An automatic welding device for sealing strip of washing machine

Abstract

The application relates to the technical field of sealing strip welding equipment, in particular to a washing machine sealing strip automatic welding device which comprises a sealing strip unwinding mechanism, a sealing strip cutting mechanism and a welding mechanism for butt welding the two ends of the cut sealing strip arranged in sequence along the sealing strip conveying direction; the welding mechanism comprises a first clamping assembly and a second clamping assembly for clamping the two ends of the sealing strip respectively; a butt driving assembly is used for driving the first clamping assembly and the second clamping assembly to rotate and butt; a hot melt adhesive tape feeding assembly is used for feeding the hot melt adhesive tape between the first clamping assembly and the second clamping assembly; and a hot melt adhesive tape heating assembly is used for heating the hot melt adhesive tape. The application has the effects of realizing automatic butt welding of the two ends of the sealing strip and stably improving the production efficiency and the product qualification rate.

Description

Technical Field

[0001] This application relates to the technical field of sealing strip welding equipment, and in particular to an automatic welding device for washing machine sealing strips. Background Technology

[0002] Currently, the traditional manufacturing process for round sealing strips used in home appliances such as washing machines mainly involves injection molding. However, injection molding has drawbacks such as high mold costs, long molding cycles, and low production efficiency. In particular, different specifications of sealing strips require mold replacement, further increasing production input and changeover time, resulting in higher overall manufacturing costs.

[0003] To reduce production costs, some companies have experimented with extrusion molding to first create long strips of sealing strips, then cutting them into the required lengths. Each strip is then manually joined at both ends, glued, and bonded using heat or hot melt adhesive tape to form a circular sealing ring. While this manual bonding method reduces mold investment to some extent, in mass production, manual operation is not only labor-intensive and inefficient, but also prone to problems such as uneven sealing ring joints, insufficient bonding strength, or dimensional deviations due to variations in bonding strength, alignment accuracy, and glue application among different operators. This results in lower product yield and fails to meet the demands of large-scale, high-quality production.

[0004] Therefore, there is an urgent need to provide a device that can automatically cut sealing strips and automatically press-weld both ends to improve production efficiency and product consistency, and reduce labor costs. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides an automatic welding device for washing machine sealing strips, which has the advantages of automatically welding the two ends of the sealing strip, thereby steadily improving production efficiency and product qualification rate.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: An automatic welding device for a washing machine sealing strip includes a sealing strip unwinding mechanism, a sealing strip cutting mechanism, and a welding mechanism for pressing and welding the two ends of the cut sealing strip, arranged sequentially along the sealing strip conveying direction. The welding mechanism includes a first clamping assembly and a second clamping assembly that respectively clamp both ends of the sealing strip; A pressure-driving assembly is used to drive the first clamping assembly and the second clamping assembly to rotate and apply pressure. A hot melt adhesive tape supply assembly is used to supply hot melt adhesive tape between a first clamping assembly and a second clamping assembly; And a hot melt adhesive tape heating assembly for heating the hot melt adhesive tape.

[0007] To achieve the above technical solution, the sealing strip unwinding mechanism automatically releases the sealing strip, the sealing strip cutting mechanism cuts it, the first clamping component and the second clamping component clamp the two ends of the cut sealing strip respectively, the hot melt adhesive tape supply component supplies hot melt adhesive tape between the two ends, the hot melt adhesive tape heating component heats the tape to melt it, and the pressure driving component drives the first clamping component and the second clamping component to rotate and press, so that the two ends are bonded together by the hot melt adhesive tape. Through the continuous automated actions of unwinding, cutting, clamping, adhesive supply, heating and pressing, no manual intervention is required for cutting, positioning, applying adhesive and pressing the sealing strip, which fundamentally solves the problems of low efficiency, inaccurate positioning and uneven adhesion of manual operation, realizes automatic butt welding of the two ends of the sealing strip, and steadily improves production efficiency and product qualification rate.

[0008] As a preferred embodiment of this application, the pressure driving assembly includes a rotary driving member for driving the first clamping assembly to revolve and rotate, and a clamping driving member for driving the second clamping assembly to translate.

[0009] To achieve the above technical solution, the rotary drive drives the first clamping assembly to revolve and rotate, causing the end of the sealing strip held by the first clamping assembly to turn towards the end held by the second clamping assembly and become opposite to it; the pressing drive drives the second clamping assembly to translate and press it towards the first clamping assembly; through the action of revolving and rotating, one end of the sealing strip is changed from the conveying direction to the direction opposite to the other end, and then the two ends are actively pressed together by translation and pressing. This action principle avoids manually flipping the sealing strip or complex posture adjustment, ensures accurate docking angle and controllable pressing force, and makes the bonding interface flat and firm.

