Nodular cast iron pipe die

Abstract

The invention belongs to the field of graphite cast iron pipes, and particularly relates to a nodular cast iron pipe die which comprises a first die pipe. The inner surface of the first die pipe is connected with a second die pipe, and the inner surface of the second die pipe is connected with a third die pipe. One end of the first die pipe is connected with a limiting block. Grooves are formed in the inner sides of the first die pipe, the second die pipe and the third die pipe. Screw holes are formed in the positions, close to the corresponding grooves, of the inner side of the first die pipe, fixing pieces are arranged on the inner sides of the grooves, and screw rods are arranged on the inner sides of the fixing pieces. A third air outlet hole is formed in the end, close to the limiting block, of the third die pipe. A first cold air channel is formed in the first die pipe, a second cold air channel is formed in the second die pipe, and a third cold air channel is formed in the third die pipe. By means of the nodular cast iron pipe die, the problem that a traditional nodular cast iron pipe die cannot meet the casting requirements of iron pipes of different specifications is solved, and meanwhile a technical scheme capable of increasing the molten iron cooling rate and improving the iron pipe production efficiency is provided.

Description

technical field [0001] The invention relates to the field of ductile iron pipes, in particular to a ductile iron pipe mold. Background technique [0002] Spheroidal graphite cast iron is obtained through spheroidization and inoculation treatment, which effectively improves the mechanical properties of cast iron, especially improves plasticity and toughness, thereby obtaining higher strength than carbon steel. Ductile iron is a high-strength cast iron material developed in the 1950s. Its comprehensive performance is close to that of steel. It is based on its excellent performance that it has been successfully used to cast some complex stress, strength, toughness, and wear resistance. Parts with high performance requirements. The so-called "substituting iron for steel" mainly refers to ductile iron. [0003] The design of the ductile iron pipe mold largely determines the quality of the ductile iron finished product. [0004] The following problems exist: [0005] 1. Ductil...

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Problems solved by technology

[0007] Aiming at the deficiencies in the prior art, the present invention provides a ductile iron pipe mold, which solves the problem that the traditional ductile iron pipe mold cannot meet the casting requirements of iron pipes of different specifications, and at the same time provides a method that can increase the cooling rate of molten iron , a technical solution to improve the production efficiency of iron pipes

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