A hot melt film laminating and pressing device for synthetic leather

Abstract

The application provides a hot melt film composite synthetic leather ironing and pressing equipment, and belongs to the technical field of synthetic leather processing. The technical problem of uneven ironing and pressing, poor product effect, low efficiency and the like of the existing composite synthetic leather is solved. The equipment comprises two feeding and preheating mechanisms and discharging and cooling mechanisms arranged side by side, the feeding and preheating mechanism and the discharging and cooling mechanism are communicated, a plurality of winding and feeding mechanisms are arranged at the front of the feeding and preheating mechanism, a tensioning roller assembly is arranged at the front side of the feeding and preheating mechanism, one winding and feeding mechanism is arranged at the front of the discharging and cooling mechanism, the rear sides of the feeding and preheating mechanism and the discharging and cooling mechanism are provided with an ironing and pressing mechanism, the feeding and preheating mechanism and the ironing and pressing mechanism are communicated, the ironing and pressing mechanism comprises an ironing and pressing main roller assembly and a plurality of adjusting ironing and pressing roller assemblies arranged on the two sides of the ironing and pressing main roller assembly. The application can realize rapid winding and unwinding, has raw material preheating function and product cooling function, can realize progressive ironing and pressing, and has good ironing and pressing effect and high efficiency.

Description

Technical Field

[0001] This invention belongs to the field of synthetic leather processing technology, and relates to a synthetic leather hot pressing device, particularly a hot pressing device for hot melt film composite synthetic leather. Background Technology

[0002] Hot melt film is a type of film product commonly used for bonding various fabrics, paper, and polymer materials. Synthetic leather has a similar structure to natural leather and is a plastic product that can be used as a substitute. Both sides are very similar to leather and have a certain degree of breathability. By heating the hot melt film to melt the adhesive layer and create stickiness, and then cooling and solidifying it, synthetic leather and mesh fabric can be firmly bonded together to form a composite material.

[0003] Bonding with hot melt film usually requires the use of heat pressing tools, and existing heat pressing tools are usually flat heat pressing tools used for prototyping and testing in factories or for bonding sheet materials.

[0004] On the one hand, after pressing, the surface of synthetic leather still has a certain temperature and needs to be cooled naturally before the next process can be carried out. The temperature cannot be dissipated quickly and the cooling is slow. On the other hand, most of the existing pressing tools are flat, and the top plate is lowered by hydraulic control. The top plate descends and contacts the bottom plate for pressing. Workers are prone to injuring their fingers due to negligence when operating, and the efficiency is low.

[0005] A search revealed a Chinese patent document disclosing a hot-pressing lamination device for TPU hot-melt film and synthetic leather [Application No.: 201320300497.X; Publication No.: CN203305624U]. This device includes a TPU hot-melt film roller, a textureless ironing roller, a synthetic leather roller, a high-temperature lamination roller, a cooling roller, a composite synthetic leather roller, and several guide rollers. The TPU hot-melt film roller is fitted with TPU hot-melt film, and the synthetic leather roller is fitted with synthetic leather. A gap is provided between the textureless ironing roller and the high-temperature lamination roller, and the size of this gap is adjustable to accommodate composite synthetic leather of different thicknesses. A cooling roller and a composite synthetic leather roller are sequentially arranged after the textureless ironing roller and the high-temperature lamination roller. The TPU hot melt film is bonded to the mesh fabric and then subjected to high-temperature hot pressing between the textureless ironing roller and the high-temperature composite roller. After being cooled by the cooling roller, it is finally wound up on the composite synthetic leather roller. Several guide rollers are also set along the path of the TPU hot melt film and synthetic leather to provide tension and guidance. Although it can perform hot pressing and lamination of hot melt film and synthetic leather, both the hot melt film and synthetic leather are placed horizontally. However, the hot pressing is only formed in one step, resulting in poor hot pressing effect. Furthermore, it lacks preheating and cooling devices, leading to low product efficiency.

[0006] Based on this, we propose a hot-melt film composite synthetic leather hot-pressing equipment that can quickly unwind, rewind, and unwind, has raw material preheating and finished product cooling functions, and can perform progressive hot-pressing and pressing, with good hot-pressing and pressing effect and high efficiency. Summary of the Invention

[0007] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a hot-melt film composite synthetic leather hot-pressing device. The technical problem to be solved by this invention is: how to achieve progressive hot-pressing and forming a production line hot-pressing process of raw material unwinding, raw material preheating, progressive hot-pressing, finished product cooling, and finished product winding.

[0008] The objective of this invention can be achieved through the following technical solutions:

[0009] A hot-melt film composite synthetic leather hot-pressing device includes two feeding preheating mechanisms and a discharge cooling mechanism placed side by side. The feeding preheating mechanism and the discharge cooling mechanism are connected. Several winding and unwinding mechanisms are placed at the front of the feeding preheating mechanism. A tension roller assembly is provided at the front side of the feeding preheating mechanism. A winding and unwinding mechanism is placed at the front of the discharge cooling mechanism. A hot-pressing mechanism is provided at the rear side of the feeding preheating mechanism and the discharge cooling mechanism. The feeding preheating mechanism and the hot-pressing mechanism are connected. The hot-pressing mechanism includes a hot-pressing main roller assembly and several adjusting hot-pressing roller assemblies arranged on both sides of the hot-pressing main roller assembly.

