CN209806186U - circuit board rolling device - Google Patents
circuit board rolling device Download PDFInfo
- Publication number
- CN209806186U CN209806186U CN201920054895.5U CN201920054895U CN209806186U CN 209806186 U CN209806186 U CN 209806186U CN 201920054895 U CN201920054895 U CN 201920054895U CN 209806186 U CN209806186 U CN 209806186U
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- Prior art keywords
- roller
- scraper
- ink
- upper roller
- conveying track
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- 238000005096 rolling process Methods 0.000 title claims abstract description 56
- 238000007790 scraping Methods 0.000 claims abstract description 12
- 239000012790 adhesive layer Substances 0.000 claims description 21
- 238000007639 printing Methods 0.000 abstract description 9
- 239000003292 glue Substances 0.000 abstract description 2
- 238000004026 adhesive bonding Methods 0.000 abstract 1
- 229920003023 plastic Polymers 0.000 description 9
- 239000002985 plastic film Substances 0.000 description 9
- 238000002360 preparation method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- 238000003825 pressing Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- Coating Apparatus (AREA)
Abstract
The utility model provides a circuit board rolling device, which comprises a conveying track, a rolling component, an upper ink removing device and a lower ink removing device, wherein the rolling component comprises an upper roller and a lower roller which are respectively arranged at the upper side and the lower side of the conveying track; the upper ink removing device comprises an upper scraper and an upper bearing disc, the upper scraper is attached to the upper roller and can be used for scraping the ink attached to the upper roller and enabling the ink to fall into the upper bearing disc downwards, and the lower ink removing device comprises a lower scraper and a lower bearing disc which are arranged symmetrically to the upper ink removing device; the utility model discloses a be provided with scraper from top to bottom, consequently after the printing ink on the upper and lower gyro wheel is struck off, the gyro wheel alright be used for again being stained with and glue printing ink, save the printing ink that uses the disposable from this and be stained with the necessity of gluing the utensil.
Description
Technical Field
the present invention relates to a circuit board processing apparatus, and more particularly to a device for pressing and removing excessive solder paste on a circuit board.
background
In the field of processing of circuit boards, how to remove the redundant solder resist ink on the circuit board is an important technology; the redundant solder mask ink is ink which is coated on the periphery of a plug hole on the circuit board and is used for preventing short circuit; the ink is easy to plug the hole and the convex ink is easy to be plugged in the manufacturing process, the ink is easy to seep out from two sides of the plug hole, and arc-shaped convex points are formed at the end part of the plug hole, and the convex points are processing flaws which need to be rolled and removed in the processing process of the circuit board.
Referring to fig. 8, a prior art circuit board leveling device feeds a circuit board 91 between two rollers 92 arranged at an interval up and down by a conveyor belt (not shown); a transparent plastic film 93 is further disposed between the two rollers 92, and when the rollers 92 rotate, the transparent plastic films 93 also move along the rolling direction of the rollers 92.
when the circuit board 91 enters between the two rollers 92, the two side surfaces thereof are simultaneously attached by the transparent plastic film 93 and further pressed by the two rollers 92, so that the transparent plastic film 93 is also attached to the surface of the circuit board 91 when the rollers 92 press the circuit board 91, and at the same time, the transparent plastic film 93 can stick the ink 94 on the surface of the circuit board.
Then, when the circuit board 91 is continuously pushed by the rollers 92 to leave the two rollers 92, the transparent plastic film 93 is separated from the circuit board 91, and the excess ink 94 is carried away from the circuit board 91, thereby achieving the purpose of removing the excess ink 94 on the surface of the circuit board 91.
however, the leveling device for circuit board in the prior art relies on the disposable transparent plastic film to take the excess ink away from the circuit board, so the cost of the consumables is very large, and the use of the transparent plastic film has negative impact on the environment, so the leveling device in the prior art has its disadvantages.
