Raziskava spajanja kovin in polimerov z uporabo laserskega mikrostrukturiranja in injekcijskega brizganja

Blatnik, Andraž (author), Jezeršek, Matija (mentor)

Namen raziskave je izboljšanje nosilnosti spojev med kovino in polimerom. Pri tem je uporabljeno lasersko graviranje z vlakenskim laserjem, kjer smo s pomočjo laserja naredili utore tipičnih širin 40 μm in globin 30 μm. Izdelani sta bili dve kombinaciji spojev: aluminij + TPE in aluminij + PA46, kjer smo uporabili različne variacije parametrov injekcijskega brizganja. Nosilnosti spojev smo izmerili s pomočjo nateznega preizkusa, kjer smo merili maksimalno silo in raztezek spoja pred porušitvijo. Meritve so pokazale izboljšanje nosilnosti spoja. Kombinacija aluminija in TPE pri zvišani temperaturi 90 °C izboljša nosilnost spoja za 38%. Spoj aluminija in PA46 je imel najboljšo nosilnost pri povišanem naknadnem tlaku 500 bar, ki je pokazal 84% boljšo nosilnost. Spreminjanje parametrov brizganja je razkrilo težavo z neustrezno oblikovanimi brizganimi izdelki, pri katerih so nastali notranji defekti polimera TPE. Nepravilno brizgani izdelki so tako negativno vplivali na nosilnost spoja.

• Language: Slovenian
• Keywords: lasersko graviranje, polimeri, aluminij, jeklo, TPE, PA46
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Year: 2026
• Number of pages: XX, 42 str.
• PID: 20.500.12556/RUL-179936
• UDC: 621.9:621.9.048.7:667.6(043.2)
• COBISS.SI-ID: 270042371
• Publication date in RUL: 27.02.2026

Secondary language

• Language: English
• Title: Research on joining metals and polymers using laser microstructuring and injection molding

Abstract

This research aimed to improve the load-bearing capacity of joints between metal and polymer materials. Laser surface structuring using a fiber laser was employed, where grooves with typical widths of 40 μm and depths of 30 μm were produced on the metal surface. Two joint combinations were fabricated: aluminum + TPE and aluminum + PA46, using different variations of injection molding parameters. The load-bearing capacity of the joints was evaluated by tensile testing, during which the maximum force and elongation of the joint prior to failure were measured. The results showed a significant improvement in joint strength. The aluminum + TPE combination exhibited a 38% increase in load-bearing capacity at an elevated temperature of 90 °C. The aluminum + PA46 joint achieved the highest load-bearing capacity at an increased holding pressure of 500 bar, resulting in an 84% improvement. Variation of the injection molding parameters revealed issues related to improperly formed molded parts, leading to internal defects in the TPE polymer. These improperly molded specimens negatively affected the load-bearing capacity of the joint.

• Keywords: laser technique, polymers, aluminium, steel, TPE, PA46