CN101448574A

CN101448574A - Squeezing roller and rotary drum-type magnetic separator

Info

Publication number: CN101448574A
Application number: CNA2007800183918A
Authority: CN
Inventors: 宫川和彦; 西泽信也
Original assignee: Sumitomo Heavy Industries Finetech Ltd
Current assignee: Sumitomo Heavy Industries Finetech Ltd
Priority date: 2006-05-30
Filing date: 2007-05-18
Publication date: 2009-06-03
Anticipated expiration: 2027-05-18
Also published as: JPWO2007138891A1; KR20090016555A; JP4229978B2; KR101243656B1; WO2007138891A1; CN101448574B

Abstract

This invention provides a rotary drum-type magnetic separator, which can satisfactorily squeeze a liquid contained in sludge without striking the sludge into the squeezing roller even when the sludge has such a shape that is likely to be striken into the squeezing roller, and a squeezing roller for use in the separator. The separator comprises a squeezing roller (6) which is abutted against a rotary drum (3) and is rotated about a shaft substantially parallel to the rotating shaft of the rotary drum (3). The rotary drum (3) has a built-in and fixed internal cylinder (5) on which a plurality of magnets (4), (4), are disposed. An external cylinder (9) formed of a nonmagnetic material is rotated on the circumference of the internal cylinder (5). An elastic body is disposed on the squeezing roller (6) in its face abutted against the rotary drum (3). The elastic body is formed of an uncrosslinked polyurethane material composed mainly of a polyester polyol. A suppressing member for suppressing the deformation of the elastic body is provided on both ends of the squeezing roller (6).

Description

Pressure roller and rotary drum-type magnetic separating device

Technical field

The present invention relates to a kind of trickle residue (スラ Star ジ) rotary drum-type magnetic separating device that reclaims and pressure roller that is used for this device to containing in the cooling fluid.

Background technology

At metal material, particularly be in the machining, grinding etc. of the magnetic material of representative with the ferrous materials, make the cutting swarf of discharging, cut powder etc. with fluid separation applications and reclaim with cooling fluid.Owing to cutting swarf, cut powder etc. and have various shapes, install so have various magnetic to separate (recoverys) from the viewpoint exploitation of organic efficiency.

For example, be powdery owing to be called as the powder of cutting of residue, also contain liquid easily so concentrate easily.Therefore, separate reclaiming becoming difficulty, is to have the fluidity of removing of good trickle residue (liquid is cut so require magnetic separating device

Property) device.

Shown in patent documentation 1, rotary drum-type magnetic separating device in the past is to be provided with the liquid storing part 2 that stores cooling fluid in the main body 1 of box.With with liquid storing part 2 modes divided into two parts, near the central portion of main body 1, be supported with swing roller 3 along the general horizontal direction axle.Swing roller 3 cylinder, and be fixed with inner core 5 in the inside of urceolus coaxially, this inner core 5 for constituting by nonmagnetic substances such as stainless steels on outer peripheral face with predetermined alignment arrangements have a plurality of

magnet

4,4 ...A plurality of

magnet

4,4 ... polarity be configured to, near the outer peripheral face of swing roller 3, produce predetermined magnetic flux, so that the cutting swarf that can the magnetic cooling fluid contains, cut powder etc.

In patent documentation 1, constitute, be immersed in from swing roller 3 liquid storing part 2 part to the top, promptly be equivalent to swing roller 3 peripheries roughly on 3/4ths the corresponding inner core 5 of part, dispose a plurality of

magnet

4,4 ...Be equivalent to remaining roughly 1/4th part, distributed

magnet

4,4 do not arranged on inner core 5 ..., do not act on magnetic force.

By

magnet

4,4 ... magnetic force and be attracted to residue on the outer peripheral face of swing roller 3 in the bottom of liquid storing part 2, quilt is to the conveyance of the top of swing roller 3 along with the rotation of swing roller 3, the moment of having passed through the top lose

magnet

4,4 ... absorption affinity, and get and reclaim residue by scraping with the scraper plate 7 of swing roller 3 butts.Dispose pressure roller 6 near the top of swing roller 3, this pressure roller 6 disposes elastomers such as rubber from the teeth outwards, and by the predetermined outer peripheral face butt of pushing with swing roller 3.Adsorbed residue squeezes out the liquid that residue contains thus, and only separates cutting swarf, cuts powder etc. in the inaccessible position of magnetic force by between swing roller 3 and the pressure roller 6.

Patent documentation 1: TOHKEMY 2000-079353 communique

But the problem that exists in patent documentation 1 is, scrapes when getting residue at scraper plate 7, also scrapes the liquid of having got swing roller 3 surfaces with residue, and the residue that is reclaimed becomes the state that contains liquid.Particularly be easier to reduce, become the state that liquid is not adequately compressed out easily at the both ends of pressure roller 6 extruding efficient ratio.Therefore, also have following problem: near scraper plate 7, the liquid residual at both ends is drawn by residue once more, and the liquid that removes of the residue of separation becomes insufficient.

