CN207964202U - A kind of air-tightness detection device of sealing structure - Google Patents
A kind of air-tightness detection device of sealing structure Download PDFInfo
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- CN207964202U CN207964202U CN201721598724.6U CN201721598724U CN207964202U CN 207964202 U CN207964202 U CN 207964202U CN 201721598724 U CN201721598724 U CN 201721598724U CN 207964202 U CN207964202 U CN 207964202U
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Abstract
This case discloses a kind of air-tightness detection device of sealing structure, includes：Pedestal；Supply unit, it is movably arranged on the pedestal, the support base for fixing workpiece to be checked is provided on the supply unit, it is provided with gasket on the support base, a vessel is formed between the gasket and workpiece to be checked, the vessel upper end is opening, and the gas nozzle being connected with the vessel is additionally provided in the support base；Fixed cell, is set to the top of the supply unit, and the fixed cell includes the first pushing component that pressure head and the driving pressure head move up and down；Unit is sealed, the sealing unit includes that folding and unfolding component and second push component；Position detection unit is set to the side of the supply unit；Wherein, quick connector is provided on the mobile route of support base, the other side of the supply unit is provided with Buffer Unit.The detection device of this case can realize the accurate air-tightness for measuring sealing structure.
Description
Technical field
This case is related to air tightness detection equipment field, more particularly to a kind of air-tightness detection device of sealing structure.
Background technology
Higher and higher to the waterproof requirement of electronic product currently on the market, this requires in the manufacturing process of electronic product
To carrying out stringent air-leakage test after electronic product parts sealing.
The main means for carrying out air-leakage test to workpiece in the prior art are to connect at workpiece both ends using sealing ring sealing
It connects, then carries out airtight detection.But it has to apply pressure to workpiece to be checked using sealing ring sealed connection, due to the pressure of pushing
Power can make the gap between the parts and sealant become smaller, and gap can so that the leakproofness of the two is carried after becoming smaller
It rises, however this product that may result in the not good enough problem of physical presence leakproofness is missed, and greatly reduces detection success rate and inspection
Survey precision, for cause after stress sealant layer air-leakage test be distorted the case where, do not provide specific solution in the prior art
Scheme.
Utility model content
For the shortcomings of the prior art, the purpose of this utility model is to provide a kind of the airtight of sealing structure
Property detection device, while improving sealing propertytest precision, additionally it is possible to improve the success rate of sealing propertytest, avoid missing inspection
Or flase drop.
In order to realize these purposes and other advantages according to the present utility model, a kind of air-tightness of sealing structure is provided
Detection device, including:
Pedestal；
Supply unit is movably arranged on the pedestal, for conveying workpiece to be checked back and forth, is set on the supply unit
It is equipped with the support base for fixing workpiece to be checked, gasket is provided on the support base, between the gasket and workpiece to be checked
A vessel is formed, which is opening, and the gas nozzle being connected with the vessel is additionally provided in the support base；
Fixed cell is set to the top of the supply unit, for pressing fixed workpiece to be checked, the fixed cell
Component is pushed including pressure head and the driving pressure head move up and down first；
Unit is sealed, is used to close the opening, the sealing unit includes the folding and unfolding group for folding and unfolding sealing tape
Part and push component for adhesive tape to be pressure bonded to open second；
Position detection unit is set to the side of the supply unit, the specific position for detecting workpiece to be checked；
Wherein, quick connector is provided on the mobile route of support base, the other side of the supply unit is provided with buffering
Component, when the gas nozzle is moved to the inlet of the quick connector, the Buffer Unit is contacted with the supply unit, with
Control the speed that the gas nozzle enters quick connector.
Preferably, the venthole being connected to the vessel is offered on the gasket.
Preferably, the position detection unit includes the first photoelectricity being successively set on the supply unit mobile route
Sensor, the second photoelectric sensor and third photoelectric sensor.
