CN2681299Y - Permanent magnet for sorption - Google Patents
Permanent magnet for sorption Download PDFInfo
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- CN2681299Y CN2681299Y CN 03265000 CN03265000U CN2681299Y CN 2681299 Y CN2681299 Y CN 2681299Y CN 03265000 CN03265000 CN 03265000 CN 03265000 U CN03265000 U CN 03265000U CN 2681299 Y CN2681299 Y CN 2681299Y
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Abstract
The utility model provides a permanent magnet for sorption which has strong sorbing force which is used for making the fixed objects of a paper sheet, or a diagram, etc. sorbed and fixed on the sorbing objects of a callboard, etc. and has favorable desorbing operability (discharging performance). The utility model is provided with permanent magnets which form a sorption surface K and residual non-sorption surfaces H1, H2, H3 in a plane shape or along a sorbed surface shape. The utility model is characterized in that for instance, the easy magnetization shafts of magnetic powder are directionally and simultaneously magnetized like that the easy magnetization shafts pass through the interiors of the permanent magnets from the sorption surface and then return the sorption surface, or are re-magnetized contradicting to a magnetic field in the same type as directional simultaneous magnetizing; meanwhile, the profile of the permanent magnet for the sorption is provided with a part which at least has one position which belongs to the non-sorption surfaces connected with the sorption surface, and the connected angle theta of the position and the sorption surface is greater than 90 degrees.
Description
Technical field
The utility model relates to a kind of sorption permanent magnet, in more detail, relate to a kind of when the sorptive force that utilizes this permanent magnet is fixed on fixed object thing sorptions such as paper or chart sorption objects such as covering with paint, lacquer, colour wash, etc. iron plate (galvanized sheet), electronic blackboard, notice board, has strong sorptive force, the directed sorption permanent magnet of the acting surface boundling that the operability of desorb simultaneously is good.
Background technology
In the past, as this sorption permanent magnet, used the sintered magnet or the synthetic resin magnet of rare earth system or ferrite system.The orientation direction of these magnetics is axial (axis direction) anisotropic magnet as shown in figure 18, thereby the quality of sorptive force is by magnetic kind of using and containing ratio decision.
As this point of improvement, the direction that special public clear 63-59243 communique has proposed easy magnetizing axis has the scheme of the sintering anisotropy permanent magnet of boundling orientation.
The permanent magnet of above-mentioned communique record as shown in figure 18, the direction that makes easy magnetizing axis is from non-sorption face (all faces beyond the sorption face) towards sorption face boundling orientation (below be designated as simple boundling orientation), so, can make the magnetic flux density of unit are bigger than in the past if use this magnet.
Yet the directed magnet of above-mentioned simple boundling is compared with axial orientation magnet, and is certain hardly enough though sorptive force is big, further improves so wish sorptive force.
Sintered magnet is because the shrinkage of easy magnetizing axis and hard axis poor during sintering, so contain bending, the incidental problem of pettiness crackle.At this moment, even for example select sintering condition, prevent bending or pettiness crackle and the energy goodsization, the shortcoming of pettiness crackle takes place in goods repeatedly that obtain in the use of sorption, desorb because of internal modification.
In order to prevent its pettiness crackle, improve sorptive force, as shown in figure 19, the using method that the back of the body yoke 10 of assembling ferromagnetism body on sintered magnet 9 is arranged, but being not easy to make the surface of magnet 9 and the end face of back of the body yoke 10 is that flush constitutes on identical faces, back of the body yoke end face causes that when magnet surface retreats sorptive force descends, and back of the body yoke end face is from magnet surface when outstanding, has sorptive force is descended but also to damage notice board, electronic blackboard etc. by the problem of sorption face when sorption.
The utility model content
The utility model provides a kind of and more can improve sorptive force than the directed magnet of above-mentioned simple boundling, simultaneously the good sorption permanent magnet of desorb operability (from by unloading property of sorption face) in view of such truth.
Inventor of the present utility model is in order to solve above-mentioned problem, study intensively, a kind of permanent magnet is consequently proposed, this permanent magnet is made of the group of magnets compound that contains the specified quantitative magnetic, in the specific direction orientation, and have by plane or along the side section of the permanent magnet of sorption face that is constituted by the shape of sorption face and remaining non-sorption face, because spending greater than 90 of the above-mentioned non-sorption face that is connected with above-mentioned sorption face with sorption face connection angle θ, so find to reach desirable purpose, to such an extent as to finish the utility model.
