CN108623312A - A kind of ceramic powders injection molding raw material and ceramic powders injection molding forming method - Google Patents
A kind of ceramic powders injection molding raw material and ceramic powders injection molding forming method Download PDFInfo
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- CN108623312A CN108623312A CN201810640007.8A CN201810640007A CN108623312A CN 108623312 A CN108623312 A CN 108623312A CN 201810640007 A CN201810640007 A CN 201810640007A CN 108623312 A CN108623312 A CN 108623312A
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Abstract
A kind of ceramic powders injection molding raw material, by forming following weight percentage components：Ceramic powders 89%~89.5%；Paraffin 4.32%~5.4%；Stearic acid wax 1.62%~2.43%；High density polyethylene (HDPE) 1.45%~1.61%；Dibutyl phthalate (DBP) 0.54%~0.86%；Low density polyethylene (LDPE) 1.45%~1.61%.The present invention also provides a kind of ceramic powders injection molding forming methods using above-mentioned raw materials.Ceramic powders injection molding raw material and ceramic powders injection molding forming method provided by the present invention, it can be ensured that the ceramic product of acquisition has larger intensity, is not easy to break into pieces, and product consistency is higher, and hole is uniform.
Description
Technical field
The present invention relates to a kind of ceramic powders injection molding raw material and ceramic powders injection molding forming methods.
Background technology
Ceramic powders injection molding process is a kind of novel system being combined ceramic powder with plastic cement injection molding technique
Make technology.The technology is suitble to produce ceramics zero that are small-sized, accurate, complicated and requiring with property in enormous quantities
Part.The basic process of the technique is：Ceramic powders and organic binder are uniformly mixed into the material to be deformed with hot-fluid, so
It uses die cavity of the injector injection with part shape to form blank afterwards, using binder, and high temperature sintering is deviate from, makes ceramics
High compaction becomes product, it may also be necessary to carry out post-processing.
The ceramic product produced by above-mentioned ceramic powders injection molding process, can generally obtain higher hardness, use
It can still meet needs to produce normal domestic use sintex etc., but the mechanical strength of such ceramic product is general, it is crisp
Property is larger, is easy to break into pieces.
And since bonding agent must be deviate from technique, there must be many small holes in product, generally make
With the long period, product surface is easy to absorb the material color contacted and change colour, but general ceramic powders injection molding
The ceramic product of technique productions very considers discoloration problem less, thus the micro-pore in these products be all it is unevenly distributed,
Caused consequence is that product dip dyeing color is also uneven, and surface is mottled after a period of use can't bear, and appearance is very poor.
Invention content
The technical problem to be solved in the present invention is to provide a kind of ceramic powders injection molding raw materials and ceramic powders to be molded
Forming method, the problem of being formerly mentioned is reduced or avoided.
Specifically, the present invention provides a kind of ceramic powders injection molding raw material and ceramic powders injection-moulded squares
Method has larger intensity with the ceramic product that this is obtained, and is not easy to break into pieces, and product consistency is higher, and hole is uniform.
In order to solve the above technical problems, the present invention proposes a kind of ceramic powders injection molding forming method, the method includes
Following steps：
Raw material mixes：Ceramic powders injection molding raw material is uniformly mixed into injection material；The wherein described ceramic powders note
Shaping raw material is moulded by forming following weight percentage components：Ceramic powders 89.00%~89.50%；Paraffin 4.32%~
5.40%；Stearic acid wax 1.62%~2.43%；High density polyethylene (HDPE) 1.45%~1.61%；Dibutyl phthalate (DBP)
0.54%~0.86%；Low density polyethylene (LDPE) 1.45%~1.61%；
Injection molding：It is molded the injection material to form blank；
Blank detects：A blank in the blank of a batch is selected, this blank is integrally immersed in ink
In water, soak at room temperature 4~6 hours, wherein the color of ink used is different from the color of the blank itself；By the institute after immersion
It states blank to pull out from the ink, is rinsed well the blank surface with clear water, if counting the surface face of the blank
The ratio that the identical area of color of color and the blank itself accounts for the gross area is more than 90%, then illustrates the blank of this batch
Interior solid is uniform, the structural ceramic product finally obtained it is up-to-standard；
Slough paraffin：The blank is soaked in the kerosene that temperature is 40~50 DEG C, constant temperature impregnates 4~6 hours, it is ensured that
95% or more paraffin is dissolved into kerosene in the blank；
Degreasing：The blank after paraffin will be sloughed to be put into sintering furnace, under normal temperature state, according to 1.1 DEG C of heating per minute
200 DEG C are risen to, is kept for 200 DEG C of 3 hours, 400 DEG C is risen to according still further to 1.1 DEG C of heating per minute, is kept for 400 DEG C of 3 hours, most
600 DEG C are risen to according to 1.1 DEG C of heating per minute afterwards, is kept for 600 DEG C of 3 hours, then cooled to room temperature；
Sintering：By the blank after degreasing, it is warming up to 1200~1500 DEG C in sintering furnace and sinters ceramic product into.