And, not not equal according to the difference of grinding processing method, the difference that is ground material, combination, the shape of residue is also varied.For example, residue is shaped as curling shape, needle-like, powdery etc., and the size of residue also is to counting the various of μ m from number mm.And, be to penetrate easily under the situation of shape of pressure roller 6, having problems is, because use repeatedly and form the residue ring of ring-type on pressure roller 6, the maintenance times such as replacing of pressure roller 6 increase thus.

And the residue that produces in recent years accurate grinding processing, for example longitudinal grinding processing, trim process, honing processing, attrition process etc. has the tendency of ultra micro granulation.And, use the situation of the high oiliness cooling fluid of ratio of viscosities water also more, from the residue of ultra micro granulation, separate cooling fluid reliably and become more and more difficult.

Summary of the invention

The present invention In view of the foregoing carries out, its purpose is the pressure roller that a kind of rotary drum-type magnetic separating device is provided and is used for this device, even the shape of residue is the shape that penetrates pressure roller easily, can penetrate pressure roller yet and separate residue steadily in the long term.

And the pressure roller that the object of the present invention is to provide a kind of rotary drum-type magnetic separating device and be used for this device even the residue of ultra micro granulation also can fully squeeze out the liquid that residue contains, and can separate residue reliably.

In order to reach above-mentioned purpose, the pressure roller of the 1st invention is the pressure roller that is used for the rotary drum-type magnetic separating device, this pressure roller with the axle with the rotating shaft almost parallel of swing roller be the center rotation and with this swing roller butt; This swing roller is, the built-in inner core that disposes a plurality of magnet, the urceolus rotation around this inner core that is fixed that is made of nonmagnetic substance; Being characterized as of this pressure roller, with the face of above-mentioned swing roller butt on dispose elastomer, this elastomer is made of the uncrosslinked polyurethane material that with the PEPA is main component.

In the 1st invention, this pressure roller is set to, with the axle with the rotating shaft almost parallel of swing roller be the center rotation and with this swing roller butt; This swing roller is, the built-in inner core that disposes a plurality of magnet, the urceolus rotation around this inner core that is fixed that is made of nonmagnetic substance.With the face of swing roller butt on dispose elastomer, this elastomer is made of the uncrosslinked polyurethane material that with the PEPA is main component.Under the situation of using common polyurethane material, because the liquid that residue contains and produce hydrolysis at surface of elastomer is unable to undergo the use as pressure roller.By using uncrosslinked polyurethane material, can possibly avoid producing hydrolysis, can guarantee durability as pressure roller.

And owing to the distinctive character of polyurethane material, be the hardness height, though the less tearing strength that therefore stretches is higher, even therefore under the situation that is shaped as the shape that needle-like etc. penetrates easily of residue, residue also is difficult to penetrate pressure roller.Therefore,, also can suppress residue and penetrate pressure roller, can carry out liquid extruding steady in a long-term even for example under the situation of residue that is trickle needle-like.

And being characterized as of the pressure roller of the 2nd invention in the 1st invention, possesses the above-mentioned elastomer of inhibition to axially movable inhibition parts at both ends.

In the 2nd invention, possesses the above-mentioned elastomer of inhibition to axially movable inhibition parts at both ends.By the inhibition parts are set, do not produce portion's of withdrawing from (escaping げ portion) and do not produce the leakage at both ends; These inhibition parts are, since swing roller and pressure roller butt and elastomer produce to the both ends side withdraw from portion the time, with do not produce this mode that withdraws from portion suppress elastomer from both end sides to moving axially.Therefore, can carry out the liquid that removes of residue fully, and can easily separate the recovery residue.

Then, in order to reach above-mentioned purpose, being characterized as of the rotary drum-type magnetic separating device of the 3rd invention possesses above-mentioned pressure roller.

In the 3rd invention, invent and/or the 2nd pressure roller of inventing by possessing the 1st, and use uncrosslinked polyurethane material as elastomeric material, hydrolysis can be possibly avoided producing thus, and durability can be guaranteed as pressure roller.And owing to the distinctive character of polyurethane material, be the hardness height, though the less tearing strength that therefore stretches is higher, even therefore under the situation that is shaped as the shape that needle-like etc. penetrates easily of residue, residue also is difficult to penetrate pressure roller.Therefore,, also can suppress residue and penetrate pressure roller, can carry out liquid extruding steady in a long-term even for example under the situation of residue that is trickle needle-like.

And, being characterized as of rotary drum-type magnetic separating device of the 4th invention, in the 3rd invention, the side face of above-mentioned swing roller is level and smooth minute surface.

In the 4th invention, be processed as level and smooth minute surface by side face, even under the situation that is shaped as the shape that needle-like etc. penetrates easily of residue, also be difficult on the surface of swing roller, keep erectility with swing roller.Therefore,, also can suppress residue and penetrate pressure roller, and can carry out liquid extruding steady in a long-term even for example under the situation of residue that is trickle needle-like.

And, being characterized as of the rotary drum-type magnetic separating device of the 5th invention, in the 3rd or the 4th invention, above-mentioned swing roller is on 3/4ths above-mentioned inner core side face roughly, configuration has a plurality of magnet row of identical polar annularly, and make in the polarity of axial a plurality of magnet row of disposed adjacent different, with the part of above-mentioned pressure roller butt near, dispose at least one row in the axial direction and have other a plurality of magnet with a plurality of above-mentioned magnet row opposite polarities.

