Edge sealing device for plane mask production

By introducing slide frames, sliding plates, negative pressure components and gear parts into the edge sealing device for flat mask production, the automatic adsorption and edge sealing process of the mask main body is realized, solving the problem of low edge sealing efficiency in the prior art and improving the Edge sealing stability and safety, and reduce production costs.

CN119261210AInactive Publication Date: 2025-01-07JIANGYIN XINXINDA TEXTILE CO LTD
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Patent Information

Application Number
CN202411412591.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-11
Publication Date
2025-01-07
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The existing edge sealing device for the production of flat masks requires frequent position adjustment during disassembly and assembly, resulting in low edge sealing efficiency.

Method used

A sealing device including a sliding frame, sliding plate, negative pressure assembly, edge sealing assembly and gear parts is designed. The negative pressure assembly is used to absorb the mask body, and the gear parts drive the sliding plate and edge sealing block to realize automated edge sealing. The process and automatic discharge is achieved through the scraping block.

Benefits of technology

It improves the stability and efficiency of edge sealing, ensures operational safety, reduces the harm of residual temperature after edge sealing to operators, and reduces production costs.

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Abstract

The invention discloses an edge sealing device for plane mask production, and relates to the technical field of plane mask production. The edge sealing cost is reduced, and the edge sealing efficiency is improved. Comprising a base, sliding frames are fixed to the outer wall of the top of the base, a sliding plate is movably connected between the two sliding frames, an edge sealing assembly is fixed to the outer walls of the tops of the sliding frames, air holes are formed in the surface of the sliding plate, a cover plate used in cooperation with the air holes is fixed to the bottom of the sliding plate, and a bent pipe is fixed to the bottom of the cover plate; a negative pressure assembly is installed at the end, away from the cover plate, of the bent pipe. By arranging the negative pressure assembly, the mask main body can be adsorbed, the stability of the mask main body during edge sealing is guaranteed, and meanwhile, the negative pressure assembly can be matched with the stuffing box to collect and treat particulate matter generated after edge sealing; the sliding plate is arranged to be in a sliding mode, so that a safe distance is kept between an operator and the edge sealing block in the feeding process, and the safety during edge sealing is improved.
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Description

Technical Field

[0001] The invention relates to the technical field of flat mask production, and in particular to an edge sealing device for flat mask production. Background Art

[0002] In the prior art, a flat mask can prevent some visible or invisible substances that are harmful to the human body from being filtered, thereby not causing unnecessary impact on the human body. The existing flat masks need to be edge-sealed during the production process, but when the edge-sealing device of the existing flat mask is in use, the flat mask needs to spend a long time in the fixing process, which affects the efficiency of the edge sealing.

[0003] After searching, the Chinese patent publication number 202220731802.x discloses an edge banding device for the production of flat masks, including: a processing table, an edge banding machine body is fixedly installed on the surface of the processing table, and a movable groove is opened on the surface of the processing table, the movable groove is located below the edge banding machine body, and a first threaded rod is rotatably connected inside the movable groove. A first motor is fixedly installed on one side of the processing table, and the output end of the first motor is fixedly connected to the first threaded rod, and a movable block is threadedly connected to the surface of the first threaded rod.

[0004] The edge sealing device for producing flat masks in the above-mentioned patent has the following shortcomings: although the stability of the mask during edge sealing can be ensured by setting a limit plate, the position of the adjustment block needs to be continuously moved during the process of disassembling and assembling the mask from the limit plate. Therefore, the mask disassembly and assembly process takes a long time, which affects the edge sealing efficiency of the mask. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an edge sealing device for producing flat masks.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] The cam is provided with a plurality of sliding plates, each of which is provided with a plurality of sliding plates, each of which is provided with a plurality of sliding plates, each of which is provided with a plurality of sliding plates, each of which is provided with a plurality of sliding plates.

[0008] Preferably: the edge sealing assembly includes a cylinder and an L-shaped plate, the L-shaped plate is fixed to the top outer wall of the sliding frame, and the cylinder is fixed to the top outer wall of the L-shaped plate, the output end of the cylinder is fixed with a lifting plate by a pin, and an edge sealing block is installed at the bottom of the lifting plate.