The content of first aspect of the present utility model is the directed sorption permanent magnet of a kind of acting surface boundling, this permanent magnet has by sorption face and remaining non-sorption face plane or that the edge is constituted by the shape of sorption face, it is characterized in that, magnetize simultaneously in orientation, make the easy magnetizing axis of magnetic turn back to sorption face again by magnet inside from sorption face, perhaps magnetize again with counter field with magnetized same-type of orientation while, simultaneously in its side, has connection angle θ above-mentioned non-sorption face and sorption face that a place is connected with above-mentioned sorption face at least greater than 90 parts of spending.
The content of second aspect of the present utility model is, as the described sorption permanent magnet of first aspect, it is characterized in that, in the grip part that the non-sorption face side setting of permanent magnet is made of the material beyond the group of magnets compound.
The content of the third aspect of the present utility model is, to it is characterized in that the average orientation degree is more than 80% as the described sorption permanent magnet in first or two aspects.
The content of fourth aspect of the present utility model is, to it is characterized in that permanent magnet is that 35～75vol%, remainder are that synthetic resin constitutes by magnetic as each described sorption permanent magnet in first to three aspect.
The content of the 5th aspect of the present utility model is, as the described sorption permanent magnet of fourth aspect, it is characterized in that synthetic resin is to select at least a kind from polyamide, acrylonitrile-butadiene-styrene (ABS) (ABS) resin, Corvic, polyphenylene sulfide (PPS) resin, liquid crystalline resin, synthetic rubber.
The content of the 6th aspect of the present utility model is as the described sorption permanent magnet in the 4th and five aspects, to it is characterized in that permanent magnet is obtained by injection molded.
Description of drawings
Fig. 1 is that expression is used to make the skeleton diagram of sorption of the present utility model with field orientation injection molded metal pattern one example of permanent magnet.
Fig. 2 is the I-I profile of Fig. 1.
Fig. 3 is the II-II profile of Fig. 1.
Fig. 4 is that expression is used to make the magnetic circuit of sorption usefulness permanent magnet of the present utility model and the skeleton diagram of directed state.
Fig. 5 is that expression is used to make the magnetic circuit of sorption usefulness permanent magnet of the present utility model and the skeleton diagram of directed state.
Fig. 6 is that expression is used to make the magnetic circuit of sorption usefulness permanent magnet of the present utility model and the skeleton diagram of directed state.
Fig. 7 is that expression is used to make the magnetic circuit of sorption usefulness permanent magnet of the present utility model and the skeleton diagram of directed state.
Fig. 8 is that expression is used to make the magnetic circuit of sorption usefulness permanent magnet of the present utility model and the skeleton diagram (III-III section) of directed state.
Fig. 9 is that expression is used to make the magnetic circuit of sorption usefulness permanent magnet of the present utility model and the skeleton diagram of directed state.
Figure 10 is that expression is used to make the magnetic circuit of sorption usefulness permanent magnet of the present utility model and the skeleton diagram of directed state.
Figure 11 (a)～(e) is the skeleton diagram of expression sorption of the present utility model with the example of permanent magnet, is profile above (e), is ground plan below.
Figure 12 (a)～(h) is the vertical view of expression sorption of the present utility model with the permanent magnet example.
Figure 13 (a)～(c) is the profile of expression sorption of the present utility model with the permanent magnet example, (d) is oblique view.
Figure 14 be expression with sorption of the present utility model with permanent magnet with the concept map of paper sorption at the state of covering with paint on the iron plate.
Figure 15 represents with the concept map of existing axial orientation magnet with the state of paper sorption on covering with paint iron plate.
Figure 16 is expression with the existing concept map that the axial orientation magnet of back of the body yoke has been installed the paper sorption state on covering with paint iron plate.
Figure 17 is the skeleton diagram of the existing axial orientation permanent magnet of expression, is oblique view above, is profile below.
Figure 18 is the skeleton diagram of the directed permanent magnet of the existing simple boundling of expression, is oblique view above, is profile below.
