CN203739380U - Reciprocating bending machine for layering circuit boards - Google Patents
Reciprocating bending machine for layering circuit boards Download PDFInfo
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- CN203739380U CN203739380U CN201420141639.7U CN201420141639U CN203739380U CN 203739380 U CN203739380 U CN 203739380U CN 201420141639 U CN201420141639 U CN 201420141639U CN 203739380 U CN203739380 U CN 203739380U
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- circuit board
- twisted plate
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Abstract
The utility model relates to a reciprocating bending machine for layering circuit boards. The reciprocating bending machine for layering the circuit boards comprises a machine frame and a bending mechanism, wherein the bending mechanism comprises a fixing pad plate arranged on the machine frame, a pressing plate positioned above the fixing pad plate, an upper bending plate positioned in front of the pressing plate, and a lower bending plate positioned below the upper bending plate; the pressing plate, the upper bending plate and the lower bending plate can perform reciprocating movement in the up-and-down direction respectively; the bending mechanism further comprises a pressing cylinder for driving the pressing plate to perform reciprocating movement, and a cam driving device for driving the upper bending plate and the lower bending plate to perform reciprocating movement; the bending machine further comprises an electrical apparatus control system for controlling the pressing cylinder to operate. The reciprocating bending machine for layering the circuit boards can effectively strip the circuit boards layer by layer, and is simple in arrangement and high in reliability.
Description
Technical field
the utility model relates to a kind of cyclic bending machine for circuit board layering.
Background technology
along with scientific and technological progress, the shortening in electronic product update cycle, just more than 20% speed increment with year of electronic waste, becomes fastest-rising rubbish in the world.According to interrelated data, at present the annual electronic waste producing in the whole world exceedes 5,000 ten thousand tons, wherein 70% be discarded in China by variety of way, and the electronic waste that China produced in 2007 exceedes 2,300,000 tons.So huge electronic waste, equals to natural disaster if process the bad environmental pollution causing, if process appropriately, not only can not cause environmental pollution, can also therefrom reclaim a large amount of precious metal resources, also very favourable to the fast development of electronic product.
in the recycling of electronic waste, useless circuit board is the most unmanageable, be mainly because the substrate of circuit board (being called for short PCB, lower same) is Copper Foil epoxy resin by multilayer glass-fiber-fabric wrapped folder to form by high pressure is bonding, want the glass-fiber-fabric of PCB to separate with Copper Foil very difficult.At present the processing method of PCB is mainly contained to three kinds: 1) burning method, by high temperature, glass-fiber-fabric carbonization volatilization is only reclaimed to metal exactly, because the waste gas of burning method discharge contains a large amount of bioxin, can cause serious atmosphere pollution, country has forbidden to adopt; 2) strong acid dissolution method, adopts strong acid (as sulfuric acid or chloroazotic acid) dissolving metal in PCB out to be discarded to other nonmetal object exactly, and the waste liquid that this method is discharged and discarded nonmetal object are seriously polluted, and country has also forbidden to adopt; 3) comminuting method, is ground into powder PCB exactly, then by suspension method or centrifugal process by metallic particles and glass powder separation, only reclaim metal, metal recovery rate 90-95%, and the glass powder that accounts for PCB weight 80% is again without value, landfill can contaminated land, discard in outdoor more can contaminated air.
chinese invention patent application 201210298559.8 has proposed a kind of recovery method of circuit board, it is after the layer structure of circuit board is separated, the glass layer of cloth that skin is contained to metallic circuit, middle copper foil layer and the strip off of internal layer glass layer of cloth, again the glass layer of cloth that contains metallic circuit is burned and obtains metal, copper foil layer direct reuse, and metal-free glass layer of cloth does not burn.This recovery method on the one hand, has greatly reduced burning cost, reduces and burns the pollution causing to environment; On the other hand, the glass-fiber-fabric that layering obtains can further be back to other purposes, turns waste into wealth.The key that this recovery method is implemented will effectively be separated the layer structure of circuit board exactly.Report according to the document, first utilize heater that circuit board is heated to more than 180 DEG C, then circuit board is passed through at least four group roller set of bending mechanism successively, circuit board is bent under the active force between upper roller and bottom roller, finally under the effect of internal stress, realizes separating of layer structure.The method of this layering is owing to existing following deficiency to make to be difficult to by pcb board delamination:
1, referring to Fig. 1, circuit board can layering at the break place of roller crown (A), and only just can layering between break and break, thus will be through repeatedly roll extrusion, and the break of each roll extrusion can not be overlapping, just can make the layering of pcb board large area;
2, referring to Fig. 1, no matter carry out how many times roll extrusion and all cannot make oral area (B) layering of PCB;
3, referring to Fig. 2, on a pcb board, conventionally there are up to a hundred and even thousands of jacks (C), these jacks are similar to rivet by PCB riveting jail, and socket circuit board around cannot be by layering.
