CN105618677A - Preparation method for environment-friendly casting material - Google Patents

Preparation method for environment-friendly casting material Download PDF

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Publication number
CN105618677A
CN105618677A CN201511008067.0A CN201511008067A CN105618677A CN 105618677 A CN105618677 A CN 105618677A CN 201511008067 A CN201511008067 A CN 201511008067A CN 105618677 A CN105618677 A CN 105618677A
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CN
China
Prior art keywords
sand
wax
pattern
granularity
mullite
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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.)
Pending
Application number
CN201511008067.0A
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Chinese (zh)
Inventor
徐苹
陈衍玲
陈隽颖
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Qingdao Botai Meilian Chemical Technology Co Ltd
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Qingdao Botai Meilian Chemical Technology Co Ltd
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Application filed by Qingdao Botai Meilian Chemical Technology Co Ltd filed Critical Qingdao Botai Meilian Chemical Technology Co Ltd
Priority to CN201511008067.0A priority Critical patent/CN105618677A/en
Publication of CN105618677A publication Critical patent/CN105618677A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C1/00Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C3/00Selection of compositions for coating the surfaces of moulds, cores, or patterns
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/02Sand moulds or like moulds for shaped castings
    • B22C9/04Use of lost patterns
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/20Stack moulds, i.e. arrangement of multiple moulds or flasks

Abstract

The invention discloses a preparation method for an environment-friendly casting material. The preparation method includes the steps of wax mold preparation, surface layer coating preparation, surface sand hanging, back layer coating preparation, back sand hanging, steam dewaxing, roasting and the like. According to the preparation method, fine wood bits and crop straw fibers serve as shell manufacturing materials, so that the using amount of refractory matter is reduced, and environmental protection is facilitated; reasonable matching is adopted, so that the breathability is increased on the premise that the shell strength is guaranteed; and cellular material attapulgite is adopted, so that exhausting is facilitated, the defect of casting air holes is reduced, the rate of finished products is increased, and meanwhile the weight of the mold shell is reduced.

