CN203711833U - Upper punch structure of annular die - Google Patents
Upper punch structure of annular die Download PDFInfo
- Publication number
- CN203711833U CN203711833U CN201320883922.2U CN201320883922U CN203711833U CN 203711833 U CN203711833 U CN 203711833U CN 201320883922 U CN201320883922 U CN 201320883922U CN 203711833 U CN203711833 U CN 203711833U
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- CN
- China
- Prior art keywords
- upper punch
- punch
- punch body
- ferrite
- die
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- Expired - Fee Related
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Abstract
The utility model provides an upper punch structure of an annular die. The upper punch structure comprises a fixed base and a punch body, wherein the punch body and the fixed base are vertically fixed. Screw holes are formed in the two sides of the fixed base. The punch body is of a cylindrical structure, and air holes are formed in the cylindrical wall of the punch body. According to the upper punch structure of the annular die, the air holes are formed in the cylindrical wall of the punch body, an overflowing channel is provided for air in the hole gaps of powder in the pressing process and air in blind holes of an upper punch through the air holes in the non-intrusion die area of the upper punch, the powder spraying phenomenon is avoided, the negative pressure adsorption phenomenon in the die releasing process is avoided, the appearance quality of blanks is guaranteed, and the phenomenon that the density of the blanks is not uniform can be avoided.
Description
Technical field
The utility model relates to magnetic core and manufactures field, especially a kind of ring mould upper punch structure.
Background technology
Ferrite Material (ferrite) is made up of the several oxide using ferric ion as main cation composition, and presents ferrimagnetism or anti-ferromagnetic material.
Ferrite Material is that one has ferromagnetic metal oxide.With regard to electrical characteristics, ferritic resistivity is more much bigger than metal, alloy magnetic material, and also has higher dielectric properties.Ferritic magnetic property has higher magnetic conductivity while also showing high frequency.Thereby ferrite has become the broad-spectrum nonmetal magnetic material in high frequency light current field.Because the magnetic energy storing in ferrite unit volume is lower, full close also lower (conventionally only have pure iron 1/3～1/5) of the intensity of magnetization, thereby limited it in the low frequency forceful electric power of the magnetic energy density of having relatively high expectations and the application in high-power field.
Ferrite Material is a kind of nonmetal magnetic material, and it is for example, to be formed by di-iron trioxide and one or more other metal oxides (: nickel oxide, zinc oxide, manganese oxide, magnesia, barium monoxide, strontium oxide strontia etc.) preparation sintering.Its relative permeability can be up to several thousand, and resistivity is 1011 times of metal, and eddy-current loss is little, is suitable for making high-frequency electromagnetic device.Ferrite has Hard Magnetic, soft magnetism, square magnetic, gyromagnet and pressure magnetic five classes.Be once called as ferrite or magnetic ferrites, its production process and outer appearnce be pottery seemingly, thereby also referred to as ferrite.Ferrite is the composite oxides of iron and other one or more suitable metallic element, and character belongs to semiconductor, and usually used as magnetic medium application, between ferrite magnetic material and metal or alloy magnetic material, most important difference is electric conductivity.Conventionally the former resistivity is 102～108 Ω cm, and the latter only has 10-6～10-4 Ω cm.Wherein, to mainly contain MnZn system, NiZn system, MgZn be three major types to soft magnetic ferrite; If press application characteristic parametric classification, can be divided into power ferrite material, high frequency ferrite material, high resistivity material, very high frequency(VHF) soft magnetic ferrite (hexaplanar high frequency ferrite), high frequency high power ferrite material etc.
MnZn based ferrite has high initial permeability, higher saturation induction density, there is low loss at radio intermediate frequency or low-frequency range, it is the best Ferrite Material of the following band limits magnetic property of 1 megahertz, conventional MnZn based ferrite initial permeability μ i=400-20000, saturation induction density Bs=400-530mT.The resistivity of MgZn series ferrite material is higher, is mainly used in the deflection coil magnetic core of making kinescope or display tube.
NiZn based ferrite frequency of utilization 100kHz～100MHz, the highest 300MHz that uses, this class permeability is lower, and resistivity is very high, is generally 105～107 Ω cm.Therefore, high-frequency vortex loss is little, is the excellent material of the above high band magnetic property of 1MHz, the magnetic conductivity μ i=5-1500 of conventional NiZn based material, saturation induction density Bs=250-400mT.
In recent years, along with the application of Ferrite Material is more and more extensive, Ferrite Material has been applied to the manufacture of various inductors, transformer, wave filter and choke coil, and as hyundai electronics message areas such as computer and external equipment, business automation equipment, digital communication and artificial traffic equipment, internet, household electrical appliance, electromagnetic compatibility equipment, green illumination device, industrial automations, and automobile, aviation, military field.
