Traceless underwear gluing machine with adhesive tape preheating function

Abstract

The utility model relates to the technical field of gluing machines, in particular to a traceless underwear gluing machine with an adhesive tape preheating function, which comprises a working table, a gluing mechanism arranged at the top of the working table, a discharging circular table which is arranged at the top of the working table and can rotate, and a positioning device which is arranged at the top of the working table and is used for pressing materials, tooth grooves are formed in the edge of the upper end face of the discharging circular truncated cone. The positioning device comprises a plurality of limiting sleeves vertically fixed to the top of the workbench, and the limiting sleeves are arranged around the center axis of the discharging circular truncated cone at equal intervals. A sliding rod capable of longitudinally moving is arranged in the limiting sleeve, a spline shaft capable of rotating is arranged in the sliding rod in a penetrating mode, and a first bevel gear is fixed to the top end of the spline shaft; a driven shaft capable of rotating is horizontally arranged on one side of the top end of the sliding rod. According to the circular arc edge gluing machine, the pressing roller and the discharging circular table are matched to drive underwear to rotate, and the problem that the gluing machine cannot complete circular arc edge gluing operation is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bonding machines, in particular to a seamless underwear bonding machine with a tape preheating function. Background Art

[0002] The seamless underwear bonding machine is an advanced equipment specially used for producing seamless underwear. It uses high-precision heating and pressing technology to seamlessly bond two or more pieces of underwear fabrics together. This equipment uses an advanced control system that can accurately control the heating temperature and pressing time to ensure that the bonding effect is firm and the fabric does not deform. The emergence of the seamless underwear bonding machine has greatly improved the production efficiency and product quality of seamless underwear, making the popularity of seamless underwear in the market continue to increase. At the same time, the equipment is simple to operate and easy to maintain, and is one of the important equipment that is indispensable to underwear production companies.

[0003] The patent of China's authorization announcement number CN205321329U discloses a seamless underwear gluing and bonding machine, including a bracket, a workbench and a machine head, the machine head is fixed on the workbench, the machine head includes a lower machine head, a connecting part and an upper machine head, a lower transmission belt device is arranged on the left side of the lower machine head, an upper transmission belt device is arranged above the lower transmission belt device, a power device is arranged at the right end of the rear side of the machine head, the power device drives the upper transmission belt device and the lower transmission belt device respectively through the upper and lower transmission shafts, the upper transmission belt device is fixed to the bottom of the left side of the upper machine head, a tape width adjustment plate is arranged at the front part of the upper transmission belt device, a main heating device is arranged on the right side of the upper transmission belt device, an active air nozzle is arranged on the main heating device, and a tape rack and a tension adjustment mechanism are also arranged on the top of the upper machine head above the upper transmission belt device; the seamless underwear gluing and bonding machine is designed to have a structure similar to a sewing machine head, the machine is small in size, easy to operate, and is very suitable for the gluing operation of seamless underwear.

[0004] The seamless underwear gluing and bonding machine in the above patent document uses an upper conveyor belt device and a lower conveyor belt device, which can usually only move the fabric in a straight line direction. As a result, the seamless underwear gluing and bonding machine cannot bond along the curved edge of the underwear during the actual production process. Therefore, a seamless underwear bonding machine with a tape preheating function is proposed. Utility Model Content

[0005] In view of the above problems, a seamless underwear bonding machine with a tape preheating function is provided. The longitudinal driving mechanism drives the slide bar to move longitudinally, so that the slide bar drives the dynamic pressure roller set on the top to move synchronously and press on the underwear, and at the same time, the toothed belt set on the pressure roller engages with the tooth groove. Then, when the spline shaft is driven to rotate by the rotary driving mechanism, the spline shaft drives the first bevel gear to synchronously drive the second bevel gear to rotate, and the second bevel gear drives the pressure roller to rotate synchronously through the driven shaft. At the same time, the toothed belt set on the pressure roller drives the discharge round table to rotate synchronously through the tooth groove. The pressure roller and the discharge round table cooperate to drive the underwear to rotate, solving the problem that the bonding machine cannot complete the arc edge gluing operation.

