CN109622889A - In conjunction with the process of silica solution quartz sand and gypsum mould mixture shell - Google Patents
In conjunction with the process of silica solution quartz sand and gypsum mould mixture shell Download PDFInfo
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- CN109622889A CN109622889A CN201811649881.4A CN201811649881A CN109622889A CN 109622889 A CN109622889 A CN 109622889A CN 201811649881 A CN201811649881 A CN 201811649881A CN 109622889 A CN109622889 A CN 109622889A
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- Prior art keywords
- shell
- mixture
- sandbox
- quartz sand
- silica solution
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention discloses the process of a kind of combination silica solution quartz sand and gypsum mould mixture shell, comprising the following steps: a, makes shell using silica solution quartz sand shell side formula；B, selection pours one layer of lower layer's mixture mixed by gypsum mould mixture and water according to the weight ratio of 7:3 in sandbox bottom with the matched sandbox of shell size；C, the shell made in step a is put into sandbox, is packed into sandbox with smashed waste plaster mixture；D, one layer of upper layer mixture mixed by gypsum mould mixture and water according to the weight ratio of 7:3 is poured at the top of sandbox；E, sandbox is put into roaster roasting, maturing temperature is 320 DEG C -380 DEG C, calcining time 2.5h-3.5h.The present invention solves thin-wall special-shaped part and is difficult to fill type in casting process, while being easy to produce knob again using gypsum type melting mould founding；Such mode guarantees mold-filling capacity and surface smoothness.
Description
Technical field
The invention belongs to process for making shell fields, and in particular to a kind of combination silica solution quartz sand and gypsum mould mixture shell
Process.
Background technique
Existing gypsum type melting mould founding mode is easy to steep in wax part surface, the especially back pneumatosis during shell processed,
To cause fleshiness in cast(ing) surface, the case where more acne tumors.There are also during roasting, due to gypsum mould poor air permeability, hold
It is easy to crack, there is winged skin so as to cause cast(ing) surface.It is bad to result in surface quality of continuous castings.
The mode of existing silica solution quartz sand shell, since it does not have good thermal insulation property, for thin-wall special-shaped
The mold-filling capacity of part then cannot be guaranteed.
Summary of the invention
The technical problems to be solved by the invention are in view of the above shortcomings of the prior art, to provide a kind of combination silica solution
The process of quartz sand and gypsum mould mixture shell, in conjunction with the excellent of gypsum type melting mould founding and silica solution quartz sand shell
Point, the shortcomings that both avoiding.
The technical scheme adopted by the invention is that: a kind of technique of combination silica solution quartz sand and gypsum mould mixture shell
Method, comprising the following steps:
A, shell is made using silica solution quartz sand shell side formula；
B, selection pours one layer by gypsum mould mixture and water according to 7:3's in sandbox bottom with the matched sandbox of shell size
Lower layer's mixture that weight ratio mixes；
C, the shell made in step a is put into sandbox, is packed into sandbox with smashed waste plaster mixture；
D, one layer is poured at the top of sandbox to be mixed by gypsum mould mixture and water according to the upper layer that the weight ratio of 7:3 mixes
Object；
E, sandbox is put into roaster roasting, maturing temperature is 320 DEG C -380 DEG C, calcining time 2.5h-3.5h；
F, moulding by casting after taking out the sandbox after roasting, pouring temperature are 700 DEG C -750 DEG C；
G, it after casting complete, is cleared up except case within placement 6 hours or more, cuts off pouring and riser systems.
In one embodiment, in step a, shell is made using silica solution quartz sand shell side formula, specific as follows:
Silica solution is equably applied in ready-made wax-pattern group, then uniformly sprays quartz sand, is repeated above step 4 times -5 after air-drying
Hollow type shell is obtained using steam dewaxing legal system after secondary.
In one embodiment, in step b, lower layer's mixture is with a thickness of 30mm-50mm.
In one embodiment, in step b, gypsum mixture prepares specific as follows:
Weigh gesso, wrought aluminum vanadine powder and purification mullite sand, measurement error≤0.5kg during weighing, according to ripe
The sequence of land plaster, wrought aluminum vanadine powder and purification mullite sand is added in batch mixer, and it is mixed that gypsum is made in stirring 10min-15min
Close material.
In one embodiment, in step c, smashed waste plaster mixture particle size is -80 mesh of 70 mesh.
In one embodiment, in step d, the upper layer mixture is with a thickness of 30mm-50mm.
In one embodiment, in step e, maturing temperature is 350 DEG C, calcining time 3h.
In one embodiment, in step f, pouring temperature is 720 DEG C.
The beneficial effects of the present invention are: it solves thin-wall special-shaped part and is difficult to fill type in casting process, while using gypsum
Type model casting is easy to produce knob again；Such mode guarantees mold-filling capacity and surface smoothness.
Specific embodiment
Below in conjunction with specific embodiment, invention is further described in detail.