Utility model content
technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, provide a kind of can be easily and effectively by each layer of the circuit board cyclic bending machine separating.
for solving above technical problem, the utility model is taked following technical scheme:
a kind of cyclic bending machine for circuit board layering, it comprises frame, be arranged on the bending mechanism in frame, described bending mechanism comprises the fixing backing plate being arranged in frame, be positioned at the pressure strip of fixing backing plate top, be positioned at the upper twisted plate in pressure strip front, be positioned at the lower twisted plate of twisted plate below, described pressure strip, upper twisted plate and lower twisted plate can move back and forth along above-below direction respectively, bending mechanism also comprises the compression cylinder for driving pressure strip to move back and forth, for the cam driving gear that drives twisted plate and lower twisted plate to move back and forth, described bending machine also comprises the electrical apparatus control system for controlling described compression cylinder action.
further, the level interval L4 between the level interval L3 between described upper twisted plate and fixing backing plate, lower twisted plate and fixing backing plate is all less than or equal to 3 times of circuit board thickness, is more than or equal to circuit board thickness.The forward position of the forward position of the close upper twisted plate of fixing backing plate, the close lower twisted plate of pressure strip is fillet, and the radius of fillet is all less than or equal to 2 times of circuit board thickness.
preferably, described cyclic bending machine also comprises that for delivery of circuit board by the feed mechanism of described bending mechanism, described feed mechanism, by described electrical apparatus control system control, stops after described circuit board is fed forward to setpoint distance.Further, feed mechanism comprises a pair of feed rolls and for driving the drive motors of feed rolls, drive motors is stepper motor or servomotor.
preferably, above-mentioned cam driving gear comprises cam, for driving motor, the upper twisted plate roller being connected with upper twisted plate that described cam rotates and the lower twisted plate roller being connected with lower twisted plate, cam has respectively upper twisted plate track and the lower twisted plate track with upper twisted plate roller and lower twisted plate roller contact.
further, described upper twisted plate track and lower twisted plate track be all along the circumferential extension of cam, and lay respectively on the relative two side faces of cam.
preferably, the every rotation of cam completes a cyclic bending cycle once enclosing cyclic bending machine, and this cyclic bending cycle comprises following five action: a, circuit board is fed forward to certain distance; B, compression cylinder drive pressure strip to compress circuit board; On c, actuated by cams, twisted plate is bent downwardly circuit board and returns fast; Under d, actuated by cams, twisted plate is bent upwards circuit board and returns fast; E, compression cylinder drive pressure strip to unclamp circuit board, and the order of described five actions is a → b → c → d → e or a → b → d → c → e.
further, described bending mechanism also comprises collects the cam angle degree positioner of stating angular displacement of the cam information and collected information being passed to electrical apparatus control system, and electrical apparatus control system is according to the cam angle degree information control feed mechanism of collecting and compression cylinder action.Cam angle degree positioner can be for example inductive switch or travel switch.
according to the utility model, described cam can be that radial cams can be also axial cam.
preferably, described bending mechanism also comprises for pressure strip, upper twisted plate and lower twisted plate are limited and make them can only do the restraint device pumping.
preferably, in described fixing backing plate, pressure strip, upper twisted plate and lower twisted plate, be respectively arranged with at least one and temperature can be heated to the heater between 120 DEG C ~ 300 DEG C.
preferably, described cyclic bending machine also comprises and is arranged on the heat-insulation layer of bending mechanism periphery for the working environment of circuit board is incubated.
due to the enforcement of above technical scheme, the utility model compared with prior art tool has the following advantages:
cyclic bending machine of the present utility model not only can effectively separate adjacent two layers of circuit board, and glass-fiber-fabric and also easily disengaging of rivet, therefore, and can be effectively by circuit board delamination; In addition, the utility model good reliability, simple in structure, arrange conveniently.
