CN104493101A - Rapid prototyping system and method for high-precision ester cured water glass sand mold/core - Google Patents
Rapid prototyping system and method for high-precision ester cured water glass sand mold/core Download PDFInfo
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- CN104493101A CN104493101A CN201410817773.9A CN201410817773A CN104493101A CN 104493101 A CN104493101 A CN 104493101A CN 201410817773 A CN201410817773 A CN 201410817773A CN 104493101 A CN104493101 A CN 104493101A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
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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
- B22C1/16—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
- B22C1/186—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 contaming ammonium or metal silicates, silica sols
- B22C1/188—Alkali metal silicates
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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
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Abstract
The invention discloses a rapid prototyping system and method for a high-precision ester cured water glass sand mold/core, and belongs to the technical field of sand mold/core prototyping. The method comprises the following steps: firstly establishing a CAD geometry solid model of the sand mold/core, performing layered discretization, generating a moving trajectory file of each discrete level dripping device and guiding the moving trajectory file of each discrete level dripping device into a controller, and recording the number n of discrete layers; evenly mixing the mold/sand core with water glass by using a mixing device; flatly spreading the mold/core sand wrapped by the water glass on a lifting working platform by a spreading device; and dripping composite organic ester according to the extracted moving trajectory of a first discrete level by the dripping device, after the first discrete level is completed, enabling the lifting working platform to move down, sequentially completing the dripping working procedures of the follow-up discrete levels, curing for 1h to 8h, and taking the mold core out. The rapid prototyping system and method provided by the invention have the advantages of being capable of shortening the manufacturing cycle of the sand mold/core, improving the prototyping precision and performance, increasing the repeated utilization rate of used sand, and reducing the production cost.
Description
Technical field
The present invention relates to sand mold/core field shaping technique, more particularly, relate to a kind of rapid prototyping system and method for high accuracy ester sodified water glass sand mold/core, the method is particularly useful for the rapid shaping of the sand mold/core of organic ester sodified water glass.
Background technology
Water-glass sand be 21 century foundary industry most possibly realize Green foundry produce molding sand.But there is respective deficiency in water-glass sand hardening processes different at present.Such as, it is large to there is energy consumption in Ordinary hardening water-glass sand, and labour intensity is high, and the outer unequal problem of baking degree of sand mold/in-core; CO
2there is collapsibility difference in air blowing hardened sodium silicate sand, regenerating used difficulty, the defects such as hardening process is unstable; It is higher to there is waterglass addition in powder hardened sodium silicate sand, and collapsibility performance is not good, and the deficiency that powder contamination is serious; Traditional microwave heat hardening water-glass sand is then higher to the requirement of mold materials.
Chinese Patent Application No. 99101176.7 discloses a kind of ester solidification sodium silicate sand compound and the transformation hardening method of vacuum, in this application case moulding sand mixture, waterglass addition is 2.0% ~ 5.5% of roughing sand weight, special organic ester addition is 0.1% ~ 2.2% of roughing sand weight, and special organic fast ester addition is roughing sand, waterglass, special organic ester add 0% ~ 50% of total amount.This application case is compared with resin sand foundry goods, and castings production cost reduces about 20%; With CO
2-water-glass sand hardening process is compared, and associating hardening process waterglass addition reduces 40% ~ 60%, and molding sand high-temperature residual strength reduces by 40% ~ 60%.But organic ester residual quantity is high in the reclaimed sand of this application case, and along with the increase of regeneration times, residual organic ester amount increases gradually, causes the up time of soluble glass of high modulus old sand to shorten.Under extreme conditions, the instantaneous hardening one-tenth one of mixed self-hardening sand coils loose sand, does not possess cementitiousness.For ensureing the necessary up time, production can only adopt modulus be less than the waterglass of 2.0.But use pole low modulus water glass, the setting rate of its self-hardening sand is very slow, and this makes the manufacturing cycle of sand mold/core long.
In addition, all indispensable part model of preparation of traditional waterglass sand mold/core and sand mold/core mold, this make new product to manufacture and design the cycle longer, high expensive.Sand mold/core quick molding method eliminates the mould needed for manufacture, and can shorten part manufacture and design the cycle, reduce development cost, be widely used in new product development.
