CN108500215A - A kind of quick forming method of the water-soluble core of microwave curing - Google Patents
A kind of quick forming method of the water-soluble core of microwave curing Download PDFInfo
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- CN108500215A CN108500215A CN201810409115.4A CN201810409115A CN108500215A CN 108500215 A CN108500215 A CN 108500215A CN 201810409115 A CN201810409115 A CN 201810409115A CN 108500215 A CN108500215 A CN 108500215A
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- 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
- B22C9/105—Salt cores
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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
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Abstract
A kind of quick forming method of the water-soluble core of microwave curing of the present invention, belongs to casting technology field.The method and step of the present invention is S100, liquid is sprayed in configuration；S200, droplet ejection forming；S300, intermittent type microwave solidification；S400, infiltration or spray inorganic salt solution；S500, the solidification of secondary intermittent type microwave；S600, sintering.The present invention by core microwave heating it is preforming after, inorganic salt solution infiltration is carried out to core again, secondary microwave cures and sintering, since the wettability of inorganic salt solution is extremely strong, the hole of filling preform mandrel can fully be soaked, and inorganic salts are precipitated in crystallization in secondary microwave solidification process, significantly improve the intensity of core.
Description
Technical field
The invention belongs to casting technology field, a kind of specifically quick forming method of the water-soluble core of microwave curing.
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 quick forming method of the water-soluble core of microwave curing is provided, it can
The manufacturing cycle for shortening water-soluble core promotes the service life of liquid-jet device.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention is：
The quick forming method of the water-soluble core of a kind of microwave curing of the present invention, which is characterized in that include the following steps：
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, molding sand are laid on self-powered platform, liquid-jet device is generated by core physical model
The aqueous solutions that are configured of dropping liquid path injection S100, wait for that the level fine liquid drop spray is completed, self-powered platform downlink 0.01~
1mm is sequentially completed the dropping liquid process of follow-up discrete level, until the dropping liquid process of all discrete levels is completed；
S300, intermittent type microwave solidification, the core for completing injection forming is taken out together with powder bed, is placed in micro-wave oven and carries out
Intermittent type microwave heats, and is taken out after core is fully cured；
S400, 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；
S500, the solidification of secondary intermittent type microwave, the core after infiltration is placed in micro-wave oven and carries out secondary intermittent type microwave
It is heating and curing, is taken out after the moisture in core fully scatters and disappears；
Secondary microwave solidification gained core is placed in sintering furnace and is sintered by S600, sintering, and sintering temperature is in 400-
1000 DEG C, sintering time 1-4h.
Preferably, the additive of step S100 includes following component：It is water-soluble high-molecular material 10%-20wt%, organic
Sour 0-5wt%, water-soluble inorganic salt 75-90wt%.
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.
Preferably, inorganic salts used are identical as inorganic salts described in step S100 in inorganic salt saturated solution in step S400.
Preferably, the sintering temperature in the step S600 is T, T=590~690 DEG C.
Preferably, water-soluble high-molecular material is in starch, cellulose, polyethylene glycol, epoxy resin, polyacrylamide etc.
One or more；Organic acid is one or more of acetic acid, citric acid, oxalic acid, sulfonic acid；Water-soluble inorganic salt is chlorination
One or more of object, bromide, carbonate, sulfate, phosphate, nitrate, meta-aluminate, hydroxide.
Preferably, the cation of a variety of water-soluble inorganic salts in the additive is the same.
Preferably, the inorganic salt solution in the step S400 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 and laying device, matches liquid storehouse
For storing configured injection liquid, laying device is used to spray spray to the molding sand laid for being laid with molding sand, liquid-jet device
Penetrating liquid makes molding sand aggregation condense into core to be solidified；Core solidified cell carries out microwave heating solidification for treating solidification core
As solidification core；Core infusion unit is used to impregnate to becoming solidification core；Core sintering unit is used for will be to be sintered
Core is 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) quick forming method of the water-soluble core of a kind of microwave curing of the invention, it is right after core microwave heating is preforming
Core carries out inorganic salt solution infiltration, secondary microwave solidification and sintering, since the wettability of inorganic salt solution is extremely strong, Ke Yichong
Share in the benefit it is wet filling preform mandrel hole, and in secondary microwave solidification process crystallization be precipitated inorganic salts, significantly improve type
The intensity of core；
(2) quick forming method of the water-soluble core of a kind of microwave curing of the invention sprays and inorganic salts is added in liquid and have
Machine high molecular material can make water-soluble core obtain higher initial strength；And it is 7 to spray the pH value of liquid by control, is solved
The short problem of liquid-jet device service life；
(3) quick forming method of the water-soluble core of a kind of microwave curing of the invention, will complete the powder bed of print out task into
The whole microwave heating of row, wherein being sprayed with the part of microlayer model thermal post curing, the part for not spraying microlayer model can be to being sprayed with
The part of microlayer model is protected, and avoids the scratch of core in the handling process, and loose condition (of surface) is still kept after microwave heating.
