GB641583A - Improvements in or relating to permanent mould casting - Google Patents
Improvements in or relating to permanent mould castingInfo
- Publication number
- GB641583A GB641583A GB2015048A GB2015048A GB641583A GB 641583 A GB641583 A GB 641583A GB 2015048 A GB2015048 A GB 2015048A GB 2015048 A GB2015048 A GB 2015048A GB 641583 A GB641583 A GB 641583A
- Authority
- GB
- United Kingdom
- Prior art keywords
- water
- oxide
- die
- dipping
- casting
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
In casting brass or other copper-zinc alloy in a die, this is coated with a metal oxide reducible to a lower oxide by the molten alloy to prevent adherence of zinc oxide to the die face. Examples of such oxides are manganese dioxide or sesquioxide, trimanganese tetroxide, ferric oxide and triferritetroxide, which may be used singly or mixed with inert diluents. The coating may be applied in water by spraying or dipping. The suspension may also contain dispersing agents, e.g. sulphite cellulose pitch, sulphated long-chain fatty alcohols or alkyl-naphthalene-sulphonates and a lubricant, e.g. graphite. A suitable dressing comprises one part of manganese dioxide to 10 parts of water to which 0.25 to 0.3 parts of a 10 per cent alcoholic solution of tannic acid has been added. After casting, the die may be cooled by dipping in water, to under 250 DEG C., any adhering zinc oxide or metallic particles being removed by brushing and a fresh coating may be sprayed on. Brasses containing up to 3 per cent of lead may be thus cast.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2015048A GB641583A (en) | 1948-07-28 | 1948-07-28 | Improvements in or relating to permanent mould casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2015048A GB641583A (en) | 1948-07-28 | 1948-07-28 | Improvements in or relating to permanent mould casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB641583A true GB641583A (en) | 1950-08-16 |
Family
ID=10141200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2015048A Expired GB641583A (en) | 1948-07-28 | 1948-07-28 | Improvements in or relating to permanent mould casting |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB641583A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011115025A1 (en) * | 2011-10-07 | 2013-04-11 | Ask Chemicals Gmbh | Coating compositions for inorganic casting molds and cores containing salts and their use |
-
1948
- 1948-07-28 GB GB2015048A patent/GB641583A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011115025A1 (en) * | 2011-10-07 | 2013-04-11 | Ask Chemicals Gmbh | Coating compositions for inorganic casting molds and cores containing salts and their use |
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