CN106507732B - Cavity structure ceramic component filling forming method and particular manufacturing craft - Google Patents
Cavity structure ceramic component filling forming method and particular manufacturing craftInfo
- Publication number
- CN106507732B CN106507732B CN200710080516.1A CN200710080516A CN106507732B CN 106507732 B CN106507732 B CN 106507732B CN 200710080516 A CN200710080516 A CN 200710080516A CN 106507732 B CN106507732 B CN 106507732B
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Abstract
The present invention relates to a kind of cavity structure ceramic component filling forming method, is characterized in：Powder, binding agent, dispersant, diluent are mixed and made into the half-dried slurry of low liquid phase, vibration in mould are put into and are made shaping slurry；To being molded slurry curing, the demoulding, drying.The invention further relates to above-mentioned silicon nitride/silicon carbide ceramic component filling forming method particular manufacturing craft, including epimorph and core, it is characterized in that epimorph includes left half module, right half module and base plate, left half module, right half module merge to form closed die cavity, and be fixed on base plate, charging aperture is left in junction above left half module, the right half module, and base plate is provided with the pilot hole matched with rigid core bottom, and cover plate is connected with epimorph；Described core includes that rigid core and flexible core mold, rigid core are fixed on base plate, and flexible core mold is enclosed within rigid core.Due to controlling liquid content in slurry, and the design of flexible core mold, it is to avoid component is cracked in volume contraction.
Description
Technical field
The present invention relates generally to the little shape of the mouth as one speaks cavity structure silicon nitride/carbon of a kind of ceramic component filling forming method, more particularly to major lumen
SiClx ceramic component filling forming method.The invention further relates to the forming method particular manufacturing craft.
Background technology
Reaction sintering silicon nitride/carbide composite ceramic due to have the advantages that high temperature resistant, anti-oxidant and wear-resistant and anti-thermal shock,
So as in high temperature, at a high speed, there is in the working environment of strong corrosive medium special use value.Aluminium alloy is weaponry light weight
The critical material of change, is aerospace primary structural material, in aluminium alloy smelting, as silicon nitride/silicon carbide pottery is to which
Liquation is pollution-free, so the structure such as reaction sintering silicon nitride/silicon carbide ceramics crucible, thermocouple protective casing, heater protecting sleeve pipe
Part has huge application prospect in aluminium alloy smelting.Except the silicon nitride/silicon carbide composite ceramic component of said structure rule, go back
There is baroque component in a large number, such as all kinds of special-shaped crucibles, degassing rotor, impeller, heterotypic spray nozzle etc. are widely used in aluminium conjunction
Golden melting, production field.
For baroque product, most suitable using the method for injection forming for its feature.Traditional filling forming method is adopted
With gypsum mold, which has the advantages that low cost, various complex components easy to use, plastic, but, which has some cannot
The shortcoming for overcoming, such as：(1) fine particle during slip casting in slurry can in a large number to die surface in the presence of capillary force
Migration, cause uneven along component wall thickness direction different grain size distribution of particles, or even middle produce oarse-grained built on stilts phenomenon, make
Into major defect, product quality is affected；(2) component surface is coarse, it is impossible to meet the requirement of high-precision product, product is made
Produced with performance and greatly negatively affected；(3) as slurry liquid phase is high, during causing body drying, volume contraction is big, causes structure
Part poor dimensional precision.Typical members of the chamber size more than finish dimensional in one of which, such as vortex patern nozzle, as its presence is opened
The design feature of interior chamber size is smaller in size than at mouthful, and more there is some other in using traditional filling forming method cannot overcome
Shortcoming, such as：(1) as interior chamber size is bigger than oral area, after causing body formation, core cannot take out, and core can only be disposable
Use, preparation cost is greatly improved；(2) as slurry liquid phase is high, during causing body drying, volume contraction is big, and gypsum
Core is rigid die, does not shrink with base substrate, easily causes blank cracking, product rejection.Using traditional filling forming method
Prepare the typical structure ceramic product and cannot solve problem above, cause that preparation cost is high, percent defective is high, component surface is coarse,
Material property is unstable and scantling precision cannot ensure, therefore, traditional filling forming method can not prepare high accuracy, height
The little shape of the mouth as one speaks component of the major lumen of quality, it is impossible to meet high-level use requirement.