Figure 19 is the existing profile that the axial orientation permanent magnet of back of the body yoke has been installed of expression.
The explanation of symbol:
1 inner chamber
2 down gates
3 runner gatees
4 permanent magnets
5 yokes (ferromagnetism body)
6 nonmagnetic materials
7 sorption permanent magnets
8 through holes
9 sintered magnets
10 back of the body yokes
11 paper
12 application iron plates
13 grip parts
14 handles
K sorption face
H1, H2, the non-sorption face of H3
D, d1, d2 diameter
T, t1, t2 thickness
θ, θ 1 angle
Embodiment
Inventor of the present utility model thinks, at first in order to improve the sorptive force of permanent magnet, when making the magnet sorption, should make from the magnetic line of force of the futile radiation of non-sorption face and reduce, and think make magnetic easy magnetizing axis from sorption towards magnet inside, and then the directed optimum of the sorption face of returning.
And, because the permanent magnet that obtains has extremely strong strong sorptive force, its desorb operability is studied, found that, owing to have with plane or along the side section of the permanent magnet of sorption face that is constituted by the shape of sorption face and remaining non-sorption face, the angle θ that is connected with sorption face that makes the above-mentioned non-sorption face that is connected with above-mentioned sorption face can obtain the good sorption permanent magnet of desorb operability greater than 90 degree, has finished the utility model.
Sorption of the present utility model can be one of them of sintered magnet, synthetic resin magnet with permanent magnet, but bending as described above or pettiness crackle never take place, even aspects such as mistake falls crackle or fragment do not take place yet in using, and formability is good consider that synthetic resin magnet is best.
As the used magnetic of the utility model, can use ferromagnetic oxide powder, Al-Ni-Co series magnetic and samarium-cobalt magnetic powder or neodymium-iron-boron be the magnetic that contains uncommon great soil group element such as magnetic, samarium-iron-nitrogen system magnetic etc. existing known any, for its mean particle diameter, usually ferrite system can be 0.5～2.0 μ m degree, other be 2～50 μ m degree.
For synthetic resin as the used adhesive of the utility model, can use existing known any.If its typical example of expression, can use polyamide 6, polyamide 12, polyamide 66, contain the polyamide-based resin of the aromatic polyamide etc. of aromatic ring; Corvic, vinyl chloride-vinyl acetate copolymer resin, plexiglass, polystyrene resin, make polyethylene or polypropylene separately or the polyolefin-based resins of copolymerization; Mylar, polyether etherketone (PEEK) resin, polyphenylene sulfide (PPS) resin, haloflex (CPE) resin, chlorosulfonated polyethylene resin (trade name of Du Pont " Hai Pulong "), acrylonitrile-butadiene-styrene (ABS) (ABS) resin, liquid crystalline resin, the epoxy of polyurethane resin, silicone resin, polycarbonate resin, polybutylene terepthatlate (PBT), polyethylene Polyethyleneglycol Terephthalate (PET) etc. are that resin, phenolic aldehyde are resin; The rubber of isoprene, neoprene, styrene-butadiene, butadiene, acrylonitrile butadiene rubber etc.; The synthetic rubber of olefin-based ethylene-propylene-diene-methylene copolymer (EPDM), carbamate system, polyester system etc. etc.These can use separately or mix more than 2 kinds as required and use.In these, preferably polyamide, ABS resin, Corvic, PPS resin, liquid crystalline resin, synthetic rubber.
Magnetic and as the cooperation ratio of the synthetic resin of adhesive, magnetic is 35～75vol%, synthetic resin is the scope of 65～25vol%, preferably 60～70vol%.Magnetic during less than 35vol% sorptive force insufficient, surpass the 75vol% melt viscosity and uprise, the injection molded difficulty promptly enables to carry out injection molded, or the pettiness crackle takes place, or in the accident of using repeatedly with magnet as sorption, breaking easily during the desorb repeatedly.
In addition, can certainly use plasticizer or antioxidant, surface conditioning agent etc. commonly used in the past according to purpose.
