CN106992345A - Cavity body filter - Google Patents
Cavity body filter Download PDFInfo
- Publication number
- CN106992345A CN106992345A CN201710425012.2A CN201710425012A CN106992345A CN 106992345 A CN106992345 A CN 106992345A CN 201710425012 A CN201710425012 A CN 201710425012A CN 106992345 A CN106992345 A CN 106992345A
- Authority
- CN
- China
- Prior art keywords
- cavity
- cover plate
- body filter
- powder
- cavity body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—Hollow waveguide filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
- H01P11/007—Manufacturing frequency-selective devices
Abstract
The invention provides a kind of cavity body filter, including cavity, cover plate and resonant rod, the cavity combines to form the resonator of closing with the cover plate, and the resonant rod is assemblied in cavity, and the cavity and the cover plate are made using metal dust through injection molding technique production.The cavity and lid of the cavity body filter of the present invention are made using metal dust raw material through injection molding technique, not only increase the mechanical performance and heat conductivility of cavity body filter, and substantially reduce the cost of material of wave filter, and are easily assembled, are manufactured.
Description
Technical field
The present invention relates to technical field of micro communication, a kind of cavity body filter is specifically related to.
Background technology
In the base station system of mobile communication, the carrying communication number in particular frequency range is generally launched by transmitting antenna
According to signal of communication, and signal of communication is received by reception antenna.Above-mentioned spy is not only included in the signal received by reception antenna
Determine the signal of communication of the carrying communication data in frequency range, but also including the clutter outside many above-mentioned particular frequency ranges or
Interference signal.The carrying communication number in the particular frequency range of transmitting antenna transmitting is obtained in the signal to be received from reception antenna
According to signal of communication, it usually needs the signal for receiving the reception antenna is filtered by wave filter, by the carrying communicate number
According to signal of communication specific frequency outside clutter or interference signal filter out.
At present, cavity body filter is generally used in base station system.And the cavity body filter generally uses aluminium, copper or aluminium alloy
Make.Because the density of aluminium, copper or aluminium alloy is larger, the weight for the cavity body filter being made from it is also larger, and then makes cavity
Wave filter is unfavorable for transporting, install and dismantling, while also being had higher requirements to the support for installing the cavity body filter.
Cavity body filter cavity and cover plate are typically now prepared using traditional extrusion process, due to the defect of technique itself,
Be frequently present of the defects such as stomata, shrinkage cavity, slag inclusion, segregation in product, and due to the effect of high temperature, coarse grains, mechanical performance compared with
Difference.
The content of the invention
In view of this, the cavity body filter that provides of the present invention, preferably overcome the problem of above-mentioned prior art is present and
Defect, with higher mechanical performance, electric property and heat conductivility, compared with traditional aluminium alloy cavity body filter, drops significantly
Low cavity body filter production cost, and it is easy to installation, dismounting, transport of cavity body filter etc..
A kind of cavity body filter, including cavity, cover plate and resonant rod, the cavity combine to form closing with the cover plate
Resonator, the resonant rod is assemblied in cavity, and the cavity and the cover plate use metal dust through injection molding technique
Production is made, and specifically includes following steps：
Step 1: providing metal dust raw material：Magnesium powder, samarium powder, zirconium powder, silver and/or zinc powder, and according to each component weight hundred
Divide ratio：Magnesium 95.4~98%, samarium 1.5~3.5%, zirconium 0.2~1.0%, silver and/or zinc 0.01~0.1%, calculating weighs described
Metal dust raw material；
Step 2: being by weight percentages of components：50~55% paraffin, 40~45% high density polyethylene (HDPE)s and 5% are stearic
Acid mixing banburying, cooling obtains mixing adhesive；
Step 3: being 3 by Volume fraction:2 metal dust raw material and mixing adhesive is first added in kneader and carried out
Mixing, obtained feeding obtains graininess feeding by extrusion and granulation again；
Step 4: the particle feeding is imported into injector barrel, using three sections of heating, first paragraph temperature is 155~160
DEG C DEG C, second segment be 150~155 DEG C, the 3rd section be 145~150 DEG C, obtain injection molding cavity or cover plate；
Step 5: injection molding cavity or cover plate are carried out into solvent degreasing, thermal debinding and sintering successively.
Further, in the step 2, the temperature of the banburying is 160~180 DEG C, time of the banburying for 2~
3h。
Further, in the step 3, the temperature of the mixing is 150~170 DEG C, time of the mixing for 3~
5h。
Further, in the step 3, the extrusion is specifically included：Using single screw extrusion machine, design temperature 150~
170 DEG C, 300~500r/min of rotating speed, the feeding after the mixing is poured into its barrel, extruded, and extrudes coefficient 2~4
It is secondary.
Further, in the step 4, the injection molding injection pressure is set to 45~55MPa, dwell time
For 3~5s, mold temperature is 40~50 DEG C.
Further, in the step 5, the solvent degreasing is specifically included：Injection molding cavity or cover plate are immersed
In 50~60 DEG C of normal heptane, 18~24h of degreasing；The thermal debinding is specifically included：By the cavity or lid after the solvent degreasing
Plate is put into program control stove, in N2And SF6Heated under the protection of mixed gas；The heating is specifically included：When being heated to 30 DEG C by
1 DEG C/min is warming up to 140 DEG C, is incubated 30min, is then warming up to 250 DEG C by 0.5 DEG C/min, is incubated 120min, continues to press 0.5
DEG C/min is warming up to 420 DEG C, is incubated 120min.