[0010] The working principle of this invention is as follows: A synthetic leather roll is placed on the first and third winding and unwinding mechanisms at the front of the feeding preheating mechanism. A hot melt film is placed on the second winding and unwinding mechanism at the front of the roll feeding preheating mechanism. The hot melt film is positioned between two layers of synthetic leather. Unwinding is performed, and the film is fed into the feeding preheating mechanism along the tension roller assembly. Based on the thickness requirements of the composite synthetic leather, the distance between the pressing roller assembly and the pressing main roller assembly is adjusted, decreasing sequentially from inlet to outlet, for progressive pressing. Simultaneously, the pressing temperature of the pressing roller assembly and the pressing main roller assembly is adjusted. The feeding preheating mechanism and the pressing mechanism are connected, drawing heat from the pressing mechanism into the feeding preheating mechanism. Some hot air is exhausted to the outside to prevent dust from entering the feeding preheating mechanism. The hot melt film layer and the two layers of synthetic leather are preheated. The composite synthetic leather enters the hot pressing mechanism. After hot pressing, the hot melt film melts and bonds the synthetic leather to the synthetic leather to form a composite synthetic leather. The composite synthetic leather enters the discharge cooling mechanism. After the hot air enters the feeding preheating mechanism, part of it becomes cool air. The feeding preheating mechanism and the discharge cooling mechanism are connected. The cool air then enters the discharge cooling mechanism to form low-temperature cold air. The cold air cools the hot-pressed composite synthetic leather. Then, it is wound up by the winding and unwinding mechanism placed at the front of the discharge cooling mechanism to form a composite synthetic leather roll. The winding and unwinding mechanism can be flipped to facilitate loading and unloading.

[0011] The winding and unwinding mechanism includes a base, with a first stop, a hinged seat and a second stop fixed sequentially on the upper end of the base. An L-shaped tilting frame is hinged to the upper end of the hinged seat. Two tilting hydraulic cylinders are hinged between the L-shaped tilting frame and the base. A discharge V-shaped groove is provided on one side of the L-shaped tilting frame, and a winding assembly is provided on the other side of the L-shaped tilting frame.

[0012] Using the above structure, two tilting hydraulic cylinders drive the L-shaped tilting frame to rotate at the hinge seat, allowing for tilting. During take-up and take-up, the two tilting hydraulic cylinders drive the L-shaped tilting frame to tilt, and the L-shaped tilting frame abuts against the first stop. At this time, the discharge V-groove is placed horizontally, and the synthetic leather roll and hot melt film roll are inserted and placed in the roll assembly. The roll assembly opens and clamps the synthetic leather roll and hot melt film roll. When taking up the composite synthetic leather roll, the roll assembly retracts, releases the composite synthetic leather roll, and removes the composite synthetic leather roll. During unwinding, the two tilting hydraulic cylinders drive the L-shaped tilting frame to tilt, and the L-shaped tilting frame abuts against the second stop. The roll assembly rotates to unwind or rewind.

[0013] The coil assembly includes a fixed base and a power motor. The fixed base is rotatably positioned below the other side of the L-shaped tilting frame, and the power motor is fixed below the other side of the L-shaped tilting frame. A transmission sprocket pair is provided between the output shaft of the power motor and the fixed base. The coil motor is fixed at the lower end of the fixed base, and the output shaft of the coil motor passes through the fixed base and the other side of the L-shaped tilting frame. Several fixed discs are fixed at the upper end of the fixed base, and rotating screws are rotatably provided inside the fixed discs. The rotating screws are fixedly connected to the upper end of the output shaft of the coil motor, and several helical seats are drivenly connected to the rotating screws. Several circumferentially distributed guide rods are fixed on the fixed discs, and guide seats are slidably provided on each guide rod. A hinged connecting rod is hinged between the guide seat and the helical seat above it. A connecting rod is fixed on each guide seat, and a coil arc plate is fixed on the connecting rod in the same vertical row. A tension rubber layer is provided on the outer surface of the coil arc plate.

[0014] With the above structure, the output shaft of the roll motor drives the rotating screw to rotate. The rotating screw is driven by the screw seat, causing the screw seat to rise and fall. When the screw seat rises, it pulls the hinged connecting rod, which in turn pulls the guide seat along the guide rod towards the rotating screw. This pulls the connecting rod inward, which in turn moves the roll arc plate inward synchronously. Several circumferentially distributed roll arc plates come together, and the tension rubber layer moves away from the roll shaft of the synthetic leather roll and the hot melt film roll, facilitating winding and unwinding. During unwinding, the output shaft of the roll motor drives the rotating screw to reverse. The rotating screw is driven by the screw seat, causing the screw seat to fall. Several circumferentially distributed roll arc plates unfold outward, and the tension rubber layer comes into contact with the roll shaft of the synthetic leather roll and the hot melt film roll. The output shaft of the power motor drives the fixed seat to rotate through the transmission sprocket pair, which in turn drives the roll arc plate to rotate, thus unwinding the synthetic leather roll and the hot melt film roll and rewinding the composite synthetic leather roll.

[0015] The feeding preheating mechanism includes a preheating box, a lower cooling box fixed to the bottom of the preheating box, an induced draft fan fixed to the side of the preheating box, an air outlet pipe connected to the air outlet end of the induced draft fan, a distribution pipe at the upper end of the preheating box, the distribution pipe being connected to the air outlet pipe, material passage holes at both ends of the preheating box located in the lower cooling box, a heat-conducting air pipe connected to the air inlet end of the induced draft fan, and an exhaust fan inside the lower cooling box.

[0016] With the above structure, synthetic leather and hot melt film enter vertically from the material passage on one side and exit from the material passage on the other side. The air inlet of the blower draws the heat from the hot pressing mechanism into the heat-conducting air pipe, and blows it into the preheating box through the air outlet pipe and the air distribution pipe to better preheat the synthetic leather and hot melt film, ensuring the hot pressing effect. Part of the air is drawn into the lower cooling box by the exhaust fan for cooling, and the cool air is introduced into the material discharge cooling mechanism for cooling. Part of the air is discharged from the material passage to prevent dust from entering the preheating box.