Embodiment 1:
A kind of process of combination silica solution quartz sand and gypsum mould mixture shell, comprising the following steps:
Step 1: equably applying silica solution in ready-made wax-pattern group, quartz sand is then uniformly sprayed, the above step is repeated after air-drying
Hollow type shell is obtained using steam dewaxing legal system after rapid 4 times -5 times；
Step 2: gesso, wrought aluminum vanadine powder and purification mullite sand are weighed, measurement error≤0.5kg during weighing,
It is added in batch mixer according to the sequence of gesso, wrought aluminum vanadine powder and purification mullite sand, it is mixed that gypsum is made in stirring 10min
Material is closed, selection pours one layer of weight by gypsum mould mixture and water according to 7:3 with the matched sandbox of shell size, in sandbox bottom
Amount is than the lower layer's mixture mixed, and lower layer's mixture is with a thickness of 30mm；
Step 3: the shell made in step a is put into sandbox, it is packed into sandbox with smashed waste plaster mixture,
Smashed waste plaster mixture particle size is 70 mesh；
Step 4: pouring one layer of upper layer mixed by gypsum mould mixture and water according to the weight ratio of 7:3 at the top of sandbox
Mixture, upper layer mixture is with a thickness of 30mm；
Step 5: sandbox is put into roaster roasting, maturing temperature is 320 DEG C, calcining time 2.5h；
Step 6: moulding by casting after the sandbox after roasting is taken out, pouring temperature is 700 DEG C；
Step 7: being cleared up except case within placement 6 hours or more after casting complete, cutting off pouring and riser systems.
Embodiment 2:
A kind of process of combination silica solution quartz sand and gypsum mould mixture shell, comprising the following steps:
Step 1: equably applying silica solution in ready-made wax-pattern group, quartz sand is then uniformly sprayed, the above step is repeated after air-drying
Hollow type shell is obtained using steam dewaxing legal system after rapid 4 times -5 times；
Step 2: gesso, wrought aluminum vanadine powder and purification mullite sand are weighed, measurement error≤0.5kg during weighing,
It is added in batch mixer according to the sequence of gesso, wrought aluminum vanadine powder and purification mullite sand, it is mixed that gypsum is made in stirring 12min
Material is closed, selection pours one layer of weight by gypsum mould mixture and water according to 7:3 with the matched sandbox of shell size, in sandbox bottom
Amount is than the lower layer's mixture mixed, and lower layer's mixture is with a thickness of 40mm；
Step 3: the shell made in step a is put into sandbox, it is packed into sandbox with smashed waste plaster mixture,
Smashed waste plaster mixture particle size is 75 mesh；
Step 4: pouring one layer of upper layer mixed by gypsum mould mixture and water according to the weight ratio of 7:3 at the top of sandbox
Mixture, upper layer mixture is with a thickness of 40mm；
Step 5: sandbox is put into roaster roasting, maturing temperature is 350 DEG C, calcining time 3h；
Step 6: moulding by casting after the sandbox after roasting is taken out, pouring temperature is 720 DEG C；
Step 7: being cleared up except case within placement 6 hours or more after casting complete, cutting off pouring and riser systems.
Embodiment 3:
A kind of process of combination silica solution quartz sand and gypsum mould mixture shell, comprising the following steps:
Step 1: equably applying silica solution in ready-made wax-pattern group, quartz sand is then uniformly sprayed, the above step is repeated after air-drying
Hollow type shell is obtained using steam dewaxing legal system after rapid 4 times -5 times；
Step 2: gesso, wrought aluminum vanadine powder and purification mullite sand are weighed, measurement error≤0.5kg during weighing,
It is added in batch mixer according to the sequence of gesso, wrought aluminum vanadine powder and purification mullite sand, it is mixed that gypsum is made in stirring 15min
Material is closed, selection pours one layer of weight by gypsum mould mixture and water according to 7:3 with the matched sandbox of shell size, in sandbox bottom
Amount is than the lower layer's mixture mixed, and lower layer's mixture is with a thickness of 50mm；
Step 3: the shell made in step a is put into sandbox, it is packed into sandbox with smashed waste plaster mixture,
Smashed waste plaster mixture particle size is 80 mesh；
Step 4: pouring one layer of upper layer mixed by gypsum mould mixture and water according to the weight ratio of 7:3 at the top of sandbox
Mixture, upper layer mixture is with a thickness of 50mm；
Step 5: sandbox is put into roaster roasting, maturing temperature is 380 DEG C, calcining time 3.5h；
Step 6: moulding by casting after the sandbox after roasting is taken out, pouring temperature is 750 DEG C；
Step 7: being cleared up except case within placement 6 hours or more after casting complete, cutting off pouring and riser systems.
The present invention solves thin-wall special-shaped part and is difficult to fill type in casting process, while being easy again using gypsum type melting mould founding
Generate knob；Such mode guarantees mold-filling capacity and surface smoothness.
A specific embodiment of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.
