Refrigerator door seal multi-section welding production line and welding method

Abstract

The invention relates to the technical field of refrigerator door seal welding production lines, and discloses a refrigerator door seal multi-section welding production line and a welding method. The refrigerator door seal multi-section welding production line comprises a plurality of to-be-welded platforms and a welding system, wherein the to-be-welded platforms are annularly arranged, and each to-be-welded platform is provided with a plurality of layers of rubber sleeve positioning structures; the plurality of grabbing systems are respectively arranged above the plurality of to-be-welded platforms; the workpiece taking system is arranged above the welding system; according to the refrigerator door seal multi-section welding production line, welding of the multi-section door seal can be achieved, and the production efficiency of the door seal is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of refrigerator door seal welding production lines, and in particular to a refrigerator door seal multi-section welding production line and a welding method. Background Art

[0002] With the continuous innovation and diversification of modern refrigerator design, the shapes and styles of refrigerator doors are becoming more and more diverse, which directly leads to the different cross-sectional shapes of each side of the refrigerator door seal. When designing traditional fully automatic door seal production lines, they are often fed and welded based on standardized cross-sectional shapes, which cannot meet the diverse needs of modern refrigerator doors.

[0003] This is mainly because in the existing fully automatic door seal production line, the welding platform of the welding production line is an integral structure and can usually only be connected to a door seal rubber sleeve transportation line with one cross-section. This means that during the production process, materials can only be fed according to a predetermined order and cross-sectional shape. When it is necessary to produce door seals with different cross-sectional shapes, the existing production line often requires complex adjustments and modifications, which not only increases production costs, but also reduces production efficiency. Summary of the invention

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a refrigerator door seal multi-section welding production line and a welding method. The refrigerator door seal multi-section welding production line can not only realize the welding of multi-section door seals, but also greatly improve the production efficiency.

[0005] In order to achieve the above object, the first aspect of the present invention provides a refrigerator door seal multi-section welding production line, comprising:

[0006] A welding system, wherein the welding system comprises a plurality of welding modules, each of which comprises a plurality of multi-layer mold slots distributed up and down;

[0007] A plurality of platforms to be welded are arranged around the outside of the welding system, and each of the platforms to be welded is used to dock with rubber sleeve conveying lines of different cross-sections to receive the rubber sleeves conveyed by the rubber sleeve conveying lines and position the rubber sleeves in layers;

[0008] A plurality of grabbing systems are respectively arranged above the plurality of platforms to be welded, and the grabbing systems are used to grab the plurality of rubber sleeves distributed in multiple layers on the platforms to be welded, and move them to the corresponding multi-layer mold grooves for synchronous welding;

[0009] The picking system is arranged above the welding system and is used to transfer the welded multiple door seals from the welding area to the finished product area.

[0010] Optionally, the platform to be welded includes a frame platform and a supporting mechanism and a positioning mechanism arranged on the frame platform, and the supporting mechanism and the positioning mechanism are arranged in parallel and at intervals along the width direction of the frame platform.

[0011] Optionally, the supporting mechanism comprises:

[0012] A material supporting slide rail is arranged on the frame platform and extends along the length direction of the frame platform;

[0013] A material supporting slide, the material supporting slide is slidably connected to the material supporting slide rail;

[0014] A supporting cylinder is arranged on the top of the supporting slide, the output end of the supporting cylinder is connected to a supporting rod extending along the width direction of the frame platform, and a supporting plate is arranged at the front end of the supporting rod;

[0015] A photoelectric sensor is arranged at the front end of the material supporting slide and is used to monitor the rubber sleeve arrival signal.

[0016] Optionally, the positioning mechanism comprises a guide assembly and a positioning assembly whose sides can be fitted with each other, the guide assembly is arranged at one end of the frame platform, the positioning assembly is movably arranged on the side of the guide assembly, and the corresponding positions of the guide assembly and the positioning assembly are both provided with sleeve mold clamps;

[0017] Wherein, the positioning assembly includes a first positioning assembly and a second positioning assembly, the first positioning assembly is configured to clamp one end of the rubber sleeve and move toward the other end of the frame platform, and the second positioning assembly is used to position the other end of the rubber sleeve.

[0018] Optionally, the first positioning component includes:

[0019] A clamping assembly, which is closely attached to one side of the mold clamping jaw of the first positioning assembly, and the clamping assembly comprises an upper clamping arm and a clamping cylinder driving the upper clamping arm to clamp the rubber sleeve;

[0020] The top block assembly is arranged on the other side of the first positioning assembly sleeve mold clamping jaw, and the top block assembly includes a contoured top block facing the end surface of the rubber sleeve and a top block cylinder for driving the top block.

[0021] Optionally, a plurality of welding modules are provided, and the plurality of welding modules are distributed in an array and are all extended toward the center direction of the welding base;

[0022] The welding module group includes a stationary side template, a moving side template and a connecting rod mold clamping device. The connecting rod mold clamping device is arranged on the moving side template and is used to drive the moving side template to approach the stationary side template for mold clamping welding. After the moving side template and the stationary side template are clamped, a right-angled mold groove is formed.

[0023] Optionally, the welding base comprises:

[0024] A base, wherein a longitudinally extending first driving assembly is disposed on the base;

[0025] A first driving base plate is disposed transversely on the base;

[0026] A second driving base plate is disposed transversely on the base and is parallel to the first driving base plate;

[0027] Two first driving plates are symmetrically arranged on the first driving bottom plate, and are used to drive the movable side templates of two adjacent welding modules to move laterally;

[0028] Two second driving plates are symmetrically arranged on the second driving bottom plate, and are used to drive the static side templates of two adjacent welding modules to move laterally;

[0029] Wherein, the first driving assembly is used to drive the first driving base plate and the second driving base plate to move longitudinally.

[0030] Optionally, the gripping system comprises:

[0031] A grabbing frame is arranged above the platform to be welded, and one end of the grabbing frame extends above the welding position;

[0032] A y-axis grabbing and adjusting mechanism is arranged on the grabbing frame, and the y-axis grabbing and adjusting mechanism comprises a y-axis guide rail, a y-axis driving assembly slidably connected to the y-axis guide rail, and a y-axis driving mechanism driving the y-axis driving assembly to reciprocate linearly on the y-axis guide rail;

[0033] An x-axis grabbing and adjusting mechanism, comprising an x-axis driving module extending along the length direction of the platform to be welded, wherein the x-axis driving module is connected to the bottom end of the y-axis driving assembly;

[0034] The z-axis grabbing and adjusting mechanism comprises a z-axis driving module connected to the x-axis driving module and arranged vertically, and a material picking assembly is arranged at the lower end of the z-axis driving module.