SUMMERY OF THE UTILITY MODEL
In view of the disadvantages and shortcomings of the prior art, the present invention provides a circuit board rolling device and a circuit board rolling method, which achieve the purpose of scraping off ink by an upper scraper and a lower scraper, so as to avoid using a consumable transparent plastic film, thereby achieving the purpose of saving cost and protecting environment.
to achieve the above-mentioned creation purpose, the present invention adopts a technical means of a circuit board rolling device, which comprises:
A conveying track extending along a conveying direction, and two opposite ends of the conveying track along the conveying direction are respectively a front end and a rear end;
A roll-flat assembly, comprising:
The upper roller rolling device is arranged above the conveying track;
an upper roller connected with the upper roller rolling device and driven by the upper roller rolling device to rotate relative to the conveying track;
A lower roller rolling device arranged below the conveying track;
A lower roller connected with the lower roller rolling device and driven by the lower roller rolling device to rotate relative to the conveying track, and the position of the lower roller corresponds to that of the upper roller;
an upper ink removing device adjacent to the upper roller and comprising:
An upper scraper selectively attached to the upper roller for scraping off ink adhered to the upper roller;
The upper bearing disc is arranged below the upper scraper and can be used for bearing the ink scraped by the upper scraper;
A lower ink removal device adjacent to the lower roller and comprising:
a lower scraper which is selectively attached to the lower roller and can be used for scraping the ink attached to the lower roller;
and the lower bearing disc is arranged below the lower scraper and can be used for bearing the ink scraped by the lower scraper.
to achieve the above-mentioned creation purpose, the present invention adopts a technical means of a circuit board rolling device, which comprises:
A conveying track extending along a conveying direction, and two opposite ends of the conveying track are respectively a front end and a rear end;
A roll-flat device, comprising:
The upper roller rolling device is arranged above the conveying track;
An upper roller connected with the upper roller rolling device and driven by the upper roller rolling device to rotate relative to the conveying track;
A lower roller rolling device arranged below the conveying track;
A lower roller connected with the lower roller rolling device and driven by the lower roller rolling device to rotate relative to the conveying track, and the position of the lower roller corresponds to that of the upper roller;
An ink removing device adjacent to the upper roller or the lower roller, the ink removing device comprising:
a scraper which is selectively attached to the upper roller or the lower roller and can be used for scraping the ink attached to the upper roller or the lower roller;
And the bearing disc is arranged below the scraper and can be used for bearing the ink scraped by the scraper.
The utility model has the advantages that by arranging the upper ink removing device and the lower ink removing device, after the upper roller and the lower roller press the circuit board and further stick the ink on the circuit board to the upper roller and the lower roller, under the continuous rotation, the upper scraper and the lower scraper which are respectively contacted with the upper roller and the lower roller can further scrape the ink stuck to the upper roller and the lower roller, and the scraped ink can fall into the receiving disc arranged below the two scrapers; in other words, the upper roller and the lower roller of the ink scraped by the upper scraper and the lower scraper respectively can continuously rotate; the utility model discloses an aforementioned processing structure and method make whole processing procedure of cleaing away circuit board printing ink need not use any abandonment formula and be stained with the material that glues, saves the processing cost of whole printing ink clearance process from this.
furthermore, in the above circuit board rolling device, the rolling component further includes a moving power device connected to the upper roller and driving the upper roller to move up and down relative to the conveying track.
Further, in the aforementioned circuit board rolling device, the moving power device is an air cylinder.
further, in the above circuit board roll-leveling device, a position where the upper scraper of the upper ink removing device abuts against the upper roller is between a bottommost end of the upper roller and a frontmost end of the upper roller along the conveying direction.
further, in the above circuit board rolling device, a position where the lower scraper of the lower ink removing device abuts against the lower roller is between a bottom end of the lower roller and a last end of the lower roller along the conveying direction.
further, in the above mentioned circuit board rolling device, an adhesive layer is disposed on the upper tray for receiving the ink scraped by the upper scraper.
Furthermore, the above mentioned circuit board rolling device, wherein the upper ink removing device further comprises an upper scraper power device connected to the upper scraper, and the upper scraper power device can drive the upper scraper to move relative to the upper roller, so that the upper scraper is close to or away from the upper roller.
