CN1524644B - Water-soluble casting mold and method for manufacturing the same - Google Patents
Water-soluble casting mold and method for manufacturing the same Download PDFInfo
- Publication number
- CN1524644B CN1524644B CN2004100068956A CN200410006895A CN1524644B CN 1524644 B CN1524644 B CN 1524644B CN 2004100068956 A CN2004100068956 A CN 2004100068956A CN 200410006895 A CN200410006895 A CN 200410006895A CN 1524644 B CN1524644 B CN 1524644B
- Authority
- CN
- China
- Prior art keywords
- hydrates
- water
- magnesium sulfate
- mold
- foundry goods
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
- B22C15/23—Compacting by gas pressure or vacuum
- B22C15/24—Compacting by gas pressure or vacuum involving blowing devices in which the mould material is supplied in the form of loose particles
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
In a water-soluble casting mold according to the present invention, after casting sand is obtained by adding a water-soluble binder containing an inorganic sulfate compound such as magnesium sulfate or the like easily solved in water and water to a refractory granular material for casting sand, the casting sand is dried by microwave radiation or the like in such a manner that the inorganic sulfate compound in the binder is kept retaining at least a portion of crystal water and accordingly, since the inorganic sulfate compound exists in hydrate state in the mold, the mold after drying is provided with good water-solubility and a sufficiently high strength as well, thereby it is possible to recover easily and use repeatedly the binder.
Description
Technical field
The present invention relates to water-soluble casting with mold and manufacture method thereof, to relate in particular to binding agent be water-soluble, reusable and can guarantee the technology of enough mold strength.
Background technology
Making casting when use mold, extensively adopt to make binding agent coat the technology of the fire resistance shot-like particle of casting usefulness such as silica sand, but the binding agent of use this moment can roughly be divided into organic binder bond and inorganic binder.But organic binder bond generally begins to decompose at about 400 ℃, thereby can't reclaim and reuse, and binding agent is reclaimed and reusable occasion is used inorganic binder mostly at needs.In this inorganic binder, especially as use sulphate soluble in water such as magnesium sulfate, be immersed in to mold cast back as long as with mold and just can easily make mold defeated and dispersed in the water, the recovery of binding agent is also very easy.
But in the casting of the aluminium alloy casting things such as cylinder cover of engine for automobile, pouring temperature reaches about 770 ℃.Therefore; the fusing point of inorganic sulfur acid compound of binding agent of mold that is used for the aluminium alloy casting thing is in case lower than 770 ℃; inorganic sulfur acid compound fusion when then pouring into a mould and vitreous can't be reclaimed binding agent after the cast, thereby need to use fusing point at the inorganic sulfur acid compound more than 770 ℃.Here,, magnesium sulfate is for example arranged as such inorganic compound, and the existing various in the past motion that this magnesium sulfate is used for casting the technology of using mold.
For example, disclosed in the patent documentation 1 (Japan Patent special public clear 46-4818 communique 1-2 page or leaf) magnesium sulfate itself has been carried out moulding as aggregate, the technology of using as the water-soluble casting core of Hpdc.In addition, disclosed following technology in the patent documentation 2 (the Japan Patent spy opens clear 53-119724 communique 1-2 page or leaf), promptly, the fire resistance shot-like particle that foundry goods sand is used uses the magnesium sulfate as binding agent, will the fire resistance shot-like particle, magnesium sulfate and water mixes the back and forcibly carry out drying and obtain mold under 200 ℃～300 ℃ temperature.And, at patent documentation 3 (Japanese patent laid-open 11-285777 communique, 3-4 page or leaf, disclosed Fig. 3), use calcium sulfate and magnesium sulfate as binding agent, fire resistance shot-like particles such as this binding agent and silica sand are mixed the back descended drying 4 hours, thereby obtain the technology of mold at 350 ℃.
But, in the mold of record, magnesium sulfate itself carries out moulding as aggregate, thereby the mold that obtains does not have aeration in above-mentioned patent documentation 1, the gas of generation such as casting metals can not be discharged fully from mold during cast, is easy to generate defective in the foundry goods after the casting.In addition, in the mold of in patent documentation 2, putting down in writing, fire resistance shot-like particle, magnesium sulfate and water are mixed the back under 200 ℃～300 ℃ temperature, forcibly carry out drying, but magnesium sulfate hydrate can dewater under the temperature more than 200 ℃, thereby can think that the magnesium sulfate in the mold has become no hydrate.But, magnesium sulfate is under the state of no hydrate, with the state of the hydrate that comprises the crystallization water mutually specific strength reduce greatly, thereby in order fully to guarantee the intensity of mold, have to increase the addition of magnesium sulfate, being very disadvantageous aspect the recovery of the mouldability of mold, dry easiness or binding agent, cause operating efficiency to descend.
And, in the mold of patent documentation 3 record, dryly under 350 ℃ hot conditions, to carry out, the bending strength of the testpieces of the occasion that magnesium sulfate is used as binding agent separately is 0.04kg/mm
2, this value is extremely low, thus, also can think identical with above-mentioned patent documentation 2, the no hydrate of magnesium sulfate dehydration having become in the mold.Thereby, in order fully to guarantee the intensity of mold, must increase the addition of magnesium sulfate quite a lot ofly.And calcium sulfate just in 42 ℃ of following 0.210g/100g extremely low value like this, is difficult to practicality as water-soluble mold with respect to the solubility maximum of water.
Summary of the invention
The objective of the invention is to, utilize binding agent, make the recovery of binding agent easy, can reuse binding agent efficiently, fully guarantee mold strength etc. with an amount of binding agent based on water-soluble sulphate.
The water-soluble casting mold of technical scheme 1, its characteristics are, comprising: the fire resistance shot-like particle that foundry goods sand is used; The water-soluble binder that comprises at least a kind of inorganic sulfur acid compound in magnesium sulfate, aluminum sulfate, sodium sulphate, nickelous sulfate, the manganese sulfate, the inorganic sulfur acid compound contains the crystallization water under drying regime.
The magnesium sulfate of the inorganic sulfur acid compound that contains in the binding agent as this mold, aluminum sulfate, sodium sulphate, nickelous sulfate, manganese sulfate are all to the favorable solubility of water.Therefore, even the occasion that the casting core that will utilize mold that this binding agent obtains to use as the foundry goods with complicated shape uses just can easily make mold defeated and dispersed as long as mold is immersed in the water, thereby recyclable binding agent can also make the binding agent repeated use.And the fusing point of these inorganic sulfur acid compounds is all more than 770 ℃.Therefore, for example, even use the occasion of this mold in the casting of aluminium alloy castingses such as part at automobile, the pouring temperature of aluminium alloy castings is generally about 770 ℃, thereby sulphate can fusion and binding agent can be easily reclaimed in vitreous.
But, in general, the inorganic sulfur acid compound has, under the state of the hydrate that contains the crystallization water than the state of the no hydrate that does not contain the crystallization water under the big character of intensity, but this water-soluble casting mold, the inorganic sulfur acid compound of binding agent contains the crystallization water under drying regime, thereby the intensity of mold is very high.In addition, binding agent is not only limited in the above-mentioned multiple inorganic sulfur acid compound a kind.Each inorganic sulfur acid compound can be brought into play the intensity of maximum under the state of hydrate of regulation, but because of moisture absorption deterioration etc. changes the amount of the crystallization water that contains, the intensity of inorganic sulfur acid compound will descend.The crystallization water of inorganic sulfur acid compound might not evaporate in foundry goods sand equably when in addition, foundry goods sand was dry.For this reason, multiple inorganic sulfur acid compound ratio is in accordance with regulations mixed, when foundry goods sand is dry as mixed crystal, the peak value that makes binding agent and occur with respect to the intensity of the amount of the crystallization water that contains slows down, thereby, even the amount of the crystallization water changes or in the amount occasion devious of mold intercrystalline water, also can fully guarantee the mold integral intensity.
