CN110508747A - A kind of sand mould casting method - Google Patents
A kind of sand mould casting method Download PDFInfo
- Publication number
- CN110508747A CN110508747A CN201910874077.4A CN201910874077A CN110508747A CN 110508747 A CN110508747 A CN 110508747A CN 201910874077 A CN201910874077 A CN 201910874077A CN 110508747 A CN110508747 A CN 110508747A
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- Prior art keywords
- sand
- casting method
- binder
- mould casting
- mold
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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
- B22C1/16—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
-
- 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
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses a kind of sand mould casting methods, including step are as follows: mixes Modeling Material, obtains mulling, the Modeling Material includes roughing sand and binder, and the binder includes montmorillonite, phosphoric acid, aluminium oxide, boric acid, iron oxide, coal dust and water；Mulling is injected in mold, die sinking obtains sand core；Sand core is subjected to subsequent moulding, mould assembling, melting casting, peeling step, obtains product.By the above-mentioned means, sand mould casting method of the invention, it can be ensured that intensity, gas permeability, fire resistance, deformability, plasticity and the reuse of sand core have excellent performance, and resistance to water soak is strong, and the resting period is long, improve production efficiency, control easy to produce.
Description
Technical field
The present invention relates to casting technology fields, more particularly to a kind of sand mould casting method.
Background technique
Casting is by metal molten and to be poured into the casting mold type chamber being adapted with part shape, waits its cooled and solidified
Afterwards, the method for blank or part is obtained.It was mostly originally solid-state but the metal for being heated to liquid by casting material matter, and the material of casting film can
To be sand, metal even ceramics.Casting is common manufacturing method, and manufacturing cost is low, and technological flexibility is big, can obtain complexity
Shape and large-scale casting, occupy very big specific gravity in machine-building.Casting technique is broadly divided into sand casting and extraordinary casting
It makes, existing casting mostly uses greatly sand casting.But in existing sand casting the mixing of Modeling Material be all with with mixed,
Influence production efficiency, it is not easy to control.
Summary of the invention
The invention mainly solves the technical problem of providing a kind of sand mould casting method, good application effects.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: a kind of sand mould casting method is provided, is wrapped
Include step are as follows:
(1) Modeling Material is mixed, obtains mulling, the Modeling Material includes roughing sand and binder, the moulding
The content of material each component are as follows: in parts by weight, 100 parts of roughing sand, 0.8-1.5 parts of binder, the binder include montmorillonite,
Phosphoric acid, aluminium oxide, boric acid, iron oxide, coal dust and water, the content of the binder each component are as follows: montmorillonite 10-15%, phosphoric acid
17-22%, aluminium oxide 5-9%, boric acid 0.2-0.5%, iron oxide 0.05-0.1%, coal dust 4-8%, water surplus；
(2) mulling for obtaining step (1) is injected in mold, and die sinking obtains sand core；
(3) sand core for obtaining step (2) carries out subsequent moulding, mould assembling, melting casting, peeling step, is produced
Product.
In a preferred embodiment of the present invention, the mixing of Modeling Material uses intermittent sand mixer in step (1).
In a preferred embodiment of the present invention, roughing sand described in step (1) is silica sand.
In a preferred embodiment of the present invention, the preparation process of binder described in step (1) are as follows: first by phosphoric acid, oxygen
To change aluminium and water heating mixing, add boric acid, finally sequentially adds montmorillonite, iron oxide, coal dust stirring is added in stirring cooling,
Obtain binder.
In a preferred embodiment of the present invention, the heating temperature in the preparation process of binder described in step (1) is
160-190 degrees Celsius.
In a preferred embodiment of the present invention, mulling is injected in mold by blasting unit in step (2).
In a preferred embodiment of the present invention, apply the pressure of 0.4-0.8MPa during injecting in step (2).
In a preferred embodiment of the present invention, mold is heated to 170-180 degrees Celsius before injection in step (2).
In a preferred embodiment of the present invention, it is opened after 1-2 minutes in step (2) according to the thickness of sand core in mold
Mould.
