By Natti S Rao
Offers a brief reference on easy layout facts for resins, machines, elements, and tactics displaying the best way to follow those info to unravel sensible difficulties. Softcover. DLC: Plastics.
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Extra resources for Design Data for Plastics Engineers
Colloquium, IKV, Aachen 1978 Rauwendal, C: Polymer Extrusion, Hanser, Munich 1986. : Kunststoffe 61 (1971), p 421 3 Transport Properties of Molten Polymers The basic principle of making parts out of polymeric materials lies in creating a melt from the solid material and forcing the melt into a die, the shape of which corresponds to that of the part. Thus, as Fig. 1 indicates, melt flow and thermal properties of polymers play an important role in the operations of polymer processing. Plastics solids Plastication Melt Shaping Cooling Part removal Fig.
These constants can be determined with the help of the program of Rao , which is based on multiple linear regression. arpcn and prints out the coefficients a0, Ci1 and so on for the best fit. 1 Shift Factor for Crystalline Polymers The influence of temperature on viscosity can be taken into account by the shift factor aT . 2 Shift Factor for Amorphous Polymers The shift factor O1. for amorphous polymers is derived from the WLF equation and can be written as C2 +(T-T0) where C1, c2 resin-dependent constants T = melt temperature ( 0 Q T0 = reference temperature (0C) The expression for calculating both the effect of temperature and shear rate on viscosity follows from Eq.
Designing Machines and Dies Polymer Processing, Hanser, Munich 1981 Brochure: Advanced CAE Technology Inc. 1992 Proceedings, 9. Colloquium, IKV, Aachen 1978 Rauwendal, C: Polymer Extrusion, Hanser, Munich 1986. : Kunststoffe 61 (1971), p 421 3 Transport Properties of Molten Polymers The basic principle of making parts out of polymeric materials lies in creating a melt from the solid material and forcing the melt into a die, the shape of which corresponds to that of the part. Thus, as Fig. 1 indicates, melt flow and thermal properties of polymers play an important role in the operations of polymer processing.
Design Data for Plastics Engineers by Natti S Rao