CN108500201A - A kind of additive and its application method of water-soluble core - Google Patents
A kind of additive and its application method of water-soluble core Download PDFInfo
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- CN108500201A CN108500201A CN201810409201.5A CN201810409201A CN108500201A CN 108500201 A CN108500201 A CN 108500201A CN 201810409201 A CN201810409201 A CN 201810409201A CN 108500201 A CN108500201 A CN 108500201A
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- core
- water
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- liquid
- additive
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/18—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C23/00—Tools; Devices not mentioned before for moulding
- B22C23/02—Devices for coating moulds or cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/12—Treating moulds or cores, e.g. drying, hardening
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
Abstract
The additive and its application method of a kind of water-soluble core of the present invention, belong to casting technology field.The additive of the present invention includes water-soluble high-molecular material, organic acid and water-soluble inorganic salt, and water-soluble high-molecular material is used to be promoted the initial strength of core, and organic acid prevents from corroding for adjusting pH value, and water-soluble inorganic salt is used for the binder of core.The method of the present invention mixes additive with water, it is configured to injection liquid, injection liquid is successively sprayed onto to the discrete level of core, it is heated with infrared ray while sprinkling, pre-setting core is generated, pre-setting core is infiltrated or sprayed inorganic salt solution, and the core after infiltration is placed in progress intermittent type microwave in micro-wave oven and is heating and curing, core after solidification is sintered, and further increases the intensity of core.
Description
Technical field
The invention belongs to casting technology field, the specifically a kind of additive and its application method of water-soluble core.
Background technology
There is the largely aluminium alloy with complicated inner cavity and bending duct in automobile, engineering machinery and aerospace field
Casting.The mode that built-in metal core, resin sand core and water-soluble core can be used in these complicated aluminium alloy castings produces.Due to
Metal core core manufacturing craft is complicated, and easily causes environmental pollution using chemistry decoring, this promotes the organic resin of excellent combination property
Sand core is widely used in the production of such casting.However as the development of technology, the forming temperature of aluminium alloy castings drops
Low, the collapsibility performance of easily defeated and dispersed organic resin sand core weakens originally, while will produce toxic and harmful gas in casting process,
And there are waste water control difficulty, high energy consumption or sand grains to be crushed the problems such as serious for regenerating used.Therefore, there is efficient water-soluble collapsibility
The water-soluble core of energy and excellent environment complimentary nature has in the aluminium alloy castings production with complicated inner cavity and bending duct
It is widely applied foreground.
Currently, the production of water-soluble core mainly has the manufacturing process such as compacting sintering method, fluidised form casting.Compacting sintering method master
If after the raw material for preparing core is mixed, the compression moulding in core mold, then toasted at a certain temperature,
Sintering.
Through retrieval, invention and created name is：A kind of preparation method (application number for the water-soluble core model being used to prepare accurate device
For：201611087546.0 the applying date is：2016.12.01), this application using urea, sodium chloride, magnesium sulfate, niblet,
Saturated nacl aqueous solution, polyvinyl alcohol, nanometer titanium dioxide, carbon fiber etc. are raw material, and repressed molding and reheating are resisted
Curved performance is strong, high water solubility core, can apply to the production of Copper Pot craftwork；But this application is disadvantageous in that
The water-soluble core product cost of propertyization is high, and the production cycle is long, and the development cycle of novel water-soluble core product is longer.
In addition, invention and created name is：A kind of method for quickly forming and manufacturing ceramic core (application No. is：
201010222794.8 the applying date is：2010.07.12), low-temperature reinforcement agent and ceramic powder are uniformly mixed laggard by this method
Row SLS Quick-formings, then to obtaining the pretreatment of ceramic core green compact, then remove the low-temperature reinforcement agent in ceramic core green compact, leaching
High temperature adhesive is oozed, pre-burning and degreasing are carried out；High temperature sintering is finally carried out, that is, obtains final bulk ceramics core product.But it should
Application case is disadvantageous in that SLS formers are expensive, and is not suitable for the Quick-forming with water-soluble core.
