CN108162139A - A kind of method of ceramics double-shot moulding and double-colored ceramic - Google Patents
A kind of method of ceramics double-shot moulding and double-colored ceramic Download PDFInfo
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- CN108162139A CN108162139A CN201611156247.8A CN201611156247A CN108162139A CN 108162139 A CN108162139 A CN 108162139A CN 201611156247 A CN201611156247 A CN 201611156247A CN 108162139 A CN108162139 A CN 108162139A
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- injection material
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- shot moulding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/26—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor
- B28B1/261—Moulds therefor
- B28B1/262—Mould materials; Manufacture of moulds or parts thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/26—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor
- B28B1/261—Moulds therefor
- B28B1/262—Mould materials; Manufacture of moulds or parts thereof
- B28B1/263—Plastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/243—Setting, e.g. drying, dehydrating or firing ceramic articles
Abstract
A kind of method of ceramics double-shot moulding, belongs to ceramic injection molding field, including：Male model and the first master mold are molded, the first injection material is injected in the first die cavity surrounded in male model and the first master mold, obtains the first semi-finished product.Remove the first master mold, and the second master mold and male model are molded, inject the second injection material in the second die cavity surrounded in male model, the first master mold and the first semi-finished product, obtain the second semi-finished product.The shrinking percentage of first injection material and the second injection material difference is no more than 2%.Double-colored ceramic is made through degreasing, sintering in second semi-finished product.Easy to operate, equipment is simple the method achieve the double-shot moulding of ceramics, plastic complicated shape and unmanageable structural member, allowance is less, can reduce manufacture cost.The present invention also provides a kind of double-colored ceramics, are made using the method for above-mentioned ceramic double-shot moulding, accurate size, durable, and the ceramic materials of two kinds of colors is tightly combined, clear-cut.
Description
Technical field
The present invention relates to ceramic injection molding field, in particular to a kind of method of ceramic double-shot moulding with
And double-colored ceramic.
Background technology
The development history of ceramics is an important component part of Chinese civilization history, with progress of the epoch, ceramics are
It is widely used in the fields such as building, medicine, electronics, material.In the prior art, solid color is often made in ceramic, then
Again the diversification of its color, this production method complex procedures, low production efficiency, after colouring are realized by being surface-treated colouring
Ceramic be used for a long time wear after will appear the situation that color comes off.
Ceramic injection molding (CIM) is that current high technology ceramics are molded most popular technology, have can it is fast automatic into
Row produces, its technical process can be precisely controlled, plastic complicated shape and unmanageable structural member, allowance compared with
Less and the manufacture advantages such as cost can be reduced.But for ceramic two shot mold at present also in exploratory stage, technique
It is still immature.
The exploitation of the double-colored technique of ceramics has following difficult point：Firstly, since product needs the height by 1400~1700 DEG C
Temperature sintering link, shrinking percentage reaches 10~25% to product after sintering, it is ensured that receipts of two kinds of color materials under different warm areas
Contracting synchronism is very difficult；Secondly, organic matter accounting only has 10~25% in ceramic injected plastics material, remaining is zirconium oxide, oxygen
Change aluminium, the inorganic material such as silica, the change of material color mainly reaches by adjusting the proportioning of inorganic matter in material, but
When adjusting proportioning, the shrinking percentage of material can also change correspondingly, and be difficult to reconcile in color and two aspect of shrinking percentage；Finally, it is ceramic
Material because organic matter accounting is small, poor fluidity, in control of the green compact moulding process section to Shooting Technique, Mold Making precision
It is required that compared to plastic cement will height, particularly in the control of stress, technique adjustment is improper will be brought to entire product it is destructive
Problem.
Invention content
The purpose of the present invention is to provide a kind of methods of ceramic double-shot moulding, can be protected from process conditions level
The realization of the ceramic double-shot moulding of card, is tightly combined the ceramic material of two kinds of colors, clear-cut, this method operation letter
It is single, it is not high to equipment requirement, it is suitably applied industrialization large-scale production.
