CN105729617A - Injection molding method of 3D ferrite core - Google Patents
Injection molding method of 3D ferrite core Download PDFInfo
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- CN105729617A CN105729617A CN201610113686.4A CN201610113686A CN105729617A CN 105729617 A CN105729617 A CN 105729617A CN 201610113686 A CN201610113686 A CN 201610113686A CN 105729617 A CN105729617 A CN 105729617A
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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
- B28B1/54—Producing shaped prefabricated articles from the material specially adapted for producing articles from molten material, e.g. slag refractory ceramic materials
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- 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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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- 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
- C04B35/2666—Other ferrites containing nickel, copper or cobalt
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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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- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
Abstract
The invention discloses an injection molding method of a 3D ferrite core. The injection molding method comprises the steps of (1) mixing 70% to 95% of ferrite powder with 5% to 30% of a binder into a mud material, cooling, and crushing into materials, wherein the ferrite powder comprises 60% to 70% of ferrite, 8% to 14% of nickel oxide, 2% to 10% of copper oxide, 15% to 25% of zinc oxide, 0.05% to 1% of manganese oxide, 0.05% to 1% of bismuth trioxide, 0.05% to 1% of silicon dioxide, 0.05% to 1% of calcium oxide and 0.05% to 1% of diboron trioxide; and the binder comprises 40% to 80% of paraffin, 5% to 25% of polyethylene, 5% to 25% of polypropylene, 1% to 3% of dioctyl phthalate, 1% to 3% of dibutyl phthalate and 2% to 8% of oleic acid; (2) heating the materials for melting, injecting the melted materials into a die cavity, and filling the die cavity; and (3) solidifying the materials in the die cavity to form a ferrite core green body. According to the injection molding method, the mechanical property of the 3D ferrite core obtained through the method is better than that of a traditional dry pressing magnetic core, and the crystal particles of the core are compact, fine and uniform.
Description
Technical field
The present invention relates to the manufacture method of 3D FERRITE CORE, particularly relate to the injection molding forming method of a kind of 3D FERRITE CORE.
Background technology
The production Technology of conventional cores is mainly dry pressing, the shape that the shortcoming of the method is shaped article has bigger restriction, mould cost is higher, blank strength is low, base substrate interior solid is inconsistent, the uniformity of organizational structure is relatively poor etc., again owing to the structure of such 3D magnetic core is extremely complex, dry-pressing can not disposable complete, need first to be pressed into a simple base substrate, required shape is become again with lathe process, so not only increase operation, and add production cost and time, to the concordance of product also without guarantee, the disposable problem solving this respect well of Shooting Technique.
Summary of the invention
The present invention proposes the injection molding forming method of a kind of 3D FERRITE CORE, overcomes the deficiency of existing dry-pressing formed technology, the problem solving the 3D FERRITE CORE molding of complicated shape, it is ensured that the concordance of product, and improves production efficiency.
The technical problem of the present invention is solved by following technical scheme:
The injection molding forming method of a kind of 3D FERRITE CORE, comprises the steps:
(1) ferrite powder that percentage by weight is 70%～95% is carried out with the binding agent that percentage by weight is 5%～30% mixing become pug, broken after cooling obtain material；Wherein, described ferrite powder includes the component of following percentage by weight: the ferrum oxide of 60%～70%, the nickel oxide of 8%～14%, the copper oxide of 2%～10%, the zinc oxide of 15%～25%, the manganese oxide of 0.05%～1%, the bismuth oxide of 0.05%～1%, the silicon dioxide of 0.05%～1%, the calcium oxide of 0.05%～1%, the diboron trioxide of 0.05%～1%；Described binding agent includes the component of following percentage by weight: paraffin 40%～80%, polyethylene 5%～25%, polypropylene 5%～25%, dioctyl phthalate 1%～3%, dibutyl phthalate 1%～3% and oleic acid 2%～8%；
(2) described heating material is melted, melted material is injected in die cavity, fill die cavity；
(3) described material is made to be solidified into FERRITE CORE base substrate in die cavity.
Further:
The pug of mixing one-tenth is broken into the material of Ф 3～8mm by step (1).
In step (2), at 120～220 DEG C, described material is added heat fusing in injecting machine material tube, under the pressure of 50～150Bar, melted material is injected in die cavity, fill die cavity.
