CN110190334B - Drawer type power battery secondary sealing machine - Google Patents
Drawer type power battery secondary sealing machine Download PDFInfo
- Publication number
- CN110190334B CN110190334B CN201910385488.7A CN201910385488A CN110190334B CN 110190334 B CN110190334 B CN 110190334B CN 201910385488 A CN201910385488 A CN 201910385488A CN 110190334 B CN110190334 B CN 110190334B
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- Prior art keywords
- sealing
- cavity
- adjusting
- packaging
- plate
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- 238000007789 sealing Methods 0.000 title claims abstract description 59
- 230000007246 mechanism Effects 0.000 claims abstract description 53
- 238000004806 packaging method and process Methods 0.000 claims abstract description 48
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 238000005538 encapsulation Methods 0.000 claims description 14
- 230000000694 effects Effects 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052744 lithium Inorganic materials 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 239000003792 electrolyte Substances 0.000 description 4
- 238000009461 vacuum packaging Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000009517 secondary packaging Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a drawer type power battery secondary sealing machine which comprises a machine base, a sealing cavity, a movable feeding mechanism, a puncturing mechanism, a vacuumizing mechanism and a sealing mechanism, wherein the sealing cavity is arranged on the machine base, a slot hole penetrating through the back side wall of the sealing cavity is formed in the sealing cavity in a front-back mode, the movable feeding mechanism is installed in the sealing cavity through the slot hole in a drawer mode, the movable feeding mechanism comprises a feeding plate used for conveying a battery between an upper sealing head and a lower sealing head, the rear end of the feeding plate is provided with a sealing part used for sealing the slot hole, the upper surface of the feeding plate is provided with a battery placing position, and the battery placing position is provided with a first abdicating groove for the lower sealing head to penetrate through. According to the invention, the single packaging cavity is arranged, and the movable feeding mechanism with the drawer type structure is arranged in the packaging cavity, so that the structure of the battery packaging equipment is simplified, the frequent replacement of the lithium battery production specification is facilitated, and the conversion time and the maintenance cost are reduced.
Description
Technical Field
The invention relates to the technical field of battery packaging, in particular to a drawer type power battery secondary packaging machine.
Background
Vacuum packaging is one of the main processes for producing and manufacturing lithium ion battery cells, and the process specifically needs the procedures of air bag puncture, liquid pumping, battery cell shaping, packaging, residual liquid collection and the like; and these processes are all mainly required to be completed in a closed vacuum cavity. The traditional vacuum packaging cavity mechanism mainly comprises an upper cavity, a lower cavity, a movable cavity and other mechanisms, a closed vacuum packaging cavity is formed by the vertical movement of the upper cavity and the lower cavity, and the structure of each procedure is mainly arranged in the upper cavity or the lower cavity, so that the traditional vacuum packaging cavity has the advantages of complex structure, large volume, split type, small applicable battery range, low battery positioning precision, unstable seal, small maintenance and debugging space, inconvenient mold changing, and unadjustable cavity inclination angle fixation, and is not suitable for packaging large-sized long-sized power batteries.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides a drawer type power battery secondary sealing machine which can simplify the structure of a packaging cavity, reduce the equipment maintenance and debugging time, reduce the conversion time and improve the stability of battery sealing.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a two sealing machines of drawer type power battery, includes frame, encapsulation cavity, activity feeding mechanism, punctures mechanism, evacuation mechanism and encapsulation mechanism, the encapsulation cavity is located on the frame, encapsulation mechanism is including locating the upper cover and the lower cover in the encapsulation cavity, the up end of encapsulation cavity is equipped with the last encapsulation cylinder that is used for driving the upper cover to reciprocate, the lower terminal surface of encapsulation cavity is equipped with the lower encapsulation cylinder that is used for driving the lower cover to reciprocate, the back lateral wall of encapsulation cavity is equipped with the slotted hole that runs through from beginning to end, activity feeding mechanism passes through slotted hole drawer type and installs in the encapsulation cavity, activity feeding mechanism is including being used for carrying the charge board between upper cover and the lower cover with the battery, the rear end of charge board is equipped with the sealing portion that is used for shutoff slotted hole, the upper surface of charge board is equipped with the battery and places the position, the battery is placed the position and is equipped with the first groove of stepping down that supplies the lower cover to pass.
