By A. A. Collyer

Is helping the person with out formal education in plastic fabrics throughout the maze of fabrics choice to his ultimate aim. people with a uncomplicated wisdom of this quarter will enjoy the simpler elements of the consultant

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9 w h e r e e i s t h e c o s t of electricity. 17. When multi-cavity moulds are u s e d both s c r a p a n d d o w n t i m e will b e i n c r e a s e d because more c a n go wrong. This h a s to b e balanced against the potential increase i n production rate. 5 times the electrical cost. 85 Labour costs Labour costs per hour will be apportioned by multiplying the hourly wage rate by 5 2 / 4 8 and loading this by 6 0 % to cover overheads. The factor 5 2 / 4 8 o c c u r s b e c a u s e the employees have paid holiday.

1400 for 500 grades). Updates 37 Selection of High-Temperature Engineering Thermoplastics cost 10% of t h e s y s t e m price. CAPS Panorama costs £270 with no updating. Further details from: Polydata Ltd, Unit 16, IDA Enterprise Centre, Pearse Street, Dublin 2, Ireland: tel: (0001) 711350. (7) Plastics Education and Troubleshooting System (PETS) PETS, developed by GE Plastics Ltd, is a software package that uses expert knowledge In a system to diagnose processing faults. This system guides the user through typical moulding situations and to most likely corrective s t r a t e g i e s .

8 Finalizing the design Once the material selection, process selection and assembly selection have been made, the whole operation should be double checked using the following steps: • Consider a product of volume 25 ml, which could be made from aluminium, ABS, polycarbonate or polyacetal. 4. review the function of the part - has anything been overlooked? • review the appearance (style, colour, shape and surface finish), • is the design economical for tooling? • are the tolerances realistic? • are the details of the design correct?

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