CA2077187A1 - Cast-in-place iron-based cylinder liners - Google Patents
Cast-in-place iron-based cylinder linersInfo
- Publication number
- CA2077187A1 CA2077187A1 CA 2077187 CA2077187A CA2077187A1 CA 2077187 A1 CA2077187 A1 CA 2077187A1 CA 2077187 CA2077187 CA 2077187 CA 2077187 A CA2077187 A CA 2077187A CA 2077187 A1 CA2077187 A1 CA 2077187A1
- Authority
- CA
- Canada
- Prior art keywords
- aluminum
- grooves
- sleeve
- construction
- low pressure
- 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.)
- Abandoned
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 20
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 56
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 56
- 238000005266 casting Methods 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000010276 construction Methods 0.000 claims abstract description 12
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims abstract description 3
- 238000007373 indentation Methods 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 229910001018 Cast iron Inorganic materials 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000001788 irregular Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/0009—Cylinders, pistons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/0081—Casting in, on, or around objects which form part of the product pretreatment of the insert, e.g. for enhancing the bonding between insert and surrounding cast metal
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Abstract of the Disclosure A cast-in-place liner construction useful in low pressure casting of hollow aluminum parts. The construction has an iron-based cylindrical body with a surface thereof imprinted with a repeating pattern of crossed groups of relief grooves, each groove forming a helix along such surface, the spacing (.20-.30) between such grooves and the depth (.02-.04 inch) of such grooves being uniformly controlled to permit the grooves to act as molten aluminum runners during low pressure casting of the aluminum that facilitates laying-up of the aluminum along the entire surface.
Also, a method of deploying such liner, comprising: (a) imprinting a cylindrical surface of a sleeve designed to interface with cast aluminum thereagainst, the imprinting providing a quilted pattern of shallow crossing grooves (included angle 35-55°) sized and spaced to promote transfer of molten aluminum during low pressure filling of the mold containing such sleeve;
and (b) planting the liner in such mold and introducing aluminum thereagainst at a low pressure to form a desired aluminum casting.
Also, a method of deploying such liner, comprising: (a) imprinting a cylindrical surface of a sleeve designed to interface with cast aluminum thereagainst, the imprinting providing a quilted pattern of shallow crossing grooves (included angle 35-55°) sized and spaced to promote transfer of molten aluminum during low pressure filling of the mold containing such sleeve;
and (b) planting the liner in such mold and introducing aluminum thereagainst at a low pressure to form a desired aluminum casting.
Description
~ ~t~J~J~ ~
CAST-IN-PLACE IRON-BASED CYLINDER LINERS
Backqround of the Invention Technical Field This invention relates to the art of casting inserts in aluminum castings, and more particula~ly to casting-in-place cylinder liners that serve as the interior wall of the piston chambers for internal combustion engines, the casting procedure being carried out by low pressure techniques.
Discussion of the Prior Art The bonding of iron based elements to a surrounding mass of lighter weight metal has been a continuing problem for products that are subject to high operating temperatures such as an aluminum internal combustion engine block having iron-based liners.
The prior art has followed essentially one of two paths for solving the problem: metallurgical bonding or mechanical bonding. Metallurgical bonding, although it is not thoroughly understood, has proved unsuccessful possibly because the lighter weight metal, such as aluminum, has a strong tendency to chill and form an oxide film at the interface in at least some minor zone.
In complex castings, such as aluminum engine blocks having intricately-shaped water jackets and a number of thin-walled cylinder walls, the ability to keep the aluminum at a sufficiently high temperature, at 100% of the interface with a liner, is extremely difficult. As the aluminum fully solidifies, it moves away (shrinks~
and thus delaminates in at least such minor zone. As a result, there is a ~egraded heat transfer characteristic for the block that prevents such technigue from being ; 35 used commercially. At best, there is only ~0-85% lay-up . ~ ~ . ~ .
