This course provides a better knowledge of the equipment and physical phenomena used in the extrusion and granulation of polymers, and a better understanding of the operating rules.
Public :
Operating staff in charge of the operation of extruders; pelletizers and ancillary equipment.
Technical staff involved in the operation or maintenance of this kind of facilities.
Level :Skilled
Prerequisite :
To fulfill at least one of the following criteria:
to have 1 year of proven professional experience in a polymerization unit,
or to be in the process of moving to a position in operation in a polymerization unit.
Course Content
EXTRUSION OF THERMOPLASTIC - PROCESS DESCRIPTION
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Duration : 0.25 Day
Aim of the extrusion, general layout description and the various steps of the polymer treatment.
Operating principle of raw material feeding system.
Operating principle and different cross section areas: feeding system, filling, melting, degassing, compression, transport, pelletization.
Different types of screws, advantages and drawbacks.
Different types of extruders: single screw, counter-rotating or co-rotative twin screw, BUSS type mixers, advantages and drawbacks.
Operating principle of pellets conveying.
TECHNOLOGY & OPERATION OF EXTRUDERS
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Duration : 1.5 Days
Drive: motors and starters, variable speed drives, gearboxes, loads, overload safety devices, structure of the thrust bearings, auxiliaries..
Extruder: feeding systems, blockage prevention; different section of screw and barrel, adjusting the temperature; starting diverter valve and start-up operation; fouling filters monitoring and filter changing device, the die plate: technology, different heating systems, pressure monitoring, calculating the percentage of blocked holes, risk of damage. The pelletizer, different cutting systems, calculation and adjustment of knifes speed, water flow, water temperature, monitoring of pellets size/shape.
Principle of heat exchange in the die plate and temperature control.
AUTOMATION & SAFETY
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Duration : 0.25 Day
Review of the machine safety principles (flow charts, logic diagrams).
PRODUCT QUALITY
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Duration : 0.25 Day
Different grades manufactured; specifications in relation to the applications.
Laboratory tests: equipment procedures, visualization of various types of defects.
INFLUENCE OF OPERATING PARAMETERS
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Duration : 0.75 Day
Fluidity, viscosity: dynamic viscosity, definition, effect of shear rate, kinematic viscosity, melt index (MI), testing conditions, temperature effect.
Consequences: control of the temperature as a function of the polymer grade and feedrate.
Required power: the influence of the feedrate, the MI and temperature: guidelines.
Equipment reliability.
Application: troubleshooting, solutions, items to be checked.
Learning Objectives
Attendees will be able to implement the following skills:
Describe the phenomena involved in an extruder,
Explain settings,
Assign the role of safety and automation.
Ways & Means
The content may be customized for a particular type of machine or for products if information is provided in advance.
Otherwise, standard products are covered: PolyEthylene, PolyPropylene. It can be implemented on specialties polymers and compounds.
Case studies based on industrial cases.
Learning assessment
Quiz.
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Coordinator :IFP Training instructors, with expertise in the field and trained in modern teaching methods adapted to the specific needs of learners from the professional world.
To French entities : IFP Training is referenced to DataDock ; you may contact your OPCO about potential funding.
Please contact our disabled persons referent to check the accessibility of this training program : referent.handicap@ifptraining.com
IFPT Account
