CN102179383A - Hole slag cleaning device for PCB (printed circuit board) - Google Patents
Hole slag cleaning device for PCB (printed circuit board) Download PDFInfo
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- CN102179383A CN102179383A CN 201110043414 CN201110043414A CN102179383A CN 102179383 A CN102179383 A CN 102179383A CN 201110043414 CN201110043414 CN 201110043414 CN 201110043414 A CN201110043414 A CN 201110043414A CN 102179383 A CN102179383 A CN 102179383A
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Abstract
The invention discloses a hole slag cleaning device for a PCB (printed circuit board), which comprises an air chamber, a transmission device and a dedusting device, wherein the dedusting device comprises a fan, an air outlet pipeline and an air inlet pipeline, the input end of the fan is connected with the air inlet pipeline, the air inlet pipeline is provided with an air filtering device, the output end of the fan is connected with the air outlet pipeline, an air nozzle is arranged at an air outlet of the air outlet pipeline, and the air nozzle is dead against the PCB; the air chamber is surrounded by airtight partition boards and provided with a PCB inlet and a PCB outlet, the air chamber is divided into a front chamber and a rear chamber by the plane where the PCB is located, and the air nozzle is positioned in the front chamber; the transmission device comprises a transmission roller for supporting the lower surface of the PCB and a pressure roller pressed on the upper surface of the PCB; and an air inlet of the air inlet pipeline is arranged in the rear chamber, and a dust recovering device is arranged in the rear chamber. Air pressure in the rear chamber is negative pressure relative to an external environment, and dust is less prone to outward leakage; furthermore, the negative pressure environment in the rear chamber can enable the air pressure difference between the upper surface and the lower surface of the PCB to be greater, thereby being conductive to improving the airflow blow washing efficiency.
Description
Technical field
The present invention relates to a kind of PCB industry production equipment, relate in particular to the cleaning equipment of residue in a kind of back cleaning eye of on pcb board spare, holing.
Background technology
PCB (Printed Circuit Board), Chinese is a printed circuit board, claims printed circuit board (PCB), printed substrate again, is the important electron parts, is the supporter of electronic devices and components, is the supplier that electronic devices and components are electrically connected.
In the PCB production process, need hole to it, the hole of brill has plenty of in order to make via so that each layer of copper facing circuit, has plenty of to be used to make locating hole etc.
Pcb board spare 1 is through after the machine drilling, formation pcb board hole 6 has the part copper wire and the PP dust stockpiles in the hole, form the hole slag, the hole slag is mainly various dust 8 (see figure 2)s such as Copper Foil, copper wire, glass fibre and PP powder, stay great quality hidden danger for the plating production and processing of back, as electroplating in no metal, the hole foreign material etc. in copper facing uneven thickness, the hole in the hole.Boring mud appears in a hole to be left over, and will cause entire product to scrap, and the important quality problem during no metal is manufactured as PCB again always in the hole.Though once adopted other method (to be mainly chemical desmearing on the technology, being specially plate allows brill dirt and liquid medicine react in chemical medicinal liquid, through ultrasonic vibration, and then water cleans) solve, but use cost is high, and flow process is numerous and diverse, and product rejection also occupy the prostatitis that PCB manufactures always.
Simultaneously,, can make some products not need to handle, reduce cost and shortening manufacturing cycle in the manufacturing, but effect be not satisfactory through chemical medicinal liquid if use some simple plant equipment to carry out copper ashes removing in the hole.
To this, the someone proposes with high velocity air purge hole, to reach the purpose of cleaning eye slag.For example application (patent) number: 200720054228.4, the Chinese utility model patent of title " a kind of high pressure air knife removes the stopple machine " discloses a kind of high pressure air knife and has removed the stopple machine, comprise body, the substrate delivery wheel is installed in the described body, be provided with high pressure blast chamber in the described body, described substrate delivery wheel runs through this high pressure blast chamber, the indoor high pressure air knife that is equipped with of high pressure blast, the air outlet of high pressure air knife is relative with the substrate delivery wheel, and the high pressure blast chamber second line of a couplet is connected to dust exhaust apparatus.