Another object of the present invention is to provide a kind of double-colored ceramic, using the side of above-mentioned ceramic double-shot moulding
Method is made, accurate size, durable, and the ceramic materials of two kinds of colors is tightly combined, clear-cut.
What the embodiment of the present invention was realized in：
A kind of method of ceramics double-shot moulding, including,
First injection step：Male model and the first master mold are molded, noted in the first die cavity surrounded in male model and the first master mold
Enter the first injection material, the first semi-finished product are obtained after a pressurize.
Second injection step：Remove the first master mold, and the second master mold and male model molded, male model, the first master mold and
The second injection material of injection, obtains the second semi-finished product after secondary pressurize in the second die cavity that first semi-finished product surround.First injection
Material and the second injection material shrinking percentage difference are no more than 2%, and the first injection material and the second injection material include 80~85wt%'s
The organic binder bond of ceramic inorganic ingredient and 15~20wt%
Post-processing step：Double-colored ceramic is made through degreasing, sintering in second semi-finished product.
A kind of double-colored ceramic, the method for using above-mentioned ceramic double-shot moulding are made.
The advantageous effect of the embodiment of the present invention is：A kind of method of ceramic double-shot moulding provided by the invention, selection
The different two parts of ceramic raw materials of color of the shrinking percentage difference no more than 2% keep two kinds of ceramic raw materials not as possible as injection material
With the contraction synchronism under warm area, shelled after shrinking the inconsistent double-colored chimeric surface sintering for leading to product to avoid two kinds of ceramic raw materials
From, be deformed, even cracking etc. bad phenomenons.Meanwhile using two-shot molding process, with reference to corresponding mold, pass through successively
It is molded twice, completes the preparation of double-colored ceramic.This method is easy to operate, equipment is simple, can use molding complicated shape and
Unmanageable structural member, allowance is less, can reduce manufacture cost.The double-colored ceramic made from this method cun essence
Really, durable, the ceramic materials of two kinds of colors is tightly combined, clear-cut.
Description of the drawings
It in order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range, for those of ordinary skill in the art, without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
The fabrication processing figure of a kind of double-colored ceramic that Fig. 1 is provided by the embodiment of the present invention；
A kind of schematic diagram of the double-colored ceramic that Fig. 2 is provided by the embodiment of the present invention under the first visual angle；
A kind of schematic diagram of the double-colored ceramic that Fig. 3 is provided by the embodiment of the present invention under the second visual angle；
A kind of signal of the double-colored ceramic that Fig. 4 is provided by the embodiment of the present invention in injection molding under molding state
Figure.
Icon：The double-colored ceramics of 100-；110- whitewares part；120- black ceramics part；130- black and white boundary；
The first semi-finished product of 140-；The first master molds of 210-；The second master molds of 220-；The first male models of 230a-；The second male models of 230b-；240- is rotated
Device；The first die cavitys of 250-；The second die cavitys of 260-.
Specific embodiment
Purpose, technical scheme and advantage to make the embodiment of the present invention are clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, builds according to normal condition or manufacturer
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
Have below to the method and double-colored ceramic of a kind of ceramic double-shot moulding of the embodiment of the present invention
Body explanation.
It is a kind of ceramics double-shot moulding method, specific technological process as shown in Figure 1, including：
Material preparation step：It selects and prepares shrinking percentage difference to be no more than the 2% the first injection material and the second injection materials respectively,
First injection material and the second injection material include the ceramic inorganic ingredient of 80~85wt% and the organic binder bond of 15~20wt%.