Chinese patent publication No. CN 102343415 B, CN 103567352 A, CN 103551492 A etc. disclose and adopt the laser sintered method preparing sand mold/core.But resin makees sand mold/core prepared by binding agent, and to there is gas forming amount comparatively large, distributes toxic gas, to problems such as environment work the mischief in casting cycle.Chinese patent publication No. CN 104001862 A discloses a kind of rapid forming system and manufacturing process of water-soluble core, this application case adopts nozzle successively to spray inorganic salt solution droplet to the core sand compound completed, and the moisture at a certain temperature in evaporating liquid makes inorganic salts crystallization obtain final inorganic salts core.For the foundry goods with complicated inner cavity or bending duct, the core that this application case prepares is easy to decore, so this application case is mainly used in the preparation of core, but there is sucting wet problem due to inorganic salts binding agent core, cause it and be not suitable for the preparation of sand mold.
Chinese patent publication No. CN 103600039 A and CN 103586410 A discloses molding sand and sprays manufacturing equipment and the method that solidification increases material.First it obtain the aspect details of every layer of casting mold and determine control information, then the molding sand (or chill material) selecting shower nozzle to carry out different materials and order number along current layer scanning pattern according to current layer surface information precisely sprays, and utilizes injection apparatus binding agent and curing agent successively to be sprayed accurately simultaneously.The method can realize the differentiation manufacture of different parts sand mould material, but also there are some problems, as:
1) manufacture realizing binding agent or the higher sand mold of curing agent viscosity is difficult to: the binding agent larger for viscosity or curing agent, after nozzle sprays, because spreading kinetics characteristic is poor, binding agent and curing agent finally concentrate on sand grains top, such sand grains bottom and surrounding lack binding agent or curing agent, between sand grains and sand grains, bonded bridge is less, and shaping sand mold intensity is lower;
2) be difficult to the sand mold of processability marked change in time: for part molding sand, the intensity time marked change of solidification process Sand, as lower in solidification early strength, sharply increase subsequently, after a period of time, intensity starts again to decline.According to injection solidification, material manufacture is increased for this type of molding sand, there is the sand bond of first solidifying and started to decline and the injection molding of sand mold also unclosed problem;
3) be difficult to ensure sand mold precision: because sand grains and iron powder are ejected into workbench by nozzle, sand grains falls work top in freely falling body mode, finally forms continuous print " small mountain ", and therefore, the thickness and precision successively manufactured is not high.
Summary of the invention
1. invent the technical problem that will solve
The object of the invention is to solve following problem: 1) existing waterglass sand mold/core need adopt mould molding, and ester sodified water glass sand increases along with recovered frequency, old sand recovery difficult is large; 2) it is not high that existing sand mold/core injection solidification increases the material manufacture method accuracy of manufacture; 3) for the preparation poor effect of the sand mold/core of binding agent or the higher sand mold/core of curing agent viscosity, performance marked change in time; Provide a kind of rapid prototyping system and method for high accuracy ester sodified water glass sand mold/core.Adopt technical scheme provided by the invention, the manufacturing cycle of sand mold/core can be shortened, improve its formed precision and performance, old sand recycling rate of waterused can also be improved, reduce production cost.
2. technical scheme
For achieving the above object, technical scheme provided by the invention is:
The quick molding method of a kind of high accuracy ester sodified water glass sand mold/core of the present invention, the steps include:
Step one, set up the CAD geometry entity model of sand mold/core, and it is discrete to carry out layering, generates the running orbit file of each discrete aspect dropper, and this running orbit file is imported by data-interface in the controller of dropper, record discrete layer number of plies n;
Step 2, with mixing device, type/core sand to be mixed with waterglass;
Step 3, with laying device, the type/core sand of coated for step 2 waterglass is laid in self-powered platform;
Step 4, dropper to drip compound organic ester according to the discrete aspect running orbit of ground floor extracted, after the discrete aspect of ground floor completes, descending 0.1mm ~ the 1mm of self-powered platform, completes the dropping liquid operation of follow-up discrete aspect successively, until the dropping liquid operation of all discrete aspects completes;
After step 5, step 4 operation complete, treat sand mold/core solidification 1h-8h, take out core.
