A sealing gasket and its processing method and production equipment

Abstract

The present invention discloses a sealing gasket and a processing method and production equipment thereof, comprising a sealing gasket body of an annular structure, wherein a plurality of through-holes are distributed at intervals along the circumferential direction on the sealing gasket body, wherein the sealing gasket body comprises an upper gasket, a metal ring sheet and a lower gasket which are fixedly connected in sequence, wherein the metal ring sheet is a stamped butterfly structure, and when the sealing gasket body is connected between two flange end faces, the preload force between the sealing gasket body and the flange is increased by the deformation of the metal ring sheet. The main purpose of the present invention is to provide a sealing gasket with stable and reliable sealing performance and long service life.

Description

Technical Field

[0001] The invention relates to a sealing gasket, in particular to a sealing gasket and a processing method and production equipment thereof. Background Art

[0002] Sealing gaskets are mainly used for sealing connections between pipes and between parts of machinery and equipment. Sealing gaskets are mainly made of non-metallic elastic materials, such as rubber or silicone. When used, they fill the unevenness of the flange surface or the joint surface of the parts through their own elastic deformation, thereby cutting off the leakage channel, increasing the leakage resistance, and improving the sealing reliability.

[0003] Traditional sealing gaskets are usually injection molded with rubber or silicone materials, but after long-term use, sealing gaskets with this structure are prone to deterioration in sealing performance due to material aging and other reasons.

[0004] In the prior art, a Chinese patent with publication number CN107214239A discloses a method for locking a spark plug sealing gasket and a method for manufacturing a sealing gasket and a gasket, wherein a sealing gasket with a curved upward locking boss is used. When installing the sealing gasket, the sealing gasket is inserted from the ignition end of the spark plug and passed through the thread of the metal shell of the spark plug to the back cutter groove, and the protrusion of the curved upward locking boss is attached to the outer cylindrical support surface of the metal shell; then, an operating plane is used to press the inner cylindrical outer side of the protrusion of the curved upward locking boss. Under the pressure of the operating plane, the protrusion of the curved upward locking boss undergoes material deformation, that is, the protrusion material of the curved upward locking boss is gradually flattened, and in the process of flattening the curved upward locking boss, the protrusion part of the curved upward locking boss extends toward the thread of the metal shell of the spark plug to the back cutter groove, so that the inner diameter of the entire sealing gasket becomes smaller, forming a locking mouth, thereby preventing the sealing gasket from falling off the spark plug. Although this technical solution can achieve stable and effective sealing, the sealing gasket in this technical solution is only made of metal material. If the sealing performance that meets the production requirements is to be achieved, the processing accuracy of the sealing gasket is required to be high. Higher processing accuracy corresponds to higher manufacturing costs and lower processing efficiency. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a sealing gasket with stable and reliable sealing performance, long service life and high assembly efficiency, and a processing method and production equipment thereof.

[0006] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0007] A sealing gasket comprises a sealing gasket body of an annular structure, wherein a plurality of through-holes are distributed at intervals along the circumferential direction on the sealing gasket body, wherein the sealing gasket body comprises an upper gasket, a metal ring sheet and a lower gasket fixedly connected in sequence, wherein the metal ring sheet is a stamped butterfly structure, and when the sealing gasket body is connected between two flange end faces, the preload force between the sealing gasket body and the flange is increased by the deformation of the metal ring sheet.

[0008] Furthermore, the outer side surface 1 of the upper pad and the outer side surface 2 of the lower pad are both working surfaces in contact with the flange or parts, the outer side surface 1 is provided with an annular recessed portion 1, and the outer side surface 2 is provided with an annular recessed portion 2, and the recessed portion 1 and the recessed portion 2 are respectively located on the side away from the metal ring sheet.

[0009] Furthermore, a flange is provided at the outer edge of the upper pad, the flange is covered on the outer side of the outer edge surface of the metal ring sheet, and the flange is engaged with the lower pad.