Though this equipment uses the hole on the pressure-air purge pcb board spare, but only utilize the malleation of air outlet to carry out purge, efficient is not high, though be provided with dust exhaust apparatus, but the air communication that device produces is crossed dust exhaust apparatus and is filtered the back and discharge, and makes that whole air compartment is in the positive air pressure environment in the entire equipment, causes dust to leak easily, contaminated environment, and be not easy to reclaim.
Summary of the invention
The technical problem that the present invention mainly solves provides a kind of cleaning efficiency height, dust is difficult for the pcb board spare hole slag cleaning equipment that leaks and be convenient to collect, for achieving the above object, pcb board spare provided by the invention hole slag cleaning equipment comprises wind chamber, transmitting device and dust arrester;
Described dust arrester comprises blower fan, air-out pipeline, air intake pipeline, the input of described blower fan and air intake pipeline join, described air intake pipeline is provided with air filter unit, the output of described blower fan and air-out pipeline join, the gas outlet of described air-out pipeline is provided with tuyere, and described tuyere is over against pcb board spare;
Described wind chamber is surrounded by air-locked dividing plate, is provided with the outlet of import of pcb board spare and pcb board spare, and the wind chamber is divided into front chamber and rear chamber by pcb board spare place face, and described tuyere is positioned at front chamber;
Described transmitting device comprises the transfer roller and the pressure roller that is pressed in pcb board spare upper surface of holder year pcb board spare lower surface;
The air inlet of described air intake pipeline is arranged in the rear chamber, is provided with device for recovering powder in the described rear chamber.
The present invention is different from the wind chamber that is full of the positive air pressure that leaks in the prior art with respect to environment, air inlet with the air intake pipeline is arranged in the rear chamber dexterously, because the dust that produces in the equipment mainly is to derive from the hole slag that is blown out by air-flow in the pcb board spare hole, therefore dust mainly concentrates in the rear chamber, and in the rear chamber because the getter action of air inlet, wherein air pressure is negative pressure with respect to external environment, therefore dust is difficult for leaking, and the subnormal ambient in the rear chamber makes that the draught head of pcb board spare plate face upper and lower surface is bigger, helps improving the efficient of air-flow purge.
For further optimizing the present invention, in the described wind chamber, import of pcb board spare and pcb board spare outlet side respectively are provided with a pair of transfer roller and pressure roller, and described pcb board spare import and the outlet of pcb board spare are provided with the import and export seal that prevents that dust from leaking.
For further optimizing the present invention, described import and export seal is the soft board that import of pcb board spare and pcb board spare outlet both sides are provided with.
Be further to optimize the present invention, described air filter unit comprises the air-intake filter that is arranged at air inlet, and described device for recovering powder comprises and is arranged at the space that the rear chamber bottom is used to hold the sedimentation dust, and is provided with the openable dirt plate that rushes down.
For further optimizing the present invention, described air filter unit comprises the high efficiency particulate air filter that is arranged at behind the air-intake filter, and described air-intake filter is 50 order screen packs, and described high efficiency particulate air filter is that filtering accuracy is 0.5 micron a filter.
For further optimizing the present invention again, described air-intake filter is provided with the screen pack oscillator; Be provided with the dividing plate oscillator in the described rear chamber.
Be further to optimize the present invention, described device for recovering powder comprises the cyclone separator that is arranged at before the air inlet.
For further optimizing the present invention, the quantity of described cyclone separator is more than 2, forms the multistage cyclone piece-rate system, is used for the different dust of sedimentation.
For further optimizing the present invention, described tuyere quantity is more than 2, arranges along the transmission direction of pcb board spare.
For further optimizing the present invention, described tuyere width is below 0.35mm, and wind nozzle outlet pressure reaches more than the 0.6MPa, the not saturating steel matter of minute surface in the pipeline of described air-out pipeline and air intake pipeline and tuyere adopt; Dividing plate is a stainless steel; Transfer roller is a PP roller outsourcing heat-resisting soft rubber, and roller surface is a black fluorubber material.
Description of drawings
Fig. 1 is the described pcb board spare of a specific embodiment of the invention hole slag cleaning equipment structural representation;
Fig. 2 is a pcb board spare pore space structure schematic diagram of the present invention;
Fig. 3 is slag cleaning equipment pcb board spare import of the described pcb board spare of specific embodiment of the invention hole and pcb board spare exit structural representation.
