Forming process comparison

It is noteworthy that 108 reacts in AcOH with benzenesulfenyl chloride to give a 1 1 mixture of the sulfur analogues of 138 and 140, but when the reaction is carried out in the presence of LiClC>4 a complex mixture of at least five products was detected. From this comparison the authors suggest that areneselenenylation is much less affected by the solvent than arenesulfenylation, and if the reaction profiles for the two product-forming processes are assumed to be similar, the difference in product distributions can be interpreted in terms of a more efficient bridging ability of selenium than that of sulfur. In the addition of selenenyl derivatives, the solvent-dependent product distribution has also... 

The inverse relation be een particle size and I/Cl provided a tracer by which the role of the sea-salf particles in the rain-forming process can be studied. Comparison of the I/Cl ratios in the sea-salt particles in marine air to those in raindrops from clouds formed in this air indicated that only the small end of the sea-salt particle spectrum plays any role in the rain formation 110). 

For process comparison, the stationary form of Eqs. 6.202 and 6.203 is normally used, in which the accumulation terms are zero. To transfer the results of TMB to... 

As an example for a bulk metal forming process with thermomechanical coupling, we present the forming process under induction heating. For a more detailed treatment, the reader is referred to Okman et al. 2006. For hollow shafts made of material X5CrNil89 with initial dimensions as Dq = 30 mm, Dj = 22 mm Lo = 60 mm Lj/Lo = 0.75, the numerical predictions and their comparison with the experiments are given in Fig. 4 for heating time 27 s. 

One of the major application and commercial properties of polymers is the capacity of the solid to be reshaped under temperatures low in comparison to the molding temperatures of metals. A listing of several thermal forming processes for plastics is given in Table 10. 

A first comparison of the three different types of 3D warp interlock fabrics using the four measured parameters can be done and helps to highlight the influence of the weave diagram on the global behaviour of the final preform in both warp and weft directiOTis after the forming process using a semi-hemispherical punch. 

Film forming materials, plasticizer type and amount and other additives affect film properties differently. Table 1 and 2 show the water vapor permeability (WVP) and oxygen permeability (OP) of different polysaccharide-, protein-, composite- and frait and vegetable-based films with various plasticizers using different processes. Comparisons among them are difficult because of different film compositions, test conditions (RH, temperature), methodology, and number of replications were used in each woik. 

In the pure metal stamp forming process, both mold halves are made from metal. In silicone stamp forming, one mold half is mostly made from elastic material (mostly the upper mold half). Table 1.11 shows a comparison between both processes concerning the most important features. 

Because the laminate is not in contact with the mold, the temperature loss (in comparison to the stamp forming process) worsens, which means that the cooling or cycle times increase. The service life of the mold is increased in comparison to the stamp forming process because no fiber marks occur on the mold surface due to the protection of the diaphragms so mold wear is then significantly decreased. 

---