During traditional heating cured coremaking, characteristics of heat transfer is that heat ecto-entad transmits, this makes core outer layer solidification speed
Degree is fast, and 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 quick forming method of the water-soluble core of a kind of microwave curing of the invention, use includes molding sand spraying
Unit, core solidified cell, core infusion unit and core are sintered unit, and core is realized by liquid-jet device and laying device
Quickly manufactured without mould, core solidified cell using microwave heating realize inside and outside heats simultaneously, and intermittent microwave heating side
Formula is conducive to the abundant loss of internal layer moisture, to ensure that the intensity of core.
Description of the drawings
Fig. 1 is a kind of apparatus structure schematic diagram of the quick forming method of the water-soluble core of microwave curing of the present invention；
Fig. 2 is a kind of flow chart of the quick forming method of the water-soluble core of microwave curing of the present invention.
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 quick forming method of the water-soluble core of microwave curing of the present embodiment, includes the following steps：
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, molding sand are laid on self-powered platform 163, liquid-jet device 122 presses core entity mould
The aqueous solution that the dropping liquid path injection S100 that type generates is configured, waits for that the level fine liquid drop spray is completed, under self-powered platform 163
0.01~1mm of row is sequentially completed the dropping liquid process of follow-up discrete level, until the dropping liquid process of all discrete levels is completed；
S300, intermittent type microwave solidification, the core for completing injection forming is taken out together with powder bed 164, is placed in micro-wave oven 210
Middle progress intermittent type microwave heating, takes out after core is fully cured；
S400, 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；
S500, the solidification of secondary intermittent type microwave, the core after infiltration is placed in micro-wave oven 210 and carries out secondary interval and declines
Wave heating cures, and is taken out after the moisture in core fully scatters and disappears；
Secondary microwave solidification gained core is placed in sintering furnace 410 and is sintered by S600, sintering, sintering temperature T, T
=400-1000 DEG C, sintering time t2, t2=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%；Step S200 Sands can be one in silica sand, mullite sand, zircon sand, magnesia
Kind is several, and the granularity of the molding sand is 70~200 mesh；Inorganic salts used and step in inorganic salt saturated solution in step S400
Inorganic salts described in S100 are identical；Sintering temperature in the step S600 is T, T=590~690 DEG C.
Water-soluble high-molecular material is one kind in starch, cellulose, polyethylene glycol, epoxy resin, polyacrylamide etc.
Or it is several；Organic acid is one or more of acetic acid, citric acid, oxalic acid, sulfonic acid；Water-soluble inorganic salt is chloride, bromination
One or more of object, carbonate, sulfate, phosphate, nitrate, meta-aluminate, hydroxide.In the additive
The cation of a variety of water-soluble inorganic salts is the same；Inorganic salt solution in the step S400 and inorganic salt solution in step S100
It is identical.
Water-soluble high-molecular material 10%-20wt%, organic acid 0-5wt%, water-soluble inorganic salt 75-90wt%；It is water-soluble
Property high molecular material be one or more of starch, cellulose, polyethylene glycol, epoxy resin, polyacrylamide etc.；Organic acid
For one or more of acetic acid, citric acid, oxalic acid, sulfonic acid；Water-soluble inorganic salt is chloride, bromide, carbonate, sulfuric acid
One or more of salt, phosphate, nitrate, meta-aluminate, hydroxide.Water-soluble high-molecular material plays guarantee low temperature
The effect of adhesion strength, water-soluble inorganic salt are main binders, ensure that core strength, organic acid play under high temperature degree
Adjust the effect of pH value.Since additive and water are mixed into solution, in subsequent heating process, moisture gradually evaporates, inorganic
The components such as salt and water soluble polymer gradually depend on particle surface crystallization precipitation because of the decline of solubility and form bonded bridge, to
Obtain certain initial strength.Since the solution degree of inorganic salts in water is relatively low, and the amount of solution phase that liquid-jet device 122 sprays
To smaller, therefore, the initial strength individually sprayed obtained by inorganic salt solution is relatively low, and addition water-soluble high-molecular material can be carried significantly
The initial strength of high core.After infiltrated processing, the inorganic salt content in core significantly increases, and can significantly improve the strong of core
Degree.And under high temperature sintering, for water-soluble high-molecular material because of pyrolytic, this can reduce the gas forming amount of core so that core strength
It 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%.
