CN106180139A - A kind of retracting device of abandoned printed circuit board residue solder - Google Patents
A kind of retracting device of abandoned printed circuit board residue solder Download PDFInfo
- Publication number
- CN106180139A CN106180139A CN201610563220.4A CN201610563220A CN106180139A CN 106180139 A CN106180139 A CN 106180139A CN 201610563220 A CN201610563220 A CN 201610563220A CN 106180139 A CN106180139 A CN 106180139A
- Authority
- CN
- China
- Prior art keywords
- wpcb
- sheet
- sand
- rotating cylinder
- holes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/82—Recycling of waste of electrical or electronic equipment [WEEE]
Abstract
The present invention relates to the retracting device of a kind of abandoned printed circuit board residue solder.WPCB mating plate is fully contacted with preheating sand in processing means and gravel, under noble gas, device ceaselessly rotates, internal floor with holes constantly promotes, substantial amounts of sand pours down in floor hole, promotes WPCB sheet to be sufficiently mixed with the hot sand higher than solder melt point, and solder is melted by hot sand rapidly from WPCB sheet surface and rolls up sweeps disengaging, residue solder in stitch pore is constantly gradually melted and is through the hot abrasive band of pore by the impact of thin hot sand, solder, thus reach quickly to remove the purpose of solder.The present invention runs in confined conditions, electric-heating-wire-heating, temperature-controllable, and in WPCB sheet pin angle, solder clearance reaches more than 98%, and surface solder joint solder clearance reaches 100%, has simple in construction, environmental protection, and disposal ability is big, fluidization operation, can the advantage such as industrialization promotion.
Description
Technical field
The present invention relates to the retracting device of a kind of abandoned printed circuit board residue solder, postorder WPCB can be alleviated and process technique
Heavy metal pollution problem, belong to the novel process device of a kind of energy-conserving and environment-protective.
Background technology
United Nations University issues report for 2015 and claims, and within 2018, global electronic garbage will hit new peak, and reach 50,000,000 tons,
Waste electronic and electric equipment (waste electric and electronic equipment, WEEE) is had become as solid
Important component part in the process of body refuse.Electric equipment products is constantly to integrated, micro computerization development so that integrated circuit skill
Carrier-the electronic circuit board (printed circuit board, PCB) of art becomes the base components of EEE industry, and PCB accounts for institute
There are WEEE weight ratio nearly 3%, its design and fabrication technology Highgrade integration and automatization, the update speed of its product
Also presenting the trend of quickening, made in China PCB in 2017 will account for the 44.13% of world market share, and China is also simultaneously
WEEE import and recycling big country, through various channels, finally enter the discarded PCB(WPCB of China) present surge state
Gesture, it processes caused environmental problem improperly and has obtained governments at all levels and generally pay much attention to, has become as what China faced
Severe environmental issue.A large amount of electronic components are the base units of composition PCB, and different electronic components is welded on an increasing by solder
In resin plate surface or the form with stitch insert the aperture of resin plate by force, then assembled by welding robot or manual welding
Forming, solder has relatively low fusing point, and the fusing point of conventional leaded solders is about at 183 ~ 247 DEG C, and the fusing point of lead-free solder is about
At 217 ~ 227 DEG C, continuing to rise high-temperature, solder can spread in the form of a vapor.In WPCB plate surface and stitch hole, residue is a large amount of
Solder, reaches as high as more than 15%, and for reclaiming solder and avoiding polluting, the WPCB tabula rasa having disassembled electronic component is carrying out postorder
Need to carry out removal and the recovery of solder, beneficially postorder advanced treating during process.This plant running temperature is slightly above solder melt point,
The organic pyrolysis temperature less than in resin plate, decreases the release of volatile organic matter, and this pretreating process improves
Environmental quality in WPCB subsequent treatment process, reduces the release of the heavy metals such as lead, zinc, stannum, it is achieved that WPCB solder fast
Speed reclaims, and maximizes the recycling realizing WPCB solder resource, repeatable utilization during improve WPCB recycling treatment
The value of product.
Summary of the invention
The present invention is directed to WPCB mating plate remains a removal difficult problem for solder, propose a kind of abandoned printed circuit board residue solder
Retracting device.
