Waist support air bag welding tool

Abstract

The utility model discloses a waist support air bag welding tool, which relates to the technical field of waist support air bag welding and comprises an inner welding bead welding die, a first outer welding bead welding die, an air pipe welding die, a second outer welding bead welding die and a felt plate welding die. The inner welding bead welding mold is used for welding an inner welding bead and forming a first semi-finished product structure, the first outer welding bead welding mold is used for welding an outer welding bead and forming a second semi-finished product structure, and the air pipe welding mold is used for welding an air pipe between a film on the outer side of the second semi-finished product structure and another film. The second outer welding bead welding mold is used for welding an outer welding bead between the film on the outer side of the second semi-finished product structure and the other film and forming a third semi-finished product structure; and the felt plate welding mold is used for welding the film on the outer layer of the third semi-finished product structure and the felt plate together. The waist support air bag welding tool can assist in welding of the waist support air bag, so that the welding strength is higher, and the quality of the waist support air bag is better.

Description

Technical Field

[0001] The utility model relates to the technical field of waist support air bag welding, in particular to a waist support air bag welding tool Background Art

[0002] With the increase in the number of cars and the improvement of people's living standards, consumers pay more and more attention to the driving comfort of cars. Among them, the lumbar support function of the seat will have a greater impact on the comfort of the car. For the car lumbar support, a multi-layer air bag is arranged inside it. The better the sealing of the air bag, the stronger the pressure-maintaining function of the lumbar support. The current lumbar support air bag is mainly composed of a felt board, a PU film and an air pipe. During welding, a high-frequency welding process is usually used to melt the multi-layer PU film and adhere it after cooling, and complete the welding between the PU film and the PU film, the welding between the PU film and the felt board, and the welding between the PU film and the air pipe, thereby completing the production of the entire lumbar support air bag. However, in the traditional welding process, the high-frequency welding equipment is directly operated manually and welded. In the process of manually operating the high-frequency equipment to weld, different welding depths often occur, which leads to different thicknesses at various positions at the welding point. The reliability of the connection at the thicker place is not enough, and the strength at the shallower place is insufficient. During use, the air bag is prone to leaking due to damage at the welding point. Therefore, there is an urgent need for a waist support air bag welding tool that can assist in air bag welding, so that the welding position has higher strength and the air bag has better quality. Utility Model Content

[0003] The purpose of the utility model is to provide a waist support air bag welding tool to solve the problems existing in the above-mentioned prior art, and can assist the waist support air bag welding to make the welding strength higher and the waist support air bag better in quality.

[0004] To achieve the above purpose, the utility model provides the following solutions:

[0005] The utility model provides a waist support air bag welding tool, comprising an inner weld bead welding mold, a first outer weld bead welding mold, an air pipe welding mold, a second outer weld bead welding mold and a felt plate welding mold, each mold is a high-frequency welding mold, the inner weld bead welding mold is used to weld the inner weld bead between two adjacent films and form a plurality of first semi-finished product structures, the first outer weld bead welding mold is used to weld the outer weld bead between two first semi-finished product structures and between the first semi-finished product structure and a film and form a second semi-finished product structure, the air pipe welding mold is used to weld the air pipe between the film on the outside of the second semi-finished product structure and another film, the second outer weld bead welding mold is used to weld the outer weld bead between the film on the outside of the second semi-finished product structure and the other film and form a third semi-finished product structure, and the felt plate welding mold is used to weld the film and the felt plate of the outer layer of the third semi-finished product structure together.

[0006] Preferably, each mold includes an upper mold and a lower mold, a welding part is arranged between the upper mold and the lower mold, the welding part is fixedly connected to the upper mold and / or the lower mold, the welding part can be connected to an external high-frequency welding device and generate heat, the welding parts on the inner weld bead welding mold and the first outer weld bead welding mold are both annular structures, the size of the welding part on the inner weld bead welding mold is smaller than the size of the welding part on the first outer weld bead welding mold; the trachea welding part includes a first trachea welding part and a second trachea welding part, the second trachea welding part and the first trachea welding part are respectively fixedly connected to the upper mold and the lower mold and have corresponding positions, the first trachea welding part and the second trachea welding part can be spliced ​​to form a welding hole; the welding part on the second outer weld bead welding mold is an annular structure with a notch; the welding part on the felt board welding mold is formed by a plurality of evenly distributed welding blocks.