The water-soluble casting mold of technical scheme 2 has foundry goods sand fire resistance shot-like particle 100 weight portions that use and the binding agent that contains magnesium sulfate 0.5～10.0 weight portion that is equivalent to 7 hydrates, and under drying regime, magnesium sulfate has the advantages that to contain the crystallization water.Magnesium sulfate just can make mold defeated and dispersed as long as the cast back adds water, thereby reclaim binding agent easily with respect to the favorable solubility of water.And the fusing point of magnesium sulfate is 1185 ℃, and uses the occasion of this mold in the casting of aluminium alloy castingses such as part at automobile, and the pouring temperature of aluminium alloy castings is generally about 770 ℃, thereby magnesium sulfate can fusion and binding agent can be easily reclaimed in vitreous.
And binding agent comprises magnesium sulfate 0.5～10.0 weight portion, thereby can guarantee enough mold strength with the magnesium sulfate of the amount of appropriateness.Promptly, as the amount of magnesium sulfate less than 0.5 weight portion, then mold can not obtain enough intensity, on the other hand, the amount of magnesium sulfate surpasses 10.0 weight portions, when then the interpolation binding agent mixes in the fire resistance shot-like particle that foundry goods sand is used, must interpolation be used to dissolve the water of magnesium sulfate in a large number, make for foundry goods sand is carried out moulding the filling variation when foundry goods sand carried out filling in mould, a large amount of aqueous vaporization and produce the hole in mold in the foundry goods sand when foundry goods sand after the moulding is carried out drying causes mold strength to descend.
The water-soluble casting mold of technical scheme 3, its characteristics be, on the basis of the invention of technical scheme 2, under drying regime, magnesium sulfate contains the crystallization water that is equivalent to 1～5 hydrate.Magnesium sulfate is bigger than intensity under the no hydrate state under the hydrate state, thereby by making the magnesium sulfate in the drying regime bottom mold become the structure that contains the crystallization water that is equivalent to 1～5 hydrate, thereby can fully guarantee mold strength.And magnesium sulfate has the highest intensity under the state of 3～4 hydrates, thereby the magnesium sulfate in the drying regime bottom mold preferably contains the crystallization water that is equivalent to 3～4 hydrates.
The water-soluble casting mold of technical scheme 4, its characteristics are, on the basis of the invention of technical scheme 1, described binding agent is at least a kind in sodium dihydrogen phosphate and the potassium dihydrogen phosphate to be cooperated with described inorganic sulfur acid compound with the ratio below the 75 weight % form.During cast, the part of mold becomes high temperature partly, and the crystallization water of inorganic sulfur acid compound separates evaporation and dewaters, and the inorganic sulfur acid compound becomes no hydrate, and intensity descends.For this reason, by at least a kind in sodium dihydrogen phosphate and the potassium dihydrogen phosphate is cooperated with the inorganic sulfur acid compound with the ratio below the 75 weight %, so guaranteeing that the water miscible while of mold can improve hear resistance.
The water-soluble casting mold of technical scheme 5, its characteristics are, on the basis of the invention of technical scheme 1, described binding agent is at least a kind in tricalcium phosphate, aluminum phosphate, tertiary sodium phosphate, diphosphate sodium, sodium hydrogen phosphate 12 hydrates to be cooperated with described inorganic sulfur acid compound with the ratio below the 50 weight % form.During cast, the part of mold becomes high temperature partly, and the crystallization water of inorganic sulfur acid compound separates evaporation and dewaters, and the inorganic sulfur acid compound becomes no hydrate, and intensity descends.For this reason, by at least a kind in tricalcium phosphate, aluminum phosphate, tertiary sodium phosphate, diphosphate sodium, sodium hydrogen phosphate 12 hydrates is cooperated with the inorganic sulfur acid compound with the ratio below the 50 weight %, so guaranteeing that the water miscible while of mold can improve hear resistance.
The water-soluble casting mold of technical scheme 6, its characteristics be, on the basis of the invention of technical scheme 1, described binding agent is magnesium chloride to be cooperated with described inorganic sulfur acid compound with the ratio below the 75 weight % form.During cast, the part of mold becomes high temperature partly, and the crystallization water of inorganic sulfur acid compound separates evaporation and dewaters, and the inorganic sulfur acid compound becomes no hydrate, and intensity descends.For this reason, by magnesium chloride is cooperated with the inorganic sulfur acid compound with the ratio below the 75 weight %, so guaranteeing that the water miscible while of mold can improve hear resistance.
The water-soluble casting of technical scheme 7 manufacture method of mold, its characteristics are, comprise: will comprise the water-soluble binder of at least a kind of inorganic sulfur acid compound in magnesium sulfate, aluminum sulfate, sodium sulphate, nickelous sulfate, the manganese sulfate and water and be added in the fire resistance shot-like particle that foundry goods sand uses and mix, thereby obtain the 1st operation of foundry goods sand; This foundry goods sand is carried out the 2nd operation of moulding; The inorganic sulfur acid compound in keeping foundry goods sand contains at least under the state of some crystallization water thereby foundry goods sand is carried out the 3rd operation that drying obtains mold.
When making mold, at first, in the 1st operation, the water that will comprise the water-soluble binder of at least a kind of inorganic sulfur acid compound in magnesium sulfate, aluminum sulfate, sodium sulphate, nickelous sulfate, the manganese sulfate and be used for dissolving this binding agent is added on the fire resistance shot-like particle that foundry goods sand such as silica sand use to be mixed, thereby obtains foundry goods sand.Then, in the 2nd operation, this foundry goods sand is carried out moulding in the mould of regulation.In the 3rd operation, foundry goods sand after the moulding is heated etc., water in the foundry goods sand is removed and carried out drying, but this moment, inorganic sulfur acid compound in keeping foundry goods sand contains at least under the state of some crystallization water foundry goods sand is carried out drying, because in dried mold, the inorganic sulfur acid compound exists with the state of hydrate, so mold has intensity.
Drying means in the 3rd operation as foundry goods sand, be water to be removed keeping under the state that the inorganic sulfur acid compound contains some crystallization water at least, thereby, preferably adopt and utilize microwave that foundry goods sand is shone, makes the method for evaporating earlier than the moisture in the big foundry goods sand of the dielectric coefficient of the crystallization water.But, do not become no hydrate, can utilize microwave method in addition yet as the inorganic sulfur acid compound.Specifically, can use, utilize the method for this heat of vaporization moisture to the mold blowing hot-air; The heating of metal mould makes the method for its sclerosis to filling foundry goods sand wherein; In mould, reduce pressure behind the filling foundry goods sand, make method that moisture evaporates etc.Also these methods can be used in combination.