Sorption of the present utility model is made of anisotropic magnet with permanent magnet, this magnet is carried out orientation to be magnetized simultaneously, make the easy magnetizing axis of the magnetic powder that constitutes this permanent magnet return sorption face again by magnet inside, or apply the counter field that magnetizes same-type simultaneously with orientation and magnetize again from sorption face.Such anisotropic magnet can be made by use-case injection mold assembly as shown in Figure 1.
Fig. 1 is the skeleton diagram of producing a plurality of injection mold assemblies one example of the outstanding mode of 3 blocks of plates of expression, the 1st, and inner chamber, the 2nd, down gate, the 3rd, runner gate, the 4th, permanent magnet, the 5th, yoke (ferromagnetism body), the 6th, nonmagnetic material.Fig. 2 is the I-I section of Fig. 1, and Fig. 3 is the II-II section of Fig. 1.
Magnetic and the synthetic resin resin magnet composition as principal component is filled in the inner chamber 1 through down gate 2, runner gate 3, along magnetic line of force orientation, make the easy magnetizing axis of magnetic particle return sorption face again by magnet inside as shown by arrows from sorption face.Fig. 1 represents the example with permanent magnet 4, can certainly use electromagnet to replace it.The sorption of taking out from inner chamber 1 has sorption face K and non-sorption face H1～H3 with permanent magnet 7.
Sorption of the present utility model obtains except the also available compression molding in above-mentioned injection molded place, extrusion molding with permanent magnet, but can obtain good sorption permanent magnet with injection molded.
The magnetic that has during compression molding can not be shaped, and for example, average grain diameter is less than the ferrite of 1～5 μ m degree or the magnetic of SmFeN system, especially in the time of will obtaining approaching magnet, cause when being pressed into shape and take doming effect, can not import smoothly in the inner chamber that the occasion that causes that so-called filling is bad is arranged.Consequently, the space takes place in goods, and mechanical strength is bad, and the tendency of cracky is arranged when in use falling by mistake.
Extrusion molding must be set high viscosity in order to keep shape after pushing, because the application time of directional magnetic field is short, can not improve degree of orientation, and its result is difficult to obtain the occasion of the high goods of sorptive force sometimes.Thereby extrusion speed is extremely slow, must increase the field orientation time.
Injection molded can fully be guaranteed until the magnetic field of cooling curing application time, be orientation time because the viscosity during the inner chamber filling is low, so can obtain low cost, the good sorption permanent magnet of quality, is to suit especially.Reaction injection molding(RIM) shaping (RIR) needs special formation system, but also can use as the manufacturing process of the advantage that has both injection molded.
Sorption of the present utility model is preferably adjusted to the average orientation degree more than 80% with permanent magnet.The average orientation degree is less than 80% o'clock, even improve the tendency that the containing ratio of magnetic also has the permanent magnet that is difficult to obtain strong sorptive force.The average orientation degree is preferably more than 90%.
In the utility model, obtain the average orientation degree with following method.
Determined sample is divided into the right angle to orientation direction, the directed situation of its section each several part and the reference orientation degree sample of using scanning electron microscopy (SEM) photo to obtain are in advance compared, the degree of orientation of decision each several part is as the average orientation degree.The making side of reference orientation degree sample, the directional magnetic field intensity when for example setting sample making is made, and making its degree of orientation roughly is 5% pitch.The visual field of the SEM photo of determined sample is set for, and orientation connects magnet inside to returning sorption face again from sorption face, is divided into 10, adopts its mean value.
The excitatory method of field orientation can adopt known permanent magnet mode and electromagnet mode.When using uncommon great soil group to be magnetic, it is favourable that expectation applies the big electromagnet mode in magnetic field, but when ferrite is, uses permanent magnet to have the advantage of metal pattern compactness.
As the permanent magnet of the excitatory usefulness of field orientation, preferably using known neodymium-iron-boron is sintered magnet, samarium-cobalt sintered magnet.
Fig. 4-Figure 10 represents the sorption of the present utility model magnetic circuit of permanent magnet and several examples of directed state, represents the sorption permanent magnet of back taper shape for example.In these figure, numeral reference dimension (mm).
The directed permanent magnet of the acting surface boundling of the present utility model that obtains as shown above owing to representing extremely strong strong sorptive force, when not forming specific shape, is difficult to draw back this magnet from sorbate, brings obstacle to the desorb operation.
