CN107903058A - The method that zirconia ceramics cell phone rear cover is made using casting molding processes - Google Patents
The method that zirconia ceramics cell phone rear cover is made using casting molding processes Download PDFInfo
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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
- C04B35/48—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 zirconium or hafnium oxides, zirconates, zircon or hafnates
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- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
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- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/602—Making the green bodies or pre-forms by moulding
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Abstract
A kind of method that zirconia ceramics cell phone rear cover is made using casting molding processes, the zirconia ceramics powder raw material ball for making zirconia ceramics cell phone rear cover is ground, secondary wet process grinding is carried out after being mixed together stirring with additive again, obtain premix slurry, again premix slurry and organic plasticizer solution mixing system into certain viscosity mixed slurry, and third time grinding is carried out to mixed slurry, casting slurry is obtained, to the processing of casting slurry froth in vacuum；Casting slurry is allowed to flow into from container in zirconia ceramics cell phone rear cover mould again, and scraped with scraper with zirconia ceramics cell phone rear cover thickness coated on zirconia ceramics cell phone rear cover mould, peeled after drying, curing from above as rear cover green compact, then need to be punched green compact according to the size and dimension of zirconia ceramics cell phone rear cover, laminated working process, blank is made；Zirconia ceramics cell phone rear cover blank is obtained after sintering；Pass through working process again, obtain zirconia ceramics cell phone rear cover finished product.
Description
Technical field
The present invention relates to a kind of production method of cell phone rear cover, refers in particular to a kind of zirconia ceramics cell phone rear cover and makes
Method, this kind of zirconia ceramics cell phone rear cover production method are after making zirconia ceramics mobile phone using gel injection molding and forming technology
Lid, is mainly used for the making processing of zirconia ceramics cell phone rear cover, belongs to zirconia ceramics thin slice manufacture technology field.
Background technology
With the development of smart mobile phone, the requirement to mobile phone material is also higher and higher, zirconia ceramics cell phone rear cover by
It is very popular in its excellent performance, but popularization obstacle is result in since cost is higher, production capacity is insufficient, its main cause is
Zirconia ceramics cell phone rear cover needs to use high technology ceramics processing technology, and the production of its material and processing technology are more numerous and diverse, usually
Including tens procedures and countless technology controlling and process and control of material, the main powder body material including upstream, the shaping/burning in middle reaches
Several links such as knot, post-processing, each link, which all suffers from numerous variations, to be selected；Post-processing milled processed after sintering is only
Can be the improvement of surface property, to ensure the indexs such as the size of finished product, precision, it is necessary in material, green shaping, sintering process
, it is necessary to test and improve repeatedly, technical know-how here constitutes zirconia ceramics rear cover system for middle consideration shrinkage, uniformity
The huge difficult point made.And in existing zirconia ceramics cell phone rear cover manufacture, there are many deficiencies：
(1) the zirconia ceramics block of generally use dry pressing or isostatic pressing method production writing board shape, then by a large amount of follow-up at present
Processing（CNC）Into cell phone rear cover, the molding zirconia ceramics Density inhomogeneity of both approaches, intensity is given birth to less than gel injection-moulding method
The zirconia ceramics of production, and drying time is longer.
(2) the zirconia ceramics technique of existing Gel-casting process is generally made not permeable of metal or plastic or other material
The mould of water, produces zirconia ceramics porcelain block, more there are product air holes, the low grade of production efficiency is lacked using such gel injection-moulding method
Point.
(3) the blank allowance that existing zirconia ceramics cell phone rear cover sinters out is big, and zirconia ceramics is in itself
Processability be not fine, so subsequently the blank of sinter molding is ground, polish, the post processing such as drill adds
The manpower and materials expended in work link are excessive, and qualification rate is low, cause cost increase.
The presence of these problems all can cause the application of zirconia ceramics cell phone rear cover to be limited, therefore necessary this be added
To improve.