Preferably, the supply unit includes：
Sliding rail is fixed on the pedestal；
Slide unit is movably arranged on the sliding rail, and the slide unit side opposite with the Buffer Unit, which is provided with, to push away
Block, the slide unit side opposite with the position detection unit are provided with bent plate, when workpiece for measurement moves to specific position, institute
Bent plate is stated to contact with the corresponding photoelectric sensor induction；
Support base is fixed on the slide unit, and the first air drain is offered in the support base and is respectively placed in described
Two the second air drains of the first air drain both sides, one end of first air drain are connected with the venthole, the other end and the gas
Mouth is connected, and multiple suction nozzles are arranged at intervals on second air drain.
Preferably, the Buffer Unit includes double-rod cylinder and the buffering being connected with the piston rod of double-rod cylinder peace
Loading board, the buffering mounting plate and the pushing block Intermittent Contact.
Preferably, the first pushing component includes：
Support plate is arranged in the top of the pedestal；
Servo mounting plate is arranged and is provided with a servo motor on the top of the support plate, the servo mounting plate；
U-typed driving plate is arranged between the servo mounting plate and support plate, and is arranged in the driving plate lower end
There are multiple push rods through the support plate；
Connecting plate is connected with the push rod, and the lower end of the connecting plate is equipped with multiple pressure heads；
Wherein, the driving plate is connect with the servo motor transmission, when the servo motor is run, drives the drive
Movable plate, connecting plate and pressure head move up and down.
Preferably, the pressure head includes two the first claws and the second claw being separated from each other, and first claw includes
Multiple press surfaces for pressing the support base or workpiece to be checked, first claw and the second claw have with it is to be checked
The compatible contour structures of workpiece, and between first claw and the second claw be equipped with allow sealing tape by evacuation
Slot.
Preferably, the folding and unfolding component includes：
" mountain " type holder comprising be arranged the between first arm at holder both ends and the second arm and setting in the bracket
Three arms are additionally provided with the directive wheel for interfering the sealing tape stroke on the holder；
Rewinding turntable is set on first arm, and the rewinding turntable actively draws sealing tape by motor driving
And it is wound；
Blowing turntable is movably set on the second arm, and the blowing turntable is fixed in one end of the blowing charging tray equipped with one
Driven fast pulley, the driven fast pulley is driven in the rewinding charging tray by sealing tape, the blowing charging tray it is another
End is equipped with torsion retainer, so that when workpiece to be checked is when receiving air-leakage test, the sealing tape does not stress, the torsion
Holder of trying hard to keep also is connected with one division disk.
Preferably, the second pushing component includes：
Press is set on the third arm；
Briquetting mounting plate is connect with the press, and the briquetting mounting plate is additionally provided with pressure sensor；
Briquetting is connect with the briquetting mounting plate, is used for pressing sealing adhesive tape.
Preferably, the air flue to match with the gas nozzle, and the quick connector upper end are offered in the quick connector
It is provided with the tracheae being connected with air source, the tracheae is also connected to the air flue.
The utility model has the beneficial effects that：The air-tightness detection device of the sealing structure of this case, will be to open sealing
Mode avoids the parts at sealing structure and the gap between sealant becomes after press-down type is changed to sealing tape attaching
It is small, so as to avoid this partial gap leakproofness due to narrowing, it is thinning after get a promotion, and then avoid physical presence sealing
Property not good enough problem product be missed, substantially increase detection success rate and accuracy of detection.
Description of the drawings
Fig. 1 is the axonometric drawing of support base；
Fig. 2 is the sectional view of support base；
Fig. 3 is the structural schematic diagram of supply unit；
Fig. 4 is the structural schematic diagram of supply unit and fixed cell；
Fig. 5 is the structural schematic diagram of pressure head；
Fig. 6 is the structural schematic diagram of quick connector；
Fig. 7 is the structural schematic diagram for sealing unit；
Fig. 8 is the axonometric drawing of the air-tightness detection device of sealing structure；
Fig. 9 is the axonometric drawing at another visual angle of the air-tightness detection device of sealing structure
Specific implementation mode
The following describes the utility model in further detail with reference to the accompanying drawings, the aforementioned and other mesh of the utility model
, feature, aspect and advantage will be apparent, to enable those skilled in the art can be real according to this with reference to specification word
It applies.In the accompanying drawings, for clarity, shape and size can be amplified, and identical attached drawing mark will be used in all figures
Remember to indicate same or analogous component.In the following description, such as center, thickness, height, length, front, back, rear portion,
The words such as the left side, the right, top, bottom, top, lower part are to be based on the orientation or positional relationship shown in the drawings.Particularly, " high
Degree " is equivalent to size from the top to the bottom, and " width " is equivalent to size from left to right, and " depth " is equivalent to be arrived in the past
Size afterwards.These relative terms are to be not intended to for convenience and usually need specifically to be orientated.Be related to attachment,
The term (for example, " connection " and " attachment ") of connection etc. refer to these structures by intermediate structure directly or indirectly to one another fixation or
The relationship of attachment and movable or rigidly attached or relationship, unless otherwise clearly stating.