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 infusion unit 300 is used for becoming solid
Change core 320 to be impregnated；Core sintering unit 400 is for core 420 to be sintered to be 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, the data-interface 171 and host computer of controller 170
It is connected, which downloads the discrete obtained discrete level drop of CAD geometry entity model layers for the sand core that host computer generates
The running orbit file of liquid device is moved in the horizontal direction with controlling liquid-jet device 122.The setting of the working chamber 161 is filled in hydrojet
122 lower section is set, self-powered platform 163 is provided in the working chamber 161, the self-powered platform 163 drives with by motor
Piston 162 be connected, piston 162 drives the lower movement in the vertical direction of self-powered 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 is positioned on holder 220, and core 230 to be solidified becomes solid after being fully cured
Change core 320.
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 quick forming method of the water-soluble core of microwave curing of this implementation, operating process are as follows：
S100, configuration injection liquid, are dissolved in water by polyethylene glycol, starch, potassium chloride, potassium hydroxide, oxalic acid, are configured to viscosity
The solution for being 7 for 3-5cps, pH value；
S200, droplet ejection forming, 100/140 mesh mullite is sand flat and is layered on self-powered platform 163, liquid-jet device
The aqueous solution that 122 dropping liquid path injection S100 generated by core physical model are configured, waits for that the level fine liquid drop spray is complete
At, 163 downlink 0.05mm of self-powered platform is sequentially completed the dropping liquid process of follow-up discrete level, until all discrete levels
Dropping liquid process is completed；
S300, intermittent type microwave solidification, the core for completing injection forming is taken out together with cylinder body, is placed in micro-wave oven 210
Intermittent type microwave heating is carried out, core 230 to be solidified takes out after being fully cured；
S400, spray inorganic salt solution, the solidification core 320 after microwave curing are taken out, the saturation for spraying potassium chloride is molten
Liquid, spray time 10-15s.；
Core after infiltration is placed in progress intermittent type microwave in micro-wave oven 210 and added by S500, the solidification of secondary intermittent type microwave
Heat is taken out after solution moisture content testing in core scatters and disappears completely.
Embodiment 3
A kind of quick forming method of the water-soluble core of microwave curing of this implementation, operating process are as follows：
S100, configuration injection liquid, by polyacrylamide, polyethylene glycol is molten, potassium carbonate, potassium chloride citric acid are dissolved in water, matches
It is set to the solution that viscosity is 3-5cps, pH value is 7；
The droplet ejection forming of S200, water-soluble core, the silica sand of 70/100 mesh is mixed with the mullite sand of 100/140 mesh
It is laid on self-powered platform 163 after uniformly, the dropping liquid path injection S100 institutes that liquid-jet device 122 is generated by core physical model
The aqueous solution of configuration waits for that the level fine liquid drop spray is completed, 163 downlink 0.03mm of self-powered platform, is sequentially completed follow-up discrete
The dropping liquid process of level, until the dropping liquid process of all discrete levels is completed；
S300, intermittent type microwave solidification, the core for completing injection forming is taken out together with cylinder body, is placed in micro-wave oven 210
Intermittent type microwave heating is carried out, core 230 to be solidified takes out after being fully cured；
S400, infiltration inorganic salt solution, the solidification core 320 after microwave curing is taken out, K is infiltrated+//Cl-、CO3 2--H2O
The solution of system at normal temperatures, infiltrating time 10-20s；
Core after infiltration is placed in progress intermittent type microwave in micro-wave oven 210 and added by S500, the solidification of secondary intermittent type microwave
Heat is taken out after solution moisture content testing in core scatters and disappears completely.
Embodiment 4
A kind of quick forming method of the water-soluble core of microwave curing of this implementation is united, and operating process is as follows：
S100, configuration injection liquid, are dissolved in water by polyacrylamide, polyethylene glycol, sodium chloride, sodium carbonate, acetic acid, are configured to
The solution that viscosity is 3-5cps, pH value is 7；
The droplet ejection forming of S200, water-soluble core, the silica sand of 70/100 mesh is laid on self-powered platform 163, is sprayed
The aqueous solution that the dropping liquid path injection S100 that liquid device 122 is generated by core physical model is configured, waits for that the level microlayer model sprays
It shoots away into, 163 downlink 0.05mm of self-powered platform, the dropping liquid process of follow-up discrete level is sequentially completed, until all discrete layers
The dropping liquid process in face is completed.
