CN201768913U - Forming die of a metal powder annular magnetic core product - Google Patents
Forming die of a metal powder annular magnetic core product Download PDFInfo
- Publication number
- CN201768913U CN201768913U CN2010205207867U CN201020520786U CN201768913U CN 201768913 U CN201768913 U CN 201768913U CN 2010205207867 U CN2010205207867 U CN 2010205207867U CN 201020520786 U CN201020520786 U CN 201020520786U CN 201768913 U CN201768913 U CN 201768913U
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- lower punch
- male die
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Abstract
The utility model relates to a forming die of a metal powder annular magnetic core product, belonging to the mold manufacture technical field, mainly comprising an upper male die, a lower male die, a cavity die and a core rod, wherein the upper male die, the lower male die, the cavity die and the core rod are concentrically arranged to form a die cavity. The lower end surface of the upper male die is processed into a concave shape and the upper end surface of the lower male die is processed into a convex shaped by chamfering. During the forming process of the product, the lower male die top presses upwards to make the face pressure of the product uniform without the phenomena that the pressure in the middle part is small but the pressure in the edge part is large, thus the density of the blank product is uniform, so as to effectively eliminate the 'flaking' cracking phenomena when the products demold and increase the up-to-standard rate of the products.
Description
Technical field
The utility model relates to a kind of metal dust magnetic core product mould, more particularly relates to a kind of metal dust toroidal core formed product mould, belongs to the technology of die manufacturing field.
Background technology
Generally, the process of utilizing metal dust to make magnetic core product is earlier raw material ratio as required to be mixed and made into slip, drying was made metal dust after slip stirred, then the metal dust material is pressed into required blank product by mould, the blank product is placed on and sinters product in the stove into.The mould of prior art, as Fig. 1, the upper end end face of lower punch has the concave shape of being structure shape usually, at this moment, since the forming process of blank product be metal dust in die cavity by on punch suppress downwards, cause the center of pressure and the edge of the metal dust in the die cavity inhomogeneous, the annular blank product that is pressed into is that the density of center and peripheral is inconsistent naturally, that is to say that the marginal density that has formed toroidal core blank product is big and center density is little, as shown in Figure 2, thereby the annular blank product is easy to generate " aliquation " and cracking phenomena behind demoulding sintering, causes product percent of pass to reduce.
Summary of the invention
For solving the problems of the technologies described above, the utility model provides a kind of mould of the metal dust compacting toroidal core product that has improved, the center and peripheral density of annular blank product its end face that the mould that adopts this kind to improve is made is even, thereby, can not produce the problem of " aliquation " and cracking behind the annular blank product sintering, effectively improve the quality of product.
Above-mentioned technical purpose of the present utility model mainly is achieved through the following technical solutions: it mainly comprises punch; lower punch; die and core bar are formed; wherein; the die center is provided with through hole; the external diameter of last punch and lower punch projection equals the internal diameter of die through hole; last punch and lower punch center are provided with the through hole that internal diameter equates; in the through hole of lower punch core bar is set; the external diameter of core bar equals the internal diameter of punch or lower punch through hole, and lower punch, die and core bar are provided with common formation die cavity with one heart.Last punch lower end surface is processed into and is the concave shape shape and structure, lower punch upper end end face is processed into and is the convex shape and structure, toroidal core blank product pressing process is to remove punch earlier, retract punch again after adding to the metal dust material in the die cavity, at this moment, the downward compression moulding of last punch is removed punch after finishing moulding again, and this moment, lower punch upwards ejected shaped article to the die work top.Because lower punch upper end end face becomes the convex shape structure, in the formed product process, last punch compacting downwards makes that product end surface pressure is even, big and the little situation of center density of the marginal density that does not have a toroidal core blank product, thereby moulding annular blank product density is even, also can produce " aliquation " and cracking phenomena behind the toroidal core blank product stripping sintering, improve the qualification rate of product.
As preferably, described lower punch upper end end face is a convex, and the central angle alpha of its convex is controlled at 80 ° ~ 120 °.
As preferably, the convex shape of described lower punch upper end end face equates with the curvature of the concave of last punch lower end surface, and the blank product thickness that makes upper and lower punch cooperate to suppress is equal.
Description of drawings
Fig. 1 is the counterdie structural representation of prior art.
Fig. 2 is the sample blank schematic diagram of prior art compacting.
Fig. 3 is a mould installation diagram of the present utility model.
Fig. 4 is the sample blank schematic diagram of the utility model compacting.
The specific embodiment
Below by embodiment, and in conjunction with the accompanying drawings, technical solutions of the utility model are further described in detail.