[0035] Optionally, the pickup system includes:

[0036] A pickup rack is arranged above the welding system, with one end extending to the finished product area;

[0037] A dual-cylinder drive assembly, comprising a mobile frame, the mobile frame is slidably connected to the pickup frame, the dual-cylinder drive assembly comprises a first lifting cylinder assembly and a second lifting cylinder assembly, the first lifting cylinder assembly and the second lifting cylinder assembly are transmission-connected together, the first lifting cylinder assembly is used to perform a first-stage lifting, and the second lifting cylinder assembly performs a second-stage lifting based on the first-stage lifting;

[0038] The picking adjustment mechanism is arranged at the output end of the dual-cylinder drive assembly. The picking adjustment mechanism is provided with at least eight position-adjustable picking claws, and at least two picking claws are correspondingly arranged on each side of the finished refrigerator door seal.

[0039] A second aspect of the present invention provides a method for welding a refrigerator door seal using the above-mentioned refrigerator door seal multi-section welding production line, comprising:

[0040] A plurality of platforms to be welded respectively obtain a plurality of rubber sleeves, and position the plurality of rubber sleeves in layers;

[0041] Start the grabbing system to grab the multiple layers of rubber sleeves between two adjacent welding modules;

[0042] Start the two adjacent welding modules, and cooperate with the grabbing system to pass the two ends of the multi-layer rubber sleeve through the multi-layer mold grooves on the two adjacent welding modules respectively;

[0043] Driving the plurality of welding modules to synchronously weld the ends of two adjacent rubber sleeves of the multilayer;

[0044] Start the retrieval system, take out the welded multi-layer door sealing frame from the welding system, and transfer it to the finished product area.

[0045] Through the above technical scheme, the refrigerator door seal multi-section welding production line provided by the present invention can respectively connect to the rubber sleeve conveying lines of different sections by setting up multiple welding platforms arranged in a ring, thereby realizing the simultaneous reception and positioning of rubber sleeves of different sections, and then transporting the rubber sleeves of different sections located on different welding platforms to the welding system for synchronous welding through multiple grabbing systems. After welding is completed, the retrieval system can move the finished door seal to the finished product area in time; the welding system is set at the center of the ring area surrounded by multiple welding platforms, shortening the process time of the rubber sleeve from positioning to mold welding, and improving production efficiency. In addition, for the multi-layer rubber sleeve positioning structure set on the welding platform, the welding system, the grabbing system and the retrieval system are all set with matching structures so that the welding operations of multiple door seals can be carried out simultaneously, further improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1It is a schematic diagram of the overall structure of a refrigerator door seal multi-section welding production line provided by the present invention;

[0047] Figure 2 It is a schematic diagram of the overall structure of a platform to be welded according to one embodiment of the present invention;

[0048] Figure 3 yes Figure 2 The enlarged view of point A in the middle;

[0049] Figure 4 is a schematic diagram of the overall structure of a welding system according to an embodiment of the present invention;

[0050] Figure 5 is a schematic structural diagram of a connecting rod mold clamping device in a first state according to an embodiment of the present invention;

[0051] Figure 6 is a schematic structural diagram of a connecting rod mold clamping device in a second state according to an embodiment of the present invention;

[0052] Figure 7 is a structural schematic diagram of a welding base from a first perspective according to an embodiment of the present invention;

[0053] Figure 8 is a structural schematic diagram of a welding base according to an embodiment of the present invention from a second viewing angle;

[0054] Fig. 9 is a schematic diagram of the overall structure of a gripping system according to an embodiment of the present invention;

[0055] Fig.10 yes Fig. 9 The enlarged view of point B in the middle;

[0056] Fig.11 is a schematic diagram of the overall structure of a pickup system according to an embodiment of the present invention;

[0057] Fig.12 It is a schematic diagram of a partial structure inside a dual-cylinder drive assembly according to an embodiment of the present invention;

[0058] Fig.13 yes Fig.11 Enlarged view of point C in the middle.

[0059] Description of Reference Numerals

[0060] 1. Platform to be welded; 11. Rack platform; 12. Support rail; 13. Support slide; 14. Support cylinder; 141. Support rod; 142. Support plate; 15. Photoelectric sensor; 16. Guide assembly; 161. First mounting seat; 162. First clamping jaw cylinder; 17. First positioning assembly; 171. First drive module; 172. Second mounting seat; 173. Second clamping jaw cylinder; 174. Upper clamping arm; 175. Clamping cylinder; 176. Profiled top block; 177. Top block cylinder; 18. Second positioning assembly; 181. Second drive module; 182. Third mounting seat; 183. Third clamping jaw cylinder; 19. Sleeve mold clamping jaw; 2. Grabbing system; 21. Grabbing rack; 22. Y-axis guide rail; 23. Y-axis drive assembly; 231. Y-axis drive plate; 232. Hanging plate; 233. Y-axis slider base; 24. Y-axis drive mechanism; 241. Y-axis drive motor; 242. Y-axis drive screw; 251. First X-axis drive module; 252. Second X-axis drive module; 26. Back plate; 271. First Z-axis drive module; 272. Second Z-axis drive module; 273. Third Z-axis drive module; 28. Picking assembly; 281. Translation cylinder assembly; 282. Gripper mounting plate; 283. Gripper drive cylinder; 284. Contour gripper; 3. Welding system; 31. Welding base; 311, base; 3111, base rail; 3112, base rack; 3113, base motor; 3114, base gear; 312, first drive base plate; 3121, first drive base plate rail; 3122, first drive base plate rack; 3123, first drive base plate motor; 3124, first drive base plate gear; 313, second drive base plate; 3131, second drive base plate rail; 3132, second drive base plate rack; 3133, second drive base plate motor; 3134, second drive base plate gear; 314, first drive plate; 315, second drive plate; 32, welding module; 321, static edge mold Plate; 322, moving edge template; 323, connecting rod mold clamping device; 3231, first bottom plate; 3232, first fixed component; 3233, second fixed component; 3234, first connecting rod; 3235, second connecting rod; 3236, mold clamping drive component; 4, pick-up system; 41, pick-up rack; 42, moving rack; 43, first cylinder; 431, first connecting sleeve; 44, second cylinder; 441, second connecting sleeve; 45, connecting rod; 451, connecting plate; 46, y-axis adjustment beam; 461, beam connecting guide rail; 462, beam connecting slider; 463, beam connecting block; 47, x-axis adjustment beam; 48, material picking clamp. DETAILED DESCRIPTION

[0061] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0062] It should be noted that, in the description of the present invention, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", etc., indicating the orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0063] In addition, the words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0064] It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meaning of the above terms in the present invention can be understood according to the specific circumstances.