Further, in the step 5, the sintering is specifically included：By the cavity or cover plate after the thermal debinding in N2
And SF6Under the protection of mixed gas, 1~1.5h of pre-sintering at 450 DEG C is again heated to 480 DEG C, is incubated 1h, is finally cooled to
Room temperature.
Further, after the step 5, the cavity or the cover plate carry out 4~10h's at 500~540 DEG C
After solution treatment, then at 175~250 DEG C carry out 4~50h Ageing Treatment.
Further, the surface of the cavity side relative with the cover plate is coated with metal level.
Further, the metal level is the argent that thickness is 0.8~1.2mm.
Compared with prior art, the beneficial effect for the cavity body filter that the present invention is provided is：
The cavity and lid of the cavity body filter of the present invention are made using metal dust raw material through injection molding technique, together
When metal dust raw material be mainly made up of magnesium, in addition to a small amount of samarium, zirconium, silver or zinc not only increase the machine of cavity body filter
Tool performance and heat conductivility, and the cost of material of wave filter is substantially reduced, and be easily assembled, manufacture.By the metal dust
The cavity body filter that raw material is made, its quality is only the 2/3 of the cavity body filter being made up of aluminium alloy of same volume, its room temperature heat
Conductance reaches 130~140W/ (mK), 140~160MPa of yield strength, and tensile strength is 240~285MPa.
Embodiment
For the ease of understanding the present invention, technical scheme is elaborated with reference to the mode of embodiment,
Many details are elaborated in the following description to fully understand the present invention.
But the invention can be embodied in many other ways as described herein, those skilled in the art can be with
Similar improvement is done in the case of without prejudice to intension of the present invention, therefore the present invention is not limited to the specific embodiments disclosed below.
Unless otherwise defined, all technologies used herein and scientific terminology have and the common skill of art of the present invention
The identical implication that art personnel are generally understood that.When there is contradiction, the definition in this specification is defined.
Term as used herein：
" by ... prepare " it is synonymous with "comprising".Term "comprising" used herein, " comprising ", " having ", " containing "
Or its any other deformation, it is intended that cover including for non-exclusionism.For example, composition, step, method comprising listed elements,
Product or device are not necessarily limited to those key elements, but can include not expressly listed other key elements or such a composition, step
Suddenly, method, product or the intrinsic key element of device.
Conjunction " by ... constitute " exclude any key element do not pointed out, step or component.If be used in claim,
This phrase will make claim be closed, it is not included the material in addition to materials of those descriptions, but relative
Except customary impurities.When phrase " by ... constitute " be rather than immediately following theme in the clause that appears in claim main body after
When, it is only limited to the key element described in the clause；Other key elements be not excluded as the overall claim it
Outside.
Equivalent, concentration or other values or parameter are excellent with scope, preferred scope or a series of upper limit preferred values and lower limit
During the Range Representation that choosing value is limited, this, which is appreciated that, specifically discloses by any range limit or preferred value and any scope
All scopes that any pairing of lower limit or preferred value is formed, regardless of whether whether the scope separately discloses.For example, when open
Scope " when 1~5 ", described scope should be interpreted as including scope " 1~4 ", " 1~3 ", " 1~2 ", " 1~2 and 4~
5 ", " 1~3 and 5 " etc..When number range is described herein, unless otherwise indicated, otherwise the scope is intended to include its end
Value and all integers and fraction within the range.
"and/or" is used to represent that one of illustrated situation or both may to occur, for example, A and/or B includes (A
And B) and (A or B)；
In addition, the indefinite article " one kind " and " one " before key element of the present invention or component are to key element or the quantitative requirement of component
(i.e. occurrence number) unrestriction.Therefore " one " or " one kind " should be read as including one or at least one, and odd number
The key element or component of form also include plural form, unless the quantity substantially refers to singulative.
In addition, the statement of " at least one " herein includes all numbers of one and the above (for example, at least two, at least
4, at least six, at least eight, at least ten, at least 25, at least 50, at least 100 etc.).
The invention provides a kind of cavity body filter, including cavity, cover plate and resonant rod, the cavity and the cover plate knot
The resonator for forming closing is closed, the resonant rod is assemblied in cavity, the cavity and the cover plate are passed through using metal dust
Injection molding technique production is made, and specifically includes following steps：
Step 1: providing metal dust raw material：Magnesium powder, samarium powder, zirconium powder, silver and/or zinc powder, and according to each component weight hundred
Divide ratio：Magnesium powder 95.4~98%, such as 95.4%, 96%, 97%, 97.6% or 98%；Samarium powder 1.5~3.5%, such as 1.5%,
2%th, 2.5%, 3% or 3.5% etc.；Zirconium powder 0.2%~1.0%, such as 0.2%, 0.4%, 0.6%, 0.8% or 3.0%；Silver
Powder and/or zinc powder 0.01%~0.1%, such as 0.01%, 0.02%, 0.05%, 0.08% or 0.1%；Calculating weighs described
Metal dust raw material.
