CN105729617B - A kind of injection molding forming method of 3D FERRITE COREs - Google Patents
A kind of injection molding forming method of 3D FERRITE COREs Download PDFInfo
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- CN105729617B CN105729617B CN201610113686.4A CN201610113686A CN105729617B CN 105729617 B CN105729617 B CN 105729617B CN 201610113686 A CN201610113686 A CN 201610113686A CN 105729617 B CN105729617 B CN 105729617B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
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- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
- C04B35/2658—Other ferrites containing manganese or zinc, e.g. Mn-Zn ferrites
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- C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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Abstract
The invention discloses a kind of injection molding forming methods of 3D FERRITE COREs, including：(1) binder of 70%~95% ferrite powder and 5%~30% is kneaded into pug after cooling and is broken into material, wherein, ferrite powder includes 60%~70% iron oxide, 8%~14% nickel oxide, 2%~10% copper oxide, 15%~25% zinc oxide, 0.05%~1% manganese oxide, 0.05%~1% bismuth oxide, 0.05%~1% silica, 0.05%~1% calcium oxide, 0.05%~1% diboron trioxide；Binder includes paraffin 40%~80%, polyethylene 5%~25%, polypropylene 5%~25%, dioctyl phthalate 1%~3%, dibutyl phthalate 1%~3% and oleic acid 2%~8%；(2) material is heated and is melted, by the material injection die cavity of melting, fill die cavity；(3) material is made to be solidified into FERRITE CORE green body in die cavity.Mechanical property by obtained 3D FERRITE COREs of the invention is better than traditional dry-pressing magnetic core, and the crystal grain of magnetic core is fine and close, tiny and uniform.
Description
Technical field
The present invention relates to the manufacturing methods of 3D FERRITE COREs, more particularly to a kind of injection molding of 3D FERRITE COREs
Method.
Background technology
The production Technology of conventional cores is mainly dry pressing, and the disadvantages of this method, which is the shape of shaped article, to be had
Larger limitation, mold cost is higher, and blank strength is low, and green body interior solid is inconsistent, and the uniformity of institutional framework is relatively
Difference etc., but since the structure of such 3D magnetic core is extremely complex, dry-pressing cannot be completed disposably, need first to be pressed into a simple base
Body, then not only increase process in this way, but also increase production cost and time at required shape with lathe process, to production
The problem of consistency of product is also not guaranteed, and Shooting Technique has disposably well solved this respect.
Invention content
The present invention proposes a kind of injection molding forming method of 3D FERRITE COREs, overcomes the shortcomings of existing dry-pressing formed technology,
The 3D FERRITE COREs molding for solving the problems, such as complicated shape, ensures the consistency of product, and improve production efficiency.
The technical problem of the present invention is resolved by technical solution below：
A kind of injection molding forming method of 3D FERRITE COREs, includes the following steps：
(1) bonding for being 5%~30% by ferrite powder and weight percent that weight percent is 70%~95%
Agent is kneaded into pug, is crushed after cooling and is obtained material；Wherein, the ferrite powder includes the group of following weight percent
Point：60%~70% iron oxide, 8%~14% nickel oxide, 2%~10% copper oxide, 15%~25% zinc oxide,
0.05%~1% manganese oxide, 0.05%~1% bismuth oxide, 0.05%~1% silica, 0.05%~1%
Calcium oxide, 0.05%~1% diboron trioxide；The binder includes following weight percentage components：Paraffin 40%
~80%, polyethylene 5%~25%, polypropylene 5%~25%, dioctyl phthalate 1%~3%, phthalic acid two
Butyl ester 1%~3% and oleic acid 2%~8%；
(2) material is heated and is melted, by the material injection die cavity of melting, fill die cavity；
(3) material is made to be solidified into FERRITE CORE green body in die cavity.
Further：
The pug being kneaded is broken into the material of 3~8mm of Ф in step (1).
In step (2), at 120~220 DEG C, the material is heated to fusing in injecting machine material tube, 50~
The material of melting is injected in die cavity under the pressure of 150Bar, fills die cavity.