[0010] Furthermore, the cone angle of the metal ring piece is 140-170 degrees.

[0011] Furthermore, the upper pad and the lower pad are both made of a silica gel material containing quartz powder and polyethylene powder.

[0012] Furthermore, the clearance hole is a waist-shaped hole.

[0013] Furthermore, the metal ring sheet is made of martensitic stainless steel plate or aluminum alloy plate.

[0014] A processing method, applicable to the above-mentioned sealing gasket, specifically comprises the following steps:

[0015] S1. Take a piece of circular metal sheet;

[0016] S2, punching into a butterfly-shaped structure by a punching machine;

[0017] S3, deburring and surface polishing;

[0018] S4, surface galvanizing, that is, completing the processing of the metal ring;

[0019] S5, metal ring piece dipping treatment;

[0020] S6. Take the injection-molded upper pad and lower pad and bond them to the two sides of the metal ring respectively.

[0021] A production equipment, suitable for the above-mentioned sealing gasket, includes a processing device and a conveying device 1 for conveying an upper pad, a conveying device 2 for conveying a metal ring sheet after dipping in glue, and a conveying device 3 for conveying a lower pad. The processing device is movably installed on a track, and the conveying device 1, the conveying device 2 and the conveying device 3 are arranged sequentially along the track. When the processing device moves along the track to the corresponding stations of the conveying device 1, the conveying device 2 and the conveying device 3 in sequence, the conveying device 1, the conveying device 2 and the conveying device 3 respectively move the upper pad, the metal ring sheet and the lower pad to the processing device and assemble them at one time to form a sealing gasket.

[0022] Furthermore, it also includes a transfer device, which includes a rotatably installed containing plate, and a positioning column 2 is provided on the containing plate for limiting the sealing gasket. When the processing device moves along the track to the workstation corresponding to the transfer device, the assembled sealing gasket is moved to the containing plate by pushing the component and limited by the positioning column 2. A matching groove is provided at the position of the containing plate corresponding to the sealing gasket. When the containing plate is rotated to a horizontal state, the lifting plate located below the matching groove rises and passes through the matching groove to eject the sealing gasket.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: the sealing gasket of the present invention adopts a metal ring sheet that is stamped and formed in one time without cutting, and cooperates with an upper gasket and a lower gasket made of silicone material. When in use, the metal ring sheet is squeezed and deformed, and the force generated during the deformation is used to always maintain a pre-tightening effect on the connecting surfaces of the two flanges or parts, thereby avoiding the degradation of the sealing performance due to the degradation of the silicone performance after long-term use; at the same time, the upper gasket, the metal ring sheet and the lower gasket are assembled in one time through specially designed production equipment, with a high degree of automation and greatly improved assembly efficiency; avoiding the need for assembly and molding in two times when using traditional assembly technology, resulting in increased transportation costs, low assembly efficiency, and impurities easily sticking to the assembly surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A three-dimensional diagram of a sealing gasket of the present invention;

[0025] Figure 2 A three-dimensional diagram of a sealing gasket of the present invention (from another perspective);

[0026] Figure 3 It is a front view of a sealing gasket of the present invention;

[0027] Figure 4 for Figure 3 Schematic diagram of the cross section cut along the AA direction;

[0028] Figure 5 for Figure 4Schematic diagram of cross-section breakdown of the sealing gasket;

[0029] Figure 6 It is a structural schematic diagram of a production equipment of the present invention;

[0030] Figure 7 It is a structural schematic diagram of a transfer device in a production equipment of the present invention;

[0031] Figure 8 A flow chart of a processing method of the present invention;

