Molding Process
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Sintered molded products cracking
Fenómeno del problema
Pressureless sintered PEEK parts crack during sintering or after cooling
Análisis de la causa
Uneven volume shrinkage during sintering heating (internal-external temperature difference); cooling rate too fast producing thermal stress; uneven density of the preformed green body
Solución
Use slow and uniform heating rate (<3°C/min) and cooling rate; staged holding to homogenize the temperature field; increase pre-pressing pressure to improve green body density uniformity
Conclusión clave
The parameter control of the sintering process determines the success rate of PEEK pressureless molding
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