It is a kind of for being molded the materials of 3D FERRITE COREs, which is characterized in that including weight percent be 70%~95%
Ferrite powder and weight percent be 5%~30% binder；Wherein, the ferrite powder includes following weight hundred
Divide the component of ratio：60%~70% iron oxide, 8%~14% nickel oxide, 2%~10% copper oxide, 15%~25%
Zinc oxide, 0.05%~1% manganese oxide, 0.05%~1% bismuth oxide, 0.05%~1% silica,
0.05%~1% calcium oxide, 0.05%~1% diboron trioxide；The binder includes the group of following weight percent
Point：Paraffin 40%~80%, polyethylene 5%~25%, polypropylene 5%~25%, dioctyl phthalate 1%~3%, neighbour
Dibatyl phithalate 1%~3% and oleic acid 2%~8%.
A kind of manufacturing method of 3D FERRITE COREs, including the ferrite that will be prepared through the injection molding forming method
Magnetic core green body obtains the FERRITE CORE by degreasing and sintering.
Further：
The degreasing includes the solvent degreasing carried out successively and thermal debinding.
The solvent degreasing includes bubble oil successively, dries and dry, and using kerosene as solvent, solution temperature is the bubble oil
30~90 DEG C, the time is 5~20 hours.
The thermal debinding carries out under the conditions of being warming up to 150~450 DEG C with the heating rate of 0.3~1.0 DEG C/min.
The sintering includes：
Temperature rise period：So that temperature is slowly raised to 400~500 DEG C from room temperature with 0.3~1.0 DEG C/min of heating rate, waits gluing
After tying agent discharge, with 1.0~2.0 DEG C/min of heating rate, it is continuously heating to 850~950 DEG C；
Blank gradually tapers up the stage：It is continuously heating to 1000~1100 DEG C with 0.5~1.5 DEG C/min of heating rate；
Holding stage：0.5~2.5h is kept the temperature at described 1000~1100 DEG C；
Temperature-fall period：After magnetic core is burned, cool down, cooling rate is 0.5~2.0 DEG C/min.
The solvent degreasing, thermal debinding and sintering carry out in natural air.
The beneficial effect of the present invention compared with the prior art is：
The 3D FERRITE COREs that the present invention has well solved such complicated shape using injection molding technique molding are asked
Topic, it is also guaranteed to the consistency of product, have production efficiency high, can be several with a mould or even more than ten, the degree of automation compared with
Height, artificial the advantages that lacking, and the density of product is big, density is uniform.The present invention settles production 3D magnetic cores at one go with Shooting Technique, and
It need not first be pressed into green body as traditional dry process, then cut again, the core structure is complicated and size is opposite
Larger, the discontinuity in dry-pressing, due to forming barometric gradient, when molding, necessarily has density gradient, causes in product
Portion will appear stress, and in cutting, product is susceptible to breakage or deviation.And Shooting Technique is to heat material to melt,
The material of melting is injected in die cavity under high pressure, after mould filling, mold is opened, takes out cured 3D magnetic core green bodies, magnetic core
Inside does not have stress, and molding settles at one go, need not cut.After sinter molding, mechanical property is than traditional dry-pressing magnetic core
It is better.In terms of the surface of product and internal microstructure, the crystal grain for being molded 3D magnetic cores is fine and close, tiny and uniform.Through the invention
The molding dry-pressing formed magnetic core of FERRITE CORE density ratio of method density higher, 3D FERRITE COREs mechanical strength is more
Height, magnetic core pendulum folding intensity higher.
Description of the drawings
Fig. 1 is the manufacturing approach craft flow chart of the 3D FERRITE COREs of the embodiment of the present invention.
Fig. 2 (a) and Fig. 2 (b) is the example arrangement schematic diagram for the 3D FERRITE COREs that the embodiment of the present invention makes.
Fig. 3 (a) and Fig. 3 (b) is the exemplary microcosmic grain structure for the 3D FERRITE COREs that the embodiment of the present invention makes.
Specific implementation mode
The present invention is explained in detail below against attached drawing and in conjunction with preferred embodiment.
The present invention provides a kind of injection molding production method of 3D FERRITE COREs green body, in one embodiment, packet
Include following steps：
(1) binder of 70%~95% ferrite powder and 5%~30% is kneaded into pug, is cooled to room
Wen Hou is broken into the material of 3~8mm of Ф, prepares for injection moulding；Wherein, the ferrite powder includes following weight hundred
Divide the component of ratio：60%~70% iron oxide, 8%~14% nickel oxide, 2%~10% copper oxide, 15%~25%
Zinc oxide, 0.05%~1% manganese oxide, 0.05%~1% bismuth oxide, 0.05%~1% silica,
0.05%~1% calcium oxide, 0.05%~1% diboron trioxide；The binder includes the group of following weight percent
Point：Paraffin 40%~80%, polyethylene 5%~25%, polypropylene 5%~25%, dioctyl phthalate 1%~3%, neighbour
Dibatyl phithalate 1%~3% and oleic acid 2%~8%；
(2) at 120~220 DEG C, the material is heated to fusing in injecting machine material tube, in the pressure of 50~150Bar
In the lower material injection die cavity by melting, die cavity is filled；
(3) after mould filling, the heat in material is conducted by mold, is opened mold, is taken out cured green body,
The as described FERRITE CORE green body.