[0006] In order to solve the problems of the prior art, the present application provides a seamless underwear bonding machine with a tape preheating function, comprising a workbench, a bonding mechanism arranged on the top of the workbench, a material discharge round table arranged on the top of the workbench and capable of rotating, and a positioning device arranged on the top of the workbench for pressing materials, wherein a tooth groove is arranged at the edge of the upper end surface of the material discharge round table; the positioning device comprises a plurality of limit sleeves vertically fixed to the top of the workbench, and the limit sleeves are arranged equidistantly around the central axis of the material discharge round table; a sliding rod capable of longitudinal movement is arranged inside the limit sleeve, a spline shaft capable of rotating is arranged through the inside of the sliding rod, and a first bevel gear is fixed to the top of the spline shaft; a driven shaft capable of rotating is horizontally arranged on one side of the top of the sliding rod, a second bevel gear capable of meshing with the first bevel gear is fixed to one end of the driven shaft, a material pressing roller is sleeved on the outside of the driven shaft, and a toothed belt meshing with the tooth groove is arranged on the outside of one end of the material pressing roller; a rotation driving mechanism for driving the spline shaft to rotate is arranged at the bottom of the workbench; a longitudinal driving mechanism for driving the sliding rod to move longitudinally is also arranged at the bottom of the workbench.

[0007] As a technical solution of the present application, a shell is provided on the lower end surface of the workbench, a plurality of fixing seats are installed on the inner wall of the shell, and a third bevel gear is rotatably installed on the bottom of the fixing seat.

[0008] As a technical solution of the present application, an adapting hole capable of adapting to the spline shaft is provided at the center of the third bevel gear; the spline shaft can be inserted into the adapting hole.

[0009] As a technical solution of the present application, the rotary drive mechanism includes a mounting base fixed on the lower end surface of the workbench, a second servo motor is fixed on the upper end surface of the mounting base, and a fourth bevel gear is fixed at the output end of the second servo motor; a transmission shaft is horizontally arranged on the side of the fourth bevel gear, and fifth bevel gears are respectively fixed at both ends of the transmission shaft, and the fifth bevel gear is respectively meshed with the third bevel gear and the fourth bevel gear.

[0010] As a technical solution of the present application, the longitudinal driving mechanism includes a bracket fixed to the side of the sliding rod, and a threaded sleeve is arranged on the bracket; the longitudinal driving mechanism also includes a first servo motor fixed inside the shell, and a rotatable threaded rod is vertically arranged at the output end of the first servo motor, and the threaded rod is threadedly connected to the threaded sleeve.

[0011] As a technical solution of the present application, the bonding mechanism includes a support fixed to the top of the workbench, a material unloading rack is fixed on one side of the top of the support, and a material unloading roller for unloading is arranged on the inner side of the material unloading rack; a material receiving rack is fixed on the other side of the top of the support, and a material receiving roller for winding up the excess material is arranged on the inner side of the material receiving rack; a glue pressing roller capable of longitudinal movement is arranged on the side of the support facing the material unloading truncated table, and a hydraulic telescopic assembly for driving the glue pressing roller to move longitudinally is arranged longitudinally on the top of the support, and a moving frame is fixed on the output end of the hydraulic telescopic assembly, and the glue pressing roller is rotatably installed on the inner side of the moving frame.

[0012] As a technical solution of the present application, a heater is fixed on the side of the support away from the rubber pressing roller, and two groups of heating blocks are provided at the working end of the heater. The heating blocks penetrate two opposite sides of the support and heat both sides of the tape.