The water-soluble casting of technical scheme 8 manufacture method of mold, its characteristics are, comprising: will contain the binding agent of magnesium sulfate 0.5～10.0 weight portion that is equivalent to 7 hydrates and the water of the consoluet amount of magnesium sulfate in this binding agent can be added and mix the 1st operation that obtains foundry goods sand in the fire resistance shot-like particle 100 weight portions that foundry goods sand is used; This foundry goods sand is carried out the 2nd operation of moulding; The magnesium sulfate in keeping foundry goods sand contains at least under the state of some crystallization water thereby foundry goods sand is carried out the 3rd operation that drying obtains mold.
When making mold, at first, in the 1st operation, obtain foundry goods sand in the fire resistance shot-like particle 100 weight portions that foundry goods sand such as silica sand are used with containing the water miscible binding agent of magnesium sulfate 0.5～10.0 weight portion that is equivalent to 7 hydrates and the water of the consoluet amount of magnesium sulfate in this binding agent can being added and mixes.Then, in the 2nd operation, this foundry goods sand is carried out moulding in the mould of regulation.In the 3rd operation, foundry goods sand after the moulding is heated etc., from foundry goods sand, carry out drying except that anhydrating, but this moment, magnesium sulfate in keeping foundry goods sand contains at least under the state of some crystallization water foundry goods sand is carried out drying, because in dried mold, magnesium sulfate exists with the state of hydrate, so mold has intensity.
In addition, interpolation can make the water of the consoluet amount of magnesium sulfate, owing to binding agent can mix with the fire resistance shot-like particle that foundry goods sand is used fully, so the fire resistance shot-like particle that foundry goods sand is used can be coated by binding agent reliably.
But, the drying means in the 3rd operation as foundry goods sand, identical with the invention of technical scheme 7, but the whole bag of tricks of applications exploiting microwave and Wen Feng etc.
The water-soluble casting of technical scheme 9 manufacture method of mold, its characteristics are, on the basis of the invention of technical scheme 7, described binding agent is at least a kind in sodium dihydrogen phosphate and the potassium dihydrogen phosphate to be cooperated with described inorganic sulfur acid compound with the ratio below the 75 weight % form.Thus, by at least a kind in sodium dihydrogen phosphate and the potassium dihydrogen phosphate is cooperated with the inorganic sulfur acid compound with the ratio below the 75 weight %, so guaranteeing that the water miscible while of mold can improve hear resistance.
The water-soluble casting of technical scheme 10 manufacture method of mold, its characteristics are, on the basis of the invention of technical scheme 7, described binding agent is at least a kind in tricalcium phosphate, aluminum phosphate, tertiary sodium phosphate, diphosphate sodium, sodium hydrogen phosphate 12 hydrates to be cooperated with described inorganic sulfur acid compound with the ratio below the 50 weight % form.Thus, by at least a kind in tricalcium phosphate, aluminum phosphate, tertiary sodium phosphate, diphosphate sodium, sodium hydrogen phosphate 12 hydrates is cooperated with the inorganic sulfur acid compound with the ratio below the 50 weight %, so guaranteeing that the water miscible while of mold can improve hear resistance.
The water-soluble casting of technical scheme 11 is with the manufacture method of mold, its characteristics, and on the basis of the invention of technical scheme 7, described binding agent is magnesium chloride to be cooperated with described inorganic sulfur acid compound with the ratio below the 75 weight % form.Thus, by magnesium chloride is joined with ratio below the 75 weight % and inorganic sulfur acid compound and, so guaranteeing that the water miscible while of mold can improve hear resistance.
The water-soluble casting of technical scheme 12 is with the manufacture method of mold, its characteristics, on the basis of any 1 invention in technical scheme 7～11, in described the 3rd operation, utilizes microwave and warm wind that drying is carried out in described foundry goods sand heating.After with microwave foundry goods sand being shone, because the moisture in the foundry goods sand is bigger than the dielectric coefficient of the crystallization water of inorganic sulfur acid compound, so evaporate earlier than the crystallization water.Therefore, can anhydrate keeping to remove under the state of the crystallization water that the inorganic sulfur acid compound contains some at least.
In addition, in the occasion that warm wind is heated to foundry goods sand and to foundry goods sand, as the temperature with warm wind be set in the inorganic sulfur acid compound the crystallization water not exclusively dehydration set point of temperature (for example, 200 ℃) below, then the moisture in the foundry goods sand evaporates earlier at 100 ℃ under condition of normal pressure, thereby with above-mentioned the dry same of microwave that utilize, can water be evaporated keeping under the state of the crystallization water that the inorganic sulfur acid compound contains some at least.
The water-soluble casting of technical scheme 13 manufacture method of mold, its characteristics are, on the basis of any 1 invention in technical scheme 7～12, in described the 2nd operation, described foundry goods sandfilling are carried out moulding in the cavity of the ceramic die of aeration.Therefore, when in the 3rd operation foundry goods sand being carried out drying, moisture evaporated can be emitted to the outside equably from the ceramic die of aeration, can make the intensity homogenising of mold.
The effect of invention
Adopt water-soluble casting of the present invention with mold and manufacture method thereof, can obtain following effect.
1) utilize the binding agent contain the good inorganic sulfur acid compound of water-soluble to constitute water-soluble casting mold, need only mold is immersed in the water and just can easily make mold defeated and dispersed, thereby recyclable binding agent can make binding agent reuse efficiently.In addition, the fusing point of inorganic sulfur acid compound is more than 770 ℃, thereby uses the occasion of this mold in the casting of aluminium alloy castings, and the inorganic sulfur acid compound can fusion and binding agent can be easily reclaimed in vitreous.In addition, the gas that takes place during casting only is steam, can carry out casting manipulations under the environment of safety.
In addition, the inorganic sulfur acid compound is bigger than intensity under the state of no hydrate under the state of the hydrate that contains the crystallization water, and use under the drying regime of mold in water-soluble casting of the present invention, the inorganic sulfur acid compound of binding agent contains the crystallization water, thereby can fully guarantee the intensity of mold.And, multiple inorganic sulfur acid compound ratio is in accordance with regulations mixed, make mixed crystal during by foundry goods sand drying, the peak value that the binding agent integral intensity is occurred slows down, has intensity for large-scale More's ratio, even thereby the amount of the crystallization water changes or in the amount occasion devious of mold intercrystalline water, also can fully guarantee the mold integral intensity.
2) because binding agent contains magnesium sulfate 0.5～10.0 weight portion, just can guarantee enough mold strength with the magnesium sulfate of the amount of appropriateness, the amount of the water of interpolation also can reduce in order to make the magnesium sulfate dissolving, and the filling of foundry goods sand is also good.And, magnesium sulfate under the state of hydrate, especially big than intensity under the state of no hydrate under the state of 3～4 hydrates, thereby make the magnesium sulfate in the drying regime bottom mold become the structure that contains the crystallization water that is equivalent to 1～5 hydrate, thereby can fully guarantee the intensity of mold.
3) phosphate cpd and magnesium chloride are cooperated the binding agent that forms with the ratio of stipulating with the inorganic sulfur acid compound, the hear resistance when guaranteeing that the water miscible while of mold can be improved cast by using.
4) when mold is used in the water-soluble casting of manufacturing, the water that comprises the amount of the binding agent of inorganic sulfur acid compound and solubilized inorganic sulfur acid compound added in the fire resistance shot-like particle obtain foundry goods sand, with microwave irradiation foundry goods sand is carried out drying, the crystallization water evaporation earlier easily that Free water in the high foundry goods sand of dielectric coefficient contains than inorganic sulfur acid compound can be carried out drying with foundry goods sand keeping under the state that the inorganic sulfur acid compound contains some crystallization water at least.In addition, supply with warm wind to foundry goods sand, can obtain same effect by the temperature below the set point of temperature of dewatering with the inorganic sulfur acid compound.
