CN101412076A - A kind of precision casting technique of ceramic shell lost foam - Google Patents

A kind of precision casting technique of ceramic shell lost foam Download PDF

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Publication number
CN101412076A
CN101412076A CNA2008100076931A CN200810007693A CN101412076A CN 101412076 A CN101412076 A CN 101412076A CN A2008100076931 A CNA2008100076931 A CN A2008100076931A CN 200810007693 A CN200810007693 A CN 200810007693A CN 101412076 A CN101412076 A CN 101412076A
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CN
China
Prior art keywords
remove
cast
module
foundry goods
rising head
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Pending
Application number
CNA2008100076931A
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Chinese (zh)
Inventor
杜应流
程裕江
施常坤
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ANHUI YINGLIU CASTING INDUSTRY Co Ltd
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ANHUI YINGLIU CASTING INDUSTRY Co Ltd
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Publication date
Application filed by ANHUI YINGLIU CASTING INDUSTRY Co Ltd filed Critical ANHUI YINGLIU CASTING INDUSTRY Co Ltd
Priority to CNA2008100076931A priority Critical patent/CN101412076A/en
Publication of CN101412076A publication Critical patent/CN101412076A/en
Pending legal-status Critical Current

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Abstract

The present invention relates to a kind of precision casting technique of ceramic shell lost foam, may further comprise the steps: will inject behind the material one step foaming in the mold cavity, adopt spray glue and PUR that its assembly welding is formed module behind the dryness finalization; Module adopts rapidly-dried silica sol system shell, and preroast is put into stove with the module after the preroast and carried out roasting in the shortest time, drain moisture content; Promptly insert the consolidation of finding time in the sandbox after the formwork roasting, steel scrap and steel alloy raw material are placed in the intermediate frequency furnace melt, the molten steel composition is adjusted into the identical material of foundry goods, cast, cooling, after the moulding, remove surperficial residual sand, insert in the heat-treatment furnace after the rising head of foundry goods and ingate remove and heat-treat; Remove cast(ing) surface sand grains and oxide skin, the processing of rising head platform is smooth, removal casting surface defect.Beneficial effect of the present invention is: realized traditional irrealizable Steel Castings of disappearance mold technique; Have very high strength, avoided the problem of easy initiation carburizing and bleb.

