CN105921679A - Modified ceramic shell mold and manufacturing method thereof - Google Patents

Modified ceramic shell mold and manufacturing method thereof Download PDF

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Publication number
CN105921679A
CN105921679A CN201610315534.2A CN201610315534A CN105921679A CN 105921679 A CN105921679 A CN 105921679A CN 201610315534 A CN201610315534 A CN 201610315534A CN 105921679 A CN105921679 A CN 105921679A
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Prior art keywords
sand
ceramic shell
aggregate
slurry
binding agent
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CN201610315534.2A
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Chinese (zh)
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CN105921679B (en
Inventor
杜忠维
杜厚桥
熊碧
苏茜
余雄
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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
    • B22C1/167—Mixtures of inorganic and organic binding agents
    • 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
    • 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

Abstract

A modified ceramic shell mold is composed of, by weight percent, 75% to 85% of aggregate and 15% to 25% of a binding agent, wherein the aggregate is composed of 70% to 90% of zircon powder, 9% to 29% of zircon sand, 0.05% to 0.1% of magnesia powder, 0.5% to 1.5% of iron oxide powder and 0.05% to 0.1% of carbon fibers, and the binding agent is composed of 55% to 65% of a silica solution, 15% to 25% of ethyl orthosilicate, 15% to 25% of anhydrous alcohol and 0.15% to 0.3% of acidified water. The modified ceramic shell mold has the beneficial effects that through adding of the carbon fibers in the aggregate, the ceramic shell mold roasted in the later period forms dense through micro holes, gas permeability is enhanced, stress concentration is removed, impact of steam pressure to the ceramic shell mold is reduced, crack and delaminating generation is prevented, and casting sand clamping is avoided; through adding of the iron oxide powder, ceramic collapsibility is improved, and a casting is easily cleaned; and a spraying method is adopted, uniformly-mixed ceramic slurry is sprayed to the mold, the ceramic shell mold is good in surface compactness, metal is prevented from permeating into sand, casting burnt-on sand is avoided, and therefore the excellent casting is obtained.

