CN102847939B - Magnetic material powder forming mold with non-magnetic isolating structure - Google Patents
Magnetic material powder forming mold with non-magnetic isolating structure Download PDFInfo
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- CN102847939B CN102847939B CN201210374172.6A CN201210374172A CN102847939B CN 102847939 B CN102847939 B CN 102847939B CN 201210374172 A CN201210374172 A CN 201210374172A CN 102847939 B CN102847939 B CN 102847939B
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Abstract
The invention discloses a magnetic material powder forming mold with a non-magnetic isolating structure. The magnetic material powder forming mold comprises a female die and an isolating structure, wherein the female die comprises a front side plate, a rear side plate, a left side plate and a right side plate; the front side plate, the rear side plate, the left side plate and the right side plate are enclosed to form a mold cavity; concave structures which are matched with the isolating structure are arranged on the left side plate and the right side plate on one side in the mold cavity; and the isolating structure is positioned in the concave structures and is made of a non-magnetic material. According to the magnetic material powder forming mold, the non-magnetic isolating structures are arranged inside the left side plate and the right side plate, suction force of the left side plate and the right side plate stressed during movement of the magnetic powder in the mold cavity is overcome, and the magnetic powder is prevented from being sucked to the left side and the right side of the mold cavity by the left side plate and the right side plate, so that a finally formed blank is prevented from being formed into a waist shrinkage shape with two large ends and a small middle part, and the quality and the performance of the blank made through the mold are improved.
Description
Technical field
The present invention relates to mould manufacturing field, refer in particular to a kind of not mold for molding magnetic material powder of magnetic conduction isolation structure that has.
Background technology
As shown in Figure 1, the mould using is at present comprised of former and seaming chuck 5, push-down head 6, and former is comprised of four blocks of side plates all around, and wherein left plate 1, right plate 2 are used permeability magnetic materials, are generally Gr12 steel or GGr15 steel; Front side board 3, back side panel 4 are non-magnet_conductible material, are generally 304 stainless steels, without magnetic mould steel, non-magnesium hard alloy etc., and seaming chuck 5, push-down head 6 are also non-magnet_conductible material.
Magnaglo needs to have magnetic field orientating in pressing process, makes the direction of magnetization of powder identical with the direction of externally-applied magnetic field.The coil of orientation use is arranged on press, when coil electricity, and press frame, cartridge, forward and backward side plate, die cavity form magnetic circuit.
The benefit of existing such mould is: whole magnetic resistance is less, only needs less electric current just can make the magnetic induction intensity in die cavity reach specification requirement.
But above-mentioned mould has only been considered the intensity in magnetic field, do not consider the movement of magnetic in die cavity.In fact, if magnetic in a uniform magnetic field, magnetic can remain static or only rotate so, turn to the direction of magnetization of magnetic consistent with magnetic direction till; And when Magnetic field inhomogeneity, magnetic can move towards the high place of magnetic induction intensity.
Clearly, the mould using at present, because its left and right side plate has been used permeability magnetic material, the distribution situation of its die cavity internal magnetic field is: higher the closer to left side plate place magnetic induction intensity, in middle, magnetic induction intensity is minimum.See intuitively, be exactly, after left and right side plate magnetizes in magnetic field, to have produced the attraction to magnetic, when this has just caused orientation, magnetic moves at two ends to the left and right, thereby make blank material out of compacting inhomogeneous, finally show that blank after sintering becomes the waist contracting shape of big at both ends and small in middle.
In addition, inhomogeneous due to Distribution of Magnetic Field, has also caused compacting blank out inconsistent in the differently-oriented directivity at each position, also can affect its performance.
Summary of the invention
The object of this invention is to provide a kind of not mold for molding magnetic material powder of magnetic conduction isolation structure that has, it can overcome the deficiencies in the prior art, makes the blank material that produces by this mould even, functional.
The object of the present invention is achieved like this:
There is the not mold for molding magnetic material powder of magnetic conduction isolation structure, it includes former and isolation structure, described former includes front side board, back side panel, left plate and right plate, described front side board, described back side panel, described left plate and described right plate are around forming a die cavity, the side that described left plate and described right plate are positioned at die cavity at it is equipped with the recessed structure matching with described isolation structure, described isolation structure is positioned at described recessed structure, and described isolation structure is that non-magnet_conductible material is made.
After described isolation structure is set, described left plate and right plate that can magnetic conduction have had certain distance from magnetic, thereby can weaken left plate and the attraction of right plate to magnetic; When attraction balance that left plate and right plate produce the attraction of magnetic and magnetic self, magnetic just can not move, and at this moment, the magnetic field in die cavity also can become a uniform magnetic field.