[0032] Among them, 1. upper pad; 11. outer side surface one; 111. recessed portion one; 12. flange; 121. insert ring; 13. inner side surface one; 2. lower pad; 21. outer side surface two; 211. recessed portion two; 22. ring groove; 23. inner side surface two; 3. clearance hole; 4. metal ring sheet; 41. outer edge surface; 5. processing device; 51. positioning column one; 52. core column; 53. push plate; 54. driving cylinder; 6. conveying device one; 61. moving component one; 62. support rod one; 7. conveying device two; 71. moving component two; 72. support rod two; 8. conveying device three; 81. moving component three; 82. support rod three; 9. transfer device; 91. accommodating plate; 911. matching groove; 92. positioning column two; 93. lifting plate. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] It should be noted that, in the description of the technical solution of the present invention, some directional words used to clearly describe the technical features of the present invention, such as "front", "back", "up", "down", "top", "bottom", "inside", "outside", etc., are all in accordance with the orientation of the drawings of the present invention.

[0035] Example

[0036] like Figure 1 , Figure 2 and Figure 3As shown, a sealing gasket of this embodiment is sealed and connected between two flanges or parts. The sealing gasket includes a sealing gasket body of an annular structure. A plurality of clearance holes 3 are arranged at intervals along the circumferential direction on the sealing gasket body. The clearance holes 3 correspond to the bolt holes on the flange or part. When the sealing gasket body is installed, the bolts pass through the bolt holes on the flange or part and the clearance holes 3 on the sealing gasket body in sequence and are fastened by nuts. The sealing gasket body includes an upper pad 1, a metal ring sheet 4 and a lower pad 2 which are fixed in sequence. The upper pad 1 and the lower pad 2 are injection molded with a silicone material containing quartz powder and polyethylene powder, and have good wear resistance; and in order to maintain a better elastic coefficient, the hardness of the upper pad 1 and the lower pad 2 in this embodiment is less than 85. The metal ring sheet 4 is a stamped butterfly structure. When the sealing gasket body is connected between two flanges or two parts, the preload between the sealing gasket body and the flange or part is increased by the deformation of the metal ring sheet 4. At the same time, in order to cooperate with the deformation of the metal ring sheet 4 and avoid interference, the clearance hole 3 is designed as a waist-shaped hole in this embodiment.

[0037] like Figure 4 and Figure 5 As shown, in this embodiment, the inner edge of the metal ring piece 4 is the small end, the outer edge is the large end, and the cone angle of the metal ring piece 4 is 140-170 degrees. In this embodiment, the cone angle of the metal ring piece 4 is preferably 160 degrees, and the metal ring piece 4 is made of a martensitic stainless steel plate or an aluminum alloy plate or other metal plates with certain elastic deformation and recovery capabilities. The inner edge of the metal ring piece 4 is located on the side close to the lower pad 2, and the outer edge of the metal ring piece 4 is located on the side close to the upper pad 1. The inner side surface 13 of the upper pad 1 and the inner side surface 23 of the lower pad 2 are respectively fitted with the inner and outer sides of the metal ring piece 4, and the upper pad 1 and the metal ring piece 4 and the lower pad 2 and the metal ring piece 4 are all connected by adhesive. At the same time, a flange 12 is provided at the outer edge of the upper pad 1, and the flange 12 is covered on the outside of the outer edge surface 41 of the metal ring piece 4, and the flange 12 is matched with the lower pad 2. Specifically, the flange 12 is provided with an insert ring 121, which is a sealing ring structure, and the cross section of the insert ring 121 is rectangular or wedge-shaped. A matching annular groove 22 is provided at a corresponding position of the lower pad 2. When the upper pad 1, the metal ring sheet 4 and the lower pad 2 are assembled together, the insert ring 121 is correspondingly inserted into the annular groove 22 to achieve the connection between the upper pad 1 and the lower pad 2, and completely cover the metal ring sheet 4 to prevent the outer edge of the metal ring sheet 4 from being exposed to the outside, which is easy to crack due to extrusion or corrosion from the external environment.

