Cost Saving Levers in Polymer Machining

The advancement of polymer engineering has seen an explosion over the last few decades. In a space earlier dominated by simpler thermoplastics – such as Polypropylene, Nylon, Polyethylene, and PVC – we have seen the development, adoption, and later the commercialisation of more advanced materials such as PTFE (Teflon), PEEK, POM, and PPS, to name only a few.

The increase in available choices led to the need to understand, process, and fabricate these new polymers, with the challenge being that each material behaved differently and therefore required its own set of parameters to be respected, if a consistent end-product was to be obtained.

With each polymer, unique nuances were observed so that as time went by, we developed the ability to know what to expect before embarking on any new developments. As the experience grew, we began to notice certain levers that allowed us to optimise our costs and pass these savings on to our customers.

In a nutshell, we have observed anywhere between a 25% and a 60% saving when we have developed parts for export clients. These savings are not restricted simply to the fact that costs are lower in India, where we operate. Instead, the levers extend beyond this to other aspects of cost optimisation that clients are often unaware of and where our expertise lies.

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Material selection

One of the main cost drivers of any polymer component is the material itself. Niche polymers can be prohibitively expensive. For example – PEEK stock shapes sell for upwards of US$100 per Kg, compared with, say, stainless steel, which can be bought for ~US$3.

In addition to this, branding exercises by polymer companies have allowed names like Rulon and Iglidur to add a layer of opacity to the base polymer and allowed them to command a huge premium on price.

By engaging not only in part development but also in grade and material tracing, Poly Fluoro has been able to identify the root polymers and overall grade composition and develop lower cost substitutes using local and/or generic materials. This is all done keeping performance in mind, so the substitute can be extensively tested by the client before they switch over from their current material.

Cost saving: 10-60%

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Machining Costs

It is no doubt that costs in India – where we operate – are significantly lower than in the US and Europe. As a result, when part complexity increases, the cost differential does so too. For parts that require upwards of five minutes to machine, the difference more than eclipses the cost of freight for a company sourcing from India.

Cost saving: 15-40%

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Tooling Costs

Apart from machining, the cost of tooling can also be localised and optimised. Especially for polymers, the requirement of specialised tooling can be expensive and/or require a certain understanding of the material in order to achieve consistency.

For example – machining PTFE+Carbon+Graphite is challenging, causing significant tool wear out and requiring regular machining inserts to be changed every 5-10 parts. Further, if the insert wears out faster, you may lose a part, as the dimensions are out of tolerance. In order to address this, special tooling must be made in order to take the higher wear rates. From 5-10 parts, a modified tool tip can offer an increased yield of 200-300 parts, representing a high saving in costs.

Cost saving: 5-15%

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Overheads

Like machining costs, overheads too are lower in India. In order to churn out consistent quality, the right people, instruments, QMS, and gauges need to be developed and maintained. Further, complex parts need to be well understood so that potential non-conformities can be evaluated and addressed before commencing large scale production. Poly Fluoro has a team in place to ensure that when parts leave our premises, there is no question that they conform to the client specifications.

Cost saving: 10-25%

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Process improvements

Finally, as we stated earlier, while lower costs do account for a significant saving for our clients, there is an immense potential for cost optimisation via process improvements. At Poly Fluoro, we are constantly re-thinking our manufacturing methods to help us streamline our per-part consumption, cycle times, tooling costs, and supply chain. These are continual improvements made as a practice, which in turn allows us to support our clients when they need it.

Cost saving: 15-30%

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Poly Fluoro Ltd is a globally recognized leader in the field of engineering plastics. Over the last thirty years, we have built our brand on quality, innovation, and outstanding customer service. Our customer base today includes some of the world’s largest Original Equipment Manufacturers (OEMs).

260A, Bommasandra Industrial Area Hosur Road, Bangalore Karnataka, India Pin: 560 099
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