Further, ceramic inorganic ingredient ingredient based at least one of silica, aluminium oxide and zirconium oxide, matches
Close the colorant of 2~8wt%.Colorant is usually some coloured metallic compounds, and it is whole that addition can equally influence injection material
The shrinking percentage of body can pay the utmost attention to the required colorant assortment of object color component to be reached and dosage when injection material is configured,
The shrinking percentage of two parts of injection materials is adjusted to difference by adjusting the composition and ratio of bulk composition again and is no more than 2%.Ceramics
During double-shot moulding, if two different colors of injection material shrinking percentage difference is too big, molding double-colored pottery can be caused
The double-colored chimeric surface of ceramic products is removed after sintering, is deformed, even cracking situation.Shrinking percentage no more than 2%
Difference is inventor by the long-term controlled range that can ensure product integrality for having tried to combine experience and obtaining.It is excellent
Selection of land, when two kinds of injection materials carry out degreasing, sintering under same warm area, dumping process and contraction process keep synchronizing, to ensure more
Good contraction consistency.
Further, organic bond is based on high molecular polymer, cooperation lubricant, surfactant and plasticizer
Wait auxiliary materials.Preferably, high molecular polymer can be in polyethylene, polypropylene, polystyrene, polyvinyl acetate and polyformaldehyde
It is one or more；Lubricant can select one or more in paraffin, beeswax and vegetable oil；Surfactant can select
At least one of stearic acid, oleic acid, organosilan or stearate；Plasticizer can select repefral, neighbour
The common plasticizers such as diethyl phthalate, dibutyl phthalate.Specific composition and ratio need to be according to ceramic inorganic group
The concrete condition divided repeatedly is debugged, and while product strength is ensured, improves the mobility of injection material as much as possible.
Preferably, the first injection material and the second injection material need to dry 6~12h at 50~70 DEG C before the use.It is dry
The moisture retained in injection material can be excluded, prevents from generating a large amount of bubbles in injection moulding process, to ensure that each section during sintering is received
Shrinkage is consistent and the mechanical strength of end article.
A kind of method of ceramic double-shot moulding of the embodiment of the present invention further includes the first injection step：By male model and
One master mold molds, and injects the first injection material in the first die cavity surrounded in male model and the first master mold, and the is obtained after a pressurize
One semi-finished product.
Second injection step：Remove the first master mold, and the second master mold and male model molded, male model, the first master mold and
The second injection material of injection, obtains the second semi-finished product after secondary pressurize in the second die cavity that first semi-finished product surround.
Entire injection molding includes priority, and injection step, whole process can be by double-shot moulding machines come complete twice
Into.In first time injection step, the first injection material needs heating in advance, to ensure that the first injection material can have foot in injection moulding process
Enough mobility, to ensure being smoothed out for injection.Similarly, in second of injection step, the second injection material also needs
Heating in advance.Specific temperature selection, need the composition and ratio according to injection material, whole viscosity and molten condition come into
Row selection.Temperature setting is improper, and entire Shooting Technique can be caused to change, so as to size, structure and the mechanical property to product
It can affect.In inventor's long term test and in the case of combining experience, it is that can ensure to obtain 150~210 DEG C
The mobility of injection material is in the temperature range of optimum state.
Further, mold used in entire injection moulding process includes male model, the first master mold and the second master mold.Carry out
During injection, the temperature of mold is 30~70 DEG C, preferably 30~60 DEG C, to avoid stress it is excessive influence finished size, shape with
And appearance.
Meanwhile it according to factors such as the mobility of different injection materials and double-colored ceramic structure, meat thickness, needs to mould
The gate size of tool, which is done, further to be adjusted, it is ensured that product makes product uniformly reach most into during glue using minimum pressure
Big density.When double-colored ceramic length and width dimensions are in the range of 40~80mm, when thickness is in the range of 1~4mm, cast gate it is big
It is small should in 0.8~1.5mm, and the position of cast gate be located at double-colored ceramic geometric center position it is best.
Preferably, the adhesive containing part in injection molding semi-finished product has certain adhesion strength to mold die face,
Easily cause capping and exhausting problem.Therefore, in the design of thimble, it is contemplated that product is asked with mode fitting area problem with exhaust
Topic, product of the product length and width dimensions in 50mm × 50mm are ejected using a diameter of 2~5mm thimbles, more than the production of the size
Product then need to eject, and thimble exhaust clearance should be controlled in 0.02~0.04mm using the thimble of 5~15mm of diameter.In thimble
In arrangement, we are more also contemplated that the balance of ejection, and thimble ejection flatness should be in 0.1mm.