Further, compound organic ester described in step 4 comprises fast ester and slow ester, described fast ester is the mixture of monoacetin, ethylene glycol monoacetate, propylene carbonate, diglycol monotertiary acetate or four any combination, and described slow ester is diethylene glycol acetate, glyceryl diacetate or both mixtures.
Further, in the compound organic ester that the i-th layer scattering aspect drips, the proportionate relationship of slow ester s and fast ester f is: s/ (s+f)=(i-1)/(n-1).
Further, described compound organic ester addition is 1% ~ 2% of molding sand total amount.
Further, step 2 modulus of water glass used is 1.5 ~ 2.5.
Further, in step 2, type/core sand used is the mixture of quartz sand, mullite sand, olivine sand or three's any combination, and the granularity of above-mentioned type/core sand is 70/140 order.
The rapid prototyping system of a kind of high accuracy ester sodified water glass sand mold/core of the present invention, comprise casing, mixing device, dosing storehouse, dropper, laying device, self-powered platform and controller, described mixing device, dosing storehouse are arranged at two upper lateral parts in casing respectively, the bottom of mixing device is provided with discharging opening, the below of this discharging opening is provided with material feeding platform, and described laying device is arranged between material feeding platform and discharging opening; Described dosing storehouse is connected with dropper by woven hose, this dropper carry is on moving guide rail, dropper is controlled by the controller along moving guide rail and slides, and described moving guide rail is connected with fixed guide, and this moving guide rail is also controlled by the controller along fixed guide and slides; The two ends of described fixed guide are separately fixed at the front and back inwall of casing; Described working chamber is arranged on the below of dropper, is provided with self-powered platform in this working chamber, and described self-powered platform is connected with by motor-driven piston.
3. beneficial effect
Adopt technical scheme provided by the invention, compared with existing known technology, there is following remarkable result:
(1) quick molding method of a kind of high accuracy ester sodified water glass sand mold/core of the present invention, first type/core sand mixes with waterglass by it, avoid because waterglass viscosity is higher, after droplet ejection, the problem of poor effect sprawled by waterglass at sand grain surface, improve sand mold/core performance, adopt laying device successively to be spread out on self-powered platform by mixing rear profile/core sand, thickness is controlled, solves traditional/core sand and causes from shower nozzle ejection the problem that sand mold precision is not high;
(2) quick molding method of a kind of high accuracy ester sodified water glass sand mold/core of the present invention, it successively drips the compound organic ester of different component proportioning, namely first moulding section solidifies with slow ester, aftershaping part is solidified with fast ester, both solve the problem that same component organic ester curing agent changes with hardening time because of sand mold/core strength character of causing of molding time difference, shorten again sand mold/core manufacturing cycle;
(3) quick molding method of a kind of high accuracy ester sodified water glass sand mold/core of the present invention, adopt low modulus water glass as binding agent, avoid the problem that organic ester sodified water glass sand up time in old sand repeated regeneration process reduces gradually, improve old sand repeat usage, reduce production cost; And compound organic ester is hydrolyzed and obtains organic acid and alcohol under the weak basic condition of low modulus water glass, and then react with waterglass and impel waterglass dehydration to harden, whole forming process, without the need to heating, therefore effectively reduces power consumption of polymer processing.
Accompanying drawing explanation
Fig. 1 is the flow chart of the quick molding method of a kind of high accuracy ester sodified water glass sand mold/core of the present invention;
Fig. 2 is the structural representation of the rapid prototyping system of a kind of high accuracy ester sodified water glass sand mold/core of the present invention.
Label declaration in schematic diagram:
1, casing; 2, mixing device; 21, discharging opening; 31, dosing storehouse; 32, woven hose; 33, dropper; 41, moving guide rail; 42, fixed guide; 51, material feeding platform; 52, laying device; 61, molded discrete layer; 62, mixed material; 71, working chamber; 72, piston; 73, self-powered platform; 8, controller; 81, data-interface.
Detailed description of the invention
For understanding content of the present invention further, below in conjunction with embodiment, the invention will be further described.