Drawings
Fig. 1 is a perspective view of the present invention.
Fig. 2 is a perspective view of the rolling device, the upper ink removing device and the lower ink removing device of the present invention.
Fig. 3 is a partially exploded view of the components of fig. 2.
Fig. 4 is a sectional view of the present invention and a circuit board in use.
fig. 5 is an enlarged view of a portion a of fig. 4.
Fig. 6 is a schematic diagram of the operation of adjusting the height of the upper roller according to the present invention.
Fig. 7 is a schematic diagram of the operation of changing the upper and lower rollers and adjusting the positions of the upper and lower scrapers according to the present invention.
Figure 8 is a schematic diagram of a prior art circuit board flattening apparatus.
Detailed Description
The technical features of the present invention adopted to achieve the predetermined creation objectives will be further described below with reference to the accompanying drawings and preferred embodiments of the present invention.
Referring to fig. 1, the circuit board rolling device of the present invention includes a conveying track 10, a rolling assembly 20 and at least one ink removing device.
The conveying track 10 extends along a conveying direction L, and opposite ends of the conveying track along the conveying direction L are a front end 11 and a rear end 12, respectively.
Referring to fig. 1 and 2, the rolling assembly 20 includes an upper roller 21, a lower roller 22, a moving power device 23, an upper roller rolling device 24 and a lower roller rolling device 25, the upper roller 21 and the upper roller rolling device 24 are disposed above the conveying track 10, the upper roller rolling device 24 can drive the upper roller 21 to rotate relative to the conveying track 10, the lower roller 22 and the lower roller rolling device 25 are arranged below the conveying track 10, the lower roller rolling device 25 can drive the lower roller 22 to rotate relative to the conveying track 10, and in the main embodiment, the positions of the upper roller 21 and the lower roller 22 correspond up and down, during operation, the upper roller 21 and the lower roller 22 rotate in opposite directions relative to the conveying track 10, so that the object interposed between the upper roller 21 and the lower roller 22 is pushed toward the front end 11 of the conveying track 10 in the conveying direction L.
On the other hand, in the present embodiment, the upper roller rolling device 24 and the lower roller rolling device 25 are respectively a motor, but it is not limited thereto, and in other embodiments, the upper roller rolling device 24 and the lower roller rolling device 25 may also be other power devices.
In the present embodiment, the surface materials of the upper roller 21 and the lower roller 22 are rubber, and the rubber material can be used for adhering ink on the circuit board, but the surface materials of the upper roller 21 and the lower roller 22 are not limited to rubber.
Referring to fig. 1 and 6, the moving power device 23 is connected to the upper roller 21 and can drive the upper roller 21 to move up and down relative to the conveying track 10.
Referring to fig. 2 and 3, in the main embodiment, the number of the at least one ink removing device is two, and the at least one ink removing device can be further divided into an upper ink removing device 30 and a lower ink removing device 40, but not limited thereto, and in other embodiments, only a single ink removing device can be provided.
The upper ink removal device 30 is adjacent to the upper roller 21 and includes an upper doctor blade 31, an upper support plate 32, an adhesive layer 33, and an upper doctor blade power unit 34.
Referring to fig. 1, fig. 2 and fig. 3, the upper scraper 31 selectively abuts against the upper roller 21 and is used for scraping off ink adhered to the upper roller 21, in the present main embodiment, the position of the upper scraper 31 abutting against the upper roller 21 is between the bottom end of the upper roller 21 and the front end of the upper roller 21 along the conveying direction L, in other words, the position of the upper scraper 31 is in a quarter circle of the upper roller near the front end 11 and near the lower side, and in the present main embodiment, the upper scraper 31 is disposed at the front end of the upper roller 21 along the conveying direction L, but the position is not limited thereto.
Referring to fig. 4, the upper tray 32 is disposed under the upper scraper 31 and is used for receiving the ink scraped by the upper scraper 31, and in the main embodiment, the adhesive layer 33 is disposed in the upper tray 32, and after the ink is scraped by the upper scraper 31, the ink falls into the upper tray 32 and is adhered and fixed by the adhesive layer 33, but in other embodiments, the upper tray 32 may also have no adhesive layer 33.