Thereby, have by plane or along the side section of the permanent magnet of the sorption face K that is constituted by the shape of sorption face and remaining non-sorption face H1～H3, the shape that the angle θ that is connected with sorption face of the above-mentioned non-sorption face that must be connected with above-mentioned sorption face has as at least 1 place greater than 90 parts of spending, the preferably shape that has as 2 places.
Among the present invention, the angle θ that is connected with sorption face of the so-called non-sorption face that is connected with sorption face is meant the end and the straight line of non-sorption face H1 that is connected with sorption face K or H2 maximum portion and the angle of sorption face K that connect sorption face K.
The permanent magnet of above-mentioned given shape of the present utility model Figure 11 (a)～(e) illustration of representing sectional side view.
That is, permanent magnet 7 (a) is made up of sorption face K and non-then acting surface H1, H2, H3, spends the contrary platform shape that forms like that by the angle θ of this sorption face K and connected non-sorption face H1, H2 greater than 90 and constitutes.(b) permanent magnet 7 is by being made of sorption face K and non-sorption face H1, H2, H3, and the angle θ of the straight line that is connected with the maximum portion that makes a connected part collapse to non-sorption face H1, the H2 of arcuation by this sorption face K constitutes against the platform shape greater than the summary that 90 degree form.(c) permanent magnet 7 is made of sorption face K and non-sorption face H1, H2, H3, and by this non-sorption face H1, H2 are constituted near the summary T word shape that the part of this non-sorption face H3 bloats, the angle θ of the straight line that sorption face K is connected with the maximum portion (bellying) that makes connected non-sorption face H1, H2 forms greater than 90 and spends.(d) permanent magnet 7 has the annular shape of through hole 8 to constitute by central portion, and the angle θ of sorption face K and connected non-sorption face H1, H2 forms greater than 90 degree.(e) permanent magnet 7 expressions partly are provided with the example of the part of angle θ at 2 places, the angle of sorption face K and connected non-sorption face H1, H2 forms greater than 90 degree.
At sorption permanent magnet of the present utility model, if being 90 degree, angle θ can slide with next finger, be difficult to finger is placed on the permanent magnet permanent magnet is peeled from sorbate.The upper limit of angle θ is not particularly limited, but sorption face diminishes relatively when too big, and sorptive force descends, so bad.Usually preferably about 100～135 degree.As the angle θ portion that all is provided with of (a)～(b) permanent magnet that is shown in, do not limit the place of letting go and referring in the desorb operation, thereby, can where let go finger can, so use easily,, operate in the fingering row desorb of letting go of this part if when part is provided with like that as (e) shown in.
Carry out shot-peening processing or process the back asperitiesization by face, can prevent that finger from sliding, and then can put forward the desorb operability effectively with the pull and stretch of metal pattern to non-sorption face H1, H2.
As the vertical view of sorption of the present utility model with permanent magnet, not restriction especially, as described in Figure 12 (a)～(h) illustration, also can be circular (a), removing the porose annular of oval-shaped triangle (b), square (c), pentagon (d), hexagon (e), octangle polygonals such as (f), star (g), central portion etc., also can be to have circular (h) in these bight.Also can form shapes such as various marks, animal.
Sorption permanent magnet of the present utility model, in order to improve the desorb operability, also can be shown in Figure 13 (a) and (b), (c), with the non-sorption face side (be not only the opposite side of sorption face and comprise the side) of permanent magnet 7 grip part 13 is set in sorption of the present utility model.Such grip part also can be the group of magnets compound, is economical but use the resin different with the group of magnets compound.Be not particularly limited as such resin, but cheap resins for universal use such as polyene such as polyethylene, polypropylene resin, Corvic, polystyrene resin preferably.Also can fit a handle on as the grip part.For handle, can use the known shape such as handle 14, the form of falling silk hat handle of pot cover mode such shown in (d).Ream sorption with the non-sorption face side of permanent magnet to the so not useful segment magnet composition of sorption and the shape of handle is set, to economical with materials, reduce cost favourable.Grip part or handle embed or bonding setting after can being shaped, being shaped by inserting.
Sorption of the present utility model with permanent magnet since θ greater than 90 degree, so all there is not said damage when fall down because of carelessness the grip part in using.