Step 2: being by weight percentages of components：50~55% such as 50%, 51%, 52%, 53%, 54% or 55% stones
Wax, 40~45% such as 40%, 41%, 42%, 43%, 44% or 45% high density polyethylene (HDPE) and 5% stearic acid mixing banburyings, it is cold
But obtain mixing adhesive.
Step 3: being 3 by Volume fraction：2 metal dust raw material and mixing adhesive is first added in kneader and carried out
Mixing, obtained feeding obtains graininess feeding by extrusion and granulation again.
Step 4: the particle feeding is imported into injector barrel, using three sections of heating, first paragraph temperature is 155~160
DEG C such as 155 DEG C, 156 DEG C, 157 DEG C, 158 DEG C, 159 DEG C or 160 DEG C, second segment be 150~155 DEG C as 150 DEG C, 151 DEG C, 152
DEG C, 153 DEG C, 154 DEG C or 155 DEG C, the 3rd section is 145~150 DEG C such as 145 DEG C, 146 DEG C, 147 DEG C, 148 DEG C, 149 DEG C or 150
DEG C, obtain molding cavity or cover plate.
Step 5: injection molding cavity or cover plate are carried out into solvent degreasing, thermal debinding and sintering successively.
Preferably, the average grain diameter of each metal dust (magnesium powder, samarium powder, zirconium powder, silver and/or zinc powder) is 5~10 μm.
Preferably, in the step 2, the temperature of the banburying for 160~180 DEG C as 160 DEG C, 165 DEG C, 170 DEG C, 175
DEG C or 180 DEG C etc., the time of banburying is 2~3h such as 2h, 2.2h, 2.5h, 2.8h or 3h etc..
Preferably, in the step 3, the temperature of the mixing for 160~180 DEG C as 160 DEG C, 165 DEG C, 170 DEG C, 175
DEG C or 180 DEG C etc., the time of the mixing is 3~5h such as 3h, 3.5h, 4h, 4.5h or 5h etc..
Preferably, in the step 3, the extrusion is specifically included：Using single screw extrusion machine, design temperature is 150~
170 DEG C such as 150 DEG C, 155 DEG C, 160 DEG C, 165 DEG C or 170 DEG C, rotating speed is 300~500r/min such as 300r/min, 350r/
Min, 400r/min, 450r/min or 500r/min etc.；Feeding after the mixing is poured into its barrel, extruded；Squeeze
It is 2~4 times, such as 2 times, 3 times or 4 times to go out coefficient.
Preferably, in the step 5, the injection molding injection pressure be set to 45~55MPa such as 45MPa,
50MPa or 55MPa etc.；Dwell time is 3~5s such as 3s, 4s or 5s；Mold temperature is 40~50 DEG C such as 40 DEG C, 45 DEG C or 50 DEG C
Deng.
Preferably, in the step 5, the solvent degreasing is specifically included：By injection molding cavity or cover plate immersion 50
In~60 DEG C such as 50 DEG C, 52 DEG C, 55 DEG C, 58 DEG C or 60 DEG C of normal heptane, 18~24h of degreasing such as 18h, 19h, 20h, 21h, 22h,
23h or 24h etc..
The thermal debinding is specifically included：Cavity or cover plate after the solvent degreasing is put into program control stove, in N2With
SF6Heated under the protection of mixed gas；The heating is specifically included：When being heated to 30 DEG C 140 DEG C, guarantor are warming up to by 1 DEG C/min
Warm 30min, is then warming up to 250 DEG C by 0.5 DEG C/min, is incubated 120min, continues to be warming up to 420 DEG C, insulation by 0.5 DEG C/min
120min。
Preferably, in the step 5, the sintering is specifically included：By the cavity or cover plate after the thermal debinding in N2With
SF6Under the protection of mixed gas, 1~1.5h of pre-sintering such as 1h, 1.1h, 1.2h, 1.3h, 1.4h or 1.5h etc. at 450 DEG C, then
480 DEG C are heated to, 1h is incubated, is finally cooled to room temperature.
It is to be appreciated that samarium (Sm) powder can play the effect of crystal grain thinning, solution strengthening and ageing strengthening.Zirconium (Zr)
Powder further plays a part of crystal grain thinning；The addition of zirconium simultaneously declines to the thermal conductivity of magnesium, influences smaller.Silver-colored (Ag) and zinc
(Zn) reaction of the magnesium to age-hardening can be improved, the mechanical performance of magnesium is further enhanced, while silver is under magnesium thermal conductivity
Drop influences also very little.
Preferably, after the step 5, the cavity or the cover plate 500~540 DEG C as 500 DEG C, 510 DEG C, 520
DEG C, carry out at 530 DEG C or 540 DEG C after 4~10h such as 4h, 5h, 6h, 7h, 8h, 9h or 10h solution treatment, then 175~250
DEG C as carried out 4~50h such as 4h, 10h, 15h, 20h, 30h, 40h at 175 DEG C, 185 DEG C, 200 DEG C, 210 DEG C, 230 DEG C or 250 DEG C
Or 50h Ageing Treatment.
Preferably, the surface of the cavity side relative with the cover plate is coated with metal level.