Claims (8)
1. the process of a kind of combination silica solution quartz sand and gypsum mould mixture shell, it is characterised in that: including following step
It is rapid:
A, shell is made using silica solution quartz sand shell side formula；
B, selection pours one layer by gypsum mould mixture and water according to 7:3's in sandbox bottom with the matched sandbox of shell size
Lower layer's mixture that weight ratio mixes；
C, the shell made in step a is put into sandbox, is packed into sandbox with smashed waste plaster mixture；
D, one layer is poured at the top of sandbox to be mixed by gypsum mould mixture and water according to the upper layer that the weight ratio of 7:3 mixes
Object；
E, sandbox is put into roaster roasting, maturing temperature is 320 DEG C -380 DEG C, calcining time 2.5h-3.5h；
F, moulding by casting after taking out the sandbox after roasting, pouring temperature are 700 DEG C -750 DEG C；
G, it after casting complete, is cleared up except case within placement 6 hours or more, cuts off pouring and riser systems.
2. the process of combination silica solution quartz sand according to claim 1 and gypsum mould mixture shell, feature
It is: in step a, shell is made using silica solution quartz sand shell side formula, specific as follows:
Silica solution is equably applied in ready-made wax-pattern group, then uniformly sprays quartz sand, is repeated above step 4 times -5 after air-drying
Hollow type shell is obtained using steam dewaxing legal system after secondary.
3. the process of combination silica solution quartz sand according to claim 1 and gypsum mould mixture shell, feature
Be: in step b, lower layer's mixture is with a thickness of 30mm-50mm.
4. the process of combination silica solution quartz sand according to claim 1 and gypsum mould mixture shell, feature
Be: in step b, gypsum mixture prepares specific as follows:
Weigh gesso, wrought aluminum vanadine powder and purification mullite sand, measurement error≤0.5kg during weighing, according to ripe
The sequence of land plaster, wrought aluminum vanadine powder and purification mullite sand is added in batch mixer, and it is mixed that gypsum is made in stirring 10min-15min
Close material.
5. the process of combination silica solution quartz sand according to claim 1 and gypsum mould mixture shell, feature
Be: in step c, smashed waste plaster mixture particle size is -80 mesh of 70 mesh.
6. the process of combination silica solution quartz sand according to claim 1 and gypsum mould mixture shell, feature
Be: in step d, the upper layer mixture is with a thickness of 30mm-50mm.
7. the process of combination silica solution quartz sand according to claim 1 and gypsum mould mixture shell, feature
Be: in step e, maturing temperature is 350 DEG C, calcining time 3h.
8. the process of combination silica solution quartz sand according to claim 1 and gypsum mould mixture shell, feature
Be: in step f, pouring temperature is 720 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811649881.4A CN109622889A (en) | 2018-12-31 | 2018-12-31 | In conjunction with the process of silica solution quartz sand and gypsum mould mixture shell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811649881.4A CN109622889A (en) | 2018-12-31 | 2018-12-31 | In conjunction with the process of silica solution quartz sand and gypsum mould mixture shell |
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| CN109622889A true CN109622889A (en) | 2019-04-16 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110842143A (en) * | 2019-12-12 | 2020-02-28 | 成都新航工业科技有限公司 | Wax pattern fixing method for investment casting |
| CN111036843A (en) * | 2019-12-25 | 2020-04-21 | 青田保俐铸造有限公司 | Improved preparation process of investment casting shell-making cavity |
| CN111730029A (en) * | 2020-07-02 | 2020-10-02 | 连云港源钰金属制品有限公司 | Precision casting method based on 3D printing |
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| CN87100343A (en) * | 1987-01-17 | 1988-04-06 | 哈尔滨工业大学 | The manufacture method of fusible pattern plaster mold and coating |
| CN102397980A (en) * | 2011-10-24 | 2012-04-04 | 华中科技大学 | Gypsum mold formula for casting magnesium alloy and preparation method thereof |
| CN103111585A (en) * | 2013-02-04 | 2013-05-22 | 中国兵器工业第五九研究所 | Method for preparing ceramic gypsum composite mould by using magnesium alloy |
| CN104209497A (en) * | 2014-09-10 | 2014-12-17 | 山西银光华盛镁业股份有限公司 | Plaster casting method for large-sized complex thin-walled magnesium alloy part |
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| CN107745077A (en) * | 2017-09-29 | 2018-03-02 | 西安交通大学 | Core shell one gypsum mold molding methods based on photocureable rapid shaping |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110842143A (en) * | 2019-12-12 | 2020-02-28 | 成都新航工业科技有限公司 | Wax pattern fixing method for investment casting |
| CN111036843A (en) * | 2019-12-25 | 2020-04-21 | 青田保俐铸造有限公司 | Improved preparation process of investment casting shell-making cavity |
| CN111036843B (en) * | 2019-12-25 | 2021-06-01 | 青田保俐铸造有限公司 | Improved preparation process of investment casting shell-making cavity |
| CN111730029A (en) * | 2020-07-02 | 2020-10-02 | 连云港源钰金属制品有限公司 | Precision casting method based on 3D printing |
| CN111730029B (en) * | 2020-07-02 | 2022-04-12 | 连云港源钰金属制品有限公司 | Precision casting method based on 3D printing |
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Application publication date: 20190416 |
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