[0065] Figure 1 The overall structure diagram of a refrigerator door seal multi-section welding production line provided by the present invention is shown. Figure 1 As shown, the refrigerator door seal multi-section welding production line mainly includes a welding platform 1, a gripping system 2, a welding system 3 and a picking system 4.

[0066] In the production process of refrigerator door seals, the injection-molded material needs to be cut into multiple rubber sleeves, and then the adjacent ends of the multiple rubber sleeves are welded according to the shape of the door seal to form a finished door seal.

[0067] The present invention provides multiple welding platforms 1 for positioning the door seal rubber sleeves that have been cut and are about to be welded together. The independently arranged welding platforms 1 can be connected to the rubber sleeve conveying lines of different cross-sections respectively to ensure that the rubber sleeves of various cross-sections can be accurately conveyed to the designated positions.

[0068] Furthermore, each platform 1 to be welded is equipped with a multi-layer rubber sleeve positioning structure, which can simultaneously position multiple rubber sleeves arranged in parallel up and down.

[0069] The present invention surrounds a plurality of platforms 1 to be welded into an annular area, and a gripping system 2 is arranged above each platform 1 to be welded. It can be understood that the gripping system 2 can be equipped with corresponding sensors and visual recognition systems, which can accurately identify and grip the layered rubber sleeves, and can quickly and stably transfer the rubber sleeves from the platform 1 to be welded to the specified position in the welding system 3.

[0070] The welding system 3 of the present invention is arranged in an annular area surrounded by a plurality of platforms 1 to be welded. Specifically, the welding system 3 comprises a welding base 31 and a plurality of welding modules 32 arranged on the welding base 31. The welding modules 32 are provided with multi-layer mold grooves arranged up and down for simultaneously welding a plurality of rubber sleeves arranged in layers.

[0071] The retrieval system 4 of the present invention is arranged above the welding system 3 and is used to transfer the welded door seals from the welding area to the finished product area.

[0072] In a traditional refrigerator door seal welding production line, the platform to be welded 1 is an integral structure, and the entrance of the platform to be welded 1 can usually only be connected to a rubber sleeve conveyor line of the same cross-section. When door seals of various cross-sections need to be produced, the traditional integral structure of the platform to be welded 1 needs to be frequently replaced or adjusted, which will lead to production interruptions and low efficiency, and the original welding system 3 can only weld one door seal at a time, further reducing production efficiency. In an embodiment of the present invention, by setting a plurality of independent platforms to be welded 1 that can be connected to rubber sleeve conveyor lines of different cross-sections, rubber sleeves of various cross-sections can be accurately conveyed to designated positions, and the multi-layer rubber sleeve positioning structure arranged on each platform to be welded 1 cooperates with the multi-layer mold groove arranged in the welding system 3, so that the welding operations of multiple door seals can be carried out simultaneously, thereby greatly improving the welding efficiency and achieving a substantial increase in production efficiency.

[0073] In this embodiment of the invention, Figure 2 As shown, the platform 1 to be welded includes a frame platform 11 and a supporting mechanism and a positioning mechanism arranged on the frame platform 11 . The supporting mechanism and the positioning mechanism are arranged in parallel and at intervals along the width direction of the frame platform 11 .

[0074] The frame platform 11 is the basic structure of the entire welding platform 1, which is used to support the supporting mechanism and the positioning mechanism. The supporting mechanism is arranged on the frame platform 11 to support the rubber sleeve. The positioning mechanism is also arranged on the frame platform 11, parallel to the supporting mechanism and separated by a certain distance. Its main function is to accurately fix the position of the rubber sleeve to ensure the alignment accuracy and consistency during the welding process.

[0075] In some embodiments, the supporting mechanism may be provided in plurality, and the plurality of supporting mechanisms are arranged at intervals along the length direction of the frame platform 11 to facilitate supporting rubber sleeves of different lengths.

[0076] Specifically, the material supporting mechanism includes a material supporting slide rail 12 , a material supporting slide seat 13 , a material supporting cylinder 14 and a photoelectric sensor 15 .

[0077] The material supporting slide rail 12 is arranged on the frame platform 11 and extends along the length direction of the frame platform 11, providing a clear sliding path for the material supporting mechanism. The material supporting slide seat 13 is slidably connected to the material supporting slide rail 12. The top of the material supporting slide seat 13 is connected to the material supporting cylinder 14. The output end of the material supporting cylinder 14 is connected to a supporting rod 141. A supporting plate 142 is arranged at the front end of the supporting rod 141. Under the action of the material supporting cylinder 14, the supporting rod 141 drives the supporting plate 142 to extend or retract toward the direction of the rubber sleeve.

[0078] In some embodiments, a plurality of material supporting slides 13 may be provided, and the plurality of material supporting slides 13 may slide on the material supporting rail 12 along a preset sliding path.

[0079] In some embodiments, the support plate 142 can be configured to have multiple layers, and can be used to support multiple layers of rubber sleeves at the same time.

[0080] The photoelectric sensor 15 is configured to monitor the in-place signal of the rubber sleeve, and the supporting cylinder 14 drives the supporting rod 141 connected to the supporting plate 142 to extend forward to support the rubber sleeve according to the in-place signal. Specifically, the photoelectric sensor 15 is installed at the front end of the supporting slide 13, facing the positioning direction of the rubber sleeve. When the positioning mechanism positions the rubber sleeve, the photoelectric sensor 15 detects the in-place signal of the rubber sleeve, and the supporting cylinder 14 receives the signal from the photoelectric sensor 15 and starts to work.

