The Affiliation of Rotational Moulding Organisations (ARMO) was established to provide an equal forum for organisations serving the global rotational moulding industry. ARMO is a voluntary group of organisations servicing the global rotomoulding industry, each having their individual memberships and structure. The members of the affiliation will work together to advise the industry through their individual organisations, however the vision of ARMO is to work co-operatively on various projects for the benefit of all members.

This website aims to provide information relating to the structure of ARMO, its members and key events and information relating to the global rotational moulding community and the plastics industry as a whole.

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What is Rotomoulding

Rotational moulding is a process used to manufacture hollow plastic products from simple to very complex shapes. Rotational molding has many advantages in terms of relatively low levels of residual stresses and inexpensive molds. Rotational molding also has few competitors for the production of large (> 2 m3) hollow objects in one piece. The process is best known for the manufacture of rainwater tanks but it can also be used to make complex medical products, toys, leisure craft, and highly aesthetic point-of-sale products. The rotomoulding process transforms plastic from either powder, pellet or liquid form into products in four major steps. The mould is heated, rotation takes place on two axis, the mould is cooled and emptied then refilled for the next cycle. Major international designers have use rotational moulding to produce stunning products for hundreds of different sectors.

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Letter from the ARMO Chair

It is an honor for me to write to you as the first female ARMO Chair. With 20 years of personal experience in Rotational Molding, I am pleased to see that we are all united in our efforts to seize upon opportunities for growth and development within our industry. Together with the ARMO board, we have focused on the structure needed to support these opportunities and prepare us for the future. We have established three working groups, dedicated to governance, marketing, and market intelligence.

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Rotomolding’s Modern Edge The State-of-the-Art

The rotational molding industry weaves a thread through an eclectic mix of industries worldwide. While they are all connected through the elements of the basic process, they are often completely unconnected in terms of application and final requirements: the flexibility and wide-ranging capability of rotomolding allows for varying size and complexity that is unmatched by any other plastic manufacturing process.

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Solid Designs with Rotational Molding

Although rotational molding could be traced back to ancient Egypt for slurry casting of pottery, the technology wasn’t applied to plastics until the 1940’s and 1950’s during which time it was used to mold dolls in PVC. A decade later in he 1960’s the Engel process, which originated in Europe, was applied to molding LDPE for large hollow containers.

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Designing with Rotational Moulding

There are several processes for transforming plastic granules into plastic parts. Choosing an appropriate material and converting process depends on the application, end use, life expectancy, volume of production and many more parameters.

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