SIFAT MEKANIK DAN CACAT PENYUSUTAN (SHRINKAGE) AKIBAT VARIASI KOMPOSISI CAMPURAN DAUR ULANG POLYETHYLENE PADA INJECTION MOULDING

  • Muhammad Ghilman Badri Alumni Mahasiswa Jurusan Teknik Mesin Fakultas Teknik Universitas Jember
  • Mahros Darsin Staf Pengajar Jurusan Teknik Mesin Fakultas Teknik Universitas Jember
  • Dedi Dwilaksana Staf Pengajar Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Abstract

Injection moulding is one process to form plastic by compress the melted plastic in a closed die. The raw material for the process either pure plastic pellet or mixed with recycled plastics. this research focused on finding the acceptable percentage of recycled  the raw material in term of tensile strengh and shrinkage. The composition is varied from 0% to 100% of polyethylene. Tensile test shows that the more percentage of recycled the lower is the  tensile strenght. on the other hand, the more the recycled composition the highernis shrinkage number. Both decrease of tensile strengh and increase of shrinkage are linearly. Recycled plastic in the raw material makes the composition be not uniform. It leads misrun defect, i.e. the melted plastic solidified before it reach the destined cavity in the mold. Moreover, it also creates more void in the parts. The highest tensile strength of 19.10 N/mm2 when no recycled mixed in, whereas the minimum of 12.05 N/mm2 achieved when 100% recycled was applied. Recycled Composition of 100% also increased by 9,82% compare to pure plastic.

Keywords: Recycled plastic, tensile strength, shrinkage.

Published
2014-04-01
How to Cite
BADRI, Muhammad Ghilman; DARSIN, Mahros; DWILAKSANA, Dedi. SIFAT MEKANIK DAN CACAT PENYUSUTAN (SHRINKAGE) AKIBAT VARIASI KOMPOSISI CAMPURAN DAUR ULANG POLYETHYLENE PADA INJECTION MOULDING. ROTOR, [S.l.], v. 7, n. 1, p. 14-18, apr. 2014. ISSN 2460-0385. Available at: <https://jurnal.unej.ac.id/index.php/RTR/article/view/1598>. Date accessed: 07 mar. 2021.
Section
Articles