Fingerprint marks/contamination traces on sintered part surface

Operators leave unremovable traces after touching the product. Surface defects directly affect the appearance quality and service performance of the product, and are particularly obvious in transparent products. This defect affects the appearance quality of the product and reduces the market competitiveness of the product.

(1) Temperature parameter aspect: Grease or sweat from hands is absorbed by the product surface and carbonized at the sintering temperature, leaving marks; temperature deviations directly affect the physical and chemical state of the material and the reaction process. (2) Mold aspect: The mold surface finish is insufficient or maintenance is poor. (3) Process aspect: Improper temperature or pressure parameters affect the surface molding quality. (4) Material aspect: The shrinkage or rheological characteristics of the resin formulation affect the surface replication accuracy.

(1) Implementation measure: Operators wear clean gloves throughout the process, formulate specific operation plans in combination with actual production conditions, and verify the implementation effect. (2) Implementation measure: Avoid touching the preform blank with bare hands, formulate specific operation plans in combination with actual production conditions, and verify the implementation effect. (3) Implementation measure: Establish clean operation specifications., formulate specific operation plans in combination with actual production conditions, and verify the implementation effect. (4) Preventive measure: Establish a sound process control standard and quality inspection system, and regularly review process data for continuous optimization.

Surface defects are the result of the combined effects of mold state, process parameters, and material formulation, and each factor needs to be systematically investigated and optimized in a targeted manner.