A kind of material for molding 3D FERRITE CORE, it is characterised in that include ferrite powder that percentage by weight is 70%～95% and percentage by weight is the binding agent of 5%～30%；Wherein, described ferrite powder includes the component of following percentage by weight: the ferrum oxide of 60%～70%, the nickel oxide of 8%～14%, the copper oxide of 2%～10%, the zinc oxide of 15%～25%, the manganese oxide of 0.05%～1%, the bismuth oxide of 0.05%～1%, the silicon dioxide of 0.05%～1%, the calcium oxide of 0.05%～1%, the diboron trioxide of 0.05%～1%；Described binding agent includes the component of following percentage by weight: paraffin 40%～80%, polyethylene 5%～25%, polypropylene 5%～25%, dioctyl phthalate 1%～3%, dibutyl phthalate 1%～3% and oleic acid 2%～8%.
The manufacture method of a kind of 3D FERRITE CORE, including the FERRITE CORE base substrate that will prepare through described injection molding forming method, obtains described FERRITE CORE through defat and sintering.
Further:
Described defat includes the solvent degreasing and the thermal debinding that are sequentially carried out.
Described solvent degreasing includes bubble oil successively, dries and dry, and described bubble oil is using kerosene as solvent, and solution temperature is 30～90 DEG C, and the time is 5～20 hours.
Described thermal debinding carries out being warming up under 150～450 DEG C of conditions with the programming rate of 0.3～1.0 DEG C/min.
Described sintering includes:
Temperature rise period: make temperature be slowly raised to 400～500 DEG C from room temperature with 0.3～1.0 DEG C/min of heating rate, 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: be continuously heating to 1000～1100 DEG C with 0.5～1.5 DEG C/min of heating rate；
Holding stage: be incubated 0.5～2.5h at described 1000～1100 DEG C；
Temperature-fall period: after magnetic core is burned, lower the temperature, cooldown rate is 0.5～2.0 DEG C/min.
Described solvent degreasing, thermal debinding and sintering all carry out in natural air.
The present invention is compared with the prior art and provides the benefit that:
The present invention adopts injection molding technique to solve the problem of 3D FERRITE CORE molding of this type of complicated shape well, the concordance of product is also guaranteed, there is production efficiency height, can several even tens an of mould, automaticity is higher, the advantage such as artificial few, and the density of product is big, density is homogeneous.Present invention Shooting Technique settles production 3D magnetic core at one go, without as traditional dry process, first being pressed into base substrate, then cut again, this core structure is complicated and relatively large sized, the discontinuity when dry-pressing, owing to forming barometric gradient, necessarily have density gradient during molding, cause that interiors of products there will be stress, when cutting, easily there is breakage or off normal in product.And Shooting Technique is to be melted by heating material, under high pressure melted material is injected in die cavity, after mould filling, open mould, take out cured 3D magnetic core base substrate, inside magnetic core, there is no stress, and molding settles at one go, it is not necessary to cutting.After sinter molding, mechanical property is better than traditional dry-pressing magnetic core.From the surface of product and internal microstructure, the crystal grain of injection moulding 3D magnetic core is fine and close, tiny and homogeneous.Higher by the density of the dry-pressing formed magnetic core of the FERRITE CORE density ratio of the method molding of the present invention, 3D FERRITE CORE mechanical strength is higher, and magnetic core pendulum folding intensity is higher.
Accompanying drawing explanation
Fig. 1 is the manufacturing approach craft flow chart of the 3D FERRITE CORE of the embodiment of the present invention.
The example arrangement schematic diagram of the 3D FERRITE CORE that Fig. 2 (a) and Fig. 2 (b) makes for the embodiment of the present invention.
The exemplary microcosmic grainiess of the 3D FERRITE CORE that Fig. 3 (a) and Fig. 3 (b) makes for the embodiment of the present invention.
Detailed description of the invention
Below against accompanying drawing and the present invention being explained in detail in conjunction with preferred embodiment.
