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Rotational molding(Roto-Molding (Advantage (uniform wall thickness,…
Rotational molding(Roto-Molding
process
heating
Move into an oven where biaxial rotation takes place as the mold is heated
cooling
move into cooling chamber while rotating
Charging
Charged with powder or liquid
Demolding
part removed
Advantage
uniform wall thickness
virtually stress free
product weight is significantly reduced
wide range of sizes
molds run simultaneously on same machine
easy to undercuts and intricate contours
molds are simple and inexpensive(typically 1/5 that of injection molds).
no scrap
free of weld-lines, gate vestiges and scars
disadvantage
plastic pellets must be pulverized which increases cost
difficult to maintain precision
long cycle time and high heat
warping
mold heated and cooled as well as plastic
limited details