Plastic Rotational Mould

Plastic Rotational Mould

PlasticRotational Moulding, also known as Rotomoulding, is a versatile and cost-effective manufacturing process used to produce hollow plastic products. The process involves placing powdered plastic resin into a hollow metal mold, which is then heated and rotated slowly along two perpendicular axes. The heat melts the plastic, which coats the interior of the mold evenly, forming a seamless and durable part as it cools.

Rotational moulds are typically made of aluminum or steel and are widely used to manufacture a wide range of items â€” from water tanks and containers to toys, automotive parts, and industrial equipment housings. The rotomoulding process offers design flexibility, uniform wall thickness, and is ideal for low- to medium-volume production.

Top 10 FAQs about Plastic Rotational Moulds

What is rotational moulding used for?
It is used to create hollow plastic parts like tanks, containers, bins, playground equipment, and industrial components.
What materials are used in rotomoulding?
Primarily polyethylene (LDPE, LLDPE, HDPE), but also PVC, nylon, and polypropylene.
How does a rotational mould work?
The mold is filled with powdered plastic, then heated and rotated to evenly distribute the material along the interior.
What are the advantages over injection or blow molding?
It allows for seamless hollow parts, more design freedom, and lower tooling costs â€” especially for large items.
Are rotational moulds expensive?
No â€” compared to injection moulds, rotational moulds are more affordable and quicker to manufacture.
Can multiple parts be made at once?
Yes, multi-cavity moulds allow for several parts to be formed simultaneously.
What finishes can be applied to the mould surface?
Textures, logos, and patterns can be incorporated into the mould surface for a custom product finish.
Is it suitable for food-grade or UV-resistant products?
Yes, with the right plastic grade and additives, products can be made food-safe or UV-stable.
Are the moulds durable and reusable?
Absolutely â€” well-maintained metal moulds can last for thousands of cycles.
Is rotational moulding environmentally friendly?
Yes, there's minimal material waste, and the process allows for recyclable materials to be used.

Applications of Plastic Rotational Moulds

Water storage tanks and septic tanks
Chemical and fuel containers
Plastic pallets and crates
Agricultural and farm equipment housings
Playground equipment and toys
Kayaks, canoes, and marine products
Road barriers and traffic management items
Furniture (outdoor chairs, tables, planters)
Industrial machine covers and enclosures
Automotive components (ducts, consoles, reservoirs)

Benefits of Using Plastic Rotational Moulds

Uniform wall thickness â€“ Ensures product strength and durability.
Cost-effective tooling â€“ Lower mold production costs compared to injection molding.
Design flexibility â€“ Supports complex shapes, undercuts, and integrated features.
Seamless construction â€“ No joints or welds, reducing leak risks and improving aesthetics.
Ideal for large hollow parts â€“ Efficient for producing tanks and enclosures.
Low material waste â€“ Excess plastic can often be reused, reducing costs and environmental impact.
Durable end-products â€“ Resistant to weather, chemicals, and impact.
Custom finishes â€“ Textures, colors, and branding can be added directly to the mould.
Lightweight products â€“ Hollow design means strong but lightweight items.
Consistent quality â€“ Automated, repeatable process ensures uniform output.