The present invention provides the injection molding production method of a kind of 3D FERRITE CORE base substrate, and in one embodiment, it comprises the steps:
(1) binding agent of the ferrite powder of 70%～95% and 5%～30% is carried out mixing one-tenth pug, after being cooled to room temperature, be broken into the material of Ф 3～8mm, prepare for injection moulding；Wherein, described ferrite powder includes the component of following percentage by weight: the ferrum oxide of 60%～70%, the nickel oxide of 8%～14%, the copper oxide of 2%～10%, the zinc oxide of 15%～25%, the manganese oxide of 0.05%～1%, the bismuth oxide of 0.05%～1%, the silicon dioxide of 0.05%～1%, the calcium oxide of 0.05%～1%, the diboron trioxide of 0.05%～1%；Described binding agent includes the component of following percentage by weight: paraffin 40%～80%, polyethylene 5%～25%, polypropylene 5%～25%, dioctyl phthalate 1%～3%, dibutyl phthalate 1%～3% and oleic acid 2%～8%；
(2) at 120～220 DEG C, described material is added heat fusing in injecting machine material tube, under the pressure of 50～150Bar, melted material is injected in die cavity, fill die cavity；
(3) after mould filling, the heat in material is conducted by mould, opens mould, takes out cured base substrate, is described FERRITE CORE base substrate.
Wherein, the piece material being broken into Ф 3～8mm is easier to enter injecting machine material tube injection moulding；nullIn order to material is injected in die cavity，Material is added in injecting machine material tube heat fusing，Assembled by the reciprocating motion of screw rod、Homogenization and pressurization material，Forming process actually occurs at screw rod and pushes away forward，Fused materials is injected in die cavity，Fluid from nozzle out through running channel、Runner and cast gate and then fill die cavity，Technological parameter therein arranges the characteristic depending on ferrite powder、The composition of binding agent、The viscosity of material、The working condition etc. of Design of Dies and injection machine，Material is subject to the heat effect of external heater and screw rod mechanism in barrel，The acid extraction of material should fill and be sufficient for it and thoroughly plastify completely，In forming process，Answer quick control to increase pressure material is injected in die cavity，Inventor is on substantial amounts of experiment basis，Select when material being added in injecting machine material tube heat fusing at 120～220 DEG C，Under the pressure of 50～150Bar, melted material is injected in die cavity，Fill die cavity，Melt flow increases with cavity pressure and reduces，When compound cools down in a mold，Stowing operation terminates，After mould filling，Heat in material is conducted by mould，Open mould，Take out cured base substrate.
During injection mo(u)lding, incision technology in mould, product and regrinding-material can be adopted just separated in a mold, adopt the mode of automatization, by mechanical hand, product and regrinding-material be taken out, it is achieved separated.
When matched moulds, the slide block on mould both sides is linked together by guide pillar, is injected in die cavity by melted feeding, fills die cavity, after cured, opens mould, and slide block is automatically separated, and product is ejected by thimble.Need not cut, settle at one go and form required groove, so both shorten processing procedure, turn avoid cutting dimensional accuracy, cutting generation stress, the bad phenomenon such as product is broken.
The present invention also provides for the manufacture method of a kind of 3D FERRITE CORE, and referring to Fig. 1, in one embodiment, it specifically includes following steps:
FERRITE CORE base substrate manufacture method through above-described embodiment prepared, sequentially passes through solvent degreasing, thermal debinding and sintering and obtains described FERRITE CORE；
Described solvent degreasing includes bubble oil successively, dries and dry, and described bubble oil is using kerosene as solvent, and solution temperature is 30～90 DEG C, and the time is 5～20 hours, to remove portion of binder；
Described thermal debinding carries out being warming up under 150～450 DEG C of conditions with the programming rate of 0.3～1.0 DEG C/min, to remove more binding agent.
Wherein, solvent degreasing refers to that solvent penetration is inside base substrate, the process being dissolved out by the solubilized composition in binding agent in base substrate.Solvent degreasing can not the whole binding agent of dissolution, simply after dissolving most binding agent, form the network of interconnected pore, thermal debinding afterwards can shorten intensification and temperature retention time, to reach to reduce the purpose of total degreasing time, the feature dissolving defat is that temperature is low, carries out defat, it is ensured that base substrate is indeformable under binding agent softening point.Solvent selects to be usually single solvent one step and dissolves, and for shortening degreasing time, need to various solvent dissolution velocities be screened, and inventor, on the basis of great many of experiments, is selecting to adopt kerosene as solvent, and solution temperature is at 30～90 DEG C, and the time was at 5～20 hours.
Solvent degreasing device is made up of water-bath, water bath and heating and temperature control system.Base substrate is immersed in the water-bath filling with kerosene, being heated by water bath bottom resistance silk, the water in water bath reaches certain temperature so that the temperature of the kerosene in water-bath rises to 30～90 DEG C, dissolve the paraffin constituent element in binding agent, reach the purpose of preliminary defat.
