Cylinder liner and method for producing same

Patent metadata

Field	Value
Publication number	US-10213829-B2
Application number	US-201615203997-A
Country	US
Kind code	B2
Filing date	Jul 7, 2016
Priority date	Mar 17, 2010
Publication date	Feb 26, 2019
Grant date	Feb 26, 2019

Abstract

Disclosed is a cylinder liner having a high bonding strength to a cylinder block. Further disclosed is a method for producing the same. The cylinder liner uses a silicon-aluminum alloy as a material; a plurality of protrusions are formed on the external surface thereof; and the protrusions each contain a pillar section extending from the external surface, and a head section formed at the end of the pillar section.

First claim

The invention claimed is:

1. A method for producing a cylinder liner comprising a plurality of protrusions on an external surface thereof, each of the plurality of protrusions comprising a constriction at a root portion thereof:
preparing a mold having a plurality of slides and a core for delimitating a cavity, each of the plurality of slides having a surface facing the cavity and having recessions formed on the surface, wherein each slide is movable along a direction in which the recessions on the slides extend;
adhering a particulate mold release agent to edge portions of the recessions such that a large amount of the mold release agent adheres to the edge portions in order to form the constriction at each protrusion;
casting a cylinder liner-intermediate by flowing a silicon-aluminum alloy into the cavity and the recessions;
taking the cylinder liner-intermediate out from the mold; and
removing the mold release agent from the cylinder liner-intermediate.

2. The method according to claim 1 , wherein the mold release agent is electrified by a corona discharge.

3. The method according to claim 2 , wherein the external surface of the mold release agent is covered with a material containing an organic component.

4. The method according to claim 2 , wherein the cavity has a shape in which a plurality of tubes are interlinked.

5. The method according to claim 2 , wherein air in the cavity is discharged from an outlet formed in a bottom of each recession formed in the plurality of slides.

6. The method according to claim 1 , wherein an external surface of the mold release agent is covered with a material containing an organic component.

7. The method according to claim 6 , wherein the cavity has a shape in which a plurality of tubes are interlinked.

8. The method according to claim 6 , wherein air in the cavity is discharged from an outlet formed in a bottom of each recession formed in the plurality of slides.

9. The method according to claim 1 , wherein the cavity has a shape in which a plurality of tubes are interlinked.

10. The method according to claim 9 , wherein air in the cavity is discharged from an outlet formed in a bottom of each recession formed in the plurality of slides.

11. The method according to claim 1 , wherein each recession has a bottom and air in the cavity is discharged from an outlet formed in the bottom of each recession formed in the plurality of slides.

Assignees

• Moresco Corp

Inventors

• Yamagata Hiroshi
• Shima Hidetaka

Classifications

• B22D15/02

  of cylinders, pistons, bearing shells or like thin-walled objects · CPC title

• B22D29/00

  Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots {(B22D13/10, B22D11/124, B22D17/00 take precedence)} · CPC title

• B22D19/08

  for building-up linings or coverings, e.g. of anti-frictional metal · CPC title

• F16J10/04

  Running faces; Liners · CPC title

• F02F1/102

  Attachment of cylinders to crankcase · CPC title