Crankcase bridge cover plate casting system

Abstract

The invention relates to the field of crankcase casting, and discloses a crankcase bridge cover plate casting system comprising a base plate and a plurality of crankcase cylinder bore sand cores arranged in parallel separately. An outside core is sheathed outside each cylinder bore sand core, and a hollow cavity is arranged between the cylinder bore sand core and the outside core; the top of the base plate is provided with a supporting seat, and the cylinder bore sand cores are arranged on the supporting seat; the base plate is provided with a casting inlet and a casting channel which are used for injecting molten iron into the cavity; the casting channel comprises liquid inlet channels arranged at both sides of the supporting seat, and a bridge channel penetrating through the supporting seat, and the liquid inlet channels communicate with the bridge channel; the casting inlet is arranged at one of connections between the liquid inlet channels and the bridge channel; the liquid inlet channels communicate with the cavity; and the top of the bridge channel is provided with a bridge cover plate used for preventing the molten iron from coming into contact with the cylinder bore sand cores. The casting system disclosed by the invention has the technical effects that gas is prevented from entering the cavity through the gap between the cores in advance, resulting blowhole defects, and the qualified rate of machining is improved.

Description

technical field [0001] The invention relates to the field of crankcase casting, in particular to a pouring system for a crankcase bridge cover plate. Background technique [0002] In the crankcase casting industry, the structural design of the gating system directly affects the qualified rate of castings. At present, the commonly used gating system structure of the crankcase adopts the bottom injection type. The gating system uses molten iron to pass through the bottom of the cylinder hole sand core. After the high-temperature molten iron contacts the cylinder hole sand core, a large amount of gas will be generated. If the crankcase body Due to structural requirements, the cylinder hole sand core needs to be installed separately, and the gas generated will naturally move upward from the gap between the cores and enter the cavity ahead of time. When the molten iron is full to cover the gap, the gas cannot be removed, so The casting produces air holes at this place, causing t...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to: in the prior art, a large amount of gas will be generated after the high-temperature molten iron contacts with the cylinder hole sand core, and the gas enters the mold cavity in advance from the gap between the core and the core, causing air holes to appear after the crankcase blank is processed The technical problem of being scrapped due to defects, the present invention provides a casting system for the bridge cover plate of the crankcase body. The gap enters the cavity in advance to cause air hole defects, which improves the processing pass rate

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