Figure 14, Figure 15, Figure 16 use sorption of the present utility model to represent paper 11 sorptions are fixed on the concept map of the state of covering with paint, lacquer, colour wash, etc. iron plate 12 with the axial orientation permanent magnet of permanent magnet, existing axial orientation permanent magnet, existing installation back of the body yoke respectively.
Can clearly think from these figure, sorption permanent magnet of the present utility model, since few from the magnetic line of force of the useless radiation of non-sorption face, the magnetic line of force can be effective to sorption, so can bring into play strong sorptive force.
Embodiment
Below, the utility model by enumerate embodiment, comparative example is described in more detail, but these are to the utility model without limits.
Use the injection mold assembly of the outstanding mode of 3 blocks of plates of setting magnetic circuit shown in Figure 1,, make the directed sorption magnet of effect boundling of following 3 kinds of shapes by the field orientation injection molded at following cooperation and molding condition.The sorption that obtains with following method and benchmark evaluation is with the rerum natura of permanent magnet.Table 1 expression evaluation result.
The size of 3 kinds of shapes is as shown in following.
Figure 11 (a) shape: diameter d=30mm, thickness t=5mm, θ=115 degree
Figure 11 (b) shape: diameter d=30mm, thickness t 1=1mm, t2=5mm, θ=120 degree
Figure 11 (c) shape: diameter d=30mm, thickness t 1=1mm, t2=5mm, θ=100 degree
(cooperation)
Magnetic (ferromagnetic oxide powder: the magnetic plumbite is the strontium based ferrite:
Mean particle diameter 1.5 μ m) 68vol%
Synthetic resin (polyamide 12) 31vol%
Plasticizer (TTS: isopropyl three isostearoyl titanate esters) 1vol%
(molding condition)
Penetrate center housing temperature: 280 degree
Metal pattern temperature: 100 ℃
Penetrate pressure: 1500kg/cm
2
The excitatory time: 20 seconds
Cooling time: 25 seconds
Injection cycle: 40 seconds
(evaluation method and benchmark)
Sorptive force: 1 A4 is duplicated with the paper sorption with permanent magnet with sorption and to remain on sorptive force (g/cm when covering with paint, lacquer, colour wash, etc. iron plate
2).
◎: extremely strong (1200g/cm
2More than)
Zero: strong (900～less than 1200g/cm
2)
△: common (600～less than 900g/cm
2)
: weak (less than 600g/cm
2)
Bending after being shaped: with the naked eye estimate the bending of sorption after being shaped with permanent magnet.
◎: thinking does not have bending.
Zero: think slight curvature.
△: think a small amount of bending.
: think crooked.
Pettiness crackle: with the naked eye estimate the pettiness crackle of sorption with permanent magnet.
◎: thinking does not have the pettiness crackle.
Zero: think pettiness crackle pettiness.
△: think that the pettiness crackle is a small amount of.
: think that the pettiness crackle is remarkable.
Pettiness crackle when using repeatedly: the fine crack when with the naked eye estimating sorption and using repeatedly with permanent magnet.
◎: thinking does not have the pettiness crackle.
Zero: think pettiness crackle pettiness.
△: think that the pettiness crackle is a small amount of.
: think that the pettiness crackle is remarkable.
Unloading property:
◎: catch gently and unload.
△: have and catch the occasion that can not unload gently.
Even: catch the occasion that can not unload effectively.
Embodiment 2-8
The embodiment of other changes as shown in table 1 makes the directed sorption permanent magnet of acting surface boundling similarly to Example 1, estimates rerum natura.Table 1 expression evaluation result.The shape of Figure 11 of embodiment 8 (d) is following shape.
