Molds field

In this section we focus on injection molding. For us, CAE will involve the simulation of the injection-molding process. Injection molding is the most mature area of the plastics industry with respect to utilization of CAD/CAM and CAE. Moreover, developments in the injection-molding field represent the state of the art. Of course, many of the general ideas of simulation of injection molding may also be applied to other plastic part production methods. 

The CAE technique can be effectively applied, as an example, in the injection-molding field to... 

The nature of the penicillin derivatives accessible by this "feeding" route was severely limited by the fact that the acylat-ing enzyme of the Penicillium molds would accept only those carboxylic acids which bore at least some resemblance to its natural substrates. A breakthrough in this field was achieved by the finding that rigid exclusion of all possible side-chain substrate from the culture medium afforded 6-APA as the main fermentation... 

When using molded plastics parts such as the connectors and the circuit supports, it is important to make sure that the moldings, in addition to being made to close tolerances, be made under molding conditions that make for stable products. Electrical products are subjected to strong electrical fields in addition to the usual environmental abuse. Distortion of the product can lead to serious electrical malfunction by changing spacings that will alter electrical characteristics and if... 

Polyester chemistry is the same as studied by Carothers long ago, but polyester synthesis is still a very active field. New polymers have been very recently or will be soon commercially introduced PTT for fiber applications poly(ethylene naph-thalate) (PEN) for packaging and fiber applications and poly(lactic acid) (PLA), a biopolymer synthesized from renewable resources (corn syrup) introduced by Dow-Cargill for large-scale applications in textile industry and solid-state molding resins. Polyesters with unusual hyperbranched architecture also recently appeared and are claimed to find applications as crosstinkers, surfactants, or processing additives. 

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