Description

A kind of precision casting technique of ceramic shell lost foam
Technical field
The present invention relates to a kind of precision casting technique of ceramic shell lost foam.
Background technology
Traditional lost foam casting claims vacuum full mold casting again, mainly be that the model that foamed plastics is made is imbedded moulding in the dry sand of binder free, it is tight to adopt microseism to add negative pressure, do not having fuse even do not having to pour into liquid metal under the situation of rising head, holding certain negative pressure in casting and the continuation of insurance of process of setting relaying and make the foamed plastics gasification be replaced the formation foundry goods by metal then; Its characteristics be the foundry goods one-shot forming, to the greatest extent a cun precision height, can improve the environmental condition of foundry greatly, easily realize CR production, foundry goods shape, structure are unrestricted, thereby provide the sufficient free degree for goods design.So-called full form casting process, promptly use fusible material (for example wax material or plastics) to make the meltability model, apply the special fireproof coating of several layers thereon, behind super-dry and whole shell of sclerosis formation, from shell, melt model with steam or hot water again, then shell is placed sandbox, around it, fill dry moulding, at last casting mold is put into roaster through high-temperature roasting, casting mold or shell obtain foundry goods in casting molten metal wherein after roasting.But traditional disappearance mold technique generally only is used for the production of ironcasting, and burning polystyrene bubble mould produces CO in the process of burning in the process of steel-casting 2, and then the phenomenon of initiation carburizing and bleb, therefore the carburetting problem after the steel-casting cast is difficult to solve, can't be used for producing steel-casting (containing low carbon stainless steel).
Summary of the invention
The purpose of this invention is to provide a kind of precision casting technique of ceramic shell lost foam, lower with production, the intensity that can't carry out steel-casting that overcomes prior art, cause carburizing and produce the deficiency of bleb easily.
The objective of the invention is to be achieved through the following technical solutions:
A kind of precision casting technique of ceramic shell lost foam may further comprise the steps:
(1) will inject in the mold cavity behind the bead raw and auxiliary material process one step foaming after the assay was approved, under the effect of high-temperature steam, form model by expansion, after model fills part dryness finalization, form the module that constitutes by ceramic powder and Ludox after adopting spray glue and PUR with its assembly welding;
(2) the module surface is coated with hangs up refractory material, after the temperature for the treatment of roaster rises to 1000 ℃, the module after the preroast is put into stove carry out roasting in the shortest time, the more residual moisture content and the thing of getting angry are drained only, avoid forming pore;
(3) promptly insert in the sandbox after the formwork roasting, vacuumize reinforcing, steel scrap and steel alloy raw material are placed in the intermediate frequency furnace melt, in the die cavity in the burned sandbox of molten steel, after cooling off, form the identical foundry goods of die cavity with casting mold;
(4) after molten metal is shaped, the residual sand of removing the surface is to obtain exposed fully needed form of metal, to remove with the high temperature air gun because of rising head, cast gate and the feeding muscle that arts demand is established, after the rising head of foundry goods and ingate remove, it is inserted in the heat-treatment furnace heat-treat;
(5) adopt shot-blasting machine to remove the residual sand grains and the oxide skin of cast(ing) surface, utilize various lathes that the processing of rising head platform is smooth, remove the various defectives of cast(ing) surface, the foundry goods after the finishing is finally detected examination by modes such as polishing, ball blasts.
Beneficial effect of the present invention is: improved the dimensional stability of foundry goods, cut off the carburetting source, thereby realized the production of traditional irrealizable steel-casting of disappearance mold technique; Adopt ceramic powder and Ludox formwork, reduced the number of plies, have high intensity; By burning the foamed polystyrene mould is disappeared, carry out vacuum casting then, overcome casting cycle burning polystyrene bubble mould and produced CO 2Phenomenon, avoided the problem of easy initiation carburizing and bleb.
The specific embodiment
The described precision casting technique of ceramic shell lost foam of the embodiment of the invention may further comprise the steps:
(1) will inject in the mold cavity behind the bead raw and auxiliary material process foaming machine one step foaming after the assay was approved, under the effect of high-temperature steam, form model by expansion, model is implemented in drying box under the condition of control 35 ℃ of temperature, humidity 40% after filling part dryness finalization, form the module that constitutes by ceramic powder and Ludox after adopting spray glue and PUR with its assembly welding, promptly form the model of a complete disappearance mould;
(2) the module surface is coated with hangs up refractory material, to obtain enough intensity, after the temperature for the treatment of roaster rises to 1000 ℃, the module after the preroast is put into stove carry out roasting in the shortest time, again the residual moisture content and the thing of getting angry are drained only, avoid forming pore;
(3) provide condition for the negative pressure casting, then promptly insert in the sandbox after the formwork roasting and protect, according to product specification raw materials such as steel scrap and steel alloy are placed and to melt in the intermediate frequency furnace, molten steel is reached after the chemical analysis of specification and the needed temperature in the die cavity in the burned sandbox of molten steel, after cooling off, form the identical foundry goods of die cavity with casting mold;
(4) after molten metal is shaped, the residual sand of removing the surface is to obtain exposed fully needed form of metal, to remove with the High Temperature Gas burning torch because of rising head, cast gate and the feeding muscle that arts demand is established, after the rising head of foundry goods and ingate remove, it is inserted in the heat-treatment furnace heat-treat;
(5) damage cutter when avoiding processing rising head, adopt shot-blasting machine to remove the residual sand grains and the oxide skin of cast(ing) surface, utilize various lathes that the processing of rising head platform is smooth, to reach needed blank dimension, remove the various defectives of cast(ing) surface by modes such as polishing, ball blasts, as overlap, burr, splashings, iron rust etc., foundry goods after the finishing is finally detected examination, comprise that magnetic detects, infiltration detection, ray detection and Ultrasonic Detection, to reach desired surface quality and inherent quality.

Claims (1)

1, a kind of precision casting technique of ceramic shell lost foam is characterized in that may further comprise the steps:
(1) will inject in the mold cavity behind the bead raw and auxiliary material process one step foaming after the assay was approved, under the effect of high-temperature steam, form model by expansion, after model fills part dryness finalization, form the module that constitutes by ceramic powder and Ludox after adopting spray glue and PUR with its assembly welding;
(2) the module surface is coated with hangs up refractory material, after the temperature for the treatment of roaster rises to 1000 ℃, the module after the preroast is put into kiln roasting, the more residual moisture content and the thing of getting angry are drained only, avoid forming pore;
(3) promptly insert in the sandbox after the formwork roasting, vacuumize before the cast, reinforce form strength, steel scrap and steel alloy raw material are placed in the intermediate frequency furnace melt, in the die cavity in the burned sandbox of molten steel, through cooling off after, form and the identical foundry goods of die cavity of casting mold;
(4) after molten metal is shaped, the residual sand of removing the surface is to obtain exposed fully needed form of metal, to remove with the High Temperature Gas burning torch because of rising head, cast gate and the feeding muscle that arts demand is established, after the rising head of foundry goods and ingate remove, it is inserted in the heat-treatment furnace heat-treat;
(5) adopt shot-blasting machine to remove the residual sand grains and the oxide skin of cast(ing) surface, utilize various lathes that the processing of rising head platform is smooth, remove the various defectives of cast(ing) surface, the foundry goods after the finishing is finally detected examination by modes such as polishing, ball blasts.
CNA2008100076931A 2008-03-07 2008-03-07 A kind of precision casting technique of ceramic shell lost foam Pending CN101412076A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNA2008100076931A CN101412076A (en) 2008-03-07 2008-03-07 A kind of precision casting technique of ceramic shell lost foam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2008100076931A CN101412076A (en) 2008-03-07 2008-03-07 A kind of precision casting technique of ceramic shell lost foam