Invention content
1. technical problems to be solved by the inivention
It is an object of the invention to longer, the personalized products that solves the traditional forming methods manufacturing cycle of existing water-soluble core
Production cost is higher and existing droplet ejection to shape water-soluble core with inorganic salt solution be injection liquid, there are nozzles to easily corrode,
Service life is shorter, and the problem that core strength is relatively low.A kind of additive and its application method of water-soluble core are provided, can be contracted
The manufacturing cycle of short water-soluble core, promote the service life of nozzle
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention is：
A kind of additive of water-soluble core of the present invention, including following component：Water-soluble high-molecular material, organic acid and water
Soluble inorganic salt, water-soluble high-molecular material are used to be promoted the initial strength of core, and organic acid prevents from corroding for adjusting pH value,
Water-soluble inorganic salt is used for the binder of core.
Preferably, the constituent content is as follows：Water-soluble high-molecular material 10%-20wt%, organic acid 0-5wt%, water
Soluble inorganic salt 75-90wt%.
Preferably, the water-soluble high-molecular material is starch, cellulose, polyethylene glycol, epoxy resin, polyacrylamide
One or more of Deng.
Preferably, the organic acid is one or more of acetic acid, citric acid, oxalic acid, sulfonic acid.
Preferably, the water-soluble inorganic salt be chloride, bromide, carbonate, sulfate, phosphate, nitrate, partially
One or more of aluminate, hydroxide, and the cation of a variety of water-soluble inorganic salts in the additive is the same.
A kind of application method of the additive of water-soluble core of the present invention, it is characterised in that：Any added using above-mentioned
Add agent, additive is mixed with water, be configured to injection liquid, injection liquid is successively sprayed onto to the discrete level of core, in sprinkling
It is heated simultaneously with infrared ray, generates pre-setting core, pre-setting core is infiltrated or sprayed inorganic salt solution, after infiltration
Core be placed in micro-wave oven carry out intermittent type microwave be heating and curing, the core after solidification is sintered.
Preferably, the method concrete operation step is as follows：
S100, configuration injection liquid, water is uniformly mixed with additive, is configured to the water that viscosity is 1-10cps, pH value is 7
Solution；
S200, droplet ejection forming and infrared heating are pre- solid, molding sand are laid on self-powered platform, liquid-jet device is pressed
The aqueous solution that the dropping liquid path injection S100 that core physical model generates is configured, waits for that the level fine liquid drop spray is completed, opens
Infrared heating plate carries out infrared heating solidification to the layer.After solidification, self-powered platform 0.01~1mm of downlink is sequentially completed
The dropping liquid process and infrared heating precuring process of follow-up discrete level, until the hydrojet and curing process of all discrete levels
It completes；
S300, infiltration or spray inorganic salt solution, the core after microwave curing is taken out, and infiltration or spray inorganic salts are molten
Liquid, soaking time t1, t1 ＜ 5min；
Core after infiltration is placed in progress intermittent type microwave in micro-wave oven and is heating and curing by S400, intermittent type microwave solidification,
It is taken out after the moisture in core fully scatters and disappears；
Core obtained by microwave curing is placed in sintering furnace and is sintered by S500, sintering, sintering temperature T, T=400-
1000 DEG C, sintering time t2, t2=1-4h.
Preferably, step S200 Sands can be one or more of silica sand, mullite sand, zircon sand, magnesia, described
The granularity of molding sand is 70~200 mesh, and the inorganic salt solution in the step S300 is identical as inorganic salt solution in step S100.
Preferably, the method is carried out using following device, and device includes molding sand spray unit, core solidified cell, type
Core infusion unit and core are sintered unit, and the molding sand spray unit includes matching liquid storehouse, liquid-jet device, laying device and infrared ray
Heating plate, with liquid storehouse for storing configured injection liquid, for being laid with molding sand, liquid-jet device is used for laying laying device
Molding sand injection injection liquid make molding sand aggregation condense into core to be solidified, infrared heating plate is for treating solidification core pre-add
Thermal finalization；Core solidified cell is solidified into solidification core for treating solidification core progress microwave heating；Core infusion unit
For being impregnated to becoming solidification core；Core sintering unit is for core to be sintered to be sintered.