5) when mold is used in the water-soluble casting of manufacturing, to carry out filling in the cavity of foundry goods sand in the ceramic die of aeration to carry out moulding, after moulding, foundry goods sand is carried out the occasion of drying, moisture evaporated is discharged to the outside equably from the ceramic die of aeration, thereby can restrain the inequality of the amount of the crystallization water that the inorganic sulfur acid compound contained as much as possible, make the intensity homogenising of the mold that obtains.
Description of drawings
Fig. 1 is the figure of the relation of expression magnesium sulfate hydrate of example of the present invention and compressive strength.
Fig. 2 is the figures of expression magnesium sulfate 7 hydrates with respect to the solubility of water.
Fig. 3 is the key diagram of the foundry goods sand of expression in the 2nd operation to the packing job in the mould.
Fig. 4 is the key diagram that utilizes the drying operation of microwave in expression the 3rd operation.
Fig. 5 is the key diagram that utilizes the drying operation of warm wind in expression the 3rd operation.
The specific embodiment
Below example of the present invention is described.This example is to apply the present invention to the example of the casting of aluminium alloy castings with mold and manufacture method thereof.At first, describe with mold having used water-soluble casting of the present invention.
At first, (Japanese: Off ラ タ リ one) foundry goods sand such as silica sand describes with mold with the water-soluble casting that the binding agent that mixes in the fire resistance shot-like particle (hereinafter referred to as the fire resistance shot-like particle) has magnesium sulfate hydrate to Fu Lateli.The occasion that this mold is made with magnesium sulfate 7 hydrates with the consoluet water of these magnesium sulfate 7 hydrates can be added and mixes to the fire resistance shot-like particle, coats the fire resistance shot-like particle with binding agent, with this as foundry goods sand.Then, this foundry goods sandfilling in mould, after the shape with foundry goods sand molding one-tenth regulation, is made the water evaporates in the foundry goods sand, thereby obtains mold.
But magnesium sulfate can occur sizable difference according to the amount of its crystallization water that contains on the intensity.Fig. 1 represents the hydration level of magnesium sulfate and the relation of mold strength, is to obtain by following experiment.That is, use Fu Lateli silica sand 100 weight portions, add magnesium sulfate 7 hydrates, 3 weight portions and water formation foundry goods sand to it as the fire resistance shot-like particle.Moulding is the test film tamping tool that utilizes JIS Z 2601 regulation, is that the test film of 30mm, high 50mm is made moulding firm by ramming through 3 times and made test film with diameter.Then, be that the microwave of 700W shines and makes the test film drying with power.At this moment, the amount of the crystallization water that magnesium sulfate contains in the test film is changed, the compressive strength of each test film is measured by regulating drying time (irradiation time of microwave).The amount of the crystallization water of the magnesium sulfate in the test film is calculated by the following method: the test film after the microwave drying is further carried out drying at 300 ℃ become no hydrate fully up to magnesium sulfate, regard the weight of the test film that reduced before and after this drying the amount of the crystallization water that magnesium sulfate contained in the test film as, calculate than amount from the magnesium sulfate that adds according to the More.
The hydrate of magnesium sulfate is 1,4,7 and 12 hydrates, but as shown in Figure 1, about 1～6 hydrate can be used for mold, and the preferable scope that can bring into play intensity is 1～5 hydrate.Therefore, wish that the magnesium sulfate in the drying regime bottom mold contains the crystallization water that is equivalent to 1～5 hydrate.And preferably magnesium sulfate contains the crystallization water that is equivalent to 3～4 hydrates.
Below, the relation of the crystallization water yield of the compressive strength of the addition of magnesium sulfate 7 hydrates and mold and magnesium sulfate is described.Here, utilize power 700W the microwave irradiation official hour method and under 200 ℃ warm wind dry 1 hour method, make water evaporates, the intensity of test film and the crystallization water of magnesium sulfate are measured by the test film of method moulding same as described above.Here, the dielectric coefficient of the moisture in the test film is than the dielectric coefficient height of the crystallization water of magnesium sulfate, thereby the occasion of test film being shone with microwave, and moisture is easily than crystallization water evaporation earlier.Therefore, by regulating the irradiation time of microwave, can change the amount of the crystallization water that magnesium sulfate contains.Its result is as shown in table 1.
Table 1
As shown in table 1,1 minute drying of microwave can obtain high compressive strength, and the water gaging compound of the crystallization water of this moment is scaled 1～3 hydration.Dry test film did not almost have compressive strength, the crystallization water less than 1 hydration yet in 200 ℃, 1 hour, and, can think that this crystallization water is that the moisture that absorbs forms from atmosphere.The addition of magnesium sulfate 7 hydrates is the occasion of 0.5 weight portion, can obtain the intensity of wet type mold degree.The addition of magnesium sulfate 7 hydrates is the above occasions of 12.5 weight portions, and when test film was dry, the gasification of a large amount of Free water that exist in the test film caused the inner hole that produces of test film, and intensity descends successively.
In addition, in the many occasions of the addition of magnesium sulfate 7 hydrates, add also just increase naturally of amount of the water that is used to dissolve these magnesium sulfate 7 hydrates.Like this, to the occasion that foundry goods sand carries out moulding, the filling of foundry goods sand in the mould non-constant that becomes.Especially make the occasion of the such complex-shaped casting core of casting core that the water jacket of engine for automobile uses, filling is even more important.Therefore, the addition of magnesium sulfate 7 hydrates is from the occasion of 0.5 weight portion of weight portion to 10, and casting mould has required intensity and good to the filling of mould.
But, the occasion of adding separately at magnesium sulfate 7 hydrates, as shown in Figure 1, compressive strength maximum during the crystallization water of regulation (crystallization water that is equivalent to 3～4 hydrates), but the crystallization water in the mold might not evenly evaporate when dry.In addition, magnesium sulfate exists moisture absorption to make the problem of the strength deterioration that crystallization water quantitative changeization causes.For this reason, when drying is carried out in the combination of other inorganic sulfur acid compounds and magnesium sulfate,, whether the More different with respect to the crystallization water than is had intensity as mixed crystal, and during moisture absorption intensity whether easy deterioration is studied.Table 2 is the intensity after the microwave drying of test film of the occasion after other inorganic sulfur acid compounds and magnesium sulfate are made up in expression, compressive strength and the 600 ℃ of soluble tests after the moisture absorption.
Table 2
Here, as other inorganic sulfur acid compounds, aluminum sulfate 12 hydrates, aluminum sulfate, sodium sulphate 10 hydrates, nickelous sulfate 6 hydrates, manganese sulfate 5 hydrates have been used.Use the Fu Lateli silica sand as the fire resistance shot-like particle, magnesium sulfate 7 hydrates 2.7 weight portions and other inorganic sulfur acid compound 0.3 weight portions as binding agent are added in this fire resistance shot-like particle, the water that adds 2.4 weight portions again forms foundry goods sand.Method same as described above is used in moulding, and having made diameter is the test film of 30mm, high 50mm.Microwave irradiating time is 1 minute and 3 minutes, and just dry back is measured compressive strength.And, in order to make the test film moisture absorption, each test film after microwave drying is placed on water-filling (Japanese: water り) placed 24 hours in the drier, allow and measure compressive strength once more after the test film moisture absorption.