CAST-IN-PLACE IRON-BASED CYLINDER LINERS
Backqround of the Invention Technical Field This invention relates to the art of casting inserts in aluminum castings, and more particula~ly to casting-in-place cylinder liners that serve as the interior wall of the piston chambers for internal combustion engines, the casting procedure being carried out by low pressure techniques.
Discussion of the Prior Art The bonding of iron based elements to a surrounding mass of lighter weight metal has been a continuing problem for products that are subject to high operating temperatures such as an aluminum internal combustion engine block having iron-based liners.
The prior art has followed essentially one of two paths for solving the problem: metallurgical bonding or mechanical bonding. Metallurgical bonding, although it is not thoroughly understood, has proved unsuccessful possibly because the lighter weight metal, such as aluminum, has a strong tendency to chill and form an oxide film at the interface in at least some minor zone.
In complex castings, such as aluminum engine blocks having intricately-shaped water jackets and a number of thin-walled cylinder walls, the ability to keep the aluminum at a sufficiently high temperature, at 100% of the interface with a liner, is extremely difficult. As the aluminum fully solidifies, it moves away (shrinks~
and thus delaminates in at least such minor zone. As a result, there is a ~egraded heat transfer characteristic for the block that prevents such technigue from being ; 35 used commercially. At best, there is only ~0-85% lay-up . ~ ~ . ~ .
- 2 - ~ J .~ ,i.?~3 7 of the alumlnum along the iron-based liner interface wall.
For metallurginal bonding, intermediate coatings of zinc alloys tsee U.S. patent 2,634,469) have been suggested, but have been economically unsatisfactory for large-scale production of engine blocks.
As a hybrid, some form of mechanical bonding has been attempted by the prior art to add to the resulting metallurgical bond that may be attained. In one example (U.S. patent 3,069,209), the interfacing surface of the casting iron liners has been roughened by spiney protrusions when such liners are initially formed by casting; such protrusions act as longitudinal and circumferential mechanical bonds when aluminum is cast under high pressure (die-cast) therearound. High pressure is always required to move the aluminum across such protrusions and still achieve lay-up of aluminum against the original outer wall of the liner. The machined smooth wall of the liner becomes the valleys between the protrusions. Because of the need for quick high pressure mold filling to prevent premature freezing, such technique is impractical when casting aluminum engine blocks by low pressure (in the range of 2-5 psi), and mold filling times take an average of one-half minute.
In another hybrid example ~U.S. patent 3,401,026), an irregular outer surface of a cast iron liner for an aluminum brake drum was used to augment any cylindxical bond existing by casting the liner in place.
There was no disclosure of the type of irregular surface employed, but there was considerable disclosure as to the need for high sonic vibration of the molten aluminum during casting to create an intensive cavitation field that forces aluminum along the irregular surface to achieve good wetting. Such vibratory apparatus would be impractical for casting an aluminum engine block with a r 3 ~ 7 multiplicity of internal liners.
What is needed is a method that achieves essentially 100% lay-up of the molten aluminum against the outer surface of the iron-based liner cast-in-place within an aluminum block by low pre~sure casting techniques, such method not requiring any extra coatings or special equipment during casting to achieve such result.
Summary of the Invention In a first aspect, the invention is a cast-in-place liner construction useful in low pressure casting of hollow aluminum parts, the construction is characterized by an iron-based cylindrical body having a surface thereof imprinted with a repeating pattern of crossed groups of relief grooves, each groove forming a helix along such surface, the spacing between such grooves and the depth of such grooves being uniformly controlled to permit the grooves to act as rnolten aluminurn runners during low pressure casting of the aluminum that facilitates laying-up of the aluminum along the entire surface.
The grooves advantageously will have a depth in the range of .02-.04 inch; the spacing between grooves is advantageously .20-.30 inch; and a width for each of such grooves in the range of .02-.04 inch. Preferably, the included angle between intersecting groups of grooves is in the range of 35-55. Preferably, the imprinted surface is the outer cylindrical surface of the liner while the inner cylindrical surface thereof is smooth.