Preferably, the molding sand spray unit further includes mixing device, material feeding platform, self-powered platform and controller, described
Material feeding platform is horizontally placed on the top of self-powered platform, and material feeding platform is moved up and down with the lifting of self-powered platform, described
Controller is used to control the nozzle parameter of liquid-jet device, and the liquid-jet device matches liquid storehouse, the hydrojet dress by woven hose connection
It sets and is slideably positioned on moving guide rail, which is horizontally placed on the top of material feeding platform, and liquid-jet device is on moving guide rail
The level sliding injection liquid of material feeding platform injection downwards, is provided with laying device, the stone between the material feeding platform and moving guide rail
Device is used to be laid with moulding sand mixture to material feeding platform.
3. advantageous effect
Using technical solution provided by the invention, compared with prior art, have the advantages that：
(1) additive and its application method of a kind of water-soluble core of the invention adds organic polymer in additive
Material can make water-soluble core obtain higher initial strength；For adjusting pH value, solve liquid-jet device (122) makes organic acid
The problem of with short life, water-soluble inorganic salt are used for the binder of core, increase intensity；Method is to mix additive and water
It closes, is configured to injection liquid, injection liquid is successively sprayed onto to the discrete level of core, added with infrared ray while sprinkling
Heat generates pre-setting core, and pre-setting core is infiltrated or sprayed inorganic salt solution, and the core after infiltration is placed in micro-wave oven
It carries out intermittent type microwave to be heating and curing, the core after solidification is sintered, and further increases the intensity of core；
(2) additive and its application method of a kind of water-soluble core of the invention, after core microwave heating is preforming, to type
Core carries out inorganic salt solution infiltration, secondary microwave solidification and sintering, can be abundant since the wettability of inorganic salt solution is extremely strong
The hole of wetting filling preform mandrel, and inorganic salts are precipitated in crystallization in secondary microwave solidification process, significantly improve core
Intensity；
(3) additive and its application method of a kind of water-soluble core of the invention carries out the powder bed for completing print out task
Whole microwave heating, wherein being sprayed with the part of microlayer model thermal post curing, the part for not spraying microlayer model can be micro- to being sprayed with
The part of drop is protected, and avoids the scratch of core in the handling process, and loose condition (of surface) is still kept after microwave heating.
During the cured coremaking of traditional heating, characteristics of heat transfer is that heat ecto-entad transmits, this makes core outer layer curing rate
Soon, internal layer moisture loss is more difficult, and core strength is relatively low.And the microwave curing that the present invention uses can be realized inside and outside while add
Heat, and intermittent microwave heating is conducive to the abundant loss of internal layer moisture, to ensure that the intensity of core；
(4) device of the additive and its application method of a kind of water-soluble core of the invention, use includes that molding sand spraying is single
Member, core solidified cell, core infusion unit and core are sintered unit, and core is realized by liquid-jet device and laying device
No mould quickly manufactures, and core solidified cell uses to be heated simultaneously inside and outside microwave heating realization, and intermittent microwave heating
The abundant loss for being conducive to internal layer moisture, to ensure that the intensity of core.
Description of the drawings
Fig. 1 is a kind of additive of water-soluble core of the present invention and its apparatus structure schematic diagram of application method；
Fig. 2 is a kind of additive of water-soluble core of the present invention and its method flow diagram of application method.
Label declaration in schematic diagram：
100, molding sand spray unit；110, mixing device；111, discharge port；120, match liquid storehouse；121, woven hose；122, it sprays
Liquid device；131, moving guide rail；132, fixed guide rail；141, material feeding platform；142, laying device；151, molded discrete layer；
161, working chamber；162, piston；163, self-powered platform；164, powder bed；170, controller；171, data-interface；
200, core solidified cell；210, micro-wave oven；220, holder；230, core to be solidified；
300, core infusion unit；310, inorganic salt solution slot；320, cure core；
400, core is sintered unit；410, sintering furnace；420, core to be sintered.
Specific implementation mode
To facilitate the understanding of the present invention, below with reference to relevant drawings to invention is more fully described, in attached drawing
Several embodiments of the present invention are given, still, the present invention can realize in many different forms, however it is not limited to this paper institutes
The embodiment of description, on the contrary, purpose of providing these embodiments is make it is more thorough and comprehensive to the disclosure.
It should be noted that when element is referred to as " being fixedly arranged on " another element, it can be directly on another element
Or there may also be elements placed in the middle；When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements；Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement are for illustrative purposes only.