When magnesium sulfate 7 hydrates were independent, with the occasion of microwave irradiation after 3 minutes, compressive strength descended, but by making up with other inorganic sulfur acid compounds, can prevent that intensity from descending.And aluminum sulfate 12 hydrates, aluminum sulfate, nickelous sulfate 6 hydrates, manganese sulfate 5 hydrates are compared with the occasion that magnesium sulfate 7 hydrates add separately, have intensity after the moisture absorption, can see the improved strength after the moisture absorption.
As with other inorganic compounds of magnesium sulfate combination, fusing point is in the average pouring temperature of aluminium alloy castings promptly more than 770 ℃, can fusion during cast, soluble in water, and easily and magnesium sulfate become mixed crystal, the inorganic sulfur acid compound shown in the table 3 preferably.
Table 3
| Meltage with respect to 100 gram water | Fusing point | |
| Magnesium sulfate | 26.9g/100g(0℃) | 1185 |
| Aluminum sulfate | ||
| 12 hydrates | 36.2g/100g(20℃) | 770℃ |
| Aluminum sulfate | 36.2g/100g(20℃) | 770 |
| Sodium sulphate | ||
| 10 hydrates | 19.4g/100g(20℃) | 884℃ |
| | 39.7g/100g(20℃) | 840℃ |
| Manganese | 75.3g/100g(25℃) | 850℃ |
Have the mold of the binding agent that contains these inorganic sulfur acid compounds, as shown in table 2, in 600 ℃ of soluble tests, test film is defeated and dispersed easily in water.Here, these 600 ℃ of soluble tests, whether the test film of microwave irradiation after 1 minute carries out 15 minutes roasting in 600 ℃, be immersed in after the cooling to see in the water and defeated and dispersedly judge.But, above and water-soluble good even other inorganic compounds are identical with the inorganic sulfur acid compound of table 3 as long as have fusing point more than 770 ℃ with respect to the minimum 19.4g (20 ℃) of the meltage of 100 gram water, no matter be which kind of material can.
The expression of table 4～table 7 changes mixed proportion is added the occasion of other inorganic sulfur acid compounds in magnesium sulfate 7 hydrates compressive strength and 600 ℃ of soluble tests of each test film.
Table 4
Table 5
Table 6
Table 7
The fire resistance shot-like particle uses the Fu Lateli silica sand, and adding the binding agent total amount is that 3 weight portions, water are that 2.4 weight portions make test film, utilizes the dry of microwave irradiation and carries out 200 ℃, 1 hour drying as the reference data, carries out compression test.Aluminum sulfate 12 hydrates, sodium sulphate 10 hydrates, nickelous sulfate 6 hydrates, manganese sulfate 5 hydrates even constitute the occasion of binding agent separately, utilize the drying of microwave irradiation to find to have intensity, also find to have intensity by mixing with magnesium sulfate 7 hydrates.And in all combinations, the result of 600 ℃ of soluble tests is good, and will have can be easily defeated and dispersed after the mold immersion of binding agent of these combinations.Especially as seen, in cooperating in the example of magnesium sulfate and aluminum sulfate, can obtain high compressive strength from table 4～table 7.
And 200 ℃, 1 hour drying, all combinations do not have intensity, can not get intensity under the no hydrate state, thereby as can be known, it is very important keeping the crystallization water in the inorganic sulfur acid compound.In addition,, when adding moisture, hydrate can be obtained, same effect can be obtained certainly even use the no hydrate of inorganic sulfur acid compound as binding agent.
Below, the occasion that other inorganic compounds are added in magnesium sulfate 7 hydrates is described.The average pouring temperature of aluminium alloy castings is about 770 ℃, and the part of mold can become localized hyperthermia during cast, but more than 200 ℃, the crystallization water of magnesium sulfate separates evaporation and dewaters, and magnesium sulfate becomes no hydrate, thereby local strength descends., add to the fire resistance shot-like particle with magnesium sulfate 7 hydrates for this reason, can improve hear resistance by other inorganic compounds with following explanation.
At first, the expression of table 8, table 9 is combined to form sodium dihydrogen phosphate or potassium dihydrogen phosphate and magnesium sulfate 7 hydrates compressive strength and 600 ℃ of soluble tests of the occasion of mold.
Table 8
Table 9
The fire resistance shot-like particle uses the Fu Lateli silica sand, and adding the binding agent total amount is that 3 weight portions, water are that 2.4 weight portions make test film, utilizes the dry of microwave irradiation and carries out 200 ℃, 1 hour drying as the reference data, carries out compression test.Even sodium dihydrogen phosphate and potassium dihydrogen phosphate also all have intensity when using separately, can be used as binding agent and use, but water insoluble in 600 ℃ of soluble tests.But, with these occasions that cooperates with magnesium sulfate 7 hydrates with the ratio below the 75 weight %, as limit in water add flanging stir will be defeated and dispersed for sand grains (be called more than 60 seconds, defeated and dispersed) by pressurization, guarantee water-soluble.In addition, also have intensity after 200 ℃, the 1 hour drying, thereby hear resistance is good, problems such as the sand washing of mold, distortion, be full of cracks in the time of can solving cast.And sodium dihydrogen phosphate and potassium dihydrogen phosphate as mentioned above, can both improve hear resistance, thereby also can mix use, in this occasion, can cooperate magnesium sulfate 7 hydrates with the ratio below the 75 weight %.
Below, table 10～table 14 expression is combined to form other inorganic phosphate compounds and magnesium sulfate 7 hydrates compressive strength and 600 ℃ of soluble tests of the occasion of mold.
Table 10
Table 11
Table 12
Table 13
Table 14
As other inorganic phosphate compounds, tricalcium phosphate, aluminum phosphate, tertiary sodium phosphate 12 hydrates, diphosphate sodium, sodium hydrogen phosphate 12 hydrates have been used.Do not have intensity when these phosphate cpds are independent, can not use as binding agent.But, with the occasion that the ratio below the 50 weight % cooperates with magnesium sulfate, under the both sides' of microwave drying and 200 ℃ of dryings the condition, have compressive strength and guarantee water-solublely, thereby can be used as binding agent and use.
And table 15 expression is combined to form magnesium chloride and magnesium sulfate 7 hydrates compressive strength and 600 ℃ of soluble tests of the occasion of mold.
Table 15
The independent use of magnesium chloride also has intensity, and can be used as binding agent and use, but water insoluble in 600 ℃ of soluble tests.But, with ratio below the 75 weight % and the occasion that magnesium sulfate 7 hydrates cooperate, can guarantee water-soluble magnesium chloride.In addition, also have intensity after 200 ℃, the 1 hour drying, thereby hear resistance is good, problems such as the sand washing of mold, distortion, be full of cracks in the time of can solving cast.And, utilize the drying of microwave irradiation, at irradiation time, the intensity height of 30 seconds weak points, thereby the productivity ratio can improve moulding the time.
Water-soluble casting mold about above explanation, shown in table 16, the general various fire resistance shot-like particles that use use magnesium sulfate 7 hydrates separately, or with fusing point more than 770 ℃ and have water miscible other inorganic sulfur acid compounds and cooperate with magnesium sulfate 7 hydrates with various mixed proportions, make the compressive strength of the occasion of molds with various drying means.In addition, in the table 17, as a comparative example, the complementary testing result of the mold of record in the relevant above-mentioned patent documentation 2 of expression.