The mould of toroidal core, is made up of upper punch, low punch, die plate insert, and due to the existence of mould fuse, upper punch is also that tubular and one end are by base plate sealing (being convenient to and the attaching of lathe entablature).In pressing process, powder in die material chamber, in compression process, the interpore air of particle needs to discharge; Due to the intrusion of mould fuse, upper punch blind hole space diminishes, air also needs to discharge therebetween, therefore, when upper punch is invaded when die, and upper punch, die collective are while pressing down, have a large amount of gas to be overflowed by the gap between die and upper punch, form air-flow, cause a large amount of powders from its gap ejection simultaneously.Its result causes material chamber filler not full, formation green density is inhomogeneous, blank volume is larger, and molding thickness is larger, and this kind of phenomenon is more for serious, when the blank demoulding, due to the drop-down motion of die and fuse, in blank mesopore and upper punch blind hole, form negative pressure, in the time of upper punch and blank disengaging, because negative-pressure adsorption effect has a large amount of periphery dust colonies on blank, product is caused to bad order.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of ring mould upper punch structure.
For solving the problems of the technologies described above, the technical solution of the utility model is:
A kind of ring mould upper punch structure, comprises holder and punch body, and described punch body is vertical with holder fixing, and described holder both sides are provided with screw hole, and described punch body is cylinder-like structure, on the barrel of this punch body, is provided with pore.
Preferably, above-mentioned ring mould upper punch structure, described pore is near holder one side setting.
Preferably, above-mentioned ring mould upper punch structure, described pore quantity is 1.
The utility model structure has following beneficial effect:
Above-mentioned ring mould upper punch structure, by pore being set on the barrel of punch body, utilize the pore in this upper punch non-intruding die district, both the air during for compacting in the interpore air of powder and upper punch blind hole provides overflow channel, do not produce again Spray material phenomenon, when the demoulding, do not form negative-pressure adsorption phenomenon yet, both ensured blank presentation quality, be unlikely to produce green density non-uniform phenomenon yet.
Brief description of the drawings
Fig. 1 is the top view of ring mould upper punch structure described in the utility model;
Fig. 2 is the cross section view of the punch body of ring mould upper punch structure described in the utility model.
In figure: 1-holder 2-screw hole 3-punch body 4-pore
Detailed description of the invention
For further illustrating the utility model, now coordinate accompanying drawing to be described in detail:
As depicted in figs. 1 and 2, a kind of ring mould upper punch structure, comprise holder 1 and punch body 3, described punch body 3 is vertical with holder 1 fixing, described holder 1 both sides are provided with screw hole 2, described punch body 3 is cylinder-like structure, is provided with 1 pore 4 on the barrel of this punch body 3, and described pore 4 is near holder 1 one side settings.
The above is only preferred embodiment of the present utility model; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (3)
1. a ring mould upper punch structure, it is characterized in that: comprise holder and punch body, described punch body is vertical with holder fixing, and described holder both sides are provided with screw hole, described punch body is cylinder-like structure, on the barrel of this punch body, is provided with pore.
2. ring mould upper punch structure according to claim 1, is characterized in that: described pore is near holder one side setting.
3. ring mould upper punch structure according to claim 1, is characterized in that: described pore quantity is 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320883922.2U CN203711833U (en) | 2013-12-25 | 2013-12-25 | Upper punch structure of annular die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320883922.2U CN203711833U (en) | 2013-12-25 | 2013-12-25 | Upper punch structure of annular die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203711833U true CN203711833U (en) | 2014-07-16 |
Family
ID=51151033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320883922.2U Expired - Fee Related CN203711833U (en) | 2013-12-25 | 2013-12-25 | Upper punch structure of annular die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203711833U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107081425A (en) * | 2017-03-07 | 2017-08-22 | 郑州磨料磨具磨削研究所有限公司 | Mould and its pressure head component, pressure head |
-
2013
- 2013-12-25 CN CN201320883922.2U patent/CN203711833U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107081425A (en) * | 2017-03-07 | 2017-08-22 | 郑州磨料磨具磨削研究所有限公司 | Mould and its pressure head component, pressure head |
| CN107081425B (en) * | 2017-03-07 | 2019-09-27 | 郑州磨料磨具磨削研究所有限公司 | Molding die and its pressure head component, pressure head |
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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 |
Granted publication date: 20140716 Termination date: 20141225 |
|
| EXPY | Termination of patent right or utility model |