Unless otherwise defined, all of technologies and scientific terms used here by the article and belong to the technical field of the present invention
The normally understood meaning of technical staff is identical；Used term is intended merely to description tool in the description of the invention herein
The purpose of the embodiment of body, it is not intended that in the limitation present invention；Term " and or " used herein includes one or more phases
Any and all combinations of the Listed Items of pass.
Embodiment 1
A kind of additive of water-soluble core of the present embodiment, additive include following component：Water-soluble high-molecular material
10%-20wt%, organic acid 0-5wt%, water-soluble inorganic salt 75-90wt%；Water-soluble high-molecular material is starch, fiber
One or more of element, polyethylene glycol, epoxy resin, polyacrylamide etc.；Organic acid is acetic acid, citric acid, oxalic acid, sulfonic acid
One or more of；Water-soluble inorganic salt is chloride, bromide, carbonate, sulfate, phosphate, nitrate, meta-aluminic acid
One or more of salt, hydroxide.Water-soluble high-molecular material plays the role of ensureing low-temperature bond strength, water-soluble nothing
Machine salt is main binder, ensures that core strength, organic acid play the role of adjusting pH value under high temperature degree.Due to addition
Agent and water are mixed into solution, and in subsequent heating process, moisture gradually evaporates, the components such as inorganic salts and water soluble polymer because
The decline of solubility and gradually depend on particle surface crystallization be precipitated form bonded bridge, to obtain certain initial strength.Due to nothing
The solution degree of machine salt in water is relatively low, and the amount of solution that liquid-jet device 122 sprays is relatively small, therefore, individually sprays nothing
Initial strength obtained by machine salting liquid is relatively low, and addition water-soluble high-molecular material can significantly improve the initial strength of core.Through leaching
After profit processing, the inorganic salt content in core significantly increases, and can significantly improve the intensity of core.And under high temperature sintering, it is water-soluble
For high molecular material because of pyrolytic, this can reduce the gas forming amount of core so that core strength improves.
The proportionate relationship of additive each component is：Water-soluble high-molecular material 10%-20wt%, organic acid 0-5wt%, water
Soluble inorganic salt 75-90wt%.Its configuration process is：Water-soluble high-molecular material and water-soluble inorganic salt are dissolved in respectively first
Then water is mixed and measures its pH value, then buret is used to instill organic acid, and the pH value for adjusting mixed solution is 7.Water
Soluble macromolecular material plays the role of promoting initial strength, and if too low, the promotion of initial strength is not apparent enough, too high
Words, solution viscosity are larger, it is difficult to spray from nozzle, and be decomposed not exclusively in subsequent high-temperature heating process so that core is sent out
Tolerance is excessively high.The effect of organic acid has centainly nozzle since neutral or alkalinity is presented in the aqueous solution of used inorganic salts
Corrosiveness, organic acid, which is added, can be adjusted the pH value of solution, but the content of acid crosses conference and causes solution that acidity is presented, and also can
Cause the corrosion of nozzle.Water-soluble inorganic salt is the binder of core, and the higher the better for content in theory, but since it is water-soluble
Solution degree it is limited, and the amount of solution of nozzle injection is limited, therefore the initial strength of core is not high, thus water soluble polymer material
Expect 10%-20wt%.
A kind of application method of the additive of water-soluble core of the present embodiment, additive is mixed with water, is configured to spray
Injection liquid is successively sprayed onto the discrete level of core by liquid, is heated with infrared ray while sprinkling, generates pre-setting type
Core, pre-setting core are infiltrated or are sprayed inorganic salt solution, and the core after infiltration, which is placed in micro-wave oven, carries out intermittent type microwave
It is heating and curing, the core after solidification is sintered.