[0010] As a preferred embodiment of this application, the rotary drive includes a mounting frame, a main rotating shaft rotatably mounted on the mounting frame, a swing arm fixed on the main rotating shaft, a driven shaft rotatably mounted on the swing arm, a mounting platform mounted on the driven shaft, a first clamping assembly mounted on the mounting platform, and a drive motor for driving the main rotating shaft to rotate mounted on the mounting frame. The swing arm is rotatably equipped with a secondary shaft, on which a secondary gear is fixedly mounted. A main gear is sleeved on the main shaft, and the secondary gear meshes with the main gear. The main gear is fixedly mounted relative to the mounting bracket. A drive gear is mounted on the secondary shaft, and a driven gear is mounted on the secondary shaft. The drive gear and the driven gear are connected by a gear belt for mutual transmission.

[0011] To achieve the above technical solution, a drive motor drives the main shaft to rotate, which in turn drives the swing arm to rotate, causing the mounting platform and the first clamping assembly to revolve. The main gear is fixed relative to the mounting frame and does not rotate. When the swing arm revolves, the secondary gear meshes with the main gear and rotates, causing the secondary shaft to rotate. The drive gear on the secondary shaft drives the driven gear on the secondary shaft to rotate via a gear belt, thus causing the mounting platform and the first clamping assembly to rotate. By setting the transmission ratio, the first clamping assembly revolves to the side of the second clamping assembly while simultaneously rotating 180° on its own axis. By coupling the revolution and rotation motions under a single drive source, the action synchronization is high, and no additional motor or sensor is needed to control the rotation angle. This ensures that the end of the sealing strip automatically completes a 180° turn when it reaches the pressure position, simplifying the control logic and improving the reliability and repeatability of the rotation positioning.

[0012] As a preferred embodiment of this application, the clamping drive includes a clamping mounting frame, a slide rail on the clamping mounting frame, a clamping platform on the slide rail, a second clamping assembly on the clamping platform, and a clamping cylinder on the clamping mounting frame for driving the clamping platform to move along the slide rail.

[0013] To achieve the above technical solution, the clamping cylinder drives the clamping table to move along the slide rail, and the clamping table drives the second clamping component on it to move horizontally towards the first clamping component. Through the translational movement guided by the slide rail, the second clamping component presses against the first clamping component in a straight line, avoiding skewing or shaking, ensuring that the two end faces of the sealing strip are aligned and in contact, and that the clamping force is uniform and adjustable, thereby obtaining stable and consistent welding strength.

[0014] As a preferred embodiment of this application, the clamping mounting frame is provided with a conveyor belt arranged along the conveying direction of the sealing strip and a conveyor motor that drives the conveyor belt to rotate, and the conveyor belt drags the sealing strip forward into the second clamping assembly.

[0015] To achieve the above technical solution, the conveyor motor drives the conveyor belt to rotate, with the top surface of the conveyor belt flush with the bottom surface of the second lower positioning groove. Under the frictional traction of the conveyor belt, the sealing strip automatically moves forward from the first clamping assembly side into the second clamping assembly. Because the sealing strip is relatively flexible, relying solely on subsequent pushing of the sealing strip can easily lead to bending and jamming. The active traction action of the conveyor belt provides continuous and stable forward momentum for the sealing strip, ensuring that the end of the sealing strip can smoothly pass through the entire conveying path and enter the second clamping assembly, improving the smoothness of material feeding and the reliability of automation.

[0016] As a preferred embodiment of this application, the hot melt adhesive tape supply assembly includes an unwinding frame, on which a hot melt adhesive tape unwinding roller, a traction roller, and a transition roller disposed between the hot melt adhesive tape unwinding roller and the traction roller are provided, as well as an unwinding drive motor for driving the traction roller to rotate; the traction roller is disposed on the side of the second clamping assembly away from the sealing strip cutting mechanism.

[0017] To achieve the above technical solution, the unwinding drive motor drives the traction roller to rotate. The traction roller pulls the hot melt adhesive tape out from the hot melt adhesive tape unwinding roller. After being guided by the transition roller, the hot melt adhesive tape falls vertically from the traction roller to the side of the second clamping assembly. Through the rotational unwinding action of the active traction roller, the hot melt adhesive tape is fed at a constant speed and in a fixed quantity. The vertical falling method allows the tape to fall naturally into the gap between the first and second clamping assemblies, eliminating the need for an additional positioning mechanism, avoiding tape deviation or tangling, and ensuring accurate tape positioning before each pressing.

[0018] As a preferred embodiment of this application, the hot melt adhesive tape heating assembly includes a U-shaped electric heating plate disposed on the side of the second clamping assembly and a heating drive component for moving the U-shaped electric heating plate.