Embodiment 1: as shown in Figure 3, magnetic core compacting tool set of the present utility model mainly comprises punch 5, lower punch 3, die 6 and core bar 4 are formed, wherein, die 6 centers are provided with through hole, the external diameter of last punch 5 and lower punch 3 equals the internal diameter of die 6, last punch 5 and lower punch 3 centers are provided with the through hole that internal diameter equates, core bar 4 is set in the through hole of lower punch 3, the external diameter of core bar 4 equals the internal diameter of punch 5 or lower punch 3 through holes, and last punch 5, lower punch 3, die 6 and core bar 4 are provided with common formation die cavity with one heart.Female shapes is processed in last punch 5 lower surfaces, and lower punch 3 upper end end faces are by being processed into convex shape, and the central angle alpha of its convex is 90 °.The convex of described lower punch 3 upper ends equates with the curvature of the concave panel of last punch 5 lower ends.In shaped article 7 pressing processes, remove punch 5 earlier, metal dust is added to retract punch 5 in the die cavity afterwards again, at this moment, by last punch 5 downward compression mouldings, remove punch 5 after finishing moulding, lower punch 3 upwards jack-up shaped article 7 to die 6 work tops.Because lower punch 3 upper surfaces are by being processed into convex shape, in the formed product process, last punch 5 downward compression mouldings, make that product end surface pressure is even, do not exist pressure big middle pressure in edge little, so shaped article 7 density are even, as shown in Figure 4, " aliquation " cracking phenomena takes place when having overcome product stripping effectively, has improved the qualification rate of product.
Claims (3)
1. the mould of a metal dust toroidal core product; mainly by last punch; lower punch; die and core bar are formed; wherein; the die center is provided with through hole; the external diameter of last punch and lower punch projection equals the internal diameter of die through hole; last punch and lower punch center are provided with the through hole that internal diameter equates; in the through hole of lower punch core bar is set, the external diameter of core bar equals the internal diameter of punch or lower punch through hole, lower punch; die and core bar are provided with common formation die cavity with one heart; it is characterized in that: go up the punch lower end surface and be processed into female shapes, lower punch upper end end face is processed into convex shape.
2. the mould of metal dust toroidal core product according to claim 1 is characterized in that: described lower punch upper end end face is a convex, and the central angle alpha of its convex is controlled at 80 ° ~ 120 °.
3. the mould of metal dust toroidal core product according to claim 1 and 2 is characterized in that: the described concave panel of going up the punch lower end surface equates with the curvature of the convex of lower punch upper end end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205207867U CN201768913U (en) | 2010-09-08 | 2010-09-08 | Forming die of a metal powder annular magnetic core product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205207867U CN201768913U (en) | 2010-09-08 | 2010-09-08 | Forming die of a metal powder annular magnetic core product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201768913U true CN201768913U (en) | 2011-03-23 |
Family
ID=43748746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205207867U Expired - Fee Related CN201768913U (en) | 2010-09-08 | 2010-09-08 | Forming die of a metal powder annular magnetic core product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201768913U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103273561A (en) * | 2013-06-06 | 2013-09-04 | 湖南省美程陶瓷科技有限公司 | Electronic ceramic dry-pressing die |
| CN103706788A (en) * | 2013-12-31 | 2014-04-09 | 昆山优磁电子有限公司 | EP type magnetic core die |
| CN103737962A (en) * | 2013-12-31 | 2014-04-23 | 昆山优磁电子有限公司 | Pressing mold of annular magnetic core |
| CN104368812A (en) * | 2014-11-28 | 2015-02-25 | 中核(天津)科技发展有限公司 | Pressing die for bonded neodymium-iron-boron magnetic body |
| CN110027094A (en) * | 2019-05-10 | 2019-07-19 | 江门市德盛高精密模具厂有限公司 | Ferrite bead radial direction wet pressing mold |
-
2010
- 2010-09-08 CN CN2010205207867U patent/CN201768913U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103273561A (en) * | 2013-06-06 | 2013-09-04 | 湖南省美程陶瓷科技有限公司 | Electronic ceramic dry-pressing die |
| CN103706788A (en) * | 2013-12-31 | 2014-04-09 | 昆山优磁电子有限公司 | EP type magnetic core die |
| CN103737962A (en) * | 2013-12-31 | 2014-04-23 | 昆山优磁电子有限公司 | Pressing mold of annular magnetic core |
| CN104368812A (en) * | 2014-11-28 | 2015-02-25 | 中核(天津)科技发展有限公司 | Pressing die for bonded neodymium-iron-boron magnetic body |
| CN110027094A (en) * | 2019-05-10 | 2019-07-19 | 江门市德盛高精密模具厂有限公司 | Ferrite bead radial direction wet pressing mold |
| CN110027094B (en) * | 2019-05-10 | 2023-11-14 | 黄群欢 | Ferrite magnetic ring radial wet pressing die |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110323 Termination date: 20180908 |