Cold flow-creep superposition effect of ultra-large PTFE sintered parts

Ultra-large and ultra-heavy PTFE products undergo significant creep deformation due to their own weight during sintering. This problem is relatively common in sintering molding production and requires comprehensive analysis and solution from multiple aspects of material, process, and equipment.

(1) Temperature parameter aspect: The modulus of PTFE above its melting point within the sintering temperature range is extremely low (<1 MPa), leading to insufficient reaction kinetics or deteriorated material flowability, affecting the normal progress of the '2079851475616104453. (2) Process factor: The self-weight of large products is sufficient to cause creep, This factor affects the '2079851475616104453 and final quality of the product. (3) Material aspect: Fluctuations in raw material performance indicators or insufficient pretreatment affect molding quality. (4) Process aspect: Control deviation of key process parameters causes the '2079851475616104453 to deviate from optimal conditions. (5) Equipment aspect: Equipment precision and maintenance status affect the stable execution of process parameters.

(1) Material selection: Use a full-contact supporting mold to transmit gravity uniformly, Establish material selection evaluation criteria, and determine the optimal solution through comparative tests. (2) Formulation adjustment: Use horizontal instead of vertical sintering to reduce the influence of axial self-weight., Adjust gradually and verify the effect, ensuring that other performance indicators of the product are not affected. (3) Process optimization: Determine the optimal process parameter window through systematic tests and establish standardized operating procedures. (4) Quality control: Strengthen process monitoring and product inspection, Establish a defect early-warning and traceability mechanism. (5) Preventive measure: Establish sound process control standards and a quality inspection system, and regularly review process data for continuous optimization.

This problem requires comprehensive analysis from multiple dimensions of material, process, equipment, and operation, and should be solved by systematically optimizing process parameters and the quality control system.