Processing equipment for TPU synthetic leather

Abstract

The invention relates to the technical field of synthetic leather processing, in particular to TPU synthetic leather processing equipment which comprises a rack, and a preheating unit, an embossing unit and a cooling unit are sequentially distributed on the rack from front to back; the cooling unit comprises a rotary drum rotationally installed on the rear side of the rack and an air pipe penetrating through the side wall of the rack and extending into an inner cavity of the rotary drum, the rotary drum is a net drum, air holes are distributed in the air pipe in the length direction, the outer diameter of the air pipe is smaller than the inner diameter of the rotary drum, and the outer wall of the rotary drum makes contact with synthetic leather during cooling. The rotating drum is driven by the moving synthetic leather to rotate; the air holes face the contact portion of the synthetic leather and the rotary drum, meanwhile, the air pipe is located in the inner cavity of the rotary drum and provided with an air flow guiding assembly, and the air flow guiding assembly is used for guiding air flow exhausted from the air holes, so that the air flow can make full contact with the synthetic leather, and the air cooling efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of synthetic leather processing, in particular to a processing device for TPU synthetic leather. Background Art

[0002] After the TPU synthetic leather is bonded and formed, it needs to be surface treated, such as embossing. Embossing of artificial leather is a key step in the production process. It not only affects the appearance quality of the product, but also affects the performance and service life of the product.

[0003] Artificial leather embossing usually adopts hot pressing technology. After hot pressing, the artificial leather is quickly cooled by a cooling and shaping device (such as a cold air machine) to fix the pattern and prevent deformation.

[0004] At present, the cooling methods adopted include air cooling and water cooling. Compared with the water cooling method, the equipment of the air cooling system is relatively simple, and the installation and maintenance costs are lower. However, in the current air cooling structure, a cooling roller is provided in contact with the surface of the synthetic leather, and the synthetic leather is cooled by the air flow through the cooling roller. Since the air flow is evenly distributed in the cooling roller, but only a part of the area of ​​the cooling roller is in contact with the synthetic leather, the efficiency of the air cooling is relatively low. Especially in a high temperature environment, the cooling effect may not be ideal.

[0005] This solution provides a TPU synthetic leather processing device, which improves the air cooling utilization efficiency by improving the existing cooling roller structure. Summary of the invention

[0006] 1. Technical issues

[0007] The present invention aims to at least solve the problem in the prior art that air cooling is limited by the structure of the existing cooling roller, resulting in low utilization rate of cold air.

[0008] (II) Technical content

[0009] This solution provides a TPU synthetic leather processing equipment, which is achieved by the following specific technical means: comprising a frame, wherein the frame is provided with a preheating unit, an embossing unit and a cooling unit in sequence from front to back;

[0010] The cooling unit comprises a rotating drum rotatably mounted on the rear side of the frame and an air pipe penetrating the side wall of the frame and extending into the inner cavity of the rotating drum. The rotating drum is a mesh drum, and air holes are distributed on the air pipe along the length direction. The outer diameter of the air pipe is smaller than the inner diameter of the rotating drum. During cooling, the outer wall of the rotating drum is in contact with the synthetic leather. Due to the rotating arrangement of the rotating drum, the rotating drum is driven to rotate by the moving synthetic leather.

[0011] The air holes are oriented toward the contact portion between the synthetic leather and the drum. An air flow guiding component is provided on the air pipe in the inner cavity of the drum. The air flow guiding component is used to guide the air flow discharged from the air holes so that the air flow can fully contact the synthetic leather, thereby improving the efficiency of air cooling.

[0012] Preferred technical solution one: the airflow guide component includes partition one and partition two fixed on the outer wall of the air pipe along the length direction, the air holes are distributed between partition one and partition two, the end of partition one is in contact with the inner wall of the rotating drum, and a gap is left between the end of partition two and the inner wall of the rotating drum, and a bent and extended guide plate is fixed at the end of partition two, and airflow channels that are interconnected are formed between partition one and partition two, and between the guide plate and the inner wall of the rotating drum, the airflow discharged from the air holes flows along the airflow channel, the contact surface between the rotating drum and the synthetic leather overlaps with the airflow channel, so that the airflow can fully realize heat exchange with the synthetic leather, and the airflow after heat exchange is discharged from the top of the airflow channel, and spreads to other areas in the rotating drum before being discharged.

