Solvent-free compound machine for processing non-woven bags

Abstract

The invention provides a solvent-free compound machine for non-woven fabric bag processing, and belongs to the technical field of solvent-free compound machines, the solvent-free compound machine comprises a compound machine body, and mounting plates, a winding drum and an inner shaft which are arranged on the compound machine body, the two mounting plates are symmetrically mounted on the outer side wall of the compound machine body, and a groove is formed in the outer wall of one side of one mounting plate. According to the invention, through the unique structure that the winding drum and the inner shaft perform differential reverse rotation, and by matching with the regulation and control effect of the turbine, the flow velocity of a cooling medium can be synchronously adjusted, and in the initial winding stage of the composite material, the design can effectively avoid the bad condition of excessive cooling, and in the later winding stage, the cooling efficiency is greatly improved. Compared with a traditional mode that the power of the pump body is directly changed, response is carried out in the whole adjusting process through linkage between mechanical structures, and the mode enables the response speed to be higher and is more stable and reliable in the operation process.

Description

Technical Field

[0001] This invention relates to the field of solvent-free laminating machine technology, and more specifically, to a solvent-free laminating machine for processing nonwoven bags. Background Technology

[0002] Solvent-free laminating machines used in non-woven bag processing are specialized pieces of equipment. Their main function is to skillfully and tightly bond multiple layers of different non-woven fabric materials together into a complete, integrated product using solvent-free adhesives as a key medium. Thanks to its unique working principle and advanced technology, this equipment can efficiently and accurately complete the lamination process, ensuring superior product quality and stable performance. It has extremely wide applications in the manufacturing of many related products, playing a crucial role, especially in the production of environmentally friendly packaging bags and shopping bags.

[0003] In existing technologies, traditional solvent-free laminating machines generate heat during the lamination of nonwoven fabrics due to the exothermic reaction of adhesive curing and the friction between materials. Although the laminating machine is equipped with corresponding heat dissipation rollers, the contact time between the rollers and the unit composite material is short, resulting in incomplete heat dissipation. If the residual heat is not effectively dissipated in time during the subsequent winding process, it will cause immediate heating after winding, adversely affecting the interlayer bonding strength of the composite material. In severe cases, it may even lead to material deformation and blistering, thus affecting the overall quality of the composite material. How to invent a solvent-free laminating machine for processing nonwoven bags to solve these problems has become an urgent issue for those skilled in the art. Summary of the Invention

[0004] To overcome the above deficiencies, this invention provides a solvent-free laminating machine for processing nonwoven bags, which aims to solve the problem of residual heat not being dissipated in a timely and effective manner during the subsequent composite material winding process. This heat will cause immediate heating after winding, which will have an adverse effect on the interlayer bonding strength of the composite material. In severe cases, it may even lead to material deformation and blistering, thereby affecting the overall quality of the composite material.

[0005] This invention is implemented as follows:

[0006] This invention provides a solvent-free laminating machine for processing nonwoven bags, including a laminating machine body and an mounting plate, a winding drum, and an inner shaft disposed on the laminating machine body. Two mounting plates are symmetrically mounted on the outer side walls of the laminating machine body. One of the mounting plates has a groove on one side of its outer wall, and a liquid outlet is formed on the inner wall of the groove. A recovery pipe is installed at one end of the liquid outlet. A motor is installed at one end of the mounting plate, and a drive gear is installed at the output end of the motor. A sealing cover and a pump body are installed on the outer wall of the other mounting plate.

[0007] The winding drum is installed between two mounting plates. An internal gear ring and a fixed shaft are respectively installed at both ends of the winding drum. The surface of the fixed shaft is provided with multiple water inlet holes.

[0008] The inner shaft is installed inside the winding drum. A rotating shaft and a connecting shaft are respectively installed at both ends of the inner shaft. A turbine is installed on the outer wall of the rotating shaft. A rotating sleeve is installed at one end of the connecting shaft. Several water outlet holes are opened at one end of the rotating sleeve. An external toothed ring is installed on the outer wall of the rotating sleeve.