[0009] Further: the negative pressure assembly includes a vertical plate and a negative pressure pump, the vertical plate is fixed to the bottom of the sliding plate, and the negative pressure pump is fixed to the outer wall of one side of the vertical plate, the output end of the negative pressure pump is connected to a stuffing box through a joint, and the stuffing box and one end of the bent pipe are connected through a joint.

[0010] Further: a square plate is fixed to the outer wall of the top of the sliding frame, and a sliding rod is movably connected to the through hole opened on the surface of the square plate, and a spring three is clamped between the inner wall on one side of the sliding rod and the outer wall on one side of the square plate, and a rack is fixed to one end of the sliding rod, and the rack and the sliding plate are connected by a fixed rod, and the rack is driven by a gear part.

[0011] As a preferred solution of the present invention: the gear part includes a gear and a rotating column, the rotating column is movably connected to a mounting plate installed on the side wall of the sliding frame, and the gear is fixed to the circumferential outer wall of the rotating column by a pin, and a reel is fixed to the outer wall of the rotating column by a pin, and a pull rope is wound on the inner wall of the reel, and the end of the pull rope away from the reel is fixed to the top of the lifting plate.

[0012] As a further solution of the present invention: a support rod is fixed to the top of the sliding frame by screws, and a pulley for guiding the pull rope is movably connected to the outer wall of the support rod.

[0013] As a further solution of the present invention: a mounting frame is fixed to the top outer wall of the sliding frame, and a through hole opened in the top of the mounting frame is movably connected to a T-shaped rod, and a U-shaped frame is fixed to the bottom of the T-shaped rod, and a scraping block is fixed between the inner walls on both sides of the U-shaped frame, and a spring 1 is sleeved on the outer wall of the T-shaped rod, and the two ends of the spring 1 are respectively fixed to the top inner wall of the T-shaped rod and the top outer wall of the mounting frame.

[0014] On the basis of the above scheme: a middle block is welded to the outer wall of one side of the U-shaped frame, and a sleeve rod is welded to the outer wall of one side of the middle block, and the circumferential outer wall of the sleeve rod is movably connected to the limiting shell, and a coil spring is clamped between the inner wall of the limiting shell and the circumferential outer wall of the sleeve rod.

[0015] On the basis of the above-mentioned solution: a trapezoidal top plate is fixed to the outer wall of one side of the rack by screws.

[0016] The beneficial effects of the present invention are:

[0017] 1. A sealing device for producing flat masks, which can adsorb the mask body by providing a negative pressure component to ensure the stability of the mask body during edge sealing. At the same time, the negative pressure component can cooperate with a stuffing box to collect and process particulate matter generated after edge sealing.

[0018] 2. A edge sealing device for the production of flat masks. When the edge sealing block moves to fit the surface of the mask body, the pores are temporarily blocked, so that the piston plate drives the contact between the trigger block and the press switch under the action of negative pressure, and the press switch is used to control the heating of the edge sealing block to seal the mask body.

[0019] 3. An edge sealing device for the production of flat masks, which maintains a safe distance between the operator and the edge sealing block during the loading process by setting the sliding plate to a sliding type, thereby improving the safety during edge sealing.

[0020] 4. An edge sealing device for the production of flat masks, which uses a scraping block to scrape the mask body after the edge sealing is completed, so that the mask body finally falls through the sliding plate, realizing automatic unloading of the sliding plate, thereby avoiding the high residual temperature of the mask body after the edge sealing to cause harm to the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of an edge sealing device for producing a flat mask proposed by the present invention;

[0022] Figure 2 It is a schematic diagram of the side structure of an edge sealing device for producing flat masks proposed by the present invention;

[0023] Figure 3 It is a schematic diagram of the installation structure of a pusher assembly of an edge sealing device for producing a flat mask proposed by the present invention;

[0024] Figure 4 It is a schematic diagram of the main structure of a pusher assembly of an edge sealing device for producing flat masks proposed by the present invention;

[0025] Figure 5 It is a schematic diagram of the partial structure of a pusher assembly of an edge sealing device for producing flat masks proposed by the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of a driving component of an edge sealing device for producing a flat mask proposed by the present invention;

[0027] Figure 7 It is a schematic diagram of the overall structure of a placement component of an edge sealing device for flat mask production proposed by the present invention;

[0028] Figure 8 It is a schematic diagram of the internal structure of a placement component of an edge sealing device for producing flat masks proposed by the present invention.