By patent retrieval and do not find there be the patent literature constructed with the present invention, have certain relation with the present invention
Patent mainly have it is following：
1st, Patent No. CN98103410.1, the patent of invention of entitled " doctor blade process for preparing of ceramic substrate ", the patent
A kind of doctor blade process for preparing of ceramic substrate is disclosed, using nontoxic dimethylbenzene/absolute ethyl alcohol as mixed solvent, poly- second
Enol butyral (PVB) is used as binding agent, and dibutyl phthalate (DBP) (DBP) and polyethylene glycol (PEG) are used as plasticizer, fish
Oil, oleic acid or triglyceride (GTO) are used as dispersant, and tributyl phosphate, organic silicone oil or alcohol-based mixtures are as de-bubble
Agent etc..It is made after casting slurry and curtain coating blank is made again, ceramic substrate is made through drying, dumping, sintering.
2nd, Patent No. CN201510591221.5, it is entitled " have wireless charging function zirconia ceramics rear cover and
The patent of invention of its manufacture method ", which disclose a kind of zirconia ceramics rear cover and its system with wireless charging function
Method is made, the zirconia ceramics rear cover is compound on the zirconia ceramics backboard with being coated in by zirconia ceramics backboard
Slurry cofiring and the zirconia ceramics rear cover obtained, the composite mortar are formed and zirconia ceramics backboard one through sintering
The Wireless charging coil of change, wherein the raw material for preparing the composite mortar include silver powder 70~80% by weight percentage,
Graphene 2~5%, carbon nanotubes 3~8%, glass dust 15~20%.
3rd, Patent No. CN201610206078.8, entitled " a kind of silica flour curtain coating prepares the side of silicon nitride ceramic substrate
The patent of invention of method ", which disclose a kind of method that silica flour curtain coating prepares silicon nitride ceramic substrate, belongs to insulated substrate skill
Art field.The present invention using silica flour and without machine aided burn additive as raw material, using castor oil as dispersant, using polyvinyl butyral resin as
Bonding agent, according to the chemical state and particle size of silicon powder surface, adds the plasticizer for being conducive to silica flour tape casting, prepares
Thickness is adjustable, surface is smooth, flawless and imperforate large area green compact, by green compact after dumping, by high temperature sintering system
It is more than 50Wm-1K-1 for thermal conductivity is gone out, bending strength is more than 600MPa, and fracture toughness is more than the silicon nitride of 8MPam1/2
Ceramic substrate.
4th, Patent No. CN99119237.0, entitled " the quick solidification stream of electronic ceramics substrate and thin slice ceramic component
Prolong forming method " patent of invention, which disclose the quick solidification stream of a kind of electronic ceramics substrate and thin slice ceramic component
Prolong forming method, this method dissolves after first mixing organic monomer and crosslinking agent with water, is prepared into pre-mixing liquor；Then by ceramics
Powder adds pre-mixing liquor with dispersant, by prepared slurry ball milling mixing, vacuumizes de-bubble；Added in slurry after de-bubble
Initiator and catalyst, the tape casting on casting machine, curtain coating solidify afterwards shaping；Sintering 0 obtains finished product.
Although some has been related to tape casting method to these above-mentioned patents, after some has been related to zirconia ceramics mobile phone
The production method of lid, but do not suggest that solving the problems, such as that zirconia ceramics cell phone rear cover makes presently, there are, also without reference to adopting
Zirconia ceramics cell phone rear cover is made with casting arrangement, therefore deficiency present in the manufacture of zirconia ceramics cell phone rear cover is simultaneously
It is not resolved, since zirconia ceramics cell phone rear cover is a kind of thin wall ceramic part, simply using current tape casting side
It is not all right when method is to make zirconia ceramics cell phone rear cover, it cannot still solve present in above-mentioned cell phone rear cover sheet ceramic making
Problem, therefore still need further to be improved.
The content of the invention
The problem of it is an object of the invention to in the presence of existing zirconia ceramics cell phone rear cover manufacturing process, propose
A kind of new zirconia ceramics cell phone rear cover manufacture method, the manufacture method can effectively eliminate zirconia ceramics density unevenness
It is even, the shortcomings of drying time is longer, and product air holes are more, and allowance is big, low production efficiency.