As a preferable scheme, the back side of the packaging cavity is provided with a supporting plate which extends outwards, the supporting plate is provided with a first guide rail which extends towards the direction of the slot, and the back end of the feeding plate is movably arranged on the first guide rail through a first sliding block.
As a preferable scheme, a second guide rail which is arranged in parallel with the first guide rail is arranged in the packaging cavity, and the front end of the feeding plate is movably arranged on the second guide rail through a second sliding block.
As a preferred scheme, the movable feeding mechanism further comprises a first driving assembly used for driving the feeding plate to slide along the first guide rail, the first driving assembly comprises a first driving motor and a first ball screw, the first ball screw is arranged below the supporting plate and can be driven to rotate by the first driving motor, the rear end of the feeding plate is connected with the first ball screw through a connecting piece, and a second yielding groove corresponding to the connecting piece is formed in the supporting plate.
As a preferable scheme, the sealing part is a sealing plate fixedly arranged at the rear end of the feeding plate, and the front surface of the sealing plate is provided with a sealing strip which is matched with the outer side edge shape of the slot hole.
As a preferred scheme, the device also comprises a cavity inclination adjusting mechanism, wherein the cavity inclination adjusting mechanism comprises an adjusting platform and an inclination adjusting driving assembly, the adjusting platform is rotatably arranged on the machine base through a rotating shaft, the packaging cavity is fixedly arranged on the adjusting platform, and the inclination adjusting driving assembly is movably connected with the adjusting platform through a connecting assembly and drives the adjusting platform to swing around the rotating shaft.
As a preferred scheme, the inclination adjustment driving assembly comprises an adjustment mounting plate, a second driving motor, a second ball screw driven by the second driving motor to rotate and an adjustment sliding seat driven by the second ball screw to slide, wherein the second driving motor is fixedly arranged on the base through the adjustment mounting plate, a third guide rail which extends vertically is arranged on the adjustment mounting plate, the adjustment sliding seat is movably arranged on the third guide rail and can slide up and down along the third guide rail, and the adjustment sliding seat is rotationally connected with the connecting assembly.
As a preferred scheme, coupling assembling includes connecting rod and connecting plate, connecting rod fixed mounting in adjustment platform one end and with adjustment platform terminal surface parallel arrangement, the upper and lower both ends of connecting plate are connected with connecting rod and adjustment slide rotation respectively.
As a preferable scheme, the front side of the packaging cavity is provided with a front opening, the front opening is provided with a sealing door, and one side of the sealing door is connected with one side of the front opening through a hinge.
As a preferable scheme, the upper end socket and the lower end socket are connected with the heating component.
The working process of the invention is as follows:
firstly, the feeding plate of the movable feeding mechanism slides outwards along the first guide rail, after a power supply is manually placed on a battery placement position of the feeding plate, the feeding plate is driven by the first driving assembly to enter the packaging cavity, then the battery is pierced by the piercing mechanism, the packaging cavity is vacuumized by the vacuumizing mechanism, redundant electrolyte is pumped out, the battery is packaged in a vacuum state, finally, the battery is packaged by the packaging mechanism, and all the batteries are reset after the packaging is completed so as to be packaged next time.
Compared with the prior art, the invention has obvious advantages and beneficial effects, in particular, by arranging a single packaging cavity and arranging the movable feeding mechanism with a drawer structure in the packaging cavity, the structure of battery packaging equipment is simplified, the invention is beneficial to adapting to the frequent replacement of the production specification of the lithium battery, and reduces the conversion time and maintenance cost of the conversion; meanwhile, the step of closing the cavity during packaging is reduced, the packaging efficiency and the stability of sealing the battery are improved, and the maintenance of equipment is more convenient; through setting up cavity inclination adjustment mechanism to adjustable encapsulation cavity's inclination realizes the regulation to the liquid-retaining volume of battery electrolyte.