Publications (1)

Publication Number Publication Date
CN101412076A true CN101412076A (en) 2009-04-22

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102179497A (en) * 2011-04-13 2011-09-14 清华大学 Process for performing casting under negative pressure condition
CN102699279A (en) * 2012-07-02 2012-10-03 安徽应流铸业有限公司 Large-size impeller processing technique in precise casting
CN102921500A (en) * 2012-11-26 2013-02-13 周作护 Crushing roller of roller type high-frequency vibration crusher and manufacturing method thereof
CN103170578A (en) * 2013-03-14 2013-06-26 山东理工大学 Ceramic type precise casting method
CN104043779A (en) * 2014-07-09 2014-09-17 遵义金业机械铸造有限公司 Process method for producing low-carbon casting by using expendable mold
CN104999033A (en) * 2015-07-15 2015-10-28 湖北永浩铸业科技有限公司 Precoated sand shell lost foam precise casting method
CN105855817A (en) * 2016-06-07 2016-08-17 株洲齿轮有限责任公司 Cylindrical finish turning blank special for producing planetary gear and machining method thereof
CN106825411A (en) * 2017-01-17 2017-06-13 四川维珍高新材料有限公司 A kind of super-low carbon stainless steel lost foam casting process
CN107262670A (en) * 2017-06-10 2017-10-20 东风精密铸造有限公司 A kind of ultra-thin fast drying shell side method of precision-investment casting
CN107377878A (en) * 2017-08-04 2017-11-24 国网山东省电力公司临沂供电公司 A kind of evaporative pattern ammeter housing
CN112247070A (en) * 2020-10-10 2021-01-22 安徽省巢湖市宏顺机械铸造有限公司 Machining method of anti-air-hole mechanical casting product
CN112676536A (en) * 2020-12-17 2021-04-20 平遥同妙机车有限公司 Lost foam ceramic cavity shell type casting and casting method thereof

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102179497A (en) * 2011-04-13 2011-09-14 清华大学 Process for performing casting under negative pressure condition
CN102699279A (en) * 2012-07-02 2012-10-03 安徽应流铸业有限公司 Large-size impeller processing technique in precise casting
CN102921500A (en) * 2012-11-26 2013-02-13 周作护 Crushing roller of roller type high-frequency vibration crusher and manufacturing method thereof
CN103170578A (en) * 2013-03-14 2013-06-26 山东理工大学 Ceramic type precise casting method
CN104043779A (en) * 2014-07-09 2014-09-17 遵义金业机械铸造有限公司 Process method for producing low-carbon casting by using expendable mold
CN104999033A (en) * 2015-07-15 2015-10-28 湖北永浩铸业科技有限公司 Precoated sand shell lost foam precise casting method
CN105855817A (en) * 2016-06-07 2016-08-17 株洲齿轮有限责任公司 Cylindrical finish turning blank special for producing planetary gear and machining method thereof
CN106825411A (en) * 2017-01-17 2017-06-13 四川维珍高新材料有限公司 A kind of super-low carbon stainless steel lost foam casting process
CN107262670A (en) * 2017-06-10 2017-10-20 东风精密铸造有限公司 A kind of ultra-thin fast drying shell side method of precision-investment casting
CN107377878A (en) * 2017-08-04 2017-11-24 国网山东省电力公司临沂供电公司 A kind of evaporative pattern ammeter housing
CN112247070A (en) * 2020-10-10 2021-01-22 安徽省巢湖市宏顺机械铸造有限公司 Machining method of anti-air-hole mechanical casting product
CN112676536A (en) * 2020-12-17 2021-04-20 平遥同妙机车有限公司 Lost foam ceramic cavity shell type casting and casting method thereof

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Open date: 20090422