Table 16
Table 17
According to table 16, table 17, used mold of the present invention, compare with the mold of patent documentation 2, not only the amount of binding agent can reduce, and finds to have enough compressive strengths.In addition, cooperation example as binding agent of the present invention, from the data of the compressive strength of the mold of each table and collapsibility as seen, magnesium sulfate and aluminum sulfate cooperate example, magnesium sulfate and sodium dihydrogen phosphate and potassium dihydrogen phosphate etc. cooperate example, magnesium sulfate and aluminum sulfate and sodium dihydrogen phosphate and potassium dihydrogen phosphate etc. to cooperate example etc. be preferable cooperation example.
As the fire resistance shot-like particle, as long as what kind no matter the diameter of the averaged particles that uses as foundry goods sand roughly at the sand of the particle size of 0.05mm (280 order)～1mm (16 order), use can.For example, metal shot-like particle such as the crushed material of domestic silica sand, import silica sand, zircon sand, chromite sand, olivine sand, slag sand, carbon granule, mullite sand, alumina sand, chamotte sand, ceramic sand, porous ceramic sand, fused ceramic sand, various glass sand, the spherical sand of double glazing, various refractory materials, steel grit ball and the fire resistance shot-like particle used as the various foundry goods sand that the foundry goods sand of these reclaimed sands etc. uses.
In addition, in order to prevent casting flaw, can cooperate with foundry goods sand or binding agent with ormal weight being added on the interior iron oxide of foundry goods sand, iron powder, coal dust, graphite powder, wood powder, talcum powder, starch, grain dust, silica China, zircon China, olive onyx etc. usually.
And, in order to improve filling, tungsten disulfide, molybdenum bisuphide, the hydrocarbon class as organic lubricant, ployalkylene glycol class, silicone, fluorine class, phenylate, the phosphate lubricant as inorganic lubricant can be cooperated with foundry goods sand or binding agent with ormal weight mould.
And, can use alcohol to be coated with type, water-based to mold and be coated with type, powder and be coated with type, surface stabilizer, prevent the Modeling Material that telloy that pore is used etc. is coated with mould surface usually.
Below, the manufacture method that utilization is contained the water-soluble binder manufacturing mold of above-mentioned various inorganic sulfur acid compounds describes.The manufacture method of this mold especially applies the present invention to an example of the casting core of used in aluminium alloy casting.
The manufacture method of this mold comprises: will comprise the above-mentioned water-soluble binder of inorganic sulfur acid compound and water and be added in the fire resistance foundry goods sand and mix, thereby obtain the 1st operation of foundry goods sand; This foundry goods sand is carried out the 2nd operation of moulding; The inorganic sulfur acid compound in keeping foundry goods sand contains at least under the state of some crystallization water thereby foundry goods sand is carried out the 3rd operation that drying obtains mold.
At first, in the 1st operation, contain the inorganic sulfur acid compound of the fusing point more than the average pouring temperature (770 ℃) with aluminium alloy casting in the binding agent in adding fire resistance foundry goods sand to.Specifically, as mentioned above, independent use magnesium sulfate 7 hydrates are arranged, or other inorganic sulfur acid compounds such as aluminum sulfate are mixed with these magnesium sulfate 7 hydrates, or with these other inorganic sulfur acid compounds use separately etc.And, in order to improve the hear resistance of binding agent, also can be in guaranteeing water miscible scope, above-mentioned various phosphate cpds and magnesium chlorides such as sodium dihydrogen phosphate to be cooperated the material that forms with ormal weight.
Here, the addition of moisture preferably can dissolve the amount of binding agent.This is because binding agent just begins to be coated by the fire resistance shot-like particle equably after dissolving, thereby has the cause of high intensity.But, meltage Yin Wendu and different for example, is heated to the fire resistance shot-like particle 200 ℃ (temperature that the crystallization water in the inorganic phosphate compound dewaters) following occasion in advance, or mold carried out dry occasion below 200 ℃, moisture is heated and the solubility of binding agent is risen.Therefore, the minimum of a value of the addition of the water in the 1st operation be can 200 ℃ with the consoluet amount of binding agent, maximum roughly is to make the consoluet amount of binding agent under the normal temperature.
And water in atmosphere 100 ℃ be boiling point, but pressurization back boiling point rises.Fig. 2 represents that magnesium sulfate 7 hydrates under the temperature of different water are with respect to the solubility of water.Thus, if water temperature rises, then the solubility of magnesium sulfate also rises.For example, 0 ℃ solubility is 53.9%, and this moment, the ratio of water was 46.1 with respect to binding agent 53.9.On the other hand, 200 ℃ solubility is 95.5%, and with respect to binding agent 95.5, the ratio of water is 4.5, and the addition of water is few.But, in the industrial device that will make the boiling point of water rise to 200 ℃ the water pressurization is packed the moulding machine of casting usefulness into, be a bit difficult, thereby be considered to be a bit larger tham 100 ℃ for limiting to.Concentration in the time of 100 ℃ is 74.7%, and in this occasion, with respect to binding agent 74.7, water is 25.3.
Below, as shown in Figure 3, in the 2nd operation, will be blown into by the foundry goods sand S that the 1st operation obtains in the casting core shaping cavity 2 of ceramic die 1 of aeration.Ceramic die 1 is made of 2 mold dividing body 1a, 1b of cutting apart up and down, and ceramic die is covered by aluminium shell member 3.With foundry goods sand S in cavity 2 during filling, forced air is acted in the blowing of the upside that is arranged on ceramic die 14, by blowing nozzle 5 foundry goods sand S is sprayed in the casting core shaping cavity 2 of the inside that is formed at ceramic die 1, foundry goods sand S is carried out pressurized filling make foundry goods sand S be shaped to the shape of regulation in this cavity 2.
And, as shown in Figure 4, in the 3rd operation, on one side for make microwave to filling the ceramic die 1 of foundry goods sand S carry out impartial irradiation and agitator 6 rotated microwave being carried out the irradiation of stipulated time from magnetron 7.Foundry goods sand S effect in 1 pair of cavity of this microwave penetrating ceramic die 2.Here, in foundry goods sand S, though there is the moisture of 2 states of the crystallization water of Free water and inorganic sulfur acid compound, but because Free water is bigger than crystallization water dielectric coefficient, thereby Free water is evaporated earlier than the crystallization water is easy, inorganic sulfur acid compound in keeping foundry goods sand S contains under the state of some crystallization water at least, and the Free water in the foundry goods sand S is evaporated.The steam that evaporation produces, by suction pump 8 via attracting cover 9, attracting flexible pipe 10 and discharge to the outside of ceramic die.Thus, by foundry goods sand is carried out drying, the inorganic sulfur acid compound of binding agent contains the crystallization water and has intensity under drying regime, thereby can fully guarantee the intensity of the mold that obtained by drying.
Here, because ceramic die 1 has aeration, moisture evaporated is discharged to the outside equably from the ceramic die 1 of aeration, thereby can restrain the inequality of the amount of the crystallization water that the inorganic sulfur acid compound contained as much as possible, makes the intensity homogenising of the mold that obtains.
But, the mould that forms cavity 2 is not limited to ceramic die 1, so long as microwave is permeable, also can use the other materials of plastic mould etc.
