Rotational Moulding



Rotational moulding is an industrial process used for thermoplastic transformation.

This process can be used to produce simple parts that are far more complex than those produced using injection, blowing and vacuum processes in the industrial transformation of thermoplastic material.

This process is able to produce parts with specific characteristics, such as those that are completely sealed or hollow, and of sizes ranging from coin-sized to as large as a 25,000-litre silo. This process makes it is possible to produce parts using polyamide polyethylene, PVC, polycarbonate or any other type of thermoplastic. 

As suggested by the name of the process, parts - or series of parts - are produced through the rotating motion of a mould. Moulds generally rotate bi-axially, that is, in two simultaneous axes, and the mould can either be heated, or not, during the process. Machines that function by swinging the mould on its horizontal axis while also turning it clockwise and counterclockwise can be used for this process. 

Moulds used in rotational moulding processes can be aluminium or steel and must be shaped like the product desired. The process is made up of four distinct phases:   

1. Mould loaded with raw material 

2. Mould heated 

3. Mould cooled (when previously heated) 

4. Part removed from mould.   

Molde Matos S. A. is able to produce moulds ranging from 30kg all the way up to 32,000 kg.   

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