Molds manufacturing to produce chloroprene rubber product with carbon steel over time the mold surface will wear. From the original. The practice in the industry often uses surface coatings (Hard chrome method) or change materials to create molds. Therefore this research is to study the effect of corrosion or wear. To see the size of surface mold changed in the experiment. Based on a tolerance of 0.1 millimeters at the molding point and after molding in the actual work conditions of a 2-3 weeks sample and mold size measurement. At less than 10 times the permissible coordinate value is 0.01 millimeters. The experiment found that. The wear of carbon steel molds was formed with chloroprene rubber. It has a very small value when referenced to the tolerance coordinates which is not significantly reduced when the rubber specimen size is determined. The allowance range is 10 μm to 100 μm. Therefore the design of chloroprene rubber to make molds with carbon steel. It can help reduce production costs. Without replacing with corrosion-resistant materials or adding coatings.

The objective of this research was to determine and estimate the quality of ground water for producing village-tap water without pre-treatment in 3 districts Samchuk Nongyasai and Dermbangnangbuat districts Suphanburi province. Villagetap water was collected from 88 boreholes covered 17 sub-districts in June 2014 and January 2015 using standard method and then correctly preserved before analysis process. The result showed that pH conducted in filed using pH meter found in the range 7.0 to 9.2. Total hardness was found in the range of 110 to 590 mg/L as CaCO3. The concentration of Mn Fe Pb was found in the range of 0.08 - 0.88 mg/L nd - 1.88 mg/L and nd - 0.07 mg/L respectively. The concentration of Cd was to be non-detectable for all samples. The result found that total hardness was found higher value than standard quality water according to publish by Ministry of Natural Resources and Environment Thailand. The contamination of Mn and Fe in some samples was higher value than maximum allowable concentration. The problem of Fecontamination can extremely affect to physical properties of quality water. The production of household-water filtration in this work was modified from Bureau of Community Technology Department of Science Service Ministry of Science and Technology. The technology communication of the production household-water filtration was conducted by workshop procedure. The production household-water filtration was conducted step-by-step. All participants can produce the household-water filtration by themselves.

This research project presents about the design and construction of a five-phase generator for producing magnetic force along the shaft axis that there are various important elements which should be considered in the processes of the design and construction such as flux per pole number of poles number of turns rotor speed and winding coefficient of coils. The experiment result is found that the five-phase axial flux permanent magnet generator along the shaft axis can produce DC voltage by the efficiency without load and with load. Furthermore this contribution can be used to produce electricity with other renewable energy such as electricity from wind energy.

This paper presents the simulation and experimental result of class-E power amplifier. It is often used in designing a high frequency ac power source because its ability to perform the conversion efficiently even at high frequencies with significant reduction of switching losses. This paper aims to compare the transmission performance of electrical power between the air core transformer and iron core transformer which the identical input voltage of 50 VAC. Both transformers are designed to step voltage up (step up transformer) ratio of 1:4.5. The Arduino microcontroller Arduino was used to generate a pulse width modulation (PWM) with operating frequency of 3.74 kHz. IC gate drive TC4422 was used to drive the IRF510 MOSFET. Based on the simulation and experimental results the power loss in air core transformer is 75 percent while power loss in iron core transformer is 0.2 percent. The maximum distance that can transmit electric power of air core transformer is 9.3 centimeters.

The magnetic properties of Ba2FeMoO6 (BFMO) BaCO3 (Barium carbonate 99.9%) Fe(NO3)3.9H2O (Iron(II) nitrate 99.0%) and Mo03 (Molybdenum trioxide 99.0%) have been characterized. A slurry was prepared by mixing the powders with deionized (DI) water at a ratio of 1:7.5: by solid state reaction method through compression. In the case of BFMO sintering at 800 °C for a 4 6 and 10 hours. exhibited the largest hysteresis loop at 50 K. In addition the values of Ms and Mr indicate ferromagnetic behaviour in BFMO ceramics sintered from 600 °C to 800 °C. Finally the value of magnetization was reduced by using a lower sintering temperature SEM analysis revealed the physical appearance of sintered BFMO ceramic and showed the morphology of the BFMO powder was. coarse with an average diameter of 2 microns