From polyethylene powder to finished product: the rotomoulding process behind every Kewat tank, boat and planter.
Rotomoulding (rotational moulding) is a way of making hollow plastic products. Instead of pushing hot plastic into a mould under pressure, we put plastic powder inside a hollow mould, heat it, and turn it slowly in two directions at once.
As the powder melts, it coats the inside of the mould and builds up evenly, layer by layer. Once it has cooled, the mould opens and the finished product comes out.
It suits large, hollow shapes best, which is why it is used for water tanks, boats, kayaks and planters.
Plastic powder coats the inside of the mould to create a hollow product.
STEP 1
Polyethylene powder, in the colour of the finished product, is measured and loaded into a hollow metal mould. The mould is then closed.
STEP 2
The mould moves into an oven and turns slowly on two axes. The powder melts and coats the mould walls evenly.
STEP 3
The mould keeps turning as it cools, allowing the plastic to set and hold its shape.
STEP 4
The mould opens and the newly formed product is lifted out.
STEP 5
The product is trimmed, accessories are fitted where required, and quality checks are completed before dispatch.
A versatile manufacturing process for durable, large and hollow polyethylene products.
Turning the mould distributes melted polyethylene over its inside surfaces.
Polyethylene does not rust or corrode and handles knocks well.
A versatile process for products ranging from planters to large tanks and boats.
Polyethylene can be recycled. Confirm Kewat's current recycling practices before making specific claims about factory offcuts or returned products.
Explore products made for water management, marine use, agriculture and outdoor spaces.
Kewat Industries works in partnership with ROTO Group (Slovenia).