In the 5th invention, on roughly 3/4ths the inner core side face of swing roller, configuration has a plurality of magnet row of identical polar annularly, and make in the polarity of axial a plurality of magnet row of disposed adjacent different.On the other hand, with the part of pressure roller butt near, dispose other magnet that at least one row have the opposite polarity polarity that has with above-mentioned magnet row in the axial direction.The residue of needle-like, higher along possibility upright on the normal direction of swing roller side face at the relative gap portion of the different magnet of polarity, the elastomeric possibility that penetrates pressure roller is higher.By with the part of pressure roller butt near, dispose other magnet row that at least one row have opposite polarity in the axial direction, thus along the side face magnetic at the residue of gap portion along the upright needle-like of the normal direction of swing roller side face, the elastomeric possibility that penetrates pressure roller reduces.Therefore,, also can on pressure roller, not form the residue ring of ring-type, can work as the rotary drum-type magnetic separating device of long-term stability owing to repeatedly using even residue is shaped as the shape that needle-like etc. penetrates pressure roller easily.

And, being characterized as of the rotary drum-type magnetic separating device of the 6th invention, in the 3rd or the 4th invention, above-mentioned swing roller and makes the polarity of a plurality of magnet row of disposed adjacent in a circumferential direction different on 3/4ths above-mentioned inner core side face roughly, dispose a plurality of a plurality of magnet row with identical polar in the axial direction.

In the 6th invention, on roughly 3/4ths the inner core side face of swing roller, dispose a plurality of a plurality of magnet row in the axial direction, and make the polarity of a plurality of magnet row of disposed adjacent in a circumferential direction different with identical polar.Owing on the direction of rotary drum rotating, dispose the different magnet of polarity continuously, so along the residue of the side face magnetic needle-like of swing roller, the elastomeric possibility that penetrates pressure roller reduces.Therefore,, also can on pressure roller, not form the residue ring of ring-type, can work as the rotary drum-type magnetic separating device of long-term stability owing to repeatedly using even residue is shaped as the shape that needle-like etc. penetrates pressure roller easily.

The effect of invention:

According to the 1st invention, by using uncrosslinked polyurethane material, can possibly avoid producing hydrolysis, can guarantee durability as pressure roller.And owing to the distinctive character of polyurethane material, be the hardness height, though the less tearing strength that therefore stretches is higher, even therefore under the situation that is shaped as the shape that needle-like etc. penetrates easily of residue, residue also is difficult to penetrate pressure roller.Therefore,, also can suppress residue and penetrate pressure roller, can carry out liquid extruding steady in a long-term even for example under the situation of residue that is trickle needle-like.

According to the 2nd invention,, do not produce the portion of withdrawing from and do not produce the leakage at both ends by the inhibition parts are set; These inhibition parts are, since swing roller and pressure roller butt and elastomer produce to the both ends side withdraw from portion the time, with do not produce this mode that withdraws from portion suppress elastomer from both end sides to moving axially.Therefore, can carry out the liquid that removes of residue fully, and can easily separate the recovery residue.

According to the 3rd invention, use uncrosslinked polyurethane material, hydrolysis can be possibly avoided producing thus, and durability can be guaranteed as pressure roller.And owing to the distinctive character of polyurethane material, be the hardness height, though the less tearing strength that therefore stretches is higher, even therefore under the situation that is shaped as the shape that needle-like etc. penetrates easily of residue, residue also is difficult to penetrate pressure roller.Therefore,, also can suppress residue and penetrate pressure roller, can carry out liquid extruding steady in a long-term even for example under the situation of residue that is trickle needle-like.

According to the 4th invention, even under the situation that is shaped as the shape that needle-like etc. penetrates easily of residue, also be difficult on the surface of swing roller, keep erectility, even for example under the situation of residue that is trickle needle-like, also can suppress residue and penetrate pressure roller, and can carry out liquid extruding steady in a long-term.

According to the 5th invention, by with the part of pressure roller butt near, dispose other magnet row that at least one row have opposite polarity in the axial direction, thus along the side face magnetic at the residue of gap portion along the upright needle-like of the normal direction of swing roller side face, the elastomeric possibility that penetrates pressure roller reduces.Therefore,, also can on pressure roller, not form the residue ring of ring-type, can work as the rotary drum-type magnetic separating device of long-term stability owing to repeatedly using even residue is shaped as the shape that needle-like etc. penetrates pressure roller easily.

According to the 6th invention, owing on the direction of rotary drum rotating, dispose the different magnet of polarity continuously, so along the residue of the side face magnetic needle-like of swing roller, the elastomeric possibility that penetrates pressure roller reduces.Therefore,, also can on pressure roller, not form the residue ring of ring-type, can work as the rotary drum-type magnetic separating device of long-term stability owing to repeatedly using even residue is shaped as the shape that needle-like etc. penetrates pressure roller easily.

Description of drawings

Fig. 1 be expression embodiment of the present invention 1 the rotary drum-type magnetic separating device formation, with the cutaway view of the face of the rotating shaft direct cross of swing roller.

