CN102476073A - Method and apparatus for plastic sorting - Google Patents
Method and apparatus for plastic sorting Download PDFInfo
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- CN102476073A CN102476073A CN2011101210569A CN201110121056A CN102476073A CN 102476073 A CN102476073 A CN 102476073A CN 2011101210569 A CN2011101210569 A CN 2011101210569A CN 201110121056 A CN201110121056 A CN 201110121056A CN 102476073 A CN102476073 A CN 102476073A
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- 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
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention provides a method and an apparatus for sorting plastic. The method, used for sorting the plastic (21) of same type and having same polarity electricity, has two working procedures: separating the plastic above the reference value and separating the plastic below the reference value based on the reference value. The reference value is set between the unit weight charge mean value of the thick plastic (21a) and the unit weight charge mean value of the thin plastic (21b), thereby obtaining the method of sorting plastic without affected by the shape of the plastic.
Description
Technical field
The present invention relates to method of separating plastic and plastic Separator, particularly be used for the method for separating plastic and the plastic Separator of the charged plastics of sorting.
Background technology
In the resource reutilization operation of household appliances etc., generally after the single part of easy recovery is removed in operation by hand, by the pulverizer milling product.The fragment of being pulverized by pulverizer at first utilizes magnetic force or difference in specific gravity branch to elect sheet metal mixture and plastic sheet mixture as.
For with of the Reuse of materials of plastic sheet mixture, must from the plastic sheet mixture, press each kind separating plastic as household appliances.As by the method for each kind separating plastic, the method for separating of the difference in specific gravity utilized is arranged as everyone knows or utilize the method for separating of static.From the plastic sheet mixture, press each kind separating plastic with these method for separating.Because these plastics that sub-elect are obtained by milling product, so, in the plastics of this sorting, there is the thickness different plastics to mix.
By behind each kind separating plastic, for example remove the plastics that include harmful substances through the harmful substance in the irradiation X-ray check plastics.At this moment, because the deviation of plastics thickness becomes the reason that causes accuracy of detection to reduce, so, seek to come separating plastic by each thickness.
In addition, in household appliances, because manufacturing process is different for thick plastics and thin plastics, even the plastics of identical type also use different plastics such as molecular weight.Through pressing the thickness sorting plastics, can obtain and thick plastics and the thin corresponding regenerated plastics of plastics manufacturing process separately.For this reason, also seek to come separating plastic from this point by each thickness.
As the method for pressing the thickness sorting plastics, for example proposed in Japan special table 2006-505419 communique that the slit separator is set separating plastic has been become plastics and the method for passing through the plastics of slotted eye through the slotted eye of slit separator.
In pulverize the plastics that household appliances etc. obtain with pulverizer, because the shape of the product of pulverizing or according to the crush force of pulverizer has the plastics of curved shape more.
In the method that above-mentioned communique is put down in writing, the slotted eye of the length through certain thickness comes the thickness of separating plastic with plastics.But, be not limited to thick plastics, even for thin plastics, the plastics of curved shape can not pass through this slotted eye sometimes, so it is difficult coming separating plastic by the method for being put down in writing in the above-mentioned communique by each thickness.
Summary of the invention
The present invention makes in view of above-mentioned problem, its objective is the method for separating plastic and the plastic Separator that the influence that can suppress the shape by plastics and cause are provided, come separating plastic by each thickness.
Method of separating plastic of the present invention is to be used for the method for separating plastic that sorting has the same kind plastics of identical polar electricity, has following operation.Separate plastics and the plastics of not enough a reference value more than a reference value based on a reference value, this a reference value is set between the Unit Weight electric charge mean value of plastics of Unit Weight electric charge mean value and thin thickness of plastics of the thicker among the plastics.
According to method of separating plastic of the present invention; Through based on a reference value between the Unit Weight electric charge mean value of the plastics of the Unit Weight electric charge mean value of the plastics that are set in the thicker among the plastics and thin thickness; Separate the above plastics of a reference value and the plastics of not enough a reference value, can reclaim thick plastics and thin plastics respectively.For this reason, can suppress the influence that causes because of plastic shape, can come separating plastic by each thickness.
Above-mentioned and following detailed description involved in the present invention that other purpose, characteristic, situation and advantage can be understood according to associated drawings of the present invention and clear and definite.
Description of drawings
Fig. 1 is the sketch map that uses the method for separating plastic of plastic Separator in the expression embodiment 1 of the present invention.
Fig. 2 is the sketch map that uses the method for separating plastic of plastic Separator in the expression embodiment 2 of the present invention.
Fig. 3 is the sketch map that uses the method for separating plastic of plastic Separator in the expression embodiment 3 of the present invention.
Fig. 4 is the sketch map that uses the method for separating plastic of plastic Separator in the expression embodiment 4 of the present invention.
Fig. 5 is the sketch map that uses the method for separating plastic of plastic Separator in the expression embodiment 5 of the present invention.
Fig. 6 is the sketch map that uses the method for separating plastic of plastic Separator in the expression embodiment 6 of the present invention.
Fig. 7 is the sketch map that uses the method for separating plastic of plastic Separator in the expression embodiment 7 of the present invention.