[0017] The tension roller assembly includes two mounting plates, which are respectively fixed to the top of the preheating box and the top of the lower cooling box. A tension roller is rotatably mounted between the two mounting plates. A tension motor is fixed on the upper mounting plate. The output shaft of the tension motor is connected to the tension roller. The tension roller is located inside the feed through hole at the feed end.

[0018] With the above structure, the output shaft of the tensioning motor drives the tensioning roller to rotate, which is used to block the synthetic leather and hot melt film, so that the synthetic leather and hot melt film can enter the preheating box more stably.

[0019] The discharge cooling mechanism includes a cooling box, inside which is a mesh partition and a cold air box. The mesh partition is fixed to the upper end of the cold air box, and a cold air duct assembly is fixed inside the cold air box. The air inlet of the cold air duct assembly is connected to the air outlet of the exhaust fan, and the air outlet of the cold air duct assembly is located below the mesh partition. Discharge through holes are provided at both ends of the cooling box, and the discharge through holes are located above the mesh partition.

[0020] With the above structure, the hot-pressed composite synthetic leather enters from the discharge hole at one end and exits from the discharge hole at the other end. The exhaust fan draws cool air into the cold air duct assembly, and the cold air box cools the cold air duct assembly to obtain cold air, which is discharged from the mesh partition into the cooling chamber to cool the hot-pressed composite synthetic leather. The cold air is discharged from the discharge holes at both ends of the cooling chamber to prevent dust from entering the cooling chamber.

[0021] The hot pressing mechanism also includes a base, with a heat insulation cover fixed to the upper end of the base. The heat insulation cover is connected to a heat-conducting air duct. The end of the heat insulation cover is provided with an inlet and outlet, which are directly opposite the material feeding hole and the material discharge hole. Heat-insulated observation windows are provided on both sides of the heat insulation cover. A storage box is fixed to the upper end of the base. The hot pressing main roller assembly includes a main roller motor and a fixed support. The main roller motor is fixed inside the storage box, and the fixed support is fixed to the upper end of the base. The fixed support is C-shaped, and a main roller bearing seat is fixed to the end of the fixed support. A hot pressing main roller is rotatably mounted between the two main roller bearing seats. The hot pressing main roller is an electromagnetic heating roller. The output shaft of the main roller motor is connected to the lower end of the hot pressing main roller. The hot pressing main roller extends out of the inlet and outlet.

[0022] Using the above structure, the main pressing roller is an electromagnetic heating roller connected to an external power source to control the pressing temperature. The preheated synthetic leather and hot melt film enter the heat insulation cover from the inlet and outlet, and then enter the space between the main pressing roller and the adjusting pressing roller assembly. The output shaft of the main roller motor drives the main pressing roller to rotate, gradually pressing and bonding the preheated synthetic leather and hot melt film. The hot melt film melts, bonding the synthetic leather to the synthetic material to form composite synthetic leather. The pressed composite synthetic leather is discharged from the inlet and outlet and enters the discharge cooling mechanism.

[0023] The adjustable heat-pressing roller assembly includes a fixed frame, which is C-shaped and fixed above the base. Two adjusting motors are fixed on the fixed frame. Lead screws are rotatably provided at both the upper and lower ends of the inner side of the fixed frame. The lead screws are connected to the output shafts of the adjusting motors at the same height. Slide rails are fixed at both the upper and lower ends of the inner side of the fixed frame. Sliding seats are slidably provided on the slide rails. The sliding seats are connected to the lead screws at the same height. Adjustable roller bearing seats are fixed inside the sliding seats. An adjustable heat-pressing roller is provided between the two adjustable roller bearing seats. The adjustable heat-pressing roller is an electromagnetic heating roller.

[0024] Using the above structure, based on the thickness requirements of the composite synthetic leather, the output shaft of the adjusting motor drives the lead screw to rotate. The sliding seat cooperates with the lead screw of the same height, causing the sliding seat to slide on the slide rail of the same height, thereby adjusting the distance between the pressing roller and the main pressing roller. From the inlet to the outlet, the distance between the pressing roller and the main pressing roller decreases sequentially, performing progressive pressing. The pressing roller is adjusted to be an electromagnetic heating roller, connected to an external power source, controlling the pressing temperature of the pressing roller. The pressing roller cooperates with the main pressing roller, simultaneously pressing the synthetic leather and hot melt film from both sides.

[0025] Compared with existing technologies, this hot melt film composite synthetic leather pressing equipment has the following advantages:

[0026] Vertical winding and unwinding can be carried out through the winding and unwinding mechanism. Vertical unwinding is achieved by cooperating with several winding and unwinding mechanisms and tension roller assembly. The operation is simple and practical.

[0027] By combining the feeding preheating mechanism with the heat-conducting air duct and the hot pressing mechanism, heat can be reused to better and more uniformly preheat synthetic leather and hot melt film, ensuring the hot pressing effect. At the same time, it can exhaust air to prevent dust from entering the preheating box.

[0028] By combining the material discharge cooling mechanism with the material feeding preheating mechanism, the composite synthetic leather after hot pressing is cooled evenly with cold air, which facilitates rapid winding and unwinding by the winding and unwinding mechanism. At the same time, it can exhaust air to prevent dust from entering the cooling chamber.

[0029] The hot pressing mechanism works in conjunction with a hot pressing main roller assembly and several adjusting hot pressing roller assemblies to adjust the distance between the adjusting hot pressing roller and the hot pressing main roller. From the inlet to the outlet, the distance between the adjusting hot pressing roller and the hot pressing main roller decreases sequentially, resulting in progressive hot pressing and bonding. This method achieves good hot pressing and bonding effect and high efficiency. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0031] Figure 2 This is a front view structural schematic diagram of the winding and unwinding mechanism in this invention.

