Presentation on mould coating processes
- 2. INTRODUCTION MOULD COATING NEED OF MOULD COATING CHARCATERISTICS OF COATING MATERIAL GRAPHITE MOULD COATING VACUUM MOULD PROCESS WORKING ADVANTAGES AND DISAVANTAGES
- 3. A hollow container used to give shape to molten or hot liquid material when it cools and hardens.
- 4. A coating is a covering that is applied to the surface of an object, usually referred to as the substrate. The purpose of applying the coating may be decorative, functional, or both.
- 5. The Mould Coating (MC) process is a specially developed process where plastic components are coated in the tool via so-called negative moulds during production.
- 7. GOOD ADHESION TO SUBSTRATE PROVIDE PROTECTION AGAINST PENETRATION BE FAST IN DRYING GOOD COVERING POWER MINIMIZE CORE STRENGTH DEGREDATION
- 8. GRAPHITE MOULD COATING USED IN NON FERROUS AND IRON FOUNDARIE S NOT EASILY PENTRATED AND WET BY MOLTEN METAL CANNOT BE USED IN STEEL BECAUSE CARBON CONTENT IT IS FLAY TYPE , SILVERY WHITE IN APPEARENCE IT IS IN FINE POWDER FORM FREE FROM GRIITY PARTICLES
- 9. ASH CONTENT 12% - 15% VOLATILE MATTER 3% MAXIMUM MOISTURE CONTENT 1% MAXIMUM
- 10. CMS SPUNCOAT Graph coat S Graphdip S GW Spray It is a water based graphitic coating. Used as a die-release- agent in the centrifugal casting. It is supplied in a ready- to-use form for application by spraying method. It can readily be diluted with water if required to suit other application. Grey-black Solvent Based Graphitic coating for foundry cores and moulds Efficient penetration and coverage to provide maximum protection. CMS GRAPHCOAT S- SPRAY is suitable for all types of chemically bonded cores Produces a hard, silky coating finish Recommended for coating of cores made from all chemical sands that are used for light to medium section irons and non-ferrous metals It minimises and, in most cases eliminates, surface defects. CMS GRAPHDIP S exhibits excellent wetting properties
- 11. Vacuum forming is a simplified version of thermoforming, where a sheet of plastic is heated to a forming temperature, stretched onto a single-surface mold, and forced against the mold by a vacuum. Sheets of Polypropylene, Polyethylene, PVC and Acrylic
- 15. LOWER TOOLING COST HIGH SPEED /RAPID PRODUCTION FLEXIBLE TOOLING DESIGN WIDER DESIGN SCOPE
- 16. INABILITY TO HOLD TOLERANCES SECONDARY OPERATION NEEDED FOR FINISHED PART BUBBLE FORMATION