[0019] To achieve the above technical solution, the heating drive unit extends the U-shaped electric heating plate, which wraps around both sides of the hot melt adhesive tape and is then energized for heating. After heating is completed, the heating drive unit retracts the U-shaped electric heating plate. The extension and wrapping action of the U-shaped electric heating plate ensures that both sides of the hot melt adhesive tape are heated simultaneously, resulting in rapid heating and uniform melting. The timely retraction action after heating avoids interference with the subsequent pressing action of the first and second clamping components. The entire heating process is fast and does not occupy the pressing space, improving the welding cycle time and heating quality.

[0020] As a preferred embodiment of this application, the first clamping assembly includes a first base, a first support frame is provided on the first base, a first pressing cylinder is provided on the first support frame, a first pressing plate is provided on the telescopic rod of the first pressing cylinder, a first lower positioning groove is provided on the top surface of the first base along the conveying direction of the sealing strip, and a first upper positioning groove is provided on the first lower pressing plate to cooperate with the first lower positioning groove.

[0021] To achieve the above technical solution, after the sealing strip passes through the first lower positioning groove, the first pressing cylinder drives the first lower pressure plate to move downward, causing the first upper positioning groove to engage with the first lower positioning groove, thus pressing the sealing strip tightly within the groove. The downward pressing action of the pressing cylinder on the pressure plate confines the sealing strip within the contoured space formed by the upper and lower positioning grooves, ensuring clamping stability and preventing the sealing strip from being crushed. The bottom wall of the positioning groove is flush with the top surface of the support platform, ensuring that the sealing strip can pass smoothly without steps before clamping, avoiding obstruction during transport.

[0022] As a preferred embodiment of this application, the second clamping assembly includes a second base, a second support frame is provided on the second base, a second pressing cylinder is provided on the second support frame, a second pressing plate is provided on the telescopic rod of the second pressing cylinder, a second lower positioning groove is provided on the top surface of the second base along the conveying direction of the sealing strip, and a second upper positioning groove is provided on the second lower pressing plate to cooperate with the second lower positioning groove.

[0023] To achieve the above technical solution, the pressing and clamping action and the protruding embedding action are similar to those of the first clamping component, which ensures that the second clamping component can also stably fix the other end of the sealing strip. Moreover, the clamping actions on both sides are independently controlled, which can adapt to the clamping requirements of sealing strips of different lengths and avoid the sealing strip shifting when pressed due to insufficient clamping force on one side.

[0024] As a preferred embodiment of this application, the first clamping assembly is provided with a first cutting blade at its top, and the second clamping assembly is provided with a second cutting blade corresponding to the first cutting blade.

[0025] The above technical solution enables the hot melt adhesive tape above the sealing strip to be cut when the second clamping component presses against the first clamping component, and the first cutting blade presses against the second cutting blade, so that the hot melt adhesive tape can be released later. At the same time, it is convenient to remove the bonded sealing ring without affecting the release of the hot melt adhesive tape later.

[0026] As a preferred embodiment of this application, the sealing strip cutting mechanism includes a cutting frame, a cutting cylinder is provided on the cutting frame, and a cutting blade is provided on the telescopic rod of the cutting cylinder.

[0027] To achieve the above technical solution, the telescopic rod of the cutting cylinder extends, driving the cutting blade downward to cut the sealing strip placed on the support platform. The cylinder-driven cutting blade's rapid downward cutting action enables online fixed-length cutting of the sealing strip during the conveying process. The cutting action is automatically connected with the preceding and following processes (unwinding and conveying), eliminating the need for manual cutting and ensuring that each section of the sealing strip is of consistent length and has a clean cut, providing a dimensional basis for precise subsequent end-to-end joining.

[0028] As a preferred embodiment of this application, the cutting blade is V-shaped.

[0029] To achieve the above technical solution, the cutting blade is V-shaped, cutting the sealing strip into segments with one side longer than the other in the width direction. The V-shaped cutting action ensures that the inner and outer rings of the sealing strip perfectly match after being folded into a circle at both ends, reducing the inner ring bulges or wrinkles caused by the mutual compression of internal materials when the two ends are straight and joined together. At the same time, the sharp corner waste generated by the V-shaped cut is more likely to fall off the support platform during the subsequent pushing of the sealing strip, eliminating the need for manual cleaning and facilitating continuous automated production.

