Membrane electrode frame glue injection process

Abstract

The application relates to a membrane electrode frame glue injection process, which comprises the following steps: step one, glue is respectively injected on two surfaces of a membrane electrode; and step two, gas diffusion layers are respectively attached to the two surfaces of the membrane electrode after the glue injection, so as to form a semi-finished product; the application relates to the technical field of membrane electrode frame glue injection. The membrane electrode frame glue injection process can combine punching and glue injection together through the structure of a glue injection mold, can quickly punch through holes on the two sides of the semi-finished product and then perform glue injection forming, and can make the upper and lower frames more closely connected, so that the glue lines on the two sides of the membrane electrode frame can be connected and fixed through the communication holes, effectively solves the problem that the glue lines on the two sides of the membrane electrode are dislocated in the battery stack assembly process, and guarantees the sealing performance of the finished battery stack.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of frame glue injection of a membrane electrode, in particular to a frame glue injection process of a membrane electrode. BACKGROUND

[0002] The existing frame glue injection process of a membrane electrode is as follows: a cutting machine cuts a liquid silicone rubber roll into a required shape, a robot takes a piece of the cut liquid silicone rubber and places the piece on a bottom layer of a jig, takes a 3CCM membrane electrode and places the 3CCM membrane electrode in the middle, places the reverse side of the cut liquid silicone rubber on the uppermost layer, covers the jig, flows to the next station, melts the liquid silicone rubber to form a frame by heating the jig, flows to the next station to cool and form a 5CCM membrane electrode with a frame, and then pastes GDL (gas diffusion layer) on two sides of the 5CCM membrane electrode respectively to form a 7CCM membrane electrode with a frame. The 7CCM membrane electrode with a frame is sealed by a seal strip, the seal strip is formed by dispensing glue on the electrode plate, dispensing glue on the other side of the electrode plate after solidification, and forming a bipolar plate with a double-sided seal strip. The electrode plate with a 7CCM membrane electrode with a frame and the seal strip are subjected to pressure stacking. The above process has the following disadvantages: the steps are very complicated, the overall production steps are many, the efficiency is low, the number of required equipment is large, the number of required labor is large, and the cycle is long.

[0003] According to the frame glue injection process of a membrane electrode in the patent No. CN116238093A, the process is directly formed in use, and the following problems exist:

[0004] (1) The upper and lower frames are formed separately, and no tight connection is formed between the upper and lower frames, so that the upper and lower frames are prone to falling off in the later period and have poor wrapping effect.

[0005] (2) A large number of bubbles exist in the frame after the later forming, and the bubbles cannot be effectively discharged, which affects the quality of the finished product. SUMMARY

[0006] In view of the deficiencies of the prior art, the application provides a frame glue injection process of a membrane electrode, which solves the above problems.

[0007] To achieve the above purpose, the application is implemented by the following technical scheme: a frame glue injection process of a membrane electrode, comprising the following steps:

[0008] Step one, dispensing glue on two sides of the membrane electrode respectively;

[0009] Step two, pasting a gas diffusion layer on two sides of the membrane electrode after the glue dispensing to form a semi-finished product;

[0010] Step three, placing the semi-finished product in a glue injection mold, placing the semi-finished product in a lower cavity in a lower mold, then pressing down an upper mold, and combining an upper cavity and the lower cavity to form a forming cavity;

[0011] Step four, the semi-finished product is punched by the glue injection mold, the driving cylinder drives the punch rod to move downward, drives the punch rod to move downward in turn through the upper connecting groove, the upper cavity, the lower connecting groove and the lower cavity, and punches the semi-finished product frame, and the debris in the frame is punched into the lower connecting groove, when the punch rod descends, the upper pressing frame moves downward and abuts against the receiving rod in advance, the extrusion top plate moves downward, the top plate extrudes the reset spring to move downward, drives the lower top rod to move below the lower connecting groove, then the semi-finished product can be punched and the debris is punched into the lower groove for centralized treatment, then the driving cylinder drives the punch rod to reset, at this time the upper pressing frame moves upward and loses the abutment of the receiving rod, then the reset spring drives the lower top rod to reset and drives the lower top rod to be inserted into the lower connecting groove for continuous sealing;

[0012] Step five, liquid silicone is injected into the glue injection mold to inject glue into the semi-finished product, and the semi-finished product is injected with glue through the runner, and a frame is formed;

[0013] Step six, bubble removal operation is performed on the semi-finished product in the glue injection mold, the vibration motor is started to drive the metal film to vibrate through the conduction frame, the semi-finished product is vibrated, the liquid silicone in the upper cavity and the lower cavity is vibrated, the internal bubbles are effectively discharged, and the metal film can be kept horizontal through the limiting of the supporting net and the steel wire;

[0014] Step seven, solidification molding, and then the finished product is output.

