By A. A. Collyer
Is helping the person with no formal education in plastic fabrics during the maze of fabrics choice to his ultimate target. people with a simple wisdom of this region will enjoy the simpler elements of the consultant
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Additional info for A Practical Guide to the Selection of High-Temperature Engineering Thermoplastics
H. A. (Ed) Handbook of Plastics and Elastomers, McGraw Hill, New York, 1975 5. , Plastics and Rubber, Mechanical Engineering Publications Ltd, London, 1986 6. A. , Materials Science and Technology, 2 , 1986, 3 3 7 - 3 4 3 7. 'Motor b r u s h h o l d e r m o u l d e d in P B T , Performance Plastics, J u n e 1987. 9-10. High 8. H. , Polymer Products: Design, Materials and Processing, Chapman and Hall Ltd, London and New York, 1986 9. Fulmer Materials Optimizer, Fulmer Research Institute Ltd, Slough, and Elsevier Applied Science Publishers, London and New York, 1988 10.
In practice, a designer would have a thicker product section in the plastic to give an equivalent stiffness to the aluminium product. Hence costing the material is not always clear cut. It s h o u l d also be remembered that the plastic parts could probably be processed more economically than the aluminium part. 4, the projected selling price should be compared with that of existing products, if there are any. If the product is competitive then the final stage of The choice of material should be checked by c o n s u l t i n g materials suppliers and manufacturers.
X5 is the time required to plasticate the next shot. 16 The production rate and the length of the run in parts per hour, n, is given by: 45 Selection of High-Temperature Engineering Thermoplastics n = 36QQ c τ where τ is in seconds This, however, does not allow for any scrap or downtime. 17 and the length of the run will equal the number of parts required, N, divided by re Tb = Nx 3 6 0 0 UDc 3. 5. Is the chosen machine large enough to cope with this value? 4. 16. 5. As a double check calculate the required s h o t s i z e from t h e m a c h i n e u s i n g E q u a t i o n 3 .