Rotational moulding (rotomoulding) is a widely used technique for creating durable, hollow plastic structures. It involves placing polymer (typically powder) into a mould that is heated and rotated along two axes. This ensures uniform wall thickness and stress-free parts upon cooling—ideal for large containers like biogas tanks.
Uniform and seamless construction, minimizing leak risk—a key requirement for gas containment.
Design flexibility: Can integrate inlet/outlet ports, reinforcing ribs, branding, or insulation layers.
Cost-effective tooling: Moulds made from fabricated steel or cast aluminium are less costly than injection-moulded tools, particularly for larger or complex shapes.
Sustainability: Minimal material waste and oftentimes recyclability of plastic powders make it eco-friendly.
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