[0015] As a further scheme of the application, in step four, the driving cylinder drives the punch rod to move downward, drives the punch rod to move downward in turn through the upper connecting groove, the upper cavity, the lower connecting groove and the lower cavity, and punches the semi-finished product frame, and the debris in the frame is punched into the lower connecting groove.

[0016] As a further scheme of the application, in step four, the debris is blown into the groove through the blowing pot for centralized treatment.

[0017] As a further scheme of the application, in step four, the driving cylinder drives the punch rod to reset, at this time the upper pressing frame moves upward and loses the abutment of the receiving rod, then the reset spring drives the lower top rod to reset and drives the lower top rod to be inserted into the lower connecting groove for continuous sealing.

[0018] As a further scheme of the application, in step four, the distance between the punch rod and the lower top rod is greater than the distance between the upper pressing frame and the receiving rod, and the distance is the depth of the lower connecting groove.

[0019] As a further scheme of the application, in step six, the vibration motor is started to drive the metal film to vibrate through the conduction frame, the semi-finished product is vibrated, the liquid silicone in the upper cavity and the lower cavity is vibrated, and the internal bubbles are discharged.

[0020] As a further aspect of the application: in step six, the top of the metal film is flush with the lower cavity, and the bottom of the metal film is connected to the bottom of the inner groove cavity through the steel wire penetrating the support net.

[0021] The injection mold includes an upper mold and a lower mold, an inner cavity of the upper mold is provided with an upper cavity matched with the semi-finished product, an inner cavity of the lower mold is provided with a lower cavity matched with the semi-finished product, the inner cavity of the upper mold is fixedly connected with a driving cylinder, one end of a piston rod of the driving cylinder is fixedly connected with a punch rod, the inner cavity of the upper mold is provided with an upper connecting groove in sliding sealing with the punch rod, the bottom of the upper connecting groove is communicated with the inner cavity of the upper cavity and is flush with the upper cavity, the inner cavity of the lower mold is fixedly connected with a reset spring through a cavity, the top end of the reset spring is fixedly connected with a top plate, the top plate is fixedly connected with a lower top rod, the inner cavity of the lower mold is provided with a lower connecting groove in sliding sealing with the surface of the lower top rod, the top of the lower connecting groove is communicated with the inner cavity of the lower cavity and is flush with the lower cavity, the inner cavity of the cavity is fixedly connected with a blowing pot communicated with an external fan and having an air outlet facing the lower connecting groove, the diameter of the punch rod is the same as that of the lower top rod, the inner diameter of the upper connecting groove is the same as that of the lower connecting groove, the punch rod, the lower top rod, the upper connecting groove and the lower connecting groove are coaxial, one side of the punch rod is fixedly connected with an upper pressing frame penetrating and extending to the outside of the upper mold, one side of the lower top rod is fixedly connected with a receiving rod penetrating and extending to the outside of the lower mold, when the punch rod and the lower top rod are in the initial state, the distance between the punch rod and the lower top rod is greater than the distance between the upper pressing frame and the receiving rod, and the distance is the depth of the lower connecting groove, in use, the film electrode after glue dispensing is pasted with gas diffusion layers on both sides to form a semi-finished product, then the semi-finished product is placed in the lower cavity in the lower mold, then the upper mold is pressed down, the upper cavity and the lower cavity are combined to form a cavity, at this time, the punch rod is driven to move downward by the driving cylinder, the punch rod is sequentially penetrated through the upper connecting groove, the upper cavity, the lower connecting groove and the lower cavity, the semi-finished product frame is punched, and the internal debris is punched into the lower connecting groove, when the punch rod descends, the upper pressing frame moves, and the upper pressing frame is in advance abutted with the receiving rod downward, the top plate is pressed downward, the reset spring is pressed downward, the lower top rod is driven to move below the lower connecting groove, then the semi-finished product can be punched and the debris is punched into the lower cavity, at this time, the debris is blown into the cavity for centralized treatment through the blowing pot, then the punch rod is reset by the driving cylinder, at this time, the upper pressing frame moves upward and loses the abutment with the receiving rod, then the reset spring drives the lower top rod to reset, the lower top rod is inserted into the lower connecting groove for continuous sealing, then the semi-finished product is injected with glue through the runner to form a frame, the inner cavity of the lower mold is provided with an inner groove flush with the lower cavity at the top, the inner groove is arranged at the center of the lower cavity, the inner cavity of the inner groove is fixedly connected with a metal film flush with the lower cavity at the top, the inner cavity of the inner groove is fixedly connected with a support net below the metal film and abutted with the metal film, the bottom of the metal film is connected with the bottom of the inner cavity of the inner groove through a steel wire penetrating the support net, the inner cavity of the inner groove is fixedly connected with a vibration motor, the vibration end of the vibration motor is fixedly connected with a conduction frame, the top of the conduction frame penetrates the support net and is abutted with the bottom of the metal film, when the punching is completed, the glue flows to the lower part through the punched hole during the glue injection, the upper and lower frames are more tightly connected,The glue lines on both sides of the membrane electrode frame can be connected and fixed through the communication holes, the problem of mispositioning of the glue lines on both sides of the membrane electrode in the battery stack assembly process is effectively solved, the sealing performance of the finished battery stack is ensured, at this time, the vibration motor is started to drive the metal film vibration through the transmission frame, the semi-finished product is vibrated, the liquid silicone in the upper cavity and the lower cavity is vibrated, the internal bubbles are effectively discharged, the metal film can be kept horizontal through the limiting of the supporting net and the steel wire, the bubbles in the liquid silicone can be effectively discharged from the air hole without affecting the injection molding process, and the quality of the molded frame glue line is better.