A second aspect of this invention is a casting method deploying such liner, the method comprising: (a) imprinting a cylindrical surface of a sleeve that is designed to interface with cast alurninum thereagainst, the imprinting providing a quilted pattern of shallow grooves, such grooves being sized and spaced to promote transfer of molten aluminum during low pressure filling of the mold containing such sleeve; and (b) planting the liner in such mold and introducing aluminum thereagainst at a low pressure to form a desired aluminum casting.
The imprinting may be carried out by machining the prefabricated sleeve or by imprinting indentations in the sleeve during rolling or fabrication of such sleeve.
Brief Description of the Drawin~s The novel features of the invention are set forth with particularity in the appended claims. The invention itself, however, both as to its organization and method of operation, together with further objects and advantages thereof, may best be understood by reference to the following description taken in conjunction with the accompanying drawings, in which:
Figure l is a perspective view of an iron liner embodying the principles of this invention;
Figure 2 is an enlarged view of the groups of grooves taken along the circled zone A of Figure 1;
Figure 3 is an enlarged sectional view taken radially through the wall of the liner; and Figure 4 is a sectional eleYatlonal view of a V-configuration aIuminum block for an internal combustion engine showing the liners cast according to the method of this invention.
Detailed Description and Best Mode Casting in place of iron cylinder liners in an aluminum cylinder block is considered routine when the block is produced by high pressure die cas~in~. Molten metal i5 injected under high pressure and for a short period of time to facilitate the lay up of the aluminum against the iron liner. However, for casting processes such as gravity or low pressure where mold filling occurs over a relatively long period and takes place with little or no pressure, the casting-in-place of liners is considered extremely difficult. This invention provides for a unique quilted pattern of grooving on the surface of the iron liner that is to interface with the aluminum, such pattern promoting the flow of molten aluminum against the iron cylinder bore liner surface to overcome the problem of chilling and accompanying oxide formation.
The iron-based liner 20 has a cylindrical body B
provided with an outer surface 10 and an inner cylindrical surface 11, and a pattern C imprinted onto the outer cylindrical surface 10, which pattern is comprised of crossed groups 12 and 13 of relief grooves 14. The grooves are effective to uniformly act as molten aluminum runners during low pressure casting to facilitate laying-up of the aluminum along the entire cylindrical surface 10.
The grooves create a diamond~shaped pattern as criss-crossed, the lateral spacing 15 between adjacent grooves being on the order of .20-.30 inch, the depth 16 of each of the grooves being in the range of .02-.04 inch, and the width 17 of each of the grooves being desirably in the range of .02-.04 inches. The included angle 18 between intersecting or crossing grooves is in the range of 35-55.
The pattern is imprinted on the outer cylindrical surface by either machining such pattern as the sleeve is rotated, or the pattern may be formed by indentations in the liner during rolling or casting of the liner itself. The grooves in each of the groups are helical about the outer surface of the liner; this is advantageous when placing the liner in an oblique position such as shown in Figure 4 for a V-shaped configuration aluminum block. In such application, one - 6 - ~ J,~
set of grooves will be somewhat horizontal with respect to ~ vertical plane 21 and the other set of grooves will be closer to the vertical plane as they wrap a~ound the outer surface of the liner.
A casting method deploying such liners comprises: (a) imprinting a cylindrical surface of a iron-based sleeve designed to interface with a cast aluminum thereagainst, the sleeve having a quilted pattern of shallow grooves with the grooves sized and spaced to promote transfer of molten aluminum during a low pressure filling of a mold containing the sleeve; and ~b) planting the liner in such mold and introducing aluminum thereagainst at a low pressure to form the desired aluminum casting. The pressure employed in such method is in the range of 2-5 psi and the temperature of the molten aluminum will be in the range of 1275F. Due to the pattern of the grooves and their critical sizing, the molten aluminum will not drop below a fluid temperature during filling of th~ mold and will not prematurely freeze in migrating throughout all of the interstices of the cylindrical surface of the liner.
