Device for centrifugally casting cylinder sleeve

Abstract

The invention discloses a device for centrifugally casting a cylinder liner, which belongs to the field of casting. It includes the mold and the locking mechanism at the front end of the mold and the rear plate at the rear end of the mold for ejecting the cast cylinder liner blank. There is a stepped hole I at the rear end of the mold, and the rear plate is set in this stepped hole I. The inner side of the rear plate is provided with a steel rear pad iron that matches the inner hole of the rear end of the mold, and the rear plate is provided with a rear disc bushing that presses the rear pad iron; there is a stepped hole II at the front end of the mold, and this stepped hole There is a front plate inside the II, and a front plate iron is set on the inner side of the front plate, and a heat insulation pad is set between the front plate and the front plate iron, and the middle of the front plate, the front plate iron and the heat insulation pad is set correspondingly There is an inlet for pouring molten iron; a paint layer is coated on the inner wall of the mold, the inner surface of the back pad iron and the front pad iron. The invention can cast the cylinder liner of the internal combustion engine without using the asbestos pad, and the quality of the casting is higher than that of the casting casted with the asbestos pad.

Description

technical field [0001] The invention relates to a new process device for casting an internal-combustion engine cylinder liner blank, and belongs to the technical field of centrifugal casting in special casting processes. Background technique [0002] The cylinder liner is a key component in the internal combustion engine, and its quality largely determines the overhaul period of the internal combustion engine. Among the many types of cylinder liners, the use of cast iron cylinder liners is still the largest. Cast iron cylinder liners are made of boron alloy, phosphorus alloy, chromium molybdenum copper, bainite, vermicular graphite cast iron, etc. Cast iron cylinder liner casting processes include centrifugal casting, coated sand molding casting, lost foam casting, etc. Centrifugal casting has high production efficiency, simple process, reliable quality and low cost, so it is still the main production process of casting cylinder liners at home and abroad. [0003] In the p...

AI Technical Summary

Problems solved by technology

[0005] In order to obtain the ideal casting structure without using asbestos pads in the centrifugal casting industry at home and abroad, most of the two ends of the cylinder liner blank adopt the method of increasing the machining allowance, and remove the unsatisfactory casting structure at both ends during subsequent machining. In this way, the cost is high, the material is wasted, and the casting yield is low

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