GB1596442A - Casting of long hollow objects - Google Patents
Casting of long hollow objects Download PDFInfo
- Publication number
- GB1596442A GB1596442A GB493578A GB493578A GB1596442A GB 1596442 A GB1596442 A GB 1596442A GB 493578 A GB493578 A GB 493578A GB 493578 A GB493578 A GB 493578A GB 1596442 A GB1596442 A GB 1596442A
- Authority
- GB
- United Kingdom
- Prior art keywords
- casting
- core
- mould
- carbon rod
- long hollow
- 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
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Description
(54) CASTING OF LONG HOLLOW OBJECTS (71) We, LYDMET LIMITED, a British
Company, of Tutnalls, Lydney, Gloucestershire, formerly Brico Metals Limited, a
British Company, of Tutnalls, Lydney,
Gloucestershire, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: This invention relates to the casting of long hollow objects.
According to this invention a method of casting a long hollow object of cast iron includes the step of locating an extruded carbon rod in a sand mould to form a core, the core and the sand mould defining a cavity surrounding the core and within the mould, then pouring molten iron into said cavity, and allowing it to cool to form an iron casting.
One embodiment of the invention will now be described by way of example, with reference to the accompanying drawing, which shows a camshaft produced in accordance with the present invention.
Referring to the drawing, in the production of an article approximately 500 mm long and 40 mm diameter, such as a camshaft 10, a pair of sand moulds are prepared using a pattern in the normal way to define the external form of the finished casting. The sand moulds will contain any necessary runners. risers or chills as required
Betore the two halves of the mould are joined to form the mould cavity, a core is inserted in the form of a hollow carbon rod.
For a casting of the dimensions described, the carbon rod may be cylindrical and have an outside diameter of 7 mm from end to end. The carbon may be of the type used for carbon arc lamps and sold under the name
Morganite CY9 extruded carbon (Morganite is a Trade mark). The two ends of the core are located in suitable parts of the mould.
Molten iron is then poured into the mould cavity flows round the core, and solidifies.
It has been found that in the manufacture of a long hollow casting as above described, cores made of ceramic material are apt to distort. This distortion is avoided by using a core in the form of a carbon rod. Although a hollow rod has been described, it is possible to use a solid rod.
The carbon rod is removed from the interior of the casting, after the latter has cooled, either by a vibratory impact method or by a rotary grinder, so as to produce a hole 11 from end to end of the camshaft, which is truly cylindrical.
WHAT WE CLAIM IS:
1. A method of casting a long hollow object of cast iron including the step of locating an extruded carbon rod in a sand mould to form a core, the core and the sand mould defining a cavity surrounding the core and within the mould, then pouring molten iron into said cavity, and allowing it to cool to form an iron casting.
2. A method of casting as claimed in claim 1 wherein the carbon rod is removed from the interior of the casting after the latter has cooled.
3. A method as claimed in claims 1 or 2 in which the carbon rod is cylindrical.
4. A method of casting a long hollow object substantially as hereinbefore described.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (4)
1. A method of casting a long hollow object of cast iron including the step of locating an extruded carbon rod in a sand mould to form a core, the core and the sand mould defining a cavity surrounding the core and within the mould, then pouring molten iron into said cavity, and allowing it to cool to form an iron casting.
2. A method of casting as claimed in claim 1 wherein the carbon rod is removed from the interior of the casting after the latter has cooled.
