CN110170612A - A kind of method and its application method improving inorganic resin sand fluidity - Google Patents
A kind of method and its application method improving inorganic resin sand fluidity Download PDFInfo
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- CN110170612A CN110170612A CN201910449069.5A CN201910449069A CN110170612A CN 110170612 A CN110170612 A CN 110170612A CN 201910449069 A CN201910449069 A CN 201910449069A CN 110170612 A CN110170612 A CN 110170612A
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- sand
- inorganic resin
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- fluidity
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
- B22C1/10—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives for influencing the hardening tendency of the mould material
-
- 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
- B22C1/185—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 containing phosphates, phosphoric acids or its derivatives
-
- 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
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/04—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring
- B22C5/0409—Blending, mixing, kneading or stirring; Methods therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/08—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sprinkling, cooling, or drying
Abstract
The present invention relates to inorganic resin molding sand casting technology fields, more particularly to a kind of method and its application method for improving inorganic resin sand fluidity, the method of the improvement inorganic resin sand fluidity is that the inorganic binder mulling of its total weight 2%-5% is added in inorganic resin molding sand, then silane coupling agent is added according to the 0.3%-0.8% of inorganic resin molding sand total weight and continues mulling, it is finally passed through the moisture removed in inorganic binder after hot-air is dried, dry state precoated sand is made.The method of improvement inorganic resin sand fluidity of the invention, is attached to sand grain surface for inorganic binder, and being passed through hot-air keeps binder dry, obtains dry state precoated sand, to substantially increase the mobility of sand, penetrates sand molding to be subsequent and provides convenience.The application method of the method for improvement inorganic resin sand fluidity of the invention, greatly reduces total amount of liquid, to substantially increase the mobility of sand, fills the sand core that type obtains densification convenient for penetrating sand.
Description
Technical field
The present invention relates to inorganic resin molding sand casting technology fields, and in particular to a kind of improvement inorganic resin sand fluidity
Method and its application method.
Background technique
Binder and auxiliary material can be added in inorganic resin molding sand when in use, and both of which is liquid composition, be added in sand
The mobility that will affect sand afterwards causes the more complicated sand core edge in core shooting that cannot fill completely.
To solve the above problems, the present invention is a kind of improvement inorganic resin sand fluidity and its sand sample preparation method.
Summary of the invention
One of the objects of the present invention is to provide a kind of methods for improving inorganic resin sand fluidity, substantially increase sand
Mobility.
The second object of the present invention is to provide a kind of application method of method for improving inorganic resin sand fluidity, greatly
The mobility of sand is improved greatly, fills the sand core that type obtains densification convenient for penetrating sand.
The present invention realizes that scheme used by the first purpose is: a method of improving inorganic resin sand fluidity,
The inorganic binder mulling of its total weight 2%-5% is added in inorganic resin molding sand, then according to inorganic resin molding sand total weight
0.3%-0.8% silane coupling agent be added continue mulling, be finally passed through hot-air it is dry after remove water in inorganic binder
Point, dry state precoated sand is made.
It is further preferable that silane coupling agent accounts for the 0.6% of inorganic resin molding sand total weight.
Preferably, the inorganic binder is phosphate binders.
Preferably, the phosphate binders include the ingredient of following weight percent: 60%-63% industrial phosphoric acid,
13%-15% aluminium hydroxide, 1.8%-3% boric acid, 0.5%-1% citric acid, 0.6%-0.8% silicic acid, 1.3%-1.6% oxygen
Change magnesium, 0.6%-0.8% zinc oxide, 0.08%-0.10% copper oxide, 0.08%-0.10% yttrium oxide, surplus is water.
Preferably, the phosphate binders include the ingredient of following weight percent: 61.62% industrial phosphoric acid,
14.14% aluminium hydroxide, 2.19% boric acid, 0.73% citric acid, 0.73% silicic acid, 1.46% magnesia, 0.73% zinc oxide,
0.09% copper oxide, 0.09% yttrium oxide, surplus are water.