[0007] Preferably, the upper mold includes an upper mold metal plate and an upper mold fixing plate, the upper side of the upper mold fixing plate is provided with a mounting groove, the upper mold metal plate is fixedly connected in the mounting groove, the welding part is fixedly connected to the lower side of the upper mold metal plate, the bottom of the mounting groove is provided with a fixing groove with the same shape as the welding part, the lower end of the welding part passes through the fixing groove and extends from the lower side of the upper mold fixing plate; the lower mold includes a base and a bottom mold, one side of the base is fixedly connected to the lower side of the bottom mold.

[0008] Preferably, a limiting structure is fixedly provided on the upper side of each of the lower dies, and the limiting structure includes a plurality of thickness limiting columns. The lower side of the upper die is parallel to the thickness limiting surface of the lower side of the upper die, and the position of each of the thickness limiting columns corresponds to the thickness limiting surface. Each of the thickness limiting columns can be pressed against the thickness limiting surface to control the thickness of the weld after melting.

[0009] Preferably, the limiting structure also includes a plurality of horizontal limiting columns, and the lower side of the upper mold is provided with a plurality of horizontal limiting holes extending in a direction perpendicular to the lower side surface of the upper mold, the position of each horizontal limiting hole corresponds to the horizontal limiting column, and each horizontal limiting column can be inserted into the corresponding horizontal limiting hole, and the side surface of each horizontal limiting column is in contact with the inner side wall of each horizontal limiting hole and can move along the horizontal limiting hole.

[0010] Preferably, the horizontal limit column includes a plurality of first limit columns and a plurality of second limit columns, and the horizontal limit hole includes a first limit hole and a second limit hole, each of the first limit holes is close to the edge of the upper mold and is arranged in sequence along the circumference of the upper mold, and each of the second limit holes is freely dispersed in the middle of the upper mold, and the position of each of the first limit columns corresponds to each of the first limit holes, and the position of each of the second limit columns corresponds to each of the second limit holes.

[0011] Preferably, an trachea fixing device is also provided on the lower mold of the trachea welding mold, and the trachea fixing device includes a fixing groove, a fixing piece and a fixing rod. The fixing piece is fixedly connected to the upper side of the lower mold, and the fixing groove extends from the fixing piece to the position of the trachea welding piece. One end of the fixing rod can be inserted into the trachea, and the fixing rod can be placed in the fixing groove. One end of the fixing rod away from the trachea can be against the fixing piece, and the other end can be clamped between the two layers of film with the trachea and extend into the welding hole together.

[0012] Preferably, the welding parts are all made of copper.

[0013] Compared with the prior art, the utility model has achieved the following technical effects:

[0014] The utility model provides a lumbar support air bag welding tool. During the welding process, an inner weld bead welding mold is first used to weld an inner weld bead between two layers of membranes to form a first semi-finished product structure. Then, a welding piece on a first outer weld bead welding mold is used to weld an outer weld bead between the two semi-finished product structures and between a semi-finished product structure and a membrane. An air bag can be formed between the two layers of membranes connected by the outer weld bead. Several first semi-finished product structures and a layer of membrane together form a second semi-finished product structure. Then, an air pipe is arranged between the outer side of the second semi-finished product structure and another layer of membrane. The air pipe is welded by an air pipe welding mold. Then, the outer weld bead is welded by a second outer weld bead welding mold. While forming another air bag, a third semi-finished product structure is formed. Finally, a felt plate welding mold is used to weld the felt plate to the outer side of the third semi-finished product structure. The welding and manufacturing of the lumbar support air bag is completed. Since the welding tool is used as an auxiliary in the entire welding process, it is convenient to control the thickness of the welding position during each welding process. This can also enhance the strength of the air bag welding position, thereby improving the quality of the lumbar support air bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A simplified structural diagram of the waist support air bag provided by the utility model;

