An underwear elastic tightening band hot laminating machine

Abstract

The application relates to the technical field of underwear manufacturing equipment, in particular to an underwear elastic tightening band hot laminating machine which comprises a mainframe, a heating assembly, a tension adjusting assembly, a cooling and shaping assembly and a conveying mechanism. The heating assembly realizes uniform heating through the cooperative action of a heat-conducting silica gel layer and a hot air channel; the tension adjusting assembly accurately controls the material tension by using adjusting rollers, pressure sensors and driving motors; the cooling and shaping assembly improves the cooling efficiency by using cooling plates, cooling water channels and fan groups, and improves the lamination quality in combination with shaping pressure rollers; and the conveying mechanism ensures stable material conveying by using a servo motor and a guide plate. The application can solve the problems of uneven heating, insufficient tension control and poor size stability after lamination of the traditional equipment, and meets the high-quality lamination demand.

Description

Technical Field

[0001] This utility model belongs to the field of textile machinery technology, specifically a heat bonding machine for elastic tightening bands in underwear. Background Technology

[0002] With the development of the laminating machine industry, various hot press laminating equipment has been widely used in different industries. However, these products still have some problems in actual use, especially in the hot lamination process of elastic bands for underwear, where existing equipment often cannot meet the requirements of high precision, high efficiency, and material adaptability.

[0003] A search revealed an EPE film thermal melting and laminating machine with publication number CN109159524B, published on January 17, 2023. This equipment heats and melts the EPE film using hot air nozzles and utilizes an up-and-down rolling device to achieve lamination and traction. While this design offers advantages such as cleanliness, efficiency, and economy, it is primarily suitable for thicker and more rigid materials (such as EPE film). It struggles to guarantee uniform heating and lamination for soft, highly elastic materials like underwear elastic bands. Furthermore, the equipment lacks a tension control mechanism for elastic materials, which can easily lead to material deformation or loose lamination during the lamination process, affecting the quality of the finished product.

[0004] A search revealed a hot-pressing laminating machine with publication number CN112930108B, published on August 20, 2024. This equipment employs a conveying device, a lifting device, and a hot-pressing device working in tandem to perform hot-pressing shaping on multiple locations on a workpiece. While this design boasts high lamination accuracy and a high degree of automation, its complex structure, particularly when handling elastic materials, lacks dedicated tension adjustment and cooling shaping functions. This makes it difficult to avoid dimensional deviations and poor lamination caused by material shrinkage during the hot-pressing process when dealing with materials requiring high elasticity retention, such as elastic bands for underwear.

[0005] The aforementioned problems indicate that traditional hot-press laminating machines on the market generally suffer from uneven heating, insufficient tension control, and poor dimensional stability after lamination when processing special materials such as elastic bands for underwear. Therefore, this invention provides a hot-press laminating machine for elastic bands in underwear to overcome these shortcomings and offer a more precise and efficient solution, meeting the demand for high-quality elastic band lamination in the underwear manufacturing industry. Utility Model Content

[0006] This utility model relates to a heat-bonding machine for elastic bandages in underwear, comprising a main frame, a heating component, a tension adjustment component, a cooling and shaping component, and a conveying mechanism. The heating component is installed inside the main frame, and the tension adjustment component is located at its rear end. The output end of the tension adjustment component is connected to the cooling and shaping component. The conveying mechanism is installed at the bottom of the main frame and passes through the heating component, the tension adjustment component, and the cooling and shaping component.

[0007] The heating assembly includes a heating plate, a thermally conductive silicone layer, a temperature sensor, and a hot air channel. Heating plates are symmetrically mounted on the inner wall of the main frame. The surface of each heating plate is covered with a thermally conductive silicone layer, which is 2mm to 5mm thick, to evenly transfer heat to the material to be bonded. A temperature sensor is embedded inside each heating plate to monitor its operating temperature in real time. A hot air channel is located at the rear of each heating plate. The inlet end of the hot air channel is connected to an external hot air blower, and the outlet end of the hot air channel has multiple evenly distributed air outlets to evenly blow hot air onto the surface of the material to be bonded.

[0008] The tension adjustment assembly includes an adjustment roller, a pressure sensor, a drive motor, and a sliding rail. The adjustment rollers are symmetrically installed inside the main frame, with both ends rotatably connected to the main frame via bearings. The surface of the adjustment roller is covered with a rubber layer to increase friction with the material. A pressure sensor is fixedly connected to one end of the adjustment roller to detect the pressure applied to the material. A sliding rail is located below the adjustment roller, with both ends bolted to the inner wall of the main frame. A slider is slidably connected inside the sliding rail, and an adjustment screw is threaded to the top of the slider. One end of the adjustment screw is fixed to a drive motor, which is fixed to the outer wall of the main frame via a bracket. The drive motor rotates the adjustment screw, causing the slider to move within the sliding rail, thereby changing the distance between the adjustment rollers and achieving precise control of the material tension.

