SU501835A1 - A METHOD FOR REMOVING A MODEL COMPOSITION OF A CERAMIC SHAPED FORM IN THE MANUFACTURE OF CASTING ON A MOLDED MODELS1 improving the quality of ceramic shells and sanitary-hygienic working conditions. There is a well-known method of melting a model composition from ceramic shells in liquid Yu media, according to which Which medium for melting, which is simultaneously a heat carrier, is known a composition for removing model material 1 [from ceramic forms, including a mixture of glycols and 15 carbitol. A well-known method is that models are made of a low-melting model material (for example, composition P-3) and collect them in blocks. On the assembled model blocks, apply the required number of layers of a refractory coating based on a binder hydrolyzed solution of ethyl silicate and with them in an exothermic ammonia atmosphere. After the act !! All the layers of the block — o are transported by the condom to the bath for the smelting of models. when heated to a temperature above the melt of the moling composition with a liquid, for example, a mixture of glycols and carbitol, the blocks in this mixture are kept for the time necessary for the complete removal of the models from the cavity, and then the forms are transported to the next operation. The disadvantage of this method is the following: —When using shell forms of glass glass or a hydrolyzed solution of ethyl silicate as a binder, around the shell form, immersed in a model bath, forms with an area with high pH (pH). If the models are melted in high-boiling organic liquids, such as mixtures of glycols and carb'Itol, then at high pH the medium will produce slow-burning tar-like products, which accumulate the oxidation products of the bath material, as well as sand particles, etc. Getting into the internal cavity of the mold, these products cause incomplete burning of combustible during annealing, resulting in the rejection of castings due to insufficient heat, gas shells and clogs. At the time of removing the ceramic shells from the installation, they have a high temperature y (about SO' ^ C) and reduced proch- - Google Patents

A METHOD FOR REMOVING A MODEL COMPOSITION OF A CERAMIC SHAPED FORM IN THE MANUFACTURE OF CASTING ON A MOLDED MODELS1 improving the quality of ceramic shells and sanitary-hygienic working conditions. There is a well-known method of melting a model composition from ceramic shells in liquid Yu media, according to which Which medium for melting, which is simultaneously a heat carrier, is known a composition for removing model material 1 [from ceramic forms, including a mixture of glycols and 15 carbitol. A well-known method is that models are made of a low-melting model material (for example, composition P-3) and collect them in blocks. On the assembled model blocks, apply the required number of layers of a refractory coating based on a binder hydrolyzed solution of ethyl silicate and with them in an exothermic ammonia atmosphere. After the act !! All the layers of the block — o are transported by the condom to the bath for the smelting of models. when heated to a temperature above the melt of the moling composition with a liquid, for example, a mixture of glycols and carbitol, the blocks in this mixture are kept for the time necessary for the complete removal of the models from the cavity, and then the forms are transported to the next operation. The disadvantage of this method is the following: —When using shell forms of glass glass or a hydrolyzed solution of ethyl silicate as a binder, around the shell form, immersed in a model bath, forms with an area with high pH (pH). If the models are melted in high-boiling organic liquids, such as mixtures of glycols and carb'Itol, then at high pH the medium will produce slow-burning tar-like products, which accumulate the oxidation products of the bath material, as well as sand particles, etc. Getting into the internal cavity of the mold, these products cause incomplete burning of combustible during annealing, resulting in the rejection of castings due to insufficient heat, gas shells and clogs. At the time of removing the ceramic shells from the installation, they have a high temperature y (about SO' ^ C) and reduced proch-