[0032] Figure 3 This is a three-dimensional structural diagram of the winding and unwinding mechanism in this invention.

[0033] Figure 4 This is a three-dimensional structural diagram of the roll assembly in this invention.

[0034] Figure 5 This is a three-dimensional structural diagram of the feeding and preheating mechanism in this invention.

[0035] Figure 6 This is a three-dimensional structural diagram of the tension roller assembly in this invention.

[0036] Figure 7 This is a three-dimensional structural diagram of the discharge cooling mechanism in this invention.

[0037] Figure 8 This is a three-dimensional structural diagram of the hot pressing mechanism in this invention.

[0038] Figure 9 This is a three-dimensional structural diagram of the heat-pressing mechanism in this invention when removing the heat insulation cover.

[0039] Figure 10 This is a three-dimensional structural diagram of the adjusting heat-pressing roller assembly in this invention.

[0040] In the diagram: 1. Rewinding and unwinding mechanism; 2. Feeding and preheating mechanism; 3. Heat-conducting air duct; 4. Pressing mechanism; 5. Discharge and cooling mechanism; 6. Base; 7. First stop; 8. L-shaped tilting frame; 9. Discharge V-groove; 10. Roll assembly; 11. Second stop; 12. Tilting hydraulic cylinder; 13. Roll motor; 14. Fixed seat; 15. Fixed plate; 16. Hinge connecting rod; 17. Screw seat; 18. Rotating screw; 19. Guide rod; 20. Guide seat; 21. Roll arc plate; 22. Preheating box; 23. Exhaust fan; 24. Air outlet duct; 25. Distributor duct; 26. Tensioner. 27. Roller assembly; 28. Lower cooling box; 29. ​​Mounting plate; 30. Tensioning motor; 31. Tensioning roller; 32. Cooling box; 33. Mesh partition; 34. Cold air duct assembly; 35. Cold air box; 36. Base; 37. Heat insulation cover; 38. Heat insulation observation window; 39. Main pressing roller; 40. Adjustable pressing roller assembly; 41. Inlet / outlet; 42. Storage box; 43. Main roller motor; 44. Fixed support; 45. Main roller bearing seat; 46. Sliding seat; 47. Adjustable roller bearing seat; 48. Lead screw; 49. Adjustable pressing roller; 50. Fixed frame; 51. Positioning motor; 52. Slide rail. Detailed Implementation

[0041] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0042] like Figures 1-10 As shown, the hot-melt film composite synthetic leather hot-pressing equipment includes two feeding preheating mechanisms 2 and a discharge cooling mechanism 5 placed side by side. The feeding preheating mechanism 2 and the discharge cooling mechanism 5 are connected. Several winding and unwinding mechanisms 1 are placed at the front of the feeding preheating mechanism 2. A tensioning roller assembly 26 is provided at the front of the feeding preheating mechanism 2. A winding and unwinding mechanism 1 is placed at the front of the discharge cooling mechanism 5. A hot-pressing mechanism 4 is provided at the rear of the feeding preheating mechanism 2 and the discharge cooling mechanism 5. The feeding preheating mechanism 2 and the hot-pressing mechanism 4 are connected. The hot-pressing mechanism 4 includes a hot-pressing main roller assembly and several adjusting hot-pressing roller assemblies 39 arranged on both sides of the hot-pressing main roller assembly.

[0043] The synthetic leather roll is placed on the first and third winding and unwinding mechanisms 1 at the front of the feeding preheating mechanism 2. The hot melt film is placed on the second winding and unwinding mechanism 1 at the front of the roll feeding preheating mechanism 2. The hot melt film is located between the two layers of synthetic leather. Unwinding is performed, and the film is fed into the feeding preheating mechanism 2 along the tension roller assembly 26. According to the thickness requirements of the composite synthetic leather, the distance between the pressing roller assembly 39 and the pressing main roller assembly is adjusted, decreasing from the inlet to the outlet, to perform progressive pressing. At the same time, the pressing temperature of the pressing roller assembly 39 and the pressing main roller assembly is adjusted. The feeding preheating mechanism 2 and the pressing mechanism 4 are connected, and the heat from the pressing mechanism 4 is drawn into the feeding preheating mechanism 2. Hot air is exhausted to the outside to prevent dust from entering the feeding preheating mechanism 2. The hot melt film layer and the two layers of synthetic leather are preheated. The composite synthetic leather enters the hot pressing mechanism 4. After hot pressing, the hot melt film melts and bonds the synthetic leather to the synthetic leather to form a composite synthetic leather. The composite synthetic leather enters the discharge cooling mechanism 5. After the hot air enters the feeding preheating mechanism 2, part of it becomes cool air. The feeding preheating mechanism 2 and the discharge cooling mechanism 5 are connected. The cool air then enters the discharge cooling mechanism 5 to form a low-temperature cold air. The cold air cools the hot-pressed composite synthetic leather. Then, it is wound up by the winding and unwinding mechanism 1 placed at the front of the discharge cooling mechanism 5 to form a composite synthetic leather roll. The winding and unwinding mechanism 1 can be flipped to facilitate winding and unwinding.

[0044] The winding and unwinding mechanism 1 includes a base 6. A first stop 7, a hinged seat, and a second stop 11 are fixed sequentially on the upper end of the base 6. An L-shaped flipping frame 8 is hinged to the upper end of the hinged seat. Two flipping hydraulic cylinders 12 are hinged between the L-shaped flipping frame 8 and the base 6. A discharge V-shaped groove 9 is provided on one side of the L-shaped flipping frame 8, and a winding assembly 10 is provided on the other side of the L-shaped flipping frame 8.