Brief description of the drawings
below in conjunction with accompanying drawing and specific embodiment, the utility model is described in more detail:
the schematic diagram of Fig. 1 for adopting the 2012102985598 roller bending methods that provide to carry out circuit board bending;
fig. 2 is the jack structure schematic diagram of circuit board;
fig. 3 looks schematic diagram according to the master of cyclic bending machine of the present utility model;
fig. 4 be in Fig. 3 A-A to cross-sectional schematic;
fig. 5 is upper twisted plate roller and the regional distribution chart of lower twisted plate roller design in the time of the direction of same footpath;
fig. 6 is a cross-sectional schematic of cam;
fig. 7 is the right side schematic diagram of Fig. 6, has wherein shown time twisted plate track;
fig. 8 is the left side schematic diagram of Fig. 6, has wherein shown upper twisted plate track;
fig. 9 is the schematic diagram of circuit board in the time of state to be bent;
figure 10 is the schematic diagram after circuit board is bent downwardly;
wherein: 1, circuit board; 3, cyclic bending machine; 30a, feed rolls; 30b, heating and thermal insulation plate; 31, fixing backing plate; 32, pressure strip; 33, upper twisted plate; 34, lower twisted plate; 350, cam; 351, compression cylinder; 352, upper twisted plate roller; 353, lower twisted plate roller; 354, cam angle degree positioner; 36, twisted plate slide bar; 37, pressure strip slide bar; 38, frame; 39, heat-insulation layer; J1, upper twisted plate track; J2, lower twisted plate track; Q1, feeding district; Q2, plastic zone; Q3, upper buckled zone; Q4, lower buckled zone.
Detailed description of the invention
embodiment 1
as shown in Figures 3 to 8, cyclic bending machine 3 of the present utility model is mainly made up of feed mechanism, fixing backing plate 31, pressure strip 32, upper twisted plate 33, lower twisted plate 34, drive unit, twisted plate slide bar 36, pressure strip slide bar 37, frame 38, heat-insulation layer 39 and corresponding inductive switch or travel switch, electrical apparatus control system etc.Drive unit comprises cam driving gear and compression cylinder 351.Fixing backing plate 31 is fixed in frame 38.Pressure strip 32 can move along pressure strip slide bar 37.Upper twisted plate 33 and lower twisted plate 34 can move along twisted plate slide bar 36.The action message of feed mechanism and each cylinder is collected by corresponding inductive switch or travel switch, and their coordination is completed by electrical apparatus control system.Pressure strip 32 drives by compression cylinder 351 reciprocating motion of doing above-below direction, and upper twisted plate 33 and lower twisted plate 34 drive the reciprocating motion of doing above-below direction by cam driving gear.
level interval L4 between level interval L3, lower twisted plate 34 and fixing backing plate 31 between upper twisted plate 33 and fixing backing plate 31 is all less than or equal to 3 times of circuit board 1 thickness.The forward position R2 of the forward position R1 of the close upper twisted plate 33 of fixing backing plate 31, the close lower twisted plate 34 of pressure strip 32 is fillet, and the radius of fillet is all less than or equal to 2 times of circuit board 1 thickness.
in this example, cam driving gear comprises motor, decelerator and by motor-driven cam 350, upper twisted plate roller 352, lower twisted plate roller 353.Cam 350 is Combined cams.On the relative two side faces of cam 350, establish respectively the upper twisted plate track J1 and the lower twisted plate track J2 that circumferentially extend along it.Upper twisted plate roller 352, lower twisted plate roller 353 are corresponding respectively to contact with upper twisted plate track J1 and lower twisted plate track J2.Described cyclic bending machine also comprises cam angle degree positioner 354.This cam angle degree positioner 354 is collected the information of cam 350 rotational angles and this information is passed to electrical apparatus control system, controls feed mechanism and compression cylinder is done corresponding actions by electrical apparatus control system.