Thermal debinding is that base substrate is heated to binder component volatilization or the temperature decomposed in atmosphere so that binding agent decomposes generation states of matter changes, and is changed into gaseous material, reaches the purpose of defat.When temperature is relatively low, it is achieved part evaporates elimination, and temperature rises on binder decomposed temperature, reaction of decomposing, and removes more binding agent.Inventor through substantial amounts of experiment prove thermal debinding be warming up to the programming rate of 0.3～1.0 DEG C/min carry out under 150～450 DEG C of conditions time, product be not likely to produce deformation or defect.
In a preferred embodiment, described sintering includes:
Temperature rise period: slowly heat up, make temperature be slowly raised to 400～500 DEG C from room temperature with 0.3～1.0 DEG C/min of heating rate, after to be bonded dose of discharge, with 1.0～2.0 DEG C/min of heating rate, be continuously heating to 850～950 DEG C；
Blank gradually tapers up the stage: be continuously heating to 1000～1100 DEG C with 0.5～1.5 DEG C/min of heating rate；
Holding stage: be incubated 0.5～2.5h at described 1000～1100 DEG C；
Temperature-fall period: after magnetic core is burned, lower the temperature, cooldown rate is 0.5～2.0 DEG C/min.
Sintering directly determines the final composition of FERRITE CORE, the distribution of phase, grain size, compactness, size, outward appearance and performance.Sintering should according to agglomerating plant used, calcined temperature height, the contractility of Preburning material, the kind of binding agent and additional proportion, properties of product requirement, form and dimension, the difference of the dress aspect such as base weight and mode, determine suitable sintering temperature and sintering curre, inventor is on substantial amounts of experiment basis, in the above preferred version drawn, the temperature rise period is mainly in blank moisture, the volatilization process of binding agent and lubricant, now must slowly heat up to avoid blank to ftracture, hereafter it is that blank gradually tapers up the stage, owing to this section burns till the size affecting magnetic core crystal grain, the uniformity, the porosity and distribution etc., heating rate now is wanted suitably；After most high sintering temperature, insulation 0.5～2.5h is advisable；At temperature-fall period, electromagnetic performance and the qualification rate of product are also had a significant impact by cooldown rate.
By above preferred sintering circuit, connection, deformation and cracking are glued in there's almost no of product, and the concordance of the overall dimensions of product and performance meets requirement.
Preferably, described solvent degreasing, thermal debinding and sintering all carry out in natural air.
Shown in the example such as Fig. 2 (a) and Fig. 2 (b) of the 3D FERRITE CORE made according to embodiments of the present invention.
Below by way of embodiment more specifically, the present invention is further elaborated.
Embodiment 1
The pellet of injection moulding, is made up of the component of following percentage by weight:
Ferrite powder 70%
Binding agent 30%
Described ferrite powder is made up of the component of following percentage by weight:
Described binding agent is made up of the component of following percentage by weight:
Putting into banburying in banbury, design temperature 180 DEG C according to the mixing of above percentage by weight, the frequency arranging agitator is 25Hz, and after every banburying 40 minutes, stirring 1 time, stirring obtains cake mass 4 times altogether.Treat that pug is cooled to room temperature, be crushed to, with pulverizer, the material that mean diameter is 8mm.
At 180 DEG C, described material is added heat fusing in injecting machine material tube, under the pressure of 125Bar, melted material is injected in die cavity, fill die cavity；After mould filling, the heat in material is conducted by mould, opens mould, takes out cured base substrate, is described FERRITE CORE base substrate.
FERRITE CORE base substrate sequentially passes through solvent degreasing, thermal debinding and sintering and obtains described FERRITE CORE；
Described solvent degreasing includes bubble oil successively, dries and dry, and described bubble oil is using kerosene as solvent, and solution temperature is 55 DEG C, and the time is 10 hours, to remove portion of binder；
Described thermal debinding carries out being warming up under 450 DEG C of conditions with the programming rate of 0.5 DEG C/min, to remove more binding agent.
Described sintering includes:
Temperature rise period: slowly heat up, make temperature be slowly raised to 450 DEG C from room temperature with 0.5 DEG C/min of heating rate, after to be bonded dose of discharge, with 1.5 DEG C/min of heating rate, be continuously heating to 900 DEG C；
Blank gradually tapers up the stage: be continuously heating to 1020 DEG C with 1 DEG C/min of heating rate；
Holding stage: be incubated 2h at described 1020 DEG C；
Temperature-fall period: after magnetic core is burned, lower the temperature, cooldown rate is 1.5 DEG C/min.