Content of the invention
In order to overcome the shortcomings of that prior art slurry liquid content is high and gypsum core is not shunk with base substrate, the present invention provides a kind of
Cavity structure ceramic component filling forming method.
The present invention provides this cavity structure ceramic component filling forming method particular manufacturing craft.
The technical solution adopted for the present invention to solve the technical problems is：A kind of cavity structure ceramic component filling forming method is special
Mould, including epimorph and core, it is characterised in that：Described epimorph includes left half module, right half module and base plate, left half module,
Right half module merges to form closed die cavity, and is fixed on base plate, and charging aperture is left in junction above left half module, the right half module,
Base plate is provided with the pilot hole matched with rigid core bottom, and cover plate is connected with epimorph；Described core includes rigid core
And flexible core mold, in the pilot hole that rigid core is fixed on base plate, flexible core mold is enclosed within rigid core.
One kind carries out cavity structure ceramic component filling forming method using above-mentioned particular manufacturing craft, is characterized in comprising the following steps：
A powder, binding agent, dispersant, diluent are uniformly mixed by (), wherein, powder is 24～35 by mass percent
The silica flour of %, mass percent are 65～76% silicon-carbide particle composition, and binder content is the 10～16% of powder quality,
Dispersant for powder quality 0.5～3%, amount of diluent is the 0.5～3.5% of powder quality, makes liquid content
For 8.9～13.3% half-dried slurry；
B () is put into above-mentioned half-dried slurry in mould and is vibrated in 20～50Hz frequency ranges, amplitude is 0.5～1.5mm,
Time of vibration is controlled in 10～40min, makes shaping slurry；
C () carries out the curing process of 30～60min to being molded slurry, make component base substrate；
D () after slurry curing takes out the rigid core in mould, component base substrate is removed from the molds；
E () is dried process to component base substrate, baking temperature is 20～90 DEG C, 8～24h of drying time；
F () component base substrate is completely dried after, the flexible core mold in mould is taken out.
The invention has the beneficial effects as follows：Due to reducing liquid content in the formula of its forming method slurry, meanwhile, which is special
The design of the flexible core mold in mould, it is to avoid the crackle that component is produced in volume contraction, while metal die also ensure that
Scantling precision, improves surface smoothness, extends the mold use life-span；Rigid die and the combination of flexible die
Design, solves the problems, such as that interior chamber size is more than the component core model of finish dimensional and cannot deviate from, while also ensuring that the chi of inner chamber
Very little precision.
Description of the drawings
Accompanying drawing is cavity structure ceramic component filling forming method Special mould structure schematic diagram of the present invention.
In figure, 1- base plates, the left half modules of 2-, 3- rigidity cores, 4- cover plates, 5- flexible core molds, the right half modules of 6-.
Specific embodiment
Embodiment 1：720g silica flours and 2280g silicon-carbide particles are mixed into powder, 480g Ludox, 60g lemons is subsequently adding
Lemon acid and 60g sodium carboxymethylcelluloses uniformly mix, and prepare the half-dried slurry of liquid content 13.3%；Half-dried by prepared
Slurry is put in particular manufacturing craft, vibrates 15min, amplitude 1mm, be filled up completely with full mold cavity to slurry on shaking platform；
Curing process, process time 30min are carried out to slurry；After slurry curing, rigid core is taken out, by component base substrate from mould
Die cavity in take out；Process is dried to component base substrate, and baking temperature is 50 DEG C, drying time 18h；Component base substrate is complete
After drying, flexible core mold is taken out.
Embodiment 2：560g silica flours and 1440g silicon-carbide particles are mixed into powder, 200g waterglass, 30g tetra- is subsequently adding
Ammonium hydroxide and 10g Sodium Polyacrylates uniformly mix, and prepare the half-dried slurry of liquid content 8.9%；By prepare half
Dry finish is put in particular manufacturing craft, vibrates 10min, amplitude 0.5mm, be filled up completely with full mould type to slurry on shaking platform
Chamber；Curing process, process time 40min are carried out to slurry；After slurry curing, take out rigid core, by component base substrate from
Take out in the die cavity of mould；Process is dried to component base substrate, and baking temperature is 20 DEG C, drying time 24h；Component base substrate
After being completely dried, flexible core mold is taken out.