[0029] In the figure: base 1; sliding frame 2; sliding plate 3; air hole 4; rack 5; U-shaped frame 6; gear 7; sliding rod 8; cylinder 9; scraper block 10; cover plate 11; elbow 12; vertical plate 13; negative pressure pump 14; L-shaped plate 15; T-shaped rod 16; spring one 17; mounting frame 18; trapezoidal top plate 19; intermediate block 20; sleeve rod 21; coil spring 22; limit shell 23; rotating column 24; supporting rod 25; fixing rod 26; pull rope 27; pulley 28; reel 29; edge sealing block 30; stuffing box 31; lifting plate 32; side tube 33; trigger block 34; guide rod 35; push switch 36; disc frame 37; piston plate 38; spring two 39; push switch 36; square plate 41; spring three 42. DETAILED DESCRIPTION

[0030] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] Embodiment 1:

[0033] An edge sealing device for producing flat masks, such as Figures 1 to 8As shown, it includes a base 1, a sliding frame 2 is fixed to the top outer wall of the base 1 by bolts, and a sliding plate 3 is slidably connected between the two sliding frames 2, an edge sealing component is fixed to the top outer wall of the sliding frame 2, an air hole 4 is opened on the surface of the sliding plate 3, and a cover plate 11 used in conjunction with the air hole 4 is fixed to the bottom of the sliding plate 3, and a bent pipe 12 is fixed to the bottom of the cover plate 11 by bolts, and a negative pressure component is installed at one end of the bent pipe 12 away from the cover plate 11, a side pipe 33 is welded to the side wall of the bent pipe 12, and a disc frame 37 is embedded in the circumferential inner wall of the side pipe 33, and the disc frame The through hole on the surface of 37 is slidably connected with a guide rod 35, and a piston plate 38 adapted to the inner diameter of the side tube 33 is fixed to one end of the guide rod 35 by screws, and a trigger block 34 is fixed to the other end of the guide rod 35 by screws, a hanging plate 40 is fixed to the inner wall of the top of the side tube 33 by screws, and a push switch 36 used in conjunction with the trigger block 34 is fixed to the outer wall of one side of the hanging plate 40, and the push switch 36 is electrically connected to the edge sealing assembly, and a spring 2 39 is sleeved on the outer wall of the guide rod 35, and the spring 2 39 is fixed between the piston plate 38 and the disc frame 37;

[0034] When it is necessary to seal the edge of the mask body, after placing the mask body at the air hole 4, the negative pressure generated by the negative pressure component is used to make the mask body adsorbed on the sliding plate 3, so as to avoid displacement of the mask body during the edge sealing process affecting the edge sealing accuracy. When the sliding plate 3 slides along the sliding frame 2 to the bottom of the edge sealing component, the edge sealing component moves down and is pressed on the top of the mask body to seal the edge of the mask body. When the edge sealing component is pressed on the top of the mask body, the edge sealing component will temporarily block the air hole 4. At this time, part of the negative pressure generated by the negative pressure component will be diverted by the side tube 33. After the diversion, the negative pressure will attract the piston plate 38, causing the piston plate 38 to move along The side tube 33 slides, and during this process the trigger block 34 moves towards the direction close to the press switch 36 under the drive of the piston plate 38 and the guide rod 35. When the trigger block 34 moves to contact the press switch 36, the trigger block 34 presses the press switch 36 to turn on. After turning on the press switch 36, the edge sealing component generates heat to seal the mask body. When the edge sealing is completed and the edge sealing component is detached from the mask body, the piston plate 38 will detach from the trigger block 34 and the press switch 36 under the action of the rebound force of the spring 2 39, so that the edge sealing component no longer generates heat, thereby reducing the production cost during edge sealing.