Label declaration:
1, pcb board spare 2, air intake pipeline 3, blower fan 4, air-out pipeline 5, tuyere 6, pcb board hole 7, screen pack 8, dust 9, high efficiency particulate air filter 10, dividing plate 11a, high pressure draught 11b, negative-pressure air-flow 12, unload dirt plate 13, pressure roller 14, transfer roller 15, wind chamber 15a, the 15b of front chamber, rear chamber 16, import and export seal 17, gap 18, gap, the left and right sides 19, pcb board spare are imported and exported up and down
The specific embodiment
By describing technology contents of the present invention, structural feature in detail, realized purpose and effect, give explanation below in conjunction with embodiment and conjunction with figs. are detailed.
See also Fig. 1, the invention provides a kind of pcb board spare hole slag cleaning equipment, comprise wind chamber, transmitting device and dust arrester;
Described dust arrester comprises blower fan 3, air-out pipeline 4, air intake pipeline 2, the input of described blower fan and air intake pipeline join, described air intake pipeline is provided with air filter unit, the output of described blower fan and air-out pipeline join, the gas outlet of described air-out pipeline is provided with tuyere 5, and described tuyere is over against pcb board spare 1;
Described wind chamber 15 is surrounded by air-locked dividing plate 10, be provided with import of pcb board spare and pcb board spare outlet (seeing that pcb board spare imports and exports 19 among Fig. 1), wind chamber 15 is divided into 15a of front chamber and the 15b of rear chamber by pcb board spare place face, and described tuyere 5 is positioned at the 15a of front chamber;
Described transmitting device comprises the transfer roller 14 and the pressure roller 13 that is pressed in pcb board spare upper surface of holder year pcb board spare lower surface;
The air inlet of described air intake pipeline is arranged in the 15b of rear chamber, is provided with device for recovering powder in the described rear chamber.
During the equipment operation, the blower fan running provides air-flow; It (can the both be initiatively that transfer roller in the transmitting device and pressure roller rotate, also can one active another is driven), pcb board spare is carried by the wind chamber, through the tuyere place time, because the high velocity air that tuyere blows out blows out the hole slag in the through hole on the plate, the dust that the hole slag that is blown of the overwhelming majority forms is taken to rear chamber by air-flow, is recovered by device for recovering powder, and gas is sucked by air inlet, carries out the air-flow circulation.
Blower fan is high pressure draught 11a to air outlet place air-flow, in the rear chamber because the getter action of air inlet, wherein air pressure is negative pressure with respect to external environment, so wherein air-flow is that negative-pressure air-flow 11b is (in Fig. 1, high pressure draught 11a represents with different dotted lines with negative-pressure air-flow 11b) thus dust be difficult for leaking, and the subnormal ambient in the rear chamber makes that the draught head of pcb board spare plate face upper and lower surface is bigger, helps improving the efficient of air-flow purge.
In another embodiment of the present invention, referring to Fig. 1, Fig. 3, in the described wind chamber 15, other a pair of transfer roller 14 and the pressure roller 13 of respectively being provided with of import of pcb board spare and the outlet of pcb board spare, described pcb board spare import and pcb board spare exit are provided with the import and export seal 16 that prevents that dust from leaking.
In the present embodiment owing in the wind chamber, all be provided with transfer roller and pressure roller in import of pcb board spare and exit, therefore pcb board spare is sealed by pressure roller 13 and transfer roller 14 with the gap up and down 17 in import and exit, and the gap, the left and right sides 18 in pcb board spare and import and exit is provided with import and export seal 16, being provided with on the one hand like this prevents that the dust that is blown from escaping, also blocked leaking of air-flow on the other hand to a great extent, guarantee plate face pressure reduction up and down, improved the efficient of air-flow purge.
In a specific embodiment of the present invention, described import and export seal 16 is the soft board that import of pcb board spare and pcb board spare outlet both sides are provided with.The material of soft board can be rubber, silica gel or plastics etc.Both be convenient to the plate turnover and transmitted, also can effectively fill the space, guaranteed closed performance.
