Tpr Co., Ltd.

Tpr Industry Co., Ltd.

Ipr Industry Co., Ltd.

Mako Abe

Akira Sato

Takashi Sato

Koichi Hatakeyama

Tomoki Takiguchi

Yoshihiko Aoki

Yuusuke Okuyama

The present invention addresses the problem of providing a cylinder liner for insert casting, with which the bonding strength between a cylinder liner and a cylinder block can be improved by reducing voids generated on the cylinder block. The problem is solved by a cylinder liner for insert casting which includes plural projections on its outer peripheral surface and satisfies the following (i) and (ii): (i) the number of the projections is 5 to 50 per 1 cmon the outer peripheral surface, and (ii) when two 15.2 mm&#xd7;0.03 mm lines are set in parallel with a gap of 3.8 mm therebetween at an arbitrary position on the outer peripheral surface of the cylinder liner, the total number of projections that are in contact with the two lines is 8 or less.

Cylinder liner for cast-covering, and method for manufacturing cylinder block

To provide a cast iron cylindrical member capable of improving the bonding strength when metal on the outer peripheral side and the cast iron cylindrical member are integrated. For this objective, in a cast iron cylindrical member including a plurality of projections including constricted projections on the outer peripheral surface, the anchor portion index (I) represented by {(A&#x2212;B)&#xd7;&#x3c0;/4&#xd7;Pn&#xd7;Pr/100}&#xd7;0.35H/2 is set in a specific range.

Cylindrical member

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Yamagata, Japan

Mako Abe