Rotational Molding

Rotational Castings/Die Cutting
Rotational Castings/Die Cutting
Rotational Castings/Die Cutting

Rotational Casting is the process whereby a liquid is poured into a mold and rotated by a rotational casting machine to coat the inside of the mold. When the liquid hardens the mold is taken out of the machine and opened to reveal a hollow casting. This process produces parts with a very fine finish. Air holes are eliminated and the finest of details are reproduced.


Johnson Plastics & Supply offers rotational casting as another option to our customers for producing their custom applications. Rotational casting offers many advantages over injection molded parts such as:


  • Lower initial setup costs
  • Seamless and stress free parts
  • Greater flexibility in products design
  • Consistent wall thickness


Rotational casting produces a hollow part that saves material, saves casting time and provides a higher level of detail. Examples of rotational casting applications produced by Johnson Plastics are cremation urns and mannequin parts ideal for robotics or displays.


Die-Cutting involves the process of stamping out shapes of material with steel rule dies adjusted to various degrees of hydraulic pressure. The application of die cut parts is used in a variety of industries.

Available In:

  • Circles
  • Squares
  • Gaskets
  • Covers
  • Materials Available
  • Neoprene
  • Foam
  • Silicone
  • Buna
  • Urethane
  • PETG
  • Polycarbonate
  • HDPE
  • ABS


Sizes available range in between 22" and 60" and in thicknesses of .010 to .375, depending on material.


Die-Cutting Machine Specs:

  • 60 Ton Press
  • Cut Sheet or Rolls
  • Uses any Steel Rule Die


Applications include:

  • Frame Fillers
  • Furniture pieces, such as hardboard backs and chipboard arms.