Rotational Moulding Companies

What is Rotational Moulding?

Rotational moulding, also known as rotomoulding, is a manufacturing process that creates hollow plastic parts by rotating a heated mould around two perpendicular axes. Plastic powder is placed inside the mould, which is then heated whilst rotating slowly in an oven. The centrifugal force and heat distribute the melted plastic evenly across the mould walls, creating seamless, hollow parts with uniform wall thickness.

This process is particularly well-suited for producing large, hollow items that would be difficult or expensive to manufacture using other methods. The low-pressure nature of the process means relatively inexpensive moulds can be used, making it cost-effective for both prototyping and medium-volume production runs.

For a more detailed explanation of the rotational moulding process, materials, and design considerations, read our comprehensive What is Rotational Moulding? guide.

Benefits of Rotational Moulding

Rotational moulding offers distinct advantages over other plastic manufacturing processes, particularly for hollow parts and medium-volume production, including:

• Cost-Effective Tooling - Rotational moulding requires significantly lower tooling costs compared to injection moulding, making it economical for medium-volume production and large parts. Moulds can be fabricated from aluminium or steel at a fraction of the cost of injection moulding tools.
• Design Flexibility – The process allows for complex shapes, including parts with varying wall thickness, internal features, and undercuts that would require expensive side actions in injection moulding. Multiple parts can often be moulded simultaneously in one cycle.
• Seamless Construction – Parts emerge as single, seamless pieces without weld lines or joint areas, providing superior strength and eliminating potential leak points. This is particularly valuable for tanks, containers, and outdoor products.
• Excellent Material Distribution – The rotation process ensures even material distribution and consistent wall thickness throughout the part, resulting in uniform strength and appearance without thin or weak areas.
• Stress-Free Parts – The low-pressure, low-temperature process creates parts with minimal internal stress, reducing the likelihood of cracking or warping over time, particularly important for large outdoor applications.
• Material Efficiency – The process generates virtually no waste material, as any excess powder can be reused. This makes rotational moulding an environmentally friendly option with excellent material utilisation.
• Large Part Capability - Rotational moulding can produce very large parts that would be impossible or extremely expensive with other processes, including tanks up to several thousand litres capacity.

Applications of Rotational Moulding

Rotational moulding serves industries requiring hollow, durable plastic products, particularly where seamless construction and cost-effective production are priorities, including:

• Storage and Transportation - Water tanks, chemical storage vessels, wheelie bins, industrial containers, and fuel tanks requiring leak-proof construction and chemical resistance.
• Playground and Leisure - Play equipment, slides, climbing frames, and outdoor furniture benefiting from seamless, safe construction with no sharp edges or weak joints.
• Agricultural and Horticultural - Feed bins, water troughs, planters, and agricultural tanks where durability and weather resistance are essential.
• Automotive and Marine - Fuel tanks, air ducts, mudguards, and boat hulls requiring complex shapes and excellent chemical resistance.
• Medical and Pharmaceutical - Portable medical equipment housings, pharmaceutical containers, and healthcare furniture requiring easy cleaning and chemical resistance.
• Industrial Equipment - Machine housings, ducting systems, protective covers, and specialised containers for manufacturing environments.

Why Use PlastikCity to Source a Rotational Moulding Company?

PlastikCity connects you with vetted rotational moulding companies across the UK and Ireland. All suppliers in our network undergo rigorous assessment where we verify financial stability, service quality, and reputation to ensure you connect with reliable, professional partners. Submit one enquiry and receive quotes from multiple rotational moulding specialists. This saves significant time compared to contacting suppliers individually whilst ensuring competitive pricing. The service is completely free for buyers with no hidden costs or commissions.