Referring to Fig.1 shown in -9, the air-tightness detection device of sealing structure comprising：
Pedestal 1；
Supply unit 2 is movably arranged on pedestal 1, for conveying workpiece to be checked back and forth, is provided on supply unit 2
Support base 203 for fixing workpiece to be checked is provided with gasket 2031 on support base 203, the gasket 2031 and work to be checked
A vessel is formed between part, which is opening, and the gas nozzle being connected with the vessel is additionally provided in support base 203
2033；
Fixed cell 3 is set to the top of supply unit 2, and for pressing fixed workpiece to be checked, fixed cell 3 includes
The first pushing component that pressure head 307 and drive ram 307 move up and down；
Seal unit 4, be used to close opening, sealing unit 4 include for folding and unfolding sealing tape folding and unfolding component and
Component is pushed for adhesive tape to be pressure bonded to open second；
Position detection unit 5 is set to the side of supply unit 2, the specific position for detecting workpiece to be checked；
Wherein, quick connector 6 is provided on the mobile route of support base 203, the other side of supply unit 2 is provided with buffering
Component 7, when gas nozzle 2033 is moved to the inlet of quick connector 6, Buffer Unit 7 is contacted with supply unit 2, to control gas nozzle
2033 enter the speed of quick connector 6.
Wherein, the venthole 2033 being connected to vessel is offered on gasket 2031.
Wherein, position detection unit 5 includes the first photoelectric sensor being successively set on supply unit mobile route
501, the second photoelectric sensor 502 and third photoelectric sensor 503.
Wherein, supply unit 2 includes：
Sliding rail 201 is fixed on pedestal 1；
Slide unit 202 is movably arranged on sliding rail 201, and the side opposite with Buffer Unit 7 of slide unit 202 is provided with pushing block
205, the side opposite with position detection unit 5 of slide unit 202 is provided with bent plate 204, curved when workpiece for measurement moves to specific position
Plate 204 is contacted with the induction of corresponding photoelectric sensor；
Support base 203 is fixed on slide unit 202, and the first air drain 2034 is offered in support base 203 and is respectively placed in
Two the second air drains 2035 of 2034 both sides of the first air drain, one end of the first air drain 2034 are connected with venthole 2030, the other end
It is connected with gas nozzle 2033, multiple suction nozzles 2032 is arranged at intervals on the second air drain 2035.
Wherein, Buffer Unit 5 includes double-rod cylinder 501 and the buffering being connected with the piston rod 502 of double-rod cylinder 501 peace
Loading board 503, buffering mounting plate 503 and 205 Intermittent Contact of pushing block.
Wherein, the first pushing component includes：
Support plate 301 is arranged in the top of pedestal 1；
Servo mounting plate 302 is arranged on the top of support plate 301, servo mounting plate 302 and is provided with a servo motor
303；
U-typed driving plate 304 is arranged between servo mounting plate 302 and support plate 301, and in 304 lower end of driving plate
It is provided with multiple push rods 305 through support plate 301；
Connecting plate 306 is connected with push rod 305, and the lower end of connecting plate 306 is equipped with multiple pressure heads 307；
Wherein, driving plate 304 is sequentially connected with servo motor 303, when servo motor 303 is run, drives driving plate
304, connecting plate 306 and pressure head 307 move up and down.
Wherein, pressure head 307 includes two the first claws 3072 and the second claw 3071 being separated from each other, the first claw 3072
Contain multiple press surfaces for pressing support base 203 or workpiece to be checked, the first claw 3072 and the second claw 3071 tool
There are a contour structures compatible with workpiece to be checked, and is equipped between the first claw 3072 and the second claw 3071 and to allow sealing tape
By escape groove 3073.
