keli machine vacuum extruder in cement brick is a key link in the plastic extrusion molding process. Its processing quality directly affects the molding quality of plastic products, production efficiency and the service life of the mold. The following are the main requirements of the keli machine vacuum extruder in cement brick:

I. Material Selection and Pretreatment

Material selection:

The extrusion die should be made of materials with higher hardness, wear resistance and corrosion resistance, such as high-speed steel, hard alloy, stainless steel, etc. These materials possess excellent mechanical properties and thermal stability, capable of withstanding high temperatures, high pressures and friction during the extrusion process.

Select the appropriate mold material based on the type of plastic and the extrusion process. For example, for heat-sensitive plastics, mold materials with good heat resistance should be selected.

Material pretreatment

After the materials arrive, strict chemical composition analysis, mechanical property tests and ultrasonic flaw detection are carried out to confirm that the materials have no internal defects.

Heat treatment pretreatment of materials, such as annealing or normalizing, is carried out to eliminate internal stress and improve the actual microstructure, preparing for subsequent processing.

Ii. Design Accuracy and Structural Rationality

Design accuracy:

The design of the extrusion die should ensure that the geometric shape, dimensional accuracy and surface roughness meet the standards. The precision of the mold directly affects the molding accuracy and appearance quality of plastic products.

During the design process, Computer-aided Design (CAD) and computer-aided engineering (CAE) technologies should be adopted to conduct accurate three-dimensional modeling and stress analysis of the mold and optimize the structural design of the mold.

Structural rationality

The structure of the mold should be simple and reasonable, facilitating processing and assembly. At the same time, it is necessary to ensure that the mold is subjected to uniform force during operation, reduce stress concentration, and avoid deformation and wear.

The flow channel design should have smooth transitions without dead corners to reduce pressure loss and material degradation. The mold should have a good temperature distribution to ensure uniform melting and molding of the plastic.

Third, appropriate processing accuracy and surface quality

Precision suitable for processing:

The processing of extrusion dies should adopt advanced manufacturing technologies such as CNC machine tools, EDM (Electrical Discharge Machining), and laser processing with appropriate precision to confirm the processing accuracy and surface quality of each component of the die.

For key dimensions and mating parts, processing equipment and technologies with appropriate precision, such as slow wire cutting and five-axis linkage processing, should be adopted to improve the manufacturing accuracy of the mold.

Surface quality:

The surface of the mold should be flat and smooth, without obvious holes, burrs or scratches. Surface finish is one of the important factors affecting the surface quality of plastic products.

Through surface treatment techniques such as carburizing, nitriding and chromium plating, the hardness, performance and corrosion resistance of the mold surface are enhanced, thereby prolonging the service life of the mold.

Iv. Assembly and Debugging

Assembly accuracy:

All components of the mold should be accurately assembled according to the design drawings, and it should be confirmed that all parts fit tightly without any looseness or misalignment. During the assembly process, one-to-one tools and measuring instruments should be used to confirm the assembly accuracy.

During the assembly process, attention should be paid to protecting the surface of the mold to avoid scratches and collisions.

Debugging and Optimization

After the mold assembly is completed, a trial mold adjustment should be carried out. Observe the flow of the plastic melt in the mold, adjust parameters such as mold temperature and pressure until the dimensional accuracy, appearance quality and mechanical properties of the extruded products all meet the requirements.

Based on the test mold results, necessary adjustments and optimizations are made to the mold, such as adjusting the mold clearance and optimizing the cooling system, to enhance the precision and performance of the mold.

V. Maintenance and Care

Daily cleaning

Regularly clean the molds to remove oil stains, impurities and residues on the mold surface, and keep the mold surface clean and smooth.

During the cleaning process, appropriate cleaning agents and tools should be used to avoid damaging the surface of the mold.

Lubrication and rust prevention

Use appropriate lubricants and rust inhibitors to lubricate the sliding parts of the mold and carry out rust prevention treatment on the mold surface to reduce the wear and corrosion of the mold.

Regularly inspect the lubrication and rust prevention conditions of the molds, and replenish lubricants and rust inhibitors in a timely manner.

Regular inspection and maintenance:

Regularly inspect the molds to promptly identify and address issues such as wear, deformation and cracks in the molds. For severely damaged mold components, they should be replaced in a timely manner or served with care.

Establish a mold file to record information such as the usage status, maintenance history and performance evaluation of the mold, providing a basis for the maintenance and management of the mold.

To sum up, the requirements of keli machine vacuum extruder in cement brick cover multiple aspects such as material selection and pretreatment, design accuracy and structural rationality, precision appropriate processing and surface quality, assembly and debugging, as well as maintenance and upkeep. Only by processing and managing strictly in accordance with these requirements can the quality and performance of the extrusion die be confirmed to meet the production demands of plastic products.

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