In order to reach this purpose, after making zirconia ceramics mobile phone using casting molding processes the present invention provides one kind
The method of lid, first grinds the zirconia ceramics powder raw material ball for making zirconia ceramics cell phone rear cover, then with making zirconium oxide
The additive of ceramic mobile phone rear cover is mixed together, and carries out secondary wet process grinding after mixing again, obtain premix slurry, then
Ground premix slurry is mixed with certain viscosity mixed slurry with organic plasticizer solution by appropriate proportioning, and to mixed
Close slurry and carry out third time grinding, obtain casting slurry, and froth in vacuum processing is carried out to casting slurry；Allow again casting slurry from
Flowed into container in zirconia ceramics cell phone rear cover mould, and scraped and be coated in zirconia ceramics cell phone rear cover thickness with scraper
On zirconia ceramics cell phone rear cover mould, through drying, cure after peel from above as zirconia ceramics cell phone rear cover green compact, then
Need to be punched green compact according to the size and dimension of zirconia ceramics cell phone rear cover, laminated working process, be made to be sintered
Zirconia ceramics cell phone rear cover blank；Zirconia ceramics cell phone rear cover blank is obtained after sintering；Pass through CNC working processes again,
Obtain zirconia ceramics cell phone rear cover finished product.
Further, described grind the zirconia ceramics powder raw material ball for making zirconia ceramics cell phone rear cover is by oxygen
Change and be ground in zircon ceramic powder material input ball mill, since zirconia ceramics cell phone rear cover requires height, so ground
Below 30 degrees Celsius of journey strict temperature control, milling time should be when 50~58 is small, to obtain granularity as 100-150nm fineness
Zirconia ceramics abrasive.
Further, it is the zirconium oxide after first time is ground to carry out secondary wet process grinding after the mixing again
Ceramic grinding material is mixed together with additive, then puts into and wet grinding is carried out in grinder, process of lapping strict temperature control 20-
30 degrees Celsius, milling time should be when 24~48 is small, to obtain premix slurry of the granularity as 50-100nm fineness.
Further, the additive includes dispersant and solid solution additive.
Further, the proportioning of the additive and zirconia ceramics powder raw material is zirconia ceramics powder raw material
100 parts by weight, with 1-5 parts of additives.
Further, the described premix slurry crushed is mixed and made into tool with organic plasticizer solution by appropriate proportioning
The mixed slurry for having certain viscosity is to mix premix slurry with organic plasticizer solution, by stirring and modulating into non-aqueous tape-casting
Mixed slurry；Premix slurry and organic plasticizer solution proportioning be：Premix 100 parts of slurry, 5-20 parts of organic plasticizer solution；
Mixing time is 60-90 minutes.
Further, it is described that ground premix slurry and organic plasticizer solution are mixed and made into tool by appropriate proportioning
It is to mix premix slurry with organic plasticizer solution to have certain viscosity mixed slurry, after stirring, is ground in input
It is ground in grinding machine, when milling time 24-48 is small, obtains the mixed slurry of 50-100nm fineness.
Further, the organic plasticizer solution include binding agent, solvent, defrother, plasticizer,；It is binding agent, molten
Agent, plasticizer, the proportioning of defrother are：Premix 100 parts of slurry, 1-5 parts of binding agent, 2-8 parts of solvent, 1-5 parts of plasticizer, de-bubble
1-5 parts of agent.
Further, it is described to carry out third time to mixed slurry to grind being to put into mixed slurry in grinder to grind
Mill, when milling time 24-48 is small, obtains the casting slurry of 50-100nm fineness.
Further, it is described to make the concrete technology step of zirconia ceramics cell phone rear cover such as using casting molding processes
Under：
1）Zirconia ceramics powder is put into ball mill and is ground, below 30 degrees Celsius of process of lapping strict temperature control,
Milling time should be when 50~58 is small, to obtain zirconia ceramics abrasive of the granularity as 100-150nm fineness；
2）Zirconia ceramics abrasive is mixed with additive, puts into secondary wet process grinding is carried out in grinder again, grinding
20-30 degrees Celsius of process strict temperature control, milling time should be when 24~48 is small, to obtain granularity as 50-100nm fineness
Premix slurry；
3）Premix slurry is had with ground premix slurry is mixed with organic plasticizer solution by appropriate proportioning again
Certain viscosity mixed slurry, and third time grinding is carried out to mixed slurry, obtain casting slurry；And vacuum is carried out to casting slurry
De-bubble is handled；Froth in vacuum processing carries out froth in vacuum, stirring speed in the vacuum sealing agitator tank that vacuum is -0.95Mpa
Spend for 60~120 revs/min, mixing time is 15~30 minutes.