Description

The preparation method of a kind of environmental protection cast material
Technical field
The invention belongs to metal melted module precise casting technology field, especially relate to the preparation method of a kind of environmental protection cast material.
Background technology
Mould precision casting is the casting forming process of a kind of advanced person, it is used for realizing complexity, thin-walled, precision casting is shaped, at accurate jewellery, aircraft engine and other precise forming part aspects have huge advantage, traditional investment precision casting technology makes meltability model (abbreviation fusible pattern) with meltable material (such as wax material), apply the refractory paint that some layers are special thereon, an overall module is formed through dry and hardening, melt from module again and lose fusible pattern thus obtain the mould shell of hollow, then mould shell is carried out high temperature sintering, last pour into a mould melting wherein metal and the method for foundry goods that obtains. at present in the production process of precision-investment casting, multiplex ceramic sand, the mould shell that casting is smashed after terminating also exists molding sand and reclaims difficulty, problem big for environment pollution, therefore, finds a kind of high-performance, the mould shell preparation method of environmental protection is necessary very much.
Summary of the invention
Based on above technical problem, the present invention discloses the preparation method of a kind of environmental protection cast material, it is possible to obtains casting die shell efficiently, and adopts environment-friendly materials, protects environment and re-sources.
The technical scheme that the present invention is complete comprises:
The preparation method of a kind of environmental protection cast material, it is characterised in that, comprise the steps:
(1) prepare wax-pattern, according to the shape being obtained foundry goods prepare corresponding wax-pattern, gating system and be bonded to wax-pattern group, a set of gating system is arranged in pairs or groups four foundry goods;
(2) investment precoat preparation, by thin lapis amiridis, tetraethyl silicate, thin wood chip, propyl carbinol, the obtained investment precoat of Leyden blue mix and blend, described thin lapis amiridis granularity is 300 orders, thin wood chip granularity is 240 orders, and the weight proportion of above-mentioned coating component is: thin lapis amiridis: tetraethyl silicate: thin wood chip: propyl carbinol: Leyden blue=1900:150:150:1.5:2;
(3) vermicelli sand: described wax-pattern group immersed in investment precoat pond, take out subsequently, makes it apply evenly to its surface blowing in rotating condition, and described blow-time is 30s-60s, it is preferable to 40s; Facing sand is spilt in rotating condition subsequently to its surface, described facing sand component is aluminum oxide sand and thin wood chip, weight proportion is aluminum oxide sand: thin wood chip=(10-15): 1, and the granularity of aluminum oxide sand is 80-100 order, and thin wood chip granularity is 160-200 order; The dry 12-18h of the wax-pattern group hanging up properly facing sand will be coated with, it is preferable to 15h;
(4) coating preparation is carried on the back, by attapulgite powder, mullite powder, crop branch fiber, silicate hydrolyzate liquid mix and blend obtained back of the body coating, described attapulgite powder granularity is 240 orders, mullite granularity is 240 orders, crop branch fiber diameter is 2-3mm, silicate hydrolyzate liquid dioxide-containing silica is 20%, and the weight proportion of above-mentioned coating component is: attapulgite powder: mullite powder: crop branch fiber: silicate hydrolyzate liquid=(350-500): (1800-2000): (50-120): (2-4);
(5) hanging back of the body sand, dried wax-pattern group in step (3) immersed in back of the body coating pond, take out subsequently, make it apply evenly to its surface blowing in rotating condition, described blow-time is 40s-80s, it is preferable to 60s; Back of the body sand is spilt in rotating condition subsequently to its surface, described back of the body sand component is mullite meal and crop branch fiber, weight proportion is mullite meal: crop branch fiber=(10-15): 1, the granularity of mullite meal is 40-60 order, and crop branch fiber diameter is 4-6mm; The dry 12-18h of the wax-pattern group hanging up properly back of the body sand will be coated with, it is preferable to 15h;
(6) repeating step (4) and step (5) 2-4 time, until mould thickness of the shell reaches 6-10mm, it is preferable to 8mm, dry after slurry seal;
(7) dried for step (6) slurry seal mould shell is carried out steam dewaxing roasting, furnace cooling, obtain environmental protection cast material.
Hinge structure of the present invention, adopt thin wood chip, crop branch fiber as shell material processed, reduce the usage quantity of refractory materials, be both conducive to environmental protection, and adopt rational proportioning, adding ventilation property under the prerequisite ensureing investment shell intensity, the attapulgite in back of the body coating is porous material, is conducive to exhaust, reduce bleb defect, add yield rate, make mould shell reduce weight, and raw material is easy to get simultaneously.
Embodiment
Below in conjunction with embodiment, the present invention will be further described.
Embodiment 1:
The preparation method of a kind of environmental protection cast material, it is characterised in that, comprise the steps:
(1) prepare wax-pattern, prepare corresponding wax-pattern, gating system, rising head according to the shape being obtained foundry goods, and be bonded to wax-pattern group;