Fig. 8 is the sketch map that uses the method for separating plastic of plastic Separator in the expression embodiment 8 of the present invention.
The specific embodiment
Below, based on accompanying drawing embodiment of the present invention is described.
(embodiment 1)
Beginning describes the method for separating plastic of embodiment 1 of the present invention.
At first, the plastic Separator to this embodiment describes.
With reference to Fig. 1, plastic Separator 1 is the device that is used for the charged plastics of sorting 2.Plastics 2 comprise positively charged plastics 21 and electronegative plastics 22.Positively charged plastics 21 positively chargeds.Positively charged plastics 21 comprise the plastics 21a of the thicker that has the identical polar electricity and the plastics 21b of thin thickness.Electronegative plastics 22 are electronegative.Electronegative plastics 22 comprise the plastics 22a of the thicker that has the identical polar electricity and the plastics 22b of thin thickness.In addition, positively charged plastics 21 can be ABS resins.At this moment, the thickness of the thick plastics 21a in the positively charged plastics 21 can be more than the 2mm, and the thickness of thin plastics 21b can be below the 1mm.
Plastic Separator 1 mainly has electrod assembly 3, returnable 4, Charging system 5 and transfer unit 6.
Returnable 4 is configured in the below of fall area 7.Returnable 4 has ground connection side returnable 41 and positive side returnable 42.Ground connection side returnable 41 is arranged to recyclable positively charged plastics 21.Ground connection side returnable 41 is configured in earth electrode 3a side below fall area 7.Positive side returnable 42 is arranged to recyclable electronegative plastics 22.Positive side returnable 42 is configured in positive electrode 3b side below fall area 7.
Ground connection side returnable 41 in the returnable 4 has a zone (recovery zone) 4b and another zone (recovery zone) 4c that is separated by demarcation strip 4a.Ground connection side returnable 41 in the returnable 4 has a regional 4b of separation ground connection side returnable 41 and the demarcation strip 4a of another regional 4c.Demarcation strip 4a is arranged to extend to earth electrode 3a and positive electrode 3b direction separately along electrod assembly 3.The crisscross extension of the direction that earth electrode 3a and the positive electrode 3b that demarcation strip 4a is arranged in electrod assembly 3 faces with fall area 7 separately.
Ground connection side returnable 41 in the returnable 4 constitutes and can constitute and can reclaim the plastics 21b that approaches at another regional 4c at the thick plastics 21a among a regional 4b reclaims the plastics 21b of plastics 21a and thin thickness of thicker of the positively charged plastics 21 that have the identical polar electricity.
In addition, because the positive side returnable 42 in the returnable 4 does not have demarcation strip 4a, so, do not constitute the plastics 22a of the thicker in the electronegative plastics 22 that separately reclaim band identical polar electricity and the plastics 22b of thin thickness.
Then, the method for separating plastic to the plastic Separator 1 that adopts this embodiment describes.
With reference to Fig. 1, method of separating plastic is the method that is used for the charged plastics of sorting 2.At first, will be by frictional electrification the mixture of plastics 2 of positively charged plastics 21 and electronegative electronegative plastics 22 of positively charged drop into Charging system 5.Through in Charging system 5, stirring, by frictional electrification, positively charged plastics 21 positively chargeds, electronegative plastics 22 are electronegative.Charged positively charged plastics 21 and electronegative plastics 22 are discharged on the transfer unit 6 from Charging system 5.
Be discharged to positively charged plastics 21 and electronegative plastics 22 on the transfer unit 6 are transported to fall area 7 by transfer unit 6 top.Positively charged plastics 21 and electronegative plastics 22 are through supplying with from transfer unit 6 whereabouts and to fall area 7 above fall area 7.
Through illustrated power supply never earth electrode 3a and positive electrode 3b are applied voltage, between earth electrode 3a and positive electrode 3b, form electric field.Change the whereabouts track of the charged plastics 2 that fall in fall area 7 by the electrostatic force that receives from this electric field.
In the process that fall area 7 falls, the whereabouts orbit transfer of charged plastics 2, charged plastics 2 are reclaimed by the returnable that is configured in fall area 7 belows 4.Positively charged plastics 21 in the charged plastics 2 receive electrostatic force and are reclaimed by the ground connection side returnable in the returnable 4 41 at earth electrode 3a side joint, and electronegative plastics 22 receive electrostatic force and reclaimed by the positive side returnable in the returnable 4 42 at positive electrode 3b side joint.
Be recovered to the plastics 21a that has the thicker in the electric positively charged plastics 21 of identical polar of ground connection side returnable 41 and the plastics 21b of thin thickness and be recovered to a regional 4b and another the regional 4c that separates by demarcation strip 4a respectively.
In the process that fall area 7 falls charged plastics 2 accept electrostatic force and the amount of movement that moves in the horizontal direction by the Unit Weight carried charge decision of charged plastics 2; The Unit Weight carried charge is big more, and then the amount of movement of horizontal direction (direction of intersecting with falling direction) is many more in fall area 7.
Charged for plastics 2, electric charge accumulation is on the surface of plastics 2.For this reason, the Unit Weight quantity of electric charge of the thin plastics 21b in the positively charged plastics 21 is more than thick plastics 21a.Therefore, the amount of movement of thin plastics 21b horizontal direction in fall area 7 is bigger than thick plastics 21a.