[0045] Two tilting hydraulic cylinders 12 drive the L-shaped tilting frame 8 to rotate at the hinge seat, which can be tilted 90 degrees. When taking off and rolling up, the two tilting hydraulic cylinders 12 drive the L-shaped tilting frame 8 to tilt. The L-shaped tilting frame 8 abuts against the first stop 7. At this time, the discharge V-shaped groove 9 is placed horizontally. The synthetic leather roll and the hot melt film roll are inserted and placed in the roll assembly 10. The roll assembly 10 opens and clamps the synthetic leather roll and the hot melt film roll. When taking off the composite synthetic leather roll, the roll assembly 10 retracts, releases the composite synthetic leather roll, and takes off the composite synthetic leather roll. When unwinding, the two tilting hydraulic cylinders 12 drive the L-shaped tilting frame 8 to tilt. The L-shaped tilting frame 8 abuts against the second stop 11. The roll assembly 10 rotates to unwind or rewind.

[0046] The coil assembly 10 includes a fixed base 14 and a power motor. The fixed base 14 is rotatably disposed below the other side of the L-shaped tilting frame 8. The power motor is fixed below the other side of the L-shaped tilting frame 8. A transmission sprocket pair is provided between the output shaft of the power motor and the fixed base 14. The lower end of the fixed base 14 is fixed with a coil motor 13. The output shaft of the coil motor 13 passes through the fixed base 14 and the other side of the L-shaped tilting frame 8. The upper end of the fixed base 14 is fixed with several fixed discs 15. The internal rotating mechanism of the several fixed discs 15 is... There is a rotating screw 18, which is fixedly connected to the upper end of the output shaft of the coil motor 13. Several screw seats 17 are drivenly connected to the rotating screw 18. Several guide rods 19 are evenly distributed in a circle on the fixed plate 15. Guide seats 20 are slidably provided on each guide rod 19. A hinged connecting rod 16 is hinged between the guide seat 20 and the screw seat 17 above it. A connecting rod is fixed on each guide seat 20. A coil arc plate 21 is fixed on the connecting rod in the same vertical row. The outer surface of the coil arc plate 21 is provided with a tension rubber layer.

[0047] The output shaft of the roll motor 13 drives the rotating screw 18 to rotate. The rotating screw 18 is in transmission cooperation with the screw seat 17, which drives the screw seat 17 to rise and fall. When the screw seat 17 rises, it pulls the hinged connecting rod 16. The hinged connecting rod 16 moves along the guide seat 20 and the guide rod 19 towards the rotating screw 18, thereby pulling the connecting rod inward. This causes the roll arc plate 21 to move inward synchronously. Several circumferentially distributed roll arc plates 21 come together, tensioning the rubber layer away from the synthetic leather roll and the hot melt film. The roll is designed for easy loading and unloading. During unwinding, the output shaft of the roll motor 13 drives the rotating screw 18 to reverse. The rotating screw 18 is driven by the screw seat 17, causing the screw seat 17 to descend. Several circumferentially distributed arc-shaped roll plates 21 unfold outward, and the tension rubber layer contacts the roll of synthetic leather and hot melt film. The output shaft of the power motor drives the fixed seat 14 to rotate through the transmission sprocket pair, thereby driving the arc-shaped roll plates 21 to rotate, thus unwinding the synthetic leather and hot melt film rolls and rewinding the composite synthetic leather rolls.

[0048] The feeding preheating mechanism 2 includes a preheating box 22, a lower cooling box 27 fixed to the bottom of the preheating box 22, an induced draft fan 23 fixed to the side of the preheating box 22, an air outlet pipe 24 connected to the air outlet end of the induced draft fan 23, a distribution pipe 25 provided at the upper end of the preheating box 22, the distribution pipe 25 being connected to the air outlet pipe 24, material passage holes provided at both ends of the preheating box 22, the material passage holes being located in the lower cooling box 27, a heat-conducting air pipe 3 connected to the air inlet end of the induced draft fan 23, and an exhaust fan provided inside the lower cooling box 27.

[0049] Synthetic leather and hot melt film enter vertically through the material passage on one side and exit through the material passage on the other side. The air inlet of the blower 23 draws the heat from the hot pressing mechanism 4 into the heat-conducting air pipe 3, and blows it into the preheating box 22 through the air outlet pipe 24 and the air distribution pipe 25 to better preheat the synthetic leather and hot melt film and ensure the hot pressing effect. Some of the air is drawn into the lower cooling box 27 by the exhaust fan for cooling and cool air is introduced into the material discharge cooling mechanism 5 for cooling. Some of the air is discharged through the material passage to prevent dust from entering the preheating box 22.

[0050] The tension roller assembly 26 includes two mounting plates 28, which are respectively fixed to the top of the preheating box 22 and the top of the lower cooling box 27. A tension roller 30 is rotatably mounted between the two mounting plates 28. A tension motor 29 is fixed on the upper mounting plate 28. The output shaft of the tension motor 29 is connected to the tension roller 30. The tension roller 30 is located inside the material passage at the feed end.

[0051] The output shaft of the tension motor 29 drives the tension roller 30 to rotate, which is used to block the synthetic leather and hot melt film, so that the synthetic leather and hot melt film can enter the preheating box 22 more stably.

[0052] The material discharge cooling mechanism 5 includes a cooling box 31. The cooling box 31 is equipped with a mesh partition 32 and a cold air box 34. The mesh partition 32 is fixed to the upper end of the cold air box 34. A cold air duct assembly 33 is fixed inside the cold air box 34. The air inlet of the cold air duct assembly 33 is connected to the air outlet of the exhaust fan. The air outlet of the cold air duct assembly 33 is located below the mesh partition 32. The cooling box 31 is equipped with discharge through holes at both ends. The discharge through holes are located above the mesh partition 32.

