This research was aimed to study employees’ loyalty in manufacturing industry as well as motivation influencing their loyalty. The samples were 360 employees working in the Food manufacturing industry in six districts in Nonthaburi. The questionnaire was used as a tool to collect data which were analyzed by statistics including percentage mean standard deviation. to test the hypothesis T-test one-way Anova and Multiple Regression Analysis were applied. It was found that most employees werefemale over 36 years of age with lower degrees than bachelors degrees 10000 - 15000 baht monthly income and more thansix years of work experiences. In the overall they had average motivation in performing their work in terms of incentives and supporting factors. Most employees were highly loyal to the organization as a whole namely awareness feelings and expressions respectively. The hypothesis testing determined the statistical significance level at 0 . 0 5 revealed that different genders showed different feelings however they were not different in terms of expressions perceptions and loyalty to the organization. Different ages differed in terms of expressive behavior feelings perceptions and loyalty to the organization.

At present a problem found in the soft candy producing process in the food producing department of Company Case Study is time-consuming roller washing process due to an ineffective washing process. A roller is washed one by one from a total of 10 roller (a set) in one machine. As a result the operation rates of other producing processes have been forced to delay. The objective of this research is to resolve the problem found in the process of roller washing by designing a machine for washing a set of roller per time. The research begins from examining design concepts of roller washing machine from patents and the current quantity of water and stream used for washing before conducting design of a new soft candy type roller washer machine. And eventually the efficiency of new roller washer machine is compared with current one. The findings indicate that the newly developed design can reduce washing period from 24.48 minutes/set to 5.56 minutes/set and increase operation time by 18.92 minutes or accounting for 77.28 percent. Meanwhile water quantity used in the process is reduced from 124.82 liters/set to 28.35 liters/set and stream quantity used in the process is also contracted from 0.83 kilogram/hour/set to 0.18 kilogram/hour/set. This reduction can save expenses equal to 28795 baht/year. As the budget for making new roller washer machine is 53000 baht and payback period is only 1.84 year.

Aluminium alloys was used in the automotive parts industry increased for compensate steel parts material due to its lightweight and good surface. Since aluminium alloys are there relatively low mechanical properties although they can be deformed easily but the major limitation is their low formability. Especially the less bending radius which is often bending surface damaged easily. In the present work five-difference ratio of sheet thickness and bending radius for study to the bendability of cold rolled aluminum alloys AA6016 at low bending radius. The bending test by Air-bending method according to ISO 7438: 2010. To compare the results every 15 degrees. The mechanical behaviour surface roughness microstructure and damage evolution in the fillet region were analysed by experimental research. The experiment clearly showed that the Spring-back angle and bendability tend to decrease as the bending angle and material thickness increase. Due to the high tensile stress on the bending surface it effected to the surface roughness increases rapidly and led to the damage on the specimen bending surface. The initial cracks occur on the middle of the outer surface curvature and propagation in the shear plane pattern to the middle of the sheet thickness along the grain boundary. This is the consequence of plastic deformation by bending test.