[0038] In addition, the outer side surface 11 of the upper pad 1 and the outer side surface 21 of the lower pad 2 are both working surfaces in contact with flanges or parts. An annular recessed portion 111 is provided on the outer side surface 11, and an annular recessed portion 211 is provided on the outer side surface 21. The recessed portion 111 and the recessed portion 211 are respectively located on the side away from the metal ring sheet 4. Specifically, the recessed portion 111 is located at the inner edge of the upper pad 1, and the cross section of the recessed portion 111 is a triangular or arc-shaped structure. The recessed portion 211 is located at the outer edge of the lower pad 2, and the cross section of the recessed portion 211 is an arc-shaped structure. The maximum depth of the recessed portion 111 and the recessed portion 211 is within the range of 1 / 5-1 / 4 of the height of the metal ring sheet 4.

[0039] During installation, the sealing gasket body is placed between two flanges or parts, and the bolts are passed through the bolt holes on the flanges or parts and the clearance holes 3 on the sealing gasket body in turn, and are tightened by nuts; during the tightening process, the two flanges or parts gradually approach each other, and the butterfly-shaped metal ring 4 is deformed under the action of the extrusion force, thereby forming a pre-tightening force on the end faces of the two flanges or parts. The force generated by the deformation makes the upper gasket 1 and the lower gasket 2 fit more closely on the connecting surface of the flange or part, thereby improving the sealing effect, and after the two flanges or parts are connected and used, the pre-tightening force on the end faces of the flanges or parts is continuously maintained to ensure that the sealing effect is continuous and stable.

[0040] During the deformation process of the metal ring sheet 4, the inner edge of the metal ring sheet 4 applies a force in the direction close to the upper pad 1, and the outer edge of the metal ring sheet 4 applies a force in the direction close to the lower pad 2. The upper pad 1 and the lower pad 2 are deformed under the extrusion pressure of the metal ring sheet 4 and the two flanges or parts. The recessed portion 111 and the recessed portion 211 provide deformation space for the upper pad 1 and the lower pad 2, and after deformation, the recessed portion 111 and the recessed portion 211 are partially or completely attached to the connecting surface of the flange or the part, forming a structure similar to a suction cup, thereby further improving the sealing between the upper pad 1 and the lower pad 2 and the two connecting surfaces.

[0041] A processing method is applicable to a sealing gasket as mentioned above, such as Figure 8 As shown, the specific steps include:

[0042] S1. Take a piece of circular metal sheet;

[0043] S2. Punch the metal sheet into a butterfly-shaped structure with a cone angle of 160 degrees and a thickness of 2 mm by repeatedly punching with a punching machine;

[0044] S3, surface deburring and polishing;

[0045] S4, surface galvanizing, that is, completing the processing of the metal ring piece 4;

[0046] S5, metal ring piece 4 is treated with glue;

[0047] S6, take the injection-molded upper pad 1 and lower pad 2 and bond them to the two sides of the metal ring sheet 4 respectively.

[0048] like Figure 6 As shown, a production equipment is used to process the above-mentioned sealing gasket, including a processing device 5 and a conveying device 1 6 for conveying an upper pad 1, a conveying device 2 7 for conveying a metal ring sheet 4 after dipping in glue, and a conveying device 3 8 for conveying a lower pad 2. The processing device 5 is movably installed on a track, and the conveying devices 1 6, 2 7 and 3 8 are arranged sequentially along the track. When the processing device 5 moves to the corresponding stations of the conveying devices 1 6, 2 7 and 3 8 in sequence along the track, the conveying devices 1 6, 2 7 and 3 8 respectively move the upper pad 1, the metal ring sheet 4 and the lower pad 2 to the processing device 5 and assemble them at one time to form a sealing gasket.