The retracting device of the abandoned printed circuit board residue solder that the present invention proposes, by revolution stirring structure, input and output material system
System and WPCB sheet form with heat exchange matter separate section, temperature control and anti-oxidation part；Temperature control and anti-oxidation part are by heat-insulation layer, outer anti-
Sheath, high-alumina brick, heating wire, air inlet and thermocouple temperature measurement composition, the axial inwall of external protection coating is provided with high-alumina brick, high-alumina brick
It is provided with heating wire；External protection coating longitudinal direction both sides inwall is provided with heat-insulation layer；Revolution stirring structure is by buncher, sprocket wheel, axle
Hold, support roller, rotating cylinder and floor with holes composition, rotating cylinder is horizontally disposed in external protection coating, and heat-insulation layer, outer is stretched out at rotating cylinder two ends successively
The both sides of overcoat, rotating cylinder two ends and external protection coating junction are provided with bearing, and rotating cylinder one end is charging aperture, and the other end is discharging
Mouthful；Sprocket wheel connects buncher, and sprocket wheel connects rotating cylinder, and sprocket wheel drives rotating cylinder to carry out rotary operation；Several floors with holes are uniform
Being distributed in rotating cylinder, the two ends of each floor with holes are individually fixed on rotating cylinder inwall, and support roller connects rotating cylinder；Discharging system
With WPCB sheet with heat exchange matter separate section by feed hopper, feeding conveyor, chute with holes, discharge nozzle, sieve, WPCB sheet sand separation
Room, outfeed belt conveyor, sand discharging opening, WPCB sheet, sand and gravel compound composition, feed hopper connects feeding conveyor, feeds defeated
Sending machine to pass through feed pipe and connect the charging aperture of rotating cylinder one end, described feed pipe is provided with air inlet；One end of rotating cylinder discharging opening is even
Connecing discharge nozzle, described discharging opening is connected with discharge nozzle junction chute with holes, and chute with holes is in tilted layout, i.e. with rotating cylinder axle center
Line has angle；When rotating cylinder rotates, floor with holes is driven jointly to rotate, when the floor with holes rotated with rotating cylinder rotates to high-order,
And when the floor with holes of described splendid attire WPCB sheet, sand and gravel compound open wide position be directed downward time, be positioned at floor with holes
WPCB sheet, sand and gravel compound fall in chute with holes under gravity, discharge nozzle connect WPCB sheet sand separation room, go out
Material pipe is provided with survey hole of thermocouple, and WPCB sheet sand separation is indoor diagonally disposed has sieve, described sieve be used for separating WPCB sheet, sand and
Gravel compound, the exit of described WPCB sheet connects has outfeed belt conveyor, WPCB sheet to be transported to equipment by outfeed belt conveyor
Outside, WPCB sheet sand separation is provided with in sand discharging opening bottom room, and the sand being sized out and gravel mixing are discharged to through sand discharging opening
Device external recycles, and rotating cylinder shape can be any one in cylinder or hollow prism body etc..
In the present invention, floor with holes is rectangular structure, if being evenly distributed with dry hole on it, and a diameter of 10-in described hole
20mm, in floor broadside centerline bending with holes, bending angle is 90-170o, the number in described hole is determined on a case-by-case basis,
Described hole can be any one in circular hole or square hole etc..
In the present invention, use in chain drive, meshed transmission gear or belt transmission etc. between described sprocket wheel and buncher
Any one.
In the present invention, described electric-heating-wire-heating can select the intensification of Fossil fuel direct combustion, high-temperature hot-air etc., and heating wire is water
Plain cloth is put, it would however also be possible to employ ring-wound layout etc..
In the present invention, described high-alumina brick can use refractory material, such as refractory materials such as asbestos, aluminium silicate wools.
In the present invention, survey hole of thermocouple can also be arranged in other proper site simultaneously, can also use infrared simultaneously
Thermometric etc..
In the present invention, described sieve can be any one in gravity flow screen, rotary screen, vibrosieve or inertia vibrating screen etc..
