Pengaruh Suhu, Injection Time dan Backpressure Terhadap Cacat Penyusutan Pada Produk Flange

  • YudhI Chandra Dwiaji Universitas Mercubuana
  • Iwan Muklas Universitas Mercu Buana
  • Abdul Halim Politeknik Negeri Samarinda
I will put the dimension here
Keywords: haspel, shrinkage, injection molding, backpressure


Haspel or often called cable reel is the item or tool needed to roll the cable. Usually this cable reel is made of wood. However, over time this haspel has changed, especially in the material used, which is made of plastic or polypropyelene (PP) material. This haspel consists of several components including: Flange and barrel reinforced using steel rods. All these components will be assembled and ready for sale. When assembled, the flange components must require a fairly good precision because the material used is plastic, the shrinkage factor plays a very important role when printed with an injection molding machine. At the time of assembling the plastic haspel, there was a failure when the raft product was too tight and there was also a loose raft, this was due to shrinkage in the flange which caused the barrel component to not fit into the router part of the flange. This makes the assembly work a little longer than usual. In this final project, the author takes steps on how to analyze shrinkage defects in plastic materials, especially for polypropylene materials, starting from the injection molding process and then taking product samples with different levels of testing through parameter settings. Different injection times and backpressures will result in different product sizes and shrinkage values. A good melting temperature value is used for polypropylene material with a flange thickness of 6 mm, and a flange diameter of 850 mm ranging from 210°C - 230°C. Shrinkage defects in polypropylene materials certainly exist, and may be greater than polystyrene materials but can be minimized by setting good process parameters. A good and ideal shrinkage value and according to standards occurs at a temperature setting of 220°C backpressure 0.2 Mpa with an injection time of 20 seconds. With constant parameters, starting from the injection speed of 60 mm/s. Injection pressure 18 Mpa and cooling time 250 seconds.


[1] A. A. Gazal and S. H. Gheewala, “Plastics, microplastics and other polymer materials-A threat to the environment,” J. Sustain. Energy Environ. J. Sustain. Energy Environ., vol. 11, pp. 113–122, 2020, [Online]. Available:, microplastics and pp. 113-122.pdf
[2] R. S. Nasution, “Berbagai Cara Penanggulangan Limbah Plastik,” Elkawnie J. Islam. Sci. Technol., vol. 1, no. 1, pp. 97–104, 2015, [Online]. Available:
[3] I. Yulianto, Rispianda, and H. Prassetiyo, “Rancangan Desain Mold Produk Knob Regulator Kompor Gas pada Proses Injection Molding,” Reka Integr., vol. 2, no. 3, pp. 140–151, 2014.
[4] C. Nitnara and K. Tragangoon, “Simulation-Based Optimization of Injection Molding Process Parameters for Minimizing Warpage by ANN and GA,” Int. J. Technol., vol. 14, no. 2, pp. 422–433, 2023, doi: 10.14716/ijtech.v14i2.5573.
[5] M. Puji Ibnu Mimbar Maulana, C. Budiyantoro, and H. Sosiati, “Optimalisasi Parameter Proses Injeksi Pada Abs Recycle Material Untuk Memperoleh Shrinkage Longitudinal Dan Tranversal Minimum,” J. Mater. dan Proses Manufaktur, vol. 1, no. 1, pp. 1–10, 2017, [Online]. Available:
[6] M. Y. Nurfani and I. S. Mulyana, “Thermal Analisis Injection Molding Pada Cover Air Flow Terhadap Short Mold Defect,” J. Ilm. Teknol. dan Rekayasa, vol. 26, no. 2, pp. 103–110, 2021, doi: 10.35760/tr.2021.v26i2.4563.
[7] M. Y. Nurfani, “Analisa Delta E pada Material ASA Injection,” J. Ilm. Tek. Mesin, Elektro dan Komput., vol. 1, no. 3, pp. 1–8, 2021.
[8] Siti Qomariah and Agus Dani, “Pengaruh Inject Pressure Dan Clamping Force Terhadap Cacat Flashing Pada Proses Injection Molding Cover Pot,” J. Energi dan Teknol. Manufaktur, vol. 6, no. 01, pp. 21–28, 2023, doi: 10.33795/jetm.v6i01.2855.
[9] A. I. Ramadhan, E. Diniardi, and M. Daroji, “Analisa Penyusutan Produk Plastik di Proses Injection Molding Menggunakan Media Pendingin Cooling Tower dan Udara dengan Material Polypropylene,” Jrst J. Ris. Sains Dan Teknol., vol. 1, no. 2, p. 65, 2017, doi: 10.30595/jrst.v1i2.1577.
[10] A. Irwanto, D. Arifin, and M. M. Arifin, “Peningkatan Kualitas Produk Gearbox Dengan Pendekatan Dmaic Six Sigma Pada Pt. X, Y, Z,” J. Kalibr. - Karya Lintas Ilmu Bid. Rekayasa Arsitektur, Sipil, Ind., vol. 3, no. 1, pp. 1–17, 2020, [Online]. Available:
How to Cite
Chandra Dwiaji, Y., Muklas, I., & Halim, A. (2024). Pengaruh Suhu, Injection Time dan Backpressure Terhadap Cacat Penyusutan Pada Produk Flange . Journal of Applied Mechanical Engineering and Renewable Energy, 4(1), 1-5.