Preferably, in the raw material mixing step, by the raw material at a temperature of 200~250 DEG C, being continuously agitated makes
Other raw materials package that ceramic powders are fully melted.
Preferably, in the sintering step, under normal temperature state, it is uniformly heating to 100 DEG C in 1 hour, is kept for 100 DEG C
0.5 hour；Then it is uniformly heating to 450 DEG C in 6 hours, is kept for 450 DEG C 0.5 hour；Then it is uniformly heating in 5 hours
800 DEG C, kept for 800 DEG C 0.5 hour；Then it is uniformly heating to 1000 DEG C in 4 hours, is kept for 1000 DEG C 0.5 hour；Then exist
It is uniformly heating to 1200 DEG C in 4 hours, is kept for 1200 DEG C 0.5 hour；Then it is uniformly heating to 1450 DEG C in 4 hours, keeps
1450 DEG C 4 hours；Then in 6 hours uniform decrease in temperature to 1000 DEG C；Last cooled to room temperature.
The present invention also provides a kind of ceramic powders injection molding raw materials for the above method, by following weight percent
Group be grouped as：Ceramic powders 89.00%~89.50%；Paraffin 4.32%~5.40%；Stearic acid wax 1.62%~
2.43%；High density polyethylene (HDPE) 1.45%~1.61%；Dibutyl phthalate (DBP) 0.54%~0.86%；Low density polyethylene (LDPE)
1.45%~1.61%.
Preferably, the ceramic powders are the tetragonal zirconia polycrystal ceramic powders of stabilized with yttrium oxide.
Preferably, the ceramic powders are the nanometer scale ceramics powder made of Hydrolyze method or chemical precipitation method, grain size
It is 100~150 nanometers.
Preferably, the purity of the ceramic powders is 98.5%~99.8%.
Preferably, the mole percent level of yttria is 2.8-3.2% in the ceramic powders.
Preferably, the paraffin is substituted for microwax.
Ceramic powders injection molding raw material and ceramic powders injection molding forming method provided by the present invention, it can be ensured that obtain
The ceramic product obtained has larger intensity, is not easy to break into pieces, and product consistency is higher, hole is uniform.
Specific implementation mode
The present invention provides a kind of ceramic powders injection molding raw material and ceramic powders injection molding forming method, the methods
Ceramic product is produced using raw material disclosed in following embodiments, be suitble to mass production small-sized, accurate, complicated and there is particularity
The ceramic part that can be required.
Embodiment 1
A kind of ceramic powders injection molding raw material, by forming following weight percentage components：
Ceramic powders 89.00%；
Paraffin 5.40%；
Stearic acid wax (SA) 1.62%；
High density polyethylene (HDPE) (HDPE) 1.61%；
Dibutyl phthalate (DBP) (DBP) 0.86%；
Low density polyethylene (LDPE) (LDPE) 1.51%.