4）Allow casting slurry to flow into from container in zirconia ceramics cell phone rear cover mould again, and made pottery with scraper with zirconium oxide
Porcelain cell phone rear cover thickness is scraped coated on zirconia ceramics cell phone rear cover mould, forms zirconia ceramics cell phone rear cover green compact；
5）Peeled after zirconia ceramics cell phone rear cover green compact are dried, are cured from mould as after zirconia ceramics mobile phone
Lid green compact, then need to be punched green compact, laminated working process according to the size and dimension of zirconia ceramics cell phone rear cover, system
Into zirconia ceramics cell phone rear cover blank to be sintered；
6）Zirconia ceramics cell phone rear cover blank is obtained after sintering；Pass through CNC working processes again, after obtaining zirconia ceramics mobile phone
Lid finished product.
The advantage of the invention is that：
The present invention takes casting molding processes to make zirconia ceramics cell phone rear cover, and by the improvement of casting molding processes, adopts
Thickness and uniformity amendment are carried out to zirconia ceramics cell phone rear cover tape casting with grinding three times, and by using scraper plate, made
Zirconia ceramics cell phone rear cover thickness must be made evenly；It can greatly reduce that allowance is big, cost is lower, qualification rate is significantly
Lifting.
Embodiment
With reference to specific embodiment, the present invention is further explained.
Embodiment one
A kind of method that zirconia ceramics cell phone rear cover is made using casting molding processes, will make zirconia ceramics mobile phone first
The zirconia ceramics powder raw material ball mill of rear cover, then the additive with making zirconia ceramics cell phone rear cover are mixed together, and are mixed
Secondary wet process grinding is carried out after stirring again, obtains premix slurry, then ground premix slurry and organic plasticizer solution
It is mixed by appropriate proportioning with certain viscosity mixed slurry, and third time grinding is carried out to mixed slurry, obtains curtain coating slurry
Material, and froth in vacuum processing is carried out to casting slurry；Casting slurry is allowed to flow into zirconia ceramics cell phone rear cover mould from container again
In tool, and scraped with scraper with zirconia ceramics cell phone rear cover thickness coated on zirconia ceramics cell phone rear cover mould, through dry
Peeled after dry, curing from above as zirconia ceramics cell phone rear cover green compact, then according to the size of zirconia ceramics cell phone rear cover
Need to be punched green compact with shape, laminated working process, zirconia ceramics cell phone rear cover blank to be sintered is made；Through sintering
After obtain zirconia ceramics cell phone rear cover blank；Pass through CNC working processes again, obtain zirconia ceramics cell phone rear cover finished product.
Further, it is described to try the zirconia ceramics powder raw material ball mill for making zirconia ceramics cell phone rear cover by oxygen
Change and be ground in zircon ceramic powder material input ball mill, since zirconia ceramics cell phone rear cover requires height, so ground
Below 30 degrees Celsius of journey strict temperature control, milling time should be when 50~58 is small, to obtain granularity as 100-150nm fineness
Zirconia ceramics abrasive.
Further, it is the zirconium oxide after first time is ground to carry out secondary wet process grinding after the mixing again
Ceramic grinding material is mixed together with additive, then puts into and wet grinding is carried out in grinder, process of lapping strict temperature control 20-
30 degrees Celsius, milling time should be when 24~48 is small, to obtain premix slurry of the granularity as 50-100nm fineness.
Further, the proportioning of the additive and zirconia ceramics powder raw material is zirconia ceramics powder raw material
100 parts by weight, with 2-8 parts of additives.
Further, the additive includes dispersant and/or solid solution additive.The dispersant is anionic
Carboxylic acid group polymers' dispersant；The solid solution additive is metallic yttrium or vanadium metal.Dispersant and solid solution additive are pressed
Mixed according to arbitrary proportion.
Further, the described premix slurry crushed is mixed and made into tool with organic plasticizer solution by appropriate proportioning
The mixed slurry for having certain viscosity is to mix premix slurry with organic plasticizer solution, by stirring and modulating into non-aqueous tape-casting
Mixed slurry；Premix slurry and organic plasticizer solution proportioning be：Premix 100 parts of slurry, 5-20 parts of organic plasticizer solution；
Mixing time is 60-90 minutes.
