it more convenient for the cooling pipe to rotate.

[0034] The first end cover 8 and the second end cover 9 are respectively fixed on both sides of the cooling outer pipe 4. The water inlet pipe 10 is fixed on the first end cover 8, and the drain pipe 11 is fixed on the second end cover 9. The first connecting pipe 12 is fixed between the first end cover 8 and the cooling inner pipe 5 and is connected to the water inlet pipe 10. The second connecting pipe 13 is fixed between the second end cover 9 and the cooling inner pipe 5 and is connected to the drain pipe 11. The water inlet holes 14 are annularly arranged on the first connecting pipe 12, and water is guided to the gap between the cooling inner pipe 5 and the cooling outer pipe 4 through the water inlet holes 14; the drain holes 15 are annularly arranged on the second connecting pipe 13, and the water in the gap between the cooling inner pipe 5 and the cooling outer pipe 4 is discharged through the drain holes 15.

[0035] When cooling the polyurethane adhesive film, the cold water pipe is externally connected to the water inlet pipe 10, and the cold water flows through the first connecting pipe 12 and the water inlet holes 14 to the gap between the cooling inner pipe 5 and the cooling outer pipe 4 and is distributed in the cooling flow channels 7. When the cooling flow channels 7 are filled with cold water, the valve covers at both ends of the water inlet pipe 10 and the drain pipe 11 are closed (the valve covers are detachably installed at both ends of the water inlet pipe 10 and the drain pipe 11 by means of threaded cooperation and are used to open or close the water inlet pipe 10 and the drain pipe 11).

[0036] The polyurethane adhesive film is wound around the cooling pipe for cooling. After a period of time, the cold water in the cooling pipe becomes warm water, then the valve cover on the drain pipe 11 is opened, and the warm water in the gap between the cooling inner pipe 5 and the cooling outer pipe 4 is discharged, and cold water can be re-introduced.

[0037] Both ends of the water inlet pipe 10 and the drain pipe 11 are installed on the first support frame 2 through the bearing seats 3. Bearings are arranged inside the bearing seats 3 to improve the rotation stability of the cooling pipe.

[0038] The driving mechanism is fixed on the top of the base plate 1 and is used to drive the cooling pipe to rotate. Thus, while pulling the polyurethane adhesive film, it plays a role in cooling the polyurethane adhesive film. The driving mechanism includes a driving motor 16, a driving wheel 17, a driven wheel 18, and a synchronous belt 19. The housing of the driving motor 16 is fixed on the base plate 1. The output shaft of the driving motor 16 is equipped with the driving wheel 17. The driven wheel 18 is sleeved on the water inlet pipe 10. The synchronous belt 19 is wound around the driving wheel 17 and the driven wheel 18. When the driving motor 16 drives the driving wheel 17 to rotate, it drives the driven wheel 18 to rotate through the synchronous belt 19, and then drives the cooling pipe to rotate.

[0039] The diameter of the driving wheel 17 is smaller than that of the driven wheel 18 to reduce the rotation speed of the cooling pipe, ensure that the polyurethane adhesive film has sufficient contact time with the cooling pipe, and improve the cooling efficiency of the polyurethane adhesive film.

[0040] The tensioning assembly tensions the cooled polyurethane adhesive film to prevent the polyurethane adhesive film from overlapping and bonding with each other during cooling and winding. The third support frame 24 is fixed on the top of the base plate 1 and is located on one side of the first support frame 2. There are two limiting plates 26, which are fixedly spaced on the top of the third support frame 24. The limiting groove 27 horizontally penetrates through the limiting plate 26 to support and limit the movement of the adjusting roller 29.

[0041] The adjusting shaft 28 penetrates through the limiting groove 27, and the diameter of the adjusting shaft 28 is equal to the height of the limiting groove 27. The adjusting roller 29 is rotatably sleeved on the adjusting shaft 28 through a bearing. The fourth support frame 25 is fixed on the base plate 1 and is located on one side of the third support frame 24. The cylinder body of the pushing cylinder 30 is fixed on the top of the fourth support frame 25. The guide rod of the pushing cylinder 30 is connected to the sleeve 31. The push rod 34 is arranged on one side of the sleeve 31 and is fixed to the adjusting shaft 28.

[0042] The limiting groove 27 can not only support the adjusting roller 29, but also support the sleeve 31 through the push rod 34. By setting the pushing cylinder 30 to change the position of the adjusting roller 29, the tensioning of the polyurethane adhesive film is completed.

[0043] As Figure 4 shown ( Figure 4The spring 32 therein is in a compressed state. Under normal circumstances, the abutting plate 33 abuts against the left side surface of the sleeve 31). The push rod 34 is arranged inside the sleeve 31, and the abutting plate 33 is fixed to the inner side of the push rod 34. The spring 32 abuts against the side of the abutting plate 33 away from the push rod 34. The pushing cylinder 30 pushes the sleeve 31 to move. The spring 32 inside the sleeve 31 abuts against the abutting plate 33, the push rod 34 and the adjusting shaft 28 to move, thereby changing the position of the adjusting roller 29, and finally completing the tensioning of the polyurethane adhesive film.