Wherein, the tetragonal zirconia polycrystal ceramics (contracting that major name is stabilized with yttrium oxide may be used in the ceramic powders
It is written as Y-TZP) powder.In a preferred embodiment, the ceramic powders are to be made of Hydrolyze method or chemical precipitation method
Nanometer scale ceramics powder, grain size 100.In a preferred embodiment, the purity of the ceramic powders is 98.5%.At one
In preferred embodiment, the mole percent level of yttria is 2.8% in the ceramic powders.
Wherein, on the one hand paraffin is used as organic binder, another effect is to increase the mobility of raw material entirety, is contained
It is poor to measure lazy flow, it can not normal injection molding；Product hole is excessive after too high levels slough paraffin, intensity be deteriorated and
Volume change is too big when product is sintered, and easy tos produce crackle.
Paraffin alias is solid paraffin and mineral wax, is solid-state alkane mixture.Paraffin is the solid put forward in oil
Crystalline product, by a variety of hydrocarbons, mainly normal alkane forms, also containing isoparaffin, cycloalkane and a small amount of fragrance
Hydrocarbon.The carbon atom number of paraffin grade wax is generally 22~36, and boiling spread is 300~550 DEG C.With the component of paraffin, boiling point, melt
Point increases, and the n-alkane of composition is reduced, and isoparaffin then increases.Pure paraffin is white, impure without tasteless
Paraffin is yellow.The paraffin of 58~60 trades mark may be used in the present embodiment.
In one particular embodiment of the present invention, paraffin can be replaced with microwax to use, better production is obtained with this
Moral character energy.Microwax is all extract in oil as paraffin, and difference lies in paraffin to come out from petroleum distillation
Fraction, and microwax is separated from the residual oil left after petroleum distillation.Microwax is originally ceresine, this be because
Natural ceresine mine was once exploited for people before over half a century.The main component of microwax is then that molecular weight is larger, band
There are the cycloalkane and aromatic hydrocarbon of longer carbon chain.So be called " microwax ", be because under the microscope it is apparent that it
Crystallization it is more much smaller than the crystallization of paraffin.The crystal habit of paraffin is usually larger-size thin slice, and microwax is usually
It is made of relatively fine needle-shaped or granular crystal.This just makes their property there are apparent difference, paraffin be it is brittle, by
Fracture is easy to after power even to crush；And microwax hardness is small, flexibility is fine, is easily deformed after stress, not easily broken.
Due to the difference of its molecular weight and molecular structure so that high as the plasticizing intensity of the blank of binder by microwax
In the blank by paraffin as binder, the brittleness decrease of blank is easily portable and code-disc.After being more conducive to blank making in this way
The processing and operation of middle process, improve the yield rate of processing procedure.
Due to the difference of its making technology, the purity of microwax is far above the purity of paraffin so that since binder is brought into
Impurity component reduce, the purity of ceramic powders improves after degreasing, reduces the product fraction defective that contains impurity after sintering.
The present invention also provides a kind of ceramic powders injection molding forming methods, and described method includes following steps：
Raw material mixes：Above-mentioned ceramic powders injection molding raw material is uniformly mixed into injection material.It is preferably implemented at one
In example, by the raw material at a temperature of 200~250 DEG C, preferably 230 DEG C~240 DEG C, being continuously agitated makes ceramic powders fill
Divide the other raw materials package being melted.
Injection molding：It is molded the injection material to form blank.In a preferred embodiment, injection temperature 250
℃。
Slough paraffin：The blank is soaked in the kerosene that temperature is 40~50 DEG C, constant temperature impregnates 4~6 hours, it is ensured that
95% or more paraffin is dissolved into kerosene in the blank.In a preferred embodiment, blank can be piled up and is impregnated
In kerosene slot, kerosene slot is placed in water-bath to be heated to 40 DEG C of holdings temperature-resistant.
Degreasing：The blank after paraffin will be sloughed to be put into sintering furnace, under normal temperature state, according to 1.1 DEG C of heating per minute
200 DEG C are risen to, is kept for 200 DEG C of 3 hours, 400 DEG C is risen to according still further to 1.1 DEG C of heating per minute, is kept for 400 DEG C of 3 hours, most
600 DEG C are risen to according to 1.1 DEG C of heating per minute afterwards, is kept for 600 DEG C of 3 hours, then cooled to room temperature.