[0081] The positioning mechanism includes a guide component 16 and a positioning component whose sides can be fitted with each other. The guide component 16 is arranged at one end of the frame platform 11 and is used to introduce the rubber sleeve. The positioning component is movably arranged on the side of the guide component 16. Through the mutual cooperation between the guide component 16 and the positioning component, high-precision positioning of the rubber sleeve can be achieved. The corresponding positions of the guide component 16 and the positioning component are provided with a sleeve mold clamp 19, and the sleeve mold clamp 19 is provided with a plurality of upper and lower rubber sleeve profiling openings for carrying the rubber sleeve.

[0082] The sides of the guide component 16 and the positioning component can fit together. When the guide component 16 and the positioning component fit together, the contoured openings on the sleeve clamping jaws 19 at the corresponding positions form contoured channels, which are convenient for introducing the rubber sleeve.

[0083] The positioning assembly includes a first positioning assembly 17 and a second positioning assembly 18. The first positioning assembly 17 is configured to clamp one end of the rubber sleeve and move it toward the other end of the frame platform 11, and the second positioning assembly 18 is used to position the other end of the rubber sleeve. When the rubber sleeve reaches the port of the first positioning assembly 17 through the contoured channel, the clamping member on the first positioning assembly 17 clamps one end of the rubber sleeve, and as the first positioning assembly 17 moves, the one end of the rubber sleeve is brought to the other end of the frame platform 11, and the second positioning assembly 18 fixes the other end of the rubber sleeve to achieve the positioning of the rubber sleeve.

[0084] In some embodiments, the guide assembly 16 includes a first mounting seat 161 connected to the top surface of the frame platform 11, and a sleeve mold clamping jaw 19 and a first clamping jaw cylinder 162 disposed on the first mounting seat 161, and the first clamping jaw cylinder 162 is used to drive the sleeve mold clamping jaw 19 to open and close;

[0085] The first positioning assembly 17 is arranged on the side of the guide assembly 16, and the first positioning assembly 17 includes a first driving module 171 extending along the length direction of the frame platform 11 on the frame platform 11, a second mounting seat 172 arranged on the first driving module 171, and a sleeve mold clamping jaw 19 and a second clamping jaw cylinder 173 arranged on the second mounting seat 172, and the second clamping jaw cylinder 173 is used to drive the sleeve mold clamping jaw 19 to open and close;

[0086] The second positioning assembly 18 is arranged on the side of the first positioning assembly 17 away from the guide assembly 16. The second positioning assembly 18 includes a second driving module 181 extending along the length direction of the frame platform 11 on the frame platform 11, a third mounting seat 182 arranged on the second driving module 181, and a sleeve mold clamp 19 and a third clamp cylinder 183 arranged on the third mounting seat 182. The third clamp cylinder 183 is used to drive the sleeve mold clamp 19 to open and close.

[0087] The control system can control the distance between the first positioning component 17 and the second positioning component 18 through the first driving module 171 and the second driving module 181 according to the length of the rubber sleeve.

[0088] Furthermore, if Figure 3As shown, the first positioning assembly 17 also includes a clamping assembly and a top block assembly. The clamping assembly includes an upper clamping arm 174 and a clamping cylinder 175 that drives the upper clamping arm 174 to clamp the rubber sleeve. Specifically, the clamping assembly is arranged on the third mounting seat 182 and is close to one side of the mold clamping jaw 19 of the first positioning assembly 17. The top block assembly is also mounted on the third mounting seat 182 and is relatively arranged on the other side of the mold clamping jaw 19 of the first positioning assembly 17. The top block assembly includes a contour top block 176 and a top block cylinder 177. Specifically, the contour top block 176 is facing the end face of the rubber sleeve. Under the action of the top block cylinder 177, the rubber sleeve extending out of the end face of the first positioning assembly 17 is pushed back to be flush with one end face of the first positioning assembly 17 to prevent the rubber sleeve from falling off from the positioning mechanism.

[0089] In this embodiment of the invention, Figure 4 As shown, the welding modules 32 are provided in plurality, and the plurality of welding modules 32 are distributed in an array and are all extended toward the center direction of the welding base 31;

[0090] The welding module 32 includes a stationary side template 321, a moving side template 322 and a connecting rod mold clamping device 323. The connecting rod mold clamping device 323 is arranged on the moving side template 322, and is used to drive the moving side template 322 to approach the stationary side template 321 for mold clamping welding. After the moving side template 322 and the stationary side template 321 are clamped, a multi-layer right-angle mold groove distributed up and down is formed.

[0091] In some embodiments, four welding modules 32 are provided, and the four welding modules 32 are distributed in a matrix and extend toward the center direction of the welding base 31. Every two groups of welding modules 32 cooperate to synchronously weld the diagonals of adjacent rubber sleeves to finally form a complete door seal.

[0092] In some embodiments, in combination Figure 5 and Figure 6As shown, the connecting rod mold clamping device 323 of the present invention includes a first base plate 3231, a first fixed component 3232, a second fixed component 3233, a first connecting rod 3234, a second connecting rod 3235 and a mold clamping drive component 3236. Specifically, the first fixed component 3232 is arranged on one side of the first base plate 3231, the second fixed component 3233 is arranged on the other side of the first base plate 3231, and the second fixed component 3233 is slidably connected to the first base plate 3231, the movable side template 322 is arranged on the second fixed component 3233, when the second fixed component 3233 slides, it can drive the movable side template 322 to slide, one end of the first connecting rod 3234 is hinged to the second fixed component 3233, and one end of the second connecting rod 3235 is hinged to the second fixed component 3233. The first fixed component 3232 is hinged, and the other end is hinged to the other end of the first connecting rod 3234, so that the first connecting rod 3234 and the second connecting rod 3235 cooperate with each other to form a V-shaped structure. The mold clamping drive component 3236 is arranged on the bottom plate, and the output end of the mold clamping drive component 3236 is hinged to the hinged end of the first connecting rod 3234 and the second connecting rod 3235. The mold clamping drive component 3236 is used to drive the angle between the first connecting rod 3234 and the second connecting rod 3235 to change so as to drive the moving side template 322 to move. By setting the first connecting rod 3234 and the second connecting rod 3235, when the mold clamping device is working, the output end of the mold clamping drive component 3236 outputs an action to drive the angle between the first connecting rod 3234 and the second connecting rod 3235 to increase, so as to drive the second fixed component 3233 to slide, thereby driving the moving side template 322 to slide.

