Aplikasi Disain Komposit Pusat Pada Proses Pengecatan Mobil Bekas

The business of buying and selling used cars is increasingly substantial in Indonesia, in the era of globalization progressively developing depends on demands a process that must be fast, precise, and economical. Repair to body, chassis, and engine are competency expertise in the field of Automotive Engineering that emphasizes automotive repair service skills. at now selling price of used cars, it is necessary to do repairs, the process of repairing used cars or better known as refurbishment work pre-owned cars is mostly done by small-scale used car buying and selling businesses. In order for used cars to return to their like-new condition, generally small-scale used car sellers carry out the process of repairing the vehicle themselves, especially repairs to the vehicle's body paint. This study aims to process of painting a Toyota Avanza car bodypaint against the thickness of the paint using a spray booth tool by using the model of central composite design (CCD). The effect of spray-on booth temperature, interstice size of the spray gun, and time according to the thickness of the paint will be analyzed using the CCD method. This spray booth painting technology is expected to help reduce bodypaint lead time. The results of the ANOVA (Analysis of Variance) regression analysis, the temperature of the spray booth, interstice size of the spray gun, and time are the factors that most significantly affect the thickness of the paint. The operating conditions to produce optimal paint thickness are temperature 55oC, interstice size of spray gun of 1.7 mm and time of painting and drying of 30 minutes, the resulted of a thickness of the paint for used and new cars are 130.2 μm and 81.84 μm., with a coefficient of determination for used and new cars of 90.78% and 96.19%.

WORKING CONDITIONS FOR EMPLOYEES OF THE ENTERPRISE OF WOODWORKING INDUSTRY

The hygienic assessment of working conditions at the modern furniture company showed such conditions at main work places are referred to the third class of the first and second degrees of the hazard and danger. The most adverse working conditions (3 class, 2 degree) are typical for operators of woodworking machines, machine operator in a spray booth for the edges of the sorter-stacker at the discharge conveyor line trim boards and spray the frames, the sorter-stacker at the feed conveyor panels of finish line rollers. Man-made noise, low lightness of working places, and the hardness of the labor process are most harmful occupational factors. Implementation of paint operations on processing of furniture components is further accompanied by the air pollution of the working area by chemicals and exposure of the body of the worker to the heating microclimate of radiation-convection type. Most of workplaces are characterized by summing the classes of working conditions on a number of factors. It indicates to their complex impact on the body of the worker. The assessment of the risk of occupational hearing loss showed the most probability of its development in machine operators and packers.

Economic aspects in the design process of heat recovery installations - case study

The paper presents a proposal of economic aspects application in the process of optimizing the construction of heat recovery unit. The proposed model includes the cost of heat exchanger installation and the predicted economic benefits during the operation of the device. The predicted benefits include an increase of energy efficiency resulting from the number of modules of heat recovery unit, decrease unit efficiency during operation, the cost of heat production, average temperatures in the geographical location and working time. A case study was carried out on the example of a spray booth.

Review and Evaluation of Different Paint Booths Depending on Their Air Flow

All companies aim to produce the best quality product and receive the highest profit. Also ensuring a healthy environment for employees is of high importance. Choosing the right type of spray booth will assure the latter in any company that is involved in painting. The article reviews and evaluates different airflow type spray booths. Using analysis of options the optimal decision is determined taking into account the price, simplicity of construction, paint finish quality, general spray booth size and energy consumption.

PERBAIKAN KUALITAS MENGGUNAKAN PRINSIP KAIZEN DAN 5 WHY ANALYSIS: STUDI KASUS PADA PAINTING SHOP KARAWANG PLANT 1, PT TOYOTA MOTOR MANUFACTURING INDONESIA

Kualitas merupakan salah satu faktor penting penentu keberhasilan suatu perusahaan dalam menguasai persaingan. Pada Painting Shop Karawang Plant 1 PT Toyota Motor Manufacturing Indonesia, kualitas diukur melalui OK Ratio, yaitu perbandingan antara jumlah unit yang sesuai standar dengan total unit yang diproduksi. Pada tahun 2017, OK Ratio Painting Shop belum mencapai target. Salah satu defect yang berkontribusi besar terhadap OK Ratio adalah dust seed yang terjadi pada area front door opening. Penelitian dilakukan dengan menggunakan Kaizen melalui siklus PDCA dengan menggunakan seven tools of quality dan 5 why analysis. Diketahui bahwa terdapat tiga akar penyebab defect dust seed: tidak terdapat downflow pada area moisture sanding, jig yang digunakan masih kotor akibat pencucian yang tidak efektif dan jig digunakan secara berulang tanpa dibersihkan. Dengan melakukan perbaikan sesuai dengan akar permasalahan yang telah ditemukan, didapatkan hasil reject dust seed pada area front door opening berkurang sebanyak 35.29% dan proses repair touch up 2K berkurang sebesar 53.6%. Ditetapkan standar untuk mendukung berjalannya perbaikan yang dilakukan, yaitu standar kerja proses airblow jig pada area jig handling untuk memastikan jig yang akan dipakai bebas kontaminan, standar kerja proses vacuum cleaning untuk memastikan unit bersih dari kontaminan sebelum memasuki spray booth, serta standar perawatan dust catcher.

Analysis of toxicity from the effluent generated in a furniture industry spray booth using the species Lactuca sativa and Allium cepa

This study evaluated the toxicity of effluent generated in a furniture industry spray booth, before and after treatment in a system composed of an anaerobic sequencing batch (ASBR) followed by an aerobic sequencing batch reactor (SBR). The toxicity tests were carried out with raw (with and without dilutions) and treated effluent to evaluate the toxic potential using Allium cepa and Lactuca sativa as bioindicators. The toxicity tests, using Allium cepa and Lactuca sativa, indicated that the anaerobic-aerobic treatment performed was efficient to reduce the toxicity of the paint booth effluent. The raw effluent, undiluted and diluted (at 1:10; 1:8 and 1:6 dilutions), showed toxic effect on the root growth of Allium cepa, as it inhibited root growth by 100%. In the tests with Lactuca sativa seeds, there was partial inhibition, between 44% and 63%, for 1:10 and 1:8 dilutions, but for the 1: 6 dilution and without dilution of effluent the inhibition was 100%. The treated effluent, in an ASBR followed by an SBR, presented a small percentage of inhibition for tests with Allium cepa (13%) and Lactuca sativa seeds (4%). The effluent treated by the anaerobic system followed by aerobic presented low toxicity without generating lethal or sub-lethal effects to the test organisms, which indicates the efficiency of the treatment process.