Sintering：By the blank after degreasing, it is warming up to 1200~1500 DEG C in sintering furnace and sinters ceramic product into.At one
In preferred embodiment, in this sintering step, under normal temperature state, it is uniformly heating to 100 DEG C in 1 hour, is kept for 100 DEG C 0.5
Hour；Then it is uniformly heating to 450 DEG C in 6 hours, is kept for 450 DEG C 0.5 hour；Then 800 are uniformly heating in 5 hours
DEG C, kept for 800 DEG C 0.5 hour；Then it is uniformly heating to 1000 DEG C in 4 hours, is kept for 1000 DEG C 0.5 hour；Then small 4
When it is interior be uniformly heating to 1200 DEG C, kept for 1200 DEG C 0.5 hour；Then it is uniformly heating to 1450 DEG C in 4 hours, keeps 1450
DEG C 4 hours；Then in 6 hours uniform decrease in temperature to 1000 DEG C；Last cooled to room temperature.
The above method of the present invention sloughs paraffin for a long time by kerosene first, and paraffin, which volatilizees, when avoiding sintering causes hole
Gap is excessive and uneven, improves the intensity of product, is not easy to break into pieces, and product consistency is higher, and hole is uniform.
In other defatting step, using the gradual heating procedure of low temperature, up to more than ten hour low temperature heating,
In insulating process so that the organic binder except paraffin slowly melts, oozes out blank surface, and high temperature sintering is avoided to make these
Organic matter gasification generates a large amount of irregular stomatas, provides and improves the intensity that product is made, and product consistency is higher, hole
Uniformly.
The sintering step of conventional ceramic product may be used in last sintering step, and preferred sintering can also be used to walk
Suddenly.Wherein, preferred sintering step can gradually heat up, and product uneven heating is avoided to generate stomata, crackle etc..
Because while the step of sloughing paraffin and degreasing is have passed through, in blank it is also possible to there are some organic binders,
Disposably heat up it is excessively high be easy to be allowed to gasify suddenly generate stomata.In addition, after sloughing paraffin and defatting step due to process, base
Be inevitable with hole in part, in this way caused by consequence be that there are one to be expanded into receipts for these holes in sintering step
The process of contracting, last product with respect to blank for, in volume can exist 20% or more variation, therefore, if sintering temperature,
Temperature-rise period is improper, these holes will produce many not noticeable crackles, causes product strength to decline, also results in hole not
Uniformly, low density, easy dip dyeing color rear surface is mottled, and visual perception deteriorates.
The above-mentioned raw materials and method of the present invention are particularly suitable for production for electronic product, such as mobile phone, tablet computer etc.
Case member, such as camera retainer, speaker hole decoration, volume adjustment button etc., these components need for a long time by
Power, and be easy to be disseminated by human sweat, it is easily broken off if intensity is not high, compactness difference is also easy dip dyeing color, hole
It is uneven that surface can be caused mottled.Therefore, raw material provided by the present invention and method can overcome drawbacks described above completely.
Further, from the point of view of each step of above-mentioned ceramic powders injection molding forming method, removing bonding agent (removing paraffin
And skimming processes) need to spend for ten a few houres, high temperature sintering needs to spend 30 hours or so, and the process-cycle of the two steps is non-
It is often long, and need to expend a large amount of energy to be sintered to blank, if it is possible in the process to product quality into
Row detection, once it pinpoints the problems, so that it may to save subsequent job step, energy consumption is greatly saved, reduces cost.Namely
It says, some existing forming methods, such as fruit product existing defects, can only even produced after procedure of processing is fully completed
Product are used and could be found after a period of time, and it is also that It dones't help the situation to destroy product at this time.
Therefore, in the above-mentioned ceramic powders injection molding forming method of the present invention, it is further provided the step of blank detects, specifically
It is described as follows：
First is selected in the blank for not yet sloughing paraffin of a batch, this blank is integrally immersed in ink
In water, soak at room temperature 4~6 hours, wherein the color of ink used is different from the color of the blank itself.