I the grooves are defined to have a depth in excess of .04 inch, there will be a tendency for the aluminum to fraeze or form a minicus characteristic of problems associated with the prior art. If the depth of the grooves is less than .02, there is little likelihood that a molten aluminum runner effect will be created. If groove spacing is greater than .3 inch, the ability to lay aluminum throughout the normal cylindrical surface is hindered, whereas a spacing between grooves of less than .20 inch will create difficulty in filling all the grooves with molten aluminum because of the lack of pressure driving the aluminum through such an increased maæe of grooves. The ultimate effect of this invention achieves essentially 100% lay-up of aluminum against the 7 -- ~` , 7 ~ 7 the iron-based liner after the completion of the low pressure casting technique. By "lay-up" it is herein meant: the amount of intimate contact between the outer surface of the iron liner and the aluminum barrel that surrounds the liner.
While particular embodiments of the invention have been illustrated and described, it will be obvious to those skilled in the art that various changes and modifications may be made without departing from the invention, and it is intended to co~er in the appended claims all such modifications and equivalents as fall wikhin the true spirit and scope of this invention.
For metallurginal bonding, intermediate coatings of zinc alloys tsee U.S. patent 2,634,469) have been suggested, but have been economically unsatisfactory for large-scale production of engine blocks.
As a hybrid, some form of mechanical bonding has been attempted by the prior art to add to the resulting metallurgical bond that may be attained. In one example (U.S. patent 3,069,209), the interfacing surface of the casting iron liners has been roughened by spiney protrusions when such liners are initially formed by casting; such protrusions act as longitudinal and circumferential mechanical bonds when aluminum is cast under high pressure (die-cast) therearound. High pressure is always required to move the aluminum across such protrusions and still achieve lay-up of aluminum against the original outer wall of the liner. The machined smooth wall of the liner becomes the valleys between the protrusions. Because of the need for quick high pressure mold filling to prevent premature freezing, such technique is impractical when casting aluminum engine blocks by low pressure (in the range of 2-5 psi), and mold filling times take an average of one-half minute.
In another hybrid example ~U.S. patent 3,401,026), an irregular outer surface of a cast iron liner for an aluminum brake drum was used to augment any cylindxical bond existing by casting the liner in place.
There was no disclosure of the type of irregular surface employed, but there was considerable disclosure as to the need for high sonic vibration of the molten aluminum during casting to create an intensive cavitation field that forces aluminum along the irregular surface to achieve good wetting. Such vibratory apparatus would be impractical for casting an aluminum engine block with a r 3 ~ 7 multiplicity of internal liners.
What is needed is a method that achieves essentially 100% lay-up of the molten aluminum against the outer surface of the iron-based liner cast-in-place within an aluminum block by low pre~sure casting techniques, such method not requiring any extra coatings or special equipment during casting to achieve such result.
Summary of the Invention In a first aspect, the invention is a cast-in-place liner construction useful in low pressure casting of hollow aluminum parts, the construction is characterized by an iron-based cylindrical body having a surface thereof imprinted with a repeating pattern of crossed groups of relief grooves, each groove forming a helix along such surface, the spacing between such grooves and the depth of such grooves being uniformly controlled to permit the grooves to act as rnolten aluminurn runners during low pressure casting of the aluminum that facilitates laying-up of the aluminum along the entire surface.
The grooves advantageously will have a depth in the range of .02-.04 inch; the spacing between grooves is advantageously .20-.30 inch; and a width for each of such grooves in the range of .02-.04 inch. Preferably, the included angle between intersecting groups of grooves is in the range of 35-55. Preferably, the imprinted surface is the outer cylindrical surface of the liner while the inner cylindrical surface thereof is smooth.
A second aspect of this invention is a casting method deploying such liner, the method comprising: (a) imprinting a cylindrical surface of a sleeve that is designed to interface with cast alurninum thereagainst, the imprinting providing a quilted pattern of shallow grooves, such grooves being sized and spaced to promote transfer of molten aluminum during low pressure filling of the mold containing such sleeve; and (b) planting the liner in such mold and introducing aluminum thereagainst at a low pressure to form a desired aluminum casting.