Description

Modified ceramic shell mould and preparation method thereof
Technical field
The present invention relates to Special Processes of Metal Castings technical field in foundry engieering, specifically a kind of modified Ceramic shell mo(u)ld and preparation method thereof, is adapted to surface smoothness required precision high, complex-shaped also In curved surface and be difficult to the art casting such as copper alloy and the preparation of extraordinary foundry goods of machining.
Background technology
Due to the art castings such as copper alloy and the property of extraordinary foundry goods, traditional casting founder In skill, conventional water-glass sand, resin sand manufacture casting mold, though the method is simple to operate, cost is relatively low, But can not meet surface smoothness, required precision is high and complex-shaped and in curved surface, be difficult to The art castings such as the copper alloy of machining and the manufacture of extraordinary foundry goods.
Ceramic mould is with a long history, and manufacture method is multiple.Such as, slurry filling method, cost is the highest, Operation is inconvenient, it is narrower to adapt to.Slurry coats, and effect is preferable, but operating technology difficulty is higher, Operate careless slightly, ceramic surface efflorescence, crackle, delamination, have when foundry goods scab, burning into sand and send out Raw so that foundry goods later stage intractability is big.
Summary of the invention
On the one hand, the invention provides a kind of modified ceramic shell mould, by following percentage by weight Raw material forms: 75--85% aggregate, 15--25% binding agent,
Wherein: aggregate is by 70--90% zirconium English powder, 9--29% zircon sand, 0.05--0.1% magnesium oxide Powder, 0.5-1.5% brown iron oxide, 0.05--0.1% carbon fibre form；
Binding agent is anhydrous by 55--65% Ludox, 15--25% tetraethyl orthosilicate, 15--25% Ethanol, 0.15--0.3% acidifying water form.
Second aspect, the invention provides a kind of modified ceramic shell mould described in first aspect Manufacture method, it specifically comprises the following steps that
(1), each constitutive material in aggregate is weighed according to proportioning, pour in a container and mix Stand-by；
(2), each constitutive material in bonding agent is weighed according to proportioning；First take anhydrous alcohol, Acidifying water is poured into after stirring 2～3min in another container, sequentially adds tetraethyl orthosilicate and stirs Mix 3～5min, after the Ludox of addition 1/2 stirring 3～5min, add 1/2 silicon molten Glue stirs stand-by；
(3), bonding agent prepared by aggregate prepared by selecting step (1) and step (2) Mixing, i.e. ceramic shell mo(u)ld slurry preparation completes, stand-by；
(4) the ceramic shell mo(u)ld slurry, by step (3) prepared loads in pressurized tank, spray It is applied on model, then removes accumulation with hairbrush, fill up omission, make the slurry on model Without piling up, without trickling, and thickness is 1～1.5mm, and spray pressure is 0.6～0.8mpa；
(5), spread on the slurry that zircon sand to the step (4) of one layer of 100--140 mesh sprays, Slurry is covered, then under the conditions of temperature is 0～38 DEG C, spontaneous curing 12～4h, and After solidification, the floating sand on slurry is removed；
(6), repeat step (4), (5), but select the mullite sand of 40--70 mesh to be sprinkling upon On the slurry of spraying；
(7), repeat step (6), but select the mullite sand of 20--40 mesh to be sprinkling upon spraying Slurry on；
(8), water-glass sand filling backing sand is used, after water-glass sand hardens, unpack, Delivery, is incubated after fired ceramic shell mould to 80～120 DEG C of foundry goods to be cast.
Preferably, in step (5), mullite sand replaces zircon sand.
One modified ceramic shell mould of the present invention and preparation method thereof, its advantage is: carbonization in aggregate The interpolation of fiber so that the ceramic shell mo(u)ld of after baking, forms the intensive micropore that penetrates, and strengthens thoroughly Gas, eliminates stress and concentrates, reduce the vapour pressure impact to ceramic shell mo(u)ld, prevents crackle, takes off Layer produces, it is to avoid foundry goods burning into sand；The interpolation of brown iron oxide, improves pottery collapsibility, casting Part is prone to cleaning；Furthermore, use spraying process, the ceramic size of mixing be sprayed into model On, make ceramic shell mo(u)ld surface soundness good, and prevent in metal infiltration sand, it is to avoid foundry goods glues Sand, thus obtain excellent foundry goods.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described
Embodiment one:
One, modified ceramic shell mould is raw-material chooses:
Choose 75% aggregate, 25% binding agent, wherein:
Aggregate by 90% zirconium English powder, 9% zircon sand, 0.05% magnesia powder, 0.9% brown iron oxide, 0.05% carbon fibre composition；
Binding agent by 65% Ludox, 19.85% tetraethyl orthosilicate, 15% anhydrous alcohol, 0.15% acidifying water composition；
Two, the manufacture method of a kind of modified ceramic shell mould, it specifically comprises the following steps that
(1), each constitutive material in aggregate step one chosen is poured into mix in a container and is treated With；
(2) anhydrous alcohol, the acidifying water, step one chosen are poured in another container successively Stirring 3min after, sequentially add tetraethyl orthosilicate stirring 5min, add 1/2 silicon molten Glue stirring 5min, after observation solution is limpid, the Ludox adding 1/2 stirs stand-by；
(3), the bonding agent prepared with step (2) of the aggregate prepared of selecting step (1), Mixing, i.e. ceramic shell mo(u)ld slurry preparation completes, stand-by；
(4) the ceramic shell mo(u)ld slurry, by step (3) prepared loads in pressurized tank, spray It is applied on model, then removes accumulation with hairbrush, fill up omission, make the slurry on model Without piling up, without trickling, and thickness is 1.5mm, and spray pressure is 0.8mpa；
(5), spread on the slurry that zircon sand to the step (4) of one layer of 100--140 mesh sprays, Slurry is covered, then under the conditions of temperature is 38 DEG C, spontaneous curing 4h, and solidification After by slurry floating sand remove；
