GB696169A - Improvements in or relating to permeable gypsum plaster molds - Google Patents
Improvements in or relating to permeable gypsum plaster moldsInfo
- Publication number
- GB696169A GB696169A GB18312/51A GB1831251A GB696169A GB 696169 A GB696169 A GB 696169A GB 18312/51 A GB18312/51 A GB 18312/51A GB 1831251 A GB1831251 A GB 1831251A GB 696169 A GB696169 A GB 696169A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gypsum
- mould
- per cent
- added
- air bubbles
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
- C04B28/146—Calcium sulfate hemi-hydrate with a specific crystal form alpha-hemihydrate
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00939—Uses not provided for elsewhere in C04B2111/00 for the fabrication of moulds or cores
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
A fully hydrated gypsum mould for casting aluminium, magnesium, &c. has uniformly distributed air bubbles under 0.02in. in diameter, permeability over 20 on the American Foundrymen Society scale and a compressive strength over 50 p.s.i. It is made by slowly mixing gypsum and an aqueous solution of a sulphonated hydrocarbon foaming agent while stirring, agitating while introducing air, further agitating to reduce the size of the air bubbles and pouring into a mould shaped to produce the mould desired. To 1 lb. of calcined gypsum may be added 0.85 lb. of a 0.4 per cent. solution of sodium alkyl naphthalene sulphonate. The first agitation may be effected by a perforated disc rotated at 2,000 r.p.m. and the total agitation should last about 60 seconds. 3 to 50 per cent. of a filler, e.g. talc, asbestos or silica, and up to 1 per cent. of an accelerator or retarder, e.g. terra alba, sodium sulphate, chloride or citrate or citric acid, may be added to the gypsum. After setting, the gypsum mould is extracted and dried at 180 DEG to 240 DEG F. Moulds so produced may be used for casting aluminium alloy blades for torque converters.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US696169XA | 1950-08-12 | 1950-08-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB696169A true GB696169A (en) | 1953-08-26 |
Family
ID=22090124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18312/51A Expired GB696169A (en) | 1950-08-12 | 1951-08-02 | Improvements in or relating to permeable gypsum plaster molds |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB696169A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1107899B (en) * | 1956-05-29 | 1961-05-31 | Morris Bean & Company | Model mass for destructible casting models for precision casting molds |
| EP0451503A2 (en) * | 1990-04-12 | 1991-10-16 | Redco N.V. | Glass fibre-reinforced gypsum panels and process for their manufacture |
| EP0490160A1 (en) * | 1990-12-10 | 1992-06-17 | SICOWA Verfahrenstechnik für Baustoffe GmbH & Co. KG | Process for manufacturing gypsum building materials |
| GB2409423A (en) * | 2003-12-23 | 2005-06-29 | Doncasters Ltd | Metal casting apparatus with low permeability gypsum mould |
| CN113209540A (en) * | 2021-03-31 | 2021-08-06 | 北京欣合盛信息科技有限公司 | Directly-thrown slow-release solid fire preventing and extinguishing material and preparation method thereof |
| CN113582646A (en) * | 2021-06-21 | 2021-11-02 | 北新集团建材股份有限公司 | Light high-strength paper-surface gypsum board and preparation method thereof |
-
1951
- 1951-08-02 GB GB18312/51A patent/GB696169A/en not_active Expired
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1107899B (en) * | 1956-05-29 | 1961-05-31 | Morris Bean & Company | Model mass for destructible casting models for precision casting molds |
| EP0451503A2 (en) * | 1990-04-12 | 1991-10-16 | Redco N.V. | Glass fibre-reinforced gypsum panels and process for their manufacture |
| EP0451503A3 (en) * | 1990-04-12 | 1992-11-19 | Redco N.V. | Glass fibre-reinforced gypsum panels and process for their manufacture |
| EP0490160A1 (en) * | 1990-12-10 | 1992-06-17 | SICOWA Verfahrenstechnik für Baustoffe GmbH & Co. KG | Process for manufacturing gypsum building materials |
| GB2409423A (en) * | 2003-12-23 | 2005-06-29 | Doncasters Ltd | Metal casting apparatus with low permeability gypsum mould |
| GB2409423B (en) * | 2003-12-23 | 2007-04-11 | Doncasters Ltd | Metal casting apparatus and method |
| CN113209540A (en) * | 2021-03-31 | 2021-08-06 | 北京欣合盛信息科技有限公司 | Directly-thrown slow-release solid fire preventing and extinguishing material and preparation method thereof |
| CN113582646A (en) * | 2021-06-21 | 2021-11-02 | 北新集团建材股份有限公司 | Light high-strength paper-surface gypsum board and preparation method thereof |
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