By A. A. Collyer
Is helping the person with no formal education in plastic fabrics during the maze of fabrics choice to his ultimate aim. people with a easy wisdom of this quarter will enjoy the simpler elements of the advisor
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Extra info for A Practical Guide to the Selection of High-Temperature Engineering Thermoplastics
It is a menu-driven program similar to EPOS with the same kind of capability. Its data 34 (2) DACAPO Materials selection procedures bank covers all the Akzo plastics and is constantly being developed both in the database and in the programs. 4 shows the main menu of DACAPO. The program uses a different approach to the other materials selector programs, in that the process route can be selected first. After selecting, for example injection moulding, a particular property is chosen and nine ranges of values appear on the screen.
Much depends on whether the product is to be moulded in-house (captive-moulder) or whether the work is to be given to a custom moulder. If one is going to become a captive moulder then the cost of the equipment, the material and the mould must be accounted for, and the style of costing adopted will be the standard method of the company. The cost of installing machines may not be recovered in the same way as the machine cost, but may be covered in overheads. When dealing with a custom moulder, one must use a costing method to estimate the tender; an initial estimate of this to within 20% should be considered reasonable [1,2].
12. From this, calculate MHR. 8. 20. Hence find the cost per 1000 parts. 9. Calculate the total cost per 1000 parts, that is, the s u m of the material cost, the mould cost attributed to these parts and the fabrication costs. 1 where Cm is given by E q u a t i o n 3 . 19. 3 A summary of the costing method The costing is often carried out per 1000 items. The calculations of Cm and Cp are easy but Cf is more difficult. A suggested order for calculating Cf is: 1. 2. 4). If the melt used h a s a high viscosity the mould pressure may be higher than 1 0 4 psi (69 MPa).
A Practical Guide to the Selection of High-Temperature Engineering Thermoplastics by A. A. Collyer