[0017] Figure 2 An exploded view of a felt plate welding mold in a waist support air bag welding tool provided by the utility model;

[0018] Figure 3 for Figure 2 The three-dimensional structure diagram of the middle and lower molds;

[0019] Figure 4 A three-dimensional structural diagram of the inner weld bead welding mold in the waist support air bag welding tooling provided by the utility model;

[0020] Figure 5 for Figure 4 Top view of the lower die of the welding die for the inner and middle welds;

[0021] Figure 6 for Figure 4 Side view of the welding die for the inner and middle bead;

[0022] Figure 7 A three-dimensional structural diagram of the first outer weld bead welding mold in the waist support air bag welding tooling provided by the utility model;

[0023] Figure 8 for Figure 7 A top view of the lower die of the first outer weld bead welding die;

[0024] Fig. 9 for Figure 7 A side view of the first outer weld bead welding die;

[0025] Fig.10 A top view of the lower die of the air pipe welding die in the waist support air bag welding tooling provided by the utility model;

[0026] Fig.11 A side view of the air pipe welding mold in the waist support air bag welding tool provided by the utility model;

[0027] Fig.12 A three-dimensional structural diagram of the second outer weld bead welding mold in the waist support air bag welding tooling provided by the utility model;

[0028] Fig.13 for Fig.12 A top view of the lower die of the second outer weld bead welding die;

[0029] Fig.14 for Fig.12 A side view of the second outer weld bead welding die;

[0030] Fig.15 A three-dimensional structural diagram of a felt plate welding mold in a waist support air bag welding tool provided by the utility model;

[0031] Fig.16 for Fig.15 Top view of the lower die of the middle felt plate welding die;

[0032] Fig.17 for Fig.15 Side view of the welding mold for the middle felt plate;

[0033] Fig.18 A top view of the lower die of the inner weld welding die when double air bags are arranged between two layers of film;

[0034] Fig.19 A top view of the lower die of the first outer weld bead welding die when double air bags are arranged between two layers of film;

[0035] Fig. 20 A top view of the lower die of the second outer weld bead welding die when double air bags are arranged between two layers of film;

[0036] Fig.21 It is a top view of the lower mold of the felt plate welding mold when double air bags are set between two layers of film;

[0037] Fig. 22 A top view of the lower mold of the air tube welding mold when double air bags are set between two layers of film;

[0038] In the figure: 1-inner weld bead welding mold, 2-first outer weld bead welding mold, 3-trachea welding mold, 4-second outer weld bead welding mold, 5-felt plate welding mold, 6-upper mold, 61-upper mold metal plate, 62-upper mold fixing plate, 7-lower mold, 71-base, 72-bottom mold, 73-trachea fixing device, 731-fixing groove, 732-fixing piece, 733-fixing rod, 8-welding piece, 9-limiting structure, 91-thickness limiting column, 92-horizontal limiting hole, 93-horizontal limiting column, 931-first limiting column, 932-second limiting column. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] The utility model aims to provide a waist support air bag welding tool to solve the problems existing in the prior art and can assist the waist support air bag welding to make the welding strength higher and the waist support air bag better in quality.