Wherein, the piece material for being broken into 3~8mm of Ф is easier to enter injecting machine material tube injection moulding；In order to by material
It injects in die cavity, material is heated to fusing in injecting machine material tube, assembles, homogenize and pressurize by the reciprocating motion of screw rod
Material, forming process actually occur at screw rod toward being pushed forward, fused materials are injected in die cavity, and fluid is from nozzle out by pouring
Road, runner and cast gate fill die cavity, characteristic, the group of binder of the technological parameter setting therein dependent on ferrite powder in turn
At, the working condition etc. of the viscosity of material, mold design and injection molding machine, material is in barrel by external heater and screw machine
The acid extraction of the heat effect of tool, material answers abundance to allow it to be thoroughly plasticized completely, in forming process, should quickly control
System increases pressure and material is injected in die cavity, and inventor is by a large amount of experiment basis, selecting at 120~220 DEG C
Material is heated to fusing in injecting machine material tube, injects the material of melting in die cavity under the pressure of 50~150Bar, filling
Die cavity, melt flow increase with cavity pressure and are reduced, and when mixture cools down in a mold, stowing operation terminates, mould
After chamber filling, the heat in material is conducted by mold, is opened mold, is taken out cured green body.
It when injection molding, can be used using incision technology in mould, product and regrinding-material have just detached in a mold, using certainly
Product and regrinding-material are taken out by manipulator, are realized separated by the mode of dynamicization.
In molding, the sliding block on mold both sides is linked together by guide post, and the feeding of melting is molded into die cavity, is filled out
Mold filling chamber opens mold after cured, and sliding block is automatically separated, and thimble ejects product.It need not cut, settle at one go to be formed
Required groove, both shortens processing procedure in this way, in turn avoids cutting dimensional accuracy, cuts generation stress, and product is broken etc.
Bad phenomenon.
The present invention also provides a kind of manufacturing methods of 3D FERRITE COREs, in one embodiment, specific referring to Fig. 1
Include the following steps：
The FERRITE CORE green body that manufacturing method through above-described embodiment is prepared passes through solvent degreasing, heat successively
Degreasing and sintering obtain the FERRITE CORE；
The solvent degreasing includes bubble oil successively, dries and dry, and using kerosene as solvent, solution temperature is the bubble oil
30~90 DEG C, the time is 5~20 hours, to remove portion of binder；
The thermal debinding carries out under the conditions of being warming up to 150~450 DEG C with the heating rate of 0.3~1.0 DEG C/min, to remove
Remove more binders.
Wherein, solvent degreasing refers to dissolving the dissolvable ingredient in binder in green body inside solvent penetration to green body
Process out.Solvent degreasing cannot dissolve out whole binders, only after dissolving most binder, form intercommunicating pore
The network of gap can shorten heating and soaking time in thermal debinding afterwards, molten to achieve the purpose that reduce total degreasing time
The characteristics of solving degreasing is that temperature is low, degreasing is carried out under binder softening point, it is ensured that green body is indeformable.Solvent selection is general
It is the dissolving of one step of single solvent to screen various solvent solution rates, inventor is through excessive to shorten degreasing time
On the basis of amount experiment, select using kerosene as solvent, solution temperature is at 30~90 DEG C, and the time was at 5~20 hours.
Solvent degreasing device is made of water-bath, water bath and heating and temperature control system.Green body is immersed in and fills with coal
It in the water-bath of oil, is heated by water bath bottom resistance silk, the water in water bath reaches certain temperature so that in water-bath
The temperature of kerosene rise to 30~90 DEG C, dissolve the paraffin constituent element in binder, achieve the purpose that preliminary degreasing.
Thermal debinding be green body is heated in air binder component volatilization or decompose temperature so that binder by
States of matter variation occurs for thermal decomposition, is changed into gaseous material, achievees the purpose that degreasing.When temperature is relatively low, it is de- to realize that part is evaporated
It removes, temperature rises on binder decomposition temperature, and reaction of decomposing removes more binders.Inventor is by a large amount of
Experiments have shown that when thermal debinding carries out under the conditions of being warming up to 150~450 DEG C with the heating rate of 0.3~1.0 DEG C/min, product
It is not likely to produce deformation or defect.