The imprinting may be carried out by machining the prefabricated sleeve or by imprinting indentations in the sleeve during rolling or fabrication of such sleeve.
Brief Description of the Drawin~s The novel features of the invention are set forth with particularity in the appended claims. The invention itself, however, both as to its organization and method of operation, together with further objects and advantages thereof, may best be understood by reference to the following description taken in conjunction with the accompanying drawings, in which:
Figure l is a perspective view of an iron liner embodying the principles of this invention;
Figure 2 is an enlarged view of the groups of grooves taken along the circled zone A of Figure 1;
Figure 3 is an enlarged sectional view taken radially through the wall of the liner; and Figure 4 is a sectional eleYatlonal view of a V-configuration aIuminum block for an internal combustion engine showing the liners cast according to the method of this invention.
Detailed Description and Best Mode Casting in place of iron cylinder liners in an aluminum cylinder block is considered routine when the block is produced by high pressure die cas~in~. Molten metal i5 injected under high pressure and for a short period of time to facilitate the lay up of the aluminum against the iron liner. However, for casting processes such as gravity or low pressure where mold filling occurs over a relatively long period and takes place with little or no pressure, the casting-in-place of liners is considered extremely difficult. This invention provides for a unique quilted pattern of grooving on the surface of the iron liner that is to interface with the aluminum, such pattern promoting the flow of molten aluminum against the iron cylinder bore liner surface to overcome the problem of chilling and accompanying oxide formation.
The iron-based liner 20 has a cylindrical body B
provided with an outer surface 10 and an inner cylindrical surface 11, and a pattern C imprinted onto the outer cylindrical surface 10, which pattern is comprised of crossed groups 12 and 13 of relief grooves 14. The grooves are effective to uniformly act as molten aluminum runners during low pressure casting to facilitate laying-up of the aluminum along the entire cylindrical surface 10.
The grooves create a diamond~shaped pattern as criss-crossed, the lateral spacing 15 between adjacent grooves being on the order of .20-.30 inch, the depth 16 of each of the grooves being in the range of .02-.04 inch, and the width 17 of each of the grooves being desirably in the range of .02-.04 inches. The included angle 18 between intersecting or crossing grooves is in the range of 35-55.
The pattern is imprinted on the outer cylindrical surface by either machining such pattern as the sleeve is rotated, or the pattern may be formed by indentations in the liner during rolling or casting of the liner itself. The grooves in each of the groups are helical about the outer surface of the liner; this is advantageous when placing the liner in an oblique position such as shown in Figure 4 for a V-shaped configuration aluminum block. In such application, one - 6 - ~ J,~
set of grooves will be somewhat horizontal with respect to ~ vertical plane 21 and the other set of grooves will be closer to the vertical plane as they wrap a~ound the outer surface of the liner.
A casting method deploying such liners comprises: (a) imprinting a cylindrical surface of a iron-based sleeve designed to interface with a cast aluminum thereagainst, the sleeve having a quilted pattern of shallow grooves with the grooves sized and spaced to promote transfer of molten aluminum during a low pressure filling of a mold containing the sleeve; and ~b) planting the liner in such mold and introducing aluminum thereagainst at a low pressure to form the desired aluminum casting. The pressure employed in such method is in the range of 2-5 psi and the temperature of the molten aluminum will be in the range of 1275F. Due to the pattern of the grooves and their critical sizing, the molten aluminum will not drop below a fluid temperature during filling of th~ mold and will not prematurely freeze in migrating throughout all of the interstices of the cylindrical surface of the liner.