For a clearer description of the structural features, technical means, and specific objects and functions achieved by the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments:
drawings
FIG. 1 is an assembled block diagram of an embodiment of the present invention;
FIG. 2 is a block diagram of a packaging mechanism according to an embodiment of the present invention;
FIG. 3 is a mounting block diagram of a movable feed mechanism according to an embodiment of the present invention;
FIG. 4 is an assembled block diagram of a chamber tilt adjustment mechanism according to an embodiment of the present invention;
FIG. 5 is a side view block diagram of a cavity tilt adjustment mechanism according to an embodiment of the present invention;
FIG. 6 is an assembled block diagram of a package cavity according to an embodiment of the present invention.
Detailed Description
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and to simplify the description, and do not indicate or imply that the positions or elements referred to must have specific directions, be configured and operated in specific directions, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
As shown in fig. 1-6, a drawer type power battery secondary sealing machine comprises a machine base 10, a sealing cavity 30, a movable feeding mechanism 40, a puncturing mechanism (not shown in the figure), a vacuumizing mechanism (not shown in the figure), a cavity inclination adjusting mechanism 20 and a sealing mechanism 50, wherein the sealing cavity 30 is arranged on the machine base 10, the sealing mechanism 50 comprises an upper sealing head 51 and a lower sealing head 53 which are arranged in the sealing cavity 30, an upper sealing cylinder 52 for driving the upper sealing head 51 to move up and down is arranged on the upper end face of the sealing cavity 30, a lower sealing cylinder 54 for driving the lower sealing head 53 to move up and down is arranged on the lower end face of the sealing cavity 30, and the upper sealing head 51 and the lower sealing head 53 are connected with a heating component 55. The rear side wall of the packaging cavity 30 is provided with a slot hole 31 penetrating front and back, and the movable feeding mechanism 40 is installed in the packaging cavity 30 in a drawer mode through the slot hole 31.
As shown in fig. 3, the movable feeding mechanism 40 includes a feeding plate 41 for conveying the battery between the upper end enclosure 51 and the lower end enclosure 53, a sealing portion 42 for sealing the slot hole 31 is disposed at the rear end of the feeding plate 41, a battery placement position 45 is disposed on the upper surface of the feeding plate 41, and a first yielding groove for the lower end enclosure 53 to pass through is disposed on the battery placement position 45. The rear side of the packaging cavity 30 is provided with an outwards extending supporting plate 32, the supporting plate 32 is provided with a first guide rail 33 extending towards the direction of the slotted hole 31, and the rear end of the feeding plate 41 is movably arranged on the first guide rail 33 through a first sliding block 43. The second guide rail 36 parallel to the first guide rail 33 is disposed in the packaging cavity 30, and the front end of the feeding plate 41 is movably mounted on the second guide rail 36 through a second slider 44. The movable feeding mechanism 40 further comprises a first driving assembly for driving the feeding plate 41 to slide along the first guide rail 33, the first driving assembly comprises a first driving motor and a first ball screw, the first ball screw is arranged below the supporting plate 32 and can be driven to rotate by the first driving motor, the rear end of the feeding plate 41 is connected with the first ball screw through a connecting piece 35, and the supporting plate 32 is provided with a second abdicating groove 34 corresponding to the connecting piece.
In the present invention, the sealing part 42 is a sealing plate fixedly mounted at the rear end of the feeding plate 41, and a sealing strip adapted to the shape of the outer edge of the slot 31 is provided on the front surface of the sealing plate.