[0053] After being heated, the composite synthetic leather enters through the discharge hole at one end and exits through the discharge hole at the other end. The exhaust fan draws cool air into the cold air duct assembly 33, and the cold air box 34 cools the cold air duct assembly 33 to obtain cold air, which is discharged from the mesh partition 32 into the cooling chamber 31 to cool the heated composite synthetic leather. The cold air is discharged from the discharge holes at both ends of the cooling chamber 31 to prevent dust from entering the cooling chamber 31.

[0054] The hot pressing mechanism 4 also includes a base 35, with a heat insulation cover 36 fixed to the upper end of the base 35. The heat insulation cover 36 is connected to the heat-conducting air duct 3. The end of the heat insulation cover 36 is provided with an inlet / outlet 40, which is directly opposite the material passage and discharge passage. Heat insulation observation windows 37 are provided on both sides of the heat insulation cover 36. A storage box 41 is fixed to the upper end of the base 35. The hot pressing main roller assembly includes a main roller motor 42 and a fixed support 43. The main roller motor 42 is fixed inside the storage box 41. The fixed support 43 is fixed to the upper end of the base 35. The fixed support 43 is C-shaped. A main roller bearing seat 44 is fixed to the end of the fixed support 43. A hot pressing main roller 38 is rotatably provided between the two main roller bearing seats 44. The hot pressing main roller 38 is an electromagnetic heating roller. The output shaft of the main roller motor 42 is connected to the lower end of the hot pressing main roller 38. The hot pressing main roller 38 extends out of the inlet / outlet 40.

[0055] The main pressing roller 38 is an electromagnetic heating roller connected to an external power source. The pressing temperature of the main pressing roller 38 is controlled. The preheated synthetic leather and hot melt film enter the heat insulation cover 36 from the inlet / outlet 40 and enter between the main pressing roller 38 and the adjusting pressing roller assembly 39. The output shaft of the main roller motor 42 drives the main pressing roller 38 to rotate, and gradually presses the preheated synthetic leather and hot melt film together. The hot melt film melts and bonds the synthetic leather to the synthetic material to form composite synthetic leather. The pressed composite synthetic leather is discharged from the inlet / outlet 40 and enters the discharge cooling mechanism 5.

[0056] The adjustable heat press roller assembly 39 includes a fixed frame 49, which is C-shaped and fixed above the base 35. Two adjusting motors 50 are fixed on the fixed frame 49. Both the upper and lower ends of the inner side of the fixed frame 49 are rotatably provided with lead screws 47. The lead screws 47 are connected to the output shafts of the adjusting motors 50 at the same height. Both the upper and lower ends of the inner side of the fixed frame 49 are fixed with slide rails 51. Sliding seats 45 are slidably provided on the slide rails 51. The sliding seats 45 are connected to the lead screws 47 at the same height. Adjustable roller bearing seats 46 are fixed on the inner side of the sliding seats 45. An adjustable heat press roller 48 is provided between the two adjustable roller bearing seats 46. The adjustable heat press roller 48 is an electromagnetic heating roller.

[0057] According to the thickness requirements of the composite synthetic leather, the output shaft of the adjusting motor 50 drives the lead screw 47 to rotate. The sliding seat 45 is driven by the lead screw 47 of the same height, which drives the sliding seat 45 to slide on the slide rail 51 of the same height, thereby adjusting the distance between the adjusting pressing roller 48 and the pressing main roller 38. From the inlet to the outlet, the distance between the adjusting pressing roller 48 and the pressing main roller 38 decreases in sequence to perform progressive pressing. The adjusting pressing roller 48 is an electromagnetic heating roller, connected to an external power source, and the pressing temperature of the adjusting pressing roller 48 is controlled. The adjusting pressing roller 48 cooperates with the pressing main roller 38 to simultaneously press the synthetic leather and the hot melt film from both sides.

[0058] Working principle of the invention:

[0059] According to the thickness requirements of composite synthetic leather, the output shaft of the adjusting motor 50 drives the screw 47 to rotate. The sliding seat 45 is driven by the screw 47 of the same height, and drives the sliding seat 45 to slide on the slide rail 51 of the same height, thereby adjusting the distance between the pressing roller 48 and the pressing main roller 38. From the inlet to the outlet, the distance between the pressing roller 48 and the pressing main roller 38 is gradually reduced to perform progressive pressing.

[0060] The main pressing roller 38 is an electromagnetic heating roller, connected to an external power source, which controls the pressing temperature of the main pressing roller 38. The adjusting pressing roller 48 is an electromagnetic heating roller, connected to an external power source, which controls the pressing temperature of the adjusting pressing roller 48.

[0061] The three winding and unwinding mechanisms 1 at the front of the feeding and preheating mechanism 2, when winding, are driven by two tilting hydraulic cylinders 12 to tilt the L-shaped tilting frame 8. The L-shaped tilting frame 8 abuts against the first stop seat 7. At this time, the discharge V-shaped groove 9 is placed horizontally, and the synthetic leather roll and the hot melt film roll are inserted and placed in the winding assembly 10. The output shaft of the winding motor 13 drives the rotating screw 18 to rotate. The rotating screw 18 is driven by the screw seat 17, which lifts and lowers the screw seat 17. When the screw seat 17 is lifted, the screw seat 17 pulls the hinge connecting rod 16. The hinge connecting rod 16 pulls along the guide seat 20 and along the guide rod 19 towards the rotating screw 18, thereby pulling the connecting rod to move inward, which drives the winding arc plate 21 to move inward synchronously. Several circumferentially distributed winding arc plates 21 come together, tensioning the rubber layer away from the winding shaft of the synthetic leather roll and the hot melt film roll, and clamping the synthetic leather roll. The synthetic leather roll is placed on the first and third winding and unwinding mechanisms 1 at the front of the feeding and preheating mechanism 2, and the hot melt film is placed on the second winding and unwinding mechanism 1 at the front of the roll feeding and preheating mechanism 2. Two tilting hydraulic cylinders 12 drive the L-shaped tilting frame 8 to tilt. The L-shaped tilting frame 8 abuts against the second stop 11. When unwinding, the output shaft of the roll motor 13 drives the rotating screw 18 to reverse. The rotating screw 18 is driven by the screw seat 17, which drives the screw seat 17 to descend. Several circumferentially distributed roll arc plates 21 unfold outward. The tension rubber layer abuts against the roll shaft of the synthetic leather roll and the hot melt film roll. The output shaft of the power motor drives the fixed seat 14 to rotate through the transmission sprocket pair, thereby driving the roll arc plates 21 to rotate, so as to unwind the synthetic leather roll and the hot melt film roll. The hot melt film is located between the two layers of synthetic leather and is unwound.