[0035] Further, the edge sealing assembly includes a cylinder 9 and an L-shaped plate 15, the L-shaped plate 15 is fixed to the top outer wall of the sliding frame 2 by bolts, and the cylinder 9 is fixed to the top outer wall of the L-shaped plate 15 by bolts, and the output end of the cylinder 9 is fixed with a lifting plate 32 by a pin, and the bottom of the lifting plate 32 is installed with an edge sealing block 30;

[0036] When the mask body is edge-sealed, the air cylinder 9 is used to drive the edge-sealing block 30 and the lifting plate 32 to move downward, and when the edge-sealing block 30 moves to the top of the mask body, the mask body is heat-pressed and edge-sealed.

[0037] Furthermore, the negative pressure assembly includes a vertical plate 13 and a negative pressure pump 14, the vertical plate 13 is fixed to the bottom of the sliding plate 3 by bolts, and the negative pressure pump 14 is fixed to the outer wall of one side of the vertical plate 13 by bolts, the output end of the negative pressure pump 14 is connected to a stuffing box 31 through a joint, and the stuffing box 31 and one end of the elbow 12 are connected through a joint;

[0038] The negative pressure generated after the negative pressure pump 14 is started can absorb the mask body and part of the particles remaining after the edge sealing of the mask body. The particles are sucked into the stuffing box 31 through the air holes 4 and the cover plate 11 for storage.

[0039] Furthermore, a square plate 41 is fixed to the outer wall of the top of the sliding frame 2 by bolts, and a sliding rod 8 is slidably connected to a through hole opened on the surface of the square plate 41, and a spring 42 is clamped between the inner wall of one side of the sliding rod 8 and the outer wall of one side of the square plate 41, and a rack 5 is fixed to one end of the sliding rod 8 by bolts, and the rack 5 and the sliding plate 3 are connected by a fixing rod 26, and the rack 5 is driven by a gear member;

[0040] When the mask body is edge-sealed, after the mask body is placed on the sliding plate 3, the gear part is used to drive the rack 5 to move along the sliding frame 2, so that the sliding plate 3 delivers the mask body to the bottom of the edge-sealing block 30. By setting the mask body to slide and load using the sliding plate 3, the safety of the edge-sealing process can be guaranteed compared to placing the mask body directly at the bottom of the edge-sealing block 30, thereby avoiding the occurrence of safety accidents caused by the edge-sealing block 30 accidentally moving downward before edge-sealing.

[0041] Further, the gear member includes a gear 7 and a rotating column 24, the rotating column 24 is rotatably connected to a mounting plate mounted on the side wall of the sliding frame 2, and the gear 7 is fixed to the circumferential outer wall of the rotating column 24 by a pin, and a reel 29 is fixed to the outer wall of the rotating column 24 by a pin, and a pull rope 27 is wound around the inner wall of the reel 29, and one end of the pull rope 27 away from the reel 29 is fixed to the top of the lifting plate 32, and a support rod 25 is fixed to the top of the sliding frame 2 by screws, and a pulley 28 for guiding the pull rope 27 is rotatably connected to the outer wall of the support rod 25;

[0042] When the cylinder 9 drives the lifting plate 32 and the edge sealing block 30 to move downward to seal the mask body, the connection effect of the pull rope 27 is used to pull the reel 29. The reel 29 rotates itself after being pulled by the pull rope 27. During the rotation of the reel 29, the gear 7 drives the rack 5 to move laterally under the guidance of the slide rod 8 and the square plate 41, so that the sliding plate 3 drives the mask body to move toward the bottom of the edge sealing block 30. When the edge sealing block 30 and the mask body are in contact, the critical position is reached between the sliding plate 3 and the edge sealing block 30, and the edge sealing block 30 seals the mask body after heating.

[0043] When the present embodiment is in use, the mask body that needs edge sealing is first placed on the sliding plate 3, and the negative pressure generated by the negative pressure pump 14 is used to make the mask body be adsorbed on the top of the sliding plate 3 to prevent the mask body from shaking during the edge sealing process. Then, the cylinder 9 is used to drive the edge sealing block 30 and the lifting plate 32 to move downward. In this process, the gear member is used to drive the rack 5 and the sliding plate 3 to slide along the sliding frame 2, so that the mask body on the sliding plate 3 moves toward a position close to the bottom of the edge sealing block 30. When the edge sealing block 30 and the mask body are in a critical position, the edge sealing block 30 and the top of the mask body are pressed together. At this time, since the air hole 4 is blocked by the edge sealing block 30, the piston plate 38 is pulled under the action of negative pressure, and the trigger block 34 moves toward the direction close to the press switch 36. When the trigger block 34 moves to contact with the press switch 36, the press switch 36 is turned on to control the edge sealing block 30 to start generating heat to seal the mask body.