For example, common ceramic product is all white, that is, the color that ceramic powders are original, other organic adhesives etc.
Substantially colourless, if containing impurity, the blank obtained will mix the color of some impurity, be in light gray or yellowish
Color has some black particle objects and is clipped in wherein once in a while.Ink color is typically dark color, and fountain pen ink available on the market is big
On body be black, blue or red, for ease of distinguish, using blue or red ink be advisable, black ink with it is black in blank
Coloured particles object is not easy to distinguish, and may gray after blank dip dyeing black ink, it is not easy to grey area with itself
It separates.
The blank after immersion is pulled out from the ink later, is rinsed well the blank surface with clear water,
If the ratio that the identical area of color of the surface color of the blank and the blank itself accounts for the gross area is more than 90%,
Illustrate that the blank interior solid is uniform, the ceramic product finally obtained it is up-to-standard.
For example, white blank is soaked in red ink after 4~6 hours, if there are loose to lack inside blank
It falls into, then the part of existing defects will be easy to dip dyeing into red, and the uniform part of interior solid still will present white, if leaching
Dying the area of red part, to account for the ratio of the gross area be more than 10%, that is, if the surface color and the blank sheet
The ratio that the identical area of color of body accounts for the gross area is less than 90%, then the loose part inside apparent blank is too many, finally
Quality will be difficult to ensure after product is made.Therefore, the blank of this batch can be scrapped in advance, does not also just need follow-up high energy consumption
High temperature sintering, be greatly saved cost.
Also a kind of situation, that is, inside blank all very uniformly, the surface color is biased to the ink after immersion
Color, then illustrate the blank internal defect, the ceramic product finally obtained it is off quality.For example, the blank leaching of white
For bubble in blue ink, last entire blank all becomes blue, illustrates that blank is generally very loose, last product quality
It is difficult to ensure.That is, the color that blank surface color is biased to ink is deeper, illustrate that the blank density is lower；Color is got over
More illustrate its density height close to original white.
The above situation is actually also frequent occurrence, that is, time of immersion if it exceeds 6 hours, even if blank sheet
Also very even compact is impregnated since ceramics have self-cleaning ability by long-time body, and ink finally can also pass through organic adhesive
Or the gap between ceramic powders enters inside blank, leads to not the quality that product is detected by way of impregnating ink.
Alternatively, if the time impregnated less than 4 hours, existing defects partially due to also have little time fully to disseminate, then frequently can lead to
Error judges that product quality is qualified, therefore soaking time of the present invention is creative：That is, not simple
It impregnates, or the time impregnated, the longer the better, but needs to select an interval range, this is that those skilled in the art are difficult to think
As acquisition.
In addition, it will be appreciated by those skilled in the art that since the blank detecting step of the present invention belongs to destructive detection, no
It may implement same detection to the product of entire batch, can only inspect by random samples, above-described embodiment is using in same batch
One sample is inspected by random samples, it is of course also possible to be inspected by random samples to multiple samples, is then analyzed statistical result, such as adopt
It is averaged with the method for conventional mathematical analysis or considers the modes such as statistical variance, judge the quality of product.
Embodiment 2
A kind of ceramic powders injection molding raw material, by forming following weight percentage components：
Ceramic powders 89.50%；
Paraffin 4.32%；
Stearic acid wax 2.13%；
High density polyethylene (HDPE) 1.60%；
Dibutyl phthalate (DBP) 0.85%；
Low density polyethylene (LDPE) 1.60%.
Wherein, the tetragonal zirconia polycrystal ceramics (contracting that major name is stabilized with yttrium oxide may be used in the ceramic powders
It is written as Y-TZP) powder.In a preferred embodiment, the ceramic powders are to be made of Hydrolyze method or chemical precipitation method
Nanometer scale ceramics powder, grain size are 150 nanometers.In a preferred embodiment, the purity of the ceramic powders is 99.8%.
In one preferred embodiment, the mole percent level of yttria is 3.2% in the ceramic powders.