[0013] As a technical solution of the present application, a mounting shaft is horizontally arranged below the material discharging rack on the side of the workbench close to the rubber pressing roller, and a rotatable limiting roller is arranged outside the mounting shaft.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the utility model utilizes a longitudinal drive mechanism to drive the slide bar to move longitudinally, and the slide bar drives the driven shaft arranged on the top to move longitudinally, and at the same time the driven shaft drives the press roller to move synchronously, so that the bottom of the press roller is pressed on the underwear and fixes it. At the same time, the toothed belt arranged on the press roller will mesh with the tooth groove. When the rotary drive mechanism drives the spline shaft to rotate, the first bevel gear arranged on the spline shaft will synchronously drive the second bevel gear to rotate, and the second bevel gear drives the press roller to rotate synchronously through the driven shaft. At the same time, the toothed belt arranged on the press roller drives the discharge round table to rotate synchronously through the tooth groove. The press roller and the discharge round table cooperate to drive the underwear to rotate, and the problem that the bonding machine cannot complete the arc edge gluing operation is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a stereoscopic diagram of a seamless underwear bonding machine with a tape preheating function;

[0016] Figure 2 It is a partial cross-sectional view of a workbench in a seamless underwear bonding machine with a tape preheating function;

[0017] Figure 3 It is a stereoscopic diagram of the bonding mechanism in a seamless underwear bonding machine with a tape preheating function;

[0018] Figure 4 It is a three-dimensional diagram of the longitudinal drive mechanism in a seamless underwear bonding machine with a tape preheating function;

[0019] Figure 5 It is a stereoscopic diagram of a rotary drive mechanism in a seamless underwear bonding machine with a tape preheating function;

[0020] Figure 6 It is an exploded view of a fixing seat in a seamless underwear bonding machine with a tape preheating function;

[0021] Figure 7 yes Figure 2 Enlarged view of point A in .

[0022] The numbers in the figure are: 1, workbench; 2, bonding mechanism; 21, support; 22, heater; 221, heating block; 23, unloading rack; 231, unloading roller; 24, receiving rack; 241, receiving roller; 25, rubber pressing roller; 26, hydraulic telescopic assembly; 261, moving rack; 27, mounting shaft; 271, limiting roller; 3, unloading round table; 31, tooth groove; 4, positioning device; 41, limiting sleeve; 42, slide rod; 43, spline shaft; 44, first conical gear Wheel; 45, driven shaft; 46, second bevel gear; 47, pressure roller; 471, toothed belt; 5, housing; 51, fixed seat; 52, third bevel gear; 521, adapter hole; 6, longitudinal drive mechanism; 61, first servo motor; 611, threaded rod; 62, bracket; 621, threaded sleeve; 7, rotary drive mechanism; 71, mounting seat; 72, second servo motor; 73, fourth bevel gear; 74, transmission shaft; 741, fifth bevel gear. DETAILED DESCRIPTION

[0023] In order to further understand the features, technical means and specific purposes and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Figure 1-Figure 7As shown, a seamless underwear bonding machine with a tape preheating function comprises a workbench 1, a bonding mechanism 2 arranged on the top of the workbench 1, a material discharge round table 3 arranged on the top of the workbench 1 and capable of rotating, and a positioning device 4 arranged on the top of the workbench 1 for pressing materials, wherein a tooth groove 31 is arranged at the edge of the upper end surface of the material discharge round table 3; the positioning device 4 comprises a plurality of limiting sleeves 41 vertically fixed to the top of the workbench 1, and the limiting sleeves 41 are arranged equidistantly around the central axis of the material discharge round table 3; a sliding rod 42 capable of longitudinal movement is arranged inside the limiting sleeve 41, and a A rotatable spline shaft 43, a first bevel gear 44 is fixed to the top of the spline shaft 43; a rotatable driven shaft 45 is horizontally arranged on one side of the top of the slide bar 42, a second bevel gear 46 that can mesh with the first bevel gear 44 is fixed to one end of the driven shaft 45, a pressing roller 47 is sleeved on the outside of the driven shaft 45, and a toothed belt 471 that meshes with the tooth groove 31 is arranged on the outside of one end of the pressing roller 47; a rotating drive mechanism 7 for driving the spline shaft 43 to rotate is arranged at the bottom of the workbench 1; a longitudinal drive mechanism 6 for driving the slide bar 42 to move longitudinally is also arranged at the bottom of the workbench 1.

[0024] When the longitudinal drive mechanism 6 drives the slide bar 42 downward along the central axis of the limiting sleeve 41, the slide bar 42 causes the press roller 47 to move downward synchronously through the driven shaft 45 until the bottom of the press roller 47 contacts the underwear and presses the edge of the underwear. At this time, the toothed belt 471 provided at one end of the press roller 47 is meshed with the toothed groove 31 provided at the top of the discharge round table 3. Further, when the rotary drive mechanism 7 drives the spline shaft 43 to rotate, the first bevel gear 44 installed on the spline shaft 43 synchronously drives the second bevel gear 46 to rotate. The second bevel gear 46 drives the press roller 47 to rotate through the driven shaft 45, and at the same time, the toothed belt 471 on the press roller 47 drives the discharge round table 3 to rotate synchronously through the toothed groove 31. In this process, the press roller 47 and the discharge round table 3 jointly drive the underwear to rotate through the cooperation of the toothed belt 471 and the toothed groove 31. When the longitudinal driving mechanism 6 drives the slide bar 42 to move upward along the inside of the limiting sleeve 41, the slide bar 42 drives the pressing roller 47 to move upward synchronously through the driven shaft 45, so that the pressing roller 47 is separated from the underwear. At the same time, the toothed belt 471 at one end of the pressing roller 47 is separated from the tooth groove 31, causing the unloading circular table 3 to stop rotating, thereby facilitating the removal of the underwear.

[0025] See also Figure 6 As shown, a shell 5 is provided on the lower end surface of the workbench 1 , a plurality of fixing seats 51 are installed on the inner wall of the shell 5 , and a third bevel gear 52 is rotatably installed at the bottom of the fixing seat 51 .

[0026] In order to ensure the stable operation of the third bevel gear 52, a number of fixing seats 51 matching the number of the positioning device 4 are fixed on the inner wall of the housing 5. Then, the third bevel gear 52 is rotatably mounted on the bottom of each fixing seat 51 to ensure that the third bevel gear 52 can always maintain a correct meshing position with the fifth bevel gear 741. Stable transmission between the fifth bevel gear 741 and the third bevel gear 52 is achieved.

[0027] See also Figure 5 and Figure 6 As shown, an adapting hole 521 capable of adapting to the spline shaft 43 is provided at the center of the third bevel gear 52 ; the spline shaft 43 can be inserted into the adapting hole 521 .

[0028] In order to realize that the third bevel gear 52 can stably drive the spline shaft 43 to rotate, an adapting hole 521 adapted to the spline shaft 43 is opened at the center of the third bevel gear 52. When the slide bar 42 moves longitudinally, the slide bar 42 will simultaneously drive the spline shaft 43 to move longitudinally along the central axis direction of the adapting hole 521. It is ensured that while the spline shaft 43 is adjusting its position longitudinally, it can still maintain effective rotation transmission with the spline shaft 43 through the adapting hole 521. The stable transmission relationship between the third bevel gear 52, the slide bar 42 and the spline shaft 43 is effectively guaranteed.

[0029] See also Figure 5 As shown, the rotary drive mechanism 7 includes a mounting base 71 fixed to the lower end surface of the workbench 1, a second servo motor 72 is fixed to the upper end surface of the mounting base 71, and a fourth bevel gear 73 is fixed to the output end of the second servo motor 72; a transmission shaft 74 is horizontally arranged beside the fourth bevel gear 73, and fifth bevel gears 741 are respectively fixed at both ends of the transmission shaft 74, and the fifth bevel gear 741 is respectively meshed with the third bevel gear 52 and the fourth bevel gear 73.

[0030] When the second servo motor 72 is started, the output end of the second servo motor 72 drives the fourth bevel gear 73 to start rotating. Subsequently, the fourth bevel gear 73 is meshed with the fifth bevel gear 741 at one end of the transmission shaft 74, and drives the transmission shaft 74 to rotate synchronously. While the transmission shaft 74 is rotating, another fifth bevel gear 741 connected to the other end of the transmission shaft 74 away from the fourth bevel gear 73 also starts to rotate and drives the third bevel gear 52 to rotate synchronously. Finally, the third bevel gear 52 drives the spline shaft 43 to rotate together through the adapter hole 521, thereby realizing the effective operation of the entire transmission chain.

[0031] See also Figure 4As shown, the longitudinal drive mechanism 6 includes a bracket 62 fixed to the side of the sliding rod 42, and a threaded sleeve 621 is arranged on the bracket 62; the longitudinal drive mechanism 6 also includes a first servo motor 61 fixed inside the shell 5, and a rotatable threaded rod 611 is vertically arranged at the output end of the first servo motor 61, and the threaded rod 611 is threadedly connected with the threaded sleeve 621.

[0032] When the first servo motor 61 is started, the output end of the first servo motor 61 drives the threaded rod 611 to start rotating. The threaded rod 611 rotates while driving the threaded sleeve 621 to move longitudinally. The specific process is as follows: When the threaded sleeve 621 drives the slide bar 42 to move upward synchronously along the central axis of the limit sleeve 41 through the connecting bracket 62. At this time, the pressing roller 47 on the top of the slide bar 42 also moves upward synchronously until the pressing roller 47 is completely separated from the underwear, which is convenient for the underwear to be taken and placed. On the contrary, when the first servo motor 61 drives the threaded sleeve 621 downward through the threaded rod 611, the threaded sleeve 621 drives the slide bar 42 to move downward synchronously through the bracket 62. The pressing roller 47 on the top of the slide bar 42 also moves downward synchronously until the pressing roller 47 presses the edge of the underwear. The pressing roller 47 effectively fixes the underwear, providing stable underwear positioning for subsequent processing steps.

[0033] See also Figure 3 As shown, the bonding mechanism 2 includes a support 21 fixed to the top of the workbench 1, a material discharge rack 23 is fixed to one side of the top of the support 21, and a material discharge roller 231 for discharging material is arranged on the inner side of the material discharge rack 23; a material collection rack 24 is fixed to the other side of the top of the support 21, and a material collection roller 241 for winding up the remaining material is arranged on the inner side of the material collection rack 24; a glue pressing roller 25 capable of longitudinal movement is arranged on the side of the support 21 facing the material discharge round table 3, and a hydraulic telescopic component 26 for driving the glue pressing roller 25 to move longitudinally is arranged on the top of the support 21, and a moving frame 261 is fixed to the output end of the hydraulic telescopic component 26, and the glue pressing roller 25 is rotatably installed on the inner side of the moving frame 261.

[0034] First, the unloading roller 231 is rotated and placed on the inner side of the unloading rack 23 to ensure smooth unloading. Subsequently, the adhesive tape is passed around the bottom of the rubber pressing roller 25, and one end of the adhesive tape is firmly wound around the outside of the receiving roller 241, so as to prepare for the subsequent feeding and winding of the adhesive tape. Next, the hydraulic telescopic assembly 26 drives the rubber pressing roller 25 downward through the mobile rack 261. During the downward movement of the rubber pressing roller 25, the adhesive tape at the bottom of the rubber pressing roller 25 contacts the surface of the underwear. This allows the adhesive tape to adhere firmly to the underwear. At the same time, the motor provided on one side of the receiving rack 24 starts to drive the receiving roller 241 to rotate. As the receiving roller 241 rotates, the plastic film of the adhesive tape is gradually wound around the receiving roller 241. During the winding process of the tape film, the rotation of the receiving roller 241 also realizes the continuous feeding of the adhesive tape, ensuring the continuity and stability of the bonding process.

[0035] See also Figure 3 As shown, a heater 22 is fixed to one side of the support 21 away from the adhesive pressing roller 25 , and two groups of heating blocks 221 are provided at the working end of the heater 22 . The heating blocks 221 penetrate two opposite sides of the support 21 and heat both sides of the adhesive tape.

[0036] When the adhesive tape enters the area between the two sets of heating blocks 221, the heating block 221 at the working end of the heater 22 starts to generate heat by starting the heater 22. The heating block 221 evenly and efficiently heats both sides of the adhesive tape, thereby improving the bonding efficiency between the adhesive tape and the underwear, ensuring that the bonding effect meets the expected technical requirements, and effectively improving the bonding quality and stability between the adhesive tape and the underwear.

[0037] See also Figure 3 As shown, a mounting shaft 27 is horizontally arranged below the unloading rack 23 on one side of the workbench 1 close to the glue pressing roller 25 , and a rotatable limiting roller 271 is arranged outside the mounting shaft 27 .

[0038] During the feeding process of the adhesive tape, in order to ensure that the adhesive tape can accurately enter the heating area, the adhesive tape is passed around the outside of the limiting roller 271 in a clockwise direction. The guidance of the limiting roller 271 changes the moving track of the adhesive tape, ensuring that the adhesive tape can smoothly enter the gap between the two sets of heating blocks 221 along the predetermined path. This not only improves the stability and accuracy of the adhesive tape during the feeding process, but also ensures that the adhesive tape can evenly and effectively receive the heating treatment of the heating block 221, thereby improving the efficiency of the subsequent bonding operation.

[0039] The working principle of the utility model is as follows: first, the underwear is placed on the discharge table 3, and the longitudinal drive mechanism 6 drives the slide bar 42 downward along the central axis of the limit sleeve 41, so that the pressing roller 47 presses the edge of the underwear. At this time, the toothed belt 471 at one end of the pressing roller 47 is meshed with the tooth groove 31 at the top of the discharge table 3, providing power for the subsequent rotation of the underwear. When the second servo motor 72 is started, the output end of the second servo motor 72 drives the fourth bevel gear 73 to rotate, thereby driving the transmission shaft 74 and the fifth bevel gears 741 at both ends to rotate. One of the fifth bevel gears 741 drives the third bevel gear 52 to rotate through meshing, and the adapter hole 521 in the center of the third bevel gear 52 ensures that the spline shaft 43 can maintain stable rotation transmission while moving longitudinally. The rotation of the spline shaft 43 further drives the pressing roller 47 and the discharge table 3 to rotate synchronously through the driven shaft 45, thereby realizing the rotation positioning of the underwear. During the feeding and bonding stage of the tape, the tape is discharged from the discharge roller 231, bypasses the bottom of the pressure roller 25, and is firmly wound around the outside of the receiving roller 241. The hydraulic telescopic assembly 26 drives the pressure roller 25 downward, so that the tape contacts and bonds with the underwear. At the same time, the rotation of the receiving roller 241 realizes the continuous feeding of the tape, ensuring the continuity and stability of the bonding process. To ensure that the tape can accurately enter the heating area, the tape bypasses the outside of the limiting roller 271 in a clockwise direction and enters between the two groups of heating blocks 221 through the guidance of the limiting roller 271. After the heater 22 is started, the heating block 221 evenly heats both sides of the tape to improve the bonding efficiency and quality between the tape and the underwear. Finally, when the bonding process is completed, the longitudinal drive mechanism 6 drives the slide bar 42 upward, so that the pressure roller 47 is separated from the underwear, and the toothed belt 471 is separated from the tooth groove 31, and the discharge round table 3 stops rotating, which is convenient for removing the underwear.

[0040] The above embodiments only express one or several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the attached claims.

