The document discusses mould coatings, which are coatings applied to mould surfaces. Mould coatings need to adhere well, dry fast, and provide a protective barrier against penetration while minimizing degradation of the mould core strength. Graphite mould coatings are commonly used in non-ferrous and iron foundries as they cannot be easily penetrated or wet by molten metal. Vacuum mould coating is also discussed as a process where plastic components are coated in a tool via negative moulds during production. It has advantages like lower tooling costs but limitations like inability to hold tight tolerances.

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.

6. DEMOULDING
CLEANING
EFFORT
TO
INCREASE
LIFETIME
DECREASE
RFURBISHIN
G EFFORT
FOR EVEN
SURFACE

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