Measurement and diagnostics of geometry of flock materials

• Main Authors: L. Gegeckienė, E. Kibirkštis, N. Buškuvienė, S. Havenko, A. Sudintas, L. Ragulskis
• Format: Article
• Language: English
• Published: JVE International 2013-03-01
• Series: Journal of Measurements in Engineering
• Subjects: flock printing material; diagnostics; quality improvement; measurement; measurement of eigenmode; identification of eigenmode; upper surface; image analysis; gaps; excitation of vibrations; experimental setup; photoelement; finite elements
• Online Access: https://www.jvejournals.com/article/10006
• ISSN: 2335-2124; 2424-4635

The method of investigation of morphology of the surface of flock materials using a photoelement is proposed. Two methods which enable to improve the quality parameters of such materials in the process of their production are investigated. They are based on excitation of a tape of flock material by using vibrations of definite characteristics using different types of vibration exciters. Diagnostics of geometrical locations of glued hairs on the surface of flock material has been performed. It is shown that by exciting definite modes of vibrations on the surface of flock material it is possible to make the hairs glued on the surface of the tape of flock material more continuous and straighter. It is assumed that flock material consists from a number of narrow two dimensional elastic strips with the displacements of the corresponding nodes in the direction of the x axis of adjacent strips being mutually equal. Also in another model of flock material it is assumed that flock material consists from a number of narrow two dimensional elastic strips and between them there are narrow gaps. The gaps are assumed to have small stiffness in the direction of the x axis. For both models of flock material the first eigenmodes are determined and investigated. The obtained results indicate that from the locations of elastic elements with respect to each other on the upper surface of flock material it is sometimes possible to identify the number of eigenmode. So the measurement of the number of excited eigenmode can be performed from the interpretation of the image of the upper surface of flock material. But sometimes the image indicating the motion of elastic elements over their length is required. The obtained results are used in the process of measurement of eigenmodes performing design of packages made from flock material.