[0030] In summary, this application includes at least one of the following beneficial technical effects: 1. The sealing strip unwinding mechanism automatically releases the sealing strip, the sealing strip cutting mechanism cuts it, the first clamping component and the second clamping component clamp the two ends of the cut sealing strip respectively, the hot melt adhesive tape supply component supplies hot melt adhesive tape between the two ends, the hot melt adhesive tape heating component heats the tape to melt it, and the pressure driving component drives the first clamping component and the second clamping component to rotate and press, so that the two ends are bonded by the hot melt adhesive tape; through the continuous automated actions of unwinding, cutting, clamping, adhesive supply, heating and pressing, no manual intervention is required for cutting, positioning, applying adhesive and pressing the sealing strip, which fundamentally solves the problems of low efficiency, inaccurate positioning and uneven adhesion of manual operation, realizes automatic butt welding of the two ends of the sealing strip, and steadily improves production efficiency and product qualification rate. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0033] Figure 2 This is a side view of an embodiment of this application.

[0034] Figure 3 This is a schematic diagram of the welding mechanism in an embodiment of this application.

[0035] Figure 4 This is a schematic diagram of the structure of the first clamping component in the embodiments of this application.

[0036] Figure 5 This is a schematic diagram of the structure of the second clamping component in the embodiments of this application.

[0037] Figure 6 This is a schematic diagram of the operation of the pressure driving component in the embodiments of this application.

[0038] Figure 7 This is a top view of the pressing station of the first clamping component and the second clamping component in the embodiments of this application.

[0039] Reference numerals: 1. Frame; 2. Sealing strip unwinding mechanism; 21. Unwinding roller; 23. Support platform; 24. Engaging drive roller; 3. Sealing strip cutting mechanism; 31. Cutting frame; 32. Cutting cylinder; 33. Cutting blade; 4. Welding mechanism; 41. First clamping assembly; 411. First base; 412. First support frame; 413. First pressing cylinder; 414. First pressing plate; 415. First lower positioning groove; 416. First upper positioning groove; 417. First protrusion; 42. Second clamping assembly; 421. Second base; 422. Second support frame; 423. Second pressing cylinder; 424. Second lower pressing plate; 425. Second lower positioning groove; 426. Second upper positioning groove; 427. Second protrusion; 43. Pressing drive assembly; 431. Rotation drive component; 431 1. Mounting bracket; 4312. Main shaft; 4313. Swing arm; 4314. Driven shaft; 4315. Mounting platform; 43171. Secondary shaft; 43172. Secondary gear; 43173. Main gear; 43174. Drive gear; 43175. Driven gear; 43176. Gear belt; 432. Pressing drive component; 4321. Pressing mounting bracket; 4322. Slide rail; 4323. Pressing table; 4324. Pressing cylinder; 4325. Conveyor belt; 44. Hot melt adhesive tape supply assembly; 441. Unwinding frame; 442. Hot melt adhesive tape unwinding roller; 443. Traction roller; 444. Transition roller; 45. Hot melt adhesive tape heating assembly; 451. U-shaped electric heating plate; 452. Heating drive component; 46. First cutter; 47. Second cutter; 100. Sealing strip. Detailed Implementation

[0040] The following is in conjunction with the appendix Figures 1 to 7 This application will be described in further detail.

[0041] This application discloses an automatic welding device for washing machine sealing strips. (Refer to...) Figure 1 An automatic welding device for washing machine sealing strips includes a sealing strip unwinding mechanism 2, a sealing strip cutting mechanism 3, and a welding mechanism 4 for pressing and welding the two ends of the cut sealing strip, arranged sequentially along the sealing strip conveying direction. A frame 1 is also included for mounting the sealing strip unwinding mechanism 2 and the sealing strip cutting mechanism 3.

[0042] The sealing strip unwinding mechanism 2 includes a sealing strip unwinding roller 21 mounted on the frame 1 and an unwinding drive (not shown in the figure) for driving the sealing strip unwinding roller 21 to rotate. The unwinding drive is configured as a servo motor driving the sealing strip unwinding roller 21 to rotate at a controllable speed via a gear set, thereby achieving controllable unwinding of the sealing strip. To further ensure the length of the sealing strip being fed, a support platform 23 is provided on the support platform 23. The support platform 23 is equipped with a pair of meshing drive rollers 24 and a feeding drive (not shown in the figure) for driving the meshing drive rollers 24 to mesh and rotate. The feeding drive is configured as a servo motor driving the meshing drive rollers 24 to mesh and rotate via a gear set, thereby causing the sealing strip to adhere to the support platform 23 and be conveyed forward, with a controllable conveying length. At the same time, to ensure that the relatively "flexible" sealing strip is conveyed forward normally without jamming, the support platform 23 is equipped with several conveying rollers (not shown in the figure) evenly spaced along the conveying direction. The top surface of the conveying rollers protrudes 1-5 mm from the support platform 23 to ensure a rolling conveying effect while preventing excessive protrusion that could cause jamming.