[0022] Compared with the prior art, the present application has the following advantages:

[0023] 1、The present application combines punching and glue injection together through the glue injection mold structure, the through holes can be punched on both sides of the semi-finished product, then glue injection molding is carried out, the upper and lower frame connections are more compact, the glue lines on both sides of the membrane electrode frame can be connected and fixed through the communication holes, the problem of mispositioning of the glue lines on both sides of the membrane electrode in the battery stack assembly process is effectively solved, and the sealing performance of the finished battery stack is ensured.

[0024] 2、The present application drives the metal film vibration through the transmission frame of the vibration motor, drives the semi-finished product vibration, makes the liquid silicone in the upper cavity and the lower cavity vibrate, effectively discharges the internal bubbles, and makes the metal film keep horizontal through the limiting of the supporting net and the steel wire, effectively discharges the bubbles in the liquid silicone from the air hole without affecting the injection molding process, and the quality of the molded frame glue line is better. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structure schematic view of the glue injection mold of the present application;

[0026] Figure 2 It is a structure sectional view of the glue injection mold of the present application;

[0027] Figure 3 It is a structure sectional view of the glue injection mold of the present application; Figure 2 It is a local enlarged view of A in the present application;

[0028] Figure 4 It is a local enlarged view of B in the present application; Figure 2 It is a local enlarged view of B in the present application;

[0029] Figure 5 It is a local enlarged view of C in the present application; Figure 1 It is a local enlarged view of C in the present application;

[0030] Figure 6 It is a structure top view of the supporting net of the present application.

[0031] In the figure: 1, upper die; 2, lower die; 3, upper cavity; 4, lower cavity; 5, semi-finished product; 6, inner groove; 7, metal film; 8, support net; 9, steel wire; 10, vibration motor; 11, transmission frame; 12, driving cylinder; 13, upper connecting groove; 14, punch rod; 15, upper pressing frame; 16, return spring; 17, top plate; 18, lower top rod; 19, lower connecting groove; 20, receiving rod; 21, blowing hopper.

[0032] DETAILED DESCRIPTION

[0033] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined object of the application, the specific embodiments, structures, features and effects according to the present application are described in detail below in combination with the drawings and preferred embodiments.

[0034] Please refer to Figures 1-6 The present application provides a technical solution: a membrane electrode frame glue injection process, comprising the following steps:

[0035] Step one, point glue on both sides of the membrane electrode respectively;

[0036] Step two, paste the gas diffusion layer on both sides of the glued membrane electrode respectively to form a semi-finished product 5;

[0037] Step three, place the semi-finished product 5 into the glue injection mold, place the semi-finished product 5 into the lower cavity 4 in the lower die 2, then press down the upper die 1, the upper cavity 3 and the lower cavity 4 combine to form a cavity;