Preferably, the preparation method of the phosphate binders is the following steps are included: industrial phosphoric acid is heated to boiling by (1)
It rises, powdery aluminium hydroxide is then added under stirring, continue the reactant for being heated to obtaining homogeneous transparent；
(2) boric acid is added in the transparent reaction object of the step (1), heated and stirred to acquisition clear solution；
(3) silicic acid is added in the clear solution of the step (2), heated and stirred to acquisition clear solution；
(4) magnesia is added in the clear solution of the step (3), it is stirring while adding to acquisition clear solution；
(5) zinc oxide is added in the clear solution of the step (4), it is stirring while adding to acquisition clear solution；
(6) citric acid is added in the clear solution of the step (5), it is stirring while adding to acquisition clear solution；
(7) yttrium oxide is added in the clear solution of the step (6), it is stirring while adding to acquisition clear solution；
(8) copper oxide is added in the clear solution of the step (7), it is stirring while adding to clear solution is obtained, as
The phosphate inorganic adhesive.
Preferably, the silane coupling agent is KH550.
Preferably, the temperature of the hot-air is 80-100 DEG C.
The present invention realizes that scheme used by the second purpose is: the side of improvement inorganic resin sand fluidity described in one kind
Method application method prepares sand sample using the method for improving inorganic resin sand fluidity, comprising the following steps: (1) in nothing
The inorganic binder mulling of its total weight 2%-5% is added in machine resin bonded sand；
(2) silane coupling agent is added according to the 0.3%-0.8% of inorganic resin molding sand total weight after the completion of mixing to continue to mix
Sand 60-120s；
(3) molding sand for mixing the step (2) is dry using 80 DEG C -100 DEG C of hot-air, and molding sand is in scattered after drying
Sand shape；
(4) molding sand of the step (3) is added by screening dispersion and accounts for inorganic resin molding sand total weight 0.6-
1.2% aqueous citric acid solution is uniformly mixed, by penetrating sand molding；
(5) after penetrating sand, the air after being passed through drying makes sand sample curing molding to get the sand sample.
Preferably, in the step (4), the mass concentration of aqueous citric acid solution is 50wt%.
Preferably, in the step (4), sand molding is penetrated by core shooter, core shooter mold temperature is 50-80 DEG C.
The method of improvement inorganic resin sand fluidity of the invention, is attached to sand grain surface for inorganic binder, is passed through
Hot-air keeps binder dry, obtains dry state precoated sand, to substantially increase the mobility of sand, for it is subsequent penetrate sand and form provide
It is convenient.
The application method of the method for improvement inorganic resin sand fluidity of the invention, obtained dry state precoated sand is passed through
Sieving obtains loose sand, and liquid auxiliary materials aqueous citric acid solution is added in when use, due in the inorganic binder in dry state precoated sand
Water removes in advance, and the amount of used Auxiliary Liquid Material is seldom, greatly reduces total amount of liquid, to substantially increase the stream of sand
Dynamic property fills the sand core that type obtains densification convenient for penetrating sand；In addition the water in Auxiliary Liquid Material makes the solid-state adhesion agent of sand grain surface again
Liquefaction, is connected with each other sand grains again, due to the catalytic action of auxiliary material, is formed by penetrating sand, makes sand core being dehydrated
Solidified, prepares sand sample.
Specific embodiment
For a better understanding of the present invention, the following examples are to further explanation of the invention, but the contents of the present invention
It is not limited solely to the following examples.
Embodiment 1
A kind of preparation method of sand sample, steps are as follows:
1, roughing sand 2000g is weighed, inorganic phosphate binder 50g is spare；
2, roughing sand and inorganic phosphate binder are added in blender, 120S are stirred, according to roughing sand quality after mixing
0.6%, which is added KH550, continues mulling 90S；
3, after mulling, it is passed through 90 DEG C of hot-air, dry 25min while stirring；
4, dry to obtain dry state precoated sand after the completion, by sieving closed save backup；
5, the aqueous citric acid solution that 12g mass concentration is 50wt% is added in Xiang Shangshu dry state precoated sand, utilizes after mulling 90S
Core shooter penetrates sand, and 70 DEG C of mold temperature；
6, lead to compressed air 1 minute, curing molding；
7, die sinking takes out sand core up to product.