Fig. 2 represents two views of the leakage state of the roller surface of rotary drum-type magnetic separating device in the past.

Fig. 3 is the cutaway view of face of rotating shaft that comprises the pressure roller of embodiment of the present invention 2.

Fig. 4 is the cutaway view and the front view of polar configurations of magnet of swing roller of the rotary drum-type magnetic separating device of expression embodiment of the present invention 3.

Fig. 5 is the cutaway view and the front view of polar configurations of magnet of swing roller of the rotary drum-type separator of expression embodiment of the present invention 4.

Symbol description:

2 liquid storing parts

3 swing rollers

4 magnet

5 inner cores

6 pressure rollers

8 elastomers

9 urceolus

The 10 side axle collars (inhibition parts)

11 mandrel rings (inhibition parts)

The specific embodiment

Below, according to accompanying drawing detailed description the present invention of expression embodiment.

(embodiment 1)

Fig. 1 be expression embodiment of the present invention 1 the rotary drum-type magnetic separating device formation, with the cutaway view of the face of the rotating shaft direct cross of swing roller.As shown in Figure 1, the rotary drum-type magnetic separating device of present embodiment 1 is to be provided with the liquid storing part 2 that stores cooling fluid in the main body 1 of box.With with liquid storing part 2 modes divided into two parts, near the central portion of main body 1, can be supported with swing roller 3 along the general horizontal direction axle rotatably.Swing roller 3 forms the cylinder that is made of nonmagnetic substances such as stainless steels, is fixed with inner core 5 coaxially in the inside of urceolus 9, on the outer peripheral face of this inner core 5 with predetermined alignment arrangements have a plurality of

magnet

4,4 ...A plurality of

magnet

In Fig. 1, constitute, be immersed in from swing roller 3 liquid storing part 2 part to the top, promptly be equivalent to swing roller 3 peripheries roughly on 3/4ths the corresponding inner core 5 of part, dispose a plurality of

magnet

4,4 ...Be equivalent to remaining roughly 1/4th part, on inner core 5, do not dispose

magnet

4,4 ..., do not act on magnetic force.

By

magnet

4,4 ... magnetic force and be attracted to residue on the outer peripheral face of swing roller 3 in the bottom of liquid storing part 2, along with the rotation of swing roller 3 by the top of conveyance to swing roller 3, the moment of having passed through the top lose

magnet

4,4 ... absorption affinity, get and reclaim residue by scraping with the scraper plate 7 of swing roller 3 butts.Dispose pressure roller 6 near the top of swing roller 3, this pressure roller 6 disposes elastomers such as rubber from the teeth outwards, and by the predetermined outer peripheral face butt of pushing with swing roller 3.Adsorbed residue squeezes out the liquid that residue contains thus, and only separates cutting swarf, cuts powder etc. in the inaccessible position of magnetic force by between swing roller 3 and the pressure roller 6.

In present embodiment 1,, use with the uncrosslinked polyurethane material of PEPA (Port リエステ Le オ-Le) as main component as being used for elastomer pressure roller 6 and bearing surface swing roller 3.In the past, under the situation of using the polyurethane material, owing to the hydrolysis attached to lip-deep liquid, elastomer damaged easily and was unable to undergo to use.Therefore, to be to use CR (neoprene) be that rubber, NBR (nitrile) are elastomers such as rubber to main flow.In the present invention, by uncrosslinked polyurethane material being used for suppress hydrolysis thus to contact the pressure roller 6 of the magnetic separating device that is prerequisite with liquid, and the performance material in the past good result that is difficult to obtain.

That is, so though, therefore have the character that the sword of cutter is difficult to penetrate because be that the comparison hard less tearing strength that stretches is stronger.Therefore, have trickle needle-like residue and be difficult to penetrate elastomer, the effect of liquid extruding steady in a long-term.

Specifically, constitute the rotary drum-type magnetic separating device by following structure.At first, side face for the swing roller 3 that constitutes by stainless steel, by being the nitrogenize heat treatment that keeps in 530 ℃, nitrogenous gas under 4 hours the condition in temperature, form the ferritic structure that thickness is 30 μ m on the top layer all sidedly, and set and become the surface roughness that needs.And, with the scraper plate 7 of swing roller 3 butts adopt with 1mm at interval punch inside diameter be the punch metal of the aperture of 0.5mm.

Carried out following experiment: the longitudinal grinding machinery (トラバ-スカ Star トマシ Application) that will use the CBN grinding tool is as grinding attachment, and reclaims the superfine residue from the oiliness cooling fluid of the grinding of having carried out the SCr steel.In this case, the cutting swarf of generation, to cut powder etc. fewer.

In the employed pressure roller 6 of the rotary drum-type magnetic separating device of present embodiment 1, using as hard is that the polyurethane PU of rubber is that rubber is as elastomer.Main component is uncrosslinked polyester polyurethane, and hardness is that (JIS-A) 58, tearing strength are that 33kg/cm, tensile strength are 231kg/m ², be stretched as 340%.For relatively, in the employed pressure roller 6 of rotary drum-type magnetic separating device in the past, using NBR respectively is that (hardness is 21 to rubber, tearing strength is 6kg/cm, tensile strength 36kg/m ², be stretched as 700%) as soft be rubber or to use CR be that (hardness is 61 to rubber, tearing strength is 120kg/m as 14kg/cm, tensile strength ², be stretched as 300%) be rubber as hard.