Preferably, because of ceramic material, there are the characteristics of high rigidity, and easily cut is caused to mold in forming process, so
The selection of mode material is also crucial, it is desirable that the steel for selecting hardness higher, such as SKD61, NAK80 etc., and make through Overheating Treatment
Its Rockwell hardness reaches more than 50 and comes into operation again.Meanwhile the requirement to mode and mold cavity surface roughness must be less than 10nm, with
Ensure mobility of the ceramic powder in cavity, release property.
Further, for the characteristic of ceramic material high rigidity, the screw rod of double-shot moulding machine need to be preferably wear-resisting, high hard
The metal screw of degree, and in its surface spraying a layer thickness in 0.15~0.25mm, Rockwell hardness make it in 60~70 alloy
Screw surface Rockwell hardness reaches 70 or so.The metal screw of high rigidity can reduce the loss rate of screw rod, to ensure to inject
The injection quality of material and product precision.
Preferably, the issuing velocity of the first injection material and the second injection material is 10~120mm/s.With the pressure of control injection
Scope control is among 50~150MPa, the injection die cavity for enabling injection material uniform and stable, to ensure the quality of product and essence
Degree.
In injection step twice, pressurize is required for, the shape to allow semi-finished product is stabilized.Preferably, in the first note
It moulds in step, when the filling rate of the first die cavity reaches 98~99%, switches to a pressurize.Similarly, in the second injection step
In, when the filling rate of the second die cavity reaches 98~99%, switch to secondary pressurize.It must accomplish in the control of pressurize switching point
Precisely, otherwise can bring viscosity flow road, mucous membrane, cast gate stress concentration and a series of problems, such as deform, crack.
Further, it is contemplated that the stress difference generated after cast gate stress and two kinds of color ceramic material collocation, it is primary to protect
Pressure and pressurize ranging from 30~120MPa of secondary pressurize, meanwhile, the pressurize difference of a pressurize and secondary pressurize should be less than 20%.
To ensure the even density of product, avoid the problem that the deformation as caused by unbalanced stress, stripping, cracking and size are unstable.
Preferably, cooling step is included after a pressurize and secondary pressurize, cooling time is 10~30s.Cooling can allow
The first semi-finished product and the geomery of the second semi-finished product arrived are more stablized, convenient for following process processing.
Switching between being molded twice can be realized by double-shot moulding machine.There are two types of double-shot moulding equipments
Individual plasticizing apparatus and tumbler, a shared clamping apparatus.First master mold and the second master mold are in stationary state, and two
A same male model, the first male model and the second male model are located on tumbler.During actual job, the first male model and the first master mold close
Mould forms the first die cavity, and the first injection material is injected the first die cavity forms the first semi-finished product, is molded after pressurize.Tumbler is turned
It is 180 ° dynamic, the first male model is made to mold to form the second die cavity together with the first semi-finished product and the second master mold, the second male model and the first master mold
Molding forms the first die cavity, and the same time injects the first injection material into the first die cavity and the second note is injected into the second die cavity
Shooting completes the making of the first semi-finished product and the second semi-finished product simultaneously.The second semi-finished product are ejected after pressurize, tumbler
180 ° of rotation, makes the second male model mold to form the second die cavity together with the first semi-finished product and the second master mold, the first male model and the first mother
Mould molds to form the first die cavity, repeats the making synchronous with the second semi-finished product of the first semi-finished product, realizes efficiently production.
A kind of method of ceramic double-shot moulding of the embodiment of the present invention further includes post-processing step：Second semi-finished product pass through
Double-colored ceramic is made in degreasing, sintering.
Preferably, defatting step can select thermal debinding, solvent degreasing or sour degreasing according to the specific ingredient of binding agent.