The beneficial effects of the present invention are: sand mould casting method of the invention, it can be ensured that the intensity of sand core, gas permeability, resistance to
Fire, deformability, plasticity and reuse have excellent performance, and resistance to water soak is strong, and the resting period is long, improve production efficiency,
Control easy to produce.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's all other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Embodiment one:
A kind of sand mould casting method, including step are provided are as follows:
(1) binder each component is weighed, specifically: montmorillonite 12kg, phosphoric acid 20kg, aluminium oxide 7kg, boric acid 0.4kg, oxygen
Change iron 0.07kg, coal dust 6kg, water surplus.
(2) phosphoric acid, aluminium oxide and water are first heated into mixing in the reaction vessel, and keeping temperature is 175 degrees Celsius, then plus
Enter boric acid, continue heating stirring, finally sequentially add montmorillonite, iron oxide, continues heating stirring, it is cooling, coal dust stirring is added,
Obtain binder；
(3) weigh 1000kg silica sand and 12kg binder, roughing sand first be added into intermittent sand mixer, restart it is described between
Binder is added in formula of having a rest sand mixer, continuess to mix stirring 1 minute, shakes out to obtain mulling；
(4) mulling that step (3) obtains is fitted into blasting unit, and mold is first heated to 175 degrees Celsius, in 0.6MPa
Under pressure, mulling is injected in mold by compressed air, according to the thickness of sand core in mold, after blowing 2 minutes in mold,
Die sinking, obtains sand core；
(5) sand core for obtaining step (2) carries out subsequent moulding, mould assembling, melting casting, peeling step, is produced
Product.
The sand core obtained to step (4) detects, and instant tensile strength is 2MPa, and instant bending strength is 4MPa, In
It is placed one day, tensile strength 2MPa, bending strength 4MPa in the environment that relative humidity is 30%.
Embodiment two:
A kind of sand mould casting method, including step are provided are as follows:
(1) binder each component is weighed, specifically: montmorillonite 10kg, phosphoric acid 22kg, aluminium oxide 5kg, boric acid 0.2kg, oxygen
Change iron 0.1kg, coal dust 4kg, water surplus.
(2) phosphoric acid, aluminium oxide and water are first heated into mixing in the reaction vessel, and keeping temperature is 160 degrees Celsius, then plus
Enter boric acid, continue heating stirring, finally sequentially add montmorillonite, iron oxide, continues heating stirring, it is cooling, coal dust stirring is added,
Obtain binder；
(3) weigh 100kg silica sand and 15kg binder, roughing sand first be added into intermittent sand mixer, restart it is described between
Binder is added in formula of having a rest sand mixer, continuess to mix stirring 1 minute, shakes out to obtain mulling；
(4) mulling that step (3) obtains is fitted into blasting unit, and mold is first heated to 170 degrees Celsius, in 0.4MPa
Under pressure, mulling is injected in mold by compressed air, according to the thickness of sand core in mold, after blowing 1 minute in mold,
Die sinking, obtains sand core；
(5) sand core for obtaining step (2) carries out subsequent moulding, mould assembling, melting casting, peeling step, is produced
Product.
The sand core obtained to step (4) detects, and instant tensile strength is 1.8MPa, and instant bending strength is
3.3MPa is placed one day, tensile strength 1.7MPa, bending strength 3.2MPa in the environment that relative humidity is 30%.
Embodiment three:
A kind of sand mould casting method, including step are provided are as follows:
(1) binder each component is weighed, specifically: montmorillonite 15kg, phosphatase 11 7kg, aluminium oxide 9kg, boric acid 0.5kg, oxygen
Change iron 0.05kg, coal dust 8kg, water surplus.