[0093] Compared with the traditional mold clamping device, the connecting rod mold clamping device 323 of the present invention saves the lateral installation space of the welding module 32 to a great extent, so that the welding module 32 can handle longer or wider door seals without increasing the floor space of the welding system 3, and adapt to more diverse refrigerator door seal size requirements. In addition, the mold clamping drive component 3236 is arranged at the hinged end of the first connecting rod 3234 and the second connecting rod 3235. When the mold clamping drive component 3236 is driven, a smaller driving force can be converted into a larger punching force to increase the force of the mold clamping.

[0094] Furthermore, combined with Figure 4 , Figure 7 and Figure 8 As shown, the welding base 31 includes a base 311, a first driving assembly, a first driving bottom plate 312, a second driving bottom plate 313, two first driving plates 314 and two second driving plates 315. Specifically, the first driving assembly is longitudinally arranged on the base 311, and is used to drive the first driving bottom plate 312 and the second driving bottom plate 313 to move longitudinally on the base 311, and the first driving bottom plate 312 and the second driving bottom plate 313 are both transversely arranged on the base 311 and are parallel to each other.

[0095] In some embodiments, the specific structure of the first driving assembly can be any appropriate form known to those skilled in the art, such as a cylinder, a linear motor, etc. However, in a preferred example of the present invention, combined with the shape and arrangement of the first driving base plate 312 and the second driving base plate 313, considering that the first driving base plate 312 and the second driving base plate 313 can move stably and accurately, the specific structure of the first driving assembly can be as follows: Figure 7 Specifically, Figure 7 In the embodiment, the first driving assembly includes a base rail 3111, a base gear 3114, a base rack 3112 and a base motor 3113. Specifically, a plurality of base rails 3111 are provided, and the plurality of base rails 3111 are arranged on the base 311 in parallel and at intervals, and each base rail 3111 is correspondingly provided with a base rack 3112, and the two are respectively extended in the longitudinal direction, and the base gear 3114 is arranged at the output end of the base motor 3113. Under the action of the base motor 3113, the base gear 3114 cooperates with the base rack 3112 to drive the first driving bottom plate 312 and the second driving bottom plate 313 to move longitudinally on the base rail 3111.

[0096] Furthermore, if Figure 8 As shown, two symmetrically arranged first drive plates 314 and a second drive assembly are arranged on the first drive base plate 312. The second drive assembly includes a first drive base plate guide rail 3121, a first drive base plate gear 3124, a first drive base plate rack 3122 and a first drive base plate motor 3123. Specifically, the first drive base plate rack 3122 and the first drive base plate guide rail 3121 are both transversely arranged on the top surface of the first drive base plate 312, and the first drive base plate motor 3123 is arranged on the first drive plate 314, and its output end is connected to the first drive base plate gear 3124. The two first drive plates 314 are respectively provided with the moving side templates 322 of two adjacent welding modules 32. Under the drive of the second drive assembly, the first drive plate 314 moves laterally with the moving side template 322.

[0097] Similarly, two symmetrically arranged second drive plates 315 and a third drive assembly are arranged on the second drive base plate 313. The third drive assembly includes a second drive base plate guide rail 3131, a second drive base plate gear 3134, a second drive base plate rack 3132 and a second drive base plate motor 3133. Specifically, the second drive base plate rack 3132 and the second drive base plate guide rail 3131 are both transversely arranged on the top surface of the second drive base plate 313, and the second drive base plate motor 3133 is arranged on the second drive plate 315, and its output end is connected to the second drive base plate gear 3134. The two second drive plates 315 are respectively provided with the static side templates 321 of two adjacent welding modules 32. Under the drive of the third drive assembly, the second drive plates 315 move transversely with the static side templates 321.

[0098] It is understandable that in the present invention, the first driving base plate 312, the second driving base plate 313, the two first driving plates 314 and the two second driving plates 315 on the welding base 31 of the four welding modules 32 distributed in a matrix are symmetrically arranged in two groups.

[0099] Through the above technical solution, the four welding modules 32 distributed in a matrix can be moved to any position within the travel range on the above welding base 31, thereby further expanding the tolerance of the door seal product size during the welding process.

[0100] In this embodiment of the invention, Fig. 9 and Fig.10 As shown, the gripping system 2 includes a gripping frame 21, a y-axis gripping adjustment mechanism, an x-axis gripping adjustment mechanism, and a z-axis gripping adjustment mechanism. Through the adjustment mechanisms in three dimensions of the y-axis, x-axis, and z-axis, the system can achieve high-precision movement and positioning in three-dimensional space. The y-axis gripping adjustment mechanism allows adjustment in a direction perpendicular to the platform 1 to be welded, the x-axis gripping adjustment mechanism allows precise movement along the length direction of the platform 1 to be welded, and the z-axis gripping adjustment mechanism achieves lifting in the vertical direction, thereby ensuring that the material picking assembly 28 can accurately reach the specified gripping position.

[0101] Specifically, the grabbing frame 21 serves as the supporting structure of the entire grabbing system 2 and is disposed above the corresponding platform 1 to be welded, with one end extending above the welding position to ensure that the rubber sleeve positioned on the platform 1 to be welded can be grabbed and transferred to the welding position.

[0102] The y-axis grasping and adjusting mechanism is arranged on the grasping frame 21, and the y-axis grasping and adjusting mechanism includes a y-axis guide rail 22, a y-axis driving assembly 23 slidably connected to the y-axis guide rail 22, and a y-axis driving mechanism 24 that drives the y-axis driving assembly 23 to reciprocate linearly on the y-axis guide rail 22.

[0103] In some embodiments, a plurality of y-axis guide rails 22 may be provided, and the plurality of y-axis guide rails 22 are parallel to each other and spaced apart.

[0104] Furthermore, the y-axis driving assembly 23 includes a y-axis driving plate 231, a hanging plate 232, and a y-axis slider base 233. Specifically, the y-axis driving plate 231 extends along the y-axis direction, the y-axis slider base 233 is arranged on the bottom surface of the y-axis driving plate 231 and is slidably connected to the y-axis guide rail 22, and the hanging plate 232 is arranged on the bottom surface of the y-axis driving plate 231 and is vertically connected to the y-axis driving plate 231.