(6), repeat step (4), (5), but select the mullite sand of 40--70 mesh；
(7), repeat step (6), but select the mullite sand of 20--40 mesh；
(8), water-glass sand filling backing sand is used, after water-glass sand hardens, unpack, Delivery, is incubated after fired ceramic shell mould to 80 DEG C of foundry goods to be cast.
Embodiment two:
One, modified ceramic shell mould is raw-material chooses:
80% aggregate, 20% binding agent, wherein:
Aggregate is by 80% zirconium English powder, 19.35% zircon sand, 0.08% magnesia powder, 0.5% oxidation Iron powder, 0.07% carbon fibre composition；
Binding agent by 59.8% Ludox, 15% tetraethyl orthosilicate, 25% anhydrous alcohol, 0.2% Acidifying water forms；
Two, the manufacture method of a kind of modified ceramic shell mould, it specifically comprises the following steps that
(1), each constitutive material in aggregate step one chosen is poured into mix in a container and is treated With；
(2) anhydrous alcohol, the acidifying water, step one chosen are poured in another container successively After stirring 2.5min, sequentially add tetraethyl orthosilicate stirring 4min, the silicon of addition 1/2 Colloidal sol stirring 4min, observe solution limpid after, add the Ludox of 1/2 and stir and treat With；
(3), the bonding agent prepared with step (2) of the aggregate prepared of selecting step (1), Mixing, i.e. ceramic shell mo(u)ld slurry preparation completes, stand-by；
(4) the ceramic shell mo(u)ld slurry, by step (3) prepared loads in pressurized tank, spray It is applied on model, then removes accumulation with hairbrush, fill up omission, make the slurry on model Without piling up, without trickling, and thickness is 1.2mm, and spray pressure is 0.7mpa；
(5), spread on the slurry that zircon sand to the step (4) of one layer of 100--140 mesh sprays, Slurry is covered, then under the conditions of temperature is 10 DEG C, spontaneous curing 10h, and solidification After by slurry floating sand remove；
(6), repeat step (4), (5), but select the mullite sand of 40--70 mesh；
(7), repeat step (6), but select the mullite sand of 20--40 mesh；
(8), water-glass sand filling backing sand is used, after water-glass sand hardens, unpack, Delivery, is incubated after fired ceramic shell mould to 100 DEG C of foundry goods to be cast.
Embodiment three:
One, modified ceramic shell mould is raw-material chooses:
85% aggregate, 15% binding agent, wherein:
Aggregate by 70% zirconium English powder, 29% zircon sand, 0.1% magnesia powder, 0.8% brown iron oxide, 0.1% carbon fibre composition；
Binding agent by 55% Ludox, 25% tetraethyl orthosilicate, 19.7% anhydrous alcohol, 0.3% Acidifying water forms；
Two, the manufacture method of a kind of modified ceramic shell mould, it specifically comprises the following steps that
(1), each constitutive material in aggregate step one chosen is poured into mix in a container and is treated With；
(2) anhydrous alcohol, the acidifying water, step one chosen are poured in another container successively Stirring 2min after, sequentially add tetraethyl orthosilicate stirring 3min, add 1/2 silicon molten Glue stirring 3min, after observation solution is limpid, the Ludox adding 1/2 stirs stand-by；
(3), bonding agent prepared by aggregate prepared by selecting step (1) and step (2) Mixing, i.e. ceramic shell mo(u)ld slurry preparation completes, stand-by；
(4) the ceramic shell mo(u)ld slurry, by step (3) prepared loads in pressurized tank, spray It is applied on model, then removes accumulation with hairbrush, fill up omission, make the slurry on model Without piling up, without trickling, and thickness is 1mm, and spray pressure is 0.6mpa；
(5), spread on the slurry that zircon sand to the step (4) of one layer of 100--140 mesh sprays, Slurry is covered, then under the conditions of temperature is 20 DEG C, spontaneous curing 8h, and solidification After by slurry floating sand remove；
(6), repeat step (4), (5), but select the mullite sand of 40--70 mesh；
(7), repeat step (6), but select the mullite sand of 20--40 mesh；
(8), water-glass sand filling backing sand is used, after water-glass sand hardens, unpack, Delivery, is incubated after fired ceramic shell mould to 120 DEG C of foundry goods to be cast.
Embodiment four:
One, modified ceramic shell mould is raw-material chooses:
80% aggregate, 20% binding agent, wherein:
Aggregate is by 80% zirconium English powder, 18.3% zircon sand, 0.1% magnesia powder, 1.5% ferrum oxide Powder, 0.1% carbon fibre composition；
Binding agent by 62% Ludox, 18% tetraethyl orthosilicate, 19.85% anhydrous alcohol, 0.15% acidifying water composition；
Two, the manufacture method of a kind of modified ceramic shell mould, it specifically comprises the following steps that
(1), each constitutive material in aggregate step one chosen is poured into mix in a container and is treated With；
(2) anhydrous alcohol, the acidifying water, step one chosen are poured in another container successively Stirring 2min after, sequentially add tetraethyl orthosilicate stirring 4min, add 1/2 silicon molten Glue stirring 5min, after observation solution is limpid, the Ludox adding 1/2 stirs stand-by；
(3), bonding agent prepared by aggregate prepared by selecting step (1) and step (2) Mixing, i.e. ceramic shell mo(u)ld slurry preparation completes, stand-by；
(4) the ceramic shell mo(u)ld slurry, by step (3) prepared loads in pressurized tank, spray It is applied on model, then removes accumulation with hairbrush, fill up omission, make the slurry on model Without piling up, without trickling, and thickness is 1.3mm, and spray pressure is 0.8mpa；
(5) slurry that the mullite sand of one layer of 100--140 mesh sprays, is spread to step (4) On, slurry is covered, then under the conditions of temperature is 0 DEG C, spontaneous curing 12h, and After solidification, the floating sand on slurry is removed；
(6), repeat step (4), (5), but select the mullite sand of 40--70 mesh；
(7), repeat step (6), but select the mullite sand of 20--40 mesh；
(8), water-glass sand filling backing sand is used, after water-glass sand hardens, unpack, Delivery, is incubated after fired ceramic shell mould to 110 DEG C of foundry goods to be cast.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all Within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, Should be included within the scope of the present invention.