The shape of Figure 11 (d): diameter d 1=30mm, d2=10mm
Thickness t=5mm, θ=115 degree, θ 1=115 degree
Table 1
| | ||||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |||
| Magnetic circuit | Sorption face boundling orientation | |||||||||
| Synthetic resin | PA12 | PA12 | PA12 | PA fragrance family | PPS | CPE | PEEK | PA6 | ||
| Manufacturing process | Penetrate | Penetrate | Penetrate | Penetrate | Penetrate | Penetrate | Penetrate | Penetrate | ||
| Magnetic containing ratio (vol%) | 68 | 45 | 68 | 62 | 62 | 62 | 58 | 68 | ||
| Average orientation degree (%) | 90 | 95 | 80 | 90 | 90 | 90 | 90 | 90 | ||
| Shape and θ (degree) | Figure 11 | Figure 11 (a) 115 degree | Figure 11 (a) 115 degree | Figure 11 (a) 115 degree | Figure 11 (a) 115 degree | Figure 11 (a) 115 degree | Figure 11 (a) 115 degree | Figure 11 (d) 115 degree | ||
| (a) 115 degree | (b) 120 degree | (c) 100 degree | ||||||||
| Sorptive force | ◎ | ◎ | ◎ | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
| Bending after being shaped | ◎ | ◎ | ◎ | ◎ | ◎ | ◎ | ◎ | ◎ | ◎ | ◎ |
| The pettiness crackle | ◎ | ◎ | ◎ | ◎ | ◎ | ◎ | ◎ | ◎ | ◎ | ◎ |
| Pettiness crackle when using repeatedly as sorption stationery | ◎ | ◎ | ◎ | ◎ | ◎ | ◎ | ◎ | ◎ | ◎ | ◎ |
| Unloading property | ◎ | ◎ | ◎ | ◎ | ◎ | ◎ | ◎ | ◎ | ◎ | ◎ |
Change as shown in table 2ly, make the directed sorption permanent magnet of acting surface boundling, estimate rerum natura.
The cooperation and the molding condition of the sintered magnet of embodiment 11 are as follows.
(cooperation)
Magnetic (ferromagnetic oxide powder: the magnetic plumbite is the strontium based ferrite:
Mean particle diameter 1.5 μ m) 50vol%
Water 50vol%
(molding condition)
Pumping method: container mode
Excitatory method: perpendicular magnetic forming
Forming temperature: 25 ℃
Firing temperature: 1250 ℃
Comparative example 1～4
Comparative example 1 is altered to axial orientation, comparative example 2 is altered to simple boundling orientation, for comparative example 3, θ with shape (a) in embodiment 1 changes to 90 degree from 115 degree, for comparative example 4, formation is formed in the example that axial orientation has back of the body yoke with the sintered magnet that cooperation identical with the foregoing description 11 and molding condition obtain.The evaluation result of rerum natura is shown in table 2.
In order to compare, the directed sorption of the acting surface boundling of embodiment 1 also discloses simultaneously with the result of permanent magnet.
(evaluation method and benchmark)
Not at the evaluation method and the benchmark such as following of the rerum natura of table 1 record.
Sorption bed knife: A4 is duplicated with the paper sorption with magnet with sorption and to be fixed on maximum numbers when covering with paint, lacquer, colour wash, etc. iron plate.
Scratch during sorption: with sorption with the permanent magnet sorption when covering with paint, lacquer, colour wash, etc. the former state sideslip of iron plate (be coated with and be decorated with the thermoplasticity coating composition that methyl methacrylate is a principal component) back, the iron plate that detects by an unaided eye is coated with facing and has or not scratch.
◎: think not abrade fully.
Zero: think that pettiness abrades.
△: think a small amount of scratch.
: think a lot of scratches.