The method is as follows：
S100, configuration injection liquid, water is uniformly mixed with additive, is configured to that viscosity is 1-10cps, pH value is 7
Aqueous solution；
S200, droplet ejection forming and infrared heating are pre- solid, and molding sand is laid on self-powered platform 163, hydrojet dress
The aqueous solution that the dropping liquid path injection S100 that 122 are generated by core physical model is configured is set, waits for that the level fine liquid drop spray is complete
At opening infrared heating plate 180 carries out infrared heating solidification to the layer.After solidification, 163 downlink 0.01 of self-powered platform~
1mm is sequentially completed the dropping liquid process and infrared heating precuring process of follow-up discrete level, until the spray of all discrete levels
Liquid and curing process are completed；
S300, infiltration or spray inorganic salt solution, the core after microwave curing is taken out, and infiltration or spray inorganic salts are molten
Liquid, time are no more than 5min；
S400, intermittent type microwave solidification, the core after infiltration is placed in micro-wave oven 210 and carries out intermittent type microwave heating admittedly
Change, is taken out after the moisture in core fully scatters and disappears；
Core obtained by microwave curing is placed in sintering furnace 410 and is sintered by S500, sintering, and sintering temperature is in 400-
1000 DEG C, sintering time 1-4h.
The additive of step S100 includes following component：Water-soluble high-molecular material 10%-20wt%, organic acid 0-
5wt%, water-soluble inorganic salt 75-90wt%.Water-soluble high-molecular material be starch, cellulose, polyethylene glycol, epoxy resin,
One or more of polyacrylamide etc.；Organic acid is one or more of acetic acid, citric acid, oxalic acid, sulfonic acid；It is water-soluble
Inorganic salts be chloride, bromide, carbonate, sulfate, phosphate, nitrate, meta-aluminate, one kind in hydroxide or
It is several.
Step S200 Sands can be one or more of silica sand, mullite sand, zircon sand, magnesia, the molding sand
Granularity is 70~200 mesh.Inorganic salts used are identical as inorganic salts described in step S100 in inorganic salt saturated solution in step S300.
Sintering temperature in the step S500 is T, T=590~690 DEG C.The sun of a variety of water-soluble inorganic salts in the additive
Ion is the same.Inorganic salt solution in the step S300 is identical as inorganic salt solution in step S100
The method of this implementation using following device carry out, device include molding sand spray unit 100, core solidified cell 200,
Core infusion unit 300 and core are sintered unit 400, and molding sand spray unit 100 includes with liquid storehouse 120, liquid-jet device 122 and paving
Expect device 142, with liquid storehouse 120 for storing configured injection liquid, laying device 142 is for being laid with molding sand, liquid-jet device 122
For making molding sand aggregation condense into core 230 to be solidified to the molding sand injection injection liquid laid；Core solidified cell 200 is used
It is solidified into solidification core 320 in treating the solidification progress microwave heating of core 230, core 230 to be solidified is positioned over holder 220
On；Core infusion unit 300 is used to impregnate to becoming solidification core 320；Core is sintered unit 400 and is used for type to be sintered
Core 420 is sintered.
The molding sand spray unit 100 of the present embodiment further includes mixing device 110, material feeding platform 141,163 and of self-powered platform
Controller 170, the mixing device 110 are used for mixed mould sand, and the molding sand includes in silica sand, mullite sand, zircon sand, magnesia
One or more, and the granularity of molding sand is 70~200 mesh；The material feeding platform 141 is horizontally placed on the upper of self-powered platform 163
Side, and material feeding platform 141 is moved up and down with the lifting of self-powered platform 163, the surface of the self-powered platform 163 is equipped with powder
The lower end of bed 164, self-powered platform 163 is equipped with working chamber 161 and piston 162, and the piston 162 pushes self-powered platform 163
It is moved up and down in working chamber 161.
Controller 170 is used to control the nozzle parameter of liquid-jet device 122, and controller 170 is equipped with data-interface 171 for passing
Send data.The liquid-jet device 122 matches liquid storehouse 120 by the connection of woven hose 121, and the liquid-jet device 122 is slideably positioned in shifting
On dynamic guide rail 131, which is horizontally placed on the top of material feeding platform 141, and liquid-jet device 122 is on moving guide rail 131
The level sliding injection liquid of the injection of material feeding platform 141 downwards, moving guide rail 131 are connected with fixed guide rail 132, fixed guide rail 132 with
Moving guide rail 131 is vertically installed in same level.The discharge port 111 of the mixing device 110 is connected with laying device
142, laying device 142 is provided between material feeding platform 141 and moving guide rail 131, which is used for material feeding platform
141 are laid with the molding sand laying device 142 for being laid with molding sand to material feeding platform 141.