[0038] Step four, punch the semi-finished product 5 through the glue injection mold, drive the punch rod 14 to move downward by the driving cylinder 12, drive the punch rod 14 to move downward in turn through the upper connecting groove 13, the upper cavity 3, the lower connecting groove 19 and the lower cavity 4, punch the frame of the semi-finished product 5, and flush the debris inside into the lower connecting groove 19, when the punch rod 14 is descending, the upper pressing frame 15 moves, and the receiving rod 20 is in advance abutted downward, the top plate 17 is extruded downward, the return spring 16 is extruded downward, the lower top rod 18 is driven to move below the lower connecting groove 19, then the semi-finished product 5 can be punched and the debris is flushed into the lower cavity for centralized treatment, then the driving cylinder 12 drives the punch rod 14 to reset, the upper pressing frame 15 moves upward and loses the abutment with the receiving rod 20, then the return spring 16 drives the lower top rod 18 to reset, and the lower top rod 18 is inserted into the lower connecting groove 19 for continuous sealing;

[0039] Step five, inject liquid silicone into the glue injection mold to glue the semi-finished product 5, and glue the semi-finished product 5 through the runner to form a frame;

[0040] Step six, bubble removal operation is carried out on the semi-finished product 5 in the glue injection mold, the vibration motor 10 is started to drive the metal film 7 to vibrate through the transmission frame 11, the semi-finished product 5 is vibrated, the liquid silicone in the upper cavity 3 and the lower cavity 4 is vibrated, the internal bubbles are effectively removed, and the metal film 7 can be kept horizontal through the limiting of the supporting net 8 and the steel wire 9.

[0041] Step seven, curing and forming, then output the finished product.

[0042] In step four, when punching, the driving cylinder 12 drives the punch rod 14 to move downward, the punch rod 14 moves downward in turn through the upper connecting groove 13, the upper cavity 3, the lower connecting groove 19 and the lower cavity 4, and the frame of the semi-finished product 5 is punched, and the internal debris is punched into the lower connecting groove 19.

[0043] In step four, when punching, the debris is blown into the empty groove through the blowing hopper 21 for centralized treatment.

[0044] In step four, when punching, the driving cylinder 12 drives the punch rod 14 to reset, at this time the upper pressing frame 15 moves upward and loses the abutment to the receiving rod 20, then the reset spring 16 drives the lower ejector rod 18 to reset, and the lower ejector rod 18 is inserted into the lower connecting groove 19 to continue sealing.

[0045] In step four, when punching, the distance between the punch rod 14 and the lower ejector rod 18 is greater than the distance between the upper pressing frame 15 and the receiving rod 20, and the distance is the depth of the lower connecting groove 19.

[0046] In step six, when glue injection is carried out, the vibration motor 10 is started to drive the metal film 7 to vibrate through the transmission frame 11, the semi-finished product 5 is vibrated, and the liquid silicone in the upper cavity 3 and the lower cavity 4 is vibrated to remove the internal bubbles.

[0047] In step six, the top of the metal film 7 is flush with the lower cavity 4, and the bottom of the metal film 7 is connected with the bottom of the inner recess 6 through the steel wire 9 penetrating the supporting net 8.

