Method for blasting an inside surface of a cylinder
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United States of America Patent
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-
Jun 12, 2001
Grant Date -
N/A
app pub date -
May 6, 1999
filing date -
May 8, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention provides a method for blasting an inside surface of a cylinder, in which a steady rough surface is always obtained efficiently in the whole region of inside surface of cylinder for an internal combustion engine. For this purpose, a blast gun 1, which is provided so as to be moved vertically by a traverser 11 and capable of rotating around the axis thereof, has a blast nozzle 3 for blowing blast particles 2 in the vicinity of the lower end thereof. The blowing direction of the blast nozzle 3 is slant downward. A cylinder block 4 is placed upright so that the axis of each cylinder is vertical with a cylinder head mating surface 4e on the upper side, and is isolated from the surrounding space by a cabinet 12. The blast gun 1 blows the blast particles 2 while lowering in each cylinder of the cylinder block 4, by which the inside surface 5 of cylinder is blasted. A blast particle recovering reservoir 13 is provided under the apparatus to recover the blast particles 2.
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