For the rotary drum-type magnetic separating device of present embodiment 1 and rotary drum-type magnetic separating device in the past, the oil content rate (weight %) that the residue that separate to reclaim from the oiliness cooling fluid of same amount after to machining under the same conditions by multi-pass operation contains is measured.In present embodiment 1, with used as soft be that the NBR of rubber is that the situation of rubber is compared, the oil content rate reduces by 14～15 weight %, be that the CR of rubber is that the situation of rubber is compared, the oil content rate reduces by 7～10 weight % with having used as hard.

And in order to compare with the employed pressure roller 6 of the rotary drum-type magnetic separating device of present embodiment 1, except above-mentioned CR was rubber, also using NBR was that (hardness is 60 to rubber, tearing strength is 156kg/m as 20kg/cm, tensile strength ², be stretched as 400%), be that the polyurethane (PU) of main component is that (hardness is 60 to rubber, tearing strength is that 30kg/cm, tensile strength are 315kg/m with crosslinked urethane prepolymer ², be stretched as 460%) be rubber as hard, and the aging of pressure roller 6 compared.

The treating capacity of having carried out making time per unit is that the result of identical operations is, is under the situation of rubber having used CR, after 2,3 months since penetrate pressure roller 6 surface of elastomer the superfine residue and integral body bleaches, the de-oiling rate of residue significantly descends.Being engraved in when identical and having used NBR is under the situation of rubber, with CR be that rubber phase lacks than the amount of penetrating of superfine residue.But the de-oiling rate of residue descends.On the other hand, be under the situation of rubber having used polyurethane, compare the amount of penetrating of superfine residue with any one situation and all lack, but because hydrolysis and can observe the deterioration of surface of elastomer, the de-oiling rate of residue descends.Relative with these, in the pressure roller 6 of present embodiment 1, almost do not observe penetrating of superfine residue, there is not the deterioration of surface of elastomer yet, the de-oiling rate of residue does not observe special variation.

Secondly, carried out following experiment: the longitudinal grinding machinery that will use the WA grinding tool is as grinding attachment, and reclaims trickle residue from the water-based cooling fluid of the grinding of having carried out the SK3 steel.In this case, the cutting swarf of generation, cut powder etc. amount many.

In the employed pressure roller 6 of the rotary drum-type magnetic separating device of present embodiment 1, use with above-mentioned same be that the polyurethane PU of rubber is that rubber is as elastomer as hard.Main component is uncrosslinked polyester polyurethane, and hardness is that (JIS-A) 58, tearing strength are that 33kg/cm, tensile strength are 231kg/m ², be stretched as 340%.Is that the CR of rubber is that (hardness is 61 to rubber, tearing strength is 120kg/m as 14kg/cm, tensile strength with having used above-mentioned as hard ², be stretched as 300%) situation, the moisture rate (weight %) that the residue that separate to reclaim is contained compares.

That is, make the rotary drum-type magnetic separating device of present embodiment 1 and rotary drum-type magnetic separating device in the past, carried out under the same conditions after the machining, from the water-based cooling fluid of same amount, separate and reclaimed residue.By multi-pass operation the moisture rate (weight %) that separate, the residue that reclaims contained is measured.As a result, in present embodiment 1, be that the CR of rubber is that the situation of rubber is compared with having used as hard, moisture rate has reduced by 1.0～1.2 weight %.

And, under the situation that the synchronous pressure of the rotation of the rotation of having carried out making pressure roller 6 and swing roller 3 drives, in present embodiment 1, be that the CR of rubber is that the situation of rubber is compared with having used as hard, moisture rate has reduced by 1.4～1.6 weight %.

As previously discussed, according to present embodiment 1, no matter be under the situation that reclaims the superfine residue from the oiliness cooling fluid, or reclaiming from the water-based cooling fluid under the situation of trickle residue, de-oiling (water) rate of residue is improved, also can improve the residue that produces from the grinding of cutter significantly, to the separation rate of recovery of the superfine residue that in trim process, honing processing, attrition process, microstoning etc., produces.Therefore, can be reduced in the amount of the oiliness cooling fluid that is discharged from the industrial waste processing, and can effectively apply flexibly as the recirculation resource separating the metal that reclaims.

(embodiment 2)

The formation of the rotary drum-type magnetic separating device of expression embodiment of the present invention 2, the same with embodiment 1 with the cutaway view of the face of the rotating shaft direction quadrature of swing roller, omit detailed explanation by giving the symbol identical with Fig. 1.The rotary drum-type magnetic separating device of present embodiment 2 and embodiment 1 different point is to possess the inhibition parts, and these inhibition parts suppress to be installed in the elastomer on pressure roller 6 surfaces to moving axially.

