Comprehensive areal geometric quality characterisation of injection moulded thermoplastic gears
ID Urbas, Uroš (Author), ID Zorko, Damijan (Author), ID Vukašinović, Nikola (Author), ID Černe, Borut (Author)

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Injection moulding is currently the most widely employed production method for polymer gears. Current standardised gear metrology methods, which are based on metal gear inspection procedures, do not provide the key information regarding the geometric stability of injection moulded gears and are insufficient for a thorough gear inspection. The study developed novel areal quality parameters, along with a so-called moulding runout quality parameter, with a focus on the injection moulding method. The developed parameters were validated on twenty-nine gear samples, produced in the same moulding tool using various processing parameters. The gears were measured using a high-precision structured-light 3D scanner. The influence of injection moulding process parameters on the introduced novel quality parameters was investigated. The developed moulding runout quality parameter proved to be effective in evaluating the shrinkage that can occur in the injection moulding process. The novel moulding runout parameter returned an average value of −21.8 μm in comparison to 29.4 μm exhibited by the standard parameter on all the gears, where the negative value points directly to mould shrinkages. The rate of cooling was determined to be the most influential factor for the shrinkage of the gear. The developed areal parameters demonstrated to be advantageous in characterising the deviations on the teeth more comprehensively.

Keywords:gear metrology, injection moulding, geometrical quality parameters, polymer gears
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Publication status:Published
Publication version:Version of Record
Number of pages:19 str.
Numbering:Vol. 14, iss. 4, art. 705
PID:20.500.12556/RUL-135121 This link opens in a new window
ISSN on article:2073-4360
DOI:10.3390/polym14040705 This link opens in a new window
COBISS.SI-ID:97321219 This link opens in a new window
Publication date in RUL:23.02.2022
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Record is a part of a journal

Shortened title:Polymers
Publisher:Molecular Diversity Preservation International
COBISS.SI-ID:517951257 This link opens in a new window


License:CC BY 4.0, Creative Commons Attribution 4.0 International
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:12.02.2022

Secondary language

Keywords:zobniško meroslovje, injekcijsko brizganje, parametri geometrijske natančnosti, polimerni zobniki


Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Funding programme:Young researchers

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Project number:Z2-3208
Name:Zobniki iz trajnostnih biološko osnovanih kompozitov – razvoj in vrednotenje zmogljivosti na podlagi nadgrajenih eksperimentalnih analiz in numeričnih simulacij

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Project number:Z2-3207
Name:Hitra karakterizacija dinamične korenske trdnosti polimernih zobnikov

Funder:Drugi - Drug financer ali več financerjev
Funding programme:Republic of Slovenia
Project number:C3330-18-952014

Funder:EC - European Commission
Funding programme:European Regional Development Fund

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