Further, it is described that ground premix slurry and organic plasticizer solution are mixed and made into tool by appropriate proportioning
It is to mix premix slurry with organic plasticizer solution to have certain viscosity mixed slurry, after stirring, is ground in input
It is ground in grinding machine, when milling time 24-48 is small, obtains the mixed slurry of 50-100nm fineness.
Further, the organic plasticizer solution include binding agent, solvent, defrother, plasticizer,；It is binding agent, molten
Agent, plasticizer, the proportioning of defrother are：Premix 100 parts of slurry, 1-5 parts of binding agent, 2-8 parts of solvent, 1-5 parts of plasticizer, de-bubble
1-5 parts of agent.
Further, it is described to carry out third time to mixed slurry to grind being to put into mixed slurry in grinder to grind
Mill, when milling time 24-48 is small, obtains the casting slurry of 50-100nm fineness.
Further, it is described to make the concrete technology step of zirconia ceramics cell phone rear cover such as using casting molding processes
Under：
1）Zirconia ceramics powder is put into ball mill and is ground, below 30 degrees Celsius of process of lapping strict temperature control,
Milling time should be when 50~58 is small, to obtain zirconia ceramics abrasive of the granularity as 100-150nm fineness；
2）Zirconia ceramics abrasive is mixed with additive, puts into secondary wet process grinding is carried out in grinder again, grinding
20-30 degrees Celsius of process strict temperature control, milling time should be when 24~48 is small, to obtain granularity as 50-100nm fineness
Premix slurry；
3）Premix slurry is had with ground premix slurry is mixed with organic plasticizer solution by appropriate proportioning again
Certain viscosity mixed slurry, and third time grinding is carried out to mixed slurry, obtain casting slurry；And vacuum is carried out to casting slurry
De-bubble is handled；Froth in vacuum processing carries out froth in vacuum, stirring speed in the vacuum sealing agitator tank that vacuum is -0.95Mpa
Spend for 60~120 revs/min, mixing time is 15~30 minutes；
4）Casting slurry is allowed to flow into from container in zirconia ceramics cell phone rear cover mould again, and with scraper with zirconia ceramics hand
Machine rear cover thickness is scraped coated on zirconia ceramics cell phone rear cover mould, forms zirconia ceramics cell phone rear cover green compact；
5）Peeled after zirconia ceramics cell phone rear cover green compact are dried, are cured from mould as after zirconia ceramics mobile phone
Lid green compact, then need to be punched green compact, laminated working process according to the size and dimension of zirconia ceramics cell phone rear cover, system
Into zirconia ceramics cell phone rear cover blank to be sintered；
6）Zirconia ceramics cell phone rear cover blank is obtained after sintering；Pass through CNC working processes again, after obtaining zirconia ceramics mobile phone
Lid finished product.
Embodiment two
As the principle of embodiment one, simply taken mold materials and slurry parameter have not same embodiment two, are
A kind of method that zirconia ceramics cell phone rear cover is made using casting molding processes, will make zirconia ceramics cell phone rear cover first
Zirconia ceramics powder raw material ball mill, then with make zirconia ceramics cell phone rear cover additive be mixed together, be mixed
Carry out secondary wet process grinding again afterwards, obtain premix slurry, then ground premix slurry and organic plasticizer solution by suitable
Third time grinding is carried out when proportioning is mixed with certain viscosity mixed slurry, and to mixed slurry, obtains casting slurry, and
Froth in vacuum processing is carried out to casting slurry；Casting slurry is allowed to flow into from container in zirconia ceramics cell phone rear cover mould again,
And scraped with scraper with zirconia ceramics cell phone rear cover thickness coated on zirconia ceramics cell phone rear cover mould, gone through vacuum
Peeled after bubble, dry, curing from above as zirconia ceramics cell phone rear cover green compact, then according to zirconia ceramics cell phone rear cover
Size and dimension needs to be punched green compact, laminated working process, and zirconia ceramics cell phone rear cover blank to be sintered is made；Through
Zirconia ceramics cell phone rear cover blank is obtained after sintering；Pass through CNC working processes again, obtain zirconia ceramics cell phone rear cover finished product.