[0009] Preferably, one end of the recovery pipe is connected to the cooling medium discharge pipe via a flange and bolts, one end of the drive gear shaft is rotatably connected to the inner wall of the mounting plate, and the sealing cover and pump body are fixed to the mounting plate by bolts.

[0010] Preferably, an inlet pipe is installed at the upper end of the sealing cover, and a connecting pipe is installed between the liquid outlet end of the pump body and the inlet pipe at the upper end of the sealing cover through a flange and bolts. The liquid inlet end of the pump body is connected to a cooling medium input pipe through a flange and bolts.

[0011] Preferably, the inner side of the internal gear ring and the outer side of the drive gear are meshed together; the outer wall of the fixed shaft and the inner wall of one of the mounting plates are rotatably connected; the outer wall of the rotating shaft and the inner wall of one end of the winding drum are rotatably connected; the outer wall of the rotating sleeve and the inner wall of the groove are rotatably connected; the outer side of the external gear ring and the drive gear are meshed together; and the inner wall of the winding drum is provided with a threaded groove.

[0012] By employing a unique structure that allows for differential counter-rotation between the winding drum and the inner shaft, coupled with the regulating effect of the turbine, the flow rate of the cooling medium can be synchronously adjusted. Throughout the entire winding process of the composite material, this design achieves dynamic adaptation between cooling efficiency and changes in roll diameter. In the initial stage of composite material winding, this design effectively avoids over-cooling, while in the later stage of winding, it effectively solves the problem of insufficient heat dissipation. Compared with the traditional method of directly changing the pump power, the entire adjustment process responds through the linkage between mechanical structures. This method not only makes the response speed faster but also more stable and reliable during operation.

[0013] Preferably, the surface of the mounting plate has two adjacent grooves, and a fastening assembly is installed above the winding drum. The fastening assembly includes a fixing frame, a spring, a slider, a fixing block, and a pressure roller.

[0014] Preferably, the fixing frame is fixedly connected to the side wall of one of the mounting plates, the inner wall of the fixing frame and the outer wall of the slider are slidably connected by a slide rail, and the two ends of the spring are respectively fixedly connected to the upper inner wall of the fixing frame and the upper end of the slider.

[0015] Preferably, the two fixing blocks are mounted on the side walls of the two mounting plates, the two end shafts of the pressure roller are rotatably connected to the inner walls of the two end fixing blocks, the two end shafts of the pressure roller are slidably connected to the inner walls of the slide groove, and the side wall of one of the fixing blocks is fixedly connected to the side wall of the slider.

[0016] Preferably, a flattening roller is also installed between the two fixed blocks. The two ends of the flattening roller are rotatably connected to the inner wall of the fixed block, and the two ends of the flattening roller are slidably connected to the inner wall of another groove. Opposite spiral grooves are opened on the side walls of the two ends of the flattening roller.

[0017] Preferably, a drive gear is installed on one end sidewall of the pressure roller, and a driven gear is installed on one end sidewall of the flattening roller, with the drive gear and the driven gear meshing together.

[0018] By adopting the above technical solution, the pressure rollers are set to gradually increase the pressure on the fabric roll according to the roll diameter, so as to ensure that the appropriate tension can be maintained at different roll diameter stages. In the early stage of winding, excessive pressure can be avoided to prevent the solventless adhesive at the bonding of the composite material from being squeezed out under high pressure. In the later stage of winding, the pressure is increased to compact the composite material roll, preventing the fabric roll from being too loose and affecting the winding quality.

[0019] The beneficial effects of this invention are:

[0020] The unique structure of differential reverse rotation between the winding drum and the inner shaft, combined with the regulating role of the turbine, enables synchronous adjustment of the cooling medium flow rate. In the early stage of composite material winding, this design can effectively avoid over-cooling, while in the later stage of winding, it can effectively solve the problem of insufficient heat dissipation. Compared with the traditional method of directly changing the pump power, the entire adjustment process is responded to through the linkage between mechanical structures. This method not only makes the response speed faster, but also makes the operation more stable and reliable.

