摘要:
Some embodiments are directed to a system for detecting foreign matter in a parison discharged successively from a discharge device, the system comprising: infrared cameras that detect infrared beams emitted from the parison; and a determination unit that determines whether foreign matter is present in the parison on the basis of the infrared beams detected by the infrared cameras. A determination area is set in the parison in a discharge direction of the parison, a storage unit is provided that stores an infrared threshold set for the determination area, and the determination unit compares the detected values from the infrared cameras with the threshold.
摘要:
An extruder configuration system is disclosed. The system includes an extruder information database including details of extruders, extruder elements and extruder barrels, a user interface configured to receive user inputs including user choices of extruders, extruder elements or extruder barrels from the extruder information database, the user interface further configured to receive extruders, extruder elements or extruder barrels for addition to the extruder information database, an element positioning engine including a database of incompatible elements and configured to review user choices and prevent positioning of incompatible extruder elements adjacent to each other on an extruder, a processor configured to create an extruder configuration based on user inputs and a display module configured to display the extruder configuration.
摘要:
A measuring device for detecting the state of wear of the bore walls of two interpenetrating housing bores, having mutually parallel bore axes, of at least two-shaft screw extruders has a carriage provided with rear drive wheels, front guide wheels and contactlessly operating distance sensors which can each be pivotally driven about a bore axis and can be positioned at a distance from the respective bore wall.
摘要:
A system and method for measuring viscosity, melt flow index (MFI), and melt volume rate (MVR) of a polymer melt in real-time during an extrusion process to provide quick and accurate feedback for process control. The system includes a polymer processing rate sensor (36), a polymer melt temperature sensor (30), an extruder pressure sensor (32), and a die head temperature sensor (34) for taking in-line measurements during the extrusion process. The in-line measurements are made on the main process stream of the polymer melt, with the determination of viscosity, MFI, and MVR based on these measured values and those obtained during a calibration run with polymers having known properties. The invention can be used in any polymer compounding and extrusion process utilizing die opening with any constant geometry for monitoring quality and providing feedback for process control.
摘要:
A system and method for measuring viscosity, melt flow index (MFI), and melt volume rate (MVR) of a polymer melt in real-time during an extrusion process to provide quick and accurate feedback for process control. The system includes a polymer processing rate sensor (36), a polymer melt temperature sensor (30), an extruder pressure sensor (32), and a die head temperature sensor (34) for taking in-line measurements during the extrusion process. The in-line measurements are made on the main process stream of the polymer melt, with the determination of viscosity, MFI, and MVR based on these measured values and those obtained during a calibration run with polymers having known properties. The invention can be used in any polymer compounding and extrusion process utilizing die opening with any constant geometry for monitoring quality and providing feedback for process control.
摘要:
The present invention is directed to a blown film extrusion apparatus in which film is extruded as a tube from an annular die and then pulled along a predetermined path. The improved blown film extrusion apparatus includes a system for gauging and controlling the surface of the extruded film tube, which includes a number of components which cooperate together. At least one transducer is provided and positioned adjacent the extruded film tube for transmitting interrogating pulses to, and receiving interrogating pulses from, the extruded film tube, and for producing a signal corresponding to a detected position of the extruded film tube. A control system is provided for substituting a filtered position signal derived from a dynamic filtering process in lieu of the detected position signal. An air flow controller is provided for varying a quantity of air within the extruded film tube in response to the control system for urging the extruded film tube to a desired position.
摘要:
A control system for a dynamic extruder wherein the pressure of the plastic melt is monitored and compared to a set point. When the melt pressure is equal to or greater than the set point, the supply of plastic to the extruder is halted, thereby preventing any increase in melt pressure and thereby precluding rupture of the extrusion die due to excess pressure.
摘要:
Disclosed is a method of detecting faults or discontinuities in the insulating or dielectric properties of an extruded tube. A high voltage potential is established between a ring which surrounds the tube as it emerges from the extrusion die and the extrusion core. Any conduction between the ring and the core unbalances a bridge network which then activates a relay to indicate the presence of a fault or discontinuity. A die or paint sprayer or a warning device may also be controlled by the relay to mark the location of the fault or defect.