[0044] Embodiment 2:

[0045] An edge sealing device for producing flat masks, such as Figures 1 to 8 As shown, in order to facilitate the blanking of the mask body after edge sealing; this embodiment makes the following improvements on the basis of embodiment 1: the top outer wall of the sliding frame 2 is fixed with a mounting frame 18 by bolts, and the through hole opened at the top of the mounting frame 18 is slidably connected with a T-shaped rod 16, and a U-shaped frame 6 is fixed at the bottom of the T-shaped rod 16, and a scraper block 10 is fixed between the inner walls on both sides of the U-shaped frame 6, and the outer wall of the T-shaped rod 16 is sleeved with a spring 17, and the two ends of the spring 17 are respectively fixed to the top inner wall of the T-shaped rod 16 and the top outer wall of the mounting frame 18;

[0046] A trapezoidal top plate 19 is fixed to the outer wall of one side of the rack 5 by screws, and an intermediate block 20 is welded to the outer wall of one side of the U-shaped frame 6, and a sleeve rod 21 is welded to the outer wall of one side of the intermediate block 20, and the outer wall of the circumference of the sleeve rod 21 is rotatably connected to a limit shell 23, and a coil spring 22 is clamped between the inner wall of the limit shell 23 and the outer wall of the circumference of the sleeve rod 21;

[0047] When the sliding plate 3 moves the mask body to the bottom of the edge sealing block 30, the trapezoidal top plate 19 is used to push the outer wall of one side of the limiting shell 23, and the limiting shell 23 gradually slides along the inclined surface at the end of the trapezoidal top plate 19 to the top of the trapezoidal top plate 19, so that a certain gap is generated between the bottom of the scraper block 10 and the top of the sliding plate 3, so that the mask body can pass through. When the limiting shell 23 is detached from the inclined surface at the other end of the trapezoidal top plate 19, the scraper block 10 moves to the surface of the sliding plate 3 under the action of the rebound force of the spring 17. After the main body edge sealing is completed, the sliding plate 3 moves in the reverse direction and resets, and the trapezoidal top plate 19 pushes the other end of the limit shell 23. During this process, the coil spring 22 will be deformed, and the scraper block 10 will maintain the fit with the top of the sliding plate 3. Therefore, during the resetting process of the sliding plate 3, the scraper block 10 is used to scrape the mask body on the sliding plate 3, so that the mask body finally falls through the sliding plate 3, realizing automatic unloading of the sliding plate 3, thereby avoiding the high residual temperature of the mask body after edge sealing to cause harm to the operator.

[0048] The above is a preferred specific implementation manner of the present invention, and the protection scope of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by any technician familiar with the field within the technical scope disclosed by the present invention in combination with the prior art or public common sense, within the spirit and principle of the present invention, shall be covered by the protection scope of the present invention.

Claims

1. An edge sealing device for producing flat masks, comprising a base (1), characterized in that: A sliding frame (2) is fixed to the top outer wall of the base (1), and a sliding plate (3) is movably connected between the two sliding frames (2), an edge sealing assembly is fixed to the top outer wall of the sliding frame (2), an air hole (4) is opened on the surface of the sliding plate (3), and a cover plate (11) used in conjunction with the air hole (4) is fixed to the bottom of the sliding plate (3), and a bent pipe (12) is fixed to the bottom of the cover plate (11), and a negative pressure assembly is installed at one end of the bent pipe (12) away from the cover plate (11), a side pipe (33) is welded to the side wall of the bent pipe (12), and a disc-shaped frame (37) is embedded in the circumferential inner wall of the side pipe (33). ), and the through hole opened on the surface of the disc frame (37) is movably connected with a guide rod (35), and one end of the guide rod (35) is fixed with a piston plate (38) adapted to the inner diameter of the side tube (33) by screws, and the other end of the guide rod (35) is fixed with a trigger block (34) by screws, and a hanging plate (40) is fixed to the inner wall of the top of the side tube (33) by screws, and a push switch (36) used in conjunction with the trigger block (34) is fixed to the outer wall of one side of the hanging plate (40), and the push switch (36) and the edge sealing assembly are electrically connected, and the outer wall of the guide rod (35) is sleeved with a spring 2 (39).