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Publication number
SU501835A1
SU501835A1 SU2015734A SU2015734A SU501835A1 SU 501835 A1 SU501835 A1 SU 501835A1 SU 2015734 A SU2015734 A SU 2015734A SU 2015734 A SU2015734 A SU 2015734A SU 501835 A1 SU501835 A1 SU 501835A1
Authority
SU
USSR - Soviet Union
Prior art keywords
composition
model
models
ceramic
melting
Prior art date
Application number
SU2015734A
Other languages
Russian (ru)
Inventor
Юрий Лейбович Перевозкин
Юрий Андреевич Гаюн
Клавдия Васильевна Пониделко
Виталий Филиппович Жарков
Анатолий Арамович Мкртычьян
Михаил Дмитриевич Степанович
Виктор Иванович Могутов
Тодеуш Антонович Школяр
Вадим Михайлович Коган
Original Assignee
Ростовский-на-Дону научно-исследовательский институт технологии машиностроения
Priority date (The priority date 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 date listed.)
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Application filed by Ростовский-на-Дону научно-исследовательский институт технологии машиностроения filed Critical Ростовский-на-Дону научно-исследовательский институт технологии машиностроения
Priority to SU2015734A priority Critical patent/SU501835A1/en
Application granted granted Critical
Publication of SU501835A1 publication Critical patent/SU501835A1/en

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Classifications

    • 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
    • B22C9/043—Removing the consumable pattern

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Mold Materials And Core Materials (AREA)

Claims (1)

ность, что зачастую  вл етс  причиной их разрушени . - При выходе из установки дл ,.аь1иОа&-тёНи  неохлажденных керамических оболочек создаютс  неблагопри тные санитарно-гигиенические услови  дл  работающих (повышенна  влажность воздуха - в случае выплавлени  в гор чей воде; выделение вредных паров - в случае применени  других теплоносителей- расплавленный состав, смесь гликолей и карбитола. Целью изобретени   вл етс  сокраш,ение потерь керамических оболочек, повышение качества их и готовых отливок, а также улучшение санитарно-гигиенических условий труда . Дл  этого предложен способ, по которому керамические оболочковые формы погружают перед выплавлением на 30-60 секунд в жидкость , имеюшую температуру 20-70°С и водородный показатель (рН) -0,5-3,0, а после выплавлени  на 40-120 секунд в жидкость, имеющую температуру 40-70°С. Предварительна  обработка модельных блоков с нанесенным на нйх необходимым количеством слоев оболочковой формы в жидкости , имеющей температуру 20-70°С и водородный показатель (рН) 0,5-3,0, способствует тому, что оболочкова  форма пропитываетс  этой жидкостью и при последующем погружении в ванну выплавлени  предотвращает образование вокруг оболочковой формы зоны с повышенным водородным показателем (рН). Если выплавление моделей производ т в высококип щих органических ж-идкост х, например, в смеси гликолей и карбитола, то така  обработка исключает услови  дл  выделени  из нее трудносгорающнх смолоподобных продуктов и устран ет причины ухудшени  качества оболочковых форм и готовых отливок. Погружение, оболочковых форм, из которых удален модельный состав, в жидкость, имеющую температуру 40-70°С, способствует быстрому их охлаждению и прин тию ими прочностных свойств, достаточных дл  транспортировки на последующие операции без риска разрушени . Кроме того, охлажденные оболочковые формы не выдел ют вредных паров и при их транспортировке вручную исключаетс  опасность получени  ожогов. Формула изобретени  Способ удалени  модельного состава из керамической оболочковой формы в производстве лить  по выплавл емым модел м, включающий выплавление модельного состава в среде органических жидкостей, например , смеси гликолей и карбитола, нагретых до температуры 100-200°С, отличающийс  тем, что, с целью улучшени  качества формы, ускорени  охлаждени  формы, последнюю перед выплавлением модельного состава выдерживают в течение 30-60 секунд в жидкости , и.меющей температуру 20-70°С и водородный показатель (рН) 0,5-3,0, а после выплавлени  модельного состава погружают на 40-120 секунд в воду, нагретую до температуры 40-70°С.that is often the reason for their destruction. - When out of the installation for unaffected ceramic shells, unhealthy sanitary and hygienic conditions are created for workers (increased air humidity — in the case of melting in hot water; release of harmful vapors — in the case of using other heat-transfer agents — the molten composition, a mixture of glycols and carbitol. The aim of the invention is to reduce the loss of ceramic shells, to improve their quality and finished castings, as well as to improve sanitary and hygienic working conditions. whereby ceramic shell molds are immersed before melting for 30-60 seconds in a liquid having a temperature of 20-70 ° C and pH (pH) of -0-3-3.0, and after melting for 40-120 seconds in a liquid, having a temperature of 40-70 ° C. Pre-treatment of model blocks with the required number of layers of the shell form in a liquid, having a temperature of 20-70 ° C and a pH (0.5–3.0), is applied to ensure that the shell the form is impregnated with this liquid and upon subsequent immersion in the smelting bath before averts the formation of a zone around the shell-shaped zone with an elevated pH (pH). If the melting of models is carried out in high-boiling organic liquids, for example, in a mixture of glycols and carbitol, then this treatment eliminates the conditions for the isolation of difficult-burning tar-like products from it and eliminates the reasons for the deterioration in the quality of shell molds and finished castings. Immersion, shell forms, from which the model composition was removed, into a liquid having a temperature of 40-70 ° C, facilitates their rapid cooling and the adoption by them of strength properties sufficient for transportation to subsequent operations without the risk of destruction. In addition, the cooled shell forms do not emit harmful vapors and the risk of burns is eliminated when they are transported manually. The invention The method of removing a model composition from a ceramic shell mold in production is casting according to melted models, including melting the model composition in an environment of organic liquids, for example, a mixture of glycols and carbitol heated to a temperature of 100-200 ° C, characterized in that in order to improve the quality of the mold, accelerate the cooling of the mold, the latter, before melting, the model composition is kept for 30-60 seconds in a liquid that has a temperature of 20-70 ° C and a pH (pH) of 0.5-3.0, and after meltingodelno composition was immersed for 40-120 seconds in water heated to a temperature of 40-70 ° C.
SU2015734A 1974-04-16 1974-04-16 A METHOD FOR REMOVING A MODEL COMPOSITION OF A CERAMIC SHAPED FORM IN THE MANUFACTURE OF CASTING ON A MOLDED MODELS1 improving the quality of ceramic shells and sanitary-hygienic working conditions. There is a well-known method of melting a model composition from ceramic shells in liquid Yu media, according to which Which medium for melting, which is simultaneously a heat carrier, is known a composition for removing model material 1 [from ceramic forms, including a mixture of glycols and 15 carbitol. A well-known method is that models are made of a low-melting model material (for example, composition P-3) and collect them in blocks. On the assembled model blocks, apply the required number of layers of a refractory coating based on a binder hydrolyzed solution of ethyl silicate and with them in an exothermic ammonia atmosphere. After the act !! All the layers of the block — o are transported by the condom to the bath for the smelting of models. when heated to a temperature above the melt of the moling composition with a liquid, for example, a mixture of glycols and carbitol, the blocks in this mixture are kept for the time necessary for the complete removal of the models from the cavity, and then the forms are transported to the next operation. The disadvantage of this method is the following: —When using shell forms of glass glass or a hydrolyzed solution of ethyl silicate as a binder, around the shell form, immersed in a model bath, forms with an area with high pH (pH). If the models are melted in high-boiling organic liquids, such as mixtures of glycols and carb'Itol, then at high pH the medium will produce slow-burning tar-like products, which accumulate the oxidation products of the bath material, as well as sand particles, etc. Getting into the internal cavity of the mold, these products cause incomplete burning of combustible during annealing, resulting in the rejection of castings due to insufficient heat, gas shells and clogs. At the time of removing the ceramic shells from the installation, they have a high temperature y (about SO' ^ C) and reduced proch- SU501835A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU2015734A SU501835A1 (en) 1974-04-16 1974-04-16 A METHOD FOR REMOVING A MODEL COMPOSITION OF A CERAMIC SHAPED FORM IN THE MANUFACTURE OF CASTING ON A MOLDED MODELS1 improving the quality of ceramic shells and sanitary-hygienic working conditions. There is a well-known method of melting a model composition from ceramic shells in liquid Yu media, according to which Which medium for melting, which is simultaneously a heat carrier, is known a composition for removing model material 1 [from ceramic forms, including a mixture of glycols and 15 carbitol. A well-known method is that models are made of a low-melting model material (for example, composition P-3) and collect them in blocks. On the assembled model blocks, apply the required number of layers of a refractory coating based on a binder hydrolyzed solution of ethyl silicate and with them in an exothermic ammonia atmosphere. After the act !! All the layers of the block — o are transported by the condom to the bath for the smelting of models. when heated to a temperature above the melt of the moling composition with a liquid, for example, a mixture of glycols and carbitol, the blocks in this mixture are kept for the time necessary for the complete removal of the models from the cavity, and then the forms are transported to the next operation. The disadvantage of this method is the following: —When using shell forms of glass glass or a hydrolyzed solution of ethyl silicate as a binder, around the shell form, immersed in a model bath, forms with an area with high pH (pH). If the models are melted in high-boiling organic liquids, such as mixtures of glycols and carb'Itol, then at high pH the medium will produce slow-burning tar-like products, which accumulate the oxidation products of the bath material, as well as sand particles, etc. Getting into the internal cavity of the mold, these products cause incomplete burning of combustible during annealing, resulting in the rejection of castings due to insufficient heat, gas shells and clogs. At the time of removing the ceramic shells from the installation, they have a high temperature y (about SO' ^ C) and reduced proch-