In the present invention, feeding conveyor, outfeed belt conveyor arranged direction and installation site are not limited to diagram, outfeed belt conveyor
Can also be that other is with transmitting, feeding and the charging/discharging device etc. of sealing function.
The operating procedure of the retracting device of the abandoned printed circuit board residue solder that the present invention proposes, specifically comprises the following steps that
(1) WPCB tabula rasa is sent into shear breaker, be crushed to 10-50mmWPCB sheet；
(2) uniformly send into through feed hopper and feeding conveyor together with the gravel of 4.5-5.5mm turn being milled to the sand of 50-80 mesh
In cylinder, in setting rotating cylinder, temperature is as 210-250 DEG C, opens heater；Proportional relation between sand and gravel
(3) set buncher rotating speed as 0.2-5r/min, start buncher, be sufficiently stirred for, make sand and gravel be heated evenly；
(4) after rotating cylinder and sand and gravel reach design temperature, open air inlet and air vent, after being passed through nitrogen 3-5min simultaneously
Through feed hopper, broken and load weighted WPCB sheet are sent into rotating cylinder, and WPCB sheet with the mass ratio of sand and gravel compound gross mass is
1:50-1:10；
(5) under the drive of rotating cylinder, WPCB sheet is gradually promoted by floor with holes, when floor with holes moves to a high position, floor with holes
Retain WPCB sheet therein and a small amount of sand and gravel and open wide position simultaneously landing in chute with holes from floor with holes, carry out
First screening, under gravity, WPCB sheet, sand and the gradually landing of gravel compound are oblique to being positioned at WPCB sheet sand separation indoor
The sieve surface placed carries out secondary and screens out sand and gravel, when WPCB sheet landing to sieve one side bottom, is carried by outfeed belt conveyor
Processing to post-order process, the sand screened out and gravel are periodically back to cylinder.
The beneficial effects of the present invention is: after WPCB plate is sheared coarse crushing, by it and higher than solder melt point, less than WPCB plate
The hot sand of pyrolysis temperature and little gravel mixed heat transfer in the cylinder that can rotate, utilizes frictional force and the gravity of little gravel of sand
Impact, reaches quickly to remove WPCB tabula rasa surface and the purpose of stitch internal residue solder.This device is installed at input and output material position
The airtight condition that provides of the conveyer with sealing function under run, employ nitrogen as hot solder protection against oxidation gas, heat
Galvanic couple controls heating-up temperature.WPCB sheet falls in warmed-up cylinder in the transmission of feeding conveyor, with gravel at rib with holes
Being sufficiently mixed heat exchange under the stirring of plate, after being taken to a high position by floor with holes, WPCB sheet together falls into holes slipping with a small amount of gravel simultaneously
In groove, the most gradually to the landing of discharging opening direction, last WPCB sheet sieves, and makes WPCB sheet divide with the gravel of spilling
From, the lower gravel of sieve is stored and refluxes, and on sieve, WPCB sheet is sent into next treatment process by discharging opening conveyer.It is stripped of solder
WPCB plate shape and intensity are constant, almost without pyrolysis, it is achieved that the recovery of solder and minimizing heavy metal pollution.This processing means exists
Running under airtight condition, electric-heating-wire-heating, temperature-controllable, in WPCB tabula rasa pin angle, solder clearance reaches more than 98%, surface solder joint
Solder clearance reaches 100%, has simple in construction, environmental protection, and disposal ability is big, fluidization operation, can the advantage such as industrialization promotion.
Accompanying drawing explanation
Fig. 1 is the structural diagrams of the present invention.
Fig. 2 is A-A profile.
Fig. 3 is the structural diagrams of chute with holes.
Fig. 4 is the structural diagrams of floor with holes.
Label in figure: 1 is buncher, 2 is sprocket wheel, and 3 is air inlet, and 4 is feeding conveyor, and 5 is feed hopper, and 6 for protecting
Temperature layer, 7 is external protection coating, and 8 is high-alumina brick, and 9 is heating wire, and 10 is floor with holes, and 11 is rotating cylinder, and 12 is chute with holes, and 13 are
Bearing, 14 is survey hole of thermocouple, and 15 is support roller, and 16 is discharge nozzle, and 17 is sieve, and 18 is WPCB sheet sand separation room, and 19 is discharging
Conveyer, 20 is sand discharging opening, and 21 is WPCB sheet, and 22 is sand and gravel compound.