Claims (5)

1. a modified ceramic shell mould, comprises the following raw materials by weight percent: 75--85% Aggregate, 15--25% binding agent, it is characterised in that:
Aggregate by 70--90% zirconium English powder, 9--29% zircon sand, 0.05--0.1% magnesia powder, 0.5-1.5% brown iron oxide, 0.05--0.1% carbon fibre form；
Binding agent is anhydrous by 55--65% Ludox, 15--25% tetraethyl orthosilicate, 15--25% Ethanol, 0.15--0.3% acidifying water form.
Modified ceramic shell mould the most according to claim 1, it is characterised in that: aggregate By 90% zirconium English powder, 9% zircon sand, 0.05% magnesia powder, 0.9% brown iron oxide, 0.05% Carbon fibre forms；
Binding agent by 65% Ludox, 19.85% tetraethyl orthosilicate, 15% anhydrous alcohol, 0.15% acidifying water composition.
Modified ceramic shell mould the most according to claim 1, it is characterised in that: aggregate By 80% zirconium English powder, 19.35% zircon sand, 0.08% magnesia powder, 0.5% brown iron oxide, 0.07% Carbon fibre forms；
Binding agent by 59.8% Ludox, 15% tetraethyl orthosilicate, 25% anhydrous alcohol, 0.2% Acidifying water forms.
The manufacture method of modified ceramic shell mould the most according to claim 1, it is characterised in that: Specifically comprise the following steps that
(1), each constitutive material in aggregate is weighed according to proportioning, pour in a container and mix Stand-by；
(2), each constitutive material in bonding agent is weighed according to proportioning；First take anhydrous alcohol, Acidifying water is poured into after stirring 2～3min in another container, sequentially adds tetraethyl orthosilicate and stirs Mix 3～5min, after addition 1/2 Ludox stirring 3～5min, add 1/2 Ludox and stir Mix the most stand-by；
(3), bonding agent prepared by aggregate prepared by selecting step (1) and step (2) Mixing, i.e. ceramic shell mo(u)ld slurry preparation completes, stand-by；
(4) the ceramic shell mo(u)ld slurry, by step (3) prepared loads in pressurized tank, spray It is applied on model, then removes accumulation with hairbrush, fill up omission, make the slurry on model Without piling up, without trickling, and thickness is 1～1.5mm, and spray pressure is 0.6～0.8mpa；
(5), spread on the slurry that zircon sand to the step (4) of one layer of 100--140 mesh sprays, Slurry is covered, then under the conditions of temperature is 0～38 DEG C, spontaneous curing 12～4h, and After solidification, the floating sand on slurry is removed；
(6), repeat step (4), (5), but select the mullite sand of 40--70 mesh；
(7), repeat step (6), but select the mullite sand of 20--40 mesh；
(8), water-glass sand filling backing sand is used, after water-glass sand hardens, unpack, Delivery, is incubated after fired ceramic shell mould to 80～120 DEG C of foundry goods to be cast.
Method the most according to claim 4, it is characterised in that: in step (5), Mo Lai Stone sand replaces zircon sand.
CN201610315534.2A 2016-05-12 2016-05-12 Modified ceramic shell mould and preparation method thereof Expired - Fee Related CN105921679B (en)

