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All Journal Jurnal Rekayasa Mesin Abdimas UNWAHAS : Jurnal Pengabdian Masyarakat UNWAHAS
Tono Putri, Farika
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Economics, Econometrics & Finance Mechanical Engineering Medicine & Pharmacology Social Sciences

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Design and Performance Testing of a Keychain Product Mold for a Learning Module in the Metrology and Plastic Moulding Laboratory at XYZ Anggit Kristiawan, Timotius; Setiyawan, Trio; Tono Putri, Farika; Ayu Janitra, Atikah; Syukur Alfauzi, Abdul; Mujiarto, Iman; Ningtias, Dieta Wahyu Asry
Jurnal Rekayasa Mesin Vol. 20 No. 3 (2025): Volume 20, Nomor 3, Desember 2025
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v20i3.6563

Abstract

In the current technological era, plastic assumes a crucial role in daily life. This is substantiated by the continuously escalating demand for plastic-based products. Manufacturing items by reshaping plastic raw materials necessitates the use of plastic forming tools or machinery. A prevalently utilized apparatus is the injection molding machine, which employs a specialized mold. The mold design process mandates rigorous calculations and planning to ensure the production of dimensionally identical and uniform parts, thereby facilitating mass production. The primary objective of this research was to design, implement, and validate a mold for plastic injection molding, specifically intended for the mass production of keychains. The methodology employed was the Sighley's Mechanical Engineering Design approach, which encompasses the following sequential procedures: Problem Identification, Problem Definition, Synthesis, Analysis and Optimization, Evaluation, and Presentation. The fabricated keychain mold yielded two products per injection cycle, with mold dimensions (L×W×H) measuring 110 mm×100 mm×160 mm. The mold was mounted on the injection molding machine, requiring a clamping force of 46710 N, with system control provided by an Arduino and cooling facilitated by an external fan. The test results identified the optimal operating parameters for a single molding process, comprising a heating temperature of 210°C, an injection time of 17 seconds, and a cooling time of 12 seconds.
PENERAPAN DAUR ULANG (RECYCLE) PASIR SILIKA DALAM PROSES PEMBUATAN CETAKAN PASIR UNTUK MENEKAN BIAYA PRODUKSI DI CV. RAM TEGAL Yanuar, Padang; Khoryanton, Ampala; wirawan, yuris; Tristijanto, Hery; Anggit Kristiawan, Timotius; Tono Putri, Farika; Syukur Alfauzi, Abdul; Harmanto, Sri; Isti Nugroho, Wahyu; Abidin, Zaenal; Fitrianti Sugiono, Friska Ayu; Rizky Riadini, Elfrida; Mujiarto, Iman; Mamba'udin, Ahmad; Satya, Evan Bagas; Prasetyo, Anoeng; Mahendra, Tegar Aprilio
ABDIMAS UNWAHAS Vol. 11 No. 1 (2026): Abdimas Unwahas
Publisher : Universitas Wahid Hasyim Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/abd.v11i1.15346

Abstract

Objek yang menjadi mitra kegiatan pengabdian adalah CV. Rejeki Abadi Machinery (CV RAM) yang bergerak di bidang pengecoran logam. Dalam proses produksinya, perusahaan menggunakan pasir silika sebagai bahan utama dalam pembuatan cetakan untuk komponen pompa. Permasalahan yang dihadapi mitra adalah belum dimanfaatkannya limbah dari proses pengecoran di CV.RAM khususnya pasir silica, sehingga biaya produksi menjadi tinggi. Solusi yang diberikan adalah pasir silica setelah digunakan direcycle sehingga dapat menekan biaya produksi. Metode yang akan dipakai untuk pelaksanaan rencana tersebut yaitu: tahapan perencanaan, pelaksanaan program dan pendampingan sampai evaluasi kegiatan mitra. Hasil pengabdian yang dilakukan dengan teknologi tepat guna berupa mesin pengayak pasir yaitu kebutuhan pasir silika baru mencapai 25 ton per bulan, berkurang menjadi 16 ton per bulan setelah alat diterapkan. Hal ini menunjukkan efisiensi penggunaan pasir silika daur ulang sebesar 9 ton per bulan. Meskipun harga pasir silika tetap Rp. 800.000,- per ton, total biaya pembelian menurun dari Rp. 20.000.000,- menjadi Rp. 12.800.000,- per bulan, sehingga penghematan biaya perbulan dapat dicapai sebesar Rp. 7.200.000,- atau 36% dari total biaya sebelumnya.
Co-Authors Anggit Kristiawan, Timotius Ayu Janitra, Atikah Fitrianti Sugiono, Friska Ayu Hery Tristijanto Isti Nugroho, Wahyu Khoryanton, Ampala Mahendra, Tegar Aprilio Mamba'udin, Ahmad Ningtias, Dieta Wahyu Asry Padang Yanuar Prasetyo, Anoeng Rizky Riadini, Elfrida Satya, Evan Bagas Setiyawan, Trio Sri Harmanto Syukur Alfauzi, Abdul wirawan, yuris Zaenal Abidin