In addition, in the 3rd operation, to filling the mould of foundry goods sand S supply with warm wind, also can utilize this temperature wind that foundry goods sand S is heated, make foundry goods sand S drying.That is, as shown in Figure 5, supply with warm wind to the airhood 11 on the top that is arranged on mould 1 by air hose 12, and, from airhood 11 warm wind is sent to mould 1, the foundry goods sand S in the cavity 2 that is filled in mould 1 is heated.At this moment, the warm wind temperature (for example, below 200 ℃) and the service time that need not become the degree of no hydrate with the inorganic sulfur acid compound in the foundry goods sand S supplied with.
And, with metal die be heated to below 200 ℃, with the method for foundry goods sandfilling sclerosis; Foundry goods sand is heated to the method that transpiring moisture hardens foundry goods sand after the filling below 200 ℃, in mould; With foundry goods sand in mould after the filling decompression so long as keep under the state that inorganic sulfur acid compound in the binding agent contains the crystallization water foundry goods sand is carried out dry method with the method for transpiring moisture etc., can use any method.
Claims (4)
1. water-soluble casting mold, it is characterized in that, it comprises: fire resistance shot-like particle and water-soluble binder that foundry goods sand is used, this water-soluble binder are that to be 50: 50 or 75: 25 with magnesium sulfate 7 hydrates and aluminum sulfate 12 hydrates, magnesium sulfate 7 hydrates and sodium sulphate 10 hydrates, magnesium sulfate 7 hydrates and nickelous sulfate 6 hydrates or magnesium sulfate 7 hydrates and manganese sulfate 5 hydrates cooperate forms with mixed proportion; Or at least a kind in sodium dihydrogen phosphate and the potassium dihydrogen phosphate ratio with 10～75 weight % cooperated with magnesium sulfate 7 hydrates form; Or at least a kind in tricalcium phosphate, aluminum phosphate, tertiary sodium phosphate 12 hydrates, diphosphate sodium, sodium hydrogen phosphate 12 hydrates ratio with 10～50 weight % cooperated with magnesium sulfate 7 hydrates form; Or magnesium chloride cooperated with magnesium sulfate 7 hydrates with the ratio of 10～75 weight % form,
Wherein under drying regime, magnesium sulfate contains the crystallization water that is equivalent to 1～5 hydrate.
2. a water-soluble casting is with the manufacture method of mold, it is characterized in that, comprise: water-soluble binder and water are added in the fire resistance shot-like particle that foundry goods sand uses mix, thereby obtain the 1st operation of foundry goods sand, this water-soluble binder is that to be 50: 50 or 75: 25 with magnesium sulfate 7 hydrates and aluminum sulfate 12 hydrates, magnesium sulfate 7 hydrates and sodium sulphate 10 hydrates, magnesium sulfate 7 hydrates and nickelous sulfate 6 hydrates or magnesium sulfate 7 hydrates and manganese sulfate 5 hydrates cooperate forms with mixed proportion; Or at least a kind in sodium dihydrogen phosphate and the potassium dihydrogen phosphate ratio with 10～75 weight % cooperated with magnesium sulfate 7 hydrates form; Or at least a kind in tricalcium phosphate, aluminum phosphate, tertiary sodium phosphate 12 hydrates, diphosphate sodium, sodium hydrogen phosphate 12 hydrates ratio with 10～50 weight % cooperated with magnesium sulfate 7 hydrates form; Or magnesium chloride cooperated with magnesium sulfate 7 hydrates with the ratio of 10～75 weight % form; This foundry goods sand is carried out the 2nd operation of moulding; Magnesium sulfate in the mold is contained under the state of the crystallization water that is equivalent to 1～5 hydrate thereby foundry goods sand is carried out the 3rd operation that drying obtains mold.
3. water-soluble casting as claimed in claim 2 is characterized in that with the manufacture method of mold, in described the 3rd operation, by microwave or warm wind drying is carried out in described foundry goods sand heating.
4. water-soluble casting as claimed in claim 2 is characterized in that with the manufacture method of mold, in described the 2nd operation, described foundry goods sandfilling is carried out moulding in the cavity of the ceramic die of aeration.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003043692 | 2003-02-21 | ||
| JP2003043692A JP4223830B2 (en) | 2003-02-21 | 2003-02-21 | Water-soluble casting mold and manufacturing method thereof |
| JP2003-043692 | 2003-02-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1524644A CN1524644A (en) | 2004-09-01 |
| CN1524644B true CN1524644B (en) | 2010-09-15 |
Family
ID=32732979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2004100068956A Expired - Fee Related CN1524644B (en) | 2003-02-21 | 2004-02-20 | Water-soluble casting mold and method for manufacturing the same |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20040238157A1 (en) |
| EP (1) | EP1449601B1 (en) |
| JP (1) | JP4223830B2 (en) |
| CN (1) | CN1524644B (en) |
Families Citing this family (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10311606B3 (en) * | 2003-03-14 | 2004-12-09 | Laempe + Gies Gmbh | Forms and cores containing magnesium sulphate with phosphate / borate additive and their manufacture and use |
| JP2005066634A (en) * | 2003-08-22 | 2005-03-17 | Toyota Motor Corp | Water-soluble core binder, water-soluble core, and method for manufacturing the same |
| KR101110619B1 (en) * | 2006-05-16 | 2012-02-17 | 가부시키가이샤 마에다 세르 사비스 | Apparatus and method for producing casting mold |
| DE102006031191A1 (en) * | 2006-07-04 | 2008-01-10 | Dracowo Forschungs- Und Entwicklungs Gmbh | Inorganic casting core sand binder, useful in aluminum foundry and as a fertilizer, comprises inorganic binder containing elements and ions of potassium ion, calcium ion and magnesium ion, and sulfate, phosphate and oxide |
| US9314941B2 (en) | 2007-07-13 | 2016-04-19 | Advanced Ceramics Manufacturing, Llc | Aggregate-based mandrels for composite part production and composite part production methods |
| EP2190933B1 (en) * | 2007-07-13 | 2019-09-18 | Advanced Ceramics Manufacturing, LLC | Aggregate-based mandrels for composite part production and composite part production methods |
| CN101879579A (en) * | 2010-04-14 | 2010-11-10 | 淮阴工学院 | Non-ceryl pattern material and manufacturing technology used for investment casting thereof |
| JP5933169B2 (en) * | 2010-10-01 | 2016-06-08 | リグナイト株式会社 | Binder coated refractory, mold, mold manufacturing method |
| CN102962395B (en) * | 2012-11-23 | 2014-11-26 | 西安工程大学 | Compound modified water glass binder and preparation method thereof |
| CN104903023B (en) * | 2012-12-19 | 2017-06-16 | 旭有机材工业株式会社 | The manufacture method of precoated sand and its manufacture method and casting mold |
