ANALYSIS OF LINE EFFICIENCY IN FINISHING DEPARTMENT PT PURA NUSAPERSADA UNIT PAPER MILL 7/8

Measuring line efficiency and productivity are very important to do to find out in which level the efficiency and productivity of the business process has been carried out by the company. This paper aims to determine line efficiency analysis and provide suggestions for improvements to increase line efficiency at the finishing department of PT Pura Nusapersada. Measurement of line efficiency in the finishing department of PT Pura Nusapersada paper mill unit 7 has not yet reached the company's line efficiency value target. The initial line efficiency assessment obtained a percentage of 65.14% while the company's target was 70%. In this paper, a fishbone diagram is used to determine the root cause of the problem. Based on the research results, it was found that the most dominant cause of the problem was the inefficient work elements at the cutter, sorting, pollar, and packing work stations. Improvements were made using the eliminate, combine, re-arrange, and simplify (ECRS) method and the results of the line efficiency improvements in the finishing department increased to 71.90% and the company's target can be met.

RESEARCH OF THE PROCESS OF MECHANOACTIVATION OF WHEAT BRAN ON THE CHOPIN CD1 MILL UNIT

The use of wheat bran, subjected to mechanical activation, as an auxiliary component for the enrichment and expansion of the range of cookies in order to save resources is relevant.

Analisis Penyebab Kerusakan Hot Rooler Table dengan Menggunakan Metode Failure Mode And Effect Analysis (FMEA)

This research was conducted in an international company engaged in iron and steel products manufacturing industries. One of the equipment that is often damaged is a hot roller table machine in the furnace section mill unit. The availability results obtained in hot roller table equipment is 96.571% and is still below the company standard which is set at 98%. Therefore, we need an analysis of the root causes of the problem and search for the best solution to fix the existing problem by applying the method of Failure Mode and Effect Analysis (FMEA). FMEA is a method that can systematically and structurally analyze and identify the consequences of a system or process failure, and also reduce or analyze the probability of failure. The purpose of this study is to identify and analyze the level of damage and its causes with the application of the FMEA method. Based on the pareto diagram the damage to the hot roller table machine, it was found that the highest frequency of damage was in the rotary coupling with a down time percentage of 26.9%. From the FMEA Analysis, two components that have very high RPN values are categorized as potential severit i.e. bearing as the first with an RPN value of 392 and the second is a seal ring with an RPN value of 294. The two components are the main priority for repair of the furnace section. mill, especially for machine and human aspects.

Determining Interval Time of Maintenance in Bosowa Cement Indonesia using Reliability Method

Maintenance for machining and production facility is an important aspect to ensure a smooth production process. During this time, it was performed regular maintenance based on technical advice from supplier’s engines which just shows things in general without considering the actual operating conditions. This paper aims to plan the maintenance strategies for the Finish Mill unit based on reliability analysis by considering the target system reliability and cost of improving reliability. The data distribution obtained the most appropriate distribution. Based on the data obtained distribution parameters, then the function of the reliability of each part an be determined so that the value of the reliability of each part and the overall system for a specific time period can be calculated. The results showed that the failure or breakdown Mill Finish Unit was majority caused by the part of 561.BM1, 531.WF1, 531.BC6, 531.BC2, 531.BC1, 561.SR1 and 531.BC3. it means that need to focus o the reliability analysis to allocate their parts.

A Compliant Instrument for Arthroscopic Joint Fusion

Due to its complex shape and its tightness, it is difficult to prepare the subtalar joint for fusion by means of a minimally invasive approach and conventional straight instruments. The preparation implies the establishment of bleeding contact surfaces. It is desirable to preserve the joint’s shape to keep congruent and smooth contact surfaces for optimal fusion. A compliant instrument was designed to facilitate the preparation by starting the design process from a clinically driven approach. The concept consists of a drill/mill unit at the tip that is steered through the joint by means of a passive automatic control. Since the joint will be fused, the cartilage and the subchondral bone layers should intentionally be damaged. This allows the use of the subtalar joint surfaces themselves as a guiding tunnel to preserve the joint’s shape. Thereto, a guidance frame was placed at the tip. The instrument is equipped with a special shaft that is compliant in one direction (perpendicular to the joint surfaces), and stiff in the two other directions to resist and transmit machining forces. The dimensioning of the instrument was performed by taking into account the specific shape of the subtalar joint. A prototype of the instrument was manufactured. The prototype is powered by a commonly used shaver system. The compliant instrument was tested in cadaver material, and gives promising results. In practice, the difference of the stiffness in y- and z-direction is at least a factor 100.