Mann Egerton Show Latest Designs
Page 43
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hAANY interesting examples of their in current production of insulated and refrigerated bodies and containers were shown at an exhibition staged by Mann Egerton and Co., Ltd., at the beginning Of the week at their Norwich works. Demonstrations were also given of new methods of building insulated bodies and of reducing the internal temperature of containers.
The latest technique in applying an insulating layer shown used Celspray foam — a product of the Baxenden Chemical Co., Ltd. This is a twocomponent polyester-based polyurethane resin and is sprayed on to the body side using Aerograph DeVilbiss equipment before the outer skin is attached. The components reach the surface as a liquid and immediately begin to expand. When the required thickness has been obtained any excess is trimmed off and the outer .panels fixed in place.
A method of building insulated bodies using " sandwich" panels was also shown. In this, Plasticell—a high-strength expanded p.v.e. manufactured by Microcell, Ltd.--is skinned on both sides with 20G, light-alloy sheet bonded with bitumenistic resin adhesive. All joints in the insulating material are bonded and keyed together to form a complete section. The sections are similarly joined.
A Mann Egerton container was used by the Distillers Co., Ltd., to demonstrate the effectiveness of their DisChiL system in producing an immediate tetnperature drop. A measured quantity of liquid carbon dioxide was introduced through a special vent into the closed container. In a very short time, the internal temperature dropped by some 50°F. The system is generally used with conventional refrigeration methods and eliminates the time taken to reduce the temperature to the required level,