[0049] Specifically, the processing device 5 is provided with a core column 52, and the outer diameter of the core column 52 is adapted to the inner diameter of the sealing gasket. At least two positioning columns 51 are arranged around the core column 52 in the circumferential direction, and the position of the positioning column 51 corresponds to the position of the clearance hole 3 on the sealing gasket body. The size of the core column 52 protruding from the processing device 5 is larger than the size of the positioning column 51 protruding from the processing device 5. When the upper pad 1, the metal ring sheet 4 or the lower pad 2 is assembled on the processing device 5, the core column 52 and the positioning column 51 are respectively supported in the inner hole and the clearance hole 3 of the upper pad 1, the metal ring sheet 4 or the lower pad 2, and play a positioning and supporting role. The processing device 5 is also provided with a pushing assembly, which includes a push plate 53 and a driving cylinder 54 for pushing the push plate 53 to move along the axis direction of the core column 52. The driving cylinder 54 is fixedly installed on the processing device 5, and the telescopic end of the driving cylinder 54 is fixedly connected to the push plate 53. The push plate 53 is located between the core column 52 and the positioning column 51. When the driving cylinder 54 drives the push plate 53 to move along the axial direction of the stem column 52, it is used to push the sealing gasket to move along the stem column 52 and the positioning column 1 51 until it is completely separated from the stem column 52.

[0050] The conveying device 1 6, the conveying device 2 7 and the conveying device 3 8 are respectively provided with a support rod 1 62, a support rod 2 72 and a support rod 3 82, which correspond to the clearance holes 3 on the upper pad 1, the metal ring sheet 4 and the lower pad 2, respectively. The upper pad 1, the metal ring sheet 4 and the lower pad 2 are respectively slidably mounted on the support rod 1 62, the support rod 2 72 and the support rod 3 82. The conveying device 1 6, the conveying device 2 7 and the conveying device 3 8 are also respectively provided with a moving assembly 1 61, a moving assembly 2 71 and a moving assembly 3 81 with the same structure, which are used to push the upper pad 1, the metal ring sheet 4 and the lower pad 2 along the axis of the support rod 1 62, the support rod 2 72 and the support rod 3 82 until the upper pad 1, the metal ring sheet 4 and the lower pad 2 are moved to the core column 52 of the processing device 5. In this embodiment, the structures of the moving assembly 1 61, the moving assembly 2 71 and the moving assembly 3 81 mainly include a front shift plate that can move along the axial direction of the support rod 1 62, the support rod 2 72 and the support rod 3 82, and a driving member used to drive the front shift plate to move, and one end of the front shift plate is fixedly connected to the output end of the driving member. When in use, the driving member drives the front shift plate to move, thereby pushing the corresponding upper pad 1, metal ring sheet 4 or lower pad 2 away from the support rod 1 62, the support rod 2 72 or the support rod 3 82, thereby pushing it onto the core column 52. In this embodiment, the driving member is a cylinder. In addition, the upper pad 1, the metal ring sheet 4 and the lower pad 2 can be placed on the support rod 1 62, the support rod 2 72 and the support rod 3 82 by manual loading or by robot loading, which is not limited here.

[0051] The production equipment also includes a transfer device 9, referring to Figure 7 The transfer device 9 includes a device body and a receiving plate 91 rotatably mounted on the device body, and the rotation angle of the receiving plate 91 is 90 degrees. Specifically, a rotating rod is provided at the bottom of the receiving plate 91, one end of the rotating rod is fixedly connected to the receiving plate 91, and the other end is fixedly connected to the output end of the driving motor, and the rotating rod is rotatably mounted on the device body through a bearing. When the driving motor is started, the receiving plate 91 can be driven to rotate by the rotating rod. The rotatable mounting method of the receiving plate 91 can also adopt other technical structures in the prior art, which is not limited here.

