Acoustic emission detection of macro-cracks on engraving tool steel inserts during the injection molding cycle using PZT sensors

Svečko, Rajko (author), Kusić, Dragan (author), Kek, Tomaž (author), Sarjaš, Andrej (author), Hančič, Aleš (author), Grum, Janez (author)

This paper presents an improved monitoring system for the failure detection ofen graving tool steel inserts during the injection molding cycle. This system uses acoustic emission PZT sensors mounted through acoustic waveguides on the engraving insert. We were thus able to clearly distinguish the defect through measured AE signals. Two engraving tool steel inserts were tested during the production of standard test specimens, each under the same processing conditions. By closely comparing the captured AE signals on both engraving inserts during the filling and packing stages, we were able to detect the presence of macro-cracks on one engraving insert. Gabor wavelet analysis was used for closer examination of the captured AE signals' peak amplitudes during the filling and packing stages. The obtained results revealed that such a system could be used successfully as an improved tool for monitoring the integrity of an injection molding process.

• Language: English
• Keywords: injection molding, process monitoring, acoustic emission, PZT sensors, piezoelectric effect
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2013
• Number of pages: Str. 6365-6379
• Numbering: Vol. 13, iss. 5
• PID: 20.500.12556/RUL-129253
• UDC: 681.586.773
• ISSN on article: 1424-8220
• DOI: 10.3390/s130506365
• COBISS.SI-ID: 16888854
• Publication date in RUL: 31.08.2021

Record is a part of a journal

• Title: Sensors
• Shortened title: Sensors
• Publisher: MDPI
• ISSN: 1424-8220
• COBISS.SI-ID: 10176278

Licences

• License: CC BY 3.0, Creative Commons Attribution 3.0 Unported
• Link: https://creativecommons.org/licenses/by/3.0/deed.en
• Description: You are free to reproduce and redistribute the material in any medium or format. You are free to remix, transform, and build upon the material for any purpose, even commercially. You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
• Licensing start date: 14.05.2013

Secondary language

• Language: Slovenian
• Keywords: injekcijsko brizganje, nadzorovanje procesa, akustična emisija, PZT senzorji, piezoelektrični efekt

Projects

• Funder: EC - European Commission
• Funding programme: European Social Fund

• Funder: Other - Other funder or multiple funders
• Funding programme: Slovenian Ministry for Higher Education, Science and Technology