Described isolation structure can be division board, and it includes two division boards.Also can be hollow cylindrical body, two opposite sides of described cylindrical body be positioned at described recessed structure, and two other opposite side is close to the inner side of described front side board, described back side panel respectively.
The thickness of common described isolation structure is 4-30mm.As the optimal way of isolation structure, the thickness of described isolation structure is 7-15mm.
The width of described recessed structure matches with the thickness of described isolation structure.
The length of described recessed structure is greater than the width of described die cavity.
The height of described recessed structure matches with the height of described die cavity.
The present invention compared with prior art, has following beneficial effect:
The present invention arranges non-magnetic isolation structure by the inner side at described left plate and described right plate, left plate that magnetic is subject in die cavity and the attraction of right plate have been overcome, avoid magnetic to be attracted to cause to the left and right both sides of die cavity the blank finally made to form the waist contracting shape of big at both ends and small in middle by left plate and right plate, improved quality and the performance of the blank of making by this mould.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art mold for molding magnetic material powder;
Fig. 2 is that the present invention has the not structural representation of the mold for molding magnetic material powder embodiment 1 of magnetic conduction isolation structure;
Fig. 3 is that the present invention has the not structural representation of the mold for molding magnetic material powder embodiment 2 of magnetic conduction isolation structure.
In figure: 1-left plate, 2-right plate, 3-front side board, 4-back side panel, 5-seaming chuck, 6-push-down head, 11-seaming chuck, 12-push-down head, 13-front side board, 14-back side panel, 15-left plate, 16-right plate, 17-die cavity, the recessed structure of 18-, the recessed structure of 19-, 20-isolation structure.
The specific embodiment
Embodiment 1:
As shown in Figure 2, of the present invention have a not mold for molding magnetic material powder of magnetic conduction isolation structure, and it includes seaming chuck 11, push-down head 12, former and isolation structure 20.Described former includes front side board 13, back side panel 14, left plate 15 and right plate 16, described front side board 13, described back side panel 14, described left plate 15 and described right plate 16 are around forming a die cavity 17, described seaming chuck 11, described push-down head 12 mate with described die cavity 17, press in described die cavity 17 respectively from top, the below of described die cavity 17.The side that described left plate 15 and described right plate 16 are positioned at die cavity 17 is respectively equipped with recessed structure 18,19, and described isolation structure 20 coordinates with described recessed structure 18,19, and described isolation structure 19 adopts non-magnet_conductible material to make.
Like this, after described isolation structure 20 is set, described left plate 15 and described right plate 16 that can magnetic conduction have had certain distance from magnetic, thereby can weaken the attraction of left plate 15 and 16 pairs of magnetics of right plate; When the attraction of left plate 15 and 16 pairs of magnetics of right plate and the attraction balance of magnetic self generation, magnetic just can not move, and at this moment, the magnetic field in die cavity 17 also can become a uniform magnetic field.
The thickness of described isolation structure 20 is 4-30mm; When this mould is applied to sintered NdFeB powder compacting, the thickness of described isolation structure 20 is preferably 7-15mm.The material of described isolation structure 20 can be any one non-magnet_conductible materials such as 304 stainless steels, 306 stainless steels or austenitic stainless steel and makes.
As shown in Figure 2, in the present embodiment, described isolation structure 20 includes two division boards, and two described division boards lay respectively at described recessed structure 18 and described recessed structure 19 places.The width of described recessed structure 18,19 matches with the thickness of described division board 20, and the length of described recessed structure 18,19 is greater than the width of described cavity space 20, and the height of described recessed structure 19 matches with the height of described cavity space 17.Described left plate 15, described right plate 16 are kept apart with magnetic in described cavity space 17.
Embodiment 2:
As shown in Figure 3, described isolation structure 20 is hollow cylindrical body, its cross section can be square or rectangular, and two opposite sides of described cylindrical body lay respectively in described recessed structure 18,19, and two other opposite side is close to the inner side of described front side board 13, described back side panel 14 respectively.Adopt the present embodiment, isolation structure 20 is done as a whole, be convenient to install.While adopting the present embodiment, described front side board 13 and described back side panel 14 need adaptive shortening length, expand the area of described die cavity 17, then described isolation structure 20 are placed on to the inwall of described die cavity 17, easy for installation.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (7)
1. there is the not mold for molding magnetic material powder of magnetic conduction isolation structure, it includes former, described former includes front side board (13), back side panel (14), left plate (15) and right plate (16), described front side board (13), described back side panel (14), described left plate (15) and described right plate (16) are around forming a die cavity (17), it is characterized in that, it also includes isolation structure (20), the side that described left plate (15) and described right plate (16) are positioned at die cavity (17) at it is equipped with the recessed structure matching with described isolation structure (20), described isolation structure (20) is positioned at described recessed structure, described isolation structure (20) is made for non-magnet_conductible material, the thickness of described isolation structure (20) is 4-30mm.