[0009] The cooling and shaping assembly includes a cooling plate, cooling water channels, a fan assembly, and a shaping pressure roller. The cooling plate is installed inside the main frame, and cooling water channels are formed inside the cooling plate. The inlet and outlet ends of the cooling water channels are connected to an external circulating water cooling system to continuously reduce the temperature of the cooling plate. A fan assembly is located above the cooling plate and is bolted to the top inner wall of the main frame to accelerate airflow and further improve the cooling effect. A shaping pressure roller is located at the rear end of the cooling plate. Both ends of the shaping pressure roller are rotatably connected to the main frame via bearings. The surface of the shaping pressure roller is coated with an anti-stick coating to prevent material adhesion and to flatten the bonded material.

[0010] The conveying mechanism includes a conveyor belt, drive rollers, a servo motor, and guide plates. A conveyor belt is mounted on the bottom of the main frame, and both ends of the conveyor belt are rotatably connected to the main frame via drive rollers. One end of each drive roller is connected to a servo motor via a coupling, and the servo motor is bolted to the outer wall of the main frame to drive the conveyor belt. Guide plates are provided on both sides of the conveyor belt, and the guide plates are bolted to the inner wall of the main frame to limit the position of the material and prevent it from shifting during conveying.

[0011] This invention solves the problem of uneven heating in traditional equipment by utilizing the synergistic effect of the thermally conductive silicone layer and the hot air channel in the heating assembly. The thermally conductive silicone layer can evenly transfer heat, while the hot air channel blows hot air evenly onto the material surface through the air outlet, ensuring that the material is heated uniformly.

[0012] This invention achieves precise control of the tension of elastic materials through the cooperation of adjusting rollers, pressure sensors, and drive motors in a tension adjustment assembly. The pressure sensor detects the pressure value on the material in real time and transmits the signal to the control system. The control system adjusts the speed of the drive motor according to the set value, thereby changing the distance between the adjusting rollers and ensuring that the material maintains constant tension during the bonding process.

[0013] This invention solves the problem of low cooling efficiency in traditional equipment by combining a cooling plate, cooling water channels, and a fan assembly in the cooling and shaping component. The cooling water channels continuously reduce the temperature of the cooling plate through a circulating water cooling system, while the fan assembly accelerates airflow, significantly improving the cooling effect through this dual action. The shaping pressure roller flattens the bonded material, further improving the bonding quality.

[0014] This invention ensures the stability of materials during the conveying process through the cooperation of a servo motor and a guide plate in the conveying mechanism. The servo motor provides precise power output, while the guide plate restricts the position of the material and prevents it from shifting, thereby ensuring the smooth progress of the bonding process.

[0015] In summary, this utility model solves the problems of uneven heating, insufficient tension control, and poor dimensional stability after bonding in the prior art through the synergistic effect of its components, thus meeting the high-quality bonding requirements of elastic tightening bands for underwear. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the overall structure of this utility model from another angle.

[0018] Figure 3 for Figure 1 A magnified diagram of region A.

[0019] Figure 4 for Figure 1 A magnified diagram of region B.

[0020] The attached diagram is labeled as follows: 1. Main frame; 2. Heating assembly; 3. Tension adjustment assembly; 4. Cooling and shaping assembly; 5. Conveying mechanism; 21. Heating plate; 22. Thermally conductive silicone layer; 23. Temperature sensor; 24. Hot air channel; 31. Adjusting roller; 33. Drive motor; 34. Sliding track; 36. Adjusting screw; 41. Cooling plate; 42. Cooling water channel; 43. Fan assembly; 44. Shaping pressure roller; 51. Conveyor belt; 53. Servo motor; 54. Guide plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] Specific implementation examples are given below.

[0023] This utility model provides a heat-bonding machine for elastic bandages in underwear, the structure and operation of which are described in detail with reference to the accompanying drawings. Figure 1 As shown, the main frame 1 serves as the supporting structure for the entire device, and internally it sequentially houses the heating assembly 2, tension adjustment assembly 3, cooling and shaping assembly 4, and a conveying mechanism 5 that runs through all the components. The main frame 1 is made of metal and possesses sufficient strength and rigidity to ensure the stability of the device during operation.