Further, thermal debinding is carried out at 500~800 DEG C, and degreasing post-shrinkage ratio is in 2%.Sintering is 1400
It is carried out at~1700 DEG C, sintering shrinkage is 10~25%.Further, degreasing and sintering are carried out using temperature programming, to keep away
Exempt from that temperature change is too fast, cause the systolic dyssynchrony of two kinds of injection materials.
A kind of double-colored ceramic, the method for using above-mentioned ceramic double-shot moulding are made.
Embodiment
The present embodiment provides a kind of double-colored ceramics 100, are specially the circular pottery being made of black-and-white two color ceramics
Ceramic products, as shown in Figures 2 and 3, with whiteware part 110 and black ceramic part 120, whiteware part
110 have clearly black and white boundary 130 with black ceramic part 120.It is made by following steps：
S1. material preparation step：Black injection material and white injection material are prepared respectively.Black injection material includes ceramic inorganic
80~85wt% of ingredient, 15~20wt% of organic binder bond.Wherein, ceramic inorganic ingredient by 92~98wt% zirconium oxide and
The black colorant composition of 2~8wt%.White injection material include ceramic inorganic 80~84wt% of ingredient, organic binder bond 16~
20wt%.Wherein, ceramic inorganic ingredient is made of the zirconium oxide of 80~95wt% and the aluminium oxide of 5~20wt%.By receiving
Shrinkage is tested, and the shrinking percentage difference between white injection material and black injection material is in the range of 0.1-1.5%.Organic binder bond selects
Bonding system based on polyethylene coordinates the surfactant of 1~2wt% and the plasticizer of 1~2wt%.
S2. injection step：Injection molding operation is carried out using double coloured plastic injection machine, before injection carries out, equipment is finely adjusted.
Surface spraying a layer thickness of metal screw makes its case hardness in 0.15~0.25mm, alloy of the Rockwell hardness 60~70
Reach 70 or so.
As shown in figure 4, the mold used in injection includes the first master mold 210, the second master mold 220 and identical first
Male model 230a and the second male model 230b, the first male model 230a and the second male model 230b are set on tumbler 240.The mould of mold
Benevolence hardness is 60, average surface roughness 5nm.Die venting in ejection, we select more 5.0mm thimbles, and
The air discharge duct of two 0.02~0.03mm of depth is increased on every thimble, packet gas and ejection absorption is avoided the occurrence of and is deformed, opens
Situations such as splitting.
After injection starts, white injection material and black injection material are first heated to 180 DEG C, mold is preheating to 50 DEG C, and
Stablize 10min.Again the first male model 230a and the first master mold 210 are molded to form the first die cavity 250, with the issuing velocity of 30mm/s
Black injection material is injected into the first die cavity 250, when 250 filling rate of the first die cavity reaches 98%, stops injection, switches to pressurize
Program, the pressurize 1.2s under the pressure of 60MPa.Postcooling 30s is completed in pressurize, is molded and is opened tumbler 240, by the first public affairs
The position of mould 230a rotates 180 °, and the first male model 230a is made to form second together with the first semi-finished product 140 and the molding of the second master mold 220
Die cavity 260, the second male model 230b and the molding of the first master mold 210 form the first die cavity 250, and the same time is into the first die cavity 250
It injects black injection material and white injection material is injected into the second die cavity 260, while complete the first semi-finished product 140 and the second half
The making of finished product (not shown).The injection of white injection material equally uses the issuing velocity of 30mm/s, in filling out for the second die cavity 260
The rate of filling stops injection, and switch to pressurize program when reaching 98%, the pressurize 1.5s under the pressure of 55MPa.In pressurize and cool down
The second semi-finished product are ejected after 30s, tumbler 240 rotates 180 °, makes the second male model 230b together with the first semi-finished product 140 and the
The molding of two master molds 220 forms the second die cavity 260, and the first male model 230a and the molding of the first master mold 210 form the first die cavity 250, weight
Multiple first semi-finished product 140 are synchronous with the second semi-finished product to be made, and realizes efficiently production.