Table 2
| Embodiment | Comparative example | |||||||||
| 1 | 9 | 10 | 11 | 1 | 2 | 3 | 4 | |||
| Magnetic circuit | Sorption face boundling orientation | Sorption face boundling orientation | Sorption face boundling orientation | Sorption face boundling orientation | Axial orientation | Simple boundling stare to | Sorption face boundling orientation | Axial orientation | ||
| Magnetic | The S ferrite | The S ferrite | The S ferrite | The S ferrite | The S ferrite | The S ferrite | The S ferrite | The S ferrite | ||
| Synthetic resin | PA12 | PA12 | PA12 | -- | PA12 | PA12 | PA12 | -- | ||
| Manufacturing process | Penetrate | Penetrate | Compression | Sintering | Penetrate | Penetrate | Penetrate | Sintering | ||
| Magnetic containing ratio (vol%) | 68 | 68 | 90 | 100 | 68 | 68 | 68 | 100 | ||
| Average orientation degree (%) | 90 | 75 | 80 | 85 | 90 | 90 | 90 | 95 | ||
| Shape and θ (degree) | Figure 11 | Figure 11 (a) 115 degree | Figure 11 (a) 115 degree | Figure 11 (a) 115 degree | Figure 17 90 degree | Figure 18 90 degree | 90 degree | Figure 17 90 degree | ||
| (a) 115 degree | (b) 120 degree | (c) 100 degree | ||||||||
| Sorptive force | ◎ | ○ | ○ | △ | ○ | ◎ | △ | ◎ | ◎ | |
| The sorptive force bed knife (piece) | 25 | 25 | 25 | 20 | 20 | 25 | 15 | 18 | 25 | 10 |
| Bending after being shaped | ◎ | ◎ | ◎ | ◎ | ◎ | △～○ | ◎ | ◎ | ◎ | ◎ |
| The pettiness crackle | ◎ | ◎ | ◎ | ◎ | △ | △～○ | ◎ | ◎ | ◎ | ◎ |
| Pettiness crackle when using repeatedly as sorption stationery | ◎ | ◎ | ◎ | ◎ | △ | △～○ | ◎ | ◎ | ◎ | ○ |
| Scratch during sorption | ◎ | ◎ | ◎ | ◎ | ◎ | ○ | ◎ | ◎ | ◎ | |
| Iron back of the body yoke | Do not have | Do not have | Do not have | Do not have | Do not have | Do not have | Do not have | Do not have | Do not have | Have |
| Unloading property | ◎ | ◎ | ◎ | ◎ | ◎ | ◎ | ◎ | ◎ | ◎ | |
From the result of table 1 and table 2 as can be known, the synthetic resin permanent magnet sorptive force of the simple boundling orientation of the axial orientation of comparative example 1 or comparative example 2 is insufficient, and shown in comparative example 3, even acting surface boundling orientation, at θ is 90 degree, owing to strong sorptive force is arranged, but unloading property is poor, so impracticable.Shown in comparative example 4, by back of the body yoke is set, even axial orientation can be improved sorptive force, but easily scratch of sorbate surface during sorption.And, owing to carrying on the back uneven of yoke end face and magnet surface, so think that sorptive force has deviation.
As mentioned above, as according to the utility model, can provide at an easy rate that a kind of sorbate face does not have scar, the good sorption permanent magnet of desorb operability (unloading property) when having powerful sorptive force.
Claims (4)
1, the directed sorption permanent magnet of a kind of acting surface boundling, have with sorption face and remaining non-sorption face plane or that the edge is constituted by the shape of sorption face, it is characterized in that, at its side section, have the parts of the angle θ that is connected with sorption face of the above-mentioned non-sorption face that a place is connected with above-mentioned sorption face at least greater than 90 degree.
2, sorption permanent magnet as claimed in claim 1 is characterized in that, is provided with the grip part that is made of material beyond the group of magnets compound in the non-sorption face side of permanent magnet.
As each described sorption permanent magnet of claim 1 or 2, it is characterized in that 3, permanent magnet is that 35～75vol%, residue are that synthetic resin constitutes by magnetic.
4, sorption permanent magnet as claimed in claim 3 is characterized in that, synthetic resin is at least a kind that selects from polyamide, acrylonitrile-butadiene-styrene resin, Corvic, polyphenylene sulfide, liquid crystalline resin, synthetic rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03265000 CN2681299Y (en) | 2003-04-29 | 2003-04-29 | Permanent magnet for sorption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03265000 CN2681299Y (en) | 2003-04-29 | 2003-04-29 | Permanent magnet for sorption |
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| Publication Number | Publication Date |
|---|---|
| CN2681299Y true CN2681299Y (en) | 2005-02-23 |
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ID=34598902
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112712988A (en) * | 2020-12-11 | 2021-04-27 | 广州金南磁性材料有限公司 | Positioning adsorption magnet and preparation method and application thereof |
-
2003
- 2003-04-29 CN CN 03265000 patent/CN2681299Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112712988A (en) * | 2020-12-11 | 2021-04-27 | 广州金南磁性材料有限公司 | Positioning adsorption magnet and preparation method and application thereof |
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