2. The edge sealing device for producing flat masks according to claim 1, characterized in that: The edge sealing assembly comprises a cylinder (9) and an L-shaped plate (15), wherein the L-shaped plate (15) is fixed to the top outer wall of the sliding frame (2), and the cylinder (9) is fixed to the top outer wall of the L-shaped plate (15), a lifting plate (32) is fixed to the output end of the cylinder (9) via a pin, and an edge sealing block (30) is installed at the bottom of the lifting plate (32).

3. The edge sealing device for producing flat masks according to claim 2, characterized in that: The negative pressure assembly comprises a vertical plate (13) and a negative pressure pump (14); the vertical plate (13) is fixed to the bottom of the sliding plate (3), and the negative pressure pump (14) is fixed to the outer wall of one side of the vertical plate (13); the output end of the negative pressure pump (14) is connected to a stuffing box (31) via a joint, and the stuffing box (31) and one end of the bent pipe (12) are connected via a joint.

4. The edge sealing device for producing flat masks according to claim 3, characterized in that: A square plate (41) is fixed to the outer wall of the top of the sliding frame (2), and a through hole opened on the surface of the square plate (41) is movably connected to a sliding rod (8), and a spring three (42) is clamped between the inner wall of one side of the sliding rod (8) and the outer wall of one side of the square plate (41), and a rack (5) is fixed to one end of the sliding rod (8), and the rack (5) and the sliding plate (3) are connected via a fixing rod (26), and the rack (5) is driven by a gear member.

5. The edge sealing device for producing flat masks according to claim 4, characterized in that: The gear member comprises a gear (7) and a rotating column (24), wherein the rotating column (24) is movably connected to a mounting plate mounted on a side wall of the sliding frame (2), and the gear (7) is fixed to the circumferential outer wall of the rotating column (24) by a pin, and a reel (29) is fixed to the outer wall of the rotating column (24) by a pin, and a pull rope (27) is wound around the inner wall of the reel (29), and one end of the pull rope (27) away from the reel (29) is fixed to the top of the lifting plate (32).

6. The edge sealing device for producing flat masks according to claim 5, characterized in that: A support rod (25) is fixed to the top of the sliding frame (2) by screws, and a pulley (28) for guiding the pull rope (27) is movably connected to the outer wall of the support rod (25).

7. The edge sealing device for producing flat masks according to claim 6, characterized in that: A mounting frame (18) is fixed to the outer wall of the top of the sliding frame (2), and a through hole opened at the top of the mounting frame (18) is movably connected to a T-shaped rod (16), and a U-shaped frame (6) is fixed to the bottom of the T-shaped rod (16), and a scraper block (10) is fixed between the inner walls on both sides of the U-shaped frame (6), and a spring (17) is sleeved on the outer wall of the T-shaped rod (16), and the two ends of the spring (17) are respectively fixed to the inner wall of the top of the T-shaped rod (16) and the outer wall of the top of the mounting frame (18).

8. The edge sealing device for producing flat masks according to claim 7, characterized in that: An intermediate block (20) is welded to the outer wall of one side of the U-shaped frame (6), and a sleeve rod (21) is welded to the outer wall of one side of the intermediate block (20), and the circumferential outer wall of the sleeve rod (21) is movably connected to a limit shell (23), and a coil spring (22) is clamped between the inner wall of the limit shell (23) and the circumferential outer wall of the sleeve rod (21).

9. The edge sealing device for producing flat masks according to claim 8, characterized in that: A trapezoidal top plate (19) is fixed to an outer wall of one side of the rack (5) by means of screws.

Citation Information

Patent Citations

  • Edge sealing device for plane mask production

    CN217891900U