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All Journal Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Muhammad Ikhwan
Department of Plastic and Rubber Processing Technology, Politeknik ATK Yogyakarta, Yogyakarta, Indonesia

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STRATEGY FOR REDUCING HDPE MATERIAL PRODUCT DEFECTS IN THE INJECTION MOLDING PROCESS WITH TAGUCHI METHOD Muhammad Ikhwan; Diana Yuliastuti
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 23 No. 2 (2024): Berkala Penelitian Kulit, Sepatu, dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/m9njc905

Abstract

We often encounter injection plastic products around us. Some of the advantages of plastic materials are lightweight, flexible, multipurpose, strong, not reacting, not rusty, thermoplastic (heat seal), can be colored and the price is cheap. The production process that is often used in the plastic industry is Injection Molding. In the Injection Molding process, the determination of machine parameter settings greatly affects the quality of production results. Determination of the right parameter settings can reduce the defect on the resulting product. This research was made as an effort to reduce the percentage of defects in the injection molding process with the Taguchi method. The research was conducted at the Plastic Workshop of ATK Polytechnic Yogyakarta using an Injection Molding machine type SM 90 HCV. The raw material used in this study is High-density polyethylene (HDPE) with the resulting product output in the form of packaging boxes. This study was conducted with testing samples of 90 packaged products. Based on this research, the results were obtained, among others, in the injection molding production process resulting in minimal defect values at the setting of Injection Speed level 1 10%, Injection Pressure level 3 150 bar, Plastisification (Position) level 3 180 mm and Temperature level 3 2400C. Interpretation of the results of the confirmation experiment for mean values is acceptable in consideration of the confidence interval that the results of the confirmatory experiment are smaller than the optimal results. With this, it can be concluded that this research can be implemented to improve the quality of packaging products for the Injection Molding Process.
THE EFFECT OF PARAMETER AND MATERIAL SETTING VARIATIONS ON PRODUCT QUALITY ON INJECTION MOULDING MACHINES Muhammad Ikhwan; Diana Yuliastuti
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 23 No. 2 (2024): Berkala Penelitian Kulit, Sepatu, dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/kwn7xr53

Abstract

Injection Molding is one of the production processes that is widely used to produce various plastic products. As with other fabrication methods, plastic products produced through the Injection Molding process have the potential to have product defects (defects). This research was carried out to improve the quality of the products produced. The research was conducted in four experiments using HDPE Recycle, HDPE Original, PP and ABS plastic materials with different parameter settings. The parameter settings used include temperature, Injection Speed, Injection Pressure, Holding Speed, Holding Pressure, Rotation Speed, Back Pressure, Plastification Speed, Plastification Pressure, Plastification Potition. In the first experiment using HDPE Recycle material, data was obtained in the form of product defects in Short Shot, Flow Mark, Sink Mark, Warpage. In the second experiment, using Original HDPE material which has better quality than HDPE Recycle because its purity is still maintained, data in the form of defects in Warpage products was obtained. In the third experiment using PP material, Flow Mark and Warpage defects were found in the resulting product. In the fourth experiment using ABS material, defects in Short Shot and Flow Mark were found. From this study, it is known that each material has different properties and qualities so that the setting of injection machine parameters must be adjusted to the material used. From the parameters used in each of these experiments, product defects that arise are also known so that the right solution can be found to overcome the product defect.
Co-Authors Diana Yuliastuti