[0062] The output shaft of the tension motor 29 drives the tension roller 30 to rotate, which is used to block the synthetic leather and hot melt film, so that the synthetic leather and hot melt film can enter the preheating box 22 more stably.

[0063] Synthetic leather and hot melt film enter vertically through the material passage on one side and exit through the material passage on the other side. The air inlet of the blower 23 draws the heat from the hot pressing mechanism 4 through the heat-conducting air pipe 3, and blows it into the preheating box 22 through the air outlet pipe 24 and the air distribution pipe 25 to better preheat the synthetic leather and hot melt film. Some of the air is drawn into the lower cooling box 27 by the exhaust fan for cooling, and the cool air is introduced into the material discharge cooling mechanism 5 for cooling. Some of the air is discharged through the material passage to prevent dust from entering the preheating box 22.

[0064] Preheated synthetic leather and hot melt film enter the heat insulation cover 36 through the inlet / outlet 40, and then between the main pressing roller 38 and the adjusting pressing roller assembly 39. The output shaft of the main roller motor 42 drives the main pressing roller 38 to rotate. The adjusting pressing roller 48 cooperates with the main pressing roller 38, and simultaneously performs progressive pressing and bonding of the preheated synthetic leather and hot melt film from both sides. The hot melt film melts, bonding the synthetic leather and the synthetic material together to form a composite synthetic leather. The composite leather after pressing... The finished leather is discharged from the inlet / outlet 40. The hot-pressed composite synthetic leather enters from the discharge hole at one end and exits from the discharge hole at the other end. The exhaust fan draws cool air into the cold air duct assembly 33. The cold air box 34 cools the cold air duct assembly 33 to obtain cold air, which is discharged from the mesh partition 32 into the cooling box 31 to cool the hot-pressed composite synthetic leather. The cold air is discharged from the discharge holes at both ends of the cooling box 31 to prevent dust from entering the cooling box 31.

[0065] Then, the output shaft of the power motor drives the fixed seat 14 to rotate through the transmission sprocket pair via the front of the discharge cooling mechanism 5, thereby driving the roll material arc plate 21 to rotate and roll up to form a composite synthetic leather roll. After winding, the two flipping hydraulic cylinders 12 drive the L-shaped flipping frame 8 to flip. The L-shaped flipping frame 8 abuts against the first stop 7. At this time, the discharge V-shaped groove 9 is placed horizontally, the roll material assembly 10 is retracted, the composite synthetic leather roll is released, and the roll is taken out.

[0066] In summary, the winding and unwinding mechanism 1 can be used for vertical winding and unwinding. By cooperating with several winding and unwinding mechanisms 1 and the tension roller assembly 26, vertical unwinding can be performed. The operation is simple and practical.

[0067] By cooperating with the feeding preheating mechanism 2, the heat-conducting air duct 3, and the hot pressing mechanism 4, heat can be reused to better and more uniformly preheat synthetic leather and hot melt film, ensuring the hot pressing effect. At the same time, it can exhaust air to prevent dust from entering the preheating box 22.

[0068] By cooperating with the material discharge cooling mechanism 5 and the material feeding preheating mechanism 2, uniform cold air cooling is achieved on the hot-pressed composite synthetic leather, which is convenient for quick winding and unloading mechanism 1. At the same time, exhaust air can be provided to prevent dust from entering the cooling box 31.

[0069] The hot pressing mechanism 4 cooperates with the hot pressing main roller assembly and several adjusting hot pressing roller assemblies 39 to adjust the distance between the adjusting hot pressing roller 48 and the hot pressing main roller 38. From the inlet to the outlet, the distance between the adjusting hot pressing roller 48 and the hot pressing main roller 38 decreases in sequence to perform progressive hot pressing and pressing, so as to achieve good hot pressing and pressing effect and high efficiency.