Embodiment 1
Referring to Fig. 2, the rapid prototyping system of a kind of high accuracy ester sodified water glass sand mold/core of the present embodiment, comprises casing 1, mixing device 2, dosing storehouse 31, dropper 33, laying device 52, self-powered platform 73 and controller 8.Described mixing device 2, dosing storehouse 31 are arranged at two upper lateral parts in casing 1 respectively, and wherein, mixing device 2 is equipped with type/core sand and waterglass, and this mixing device 2 is for fully mixing type/core sand and waterglass.The bottom of mixing device 2 is provided with discharging opening 21, and the below of this discharging opening 21 is provided with material feeding platform 51, and the mixed material 62 mixed is fallen material feeding platform 51 from discharging opening 21.Laying device 52 is positioned at the below of discharging opening 21, the top of material feeding platform 51, is driven do horizontal movement by motor.The mixed material 62 fallen on material feeding platform 51 is laid on self-powered platform 73 by laying device 52, and laying device 52 often moves an i.e. stone one deck on molded discrete layer 61 back and forth.Described dosing storehouse 31 is connected with dropper 33 by woven hose 32, this dropper 33 carry is on moving guide rail 41, the controlled device 8 of dropper 33 controls to slide along moving guide rail 41, described moving guide rail 41 is connected with fixed guide 42, moving guide rail 41 is mutually vertical with fixed guide 42, this moving guide rail 41 also controlled device 8 controls to slide along fixed guide 42, the data-interface 81 of controller 8 is connected with host computer, the running orbit file that the discrete discrete aspect dropper obtained of CAD geometry entity model layers of sand mold/core that host computer generates downloaded by this controller 8 moves in the horizontal direction to control dropper 33, the two ends of fixed guide 42 are separately fixed at the front and back inwall of casing 1.Described working chamber 71 is arranged on the below of dropper 33, is provided with self-powered platform 73 in this working chamber 71, and described self-powered platform 73 is connected with by motor-driven piston 72, and piston 72 moves under driving self-powered platform 73 in the vertical direction.Simple, the reasonable in design and low cost of manufacture of the rapid prototyping system structure of the present embodiment, easy to utilize.
Referring to Fig. 1, utilize above-mentioned rapid prototyping system, the quick molding method of the high accuracy ester sodified water glass sand mold/core of the present embodiment, detailed process is:
(1) the CAD geometry entity model of sand mold/core is set up, and it is discrete to carry out layering, generate the running orbit file of each discrete aspect dropper 33, and this running orbit file is imported in the controller 8 of dropper 33 by data-interface 81, record discrete layer number of plies n.
(2) waterglass being 1.5 by 100 part of 70/140 order quartz sand and 3 parts of moduluses mixes in mixing device 2, type/core sand first mixes with waterglass by the present embodiment, avoid because waterglass viscosity is higher, after droplet ejection, the problem of poor effect sprawled by waterglass at sand grain surface, is convenient to improve sand mold/core performance.
(3) with laying device 52, the mixed material 62 of the coated waterglass mixed is laid on self-powered platform 73, the present embodiment adopts laying device 52 successively to be spread out on self-powered platform 73 by mixing rear profile/core sand, thickness is controlled, solves traditional/core sand and causes from shower nozzle ejection the problem that sand mold precision is not high.
(4) to be dripped the compound organic ester that diethylene glycol acetate and diglycol monotertiary acetate form according to the discrete aspect running orbit of ground floor that host computer generates by dropper 33, compound organic ester total amount is 1% of molding sand, the drop velocity of dropper 33 is 150/min, its nozzle rate travel is 0.8mm/s, and diethylene glycol acetate in ground floor compound organic ester/(diethylene glycol acetate+diglycol monotertiary acetate) is 0%; After the discrete aspect of ground floor completes, the descending certain operating distance of lifting platform, operating distance length is 0.1mm, complete the dropping liquid operation of follow-up discrete aspect successively, and i-th layer to drip diethylene glycol acetate in compound organic ester/(diethylene glycol acetate+diglycol monotertiary acetate) be (i-1)/(n-1), until the dropping liquid operation of all discrete aspects completes.
(5) after dropping liquid operation completes, treat sand mold/core solidification 2h, taking out sand mold/core can use.