(2) investment precoat preparation, adopt tetraethyl silicate as binding agent, by thin lapis amiridis, tetraethyl silicate, thin wood chip, propyl carbinol, the obtained investment precoat of Leyden blue mix and blend, described thin lapis amiridis granularity is 300 orders, thin wood chip granularity is 240 orders, and the weight proportion of above-mentioned coating component is: thin lapis amiridis: tetraethyl silicate: thin wood chip: propyl carbinol: Leyden blue=1800:140:100:1:2;
(3) vermicelli sand: described wax-pattern group immersed in investment precoat pond, take out subsequently, makes it apply evenly to its surface blowing in rotating condition, and described blow-time is 30s; Spilling facing sand to its surface in rotating condition subsequently, described facing sand is facing sand component is aluminum oxide sand and thin wood chip, and weight proportion is aluminum oxide sand: thin wood chip=10:1, and the granularity of aluminum oxide sand is 80 orders, and thin wood chip granularity is 160 orders; The wax-pattern group drying 12 hanging up properly facing sand will be coated with;
(4) coating preparation is carried on the back, by attapulgite powder, mullite powder, crop branch fiber, silicate hydrolyzate liquid mix and blend obtained back of the body coating, described attapulgite powder granularity is 240 orders, mullite granularity is 240 orders, crop branch fiber diameter is 2-3mm, silicate hydrolyzate liquid dioxide-containing silica is 20%, and the weight proportion of above-mentioned coating component is: attapulgite powder: mullite powder: crop branch fiber: silicate hydrolyzate liquid=350:1800:50:2;
(5) hanging back of the body sand, dried wax-pattern group in step (3) immersed in back of the body coating pond, take out subsequently, make it apply evenly to its surface blowing in rotating condition, described blow-time is 40s-80s; Back of the body sand is spilt in rotating condition subsequently to its surface, described back of the body sand component is mullite meal and crop branch fiber, weight proportion is mullite meal: crop branch fiber=10:1, and the granularity of mullite meal is 40 orders, and crop branch fiber diameter is 4mm; The dry 12h of the wax-pattern group hanging up properly back of the body sand will be coated with;
(6) repeating step (4) and step (5) 2-4 time, until mould thickness of the shell reaches 6mm, dry after slurry seal;
(7) dried for step (6) slurry seal mould shell is carried out steam dewaxing, dewaxing pressure is 0.4MPa, and the dewaxing time is 6min, sends in high temperature resistance furnace, it is warming up to 300 DEG C with the temperature rise rate of 2 DEG C/min, insulation 1.5h, is warming up to 750 DEG C with the temperature rise rate of 6 DEG C/min subsequently, insulation 1.5h, it is warming up to 1100 DEG C subsequently with the temperature rise rate of 2 DEG C/min, insulation 4h, furnace cooling, obtains environmental protection cast material.
Embodiment 2:
The preparation method of a kind of environmental protection cast material, it is characterised in that, comprise the steps:
(1) prepare wax-pattern, prepare corresponding wax-pattern, gating system, rising head according to the shape being obtained foundry goods, and be bonded to wax-pattern group;
(2) investment precoat preparation, adopt tetraethyl silicate as binding agent, by thin lapis amiridis, tetraethyl silicate, thin wood chip, propyl carbinol, the obtained investment precoat of Leyden blue mix and blend, described thin lapis amiridis granularity is 300 orders, thin wood chip granularity is 240 orders, and the weight proportion of above-mentioned coating component is: thin lapis amiridis: tetraethyl silicate: thin wood chip: propyl carbinol: Leyden blue=2000:160:200:2:5;
(3) vermicelli sand: described wax-pattern group immersed in investment precoat pond, take out subsequently, makes it apply evenly to its surface blowing in rotating condition, and described blow-time is 60s; Spilling facing sand to its surface in rotating condition subsequently, described facing sand is facing sand component is aluminum oxide sand and thin wood chip, and weight proportion is aluminum oxide sand: thin wood chip=15:1, and the granularity of aluminum oxide sand is 100 orders, and thin wood chip granularity is 200 orders; The dry 18h of the wax-pattern group hanging up properly facing sand will be coated with;
(4) coating preparation is carried on the back, by attapulgite powder, mullite powder, crop branch fiber, silicate hydrolyzate liquid mix and blend obtained back of the body coating, described attapulgite powder granularity is 240 orders, mullite granularity is 240 orders, crop branch fiber diameter is 3mm, silicate hydrolyzate liquid dioxide-containing silica is 20%, and the weight proportion of above-mentioned coating component is: attapulgite powder: mullite powder: crop branch fiber: silicate hydrolyzate liquid=500:2000:120:4;
(5) hanging back of the body sand, dried wax-pattern group in step (3) immersed in back of the body coating pond, take out subsequently, make it apply evenly to its surface blowing in rotating condition, described blow-time is 80s; Back of the body sand is spilt in rotating condition subsequently to its surface, described back of the body sand component is mullite meal and crop branch fiber, weight proportion is mullite meal: crop branch fiber=15:1, and the granularity of mullite meal is 60 orders, and crop branch fiber diameter is 6mm; The dry 18h of the wax-pattern group hanging up properly back of the body sand will be coated with;
(6) repeating step (4) and step (5) 2-4 time, until mould thickness of the shell reaches 10mm, dry after slurry seal;
(7) dried for step (6) slurry seal mould shell is carried out steam dewaxing, dewaxing pressure is 0.8MPa, and the dewaxing time is 8min, sends in high temperature resistance furnace, it is warming up to 450 DEG C with the temperature rise rate of 4 DEG C/min, insulation 1.5h, is warming up to 800 DEG C with the temperature rise rate of 10 DEG C/min subsequently, insulation 1.5h, it is warming up to 1250 DEG C subsequently with the temperature rise rate of 4 DEG C/min, insulation 4h, furnace cooling, obtains environmental protection cast material.