[0105] The specific structure of the y-axis driving mechanism 24 can be any appropriate form known to those skilled in the art, such as a cylinder, a linear motor, etc. Specifically, the y-axis driving mechanism 24 includes a y-axis driving motor 241 and a y-axis driving screw 242. The y-axis driving screw 242 is arranged at the output end of the y-axis driving motor 241, and the y-axis driving screw 242 is connected to the y-axis driving plate 231. Under the action of the y-axis driving mechanism 24, the y-axis driving screw 242 drives the y-axis driving plate 231 to move linearly back and forth on the y-axis guide rail 22.

[0106] In some embodiments, the number of the hanging plates 232 can be two, and the two hanging plates 232 are respectively disposed at two ends of the bottom surface of the y-axis driving plate 231 .

[0107] The x-axis grabbing and adjusting mechanism includes an x-axis driving module and a back plate 26 extending along the x-axis direction. The x-axis driving module is disposed on the back plate 26 , and the back plate 26 is connected to the hanging plate 232 .

[0108] In some embodiments, the x-axis driving module includes a first x-axis driving module 251 and a second x-axis driving module 252 , and the first x-axis driving module 251 and the second x-axis driving module 252 are respectively extended from two ends of the back plate 26 toward the middle position of the back plate 26 .

[0109] The z-axis grabbing and adjusting mechanism includes a z-axis driving module and a material picking assembly 28. Specifically, the z-axis driving module is connected to the x-axis driving module and is vertically arranged. The z-axis driving module can move linearly along the x-axis direction under the action of the x-axis driving module. The material picking assembly 28 is arranged on the z-axis driving module.

[0110] In some embodiments, the z-axis drive module includes a first z-axis drive module 271, a second z-axis drive module 272 and a third z-axis drive module 273, the first z-axis drive module 271 is set on the first x-axis drive module 251, the second z-axis drive module 272 is set on the second x-axis drive module 252, and the third z-axis drive module 273 is set on the back plate 26 between the first x-axis drive module 251 and the second x-axis drive module 252.

[0111] The material taking assembly 28 includes a translation cylinder assembly 281, a clamping jaw mounting plate 282, a clamping jaw driving cylinder 283 and a contour gripper 284. Specifically, the translation cylinder assembly 281 is slidably connected to the z-axis driving module for fine adjustment in the x-axis direction, the clamping jaw mounting plate 282 is connected to the output end of the translation cylinder assembly 281, and the clamping jaw driving cylinder 283 is installed on the clamping jaw mounting plate 282 to drive the opening and closing of the clamping jaw, thereby clamping or releasing the contour gripper 284, and the contour gripper 284 is provided with a plurality of contour notches arranged up and down.

[0112] In this embodiment of the invention, Fig.11 As shown, the pickup system 4 includes a pickup rack 41, a dual cylinder drive assembly and a pickup adjustment mechanism. Specifically, the pickup rack 41 is arranged above the welding system 3, with one end extending to the finished product area, and is used to transfer the welded door seal from the welding area to the finished product area.

[0113] The dual-cylinder drive assembly includes a mobile frame 42, and the mobile frame 42 is slidably connected to the pickup frame 41. The dual-cylinder drive assembly includes a first lifting cylinder assembly and a second lifting cylinder assembly. The first lifting cylinder assembly and the second lifting cylinder assembly are transmission-connected together. The first lifting cylinder assembly is used to perform the lifting of the first-stage stroke, and the second lifting cylinder assembly performs the lifting of the second-stage stroke based on the first-stage stroke. Through the staged lifting method, the dual-cylinder drive assembly can achieve a larger lifting height in a smaller vertical space. The superposition of the first-stage stroke and the second-stage stroke makes the entire lifting process more compact and efficient.

[0114] More specifically, combined with Fig.11 and Fig.12As shown, the first cylinder 43 driving assembly includes a first cylinder 43, a first connecting sleeve 431 and a second connecting sleeve 441, the first connecting sleeve 431 is fixedly connected to the mobile frame 42, and the second connecting sleeve 441 is slidably connected to the first connecting sleeve 431. It can be understood that the inner diameter of the first connecting sleeve 431 is greater than the outer diameter of the second connecting sleeve 441. By arranging a vertical guide rail on the outer wall of the second connecting sleeve 441 and arranging a slider at a corresponding position on the inner wall of the first connecting sleeve 431, the sliding connection between the second connecting sleeve 441 and the first connecting sleeve 431 can be achieved. The lower end of the cylinder barrel of the first cylinder 43 is arranged on the inner wall of the first connecting sleeve 431, and the lower end of the cylinder rod of the first cylinder 43 is connected to the second connecting sleeve 441.

[0115] The second cylinder 44 driving assembly includes a second cylinder 44, a vertically arranged connecting rod 45 and a connecting plate 451 arranged at the lower end of the connecting rod 45. The connecting rod 45 is slidably connected to the second connecting sleeve 441. Specifically, a vertical guide rail can be provided on the rod wall of the connecting rod 45, and a slider can be provided at a corresponding position on the inner wall of the second connecting sleeve 441 to achieve a sliding connection between the two. The lower end of the cylinder barrel of the second cylinder 44 is provided on the inner wall of the second connecting sleeve 441, and the lower end of the cylinder rod of the second cylinder 44 is connected to the connecting plate 451.

[0116] In summary, the specific working process of the dual-cylinder drive assembly is: first start the first cylinder 43, as the cylinder rod of the first cylinder 43 contracts, the second connecting sleeve 441 connected thereto begins to rise, and the rising movement of the second connecting sleeve 441 further drives the second cylinder 44 (and its attached connecting plate 451 and other structures) to rise as a whole, thereby achieving the lifting of the first-stage stroke. After the first-stage stroke is completed, the second cylinder 44 is then started, and as the cylinder rod of the second cylinder 44 contracts, the connecting plate 451 directly connected thereto begins to rise again, thereby achieving the lifting of the second-stage stroke.