What deserves to be explained is, the present embodiment adopts modulus to be that the low modulus water glass of 1.5 is as binding agent, the problem that organic ester sodified water glass sand up time in old sand repeated regeneration process reduces gradually can be avoided, improve old sand repeat usage, reduce production cost.And about use low modulus water glass, the problem that sand mold/core setting rate is slow, inventor points out: because the present embodiment successively drips the compound organic ester of different component proportioning, for first shaping part, mainly solidifies with slow ester, waterglass contacts with slow ester and starts curing reaction, the present embodiment is compared to general forming method, lower to the requirement of setting rate, therefore, the problem that low modulus water glass setting rate is slow need not be considered, have the sufficiently long time allow sand mold/core completion of cure; And for the part of aftershaping, the present embodiment considers the time difference (bottom required time the longest, the superiors' shortest time) needed for the solidification of each discrete layer, by the ratio of fast ester in the organic ester that controls the instillation of each discrete layer, progressively increase its curing rate, reach each discrete layer solidification starting point different, but arrive the object that the end time of final strength is close, both solve the problem that same component organic ester curing agent changes with hardening time because of sand mold/core strength character of causing of molding time difference, shorten again sand mold/core manufacturing cycle.Compound organic ester is hydrolyzed and obtains organic acid and alcohol by the present embodiment under the weak basic condition of low modulus water glass, and then to react with waterglass and impel waterglass dehydration to harden, and by the control to drop velocity, nozzle rate travel, make whole forming process without the need to heating, effectively reduce power consumption of polymer processing.
Embodiment 2
The rapid prototyping system of a kind of high accuracy ester sodified water glass sand mold/core of the present embodiment, substantially with embodiment 1, is now summarized as follows its forming process:
(1) set up the CAD geometry entity model of sand mold/core, and it is discrete to carry out layering, generates the running orbit file of each discrete aspect dropper, and imported by data-interface in the controller of dropper, record discrete layer number of plies n.
(2) waterglass being 2.5 by 80 part of 70/140 order mullite sand and 5 parts of moduluses mixes in mixing device.
(3) with laying device, the type/core sand of mixed coated waterglass is laid in self-powered platform.
(4) dripped according to the discrete aspect running orbit of ground floor that host computer generates by dropper the compound organic ester of glyceryl diacetate and monoacetin, compound organic ester total amount is 2% of molding sand, the drop velocity of dropper 33 is 200/min, its nozzle rate travel is 1.2mm/s, and glyceryl diacetate in ground floor compound organic ester/(glyceryl diacetate+monoacetin) is 0%; After the first discrete aspect completes, the descending certain operating distance of self-powered platform, operating distance length is at 0.5mm, complete the dropping liquid operation of follow-up discrete aspect successively, and i-th layer to drip glyceryl diacetate in compound organic ester/(glyceryl diacetate+monoacetin) be (i-1)/(n-1), until the dropping liquid operation of all discrete aspects completes.
(5) after dropping liquid operation completes, treat sand mold/core solidification 8h, taking out sand mold/core can use.
Embodiment 3
The rapid prototyping system of a kind of high accuracy ester sodified water glass sand mold/core of the present embodiment, substantially with embodiment 1, is now summarized as follows its forming process:
(1) set up the CAD geometry entity model of sand mold/core, and it is discrete to carry out layering, generates the running orbit file of each discrete aspect dropper, and imported by data-interface in the controller of dropper, record discrete layer number of plies n.
(2) waterglass being 1.8 by 120 point of 70/140 order olivine sand and 4 parts of moduluses mixes in mixing device.
(3) with laying device by mixed coated waterglass type/core sand be laid in self-powered platform.
(4) to be dripped the compound organic ester that diethylene glycol acetate, monoacetin and ethylene glycol monoacetate mix according to the discrete aspect running orbit of ground floor that host computer generates by dropper, compound organic ester total amount is 1.5% of molding sand, the drop velocity of dropper 33 is 300/min, its nozzle rate travel is 2mm/s, and diethylene glycol acetate in ground floor compound organic ester/(diethylene glycol acetate+monoacetin+ethylene glycol monoacetate) is 0%; After the first discrete aspect completes, the descending certain operating distance of self-powered platform, operating distance length is at 0.1mm, complete the dropping liquid operation of follow-up discrete aspect successively, and i-th layer to drip diethylene glycol acetate in compound organic ester/(diethylene glycol acetate+monoacetin+ethylene glycol monoacetate) be (i-1)/(n-1), until the dropping liquid operation of all discrete aspects completes.
(5) after dropping liquid operation completes, treat sand mold/core solidification 6h, taking out sand mold/core can use.