Further, it is described to try the zirconia ceramics powder raw material ball mill for making zirconia ceramics cell phone rear cover by oxygen
Change and be ground in zircon ceramic powder material input ball mill, since zirconia ceramics cell phone rear cover requires height, so ground
Below 30 degrees Celsius of journey strict temperature control, milling time should be when 54~56 is small, to obtain granularity as 100-150nm fineness
Zirconia ceramics abrasive.
Further, it is the zirconium oxide after first time is ground to carry out secondary wet process grinding after the mixing again
Ceramic grinding material is mixed together with additive, then puts into and wet grinding is carried out in grinder, process of lapping strict temperature control 20-
30 degrees Celsius, milling time should be when 28~30 is small, to obtain premix slurry of the granularity as 50-100nm fineness.
Further, the additive includes dispersant and solid solution additive.
Further, the proportioning of the additive and zirconia ceramics powder raw material is zirconia ceramics powder raw material
100 parts by weight, with 3-5 parts of additives.
Further, the described premix slurry crushed is mixed and made into tool with organic plasticizer solution by appropriate proportioning
The mixed slurry for having certain viscosity is to mix premix slurry with organic plasticizer solution, by stirring and modulating into non-aqueous tape-casting
Mixed slurry；Premix slurry and organic plasticizer solution proportioning be：Premix 100 parts of slurry, organic plasticizer solution 10-15
Part；Mixing time is 60-90 minutes.
Further, it is described that ground premix slurry and organic plasticizer solution are mixed and made into tool by appropriate proportioning
It is to mix premix slurry with organic plasticizer solution to have certain viscosity mixed slurry, after stirring, is ground in input
It is ground in grinding machine, when milling time 26-28 is small, obtains the mixed slurry of 50-100nm fineness.
Further, the organic plasticizer solution include binding agent, solvent, defrother, plasticizer,；It is binding agent, molten
Agent, plasticizer, the proportioning of defrother are：Premix 100 parts of slurry, 2-5 parts of binding agent, 4-8 parts of solvent, 2-5 parts of plasticizer, de-bubble
2-5 parts of agent.
Further, it is described to carry out third time to mixed slurry to grind being to put into mixed slurry in grinder to grind
Mill, when milling time 26-30 is small, obtains the casting slurry of 50-100nm fineness.
Further, it is described to make the concrete technology step of zirconia ceramics cell phone rear cover such as using casting molding processes
Under：
1）Zirconia ceramics powder is put into ball mill and is ground, below 30 degrees Celsius of process of lapping strict temperature control,
Milling time should be when 54~56 is small, to obtain zirconia ceramics abrasive of the granularity as 100-150nm fineness；
2）Zirconia ceramics abrasive is mixed with additive, puts into secondary wet process grinding is carried out in grinder again, grinding
20-30 degrees Celsius of process strict temperature control, milling time should be when 28~30 is small, to obtain granularity as 50-100nm fineness
Premix slurry；
3）Premix slurry is had with ground premix slurry is mixed with organic plasticizer solution by appropriate proportioning again
Certain viscosity mixed slurry, and third time grinding is carried out to mixed slurry, milling time should be when 28~30 is small, to obtain granularity
For the premix slurry of 50-100nm fineness, casting slurry is obtained；And froth in vacuum processing is carried out to casting slurry；At froth in vacuum
Manage and froth in vacuum is carried out in the vacuum sealing agitator tank that vacuum is -0.95Mpa, mixing speed is 60~120 revs/min, is stirred
The time is mixed as 15~30 minutes；
4）Casting slurry is allowed to flow into from container in zirconia ceramics cell phone rear cover mould again, and with scraper with zirconia ceramics hand
Machine rear cover thickness is scraped coated on zirconia ceramics cell phone rear cover mould, forms zirconia ceramics cell phone rear cover green compact；
5）Peeled after zirconia ceramics cell phone rear cover green compact are dried, are cured from mould as after zirconia ceramics mobile phone
Lid green compact, then need to be punched green compact, laminated working process according to the size and dimension of zirconia ceramics cell phone rear cover, system
Into zirconia ceramics cell phone rear cover blank to be sintered；
6）Zirconia ceramics cell phone rear cover blank is obtained after sintering；Pass through CNC working processes again, after obtaining zirconia ceramics mobile phone
Lid finished product.
