Casting system for lost-foam-casting cam shaft

Abstract

The invention belongs to the technical field of lost-foam-casting, and relates to a casting system for a lost-foam-casting cam shaft. The casting system comprises a pouring cup, a sprue, a sprue base, a cross gate, a riser neck and a riser, wherein the bottom of the pouring cup is equipped with a filter device; the pouring cup is arranged on the top of the sprue and communicates with the sprue; the sprue base is arranged on the bottom of the sprue, and one end of the sprue base communicates with the sprue, and the other end of the sprue base communicates with the cross gate; one end, which is away from the sprue base and is inserted into a cam shaft mould cavity, of the cross gate is an in-gate; the in-gate communicates with the cam shaft mould cavity for guiding metal liquid to the cam shaft mould cavity; the in-gate is arranged at the riser neck with the biggest diameter cross area of the cam shaft; the riser is connected to the top end of the cam shaft; the riser is spherical; and a ratio of the area of the in-gate to the area of the cross gate to the area of the sprue is Sigma in-gate to Sigma S cross gate to Sigma S sprue being 1 to (1.2-1.3) to (1.4-1.9). The casting system solves the problem that slag blocking ability of the casting system during lost-foam-casting of a spheroidal graphite cast iron cam shaft.

Description

technical field [0001] The invention belongs to the technical field of lost foam casting, and relates to a gating system for a lost foam casting camshaft, in particular to a gating system for a lost foam casting camshaft suitable for a nodular cast iron camshaft. Background technique [0002] The manufacturing process of camshaft includes casting method, forging method and combined method. When the traditional casting method is used to produce the camshaft, the design of the casting cavity is complex, which causes great environmental pollution, and the ability of the cast iron cam bearing to withstand alternating loads is poor. Although the forged steel camshaft produced by forging has a good load limit, the processing cost is expensive and the economic benefit is poor. The combined camshaft produced by the combination method can effectively reduce the weight of the parts, but the process is relatively complicated, which increases the difficulty and risk of mass production....

AI Technical Summary

Problems solved by technology

[0008] In view of this, the present invention provides a gating system for the lost foam casting camshaft in order to solve the defects existing in the lost foam casting ductile iron oil pump camshaft in the prior art

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