Embodiment 3：1200g silica flours and 2800g silicon-carbide particles are mixed into powder, 560g polyvinyl alcohol, 48g is subsequently adding
Citric acid and 20g ammonium polyacrylates uniformly mix, and prepare the half-dried slurry of liquid content 12.1%；By the semi-dry pulp for preparing
Material is put in particular manufacturing craft, vibrates 30min, amplitude 1mm, be filled up completely with full mold cavity to slurry on shaking platform；Right
Slurry carries out curing process, process time 50min；After slurry curing, rigid core is taken out, by component base substrate from mould
Take out in die cavity；Process is dried to component base substrate, and baking temperature is 70 DEG C, drying time 10h；Component base substrate is completely dry
After dry, flexible core mold is taken out.
Embodiment 4：1750g silica flours and 3250g silicon-carbide particles are mixed into powder, 750g waterglass, 175g is subsequently adding
TMAH and 150g Sodium Polyacrylates uniformly mix, and prepare the half-dried slurry of liquid content 11.1%；To prepare
Half-dried slurry be put in particular manufacturing craft, on shaking platform vibrate 400min, amplitude 1.5mm, be filled up completely with full mould to slurry
Tool die cavity；Curing process, process time 60min are carried out to slurry；After slurry curing, rigid core is taken out, by component base
Body is taken out from the die cavity of mould；Process is dried to component base substrate, and baking temperature is 90 DEG C, drying time 8h；Component base
After body is completely dried, flexible core mold is taken out.
Embodiment 5：Referring to the drawings, above-mentioned silicon nitride/silicon carbide ceramic component filling forming method particular manufacturing craft, including epimorph
And core, the epimorph includes left half module 2, right half module 6, base plate 1, left half module 2, right half module 6 merge formed closed
Die cavity, and be fixed on base plate 1, charging aperture is left in left half module 2,6 top junction of right half module, with lid after the completion of charging
Plate 4 is covered, and base plate 1 is provided with and is matched pilot hole with 3 bottom of rigid core；Described core is by rigid core 3 and flexibility
Core 5 is constituted, and rigid core 3 is fixed on base plate 1 in pilot hole, and flexible core mold 5 is enclosed within rigid core 3.This is special
In mould, left half module 2, right half module 6, base plate 1, rigid core 3, cover plate 4 using 45# steel, CrWMn mould steel or
Person's aluminium alloy makes, and flexible core mold 5 is made using natural rubber, silicon rubber or plastic foam.
Claims (7)
1. a kind of cavity structure ceramic component filling forming method particular manufacturing craft, including epimorph and core, it is characterised in that：Institute
The epimorph that states includes that left half module, right half module and base plate, left half module, right half module merge to form closed die cavity, and be fixed on bottom
On plate, charging aperture is left in junction above left half module, the right half module, and base plate is provided with the assembling matched with rigid core bottom
Hole, cover plate are connected with epimorph；Described core includes rigid core and flexible core mold, the dress that rigid core is fixed on base plate
In distribution, flexible core mold is enclosed within rigid core.
2. cavity structure ceramic component filling forming method particular manufacturing craft according to claim 1, it is characterised in that：Described
Flexible core mold, its material is any one of vinyon foam, natural rubber, silicon rubber.
3. cavity structure ceramic component filling forming method particular manufacturing craft according to claim 1, it is characterised in that：Described
Epimorph, rigid core, its material is metal.
4. one kind carries out cavity structure ceramic component filling forming method using claim 1 particular manufacturing craft, it is characterised in that include
Following steps：
A powder, binding agent, dispersant, diluent are uniformly mixed by (), wherein, powder is 24～35 by mass percent
The silica flour of %, mass percent are 65～76% silicon-carbide particle composition, and binder content is the 10～16% of powder quality,
Dispersant for powder quality 0.5～3%, amount of diluent is the 0.5～3.5% of powder quality, makes liquid content
For 8.9～13.3% half-dried slurry；
B () is put into above-mentioned half-dried slurry in mould and is vibrated in 20～50Hz frequency ranges, amplitude is 0.5～1.5mm,
Time of vibration is controlled in 10～40min, makes shaping slurry；
C () carries out the curing process of 30～60min to being molded slurry, make component base substrate；
D () after slurry curing takes out the rigid core in mould, component base substrate is removed from the molds；
E () is dried process to component base substrate, baking temperature is 20～90 DEG C, 8～24h of drying time；
F () component base substrate is completely dried after, the flexible core mold in mould is taken out.