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU2015734A SU501835A1 (en) 1974-04-16 1974-04-16 A METHOD FOR REMOVING A MODEL COMPOSITION OF A CERAMIC SHAPED FORM IN THE MANUFACTURE OF CASTING ON A MOLDED MODELS1 improving the quality of ceramic shells and sanitary-hygienic working conditions. There is a well-known method of melting a model composition from ceramic shells in liquid Yu media, according to which Which medium for melting, which is simultaneously a heat carrier, is known a composition for removing model material 1 [from ceramic forms, including a mixture of glycols and 15 carbitol. A well-known method is that models are made of a low-melting model material (for example, composition P-3) and collect them in blocks. On the assembled model blocks, apply the required number of layers of a refractory coating based on a binder hydrolyzed solution of ethyl silicate and with them in an exothermic ammonia atmosphere. After the act !! All the layers of the block — o are transported by the condom to the bath for the smelting of models. when heated to a temperature above the melt of the moling composition with a liquid, for example, a mixture of glycols and carbitol, the blocks in this mixture are kept for the time necessary for the complete removal of the models from the cavity, and then the forms are transported to the next operation. The disadvantage of this method is the following: —When using shell forms of glass glass or a hydrolyzed solution of ethyl silicate as a binder, around the shell form, immersed in a model bath, forms with an area with high pH (pH). If the models are melted in high-boiling organic liquids, such as mixtures of glycols and carb'Itol, then at high pH the medium will produce slow-burning tar-like products, which accumulate the oxidation products of the bath material, as well as sand particles, etc. Getting into the internal cavity of the mold, these products cause incomplete burning of combustible during annealing, resulting in the rejection of castings due to insufficient heat, gas shells and clogs. At the time of removing the ceramic shells from the installation, they have a high temperature y (about SO' ^ C) and reduced proch-

Publications (1)