It will be apparent that it should be understood that these embodiments are only illustrative of the invention and is not intended to limit the scope of the invention,
After reading the present invention, modification of the those skilled in the art to the various equivalent forms of the present invention each falls within right appended by the application will
Seek limited range.
The advantage of the invention is that：
The present invention takes casting molding processes to make zirconia ceramics cell phone rear cover, and by the improvement of casting molding processes, adopts
Thickness and uniformity amendment are carried out to zirconia ceramics cell phone rear cover tape casting with grinding three times, and by using scraper plate, made
Zirconia ceramics cell phone rear cover thickness must be made evenly；It can greatly reduce that allowance is big, cost is lower, qualification rate is significantly
Lifting.
Claims (10)
1. a kind of method that zirconia ceramics cell phone rear cover is made using casting molding processes, will make zirconia ceramics hand first
The zirconia ceramics powder raw material ball mill of machine rear cover, then the additive with making zirconia ceramics cell phone rear cover are mixed together, and are mixed
Secondary wet process grinding is carried out again after closing stirring, obtains premix slurry, then ground premix slurry and organic plasticizer is molten
Liquid is mixed with certain viscosity mixed slurry by appropriate proportioning, and carries out third time grinding to mixed slurry, is cast
Slurry, and froth in vacuum processing is carried out to casting slurry；Casting slurry is allowed to flow into zirconia ceramics cell phone rear cover from container again
In mould, and scraped coated on zirconia ceramics cell phone rear cover mould, passed through with zirconia ceramics cell phone rear cover thickness with scraper
Peeled after dry, curing from above as zirconia ceramics cell phone rear cover green compact, then according to the ruler of zirconia ceramics cell phone rear cover
Very little and shape needs to be punched green compact, laminated working process, and zirconia ceramics cell phone rear cover blank to be sintered is made；Through burning
Zirconia ceramics cell phone rear cover blank is obtained after knot；Pass through CNC working processes again, obtain zirconia ceramics cell phone rear cover finished product.
2. making the method for zirconia ceramics cell phone rear cover using casting molding processes as claimed in claim 1, its feature exists
In：Described is former by zirconia ceramics powder by the zirconia ceramics powder raw material ball mill examination for making zirconia ceramics cell phone rear cover
It is ground in material input ball mill, since zirconia ceramics cell phone rear cover requires height, so process of lapping strict temperature control
Less than 30 degrees Celsius, milling time should be ground when 50~58 is small using obtaining zirconia ceramics of the granularity as 100-150nm fineness
Material.
3. making the method for zirconia ceramics cell phone rear cover using casting molding processes as claimed in claim 1, its feature exists
In：It is with adding by the zirconia ceramics abrasive after first time grinding to carry out secondary wet process grinding after the mixing again
Add agent to be mixed together, then put into and wet grinding is carried out in grinder, 20-30 degrees Celsius of process of lapping strict temperature control, grinding
Time should be when 24~48 is small, to obtain premix slurry of the granularity as 50-100nm fineness.
4. making the method for zirconia ceramics cell phone rear cover using casting molding processes as claimed in claim 3, its feature exists
In：The additive includes dispersant and solid solution additive.
5. making the method for zirconia ceramics cell phone rear cover using casting molding processes as claimed in claim 4, its feature exists
In：The proportioning of the additive and zirconia ceramics powder raw material is 100 parts by weight of zirconia ceramics powder raw material, with 1-5
Part additive.
6. making the method for zirconia ceramics cell phone rear cover using casting molding processes as claimed in claim 1, its feature exists
In：Described is mixed and made into mixing with certain viscosity with organic plasticizer solution the premix slurry crushed by appropriate proportioning
It is to mix premix slurry with organic plasticizer solution to close slurry, by stirring and modulating into non-aqueous tape-casting mixed slurry；Premix
The proportioning of slurry and organic plasticizer solution is：Premix 100 parts of slurry, 5-20 parts of organic plasticizer solution；Mixing time is 60-
90 minutes.