Embodiment 2
The pellet of injection moulding, is made up of the component of following percentage by weight:
Ferrite powder 80%
Binding agent 20%
Described ferrite powder is made up of the component of following percentage by weight:
Described binding agent is made up of the component of following percentage by weight:
Putting into banburying in banbury, design temperature 180 DEG C according to the mixing of above percentage by weight, the frequency arranging agitator is 25Hz, and after every banburying 40 minutes, stirring 1 time, stirring obtains cake mass 4 times altogether.Treat that pug is cooled to room temperature, be crushed to, with pulverizer, the material that mean diameter is 8mm.
At 180 DEG C, described material is added heat fusing in injecting machine material tube, under the pressure of 125Bar, melted material is injected in die cavity, fill die cavity；After mould filling, the heat in material is conducted by mould, opens mould, takes out cured base substrate, is described FERRITE CORE base substrate.
FERRITE CORE base substrate sequentially passes through solvent degreasing, thermal debinding and sintering and obtains described FERRITE CORE；
Described solvent degreasing includes bubble oil successively, dries and dry, and described bubble oil is using kerosene as solvent, and solution temperature is 55 DEG C, and the time is 10 hours, to remove portion of binder；
Described thermal debinding carries out being warming up under 450 DEG C of conditions with the programming rate of 0.5 DEG C/min, to remove more binding agent.
Described sintering includes:
Temperature rise period: slowly heat up, make temperature be slowly raised to 450 DEG C from room temperature with 0.5 DEG C/min of heating rate, after to be bonded dose of discharge, with 1.5 DEG C/min of heating rate, be continuously heating to 900 DEG C；
Blank gradually tapers up the stage: be continuously heating to 1050 DEG C with 1 DEG C/min of heating rate；
Holding stage: be incubated 2h at described 1050 DEG C；
Temperature-fall period: after magnetic core is burned, lower the temperature, cooldown rate is 1.5 DEG C/min.
Embodiment 3
The pellet of injection moulding, is made up of the component of following percentage by weight:
Ferrite powder 90%
Binding agent 10%
Described ferrite powder is made up of the component of following percentage by weight:
Described binding agent is made up of the component of following percentage by weight:
Putting into banburying in banbury, design temperature 180 DEG C according to the mixing of above percentage by weight, the frequency arranging agitator is 25Hz, and after every banburying 40 minutes, stirring 1 time, stirring obtains cake mass 4 times altogether.Treat that pug is cooled to room temperature, be crushed to, with pulverizer, the material that mean diameter is 8mm.
At 180 DEG C, described material is added heat fusing in injecting machine material tube, under the pressure of 125Bar, melted material is injected in die cavity, fill die cavity；After mould filling, the heat in material is conducted by mould, opens mould, takes out cured base substrate, is described FERRITE CORE base substrate.
FERRITE CORE base substrate, sequentially passes through solvent degreasing, thermal debinding and sintering and obtains described FERRITE CORE；
Described solvent degreasing includes bubble oil successively, dries and dry, and described bubble oil is using kerosene as solvent, and solution temperature is 55 DEG C, and the time is 10 hours, to remove portion of binder；
Described thermal debinding carries out being warming up under 450 DEG C of conditions with the programming rate of 0.5 DEG C/min, to remove more binding agent.
Described sintering includes:
Temperature rise period: slowly heat up, make temperature be slowly raised to 450 DEG C from room temperature with 0.5 DEG C/min of heating rate, after to be bonded dose of discharge, with 1.5 DEG C/min of heating rate, be continuously heating to 900 DEG C；
Blank gradually tapers up the stage: be continuously heating to 1050 DEG C with 1 DEG C/min of heating rate；
Holding stage: be incubated 2h at described 1050 DEG C；
Temperature-fall period: after magnetic core is burned, lower the temperature, cooldown rate is 1.5 DEG C/min.
The 3D FERRITE CORE that above three embodiment is produced carries out performance test, and the 3D FERRITE CORE produced with traditional dry-pressing formed method contrasts, as shown in the table:
Injection moulding 3D magnetic core is carried out Micro-Structure Analysis, as shown in Fig. 3 (a) and Fig. 3 (b), Fig. 3 (a) is magnetic core surface microstructure, Fig. 3 (b) is magnetic core section microstructure, it can be seen that the crystal grain of injection moulding 3D magnetic core is fine and close, tiny and homogeneous from figure.