[0044] At this time, under the action of the internal spring 32, the abutting plate 33 and the push rod 34 are in a floating state. When the polyurethane adhesive film cools down, under the influence of thermal expansion and contraction, the polyurethane adhesive film will shrink after cooling. At this time, the deformation of the spring 32 is relied on to match and offset the shrinkage of the polyurethane adhesive film, avoiding the polyurethane adhesive film from being too tight and being pulled off.

[0045] The second support frame 20 is erected above the third support frame 24. The cylinder body of the pressing cylinder 21 is fixed on the second support frame 20. The pressing shaft 22 is connected to the piston rod of the pressing cylinder 21. The pressing roller 23 is rotatably sleeved on the pressing shaft 22 through a bearing. After the polyurethane adhesive film is wound into a cylinder by a winding machine, when it is wound to a specified thickness, the polyurethane adhesive film needs to be cut off. At this time, the polyurethane adhesive film wound around the adjusting roller 29 is likely to scatter.

[0046] Therefore, during cutting, the pressing cylinder 21 drives the pressing roller 23 to descend and abut against the adjusting roller 29, and the polyurethane adhesive film is squeezed by the pressing roller 23 and the adjusting roller 29 to prevent the polyurethane adhesive film from scattering.

[0047] The traction principle of the cooling and traction mechanism of the polyurethane adhesive film of the present utility model is as follows:

[0048] The polyurethane adhesive film bypasses the top of one of the cooling pipes and then exits from the bottom of the other cooling pipe, thereby completing the cooling of both sides of the polyurethane adhesive film; then the cooled polyurethane adhesive film is bypassed around the adjusting roller 29, and the tensioning work of the polyurethane adhesive film is completed through the pushing cylinder 30, avoiding the polyurethane adhesive film from overlapping and bonding with each other during cooling and winding.

[0049] The above embodiments are only used to illustrate the technical concept and characteristics of the present utility model, and their purpose is to enable those who are familiar with this technology to understand the content of the present utility model and implement it accordingly, and it cannot be used to limit the protection scope of the present utility model. All equivalent changes or modifications made according to the spirit and essence of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A cooling and traction mechanism for a polyurethane adhesive film, characterized in that, It includes: a substrate (1); a cooling assembly, the cooling assembly including at least two cooling tubes rotatably mounted on the top of the substrate (1) and a driving mechanism fixed on the substrate (1) and used to drive the cooling tubes to rotate, the rotation directions of the cooling tubes being opposite; the cooling assembly performs double-sided cooling on the polyurethane adhesive film.

2. The cooling and traction mechanism of a polyurethane adhesive film according to claim 1, characterized in that: The cooling tube includes a cooling outer tube (4) rotatably mounted on the top of the substrate (1), a cooling inner tube (5) coaxially fixed inside the cooling outer tube (4), a flow channel plate (6) spirally arranged on the outer peripheral surface of the cooling inner tube (5), and a cooling flow channel (7) formed in the flow channel plate (6).

3. The cooling and traction mechanism of a polyurethane adhesive film according to claim 2, characterized in that: The cooling tube further includes end caps fixed on both sides of the cooling outer tube (4), water pipes coaxially fixed on the opposite sides of the end caps, connecting pipes fixed between the cooling outer tube (4) and the cooling inner tube (5), and water holes annularly arranged on the connecting pipes.

4. The cooling and traction mechanism of a polyurethane adhesive film according to claim 1, characterized in that: It further includes a tensioning assembly fixed on the top of the substrate (1), the tensioning assembly including a sleeve (31) movably arranged on one side of the cooling tube, a push rod (34) elastically mounted on the side of the sleeve (31) close to the cooling tube, an adjusting roller (29) rotatably mounted between the push rods (34), and a pressing roller (23) arranged above the adjusting roller (29) in a liftable manner.

5. The cooling and traction mechanism of a polyurethane adhesive film according to claim 4, characterized in that: The tensioning assembly further includes a limiting plate (26) fixed on the top of the substrate (1), a limiting groove (27) penetrating through the limiting plate (26), and an adjusting shaft (28) fixed to the push rod (34) and penetrating through the limiting groove (27), the adjusting roller (29) being rotatably sleeved on the adjusting shaft (28).

6. The cooling and traction mechanism of a polyurethane adhesive film according to claim 4, characterized in that: The tensioning assembly further includes a resisting plate (33) arranged in the sleeve (31) and fixed to the push rod (34), and a spring (32) arranged in the sleeve (31), the spring (32) abutting against the side of the resisting plate (33) away from the push rod (34).

7. A cooling and traction mechanism for a polyurethane adhesive film according to claim 4, characterized in that: The tensioning assembly further includes a second support frame (20) fixed on the top of the substrate (1), a pressing cylinder (21) fixed on the second support frame (20), and a pressing shaft (22) connected to the pressing cylinder (21), the pressing roller (23) being rotatably sleeved on the pressing shaft (22).

8. The cooling and traction mechanism of a polyurethane adhesive film according to claim 3, characterized in that: The driving mechanism includes a driving motor (16) fixed on the top of the substrate (1), a driving wheel (17) connected to the driving motor (16), a driven wheel (18) sleeved on the connecting pipe, and a synchronous belt (19) wound around the driving wheel (17) and the driven wheel (18).

9. The cooling and traction mechanism of a polyurethane adhesive film according to claim 8, characterized in that: The diameter of the driving wheel (17) is smaller than the diameter of the driven wheel (18).

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