in this example, when cam 350 is designed to turn around, cyclic bending machine completes a cyclic bending cycle.This cyclic bending cycle comprises that circuit board 1 is fed forward certain distance by following five action: a, the feed mechanism that carry out successively; B, compression cylinder 351 drive pressure strip 32 to compress circuit board 1; C, cam 350 drive upper twisted plate 33 be bent downwardly circuit board 1 and return fast; D, cam 350 drive lower twisted plate 34 be bent upwards circuit board 1 and return fast; E, compression cylinder 351 drive pressure strip 32 to unclamp circuit board 1.See Fig. 5, in 360 degree that turn around at cam 350, be designed with feeding district Q1, plastic zone Q2, upper buckled zone Q3, lower buckled zone Q4.In the time rotating in angular range corresponding to cam 350Ge district, can carry out corresponding actions.For example, in the time that cam 350 rotates in the angular range of feeding district Q1, feed mechanism can be fed forward certain distance by circuit board 1; In the time that cam 350 rotates in the angular range of plastic zone Q2, compression cylinder 351 drives pressure strip 32 that circuit board 1 is compressed, and outside the Q2 of plastic zone, pressure strip 32 unclamps circuit board 1; In the time that cam 350 rotates in the angular range of upper buckled zone Q3, cam 350 drives upper pressure strip 33 to be bent downwardly, and in the time that cam 350 rotates in the angular range of lower buckled zone Q4, cam 350 drives lower pressure strip 34 to be bent upwards.
in this example, feed mechanism comprises a pair of feed rolls 30a and for driving the drive motors of feed rolls 30a, drive motors is stepper motor or servomotor.Feed mechanism also can further comprise the plate of the heating and thermal insulation up and down 30b being arranged in frame 38, allows circuit board 1 pass through between upper and lower heating and thermal insulation plate 30b.
the step that employing the utility model carries out circuit board layering is as follows:
circuit board is fed forward certain distance L 1 by a, feed mechanism stops; B, pressure strip compress circuit board under the driving of compression cylinder; C, upper twisted plate are bent downwardly circuit board and return fast under the driving of cam; D, lower twisted plate are bent upwards circuit board and return fast under the ordering about of cam; E, compression cylinder drive pressure strip to unclamp circuit board.Above 5 steps are a cyclic bending cycle, constantly repeat the cyclic bending cycle, until feed mechanism effectively control circuit board be fed forward, then circuit board is turned around to proceed the above cyclic bending cycle, until whole circuit board all passes through cyclic bending.
embodiment 2
it is L(L=3mm that this example provides the cyclic bending machine of a kind of embodiment of utilization 1 to carry out the each amount of feeding of bending method (cyclic bending method or bending staggered floor method) to circuit board), in circuit board, every layer thickness is a (a=0.2 mm), see Fig. 9, in the time that compression is carried out bending to it, will produce the phenomenon as Figure 10, internal layer and skin will be forced to stagger H (H=1.884), the adjacent two layers h (h=0.314) that also can be staggered, h=(a × Π) ÷ 2, we remove the amount of the staggering h of adjacent two layers the degree of staggering that is referred to as adjacent two layers in amount of feeding L, and represent with d, d=h/L, when degree of staggering d is sufficiently more than the percentage elongation of material itself, the power that staggers of adjacent two layers will overcome the adhesion between them and produce and staggers, circuit board forms by multilayer glass-fiber-fabric is bonding, the percentage elongation of glass-fiber-fabric in the time that 180 spend is less than 0.3%, degree of the staggering d that Figure 10 provides is 10.47%(d=0.314/3), much larger than the percentage elongation of glass-fiber-fabric, degree of staggering is relevant with the amount of feeding, the amount of feeding is unsuitable excessive.In the time that jack rivet moves to bending staggered floor district, rivet can be stretched inclination certain angle and unclamp, and glass-fiber-fabric hole also can be drawn as ellipse, and glass-fiber-fabric and rivet are easily departed from, if cyclic bending staggered floor, glass-fiber-fabric and rivet have just more easily departed from.
above the utility model is described in detail; its object is to allow the personage who is familiar with this art can understand content of the present utility model and be implemented; can not limit protection domain of the present utility model with this; all equivalences of doing according to Spirit Essence of the present utility model change or modify, and all should be encompassed in protection domain of the present utility model.
Claims (10)
1. for a cyclic bending machine for circuit board layering, it comprises frame, is arranged on the bending mechanism in described frame, it is characterized in that:
Described bending mechanism comprises fixing backing plate, the pressure strip that is positioned at described fixing backing plate top, the upper twisted plate that is positioned at described pressure strip front being arranged in described frame, the lower twisted plate that is positioned at described upper twisted plate below, described pressure strip, upper twisted plate and lower twisted plate can move back and forth along above-below direction respectively, and described bending mechanism also comprises the compression cylinder for driving described pressure strip to move back and forth, the cam driving gear for driving described upper twisted plate and lower twisted plate to move back and forth;
Described bending machine also comprises the electrical apparatus control system for controlling compression cylinder action.