With the amount of movement of horizontal direction in the fall area 7 of thick plastics 21a and thin plastics 21b accordingly; Utilize demarcation strip 4a to be separated into a regional 4b and another regional 4c to returnable 4; Thus; When positively charged plastics 21 are reclaimed by returnable 4, reclaim thick plastics 21a at a regional 4b of returnable 4, reclaim thin plastics 21b at another regional 4c.
In addition; Under the state of the position of setting demarcation strip 4a based on a reference value between the Unit Weight electric charge mean value of Unit Weight electric charge mean value that is set in thick plastics 21a and thin plastics 21b, also can carry out the recovery of thick plastics 21a and thin plastics 21b.In addition, a plurality of because thick plastics 21a and thin plastics 21b have respectively, there is deviation in thickness separately, so, in order to set a reference value for, applying unit weight electric charge mean value.
The position of the set positions demarcation strip 4a that falls at positively charged plastics that have the electric charge suitable 21 with a reference value.Thus, can divide the thick plastics 21a of thin plastics 21b that the Unit Weight electric charge mean value of hanking surpasses a reference value and Unit Weight electric charge mean value deficiency a reference value and reclaim.Promptly; Through between the Unit Weight electric charge mean value of the Unit Weight electric charge mean value of thick plastics 21a and thin plastics 21b, setting a reference value; A regional 4b in the returnable of being separated by demarcation strip 4a 4 reclaims the thick plastics 21a of the not enough a reference value of Unit Weight electric charge mean value, reclaims the thin plastics 21b that Unit Weight electric charge mean value surpasses a reference value at another regional 4c.Thus, can the thick plastics 21a and thin plastics 21b of sorting.
Then, an example of the method for separating plastic of this embodiment is carried out more detailed explanation.
In the resource reutilization operation of household appliances etc., pulverize the plastic hybrid that obtains by pulverizer and mainly constitute by polypropylene (PP) resin, acrylonitrile-butadiene-styrene (ABS) (ABS) resin, polystyrene (PS) resin.After reclaiming the PP resin sorting of light specific gravity, drop into Charging system 5 to the plastic hybrid that constitutes by ABS resin, PS resin and remaining PP resin by differential-density saparation.In Charging system 5, stir and make the ABS resin positively charged, make PS resin and remaining PP resin strip negative electricity.The ABS resin of positively charged reclaims in fall area 7 whereabouts and by ground connection side returnable 41, and electronegative PS resin and remaining PP resin reclaim in fall area 7 whereabouts and by positive side returnable 42.
From the ABS resin that household appliances reclaim, comprise to come free injection moulding and the ABS resin sheet of the injection grade of the parts that are shaped and from the ABS resin sheet of extruding grade of profile extruded parts.Thickness from the ABS resin sheet of injecting grade is about 2mm, and the Unit Weight electric charge mean value that is formed by frictional electrification is roughly 20nC/g.In addition, said thickness is about 2mm, is meant 2mm ± 0.2mm.Thickness from the ABS resin sheet of extruding grade is below the 1mm, and the Unit Weight electric charge mean value that is formed by frictional electrification is roughly 50nC/g.
For this reason; Set a reference value between 20～50nC/g for example 40nC/g; Set the position of the demarcation strip 4a of ground connection side returnable 41 accordingly with it; Thus, the ABS resin sheet from the injection grade about thickness 2mm is reclaimed by a regional 4b, being reclaimed by another regional 4c from the ABS resin sheet of extruding grade below the thickness 1mm.Thus, can be divided into about thickness 2mm from the injection grade the ABS resin sheet and below the thickness 1mm from the ABS resin sheet of extruding grade.Like this, the ABS resin sheet of sorting can be divided into the injection grade and extrude grade purposes separately and utilize.
Then, the action effect to this embodiment describes.
According to this embodiment; Charged corresponding to positively charged plastics 21; Change the whereabouts track of the positively charged plastics 21 that fall in fall area 7 by electrod assembly 3; Thus, can thick plastics 21a and thin plastics 21b be recovered to a regional 4b and another the regional 4c that is separated by demarcation strip 4a respectively.For this reason, can suppress the influence that the shape because of plastics 2 causes, can carry out sorting to plastics 2 by each thickness.
But when by each thickness plastics 2 being carried out sorting, it is difficult that the thickness of plastics 2 is measured sorting, is inappropriate for a large amount of processing.According to this embodiment, charged through corresponding to positively charged plastics 21 changes the whereabouts track of the positively charged plastics 21 that fall in fall area 7 by electrod assembly 3, can reclaim thick plastics 21a and thin plastics 21b respectively.That is, in this embodiment, do not carry out sorting because do not detect the thickness ground of plastics 2, so separating plastic 2 in large quantities.
In addition, according to this embodiment, set the position of demarcation strip 4a based on a reference value between the Unit Weight electric charge mean value of Unit Weight electric charge mean value that is set in thick plastics 21a and thin plastics 21b.For this reason, can be of the returnable of separating by demarcation strip 4a 4 regional 4b reclaim the thick plastics 21a of the not enough a reference value of Unit Weight electric charge mean value, reclaim the thin plastics 21b that Unit Weight electric charge mean value surpasses a reference value at another regional 4c.
