Mold for producing aluminum alloy composite piston through indirect extrusion casting technology and method thereof

Abstract

The invention discloses a mold of an aluminum alloy composite piston and a preparation method thereof. The mold comprises a movable mold core, a fixed mold core, a sprue bush, an ejection system, a cooling system, two local extrusion devices, a fiber ring positioning device and a cast iron ring clamping system, the fiber ring positioning device is arranged in the middle of the fixed mold core, the cast iron ring clamping system is composed of two air cylinders and a clamping block, three inserts of a fiber ring, a salt core and a cast iron ring are sequentially placed and placed into the fixed mold core at one time, the cast iron ring clamping system works to fix the three inserts, the local extrusion devices return, the mold is closed, a mechanical arm begins to scoop materials, molten aluminum is poured into a material barrel, the material barrel returns to rise and is in butt joint with the mold, under the effect of an equipment punch, the molten aluminum enters a cavity and wraps the three inserts, after mold filling is completed, the punch continuously performs pressurization, a piston is solidified under continuous high pressure, and mold opening sampling and spraying are performed to enter the next cycle. According to the mold of the aluminum alloy composite piston and the preparation method thereof, the production efficiency and the percent of pass are improved.

Description

technical field [0001] The invention relates to the technical field of molds, in particular to a mold of an aluminum alloy composite piston and a preparation method thereof. Background technique [0002] The piston is a key component of the engine. Because it works under the conditions of high temperature, high pressure, corrosion, wear, and high-speed movement, the requirements for the piston material are very high. It integrates new materials, advanced manufacturing technology and advanced design technology. It belongs to High-tech products. Composite piston has become one of the core technologies of international engine manufacturers, and it is also a key component that my country has long relied on imports. With the continuous improvement of engine power and the increase of engine heat dissipation, the high-temperature strength and heat resistance of ordinary high-nickel cast iron pistons are approaching the limit state, while aluminum-based composite pistons are lightw...

AI Technical Summary

Problems solved by technology

[0003] However, the pistons of large industrial vehicles produced by the direct extrusion casting process are cumbersome to operate and require high operator proficiency. Each mold production requires the cooperation of three or four operators; the production speed is slow and the efficiency is low, and each mold needs half Hours; the yield rate is low, due to the uncontrollable casting equipment and too many human factors, the pass rate of the product is low; in view of the above reasons, the production cost is high

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