ISOTEX Appl ica ti on: Therma l Insula ti on of P las ti fi ca ti on C yl inders ISOTEX - Insulating Blankets – Figure 1 GENERAL CHARACTERISTICS ISOTEX insulating blankets have been designed to protect, in the best way, the operators from the heat irradiating from the plastification cylinders. Made of a non conducting tissue padded with highly insulating material, they offer a very good thermal insulation of the plastification cylinder thus providing important savings in the request of electrical energy dedicated to heating. Thanks to their limited envelope (thickness = 15 mm or 25 mm) and to their high flexibility (typical in tissues) ISOTEX blankets can be installed where other types of insulating covers can not. The possibility to cut, in their surface, slots of different dimensions allows to employ ISOTEX blankets also in the cases where mechanical parts or temperature measurement devices alter the smoothness of the cylinder surface. Amongst the advantages of ISOTEX blankets, the following can be listed: High thermal insulation Non flammable Non toxic Incorruptible and stable in humid environment No absorbability of liquids Resistance to corrosion No chemical reactivity Stable mechanical and thermal characteristics, even at high temperatures Resistance to vibrations Low cost and easy installation. compact felt, whose compactness is not obtained by chemical binders but is the result of a mechanical operation which produces a matelassé, very dense felt. Its insulation capability is very high and it is capable to operate to temperatures as high as 650 °C. The felt fulfils the requirements of the U.S. military specification MIL-I-16411 as well as of U.S. Coast Guard specification 164009 and of military specification MIL-I2422 for non flammable and corrosion resistant materials. The main technical characteristics of this material are: Thickness: ½” or 1" (depending on customer choice) Fibre Diameter: 6 micron 3 Volume Density: 140 kg/m Surface Density: 1.8 kg/m² Operating Temperatures: ≤ 650 °C Weight loss at 650 °C: ≤ 2% Thermal Conductivity: see Table Temperature 205 °C 260 °C 315 °C Thermal Conductivity 0.041 kcal/mh°C 0.048 kcal/mh°C 0.059 kcal/mh°C 3. SPRING STAYS AND FIXATION HOOKS made of stainless steel AISI 302 resistant to high temperatures. This special material guarantees to the springs stays stable mechanical characteristics also after long periods of operation at high temperatures. Hooks, strings and eyelets are fixed onto the external surface of the blankets by through rivets. APPLICATIONS 4. INTERNAL TISSUE made of fibreglass suitable for high ISOTEX blankets are largely used in the thermal insulation of temperatures. It consists 100 % of a woof of type “E” plastification cylinders. Their flexibility, stability and resistance fibreglass continuous threads that undergoes a specific make them suitable for the insulation of other mechanical thermo-chemical treatment. Suitable for temperatures up components like valves, flanges, expansion joints, and hot to 700 °C parts in general. They turn out to be useful in the most different types of plants: ovens, tanks, railway and industrial vehicles, THERMAL INSULATION OF PLASTIFICATION CYLINDERS naval plants and thermal stations. Insulating plastification cylinders by means of ISOTEX blankets reduces considerable the thermal radiation towards TECHNICAL DATA (see Figure 1) the surrounding environment and the machine mounting 1. EXTERNAL TISSUE made of silicone-impregnated structure. A twofold result is therefore obtained: fibreglass. It consists 100 % of a woof of type “E” fibreglass continuous threads (borosilicate with a low content of 1. the thermal expansion of the machine structural parts is alkali). It is suitable for temperatures up to 500 °C. reduced 2. the work area is more comfortable for the operator and 2. INTERNAL FELT made of type “E” fibreglass suitable for presents no risks of accidental contact with high high temperatures, mechanically stretched. It is a very temperature zones.

ISOTEX Appl ica ti on: Therma l Insula ti on of P las ti fi ca ti on C yl inders The positive effects of ISOTEX insulating blankets have been measured in the frame of tests made on an injection press whose plastification cylinder had 120 mm x 980 mm length dimensions and hosted three heaters for a total power of a 10 kW (see Figure 2). Figure 2: temperature distribution in the vicinities of an injection press with cylinder 120 mm x 980 mm. Total heater power =10 kW without ISOTEX with ISOTEX INSTALLATION Thanks to its flexible structure, the ISOTEX blanket can be directly wrapped around the part...