The phosphate binders include the ingredient of following weight percent: 61.62% industrial phosphoric acid, 14.14% hydrogen-oxygen
Change aluminium, 2.19% boric acid, 0.73% citric acid, 0.73% silicic acid, 1.46% magnesia, 0.73% zinc oxide, 0.09% oxidation
Copper, 0.09% yttrium oxide, surplus are water.
Embodiment 2
A kind of preparation method of sand sample, steps are as follows:
1, roughing sand 2000g is weighed, inorganic phosphate binder 40g is spare；
2, roughing sand and inorganic phosphate binder are added in blender, 120S are stirred, according to roughing sand quality after mixing
0.3%, which is added KH550, continues mulling 90S；
3, after mulling, it is passed through 80 DEG C of hot-air, dry 30min while stirring；
4, dry to obtain dry state precoated sand after the completion, by sieving closed save backup；
5, the aqueous citric acid solution that 16g mass concentration is 50wt% is added in Xiang Shangshu dry state precoated sand, utilizes after mulling 90S
Core shooter penetrates sand, and 50 DEG C of mold temperature；
6, lead to compressed air 1 minute, curing molding；
7, die sinking takes out sand core up to product.
The phosphate binders include the ingredient of following weight percent: 61.62% industrial phosphoric acid, 14.14% hydrogen-oxygen
Change aluminium, 2.19% boric acid, 0.73% citric acid, 0.73% silicic acid, 1.46% magnesia, 0.73% zinc oxide, 0.09% oxidation
Copper, 0.09% yttrium oxide, surplus are water.
Embodiment 3
A kind of preparation method of sand sample, steps are as follows:
1, roughing sand 2000g is weighed, inorganic phosphate binder 60g is spare；
2, roughing sand and inorganic phosphate binder are added in blender, 120S are stirred, according to roughing sand quality after mixing
0.8%, which is added KH550, continues mulling 90S；
3, after mulling, it is passed through 100 DEG C of hot-air, dry 20min while stirring；
4, dry to obtain dry state precoated sand after the completion, by sieving closed save backup；
5, the aqueous citric acid solution that 18g mass concentration is 50wt% is added in Xiang Shangshu dry state precoated sand, utilizes after mulling 90S
Core shooter penetrates sand, and 70 DEG C of mold temperature；
6, lead to compressed air 2 minutes, curing molding；
7, die sinking takes out sand core up to product.
The phosphate binders include the ingredient of following weight percent: 61.62% industrial phosphoric acid, 14.14% hydrogen-oxygen
Change aluminium, 2.19% boric acid, 0.73% citric acid, 0.73% silicic acid, 1.46% magnesia, 0.73% zinc oxide, 0.09% oxidation
Copper, 0.09% yttrium oxide, surplus are water.
Embodiment 4
A kind of preparation method of sand sample, steps are as follows:
1, roughing sand 2000g is weighed, inorganic phosphate binder 100g is spare；
2, roughing sand and inorganic phosphate binder are added in blender, 120S are stirred, according to roughing sand quality after mixing
0.6%, which is added KH550, continues mulling 90S；
3, after mulling, it is passed through 85 DEG C of hot-air, dry 30min while stirring；
4, dry to obtain dry state precoated sand after the completion, by sieving closed save backup；
5, the aqueous citric acid solution that 24g mass concentration is 50wt% is added in Xiang Shangshu dry state precoated sand, utilizes after mulling 90S
Core shooter penetrates sand, and 80 DEG C of mold temperature；
6, lead to compressed air 2 minutes, curing molding；
7, die sinking takes out sand core up to product.
