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Mesure dynamique de la distance et positionnement dynamique
03.12.2024
18.11.2024
24.11.2021
.png){kind=small} Quality control of laser filtersWith the mobile vision system LUMI-STAR-MOBILE-VIS/VIS Laser filters are static filter screens made of hardened special steel with a wall thickness of typically 1.5mm, which also have closely spaced conical holes created with focused laser light.
The task of the laser filter is to efficiently remove unwanted impurities from the plastic melt during the extrusion process. In conjunction with rotating scrapers, the dwell time of the impurities is kept as short as possible. The continuous screen cleaning even removes so-called soft particles (e.g. made of silicone or rubber) from the plastic flow, and the short dwell time of the impurity particles also prevents the formation of cracking products and the resulting black dots. However, lasering can lead to unwanted filling of the conical holes, which results from the molten metal not being able to leave the conical area in time and instead solidifying, which can lead to partial or, in extreme cases, complete blockade of individual holes. The LUMI-STAR-MOBILE-VIS/VIS mobile vision system enables simple and efficient inspection of the laser filter screens. (...) |
.jpg) Mobile Inspection of Lasered Filter Screens With the Help of a Smartphone with Upstream Optics and Lightning Unit |
18.11.2024
| Defect detection in a transparent hose Monitoring of transparent plastic hoses with regard to possible contamination by black particles During the production of transparent plastic hoses, black particles (flakes) with a diameter of 0.3mm to 1mm may be deposited on the inner wall. The position of the particles is purely random. The plastic hoses should already be checked during production. The transparent hose (diameter 4mm and wall thickness 0.7mm) is produced at a speed of 270m/min.
In order for the black particles to be reliably detected, a correspondingly high scanning frequency of the sensor and the control electronics used is required. The A-LAS-N-F08-10/50-3x0.5 laser analog light barrier in conjunction with the SPECTRO-1-CONLAS control electronics provides a unit that has the required scanning frequency (approx. 200 kHz) and the necessary laser light curtain (3mm x 0.5mm). Inspection and detection are carried out in transmitted light mode. If there is a black particle in the field of view, the amount of light on the receiver side is reduced, whereby the analog signal is compared with a comparator threshold that can be parametrized using the SPECTRO 1 Scope V3.1 Windows® software after digitization. (...) |
%20Detection%20of%20black%20particles_Titelbild-EN.jpg) In Search of Black Particles in Transparent Plastic Hoses With the Help of Ultra-fast A-LAS Laser Sensor Technology |
24.11.2021
  Contrôle du jet de pulvérisation dans une lumière traversanteLors de la conception de systèmes de vaporisation, il faut veiller à ce que les capteurs soient adaptés à la géométrie du cône de vaporisation et la quantité vaporisée de l’application respective. En outre, la géométrie du cône de vaporisation ainsi que la quantité vaporisée dépendent du fluide utilisé (apprêt, colle, solvant, eau, alcool, peinture, etc.) ainsi que de l’ouverture de pulvérisation, de la surpression et du dosage de la quantité vaporisée. Notamment lors de l’utilisation de fluides visqueux et collants (colle) en tant que produit vaporisé, il peut arriver qu’une partie de l’ouverture de pulvérisation se colle, ce qui conduit à un changement à la fois de la quantité vaporisée et de la géométrie de pulvérisation. Le jet de pulvérisation peut ainsi être modifié au niveau du sens et de l’angle d’ouverture. Lors de la conception du système de contrôle du jet de pulvérisation, il est important de se poser quelques questions centrales. ► Communiqué de presse (Word/pdf) |
 A-LAS-CON1 Série L-LAS-TB-...-AL-SC Série SI-JET SPECTRO-1-CONLAS Série SPECTRO-1-FIO SPECTRO-1-FIO-JC |
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