The paraffin of 58~60 trades mark may be used in the present embodiment, microwax substitution paraffin can also be used to have obtained more preferably
Properties of product.
Ceramic powders injection molding forming method that the raw material of the present embodiment is equally applicable in embodiment 1 prepares product, on
It states raw material and method is equally applicable to case member of the production for electronic product, such as mobile phone, tablet computer etc., such as image
Head retainer, speaker hole decoration, volume adjustment button etc..
Embodiment 3
A kind of ceramic powders injection molding raw material, by forming following weight percentage components：
Ceramic powders 89.30%；
Paraffin 4.67%；
Stearic acid wax 2.43%；
High density polyethylene (HDPE) 1.45%；
Dibutyl phthalate (DBP) 0.54%；
Low density polyethylene (LDPE) 1.61%.
Wherein, the tetragonal zirconia polycrystal ceramics (contracting that major name is stabilized with yttrium oxide may be used in the ceramic powders
It is written as Y-TZP) powder.In a preferred embodiment, the ceramic powders are to be made of Hydrolyze method or chemical precipitation method
Nanometer scale ceramics powder, grain size are 125 nanometers.In a preferred embodiment, the purity of the ceramic powders is 99.2%.
In one preferred embodiment, the mole percent level of yttria is 3.0% in the ceramic powders.
The paraffin of 58~60 trades mark may be used in the present embodiment, microwax substitution paraffin can also be used to have obtained more preferably
Properties of product.
Ceramic powders injection molding forming method that the raw material of the present embodiment is equally applicable in embodiment 1 prepares product, on
It states raw material and method is equally applicable to case member of the production for electronic product, such as mobile phone, tablet computer etc., such as image
Head retainer, speaker hole decoration, volume adjustment button etc..
Embodiment 4
A kind of ceramic powders injection molding raw material, by forming following weight percentage components：
Ceramic powders 89.40%；
Paraffin 4.65%；
Stearic acid wax 2.30%；
High density polyethylene (HDPE) 1.50%；
Dibutyl phthalate (DBP) 0.70%；
Low density polyethylene (LDPE) 1.45%.
Wherein, the tetragonal zirconia polycrystal ceramics (contracting that major name is stabilized with yttrium oxide may be used in the ceramic powders
It is written as Y-TZP) powder.In a preferred embodiment, the ceramic powders are to be made of Hydrolyze method or chemical precipitation method
Nanometer scale ceramics powder, grain size are 110 nanometers.In a preferred embodiment, the purity of the ceramic powders is 99%.One
In a preferred embodiment, the mole percent level of yttria is 2.9% in the ceramic powders.
The paraffin of 58~60 trades mark may be used in the present embodiment, microwax substitution paraffin can also be used to have obtained more preferably
Properties of product.
Ceramic powders injection molding forming method that the raw material of the present embodiment is equally applicable in embodiment 1 prepares product, on
It states raw material and method is equally applicable to case member of the production for electronic product, such as mobile phone, tablet computer etc., such as image
Head retainer, speaker hole decoration, volume adjustment button etc..
Embodiment 5
A kind of ceramic powders injection molding raw material, by forming following weight percentage components：
Ceramic powders 89.10%；
Paraffin 5.00%；
Stearic acid wax 2.22%；
High density polyethylene (HDPE) 1.53%；
Dibutyl phthalate (DBP) 0.60%；
Low density polyethylene (LDPE) 1.55%.
Wherein, the tetragonal zirconia polycrystal ceramics (contracting that major name is stabilized with yttrium oxide may be used in the ceramic powders
It is written as Y-TZP) powder.In a preferred embodiment, the ceramic powders are to be made of Hydrolyze method or chemical precipitation method
Nanometer scale ceramics powder, grain size are 140 nanometers.In a preferred embodiment, the purity of the ceramic powders is 99.4%.
In one preferred embodiment, the mole percent level of yttria is 3.1% in the ceramic powders.
The paraffin of 58~60 trades mark may be used in the present embodiment, microwax substitution paraffin can also be used to have obtained more preferably
Properties of product.