5. cavity structure ceramic component filling forming method according to claim 4, it is characterised in that：Described binding agent
Be polyvinyl alcohol, waterglass, Ludox any one.
6. cavity structure ceramic component filling forming method according to claim 4, it is characterised in that：Described dispersant
Be Sodium Polyacrylate, ammonium polyacrylate, sodium carboxymethylcellulose any one.
7. cavity structure ceramic component filling forming method according to claim 4, it is characterised in that：Described diluent
Be citric acid, TMAH any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710080516.1A CN106507732B (en) | 2007-01-18 | 2007-01-18 | Cavity structure ceramic component filling forming method and particular manufacturing craft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710080516.1A CN106507732B (en) | 2007-01-18 | 2007-01-18 | Cavity structure ceramic component filling forming method and particular manufacturing craft |
Publications (1)
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| CN106507732B true CN106507732B (en) | 2010-08-04 |
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| CN200710080516.1A Active CN106507732B (en) | 2007-01-18 | 2007-01-18 | Cavity structure ceramic component filling forming method and particular manufacturing craft |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107650239A (en) * | 2017-08-31 | 2018-02-02 | 安徽信息工程学院 | Gypsum injection forming mould |
| CN109665849A (en) * | 2019-01-09 | 2019-04-23 | 山东中鹏特种陶瓷有限公司 | Silicon carbide rotator and manufacturing process |
| CN109878006A (en) * | 2018-12-28 | 2019-06-14 | 上海中盟石油天然气有限公司 | The production method for manufacturing PDC drill bit rubber mold |
| CN110303159A (en) * | 2019-07-29 | 2019-10-08 | 河北工业职业技术学院 | Wear-resistant material molding equipment and method |
| CN114368059A (en) * | 2022-01-12 | 2022-04-19 | 陕西固勤材料技术有限公司 | Preparation method of large high-temperature pipe |
| CN117774112A (en) * | 2024-02-23 | 2024-03-29 | 山东三责半导体新材料有限公司 | Preparation method of large-size silicon carbide triple helical shaft |
-
2007
- 2007-01-18 CN CN200710080516.1A patent/CN106507732B/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107650239A (en) * | 2017-08-31 | 2018-02-02 | 安徽信息工程学院 | Gypsum injection forming mould |
| CN109878006A (en) * | 2018-12-28 | 2019-06-14 | 上海中盟石油天然气有限公司 | The production method for manufacturing PDC drill bit rubber mold |
| CN109665849A (en) * | 2019-01-09 | 2019-04-23 | 山东中鹏特种陶瓷有限公司 | Silicon carbide rotator and manufacturing process |
| CN109665849B (en) * | 2019-01-09 | 2021-08-31 | 山东中鹏特种陶瓷有限公司 | Silicon carbide rotor and manufacturing process |
| CN110303159A (en) * | 2019-07-29 | 2019-10-08 | 河北工业职业技术学院 | Wear-resistant material molding equipment and method |
| CN110303159B (en) * | 2019-07-29 | 2023-04-18 | 河北工业职业技术学院 | Wear-resistant material forming equipment and method |
| CN114368059A (en) * | 2022-01-12 | 2022-04-19 | 陕西固勤材料技术有限公司 | Preparation method of large high-temperature pipe |
| CN117774112A (en) * | 2024-02-23 | 2024-03-29 | 山东三责半导体新材料有限公司 | Preparation method of large-size silicon carbide triple helical shaft |
| CN117774112B (en) * | 2024-02-23 | 2024-05-24 | 山东三责半导体新材料有限公司 | Preparation method of large-size silicon carbide triple helical shaft |
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| DCSP | Declassification of secret patent |