Automated mixing

Pellets can be blended in either barrels cr an automated mixing system such as the two-screw proportioning systems. Blending should take only 2-3 min. Overblending can cause reduced material properties as a result of glass fiber breakage. 

Envelopes should be thought of as automated fader controls on any track and, therefore, automated mixing controls. Envelopes can be very effectively used to control brief spikes in an event that cause clipping or can be used to temporarily increase the volume of a track for emphasis. While more time consuming than allowing the volume to be controlled exclusively by the volume fader on a track and remain flat throughout a project, envelopes are extremely powerful and very worthwhile when used correctly. 

Polymer Flood Technology Field Injection of High Viscosity Polyacrylamide Solutions With an Automated Mixing Process," paper presented at the 1989 5th European Symposium on Improved Oil Recovery, Budapest, Hungary, April 25-27. 

In the case of two-part room temperature adhesive, it is implemented on the facing sides of the adherends after manual or automated mixing during the open time period of the mixture (45-90 min) and afterward, pressure tools are placed on the assembly for delivering the pressure required for bonding (between 200 and 1,000 HPa). 

For soft finishes, solventbased and waterbased coatings are available both in middle and northern Europe, with the waterbased widely dominating the market. The chemical basis of waterbased finishes is based on a 2K polyol-isocyanate. Suitable polyols are special aqueous polyurethane dispersions. The isocyanate is provided in liquid form and usually contains a small amount of suitable solvents. Mixing to get the paint ready to spray can be done in small lots as most of these 2K materials exhibit a pot life of about one hour at ambient temperature. However, it is best to apply soft coatings through 2K automated mix equipment with moditied statical mixers. 

In an alternative procedure (84), the electrolyte is pumped through the cells at such a rate that the outlet concentration is 50 g/L MnSO and 67 g/L H2SO4. This spent electrolyte is then mixed with equal parts of make-up solution containing 150 g/L MnSO and the mixture returned to the electrolysis step. The electrolysis is continued over a period of days and terrninated when the EMD layer deposited on the anode reaches a specific thickness, usually on the order of 1—3 or 6—8 mm. Following completion of the electrolysis cycle, the entire electrode assembly is removed from the cell for removal of the deposited EMD, either manually or by an automated system (85). The product is repeatedly washed with water to extract the occluded acid (83) and dried at about 85°C in air. 

It is not tme either that vinyl is the problem in municipal recycling because it contaminates other resins. Contamination occurs whether or not vinyl is present. Other resins are just as much a contamination problem as vinyl. Except for commingled plastics apphcations, different plastic materials caimot be mixed successfiJly in most recycled products apphcations. This is why it is cmcial to separate efficientiy one plastic from another. Because of the chlorine that is present in it, vinyl lends itself very weU to automated sorting technology. 

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