In addition, according to this embodiment, positively charged plastics 21 are ABS resins, and the thickness of the thick plastics 21a in the positively charged plastics 21 is more than the 2mm, and the thickness of thin plastics 21b is below the 1mm.For this reason, through reclaiming thick plastics 21a and thin plastics 21b respectively, can be divided into thickness 2mm above from the ABS resin sheet of injection grade and below the thickness 1mm from the ABS resin sheet of extruding grade.Like this, the ABS resin sheet that sub-elects can be used in the injection grade once more again and extrude the same use in the grade.
(embodiment 2)
Method of separating plastic to embodiment 2 of the present invention describes.The method of separating plastic of this embodiment is applicable to carrying out the situation of sorting by difference in thickness by the plastics after the breed difference sorting.At first, the plastic Separator to this embodiment describes.
With reference to Fig. 2, plastic Separator 1 is the device that is used for the charged plastics of sorting 2.Below, to describing according to the situation that thickness carries out sorting, so plastics 2 comprise positively charged plastics 21 as one of charged plastics 2 routine positively charged plastics 21.In addition, when electronegative plastics 22 were carried out sorting according to thickness, plastics 2 comprised electronegative plastics 22.In addition, positively charged plastics 21 can be ABS resins.At this moment, the thickness of the thick plastics 21a in the positively charged plastics 21 can be more than the 2mm, and the thickness of thin plastics 21b can be below the 1mm.
Plastic Separator 1 mainly has electrod assembly 3, returnable 4, first transfer unit 11, second transfer unit 12 and power supply 13.
In addition, the formation in addition of this embodiment is because identical with above-mentioned embodiment 1, so, give identical Reference numeral to identical part, and do not repeat explanation.
Then, the method for separating plastic to the plastic Separator 1 that uses this embodiment describes.
With reference to Fig. 2, the plastics 2 that had the identical polar electricity by frictional electrification are carried out sorting.These charged plastics 2 are positively charged plastics 21.This positively charged plastics 21 are applicable does not for example establish demarcation strip 4a and the positively charged plastics 21 that reclaimed by ground connection side returnable 41 in embodiment 1.
The plastics 21a of the thicker in the positively charged plastics 21 of positively charged and the plastics 21b of thin thickness are loaded under the state of second transfer unit 12, are carried by second transfer unit 12 arrow D2 direction in figure.
Through on electrod assembly 3, applying voltage by power supply 13, thick plastics 21a is mentioned and is adsorbed to first transfer unit 11 of the top that is disposed at second transfer unit 12 with the thin plastics 21b quilt among the plastics 21b that approaches.At this moment, thin plastics 21b is mentioned to the rightabout of gravity by electrod assembly 3.
Have the thin plastics 21b of the above electric charge mean value of a reference value between the Unit Weight electric charge mean value of the Unit Weight electric charge mean value that is set in thick plastics 21a and thin plastics 21b, also can mention and adsorb to first transfer unit 11 by electrod assembly 3.
For example when positively charged plastics 21 are ABS resin; Through applying voltage so that the electric-field intensity of electrod assembly 3 directions on second transfer unit 12 becomes 250kV/m, mention the ABS resin sheet of the Unit Weight electric charge mean value of a reference value 40nC/g that surpasses the ABS resin sheet and adsorb to first transfer unit 11 by 13 pairs of electrod assemblies 3 of power supply.
Therefore, Unit Weight electric charge mean value thin plastics (ABS resin sheet) 21b that is roughly 50nC/g is mentioned and is adsorbed to first transfer unit 11.The thickness of plastics (ABS resin sheet) 21b that should be thin is below the 1mm.For this reason, adsorb by first transfer unit 11 from thin plastics (ABS resin sheet) 21b that extrudes grade.
On the other hand, thick plastics (ABS resin sheet) 21a that Unit Weight electric charge mean value is roughly 20nC/g does not mention and adsorbs to first transfer unit 11, but is transferred keeping being loaded under the state on second transfer unit 12.The thickness of these thick plastics (ABS resin sheet) 21a is about 2mm.For this reason, do not mentioned and adsorbed from thick plastics (ABS resin sheet) 21a that injects grade, but under the state that is loaded on second transfer unit 12, be transferred to first transfer unit 11.
By the electrod assembly 3 of a side that is configured in first transfer unit 11, at the thin plastics 21b of opposite side absorption of first transfer unit 11.Under this state, thin plastics 21b is carried by first transfer unit 11 arrow D1 direction in figure.Thin plastics 21b with the above electric charge mean value of a reference value also can carry out the conveying that formed by first transfer unit 11 under the state of the opposite side that is adsorbed on first transfer unit 11 by electrod assembly 3.
Then, the action effect to this embodiment describes.
According to this embodiment, can be corresponding to positively charged plastics 21 charged, under the state that is adsorbed on positively charged plastics 21 by electrod assembly 3 first transfer unit 11, carry, make it come off and reclaim from first transfer unit 11.For this reason, can suppress the influence that the shape because of plastics 2 causes, plastics 2 carried out sorting by each thickness.