Wherein, folding and unfolding component includes：
" mountain " type holder 401 comprising be arranged in first arm 4012 at 401 both ends of holder and the second arm 4011 and setting
Third arm 4013 among holder 401 is additionally provided with the directive wheel for interfering the sealing tape stroke on holder 401
402；
Rewinding turntable 408 is set on the first arm 4012, and rewinding turntable 408 drives actively traction to seal by motor 409
Adhesive tape 403 simultaneously winds it；
Blowing turntable 410 is movably set on the second arm 4011, and one end of blowing charging tray 410 is fixed this equipped with one and put
Expect that the driven fast pulley 411 of turntable 410, driven fast pulley 411 are driven in rewinding charging tray 408, blowing charging tray by sealing tape
410 other end is equipped with torsion retainer 412, so that when workpiece to be checked is when receiving air-leakage test, sealing tape 403 is not
Stress, torsion retainer 412 are also connected with one division disk 413.
Wherein, the second pushing component includes：
Press 407 is set on third arm 4013；
Briquetting mounting plate 404 is connect with press 407, and briquetting mounting plate 404 is additionally provided with pressure sensor 406；
Briquetting 405 is connect with briquetting mounting plate 404, is used for pressing sealing adhesive tape.
Wherein, the air flue 601 to match with the gas nozzle is offered in quick connector 6, and 6 upper end of the quick connector is set
It is equipped with the tracheae 602 being connected with air source, tracheae 602 is also connected to air flue 601.
The course of work of air-tightness detection device is as follows：
1) by clamping workpiece to be checked on support base 203, slide unit 202 drives workpiece to be checked to move, when gas nozzle 2033 moves
When to quick connector 6, pushing block 205 contacts, at the same time, bent plate 204 and the second photoelectric sensor with buffering mounting plate 703
502 induction contacts, the second photoelectric sensor 502 send out signal, and double-rod cylinder 701 is run so that the movement speed of gas nozzle 2033
Slow down, when gas nozzle 2033 is fully inserted into quick connector 6, bent plate 204 is contacted with the induction of third photoelectric sensor 503, third light
Electric transducer 503 sends out signal, and double-rod cylinder 701 is out of service and slide unit 202 stops movement；
2) servo motor 303 operates drive ram 307 and presses workpiece to be checked, and workpiece to be checked is made to fix, and press 407 drives
Briquetting 405 pushes sealing tape 403, preferably controls down force pressure by pressure sensor 406, and sealing tape 403 is made to be bonded
In the precalculated position of workpiece to be checked, then controls press 407 and 405 uplink of briquetting is driven to reset, sealing tape 403 is in pine at this time
Relaxation state, due to the effect of torsion retainer 412, after motor 409 stops, torsion retainer 412 can drive blowing turntable 410
Certain angle is turned round, the relaxed state not stressed to make sealing tape 403 be in, it is therefore an objective to sealing tape 403 be made to stablize patch
It, will not be when carrying out air-leakage test, because pulling force causes sealing tape 403 to loosen, with this together in the precalculated position of workpiece to be checked
Vessel becomes the confined space that is isolated from the outside world simultaneously, air source constantly by quick connector 6 into vessel air-breathing or pumping with
Carry out air-leakage test；
3) after air-leakage test, briquetting 405 moves up, and control motor 409 drives rewinding turntable 408 to rotate, to lead
Draw sealing tape 403 and disengage it from workpiece to be checked, comes back to tensioned state；According to the good sealing compound of the specifications design of workpiece to be checked
403 trailed stroke distances of band, to meet the fitting requirement of next workpiece to be checked；In combination with index dial 413 to sealing compound
Accurate measurement and positioning are carried out with 403 stroke, and 303 drive ram of servo motor, 307 uplink retracts；
4) slide unit 202 is returned moves to blowing area, when workpiece to be checked is moved to blowing area, bent plate 204 and the first photoelectricity
The induction contact of sensor 501, the first photoelectric sensor 501 send out signal, and slide unit 202 stops movement, the workpiece that detection is completed
It removes, again the new workpiece to be checked of clamping, repeats step 1).
