Proper drying is the key to ensuring quality in parts made of engineering thermoplastics. Considering how costly these materials are, it is easy to see why it is so important to have good data about what is actually happening in the drying hopper and to use that information to gain tight control over that process. A patented device called the Drying Monitor measures temperature at several different levels in the drying hopper, documenting whether or not conditions are right for proper drying. This presentation examines why this information is so important, how the device works and how it can be used to take the guesswork out of the drying process and give you a higher level of control over the quality of your products.
Material represents the single largest cost in almost any plastics processing operation. Think about it. If you have a machine processing 100 kg/hr (220 lb/hr) for 8400 hours per year, that adds up to 840,000 kg or 1,848,000 lb. If you are processing engineering resins – hygroscopic materials that require proper drying in order to develop their full mechanical properties – the material for this one machine could be costing you $4 million or $5 million per year. Next, add in labor, plant and equipment, and you begin to understand what it costs to mold or extrude every single kilo of plastics. These are truly mind-boggling numbers.