[0013] Preferred technical solution 2: the partition 1 is located below the partition 2, and the outlet of the air flow channel is located above the air hole. This arrangement is based on the characteristics of cold air descending and hot air rising, so that the hot air after heat exchange can be discharged in time, while the cold air can be retained in the air flow channel;

[0014] On the other hand, the air flow channel outlet is located on the upper side and also faces the direction of the synthetic leather, so that the cold air first contacts the lower temperature part of the synthetic leather and then contacts the higher temperature part, which has a better cooling effect on the synthetic leather and also avoids the hot air from contacting the cooled synthetic leather.

[0015] Preferred technical solution three: the guide plate is an arc-shaped plate, and the corresponding center of the circle coincides with the center of the rotating drum.

[0016] Preferred technical solution 4: There are at least two groups of cooling units, and the synthetic leather passes around the multiple groups of cooling units in sequence, and the multiple groups of cooling units are used to cool the front and back sides of the synthetic leather.

[0017] Preferred technical solution five: An air supply device is provided on one side of the rack, and air is supplied through the air supply device connected to air pipes in multiple groups of cooling units.

[0018] Preferred technical solution six: A unwinding roller is provided on the frame at the front lower part near the front side of the preheating unit, and a fan guide device is fixed at the bottom of the frame between the unwinding roller and the cooling unit. The fan guide device is used to guide the hot air discharged from the cooling unit toward the unwinding roller, so as to preheat the synthetic leather wound on the unwinding roller at low temperature.

[0019] Preferred technical solution seven: the preheating unit consists of a heating channel formed on the frame and a heating element arranged in the heating channel.

[0020] (III) Technical Effect

[0021] The above structure enables this solution to have the following beneficial effects:

[0022] 1. By setting the rotating drum, air pipe and air flow guide components, the flow trajectory of the cold air is planned so that it can fully exchange heat with the synthetic leather and improve the utilization rate of the cold air;

[0023] 2. The flow trajectory of the cold air not only coincides with the contact surface between the synthetic leather and the drum, but also conforms to the flow direction characteristics of the cold and hot air flows through the structural setting of the air flow channel;

[0024] 3. Reuse the hot air after heat exchange to preheat the synthetic leather before heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 This is a schematic diagram of the overall structure of this scheme;

[0027] Figure 2 This is the rear view of this scheme;

[0028] Figure 3 This is a cross-sectional view of this scheme;

[0029] Figure 4 This is a schematic diagram of the structure of the frame of this scheme;

[0030] Figure 5 This is the exploded diagram of the cooling unit of this scheme;

[0031] Figure 6 It is a side view of the cooling unit of this scheme;

[0032] Figure 7 This is a schematic diagram of the structure of the fan device of this scheme.

[0033] Among them, 1. frame, 2. preheating unit, 21. heating channel, 22. heating element, 3. embossing unit, 31. embossing roller, 32. supporting roller, 33. gear, 4. cooling unit, 41. rotating drum, 42. air pipe, 421. air hole, 43. air flow guide assembly, 431. partition one, 432. partition two, 433. guide plate, 434. air flow channel, 44. air supply device, 5. unwinding roller, 6. fan guide device, 7. control device, 8. clamping and conveying roller group. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-Figure 6 , a processing device for TPU synthetic leather, comprising a frame 1, wherein the frame 1 is provided with a preheating unit 2, an embossing unit 3 and a cooling unit 4 in sequence from front to back, wherein the cooling unit 4 comprises a rotating drum 41 rotatably mounted on the rear side of the frame 1 and an air pipe 42 penetrating the side wall of the frame 1 and extending into the inner cavity of the rotating drum 41, wherein the rotating drum 41 is a mesh drum, and air holes 421 are distributed on the air pipe 42 along the length direction, wherein the outer diameter of the air pipe 42 is smaller than the inner diameter of the rotating drum 41, and the outer wall of the rotating drum 41 is used to contact with the synthetic leather during cooling, and the rotating drum 41 is driven to rotate by the moving synthetic leather due to the rotating arrangement of the rotating drum 41;