Detailed description of the invention
Combine accompanying drawing below by embodiment and further illustrate the present invention.
Embodiment 1:
This device exterior protection layer 7 and internal high-alumina brick 8 thereof, heat-insulation layer 6, heating wire 9 collectively forms external insulation and adds hot merit
Energy；Feed hopper 5 is internally installed material conveyer 4, completes charging and uniformly carries the function of material；Air inlet pipe 3 is arranged on charging
Bucket 5 is outside, can connect the gases such as nitrogen；Drum rotation function is made up of the sprocket wheel 2 coordinated with it, tugboat 15 and bearing 13, speed governing
Motor 1 utilizes driving-chain to connect sprocket wheel 2, drives the rotating cylinder 11 that matches with sprocket wheel 2 and with holes with what rotating cylinder 11 was fixed together
Floor 10 rotates jointly, and floor 10 with holes can promote sand and gravel 22 and WPCB sheet 21 simultaneously, substantial amounts of in lifting process
Sand and gravel compound 22 form flow regime through floor 10 with holes, clash into WPCB sheet 21, are promoted to the WPCB sheet of a high position
21 fall chute 12 with holes under gravity in reach preliminary WPCB sheet 21 and sand separation.WPCB sheet falls to through discharge nozzle 16
Sieving 17 surfaces, its drop temperature is recorded by the thermocouple in survey hole of thermocouple 14, and WPCB sheet 21 is at gravity and vibrates outer masterpiece
Slowly transport to bottom to outfeed belt conveyor 19 with lower, be uniformly delivered to device external by outfeed belt conveyor 19, part with
Sand and gravel 22 that WPCB21 overflows sieve through sieve 17, make through sand discharging opening 20 device for transferring outer loop under gravity
With.
The specifically used flow process of this device is as follows:
(1) choose coarse crushing to the WPCB sheet 1Kg of about 30 × 30mm, set 230 DEG C of operating temperatures and 0.3r/min cylinder rotation rate.
(2) add cold gravel 10Kg, wherein contain fine sand (60 mesh) 9Kg and gravel (diameter 2-3mm) 1kg, open preheating
Device；
(3) opening air inlet/outlet after being preheated to 230 DEG C, be passed through nitrogen 10min, nitrogen flow is 10L/min；
(4) through feed hopper add load weighted WPCB sheet, open buncher, rotating speed controls at 0.3 turn/min, open simultaneously into
Material conveyer, conveying capacity controls at about 1Kg/min；
(5) WPCB sheet and hot gravel abundant heat exchange 2min；
(6) quickly by WPCB sheet discharging to sieve, unlatching outfeed belt conveyor, it is achieved gravel and the sharp separation of WPCB sheet；
(7) randomly drawing 30 × 30mmWPCB sheet 2, in statistics welding hole, number removed by solder, calculates clearance；
Solder removal effect under table 1 different temperatures nitrogen atmosphere
| Temperature (DEG C) | Rotating speed (r/min) | Solder bumps removes (individual) | Clearance (%) |
| 210 | 0.3 | 100/116 | 86.2 |
| 230 | 0.3 | 163/169 | 96.4 |
| 250 | 0.3 | 140/140 | 100 |
Claims (3)
1. the retracting device of abandoned printed circuit board residue solder, by turning round stirring structure, discharging system and WPCB sheet and changing
Caloic separate section, temperature control and anti-oxidation part composition；It is characterized in that:
Temperature control and anti-oxidation part are made up of heat-insulation layer, external protection coating, high-alumina brick, heating wire, air inlet and thermocouple temperature measurement, outward
The axial inwall of overcoat is provided with high-alumina brick, high-alumina brick is provided with heating wire, and described high-alumina brick uses asbestos or aluminium silicate wool material
Material, described electric-heating-wire-heating selects Fossil fuel direct combustion to heat up or high-temperature hot-air, and heating wire is arranged horizontally or uses annular to twine
Around layout；External protection coating longitudinal direction both sides inwall is provided with heat-insulation layer；Revolution stirring structure is by buncher, sprocket wheel, bearing, torr
Wheel, rotating cylinder and floor with holes composition, rotating cylinder is horizontally disposed in external protection coating, and rotating cylinder shape is to appoint in cylinder or hollow prism body
