hard surface coating

W-Ceramic coating with auto-spray attachment

Gujarat Elastomers and Polymer Technologies Ltd. (GEPTL) has  been a reliable supplier of  Hard Surface coated rolls to various industries including Textile and Woven Sacks industry. With increased  capabilities, GEPTL has now extended these services to other Industries such as Paper, Sugar, Cement, Drilling, Steel etc also.

The 4 common Hard Surface Coatings catered to by us are:

  1. Hard Chrome Plating
  2. Electroless Nickel Plating
  3. Hard Anodizing (for aluminium base metal only)
  4. Ceramic/Cermet coating with Plasma spray

CERAMIC / CERMET COATING

A) PROCESS CAPABILITY:

Basic Equipment:    

SULZER-METCO PLASMA  SYSTEM 40 KW & 80 KW
SUITABLE  FOR MAJOR APPLICATIONS  

  1. Various ceramic/cermet coatings including Chromium oxide, Chromium Oxide-Silica Composite, Alumimium Oxide,
  2.  Zirconium Oxide etc.
  3. Coating thickness up to 1000 microns
  4. Coating density exceeds 99.5% and bond strength 70 to 90 MPa
  5. Coating hardness more than 1000 HV
  6. For coated Rolls not requiring grinding, dia upto 1500 mm and length upto 4000 mm can be done
  7. For coated Rolls  requiring grinding, dia upto 1500 mm and length upto 3000 mm can be done
  8. Though Flame temperatures are high(>3000 deg C) the process does not distort the part coated
  9. For bigger rollers coating done on autospray attachment (SEE PHOTO) with controlled feed/speed ratio.
  10. When Coated roller OD/AXIS concentricity is critical, OD grinding can also be done.
  11. Rolls can be recoated after stripping old coating also
  12. New rolls can be reverse engineered from sample

B) TYPICAL APPLICATIONS:

  1. Central Press Roll in Paper Making
  2. Drier Drums
  3. Traction Rolls
  4. Inking Rolls
  5. Gripper bars/Pads
  6. Calendering Rolls

C)  OTHER APPLICATIONS FOR PAPER INDUSTRY IN INDIA       

    • Glue Applicator Roll for carton Making Machinery
    • Doctor Rolls pairing with Glue Applicators
    • Corrugating Roller
    • Flute Form Rollers