| CN103341593A (en) * | 2013-06-20 | 2013-10-09 | 重庆长江造型材料（集团）股份有限公司 | Drying method for water-based binder wet mold core |
| CN103302231A (en) * | 2013-06-20 | 2013-09-18 | 重庆长江造型材料（集团）股份有限公司 | Solidification method for wet core of water-based adhesive |
| JP6143347B2 (en) * | 2013-07-26 | 2017-06-07 | リグナイト株式会社 | Mold production equipment |
| JP6096378B1 (en) * | 2016-02-15 | 2017-03-15 | 技術研究組合次世代３Ｄ積層造形技術総合開発機構 | Manufacturing method of granular material for manufacturing 3D additive manufacturing mold and manufacturing method of 3D additive manufacturing mold |
| DE102016211930A1 (en) * | 2016-06-30 | 2018-01-04 | Wobben Properties Gmbh | A sizing composition for the production of mold coatings on lost molds or on cores for iron and steel casting |
| CN106966702B (en) * | 2017-04-12 | 2019-10-22 | 苏州轩朗塑料制品有限公司 | A kind of preparation method of biodegradable magnesium-base metal material |
| CN107282881B (en) * | 2017-06-30 | 2019-07-12 | 南昌航空大学 | It is a kind of quickly to solidify water-soluble sand mould casting method |
| CN107511450B (en) * | 2017-09-18 | 2019-07-05 | 桂林中铸机械科技有限公司 | The coating agent of surface layer casting abrasion resistant particles layer when evaporative pattern cast casting |
| CN107971451A (en) * | 2017-11-02 | 2018-05-01 | 深圳市爱能森科技有限公司 | A kind of soluble core based on ternary molten salt system and preparation method and application |
| JP7311965B2 (en) * | 2018-12-07 | 2023-07-20 | 群栄化学工業株式会社 | Mold manufacturing method and mold for mold making |
| JP7269727B2 (en) * | 2018-12-07 | 2023-05-09 | 群栄化学工業株式会社 | Mold and manufacturing method thereof |
| US11724306B1 (en) | 2020-06-26 | 2023-08-15 | Triad National Security, Llc | Coating composition embodiments for use in investment casting methods |
| CN114873601B (en) * | 2022-07-12 | 2022-09-30 | 天津包钢稀土研究院有限责任公司 | Preparation method for synthesizing nano rare earth boride material by microwave heating at low temperature |
| CN116372071B (en) * | 2023-06-06 | 2023-08-08 | 江苏金源高端装备股份有限公司 | Casting equipment of supporting component of planetary gear box of rail transit gearbox |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB600093A (en) * | 1945-08-28 | 1948-03-31 | Jessop William & Sons Ltd | Improvements in the manufacture of moulds for casting metals |
| JPS53119724A (en) * | 1977-03-30 | 1978-10-19 | Hitachi Ltd | Water soluble mold and its preparation |
| JPS54151508A (en) * | 1978-05-22 | 1979-11-28 | Hitachi Ltd | Gypsum mold |
| US4423764A (en) * | 1982-01-25 | 1984-01-03 | International Minerals & Chemical Corp. | Binder for preparing improved cores and molds |
| JPS5952018B2 (en) * | 1982-04-14 | 1984-12-17 | 本田技研工業株式会社 | Precision casting method using water-soluble mold |
| JPS6044150A (en) * | 1983-08-19 | 1985-03-09 | Honda Motor Co Ltd | Production of water soluble casting mold |
| DE3530910A1 (en) * | 1984-08-31 | 1986-03-13 | Hitachi, Ltd., Tokio/Tokyo | METHOD FOR PRODUCING CASTING MOLDS |
| NO162339C (en) * | 1986-01-10 | 1989-12-13 | Norsk Proco As | WATERPROOF AND ABSOLUTELY BUILDING MATERIAL AND PROCEDURE FOR PREPARING THEREOF. |
| SE459971B (en) * | 1986-02-17 | 1989-08-28 | Casco Nobel Ab | COULD TAKE THE WATER FROM A LIMFOG LIKE CRYSTAL WATER |
| JPS62297402A (en) * | 1986-06-17 | 1987-12-24 | Nippon Kokan Kk <Nkk> | Molding method for powder |
| JPS63132745A (en) * | 1986-11-25 | 1988-06-04 | Honda Motor Co Ltd | Production of water soluble casting mold |
| JPS63140741A (en) * | 1986-12-01 | 1988-06-13 | Honda Motor Co Ltd | Manufacture of water soluble mold |
| JPH01130833A (en) * | 1987-11-17 | 1989-05-23 | Honda Motor Co Ltd | Manufacture of water soluble mold |
| GB9022754D0 (en) * | 1990-10-19 | 1990-12-05 | Pilkington Controlled Release | Improvements in or relating to water dispersible moulds |
| US5281242A (en) * | 1991-06-10 | 1994-01-25 | Exportadora De Sal, S.A De C.V. | Method for recovering magnesium sulfate products from mixtures of epsomite and halite |
| JP4117514B2 (en) * | 1998-04-02 | 2008-07-16 | 日産自動車株式会社 | template |
-
2003
- 2003-02-21 JP JP2003043692A patent/JP4223830B2/en not_active Expired - Fee Related
-
2004
- 2004-02-18 EP EP04003620A patent/EP1449601B1/en not_active Expired - Lifetime
- 2004-02-20 US US10/783,740 patent/US20040238157A1/en not_active Abandoned
- 2004-02-20 CN CN2004100068956A patent/CN1524644B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP1449601B1 (en) | 2011-07-13 |
| CN1524644A (en) | 2004-09-01 |
| US20040238157A1 (en) | 2004-12-02 |
| JP2004249340A (en) | 2004-09-09 |
| EP1449601A1 (en) | 2004-08-25 |
| JP4223830B2 (en) | 2009-02-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1524644B (en) | Water-soluble casting mold and method for manufacturing the same | |
| JP3878496B2 (en) | Mold sand and manufacturing method thereof | |
| US7000680B2 (en) | Casting mold and method for manufacturing the same | |
| EP1483072B1 (en) | Gelatin coated sand core and method of making same | |
| US5641015A (en) | Water dispersible molds | |
| CN110267752B (en) | Mold material composition and method for producing mold using same | |
| CN102271836A (en) | Molding material mixture and riser for casting aluminum | |
| CN101947637A (en) | Modified sodium silicate binder for cold core box and preparation thereof | |
| Ünlü et al. | Development and evaluation of a new eco-friendly sodium silicate-based binder system | |
| JPWO2004041460A1 (en) | Dried aggregate mixture, mold making method using the dried aggregate mixture, and casting core | |
| CN110099761A (en) | The manufacturing method of precoated sand and its manufacturing method and the casting mold using it | |
| MX2014012219A (en) | Salt-based cores, method for the production thereof and use thereof. | |
| BRPI0616623B1 (en) | MESKS FOR USE AS CAVITY REPLACEMENTS IN THE MANUFACTURING OF METAL AND NON METAL MOLDING BODIES OF A MALE MATERIAL, AND AS A MACHINE INJECTION PROCESS FOR THE SAME MANUFACTURING | |
| JPH05169184A (en) | High siliceous spherical molding sand and its production | |
| US3832191A (en) | Silicate bonded foundry mold and core sands | |
| JP2007030028A (en) | Method and apparatus for forming water soluble core | |
| JP5393344B2 (en) | Water-soluble mold making method | |
| CN109079095A (en) | A kind of easy filling casting sand of anti-shelling | |
| JP2004249339A (en) | Method for manufacturing water-soluble mold for casting | |
| JP4219720B2 (en) | Manufacturing method of casting mold | |
| Piwonka | Aggregate molding materials | |
| JP2005034892A (en) | Method and device for molding water-soluble core with super-heated steam | |
| JP2902479B2 (en) | Smoke removal mold material | |
| Beňo et al. | Moulding mixtures | |
| JP2965782B2 (en) | Manufacturing method of artificial sand using waste silica sand |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100915 Termination date: 20160220 |