I the grooves are defined to have a depth in excess of .04 inch, there will be a tendency for the aluminum to fraeze or form a minicus characteristic of problems associated with the prior art. If the depth of the grooves is less than .02, there is little likelihood that a molten aluminum runner effect will be created. If groove spacing is greater than .3 inch, the ability to lay aluminum throughout the normal cylindrical surface is hindered, whereas a spacing between grooves of less than .20 inch will create difficulty in filling all the grooves with molten aluminum because of the lack of pressure driving the aluminum through such an increased maæe of grooves. The ultimate effect of this invention achieves essentially 100% lay-up of aluminum against the 7 -- ~` , 7 ~ 7 the iron-based liner after the completion of the low pressure casting technique. By "lay-up" it is herein meant: the amount of intimate contact between the outer surface of the iron liner and the aluminum barrel that surrounds the liner.
While particular embodiments of the invention have been illustrated and described, it will be obvious to those skilled in the art that various changes and modifications may be made without departing from the invention, and it is intended to co~er in the appended claims all such modifications and equivalents as fall wikhin the true spirit and scope of this invention.
Claims (11)
1. A cast-in-place iron-based liner construction useful in low pressure casting of hollow aluminum parts, the construction comprising:
(a) an iron-based cylindrical body having a cylindrical surface imprinted with a repeating pattern of crossed groups of relief grooves, the path of each groove being a helix about said surface, the spacing between said grooves and the depth of said grooves being uniformly controlled to permit the grooves to act as molten aluminum runners during such low pressure casting facilitating laying-up the aluminum along substantially the entirety of said surface.
(a) an iron-based cylindrical body having a cylindrical surface imprinted with a repeating pattern of crossed groups of relief grooves, the path of each groove being a helix about said surface, the spacing between said grooves and the depth of said grooves being uniformly controlled to permit the grooves to act as molten aluminum runners during such low pressure casting facilitating laying-up the aluminum along substantially the entirety of said surface.
2. The construction as in claim 1, in which said grooves each have a depth in the range of .02-.04 inch.
3. The construction as in claim 1, in which said grooves are spaced from each other a distance in the range of .20-.30 inch.
4. The construction as in claim 1, in which the included angle between intersecting groups of grooves is in the range of 35-55°.
5. The construction as in claim 2, in which the width of each of said grooves is in the range of .02-.04 inch.
6. The construction as in claim 1, in which said imprinted surface is the outer cylindrical surface of said liner, and the inner cylindrical surface is smooth.
7. The construction as in claim 1, in which said imprinted pattern achieves a quilted appearance.
8. A method of casting an aluminum cylinder block having cast-in-place iron-based liners, comprising:
(a) imprinting a cylindrical surface on each of a plurality of cast iron-based sleeves, each sleeve being designed to interface with cast aluminum thereagainst, each sleeve having a quilted pattern of shallow grooves sized and spaced apart to promote transfer of molten aluminum during low pressure filling of the mold containing said sleeve; and (b) planting said sleeve in a mold and introducing aluminum thereagainst at a low pressure to form a desired aluminum casting.
(a) imprinting a cylindrical surface on each of a plurality of cast iron-based sleeves, each sleeve being designed to interface with cast aluminum thereagainst, each sleeve having a quilted pattern of shallow grooves sized and spaced apart to promote transfer of molten aluminum during low pressure filling of the mold containing said sleeve; and (b) planting said sleeve in a mold and introducing aluminum thereagainst at a low pressure to form a desired aluminum casting.
9. The method as in claim 8, in which the imprinting of step (a) is carried out by machining the cylindrical surface of the prefabricated sleeve.
10. The method as in claim 8, in which said imprinting of step (a) is carried out by forming indentations in the sleeve cylindrical surface during rolling or casting to fabricate the sleeve.