[0043] The sealing strip cutting mechanism 3 includes a cutting frame 31, which is mounted on the frame 1. A cutting cylinder 32 is mounted on the cutting frame 31 and is positioned vertically downwards. A cutting blade 33 is mounted on the telescopic rod of the cutting cylinder 32. The cutting cylinder 32 drives the cutting blade 33 downwards, thereby cutting the sealing strip placed on the support platform 23. To reduce the risk of misalignment between the inner and outer rings after the sealing strip is joined, the cutting blade 33 is V-shaped. This results in the sealing strip being cut with one side longer than the other, allowing for subsequent folding and bonding. Furthermore, the waste material from the cutting process can be pushed off the support platform 23 by subsequent sealing strips.

[0044] The welding mechanism 4 includes a first clamping component 41 and a second clamping component 42 that respectively clamp the two ends of the sealing strip; a pressure driving component 43 for driving the first clamping component 41 and the second clamping component 42 to rotate and press against each other; a hot melt adhesive tape supply component 44 for supplying hot melt adhesive tape between the first clamping component 41 and the second clamping component 42; and a hot melt adhesive tape heating component 45 for heating the hot melt adhesive tape.

[0045] The first clamping assembly 41 includes a first base 411, a first support frame 412 mounted on the first base 411, a first pressing cylinder 413 mounted on the first support frame 412, a first pressing plate 414 mounted on the telescopic rod of the first pressing cylinder 413, and a first lower positioning groove 415 extending through the sealing strip conveying direction on the top surface of the first base 411. The bottom wall of the first lower positioning groove 415 is flush with the top surface of the support platform 23, allowing the sealing strip to pass through the first lower positioning groove 415 and continue to be conveyed forward. The first lower pressing plate 414 is provided with a first upper positioning groove 416 that cooperates with the first lower positioning groove 415. That is, the first pressing cylinder 413 drives the first lower pressing plate 414 to press down, thereby pressing the sealing strip tightly in the first lower positioning groove 415 and the first upper positioning groove 416. This achieves the effect of clamping one end of the sealing strip. To ensure the sealing strip can smoothly pass through the first lower positioning groove 415 and enter the second clamping assembly 42, the width of the first lower positioning groove 415 is slightly larger than the width of the sealing strip, and the side walls at both ends of the first positioning groove 415 are provided with arc-shaped chamfers to reduce the occurrence of jamming. Meanwhile, to ensure the sealing strip is not loosened, several first protrusions 417 are provided on the upper top wall of the first upper positioning groove 416, so that the first protrusions 417 press firmly against the sealing strip. Because the sealing strip itself has a certain degree of flexibility, the first protrusions 417 can embed into the sealing strip, thus ensuring that the sealing strip will not retract during subsequent pressure application, thereby ensuring the subsequent pressure application effect.

[0046] The second clamping assembly 42 includes a second base 421, a second support frame 422 mounted on the second base 421, a second pressing cylinder 423 mounted on the second support frame 422, a second pressing plate 424 mounted on the telescopic rod of the second pressing cylinder 423, and a second lower positioning groove 425 extending along the conveying direction of the sealing strip on the top surface of the second base 421. The bottom wall of the second lower positioning groove 425 is flush with the top surface of the support platform 23, allowing the sealing strip to pass through the second lower positioning groove 425 and continue to be conveyed forward. The second lower pressing plate 424 has a second upper positioning groove 426 that cooperates with the second lower positioning groove 425. That is, the second pressing cylinder 423 drives the second lower pressing plate 424 to press down, thereby pressing the sealing strip tightly in the second lower positioning groove 425 and the second upper positioning groove 426. This achieves the effect of clamping one end of the sealing strip. To ensure the sealing strip can smoothly pass through the second lower positioning groove 425 and enter the second clamping assembly 42, the width of the second lower positioning groove 425 is slightly larger than the width of the sealing strip, and the side walls at both ends of the second positioning groove 425 can be provided with arc-shaped chamfers to reduce the occurrence of jamming. Meanwhile, to ensure the sealing strip is not loosened, several second protrusions 427 are provided on the upper top wall of the second upper positioning groove 426, so that the second protrusions 427 press firmly against the sealing strip. Because the sealing strip itself has a certain degree of flexibility, the second protrusions 427 can be embedded within the sealing strip, thus ensuring that the sealing strip will not retract during subsequent pressure application, thereby guaranteeing the subsequent pressure application effect.

[0047] Meanwhile, in order to ensure that both ends of the cut sealing strip can accurately enter the first clamping assembly 41 and the second clamping assembly 42, a detection device such as a laser detector can be installed on both the first clamping assembly 41 and the second clamping assembly 42 to detect whether the sealing strip is in place.