Meanwhile when die sinking carries out position conversion, need the cast gate stress to the first semi-finished product 140 and the second semi-finished product
Layer or stress area (about 10~20mm positions) are directly removed using CNC and using temperature of the green compact shaping tool at 60~90 DEG C
By stress release under degree, its product flatness is made to reach in 0.1mm, is brought in sintering process by stress with reducing product
The influences such as deformation, Splaying at Gates.
S3. post-processing step：Double-colored ceramic 100 is made through degreasing, sintering in second semi-finished product.
Defatting step includes solvent degreasing step and thermal debinding step：Solvent degreasing step at 80 DEG C, by the second half into
Product are put into organic solvent for 24 hours.Then the second semi-finished product after solvent degreasing are placed in vacuum environment and carry out thermal debinding.Heat is de-
Fat uses temperature programming, and in 30~36h, by room temperature temperature is promoted to 350 DEG C, and maintain 1.5h.Further in 2~5h
It is interior, temperature is continued to lift up to 700 DEG C, and keep 1h, then stand 10~15h natural coolings.
After completing defatting step, the second semi-finished product are sintered, sintering is equally using temperature programming, in 5~10h,
Temperature is promoted to 600 DEG C by room temperature, and 1h is maintained to carry out low-temperature sintering.Further in 8~12h, temperature is continued to carry
1500~1550 DEG C are risen to, and 2h is maintained to carry out high temperature sintering, then stands 10~15h natural coolings.After sintering, into
Product are finely polished, and obtain double-colored ceramic 100.
Expected effect, particularly black and white have been fully meet by the double-colored ceramic 100 that above-mentioned preparation method obtains
The lapping defect of color at black and white boundary 130, can't see any gap, and black and white line is clear, nothing completely under 10 times of magnifying glass
Any colour contamination phenomenon.
In conclusion a kind of method of ceramic double-shot moulding provided by the invention, selects shrinking percentage difference to be no more than
The different two parts of ceramic raw materials of 2% color keep contraction of two kinds of ceramic raw materials under different warm areas same as possible as injection material
Step property is removed after shrinking the inconsistent double-colored chimeric surface sintering for leading to product to avoid two kinds of ceramic raw materials, is deformed, even
The bad phenomenons such as cracking.Meanwhile it using two-shot molding process, with reference to corresponding mold, by being successively molded twice, completes double
The preparation of color ceramic.This method is easy to operate, equipment is simple, can use molding complicated shape and unmanageable structural member,
Allowance is less, can reduce manufacture cost.Accurate, durable, the two kinds of face of the double-colored ceramic made from this method cun
The ceramic material of color is tightly combined, clear-cut.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, that is made any repaiies
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
- A kind of 1. method of ceramics double-shot moulding, which is characterized in that including,First injection step：Male model and the first master mold are molded, in the first die cavity that the male model and first master mold surround The first injection material of interior injection, obtains the first semi-finished product after a pressurize；Second injection step：Remove first master mold, and the second master mold and the male model are molded, in the male model, described The second injection material of injection in the second die cavity that second master mold and the first semi-finished product surround, obtained after secondary pressurize the second half into Product, first injection material and the second injection material shrinking percentage difference are no more than 2%, and first injection material and described the The organic binder bond of ceramic inorganic ingredient and 15~20wt% of two injection materials including 80~85wt%；Post-processing step：Second semi-finished product are carried out with degreasing, sintering.
- 2. the method for ceramics double-shot moulding according to claim 1, which is characterized in that in the described first injection step Suddenly, the temperature of first injection material is 150~210 DEG C；In second injection step, the temperature of second injection material It is 150~210 DEG C.
- 3. the method for ceramics double-shot moulding according to claim 1, which is characterized in that the male model, described first The temperature of master mold and second master mold is 30~70 DEG C.