[0041] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0042] The waist support air bag welding tool provided by the utility model is used for welding and manufacturing the waist support air bag of an automobile. In the existing welding of the waist support air bag of an automobile, for example Figure 1As shown, A is a felt board, B, C, D, E, F, G are all PU films, H is an air tube, I is an outer weld, and J is an inner weld. During the welding process, the inner weld J between the film C and the film D, and between the film E and the film F are first welded, and two first semi-finished product structures are formed respectively (film C and film D, film E and film F), then the outer welds between the film D and the film E, and between the film F and the film G are welded, and two air bags are formed between the film D and the film E, and between the film F and the film G, respectively. The film C, film D, film E, film F and film G form a second semi-finished product structure as a whole, and then the air tube H is welded between the film B and the film C, and then the outer weld between the film B and the film C is welded to form an air bag provided with an air tube. At this time, the film B, film C, film D, film E, film F and film G form a third semi-finished product structure as a whole, and finally the felt board A and the film B located outside the third semi-finished product structure are welded together to complete the welding and production of the entire waist support air bag. Among them, holes are punched in advance on the film C, the film D, the film E and the film F to connect the air bags for easy inflation.

[0043] The utility model provides a waist support air bag welding tool, such as Figure 2-21 As shown, it includes an inner weld bead welding mold 1, a first outer weld bead welding mold 2, an air pipe welding mold 3, a second outer weld bead welding mold 4 and a felt plate welding mold 5, each of which is a high-frequency welding mold. The inner weld bead welding mold 1 is used to weld the inner weld bead between two adjacent membranes and form a plurality of first semi-finished product structures. The first outer weld bead welding mold 2 is used to weld the outer weld bead between two first semi-finished product structures and between the first semi-finished product structure and a membrane and form a second semi-finished product structure. The air pipe welding mold 3 is used to weld the air pipe between the membrane on the outside of the second semi-finished product structure and another membrane. The second outer weld bead welding mold 4 is used to weld the outer weld bead between the membrane on the outside of the second semi-finished product structure and another membrane and form a third semi-finished product structure. The felt plate welding mold 5 is used to weld the membrane and the felt plate of the outer layer of the third semi-finished product structure together.

[0044] The utility model provides a waist support air bag welding tool. During the welding process, first use Figure 4-6 The inner weld bead welding mold 1 shown in the figure welds the inner weld bead between the two layers of film and forms a first semi-finished product structure, and then uses Figure 7-9 The welding piece 8 on the first outer weld bead welding mold 2 shown in the figure welds the outer weld bead between two semi-finished structures and between a semi-finished structure and a film, and an air bag can be formed between the two layers of film connected by the outer weld bead; a plurality of first semi-finished structures and a layer of film together form a second semi-finished structure, and then the air pipe is arranged between the outer side of the second semi-finished structure and another layer of film, and the air bag is formed by the outer weld bead between the two layers of film connected by the outer weld bead; Figure 10-11 The trachea welding mold 3 shown in the figure welds the trachea, and then passes through Figure 12-14 The second outer weld bead welding mold 4 shown in the figure welds the outer weld bead, and forms another air bag while forming a third semi-finished product structure as a whole, and finally uses Figure 15-17 The felt plate welding mold 5 shown welds the felt plate to the outside of the third semi-finished product structure to complete the welding and manufacturing of the lumbar support airbag. Since welding tooling is used as an auxiliary in the entire welding process, it is convenient to control the thickness of the welding position during each welding process, and the strength of the welding position of the airbag can be enhanced, thereby improving the quality of the airbag.

[0045] It should be noted that, for the lumbar support air bag welding tooling provided by the utility model, the number of first semi-finished product structures can be manufactured according to the number of air bags required. When one air bag needs to be set when welding using the first outer weld bead connecting mold, only one first semi-finished product structure needs to be manufactured and welded with a layer of film. When two air bags need to be set when welding using the first outer weld bead connecting mold, two first semi-finished products need to be manufactured, the two first semi-finished products are welded to each other, and one of the first semi-finished products is welded to a layer of film.