It is to be appreciated that solution treatment refers to is heated to the constant temperature holding of high temperature monophase field by alloy, make superfluous mutually fully molten
Solution rear quick cooling into solid solution, to obtain the Technology for Heating Processing of supersaturated solid solution.Solution treatment can make each in magnesium alloy
Mutually fully dissolving, Intensive intervention body are planted, and then improves cavity toughness and etch resistant properties, elimination stress and softening.Ageing Treatment refers to
Alloy workpiece is through solution treatment, cold plastic deformation or casting, after forging, is placed in higher temperature or room temperature keeps its performance,
Shape, the Technology for Heating Processing of size time to time change；Its purpose is to stablize the size of casting.The present invention is by being made cavity
Solution treatment and Ageing Treatment are carried out with cover plate, the heat conductivility and mechanical property of cavity body filter can be further lifted.
Preferably, the metal level is the gold that thickness is 0.8~1.2mm such as 0.8mm, 0.9mm, 1mm, 1.1mm or 1.2mm
Category silver.
For the ease of understanding the present invention, technical scheme is further illustrated with reference to embodiment.Applicant
Statement, the present invention illustrates detailed process equipment and the technological process of the present invention, but not office of the invention by above-described embodiment
It is limited to above-mentioned detailed process equipment and technological process, that is, does not mean that the present invention should rely on above-mentioned detailed process equipment and technique stream
Cheng Caineng is implemented.Person of ordinary skill in the field is it will be clearly understood that any improvement in the present invention, to each original of product of the present invention
The equivalence replacement of material and the addition of auxiliary element, the selection of concrete mode etc., all fall within protection scope of the present invention and open model
Within enclosing.
Embodiment 1
Specific implementation step is as follows：
Step 1: preparing metal powder stock：Using average grain diameter be 5~10 μm of magnesium powders, samarium powder, zirconium powder, silver powder as original
Material, and according to each component percentage by weight：Magnesium 95.4%, samarium 3.5%, zirconium 1.0%, silver 0.1%, calculating weigh each metal dust
Raw material is simultaneously mixed.
Step 2: preparing adhesive：Using banbury, 180 DEG C of mixing temperature is set, is by percentage by weight：50% stone
The high molecular component of wax (PW), 45% high density polyethylene (HDPE) (HDPE) and 5% stearic acid (SA) is sequentially added according to fusing point height
Mixing adhesive is made in blender, banburying 2 hours, cooling.
Step 3: using kneader, setting kneading temperature as 160 DEG C, being 3 by Volume fraction：2 metal dust mixing
Raw material and mixing adhesive are sequentially added in the barrel of kneader, are kneaded 3 hours, are obtained the feeding being evenly distributed.
Step 4: extrusion：Using single screw extrusion machine, design temperature is 170 DEG C, and rotating speed is 500r/min, and feeding is led
In feeding cylinder, extruded, extrusion coefficient 2 times obtains strip feeding.
Step 5: granulation：Using granulator, the strip feeding of extrusion is broken into graininess feeding, then pack sealing.
Step 6: graininess feeding is poured into injector barrel, using three sections of heating, first paragraph temperature is 155 DEG C, second
Section is 150 DEG C, and the 3rd section is 145 DEG C, and injection pressure is 50MPa, and the dwell time is 3 seconds, and mold temperature is 45 DEG C, is injected
The cover plate of shaping.
Step 7: solvent degreasing：In the normal heptane that injection molding cover plate is put into 50 DEG C, degreasing 24 hours, i.e. paraffin
During removing more than 80%, cavity or cover plate are taken out.
Step 8: the cover plate after solvent degreasing is put into program control stove, in N2And SF6Under the protection of mixed gas
Heat, heating technique is specially：Be warming up to 140 DEG C by 1 DEG C/min when being heated to 30 DEG C, be incubated 30min, then by 0.5 DEG C/
Min is warming up to 250 DEG C, is incubated 120min, continues to be warming up to 420 DEG C by 0.5 DEG C/min, is incubated 120min.
Step 9: by the cover plate after thermal debinding in N2And SF6It is small in 450 DEG C of pre-sinterings 1 under the protection of mixed gas
When, remove Residual adhesive.480 DEG C are again heated to, 1h is incubated, finally cools to room temperature with the furnace.
Step 10: by the cover plate after oversintering at a temperature of 510 DEG C, after the solution treatment for carrying out insulation 4 hours, then
At a temperature of 250 DEG C, the Ageing Treatment of insulation 4 hours is carried out.
Embodiment 2
Specific implementation step is as follows：
Step 1: preparing metal powder stock：It is 5~10 μm of magnesium powders, samarium powder, zirconium powder, silver and/or zinc with average grain diameter
Powder is raw material, and according to each component percentage by weight：Magnesium 96.7%, samarium 3%, zirconium 0.2%, zinc 0.08%, calculating weigh each gold
Category powder stock is simultaneously mixed.
Step 2: preparing adhesive：Using banbury, 175 DEG C of mixing temperature is set, is by percentage by weight：52% stone
The high molecular component of wax (PW), 43% high density polyethylene (HDPE) (HDPE) and 5% stearic acid (SA) is sequentially added according to fusing point height
Mixing adhesive is made in blender, banburying 2.2 hours, cooling.