Publication Number Publication Date
SU501835A1 true SU501835A1 (en) 1976-02-05

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SU2015734A SU501835A1 (en) 1974-04-16 1974-04-16 A METHOD FOR REMOVING A MODEL COMPOSITION OF A CERAMIC SHAPED FORM IN THE MANUFACTURE OF CASTING ON A MOLDED MODELS1 improving the quality of ceramic shells and sanitary-hygienic working conditions. There is a well-known method of melting a model composition from ceramic shells in liquid Yu media, according to which Which medium for melting, which is simultaneously a heat carrier, is known a composition for removing model material 1 [from ceramic forms, including a mixture of glycols and 15 carbitol. A well-known method is that models are made of a low-melting model material (for example, composition P-3) and collect them in blocks. On the assembled model blocks, apply the required number of layers of a refractory coating based on a binder hydrolyzed solution of ethyl silicate and with them in an exothermic ammonia atmosphere. After the act !! All the layers of the block — o are transported by the condom to the bath for the smelting of models. when heated to a temperature above the melt of the moling composition with a liquid, for example, a mixture of glycols and carbitol, the blocks in this mixture are kept for the time necessary for the complete removal of the models from the cavity, and then the forms are transported to the next operation. The disadvantage of this method is the following: —When using shell forms of glass glass or a hydrolyzed solution of ethyl silicate as a binder, around the shell form, immersed in a model bath, forms with an area with high pH (pH). If the models are melted in high-boiling organic liquids, such as mixtures of glycols and carb'Itol, then at high pH the medium will produce slow-burning tar-like products, which accumulate the oxidation products of the bath material, as well as sand particles, etc. Getting into the internal cavity of the mold, these products cause incomplete burning of combustible during annealing, resulting in the rejection of castings due to insufficient heat, gas shells and clogs. At the time of removing the ceramic shells from the installation, they have a high temperature y (about SO' ^ C) and reduced proch-

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2509622C1 (en) * 2012-10-18 2014-03-20 Виктор Николаевич Дьячков Method of making refractory shell mould
CN105170950A (en) * 2015-09-25 2015-12-23 无锡环宇精密铸造有限公司 Hydrocooling casting method for precision casting of fired mold

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2509622C1 (en) * 2012-10-18 2014-03-20 Виктор Николаевич Дьячков Method of making refractory shell mould
CN105170950A (en) * 2015-09-25 2015-12-23 无锡环宇精密铸造有限公司 Hydrocooling casting method for precision casting of fired mold

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SU501835A1 (en) A METHOD FOR REMOVING A MODEL COMPOSITION OF A CERAMIC SHAPED FORM IN THE MANUFACTURE OF CASTING ON A MOLDED MODELS1 improving the quality of ceramic shells and sanitary-hygienic working conditions. There is a well-known method of melting a model composition from ceramic shells in liquid Yu media, according to which Which medium for melting, which is simultaneously a heat carrier, is known a composition for removing model material 1 [from ceramic forms, including a mixture of glycols and 15 carbitol. A well-known method is that models are made of a low-melting model material (for example, composition P-3) and collect them in blocks. On the assembled model blocks, apply the required number of layers of a refractory coating based on a binder hydrolyzed solution of ethyl silicate and with them in an exothermic ammonia atmosphere. After the act !! All the layers of the block — o are transported by the condom to the bath for the smelting of models. when heated to a temperature above the melt of the moling composition with a liquid, for example, a mixture of glycols and carbitol, the blocks in this mixture are kept for the time necessary for the complete removal of the models from the cavity, and then the forms are transported to the next operation. The disadvantage of this method is the following: —When using shell forms of glass glass or a hydrolyzed solution of ethyl silicate as a binder, around the shell form, immersed in a model bath, forms with an area with high pH (pH). If the models are melted in high-boiling organic liquids, such as mixtures of glycols and carb'Itol, then at high pH the medium will produce slow-burning tar-like products, which accumulate the oxidation products of the bath material, as well as sand particles, etc. Getting into the internal cavity of the mold, these products cause incomplete burning of combustible during annealing, resulting in the rejection of castings due to insufficient heat, gas shells and clogs. At the time of removing the ceramic shells from the installation, they have a high temperature y (about SO' ^ C) and reduced proch-
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