Ensuring the dimensional accuracy of sleeve brick is the key to ensure its stability and service life in high temperature environment. The following are the methods and control techniques to ensure the dimensional accuracy of sleeve bricks:

I. Strictly control the quality of raw materials

The quality of raw materials directly affects the dimensional accuracy of finished products. In the production process, chemical and physical analysis should be carried out on the incoming raw materials to ensure that their composition and particle size meet the production requirements.

The appearance and impurity content of raw materials also need strict inspection to avoid dimensional deviation caused by raw material problems.

II. Optimizing the molding process

Intelligent forming system: adopting full-automatic hydraulic press, it can automatically complete the processes such as distributing, pressing, demoulding, etc., so as to ensure the accurate size control of the formed brick blank, with the error less than 0.5%.

Die accuracy: the quality and accuracy of the die directly affect the size of the sleeve brick. Moulds should be processed in strict accordance with production drawings to ensure dimensional accuracy.

III. Sintering process control

Sintering temperature and time: During sintering, temperature and time should be strictly controlled to avoid dimensional changes caused by too high or too low temperature.

Gradient sintering process: gradient sintering process is adopted to ensure the uniform internal structure of the material and reduce the dimensional deviation caused by uneven shrinkage.

IV. Processing and shaping

Using high-precision processing equipment, such as CNC grinder and cutting machine, the sintered sleeve brick is processed to ensure the dimensional accuracy.

Grinding and shaping the finished product to further improve the dimensional accuracy.

V. Quality inspection

Automatic inspection equipment: electronic eyes, optical instruments, ultrasonic scanning and other equipment are used to inspect the size, appearance and internal defects of finished products.

Dimensional accuracy detection: use tools such as calipers or micrometers to accurately measure the dimensions of finished products to ensure that the dimensional deviation is within the allowable range.

VI. Technical specifications and standards

Follow relevant standards, such as GB/T 5990-2021, to ensure that the production process and product quality meet the national standards.

Formulate internal control standards for enterprises, strictly stipulate dimensional accuracy and strictly implement it in the production process.

Through the above method, the dimensional accuracy of sleeve brick can be effectively ensured, thus improving its stability and service life in high temperature environment.