Optimalisai Mesin Injection Molding Tipe Screw Dengan Produk Klem Pipa Setengah Inci Untuk Mendapatkan Parameter Produksi

Dieta Wahyu Asry Ningtias; Trio Setiyawan; Timotius Anggit kritiawan; Fariz Wisda Nugraha; Mulyono; Muhammad Karel Islam

doi:10.32497/jmeat.v4i2.7696

Authors

Dieta Wahyu Asry Ningtias Politeknik Negeri Semarang
Trio Setiyawan Politeknik Negeri Semarang
Timotius Anggit kritiawan Politeknik Negeri Semarang
Fariz Wisda Nugraha Politeknik Negeri Semarang
Mulyono
Muhammad Karel Islam Politeknik Negeri Semarang

DOI:

https://doi.org/10.32497/jmeat.v4i2.7696

Keywords:

injection molding, injection tempetarature, optimalization, polypropylene, productivity efficiency

Abstract

Injection molding is one of the methods used in plastic forming processes. This study aims to optimize the screw-type injection molding machine owned by the Mechanical Engineering Laboratory of xyz, which was previously developed by xyz students. However, the machine had several deficiencies, such as barrel leakage, imperfect feeding in the hopper, unstable heating, and only one mold variation, namely a keychain mold. These issues reduced production efficiency.To overcome these problems, the machine was optimized by replacing and redesigning components such as the screw, barrel, nozzle, transmission system, and by adding a new mold variation for a half-inch pipe clamp. The method involved redesigning and testing based on operational parameters, including feeding temperature, injection temperature, injection time, and cooling time.Testing was conducted by setting the feeding temperature to 220°C, injection temperature between 290°C and 310°C, injection time between 11 and 13 seconds, and cooling time of 15 seconds. The material used was polypropylene (PP). The results showed that the optimal parameters were a feeding temperature of 220°C, injection temperature of 310°C, injection time of 12 seconds, and cooling time of 15 seconds. The resulting product exhibited good quality, with complete filling, no flash, and smooth surface finish. This indicates that the optimized screw-type injection molding machine successfully resolved the previous issues.

References

Pipit Muliyah, Dyah Aminatun, Sukma Septian Nasution, Tommy Hastomo, Setiana Sri Wahyuni Sitepu, T. (2020). Perancangan Alat Pembersih Barrel Mesin Injeksi. Journal GEEJ, 7(2).

Anggun Angkasa Bela Persada, Adhiela Noer Syaif, Zulkifli, 2019. (2021). Perancangan rangkaian sistem pemanas pada plastic injection molding 1,2). 8(2), 157–162.

Campanale, C., Savino, I., Pojar, I., Massarelli, C., & Uricchio, V. F. (2020). A practical overview of methodologies for sampling and analysis of microplastics in riverine environments. Sustainability (Switzerland), 12(17). https://doi.org/10.3390/SU12176755

Habib Maulana Ibrahim, Muhamad Zain Fuadi, Muhammad Khoirurrizqi, Ramadhan Satria Atama (2024). Rancang Bangun Mesin Injeksi Molding Tipe Screw Guna Memproduksi Aksessoris Dengan Volume Maksimal 20 cm3. Laporan Tugas Akhir D3, Program Studi D3 - Teknik Mesin Politeknik Negeri Semarang, Semarang

Vlachopoulos, J., & Strutt, D. (2002). Asic Heat Transfer and Some Applications in Polymer Processing. Plastics Technician’s Toolbox, 2, 21–33.

Typical Engineering Properties of Polypropylene,(2014), https://www.ineos.com/globalassets/ineos-group/businesses/ineos-olefins 67 and-polymers-usa/products/technical-information--patents/ineos engineering-properties-of-pp.pdf?utm_.NEOS , olefins and polymers USA (diakses pada tanggal 6 Agustus 2025)

TechnicalnDatamSheetmPolypropylene.(2021).https://polymers.totalenergies.com/sites/g/files/wompnd5016/files/site_collec tion_documents/Technical%20Datasheets/3727WZ-US.pdf?.Total Energies Petrochemical and Refining USA,Inc.Polymers America. (diakses pada tanggal 6 Agustus 2025)

LyondellBasell. (2015). A Guide to Polyolefin Injection Molding A Guide to Polyolefin Injection Molding. 1–47. www.LYB.com

Menges, G., Michaeli, W., & Mohren, P. (2001). How To Make Injection Molds Third Edition.

Osarenmwinda, J., & Olodu, D. (2015). Barrel Temperature Effects on the Mechanical Properties of Injection Moulded Plastic Products. Nigerian Journal of Technology, 34(2), 292. https://doi.org/10.4314/njt.v34i2.12

Cross, N. (2000). Strategies for Product Design. In Design. http://www.lavoisier.fr/notice/fr421790.html

Chen, M. (2022). Important knowledge of injection molding machine barrel. https://guanxin- machinery.com/important-knowledge-of-injection-molding machine-barrel/

Dominick V.Rosato, P. . (2000). Injection Molding Handbook Third Edition. 3.

U, Wahyudi. (2015). Pengaruh Injection Time dan Backpressure Terhadap Cacat Penyusutan pada Produk Kemasan Toples Dengan Injection Molding Menggunakan Material Polistyrene. 2, 0–9.

Sularso, & Kiyokatsu, S. (2008). Dasar dan Perencanaan dan pemilihan Elemen Mesin. In Paper Knowledge . Toward a Media History of Documents.