In a preferred embodiment, described be sintered includes：
Temperature rise period：Slowly heat up, with 0.3~1.0 DEG C/min of heating rate make temperature be slowly raised to 400 from room temperature~
500 DEG C, after to be bonded dose of discharge, with 1.0~2.0 DEG C/min of heating rate, it is continuously heating to 850~950 DEG C；
Blank gradually tapers up the stage：It is continuously heating to 1000~1100 DEG C with 0.5~1.5 DEG C/min of heating rate；
Holding stage：0.5~2.5h is kept the temperature at described 1000~1100 DEG C；
Temperature-fall period：After magnetic core is burned, cool down, cooling rate is 0.5~2.0 DEG C/min.
Sintering directly the decision final composition of FERRITE CORE, the distribution of phase, grain size, compactness, size, appearance and
Performance.Sintering should be according to agglomerating plant used, calcined temperature height, the shrinkage of Preburning material, the type of binder and addition ratio
The difference of example, properties of product requirement, form and dimension, dress base weight and mode etc., determines suitable sintering temperature and burning
Tie curve, inventor on a large amount of experiment basis, in the above preferred embodiment obtained temperature rise period be mainly moisture in blank,
The volatilization process of binder and lubricant must slowly heat up crack to avoid blank at this time, hereafter be that blank gradually tapers up the stage,
Since this section of firing affects size, the uniformity, the porosity and the distribution etc. of magnetic core crystal grain, heating rate at this time will fit
When；To after maximum sintering temperature, 0.5~2.5h of heat preservation is advisable；In temperature-fall period, electromagnetic performance and conjunction of the cooling rate to product
Lattice rate also has a significant impact.
By the above preferred sintering circuit, product there's almost no viscous connection, deformation and cracking, and the external form ruler of product
Very little and performance consistency is met the requirements.
Preferably, the solvent degreasing, thermal debinding and sintering carry out in natural air.
Shown in the example of the 3D FERRITE COREs made according to embodiments of the present invention such as Fig. 2 (a) and Fig. 2 (b).
The present invention is further elaborated below by way of more specific embodiment.
Embodiment 1
The pellet of injection moulding, by forming following weight percentage components：
Ferrite powder 70%
Binder 30%
The ferrite powder by forming following weight percentage components：
The binder by forming following weight percentage components：
It is put into mixing in mixer according to the mixing of the above weight percent, the frequency of blender is arranged in 180 DEG C of set temperature
For 25Hz, after forty minutes per mixing, stirring 1 time, altogether stirring obtain cake mass 4 times.It waits for that pug is cooled to room temperature, uses pulverizer
It is crushed to the material that average grain diameter is 8mm.
At 180 DEG C, the material is heated to fusing in injecting machine material tube, by the object of melting under the pressure of 125Bar
In material injection die cavity, die cavity is filled；After mould filling, the heat in material is conducted by mold, opens mold, is taken out
Cured green body, the as described FERRITE CORE green body.
FERRITE CORE green body obtains the FERRITE CORE by solvent degreasing, thermal debinding and sintering successively；
The solvent degreasing includes bubble oil successively, dries and dry, and using kerosene as solvent, solution temperature is the bubble oil
55 DEG C, the time is 10 hours, to remove portion of binder；
The thermal debinding carries out under the conditions of being warming up to 450 DEG C with the heating rate of 0.5 DEG C/min, more viscous to remove
Tie agent.
The sintering includes：
Temperature rise period：It slowly heats up, so that temperature is slowly raised to 450 DEG C from room temperature with 0.5 DEG C/min of heating rate, it is to be bonded
After agent discharge, with 1.5 DEG C/min of heating rate, it is continuously heating to 900 DEG C；
Blank gradually tapers up the stage：It is continuously heating to 1020 DEG C with 1 DEG C/min of heating rate；
Holding stage：2h is kept the temperature at described 1020 DEG C；
Temperature-fall period：After magnetic core is burned, cool down, cooling rate is 1.5 DEG C/min.