One, rotating cylinder two ends stretch out the both sides of heat-insulation layer, external protection coating successively, and rotating cylinder two ends and external protection coating junction are provided with bearing,
Rotating cylinder one end is charging aperture, and the other end is discharging opening；Sprocket wheel connects buncher, and sprocket wheel connects rotating cylinder, described sprocket wheel and speed governing
Using any one in chain drive, meshed transmission gear or belt transmission between motor, sprocket wheel drives rotating cylinder to carry out rotary operation；If
A dry floor with holes is uniformly distributed in rotating cylinder, and the two ends of each floor with holes are individually fixed on rotating cylinder inwall, and support roller connects
Rotating cylinder；Discharging system and WPCB sheet and heat exchange matter separate section by feed hopper, feeding conveyor, chute with holes, discharge nozzle,
Sieve, WPCB sheet sand separation room, outfeed belt conveyor, sand discharging opening, WPCB sheet, sand and gravel compound composition, feed hopper connect into
Material conveyer, feeding conveyor connects the charging aperture of rotating cylinder one end by feed pipe, and described feed pipe is provided with air inlet；Rotating cylinder
One end of discharging opening connects discharge nozzle, and described discharging opening is connected with discharge nozzle junction chute with holes, and chute with holes tilts cloth
Put, i.e. with rotating cylinder axial line, there is angle；When rotating cylinder rotates, floor with holes is driven jointly to rotate, with holes when rotate with rotating cylinder
Floor rotates to high-order, and when the floor with holes of described splendid attire WPCB sheet, sand and gravel compound open wide position be directed downward time,
Being positioned at the WPCB sheet of floor with holes, sand and gravel compound and fall chute with holes under gravity, discharge nozzle connects
WPCB sheet sand separation room, discharge nozzle is provided with survey hole of thermocouple, and WPCB sheet sand separation indoor are diagonally disposed sieve, and described sieve is used
In separating WPCB sheet, sand and gravel compound, the exit of described WPCB sheet connects has outfeed belt conveyor, WPCB sheet to pass through discharging
Conveyer is transported to device external, and WPCB sheet sand separation is provided with in sand discharging opening bottom room, the sand being sized out and gravel mixing
It is discharged to device external through sand discharging opening recycle.
Device the most according to claim 1, it is characterised in that floor with holes is rectangular structure, if being evenly distributed with on it
Dry hole, a diameter of 10-20mm in described hole, in floor broadside centerline bending with holes, bending angle is 90-170o, described
The number in hole is determined on a case-by-case basis, and described hole can be any one in circular hole or square hole.
Device the most according to claim 2, it is characterised in that described sieve is that gravity flow screen, rotary screen, vibrosieve or inertia shake
Move any one in sieve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610563220.4A CN106180139A (en) | 2016-07-15 | 2016-07-15 | A kind of retracting device of abandoned printed circuit board residue solder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610563220.4A CN106180139A (en) | 2016-07-15 | 2016-07-15 | A kind of retracting device of abandoned printed circuit board residue solder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106180139A true CN106180139A (en) | 2016-12-07 |
Family
ID=57475496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610563220.4A Pending CN106180139A (en) | 2016-07-15 | 2016-07-15 | A kind of retracting device of abandoned printed circuit board residue solder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106180139A (en) |
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| CN2301860Y (en) * | 1997-08-01 | 1998-12-30 | 广东省包装食品机械研究所 | Circulation hot sand baking machine |
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| C06 | Publication | ||
| PB01 | Publication | ||
| CB02 | Change of applicant information |
Address after: Xuchang City, Henan province 461000 Weidu District No. 64 Xin'an Road Applicant after: Wang Jing Address before: 100000 Haidian District City, North Road, Beijing hot springs Township, No. 289 Applicant before: Wang Jing |
|
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161207 |