In addition,, can under the state that is adsorbed on first transfer unit 11 by electrod assembly 3, carry charged plastics 2, make it come off and reclaim from first transfer unit 11 by first transfer unit 11 according to this embodiment.That is, in this embodiment, do not carry out sorting because do not measure the thickness of plastics 2, so separating plastic 2 in a large number.
In addition, according to this embodiment, mention and adsorb to first transfer unit 11 that is disposed at second transfer unit, 12 tops by electrod assembly 3 by the thin plastics 21b among second transfer unit 12 thick plastics 21a that carries and the plastics 21b that approaches.
At this moment, thin plastics 21b is mentioned towards first transfer unit 11 that is configured in second transfer unit, 12 tops to the rightabout of gravity by electrod assembly 3.Thick plastics 21a is big because of weight, thus be difficult to mention to the rightabout of gravity, and thin plastics 21b is because weight is little, so mention to the rightabout of gravity easily.For this reason, on first transfer unit 11 easily realization do not mention thick plastics 21a and mention the formation of thin plastics 21b.Thus, can on first transfer unit 11, mention thin plastics 21b accurately.
In addition; According to this embodiment; Have the thin plastics 21b of the above electric charge mean value of a reference value between the Unit Weight electric charge mean value of the Unit Weight electric charge mean value that is set in thick plastics 21a and thin plastics 21b, under the state of the opposite side that is adsorbed on first transfer unit 11 by electrod assembly 3, carry.Through being adsorbed onto first transfer unit 11 to thin plastics 21b, can thin plastics 21b and thick plastics 21a sorting being opened and carried with the electric charge mean value more than a reference value by electrod assembly 3.
In addition, according to this embodiment, positively charged plastics 21 are ABS resins, and the thickness of the thick plastics 21a of positively charged plastics 21 is more than the 2mm, and the thickness of thin plastics 21b is below the 1mm.Thus, through sorting and reclaim more than the thickness 2mm from the ABS resin sheet of injection grade with below the thickness 1mm from the ABS resin sheet of extruding grade, can be used in again once more and inject grade and extrude the same use in the grade.
(embodiment 3)
The method of separating plastic of embodiment 3 of the present invention is compared with the method for separating plastic of embodiment 2, mainly is that the configuration of first transfer unit is different.The method of separating plastic of this embodiment is applicable to carrying out the situation of sorting by difference in thickness by the plastics after the breed difference sorting.Below, the method for separating plastic of this embodiment is described.
With reference to Fig. 3, second transfer unit 12 is configured to see from gravity direction not overlapping with first transfer unit 11.See the space that the charged plastics 2 of configuration can fall between first transfer unit 11 and second transfer unit 12 from gravity direction.First transfer unit 11 is configured to attract and to adsorb by 12 conveyings of second transfer unit thin plastics 21b from second transfer unit 12 thick plastics 21a that falls and the plastics 21b that approaches.
The plastics 21a of the thicker in the positively charged plastics 21 of band identical polar electricity and the plastics 21b of thin thickness carry with the state arrow D2 direction in figure that is loaded into second transfer unit 12.As thick plastics 21a when arrow D2 direction is transported to the end of second transfer unit 12 in the drawings with thin plastics 21b, thick plastics 21a and thin plastics 21b fall from the end of second transfer unit 12.
After thick plastics 21a and thin plastics 21b fell from the end of second transfer unit 12, thin plastics 21b was attracted and absorption with second transfer unit, the 12 first overlapping transfer units 11 to being configured to not see from gravity direction by electrod assembly 3.At this moment, thin plastics 21b drops to the space between second transfer unit 12 and first transfer unit 11, is attracted to first transfer unit 11 simultaneously.
Have the thin plastics 21b of the above electric charge mean value of a reference value between the Unit Weight electric charge mean value of the Unit Weight electric charge mean value that is set in thick plastics 21a and thin plastics 21b, also can attract and absorption to first transfer unit 11 by electrod assembly 3.
Come off and reclaim from first transfer unit 11 by the thin plastics 21b of first transfer unit 11 absorption by returnable 4.On the other hand, thick plastics 21a is not adsorbed by first transfer unit 11, and between first transfer unit 11 and second transfer unit 12, falls.
In addition, formation in addition of this embodiment and method be because identical with above-mentioned embodiment 2, thus give identical Reference numeral to identical part, and do not repeat explanation.
According to this embodiment, from 12 times backwardnesss of second transfer unit, thin plastics 21a is attracted and absorption with second transfer unit, the 12 first overlapping transfer units 11 to seeing from gravity direction by electrod assembly at thick plastics 21a and thin plastics 21b.
At this moment, the space of thin plastics 21b between second transfer unit 12 and first transfer unit 11 falls, and attracted to first transfer unit 11 by electrod assembly 3 simultaneously.The amount of movement of the horizontal direction of thin plastics 21b is bigger than the amount of movement of the horizontal direction of thick plastics 21a.For this reason, can realize not making thick plastics 21a to make the formation of thin plastics 21b absorption to 11 absorption of first transfer unit easily.Thus, can thin plastics 21b be adsorbed in first transfer unit 11 accurately.