[0021] Meanwhile, the spiral grooves inside the winding drum alter the flow path of some of the cooling medium, causing radial turbulence and disrupting the laminar boundary layer. This enhances the convective heat transfer coefficient between the cooling medium and the inner wall of the winding drum. Furthermore, the spiral-flowing cooling medium forms a continuous vortex structure inside the winding drum, resulting in a more uniform temperature distribution. This allows for thorough mixing of the cooling medium, preventing localized overheating or undercooling and thus avoiding uneven cooling that could affect the overall quality of the fabric roll. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of a solventless laminating machine for processing nonwoven bags, provided by an embodiment of the present invention.

[0024] Figure 2 This is a partial front view of a solvent-free laminating machine for processing nonwoven bags provided in an embodiment of the present invention;

[0025] Figure 3 This is a partial side view of a solvent-free laminating machine for processing nonwoven bags provided in an embodiment of the present invention;

[0026] Figure 4 This is a partial structural cross-sectional view of a solventless laminating machine for processing nonwoven bags provided in an embodiment of the present invention;

[0027] Figure 5 This invention provides a solvent-free laminating machine for processing nonwoven bags. Figure 4 Enlarged view of the structure of region A in the middle;

[0028] Figure 6 This is a partial structural diagram of the take-up drum assembly in a solventless laminating machine for processing nonwoven bags, provided by an embodiment of the present invention.

[0029] Figure 7 This is a partial cross-sectional view of the inner shaft structure in a solventless laminating machine for processing nonwoven bags, provided by an embodiment of the present invention.

[0030] In the diagram: 1. Composite machine body; 2. Mounting plate; 21. Slide groove; 22. Groove; 23. Liquid outlet; 24. Recovery pipe; 25. Motor; 26. Drive gear; 27. Sealing cover; 28. Pump body; 29. ​​Connecting pipe; 3. Rewind drum; 31. Internal gear ring; 32. Fixed shaft; 321. Water inlet; 33. Threaded groove; 4. Inner shaft; 41. Rotating shaft; 42. Turbine; 43. Connecting shaft; 44. Rotating sleeve; 441. Water outlet; 45. External gear ring; 5. Fastening assembly; 51. Fixed frame; 52. Spring; 53. Slider; 54. Fixed block; 55. Pressure roller; 551. Drive gear; 56. Flattening roller; 561. Driven gear. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example, refer to Figures 1-7 A solventless laminating machine for processing nonwoven bags includes a laminating machine body 1 and mounting plates 2, a winding drum 3 and an inner shaft 4 disposed on the laminating machine body 1. Two mounting plates 2 are symmetrically installed on the outer side wall of the laminating machine body 1. One side of the outer wall of one mounting plate 2 has a groove 22 and an outlet 23 is provided on the inner wall of the groove 22. A recovery pipe 24 is installed at one end of the outlet 23. A motor 25 is installed at one end of the mounting plate 2 and a drive gear 26 is installed at the output end of the motor 25. A sealing cover 27 and a pump body 28 are installed on the outer wall of the other mounting plate 2.

[0033] The winding drum 3 is installed between two mounting plates 2. The two ends of the winding drum 3 are respectively equipped with an internal gear ring 31 and a fixed shaft 32. The surface of the fixed shaft 32 is provided with multiple water inlet holes 321.

[0034] The inner shaft 4 is installed inside the winding drum 3. The two ends of the inner shaft 4 are respectively equipped with a rotating shaft 41 and a connecting shaft 43. A turbine 42 is installed on the outer wall of the rotating shaft 41. A rotating sleeve 44 is installed on one end of the connecting shaft 43. Several water outlet holes 441 are opened on one end of the rotating sleeve 44. An external toothed ring 45 is installed on the outer wall of the rotating sleeve 44.

