Casting sand core for engine cylinder and method for casting cylinder using said casting sand core

Abstract

The invention provides an engine cylinder body casting sand core applied to the field of automobile engine manufacturing auxiliary equipment, and further relates to a method for casting a cylinder body through the casting sand core. Mounting holes of a rubber bar (5) are formed in an air inlet side water channel machining component (2) and an exhaust side water channel machining component (3) of a cylinder body water jacket sand core (1) of the engine cylinder body casting sand core. One end of the rubber bar (5) is mounted on the air inlet side water channel machining component (2), and the other end of the rubber bar (5) is mounted on the exhaust side water channel machining component (3). According to the engine cylinder body casting sand core and the method for casting the cylinder body through the casting sand core, a channel for enabling an air inlet side water channel to communicate with an exhaust side water channel can be machined conveniently and reliably, cooling water between the air inlet side water channel and the exhaust side water channel of an engine freely flows, the temperature difference between an air inlet side water jacket and an exhaust side water jacket is reduced, the overall performance of the engine is improved, and the emission of the engine is reduced.

Description

technical field [0001] The invention belongs to the technical field of automobile engine production and manufacturing auxiliary equipment, and more specifically relates to a casting sand core for an engine cylinder body, and also relates to a method for casting a cylinder body using the casting sand core. Background technique [0002] When an automobile engine (especially a turbocharged engine) is working, due to the large temperature difference between the intake side and the exhaust side of the engine block, there is a temperature difference between the cooling water in the water channel on the intake side and the water channel on the exhaust side. The existence of this temperature difference will easily lead to different thermal deformation of the engine block at different positions, thereby reducing the sealing between the piston and the cylinder bore, and affecting the overall performance and emissions of the engine. In order to eliminate this temperature difference, th...

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Problems solved by technology

However, this mechanical processing method is easy to generate processing stress on the engine block, resulting in fractures in the stressed area of ​​the engine block during processing. In addition, the diameter of the channel processed by the mechanical processing method is small, and the connection effect is very limited, which cannot meet the requirements of the engine block. Different needs for different engine blocks

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