The phosphate binders include the ingredient of following weight percent: 61.62% industrial phosphoric acid, 14.14% hydrogen-oxygen
Change aluminium, 2.19% boric acid, 0.73% citric acid, 0.73% silicic acid, 1.46% magnesia, 0.73% zinc oxide, 0.09% oxidation
Copper, 0.09% yttrium oxide, surplus are water.
Comparative example
A kind of preparation method of sand sample, steps are as follows:
1, roughing sand 2000g is weighed, inorganic phosphate binder 50g is spare；
2, roughing sand and inorganic phosphate binder are added in blender, 120S are stirred, according to roughing sand quality after mixing
0.6%, which is added KH550, continues mulling 90S；
3, the aqueous citric acid solution that 12g mass concentration is 50wt% is added while stirring, is penetrated after mulling 90S using core shooter
Sand, 70 DEG C of mold temperature；
6, lead to compressed air 5 minutes, curing molding；
7, die sinking takes out sand core up to product.
The phosphate binders include the ingredient of following weight percent: 61.62% industrial phosphoric acid, 14.14% hydrogen-oxygen
Change aluminium, 2.19% boric acid, 0.73% citric acid, 0.73% silicic acid, 1.46% magnesia, 0.73% zinc oxide, 0.09% oxidation
Copper, 0.09% yttrium oxide, surplus are water.
Experimental results:
Molding sand made from 1-4 of the embodiment of the present invention and comparative example is made to " 8 " word sample of standard using core shooter, respectively
It is passed through compressed air 1min, 2min, 5min, according to GB/T2684-2009 foundry sand and mixture after sample is fully hardened
Test method measures tensile strength.As a result it see the table below:
By upper table data it is found that the average tensile strength of the sample of 1-4 of embodiment of the present invention preparation greatly improves, from sand sample
Average quality sees that sand core consistency is high, and the mobility of side light sand is fine, can penetrate the high sand core of density processed, and because former
Total amount of liquid greatly reduces in sand, and sand sample dry through speed is fast, and demoulding time shortens.Examples 1 and 2 and the ratio of embodiment 3 and 4
Compared with when firm time is 1min, without completely hard saturating, thus intensity is lower than the latter, and the fully hardened gassing time of the present invention is
2min, comparative example need 5min.
To sum up, the application method of the method for improvement inorganic resin sand fluidity of the invention, the dry state overlay film that will be obtained
Sand obtains loose sand by sieving, and liquid auxiliary materials aqueous citric acid solution is added in when use, due to the inorganic bond in dry state precoated sand
Water in agent removes in advance, and the amount of used Auxiliary Liquid Material is seldom, greatly reduces total amount of liquid, to substantially increase
The mobility of sand fills the sand core that type obtains densification convenient for penetrating sand；In addition the water in Auxiliary Liquid Material makes the solid-state adhesion of sand grain surface
Agent is liquefied again, is connected with each other sand grains again, due to the catalytic action of auxiliary material, by penetrating sand molding, being dehydrated
Solidify sand core, prepares sand sample.
The above is a preferred embodiment of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, it is noted that for those skilled in the art, without departing from the principle of the present invention, may be used also
To make several improvement and variation, these, which improve and change, is also considered as protection scope of the present invention.
Claims (10)
1. a kind of method for improving inorganic resin sand fluidity, it is characterised in that: its gross weight is added in inorganic resin molding sand
The inorganic binder mulling of 2%-5% is measured, is then added according to the 0.3%-0.8% of inorganic resin molding sand total weight silane coupled
Agent continues mulling, is finally passed through the moisture removed in inorganic binder after hot-air is dried, dry state precoated sand is made.
2. the method according to claim 1 for improving inorganic resin sand fluidity, it is characterised in that: the inorganic bond
Agent is phosphate binders.
3. the method according to claim 2 for improving inorganic resin sand fluidity, it is characterised in that: the phosphate is viscous
Knot agent includes the ingredient of following weight percent: 60%-63% industrial phosphoric acid, 13%-15% aluminium hydroxide, 1.8%-3% boron
Acid, 0.5%-1% citric acid, 0.6%-0.8% silicic acid, 1.3%-1.6% magnesia, 0.6%-0.8% zinc oxide,
0.08%-0.10% copper oxide, 0.08%-0.10% yttrium oxide, surplus are water.
