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screw coatingModify Date : 2020-07-31 13:13:30
01SCREW Coating Overview
PVD coating, which contributes greatly to SCREW performance improvement, is thin film but has excellent effect in reducing strong surface hardness, friction, and wear.
02SCREW Illumination
Along with screw design, it is the most important factor in determining quality. The luminance of the screw affects the molding (supply and resin flow). Poor surface illumination reduces the fluidity of the resin, resulting in retention GASs and carbides. Before and after heat treatment, it was common to apply buffing and chromium plating. Currently, various coating methods are used to form high quality luminance.It is important to note that the surface illumination before coating must be kept below Ra -0.2 in order to obtain quality coating products.
resin containing grinding agent
resin containing more than 40% GF
excellent abrasion condition
Unique Color Gray Violet
Thin Film Hardness (HV3300) 0.025
Thin film thickness (μm) 1.5 to 1.0
Thermal Safety 900°C
Applied GF-containing materials (PA, PBT)
fluorine and chlorine-containing resin
resin containing copper active components
excellent corrosion protection
Unique Color Silver
Thin Film Hardness (HV1750) 0.025
Thin film thickness (μm) 1.5 to 1.0
Thermal Safety 700°C
Application field optical lens and Teflon series
superior liquidity
Reduced weld formation
Improvement of Deformity and Prevention of Wear
Unique Color Gold
Thin Film Hardness (HV2300) 0.025
Thin film thickness (μm) 1.5 to 1.0
Thermal Safety 595°C
Application field optical lens and light guide plate, keypad
(PC, PMMA)
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