[0024] The heating assembly 2 is located at the front end of the main unit frame 1, and its core components include a heating plate 21, a thermally conductive silicone layer 22, a temperature sensor 23, and a hot air channel 24. Figure 2As shown, heating plates 21 are symmetrically mounted on the inner wall of the main frame 1 and fixed with bolts to ensure stable positioning and easy disassembly and maintenance. The surface of the heating plates 21 is covered with a 2mm to 5mm thick thermally conductive silicone layer 22, which is tightly bonded to the heating plates 21 using an adhesive process, enabling uniform heat transfer to the material to be bonded. A temperature sensor 23 is embedded inside the heating plates 21, connected to the control system via wires to monitor the operating temperature of the heating plates 21 in real time and feed the data back to the control system. A hot air channel 24 is located behind the heating plates 21, with its inlet end connected to an external hot air blower via a pipe, and its outlet end having multiple evenly distributed air outlets. The air outlets of the hot air channel 24 are designed at an angle to ensure that hot air is evenly blown onto the surface of the material to be bonded.

[0025] The tension adjustment assembly 3 is located at the rear end of the heating assembly 2, and its core components include an adjustment roller 31, a pressure sensor 32, a drive motor 33, and a sliding track 34. Figure 3 As shown, the adjusting roller 31 is symmetrically mounted on the inner wall of the main frame 1 via bearings, and its two ends are rotatably connected to the main frame 1 via bushings to ensure that the adjusting roller 31 can rotate freely. The surface of the adjusting roller 31 is covered with a rubber layer, which is bonded to the adjusting roller 31 through a vulcanization process to increase the friction between the roller and the material. A pressure sensor 32 is fixedly connected to one end of the adjusting roller 31. The pressure sensor 32 is bolted to the end of the adjusting roller 31 and connected to the control system via a wire to detect the pressure value on the material and feed it back to the control system. The sliding track 34 is bolted to the inner wall of the main frame 1, and a slider 35 is slidably connected inside the sliding track 34. The top of the slider 35 is threadedly connected to an adjusting screw 36. One end of the adjusting screw 36 is connected to a drive motor 33 via a coupling, and the drive motor 33 is fixed to the outer wall of the main frame 1 via a bracket. When the drive motor 33 drives the adjusting screw 36 to rotate, the slider 35 moves along the sliding track 34, thereby changing the distance between the adjusting rollers 31 to achieve precise control of the material tension.

[0026] The cooling and shaping assembly 4 is located at the rear end of the tension adjusting assembly 3, and its core components include a cooling plate 41, a cooling water channel 42, a fan assembly 43, and a shaping pressure roller 44. Figure 4As shown, the cooling plate 41 is fixed to the inner wall of the main frame 1 by bolts. Cooling water channels 42 are formed inside the cooling plate 41. The inlet and outlet ends of the cooling water channels 42 are connected to an external circulating water cooling system via pipes to continuously reduce the temperature of the cooling plate 41. A fan assembly 43 is installed above the cooling plate 41, and is fixed to the top inner wall of the main frame 1 by bolts. The fan assembly 43 consists of multiple small fans, each connected to a power source via a wire, to accelerate airflow and further improve the cooling effect. A shaping roller 44 is installed at the rear end of the cooling plate 41. The shaping roller 44 is rotatably connected to the main frame 1 via bearings. Its surface is coated with an anti-stick coating, which is applied to the shaping roller 44 through a spraying process to prevent material adhesion. The shaping roller 44 flattens the bonded material to ensure bonding quality.

[0027] The conveying mechanism 5 extends through the bottom of the main frame 1, and its core components include a conveyor belt 51, a drive roller 52, a servo motor 53, and guide plates 54. The conveyor belt 51 is rotatably connected to the main frame 1 via the drive roller 52. One end of the drive roller 52 is connected to the servo motor 53 via a coupling. The servo motor 53 is bolted to the outer wall of the main frame 1 and is used to drive the conveyor belt 51. Guide plates 54 are provided on both sides of the conveyor belt 51. The guide plates 54 are bolted to the inner wall of the main frame 1 and are used to limit the position of the material to prevent it from shifting during the conveying process.