[0048] The pressure drive assembly 43 includes a rotary drive 431 for driving the first clamping assembly 41 to revolve and rotate, and a clamping drive 432 for driving the second clamping assembly 42 to translate. The rotary drive component 431 includes a mounting bracket 4311, on which a main shaft 4312 is rotatably mounted. A swing arm 4313 is fixed on the main shaft 4312. A driven shaft 4314 is rotatably mounted on the swing arm 4313. A mounting platform 4315 is mounted on the driven shaft 4314. A first clamping assembly 41 is mounted on the mounting platform 4315. A drive motor that drives the main shaft 4312 to rotate is mounted on the mounting bracket 4311. The drive motor can indirectly drive the main shaft 4312 to rotate through a direct drive or a gearbox or other transmission components, thereby driving the swing arm 4313 and the first clamping assembly 41 on the swing arm 4313 to rotate around the main shaft 4312. This allows the drive motor to start and drive the first clamping assembly 41 to clamp the tail end of the sealing strip and rotate around the drive shaft until it is opposite to the side of the hot melt adhesive tape heating assembly 45. At this time, the end of the sealing strip held by the first clamping component 41 still faces outward, that is, it faces the same direction as the end of the sealing strip held by the second clamping component 42. In order to make the end of the sealing strip of the first clamping component 41 and the end of the sealing strip on the second clamping component 42 face each other, a secondary rotating shaft 43171 is rotatably provided on the swing arm 4313, a secondary gear 43172 is fixedly provided on the secondary rotating shaft 43171, and a main gear 43173 is sleeved on the main rotating shaft 4312. The secondary gear 43172 meshes with the main gear 43173. The main gear 43173 is fixedly provided relative to the mounting bracket 4311 through a connecting rod, etc., that is, the main rotating shaft 4312 will not drive the main gear 43173 to rotate when it rotates. A drive gear 43174 is provided on the secondary shaft 43171, and a driven gear 43175 is provided on the secondary shaft 4314. A gear belt 43176 for mutual transmission is provided between the drive gear 43174 and the driven gear 43175. When the drive motor drives the main rotating shaft 4312 to rotate, the swing arm 4313 rotates along with the main rotating shaft 4312. The secondary rotating shaft 43171 on the swing arm 4313 rotates around the main rotating shaft 4312, while the main gear 43173 on the main rotating shaft 4312 remains stationary. This causes the driven gear 43175 to mesh with the main gear 43173 as it rotates around the main gear 43173. This drives the driven gear 43175 to rotate, which in turn drives the secondary rotating shaft 43171 to rotate. The rotation of the secondary rotating shaft 43171 drives the drive gear 43174 on the secondary rotating shaft 43171 to rotate. The rotation of the drive gear 43174 drives the driven gear 43175 to rotate through the gear belt 43176. This drives the driven shaft 4314 to rotate around its own axis, which in turn drives the mounting platform 4315 and the first clamping assembly 41 on the mounting platform 4315 to rotate. That is, the first clamping assembly 41 rotates while rotating around the main rotating shaft 4312. By setting the transmission ratio between each gear, the first clamping component 41 can revolve around the main shaft 4312 and rotate to the side of the second clamping component 42. At the same time, the first clamping component 41 rotates 180° so that the end of the sealing strip clamped by the first clamping component 41 is opposite to the second clamping component 42.

[0049] The clamping drive component 432 includes a clamping mounting bracket 4321, a slide rail 4322 on the clamping mounting bracket 4321, a clamping platform 4323 on the slide rail 4322, a second clamping assembly 42 on the clamping platform 4323, and a clamping cylinder 4324 on the clamping mounting bracket 4321 that drives the clamping platform 4323 to move along the slide rail 4322. When the first clamping assembly moves to the side of the second clamping assembly, the clamping cylinder 4324 drives the clamping platform 4323 and the second clamping assembly 42 on the clamping platform 4323 to move laterally and press against the first clamping assembly 41. This causes the end of the sealing strip held by the second clamping assembly 42 to press against the end of the sealing strip held by the first clamping assembly 41, thus achieving the connection of the two ends of the sealing strip.

[0050] Meanwhile, in order to ensure that the sealing strip can pass smoothly through the first clamping assembly 41 and enter the second clamping assembly 42, the clamping mounting frame 4321 is provided with a conveyor belt 4325 arranged along the conveying direction of the sealing strip and a conveyor motor (not shown in the figure) that drives the conveyor belt 4325 to rotate. The top surface of the conveyor belt 4325 is flush with or 1-5mm higher than the bottom surface of the second lower positioning groove 425, so that the conveyor belt 4325 can drag the sealing strip forward to ensure that the end of the sealing strip can enter the second clamping assembly 42.