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Cited By (8)

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Publication number Priority date Publication date Assignee Title
CN107138684A (en) * 2017-04-11 2017-09-08 中铁宝桥集团有限公司 High manganese steel frog casting mold cavity coating spraying coating process
CN107598076A (en) * 2017-08-01 2018-01-19 安徽霍山科皖特种铸造有限责任公司 A kind of preparation method of model casting ceramic shell silica sol binder
CN108296421A (en) * 2017-10-27 2018-07-20 柳州市柳晶科技股份有限公司 Precoated sand for 3D printing
CN108723295A (en) * 2018-05-23 2018-11-02 内蒙古工业大学 The method of fiber reinforcement gypsum investment shell intensity
CN108941439A (en) * 2018-09-26 2018-12-07 安徽江杰实业有限公司 A kind of foundry sand core material
CN110465620A (en) * 2019-08-30 2019-11-19 中国航发动力股份有限公司 A kind of transfer matic shell coating and preparation method thereof and method of adjustment
CN112640689A (en) * 2021-01-05 2021-04-13 福建省德化鑫东宝瓷业有限公司 Air-permeable ceramic flowerpot and preparation process thereof
CN114867568A (en) * 2019-12-30 2022-08-05 泰州鑫宇精工股份有限公司 Ceramic mold casting material and casting process thereof

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107138684A (en) * 2017-04-11 2017-09-08 中铁宝桥集团有限公司 High manganese steel frog casting mold cavity coating spraying coating process
CN107598076A (en) * 2017-08-01 2018-01-19 安徽霍山科皖特种铸造有限责任公司 A kind of preparation method of model casting ceramic shell silica sol binder
CN108296421A (en) * 2017-10-27 2018-07-20 柳州市柳晶科技股份有限公司 Precoated sand for 3D printing
CN108296421B (en) * 2017-10-27 2020-01-10 柳州市柳晶科技股份有限公司 Precoated sand for 3D printing
CN108723295A (en) * 2018-05-23 2018-11-02 内蒙古工业大学 The method of fiber reinforcement gypsum investment shell intensity
CN108723295B (en) * 2018-05-23 2019-09-06 内蒙古工业大学 The method of fiber reinforcement gypsum investment shell intensity
CN108941439A (en) * 2018-09-26 2018-12-07 安徽江杰实业有限公司 A kind of foundry sand core material
CN110465620A (en) * 2019-08-30 2019-11-19 中国航发动力股份有限公司 A kind of transfer matic shell coating and preparation method thereof and method of adjustment
CN114867568A (en) * 2019-12-30 2022-08-05 泰州鑫宇精工股份有限公司 Ceramic mold casting material and casting process thereof
CN112640689A (en) * 2021-01-05 2021-04-13 福建省德化鑫东宝瓷业有限公司 Air-permeable ceramic flowerpot and preparation process thereof
CN112640689B (en) * 2021-01-05 2023-07-14 福建省德化鑫东宝瓷业有限公司 Breathable ceramic flowerpot and preparation process thereof

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