FAQ for Experts. Answers by Experts.
55
Stable production with automatic dew point regulation
When processing plastic, the moisture content of the material is a deciding factor for production safety and product quality. Even more important is a defined residual or processing moisture content of the granulate, as this contributes to stable and precisely reproduceable production conditions. …
54
Can automatic air flow regulation save energy?
The comparison of traditional drying systems with more modern versions illustrates many approaches to saving energy. Particularly air flow regulation, possibly combined with lower temperatures, as well as the use of heat exchangers for regeneration and high temperature applications are valuable additional devices in this context. …
53
What are the advantages of automatic air flow regulation?
Drying plastics requires a large amount of energy. So, it makes sense to try and find ways of reducing energy consumption where possible – of course, without losing sight of the actual goal: …
52
When is a return air cooler necessary?
In issues 50 and 51 we looked at how molecular sieves – also called desiccant beds – operate and how they are regenerated.
Specifically at high drying temperatures and/or dry air dryers without automatic air flow regulation the temperature of the return air, and then also the temperature of the active molecular sieve, plays an important role. …
51
How can re-moisturisation at high air humidity be prevented?
The following basic principle applies: if plastic granulate is stored in environmental air, its moisture content will adjust to match the moisture present in the air until both moisture contents are the same. …
50
What is the purpose of molecular sieves?
Now that we have dealt with the basics of dosing, drying and conveying, we will turn to more specific aspects of drying plastics in the next few issues. …
49
How can material stress be reduced during conveying?
mo explains how material can be conveyed gently
In issues 35 and 37 we described some different forms of abrasion and signs of wear, as well as listed some possible precautions to reduce wear and abrasion. …
48
What is a diaphragm valve?
mo explains the benefits and the mode of operation of diaphragm valves
When manufacturing medical products, parts with delicate surfaces or electrical components, a completely clean production environment is a basic prerequisite. …
47
How does the material get from the storage bin into the conveying material feedline?
mo describes different types of material feeding
The way the material to be conveyed is fed into a material feedline depends heavily on the type of material and the conveying principle. …
46
How can coupling stations be monitored?
mo describes different concepts for a source-destination mapping
In issue 28 we introduced different multipoint conveying systems, including machine-related conveying systems, which are connected to the different material sources via coupling stations (or tables). …