Ceramic powders injection molding forming method that the raw material of the present embodiment is equally applicable in embodiment 1 prepares product, on
It states raw material and method is equally applicable to case member of the production for electronic product, such as mobile phone, tablet computer etc., such as image
Head retainer, speaker hole decoration, volume adjustment button etc..
Embodiment 6
A kind of ceramic powders injection molding raw material, by forming following weight percentage components：
Ceramic powders 89.20%；
Paraffin 5.14%；
Stearic acid wax 1.90%；
High density polyethylene (HDPE) 1.48%；
Dibutyl phthalate (DBP) 0.80%；
Low density polyethylene (LDPE) 1.48%.
Wherein, the tetragonal zirconia polycrystal ceramics (contracting that major name is stabilized with yttrium oxide may be used in the ceramic powders
It is written as Y-TZP) powder.In a preferred embodiment, the ceramic powders are to be made of Hydrolyze method or chemical precipitation method
Nanometer scale ceramics powder, grain size are 130 nanometers.In a preferred embodiment, the purity of the ceramic powders is 99.1%.
In one preferred embodiment, the mole percent level of yttria is 3.0% in the ceramic powders.
The paraffin of 58~60 trades mark may be used in the present embodiment, microwax substitution paraffin can also be used to have obtained more preferably
Properties of product.
Ceramic powders injection molding forming method that the raw material of the present embodiment is equally applicable in embodiment 1 prepares product, on
It states raw material and method is equally applicable to case member of the production for electronic product, such as mobile phone, tablet computer etc., such as image
Head retainer, speaker hole decoration, volume adjustment button etc..
Ceramic powders injection molding raw material and ceramic powders injection molding forming method provided by the present invention, it can be ensured that obtain
The ceramic product obtained has larger intensity, is not easy to break into pieces, and product consistency is higher, hole is uniform.
It will be appreciated by those skilled in the art that although the present invention is described in the way of multiple embodiments,
It is that not each embodiment only contains an independent technical solution.So narration is used for the purpose of for the sake of understanding in specification,
The skilled in the art should refer to the specification as a whole is understood, and by technical solution involved in each embodiment
Regard as and can be combined with each other into the mode of different embodiments to understand protection scope of the present invention.
The foregoing is merely the schematical specific implementation modes of the present invention, are not limited to the scope of the present invention.It is any
Those skilled in the art, do not depart from the design of the present invention and under the premise of principle made by equivalent variations, modification and combination,
The scope of protection of the invention should all be belonged to.
Claims (9)
1. a kind of ceramic powders injection molding forming method, described method includes following steps：
Raw material mixes：Ceramic powders injection molding raw material is uniformly mixed into injection material；The wherein described ceramic powders are molded into
Type raw material by forming following weight percentage components：Ceramic powders 89.00%~89.50%；Paraffin 4.32%~5.40%；
Stearic acid wax 1.62%~2.43%；High density polyethylene (HDPE) 1.45%~1.61%；Dibutyl phthalate (DBP) 0.54%~
0.86%；Low density polyethylene (LDPE) 1.45%~1.61%；
Injection molding：It is molded the injection material to form blank；
Blank detects：A blank in the blank of a batch is selected, this blank is integrally immersed in ink,
Soak at room temperature 4~6 hours, wherein the color of ink used is different from the color of the blank itself；By the base after immersion
Part is pulled out from the ink, is rinsed well the blank surface with clear water, if count the surface color of the blank with
The ratio that the identical area of color of the blank itself accounts for the gross area is more than 90%, then illustrates inside the blank of this batch
Dense uniform, the structural ceramic product finally obtained it is up-to-standard；
Slough paraffin：The blank is soaked in the kerosene that temperature is 40~50 DEG C, constant temperature impregnates 4~6 hours, it is ensured that described
95% or more paraffin is dissolved into kerosene in blank；
Degreasing：The blank after paraffin will be sloughed to be put into sintering furnace, under normal temperature state, risen to according to 1.1 DEG C of heating per minute
It 200 DEG C, is kept for 200 DEG C of 3 hours, rises to 400 DEG C according still further to 1.1 DEG C of heating per minute, kept for 400 DEG C of 3 hours, finally pressed
600 DEG C are risen to according to 1.1 DEG C of heating per minute, is kept for 600 DEG C of 3 hours, then cooled to room temperature；
Sintering：By the blank after degreasing, it is warming up to 1200~1500 DEG C in sintering furnace and sinters ceramic product into.
