A casting method of a giant cast iron lion

Abstract

The invention discloses a giant cast iron lion casting method. The giant cast iron lion casting method includes the following steps: a step (1) is construction of a ground pit and manufacture of a ground case in the ground pit; a step (2) is shaping of an internal loam core and a framework; a step (3) is construction and manufacture of an external mold; a step (4) is design and manufacture of an enclosing case; a step (5) is design of a runner system; a step (6) is casting program control; and a step (7) is molten iron smelting and temperature control. According to the giant cast iron lion casting method, various problems which may be encountered in the process of casting a giant cast iron lion are comprehensively considered, corresponding solutions are adopted, and therefore the success rate of the casting of the giant cast iron lion is improved, the giant cast iron lion is formed in a one-step casting mode, and a piece of high-quality giant cast iron lion artwork is manufactured in the casting mode.

Description

technical field [0001] The invention relates to a processing method of cast iron products, in particular to a casting method of a giant cast iron lion. Background technique [0002] There is a giant cast iron lion in Cangzhou, Hebei Province, called the Lion King, and people also call it "Zhenhai Roar". It is nearly five meters high and weighs more than 40 tons. It is the earliest and largest cast iron cultural relic in China, and it is also a miracle and pioneering work in the history of casting technology in my country. Today, the iron lion, which has experienced wind, frost, rain and snow for more than a thousand years, is covered with cuts and bruises. The whole body is severely corroded, and there are cracks in various degrees on the limbs and the whole body. It can barely stand on the support of the iron frame. In 2009, the Cangzhou Municipal Government decided to recast the Cangzhou Iron Lion. [0003] The whole body of the iron lion is covered with decorations and ...

AI Technical Summary

Problems solved by technology

In the casting process, the following problems need to be solved: 1) To build a pit, first of all, the space required for the height, width, length, and range of the pouring and riser system of the iron lion must be calculated; 2) Such a large object requires overall casting processing 3) How to ensure that the cast iron lion can meet the requirements of surface decoration and texture effect; 4) How to make the clay core in the iron lion belly and what type should be used How to ensure the strength of the clay core, not crack or be crushed under high temperature iron solution and strong pressure, and become loose in time when the molten iron reaches the solidification condition, leaving room for retreat , so that the castings will not be cracked due to the strong expansion force of the mud core after the casting is cold, and the mud core can withstand the thousand-ton buoyancy force generated under the normal high temperature of molten iron; 5) The molding area is large and easy Impurities such as cold shut and secondary oxidation will affect the strength, surface quality and artistic effect of castings; 6) The pouring height is large, the vertical drop is large, and a hundred tons of molten iron will produce a huge expansion force when it falls, which will affect the iron lion. The feet have great destructive power, and the test on the entire legs and body of the iron lion is also quite severe; The heat preservation method of the melt and the merging process of molten iron are more critical, especially the control of the average error of the temperature in the final pouring process is very important

[0004] Throughout the history of modern industry, except for mechanical products, there has never been a large-scale artistic object cast in one-off integrally that exceeds this time in terms of volume, weight, height and surface complexity. The one-time casting is nearly 120 tons, and It is required that it cannot be cracked or welded. With such a large area, and it is made of gray cast iron, all the difficulties can be imagined. At present, there is no technical information and successful experience to learn from.