CASTING MEMBER AND MANUFACTURING METHOD THEREOF

• Main Authors: MIZUMURA YUICHI, NAGASAWA RYO, SUZUKI NOBUAKI, YAMAMOTO AKITO, HISAOKA MIKI
• Format: Patent
• Language: English; Japanese
• Published: 25.04.2019
• Subjects: ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES; BLASTING; CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; COMBUSTION ENGINES; CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING; WEAPONS

To reduce the weight and size of a casting member used as a cylinder sleeve mounted on a cylinder block.SOLUTION: A cylindrical casting member used as a cylinder sleeve of a cylinder block mounted on a vehicular engine, comprises a plurality of convex parts 2 provided on an outer peripheral surface 1a so as to project radially outward, and on the radially outward side of the convex part 2, a flat part 5 is provided so as to extend in a direction orthogonal to a radial direction. An undercut shape part 6 is composed of a side wall surface 3a of the convex part 2 and the flat part 5.SELECTED DRAWING: Figure 5 【課題】シリンダブロックに搭載されるシリンダスリーブとして用いられる鋳包み用部材を軽量化及びダウンサイジング化をする。【解決手段】車両用エンジンに搭載されるシリンダブロックのシリンダスリーブとして用いられる円筒状の鋳包み用部材は、外周面１ａには、径方向外側に突出している複数の凸部２が設けられ、凸部２の径方向外側には、径方向に直交する方向に延びている平坦部５が設けられている。凸部２の側壁面３ａと、平坦部５によってアンダーカット形状部６が構成されている。【選択図】図５