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Dynamic distance measurement and dynamic positioning
3 December 2024
18 November 2024
24 November 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 November 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 November 2021
  Spray jet control in transmitted lightWhen designing spray systems, it is important to ensure that the sensor technology is matched to the size of the spray cone and the spray volume of the application in question. Furthermore, the geometry of the spray cone and the spray quantity depend on the medium used (primer, adhesive, solvent, water, alcohol, paint, etc.) as well as on the spray nozzle opening, the overpressure and the spray quantity dosage. Particularly when using tough, adhesive media (glue) as a spraying agent, it can happen that part of the spray nozzle opening sticks, which leads to a change in both the spray quantity and the spray geometry. As a result, the spray jet can be changed in terms of direction as well as opening angle. When designing a spray jet control system, it is important to address some key questions. ► Press release (Word/pdf) |
 A-LAS-CON1 L-LAS-TB-...-AL-SC Series SI-JET Series SPECTRO-1-CONLAS SPECTRO-1-FIO Series SPECTRO-1-FIO-JC |
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