Step 3: using kneader, setting kneading temperature as 165 DEG C, being 3 by Volume fraction：2 metal dust mixing
Raw material and mixing adhesive are sequentially added in the barrel of kneader, are kneaded 3.5 hours, are obtained the feeding being evenly distributed.
Step 4: extrusion：Using single screw extrusion machine, design temperature is 165 DEG C, and rotating speed is 450r/min, and feeding is led
In feeding cylinder, extruded, extrusion coefficient 3 times obtains strip feeding.
Step 5: granulation：Using granulator, the strip feeding of extrusion is broken into graininess feeding, then pack sealing.
Step 6: graininess feeding is poured into injector barrel, using three sections of heating, first paragraph temperature is 156 DEG C, second
Section is 155 DEG C, and the 3rd section is 146 DEG C, and injection pressure is 45MPa, and the dwell time is 4 seconds, and mold temperature is 40 DEG C, is injected
The cover plate of shaping.
Step 7: solvent degreasing：In the normal heptane that injection molding cover plate is put into 52 DEG C, degreasing 23 hours, i.e. paraffin
During removing more than 80%, cavity or cover plate are taken out.
Step 8: the cover plate after solvent degreasing is put into program control stove, in N2And SF6Under the protection of mixed gas
Heat, heating technique is specially：Be warming up to 140 DEG C by 1 DEG C/min when being heated to 30 DEG C, be incubated 30min, then by 0.5 DEG C/
Min is warming up to 250 DEG C, is incubated 120min, continues to be warming up to 420 DEG C by 0.5 DEG C/min, is incubated 120min.
Step 9: by the cover plate after thermal debinding in N2And SF6Under the protection of mixed gas, in 450 DEG C of pre-sinterings 1.2
Hour, remove Residual adhesive.480 DEG C are again heated to, 1h is incubated, finally cools to room temperature with the furnace.
Step 10: by the cover plate after oversintering at a temperature of 530 DEG C, after the solution treatment for carrying out insulation 8 hours, then
At a temperature of 200 DEG C, the Ageing Treatment of insulation 40 hours is carried out.
Embodiment 3
Specific implementation step is as follows：
Step 1: preparing metal powder stock：It is 5~10 μm of magnesium powders, samarium powder, zirconium powder, silver and/or zinc with average grain diameter
Powder is raw material, and according to each component percentage by weight：Magnesium 97%, samarium 2.5%, zirconium 0.4%, silver 0.05%, zinc 0.05%, are calculated
Weigh each metal dust raw material and mix.
Step 2: preparing adhesive：Using banbury, 170 DEG C of mixing temperature is set, is by percentage by weight：53% stone
The high molecular component of wax (PW), 42% high density polyethylene (HDPE) (HDPE) and 5% stearic acid (SA) is sequentially added according to fusing point height
Mixing adhesive is made in blender, banburying 2.5 hours, cooling.
Step 3: using kneader, setting kneading temperature as 170 DEG C, being 3 by Volume fraction：2 metal dust mixing
Raw material and mixing adhesive are sequentially added in the barrel of kneader, are kneaded 4 hours, are obtained the feeding being evenly distributed.
Step 4: extrusion：Using single screw extrusion machine, design temperature is 160 DEG C, and rotating speed is 300r/min, and feeding is led
In feeding cylinder, extruded, extrusion coefficient 3 times obtains strip feeding.
Step 5: granulation：Using granulator, the strip feeding of extrusion is broken into graininess feeding, then pack sealing.
Step 6: graininess feeding is poured into injector barrel, using three sections of heating, first paragraph temperature is 155 DEG C, second
Section is 150 DEG C, and the 3rd section is 145 DEG C, and injection pressure is 55MPa, and the dwell time is 5 seconds, and mold temperature is 50 DEG C, is injected
The cover plate of shaping.
Step 7: solvent degreasing：In the normal heptane that injection molding cover plate is put into 55 DEG C, degreasing 20 hours, i.e. paraffin
During removing more than 80%, cavity or cover plate are taken out.
Step 8: the cover plate after solvent degreasing is put into program control stove, in N2And SF6Under the protection of mixed gas
Heat, heating technique is specially：Be warming up to 140 DEG C by 1 DEG C/min when being heated to 30 DEG C, be incubated 30min, then by 0.5 DEG C/
Min is warming up to 250 DEG C, is incubated 120min, continues to be warming up to 420 DEG C by 0.5 DEG C/min, is incubated 120min.
Step 9: by the cover plate after thermal debinding in N2And SF6Under the protection of mixed gas, in 450 DEG C of pre-sinterings 1.3
Hour, remove Residual adhesive.480 DEG C are again heated to, 1h is incubated, finally cools to room temperature with the furnace.
Step 10: by the cover plate after oversintering at a temperature of 520 DEG C, after the solution treatment for carrying out insulation 6 hours, then
At a temperature of 220 DEG C, the Ageing Treatment of insulation 30 hours is carried out.
Embodiment 4
Specific implementation step is as follows：
Step 1: preparing metal powder stock：It is 5~10 μm of magnesium powders, samarium powder, zirconium powder, silver and/or zinc with average grain diameter
Powder is raw material, and according to each component percentage by weight：Magnesium 97.3%, samarium 2%, zirconium 0.6%, silver 0.02%, zinc 0.08%, are calculated
Weigh each metal dust raw material and mix.