In another enforcement of the present invention, referring to Fig. 1, described air filter unit comprises the air-intake filter that is arranged at air inlet, and described device for recovering powder comprises and is arranged at the space that the rear chamber bottom is used to hold the sedimentation dust, and is provided with the openable dirt plate 12 that rushes down.
Air-intake filter can effectively avoid dust to enter blower fan with air-flow, damage equipment, and the device for recovering powder that is arranged at the rear chamber below can utilize the gravitational settling raw material, collects the dust of sedimentation, and by rushing down the unlatching of dirt plate, periodic cleaning is collected.
The foregoing description is further transformed, referring to Fig. 1, described air filter unit comprises the high efficiency particulate air filter 9 that is arranged at behind the air-intake filter, and described air-intake filter is 50 order screen packs 7, and described high efficiency particulate air filter is that filtering accuracy is 0.5 micron a filter.
The structure of double-filtration has further guaranteed the normal operation of blower fan.
The foregoing description is improved again, and described air-intake filter is provided with the screen pack oscillator; Be provided with the dividing plate oscillator in the described rear chamber.
The screen pack oscillator can effectively be shaken off the dust on the screen pack, has both guaranteed the unobstructed of screen pack, reduces the number of times of safeguarding, also helps collecting dust.Same, the dividing plate oscillator of rear chamber also can be cleared up the dust that is built-up on the dividing plate, is convenient to cleaning and also helps collecting dust.
In of the present invention one implemented, described device for recovering powder comprised the cyclone separator that is arranged at before the air inlet.
Cyclone separator is the solid particle in the separation bubble effectively, and also is convenient to collect dust in the outlet of separator.
The foregoing description is improved, and the quantity of described cyclone separator is more than 2, forms the multistage cyclone piece-rate system, is used for the different dust of sedimentation.The multistage cyclone separated structures can be separated the glass fibre in the dust, and the dust that Copper Foil equigranular difference, density differ is convenient to classification and is reclaimed.
In the another embodiment of the present invention, as shown in Figure 1, the quantity of described tuyere 5 is arranged along the transmission direction of pcb board spare more than or equal to 2.Each hole is through repeatedly air-flow purge, cleaning more like this.
In another enforcement of the present invention, described tuyere width is below 0.35mm, and wind nozzle outlet pressure reaches more than the 0.6MPa, the not saturating steel matter of minute surface in the pipeline of described air-out pipeline and air intake pipeline and tuyere adopt; Dividing plate is a stainless steel; Transfer roller is PP (polypropylene) roller outsourcing heat-resisting soft rubber, and roller surface is a black fluorubber material.
The width of tuyere is meant along the width of tuyere on the pcb board spare direction of transfer, such tuyere has formed the long and narrow air knife that traverses pcb board spare, help concentrating wind-force, and can clean the hole of 0.35mm in the plate less than the tuyere of 0.35mm width, air-supply carries trunk line can adopt the not saturating steel of interior minute surface of diameter 65mm, reduces the wind flow resistance; Branch pipe(tube) and go out tuyere and adopt 3mm thickness mirror face stainless steel to make, the blower fan outlet pressure is 0.85MPa, wind nozzle outlet pressure reaches more than the 0.6Mpa, can be blown with copper wire or the copper scale that guarantees clamping stagnation in the hole.Transfer roller is a PP roller outsourcing heat-resisting soft rubber, to guarantee that plate is not scratched in the transport process.Top pressure roller adopts the black fluorubber, and one is good airproof performance, and two is high temperature resistant.Pressure roller plays two effects, transmits between plate and the forward and backward wind chamber and isolates, to guarantee the two-stage cleaning of plate.