7. making the method for zirconia ceramics cell phone rear cover using casting molding processes as claimed in claim 6, its feature exists
In：Described ground premix slurry is mixed with organic plasticizer solution by appropriate proportioning is mixed with certain viscosity
Slurry is to mix premix slurry with organic plasticizer solution, after stirring, is ground in grinder is put into,
When milling time 24-48 is small, the mixed slurry of 50-100nm fineness is obtained.
8. making the method for zirconia ceramics cell phone rear cover using casting molding processes as claimed in claim 7, its feature exists
In：The organic plasticizer solution include binding agent, solvent, defrother, plasticizer,；Binding agent, solvent, plasticizer, de-bubble
The proportioning of agent is：Premix 100 parts of slurry, 1-5 parts of binding agent, 2-8 parts of solvent, 1-5 parts of plasticizer, 1-5 parts of defrother.
9. making the method for zirconia ceramics cell phone rear cover using casting molding processes as claimed in claim 1, its feature exists
In：The third time grinding that carried out to mixed slurry is to put into mixed slurry in grinder to be ground, milling time 24-
48 it is small when, obtain the casting slurry of 50-100nm fineness.
10. making the method for zirconia ceramics cell phone rear cover using casting molding processes as claimed in claim 1, its feature exists
In：The concrete technology step that zirconia ceramics cell phone rear cover is made using casting molding processes is as follows：
1）Zirconia ceramics powder is put into ball mill and is ground, below 30 degrees Celsius of process of lapping strict temperature control,
Milling time should be when 50~58 is small, to obtain zirconia ceramics abrasive of the granularity as 100-150nm fineness；
2）Zirconia ceramics abrasive is mixed with additive, puts into secondary wet process grinding is carried out in grinder again, grinding
20-30 degrees Celsius of process strict temperature control, milling time should be when 24~48 is small, to obtain granularity as 50-100nm fineness
Premix slurry；
3）Premix slurry is had with ground premix slurry is mixed with organic plasticizer solution by appropriate proportioning again
Certain viscosity mixed slurry, and third time grinding is carried out to mixed slurry, obtain casting slurry；And vacuum is carried out to casting slurry
De-bubble is handled；Froth in vacuum processing carries out froth in vacuum, stirring speed in the vacuum sealing agitator tank that vacuum is -0.95Mpa
Spend for 60~120 revs/min, mixing time is 15~30 minutes.
4）Casting slurry is allowed to flow into from container in zirconia ceramics cell phone rear cover mould again, and with scraper with zirconia ceramics hand
Machine rear cover thickness is scraped coated on zirconia ceramics cell phone rear cover mould, forms zirconia ceramics cell phone rear cover green compact；
5）Peeled after zirconia ceramics cell phone rear cover green compact are dried, are cured from mould as after zirconia ceramics mobile phone
Lid green compact, then need to be punched green compact, laminated working process according to the size and dimension of zirconia ceramics cell phone rear cover, system
Into zirconia ceramics cell phone rear cover blank to be sintered；
Zirconia ceramics cell phone rear cover blank is obtained after sintering；Pass through CNC working processes again, obtain zirconia ceramics cell phone rear cover
Finished product.
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| CN201711366286.5A CN107903058A (en) | 2017-12-18 | 2017-12-18 | The method that zirconia ceramics cell phone rear cover is made using casting molding processes |
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|---|---|---|---|
| CN201711366286.5A CN107903058A (en) | 2017-12-18 | 2017-12-18 | The method that zirconia ceramics cell phone rear cover is made using casting molding processes |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111548151A (en) * | 2020-05-19 | 2020-08-18 | 盐城工学院 | Colorful ceramic mobile phone backboard and production process thereof |
| CN111689774A (en) * | 2020-05-17 | 2020-09-22 | 陕西励峰德精密陶瓷科技有限公司 | Preparation process of ceramic rear cover |
-
2017
- 2017-12-18 CN CN201711366286.5A patent/CN107903058A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111689774A (en) * | 2020-05-17 | 2020-09-22 | 陕西励峰德精密陶瓷科技有限公司 | Preparation process of ceramic rear cover |
| CN111548151A (en) * | 2020-05-19 | 2020-08-18 | 盐城工学院 | Colorful ceramic mobile phone backboard and production process thereof |
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