[0046] In a preferred implementation manner of the present embodiment, each mold includes an upper mold 6 and a lower mold 7, a welding piece 8 is arranged between the upper mold 6 and the lower mold 7, the welding piece 8 is fixedly connected to the upper mold 6 and / or the lower mold 7, the welding piece 8 can be connected to an external high-frequency welding device and generate heat, the welding pieces 8 on the inner weld bead welding mold 1 and the first outer weld bead welding mold 2 are both annular, the size of the welding piece 8 on the inner weld bead welding mold 1 is smaller than the size of the welding piece 8 on the first outer weld bead welding mold 2, and sufficient space for outer weld bead welding can be left between the inner weld bead and the edge of the film, thereby facilitating the subsequent welding steps; the trachea welding piece 8 includes a first trachea welding piece 8 and a second trachea welding piece 8, the first The second air pipe welding piece 8 and the first air pipe welding piece 8 are respectively fixedly connected to the upper mold 6 and the lower mold 7 and the positions correspond. The first air pipe welding piece 8 and the second air pipe welding piece 8 can be spliced ​​to form a welding hole. During the welding of the air pipe, the air pipe is clamped between the second semi-finished structure and another layer of film, so that the second semi-finished structure and another layer of film wrap the outer side of the welding position, and the second semi-finished structure, another layer of film and the air pipe are inserted into the welding hole together to complete the welding of the air pipe; the welding piece 8 on the second outer weld welding mold 4 is an annular structure with a notch, and the function of the notch is to place the air pipe that has been welded; the welding piece 8 on the felt board welding mold 5 is formed by a plurality of evenly distributed welding blocks. Among them, the air pipe is made of polyether or polyester.

[0047] In addition, you can also use Figure 18-22 The inner bead welding mold 1, the first outer bead welding mold 2, the air pipe welding mold 3, the second outer bead welding mold 4 and the felt plate welding mold 5 are shown to set two air bags side by side between the two layers of film to further enhance the function of the lumbar support air bag.

[0048] In a preferred implementation of this embodiment, the upper mold 6 includes an upper mold metal plate 61 and an upper mold fixing plate 62. The upper side of the upper mold fixing plate 62 is provided with a mounting groove. The upper mold metal plate 61 is fixedly connected in the mounting groove. The welding piece 8 is fixedly connected to the lower side of the upper mold metal plate 61. The bottom of the mounting groove is provided with a fixing groove 731 of the same shape as the welding piece 8. The lower end of the welding piece 8 passes through the fixing groove 731 and extends out from the lower side of the upper mold fixing plate 62. The lower mold 7 includes a base 71 and a bottom mold 72. One side of the base 71 is fixedly connected to the lower side of the bottom mold 72. The upper mold metal plate 61 is used to connect with a high-frequency device to conduct current to the welding piece 8. The upper mold fixing plate 62 is preferably made of an insulating material and is used to connect with other equipment (such as a lifting device) to facilitate the fixing and movement of the upper mold 6. The base 71 can improve the stability of the lower mold 7 when it is placed on a working plane.

[0049] In a preferred implementation manner of the present embodiment, a limiting structure 9 is fixedly provided on the upper side of each lower mold 7, and the limiting structure 9 includes a plurality of thickness limiting columns 91. The lower side of the upper mold 6 is parallel to the thickness limiting surface of the lower side of the upper mold 6. The position of each thickness limiting column 91 corresponds to the thickness limiting surface. Each thickness limiting column 91 can be pressed against the thickness limiting surface to control the thickness of the weld after melting. Before welding, the lower end of the welding part 8 is placed on the unmelted film. At this time, the distance between the upper end of the thickness limiting column 91 and the thickness limiting surface is the difference between the thickness of the unmelted film and the thickness of the melted film (for example, when welding two layers of film, the sum of the thickness of the two layers of film is 0.8mm before melting. After calculation, the sum of the thickness of the two layers of film after melting is 0.5mm, which can meet the airbag strength requirements. At this time, the distance between the thickness limiting column 91 and the thickness limiting surface is directly set to 0.3mm). When the film is heated and melted, and the thickness reaches the requirement, the upper end of the thickness limiting column 91 can be pressed against the thickness limiting surface, thereby realizing the control of the welding thickness and improving the quality of the waist support airbag. Among them, a plurality of thickness limiting holes are set on the lower side of the upper mold 6, and the top surface of the thickness limiting hole is the thickness limiting surface.