In the present embodiment, the adhesive layer 33 is a PVC film, but it is not limited thereto, and in other embodiments, the adhesive layer 33 may be made of other materials as long as it has adhesiveness.
Referring to fig. 3 and 5, the upper blade power device 34 is connected to the upper blade 31, and the upper blade power device 34 can drive the upper blade 31 to move relative to the upper roller 21 and make the upper blade 31 abut against or move away from the upper roller 21, but in other embodiments, the upper blade power device 34 may not be provided, and in some embodiments, the upper blade 31 can be manually adjusted to the relative position with respect to the upper roller 21.
referring to fig. 2 and 3, the lower ink removing device 40 is adjacent to the lower roller 22 and includes a lower scraper 41, a lower tray 42, an adhesive layer 43 and a lower scraper power device 44.
referring to fig. 4, the lower blade 41 selectively contacts the lower roller 22 and is used to scrape off ink adhered to the lower roller 22. in the main embodiment, the position where the lower blade 41 contacts the lower roller 22 is between the bottom end of the lower roller 22 and the rearmost end of the lower roller 22 along the conveying direction L, in other words, the position of the lower blade 41 is in a quarter circle of the lower roller close to the rear end 12 and near the lower side, and in the main embodiment, the lower blade 41 is disposed in the middle of the quarter circle of the lower roller 22, but the position is not limited thereto.
the lower tray 42 is disposed below the lower scraper 41 and is used for receiving the ink scraped by the lower scraper 41, and in the main embodiment, the adhesive layer 43 of the lower ink removing device 40 is disposed in the lower tray 42, and after the lower scraper 41 scrapes the ink, the ink falls into the lower tray 42 and is adhered and fixed by the adhesive layer 43, but in other embodiments, the lower tray 42 may not have the adhesive layer 43.
In the present embodiment, the adhesive layer 43 is a PVC film, but it is not limited thereto, and in other embodiments, the adhesive layer 43 may be made of other materials as long as it has adhesiveness.
The lower blade power device 44 is connected to the lower blade 41, and the lower blade power device 44 can drive the lower blade 41 to move relative to the lower roller 22 and make the lower blade 41 abut against or move away from the lower roller 22, but in other embodiments, the lower blade power device 44 is not needed, and in these embodiments, the lower blade 41 can be manually adjusted relative to the lower roller 22.
In another embodiment of the present invention, it is substantially the same as the main embodiment of the present invention, but the other embodiment has only one ink removing device, and the ink removing device can be adjacent to the upper roller or the lower roller according to the user's requirement, and the ink removing device includes a scraper and a receiving tray, the structure and function of the scraper and the receiving tray are the same as the upper scraper 31 and the upper receiving tray 32 of the main embodiment, and the scraper can be attached to the upper roller or the lower roller according to the user's requirement, and the receiving tray is disposed under the scraper.
Referring to fig. 7, in another embodiment of the present invention, a user can also replace the upper roller 21A and the lower roller 22A with different sizes to correspond to circuit boards 91A with different sizes, and in this further embodiment, since the sizes of the upper roller 21A and the lower roller 22A are changed, the distances between the upper scraper 31A and the lower scraper 41A and the upper roller 21A and the lower roller 22A should be correspondingly adjusted, so that the upper scraper 31A and the lower scraper 41A and the rollers 21A and 22A are maintained at the optimal scraping positions.
the method of using the circuit board roll-leveling device is as follows.
the utility model discloses a main embodiment is when using, will be two sets the utility model discloses merge the use to improve the efficiency that printing ink was clear away, however, because two sets of the utility model discloses need not have two sets of independent delivery track 10, consequently in this main embodiment, this is two sets of the utility model discloses a sharing a set of delivery track 10.
the method for using the circuit board comprises a preparation step, a pressing step and a scraping step, and the details of each step are described in sequence.