Fig. 2 is two views of leakage state of representing pressure roller 6 surfaces of rotary drum-type magnetic separating device in the past.Fig. 2 (a) expression is observed the pressure roller 6 of rotary drum-type magnetic separating device in the past and the side view of swing roller 3 from the rotating shaft direction, the pressure roller 6 of Fig. 2 (b) expression rotary drum-type magnetic separating device in the past and the front view of swing roller 3.

Shown in Fig. 2 (b), in rotary drum-type magnetic separating device in the past, on the bearing surface of pressure roller 6 and swing roller 3, produce

leakage portion

21,21 at the both ends of pressure roller 6.The size of

leakage portion

21,21 is according to the kind of the pressing force of the hardness of the elastomer 8 of the surface roughness of swing roller 3, pressure roller 6, pressure roller 6, rotating speed, cooling fluid etc. and different.

Its reason can be thought, on the bearing surface of pressure roller 6 and swing roller 3, owing to pressure roller 3 being pushed the pressure that the both ends that are endowed the elastomer 8 that makes pressure roller 3 are withdrawed from laterally, therefore at both ends, the pressing force of pressure roller 6 and swing roller 3 reduces and the liquid that is not extruded spills.Therefore, in present embodiment 2, as shown in Figure 3, possess the inhibition parts, these inhibition parts suppress to be installed in the elastomer 8 on pressure roller 6 surfaces to moving axially.

Fig. 3 is the cutaway view of face of rotating shaft that comprises the pressure roller 6 of embodiment of the present invention 2.In Fig. 3 (a), on the rotating shaft 12 of pressure roller 6, be fixed with as the side axle collar 10,10 that suppresses parts from the outside.By the side axle collar 10,10 is fixed in the mode that pushes relatively mutually from the both ends outsides, the two end portions that can suppress elastomer 8 thus withdraws from laterally, at both ends, the pressing force of pressure roller 6 and swing roller 3 can not reduce, and can suppress leakage.

In addition, the side axle collar 10,10 is so long as be fixed on the formation that the rotating shaft of pressure roller 6 is 12 first-class, can suitably push the side, two ends of elastomer 8 under the situation of pressure roller 6 and swing roller 3 butts, then is not limited to tabular shown in Fig. 3 (a).For example, be under the situation of metal material, hard resin material etc. in the material of the side axle collar 10,10, do not limit the increase of needed thickness of slab, the installation of ribs etc. and shape.

And the external diameter of preferential side over glaze ring 10,10 is littler than the external diameter of pressure roller 6.Promptly, by in advance the external diameter of the side axle collar 10,10 is reduced based on the deflection of swing roller 3 butts, under the situation of butt, compare thus with the external diameter of elastomer 8, the external diameter of the side axle collar 10,10 is little or identical, can avoid damaging the surface of swing roller 3.

And, shown in Fig. 3 (b), as suppressing parts, also can be, at the part built-in axle mandrel ring 11,11 suitable with the

leakage portion

21,21 at both ends in elastomer 8 inside of pressure roller 6.Thus, become thin-walled, can not damage tight contact with swing roller 3 at the both ends of elastomer 8.Therefore, even also can bring into play sufficient liquid extrusion performance, can prevent leakage at both ends.

In addition, the external diameter of built-in axle mandrel ring 11,11 and axial length preferably terminate in the such Min. of elastic force that does not hinder elastomer 8.The external diameter of axle mandrel ring 11,11 and axial length is, the width of the deflection of the elastomer 8 when considering, the leakage portion of under the situation that does not possess a mandrel ring 11,11, being supposed 21,21 etc. with swing roller 3 butts, and select minimal size.

Certainly, shown in Fig. 3 (c), as suppressing parts, also can be in installation side over glaze ring 10,10, at the elastomer 8 inner built-in axle mandrel rings 11,11 of pressure roller 6.In this case, the adjustment by the external diameter that reduces a mandrel ring 11,11, the thickness of slab that increases the side axle collar 10,10 etc. can more effectively prevent the generation of

leakage portion

21,21.

Specifically, with the rotary drum-type magnetic separating device of embodiment 1 identical formation in, at first, the 10% oiliness cooling fluid of using the residue contain 20 μ m～1000 μ m is as processed liquid, and it is that the polyurethane PU of rubber is a rubber that the elastomer 8 of pressure roller 6 uses as hard.The main component of elastomer 8 is uncrosslinked polyester polyurethane, and hardness is that (JIS-A) 60, tearing strength are that 32kg/cm, tensile strength are 245kg/m ², be stretched as 360%.

Axial width Delta W by the

leakage portion

21,21 of predetermined operation after the oiliness cooling fluid has been carried out the separation recycling of residue is measured.The width of

leakage portion

21,21 is 22mm in formation in the past, relative therewith, the width that can confirm

leakage portion

21,21 is in that only to possess the side axle collar 10,10 o'clock be 20mm, be 21.5mm in 11,11 o'clock, be 19mm when possessing both only possessing a mandrel ring, all reduces than in the past formation.