[0050] In a preferred implementation of this embodiment, the limiting structure 9 further includes a plurality of horizontal limiting posts 93. The lower side of the upper mold 6 is provided with a plurality of horizontal limiting holes 92 extending in a direction perpendicular to the lower side surface of the upper mold 6. The position of each horizontal limiting hole 92 corresponds to the horizontal limiting post 93. Each horizontal limiting post 93 can be inserted into the corresponding horizontal limiting hole 92. The side surface of each horizontal limiting post 93 is attached to the inner side wall of each horizontal limiting hole 92 and can move along the horizontal limiting hole 92. The horizontal limiting post 93 can control the horizontal position of the upper mold 6 relative to the lower film during the welding process, thereby preventing the upper mold 6 from shifting, so that the upper mold 6 can only move in a direction perpendicular to the side surface of the lower mold 7, reducing the welding error and improving the quality of the airbag.

[0051] In a preferred implementation of the present embodiment, the horizontal limiting column 93 includes a plurality of first limiting columns 931 and a plurality of second limiting columns 932, and the horizontal limiting hole 92 includes a first limiting hole and a second limiting hole, each first limiting hole is close to the edge of the upper mold 6 and is sequentially arranged along the circumference of the upper mold 6, and each second limiting hole is freely dispersed in the middle of the upper mold 6, and the position of each first limiting column 931 corresponds to each first limiting hole, and the position of each second limiting column 932 corresponds to each second limiting hole. Providing the first limiting column 931 and the second limiting column 932 can further improve the limiting capacity in the horizontal direction and further reduce the welding error.

[0052] In a preferred implementation manner of the present embodiment, an trachea fixing device 73 is also provided on the lower mold 7 of the trachea welding mold 3. The trachea fixing device 73 includes a fixing groove 731, a fixing piece 732 and a fixing rod 733. The fixing piece 732 is fixedly connected to the upper side of the lower mold 7. The fixing groove 731 extends from the fixing piece 732 to the position of the trachea welding piece 8. One end of the fixing rod 733 can be inserted into the trachea. The fixing rod 733 can be placed in the fixing groove 731. The end of the fixing rod 733 away from the trachea can be against the fixing piece 732, and the other end can be clamped between the two layers of film with the trachea and extend into the welding hole together. During the welding of the air pipe, one end of the fixing rod 733 is inserted into the air pipe, and the air pipe and the fixing rod 733 are sandwiched between the second semi-finished product structure and a layer of film. Then, the fixing rod 733 is set in the fixing groove 731, so that the end of the fixing rod 733 away from the air pipe is against the fixing piece 732, and the other end is placed in the welding hole together with the air pipe and the PU film. The fixing piece 732 can prevent the air pipe from moving during the welding process, thereby improving the welding quality. Among them, the fixing piece 732 can be in various forms such as a clamp, a fixture, etc.

[0053] In a preferred implementation of this embodiment, the welding parts 8 are all made of copper. The copper welding parts 8 can meet the electrical conductivity requirements and the strength requirements of the welding parts 8.

[0054] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A waist support air bag welding tool, characterized by: It includes an inner weld bead welding mold, a first outer weld bead welding mold, an air pipe welding mold, a second outer weld bead welding mold and a felt plate welding mold, each of which is a high-frequency welding mold. The inner weld bead welding mold is used to weld the inner weld bead between two adjacent membranes and form a plurality of first semi-finished structures. The first outer weld bead welding mold is used to weld the outer weld bead between two first semi-finished structures and between the first semi-finished structure and a membrane and form a second semi-finished structure. The air pipe welding mold is used to weld the air pipe between the membrane on the outside of the second semi-finished structure and another membrane. The second outer weld bead welding mold is used to weld the outer weld bead between the membrane on the outside of the second semi-finished structure and the other membrane and form a third semi-finished structure. The felt plate welding mold is used to weld the membrane and the felt plate on the outer layer of the third semi-finished structure together.