(2) phosphoric acid, aluminium oxide and water are first heated into mixing in the reaction vessel, and keeping temperature is 190 degrees Celsius, then plus
Enter boric acid, continue heating stirring, finally sequentially add montmorillonite, iron oxide, continues heating stirring, it is cooling, coal dust stirring is added,
Obtain binder；
(3) weigh 1000kg silica sand and 8kg binder, roughing sand first be added into intermittent sand mixer, restart it is described between
Binder is added in formula of having a rest sand mixer, continuess to mix stirring 2 minutes, shakes out to obtain mulling；
(4) mulling that step (3) obtains is fitted into blasting unit, and mold is first heated to 180 degrees Celsius, in 0.8MPa
Under pressure, mulling is injected in mold by compressed air, according to the thickness of sand core in mold, after blowing 2 minutes in mold,
Die sinking, obtains sand core；
(5) sand core for obtaining step (2) carries out subsequent moulding, mould assembling, melting casting, peeling step, is produced
Product.
The sand core obtained to step (4) detects, and instant tensile strength is 1.7MPa, and instant bending strength is
3.4MPa is placed one day, tensile strength 1.7MPa, bending strength 3.4MPa in the environment that relative humidity is 30%.
In the present invention, there is montmorillonite adhesive property can form complex compound, really under the addition of aluminium ion and iron ion
The stability of sand core is protected, coal dust and montmorillonite cooperate, and can prevent the scab defect of product surface, it is ensured that the light of product surface
Clean degree.
The beneficial effects of the present invention are:
One, the sand mould casting method can ensure the intensity of sand core, gas permeability, fire resistance, deformability, plasticity and return
With property, there is excellent performance；
Two, the sand core resistance to water soak that the sand mould casting method obtains is strong, and the resting period is long, improves production efficiency, is convenient for
Production control.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright description is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (9)
1. a kind of sand mould casting method, which is characterized in that including step are as follows:
(1) Modeling Material is mixed, obtains mulling, the Modeling Material includes roughing sand and binder, the Modeling Material
The content of each component are as follows: in parts by weight, 100 parts of roughing sand, 0.8-1.5 parts of binder, the binder includes montmorillonite, phosphorus
Acid, aluminium oxide, boric acid, iron oxide, coal dust and water, the content of the binder each component are as follows: montmorillonite 10-15%, phosphatase 11 7-
22%, aluminium oxide 5-9%, boric acid 0.2-0.5%, iron oxide 0.05-0.1%, coal dust 4-8%, water surplus；
(2) mulling for obtaining step (1) is injected in mold, and die sinking obtains sand core；
(3) sand core for obtaining step (2) carries out subsequent moulding, mould assembling, melting casting, peeling step, obtains product.
2. sand mould casting method according to claim 1, which is characterized in that the mixing of Modeling Material uses in step (1)
Intermittent sand mixer.
3. sand mould casting method according to claim 1, which is characterized in that roughing sand described in step (1) is silica sand.
4. sand mould casting method according to claim 1, which is characterized in that the preparation of binder described in step (1)
Journey are as follows: first phosphoric acid, aluminium oxide and water are heated and mixed, boric acid is added, finally sequentially adds montmorillonite, iron oxide, is stirred cold
But, coal dust stirring is added, obtains binder.
5. sand mould casting method according to claim 4, which is characterized in that the preparation of binder described in step (1)
Heating temperature in journey is 160-190 degrees Celsius.
6. sand mould casting method according to claim 1, which is characterized in that mulling is penetrated by blasting unit in step (2)
Enter in mold.
7. sand mould casting method according to claim 1, which is characterized in that apply 0.4- during injecting in step (2)
The pressure of 0.8MPa.
8. sand mould casting method according to claim 1, which is characterized in that mold is heated to before injection in step (2)
170-180 degrees Celsius.
9. sand mould casting method according to claim 1, which is characterized in that according to the thickness of sand core in mold in step (2)
Degree is opened after 1-2 minutes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910874077.4A CN110508747A (en) | 2019-09-17 | 2019-09-17 | A kind of sand mould casting method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910874077.4A CN110508747A (en) | 2019-09-17 | 2019-09-17 | A kind of sand mould casting method |
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Citations (13)
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|---|---|---|---|---|
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