And carried out following experiment: the longitudinal grinding machinery that will use the WA grinding tool is as grinding attachment, and reclaims trickle residue from the water-based cooling fluid of the grinding of having carried out the SK3 steel.In the employed pressure roller 6 of the rotary drum-type magnetic separating device of present embodiment 2, using identical with embodiment 1 as elastomer 8 is that the polyurethane PU of rubber is a rubber as hard.That is, the main component of elastomer 8 is uncrosslinked polyester polyurethane, and hardness is that (JIS-A) 58, tearing strength are that 33kg/cm, tensile strength are 231kg/m ², be stretched as 340%.To axially movable inhibition parts, all is that the side axle collar 10,10 is fixed on the rotating shaft 12 of pressure roller 6 from the outside as the elastomer 8 that suppresses to be installed in pressure roller 6 surfaces.And the same with embodiment 1, the moisture rate (weight %) that the residue that has carried out the separation recovery by both is contained compares.

That is, make the rotary drum-type magnetic separating device of present embodiment 1 and rotary drum-type magnetic separating device in the past, carried out under the same conditions after the machining, from the water-based cooling fluid of same amount, separate and reclaimed residue.By multi-pass operation the moisture rate (weight %) that separate, the residue that reclaims contained is measured.As a result, in present embodiment 2, be that the CR of rubber is the rubber phase ratio with having used as hard, moisture rate has reduced by 1.0 weight %.

And, under the situation that the synchronous pressure of the rotation of the rotation of having carried out making pressure roller 6 and swing roller 3 drives, in present embodiment 2, be that the CR of rubber is that the situation of rubber is compared with having used as hard, moisture rate has reduced by 1.7～1.9 weight %.

As previously discussed, according to present embodiment 2, no matter be under the situation that reclaims the superfine residue from the oiliness cooling fluid, or reclaiming from the water-based cooling fluid under the situation of trickle residue, de-oiling (water) rate of residue is improved, also can improve the residue that produces from the grinding of cutter significantly, to the separation rate of recovery of the superfine residue that in trim process, honing processing, attrition process, microstoning etc., produces.And, can reduce

leakage portion

21,21, and can further improve de-oiling (water) rate of residue.

(embodiment 3)

The formation of the rotary drum-type magnetic separating device of expression embodiment of the present invention 3, with the cutaway view of the face of the rotating shaft direction quadrature of swing roller and the same in the past, omit detailed explanation by giving the symbol identical with Fig. 1.What the rotary drum-type magnetic separating device of present embodiment 3 had is characterized as, be configured in a plurality of

magnet

4,4 on the inner core 5 of swing roller 3 ... polar configurations.

Fig. 4 be the expression embodiment of the present invention 3 the rotary drum-type magnetic separating device swing roller 3

magnet

4,4 ... the cutaway view and the front view of polar configurations.The cutaway view of the face of the rotating shaft direction quadrature of the swing roller 3 of the rotary drum-type magnetic separating device of Fig. 4 (a) expression and embodiment of the present invention 3, the front view of the swing roller 3 of the rotary drum-type magnetic separating device of Fig. 4 (b) expression embodiment of the present invention 3.Magnet 4 is formed with magnet in rotation shaft side and outer circumferential side, shown in Fig. 4 (a), is under the situation of N (S) utmost point in rotation shaft side, and outer circumferential side is S (N) utmost point.And in Fig. 4 (b), only expression can be seen the polarity of a side.

In present embodiment 3, with

magnet

4,4 ... be configured to, identical polar is configured as ring-type, and is configured to adjacent magnet and classifies opposed polarity as.Therefore, shown in Fig. 4 (b), the magnet of left end row be with surperficial magnetic pole be the N

utmost point magnet

4,4 ... be configured to ring-type, next column be with surperficial magnetic pole be the S

utmost point magnet

4,4 ... be configured to ring-type, afterwards alternately with

magnet

4,4 ... be configured to ring-type.

By distributed

magnet

4,4 so ... even in rotary drum-type magnetic separating device in the past, also owing to the polarity difference of adjacent magnet row, therefore particularly the residue of needle-like is difficult to uprightly, and is difficult to penetrate the elastomer 8 of pressure roller 6.But, can not get rid of residue in the upright needle-like of the boundary vicinity of adjacent magnet row, under situation about having used for a long time, residual residue penetrates near the position that the borderline phase with the magnet row of pressure roller 6 works as, and forms the residue ring that turns white.

Therefore, in present embodiment 3, with the part of pressure roller 6 butts near, dispose vertically

magnet

4,4 that row have the polarity opposite polarity that has with above-mentioned magnet row ...That is, the residue of needle-like is at the relative gap portion of the different magnet of polarity row, higher along the upright possibility of the normal direction of the side face of swing roller 3.Therefore, as the

magnet

4,4 of the hatching of Fig. 4 (b) ... shown in, with the part of pressure roller 6 butts near, other magnet row that will have an opposite polarity dispose row vertically, thus in the gap, the residue of the upright needle-like of the normal direction of 3 side faces along the side face magnetic along swing roller, the possibility that penetrates the elastomer 8 of pressure roller 6 reduces.

