Machining plastic is not like machining metal. Plastic has its own rules. Depending on the toughness and strength of the material being worked, machining plastic often produces long shavings. Long shavings can wind round the machine tool spindle or the workpiece, upsetting machining precision, clogging the machine and in some cases even stopping the process cycle. The problem is relatively easy to solve as the case of Wilms in Bad Essen demonstrates. This company machines plastic piping for pipelines. Pipeline sections are laid and joined end-to-end; joints must be fully leakproof. This means that the pipe ends must be machined to a high degree of precision. Pipes are machined on CNC turning machines. The shavings produced during turning are extracted directly at source to prevent them fro

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