The air-tightness detection device of the sealing structure of the utility model will be changed to seal to open sealing means from press-down type
After chewing-gum band attaches, avoids the parts at sealing structure and the gap between sealant becomes smaller, so as to avoid this part
The leakproofness in gap due to narrowing, it is thinning after get a promotion, and then avoid the product quilt of the not good enough problem of physical presence leakproofness
Missing inspection substantially increases detection success rate and accuracy of detection.
It is not only in the description and the implementation although the embodiments of the present invention have been disclosed as above
Listed utilization, it can be applied to various fields suitable for the present invention completely, for those skilled in the art,
Other modifications may be easily implemented, therefore without departing from the general concept defined in the claims and the equivalent scope, this reality
It is not limited to specific details with novel.
Claims (10)
1. a kind of air-tightness detection device of sealing structure, which is characterized in that including：
Pedestal；
Supply unit is movably arranged on the pedestal, for conveying workpiece to be checked back and forth, is provided on the supply unit
Support base for fixing workpiece to be checked is provided with gasket on the support base, is formed between the gasket and workpiece to be checked
One vessel, which is opening, and the gas nozzle being connected with the vessel is additionally provided in the support base；
Fixed cell is set to the top of the supply unit, and for pressing fixed workpiece to be checked, the fixed cell includes
The first pushing component that pressure head and the driving pressure head move up and down；
Seal unit, be used to close the opening, the sealing unit include for folding and unfolding sealing tape folding and unfolding component with
And push component for sealing tape to be pressure bonded to open second；
Position detection unit is set to the side of the supply unit, the specific position for detecting workpiece to be checked；
Wherein, quick connector is provided on the mobile route of support base, the other side of the supply unit is provided with Buffer Unit,
When the gas nozzle is moved to the inlet of the quick connector, the Buffer Unit is contacted with the supply unit, with control
The gas nozzle enters the speed of quick connector.
2. the air-tightness detection device of sealing structure as described in claim 1, which is characterized in that offered on the gasket
The venthole being connected to the vessel.
3. the air-tightness detection device of sealing structure as claimed in claim 2, which is characterized in that the position detection unit packet
Include the first photoelectric sensor, the second photoelectric sensor and third photoelectric transfer being successively set on the supply unit mobile route
Sensor.
4. the air-tightness detection device of sealing structure as claimed in claim 3, which is characterized in that the supply unit includes：
Sliding rail is fixed on the pedestal；
Slide unit is movably arranged on the sliding rail, and the slide unit side opposite with the Buffer Unit is provided with pushing block, institute
It states the slide unit side opposite with the position detection unit and is provided with bent plate, it is described curved when workpiece for measurement moves to specific position
Plate is contacted with the corresponding photoelectric sensor induction；
Support base is fixed on the slide unit, and the first air drain is offered in the support base and is respectively placed in described first
Two the second air drains of air drain both sides, one end of first air drain are connected with the venthole, the other end and the gas nozzle phase
Even, multiple suction nozzles are arranged at intervals on second air drain.
5. the air-tightness detection device of sealing structure as claimed in claim 4, which is characterized in that the Buffer Unit includes double
Bar cylinder and the buffering mounting plate being connected with the piston rod of the double-rod cylinder, the buffering mounting plate and pushing block interval
Contact.
6. the air-tightness detection device of sealing structure as described in claim 1, which is characterized in that described first pushes component packet
It includes：
Support plate is arranged in the top of the pedestal；
Servo mounting plate is arranged and is provided with a servo motor on the top of the support plate, the servo mounting plate；
U-typed driving plate is arranged between the servo mounting plate and support plate, and is provided in the driving plate lower end more
A push rod through the support plate；
Connecting plate is connected with the push rod, and the lower end of the connecting plate is equipped with multiple pressure heads；
Wherein, the driving plate is connect with the servo motor transmission, when the servo motor is run, drives the driving
Plate, connecting plate and pressure head move up and down.
7. the air-tightness detection device of sealing structure as claimed in claim 6, which is characterized in that the pressure head includes two phases
The first claw and the second claw mutually detached, first claw contain multiple for pressing the support base or work to be checked
The press surface of part, first claw and the second claw have contour structures compatible with workpiece to be checked, and described first
Between claw and the second claw be equipped with allow sealing tape by escape groove.