Embodiment 2
The pellet of injection moulding, by forming following weight percentage components：
Ferrite powder 80%
Binder 20%
The ferrite powder by forming following weight percentage components：
The binder by forming following weight percentage components：
It is put into mixing in mixer according to the mixing of the above weight percent, the frequency of blender is arranged in 180 DEG C of set temperature
For 25Hz, after forty minutes per mixing, stirring 1 time, altogether stirring obtain cake mass 4 times.It waits for that pug is cooled to room temperature, uses pulverizer
It is crushed to the material that average grain diameter is 8mm.
At 180 DEG C, the material is heated to fusing in injecting machine material tube, by the object of melting under the pressure of 125Bar
In material injection die cavity, die cavity is filled；After mould filling, the heat in material is conducted by mold, opens mold, is taken out
Cured green body, the as described FERRITE CORE green body.
FERRITE CORE green body obtains the FERRITE CORE by solvent degreasing, thermal debinding and sintering successively；
The solvent degreasing includes bubble oil successively, dries and dry, and using kerosene as solvent, solution temperature is the bubble oil
55 DEG C, the time is 10 hours, to remove portion of binder；
The thermal debinding carries out under the conditions of being warming up to 450 DEG C with the heating rate of 0.5 DEG C/min, more viscous to remove
Tie agent.
The sintering includes：
Temperature rise period：It slowly heats up, so that temperature is slowly raised to 450 DEG C from room temperature with 0.5 DEG C/min of heating rate, it is to be bonded
After agent discharge, with 1.5 DEG C/min of heating rate, it is continuously heating to 900 DEG C；
Blank gradually tapers up the stage：It is continuously heating to 1050 DEG C with 1 DEG C/min of heating rate；
Holding stage：2h is kept the temperature at described 1050 DEG C；
Temperature-fall period：After magnetic core is burned, cool down, cooling rate is 1.5 DEG C/min.
Embodiment 3
The pellet of injection moulding, by forming following weight percentage components：
Ferrite powder 90%
Binder 10%
The ferrite powder by forming following weight percentage components：
The binder by forming following weight percentage components：
It is put into mixing in mixer according to the mixing of the above weight percent, the frequency of blender is arranged in 180 DEG C of set temperature
For 25Hz, after forty minutes per mixing, stirring 1 time, altogether stirring obtain cake mass 4 times.It waits for that pug is cooled to room temperature, uses pulverizer
It is crushed to the material that average grain diameter is 8mm.
At 180 DEG C, the material is heated to fusing in injecting machine material tube, by the object of melting under the pressure of 125Bar
In material injection die cavity, die cavity is filled；After mould filling, the heat in material is conducted by mold, opens mold, is taken out
Cured green body, the as described FERRITE CORE green body.
FERRITE CORE green body obtains the FERRITE CORE by solvent degreasing, thermal debinding and sintering successively；
The solvent degreasing includes bubble oil successively, dries and dry, and using kerosene as solvent, solution temperature is the bubble oil
55 DEG C, the time is 10 hours, to remove portion of binder；
The thermal debinding carries out under the conditions of being warming up to 450 DEG C with the heating rate of 0.5 DEG C/min, more viscous to remove
Tie agent.
The sintering includes：
Temperature rise period：It slowly heats up, so that temperature is slowly raised to 450 DEG C from room temperature with 0.5 DEG C/min of heating rate, it is to be bonded
After agent discharge, with 1.5 DEG C/min of heating rate, it is continuously heating to 900 DEG C；
Blank gradually tapers up the stage：It is continuously heating to 1050 DEG C with 1 DEG C/min of heating rate；
Holding stage：2h is kept the temperature at described 1050 DEG C；
Temperature-fall period：After magnetic core is burned, cool down, cooling rate is 1.5 DEG C/min.
The 3D FERRITE COREs produced to above three embodiments are tested for the property, with traditional dry-pressing formed method
The 3D FERRITE COREs of production are compared, as shown in the table：
Micro-Structure Analysis is carried out to injection molding 3D magnetic cores, as shown in Fig. 3 (a) and Fig. 3 (b), Fig. 3 (a) is that magnetic core surface is micro-
Structure is seen, Fig. 3 (b) is magnetic core section microstructure, as can be seen that the crystal grain of injection molding 3D magnetic cores is fine and close, tiny and equal from figure
One.
By embodiment 1-3 testing results it is found that being produced with the pellet of 3D FERRITE COREs injection moulding of the present invention
Magnetic core mechanical property and thermal shock performance are all got well than the magnetic core that traditional dry compression methodology is produced, and magnetic core density is also greater than biography
The magnetic core density that the dry compression methodology of system is produced.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
The specific implementation of the present invention is confined to these explanations.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, several equivalent substitute or obvious modifications is made, and performance or use is identical, all should
It is considered as belonging to protection scope of the present invention.