[0035] Furthermore; one end of the recovery pipe 24 is connected to the cooling medium discharge pipe via a flange and bolts; one end of the shaft of the drive gear 26 is rotatably connected to the inner wall of the mounting plate 2; the sealing cover 27 and the pump body 28 are fixed to the mounting plate 2 with bolts; an inlet pipe is installed at the upper end of the sealing cover 27; the liquid outlet end of the pump body 28 and the inlet pipe at the upper end of the sealing cover 27 are connected to the connecting pipe 29 via a flange and bolts; the liquid inlet end of the pump body 28 is connected to the cooling medium input pipe via a flange and bolts; the inner side of the internal gear ring 31 is meshed with the outer side of the drive gear 26; the outer wall of the fixed shaft 32 is rotatably connected to the inner wall of one of the mounting plates 2; the outer wall of the rotating shaft 41 is rotatably connected to the inner wall of one end of the winding drum 3; the outer wall of the rotating sleeve 44 is rotatably connected to the inner wall of the groove 22; the outer side of the external gear ring 45 is meshed with the drive gear 26; and a threaded groove 33 is provided on the inner wall of the winding drum 3.

[0036] It should be noted that after the multi-layer nonwoven fabric material is solvent-free laminated by the composite machine body 1, it is wound up by the take-up drum 3. During the winding process, the motor 25 is started first and drives the drive gear 26 to rotate. The drive gear 26 meshes with the inner gear ring 31 and the outer gear ring 45 at the same time, driving the take-up drum 3 and the inner shaft 4 to rotate in opposite directions at different speeds. When the take-up drum 3 rotates, it realizes the active winding of the composite material. The heat remaining in the composite material processing will be conducted to the take-up drum 3. At the same time, the pump body 28 is started with a fixed power and draws the cooling medium from the cooling medium input pipe. It enters the interior of the take-up drum 3 through the water inlet 321 at one end of the fixed shaft 32. During the flow, it contacts the inner wall of the take-up drum 3 for heat exchange, thereby cooling the take-up drum 3 and ensuring the heat dissipation effect of the composite material roll.

[0037] When the inner shaft 4 starts to rotate, it synchronously drives the outer turbine 42 to rotate. During the rotation of the turbine 42, it causes the internal cooling medium to tend to flow in the opposite direction. The force generated by this tendency is offset by the force of the normal flow of the cooling medium, thereby slowing down the flow rate of the cooling medium to a certain extent. In the early stage of composite material winding, the number of layers in the roll is small, the roll diameter is small, and the thermal resistance is at a low level. In order to coordinate with the uniform feeding operation of the composite material in the composite machine body 1, the motor 25 drives the winding drum 3 to rotate at high speed. At the same time, the rotating shaft 41 drives the turbine 42 to rotate synchronously at high speed. At this time, the resistance of the turbine 42 to the flow of the cooling medium increases, further reducing the flow rate of the cooling medium and prolonging the residence time of the cooling medium inside the winding drum 3 per unit time. Thus, for composite material rolls with small roll diameters, the resistance to the flow of the cooling medium increases, further reducing the flow rate of the cooling medium and prolonging the residence time of the cooling medium inside the winding drum 3 per unit time. To achieve a deeper heat absorption effect during heat dissipation, limiting the total flow rate of the cooling medium at the initial stage of winding extends the residence time of the cooling medium inside the winding drum 3 per unit time. This allows the cooling medium more time to fully exchange heat with the winding drum 3. In actual cooling processes, excessive waste of coolant often occurs in the initial stage. This method can effectively avoid this problem. It ensures that the cooling medium is used efficiently, allowing each portion of the cooling medium to fully exert its cooling effect. At the same time, it can prevent the low-temperature cooling medium from flowing too fast, causing the core to become too cold. Overcooling of the core may adversely affect the quality of subsequent composite material rolls. This method ensures that the quality of subsequent composite material rolls reaches the expected quality by reasonably controlling the cooling process.

