A molding die for automobile exhaust manifold and its implementation method

Abstract

The invention relates to a mold for forming an automobile exhaust manifold and an implementation method thereof, comprising an upper mold and a lower mold, the upper mold prints an upper mold cavity on the upper sand box, and the lower mold prints a lower mold on the lower sand box Cavity, the upper mold cavity and the lower mold cavity are combined to form the gating system of the automobile exhaust manifold; the upper gating system of the upper mold includes a side riser module, a heating block is set on the side riser module, and the upper mold is on the upper mold of the upper sand box When the side riser is printed, the heating block is released from the side riser module and transferred to the top of the side riser, which is used to rapidly raise the temperature of the molten iron in the side riser, thereby forming a temperature field for the isolated thermal joint. This application solves the problem that shrinkage and shrinkage are easy to occur at the isolated hot joint of the exhaust manifold, and the molten iron casting system corresponding to the forming mold saves the cold iron and feeding runner at the traditional large flange, reducing the feeding Shrinking the riser, improving the utilization rate of molten iron means increasing the yield, and simplifying the subsequent trimming operation of the slab.

Description

technical field [0001] The invention relates to a molding die and a molding method of an automobile exhaust manifold. Background technique [0002] The automobile exhaust manifold is an important part of the automobile. It is usually fixed on the cylinder block or cylinder head with screws, and communicates with the exhaust pipe downward. The function of the automobile exhaust manifold is to collect the exhaust gas discharged from each cylinder, pass through the exhaust pipe and muffler, and then discharge it into the atmosphere. The most important requirement for automobile exhaust manifold is to reduce the exhaust resistance when exhausting. When a certain pipe exhausts outwards, it will collide with the undischarged exhaust gas coming in from other cylinders, resulting in Exhaust resistance. Therefore, each cylinder of the exhaust manifold needs to have branches, and the cylinders should be separated as far as possible to reduce exhaust resistance, so as not to affect t...

AI Technical Summary

Problems solved by technology

With riser feeding, the setting of risers and ingates will reduce the utilization rate of molten iron, and generally two pieces of cold iron should be installed at the large flange. Iron recovery operation is not beneficial to production efficiency

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