The above only is embodiments of the invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (10)
1. a pcb board spare hole slag cleaning equipment comprises wind chamber, transmitting device and dust arrester;
Described dust arrester comprises blower fan, air-out pipeline, air intake pipeline, the input of described blower fan and air intake pipeline join, described air intake pipeline is provided with air filter unit, the output of described blower fan and air-out pipeline join, the gas outlet of described air-out pipeline is provided with tuyere, and described tuyere is over against pcb board spare;
Described wind chamber is surrounded by air-locked dividing plate, is provided with the outlet of import of pcb board spare and pcb board spare, and the wind chamber is divided into front chamber and rear chamber by pcb board spare place face, and described tuyere is positioned at front chamber;
Described transmitting device comprises the transfer roller and the pressure roller that is pressed in pcb board spare upper surface of holder year pcb board spare lower surface;
It is characterized in that the air inlet of described air intake pipeline is arranged in the rear chamber, be provided with device for recovering powder in the described rear chamber.
2. pcb board spare according to claim 1 hole slag cleaning equipment, it is characterized in that, in the described wind chamber, other a pair of transfer roller and the pressure roller of respectively being provided with of import of pcb board spare and the outlet of pcb board spare, described pcb board spare import and pcb board spare exit are provided with the import and export seal that prevents that dust from leaking.
3. pcb board spare according to claim 2 hole slag cleaning equipment is characterized in that, described import and export seal is the soft board that import of pcb board spare and pcb board spare outlet both sides are provided with.
4. pcb board spare according to claim 1 hole slag cleaning equipment, it is characterized in that, described air filter unit comprises the air-intake filter that is arranged at air inlet, described device for recovering powder comprises and is arranged at the space that the rear chamber bottom is used to hold the sedimentation dust, and is provided with the openable dirt plate that rushes down.
5. pcb board spare according to claim 4 hole slag cleaning equipment, it is characterized in that, described air filter unit comprises the high efficiency particulate air filter that is arranged at behind the air-intake filter, and described air-intake filter is 50 order screen packs, and described high efficiency particulate air filter is that filtering accuracy is 0.5 micron a filter.
6. pcb board spare according to claim 5 hole slag cleaning equipment is characterized in that described air-intake filter is provided with the screen pack oscillator; Be provided with the dividing plate oscillator in the described rear chamber.
7. pcb board spare according to claim 1 hole slag cleaning equipment is characterized in that, described device for recovering powder comprises the cyclone separator that is arranged at before the air inlet.
8. pcb board spare according to claim 7 hole slag cleaning equipment is characterized in that the quantity of described cyclone separator is more than 2, forms the multistage cyclone piece-rate system, is used for the different dust of sedimentation.
9. according to any described pcb board spare hole slag cleaning equipment of claim 1 to 8, it is characterized in that described tuyere quantity is more than 2, arrange along the transmission direction of pcb board spare.
10. according to any described pcb board spare hole slag cleaning equipment of claim 1 to 8, it is characterized in that, described tuyere width is below 0.35mm, and wind nozzle outlet pressure reaches more than the 0.6MPa, the not saturating steel matter of minute surface in the pipeline of described air-out pipeline and air intake pipeline and tuyere adopt; Dividing plate is a stainless steel; Transfer roller is a PP roller outsourcing heat-resisting soft rubber, and roller surface is a black fluorubber material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110043414 CN102179383B (en) | 2011-02-18 | 2011-02-18 | Hole slag cleaning device for PCB (printed circuit board) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110043414 CN102179383B (en) | 2011-02-18 | 2011-02-18 | Hole slag cleaning device for PCB (printed circuit board) |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102179383A true CN102179383A (en) | 2011-09-14 |