(embodiment 4)
The method of separating plastic of embodiment 4 of the present invention is compared with the method for separating plastic of embodiment 2, and main not being both do not have the second transfer unit this point.The method of separating plastic of this embodiment is applicable to carrying out the situation of sorting by difference in thickness by the plastics after the breed difference sorting.Below, the method for separating plastic of this embodiment is described.
With reference to Fig. 4, plastic Separator 1 mainly has electrod assembly 3, returnable 4, first transfer unit 11 and power supply 13.
Positively charged plastics 21 are loaded into the upper surface side of first transfer unit 11.The plastics 21b of plastics 21a and thin thickness of thicker of positively charged plastics 21 that has an identical polar electricity under the state that is loaded into first transfer unit, 11 upper surface side by first transfer unit 11 in the drawings arrow D1 direction towards an end conveying.
In an end of first transfer unit 11, when upper surface side was transported to lower face side, thick plastics 21a fell from upper surface side at thick plastics 21a and thin plastics 21b.Thin plastics 21b under the state of the lower face side that is adsorbed onto first transfer unit 11 by electrod assembly 3 by first transfer unit 11 in the drawings arrow D2 direction carry towards the other end.
The thin absorption 21b of lower face side that is adsorbed on first transfer unit comes off and is reclaimed by returnable 4 from the lower face side of first transfer unit 11 in the other end.
In addition, the formation in addition of this embodiment is because identical with above-mentioned embodiment 2, thus give identical Reference numeral to identical part, and do not repeat explanation.
According to this embodiment; Thick plastics 21a and thin plastics 21b are transferred under the state of the upper surface side that is loaded into first transfer unit 11; When upper surface side is transported to lower face side; Thick plastics 21a falls from upper surface side, and thin plastics 21b carries with the state that is adsorbed on lower face side.
When the upper surface side of first transfer unit 11 was transported to lower face side, the thick plastics 21a that weight is big fell from upper surface side at positively charged plastics 21, and the thin plastics 21b that weight is little is adsorbed on the lower face side of first transfer unit 11.The lower face side that for this reason, can be implemented in first transfer unit 11 is not easily adsorbed thick plastics 21a and the formation of the thin plastics 21b of absorption.Thus, can the thin plastics 21b of high accuracy absorption on first transfer unit 11.
In addition; Because carry thick plastics 21a and thin plastics 21b, and can the thick plastics 21a and thin plastics 21b of sorting, also can not be provided for carrying the other transfer unit of thick plastics 21a and thin plastics 21b by first transfer unit 11; So, can realize saving the space.In addition, because other transfer unit can be set, so, can improve the productivity ratio that comprises production cost.
(embodiment 5)
The method of separating plastic of embodiment 5 of the present invention is compared with the method for separating plastic of embodiment 1, main charged plastics, returnable and the Charging system of not being both.The method of separating plastic of this embodiment is applicable to carrying out the situation of sorting by difference in thickness by the plastics after the breed difference sorting.Below, the method for separating plastic of this embodiment is described.
With reference to Fig. 5, the charged plastics 2 of this embodiment are different with embodiment 1, are a kind of of positively charged plastics 21.Below, the situation according to thickness sorting positively charged plastics 21 is described, but also can be according to the electronegative plastics 22 of thickness sorting.At this moment, charged plastics 2 become electronegative plastics 22.
Charging system 51 is made up of the material that has through the friction with the plastics 2 that drop into plastics 2 different polarities electricity.In this embodiment, because charged plastics 2 are positively charged plastics 21, so Charging system 51 is by through electronegative material constitutes with the friction of positively charged plastics 21.Charging system 51 constitutes and can supply to fall area 7 to positively charged plastics 21.
Through in Charging system 51 in figure arrow R1 direction rotate and stir positively charged plastics 21, Charging system 51 rubs with positively charged plastics 21.Through Charging system 51 and 21 frictions of positively charged plastics, Charging system 51 is electronegative.The positively charged plastics 21 of positively charged on transfer unit 6 through and supply to fall area 7.
Make the whereabouts orbit transfer of the charged positively charged plastics 21 that fall in fall area 7 by earth electrode 3a and positive electrode 3b.Thick plastics 21a in the positively charged plastics 21 of whereabouts orbit transfer is reclaimed by a regional 4b of returnable 4 (ground connection side returnable 41), and thin plastics 21b is reclaimed by another regional 4c of returnable 4 (ground connection side returnable 41).
Then, an example of the method for separating plastic of this embodiment is explained in more detail.
At positively charged plastics 21 is under the situation of ABS resin, and Charging system 51 can be made up of PS resin or PP resin.At this moment, when positively charged plastics 21 were dropped in the Charging systems 51 and are stirred, the inwall of Charging system 51 became friction media, positively charged plastics 21 positively chargeds that are made up of ABS resin.
The positively charged plastics 21 that are made up of ABS resin supply to fall area 7 from Charging system 51 via transfer unit 6.Positively charged plastics 21 receive electrostatic force through earth electrode 3a and positive electrode 3b and are reclaimed by returnable 4 in the way, whereabouts of fall area 7.Corresponding through being adjusted to the position of demarcation strip 4a with Unit Weight charge reference value 40nC/g; Same with embodiment 1, positively charged plastics 21 can divide elect as about thickness 2mm from the injection grade the ABS resin sheet and below the thickness 1mm from the ABS resin sheet of extruding grade.