[0048] The glue injection mold comprises an upper mold 1 and a lower mold 2, the inner cavity of the upper mold 1 is provided with an upper cavity 3 matched with the semi-finished product 5, the inner cavity of the lower mold 2 is provided with a lower cavity 4 matched with the semi-finished product 5, the inner cavity of the upper mold 1 is fixedly connected with a driving cylinder 12, one end of the piston rod of the driving cylinder 12 is fixedly connected with a punch rod 14, the inner cavity of the upper mold 1 is provided with an upper connecting groove 13 in sliding sealing with the punch rod 14, the bottom of the upper connecting groove 13 is communicated with the inner cavity of the upper cavity 3 and is flush with the inner cavity, the inner cavity of the lower mold 2 is fixedly connected with a reset spring 16 through a cavity, the top end of the reset spring 16 is fixedly connected with a top plate 17, the top plate 17 is fixedly connected with a lower top rod 18, the inner cavity of the lower mold 2 is provided with a lower connecting groove 19 in sliding sealing with the surface of the lower top rod 18, the top of the lower connecting groove 19 is communicated with the inner cavity of the lower cavity 4 and is flush with the inner cavity, the inner cavity of the cavity is fixedly connected with a blowing nozzle 21 communicated with an external fan and having an air outlet facing the lower connecting groove 19, the punch rod 14 and the lower top rod 18 have the same diameter, the inner diameters of the upper connecting groove 13 and the lower connecting groove 19 are the same, the punch rod 14, the lower top rod 18, the upper connecting groove 13 and the lower connecting groove 19 are coaxial, one side of the punch rod 14 is fixedly connected with an upper pressing frame 15 penetrating and extending to the outside of the upper mold 1, one side of the lower top rod 18 is fixedly connected with a receiving rod 20 penetrating and extending to the outside of the lower mold 2, when the punch rod 14 and the lower top rod 18 are in an initial state, the distance between the punch rod 14 and the lower top rod 18 is greater than the distance between the upper pressing frame 15 and the receiving rod 20, and the distance is the depth of the lower connecting groove 19, in use, the film electrode after glue dispensing is pasted with gas diffusion layers on both sides to form the semi-finished product 5, then the semi-finished product 5 is placed in the lower cavity 4 in the lower mold 2, then the upper mold 1 is pressed down, the upper cavity 3 and the lower cavity 4 are combined to form a cavity, at this time, the punch rod 14 is driven to move downward by the driving cylinder 12, the punch rod 14 is sequentially penetrated through the upper connecting groove 13, the upper cavity 3, the lower connecting groove 19 and the lower cavity 4, the frame of the semi-finished product 5 is punched, and the debris inside is punched into the lower connecting groove 19, when the punch rod 14 descends, the upper pressing frame 15 moves, and the upper pressing frame 15 is in advance abutted with the receiving rod 20 downward, the top plate 17 is pressed to move downward, the reset spring 16 is pressed to move downward by the top plate 17, the lower top rod 18 is driven to move below the lower connecting groove 19, then the semi-finished product 5 can be punched and the debris is punched into the cavity below, at this time, the debris is blown into the cavity by the blowing nozzle 21 for centralized treatment, then the punch rod 14 is reset by the driving cylinder 12, at this time, the upper pressing frame 15 moves upward and loses the abutment with the receiving rod 20, then the lower top rod 18 is reset by the reset spring 16, the lower top rod 18 is inserted into the lower connecting groove 19 for continuous sealing, then the semi-finished product 5 is injected with glue through a runner to form a frame, the inner cavity of the lower mold 2 is provided with an inner groove 6 flush with the lower cavity 4 at the top, the inner groove 6 is arranged at the center of the lower cavity 4, the inner cavity of the inner groove 6 is fixedly connected with a metal film 7 flush with the lower cavity 4 at the top, the inner cavity of the inner groove 6 is fixedly connected with a supporting net 8 below the metal film 7 and abutting against the metal film 7,The bottom of the metal film 7 is connected with the bottom of the inner cavity of the inner groove 6 through the steel wire 9 penetrating the support net 8, the inner cavity of the inner groove 6 is fixedly connected with the vibration motor 10, the vibration end of the vibration motor 10 is fixedly connected with the transmission frame 11, the top of the transmission frame 11 penetrates the support net 8 and abuts against the bottom of the metal film 7, when the glue is injected after the punching is completed, the glue flows to the lower part through the punched hole, the upper and lower frames are connected more tightly, the glue lines on both sides of the membrane electrode frame can be connected and fixed through the communication hole, the problem that the glue lines on both sides of the membrane electrode are dislocated in the battery stack assembly process is effectively solved, the sealing property of the finished battery stack is ensured, at this time, the vibration motor 10 is started to drive the metal film 7 to vibrate through the transmission frame 11, the semi-finished product 5 is driven to vibrate, the liquid silicone in the upper cavity 3 and the lower cavity 4 is vibrated, the internal air bubbles are effectively discharged, the metal film 7 can be kept horizontal through the limiting of the support net 8 and the steel wire 9, the air bubbles in the liquid silicone can be effectively discharged from the air hole without affecting the injection molding process, the quality of the formed frame glue line is better.

[0049] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as the above preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, as long as the changes or modifications do not deviate from the technical solution of the present application. Any modification, change and modification of the above embodiments according to the technical essence of the present application are still within the scope of the technical solution of the present application.

