Automobile mold casting cast by compounding ductile iron and gray iron, gating system and casting method

Abstract

The invention relates to an automobile mold casting cast by compounding ductile iron and gray iron, a gating system and a casting method. The automobile mold casting comprises a mold base and a working part, wherein the mold base and the working part are cast and formed at a time. The mold base is made of the gray iron. The working part is made of the ductile iron. Metallurgical bonding is adopted for the bonding face of the mold base and the working part. In this way, the mold base and the working part are integrally cast and formed at a time, and the casting production time is saved; and meanwhile, because machining standards of molds are basically consistent, the machining workloads are substantially reduced, the machining precision is substantially improved, the machining time is obviously shortened, the machining cost is reduced, the mold assembling and debugging difficulty is substantially lowered for bench workers, and the mold assembling and debugging time is substantially shortened for the bench workers. In addition, the metallurgical bonding is adopted for the bonding face of the mold base and the working part, the bonding face has good process performance, the bonding strength is high, and therefore the problem that the bonding face cracks is avoided.

Description

technical field [0001] The invention belongs to the field of automobile mold casting, and specifically relates to an automobile mold casting, a pouring system and a casting method for composite casting of nodular iron and gray iron. Background technique [0002] Automobile mold is the key equipment to complete the forming of auto parts and realize the mass production of automobiles. It plays an important role in the development and remodeling of automobiles. A new model needs about 350-400 sets of automotive panel molds, worth more than 100 million. On average, about 25% of the car panel molds of a modified car need to be replaced, and the value of the replaced molds also reaches tens of millions. Major automobile manufacturers regard improving the cycle of automobile launch as one of the important measures to improve competitiveness, so they put forward higher requirements for the renewal time and quality of automobile panel molds. The existing automobile mold production ...

AI Technical Summary

Problems solved by technology

[0005] In the process of double-liquid composite casting, the two casting liquids cannot be mixed, which will reduce the purity of the high-hardness casting liquid material, thereby reducing the mechanical properties of the work piece, and can not cause cold insulation and oxidation inclusions on the joint surface of the two metals defect

However, the traditional double-liquid composite casting method uses a single two pouring devices to superimpose to realize the double-liquid composite casting molding, which is easy to cause the two casting liquids to mix or cold shut, and oxidize inclusion defects, which will affect the quality of the double-liquid composite casting.

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