In addition, formation in addition of this embodiment and method be because identical with above-mentioned embodiment 1, thus give identical Reference numeral to identical part, and do not repeat explanation.
According to this embodiment, because make Charging system 51 and plastics 2 frictions, make plastics 2 have the electricity with Charging system 51 opposed polarities, so after carrying out electrostatic separation by kind, plastics that can be through making quantity of electric charge decay 2 are charged to carry out sorting by each thickness.In addition, also can be charged to the plastics 2 that carried out sorting by kind with the method beyond the electrostatic separation, carry out sorting by each thickness.
(embodiment 6)
The method of separating plastic of embodiment 6 of the present invention is compared with the method for separating plastic of embodiment 2, mainly has difference on the Charging system this point.
With reference to Fig. 6, Charging system 51 is by constituting through having with the electric material of plastics 2 opposed polarities with the plastics that drop into 2 frictions.In this embodiment, because charged plastics 2 are positively charged plastics 21, so Charging system 51 is by electronegative material constitutes through rubbing with positively charged plastics 21.Charging system 51 constitutes and can supply to second transfer unit 12 to positively charged plastics 21.
Through in Charging system 51 in figure arrow R1 direction rotate and stir positively charged plastics 21, Charging system 51 rubs with positively charged plastics 21.Through Charging system 51 and 21 frictions of positively charged plastics, Charging system 51 is electronegative.The positively charged plastics 21 of positively charged supply to second transfer unit 12 from Charging system 51.
Then, an example of the method for separating plastic of this embodiment is explained in more detail.
At positively charged plastics 21 is under the situation of ABS resin, and Charging system 51 can be made up of PS resin or PP resin.When dropping into positively charged plastics 21 in the Charging systems 51 and stirring, the inwall of Charging system 51 becomes friction media, positively charged plastics 21 positively chargeds that are made up of ABS resin.The positively charged plastics 21 that are made up of ABS resin supply on second transfer unit 12 from Charging system 51.Positively charged plastics 21 are being carried by second transfer unit 12 arrow D2 direction in figure under the state that is loaded into second transfer unit 12.
Through applying voltage with 13 pairs of electrod assemblies 3 of power supply; So that the electric-field intensity of electrod assembly 3 directions on second transfer unit 12 becomes 250kV/m; To mention and adsorb to first transfer unit 11 above the ABS resin sheet of the Unit Weight electric charge mean value of a reference value 40nC/g of ABS resin sheet, under the state that is attached at first transfer unit 11, carry and be recovered to returnable 4.Like this, positively charged plastics 21 can divide elect as about thickness 2mm from the injection grade the ABS resin sheet and below the thickness 1mm from the ABS resin sheet of extruding grade.
In addition, formation in addition of this embodiment and method be because identical with above-mentioned embodiment 2, thus give identical Reference numeral to identical part, and do not repeat explanation.
According to this embodiment, because make Charging system 51 and plastics 2 frictions, make plastics 2 have the electricity with Charging system 51 opposed polarities, so, undertaken behind the electrostatic separation by kind, can make that the plastics 2 of quantity of electric charge decay are charged to carry out sorting by each thickness.In addition, also can be charged to the plastics 2 that carried out sorting by kind with the method beyond the electrostatic separation, carry out sorting by each thickness.
(embodiment 7)
The method of separating plastic of embodiment 7 of the present invention is compared with the method for separating plastic of embodiment 3, mainly has difference on the Charging system this point.This Charging system is identical with the Charging system of embodiment 6.
With reference to Fig. 7; According to this embodiment,, make plastics 2 have with Charging system 51 opposed polarities because make Charging system 51 and plastics 2 frictions equally with embodiment 6; So; Undertaken behind the electrostatic separation by kind, can be charged through the plastics 2 that make quantity of electric charge decay, carry out sorting by each thickness.In addition, also can be charged to the plastics 2 that carried out sorting by kind with the method beyond the electrostatic separation, carry out sorting by each thickness.
(embodiment 8)
The method of separating plastic of embodiment 8 of the present invention is compared with the method for separating plastic of embodiment 4, mainly has difference on the Charging system this point.This Charging system is identical with the Charging system of embodiment 6.
With reference to Fig. 8, through in Charging system 51 in figure arrow R1 direction rotate and stir positively charged plastics 21, Charging system 51 rubs with positively charged plastics 21.Through Charging system 51 and 21 frictions of positively charged plastics, the positively charged plastics 21 of positively charged supply to the upper surface side of first transfer unit 11 from Charging system 51.
According to this embodiment,, make plastics 2 have with Charging system 51 opposed polarities because make Charging system 51 and plastics 2 frictions equally with embodiment 6; So; Undertaken behind the electrostatic separation by kind, can be charged through the plastics 2 that make quantity of electric charge decay, carry out sorting by each thickness.In addition, also can be charged to the plastics 2 that carried out sorting by kind with the method beyond the electrostatic separation, carry out sorting by each thickness.
Each above-mentioned embodiment can suitably make up.
The present invention has been carried out detailed explanation and represented, but this is an example, can not become qualification, should be expressly understood that scope of invention explained by claims.