Step 2: preparing adhesive：Using banbury, 180 DEG C of mixing temperature is set, is by percentage by weight：55% stone
The high molecular component of wax (PW), 40% high density polyethylene (HDPE) (HDPE) and 5% stearic acid (SA) is sequentially added according to fusing point height
Mixing adhesive is made in blender, banburying 3 hours, cooling.
Step 3: using kneader, setting kneading temperature as 175 DEG C, being 3 by Volume fraction：2 metal dust mixing
Raw material and mixing adhesive are sequentially added in the barrel of kneader, are kneaded 4.5 hours, are obtained the feeding being evenly distributed.
Step 4: extrusion：Using single screw extrusion machine, design temperature is 155 DEG C, and rotating speed is 350r/min, and feeding is led
In feeding cylinder, extruded, extrusion coefficient 2 times obtains strip feeding.
Step 5: granulation：Using granulator, the strip feeding of extrusion is broken into graininess feeding, then pack sealing.
Step 6: graininess feeding is poured into injector barrel, using three sections of heating, first paragraph temperature is 160 DEG C, second
Section is 155 DEG C, and the 3rd section is 150 DEG C, and injection pressure is 50MPa, and the dwell time is 5 seconds, and mold temperature is 50 DEG C, is injected
The cover plate of shaping.
Step 7: solvent degreasing：In the normal heptane that injection molding cover plate is put into 60 DEG C, degreasing 18 hours, i.e. paraffin
During removing more than 80%, cavity or cover plate are taken out.
Step 8: the cover plate after solvent degreasing is put into program control stove, in N2And SF6Under the protection of mixed gas
Heat, heating technique is specially：Be warming up to 140 DEG C by 1 DEG C/min when being heated to 30 DEG C, be incubated 30min, then by 0.5 DEG C/
Min is warming up to 250 DEG C, is incubated 120min, continues to be warming up to 420 DEG C by 0.5 DEG C/min, is incubated 120min.
Step 9: by the cover plate after thermal debinding in N2And SF6Under the protection of mixed gas, in 450 DEG C of pre-sinterings 1.5
Hour, remove Residual adhesive；480 DEG C are again heated to, 1h is incubated, finally cools to room temperature with the furnace.
Step 10: by the cover plate after oversintering at a temperature of 510 DEG C, after the solution treatment for carrying out insulation 4 hours, then
At a temperature of 250 DEG C, the Ageing Treatment of insulation 4 hours is carried out.
Embodiment 5
Specific implementation step is as follows：
Step 1: preparing metal powder stock：It is 5~10 μm of magnesium powders, samarium powder, zirconium powder, silver and/or zinc with average grain diameter
Powder is raw material, and according to each component percentage by weight：Magnesium 97.6%, samarium 1.5%, zirconium 1.0%, silver 0.1%, calculating weigh each gold
Category powder stock is simultaneously mixed.
Step 2: preparing adhesive：Using banbury, 160 DEG C of mixing temperature is set, is by percentage by weight：50% stone
The high molecular component of wax (PW), 45% high density polyethylene (HDPE) (HDPE) and 5% stearic acid (SA) is sequentially added according to fusing point height
Mixing adhesive is made in blender, banburying 2 hours, cooling.
Step 3: using kneader, setting kneading temperature as 180 DEG C, being 3 by Volume fraction：2 metal dust mixing
Raw material and mixing adhesive are sequentially added in the barrel of kneader, are kneaded 5 hours, are obtained the feeding being evenly distributed.
Step 4: extrusion：Using single screw extrusion machine, design temperature is 170 DEG C, and rotating speed is 300r/min, and feeding is led
In feeding cylinder, extruded, extrusion coefficient 3 times obtains strip feeding.
Step 5: granulation：Using granulator, the strip feeding of extrusion is broken into graininess feeding, then pack sealing.
Step 6: graininess feeding is poured into injector barrel, using three sections of heating, first paragraph temperature is 155 DEG C, second
Section is 150 DEG C, and the 3rd section is 145 DEG C, and injection pressure is 50MPa, and the dwell time is 3 seconds, and mold temperature is 45 DEG C, is injected
The cover plate of shaping.
Step 7: solvent degreasing：In the normal heptane that injection molding cover plate is put into 50 DEG C, degreasing 18 hours, i.e. paraffin
During removing more than 80%, cavity or cover plate are taken out.
Step 8: the cover plate after solvent degreasing is put into program control stove, in N2And SF6Under the protection of mixed gas
Heat, heating technique is specially：Be warming up to 140 DEG C by 1 DEG C/min when being heated to 30 DEG C, be incubated 30min, then by 0.5 DEG C/
Min is warming up to 250 DEG C, is incubated 120min, continues to be warming up to 420 DEG C by 0.5 DEG C/min, is incubated 120min.
Step 9: by the cover plate after thermal debinding in N2And SF6It is small in 450 DEG C of pre-sinterings 1 under the protection of mixed gas
When, remove Residual adhesive.480 DEG C are again heated to, 1h is incubated, finally cools to room temperature with the furnace.
