Why manage your energy use?


Plastics injection moulding is an energy intensive process. And, because energy carries both an environmental and financial cost, it makes sound sense not to waste it.


Energy spending in a typical plastics injection moulding plant often approaches the cost of direct labour. But, while labour ranks high among management concerns, little effort is expended on controlling energy spending.


The potential savings are considerable, however. For an injection moulding plant that has implemented no effective energy reduction measures, experience shows some 30% of total energy use is discretionary. This is avoidable energy spending that can be clawed back through practical management, maintenance and investment actions.


Energy use by application in a typical injection moulding operation


Heating 2% Offices 1% Lighting 5% Water pumps 5%


Compressed air 10%


Chillers 11%


Polymer


processing 66%


The rules for saving energy are simple: spend time and effort where the returns are the greatest. That calls for a structured energy management system. Such systems will vary from one moulding plant to another but will include:


l A company energy policy; l A nominated person responsible for energy management; l A method for monitoring and targeting short and long-term performance; l An identified, costed and approved list of energy-saving projects; l A reporting system to show the status of projects; l And an auditing system to drive actions and improvement.


Read on to learn more about developing a strategy for saving energy in your injection moulding operation.


An energy saving guide for injection moulders 3


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