| CN102179383B CN102179383B (en) | 2013-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110043414 Active CN102179383B (en) | 2011-02-18 | 2011-02-18 | Hole slag cleaning device for PCB (printed circuit board) |
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| CN (1) | CN102179383B (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102608524A (en) * | 2012-03-31 | 2012-07-25 | 昆山迈致治具科技有限公司 | Testing jig of circuit board |
| CN104213170A (en) * | 2014-09-16 | 2014-12-17 | 四川海英电子科技有限公司 | Copper plating method for high-order high-density circuit board |
| CN104625915A (en) * | 2014-12-17 | 2015-05-20 | 宁波精华电子部件有限公司 | PCB edge bur grinding device |
| CN105458350A (en) * | 2015-12-15 | 2016-04-06 | 重庆触视科技有限公司 | Cleaning device special for circuit board |
| CN106735891A (en) * | 2017-03-09 | 2017-05-31 | 深圳吉阳智能科技有限公司 | Laser cuts lug dust pelletizing system and method |
| CN106735393A (en) * | 2016-12-26 | 2017-05-31 | 重庆新派新智能科技有限公司 | For the drilling method of printed circuit board |
| CN107597722A (en) * | 2017-07-25 | 2018-01-19 | 上海凯思尔电子有限公司 | A kind of pcb board cleaning apparatus |
| CN109158376A (en) * | 2018-09-17 | 2019-01-08 | 国网浙江武义县供电有限公司 | A kind of PC host dust cleaning case of high dust collection efficiency |
| CN109158377A (en) * | 2018-09-17 | 2019-01-08 | 国网浙江武义县供电有限公司 | A kind of PC host dust cleaning case of good dedusting effect |
| CN113145569A (en) * | 2021-01-06 | 2021-07-23 | 苏州凌创电子系统有限公司 | PCB board surface contactless cleaning device |
| CN114340181A (en) * | 2022-03-04 | 2022-04-12 | 深圳市盛鸿辉科技有限公司 | A perforation equipment for circuit board processing |
| CN115138640A (en) * | 2022-07-18 | 2022-10-04 | 裴才林 | Building data monitoring device |
| CN116000020A (en) * | 2022-12-05 | 2023-04-25 | 苏州天准科技股份有限公司 | Composite cleaning equipment and composite cleaning detection method for plate surfaces |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102608524A (en) * | 2012-03-31 | 2012-07-25 | 昆山迈致治具科技有限公司 | Testing jig of circuit board |
| CN104213170A (en) * | 2014-09-16 | 2014-12-17 | 四川海英电子科技有限公司 | Copper plating method for high-order high-density circuit board |
| CN104625915A (en) * | 2014-12-17 | 2015-05-20 | 宁波精华电子部件有限公司 | PCB edge bur grinding device |
| CN105458350A (en) * | 2015-12-15 | 2016-04-06 | 重庆触视科技有限公司 | Cleaning device special for circuit board |
| CN106735393B (en) * | 2016-12-26 | 2018-10-16 | 重庆新派新智能科技有限公司 | Drilling method for printed circuit board |
| CN106735393A (en) * | 2016-12-26 | 2017-05-31 | 重庆新派新智能科技有限公司 | For the drilling method of printed circuit board |
| CN108817696A (en) * | 2017-03-09 | 2018-11-16 | 深圳吉阳智能科技有限公司 | A kind of laser cuts tab dust pelletizing system and method |
| CN106735891A (en) * | 2017-03-09 | 2017-05-31 | 深圳吉阳智能科技有限公司 | Laser cuts lug dust pelletizing system and method |
| CN106735891B (en) * | 2017-03-09 | 2019-03-26 | 深圳吉阳智能科技有限公司 | Laser cuts tab dust pelletizing system and method |
| CN107597722A (en) * | 2017-07-25 | 2018-01-19 | 上海凯思尔电子有限公司 | A kind of pcb board cleaning apparatus |
| CN109158376A (en) * | 2018-09-17 | 2019-01-08 | 国网浙江武义县供电有限公司 | A kind of PC host dust cleaning case of high dust collection efficiency |
| CN109158377A (en) * | 2018-09-17 | 2019-01-08 | 国网浙江武义县供电有限公司 | A kind of PC host dust cleaning case of good dedusting effect |
| CN113145569A (en) * | 2021-01-06 | 2021-07-23 | 苏州凌创电子系统有限公司 | PCB board surface contactless cleaning device |
| CN114340181A (en) * | 2022-03-04 | 2022-04-12 | 深圳市盛鸿辉科技有限公司 | A perforation equipment for circuit board processing |
| CN115138640A (en) * | 2022-07-18 | 2022-10-04 | 裴才林 | Building data monitoring device |
| CN115138640B (en) * | 2022-07-18 | 2024-04-05 | 陈玉益 | Building data monitoring device |
| CN116000020A (en) * | 2022-12-05 | 2023-04-25 | 苏州天准科技股份有限公司 | Composite cleaning equipment and composite cleaning detection method for plate surfaces |
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| Publication number | Publication date |
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| CN102179383B (en) | 2013-01-23 |
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