RANCANG BANGUN SISTEM STRUKTUR PENGANGKAT CETAKAN PADA MESIN INJECTION MOLDING TYPE BOY 50T2

RIKY RHOMANDHONI, . (2026) RANCANG BANGUN SISTEM STRUKTUR PENGANGKAT CETAKAN PADA MESIN INJECTION MOLDING TYPE BOY 50T2. Sarjana thesis, UNIVERSITAS NEGERI JAKARTA.

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Abstract

Penelitian ini bertujuan untuk merancang dan membangun sistem struktur pengangkat cetakan pada mesin Injection Molding tipe BOY 50T2 yang berada di Laboratorium Teknik Mesin Universitas Negeri Jakarta. Permasalahan yang dihadapi adalah belum tersedianya alat bantu pengangkat cetakan (mold) dengan berat sekitar 125 kg sehingga proses bongkar pasang cetakan sulit dilakukan dan berpotensi menimbulkan risiko kecelakaan kerja bagi operator. Solusi yang dikembangkan berupa alat bantu pengangkat jenis portable gantry crane yang dirancang sesuai dengan dimensi dan kebutuhan mesin Injection Molding. Metode penelitian yang digunakan meliputi identifikasi kebutuhan, perancangan menggunakan perangkat lunak SolidWorks, perhitungan analisis struktur secara manual, simulasi stress analysis, serta pembuatan dan pengujian alat. Material utama yang digunakan adalah baja H Beam ASTM A36 dan roda berbahan Polyurethane (PU). Analisis dilakukan untuk mengetahui nilai tegangan lentur, tegangan geser, defleksi, safety factor, dan kapasitas beban maksimum yang dapat ditahan oleh struktur. Hasil penelitian menunjukkan bahwa alat pengangkat yang dirancang memiliki dimensi panjang 2150 mm, lebar 1500 mm, dan tinggi 2100 mm. Hasil perhitungan manual menghasilkan tegangan lentur sebesar 8,7 MPa, tegangan geser 1,1 MPa, tegangan geser las 0,86 MPa, dan defleksi 0,32 mm, yang seluruhnya berada di bawah batas izin material. Sementara itu, hasil simulasi menggunakan SolidWorks menunjukkan nilai Von Mises Stress maksimum sebesar 22,9 MPa, displacement maksimum 1,24 mm, dan safety factor minimum sebesar 11. Berdasarkan nilai safety factor tersebut, struktur secara teoritis mampu menahan beban maksimum hingga 1375 kg, jauh di atas beban kerja aktual sebesar 125 kg. Dengan demikian, sistem struktur pengangkat cetakan yang dirancang dinyatakan aman, layak digunakan, dan mampu meningkatkan keselamatan serta kemudahan kerja operator dalam proses bongkar pasang cetakan pada mesin Injection Molding tipe BOY 50T2. Kata Kunci : Injection Molding, Portable Gantry Crane, Cetakan (Mold), Analisis Tegangan, Solidworks, Struktur Pengangkat ***** This research aims to design and build a mold lifting structure system on a BOY 50T2 type Injection Molding machine located in the Mechanical Engineering Laboratory of Jakarta State University. The problem faced is the unavailability of a mold lifting aid (mold) weighing around 125 kg so that the mold assembly and disassembly process is difficult and has the potential to cause work accidents for operators. The solution developed is a portable gantry crane lifting aid designed according to the dimensions and needs of the Injection Molding machine. The research methods used include needs identification, design using SolidWorks software, manual structural analysis calculations, stress analysis simulations, and tool manufacturing and testing. The main materials used are ASTM A36 H Beam steel and Polyurethane (PU) wheels. Analysis was carried out to determine the value of bending stress, shear stress, deflection, safety factor, and maximum load capacity that can be supported by the structure. The results show that the designed lifting tool has dimensions of 2150 mm in length, 1500 mm in width, and 2100 mm in height. The manual calculation results produced a bending stress of 8.7 MPa, a shear stress of 1.1 MPa, a weld shear stress of 0.86 MPa, and a deflection of 0.32 mm, all of which are below the material's allowable limit. Meanwhile, the simulation results using SolidWorks showed a maximum Von Mises Stress value of 22.9 MPa, a maximum displacement of 1.24 mm, and a minimum safety factor of 11. Based on these safety factor values, the structure is theoretically capable of withstanding a maximum load of up to 1375 kg, far above the actual working load of 125 kg. Thus, the designed mold lifting structure system is declared safe, suitable for use, and able to improve the safety and ease of work of operators in the process of dismantling and assembling molds on the BOY 50T2 type Injection Molding machine. Keywords : Injection Molding, Portable Gantry Crane, Mold, Stress Analysis, Solidworks, Lifting Structure

Item Type:	Thesis (Sarjana)
Additional Information:	1). Dr. Eng. Agung Premono, S.T., M.T. ; 2). Ahmad Lubi, M.T.
Subjects:	Teknologi dan Ilmu Terapan > Teknik Mesin, Mekanika Teknik
Divisions:	FT > S1 Pendidikan Teknik Mesin
Depositing User:	Riky Rhomandhoni .
Date Deposited:	11 Aug 2026 04:33
Last Modified:	11 Aug 2026 04:33
URI:	http://repository.unj.ac.id/id/eprint/69624

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