[0070] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A hot-melt film composite synthetic leather hot-pressing device, comprising a feeding preheating mechanism (2) and a discharge cooling mechanism (5) arranged side by side in a horizontal direction, characterized in that, The feeding preheating mechanism (2) and the discharge cooling mechanism (5) are connected. Several winding and unwinding mechanisms (1) are placed at the front of the feeding preheating mechanism (2). A tensioning roller assembly (26) is provided on the front side of the feeding preheating mechanism (2). A winding and unwinding mechanism (1) is placed at the front of the discharge cooling mechanism (5). A hot pressing mechanism (4) is provided on the rear side of the feeding preheating mechanism (2) and the discharge cooling mechanism (5). The feeding preheating mechanism (2) and the hot pressing mechanism (4) are connected. The hot pressing mechanism (4) includes a hot pressing main roller assembly and several adjusting hot pressing roller assemblies (39) arranged on both sides of the hot pressing main roller assembly. The hot pressing mechanism (4) also includes a bottom The base (35) has a heat insulation cover (36) fixed at its upper end. The heat insulation cover (36) is connected to the heat-conducting air duct (3). The end of the heat insulation cover (36) is provided with an inlet and outlet (40). The inlet and outlet (40) are directly opposite the material passage and discharge passage. The heat insulation cover (36) has heat-insulated observation windows (37) on both sides. The upper end of the base (35) is fixed with a storage box (41). The hot pressing main roller assembly includes a main roller motor (42) and a fixed support (43). The main roller motor (42) is fixed inside the storage box (41). The fixed support (43) is fixed at the upper end of the base (35). The fixed support (43) is C-shaped. The end of the fixed support (43) is fixed with a main roller bearing seat (44), and a hot pressing main roller (38) is rotatably arranged between the two main roller bearing seats (44). The hot pressing main roller (38) is an electromagnetic heating roller. The output shaft of the main roller motor (42) is connected to the lower end of the hot pressing main roller (38) for transmission. The hot pressing main roller (38) extends out of the inlet and outlet (40). The adjusting hot pressing roller assembly (39) includes a fixed frame (49). The fixed frame (49) is C-shaped and fixed above the base (35). Two adjusting motors (50) are fixed on the fixed frame (49). The upper and lower ends of the inner side of the fixed frame (49) are both rotated. A lead screw (47) is provided, which is connected to the output shaft of an adjustment motor (50) of the same height. The upper and lower ends of the inner side of the fixed frame (49) are fixed with slide rails (51). Slide seats (45) are slidably provided on the slide rails (51). The slide seats (45) are connected to the lead screw (47) of the same height. Adjusting roller bearing seats (46) are fixed on the inner side of the slide seats (45). An adjusting hot pressing roller (48) is provided between the two adjusting roller bearing seats (46). The adjusting hot pressing roller (48) is an electromagnetic heating roller. Along the direction from in to out, the distance between the adjusting hot pressing roller (48) and the hot pressing main roller (38) decreases in sequence.

2. The hot-pressing equipment for hot-melt film composite synthetic leather according to claim 1, characterized in that, The winding and unwinding mechanism (1) includes a base (6), with a first stop (7), a hinge seat, and a second stop (11) fixed sequentially on the upper end of the base (6). An L-shaped flipping frame (8) is hinged to the upper end of the hinge seat. Two flipping hydraulic cylinders (12) are hinged between the L-shaped flipping frame (8) and the base (6). A discharge V-shaped groove (9) is provided on one side of the L-shaped flipping frame (8), and a winding assembly (10) is provided on the other side of the L-shaped flipping frame (8).

3. The hot-pressing equipment for hot-melt film composite synthetic leather according to claim 2, characterized in that, The coil assembly (10) includes a fixed base (14) and a power motor. The fixed base (14) is rotatably disposed below the other side of the L-shaped tilting frame (8). The power motor is fixed below the other side of the L-shaped tilting frame (8). A transmission sprocket pair is provided between the output shaft of the power motor and the fixed base (14). A coil motor (13) is fixed at the lower end of the fixed base (14). The output shaft of the coil motor (13) passes through the fixed base (14) and the other side of the L-shaped tilting frame (8). Several fixed discs (15) are fixed at the upper end of the fixed base (14). The internal rotating mechanism of the several fixed discs (15) is... There is a rotating screw (18), which is fixedly connected to the upper end of the output shaft of the coil motor (13). Several screw seats (17) are connected to the rotating screw (18) for transmission. Several guide rods (19) are fixed on the fixed plate (15) and are evenly distributed in a circle. Guide seats (20) are slidably provided on the guide rods (19). A hinged connecting rod (16) is hinged between the guide seat (20) and the screw seat (17) above it. A connecting rod is fixed on the guide seat (20). A coil arc plate (21) is fixed on the connecting rod in the same vertical row. A tension rubber layer is provided on the outer surface of the coil arc plate (21).

4. The hot-pressing equipment for hot-melt film composite synthetic leather according to claim 1, characterized in that, The feeding preheating mechanism (2) includes a preheating box (22), a lower cooling box (27) is fixed at the bottom of the preheating box (22), an induced draft fan (23) is fixed on the side of the preheating box (22), an air outlet pipe (24) is connected to the air outlet end of the induced draft fan (23), a distribution pipe (25) is provided at the upper end of the preheating box (22), the distribution pipe (25) is connected to the air outlet pipe (24), material passage holes are provided at both ends of the preheating box (22), the material passage holes are located in the lower cooling box (27), a heat conduction air pipe (3) is connected to the air inlet end of the induced draft fan (23), and an exhaust fan is provided inside the lower cooling box (27).

5. The hot-pressing equipment for hot-melt film composite synthetic leather according to claim 4, characterized in that, The tension roller assembly (26) includes two mounting plates (28), which are respectively fixed on the top of the preheating box (22) and the top of the lower cooling box (27). A tension roller (30) is rotatably mounted between the two mounting plates (28). A tension motor (29) is fixed on the upper mounting plate (28). The output shaft of the tension motor (29) is connected to the tension roller (30) for transmission. The tension roller (30) is located inside the material passage hole at the feed end.

6. The hot-pressing equipment for hot-melt film composite synthetic leather according to claim 5, characterized in that, The discharge cooling mechanism (5) includes a cooling box (31), inside which is provided a mesh partition (32) and a cold air box (34). The mesh partition (32) is fixed at the upper end of the cold air box (34). Inside the cold air box (34) is a cold air duct assembly (33). The air inlet of the cold air duct assembly (33) is connected to the air outlet of the exhaust fan. The air outlet of the cold air duct assembly (33) is located below the mesh partition (32). The two ends of the cooling box (31) are provided with discharge through holes, which are located above the mesh partition (32).

Images