01Screw Coating

The PVD coating, though thin in thickness, provides high surface hardness and greatly reduces friction and wear of the screw.

02Screw Surface Roughness

The surface roughness of screw determines the screw quality together with the design of the screw. The surface roughness affects molding performance (resin feed and flow). High surface roughness reduces liquidity of resin, generating gas and carbides. The conventional methods include buffing and chrome plating after heat treatment. Recently, various coating materials and technologies have been introduced to achieve very low surface roughness. In general, the surface roughness prior to coating must be Ra -0.2 or below to obtain high quality coating.

03Screw Coatings

Futura nano Coating

Resins containing abrasives

Resins containing more than 40 % of glass fiber

Excellent resistance to wear

Unique color Gray Violet

Hardness (HV3300) Depth0.025

Thickness (㎛) 1.5~1.0

Thermal stability 900℃

Application GF reinforced compounds (PA, PBT)

CrN Coating

Resins containing fluorine and chlorine

Resins containing copper active ingredient

Excellent resistance to corrosion

Unique color Silver

Hardness (HV1750) Depth0.025

Thickness (㎛) 1.5~1.0

Thermal stability 700℃

Application Optical lenses and Teflons resin (PMMA, PVC, PU, POM)

TiN Coating

High fluidity

Minimized weld line

Improved releasing performance and wear-resistance

Unique color Gold

Hardness(HV2300) Depth0.025

Thickness(㎛) 1.5~1.0

Thermal stability 595℃

Application Opticcal lens,LGP( light guide plate), Key pad (PC, PMMA)