[0117] By the sequential operation of the two-stage cylinders, not only can the lifting height of the product be increased to avoid interference with other equipment during the transfer process, but also in different lifting stages, the first cylinder 43 or the second cylinder 44 can be selectively started as needed to optimize the distribution of power. The lifting height and speed can be adjusted according to actual needs, thereby improving the efficiency of picking up items to a certain extent.

[0118] The picking adjustment mechanism is arranged at the output end of the dual-cylinder drive assembly and connected to the connecting plate 451. The picking adjustment mechanism is provided with at least eight position-adjustable picking claws 48, and at least two picking claws 48 are correspondingly provided on each side of the finished refrigerator door seal.

[0119] Furthermore, the pick-up adjustment mechanism includes two parallel y-axis adjustment beams 46, two parallel x-axis adjustment beams 47 and a pick-up clamp 48. Specifically, Fig.13 As shown, the y-axis adjustment beam 46 includes a beam connecting guide rail 461, a beam connecting slider 462 and a beam connecting block 463, the beam connecting block 463 is connected to the beam connecting slider 462, the beam connecting slider 462 is slidably connected to the beam connecting guide rail 461, and the two ends of the two x-axis adjustment beams 47 are respectively fixed on the beam connecting block 463.

[0120] A plurality of movable material-removing jaws 48 are disposed on the x-axis adjustment beam 47 and the y-axis adjustment beam 46 to ensure that at least two material-removing jaws 48 are disposed on each side of the finished refrigerator door seal.

[0121] On the other hand, the present invention also provides a method for welding a refrigerator door seal using the above-mentioned refrigerator door seal multi-section welding production line. Specifically, the welding method comprises:

[0122] Step 1: a plurality of platforms 1 to be welded respectively obtain a plurality of rubber sleeves, and position the plurality of rubber sleeves in layers;

[0123] Step 2: Start the grabbing system 2 to grab the multiple layers of the rubber sleeves between two adjacent welding modules 32;

[0124] Step 3: Start the two adjacent welding modules 32, and cooperate with the grabbing system to pass the two ends of the multi-layer rubber sleeve through the multi-layer mold grooves on the two adjacent welding modules 32 respectively;

[0125] Step 4: driving the plurality of welding modules 32 to synchronously weld the ends of two adjacent rubber sleeves of the multilayer;

[0126] Step 5: Start the retrieval system 4, take out the welded multi-layer door sealing frame from the welding system 3, and transfer it to the finished product area.

[0127] In step 1, the platform 1 to be welded is docked with the rubber sleeve conveyor line of different cross-sections. When the rubber sleeve is conveyed to the front of the platform 1 to be welded, the guide assembly 16, the first positioning assembly 17 and the second positioning assembly 18 located at one end of the frame platform 11 are in a merged state, and the multiple profiling ports on the sleeve mold clamping jaws 19 corresponding to the positions of the three form multiple profiling channels. Multiple rubber sleeves are simultaneously pushed into the profiling channels by the pushing assembly (not shown in the figure) from the multi-layer conveyor line (not shown in the figure). At this time, the sensor set on the platform 1 to be welded senses that the rubber sleeve has reached the port of the first positioning assembly 17, and the first positioning assembly The clamping assembly on 17 starts to work and clamps one side of the rubber sleeve. Then, the first positioning assembly 17 moves one end of the rubber sleeve to the other end of the frame platform 11, and the second positioning assembly 18 supports the other end of the rubber sleeve. In order to ensure the alignment accuracy and consistency during the welding process, it is necessary to ensure that the rubber sleeve is in a basically straightened state at this time. The photoelectric sensor 15 in the supporting mechanism detects the in-place signal of the rubber sleeve. The supporting cylinder 14 drives the multi-layer supporting plate 142 connected to the supporting rod 141 to extend forward according to the in-place signal to simultaneously support the middle part of the multi-layer rubber sleeve, thereby realizing accurate positioning of multiple rubber sleeves.

[0128] In step 2, step 3 and step 4, the gripping system 2 is started and the multiple rubber sleeves are grabbed by the contour gripper 284 at the same time, and moved to the vicinity of the welding module 32. Specifically, the gripping system 2 moves the rubber sleeve between two adjacent welding modules 32, and the moving edge templates 322 and the static edge templates 321 of the two adjacent welding modules 32 are separated from each other, so as to cooperate with the gripping system 2 to extend the two ends of the rubber sleeves on different platforms to be welded into the multi-layer mold grooves of the two adjacent moving edge templates 322 or the multi-layer mold grooves of the two adjacent static edge templates 321. Specifically, the rubber sleeves of each side of the multiple door seals can be synchronously molded at the same time. At this time, the four welding modules 32 are close to each other, the connecting rod mold clamping device 323 is started, the moving edge templates 322 and the static edge templates 321 of the four welding modules 32 are merged, and the ends of the two adjacent rubber sleeves are hot-melted. Specifically, the four rubber sleeves of the multiple door seals can be synchronously welded at the same time.

[0129] In step five, the picking system 4 is started to take out the welded multiple door seals from the welding module 32. After the rubber sleeve is welded, multiple complete door seals are formed. With the help of the picking system 4, the welded door seals can be transferred to the finished product area so that the welding module 32 can perform the next welding. The picking jaws 48 of the picking system 4 have multiple upper and lower contoured openings to facilitate the simultaneous grasping of multiple door seals.

[0130] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any appropriate manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A refrigerator door seal multi-section welding production line, characterized in that: include: A welding system (3), the welding system (3) comprising a plurality of welding modules (32), each of the welding modules (32) comprising a plurality of multi-layer mold grooves distributed in an upper and lower manner; A plurality of platforms to be welded (1) are arranged around the outside of the welding system (3), and each of the platforms to be welded (1) is used to dock with a rubber sleeve conveying line of different cross-sections to receive the rubber sleeve conveyed by the rubber sleeve conveying line and to position the rubber sleeve in layers; A plurality of gripping systems (2) are respectively arranged above the plurality of platforms to be welded (1), the gripping systems (2) being used to grip the plurality of rubber sleeves distributed in multiple layers on the platforms to be welded (1), and move them to the corresponding multiple layers of the mold grooves for synchronous welding; The retrieval system (4) is arranged above the welding system (3) and is used to transfer the welded multiple sets of door seals from the welding area to the finished product area.