[0028] In actual operation, the materials to be bonded first enter the heating assembly 2 via conveyor belt 51. After the heating plate 21 is powered on, it generates heat, which is then evenly transferred to the surface of the materials through the thermally conductive silicone layer 22. Simultaneously, the hot air channel 24 blows hot air evenly onto the material surface to ensure uniform heating. Next, the material enters the tension adjustment assembly 3. The adjustment rollers 31 adjust their spacing under the control of the drive motor 33 to maintain constant tension on the material. The pressure sensor 32 detects the pressure value on the material in real time and feeds it back to the control system. The control system adjusts the speed of the drive motor 33 according to the set value to achieve precise control. Then, the material enters the cooling and shaping assembly 4. The cooling plate 41 continuously cools the material through the cooling water channel 42, and the fan assembly 43 accelerates airflow to further enhance the cooling effect. The shaping pressure roller 44 flattens the bonded material. Finally, the material is output via conveyor belt 51, completing the entire bonding process.

[0029] This invention achieves high-quality heat bonding of the elastic tightening band in underwear through the synergistic effect of the aforementioned components, solving the problems of uneven heating, insufficient tension control, and poor dimensional stability after bonding in traditional equipment. To better enable those skilled in the art to fully understand and implement this invention, the specific implementation principle is further explained below in conjunction with a specific application scenario.

[0030] In actual operation, the elastic elastic band of the underwear to be bonded is first placed on the conveyor belt 51 of the conveyor mechanism 5. The conveyor belt 51 is driven by the servo motor 53 and driven by the transmission roller 52 to ensure that the material can smoothly enter the various functional areas of the equipment. The guide plate 54 is fixed to the inner wall of the main frame 1 and is located on both sides of the conveyor belt 51. It is used to limit the position of the material and prevent it from shifting during the transmission process, thereby ensuring the accuracy of subsequent processes.

[0031] When the material enters the heating assembly 2, the heating plate 21 generates heat after being energized, and this heat is evenly transferred to the material surface through the thermally conductive silicone layer 22 covering its surface. The thermally conductive silicone layer 22 has a thickness of 2mm to 5mm, and its high thermal conductivity and flexibility effectively prevent uneven heat distribution. Simultaneously, the hot air channel 24 introduces hot air through an external hot air blower, which is evenly blown onto the material surface from multiple angled air outlets, further ensuring consistent heating of the material. The temperature sensor 23 monitors the operating temperature of the heating plate 21 in real time and feeds the data back to the control system, allowing for dynamic adjustment of the heating power according to the set value, thereby achieving precise control of the heating process.

[0032] Subsequently, the material enters the tension adjustment assembly 3. The two ends of the adjustment roller 31 are rotatably connected to the main frame 1 via bearings. The rubber layer covering its surface increases friction with the material to prevent slippage. A pressure sensor 32 is fixed to one end of the adjustment roller 31, detecting the pressure value on the material in real time and transmitting the signal to the control system. The control system adjusts the speed of the drive motor 33 according to the preset tension value. The drive motor 33 drives the adjusting screw 36 to rotate via a coupling, pushing the slider 35 to move along the sliding track 34, thereby changing the distance between the adjustment rollers 31. This process achieves dynamic adjustment of the material tension, ensuring that it maintains a constant tension state during the bonding process and avoiding deformation or poor bonding caused by tension fluctuations.

[0033] Next, the material enters the cooling and shaping assembly 4. Cooling water channels 42 inside the cooling plate 41 continuously reduce the temperature of the cooling plate 41 through an external circulating water cooling system, thereby rapidly cooling the bonded material. A fan assembly 43 is installed above the cooling plate 41, using multiple small fans to accelerate airflow and further improve cooling efficiency. The shaping roller 44 is located at the rear end of the cooling plate 41; its surface is coated with an anti-stick coating to effectively prevent material adhesion, while simultaneously flattening the cooled material to ensure a flat and dimensionally stable bonding surface. The dual effects of cooling and shaping significantly improve bonding quality and solve the dimensional deviation problem caused by insufficient cooling in traditional equipment.

[0034] Finally, the cooled and shaped material is output via conveyor belt 51, completing the entire bonding process. Servo motor 53 provides precise power output to ensure smooth operation of conveyor belt 51, while guide plate 54 continues to play a limiting role to prevent material from shifting during output.