S300, intermittent type microwave solidification, the core for completing injection forming is taken out together with cylinder body, is placed in micro-wave oven 210
Intermittent type microwave heating is carried out, core 230 to be solidified takes out after being fully cured；
S400, infiltration inorganic salt solution, the solidification core 320 after microwave curing is taken out, Na is infiltrated+//Cl-、CO3 2--
H2The solution of O systems at normal temperatures, infiltrating time 10-20s；
Core after infiltration is placed in progress intermittent type microwave in micro-wave oven 210 and added by S500, the solidification of secondary intermittent type microwave
Heat is taken out after solution moisture content testing in core scatters and disappears completely；
S600, it secondary microwave solidification gained core 420 to be sintered is placed in sintering furnace 410 is sintered, sintering temperature
At 750 ± 10 DEG C, sintering time 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 quick forming method of the water-soluble core of microwave curing, which is characterized in that include the following steps：
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, molding sand are laid on self-powered platform (163), liquid-jet device (122) presses core entity mould
The aqueous solution that the dropping liquid path injection S100 that type generates is configured, waits for that the level fine liquid drop spray is completed, self-powered platform (163)
0.01~1mm of downlink is sequentially completed the dropping liquid process of follow-up discrete level, until the dropping liquid process of all discrete levels is completed；
S300, intermittent type microwave solidification, the core for completing injection forming is taken out together with powder bed (164), is placed in micro-wave oven (210)
Middle progress intermittent type microwave heating, takes out after core is fully cured；
S400, 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；
S500, the solidification of secondary intermittent type microwave, the core after infiltration is placed in micro-wave oven (210) and carries out secondary intermittent type microwave
It is heating and curing, is taken out after the moisture in core fully scatters and disappears；
Secondary microwave solidification gained core is placed in sintering furnace (410) and is sintered by S600, sintering, sintering temperature T, T=
400-1000 DEG C, sintering time t2, t2=1-4h.
2. a kind of quick forming method of the water-soluble core of microwave curing according to claim 1, which is characterized in that step
The additive of S100 includes following component：Water-soluble high-molecular material 10%-20wt%, organic acid 0-5wt%, water-soluble inorganic
Salt 75-90wt%.
3. a kind of quick forming method of the water-soluble core of microwave curing according to claim 1, it is characterised in that：Step
S200 Sands can be one or more of silica sand, mullite sand, zircon sand, magnesia, and the granularity of the molding sand is 70~200
Mesh.
4. a kind of quick forming method of the water-soluble core of microwave curing according to claim 1, it is characterised in that：Step
Inorganic salts used are identical as inorganic salts described in step S100 in inorganic salt saturated solution in S400.
5. a kind of quick forming method of the water-soluble core of microwave curing according to claim 1, it is characterised in that：The step
Sintering temperature in rapid S600 is T, T=590~690 DEG C.
6. a kind of quick forming method of the water-soluble core of microwave curing according to claim 2, it is characterised in that：It is water-soluble
High molecular material is one or more of starch, cellulose, polyethylene glycol, epoxy resin, polyacrylamide etc.；Organic acid is
One or more of acetic acid, citric acid, oxalic acid, sulfonic acid；Water-soluble inorganic salt is chloride, bromide, carbonate, sulfuric acid
One or more of salt, phosphate, nitrate, meta-aluminate, hydroxide.
7. a kind of quick forming method of the water-soluble core of microwave curing according to claim 6, it is characterised in that：It is described to add
Add the cation of a variety of water-soluble inorganic salts in agent the same.
8. a kind of quick forming method of the water-soluble core of microwave curing according to claim 6, it is characterised in that：The step
Inorganic salt solution in rapid S400 is identical as inorganic salt solution in step S100.
9. according to a kind of quick forming method of the water-soluble core of microwave curing of claim 1-8 any one of them, feature exists
In：The method is carried out using following device, and device includes molding sand spray unit (100), core solidified cell (200), core
Infusion unit (300) and core sintering unit (400), the molding sand spray unit (100) include being filled with liquid storehouse (120), hydrojet
(122) and laying device (142) are set, with liquid storehouse (120) for storing configured injection liquid, laying device (142) is for spreading
If molding sand, liquid-jet device (122) is used to make molding sand aggregation condense into core to be solidified to the molding sand injection injection liquid laid
(230)；Core solidified cell (200) is solidified into solidification core for treating solidification core (230) progress microwave heating
(320)；Core infusion unit (300) is used to impregnate to becoming solidification core (320)；Core sintering unit (400) is used for
Core to be sintered (420) is sintered.
10. a kind of quick forming method of the water-soluble core of microwave curing according to claim 9, it is characterised in that：It is described
Molding sand spray unit (100) further includes mixing device (110), material feeding platform (141), self-powered platform (163) and controller
(170), the material feeding platform (141) is horizontally placed on the top of self-powered platform (163), and material feeding platform (141) is with lifting work
Make the lifting of platform (163) and move up and down, the controller (170) is used to control the nozzle parameter of liquid-jet device (122), described
Liquid-jet device (122) matches liquid storehouse (120) by woven hose (121) connection, and the liquid-jet device (122) is slideably positioned in movement and leads
On rail (131), which is horizontally placed on the top of material feeding platform (141), and liquid-jet device (122) is in moving guide rail
(131) horizontal sliding material feeding platform (141) injection downwards injection liquid on, between the material feeding platform (141) and moving guide rail (131)
It is provided with laying device (142), which is used to be laid with moulding sand mixture to material feeding platform (141).
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| CN108500215B (en) | 2020-02-07 |
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