2. The refrigerator door seal multi-section welding production line according to claim 1, characterized in that: The platform to be welded (1) comprises a frame platform (11) and a supporting mechanism and a positioning mechanism arranged on the frame platform (11); the supporting mechanism and the positioning mechanism are arranged in parallel and at intervals along the width direction of the frame platform (11).

3. The refrigerator door seal multi-section welding production line according to claim 2, characterized in that: The supporting mechanism comprises: A material supporting slide rail (12) is arranged on the frame platform (11) and extends along the length direction of the frame platform (11); A material supporting slide seat (13), wherein the material supporting slide seat (13) is slidably connected to the material supporting slide rail (12); A material supporting cylinder (14) is arranged on the top of the material supporting slide (13), the output end of the material supporting cylinder (14) is connected to a supporting rod (141) extending along the width direction of the frame platform (11), and a supporting plate (142) is arranged at the front end of the supporting rod (141); A photoelectric sensor (15) is arranged at the front end of the material supporting slide (13) and is used to monitor the rubber sleeve arrival signal.

4. The refrigerator door seal multi-section welding production line according to claim 2, characterized in that: The positioning mechanism comprises a guide component (16) and a positioning component whose sides can be fitted with each other, the guide component (16) is arranged at one end of the frame platform (11), the positioning component is movably arranged on the side of the guide component (16), and the guide component (16) and the positioning component are both provided with mold clamping claws (19) at corresponding positions; The positioning assembly comprises a first positioning assembly (17) and a second positioning assembly (18), wherein the first positioning assembly (17) is configured to clamp one end of the rubber sleeve and move it toward the other end of the frame platform (11), and the second positioning assembly (18) is used to position the other end of the rubber sleeve.

5. The refrigerator door seal multi-section welding production line according to claim 4, characterized in that: The first positioning component (17) comprises: A clamping assembly, which is closely attached to one side of the mold clamping jaw (19) of the first positioning assembly (17), and the clamping assembly comprises an upper clamping arm (174) and a clamping cylinder (175) for driving the upper clamping arm (174) to clamp the rubber sleeve; The top block assembly is arranged on the other side of the mold clamping jaw (19) of the first positioning assembly (17), and the top block assembly includes a contoured top block (176) facing the end surface of the rubber sleeve and a top block cylinder (177) for driving the top block.

6. The refrigerator door seal multi-section welding production line according to claim 1, characterized in that: The welding system (3) further comprises a welding base (31), and a plurality of welding modules (32) are distributed in an array and are all extended toward the center direction of the welding base (31); The welding module (32) comprises: a stationary side template (321), a movable side template (322) and a connecting rod mold clamping device (323); the connecting rod mold clamping device (323) is arranged on the movable side template (322) and is used to drive the movable side template (322) to approach the stationary side template (321) to perform mold clamping welding; the movable side template (322) and the stationary side template (321) form a right-angled mold groove after mold clamping.

7. The refrigerator door seal multi-section welding production line according to claim 6, characterized in that: The welding base (31) comprises: A base (311), wherein a first driving assembly extending longitudinally is disposed on the base (311); A first driving base plate (312) is disposed transversely on the base (311); A second driving base plate (313) is disposed transversely on the base (311) and is parallel to the first driving base plate (312); Two first driving plates (314) are symmetrically arranged on the first driving bottom plate (312) and are used to drive the lateral movement of the movable edge templates (322) of two adjacent welding modules (32); Two second driving plates (315) are symmetrically arranged on the second driving bottom plate (313) and are used to drive the lateral movement of the static side templates (321) of two adjacent welding modules (32); Wherein, the first driving assembly is used to drive the first driving base plate (312) and the second driving base plate (313) to move longitudinally.

8. The refrigerator door seal multi-section welding production line according to claim 1, characterized in that: The gripping system (2) comprises: A grabbing frame (21) is arranged above the corresponding platform to be welded (1), with one end extending above the welding position; A y-axis grabbing and adjusting mechanism is arranged on the grabbing frame (21), the y-axis grabbing and adjusting mechanism comprising a y-axis guide rail (22), a y-axis driving component (23) slidably connected to the y-axis guide rail (22), and a y-axis driving mechanism (24) driving the y-axis driving component (23) to linearly reciprocate on the y-axis guide rail (22); An x-axis grabbing and adjusting mechanism, comprising an x-axis driving module extending along the length direction of the platform (1) to be welded, wherein the x-axis driving module is connected to the bottom end of the y-axis driving assembly (23); The z-axis grabbing and adjusting mechanism comprises a z-axis driving module connected to the x-axis driving module and arranged vertically, wherein a material picking assembly (28) is arranged at the lower end of the z-axis driving module.

9. The refrigerator door seal multi-section welding production line according to claim 1, characterized in that: The pickup system (4) comprises: A piece-taking rack (41) is arranged above the welding system (3), with one end extending to the finished product area; A double cylinder driving assembly comprises a moving frame (42), wherein the moving frame (42) is slidably connected to the picking frame (41), and the double cylinder driving assembly comprises a first lifting cylinder assembly and a second lifting cylinder assembly, wherein the first lifting cylinder assembly and the second lifting cylinder assembly are drivingly connected together, wherein the first lifting cylinder assembly is used to perform lifting of a first stage stroke, and the second lifting cylinder assembly performs lifting of a second stage stroke based on the first stage stroke; The picking adjustment mechanism is arranged at the output end of the dual-cylinder drive assembly, and the picking adjustment mechanism is provided with at least eight position-adjustable picking jaws (48), and at least two picking jaws (48) are correspondingly arranged on each side of the finished refrigerator door seal.

10. A method for welding a refrigerator door seal using the refrigerator door seal multi-section welding production line according to any one of claims 1 to 9, characterized in that: include: A plurality of platforms to be welded (1) respectively obtain a plurality of rubber sleeves, and perform layered positioning on the plurality of rubber sleeves; Starting the grabbing system (2) to grab the multiple layers of the rubber sleeves between two adjacent welding modules (32); Starting two adjacent welding modules (32), and cooperating with the grabbing system to pass the two ends of the multi-layer rubber sleeve through the multi-layer mold grooves on the two adjacent welding modules (32); Driving a plurality of the welding modules (32) to synchronously weld the ends of two adjacent rubber sleeves of multiple layers; The retrieval system (4) is started to take out the welded multi-layer door sealing frame from the welding system (3) and transfer it to the finished product area.

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