Interlayer unfused in polyetheretherketone (PEEK) sintering

Interlayer incomplete fusion appears in 3D printing/powder bed sintering of PEEK. This problem is relatively common in sintering molding production and requires comprehensive analysis and solution from multiple aspects of material, process, and equipment.

(1) Crystallization behavior aspect: PEEK has high crystallinity and high risk, Changes in crystallinity affect the mechanical properties and dimensional stability of the product. (2) Crystallization behavior aspect: When the previous layer has crystallized and crusted, the interface cannot fully melt and diffuse when the next layer is deposited, Changes in crystallinity affect the mechanical properties and dimensional stability 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) Parameter adjustment: Increase the powder bed temperature close to the PEEK melting point to reduce crystallization crusting, It is recommended to adjust by 5-10°C each time, while monitoring product quality changes, to avoid new defects caused by excessively high temperature. (2) Formulation adjustment: Adjust the printing strategy to reduce single-layer cooling time, Adjust gradually and verify the effect, ensuring that other performance indicators of the product are not affected. (3) Material selection: Use a strategy of higher melt temperature matched with scanning speed., Establish material selection evaluation criteria, and determine the optimal solution through comparative tests. (4) 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.