Claims

1. A membrane electrode border glue injection process, characterized in that: The method comprises the following steps: Step one, point the two sides of the membrane electrode respectively; Step two, paste the two sides of the membrane electrode after point to the gas diffusion layer to form a semi-finished product (5); Step three, put the semi-finished product (5) into the injection mold, put the semi-finished product (5) into the lower cavity (4) in the lower mold (2), then press down the upper mold (1), the upper cavity (3) and the lower cavity (4) are combined to form a cavity; Step four, punch the semi-finished product (5) through the injection mold; Step five, inject liquid silicone into the injection mold to inject glue into the semi-finished product (5), and inject glue into the semi-finished product (5) through the sprue to form a frame; Step six, defoam the semi-finished product (5) in the injection mold; Step seven, solidification molding, then output the finished product; When punching in step four, the driving air cylinder (12) drives the punch rod (14) to move downward, driving the punch rod (14) to move downward in turn through the upper connecting groove (13), the upper cavity (3), the lower connecting groove (19) and the lower cavity (4), punching the frame of the semi-finished product (5) and punching the debris inside into the lower connecting groove (19); When punching in step four, the driving air cylinder (12) drives the punch rod (14) to reset, at this time the upper pressing frame (15) moves upward and loses the abutment to the receiving rod (20), then the reset spring (16) drives the lower ejector rod (18) to reset, driving the lower ejector rod (18) to insert into the lower connecting groove (19) to continue sealing; When injecting in step six, start the vibration motor (10) to drive the metal film (7) to vibrate through the transmission frame (11), drive the semi-finished product (5) to vibrate, make the liquid silicone in the upper cavity (3) and the lower cavity (4) vibrate, and the bubbles inside are discharged; The injection mold comprises an upper mold (1) and a lower mold (2), the inner cavity of the upper mold (1) is provided with an upper cavity (3) matched with the semi-finished product (5), the inner cavity of the lower mold (2) is provided with a lower cavity (4) matched with the semi-finished product (5), the inner cavity of the upper mold (1) is fixedly connected with a driving air cylinder (12), one end of the piston rod of the driving air cylinder (12) is fixedly connected with a punch rod (14), the inner cavity of the upper mold (1) is provided with an upper connecting groove (13) slidingly sealed with the punch rod (14), the bottom of the upper connecting groove (13) is communicated with and flush with the inner cavity of the upper cavity (3), the inner cavity of the lower mold (2) is fixedly connected with a reset spring (16) through a cavity, the top end of the reset spring (16) is fixedly connected with a top plate (17), the top plate (17) is fixedly connected with a lower ejector rod (18), the inner cavity of the lower mold (2) is provided with a lower connecting groove (19) slidingly sealed with the surface of the lower ejector rod (18), the top of the lower connecting groove (19) is communicated with and flush with the inner cavity of the lower cavity (4); The inner cavity of the lower mold (2) is provided with an inner groove (6) flush with the lower cavity (4) at the top, the inner groove (6) is arranged at the center of the lower cavity (4), and the inner cavity of the inner groove (6) is fixedly connected with a metal film (7) flush with the lower cavity (4) at the top; One side of the punch rod (14) is fixedly connected with an upper pressing frame (15) penetrating and extending to the outside of the upper die (1), and one side of the lower ejector rod (18) is fixedly connected with a receiving rod (20) penetrating and extending to the outside of the lower die (2); When the punch rod (14) descends, the upper pressing frame (15) moves and is in advance abutted downward with the receiving rod (20), the top plate (17) is extruded to move downward, the top plate (17) extrudes the return spring (16) to move downward, and the lower ejector rod (18) is driven to move below the lower connecting groove (19), then the semi-finished product (5) can be punched and the scraps are punched into the lower air slot.

2. The process for membrane electrode edge frame glue injection according to claim 1, characterized in that: When punching in step four, the scraps are blown into the air slot through the blowing hopper (21) for centralized treatment.

3. The process for membrane electrode edge gluing according to claim 1, characterized in that: When punching in step four, the distance between the punch rod (14) and the lower ejector rod (18) is greater than the distance between the upper pressing frame (15) and the receiving rod (20), and the distance is the depth of the lower connecting groove (19).

4. The process for membrane electrode edge gluing according to claim 1, characterized in that: The inner cavity of the inner groove (6) is fixedly connected with a supporting net (8) located below the metal film (7) and abutting against the metal film (7), and the bottom of the metal film (7) is connected with the bottom of the inner cavity of the inner groove (6) through a steel wire (9) penetrating the supporting net (8). When punching in step four, the scraps are blown into the air slot through the blowing hopper (21) for centralized treatment. When punching in step four, the distance between the punch rod (14) and the lower ejector rod (18) is greater than the distance between the upper pressing frame (15) and the receiving rod (20), and the distance is the depth of the lower connecting groove (19). The inner cavity of the inner groove (6) is fixedly connected with a supporting net (8) located below the metal film (7) and abutting against the metal film (7), and the bottom of the metal film (7) is connected with the bottom of the inner cavity of the inner groove (6) through a steel wire (9) penetrating the supporting net (8).

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