Claims (13)
1. a method of separating plastic is used for the congener plastics that sorting has the identical polar electricity, it is characterized in that possessing following operation:
Separate plastics and the plastics of not enough said a reference value more than the said a reference value based on a reference value, this a reference value is set between the Unit Weight electric charge mean value of plastics of Unit Weight electric charge mean value and thin thickness of plastics of the thicker in the said plastics.
2. method of separating plastic as claimed in claim 1 is characterized in that, possesses following operation:
Through at least one electrod assembly of facing with the fall area that is used to make the said congener plastics that have the identical polar electricity to fall, change the whereabouts track of the said plastics that fall in said fall area;
The plastics of said thicker and the plastics recovery of said thin thickness are arrived returnable; This returnable is disposed at the below of said fall area and is provided with a recovery zone and another recovery zone of setting based on said a reference value; At this moment; The plastics more than the said a reference value are reclaimed in said another recovery zone in said returnable, reclaim the plastics of not enough said a reference value in a said recovery zone.
3. according to claim 1 or claim 2 method of separating plastic is characterized in that, and then possesses following operation:
Make Charging system and said plastic friction; This Charging system supplies to said fall area by constituting through having with the electric material of said plastics opposed polarity with the said congener plastic friction that has the identical polar electricity, will having with the electric said plastics of said Charging system opposed polarity.
4. method of separating plastic as claimed in claim 1 is characterized in that, possesses following operation:
At side configured electrodes parts of transfer unit, carry the said congener plastics that have the identical polar electricity with the state that adsorbs by said electrod assembly with said transfer unit at the opposite side of said transfer unit;
Make the side in the plastics of above plastics of said a reference value or not enough said a reference value come off and it is reclaimed from said transfer unit.
5. method of separating plastic as claimed in claim 1 is characterized in that, possesses following operation:
Carry the said congener plastics that have the identical polar electricity by transfer unit;
Adsorb the side in the plastics of plastics or not enough said a reference value more than the said a reference value by the electrod assembly that is configured in said transfer unit top.
6. like claim 4 or 5 described method of separating plastic, it is characterized in that, and then possess following operation:
Make Charging system and said plastic friction, this Charging system supplies to said transfer unit by constituting through having with the electric material of said plastics opposed polarity with said plastic friction, will having with the electric said plastics of said Charging system opposed polarity.
7. method of separating plastic as claimed in claim 1 is characterized in that said plastics are ABS resins,
The thickness of said thick plastics is more than the 2mm,
The thickness of said thin plastics is below the 1mm.
8. a plastic Separator is used for the congener plastics that sorting has the identical polar electricity, it is characterized in that possessing:
At least one electrod assembly, this electrod assembly is faced with the fall area that is used to charged said plastics are fallen; With
Returnable; This returnable is configured in the below of said fall area and has demarcation strip; This demarcation strip is separated a zone and another zone based on a reference value desired location; This a reference value is set between the Unit Weight electric charge mean value of plastics of Unit Weight electric charge mean value and thin thickness of plastics of the thicker in the said plastics; And the plastics recovery that this returnable can be above with the said a reference value in the said plastics that have identical polar electricity is in said another zone, with the plastics recovery of the said a reference value of deficiency in a said zone.
9. plastic Separator as claimed in claim 8 is characterized in that, also possesses Charging system, and this Charging system is by constituting through having with the electric material of said plastics opposed polarity with said plastic friction;
Said Charging system constitutes, can be with supplying to said fall area through having with the electric said plastics of said Charging system opposed polarity with said plastic friction.
10. a plastic Separator is used for the congener plastics that sorting has the identical polar electricity, it is characterized in that possessing:
Transfer unit, this transfer unit are used to carry charged said plastics;
Electrod assembly, this electrod assembly are configured in a side of said transfer unit, can charged said plastics be adsorbed on the opposite side of said transfer unit; With
Returnable, this returnable can make the side in the plastics of above plastics of the said a reference value among the said plastics that are attracted on the said transfer unit or not enough said a reference value come off from said transfer unit, and reclaim.
11. plastic Separator; Be used for the congener plastics that sorting has the identical polar electricity; It is characterized in that; Possess transfer unit and electrod assembly, this electrod assembly is configured in the top of said transfer unit, is adsorbed on the side in the plastics of above plastics of said a reference value among the said plastics of carrying on the said transfer unit or not enough said a reference value.
12. like claim 10 or 11 described plastic Separators, it is characterized in that also possessing Charging system, this Charging system is by constituting through having with the electric material of said plastics opposed polarity with said plastic friction;
Said Charging system constitutes, can be with supplying to said transfer unit through having with the electric said plastics of said Charging system opposed polarity with said plastic friction.
13. like each described plastic Separator in the claim 8～11, it is characterized in that said plastics are ABS resins,
The thickness of said thick plastics is more than the 2mm,
The thickness of said thin plastics is below the 1mm.
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| JP2010-263314 | 2010-11-26 | ||
| JP2010263314A JP5412409B2 (en) | 2010-11-26 | 2010-11-26 | Plastic sorting method and plastic sorting apparatus |
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| JP5412409B2 (en) | 2014-02-12 |
| JP2012110855A (en) | 2012-06-14 |
| CN102476073B (en) | 2015-09-30 |
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