[0051] The hot melt adhesive tape supply assembly 44 includes an unwinding frame 441 disposed on the side of the second clamping assembly 42 away from the sealing strip cutting mechanism 3. The unwinding frame 441 is fixed on the clamping mounting frame 4321. The unwinding frame 441 is provided with a hot melt adhesive tape unwinding roller 442, a traction roller 443, and a transition roller 444 disposed between the hot melt adhesive tape unwinding roller 442 and the traction roller 443, as well as an unwinding drive motor (not shown) for driving the traction roller 443 to rotate. That is, after the hot melt adhesive tape roll is placed on the hot melt adhesive tape unwinding roller 442, the hot melt adhesive tape passes through the transition roller 444 and the traction roller 443. After the traction roller 443 rotates, it pulls the hot melt adhesive tape roll to rotate and unwind, so that the hot melt adhesive tape falls vertically from the traction roller 443 to the side of the second clamping assembly 42 for subsequent heating.

[0052] The hot melt adhesive tape heating assembly 45 includes a U-shaped electric heating plate 451 disposed on the side of the second clamping assembly 42 and a heating drive 452 for moving the U-shaped electric heating plate 451. Specifically, when the hot melt adhesive tape is unwound to the side of the second clamping assembly 42, the heating drive 452 causes the U-shaped electric heating plate 451 to extend. Because of its U-shape, the U-shaped electric heating plate can wrap around both sides of the hot melt adhesive tape, and then electricity is applied to heat the hot melt adhesive tape. After heating is complete, the heating drive 452 causes the U-shaped electric heating plate 451 to retract, without affecting the subsequent pressing of the first clamping assembly 41 and the second clamping assembly 42.

[0053] The overall processing procedure is as follows: First, the sealing strip is unwound by the sealing strip unwinding mechanism 2, allowing the ends of the sealing strip to pass sequentially through the first clamping assembly 41 and then be pulled into the second clamping assembly 42 by the conveyor belt 4325. Then, the sealing strip is cut by the sealing strip cutting mechanism 3. Afterwards, the first clamping assembly 41 and the second clamping assembly 42 are activated to clamp and fix the cut ends of the sealing strip (or the strip can be cut first and then clamped). Next, the rotation drive 431 drives the first clamping assembly 41 to rotate to the side of the second clamping assembly 42, aligning the two ends of the sealing strip. At this time, the hot melt adhesive tape supply assembly 44 unwinds the hot melt adhesive tape, allowing it to enter between the first clamping assembly 41 and the second clamping assembly 42, i.e., between the two ends of the sealing strip. Then, the hot melt adhesive tape heating assembly 45 heats the hot melt adhesive tape to make it adhesive. After heating is complete, the heating drive 452 drives the U-shaped electric heating plate 451 to retract. After the U-shaped electric heating plate 451 retracts, the pressing drive 432 drives the second clamping assembly 42 to press against the first clamping assembly 41. This causes the end of the sealing strip on the second clamping assembly 42 to press against the end of the sealing strip on the first clamping assembly 41. Because there is heated hot melt adhesive tape between them, the two ends of the sealing strip are bonded and fixed together under pressure and the action of the hot melt adhesive tape to form a sealing ring. This achieves the effect of automatic cutting and pressing bonding of the sealing ring.

[0054] The first clamping component 41 is provided with a first cutting blade 46 at its top, and the second clamping component 42 is provided with a second cutting blade 47 corresponding to the first cutting blade 46. This allows the first cutting blade 46 to press against the second cutting blade 47 when the second clamping component 42 presses against the first clamping component 41, thus cutting the hot melt adhesive tape above the sealing strip, so that the hot melt adhesive tape can be fed later. At the same time, it is convenient to remove the bonded sealing ring without affecting the feeding of the hot melt adhesive tape later.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic welding device for a washing machine sealing strip, characterized in that: It includes a sealing strip unwinding mechanism (2), a sealing strip cutting mechanism (3), and a welding mechanism (4) for pressing and welding the two ends of the cut sealing strip, arranged sequentially along the sealing strip conveying direction; The welding mechanism (4) includes a first clamping assembly (41) and a second clamping assembly (42) that respectively clamp both ends of the sealing strip; A pressure drive assembly (43) is used to drive the first clamping assembly (41) and the second clamping assembly (42) to rotate and press against each other; A hot melt adhesive tape supply assembly (44) is used to supply hot melt adhesive tape between a first clamping assembly (41) and a second clamping assembly (42); And a hot melt adhesive tape heating assembly (45) for heating the hot melt adhesive tape; The pressure drive assembly (43) includes a rotary drive (431) for driving the first clamping assembly (41) to revolve and rotate, and a pressing drive (432) for driving the second clamping assembly (42) to translate.