3. A method as claimed in claims 1 or 2 in which the carbon rod is cylindrical.
4. A method of casting a long hollow object substantially as hereinbefore described.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB493578A GB1596442A (en) | 1978-02-07 | 1978-02-07 | Casting of long hollow objects |
FR7902867A FR2416069A1 (en) | 1978-02-07 | 1979-02-05 | PROCESS FOR THE MOLDING OF HOLLOW METAL OBJECTS AND CORES FOR THE APPLICATION OF THIS PROCESS |
DE19792904415 DE2904415A1 (en) | 1978-02-07 | 1979-02-06 | METHOD OF CASTING A HOLLOW BODY AND A CORE THAT CAN BE USED IN CONNECTION WITH IT |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB493578A GB1596442A (en) | 1978-02-07 | 1978-02-07 | Casting of long hollow objects |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1596442A true GB1596442A (en) | 1981-08-26 |
Family
ID=9786630
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB493578A Expired GB1596442A (en) | 1978-02-07 | 1978-02-07 | Casting of long hollow objects |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE2904415A1 (en) |
FR (1) | FR2416069A1 (en) |
GB (1) | GB1596442A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0272471A2 (en) * | 1986-12-15 | 1988-06-29 | EISENGIESSEREI MONFORTS GMBH & CO | Process and mould for manufacturing a cast iron object, and object thus produced |
EP0839990A1 (en) | 1996-11-01 | 1998-05-06 | Roland Klaar | Assembled camshaft |
CN110548835A (en) * | 2019-09-04 | 2019-12-10 | 重庆新红旗缸盖制造有限公司 | Method for preventing cylinder cover from shrinkage porosity |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3532196A1 (en) * | 1985-09-10 | 1987-04-16 | Wizemann Gmbh U Co J | Camshaft and apparatus for its production |
DE3939261A1 (en) * | 1989-11-28 | 1991-05-29 | Audi Ag | Elongated part e.g. connecting rod with core and cast covering - has compression resistant e.g. sintered material core with clamping pins extending into outer steel cover |
US5702628A (en) * | 1992-07-30 | 1997-12-30 | Nemoto; Masaru | Method of fabricating article by using non-sand core and article produced thereby, and core structure |
DE19532040C2 (en) * | 1995-08-31 | 1999-05-27 | Schloemann Siemag Ag | Device for transporting liquid metal in the casting hall of a shaft furnace and method for operating this device |
DE102009024182B3 (en) * | 2009-06-08 | 2011-03-03 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Forming and removing mold or core during casting, e.g. of filigree structures, by forming mold or core containing hollow particles, to be collapsed under pressure after casting |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR644059A (en) * | 1926-11-20 | 1928-10-02 | Esslingen Maschf | Manufacturing process for foundry cores of very small cross section |
DE752026C (en) * | 1942-06-10 | 1953-02-09 | Arthur Monzer | Core for pouring steel bearing shells |
GB1191202A (en) * | 1967-04-01 | 1970-05-13 | Nippon Piston Ring Co Ltd | Method of Producing Cam Shafts and Cam Shafts Produced by Such Method |
DE1809895A1 (en) * | 1967-12-04 | 1969-07-17 | Amsted Ind Inc | Mold core and process for its manufacture |
GB1299901A (en) * | 1969-01-08 | 1972-12-13 | Doulton & Co Ltd | Preformed cores for the casting of group iv transition metals |
IT955226B (en) * | 1971-05-12 | 1973-09-29 | Alcan Aluminiumwerke | EASILY SHAPED PIECES ALLONTA NABILI IN PARTICULAR SOULS FOR FOUNDRY PURPOSES AND PROCESS FOR THE MANUFACTURE AND USE OF THESE PIECES |
DE2259845C2 (en) * | 1972-12-07 | 1984-05-30 | August Läpple GmbH & Co, 7100 Heilbronn | Use of graphite for cores in the manufacture of gray cast iron |
-
1978
- 1978-02-07 GB GB493578A patent/GB1596442A/en not_active Expired
-
1979
- 1979-02-05 FR FR7902867A patent/FR2416069A1/en active Granted
- 1979-02-06 DE DE19792904415 patent/DE2904415A1/en not_active Ceased
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0272471A2 (en) * | 1986-12-15 | 1988-06-29 | EISENGIESSEREI MONFORTS GMBH & CO | Process and mould for manufacturing a cast iron object, and object thus produced |
US4832107A (en) * | 1986-12-15 | 1989-05-23 | Eisengiesserei Monforts Gmbh & Co. | Method of producing a cast-iron element |
EP0272471A3 (en) * | 1986-12-15 | 1990-01-17 | Eisengiesserie Monforts Gmbh & Co | Process and mould for manufacturing a cast iron object, and object thus produced |
US4927688A (en) * | 1986-12-15 | 1990-05-22 | Eisengiesserei Monforts Gmbh & Co. | Cast-iron element |
EP0839990A1 (en) | 1996-11-01 | 1998-05-06 | Roland Klaar | Assembled camshaft |
DE19645112A1 (en) * | 1996-11-01 | 1998-05-14 | Roland Klaar | Built camshaft |
US5992265A (en) * | 1996-11-01 | 1999-11-30 | Eisengiesserei Monforts Gmbh & Co. | Built-up camshaft |
CN110548835A (en) * | 2019-09-04 | 2019-12-10 | 重庆新红旗缸盖制造有限公司 | Method for preventing cylinder cover from shrinkage porosity |
Also Published As
Publication number | Publication date |
---|---|
FR2416069B1 (en) | 1983-01-28 |
DE2904415A1 (en) | 1979-08-09 |
FR2416069A1 (en) | 1979-08-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19940526 |