Claims

1. A seamless underwear bonding machine with a tape preheating function, comprising a workbench (1), a bonding mechanism (2) arranged on the top of the workbench (1), a rotatable material discharge table (3) arranged on the top of the workbench (1), and a positioning device (4) arranged on the top of the workbench (1) for pressing the material, characterized in that: A tooth groove (31) is arranged at the edge of the upper end surface of the discharge round table (3); the positioning device (4) comprises a plurality of limit sleeves (41) vertically fixed to the top of the workbench (1), and the limit sleeves (41) are arranged equidistantly around the central axis of the discharge round table (3); a slide bar (42) capable of longitudinal movement is arranged inside the limit sleeve (41), a spline shaft (43) capable of rotation is arranged inside the slide bar (42), and a first bevel gear (44) is fixed at the top of the spline shaft (43); one side of the top of the slide bar (42) is horizontally arranged A driven shaft (45) capable of rotating is provided, a second bevel gear (46) capable of meshing with a first bevel gear (44) is fixed to one end of the driven shaft (45), a pressing roller (47) is sleeved on the outside of the driven shaft (45), and a toothed belt (471) meshing with a tooth groove (31) is provided on the outside of one end of the pressing roller (47); a rotating driving mechanism (7) for driving the spline shaft (43) to rotate is provided at the bottom of the workbench (1); and a longitudinal driving mechanism (6) for driving the slide bar (42) to move longitudinally is also provided at the bottom of the workbench (1).

2. The seamless underwear bonding machine with tape preheating function according to claim 1, characterized in that: The lower end surface of the workbench (1) is provided with a housing (5), a plurality of fixing seats (51) are mounted on the inner wall of the housing (5), and a third bevel gear (52) is rotatably mounted on the bottom of the fixing seat (51).

3. The seamless underwear bonding machine with tape preheating function according to claim 2, characterized in that: An adapting hole (521) capable of adapting to a spline shaft (43) is provided at the center of the third bevel gear (52); the spline shaft (43) can be inserted into the adapting hole (521).

4. The seamless underwear bonding machine with tape preheating function according to claim 2, characterized in that: The rotary drive mechanism (7) comprises a mounting seat (71) fixed to the lower end surface of the workbench (1); a second servo motor (72) is fixed to the upper end surface of the mounting seat (71); a fourth bevel gear (73) is fixedly arranged at the output end of the second servo motor (72); a transmission shaft (74) is horizontally arranged beside the fourth bevel gear (73); fifth bevel gears (741) are respectively fixed at both ends of the transmission shaft (74); and the fifth bevel gear (741) is respectively meshed with the third bevel gear (52) and the fourth bevel gear (73).

5. The seamless underwear bonding machine with tape preheating function according to claim 1, characterized in that: The longitudinal drive mechanism (6) comprises a bracket (62) fixed to a side of the slide rod (42), and a threaded sleeve (621) is arranged on the bracket (62); the longitudinal drive mechanism (6) further comprises a first servo motor (61) fixed inside the housing (5), and a rotatable threaded rod (611) is vertically arranged at the output end of the first servo motor (61), and the threaded rod (611) is threadedly connected to the threaded sleeve (621).

6. The seamless underwear bonding machine with tape preheating function according to claim 1, characterized in that: The bonding mechanism (2) comprises a support (21) fixed to the top of the workbench (1); a material discharge rack (23) is fixed to one side of the top of the support (21); a material discharge roller (231) for discharging material is arranged on the inner side of the material discharge rack (23); a material collection rack (24) is fixed to the other side of the top of the support (21); a material collection roller (241) for winding up surplus material is arranged on the inner side of the material collection rack (24); a rubber pressing roller (25) capable of longitudinal movement is arranged on the side of the support (21) facing the material discharge round table (3); a hydraulic telescopic assembly (26) for driving the rubber pressing roller (25) to move longitudinally is arranged on the top of the support (21); a moving rack (261) is fixed to the output end of the hydraulic telescopic assembly (26); and the rubber pressing roller (25) is rotatably mounted on the inner side of the moving rack (261).

7. The seamless underwear bonding machine with tape preheating function according to claim 6, characterized in that: A heater (22) is fixed on the side of the support (21) away from the rubber pressing roller (25), and two groups of heating blocks (221) are provided at the working end of the heater (22). The heating blocks (221) penetrate two opposite side surfaces of the support (21) and heat both sides of the adhesive tape.

8. The seamless underwear bonding machine with tape preheating function according to claim 6, characterized in that: A mounting shaft (27) is horizontally arranged below the material unloading rack (23) on one side of the workbench (1) close to the rubber pressing roller (25), and a rotatable limiting roller (271) is arranged outside the mounting shaft (27).

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