Embodiment 4
The rapid prototyping system of a kind of high accuracy ester sodified water glass sand mold/core of the present embodiment, substantially with embodiment 1, is now summarized as follows its forming process:
(1) set up the CAD geometry entity model of sand mold/core, and it is discrete to carry out layering, generates the running orbit file of each discrete aspect dropper, and imported by data-interface in the controller of dropper, record discrete layer number of plies n.
(2) waterglass being 1.6 by the mixed sand (olivine sand 30 parts, 60 parts, mullite sand) of 90 point of 70/140 order olivine sand and mullite sand and 3 parts of moduluses mixes in mixing device.
(3) with laying device by mixed coated waterglass type/core sand be laid in self-powered platform.
(4) to be dripped the compound organic ester that diethylene glycol acetate, glyceryl diacetate, monoacetin, ethylene glycol monoacetate and propylene carbonate mix according to the discrete aspect running orbit of ground floor that host computer generates by dropper, compound organic ester total amount is 1.5% of molding sand, the drop velocity of dropper 33 is 30/min, its nozzle rate travel is 0.2mm/s, and in ground floor compound organic ester, (diethylene glycol acetate+glyceryl diacetate)/compound organic ester is 0%; After the first discrete aspect completes, the descending certain operating distance of self-powered platform, operating distance length is at 0.1mm, complete the dropping liquid operation of follow-up discrete aspect successively, and i-th layer to drip (diethylene glycol acetate+glyceryl diacetate)/compound organic ester in compound organic ester be (i-1)/(n-1), until the dropping liquid operation of all discrete aspects completes.
(5) after dropping liquid operation completes, treat sand mold/core solidification 4h, taking out sand mold/core can use.
The rapid prototyping system of a kind of high accuracy ester sodified water glass sand mold/core described in embodiment 1 ~ 4 and method, dropper 33 is adopted successively to drip the shaping sand mold/core of compound organic ester of different ratio, avoid sand mold/core manufacture need mould and cause the deficiency that product development cost is too high, the construction cycle is long, shorten the manufacturing cycle of sand mold/core, improve formed precision and the performance of sand mold/core, old sand recycling rate of waterused can also be improved, reduce production cost, easy to utilize.
Claims (7)
1. a quick molding method for high accuracy ester sodified water glass sand mold/core, the steps include:
Step one, set up the CAD geometry entity model of sand mold/core, and it is discrete to carry out layering, generates the running orbit file of each discrete aspect dropper, and this running orbit file is imported by data-interface in the controller of dropper, record discrete layer number of plies n;
Step 2, with mixing device, type/core sand to be mixed with waterglass;
Step 3, with laying device, the type/core sand of coated for step 2 waterglass is laid in self-powered platform;
Step 4, dropper to drip compound organic ester according to the discrete aspect running orbit of ground floor extracted, after the discrete aspect of ground floor completes, descending 0.1mm ~ the 1mm of self-powered platform, completes the dropping liquid operation of follow-up discrete aspect successively, until the dropping liquid operation of all discrete aspects completes;
After step 5, step 4 operation complete, treat sand mold/core solidification 1h-8h, take out core.
2. the quick molding method of a kind of high accuracy ester sodified water glass sand mold/core according to claim 1, it is characterized in that: the compound organic ester described in step 4 comprises fast ester and slow ester, described fast ester is the mixture of monoacetin, ethylene glycol monoacetate, propylene carbonate, diglycol monotertiary acetate or four any combination, and described slow ester is diethylene glycol acetate, glyceryl diacetate or both mixtures.
3. the quick molding method of a kind of high accuracy ester sodified water glass sand mold/core according to claim 2, is characterized in that: in the compound organic ester that the i-th layer scattering aspect drips, the proportionate relationship of slow ester s and fast ester f is: s/ (s+f)=(i-1)/(n-1).
4. the quick molding method of a kind of high accuracy ester sodified water glass sand mold/core according to Claims 2 or 3, is characterized in that: described compound organic ester addition is 1% ~ 2% of molding sand total amount.
5. the quick molding method of a kind of high accuracy ester sodified water glass sand mold/core according to claim 4, is characterized in that: step 2 modulus of water glass used is 1.5 ~ 2.5.
