Rotational moulding is a cost-effective manufacturing process where plastic products are cast using steel or aluminium moulds. This method produces seamless, single-piece components free from internal stress, ensuring optimal use of raw materials by achieving the desired wall thickness and structural strength. The result is highly durable, impact-resistant products. Polyethylene (PE), a thermoplastic known for its excellent chemical resistance, minimal moisture absorption, and high elasticity, is the most commonly used material, offering versatile applications.

Drawing on decades of expertise in rotational moulding since the 1980s, and supported by close collaboration with customers and suppliers, we have established ourselves as trusted specialists across the entire value chain, from design and production to quality assurance, finishing, and efficient logistics.

Key Advantages of Rotational Moulding

• Exceptional design flexibility allows for made-to-order products with complicated shapes and fine detailing, ensuring optimal function and appearance.

• Ideal for hollow products ranging from 0.1 to 45,000 litres in size.
• Seamless construction maximises strength and reduces the risk of cracks or leakage.
• Low tooling costs make small production runs economically viable.
• Integration of functional elements such as threads and bushes streamlines production.
• Excellent chemical resistance with recyclable materials.
• Lightweight yet robust components.
• Corrosion-resistant and UV-stable products.
• Customisable colours (RAL range) with consistent pigmentation.
• Approved for food contact, including potable water applications.

Rotationally moulded products are inherently hollow, constructed as a shell. Suitable applications include tanks, containers, outdoor furniture, lamps, cones, barriers, covers, pipes, splash guards, spa baths, safety boxes, outdoor toys, toolboxes, and buoys & floats. For more industry-specific details, please refer to the links on the right.

Our machines can manufacture products ranging from the size of a handball to approximately 45m³, with wall thicknesses typically between 3-30mm. The moulds we use feature low investment costs, making rotational moulding ideal for smaller production runs, starting from 1,000 units per year. Connections such as threads and bushes can often be integrated directly during the process or added later in our assembly department.

Sustainability is integral to our operations, extending beyond material selection. We focus on minimising our environmental impact through sustainable choices across materials, processes, and transportation. Our continuous efforts include optimising logistics and shipping, ensuring products are designed for shipping efficiency from the outset.

A rotational moulding mould is a hollow tool, typically made from metal such as aluminium or steel, used to shape plastic materials. The mould is mounted on a machine that rotates along two perpendicular axes while heating the plastic inside. This process ensures the even distribution of melted plastic, creating a uniform wall thickness and allowing for the production of complex parts with intricate details.

Moulds for rotational moulding can be made through methods such as CNC machining, casting, and fabrication. The choice of method depends on factors including mould complexity, size, accuracy requirements, and available resources.

The three main types of moulds in rotational moulding are Aluminium CNC, Aluminium Cast, and Steel Sheet Fabricated. Aluminium CNC machining uses computer-controlled machines to cut moulds from solid aluminium blocks, offering high precision for complex shapes. Aluminium Casting involves pouring liquid material, such as plaster or epoxy, around a pattern, then casting molten metal into the negative impression. Steel Sheet Fabrication is used for larger or irregularly shaped moulds, where metal sheets and tubes are welded together.

Venting is crucial in the rotational moulding process to release trapped air and ensure uniform wall thickness with minimal warpage. Vents are strategically placed at the top and bottom of the mould cavity to allow air to escape while preventing plastic material from flowing out.

We use high-quality plastic in powder form for rotational moulding, which undergoes thorough testing and verification. Material selection can be customised based on the specific requirements of each product, with Polyethylene (PE) typically serving as the base raw material. Unlike basic disposable plastics, our materials are designed for durability and long service life, and can be recycled multiple times.

The process

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  The process begins with the material being dispensed into a steel or aluminium mould, with common materials including polyethylene, polypropylene, and polyamide. The final product thickness is determined by the volume of material dosed, while any embedded components are integrated into the product during this stage.
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  As the plastic material heats, it melts within the mould. The dual rotation ensures even distribution, achieving the correct thickness.
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  In the cooling chamber, the melted plastic shrinks and detaches from the mould walls.
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  The mould is then opened, and the finished product is transferred to the assembly stations.