the preparation method comprises the following steps: referring to fig. 1 and 4, a conveying rail 10, an upper roller 21, a lower roller 22, an upper scraper 31 and a lower scraper 41 are prepared, the upper roller 21 and the lower roller 22 are respectively disposed above and below the conveying rail 10, and the upper scraper 31 and the lower scraper 41 are respectively disposed above and below the conveying rail 10; all components in the preparation step are the same as the related structures mentioned in the circuit board rolling device of the present invention, and therefore, the description thereof is omitted, but the components in the preparation step are not limited to be completely the same as those of the circuit board rolling device.
as shown in fig. 6, in the preparation step, the user can move the upper roller 21 up and down according to the thickness of the circuit board 91 to be processed, so as to adjust the distance between the circuit board 91 and the upper roller 21 and the lower roller 22.
more precisely, the preparation step may further include an upper tray 32 and a lower tray 42, the upper tray 32 is provided with an adhesive layer 33, and the lower tray 42 is provided with an adhesive layer 43, the trays 32, 42 and the adhesive layers 33, 43 of the preparation step are respectively the same as the related structures mentioned in the circuit board roll-flat device, and therefore, the description thereof is omitted.
and (3) laminating: referring to fig. 1, 4 and 5, a circuit board 91 is disposed on the conveying track 10, and the circuit board 91 is driven by the conveying track 10 to move between the upper roller 21 and the lower roller 22 along the conveying direction L; after the circuit board 91 moves between the upper roller 21 and the lower roller 22, since the upper roller 21 and the lower roller 22 rotate in opposite directions, the circuit board 91 can be pressed and pushed forward along the conveying direction L.
After the circuit board 91 is pressed by the upper roller 21 and the lower roller 22, the excess ink 94 on the circuit board 91 adheres to the upper roller 21 and the lower roller 22, and more precisely, since the upper roller 21 and the lower roller 22 are made of rubber with slight elasticity, the ink 94 adheres to the upper roller 21 and the lower roller 22 due to the pressure when the circuit board 91 is slightly pressed.
Scraping: referring to fig. 5 and 6, the upper roller 21 and the lower roller 22 adhered with the ink 94 rotate continuously and abut against the upper scraper 31 and the lower scraper 41, respectively, and when the upper scraper 31 and the lower scraper 41 abut against the two rollers 21 and 22 continuously, the area of the upper roller 21 and the lower roller 22 adhered with the ink 94 gradually approaches the upper scraper 31 and the lower scraper 41, and is further scraped by the upper scraper 31 and the lower scraper 41, so that the ink 94 is scraped by the upper scraper 31 and the lower scraper 41.
More precisely, since the adhesive layers 33, 43 are disposed on the upper tray 32 and the lower tray 42 respectively in the preparation step, the scraped ink 94 will be adhered by the adhesive layers 33, 43 after falling to the corresponding upper tray 32 or lower tray 42, so that the ink 94 will not be scattered randomly.
When the adhesive layers 33, 43 are stuck with excessive ink 94, the user can also change the adhesive layers 33, 43 to maintain the adhesion.
the advantages of the utility model are as follows.
When the utility model is used, as the disposable material is not needed in the step of adhering the printing ink 94, the printing ink can be directly adhered through the upper roller 21 and the lower roller 22, and then the printing ink is scraped off from the upper roller 21 and the lower roller 31 through the operation of the upper scraper 31 and the lower scraper 41; in other words, the upper roller 21 and the lower roller 22 after the ink 94 is scraped off can continue to be used as the tool for adhering the ink 94 under the continuous rotation, so the utility model discloses can unnecessarily utilize the disposable ink to be adhered to the equipment to usable roller itself reaches the purpose of repeatedly adhering the ink, therefore can effectively reduce the utility model discloses cost in the use.