Step 10: by the cavity after oversintering at a temperature of 510 DEG C, after the solution treatment for carrying out insulation 5 hours, then
At a temperature of 230 DEG C, the Ageing Treatment of insulation 10 hours is carried out.
Comparative example 1
A kind of siliceous, iron aluminium alloy ENAC-44300 die casting cover plates.
Comparative example 2
A kind of magnesium alloy AE42 die casting cover plates containing aluminium, silicon.
Comparative example 3
A kind of magnesium alloy QE22 die casting cover plates of argentiferous, rare earth.
The comparing result such as following table of the mechanical performance and thermal conductivity factor of the embodiment 1~5 of same volume and the cover plate of comparative example：
As can be seen from the above table, the room temperature thermal conductivity of cover plate of the embodiment of the present invention reaches 130~140W/ (mK), surrender
Intensity reaches 140~160MPa, and tensile strength is 240~285MPa, the mechanical performance of the cover plate of comparative example 1 and comparative example 2 and
Heat conductivility is significantly worse than the mechanical property and heat conductivility of the embodiment of the present invention, and the tensile strength of comparative example 3 and heat conductivility
It is significantly worse than the tensile strength and heat conductivility of the embodiment of the present invention.
To sum up, the metal dust mixed material that the present invention is made up of magnesium powder, samarium powder, zirconium powder, silver and/or zinc powder is by injecting
The cover plate for the wave filter that moulding process is made and the mechanical performance of cavity and heat conductivility are better than being made up of aluminium alloy for same volume
Filter cover board and cavity.
Applicant states that the present invention illustrates detailed process equipment and the technological process of the present invention by above-described embodiment,
But the invention is not limited in above-mentioned detailed process equipment and technological process, that is, do not mean that the present invention has to rely on above-mentioned detailed
Process equipment and technological process could be implemented.Person of ordinary skill in the field it will be clearly understood that any improvement in the present invention,
Addition, selection of concrete mode of equivalence replacement and auxiliary element to each raw material of product of the present invention etc., all fall within the present invention's
Within the scope of protection domain and disclosure.
Claims (10)
1. a kind of cavity body filter, including cavity, cover plate and resonant rod, the cavity combine to form the humorous of closing with the cover plate
Shaken chamber, and the resonant rod is assemblied in cavity, it is characterised in that：The cavity and the cover plate are using metal dust through injection
Moulding process production is made, and specifically includes following steps：
Step 1: providing metal dust raw material：Magnesium powder, samarium powder, zirconium powder, silver and/or zinc powder, and according to each component weight percent
Than：Magnesium powder 95.4~98%, samarium powder 1.5~3.5%, zirconium powder 0.2~1.0%, silver powder and/or zinc powder 0.01~0.1%, are calculated
Weigh the metal dust raw material；
Step 2: being by weight percentages of components：50~55% paraffin, 40~45% high density polyethylene (HDPE)s and 5% stearic acid are mixed
Banburying is closed, cooling obtains mixing adhesive；
Step 3: being 3 by volume ratio：2 metal dust raw material and mixing adhesive is first added in kneader and kneaded, and is obtained
Feeding again by extrusion and granulation obtain graininess feeding；
Step 4: the particle feeding is imported into injector barrel, using three sections of heating, first paragraph temperature is 155~160 DEG C
DEG C, second segment is 150~155 DEG C, and the 3rd section is 145~150 DEG C, obtains injection molding cavity or cover plate；
Step 5: injection molding cavity or cover plate are carried out into solvent degreasing, thermal debinding and sintering successively.
2. cavity body filter according to claim 1, it is characterised in that：In the step 2, the temperature of the banburying is
160~180 DEG C, the time of the banburying is 2~3h.
3. cavity body filter according to claim 1, it is characterised in that：In the step 3, the temperature of the mixing is
150~170 DEG C, the time of the mixing is 3~5h.
4. cavity body filter according to claim 1, it is characterised in that：In the step 3, the extrusion is specifically included：
Using single screw extrusion machine, 150~170 DEG C of design temperature, 300~500r/min of rotating speed pour into the feeding after the mixing
In its barrel, extruded, extrusion coefficient 2~4 times.
5. cavity body filter according to claim 1, it is characterised in that：In the step 4, the injection molding note
Injection pressure is set to 45~55MPa, and the dwell time is 3~5s, and mold temperature is 40~50 DEG C.
6. cavity body filter according to claim 1, it is characterised in that：In the step 5, the solvent degreasing is specific
Including：Injection molding cavity or cover plate are immersed in 50~60 DEG C of normal heptane, 18~24h of degreasing；The thermal debinding is specific
Including：Cavity or cover plate after the solvent degreasing is put into program control stove, in N2And SF6Heated under the protection of mixed gas；
The heating is specifically included：140 DEG C are warming up to by 1 DEG C/min when being heated to 30 DEG C, 30min is incubated, then by 0.5 DEG C/min liters
Temperature is incubated 120min to 250 DEG C, continues to be warming up to 420 DEG C by 0.5 DEG C/min, is incubated 120min.
