{"id":278,"date":"2016-03-30T14:57:39","date_gmt":"2016-03-30T14:57:39","guid":{"rendered":"http:\/\/www.plastikcity.co.uk\/blog\/?p=278"},"modified":"2016-11-11T11:18:50","modified_gmt":"2016-11-11T11:18:50","slug":"20-off-your-next-moulding","status":"publish","type":"post","link":"https:\/\/www.plastikcity.co.uk\/blog\/20-off-your-next-moulding\/","title":{"rendered":"20% Off Your Next Moulding"},"content":{"rendered":"

Guest Blog by Richard Webster of Plastic-IT<\/em><\/p>\n

Most plastic injection mouldings that are produced today are still compromised when compared to what they could be in terms of fully optimised product….<\/span><\/strong><\/p>\n

<\/p>\n

Just take one example of the fact that most part geometry \u2013 even though it is created in modern 3D CAD systems – has wall thicknesses that are round figure dimensions such as 3mm, 2.5mm or 2mm etc.\u00a0 This indicates that the wall thickness decision is based on nothing more than\u2026\u2026??\u00a0 Well it is certainly not based on the minimum that could be moulded or the minimum that the physical performance requires; but if it was, it would reduce costs enormously.<\/p>\n

What happens if the polymer supplier calls to say that the price of \u2018Polywarpylene\u2019 is increasing by 5% next week?\u00a0 Major discussions would ensue between supplier and customer; because such an increase is, \u201c\u2026 totally unacceptable!!!\u201d<\/p>\n

So what if I tell you that most injection moulded parts could easily be 20% cheaper and you would not notice?\u00a0 Well, consider a 3mm thick part \u2013 designed to a nice comfortable round figure based on the fact the last part that was similar in design was 3mm and worked well.<\/p>\n

Why not make it 2.7mm thick??\u00a0 That\u2019s 10% less polymer (puts the row over a 5% price increase into perspective!)\u00a0 But more than a wall thickness reduction – \u00a02.7mm will cool around 12% – 15% faster than 3mm.\u00a0 So, whichever way you slice the ratio of plastic to production cost, the new thinner parts will be at least 20% cheaper.<\/p>\n

When was the last time someone offered you a cost reduction like this??\u00a0 Probably never.<\/p>\n

Now if you are an astute supplier you can probably double your profits with this technique.\u00a0 How? Well the price you are getting for your products now has been greatly influenced by your competitors.\u00a0 You won the business by beating them \u2013 read that as \u2018undercutting them\u2019.\u00a0 The net result that if you are making 5% on sales you are doing well \u2013 but let\u2019s suppose you are.\u00a0 By reducing the wall thickness and consequentially the production time you can increase this margin to at least 20%.\u00a0 Give half to your customer as a cost down and keep the remaining 10%, thereby doubling your profitability.<\/p>\n

\u201cOK that\u2019s all very well but the parts won\u2019t be as strong \u201c, you say.\u00a0 Strictly speaking you are correct \u2013 but what is the strength requirement.\u00a0 I can guarantee that if the product had been optimised for strength based upon the design load cases then the wall thicknesses would not be expressed in nice round numbers.\u00a0 That fact is a good giveaway.\u00a0 Very few parts are ever subjected to development through the application of stress analysis (yet we have been designing, bridges, planes, ships and cars using these technologies for decades).\u00a0 Why?\u00a0 Because it is so difficult to determine the load cases for the moulded part\u2019s life performance; and that is mostly because we have not done a lot of stress analyses on plastic parts!<\/p>\n

Optimisation of product design means using the least amount of material that will enable the product to perform its fit and function requirement without failure during warranty.<\/p>\n

You don\u2019t get optimum parts by plucking wall thickness values out of thin air!<\/p>\n

To learn more about how to achieve these cost reductions through optimisation of product design and production send us a mail at sales@plastic-it.co.uk<\/a>.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

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