2. the method as described in claim 1, which is characterized in that in the raw material mixing step, by the raw material 200~
At a temperature of 250 DEG C, it is continuously agitated the other raw materials package for making ceramic powders fully be melted.
3. the method as described in claim 1, which is characterized in that in the sintering step, under normal temperature state, in 1 hour
100 DEG C are uniformly heating to, is kept for 100 DEG C 0.5 hour；Then it is uniformly heating to 450 DEG C in 6 hours, keeps 450 DEG C 0.5 small
When；Then it is uniformly heating to 800 DEG C in 5 hours, is kept for 800 DEG C 0.5 hour；Then 1000 are uniformly heating in 4 hours
DEG C, kept for 1000 DEG C 0.5 hour；Then it is uniformly heating to 1200 DEG C in 4 hours, is kept for 1200 DEG C 0.5 hour；Then 4
It is uniformly heating to 1450 DEG C in hour, is kept for 1450 DEG C 4 hours；Then in 6 hours uniform decrease in temperature to 1000 DEG C；It is last natural
It is cooled to room temperature.
4. a kind of ceramic powders injection molding raw material for the method described in one of claim 1-3, by following weight percent
The group of ratio is grouped as：Ceramic powders 89.00%~89.50%；Paraffin 4.32%~5.40%；Stearic acid wax 1.62%~
2.43%；High density polyethylene (HDPE) 1.45%~1.61%；Dibutyl phthalate (DBP) 0.54%~0.86%；Low density polyethylene (LDPE)
1.45%~1.61%.
5. ceramic powders injection molding raw material according to claim 4, which is characterized in that the ceramic powders are yttrium oxide
Stable tetragonal zirconia polycrystal ceramic powders.
6. ceramic powders injection molding raw material according to claim 5, which is characterized in that the ceramic powders are using water
The nanometer scale ceramics powder that solution or chemical precipitation method make, grain size are 100~150 nanometers.
7. ceramic powders injection molding raw material according to claim 6, which is characterized in that the purity of the ceramic powders is
98.5%~99.8%.
8. the ceramic powders injection molding raw material according to one of claim 5-7, which is characterized in that in the ceramic powders
The mole percent level of yttria is 2.8-3.2%.
9. ceramic powders injection molding raw material according to claim 4, which is characterized in that the paraffin is substituted for crystallite
Wax.
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| CN201810640007.8A CN108623312A (en) | 2018-06-21 | 2018-06-21 | A kind of ceramic powders injection molding raw material and ceramic powders injection molding forming method |
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| CN201810640007.8A CN108623312A (en) | 2018-06-21 | 2018-06-21 | A kind of ceramic powders injection molding raw material and ceramic powders injection molding forming method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112608147A (en) * | 2020-11-25 | 2021-04-06 | 科益展智能装备有限公司 | Integral zirconia ceramic cutting tool material and preparation method thereof |
| CN113526951A (en) * | 2021-07-01 | 2021-10-22 | 北京赛乐米克材料科技有限公司 | Preparation method of sound cavity based on polycrystalline zirconium gem |
-
2018
- 2018-06-21 CN CN201810640007.8A patent/CN108623312A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112608147A (en) * | 2020-11-25 | 2021-04-06 | 科益展智能装备有限公司 | Integral zirconia ceramic cutting tool material and preparation method thereof |
| CN113526951A (en) * | 2021-07-01 | 2021-10-22 | 北京赛乐米克材料科技有限公司 | Preparation method of sound cavity based on polycrystalline zirconium gem |
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Application publication date: 20181009 |