saujs Sakarya University Journal of Science 2147-835X Sakarya University 10.16984/saufenbilder.879543 Mechanical Engineering Makine Mühendisliği Impact of Dehumidification Devices on Production Efficiency in Plastic Injection https://orcid.org/0000-0003-4952-0595 Oktaç M. Tahir SELÇUK ÜNİVERSİTESİ, FEN BİLİMLERİ ENSTİTÜSÜ, MAKİNE EĞİTİMİ (YL) https://orcid.org/0000-0002-4569-0450 Timur Mustafa ADNAN MENDERES UNIVERSITY https://orcid.org/0000-0001-6182-356X Kılıç Halil KIRKLARELI UNIVERSITY 10 30 2021 25 5 1129 1135 02 18 2021 08 05 2021 Copyright © 1997, Sakarya University Journal of Science 1997 Sakarya University Journal of Science

One of the many methods used in the production of plastic materials is plastic injection method. The plastic injection method needs equipment difficult to choose, and it is also costly. Many negativities could be experienced during production. One of them is the water droplet problems on the surfaces of the mould. Provision of insufficient cooling on moulds, ambient temperature, non-homogenous humidity, mechanical and other stresses occurring during production, cracks on the product, warpage and thermal residual all cause some stress-like defects. In this study, the effect of water droplets problem on production efficiency in the moulds of Polyethylene Terephthalate (PET) raw materials manufactured in a private enterprise was examined. The percentage productivity table has been created based on different months of the year, August July and August. In the enterprise, 8 dehumidifiers were placed to 17 injection machines to create a homogeneous production temperature in the environment. Humidity and heat values obtained during production were monitored daily and recorded. In this study, which was conducted over two years and three months, results were obtained suggesting that the water droplets formed in injection moulds has decreased with the effect of dehumidification devices, and the efficiency of injection production has also increased.

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