the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, it is not intended to limit the present invention, and any person skilled in the art can make some changes or modifications as equivalent embodiments without departing from the technical scope of the present invention, but all simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (8)
1. A circuit board roll-off device, comprising:
a conveying track extending along a conveying direction, and two opposite ends of the conveying track along the conveying direction are respectively a front end and a rear end;
a roll-flat assembly, comprising:
the upper roller rolling device is arranged above the conveying track;
The upper roller is connected with the upper roller rolling device and can be driven by the upper roller rolling device to rotate relative to the conveying track;
a lower roller rolling device arranged below the conveying track;
a lower roller connected with the lower roller rolling device and driven by the lower roller rolling device to rotate relative to the conveying track, and the position of the lower roller corresponds to that of the upper roller;
An upper ink removing device adjacent to the upper roller and comprising:
an upper scraper selectively attached to the upper roller and capable of scraping off ink adhered to the upper roller;
The upper bearing disc is arranged below the upper scraper and can be used for bearing the ink scraped by the upper scraper;
A lower ink removal device adjacent to the lower roller and comprising:
A lower scraper which is selectively attached to the lower roller and can be used for scraping the ink attached to the lower roller;
And the lower bearing disc is arranged below the lower scraper and can be used for bearing the ink scraped by the lower scraper.
2. the apparatus of claim 1, wherein the roll-off assembly further comprises a moving power device coupled to the upper roller and capable of driving the upper roller to move up and down relative to the conveying track.
3. The apparatus of claim 2, wherein the moving power device is a pneumatic cylinder.
4. the apparatus according to any one of claims 1 to 3, wherein the upper scraper of the upper ink removing device abuts against the upper roller between a lowermost end of the upper roller and a foremost end of the upper roller in the conveying direction.
5. The apparatus according to any one of claims 1 to 3, wherein the lower scraper of the lower ink removing device abuts against the lower roller between a lowermost end of the lower roller and a rearmost end of the lower roller in the conveying direction.
6. The apparatus according to any one of claims 1 to 3, wherein the upper tray is provided with an adhesive layer for receiving the ink scraped off by the upper blade.
7. The circuit board roll-flat device of any one of claims 1 to 3,
the upper ink removing device further comprises an upper scraper power device which is connected with the upper scraper, and the upper scraper power device can drive the upper scraper to move relative to the upper roller so that the upper scraper is attached to or away from the upper roller.
8. a circuit board roll-off device, comprising:
a conveying track extending along a conveying direction, and two opposite ends of the conveying track are respectively a front end and a rear end;
A roll-flat device, comprising:
The upper roller rolling device is arranged above the conveying track;
the upper roller is connected with the upper roller rolling device and can be driven by the upper roller rolling device to rotate relative to the conveying track;
A lower roller rolling device arranged below the conveying track;
A lower roller connected with the lower roller rolling device and driven by the lower roller rolling device to rotate relative to the conveying track, and the position of the lower roller corresponds to that of the upper roller;
An ink removing device adjacent to the upper roller or the lower roller, the ink removing device comprising:
A scraper which is selectively attached to the upper roller or the lower roller and can be used for scraping the ink attached to the upper roller or the lower roller;
And the bearing disc is arranged below the scraper and can be used for bearing the ink scraped by the scraper.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW108200441U TWM578061U (en) | 2019-01-10 | 2019-01-10 | Circuit board rolling and flattening device |
| TW108200441 | 2019-01-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209806186U true CN209806186U (en) | 2019-12-17 |
Family
ID=67353269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920054895.5U Active CN209806186U (en) | 2019-01-10 | 2019-01-14 | circuit board rolling device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN209806186U (en) |
| TW (1) | TWM578061U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111432570A (en) * | 2019-01-10 | 2020-07-17 | 群翊工业股份有限公司 | Circuit board rolling device and using method thereof |
-
2019
- 2019-01-10 TW TW108200441U patent/TWM578061U/en unknown
- 2019-01-14 CN CN201920054895.5U patent/CN209806186U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111432570A (en) * | 2019-01-10 | 2020-07-17 | 群翊工业股份有限公司 | Circuit board rolling device and using method thereof |
| CN111432570B (en) * | 2019-01-10 | 2023-01-24 | 群翊工业股份有限公司 | Circuit board rolling device and using method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| TWM578061U (en) | 2019-05-11 |
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