PERAWATAN PREVENTIVE DAN CORRECTIVE UNTUK MENGATASI KEBOCORAN PADA MIXER MESIN DRY LAMINASI BOBST DI PT MULIAPACK INTISEMPURNA

ABSTRACT

Leakage problems that occur in the Bobst Dry Lamination Mixer, because of this occurrence can cause the chemicals that have been mixed to harden so that the nozzle does not release the liquid into the cylinder tub evenly. The purpose of the research is to identify the causes of mixer leakage in the bobst dry lamination machine, and observe preventive maintenance on dry lamination machines at PT Muliapack Intisempurna and to find out corrective maintenance steps so that there is no mixer leakage in the bobst dry lamination machine. Based on observations obtained during industrial practice, a mixer leak was found due to a torn hose, this leak was based on the accumulation of NCO liquid that hardened in the hose until it spread to the diaphragm pump. The diaphragm pump that has found a buildup of scale from the NCO liquid ends up tearing the membrane due to the displacement space in the pump being clogged with lumps of a mixture of hardened NCO and OH. in order to facilitate the smooth running of the production process, carry out regular and routine monitoring actions on the mixer on the bobst dry lamination machine. Therefore, checking and cleaning the mixer must be carried out according to the existing maintenance schedule according to the mixer. This can help in detecting and predicting as early as possible leaks and damage to the mixer.
Keywords: Preventive Maintenance, Corrective Maintenance, Mixer, Dry Lamination Machine BOBST, NCO, OH, Mixer Leakage, Diaphragm Pump

ABSTRAK
Permasalahan kebocoran yang terjadi pada Mixer Dry Laminasi Bobst, karena terjadinya hal tersebut dapat menyebabkan bahan kimia yang sudah tercampur mengeras sehingga nozzle tidak mengeluarkan cairan ke bak cylinder dengan rata. Tujuan penelitian untuk mengidentifikasi penyebab terjadinya kebocoran mixer di mesin dry laminasi bobst, dan mengamati perawatan preventive pada mesin dry laminasi di PT Muliapack Intisempurna serta untuk mengetahui langkah perawatan corrective agar tidak terjadi kebocoran mixer di mesin dry laminasi bobst. Berdasarkan observasi yang didapatkan selama praktik industri, didapati kebocoran mixer karena selang mengalami sobek, kebocoran ini didasari oleh penumpukan cairan NCO yang mengeras dalam selang hingga merembet ke pompa diafragma. Pompa diafragma yang sudah mendapati penumpukan kerak dari cairan NCO berakhir dengan membuat sobek pada membran akibat ruang perpindahan dipompa tersumbat gumpalan-gumpalan campuran antara NCO dan OH yang mengeras. Guna memperlancar berlangsungnya proses produksi, lakukanlah tindakan pemantauan secara berkala dan rutin terhadap mixer pada mesin dry laminasi bobst. Oleh karena itu pengecekan dan pembersihan pada mixer harus dilakukan sesuai jadwal perawatan yang ada sesuai mixer. Hal ini dapat membantu dalam mendeteksi dan memprediksi sedini mungkin kebocoran serta kerusakan pada mixer.

Kata Kunci: Preventive Maintenance, Corrective Maintenance, Mixer, Mesin Dry Laminasi BOBST, NCO, OH, Kebocoran Mixer, Pompa Diafragma