CFD Optimization Method to Design Foam Residue Traps for Full Mold Casting

Full mold casting is a casting process in which a mold made of wood or metal is substituted for a styrofoam model. This metal casting process is advantageous for the production of large-sized castings because it uses a foamed model. However, this unique process of melting a foamed model causes a problem which is the foamed model remains dissolved in the casting. This is called foam residue defect and is specific to full mold casting. In this study, we propose a new casting design called a residue trap to reduce these residue defects. This residue trap collects the residue of foam models included in the molten metal, which tends to be generated when the temperature of the molten metal becomes low by being attached to the product part in the same way to overflows. We also optimized the shape of the residue trap in terms of easing of post-treatment and increasing efficiency of collecting foam residue. Eventually, the effectiveness of the residue trap was verified by actual full mold casting experiments.

Diagnostic studies for common invasive and infectious pathologies of rabbits in the Orenburg region

Rabbits, like other animal species, are susceptible to infection with invasive and infectious diseases. Both ecto- and endoparasites are registered in them, including helminths, insects on the body, acarus scabies, protozoa. Rabbits are characterized by a high degree of precocity, high fecundity and the breadth of use of the products obtained from them. As a product of rabbit breeding, first, meat is in demand as a dietary product. Part of the products from rabbits - hair, wool-molt is obtained during the life of the animal, and meat, skins, other products - after slaughter. Skins and rabbit hair are used for the manufacture of fur products, as well as in the felt and knitting industry. In addition, biologists, doctors, veterinarians use rabbits as laboratory animals in scientific research, for testing cosmetics, as well as in laboratories and bio factories for drug testing. To preserve the population of these species, it is important to prevent infection with various pathologies inherent in rabbits, including invasive diseases.

Perancangan Perbaikan Proses Produksi Komponen Bodi Mobil Daihatsu dengan Lean Manufacturing di PT. “XYZ”

Astra Daihatsu Motor Company. Potential market for automotive is continuously growing which is positive signal for automotive businesses. However nowadays competition is also getting stronger. Therefore PT Inti Pantja Press Industri should efficiently manage their production. One way is by reducing and eliminating waste in its production. Production process in PT. Inti Pantja Press Industri is still having several problems. Based on early observation there are bottleneck in subassy processes and also defective product. Reffering to these problems, it can be indicated that there are several waste in production process of PT. Inti Pantja Press Industri.Therefore, Lean Manufacturing approach is utilized to reduce or eliminate waste in production processes. First, various waste are identified using Value Stream Mapping. Borda Count Method is used for determining critical waste that occur, they are as follow: waste waiting, defect, and overproduction that cause over inventory finish product. Then, 5 Whys Analysis specifies root causes of waste waiting and waste defect. By using Failure Mode and Effect Analysis, highest priority of root causescan be selected, which are operator do not clean dies before press process, operator do not replace components that has already over its lifetime (wear) and rust on finish product part. Recommendations for improvements are conducted by implementating Poka Yoke method, they are: installation of sensors and equipment in Press machines and wrapping finish part product.