As shown in fig. 4-5, the cavity tilt adjusting mechanism 20 includes an adjusting platform 27 and a tilt adjusting driving assembly, the base 10 is provided with a supporting seat 29, the adjusting platform 27 is rotatably mounted on the supporting seat 29 through a rotating shaft 28, the packaging cavity 30 is fixedly mounted on the adjusting platform 27, and the tilt adjusting driving assembly is movably connected with the adjusting platform 27 through a connecting assembly and drives the adjusting platform 27 to swing around the rotating shaft 28. The tilt adjusting driving assembly comprises an adjusting mounting plate 21, a second driving motor 22, a second ball screw driven by the second driving motor 22 to rotate and an adjusting sliding seat 24 driven by the second ball screw to slide, the second driving motor 22 is fixedly mounted on the base 10 through the adjusting mounting plate 21, a third guide rail 23 extending vertically is arranged on the adjusting mounting plate 21, the adjusting sliding seat 24 is movably mounted on the third guide rail 23 and can slide up and down along the third guide rail 23, and the adjusting sliding seat 24 is rotationally connected with the connecting assembly. The connecting assembly comprises a connecting rod 26 and a connecting plate 25, wherein the connecting rod 26 is fixedly arranged at one end of the adjusting platform 27 and is parallel to the end face of the adjusting platform 27, and the upper end and the lower end of the connecting plate 25 are respectively and rotatably connected with the connecting rod 26 and the adjusting sliding seat 24. When the device works, the second driving motor 22 drives the adjusting sliding seat 24 to slide along the third guide rail 23 through the second ball screw, the adjusting sliding seat 24 controls the rotating angle of the adjusting platform 27 around the rotating shaft 28 through the connecting rod 26, so that the inclination angle of the packaging cavity 30 arranged on the adjusting platform 27 is adjusted within 0-20 degrees, the retention amount of electrolyte is effectively controlled, and the packaging quality of a battery is improved.
As shown in fig. 6, a front opening is provided on the front side of the packaging cavity 30, a sealing door 37 is provided on the front opening, one side of the sealing door 37 is connected with one side of the front opening through a hinge, and a transparent observation window is provided on the sealing door 37.
The working process of the invention is as follows:
firstly, the feeding plate 41 of the movable feeding mechanism 40 slides outwards along the first guide rail 33, after a power supply is manually placed on the battery placement position 45 of the feeding plate 41, the first driving assembly drives the feeding plate 41 to enter the packaging cavity 30, then the battery is pierced by the piercing mechanism, the packaging cavity 30 is vacuumized by the vacuumizing mechanism, the redundant electrolyte is pumped out, the battery is packaged in a vacuum state, finally, the battery is packaged by the packaging mechanism 50, and all the batteries are reset after the packaging is completed so as to be packaged next time.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, so any modifications, equivalents, improvements, etc. of the above embodiments according to the present invention are still within the scope of the present invention.
Claims (7)
1. The utility model provides a two machine of sealing of drawer type power battery, includes frame, encapsulation cavity, activity feeding mechanism, punctures mechanism, evacuation mechanism and encapsulation mechanism, its characterized in that: the packaging mechanism comprises an upper end socket and a lower end socket which are arranged in the packaging cavity, an upper packaging cylinder used for driving the upper end socket to move up and down is arranged on the upper end surface of the packaging cavity, a lower packaging cylinder used for driving the lower end socket to move up and down is arranged on the lower end surface of the packaging cavity, a slot hole penetrating through the back side wall of the packaging cavity from front to back is formed in the packaging cavity, the movable feeding mechanism is arranged in the packaging cavity through a slot hole drawer, the movable feeding mechanism comprises a feeding plate used for conveying a battery between the upper end socket and the lower end socket, a sealing part used for sealing the slot hole is arranged at the rear end of the feeding plate, a sealing plate fixedly arranged at the rear end of the feeding plate is arranged on the front surface of the sealing plate, a sealing strip matched with the outer edge shape of the slot hole is arranged on the upper surface of the feeding plate, and a first yielding groove used for the lower end socket to penetrate through is formed in the battery yielding position; the packaging structure is characterized in that the back side surface of the packaging cavity is provided with an outwards extending supporting plate, the supporting plate is provided with a first guide rail extending towards the direction of the slot hole, the back end of the feeding plate is movably arranged on the first guide rail through a first sliding block, the packaging cavity is internally provided with a second guide rail parallel to the first guide rail, and the front end of the feeding plate is movably arranged on the second guide rail through a second sliding block.
