Technology for Monitoring Extruders or Injection Molding Machines
A technology of extruder and injection molding machine, which is applied in the field of extrusion and injection molding, and can solve problems such as the inability to eliminate the influence of temperature, the measurement of plastic density or its melting state, and drastic temperature changes
Active Publication Date: 2022-03-29
KRAUSSMAFFEI TECH GMBH +1
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Problems solved by technology
Therefore, properties of plastics such as their density or their melting state cannot be measured independent of temperature
This is a great disadvantage, because especially in extruders, the temperature can vary strongly locally and it is not possible to reliably determine whether the signal change is caused by a change in a measured parameter (e.g. material density) or by a temperature change caused by
In addition, it is often not possible to determine the actual temperature situation at the corresponding measurement location
Therefore, it is often impossible to eliminate the influence of temperature on the measurement
Method used
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Embodiment Construction
[0039] Combine figure 1 A measuring system 100 for monitoring an extruder or an injection molding machine is further described in accordance with the present invention.
[0040] The measurement system 100 includes a measuring mechanism 120 and an analytical mechanism 140. If the measuring mechanism 120 and the analysis mechanism 140 are configured to be separate units, the measuring system 100 may have (wired or wireless) interface 130, which makes mechanisms 120, 140 communicate with each other by this interface. For example, the measuring mechanism 120 can be directly disposed in an extruder or an injection molding machine, while the analytical mechanism is implemented in a computer disposed outside the extruder or an injection molding machine. exist figure 1 The communication interface is shown in dashed lines. The measurement data is transmitted from the measuring mechanism 120 to the analysis mechanism 140 from the measuring mechanism 120.
[0041] figure 1 The measuring mec...
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Method and measuring system (100) for monitoring an extruder (10) or injection molding machine in operation, with: a measuring mechanism (120) designed to generate a radar wave signal and machine (10) or said injection molding machine, and detecting a response signal corresponding to said radar wave signal radiated out; and an analysis mechanism (140), which is designed to be based on said detected response signal to obtain the propagation time Δt, phase shift Δφ and / or intensity change ΔI of the radar wave signal, and based on the obtained propagation time Δt, phase shift Δφ and / or intensity change ΔI of the radar wave signal to determining at least one operating parameter of the extruder (10) or the injection molding machine, wherein the operating parameter indicates a wear state of the extruder (10) or the injection molding machine, contained in the The phase state and / or material composition of the material to be processed in the extruder ( 10 ) or in the injection molding machine.
Description
Technical field [0001] The present invention relates to the field of extrusion and injection molding. Specifically, a technique for monitoring an extruder in operation or an injection molding machine in operation is proposed. Background technique [0002] Extrusion and injection molding methods have been applied in industrial manufacturing of molded parts, especially plastic mold parts. In the extrusion field, a single screw extruder, a twin screw extruder or a multi-screw extruder can be employed. The common point of the two methods is that the plastic material to be processed is melted and compacted by increasing the temperature and pressure in an extruder or injection molding machine, thereby transforming into a plasticized (ie, deformable) state. The plasticized plastic material is then extruded through the nozzle. The difference between extrusion and injection is mainly in the molding method of molding. In the case of extrusion, the plasticized plastic material is extruded t...
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IPC IPC(8): B29C45/76
CPCB29C45/76B29C2945/7619B29C2945/76367B29C2945/76488B29C2945/76538B29C2945/76585B29C2945/76668B29C2945/76846B29C2945/76933B29C48/92B29C2948/92219B29C2948/92228B29C2948/92266B29C2948/92209B29C48/40B29C2945/76003B29C2945/7604
Inventor 奥托·斯卡拉巴拉
Owner KRAUSSMAFFEI TECH GMBH