[0052] The receiving plate 91 is provided with a second positioning column 92 for limiting the position of the sealing gasket. Specifically, in this embodiment, the receiving plate 91 is an L-shaped structure, and the bottom of the L-shaped structure is used to support the bottom of the sealing gasket body. The second positioning column 92 corresponds to the position of the clearance hole 3 and is used to limit the position of the sealing gasket body. The transfer device 9 is also provided with a lifting plate 93 that can be lifted up and down. The lifting plate 93 is driven by a lifting cylinder. The receiving plate 91 is provided with a matching groove 911 corresponding to the position of the lifting plate 93. When the receiving plate 91 is rotated until the sealing gasket body is placed horizontally, the position of the lifting plate 93 corresponds to the matching groove 911. When the processing device 5 moves along the track to the workstation corresponding to the transfer device 9, the assembled sealing gasket body is moved to the containing plate 91 by pushing the component, and is limited by the positioning column 92, and then the containing plate 91 is rotated until the sealing gasket body is in a horizontal state. At this time, the lifting plate 93 located below the matching groove 911 rises and passes through the matching groove 911 to eject the sealing gasket body. After the sealing gasket body is separated from the positioning column 92, it can be moved by a mechanical gripper or other structures in the prior art and transferred to the next workstation for processing, which will not be elaborated here.

[0053] During the specific assembly operation of the sealing gasket body, the upper pad 1, the metal ring piece 4 and the lower pad 2 are first installed on the support rod 1 62, the support rod 2 72 and the support rod 3 82 on the conveying device 1 6, the conveying device 2 7 and the conveying device 3 8 respectively, and then the processing device 5 is started and moves along the track to the corresponding station of the conveying device 1 6, and then the conveying device 1 6 is started, and the moving component 1 61 moves the upper pad 1 on the support rod 1 62 to the core column 52 of the processing device 5, and then the moving component 1 61 is reset; the processing device 5 continues to move along the track to the corresponding station of the conveying device 2 7, and then the conveying device 2 7 is started, and the moving component 2 71 moves the metal ring piece 4 on the support rod 2 72 to the core column 52 of the processing device 5, and the metal ring piece 4 is assembled with the upper pad 1, and then the moving component 2 71 is reset; the processing device 5 Continue to move along the track to the workstation corresponding to the conveying device three 8, then the conveying device three 8 is started, and the moving component three 81 moves the lower pad 2 on the support rod three 82 and pushes it onto the core column 52 of the processing device 5, and the lower pad 2 is assembled together with the metal ring sheet 4 and the upper pad 1 to form a sealing gasket body, and then the moving component three 81 is reset; the processing device 5 continues to move along the track to the workstation corresponding to the transfer device 9, and then the pushing component on the processing device 5 is started, and the pushing plate 53 pushes the sealing gasket body to move along the core column 52 until it is separated from the core column 52 and moved to the receiving plate 91. At this time, the clearance hole 3 of the sealing gasket body is correspondingly mounted on the positioning column two 92 to prevent the sealing gasket body from shifting; then the receiving plate 91 is rotated until the sealing gasket body is in a horizontal state, and then the sealing gasket body is ejected to facilitate the mechanical hand to grab the sealing gasket body.

[0054] In this embodiment, the metal ring piece 4 assembled with the upper pad 1 and the lower pad 2 is a metal ring piece 4 that has been dipped in glue. The specific dipping operation can be completed before being installed on the conveying device 2 7, or it can be completed in the conveying device 2 7. If it is completed in the conveying device 2 7, the conveying device 2 7 needs to be provided with a dipping device to synchronously transfer the metal ring piece 4 after dipping in glue to the support rod 2 72 outside the conveying device 2 7. The dipping device adopts the structure in the prior art.

[0055] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the protection scope of the claims of the present invention.