2. The automatic welding device for a washing machine sealing strip according to claim 1, characterized in that: The rotary drive component (431) includes a mounting bracket (4311), a main rotating shaft (4312) rotatably mounted on the mounting bracket (4311), a swing arm (4313) fixed on the main rotating shaft (4312), a secondary rotating shaft (4314) rotatably mounted on the swing arm (4313), a mounting platform (4315) mounted on the secondary rotating shaft (4314), a first clamping assembly (41) mounted on the mounting platform (4315), and a drive motor for driving the main rotating shaft (4312) to rotate on the mounting bracket (4311). A secondary shaft (43171) is rotatably mounted on the swing arm (4313). A secondary gear (43172) is fixedly mounted on the secondary shaft (43171). A main gear (43173) is sleeved on the main shaft (4312). The secondary gear (43172) meshes with the main gear (43173). The main gear (43173) is fixedly mounted relative to the mounting bracket (4311). A drive gear (43174) is mounted on the secondary shaft (43171). A driven gear (43175) is mounted on the driven shaft (4314). A gear belt (43176) for mutual transmission is provided between the drive gear (43174) and the driven gear (43175).

3. The automatic welding device for a washing machine sealing strip according to claim 1, characterized in that: The clamping drive component (432) includes a clamping mounting bracket (4321), a slide rail (4322) is provided on the clamping mounting bracket (4321), a clamping table (4323) is provided on the slide rail (4322), a second clamping assembly (42) is provided on the clamping table (4323), and a clamping cylinder (4324) is provided on the clamping mounting bracket (4321) to drive the clamping table (4323) to move along the slide rail (4322).

4. The automatic welding device for a washing machine sealing strip according to claim 3, characterized in that: The clamping mounting bracket (4321) is provided with a conveyor belt (4325) arranged along the conveying direction of the sealing strip and a conveying motor that drives the conveyor belt (4325) to rotate. The conveyor belt (4325) drags the sealing strip forward into the second clamping assembly (42).

5. The automatic welding device for a washing machine sealing strip according to claim 1, characterized in that: The hot melt adhesive tape supply assembly (44) includes an unwinding frame (441), on which a hot melt adhesive tape unwinding roller (442), a traction roller (443), and a transition roller (444) disposed between the hot melt adhesive tape unwinding roller (442) and the traction roller (443) are provided, as well as an unwinding drive motor for driving the traction roller (443) to rotate; the traction roller (443) is disposed on the side of the second clamping assembly (42) away from the sealing strip cutting mechanism (3).

6. The automatic welding device for a washing machine sealing strip according to claim 1, characterized in that: The hot melt adhesive tape heating assembly (45) includes a U-shaped electric heating plate (451) disposed on the side of the second clamping assembly (42) and a heating drive (452) for moving the U-shaped electric heating plate (451).

7. The automatic welding device for a washing machine sealing strip according to claim 1, characterized in that: The first clamping assembly (41) includes a first base (411), a first support frame (412) is provided on the first base (411), a first pressing cylinder (413) is provided on the first support frame (412), a first pressing plate (414) is provided on the telescopic rod of the first pressing cylinder (413), a first lower positioning groove (415) is provided on the top surface of the first base (411) and extends through the sealing strip conveying direction, and a first upper positioning groove (416) is provided on the first lower positioning groove (415) and cooperates with the first lower positioning groove (415).

8. The automatic welding device for a washing machine sealing strip according to claim 1, characterized in that: The second clamping assembly (42) includes a second base (421), a second support frame (422) is provided on the second base (421), a second pressing cylinder (423) is provided on the second support frame (422), a second pressing plate (424) is provided on the telescopic rod of the second pressing cylinder (423), a second lower positioning groove (425) is provided on the top surface of the second base (421) and extends through the sealing strip conveying direction, and a second upper positioning groove (426) is provided on the second lower pressing plate (424) and cooperates with the second lower positioning groove (425).

9. The automatic welding device for a washing machine sealing strip according to claim 1, characterized in that: The first clamping assembly (41) is provided with a first cutting blade (46) on its top, and the second clamping assembly (42) is provided with a second cutting blade (47) corresponding to the first cutting blade (46).

10. An automatic welding device for a washing machine sealing strip according to claim 1, characterized in that: The sealing strip cutting mechanism (3) includes a cutting frame (31), a cutting cylinder (32) is provided on the cutting frame (31), and a cutting blade (33) is provided on the telescopic rod of the cutting cylinder (32).

11. The automatic welding device for a washing machine sealing strip according to claim 10, characterized in that: The cutting blade (33) is V-shaped.

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