4. the method according to claim 3 for improving inorganic resin sand fluidity, it is characterised in that: the phosphate is viscous
Knot agent include following weight percent ingredient: 61.62% industrial phosphoric acid, 14.14% aluminium hydroxide, 2.19% boric acid,
0.73% citric acid, 0.73% silicic acid, 1.46% magnesia, 0.73% zinc oxide, 0.09% copper oxide, 0.09% yttrium oxide,
Surplus is water.
5. the method according to claim 3 for improving inorganic resin sand fluidity, it is characterised in that: the phosphate is viscous
The preparation method of agent is tied the following steps are included: industrial phosphoric acid is heated to boiling by (1), powdery hydrogen is then added under stirring
Aluminium oxide continues the reactant for being heated to obtaining homogeneous transparent；
(2) boric acid is added in the transparent reaction object of the step (1), heated and stirred to acquisition clear solution；
(3) silicic acid is added in the clear solution of the step (2), heated and stirred to acquisition clear solution；
(4) magnesia is added in the clear solution of the step (3), it is stirring while adding to acquisition clear solution；
(5) zinc oxide is added in the clear solution of the step (4), it is stirring while adding to acquisition clear solution；
(6) citric acid is added in the clear solution of the step (5), it is stirring while adding to acquisition clear solution；
(7) yttrium oxide is added in the clear solution of the step (6), it is stirring while adding to acquisition clear solution；
(8) copper oxide is added in the clear solution of the step (7), it is stirring while adding to acquisition clear solution, it is as described
Phosphate inorganic adhesive.
6. the method according to claim 1 for improving inorganic resin sand fluidity, it is characterised in that: described silane coupled
Agent is KH550.
7. the method according to claim 1 for improving inorganic resin sand fluidity, it is characterised in that: the hot-air
Temperature is 80-100 DEG C.
8. a kind of improve the method application method of inorganic resin sand fluidity as claim 1-7 is described in any item, special
Sign is, prepares sand sample using the method for improving inorganic resin sand fluidity, comprising the following steps: (1) in inorganic tree
The inorganic binder mulling of its total weight 2%-5% is added in epoxy-type sand；
(2) silane coupling agent is added according to the 0.3%-0.8% of inorganic resin molding sand total weight after the completion of mixing and continues mulling 60-
120s；
(3) molding sand for mixing the step (2) is dry using 80 DEG C -100 DEG C of hot-air, and molding sand is in loose sand after drying
Shape；
(4) molding sand of the step (3) is added by screening dispersion and accounts for inorganic resin molding sand total weight 0.6-1.2%'s
Aqueous citric acid solution is uniformly mixed, by penetrating sand molding；
(5) after penetrating sand, the air after being passed through drying makes sand sample curing molding to get the sand sample.
9. the application method of the method according to claim 8 for improving inorganic resin sand fluidity, it is characterised in that: institute
It states in step (4), the mass concentration of aqueous citric acid solution is 50wt%.
10. the application method of the method according to claim 8 for improving inorganic resin sand fluidity, it is characterised in that:
In the step (4), sand molding is penetrated by core shooter, core shooter mold temperature is 50-80 DEG C.
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| CN113510217A (en) * | 2021-09-15 | 2021-10-19 | 中车戚墅堰机车车辆工艺研究所有限公司 | Inorganic dry precoated sand for warm core box molding and core making method thereof |
| CN113510217B (en) * | 2021-09-15 | 2021-12-24 | 中车戚墅堰机车车辆工艺研究所有限公司 | Inorganic dry precoated sand for warm core box molding and core making method thereof |
| CN113787165A (en) * | 2021-09-29 | 2021-12-14 | 江西特欣实业有限公司 | High-melting-point precoated sand with good fluidity |
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