7. cavity body filter according to claim 1, it is characterised in that：In the step 5, the sintering is specifically included：
By the cavity or cover plate after the thermal debinding in N2And SF6Under the protection of mixed gas, 1~1.5h of pre-sintering at 450 DEG C, then
480 DEG C are heated to, 1h is incubated, is finally cooled to room temperature.
8. cavity body filter according to claim 1, it is characterised in that：After the step 5, the cavity or described
Cover plate is carried out at 500~540 DEG C after 4~10h solution treatment, then at 175~250 DEG C at 4~50h of progress timeliness
Reason.
9. cavity body filter according to claim 1, it is characterised in that：The cavity side relative with the cover plate
Surface is coated with metal level.
10. cavity body filter according to claim 9, it is characterised in that：The metal level is that thickness is 0.8~1.2mm
Argent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710425012.2A CN106992345B (en) | 2017-06-07 | 2017-06-07 | Cavity body filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710425012.2A CN106992345B (en) | 2017-06-07 | 2017-06-07 | Cavity body filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106992345A true CN106992345A (en) | 2017-07-28 |
| CN106992345B CN106992345B (en) | 2019-05-10 |
Family
ID=59421600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710425012.2A Active CN106992345B (en) | 2017-06-07 | 2017-06-07 | Cavity body filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106992345B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021017574A1 (en) * | 2019-07-26 | 2021-02-04 | 南京大学 | Infrared filter |
| WO2023142706A1 (en) * | 2022-01-29 | 2023-08-03 | 普罗斯通信技术（苏州）有限公司 | Metal injection-molded filter and manufacturing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101353768A (en) * | 2008-09-26 | 2009-01-28 | 北京科技大学 | Nitrogen-containing nickel-free stainless steel and metallurgy forming process for powder thereof |
| CN103650237A (en) * | 2013-08-09 | 2014-03-19 | 华为技术有限公司 | Filter tuning device and filter |
| CN105986157A (en) * | 2015-03-02 | 2016-10-05 | 中兴通讯股份有限公司 | Magnesium alloy and preparing method thereof |
-
2017
- 2017-06-07 CN CN201710425012.2A patent/CN106992345B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101353768A (en) * | 2008-09-26 | 2009-01-28 | 北京科技大学 | Nitrogen-containing nickel-free stainless steel and metallurgy forming process for powder thereof |
| CN103650237A (en) * | 2013-08-09 | 2014-03-19 | 华为技术有限公司 | Filter tuning device and filter |
| CN105986157A (en) * | 2015-03-02 | 2016-10-05 | 中兴通讯股份有限公司 | Magnesium alloy and preparing method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021017574A1 (en) * | 2019-07-26 | 2021-02-04 | 南京大学 | Infrared filter |
| WO2023142706A1 (en) * | 2022-01-29 | 2023-08-03 | 普罗斯通信技术（苏州）有限公司 | Metal injection-molded filter and manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106992345B (en) | 2019-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101214546B (en) | Powder metallurgical method for preparing titanium-aluminium alloy target material | |
| CN103725932B (en) | A kind of High-strength silicon, magnesium, manganese-aluminum bar and preparation method thereof | |
| CN107324801A (en) | A kind of ceramic injection forming material and preparation method thereof | |
| CN110343916A (en) | High thermal conductivity aluminium alloy suitable for rheo-diecasting and preparation method thereof and forming technology | |
| CN110396629A (en) | A kind of 800MPa grades of aluminum alloy extrusion section bar and preparation method thereof | |
| CN102367568A (en) | Preparation method of high-purity tantalum target material | |
| CN107447141A (en) | A kind of electronic product casing high-strength aluminum alloy and preparation method thereof | |
| CN100371483C (en) | Aluminum alloy for plastic working and manufacture thereof | |
| CN113846252A (en) | Preparation method of high-thermal-conductivity AlSi alloy | |
| CN106992345A (en) | Cavity body filter | |
| CN103468988A (en) | Preparation method of magnesium alloy | |
| CN109396440A (en) | A kind of forming method of ceramic particle reinforced aluminium base composite material | |
| US20040159984A1 (en) | Sintered Y2O3 and the manufacturing method for the same | |
| CN110904363A (en) | Preparation method of ABX alloy | |
| CN109084008A (en) | Magnesium alloy gear box casing and preparation method thereof | |
| CN106244848B (en) | The copper-based glass mold material of microalloying non-ferrous metal and its manufacturing method | |
| CN107201473A (en) | A kind of magnesium alloy and preparation method thereof, cavity body filter | |
| CN111690852B (en) | Die-casting alloy material for high-yield high-elongation mobile phone middle plate and preparation method thereof | |
| CN111378882B (en) | High-heat-conductivity die-casting magnesium alloy material and preparation method thereof | |
| CN115287486A (en) | Preparation method of mixed aluminum scrap solid regenerated wrought aluminum alloy | |
| CN105478780A (en) | Method for preparing engine cylinder head by powder metallurgy process | |
| CN100513626C (en) | Mullite whisker enhanced aluminum alloy composite material and its preparation method | |
| CN105777167B (en) | A kind of particular manufacturing craft of production of intelligent mobile phone screen | |
| CN111197134A (en) | Rare earth magnesium alloy material with high heat dissipation performance and preparation method thereof | |
| CN110172616A (en) | A kind of preparation method of Al-Ti-B refiner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |