CA1093276A - Mass for production of cores and casting moulds - Google Patents
Mass for production of cores and casting mouldsInfo
- Publication number
- CA1093276A CA1093276A CA264,229A CA264229A CA1093276A CA 1093276 A CA1093276 A CA 1093276A CA 264229 A CA264229 A CA 264229A CA 1093276 A CA1093276 A CA 1093276A
- Authority
- CA
- Canada
- Prior art keywords
- masses
- moulding composition
- parts
- alkaline metal
- dextrin
- Prior art date
- 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.)
- Expired
Links
- 238000005266 casting Methods 0.000 title claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 238000000465 moulding Methods 0.000 claims abstract description 27
- 239000000203 mixture Substances 0.000 claims abstract description 24
- 239000011230 binding agent Substances 0.000 claims abstract description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000006004 Quartz sand Substances 0.000 claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 6
- 229910000000 metal hydroxide Inorganic materials 0.000 claims abstract description 5
- 150000004692 metal hydroxides Chemical class 0.000 claims abstract description 5
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims abstract description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical group [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 20
- 229920001353 Dextrin Polymers 0.000 claims description 11
- 239000004375 Dextrin Substances 0.000 claims description 11
- 235000019425 dextrin Nutrition 0.000 claims description 11
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 10
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 9
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 8
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims 3
- 239000002904 solvent Substances 0.000 abstract description 7
- 238000007598 dipping method Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 239000004576 sand Substances 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 235000019198 oils Nutrition 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- 229920001807 Urea-formaldehyde Polymers 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 239000001293 FEMA 3089 Substances 0.000 description 1
- 241000218680 Pinus banksiana Species 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 229940000425 combination drug Drugs 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000010665 pine oil Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
Landscapes
- Mold Materials And Core Materials (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
Moulding composition or masses for production of cores and casting moulds comprising 100 parts by weight of grain base, particularly quartz sand, 0.5-30 parts of alkaline metal hydroxides, 1-40 parts of alkaline metal carbonates, 1-15 parts of water as well as 0.2-10 of known hydrophilic binders. The moulding composition or masses according to the invention is removed from the cast or mould by subjecting the core in the cast or mould to the action of solvent, particularly water, preferably by dipping.
Moulding composition or masses for production of cores and casting moulds comprising 100 parts by weight of grain base, particularly quartz sand, 0.5-30 parts of alkaline metal hydroxides, 1-40 parts of alkaline metal carbonates, 1-15 parts of water as well as 0.2-10 of known hydrophilic binders. The moulding composition or masses according to the invention is removed from the cast or mould by subjecting the core in the cast or mould to the action of solvent, particularly water, preferably by dipping.
Description
The invention relates to a novel moulding composition or masses for production of cores and casting moulds.
Moulding compositions or masses according to the invention finds its application in production of casting cores and moulds by methods known to the foundry industry.
Core sands and moulding sands, generally applied in the industry, are most often produced from quartz sand as well as binding agents. Binding agents can be of various types, e.g.
traditional oils, starches, clay and different combinations, such as urea-formaldehyde resin possibly stabilized with amines or phenol-formaldehyde-furfuryl resin. As a binder there have been known coal slime as well as mixture of water glass with urea resin and kaolin. From among binders having the character of oils there have been known e.g. pine oil with addition of paste starch or dextrin, vegetable oils or organic solvents possibly turpentine oil with resin-fatty acids as well as combinations of solid products of oxidation of drying oils and elemental sulphur.
There has also been known a binding agent for cores and casting moulds comprising per 100 parts by weight 50-30 parts by weight of bentonite, 50-80 parts of Portland cement, 3-12 parts of sodium carbonate, 1.5-6.5 parts of hydrated lime and 0.5-2 parts of aluminium hydroxide. The considerable variety of binders added to the grain base indicates how extremely important their proper selection is, since both further treatment of the masses e.g. hardening of cores and moulds made of it, as well as mechanical and technological properties depend on the type of binder used. Some of the hitherto applied binding agents are ~" ,~ -- 1 --l~g3276 expensive, low efficient or require a long time to harden in the core and moulding sand. Cores and moulds produced from the known masses are characterized either by a small abrasion resistance or are very difficult to remove, particularly cores.
The hitherto applied methods of removing cores from castings consist of a mechanical shaking-out by means of e.g. grating shake-out, pneumatic jumpers and other devices. These methods produce noise and dusting in the air of the foundry. Moreover all core sands and some moulding sands presently used cannot be recycled and are discarded, since their regeneration by existing methods is unprofitable.
The present invention is aimed at elimination of the disadvantages of known core and moulding sands by providing novel compositions, so that cores and moulds made from them reveal high abrasion resistance and can be easily removed by non-mechanical means at minimum cost without creating a noise problem or putting dust in the air.
Moulding compositions or masses for production of cores and casting moulds according to the invention comprises per 100 parts by weight of grain base, quartz sand, 0.5-30 parts of alkaline metal hydroxides, preferably sodium hydroxide and/or potassium hydroxide, 1-40 parts of alkaline metal carbon-ates, preferably sodium carbonate and/or potassium carbonate, 1-15 parts of water as well as 0.2-10 parts of known hydrophilic binders, preferably dextrin. Cores and moulds produced from the masses according to the invention, as the conducted tests prove, reveal high abrasion resistance and are durable for a
Moulding compositions or masses according to the invention finds its application in production of casting cores and moulds by methods known to the foundry industry.
Core sands and moulding sands, generally applied in the industry, are most often produced from quartz sand as well as binding agents. Binding agents can be of various types, e.g.
traditional oils, starches, clay and different combinations, such as urea-formaldehyde resin possibly stabilized with amines or phenol-formaldehyde-furfuryl resin. As a binder there have been known coal slime as well as mixture of water glass with urea resin and kaolin. From among binders having the character of oils there have been known e.g. pine oil with addition of paste starch or dextrin, vegetable oils or organic solvents possibly turpentine oil with resin-fatty acids as well as combinations of solid products of oxidation of drying oils and elemental sulphur.
There has also been known a binding agent for cores and casting moulds comprising per 100 parts by weight 50-30 parts by weight of bentonite, 50-80 parts of Portland cement, 3-12 parts of sodium carbonate, 1.5-6.5 parts of hydrated lime and 0.5-2 parts of aluminium hydroxide. The considerable variety of binders added to the grain base indicates how extremely important their proper selection is, since both further treatment of the masses e.g. hardening of cores and moulds made of it, as well as mechanical and technological properties depend on the type of binder used. Some of the hitherto applied binding agents are ~" ,~ -- 1 --l~g3276 expensive, low efficient or require a long time to harden in the core and moulding sand. Cores and moulds produced from the known masses are characterized either by a small abrasion resistance or are very difficult to remove, particularly cores.
The hitherto applied methods of removing cores from castings consist of a mechanical shaking-out by means of e.g. grating shake-out, pneumatic jumpers and other devices. These methods produce noise and dusting in the air of the foundry. Moreover all core sands and some moulding sands presently used cannot be recycled and are discarded, since their regeneration by existing methods is unprofitable.
The present invention is aimed at elimination of the disadvantages of known core and moulding sands by providing novel compositions, so that cores and moulds made from them reveal high abrasion resistance and can be easily removed by non-mechanical means at minimum cost without creating a noise problem or putting dust in the air.
Moulding compositions or masses for production of cores and casting moulds according to the invention comprises per 100 parts by weight of grain base, quartz sand, 0.5-30 parts of alkaline metal hydroxides, preferably sodium hydroxide and/or potassium hydroxide, 1-40 parts of alkaline metal carbon-ates, preferably sodium carbonate and/or potassium carbonate, 1-15 parts of water as well as 0.2-10 parts of known hydrophilic binders, preferably dextrin. Cores and moulds produced from the masses according to the invention, as the conducted tests prove, reveal high abrasion resistance and are durable for a
2 -period of about 4 weeks without decreasing their properties.
After production of cores or moulds from moulding and core sand according to the invention, the core in the casting or mould are subjected to the action of a solvent, particularly water. The preferred method is by dipping e.g. in a tank. The core or mould undergoes spontaneous crumbling within 2-6 minutes.
Cores or moulds, produced from masses according to the invention, under the action of temperature in a mould develop a capacity to absorb solvents. The absorbed solvent destroys bonds within the masses in the core or mould. The removal of cores from castings by this solvent method is extremely simple, inexpensive and safe operation. It does not cause noise or emit dust into the air. The surfaces of castings made by this method are characterized by exceptional cleanliness, free of residual core sand grains. The core and moulding sand when kept in the water or solvent undergo regeneration and can be reused.
The following examples are preferred embodiments of the invention but are not intended to limit the scope of the invention.
Example I. Composition of the masses:
100 kg of quartz sand 1 kg of pale dextrin 6 kg of sodium carbonate 1.5 kg of sodium hydroxide 4.5 kg of water The moulding composition or masses is prepared in a roll mixer. The said mixer is loaded with 100 kg of quartz sand, 'C
1 kg of pale dextrin and 6 kg of sodium carbonate. This com-bination is mixed for 2 minutes. Separately there is prepared a solution comprising 1.5 kg of sodium hydroxide and 4.5 kg of water. This solution is added into the mixer without stopping the mixing. The operation of mixing is continued for a further
After production of cores or moulds from moulding and core sand according to the invention, the core in the casting or mould are subjected to the action of a solvent, particularly water. The preferred method is by dipping e.g. in a tank. The core or mould undergoes spontaneous crumbling within 2-6 minutes.
Cores or moulds, produced from masses according to the invention, under the action of temperature in a mould develop a capacity to absorb solvents. The absorbed solvent destroys bonds within the masses in the core or mould. The removal of cores from castings by this solvent method is extremely simple, inexpensive and safe operation. It does not cause noise or emit dust into the air. The surfaces of castings made by this method are characterized by exceptional cleanliness, free of residual core sand grains. The core and moulding sand when kept in the water or solvent undergo regeneration and can be reused.
The following examples are preferred embodiments of the invention but are not intended to limit the scope of the invention.
Example I. Composition of the masses:
100 kg of quartz sand 1 kg of pale dextrin 6 kg of sodium carbonate 1.5 kg of sodium hydroxide 4.5 kg of water The moulding composition or masses is prepared in a roll mixer. The said mixer is loaded with 100 kg of quartz sand, 'C
1 kg of pale dextrin and 6 kg of sodium carbonate. This com-bination is mixed for 2 minutes. Separately there is prepared a solution comprising 1.5 kg of sodium hydroxide and 4.5 kg of water. This solution is added into the mixer without stopping the mixing. The operation of mixing is continued for a further
3-4 minutes.
From the prepared moulding composition or masses there is produced by the known methods, a core consisting of inner shapes of the head. The core is hardened by blowing in a core box for 15-30 seconds with carbon dioxide. To the tank filled with water there is inserted a cast of the head, produced from the aluminium alloy together with a core reproducing the inner shape of the head. After 5 minutes of maintaining the head and core in the water there occurs a complete crumbling of the core and the cast is taken out of the tank. The core sand remaining in the tank will be separated from the binding agent.
Thus the cast does not require further any cleaning of the inner surfaces.
Example II. Composition of masses:
100 kg of quartz sand 1 kg of pale dextrin 10 kg of sodium carbonate 3 kg of sodium hydroxide 5 kg of water The masses is prepared as in the Example I.
' ~-o 10932~76 In the table below there are presented properties of the core and moulding sand according to the invention. The given properties relate to top and lower values for the quoted examples.
10932~76 A 3 J o ~ o ~1 ,D
~ ~ l l l O ~ C) U~ ~ ~ o a.) ~ ~ ~ ~
¢ ~ ~
o ~ o S~ o o ~ o ¢~
_~ O r- O O
a) ~ o ~ ~1 o ¢~
o-S~ oo I~ o ¢~ O t~3 ~D O
.
~ o ~ o ~ ~d cr. ~ o~ ~1 f~ o ~ U~ o ¢ ¢4~0 __ ~ o b4 ~ O ~
,~ ~ ~ oo U~
~ h t~) ~ ~`J o ¢~
a>
U~ ~ ~ ~ ~ ., .~ U~ ~ ~ .C
u~ ~ ~ ~0 ~ ~ a~ ~ ~ ,~
~ ~ 7 ~ ~ ~ ~ ~
a) s~ ~ ~ ~ ~ ~ ~ a~
~ ~ a) ~ a~ ~ a~ ~ t~
O ~ ~ ^ ~ S~ ^ i~ h ^ 5~
o ~ c~ ~ ~ ~4 ~ ~ ~ a~ ^
~ c~ ~n ~ p~ E~ ~ ~
_ _ .
h ~
O
The content of hydroxides and carbonates has a sub-stantial influence on the technical properties of the masses.
An increase in these components in the masses improves the technical properties, however, permeability of the masses decreases and the time for crumbling of the masses in solvent is slightly longer.
s 7
From the prepared moulding composition or masses there is produced by the known methods, a core consisting of inner shapes of the head. The core is hardened by blowing in a core box for 15-30 seconds with carbon dioxide. To the tank filled with water there is inserted a cast of the head, produced from the aluminium alloy together with a core reproducing the inner shape of the head. After 5 minutes of maintaining the head and core in the water there occurs a complete crumbling of the core and the cast is taken out of the tank. The core sand remaining in the tank will be separated from the binding agent.
Thus the cast does not require further any cleaning of the inner surfaces.
Example II. Composition of masses:
100 kg of quartz sand 1 kg of pale dextrin 10 kg of sodium carbonate 3 kg of sodium hydroxide 5 kg of water The masses is prepared as in the Example I.
' ~-o 10932~76 In the table below there are presented properties of the core and moulding sand according to the invention. The given properties relate to top and lower values for the quoted examples.
10932~76 A 3 J o ~ o ~1 ,D
~ ~ l l l O ~ C) U~ ~ ~ o a.) ~ ~ ~ ~
¢ ~ ~
o ~ o S~ o o ~ o ¢~
_~ O r- O O
a) ~ o ~ ~1 o ¢~
o-S~ oo I~ o ¢~ O t~3 ~D O
.
~ o ~ o ~ ~d cr. ~ o~ ~1 f~ o ~ U~ o ¢ ¢4~0 __ ~ o b4 ~ O ~
,~ ~ ~ oo U~
~ h t~) ~ ~`J o ¢~
a>
U~ ~ ~ ~ ~ ., .~ U~ ~ ~ .C
u~ ~ ~ ~0 ~ ~ a~ ~ ~ ,~
~ ~ 7 ~ ~ ~ ~ ~
a) s~ ~ ~ ~ ~ ~ ~ a~
~ ~ a) ~ a~ ~ a~ ~ t~
O ~ ~ ^ ~ S~ ^ i~ h ^ 5~
o ~ c~ ~ ~ ~4 ~ ~ ~ a~ ^
~ c~ ~n ~ p~ E~ ~ ~
_ _ .
h ~
O
The content of hydroxides and carbonates has a sub-stantial influence on the technical properties of the masses.
An increase in these components in the masses improves the technical properties, however, permeability of the masses decreases and the time for crumbling of the masses in solvent is slightly longer.
s 7
Claims (13)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A moulding composition or masses for the production of cores and casting moulds consisting of a grain base and binding agent, characterized in that per 100 parts by weight of grain base, it comprises 0.5-30 parts of alkaline metal hydroxides, 1-40 parts of alkaline metal carbonates, 1-15 parts of water and 0.2-10 parts of known hydrophilic binders.
2. A moulding composition or masses as claimed in claim 1 wherein the grain base is quartz sand.
3. A moulding composition or masses as claimed in claim 1 wherein the alkaline metal hydroxide is selected from sodium hydroxide and potassium hydroxide or a combination thereof.
4. A moulding composition or masses as claimed in claim 2 wherein the alkaline metal hydroxide is selected from sodium hydroxide and potassium hydroxide or a combination thereof.
5. A moulding composition or masses as claimed in claim 1 wherein the alkaline metal carbonate is selected from sodium carbonate and potassium carbonate or a combination thereof.
6. A moulding composition or masses as claimed in claim 2 wherein the alkaline metal carbonate is selected from sodium carbonate and potassium carbonate or a combination thereof.
7. A moulding composition or masses as claimed in claim 3 wherein the alkaline metal carbonate is selected from sodium carbonate and potassium carbonate or a combination thereof.
8. A moulding composition or masses as claimed in claim l wherein the hydrophillic binder is dextrin.
9. A moulding composition or masses as claimed in claim 2 wherein the hydrophillic binder is dextrin.
10. A moulding composition or masses as claimed in claim 3 wherein the hydrophillic binder is dextrin.
11. A moulding composition or masses as claimed in claim 5 wherein the hydrophillic binder is dextrin.
12. A moulding composition or masses comprised of 100 kg of quartz sand 1 kg of pale dextrin 6 kg of sodium carbonate 1.5 kg of sodium hydroxide 4.5 kg of water.
13. A moulding composition or masses comprised of 100 kg of quartz sand 1 kg of pale dextrin 10 kg of sodium carbonate 3 kg of sodium hydroxide 5 kg of water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA264,229A CA1093276A (en) | 1976-10-26 | 1976-10-26 | Mass for production of cores and casting moulds |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA264,229A CA1093276A (en) | 1976-10-26 | 1976-10-26 | Mass for production of cores and casting moulds |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1093276A true CA1093276A (en) | 1981-01-13 |
Family
ID=4107133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA264,229A Expired CA1093276A (en) | 1976-10-26 | 1976-10-26 | Mass for production of cores and casting moulds |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1093276A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119390459A (en) * | 2024-10-30 | 2025-02-07 | 中南大学 | Silicon-based ceramic, preparation method and application thereof, and method for removing ceramic core for titanium alloy casting |
-
1976
- 1976-10-26 CA CA264,229A patent/CA1093276A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119390459A (en) * | 2024-10-30 | 2025-02-07 | 中南大学 | Silicon-based ceramic, preparation method and application thereof, and method for removing ceramic core for titanium alloy casting |
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| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |