SU899226A1 - Method of preparing binding for casting moulds produced with use of investment patterns - Google Patents
Method of preparing binding for casting moulds produced with use of investment patterns Download PDFInfo
- Publication number
- SU899226A1 SU899226A1 SU772472876A SU2472876A SU899226A1 SU 899226 A1 SU899226 A1 SU 899226A1 SU 772472876 A SU772472876 A SU 772472876A SU 2472876 A SU2472876 A SU 2472876A SU 899226 A1 SU899226 A1 SU 899226A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- strength
- ethyl silicate
- liquid glass
- binder
- preparing
- Prior art date
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- Silicates, Zeolites, And Molecular Sieves (AREA)
- Mold Materials And Core Materials (AREA)
Description
Изобретение относитс к литейному производству, а именно к способам изготовлени св зующего дл литейных форм по выплавл емым модел м.The invention relates to a foundry, in particular, to methods for producing a binder for foundry molds for produced models.
Известно множество способов приготовлени св зующего, основанных на свойстве слабой кремниевой кислоты вытесн етс из щелочных cKJ uKaTOB неорганическими кислотами L--JMany methods are known for the preparation of binder, based on the weak silicic acid property, being expelled from alkaline cKJ uKaTOB with inorganic acids L - J
Однако все эти известные способы предусматривают последующее удаление попутных солей различными приемами.However, all these known methods provide for the subsequent removal of associated salts by various methods.
Наиболее близким к изобретению по технической сущности и достигаемому эффекту вл етс способ приготовлени св зующего дл литейных форм по выплавл емым модел м,включаюмий нейтрализацию разбавленного жидкого стекла минеральной кислотой 2.The closest to the invention in technical essence and the achieved effect is the method of preparing a binder for casting molds according to melted models, including the neutralization of a diluted liquid glass with mineral acid 2.
В излестном способе разбавленное жидкое стекло вливают тонкой струГ;кой в предварительно охлажденный до водный раствор минеральной КИСЛ.ОТЫ, нейтрализованное жидкое стекло смешивают с ацетоном, ввод т поваренную соль и фильтруют, получа в результате ацетоновый раствор кремниевой кислоты, свободный от попутных солей. Процесс этот сложный , требует дополнительного обору довани, . При этом прочность форм до прокаливани достигает всего 18-22 кгс/см, что значительно уступает прочности форм с этилсиликатным св зующим.In the refined method, the diluted liquid glass is poured with a thin struc- ture into the pre-cooled to an aqueous solution of the mineral ACID. The neutralized liquid glass is mixed with acetone, the sodium chloride is added and filtered, resulting in an acetone solution of silicic acid, free of associated salts. This process is complex, requires additional equipment,. At the same time, the strength of the molds before calcination reaches only 18-22 kgf / cm, which is considerably inferior to the strength of the forms with ethyl silicate binder.
Целью изобретени вл етс повышение прочности форм в холодном и гор чем состо нии при упрощении The aim of the invention is to increase the strength of the forms in the cold and hot state while simplifying
10 способа.10 ways.
Указанна цель достигаетс тем, что при осуществлении способа приготовлени св зующего, включакицего нейтрализацию разбавленного жидкого This goal is achieved by the fact that in carrying out the method of preparing the binder, including the neutralization of the diluted liquid
15 стекла минеральной кислотой, в нейтрализованное жидкое стекло дополнительно ввод т этилсиликат и провод т гидролиз, а нейтрализацию раствора жидкого стекла провод т при 15 with mineral acid, ethyl silicate is additionally introduced into the neutralized liquid glass and hydrolysis is carried out, and the neutralization of the liquid glass solution is carried out at
20 введении одной порции неразбавленной кислоты в предварительно охлажденное жидкое стекло.20 injecting one portion of undiluted acid into pre-cooled water glass.
При нейтрализации жидкого стекла. минеральной кислоты с некоторым i. When neutralizing liquid glass. mineral acid with some i.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU772472876A SU899226A1 (en) | 1977-04-11 | 1977-04-11 | Method of preparing binding for casting moulds produced with use of investment patterns |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU772472876A SU899226A1 (en) | 1977-04-11 | 1977-04-11 | Method of preparing binding for casting moulds produced with use of investment patterns |
Publications (1)
Publication Number | Publication Date |
---|---|
SU899226A1 true SU899226A1 (en) | 1982-01-23 |
Family
ID=20703648
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU772472876A SU899226A1 (en) | 1977-04-11 | 1977-04-11 | Method of preparing binding for casting moulds produced with use of investment patterns |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU899226A1 (en) |
-
1977
- 1977-04-11 SU SU772472876A patent/SU899226A1/en active
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