The components and descriptions of the mould assemblyThe mould assembly should have the following characteristics: light weight and good structural rigidity, g

The components and descriptions of the mould assembly

The mould assembly should have the following characteristics: light weight and good structural rigidity, good inertia force when vibrating, simple structure, convenient disassembly and assembly, adjustment, and easy processing and manufacturing.

The mold assembly consists of the following parts: copper mould tube, outer water jacket, inner water jacket, upper and lower sealing flanges, various sealing rings, foot roller device, foot roller area spray device. The copper mould tube is the core part, and other parts are assembled around the copper tube.

1. The mold copper tube is made of copper or copper alloy, and the length is 700-1000mm. If the copper mould tube is short and the drawing speed is high, breakout is likely to occur; if the copper mould tube is too long, it will increase the drawing resistance and cause transverse cracking of the cast slab.

2. The influence of cooling water gap on the quality of cast slab

The cooling water gap is the water channel between the copper mould tube and the inner water jacket, and its size and accuracy affect the quality of the cast slab. The general size is 4mm, and the accuracy is ±0.2mm. And try to be even.

3. Foot roller device

The foot roller device at the lower part of the crystallizer has two functions. One is to guide the head of the starter when threading the starter, and prevent the copper mould tube from being scratched. The second is to have a clamping effect on the cast slab that has just exited the crystallizer, especially for the correction of the cast slab with a slight squaring phenomenon.

4 Spray device

The distribution of this section of cooling water is very important. The billet shell just out of the mold is relatively thin, and weak cooling is likely to cause steel breakout. If the cooling is too strong, sometimes defects such as internal cracks may occur; if the cooling is unevenly distributed, defects such as missing squares, dents, and longitudinal cracks are likely to occur. The spray device usually uses 2 to 3 rows of flat nozzles.

5 Sealing of the crystallizer

Since there is a water pressure of 0.7 to 1.2 MPa inside the crystallizer, the rationality of the sealing structure is very important to the safety of the crystallizer in use and to ensure smooth production. The sealing of the crystallizer mainly refers to the sealing of the upper and lower end flanges of the copper pipe and the sealing of the inner and outer water jackets.