2. according to claim 1 have a not mold for molding magnetic material powder of magnetic conduction isolation structure, it is characterized in that, the thickness of described isolation structure (20) is 7-15mm.
3. according to the not mold for molding magnetic material powder of magnetic conduction isolation structure that has described in claim 1 or 2 any one, it is characterized in that, described isolation structure (20) is division board, and it includes two division boards.
4. according to the not mold for molding magnetic material powder of magnetic conduction isolation structure that has described in claim 1 or 2 any one, it is characterized in that, described isolation structure (20) is hollow cylindrical body, two opposite sides of described cylindrical body are positioned at described recessed structure, and two other opposite side is close to the inner side of described front side board, described back side panel respectively.
5. according to claim 1 have a not mold for molding magnetic material powder of magnetic conduction isolation structure, it is characterized in that, the width of described recessed structure matches with the thickness of described isolation structure (20).
6. according to claim 5 have a not mold for molding magnetic material powder of magnetic conduction isolation structure, it is characterized in that, the length of described recessed structure is greater than the width of described die cavity (17).
7. according to claim 6 have a not mold for molding magnetic material powder of magnetic conduction isolation structure, it is characterized in that, the height of described recessed structure matches with the height of described die cavity (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210374172.6A CN102847939B (en) | 2012-10-07 | 2012-10-07 | Magnetic material powder forming mold with non-magnetic isolating structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210374172.6A CN102847939B (en) | 2012-10-07 | 2012-10-07 | Magnetic material powder forming mold with non-magnetic isolating structure |
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| Publication Number | Publication Date |
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| CN102847939A CN102847939A (en) | 2013-01-02 |
| CN102847939B true CN102847939B (en) | 2014-11-19 |
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| CN201210374172.6A Active CN102847939B (en) | 2012-10-07 | 2012-10-07 | Magnetic material powder forming mold with non-magnetic isolating structure |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103264161A (en) * | 2013-06-06 | 2013-08-28 | 广元飞达模具制造有限公司 | Forming mold for rare earth highly magnetic product |
| CN103785829A (en) * | 2013-12-31 | 2014-05-14 | 昆山优磁电子有限公司 | Die for manufacturing magnetic cores |
| CN105081315A (en) * | 2015-08-25 | 2015-11-25 | 廊坊京磁精密材料有限公司 | Compression molding mold for sintered nd-fe-b |
| CN106601400B (en) * | 2016-12-10 | 2018-04-24 | 包头韵升强磁材料有限公司 | A kind of bulk neodymium iron boron preparation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH09225694A (en) * | 1996-02-22 | 1997-09-02 | Nippon Koshuha Kogyo Kk | Ring magnet forming device and its method |
| JPH10212502A (en) * | 1996-11-26 | 1998-08-11 | Aichi Steel Works Ltd | Preforming die |
| CN2561068Y (en) * | 2002-04-27 | 2003-07-16 | 北矿磁材科技股份有限公司 | Apparatus for reducing surface field strength difference of top and bottom surfaces for magnetic block |
| CN202291403U (en) * | 2011-10-28 | 2012-07-04 | 沈阳中北通磁科技股份有限公司 | Pressing and forming mould for neodymium-iron-boron cylinder |
| CN202779792U (en) * | 2012-10-07 | 2013-03-13 | 江西金力永磁科技有限公司 | Forming die with non-magnetic-conductive isolation structure for magnetic material powder |
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Owner name: JIANGXI JL PERMANENT MAGNET TECHNOLOGY CO., LTD. Free format text: FORMER NAME: JLMAG RARE-EARTH CO., LTD. |
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Address after: 341000 Jinling West Road, Ganzhou Development Zone, Ganzhou, Jiangxi Patentee after: JLMAG RARE-EARTH CO., LTD. Address before: Jinling West Road, Ganzhou Development Zone, Jiangxi Patentee before: Jiangxi Jinli Permanent Magnetic Technology Co.,Ltd. |