[0036] The air hole 421 faces the part where the synthetic leather contacts the drum 41, and an air flow guide component 43 is provided on the air pipe 42 in the inner cavity of the drum 41. The air flow guide component 43 is used to guide the air flow discharged from the air hole 421 so that the air flow can fully contact the synthetic leather and improve the efficiency of air cooling; the air flow guide component 43 includes a partition 1 431 and a partition 2 432 fixed along the length direction on the outer wall of the air pipe 42, and the air holes 421 are distributed between the partition 1 431 and the partition 2 432. The end of the partition 1 431 located on the lower side contacts the inner wall of the drum 41, and the end of the partition 2 432 located on the upper side contacts the inner wall of the drum 41. There is a gap between the two partitions 432, and a guide plate 433 that bends and extends upward is fixed at the end of the partition 2 432. The guide plate 433 is an arc-shaped plate, and the corresponding circle center coincides with the circle center of the rotating drum 41. The partition 1 431 and the partition 2 432, and the guide plate 433 and the inner wall of the rotating drum 41 form an air flow channel 434 that is interconnected. The airflow discharged from the air hole 421 flows along the air flow channel 434. The contact surface between the rotating drum 41 and the synthetic leather overlaps with the air flow channel 434, so that the airflow can fully achieve heat exchange with the synthetic leather. The airflow after heat exchange is discharged from the top of the air flow channel 434, and spreads to other areas in the rotating drum 41 before being discharged.

[0037] Since the outlet of the airflow channel 434 is located above the air hole 421, such a setting is based on the characteristics that cold air descends and hot air rises, so that the hot air after heat exchange can be discharged in time, while the cold air can be retained in the airflow channel 434;

[0038] On the other hand, the outlet of the airflow channel 434 is located at the upper side and also faces the direction of the synthetic leather, so that the cold air first contacts the lower temperature part of the synthetic leather and then contacts the higher temperature part, so that the cooling effect of the synthetic leather is better, and at the same time, the heated air is prevented from contacting the cooled synthetic leather;

[0039] There are at least two groups of cooling units 4, and the synthetic leather bypasses multiple groups of cooling units 4 in sequence. The multiple groups of cooling units 4 are used to cool the front and back sides of the synthetic leather. An air supply device 44 is provided on one side of the frame 1, and the air supply device 44 is connected to the air pipes 42 in the multiple groups of cooling units 4 for air supply.

[0040] See also Figure 3 and Figure 7 , TPU synthetic leather processing equipment, a unwinding roller 5 is provided on the frame 1 at the front lower part near the front side of the preheating unit 2, and a fan guide device 6 is fixed at the bottom of the frame 1 between the unwinding roller 5 and the cooling unit 4, the fan guide device 6 is used for guiding the hot air discharged from the cooling unit 4 to the direction of the unwinding roller 5, so as to preheat the synthetic leather wound on the unwinding roller 5 at a low temperature.

[0041] See also Figure 3 , TPU synthetic leather processing equipment, the preheating unit 2 is composed of a heating channel 21 formed on a frame 1 and a heating element 22 arranged in the heating channel 21.

[0042] See also Figure 1 and Figure 7 , TPU synthetic leather processing equipment, the embossing unit 3 includes an embossing roller 31 and a supporting roller 32 which are rotatably arranged in the middle of the frame 1, and the embossing roller 31 and the supporting roller 32 are engaged with each other through a gear 33 fixed at the end to realize the same speed rotation of the roller surface.