2. The drawer type power battery secondary seal machine as claimed in claim 1 wherein: the movable feeding mechanism further comprises a first driving assembly used for driving the feeding plate to slide along the first guide rail, the first driving assembly comprises a first driving motor and a first ball screw, the first ball screw is arranged below the supporting plate and can be driven to rotate by the first driving motor, the rear end of the feeding plate is connected with the first ball screw through a connecting piece, and a second abdicating groove corresponding to the connecting piece is formed in the supporting plate.
3. The drawer type power battery secondary seal machine as claimed in claim 1 wherein: the packaging structure is characterized by further comprising a cavity inclination adjusting mechanism, wherein the cavity inclination adjusting mechanism comprises an adjusting platform and an inclination adjusting driving assembly, the adjusting platform is rotatably arranged on the machine base through a rotating shaft, the packaging cavity is fixedly arranged on the adjusting platform, and the inclination adjusting driving assembly is movably connected with the adjusting platform through a connecting assembly and drives the adjusting platform to swing around the rotating shaft.
4. The drawer-type power battery secondary sealing machine according to claim 3, wherein: the tilt adjusting driving assembly comprises an adjusting mounting plate, a second driving motor, a second ball screw driven by the second driving motor to rotate and an adjusting sliding seat driven by the second ball screw to slide, the second driving motor is fixedly mounted on the base through the adjusting mounting plate, a third guide rail extending vertically is arranged on the adjusting mounting plate, the adjusting sliding seat is movably mounted on the third guide rail and can slide up and down along the third guide rail, and the adjusting sliding seat is rotationally connected with the connecting assembly.
5. The drawer type power battery secondary seal machine as claimed in claim 4 wherein: the connecting assembly comprises a connecting rod and a connecting plate, wherein the connecting rod is fixedly arranged at one end of the adjusting platform and is parallel to the end face of the adjusting platform, and the upper end and the lower end of the connecting plate are respectively connected with the connecting rod and the adjusting sliding seat in a rotating mode.
6. The drawer type power battery secondary seal machine as claimed in claim 1 wherein: the front side of the packaging cavity is provided with a front opening, the front opening is provided with a sealing door, and one side of the sealing door is connected with one side of the front opening through a hinge.
7. The drawer type power battery secondary seal machine as claimed in claim 1 wherein: the upper end socket and the lower end socket are connected with the heating component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910385488.7A CN110190334B (en) | 2019-05-09 | 2019-05-09 | Drawer type power battery secondary sealing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910385488.7A CN110190334B (en) | 2019-05-09 | 2019-05-09 | Drawer type power battery secondary sealing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110190334A CN110190334A (en) | 2019-08-30 |
| CN110190334B true CN110190334B (en) | 2024-04-16 |
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ID=67714427
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910385488.7A Active CN110190334B (en) | 2019-05-09 | 2019-05-09 | Drawer type power battery secondary sealing machine |
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| CN (1) | CN110190334B (en) |
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| CN207651593U (en) * | 2017-12-02 | 2018-07-24 | 广东鸿宝科技有限公司 | A kind of heating, vacuum sealing machine |
| CN108717983A (en) * | 2018-06-27 | 2018-10-30 | 广东新宇智能装备有限公司 | A kind of vacuum seal chamber mechanism |
| CN208806322U (en) * | 2018-08-17 | 2019-04-30 | 惠州市汇艺机械设备有限公司 | A kind of two envelope packaging system of rectangular cell multistation |
| CN109119700A (en) * | 2018-09-03 | 2019-01-01 | 东莞市傲途智能装备有限公司 | Cell package equipment |
| CN210092245U (en) * | 2019-05-09 | 2020-02-18 | 广东鸿宝科技有限公司 | Drawer type power battery secondary sealing machine |
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| CN110190334A (en) | 2019-08-30 |
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