Material Handling study

Assumptions having to do with lifting operations need to be spelled out as a basis for the Material Handling study. Issues to be itemized include ... 

Based on a Material Handling Study, identify the hazards associated with the movement of heavy objects, e.g., a drop from a crane transferring equipment from a supply boat to a deck laydown area. 

When experiments are carried out to select a suitable dryer and to obtain design data, the effect of changes in various extern variables is studied. These experiments should be conducted in an experimental unit that simulates the large-scale diyer from both the thermal and the material-handling aspects, and only material which is truly representative of full-scale production should be used. 

Modern materials handling techniques in US Army Ammunition Plants are detailed in the Refs given under Modernization Engineering Project for US Army Ammunition Plants in this Vol, A study of materials handling at the Louisiana Army Ammunition Plant, carried out under the above project, is reported in Ref 6. The principal objectives of this study were to develop recommendations to modernize materials handling in a cost effective and safe manner. 

Modernization of Materials Handling in LAP Plants. Phase li. Total riant Study of Louisiana AAP , Contract DAAA21-74-C-0210, Industrial Technological Associates, Inc, Bethesda, Md... 

The instrument has been evaluated by Luster, Whitman, and Fauth (Ref 20). They selected atomized Al, AP and NGu as materials for study that would be representative of proplnt ingredients. They found that only 2000 particles could be counted in 2 hours, a time arbitrarily chosen as feasible for control work. This number is not considered sufficient, as 18,000 particles are required for a 95% confidence level. Statistical analysis of results obtained for AP was impossible because of discrepancies In the data resulting from crystal growth and particle agglomeration. The sample of NGu could not be handled by the instrument because it consisted of a mixt of needles and chunky particles. They concluded that for dimensionally stable materials such as Al or carborundum, excellent agreement was found with other methods such as the Micromerograph or visual microscopic count. But because of the properties peculiar to AP and NGu, the Flying Spot Particle Resolver was not believed suitable for process control of these materials... 

The DEP of numerous particle types has been studied, and many applications have been developed. Particles studied have included aerosols, glass, minerals, polymer molecules, living cells, and cell organelles. Applications developed include filtration, orientation, sorting or separation, characterization, and levitation and materials handling. Effects of DEP are easily exhibited, especially by large particles, and can be applied in many useful and desirable ways. DEP effects can, however, be observed on particles ranging in size even down to the molecular level in speciJ cases. Since thermal effects tend to disrupt DEP with molecular-sized particles, they can be controlled only under special conditions such as in molecular beams. 

For all raw materials, the current Material Safety Data Sheets and any other handling and storage information must be obtained from the raw material supplier, studied, and kept on hand. The recommendations contained in this data must be complied with. 

Modern methods of material handling, both of the raw plastic and the finished product, are becoming more generally employed, further reducing costs of the finished part (Chapter 18). The reduction of raw material inventory is seriously considered, and studies of production control methods are no longer uncommon, even by the small molder. Methods such as these are important in making molded parts less expensive to manufacture. 

Table VII" summarizes the cost of process equipment and associated raw material handling equipment required to process SMC, PC alloy and PU-RRIM. A range of prices as well as an average price 1s Indicated. For the purpose of this study this average price was used. 

National Safety Council, 1992, ISBN 0-87912-167-X, 386 pages, 62.95. Topics Indude environmental management, hazard communication, safety management and training, inspections, material handling and storage, accident investigation, and case studies. 

---