100 workflow of molding sand spray unit is as follows：First the injection liquid configured is put into in liquid storehouse 120, to batch mixing
Be added moulding sand mixture in device 110, moulding sand mixture by discharge port 111 fall on the moulding sand mixture on material feeding platform 141 by
Laying device 142 is laid on the powder bed 164 being placed on self-powered platform 163, and laying device 142 often moves one and is back and forth
One layer of stone on molded discrete layer 151.Described is connected by woven hose 121 with liquid-jet device 122 with liquid storehouse 120, should
On moving guide rail 131, liquid-jet device 122 is controlled by controller 170 and is slided along moving guide rail 131 122 carry of liquid-jet device, should
The control of 131 also controlled device 170 of moving guide rail is slided along fixed guide rail 132, and 180 carry of infrared heating plate is in fixed guide rail
On 132, the 180 also controlled device 170 of infrared heating plate control treats solidification core 230 along the fixed sliding of guide rail 132
Carry out pre-add heat fixation；The data-interface 171 of controller 170 is connected with host computer, which downloads what host computer generated
The running orbit file of the discrete obtained discrete level dropper of the CAD geometry entity model layers of sand core is to control hydrojet dress
122 are set to move in the horizontal direction.The working chamber 161 is arranged in the lower section of liquid-jet device 122, is provided in the working chamber 161
Self-powered platform 163, the self-powered platform 163 are connected with by motor-driven piston 162, and piston 162 drives lifting work
Make the lower movement in the vertical direction of platform 163.
The core solidified cell 200 of the present embodiment includes micro-wave oven 210, and the micro-wave oven 210 is for treating solidification core 230
Intermittent type microwave heating is carried out, core 230 to be solidified becomes solidification core 320 after being fully cured.
The core infusion unit 300 of the present embodiment includes inorganic salt solution slot 310, is held in the inorganic salt solution slot 310
There are inorganic salt solution identical with inorganic salts ingredients in injection liquid, inorganic salt solution slot 310 to be used to soak solidification core 320
Bubble, soaking time t1, t1 ＜ 5min.
The core sintering unit 400 of the present embodiment includes sintering furnace 410, and the sintering furnace 410 is for treating sintering core 420
It is sintered, sintering temperature T, T=400-1000 DEG C, sintering time t2, t2=1-4h.
Embodiment 2
A kind of application method of the additive of water-soluble core of the present embodiment, is as follows：
S100, configuration injection liquid, are dissolved in water, being configured to viscosity is by water and polyvinyl alcohol, sodium chloride, sodium carbonate, oxalic acid
3cps, the aqueous solution that pH value is 7.
S200, the droplet ejection forming of water-soluble core and intermittent infrared heating precuring, 100/140 mesh silica sand is put down
It is layered on self-powered platform 163, the water that the dropping liquid path injection S100 that liquid-jet device 122 is generated by core physical model is configured
Solution waits for that the level fine liquid drop spray is completed, and it is solid to the intermittent infrared heating of layer progress to open infrared heating plate 180
Change.After solidification, 163 downlink 0.1mm of self-powered platform is sequentially completed the dropping liquid process of follow-up discrete level and intermittent infrared ray
Precuring process is heated, until the hydrojet of all discrete levels and curing process are completed.
S300, spray inorganic salt solution, the core after infrared ray precuring is taken out, Na is infiltrated+//Cl-、CO32--H2O bodies
The solution of system at normal temperatures, spray time 10-15s.
S400, intermittent type microwave are heating and curing, and the core after infiltration is placed in micro-wave oven 210 and carries out intermittent heating,
It is taken out after solution moisture content testing in core scatters and disappears completely.
S500, it core obtained by microwave curing is placed in sintering furnace 410 is sintered, sintering temperature is burnt at 780 ± 10 DEG C
The knot time is 1-2h.