Claims (10)
1. a kind of injection molding forming method of 3D FERRITE COREs, which is characterized in that include the following steps：
(1) by ferrite powder and weight percent that weight percent is 70%~95% be 5%~30% binder into
Row is kneaded into pug, is crushed after cooling and is obtained material；Wherein, the ferrite powder includes following weight percentage components：
60%~70% iron oxide, 8%~14% nickel oxide, 2%~10% copper oxide, 15%~25% zinc oxide,
0.05%~0.1% manganese oxide, 0.05%~0.1% bismuth oxide, 0.05%~0.1% silica,
0.05%~0.1% calcium oxide, 0.05%~0.1% diboron trioxide；The binder includes following weight percent
Component：Paraffin 40%~80%, polyethylene 5%~25%, polypropylene 5%~25%, dioctyl phthalate 1%~
3%, dibutyl phthalate 1%~3% and oleic acid 2%~8%；
(2) material is heated and is melted, by the material injection die cavity of melting, fill die cavity；
(3) material is made to be solidified into FERRITE CORE green body in die cavity.
2. the manufacturing method of FERRITE CORE as described in claim 1, which is characterized in that the mud that will be kneaded in step (1)
Material is broken into the material of 3~8mm of Ф.
3. the manufacturing method of FERRITE CORE as described in claim 1, which is characterized in that in step (2), at 120~220 DEG C
Under, the material is heated to fusing in injecting machine material tube, the material of melting is injected into die cavity under the pressure of 50~150Bar
In, fill die cavity.
4. a kind of for being molded the materials of 3D FERRITE COREs, which is characterized in that including weight percent be 70%~95%
The binder that ferrite powder and weight percent are 5%~30%；Wherein, the ferrite powder includes following weight percent
The component of ratio：60%~70% iron oxide, 8%~14% nickel oxide, 2%~10% copper oxide, 15%~25%
Zinc oxide, 0.05%~0.1% manganese oxide, 0.05%~0.1% bismuth oxide, 0.05%~0.1% titanium dioxide
Silicon, 0.05%~0.1% calcium oxide, 0.05%~0.1% diboron trioxide；The binder includes following weight percent
The component of ratio：Paraffin 40%~80%, polyethylene 5%~25%, polypropylene 5%~25%, dioctyl phthalate 1%~
3%, dibutyl phthalate 1%~3% and oleic acid 2%~8%.
5. a kind of manufacturing method of 3D FERRITE COREs, which is characterized in that including will be through claims 1 to 3 any one of them
The FERRITE CORE green body that injection molding forming method is prepared obtains the FERRITE CORE by degreasing and sintering.
6. the manufacturing method of FERRITE CORE as claimed in claim 5, which is characterized in that the degreasing includes carrying out successively
Solvent degreasing and thermal debinding.
7. the manufacturing method of FERRITE CORE as claimed in claim 6, which is characterized in that the solvent degreasing includes bubble successively
Oil is dried and is dried, and for the bubble oil using kerosene as solvent, solution temperature is 30~90 DEG C, and the time is 5~20 hours.
8. such as the manufacturing method of claim 6 to 7 any one of them FERRITE CORE, which is characterized in that the thermal debinding exists
It is carried out under the conditions of being warming up to 150~450 DEG C with the heating rate of 0.3~1.0 DEG C/min.
9. such as the manufacturing method of claim 5 to 7 any one of them FERRITE CORE, which is characterized in that the sintering includes：
Temperature rise period：Temperature is set to be slowly raised to 400~500 DEG C, to be bonded dose from room temperature with 0.3~1.0 DEG C/min of heating rate
After discharge, with 1.0~2.0 DEG C/min of heating rate, it is continuously heating to 850~950 DEG C；
Blank gradually tapers up the stage：It is continuously heating to 1000~1100 DEG C with 0.5~1.5 DEG C/min of heating rate；
Holding stage：0.5~2.5h is kept the temperature at described 1000~1100 DEG C；
Temperature-fall period：After magnetic core is burned, cool down, cooling rate is 0.5~2.0 DEG C/min.
10. such as the manufacturing method of claim 6 to 7 any one of them FERRITE CORE, which is characterized in that the solvent is de-
Fat, thermal debinding and sintering carry out in natural air.
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