Baker Perkins

The Kleber-Colombes rigid PVC foam (253,254) is produced by compression mol ding vinyl plastisol to react and gel the compound, followed by steam expansion. The process involves mixing, mol ding, and expansion. The formulation consists of PVC, isocyanate, vinyl monomers such as styrene, anhydrides such as maleic anhydride, polymerization initiators, FC-11, and nucleators. The ingredients are mixed in a Wemer-Pfleiderer or a Baker Perkins... 

Goiu tc.s Baker Perkins Itic. To convert inches to aaitiineters, nmltiph l) 2.,54 to convert pounds to kilograms, inultiph l) 0.4,54 to convert horsepower to kike watts, nmltiph l) 0.746 mid to convert gallons per minute to cul)ic meters per hour, multiph l) 0.227. 

The current producer of these machines is Baker Perkins Ltd, which has (as of April 2006) regained its independence and has separated from Invensys pic. 

POD system The POD system consists of a Baker-Perkins Model A-l Contactor (that is, a Podbielniak centrifugal contactor) fabricated in stainless 316. A variable speed drive is capable of rotating the unit at speeds up to 10,000 rpm. The normal operating speed is 8100 rpm. 

POD Baker-Perkins A-l centrifugal contactor,316SS maximum temperature, 250°F ... 

The final mixing takes place in a large Werner-Pfleiderer (or Baker-Perkins) type sealed mixer of the type extensively used in smokeless powder manufacture (Fig. 206). A capacity up to 2000 lb is used in the case of thiokol propellants. After the premix has been added to the mixer, the finally ground oxidant is added. This material is conveyed to the mixer in a closed container and is added so that the... 

Diffusion Mixers (Tumble) Baker-Perkins L.B. Bohle Dierks Shone Diosna (Fluid Air) GEI-Collette (GEI International) Key International Littleford Day Lodige Powrex (Glatt) Processall Werner Pfeiderer Zanchetta (Romaco) Paul O. Abbe... 

Baker-Perkins F.B. Bohle Dierks Shone Diosna (Fluid Air) GEI-Collette... 

Figure 10.15. Some mixers and blenders for powders and pastes, (a) Ribbon blender for powders, (b) Flow pattern in a double cone blender rotating on a horizontal axis, (c) Twin shell (Vee-type) agglomerate breaking and liquid injection are shown on the broken line, (d) Twin rotor available with jacket and hollow screws for heat transfer, (e) Batch muller. (f) Twin mullers operated continuously, (g) Double-arm mixer and kneader (Baker-Perkins Inc.), (h) Some types of blades for the double-arm kneader (Baker—Perkins Irtc.).

Figure 14.15. A horizontal rotating extractor and two kinds of centrifugal extractors, (a) The RTL (formerly Graesser raining bucket) horizontal rotating extractor both phases are dispersed at some portion of the rotation RTL S. A., London). (b) Operating principle of the Podbielniak centrifugal extractor it is made up of several concentric perforated cylinders (Baker-Perkins Co.), (c) The Luwesta centrifugal extractor (schematic diagram) Luwa Corp.).

The screws of the Baker Perkins mixers 26) manufactured in the USA and Great Britain are also sectional units. 

The Baker-Perkins double-screw mixer-extruders manufactured in the USA and Great Britain are employed for processing thermosetting materials, more specifically, urea-formaldehyde compounds. Basic specifications of these units are given in Table 5 26). 

A distinguishing feature of the Baker Perkins mixers is that their casings may be opened horizontally to permit inspection or cleaning of the screw or cylinder. 

Gamlen, M. and Eardly, C. Continuous granulation using a Baker Perkins MP50 (Multipurpose) Extruder.Drug Dev. Ind. Pharm., 12(1986), 1710-1713. 

Fig. 10.8 Fully intermeshing, co-rotating elements in configurations matching square-pitch screws, (a) Forward screw conveying elements with different numbers of lobes (b) forward staggered kneading paddles (a.k.a., disk elements) representing leaky screw elements, and (c) neutral configuration. [Reprinted by permission from D. B. Todd, APV (Baker Perkins) Systems, in Plastics Compounding—Equipment and Processing, D. B. Todd, Ed., Hanser, Munich, 1998.]...

D. B. Todd, U.S. Patent 4,136,968 to Baker Perkins (1979) also, D. B. Todd, Energy Dissipated in Twin Screw Extruders, SPE ANTEC Tech. Papers, 26, 220 (1980). 

FIGURE I I Westfalia countercurrent extraction decanter. (Baker-Perkins technical literature. Reprinted from Verrall35 by permission of Oxford University Press.)... 

FIG. 15-55 Podbielniak centrifugal extractor. (Courtesy of Baker Perkins Inc.)... 

Data from APV Baker Perkins, Inc. To convert feet to meters, multiply by 0.3048 to convert gallons to cubic meters, multiply by 3.78 x 10" and to convert horsepower to kilowatts, multiply by 0.746. 

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