From embodiment 1-3 testing result, the magnetic core mechanical property and the thermal shock performance that produce with the pellet of 3D FERRITE CORE injection moulding of the present invention are all good than the magnetic core that traditional dry compression methodology is produced, and its magnetic core density is also greater than the magnetic core density that traditional dry compression methodology is produced.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, it is impossible to assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, make some equivalent replacements or obvious modification, and performance or purposes are identical, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. the injection molding forming method of a 3D FERRITE CORE, it is characterised in that comprise the steps:
(1) ferrite powder that percentage by weight is 70%～95% is carried out with the binding agent that percentage by weight is 5%～30% mixing become pug, broken after cooling obtain material；Wherein, described ferrite powder includes the component of following percentage by weight: the ferrum oxide of 60%～70%, the nickel oxide of 8%～14%, the copper oxide of 2%～10%, the zinc oxide of 15%～25%, the manganese oxide of 0.05%～1%, the bismuth oxide of 0.05%～1%, the silicon dioxide of 0.05%～1%, the calcium oxide of 0.05%～1%, the diboron trioxide of 0.05%～1%；Described binding agent includes the component of following percentage by weight: paraffin 40%～80%, polyethylene 5%～25%, polypropylene 5%～25%, dioctyl phthalate 1%～3%, dibutyl phthalate 1%～3% and oleic acid 2%～8%；
(2) described heating material is melted, melted material is injected in die cavity, fill die cavity；
(3) described material is made to be solidified into FERRITE CORE base substrate in die cavity.
2. the manufacture method of FERRITE CORE as claimed in claim 1, it is characterised in that in step (1), the pug of mixing one-tenth is broken into the material of Ф 3～8mm.
3. the manufacture method of FERRITE CORE as claimed in claim 1, it is characterised in that in step (2), at 120～220 DEG C, described material is added heat fusing in injecting machine material tube, under the pressure of 50～150Bar, melted material is injected in die cavity, fill die cavity.
4. the material for molding 3D FERRITE CORE, it is characterised in that include ferrite powder that percentage by weight is 70%～95% and percentage by weight is the binding agent of 5%～30%；Wherein, described ferrite powder includes the component of following percentage by weight: the ferrum oxide of 60%～70%, the nickel oxide of 8%～14%, the copper oxide of 2%～10%, the zinc oxide of 15%～25%, the manganese oxide of 0.05%～1%, the bismuth oxide of 0.05%～1%, the silicon dioxide of 0.05%～1%, the calcium oxide of 0.05%～1%, the diboron trioxide of 0.05%～1%；Described binding agent includes the component of following percentage by weight: paraffin 40%～80%, polyethylene 5%～25%, polypropylene 5%～25%, dioctyl phthalate 1%～3%, dibutyl phthalate 1%～3% and oleic acid 2%～8%.
5. the manufacture method of a 3D FERRITE CORE, it is characterised in that include the FERRITE CORE base substrate that will prepare through the injection molding forming method described in any one of claims 1 to 3, obtain described FERRITE CORE through defat and sintering.
6. the manufacture method of FERRITE CORE as claimed in claim 5, it is characterised in that described defat includes the solvent degreasing and the thermal debinding that are sequentially carried out.
7. the manufacture method of FERRITE CORE as claimed in claim 6, it is characterised in that described solvent degreasing includes bubble oil successively, dries and dry, described bubble oil is using kerosene as solvent, and solution temperature is 30～90 DEG C, and the time is 5～20 hours.
8. the manufacture method of the FERRITE CORE as described in any one of claim 6 to 7, it is characterised in that described thermal debinding carries out being warming up under 150～450 DEG C of conditions with the programming rate of 0.3～1.0 DEG C/min.
9. the manufacture method of the FERRITE CORE as described in any one of claim 5 to 8, it is characterised in that described sintering includes:
Temperature rise period: make temperature be slowly raised to 400～500 DEG C from room temperature with 0.3～1.0 DEG C/min of heating rate, 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: be continuously heating to 1000～1100 DEG C with 0.5～1.5 DEG C/min of heating rate；
Holding stage: be incubated 0.5～2.5h at described 1000～1100 DEG C；
Temperature-fall period: after magnetic core is burned, lower the temperature, cooldown rate is 0.5～2.0 DEG C/min.
10. the manufacture method of the FERRITE CORE as described in any one of claim 6 to 9, it is characterised in that described solvent degreasing, thermal debinding and sintering all carry out in natural air.
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