[0038] As the diameter of the composite material fabric roll wound around the outside of the take-up drum 3 continues to increase, the thermal resistance between the fabric rolls will gradually increase accordingly. At this time, the motor 25 will drive the take-up drum 3 to rotate, and its speed will gradually decrease. At the same time, the rotating shaft 41 will drive the turbine 42 to rotate together, and the speed of the turbine 42 will also decrease synchronously. Therefore, the resistance of the turbine 42 to the flow of cooling medium will decrease, and the flow rate of cooling medium will gradually increase. This shortens the residence time of the cooling medium inside the take-up drum 3 per unit time, allowing a large flow of coolant to pass through the take-up drum 3 quickly. This can remove the residual heat deep in the composite material fabric roll to the maximum extent, effectively addressing the problem of increased thermal resistance caused by the increase in the diameter of the composite material fabric roll, thus ensuring the stability of overall heat dissipation and avoiding problems in later winding stages. When the diameter increases, insufficient heat dissipation occurs, thus ensuring the stability of the roll material quality. Through the unique structure of differential reverse rotation between the winding drum 3 and the inner shaft 4, and the regulating role of the turbine 42, the flow rate of the cooling medium can be synchronously adjusted. Throughout the entire process of composite material winding, this design can achieve dynamic adaptation between cooling efficiency and roll diameter changes. In the early stage of composite material winding, this design can effectively avoid the adverse situation of over-cooling, while in the later stage of winding, it can effectively solve the problem of insufficient heat dissipation. Compared with the traditional method of directly changing the power of the pump body 28, the entire adjustment process responds through the linkage between mechanical structures. This method not only makes the response speed faster, but also makes it more stable and reliable during operation.

[0039] Meanwhile, a threaded groove 33 is formed on the inner wall of the winding drum 3. This allows the cooling medium to be effectively guided along the spiral path formed by the threaded groove 33 during the entire flow process, resulting in a stable spiral flow pattern. This stable spiral flow pattern greatly extends the contact path between the cooling medium and the inner wall of the winding drum 3. Because the cooling medium flows along the spiral path, compared to straight flow, the contact distance with the inner wall is longer, which in turn extends the heat exchange time between the cooling medium and the inner wall of the winding drum 3. By extending the contact path and heat exchange time, the heat exchange efficiency can be further improved. Furthermore, because the flow velocity of the cooling medium near the inner wall and the cooling medium near the outer wall are different in the threaded groove 33, this flow velocity... The difference will generate a certain pressure difference, which will cause radial turbulence disturbance in the cooling medium. This radial turbulence disturbance breaks the formation of the laminar boundary layer, which can enhance the convective heat transfer coefficient between the cooling medium and the inner wall of the winding drum 3. Furthermore, the spiral flow of the cooling medium will form a continuous vortex structure inside the winding drum 3. This continuous vortex structure makes the temperature distribution of the cooling medium inside the winding drum 3 more uniform. Because the vortex structure can drive the cooling medium to mix fully, it avoids the occurrence of local overheating or overcooling. Uniform temperature distribution is crucial for the cooling of the composite material roll, ensuring that the composite material roll can be cooled evenly, thereby avoiding uneven cooling from affecting the overall quality of the roll.

[0040] Furthermore, two adjacent grooves 21 are formed on the surface of the mounting plate 2. A fastening assembly 5 is installed above the winding drum 3. The fastening assembly 5 includes a fixing frame 51, a spring 52, a slider 53, fixing blocks 54, and a pressure roller 55. The fixing frame 51 is fixedly connected to the side wall of one of the mounting plates 2. The inner wall of the fixing frame 51 and the outer wall of the slider 53 are slidably connected by a slide rail. The two ends of the spring 52 are fixedly connected to the upper inner wall of the fixing frame 51 and the upper end of the slider 53, respectively. Two fixing blocks 54 are installed on the side walls of the two mounting plates 2. The two ends of the pressure roller 55 are rotatably connected to the inner walls of the two fixing blocks 54. Next, the two ends of the pressure roller 55 are slidably connected to the inner wall of the slide groove 21. The side wall of one of the fixed blocks 54 is fixedly connected to the side wall of the slider 53. A flattening roller 56 is also installed between the two fixed blocks 54. The two ends of the flattening roller 56 are rotatably connected to the inner wall of the fixed block 54. The two ends of the flattening roller 56 are slidably connected to the inner wall of the other slide groove 21. Opposite spiral grooves are opened on the side walls of the two ends of the flattening roller 56. A drive gear 551 is installed on one side wall of the pressure roller 55, and a driven gear 561 is installed on one side wall of the flattening roller 56. The drive gear 551 and the driven gear 561 are meshed together.