8. the air-tightness detection device of sealing structure as described in claim 1, which is characterized in that the folding and unfolding component includes：
" mountain " type holder comprising the third between first arm at holder both ends and the second arm and setting in the bracket is set
Arm is additionally provided with the directive wheel for interfering the sealing tape stroke on the holder；
Rewinding turntable is set on first arm, and the rewinding turntable actively draws sealing tape and right by motor driving
It is wound；
Blowing turntable is movably set on the second arm, and one end of the blowing charging tray, which is equipped with, fixes the driven of the blowing turntable
Fast pulley, the driven fast pulley are driven in the rewinding charging tray by sealing tape, and the other end of the blowing charging tray is equipped with
Torsion retainer, so that when workpiece to be checked is when receiving air-leakage test, the sealing tape does not stress, and the torsion is kept
Device is also connected with one division disk.
9. the air-tightness detection device of sealing structure as claimed in claim 8, which is characterized in that described second pushes component packet
It includes：
Press is set on the third arm；
Briquetting mounting plate is connect with the press, and the briquetting mounting plate is additionally provided with pressure sensor；
Briquetting is connect with the briquetting mounting plate, is used for pressing sealing adhesive tape.
10. the air-tightness detection device of sealing structure as described in claim 1, which is characterized in that opened in the quick connector
Equipped with the air flue to match with the gas nozzle, and the quick connector upper end is provided with the tracheae being connected with air source, the tracheae
Also it is connected to the air flue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721598724.6U CN207964202U (en) | 2017-11-24 | 2017-11-24 | A kind of air-tightness detection device of sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721598724.6U CN207964202U (en) | 2017-11-24 | 2017-11-24 | A kind of air-tightness detection device of sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207964202U true CN207964202U (en) | 2018-10-12 |
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ID=63724759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721598724.6U Active CN207964202U (en) | 2017-11-24 | 2017-11-24 | A kind of air-tightness detection device of sealing structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107764489A (en) * | 2017-11-24 | 2018-03-06 | 苏州富强科技有限公司 | A kind of air-tightness detection device of sealing structure |
| CN109470414A (en) * | 2018-12-30 | 2019-03-15 | 苏州富强科技有限公司 | A kind of sealer mechanism for air-leakage test |
| CN112763489A (en) * | 2021-01-05 | 2021-05-07 | 深圳市凤舞科技有限公司 | Machining of mechanical seal spare is with gap detection device that can multi-angle upset |
| CN115014967A (en) * | 2022-08-03 | 2022-09-06 | 常州荣瑞硅胶制品有限公司 | Device and method for detecting silica gel ring for sealing |
| CN117288400A (en) * | 2023-11-27 | 2023-12-26 | 昆山众泰兴自动化设备有限公司 | Panel air tightness detection equipment and working method thereof |
-
2017
- 2017-11-24 CN CN201721598724.6U patent/CN207964202U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107764489A (en) * | 2017-11-24 | 2018-03-06 | 苏州富强科技有限公司 | A kind of air-tightness detection device of sealing structure |
| CN107764489B (en) * | 2017-11-24 | 2024-05-03 | 苏州富强科技有限公司 | Air tightness detection device of sealing structure |
| CN109470414A (en) * | 2018-12-30 | 2019-03-15 | 苏州富强科技有限公司 | A kind of sealer mechanism for air-leakage test |
| CN112763489A (en) * | 2021-01-05 | 2021-05-07 | 深圳市凤舞科技有限公司 | Machining of mechanical seal spare is with gap detection device that can multi-angle upset |
| CN115014967A (en) * | 2022-08-03 | 2022-09-06 | 常州荣瑞硅胶制品有限公司 | Device and method for detecting silica gel ring for sealing |
| CN117288400A (en) * | 2023-11-27 | 2023-12-26 | 昆山众泰兴自动化设备有限公司 | Panel air tightness detection equipment and working method thereof |
| CN117288400B (en) * | 2023-11-27 | 2024-01-26 | 昆山众泰兴自动化设备有限公司 | Panel air tightness detection equipment and working method thereof |
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