- 4. the method for ceramics double-shot moulding according to claim 1, which is characterized in that first injection material and institute The issuing velocity for stating the second injection material is 10~120mm/s.
- 5. the method for ceramics double-shot moulding according to claim 1, which is characterized in that first injection material and institute The injection pressure for stating the second injection material is 50~150MPa.
- 6. the method for ceramics double-shot moulding according to claim 1, which is characterized in that in first injection step In, when the filling rate of first die cavity reaches 98~99%, switch to a pressurize；In second injection step In, when the filling rate of second die cavity reaches 98~99%, switch to the secondary pressurize.
- 7. the method for ceramics double-shot moulding according to claim 6 a, which is characterized in that pressurize and described The pressurize difference of the pressurize of secondary pressurize ranging from 30~120MPa, a pressurize and the secondary pressurize is less than 20%.
- 8. the method for ceramics double-shot moulding according to claim 1, which is characterized in that the method is further included institute The first injection material and second injection material are stated before injection at 50~70 DEG C the step of dry 6~12h.
- 9. the method for ceramics double-shot moulding according to claim 8, which is characterized in that the male model, described first The Rockwell hardness number of the mode of master mold and second master mold is more than 50, and surface roughness is less than 10nm.
- 10. a kind of double-colored ceramic, which is characterized in that by claim 1~9 any one of them ceramics double-shot moulding Method be made.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111300623A (en) * | 2020-03-25 | 2020-06-19 | 吴岱霖 | Mold for ceramic production and ceramic production process thereof |
| CN111978084A (en) * | 2020-09-03 | 2020-11-24 | 东莞信柏结构陶瓷股份有限公司 | Double-color ceramic injection process and double-color ceramic product |
| CN112549439A (en) * | 2020-11-09 | 2021-03-26 | 宁波圣捷喷雾泵有限公司 | Multicolor injection molding piece and injection molding process thereof |
| CN113306078A (en) * | 2021-05-27 | 2021-08-27 | 江苏瀚得威机械有限公司 | Forming process of double-color rubber watch band |
| CN113860870A (en) * | 2020-06-30 | 2021-12-31 | 比亚迪股份有限公司 | Multicolor ceramic product and injection molding method thereof |
| CN113860885A (en) * | 2020-06-30 | 2021-12-31 | 比亚迪股份有限公司 | Multicolor ceramic and preparation method thereof |
| CN113860883A (en) * | 2020-06-30 | 2021-12-31 | 比亚迪股份有限公司 | Multicolor ceramic and injection molding method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111300623A (en) * | 2020-03-25 | 2020-06-19 | 吴岱霖 | Mold for ceramic production and ceramic production process thereof |
| CN113860870A (en) * | 2020-06-30 | 2021-12-31 | 比亚迪股份有限公司 | Multicolor ceramic product and injection molding method thereof |
| CN113860885A (en) * | 2020-06-30 | 2021-12-31 | 比亚迪股份有限公司 | Multicolor ceramic and preparation method thereof |
| CN113860883A (en) * | 2020-06-30 | 2021-12-31 | 比亚迪股份有限公司 | Multicolor ceramic and injection molding method thereof |
| CN113860870B (en) * | 2020-06-30 | 2022-11-11 | 比亚迪股份有限公司 | Multicolor ceramic product and injection molding method thereof |
| CN113860883B (en) * | 2020-06-30 | 2022-12-09 | 比亚迪股份有限公司 | Multicolor ceramic and injection molding method thereof |
| CN111978084A (en) * | 2020-09-03 | 2020-11-24 | 东莞信柏结构陶瓷股份有限公司 | Double-color ceramic injection process and double-color ceramic product |
| CN112549439A (en) * | 2020-11-09 | 2021-03-26 | 宁波圣捷喷雾泵有限公司 | Multicolor injection molding piece and injection molding process thereof |
| CN113306078A (en) * | 2021-05-27 | 2021-08-27 | 江苏瀚得威机械有限公司 | Forming process of double-color rubber watch band |
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