6. the quick molding method of a kind of high accuracy ester sodified water glass sand mold/core according to claim 5, it is characterized in that: in step 2, type/core sand used is the mixture of quartz sand, mullite sand, olivine sand or three's any combination, and the granularity of above-mentioned type/core sand is 70/140 order.
7. the rapid prototyping system of high accuracy ester sodified water glass sand mold/core, it is characterized in that: comprise casing (1), mixing device (2), dosing storehouse (31), dropper (33), laying device (52), self-powered platform (73) and controller (8), described mixing device (2), dosing storehouse (31) is arranged at two upper lateral parts in casing (1) respectively, the bottom of mixing device (2) is provided with discharging opening (21), the below of this discharging opening (21) is provided with material feeding platform (51), described laying device (52) is arranged between material feeding platform (51) and discharging opening (21), described dosing storehouse (31) is connected with dropper (33) by woven hose (32), this dropper (33) carry is on moving guide rail (41), dropper (33) controlled device (8) controls to slide along moving guide rail (41), described moving guide rail (41) is connected with fixed guide (42), and this moving guide rail (41) also controlled device (8) controls to slide along fixed guide (42), the two ends of described fixed guide (42) are separately fixed at the front and back inwall of casing (1), described working chamber (71) is arranged on the below of dropper (33), be provided with self-powered platform (73) in this working chamber (71), described self-powered platform (73) is connected with by motor-driven piston (72).
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| CN105562623A (en) * | 2015-12-31 | 2016-05-11 | 华中科技大学 | Rapid molding method of sodium silicate sand mould |
| CN109108212A (en) * | 2018-10-10 | 2019-01-01 | 内蒙古第机械集团股份有限公司 | A kind of environmental protection casting modified organic ester and preparation method |
| JP2020506061A (en) * | 2017-02-04 | 2020-02-27 | 済南聖泉集団股▲ふん▼有限公司 | Hardener for casting water glass |
| CN111660402A (en) * | 2019-03-06 | 2020-09-15 | 新东工业株式会社 | Additive manufacturing system and container |
| WO2021209423A1 (en) * | 2020-04-15 | 2021-10-21 | Peak Deutschland Gmbh | Method using an inorganic binder for producing cured three-dimensionally layered shaped bodies for foundry cores and moulds |
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| US5257657A (en) * | 1990-07-11 | 1993-11-02 | Incre, Inc. | Method for producing a free-form solid-phase object from a material in the liquid phase |
| US5860575A (en) * | 1996-09-30 | 1999-01-19 | Akin; James Sherill | Stability enhancement of molten solder droplets as ejected from a nozzle of droplet pump |
| CN101439389A (en) * | 2007-11-19 | 2009-05-27 | 上海重型机器冶铸厂 | Method for molding cast steel, method for recycling and regenerating fresh sand and mould sand, and reclaimed sand |
| CN102397991A (en) * | 2011-11-25 | 2012-04-04 | 中国一拖集团有限公司 | Quick manufacturing method for die-free casting sand mold |
| CN104001862A (en) * | 2014-06-16 | 2014-08-27 | 安徽工业大学 | System and method for rapidly forming water-soluble core |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105562623A (en) * | 2015-12-31 | 2016-05-11 | 华中科技大学 | Rapid molding method of sodium silicate sand mould |
| CN105562623B (en) * | 2015-12-31 | 2017-10-24 | 华中科技大学 | A kind of waterglass sand mold quick forming method |
| JP2020506061A (en) * | 2017-02-04 | 2020-02-27 | 済南聖泉集団股▲ふん▼有限公司 | Hardener for casting water glass |
| CN109108212A (en) * | 2018-10-10 | 2019-01-01 | 内蒙古第机械集团股份有限公司 | A kind of environmental protection casting modified organic ester and preparation method |
| CN111660402A (en) * | 2019-03-06 | 2020-09-15 | 新东工业株式会社 | Additive manufacturing system and container |
| US11504908B2 (en) | 2019-03-06 | 2022-11-22 | Sintokogio, Ltd. | Additive manufacturing system and container |
| WO2021209423A1 (en) * | 2020-04-15 | 2021-10-21 | Peak Deutschland Gmbh | Method using an inorganic binder for producing cured three-dimensionally layered shaped bodies for foundry cores and moulds |
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