Embodiment 3
A kind of application method of the additive of water-soluble core of the present embodiment, is as follows：
S100, configuration injection liquid, are dissolved in water by water and polyethylene glycol, polyacrylamide, potassium chloride, potassium carbonate, citric acid,
It is configured to the aqueous solution that viscosity is 2cps, pH value is 7；
S200, the droplet ejection forming of water-soluble core and continuous schedule infrared heating precuring, by the silica sand of 70/100 mesh
It is laid in after mixing on self-powered platform 163 in 7: 3 ratio with 100/140 mesh magnesia sand, liquid-jet device 122 presses core
The aqueous solution that the dropping liquid path injection S100 that physical model generates is configured, waits for that the level fine liquid drop spray is completed, opens infrared
Line heating plate 180 carries out infrared heating precuring to the layer.After solidification, 163 downlink 0.2mm of self-powered platform is sequentially completed
The dropping liquid process of follow-up discrete level and infrared heating precuring, until the hydrojet of all discrete levels and curing process are complete
At；
S300, infiltration inorganic salt solution, the core after infrared ray precuring is taken out, K is infiltrated+//Cl-、CO32--H2O bodies
The solution of system at normal temperatures, infiltrating time 20-30s；
S400, intermittent type microwave are heating and curing, and the core after infiltration is placed in micro-wave oven 210 and carries out intermittent heating,
Band core takes out after being fully cured.
Embodiment 4
A kind of application method of the additive of water-soluble core of the present embodiment, is as follows：
S100, configuration injection liquid, are dissolved in water by water and polyethylene glycol, polyacrylamide, sodium chloride, sodium carbonate, sulfonic acid, match
It is set to the aqueous solution that viscosity is 3cps, pH value is 7.
S200, the droplet ejection forming of water-soluble core and intermittent infrared ray precuring, by 70/100 mesh silica sand and 100/
140 mesh mullite sand are laid according to 7: 3 ratio on self-powered platform 163 after mixing, and liquid-jet device 122 is real by core
The aqueous solution that the dropping liquid path injection S100 that body Model generates is configured, waits for that the level fine liquid drop spray is completed, opens infrared ray
Heating plate 180 carries out intermittent infrared heating solidification to the layer.After solidification, self-powered platform 163 downlink 0.03mm is complete successively
Dropping liquid process at follow-up discrete level and intermittent infrared ray precuring process, until the hydrojet of all discrete levels and solidification
Process is completed；
S300, infiltration inorganic salt solution, the core after infrared ray precuring is taken out, Na is infiltrated+//Cl-、CO32--H2O bodies
The solution of system at normal temperatures, infiltrating time 10-15s；
S400, intermittent type microwave are heating and curing.Core after infiltration is placed in micro-wave oven 210 and carries out intermittent heating,
It is taken out after solution moisture content testing in core scatters and disappears completely；
S500, it core obtained by microwave curing is placed in sintering furnace 410 is sintered, sintering temperature is burnt at 780 ± 10 DEG C
The knot time is 1-2h.
Certain embodiment of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
Cannot the limitation to the scope of the claims of the present invention therefore be interpreted as；It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect range；Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of additive of water-soluble core, which is characterized in that including following component：Water-soluble high-molecular material, organic acid and
Water-soluble inorganic salt, water-soluble high-molecular material are used to be promoted the initial strength of core, and organic acid prevents corruption for adjusting pH value
Erosion, water-soluble inorganic salt are used for the binder of core.
2. a kind of additive of water-soluble core according to claim 1, which is characterized in that the constituent content is as follows：Water
Soluble macromolecular material 10%-20wt%, organic acid 0-5wt%, water-soluble inorganic salt 75-90wt%.
3. a kind of additive of water-soluble core according to claim 2, it is characterised in that：The water-soluble high-molecular material
For one or more of starch, cellulose, polyethylene glycol, epoxy resin, polyacrylamide etc..
4. a kind of additive of water-soluble core according to claim 2, it is characterised in that：The organic acid is acetic acid, lemon
One or more of lemon acid, oxalic acid, sulfonic acid.
5. a kind of additive of water-soluble core according to claim 2, it is characterised in that：The water-soluble inorganic salt is chlorine
One or more of compound, bromide, carbonate, sulfate, phosphate, nitrate, meta-aluminate, hydroxide, and institute
The cation for stating a variety of water-soluble inorganic salts in additive is the same.