Claims

1. A sealing gasket, Features: The invention relates to a sealing gasket body having an annular structure, wherein the sealing gasket body is provided with a plurality of circumferentially spaced piercing holes (3), wherein the sealing gasket body comprises an upper gasket (1), a metal ring sheet (4) and a lower gasket (2) which are fixedly connected in sequence, wherein the metal ring sheet (4) is a stamped butterfly-shaped structure, and when the sealing gasket body is connected between two flange end faces, the preload force between the sealing gasket body and the flange is increased by deformation of the metal ring sheet (4), and the outer side surface one (11) of the upper gasket (1) and the outer side surface two (21) of the lower gasket (2) are both working surfaces in contact with the flange or parts, and the outer side surface one (11) is provided with an annular recessed portion one (111), and the outer side surface two (21) is provided with an annular recessed portion The recessed portion 1 (111) and the recessed portion 2 (211) are respectively located on a side away from the metal ring sheet (4); the recessed portion 1 (111) is located at the inner edge of the upper pad (1); the cross section of the recessed portion 1 (111) is a triangular or arc-shaped structure; the recessed portion 2 (211) is located at the outer edge of the lower pad (2); the cross section of the recessed portion 2 (211) is an arc-shaped structure; the maximum depth of the recessed portion 1 (111) and the recessed portion 2 (211) is within a range of 1 / 5 to 1 / 4 of the height of the metal ring sheet (4); a flange (12) is provided at the outer edge of the upper pad (1); the flange (12) is covered on the outer side of the outer edge surface (41) of the metal ring sheet (4); and the flange (12) is engaged and snap-fitted with the lower pad (2).

2. A sealing gasket according to claim 1, Features: The cone angle of the metal ring piece (4) is 140-170 degrees.

3. A sealing gasket according to claim 1, Features: The upper pad (1) and the lower pad (2) are both made of a silica gel material containing quartz powder and polyethylene powder.

4. A sealing gasket according to claim 1, Features: The clearance hole (3) is a waist-shaped hole.

5. A sealing gasket according to claim 2, Features: The metal ring sheet (4) is made of a martensitic stainless steel plate or an aluminum alloy plate.

6. A method for processing a sealing gasket, applicable to a sealing gasket according to any one of claims 1 to 5, comprising the following steps: S1. Take a piece of circular metal sheet; S2, punching into a butterfly-shaped structure by a punching machine; S3, deburring and surface polishing of the dish-shaped structure; S4, surface galvanizing, i.e. completing the processing of the metal ring (4); S5, metal ring (4) is dipped in glue; S6. Take the injection-molded upper pad (1) and lower pad (2) and bond them to the two sides of the metal ring sheet (4) respectively.

7. A production equipment suitable for a sealing gasket according to any one of claims 1 to 5, Features: The invention comprises a processing device (5) and a conveying device 1 (6) for conveying an upper pad (1), a conveying device 2 (7) for conveying a metal ring sheet (4) after a resin dipping treatment, and a conveying device 3 (8) for conveying a lower pad (2). The processing device (5) is movably mounted on a track. The conveying device 1 (6), the conveying device 2 (7) and the conveying device 3 (8) are arranged in sequence along the track. When the processing device (5) moves in sequence along the track to corresponding workstations of the conveying device 1 (6), the conveying device 2 (7) and the conveying device 3 (8), the conveying device 1 (6), the conveying device 2 (7) and the conveying device 3 (8) respectively move the upper pad (1), the metal ring sheet (4) and the lower pad (2) onto the processing device (5) and assemble and mold them at one time to form a sealing gasket.

8. A production device according to claim 7, Features: The transfer device (9) further comprises a transfer device (9), wherein the transfer device (9) comprises a rotatably mounted receiving plate (91), wherein the receiving plate (91) is provided with a second positioning column (92) for limiting the position of the sealing gasket. When the processing device (5) moves along the track to a corresponding workstation of the transfer device (9), the assembled sealing gasket is moved to the receiving plate (91) by a pushing component and is limited by the second positioning column (92). A matching groove (911) is provided at a position corresponding to the sealing gasket on the receiving plate (91), and when the receiving plate (91) is rotated to a horizontal state, a lifting plate (93) located below the matching groove (911) rises and passes through the matching groove (911) to eject the sealing gasket.

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