[0035] Through the synergistic effect of the aforementioned components, this invention achieves high-quality thermal bonding of elastic bandages for underwear. The thermally conductive silicone layer 22 and hot air channel 24 in heating component 2 ensure uniform heating of the material. The adjusting roller 31, pressure sensor 32, and drive motor 33 in tension adjustment component 3 achieve precise control of material tension. The cooling plate 41, cooling water channel 42, and fan assembly 43 in cooling and shaping component 4 significantly improve cooling efficiency and shaping effect. The servo motor 53 and guide plate 54 in conveying mechanism 5 ensure the stability of the material during transmission. These designs collectively solve the problems of uneven heating, insufficient tension control, and poor dimensional stability after bonding in existing technologies, meeting the requirements for high-quality bonding of elastic bandages for underwear.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A heat-bonding machine for elastic waistbands in underwear, characterized in that, The device includes a main frame (1), a heating component (2), a tension adjustment component (3), a cooling and shaping component (4), and a conveying mechanism (5). The heating component (2) is installed inside the main frame (1). The tension adjustment component (3) is located at the rear end of the heating component (2). The output end of the tension adjustment component (3) is connected to the cooling and shaping component (4). The conveying mechanism (5) is installed at the bottom of the main frame (1) and passes through the heating component (2), the tension adjustment component (3), and the cooling and shaping component (4).

2. The heat bonding machine for elastic waistbands in underwear according to claim 1, characterized in that, The heating component (2) includes a heating plate (21), a thermally conductive silicone layer (22), a temperature sensor (23), and a hot air channel (24). The heating plate (21) is symmetrically installed on the inner wall of the main frame (1). The surface of the heating plate (21) is covered with a thermally conductive silicone layer (22). The thickness of the thermally conductive silicone layer (22) is 2mm to 5mm. The temperature sensor (23) is embedded inside the heating plate (21). A hot air channel (24) is provided on the rear side of the heating plate (21). The inlet end of the hot air channel (24) is connected to an external hot air blower, and the outlet end is provided with multiple evenly distributed air outlets.

3. The heat bonding machine for elastic waistbands in underwear according to claim 1, characterized in that, The tension adjustment assembly (3) includes an adjustment roller (31), a pressure sensor (32), a drive motor (33), and a sliding rail (34). The adjustment roller (31) is symmetrically installed inside the main frame (1). The two ends of the adjustment roller (31) are rotatably connected to the main frame (1) through bearings. The surface of the adjustment roller (31) is covered with a rubber layer. One end of the adjustment roller (31) is fixedly connected to a pressure sensor (32). A sliding rail (34) is provided below the adjustment roller (31). A slider (35) is slidably connected inside the sliding rail (34). The top of the slider (35) is connected to an adjustment screw (36) through a thread. One end of the adjustment screw (36) is fixedly connected to a drive motor (33).

4. The heat bonding machine for elastic tightening bands in underwear according to claim 1, characterized in that, The cooling and shaping assembly (4) includes a cooling plate (41), a cooling water channel (42), a fan assembly (43), and a shaping roller (44). The cooling plate (41) is installed inside the main frame (1). The cooling plate (41) has a cooling water channel (42) inside. The inlet and outlet ends of the cooling water channel (42) are connected to an external circulating water cooling system, respectively. The fan assembly (43) is arranged above the cooling plate (41). The shaping roller (44) is arranged at the rear end of the cooling plate (41). The two ends of the shaping roller (44) are rotatably connected to the main frame (1) through bearings.

5. A heat-bonding machine for elastic waistbands in underwear according to claim 1, characterized in that, The conveying mechanism (5) includes a conveyor belt (51), a transmission roller (52), a servo motor (53), and a guide plate (54). The conveyor belt (51) is installed at the bottom of the main frame (1). The two ends of the conveyor belt (51) are rotatably connected to the main frame (1) through the transmission roller (52). One end of the transmission roller (52) is connected to the servo motor (53) through a coupling. Guide plates (54) are provided on both sides of the conveyor belt (51).

6. A heat-bonding machine for elastic waistbands in underwear according to claim 2, characterized in that, The outlet of the hot air channel (24) is designed at an inclined angle to blow hot air evenly onto the surface of the material to be bonded.

7. A heat-bonding machine for elastic waistbands in underwear according to claim 3, characterized in that, The drive motor (33) is fixed to the outer wall of the main frame (1) by a bracket. The drive motor (33) drives the adjusting screw (36) to rotate so as to push the slider (35) to move along the sliding track (34).

8. A heat-bonding machine for elastic waistbands in underwear according to claim 4, characterized in that, The surface of the shaping roller (44) is coated with an anti-stick coating to prevent material adhesion.

9. A heat-bonding machine for elastic waistbands in underwear according to claim 5, characterized in that, The guide plate (54) is fixed to the inner wall of the main frame (1) by bolts to limit the position of the material and prevent it from shifting.

10. A heat-bonding machine for elastic waistbands in underwear according to claim 4, characterized in that, The fan assembly (43) consists of multiple small fans, each of which is connected to a power source via a wire to accelerate airflow.

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