[0041] It should be noted that during the winding process, after the composite material is output from the composite machine body 1, it first passes through the flattening roller 56, and then passes between the pressure roller 55 and the winding drum 3 to complete the winding. The spring 52 is always in a compressed state, applying downward elastic pressure to the slider 53. This pressure is transmitted to the flattening roller 56 and the pressure roller 55 through the fixing block 54, so that the pressure roller 55 always elastically presses against the surface of the composite material. As the diameter of the fabric roll on the outer side of the winding drum 3 increases, the pressure roller 55 is gradually lifted upward, driving the slider 53 to slide upward along the inner wall of the fixing frame 51. At the same time, the spring 52 is further compressed, and its elastic force increases accordingly, thereby automatically adjusting the pressure of the pressure roller 55 on the fabric roll, ensuring that appropriate tension can be maintained at different roll diameter stages. In the early stage of winding, excessive pressure can be avoided, which may cause the solventless adhesive at the bonding point of the composite material to be squeezed out under high pressure. In the later stage of winding, the pressure is increased to compact the composite material roll, preventing the fabric roll from being too loose and affecting the winding quality.

[0042] Simultaneously, at the instant the pressure roller 55 comes into contact with the composite material fabric, due to the friction between them, the pressure roller 55 will begin to rotate under the action of this friction. During the entire rotation process of the pressure roller 55, the drive gear 551 mounted on the pressure roller 55 will rotate along with it. Through the rotation of the drive gear 551, it will drive the driven gear 561 meshing with it to rotate. The rotation of the driven gear 561, in turn, causes the flattening roller 56 to also begin to rotate. Thus, the flattening roller 56 and the pressure roller 55 form a mechanical linkage relationship, and the rotation of both... The speed is maintained according to the gear ratio to ensure that the flattening speed and the winding speed are synchronized. Two spiral grooves with opposite spiral directions are specially opened on the side walls at both ends of the flattening roller 56. When the flattening roller 56 rotates, the spiral pattern on its surface will apply a guiding force that extends to both sides to the composite material, which can effectively eliminate the longitudinal wrinkles and transverse shrinkage deformation that may occur in the composite material after solvent-free lamination. This allows the composite material to remain flat before entering the pressure roller 55, thereby improving the quality of the rolled fabric after winding.

[0043] As the winding drum 3 continues to rotate, the diameter of the composite fabric roll gradually increases. Under these conditions, the pressure roller 55 and the flattening roller 56 slide upwards synchronously along the chute 21. The vertical guiding function of the chute 21 ensures the positional stability of the pressure roller 55 and the flattening roller 56 during the lifting process, preventing uneven pressure due to positional deviation. The fixed block 54 and the slider 53 are fixedly connected, forming an integrated lifting structure for the flattening roller 56 and the pressure roller 55. This ensures that the contact positions of the flattening roller 56 and the pressure roller 55 with the composite material are relatively fixed. The fastening component 5 has an elastic pressure adaptive adjustment function, and the flattening roller 56 has a spiral groove flattening function. These two functions work together to ensure the stability of the winding quality. The entire structure is compact and reasonable in design and reliable in operation. It can effectively improve the production efficiency of solvent-free composite processing of nonwoven bags and improve the quality of the wound product.

