Preventive Maintenances of Waste Crushing Equipment at Subang State Polytechnic

The research in this final project aims to determine the preventive maintenance schedule for the plastic waste smelter and to determine the application of preventive maintenance to the plastic waste smelter. The maintenance process for this tool uses preventive maintenance with inspection, small repair, medium repair and overhaul (ISMO) methods. The implementation method of waste smelter into plastic involves data collection through direct observations of the smelter area, component identification, maintenance schedule planning, expert validation


INTRODUCTION
Plastic is a very practical object for any purpose and is used in everyday life, without having to spend a lot of money we can also use it.However, its practicality makes people use it less.People only use it once and throw it away carelessly.In general, plastic waste is very difficult to decompose because waste disposal is not managed properly and is not reprocessed [1] [2].
Furthermore [3][4] plastic waste management can be addressed by converting waste into other forms that can be utilized.
[5] [6].Added that the best solution for managing plastic waste is to use a waste shredding machine.The design of the waste shredder needs to be done to get optimal results.A plastic waste shredder can be a very effective solution in reducing the volume of plastic waste that is thrown away.By using a shredder, plastic waste can be converted into a form that is easier to manage, such as small flakes or raw materials that can be reused.This crushing process not only makes it easier to transport and store waste, but also opens up opportunities to recycle plastic into new products.With this technology, society can be more actively involved in managing plastic waste efficiently and contribute to environmental protection eforus.
The importance of designing efficient and environmentally friendly plastic waste shredder is also a crucial aspect in the successful use of this technology.Well-designed tools can ensure that the crushing process takes place optimally without producing additional negative impacts on the environment.Apart from that, careful design can also consider safety aspects so that the operator can use this machine safely [7] [8].
With an effective plastic waste shredder, it is hoped that it can encourage wider recycling practices and reduce the burden of plastic waste on the ecosystem.
Waste chopping equipment that is used routinely must receive regular maintenance to prevent damage to the tool [9] [10].added by [11] maintaining the machine makes the machine more optimal.One of the machine maintenance is preventive maintenance [12].This method includes planned maintenance which is a form of scheduled maintenance implementation [13], [14].show that previously there was a plastic waste recycling tool called a "plastic waste smelter", there are still several things that need to be done, namely making a maintenance schedule and carrying out work steps using preventative maintenance.by using inspection, minor repair, medium repair and overhaul methods at plastic waste smelters with the aim of extending service life, streamlining the production process and minimizing major damage and minimizing maintenance costs [16][17] also added that regular machine maintenance needs to be carried out every week, month and year.The ISMO method is the most suitable method to be applied in this case.

RESEARCH METHOD
In carrying out the maintenance of the plastic waste smelter with this drive system, various steps of the activity process are required, some of which can be seen in the following steps.

CONCLUSION
In the process of working on this final project several conclusions can be drawn 1.The preventive maintenance schedule for the plastic waste smelter includes monthly and annual maintenance using inspection and small repair methods.For monthly maintenance it is carried out every month while for annual maintenance it is the calculation result of monthly maintenance.
The results of the total time on the maintenance schedule are 1,692 minutes of inspection and 210 minutes of small repairs.
There are 3 main parts to the plastic waste smelter, namely the frame manufacturing system, the drive system and the electrical system.
2. Implementation of the maintenance schedule for the plastic waste smelter includes 3 main parts, namely the frame manufacturing system, drive system and electrical system.The frame manufacturing system includes checking welding joints, frame surfaces, outside of the fusing tube, inside of the fusing tube using a wire brush, sandpaper, rags to ensure that the plastic waste smelter remains in good condition.The drive system includes checking the electric motor, checking the condition of the reducer, pillow block, screw, the tool needed is a tachometer.Forward, 12,14 spanners.Then the electricity will include checking the temperature of the band heater, this process is carried out to determine the temperature conditions that work on these components.
The temperature detected on the servocontrol is 150° Celsius, which is the normal working temperature.Then check the repairs, plus dismantling all parts that may be worn out and must be replaced or repaired; (b) paint the surface of the damaged machine;(c) calibrate by leveling the machine.Overhaul has general work limitations, as follows: (a) repeat all maintenance actions carried out on medium repairs, but with disassembly involving each unit, all damaged and worn components are replaced with new components.;(b) machine foundation inspection (foundation depth installation) and repairs if necessary; (c) grind/grease all guide surfaces; (d) painting all surfaces that must be painted with new paint [15].The results of observations in the field at the Department of the Environment (DLH)

Figure 2 .Table 1
Figure 2. Research observations 2. Component Identification Component identification is carried out to group or determine which component parts will be treated in a plastic waste smelter.Treatment is carried out with preventive maintenance with the ISMO method [20][21].