2. The waist support airbag welding tool according to claim 1, characterized in that: Each mold includes an upper mold and a lower mold, and a welding part is arranged between the upper mold and the lower mold, and the welding part is fixedly connected to the upper mold and / or the lower mold, and the welding part can be connected to an external high-frequency welding device and generate heat, and the welding parts on the inner weld bead welding mold and the first outer weld bead welding mold are both annular structures, and the size of the welding part on the inner weld bead welding mold is smaller than the size of the welding part on the first outer weld bead welding mold; the trachea welding part includes a first trachea welding part and a second trachea welding part, and the second trachea welding part and the first trachea welding part are respectively fixedly connected to the upper mold and the lower mold and have corresponding positions, and the first trachea welding part and the second trachea welding part can be spliced ​​to form a welding hole; the welding part on the second outer weld bead welding mold is an annular structure with a notch; the welding part on the felt board welding mold is formed by a plurality of evenly distributed welding blocks.

3. The waist support airbag welding tool according to claim 2, characterized in that: The upper mold includes an upper mold metal plate and an upper mold fixing plate, the upper side of the upper mold fixing plate is provided with a mounting groove, the upper mold metal plate is fixedly connected in the mounting groove, the welding part is fixedly connected to the lower side of the upper mold metal plate, the bottom of the mounting groove is provided with a fixing groove with the same shape as the welding part, the lower end of the welding part passes through the fixing groove and extends out from the lower side of the upper mold fixing plate; the lower mold includes a base and a bottom mold, one side of the base is fixedly connected to the lower side of the bottom mold.

4. The waist support airbag welding tool according to claim 2, characterized in that: A limiting structure is fixedly arranged on the upper side of each lower mold, and the limiting structure includes a plurality of thickness limiting columns. The lower side of the upper mold is parallel to the thickness limiting surface of the lower side of the upper mold. The position of each thickness limiting column corresponds to the thickness limiting surface. Each thickness limiting column can be pressed against the thickness limiting surface to control the thickness of the weld after melting.

5. The waist support airbag welding tool according to claim 4, characterized in that: The limiting structure also includes a plurality of horizontal limiting columns, and the lower side of the upper mold is provided with a plurality of horizontal limiting holes extending in a direction perpendicular to the lower side surface of the upper mold, the position of each horizontal limiting hole corresponds to the horizontal limiting column, and each horizontal limiting column can be inserted into the corresponding horizontal limiting hole, and the side surface of each horizontal limiting column is in contact with the inner side wall of each horizontal limiting hole and can move along the horizontal limiting hole.

6. The waist support airbag welding tool according to claim 5, characterized in that: The horizontal limiting column includes a plurality of first limiting columns and a plurality of second limiting columns, and the horizontal limiting hole includes a first limiting hole and a second limiting hole. Each of the first limiting holes is close to the edge of the upper mold and is arranged in sequence along the circumference of the upper mold, and each of the second limiting holes is freely dispersed in the middle of the upper mold. The position of each of the first limiting columns corresponds to each of the first limiting holes, and the position of each of the second limiting columns corresponds to each of the second limiting holes.

7. The waist support airbag welding tool according to claim 2, characterized in that: The lower mold of the trachea welding mold is also provided with an trachea fixing device, which includes a fixing groove, a fixing piece and a fixing rod. The fixing piece is fixedly connected to the upper side of the lower mold, and the fixing groove extends from the fixing piece to the position of the trachea welding piece. One end of the fixing rod can be inserted into the trachea, and the fixing rod can be placed in the fixing groove. The end of the fixing rod away from the trachea can be against the fixing piece, and the other end can be clamped between the two layers of film with the trachea and extend into the welding hole together.

8. The waist support airbag welding tool according to claim 2, characterized in that: The welding parts are all made of copper.

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