Same with embodiment 1, on pressure roller 6, using as hard as elastomer 8 is that the polyurethane PU of rubber is a rubber.Main component is uncrosslinked polyester polyurethane, and hardness is that (JIS-A) 58, tearing strength are that 33kg/cm, tensile strength are 231kg/m ², be stretched as 340%.By using this elastomer 8, residue compared with the past is difficult to penetrate, and by as present embodiment 3 distributed

magnet

4,4 ... polarity, even under situation about having used for a long time, also form the residue ring hardly.Therefore,, also can on the elastomer 8 of pressure roller 6, not form the residue ring of ring-type, can work as the rotary drum-type magnetic separating device of long-term stability even the shape of residue is the shape that needle-like etc. penetrates pressure roller easily.

In addition, in above-mentioned example, will have the polarity opposite polarity that has with

magnet row magnet

4,4 ... dispose row vertically, as long as but can be along the residue of side face magnetic needle-like, the magnet row that then polarity is different are not limited to row.

(embodiment 4)

The formation of the rotary drum-type magnetic separating device of expression embodiment of the present invention 4, with the cutaway view of the face of the rotating shaft direction quadrature of swing roller and the same in the past, omit detailed explanation by giving the symbol identical with Fig. 1.What the rotary drum-type magnetic separating device of present embodiment 4 had is characterized as, be configured in a plurality of

magnet

4,4 on the inner core 5 of swing roller 3 ... polar configurations.

Fig. 5 be the expression embodiment of the present invention 4 the rotary drum-type magnetic separating device swing roller 3

magnet

4,4 ... the cutaway view and the front view of polar configurations.The cutaway view of the face of the rotating shaft direction quadrature of the swing roller 3 of the rotary drum-type magnetic separating device of Fig. 5 (a) expression and embodiment of the present invention 4, the front view of the swing roller 3 of the rotary drum-type magnetic separating device of Fig. 5 (b) expression embodiment of the present invention 4.Magnet 4 is formed with magnet in rotation shaft side and outer circumferential side, shown in Fig. 5 (a), is that outer circumferential side is S (N) utmost point under the situation of N (S) utmost point in rotation shaft side.And an expression can be seen the polarity of a side in Fig. 5 (b).

As shown in Figure 5, in present embodiment 4, with

magnet

4,4 ... be configured to, each classifies identical polar configurations as on direction of rotation, and is configured to adjacent magnet and classifies different polarity as.Therefore, as the

magnet

4,4 of the hatching of Fig. 5 (b) ... shown in, first magnet that is listed as near pressure roller 6 is classified as, along rotating shaft direction configuration surface magnetic pole be the N

utmost point magnet

4,4 ... next classify as along rotating shaft direction configuration surface magnetic pole be the S

utmost point magnet

4,4 ..., afterwards along the rotating shaft direction alternately distributed

magnet

4,4 ...By distributed

magnet

4,4 so ..., the residue of needle-like is along the side face magnetic of swing roller 3, and the possibility that penetrates the elastomer 8 of pressure roller 6 reduces.

Same with embodiment 1, on pressure roller 6, using as hard as elastomer 8 is that the polyurethane PU of rubber is a rubber.Main component is uncrosslinked polyester polyurethane, and hardness is that (JIS-A) 58, tearing strength are that 33kg/cm, tensile strength are 231kg/m ², be stretched as 340%.By using this elastomer 8, residue compared with the past is difficult to penetrate, and by as present embodiment 4 distributed

magnet

In addition, in the scope that does not break away from purport of the present invention, can implement above-mentioned embodiment in the mode of having added various changes, for example having suppressed the change of the kind of parts, the change of magnet array etc.

Claims

1, a kind of pressure roller is used for the rotary drum-type magnetic separating device, this pressure roller with the axle with the rotating shaft almost parallel of swing roller be the center rotation and with this swing roller butt; This swing roller is, the built-in inner core that disposes a plurality of magnet, the urceolus rotation around this inner core that is fixed that is made of nonmagnetic substance; This pressure roller is characterised in that,

With the face of above-mentioned swing roller butt on dispose elastomer,

This elastomer is made of the uncrosslinked polyurethane material that with the PEPA is main component.

2, pressure roller as claimed in claim 1 is characterized in that,

Possesses the above-mentioned elastomer of inhibition to axially movable inhibition parts at both ends.

3, a kind of rotary drum-type magnetic separating device is characterized in that,

Possess claim 1 or 2 described pressure rollers.

4, rotary drum-type magnetic separating device as claimed in claim 3 is characterized in that,

The side face of above-mentioned swing roller is level and smooth minute surface.

5, as claim 3 or 4 described rotary drum-type magnetic separating devices, it is characterized in that,

Above-mentioned swing roller is,

On 3/4ths above-mentioned inner core side face roughly, configuration has a plurality of magnet row of identical polar annularly,

The polarity of a plurality of magnet row of disposed adjacent is different in the axial direction,

With the part of above-mentioned pressure roller butt near, dispose at least one row vertically and have other a plurality of magnet with a plurality of above-mentioned magnet row opposite polarities.

6, as claim 3 or 4 described rotary drum-type magnetic separating devices, it is characterized in that,

Above-mentioned swing roller is,

On 3/4ths above-mentioned inner core side face roughly, dispose a plurality of a plurality of magnet row vertically with identical polar,

The polarity of a plurality of magnet row of disposed adjacent is different in a circumferential direction.