[0044] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail here.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A solvent-free laminating machine for processing nonwoven bags, comprising a laminating machine body (1) and a mounting plate (2), a winding drum (3), and an inner shaft (4) disposed on the laminating machine body (1), characterized in that, Two mounting plates (2) are symmetrically installed on the outer side wall of the composite machine body (1). One of the mounting plates (2) has a groove (22) on one side of its outer wall. The inner wall of the groove (22) has a liquid outlet (23). A recovery pipe (24) is installed at one end of the liquid outlet (23). A motor (25) is installed at one end of the mounting plate (2). A drive gear (26) is installed at the output end of the motor (25). A sealing cover (27) and a pump body (28) are installed on the outer wall of the other mounting plate (2). The winding drum (3) is installed between two mounting plates (2). The winding drum (3) is equipped with an internal gear ring (31) and a fixed shaft (32) at both ends. The surface of the fixed shaft (32) is provided with multiple water inlet holes (321). The inner shaft (4) is installed inside the winding drum (3). A rotating shaft (41) and a connecting shaft (43) are respectively installed at both ends of the inner shaft (4). A turbine (42) is installed on the outer wall of the rotating shaft (41). A rotating sleeve (44) is installed at one end of the connecting shaft (43). A plurality of water outlet holes (441) are opened at one end of the rotating sleeve (44). An external toothed ring (45) is installed on the outer wall of the rotating sleeve (44).

2. The solvent-free laminating machine for processing nonwoven bags according to claim 1, characterized in that, One end of the recovery pipe (24) is connected to the cooling medium discharge pipe by a flange and bolts. One end of the drive gear (26) is rotatably connected to the inner wall of the mounting plate (2). The sealing cover (27) and the pump body (28) are fixed to the mounting plate (2) by bolts.

3. The solvent-free laminating machine for processing nonwoven bags according to claim 2, characterized in that, An inlet pipe is installed at the upper end of the sealing cover (27). The outlet end of the pump body (28) and the inlet pipe at the upper end of the sealing cover (27) are connected by a flange and bolts to install a connecting pipe (29). The inlet end of the pump body (28) is connected to the cooling medium input pipe by a flange and bolts.

4. The solvent-free laminating machine for processing nonwoven bags according to claim 3, characterized in that, The inner side of the internal gear ring (31) is meshed with the outer side of the drive gear (26), the outer wall of the fixed shaft (32) is rotatably connected with the inner wall of one of the mounting plates (2), the outer wall of the rotating shaft (41) is rotatably connected with the inner wall of one end of the winding drum (3), the outer wall of the rotating sleeve (44) is rotatably connected with the inner wall of the groove (22), the outer side of the external gear ring (45) is meshed with the drive gear (26), and the inner wall of the winding drum (3) is provided with a threaded groove (33).

5. The solvent-free laminating machine for processing nonwoven bags according to claim 1, characterized in that, The mounting plate (2) has two adjacent grooves (21) on its surface. A fastening assembly (5) is installed above the winding drum (3). The fastening assembly (5) includes a fixing frame (51), a spring (52), a slider (53), a fixing block (54), and a pressure roller (55).

6. The solvent-free laminating machine for processing nonwoven bags according to claim 5, characterized in that, The fixed frame (51) is fixedly connected to the side wall of one of the mounting plates (2). The inner wall of the fixed frame (51) and the outer wall of the slider (53) are slidably connected by a slide rail. The two ends of the spring (52) are fixedly connected to the upper inner wall of the fixed frame (51) and the upper end of the slider (53), respectively.

7. A solvent-free laminating machine for processing nonwoven bags according to claim 6, characterized in that, Two fixing blocks (54) are installed on the side walls of two mounting plates (2). The two ends of the pressure roller (55) are rotatably connected to the inner walls of the two fixing blocks (54). The two ends of the pressure roller (55) are slidably connected to the inner walls of the slide groove (21). The side wall of one of the fixing blocks (54) is fixedly connected to the side wall of the slider (53).

8. A solvent-free laminating machine for processing nonwoven bags according to claim 7, characterized in that, A flattening roller (56) is also installed between the two fixed blocks (54). The two ends of the flattening roller (56) are rotatably connected to the inner wall of the fixed block (54). The two ends of the flattening roller (56) are slidably connected to the inner wall of another groove (21). Opposite spiral grooves are opened on the side walls of the two ends of the flattening roller (56).

9. A solvent-free laminating machine for processing nonwoven bags according to claim 8, characterized in that, A drive gear (551) is installed on one side wall of the pressure roller (55), and a driven gear (561) is installed on one side wall of the flattening roller (56). The drive gear (551) and the driven gear (561) are meshed together.

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