6. a kind of application method of the additive of water-soluble core, it is characterised in that：Using above-mentioned any additive, will add
Agent is mixed with water, is configured to injection liquid, and injection liquid is successively sprayed onto to the discrete level of core, infrared ray while sprinkling
It is heated, generates pre-setting core, pre-setting core is infiltrated or sprayed inorganic salt solution, and the core after infiltration is placed in micro-
It carries out intermittent type microwave in wave stove to be heating and curing, the core after solidification is sintered.
7. a kind of application method of the additive of water-soluble core according to claim 6, which is characterized in that concrete operations walk
It is rapid as follows：
S100, configuration injection liquid, water is uniformly mixed with additive, is configured to the aqueous solution that viscosity is 1-10cps, pH value is 7；
S200, droplet ejection forming and infrared heating are pre- solid, molding sand are laid on self-powered platform 163, liquid-jet device
(122) aqueous solution that the dropping liquid path injection S100 generated by core physical model is configured, waits for that the level fine liquid drop spray is complete
At opening infrared heating plate 180 carries out infrared heating solidification to the layer.After solidification, 163 downlink 0.01 of self-powered platform~
1mm is sequentially completed the dropping liquid process and infrared heating precuring process of follow-up discrete level, until the spray of all discrete levels
Liquid and curing process are completed；
S300, infiltration or spray inorganic salt solution, the core after microwave curing is taken out, infiltration or spray inorganic salt solution, leaching
The bubble time is t1, t1 ＜ 5min；
Core after infiltration is placed in progress intermittent type microwave in micro-wave oven 210 and is heating and curing by S400, intermittent type microwave solidification,
It is taken out after the moisture in core fully scatters and disappears；
Core obtained by microwave curing is placed in sintering furnace 410 and is sintered by S500, sintering, sintering temperature T, T=400-
1000 DEG C, sintering time t2, t2=1-4h.
8. a kind of application method of the additive of water-soluble core according to claim 7, it is characterised in that：In step S200
Molding sand can be one or more of silica sand, mullite sand, zircon sand, magnesia, and the granularity of the molding sand is 70~200 mesh, institute
The inorganic salt solution stated in step S300 is identical as inorganic salt solution in step S100.
9. a kind of application method of the additive of water-soluble core according to claim 8, it is characterised in that：The method is adopted
It is carried out with following device, device includes molding sand spray unit (100), core solidified cell (200), core infusion unit (300)
With core sintering unit (400), the molding sand spray unit (100) includes with liquid storehouse (120), liquid-jet device (122), stone dress
(142) and infrared heating plate (180) are set, are used with liquid storehouse (120) for storing configured injection liquid, laying device (142)
In being laid with molding sand, liquid-jet device (122) is used to so that molding sand aggregation condenses into the molding sand injection injection liquid laid to be solidified
Core (230), infrared heating plate (180) is for treating solidification core (230) pre-add thermal finalization；Core solidified cell (200)
It is solidified into solidification core (320) for treating solidification core (230) progress microwave heating；Core infusion unit (300) is used for
It is impregnated to becoming solidification core (320)；Core sintering unit (400) is for core to be sintered (420) to be sintered.
10. a kind of application method of the additive of water-soluble core according to claim 9, it is characterised in that：The molding sand
Spray unit (100) further includes mixing device (110), material feeding platform (141), self-powered platform (163) and controller (170), institute
The top that material feeding platform (141) is horizontally placed on self-powered platform (163) is stated, and material feeding platform (141) is with self-powered platform (163)
Lifting and move up and down, the controller (170) is used to control the nozzle parameters of liquid-jet device (122), the liquid-jet device
(122) liquid storehouse (120) are matched by woven hose (121) connection, the liquid-jet device (122) is slideably positioned in moving guide rail (131)
On, which is horizontally placed on the top of material feeding platform (141), and liquid-jet device (122) is on moving guide rail (131)
The level sliding injection liquid of material feeding platform (141) injection downwards, is provided between the material feeding platform (141) and moving guide rail (131)
Laying device (142), the laying device (142) are used to be laid with moulding sand mixture to material feeding platform (141).
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Cited By (1)
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|---|---|---|---|---|
| CN113135757A (en) * | 2021-04-29 | 2021-07-20 | 华中科技大学 | Ceramic primary blank forming method based on microwave in-situ sintering and product |
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