SU140172A1 - Method of making shell molds for precise casting - Google Patents
Method of making shell molds for precise castingInfo
- Publication number
- SU140172A1 SU140172A1 SU684258A SU684258A SU140172A1 SU 140172 A1 SU140172 A1 SU 140172A1 SU 684258 A SU684258 A SU 684258A SU 684258 A SU684258 A SU 684258A SU 140172 A1 SU140172 A1 SU 140172A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- shell molds
- making shell
- precise casting
- casting
- gas permeability
- Prior art date
Links
Description
При производстве точного лить одним из длительных процессов вл етс прокаливание оболочковых форм перед за.чивкоп и; металлом . Этот процесс ведут при 950° в течение б-8 час дл обеспечепи газопроницаемости оболочки и выгорани модельного состава из парафино-стеариновой смеси.In the manufacture of precision casting, one of the long-term processes is the calcination of shell molds in front of the drill and; by metal. This process is carried out at 950 ° for b-8 hours to ensure the gas permeability of the shell and burnout of the model composition of the paraffin-stearin mixture.
Предложенный способ изготовлени оболочковы.ч фop позвол ет исключить процесс прокаливани и увеличить газопроницаемость срормы .The proposed method for the manufacture of shells allows eliminating the calcination process and increasing the gas permeability of the mold.
Дл осуществлени способа в состав известной огнеупорной краски ввод т около ,Ь% технической мочевины (NH2)2CO. Краска наноситс па модель сло ми, затем просушиваетс при 300°. а случае г/еобходимости выплавлени парафино-стеаринового состава моделей--11 зи 600. При просушивании мочевина разлагаетс на СОо и NHs по реакции: (NH2) НаО - 2NH3 + CO2, что содействует образованию пор и, следовательно, получению хорошей газопроницаемости формы.For carrying out the process, about, L% of technical urea (NH2) 2CO is introduced into the composition of the known refractory paint. The paint is applied on the model by layers, then dried at 300 °. In the case of g / paraffin-stearin composition of models, 11 zi 600. When drying, urea decomposes into COO and NHs by the reaction: (NH2) NaO - 2NH3 + CO2, which contributes to the formation of pores and, consequently, good gas permeability of the form.
Применение предложенного способа сокращает процесс изгоговлени оболочковых форм на 4-6 час и, кроме того, позвол ет уменьшить энергозатраты на их производство. Полезность предложенного способа и возможность его применени дл отливки крупногабаритных деталей была отмечена Научно-исследовательским институтом техно чогии автомобильной промышленности.The use of the proposed method reduces the exorcism of shell forms by 4-6 hours and, in addition, reduces the energy consumption for their production. The usefulness of the proposed method and its applicability to the casting of large parts was noted by the Research Institute of Automotive Technology.
Предмет изобретени Subject invention
Способ изготовлени оболочковых форм дл точного лить с применением этилсиликата или жидкого стекла в смеси с кварцевой мукой или другими огнеупорными материалами, отличающийс тем. что, с целью увеличени газопроницаемости н исключени процесса прокаливани формы, ъ состав огнеупорной краски ввод т 1, технической мочевины.A method of making shell molds for precision casting using ethyl silicate or liquid glass mixed with quartz flour or other refractory materials, characterized in that. that, in order to increase gas permeability and exclude the process of calcination of the form, 1 technical urea is added to the composition of the refractory paint.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU684258A SU140172A1 (en) | 1960-10-31 | 1960-10-31 | Method of making shell molds for precise casting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU684258A SU140172A1 (en) | 1960-10-31 | 1960-10-31 | Method of making shell molds for precise casting |
Publications (1)
Publication Number | Publication Date |
---|---|
SU140172A1 true SU140172A1 (en) | 1960-11-30 |
Family
ID=48296199
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU684258A SU140172A1 (en) | 1960-10-31 | 1960-10-31 | Method of making shell molds for precise casting |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU140172A1 (en) |
-
1960
- 1960-10-31 SU SU684258A patent/SU140172A1/en active
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