[0043] See also Figure 2 , TPU synthetic leather processing equipment, the rear side of the frame 1 is located at the tail end of the multiple cooling units 4, and a clamping and conveying roller group 8 rotates. The roller surface speed of the clamping and conveying roller group 8 is consistent with the roller surface speed of the embossing roller 31, and is used to clamp and convey the cooled synthetic leather, so that the synthetic leather can be tightly attached to the cylinder surface of the rotating drum 41 under tension.

[0044] See also Figure 1-Figure 2 , TPU synthetic leather processing equipment, a control device 7 is arranged on the frame 1, and the control device 7 is used to control the rotation of the embossing roller 31, the rotation of the clamping conveying roller group 8, the start of the fan guide device 6, the start of the air supply device 44 and the start of the heating element 22.

[0045] 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 processing equipment for TPU synthetic leather, characterized in that: The machine comprises a frame (1), wherein the frame (1) is provided with a preheating unit (2), an embossing unit (3) and a cooling unit (4) in sequence from front to back; The cooling unit (4) comprises a rotating drum (41) rotatably mounted on the rear side of the frame (1) and an air pipe (42) penetrating the side wall of the frame (1) and extending into the inner cavity of the rotating drum (41); the rotating drum (41) is a mesh cylinder, and air holes (421) are distributed on the air pipe (42) along the length direction; the outer diameter of the air pipe (42) is smaller than the inner diameter of the rotating drum (41), and the outer wall of the rotating drum (41) is in contact with the synthetic leather; The air hole (421) faces the part where the synthetic leather contacts the rotating drum (41), and an air flow guiding component (43) is provided on the air pipe (42) in the inner cavity of the rotating drum (41). The air flow guiding component (43) is used to guide the air flow discharged from the air hole (421) so that the air flow can fully contact the synthetic leather.

2. The TPU synthetic leather processing equipment according to claim 1, characterized in that: The airflow guide assembly (43) includes a partition plate 1 (431) and a partition plate 2 (432) fixed on the outer wall of the air pipe (42) along the length direction, and the air holes (421) are distributed between the partition plate 1 (431) and the partition plate 2 (432). The end of the partition plate 1 (431) contacts the inner wall of the rotating drum (41), and a gap is left between the end of the partition plate 2 (432) and the inner wall of the rotating drum (41). A bent and extended guide plate (33) is fixed at the end of the partition plate 2 (432). An airflow channel (434) that is interconnected is formed between the partition plate 1 (431) and the partition plate 2 (432), and between the guide plate (33) and the inner wall of the rotating drum (41).

3. The TPU synthetic leather processing equipment according to claim 2, characterized in that: The partition plate 1 (431) is located below the partition plate 2 (432), and the outlet of the air flow channel (434) is located above the air hole (421).

4. The TPU synthetic leather processing equipment according to claim 1, characterized in that: The guide plate (33) is an arc-shaped plate (433), and the corresponding center of the circle coincides with the center of the circle of the rotating drum (41).

5. The TPU synthetic leather processing equipment according to claim 1, characterized in that: The cooling units (4) have at least two groups, and the synthetic leather passes around the multiple groups of cooling units (4) in sequence, so that the front and back sides of the synthetic leather are cooled by using the multiple groups of cooling units (4).

6. The TPU synthetic leather processing equipment according to claim 5, characterized in that: An air supply device (44) is provided on one side of the frame (1), and is connected to air pipes (42) in a plurality of cooling units (4) via the air supply device (44).

7. The TPU synthetic leather processing equipment according to claim 5, characterized in that: A reel (5) is provided on the frame (1) at the lower front position close to the front side of the preheating unit (2), and a fan guide device (6) is fixed at the bottom of the frame (1) between the reel (5) and the cooling unit (4), the fan guide device (6) being used to guide the hot air discharged from the cooling unit (4) in the direction of the reel (5).

8. The TPU synthetic leather processing equipment according to claim 7, characterized in that: The heating temperature of the preheating unit (2) is higher than the preheating temperature at the unwinding roller (5).

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