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Development of mirror-polishing process technology for difficult-to-polish materials

Tanabe Ikuo, Isobe Hiromi

Journal of Machine Engineering

2023

Vol. 23, No. 1

85--99

Mirror-polishing processes have recently been required to add high quality, high-precision precision and multi-functionality to industrial products. However, this requires skilled manual work, making it difficult to improve productivity. Automatic polishing of these products is also very difficult. Furthermore, mirror-polishing process of stainless steel, titanium and glass, which are often used in high-value-added medical products, is also difficult. Therefore, in this study, a technology for high-precision, automatic mirror polishing of three difficult-to-polish materials - stainless steel, titanium and glass - was developed and evaluated. First, the difficult-to-polish properties of different materials were considered, and then tools were developed to improve these properties and enable suitable mirror-polishing processes. Next, a polishing slurry was developed to improve the surface roughness (Rz = 0.1 μm or less). Finally, the optimum polishing conditions for the proposed mirror-polishing process were determined by design of experiment and then evaluated. It was concluded that; (1) In order to perform mirror-polishing processes of three types of workpieces, stainless steel (SUS304), titanium (pure titanium) and glass (quartz glass), new polishing tool and slurries corresponding to each material were developed and the optimum polishing processing conditions were clarified, (2) Using (1), mirror-polishing processes of each material with a surface roughness of Rz = 0.1 μm has been achieved.

Opracowanie pojemnika do przechowywania materiałów stosowanych w medycynie

Richert J., Błaszkowski M., Łubkowski D.

Przetwórstwo Tworzyw

2012

[R.] 18, nr 2

80-85

W pracy przedstawiono wytyczne do opracowania pojemnika do przechowywania chusteczek dezynfekcyjnych dla potrzeb medycyny. Badania właściwości mechanicznych wykonano metodą statycznego rozciągania, właściwości przetwórcze badano za pomocą masowego wskaźnika szybkości płynięcia (MFR), właściwości użytkowe określano metodami pomiaru przenikalności pary wodnej i skurczu wtryskowego wzdłużnego. Zaobserwowano, że największą wartość wytrzymałości na rozciąganie, naprężenia przy zerwaniu i współczynnika sprężystości wzdłużnej posiada polietylen HD-PE Liten typ BB29 H. Ponadto zaobserwowano, że tworzywo to posiada najmniejszą przenikalność pary wodnej w stosunku do badanych materiałów i niewielki skurcz wtryskowy wzdłużny. Ogólnie można stwierdzić, że wytypowane materiały zarówno na pojemnik, jak i na jego zamknięcie mogą być wykorzystane do wytwarzania pojemnika przeznaczonego do przechowywania chusteczek dezynfekcyjnych dla potrzeb medycyny.

The directives for working out of container and for storing the disinfecting handkerchiefs for medical use have been presented In this work. The mechanical research has been carried out by tensile strength measurements; the processing properties have been determined by measuring MFR index and functional properties have been determined by measuring water vapor permeation and injection-moulding longitudinal shrinkage factor behavior. It has been stated that the highest tensile strength, tensile strength at break and elasticity modulus has PE resin type Liten HDPE BB29H. Moreover, it has also been stated that this resin has the lowest water vapor permeation and low injection-moulding longitudinal shrinkage factor compared to tested materials. The summarize the problem one can say that the selected materials for container and its closure may be used for storing above mentioned objects.