研究目的
Investigating the effect of laser-induced periodic surface structures on the self-cleaning properties of venting slots in injection molds.
研究成果
The use of multiscale texturing, combining grinding marks and LIPSS, significantly reduces fouling on vent surfaces. A linear relationship between contact angle and clogging ratio was established, indicating that surface wetting properties can predict self-cleaning efficacy.
研究不足
The study focuses on PET and may not be directly applicable to other polymers. The experimental setup simulates but does not fully replicate the dynamic conditions of an actual injection molding process.
1：Experimental Design and Method Selection:
The study involved the use of laser ablation to generate laser-induced periodic surface structures (LIPSS) on steel inserts to modify their surface properties.
2：Sample Selection and Data Sources:
Cylindrical steel inserts with different surface topographies were used. The degradation of poly(ethylene terephthalate) (PET) over these surfaces was characterized.
3：List of Experimental Equipment and Materials:
A near-infrared ultrashort laser, confocal microscope, scanning electron microscope (SEM), atomic force microscope (AFM), and an experimental setup simulating the injection molding process were used.
4：Experimental Procedures and Operational Workflow:
The inserts were treated with laser ablation, their surfaces characterized, and then tested in an experimental setup that simulates the conditions in an injection mold.
5：Data Analysis Methods:
The clogging ratio was calculated using image subtraction techniques, and the wetting properties were analyzed through contact angle measurements.
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