How to Set Up & Maintain An Efficient Resin Handling System
Materials represent the single largest expense in most plastics processing facilities. In today’s world, having a reliable resin-handling and conveying system is as important as having reliable electrical power. Design, maintenance, and operation of the system can have everything to do with how well it meets production goals and objectives. Some systems can be quite big and complex, and it is always a good idea to get the advice of experienced system specialists. From design to installation to start-up and ongoing operation, their knowledge can help you avoid problems and get the most from your system.
The following hints and tips can help you get things right if you choose to design and install a system yourself, or they can help you prepare for a constructive conversation with a system supplier.
First: Identify all of the materials that you process in your plant and where each material comes from. Refer to those silos, bins, and gaylord boxes as “sources.” Keep in mind that blenders and dryers may also be considered sources if loaders are pulling material from them.
Second: Make a complete list of every molding or extrusion machine in your plant and identify them as “destinations.” In this context, the hopper of a dryer or the material bins on a blender are considered destinations, since the system will be delivering material to them.
Third: Determine the maximum throughput rate (weight/hour) for each destination. The sum of these throughput rates, plus a factor for each 90° bend in the system and the horizontal and vertical distances that material must travel, will give you an indication of how large a vacuum pump will be needed and what diameter the conveying lines should be. Your equipment supplier can help perform these calculations and recommend the ideal pump(s) for your application.