Claims (1)

1. the preparation method of an environmental protection cast material, it is characterised in that, comprise the steps:
(1) prepare wax-pattern, according to the shape being obtained foundry goods prepare corresponding wax-pattern, gating system and be bonded to wax-pattern group, a set of gating system is arranged in pairs or groups four foundry goods;
(2) investment precoat preparation, by thin lapis amiridis, tetraethyl silicate, thin wood chip, propyl carbinol, the obtained investment precoat of Leyden blue mix and blend, described thin lapis amiridis granularity is 300 orders, thin wood chip granularity is 240 orders, and the weight proportion of above-mentioned coating component is: thin lapis amiridis: tetraethyl silicate: thin wood chip: propyl carbinol: Leyden blue=1900:150:150:1.5:2;
(3) vermicelli sand: described wax-pattern group immersed in investment precoat pond, take out subsequently, makes it apply evenly to its surface blowing in rotating condition, and described blow-time is 30s-60s, it is preferable to 40s; Facing sand is spilt in rotating condition subsequently to its surface, described facing sand component is aluminum oxide sand and thin wood chip, weight proportion is aluminum oxide sand: thin wood chip=(10-15): 1, and the granularity of aluminum oxide sand is 80-100 order, and thin wood chip granularity is 160-200 order; The dry 12-18h of the wax-pattern group hanging up properly facing sand will be coated with, it is preferable to 15h;
(4) coating preparation is carried on the back, by attapulgite powder, mullite powder, crop branch fiber, silicate hydrolyzate liquid mix and blend obtained back of the body coating, described attapulgite powder granularity is 240 orders, mullite granularity is 240 orders, crop branch fiber diameter is 2-3mm, silicate hydrolyzate liquid dioxide-containing silica is 20%, and the weight proportion of above-mentioned coating component is: attapulgite powder: mullite powder: crop branch fiber: silicate hydrolyzate liquid=(350-500): (1800-2000): (50-120): (2-4);
(5) hanging back of the body sand, dried wax-pattern group in step (3) immersed in back of the body coating pond, take out subsequently, make it apply evenly to its surface blowing in rotating condition, described blow-time is 40s-80s, it is preferable to 60s; Back of the body sand is spilt in rotating condition subsequently to its surface, described back of the body sand component is mullite meal and crop branch fiber, weight proportion is mullite meal: crop branch fiber=(10-15): 1, the granularity of mullite meal is 40-60 order, and crop branch fiber diameter is 4-6mm; The dry 12-18h of the wax-pattern group hanging up properly back of the body sand will be coated with, it is preferable to 15h;
(6) repeating step (4) and step (5) 2-4 time, until mould thickness of the shell reaches 6-10mm, it is preferable to 8mm, dry after slurry seal;
(7) dried for step (6) slurry seal mould shell is carried out steam dewaxing roasting, furnace cooling, obtain environmental protection cast material.
CN201511008067.0A 2015-12-29 2015-12-29 Preparation method for environment-friendly casting material Pending CN105618677A (en)