11. The method as in claim 8, in which the cylindrical surface of said sleeve is the outer surface thereof and the pattern of grooves extends throughout the entire outer surface to achieve essentially 100% lay-up of aluminum against such surface during step (b).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US75813191A | 1991-09-12 | 1991-09-12 | |
| US07/758,131 | 1991-09-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2077187A1 true CA2077187A1 (en) | 1993-03-13 |
Family
ID=25050625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2077187 Abandoned CA2077187A1 (en) | 1991-09-12 | 1992-08-28 | Cast-in-place iron-based cylinder liners |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0532331B1 (en) |
| CA (1) | CA2077187A1 (en) |
| DE (1) | DE69216018T2 (en) |
| MX (1) | MX9204697A (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19634504A1 (en) | 1996-08-27 | 1997-12-04 | Daimler Benz Ag | Manufacture of blank of a light-metal component to be incorporated into a light-metal casting |
| DE19807685C2 (en) * | 1998-02-25 | 2000-11-09 | Daimler Chrysler Ag | Method for producing blanks of a cylinder liner consisting of a light metal alloy |
| DE19853803C1 (en) | 1998-11-21 | 2000-03-30 | Vaw Alucast Gmbh | Apparatus for producing an engine block with cast-in cylinder liners comprises conical seating surfaces which ensure that the ends of the cylinder liners undergoing thermal expansion remain pressed against them |
| JP3253605B2 (en) | 1999-12-15 | 2002-02-04 | テーピ工業株式会社 | Cast-in cast iron member, cast-in product using the same, and method of manufacturing cast-in cast iron member |
| DE10012787B4 (en) * | 2000-03-16 | 2008-04-10 | Volkswagen Ag | Process for producing light metal castings with cast-in bushings |
| DE10125615A1 (en) | 2001-05-25 | 2002-12-05 | Mahle Gmbh | Mold and method for making a lost foam cast model for a light metal liner |
| DE60305691T2 (en) | 2002-05-13 | 2007-05-31 | Honda Giken Kogyo K.K. | Cast-iron inner limb and method of preparation for it |
| DE102010018228A1 (en) * | 2010-04-23 | 2011-10-27 | Rheinisch-Westfälische Technische Hochschule Aachen | Metal hybrid composite casting |
| US20160252042A1 (en) * | 2015-02-27 | 2016-09-01 | Avl Powertrain Engineering, Inc. | Cylinder Liner |
| DE102017214732A1 (en) * | 2017-08-23 | 2019-02-28 | Bayerische Motoren Werke Aktiengesellschaft | Method for designing a component or material composite |
| DE102018122407A1 (en) * | 2018-09-13 | 2020-03-19 | Bergmann Automotive GmbH | Cylinder liner for a piston engine |
| US11499499B1 (en) | 2021-10-05 | 2022-11-15 | Brunswick Corporation | Marine engines, cylinder liners for marine engines, and methods and assemblies for forming marine engines |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR450434A (en) * | 1912-11-11 | 1913-03-25 | Anthelme Girel | Manufacturing process of engine cylinders, in steel with brazed cast iron liner |
| US3069209A (en) * | 1958-07-16 | 1962-12-18 | Alfred F Bauer | Method of bonding a bi-metallic casting |
| GB873012A (en) * | 1959-01-02 | 1961-07-19 | Aluminum Co Of America | Cast bimetallic articles |
| US3401026A (en) * | 1966-01-19 | 1968-09-10 | Gen Motors Corp | Method of forming a bimetallic article |
| DE3941381A1 (en) * | 1989-12-15 | 1991-06-20 | Audi Ag | CYLINDER BLOCK FOR AN INTERNAL COMBUSTION ENGINE |
-
1992
- 1992-08-13 MX MX9204697A patent/MX9204697A/en unknown
- 1992-08-28 CA CA 2077187 patent/CA2077187A1/en not_active Abandoned
- 1992-09-10 DE DE1992616018 patent/DE69216018T2/en not_active Expired - Lifetime
- 1992-09-10 EP EP19920308259 patent/EP0532331B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0532331B1 (en) | 1996-12-18 |
| EP0532331A1 (en) | 1993-03-17 |
| DE69216018D1 (en) | 1997-01-30 |
| MX9204697A (en) | 1993-03-01 |
| DE69216018T2 (en) | 1997-04-03 |
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