DESIGN AND APPLICATION

The rotamoulding process offers more design freedom and flexibility of form than many other moulding techniques. like injection blow molding, Injection Molded Plastic Parts
Despite its simplicity and economical tooling, surprisingly complex forms can be achieved that are unobtainable with other processes. The advantages are many and varied

  • Rotamoulding does not involve high pressures, hence the low tooling costs. When rotational moulding is used as an alternative to injection or blow moulding, tooling cost can be reduced by as much as 80 – 90%.
  • Low tooling costs enable productions runs of less then 100 to be realised, and make economical prototyping possible, particularly for blow moulding. In addition, experimentation with different wall thicknesses, alternative polymers and a wide variety of surface finishes is not prohibitive.
  • but not every plastic injection molding parts can be made in rotamoulding process, some of the need to made in plastic injection molding process, some of them made in blow molding. if you need to reduce your plastic injection molding tooling cost, then find mold manufacturer China companies to support you.
  • Since mouldings do not have to withstand high pressure during the rotational process, they are virtually stress-free. In comparison with high-pressure moulding processes, they are less likely to suffer stress cracking in use.
    It’s easier to make changes to a rotational mould than to other types of mould, with the advantage that lead times can be cut to a minimum. In some cases products can go from CAD concept to production in a matter of weeks. This means that design can reflect market requirements.
    Depending on the design, Hollow shapes can be moulded without seams, sprues or ejection marks.
    Wall thickness normally remains constant throughout the entire moulding and can be even greater than 10mm. If required, it can be Increasedwhere service stress is likely to be applied.
    Screw threads bosses and metal inserts can easily be moulded in, reducing expensive secondary fabrication.
    Excellent load bearing properties can be achieved with twin-wall cavities or by foam-filling the spaces between the walls.
    Rotamoulding is ideal not only for tough rigid shapes but also for flexible mouldings with deep undercuts, used in the manufacture of inflatable products such as rescue crafts and toys.
    Engineering resins can now be rotationally formed to produce mouldings for continuous service in both high and low-temperature environments.
  • Both symmetrical and asymmetrical designs can be formed as well as complex, one piece mouldings impossible with other processes.
    Mould surfaces can be texturedfor safety or aesthetic reasons, or carry moulded-in company logos, information or diagrams.
    Rotamoulding offers great flexibility of size, from small medical squeeze bulbs to bulk storage tanks of over 15,000 litres. However, it is best suited to medium to large mouldings.
    Rotationally moulded engineering polymers can produce high strength, minimum weight mouldings at the lowest possible cost compared with other engineering polymers moulded by other processes.
  • Rotamoulding is one of the few processes that permits undercuts, and if these are small, draft angles can be avoided. In addition, if the design does not necessitate an internal male core, no angled taper is needed.
    It’s easier to make changes to a rotational mould than to other types of mould, with the advantage that lead times can be cut to a minimum. In some cases products can go from CAD concept to production in a matter of weeks. This means that design can reflect market requirements.
    No sprues or runners means low materials wastage. Excess material that is cut from a finished component can be recycled immediately in the factory. In addition, waste-free design can be built into a mould, such as a container and lid moulded together and separated afterwards.
    Rotamoulding offers designers the benefit of recyclability. Mouldings tend to be in one thermoplastic polymer, enabling designers to plan for material recovery.

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