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PCT/CN2016/107863 WO2017114065A1 (en) 2015-12-29 2016-11-30 Method for preparing environmentally friendly casting material

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WO2017114065A1 (en) * 2015-12-29 2017-07-06 张建勋 Method for preparing environmentally friendly casting material
WO2017114078A1 (en) * 2015-12-30 2017-07-06 张建勋 Method for preparing engine component
WO2017114068A1 (en) * 2015-12-29 2017-07-06 张建勋 Environmentally friendly method for preparing automobile engine blade
WO2017114071A1 (en) * 2015-12-29 2017-07-06 张建勋 Method for preparing breathable moulding shell
WO2017114066A1 (en) * 2015-12-29 2017-07-06 张建勋 Environmentally friendly method for preparing automobile engine shell
WO2017114070A1 (en) * 2015-12-29 2017-07-06 张建勋 Environmentally friendly preparation method for automobile booster turbine
WO2017114079A1 (en) * 2015-12-30 2017-07-06 张建勋 Method for preparing automobile supercharging turbine
WO2017114064A1 (en) * 2015-12-29 2017-07-06 张建勋 Method for preparing environmentally friendly fine casting mould shell
CN108655342A (en) * 2018-06-04 2018-10-16 佛山市同鑫智能装备科技有限公司 A kind of preparation facilities and preparation method of environmental protection founding materials
CN110871257A (en) * 2018-08-29 2020-03-10 中国科学院金属研究所 Preparation method and application of graphite activated ceramic surface layer slurry
CN110871259A (en) * 2018-08-29 2020-03-10 中国科学院金属研究所 Preparation method and application of aluminum activated ceramic surface layer slurry

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WO2017114064A1 (en) * 2015-12-29 2017-07-06 张建勋 Method for preparing environmentally friendly fine casting mould shell
WO2017114068A1 (en) * 2015-12-29 2017-07-06 张建勋 Environmentally friendly method for preparing automobile engine blade
WO2017114071A1 (en) * 2015-12-29 2017-07-06 张建勋 Method for preparing breathable moulding shell
WO2017114066A1 (en) * 2015-12-29 2017-07-06 张建勋 Environmentally friendly method for preparing automobile engine shell
WO2017114070A1 (en) * 2015-12-29 2017-07-06 张建勋 Environmentally friendly preparation method for automobile booster turbine
WO2017114065A1 (en) * 2015-12-29 2017-07-06 张建勋 Method for preparing environmentally friendly casting material
WO2017114078A1 (en) * 2015-12-30 2017-07-06 张建勋 Method for preparing engine component
WO2017114079A1 (en) * 2015-12-30 2017-07-06 张建勋 Method for preparing automobile supercharging turbine
CN108655342A (en) * 2018-06-04 2018-10-16 佛山市同鑫智能装备科技有限公司 A kind of preparation facilities and preparation method of environmental protection founding materials
CN110871257A (en) * 2018-08-29 2020-03-10 中国科学院金属研究所 Preparation method and application of graphite activated ceramic surface layer slurry
CN110871259A (en) * 2018-08-29 2020-03-10 中国科学院金属研究所 Preparation method and application of aluminum activated ceramic surface layer slurry
CN110871259B (en) * 2018-08-29 2021-03-26 中国科学院金属研究所 Preparation method and application of aluminum activated ceramic surface layer slurry
CN110871257B (en) * 2018-08-29 2021-03-26 中国科学院金属研究所 Preparation method and application of graphite activated ceramic surface layer slurry

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Application publication date: 20160601