2. the cyclic bending machine for circuit board layering according to claim 1, is characterized in that: the level interval L4 between the level interval L3 between described upper twisted plate and described fixing backing plate, described lower twisted plate and described fixing backing plate is all less than or equal to 3 times of circuit board thickness, is more than or equal to circuit board thickness.
3. the cyclic bending machine for circuit board layering according to claim 1, it is characterized in that: the forward position of the forward position of the close described upper twisted plate of described fixing backing plate, the close described lower twisted plate of described pressure strip is fillet, and the radius of fillet is all less than or equal to 2 times of circuit board thickness.
4. the cyclic bending machine for circuit board layering according to claim 1, it is characterized in that: described cam driving gear comprises cam, for driving motor, the upper twisted plate roller being connected with described upper twisted plate that described cam rotates and the lower twisted plate roller being connected with described lower twisted plate, described cam has respectively and described upper twisted plate roller and upper twisted plate track and the lower twisted plate track of lower twisted plate roller contact.
5. the cyclic bending machine for circuit board layering according to claim 4, it is characterized in that: described upper twisted plate track and described lower twisted plate track be all along the circumferential extension of described cam, and lay respectively on the relative two side faces of described cam.
6. according to the cyclic bending machine for circuit board layering described in claim 4 or 5, it is characterized in that: described cam rotates the described cyclic bending machine of a circle and completes a cyclic bending cycle, and the described cyclic bending cycle comprises following five action: a, circuit board is fed forward to certain distance; B, compression cylinder drive pressure strip to compress circuit board; On c, actuated by cams, twisted plate is bent downwardly circuit board and returns fast; Under d, actuated by cams, twisted plate is bent upwards circuit board and returns fast; E, compression cylinder drive pressure strip to unclamp circuit board, and the order of described five actions is a → b → c → d → e or a → b → d → c → e.
7. the cyclic bending machine for circuit board layering according to claim 6, it is characterized in that: described cyclic bending machine also comprises for delivery of circuit board by the feed mechanism of described bending mechanism, described feed mechanism, by described electrical apparatus control system control, stops after described circuit board is fed forward to setpoint distance.
8. the cyclic bending machine for circuit board layering according to claim 7, it is characterized in that: described bending mechanism also comprises the cam angle degree positioner of collecting described angular displacement of the cam information and collected information being passed to electrical apparatus control system, described electrical apparatus control system is according to feed mechanism described in the cam angle degree information control of collecting and the action of described compression cylinder.
9. the cyclic bending machine for circuit board layering according to claim 1, is characterized in that: described bending mechanism also comprises for described pressure strip, upper twisted plate and lower twisted plate are limited and make them can only do the restraint device pumping.
10. the cyclic bending machine for circuit board layering according to claim 1, is characterized in that: in described fixing backing plate, pressure strip, upper twisted plate and lower twisted plate, be respectively arranged with at least one and temperature can be heated to the heater between 120 DEG C ~ 300 DEG C; Described cyclic bending machine also comprises and is arranged on the heat-insulation layer of described bending mechanism periphery for the working environment of circuit board is incubated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420141639.7U CN203739380U (en) | 2014-03-27 | 2014-03-27 | Reciprocating bending machine for layering circuit boards |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420141639.7U CN203739380U (en) | 2014-03-27 | 2014-03-27 | Reciprocating bending machine for layering circuit boards |
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| Publication Number | Publication Date |
|---|---|
| CN203739380U true CN203739380U (en) | 2014-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420141639.7U Expired - Fee Related CN203739380U (en) | 2014-03-27 | 2014-03-27 | Reciprocating bending machine for layering circuit boards |
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| CN (1) | CN203739380U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103909121A (en) * | 2014-03-27 | 2014-07-09 | 宁波同道恒信环保科技有限公司 | Reciprocating bending machine for layering circuit boards |
-
2014
- 2014-03-27 CN CN201420141639.7U patent/CN203739380U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103909121A (en) * | 2014-03-27 | 2014-07-09 | 宁波同道恒信环保科技有限公司 | Reciprocating bending machine for layering circuit boards |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 Termination date: 20160327 |
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| CF01 | Termination of patent right due to non-payment of annual fee |