Double-layer coextrusion equipment and technology for ceramic polyolefin fire-resistant wire

Abstract

The invention discloses double-layer coextrusion equipment for a ceramic polyolefin fire-resistant wire. The double-layer coextrusion equipment comprises a caterpillar-tractor (1), a first plastic extruder (2), an air cooling device (3), a second plastic extruder (4) and a thermostatic water bath (5), which are sequentially arranged from left to right, wherein the top of the first plastic extruder(2) is connected with a feeding and drying system (6); a vacuum supply pump (7) is arranged between the air cooling device (3) and the second plastic extruder (4); and a suction opening of the vacuumsupply pump (7) extends into the second plastic extruder (4). The invention further discloses a double-layer coextrusion technology for the ceramic polyolefin fire-resistant wire. The double-layer coextrusion equipment and technology have the beneficial effects that the equipment is compact in structure, the manufacturing process is simplified, the production efficiency is improved, an outer insulating layer is seamlessly and tightly combined with an inner insulating layer, the quality of a product is significantly improved and the service life of the product is significantly prolonged.

Description

technical field [0001] The invention relates to the production technology of ceramicized polyolefin fire-resistant wires, in particular to a double-layer co-extrusion equipment and co-extrusion process for ceramicized polyolefin fire-resistant wires. Background technique [0002] With the rapid development of the national economy and the continuous improvement of people's living standards, social electricity consumption has greatly increased. With the sharp increase in the consumption of various electrical equipment, electrical fire accidents have also increased sharply. According to statistics, about more than 100,000 fires occur in my country every year, and the direct property loss is more than one billion yuan. Among them, fires caused by electrical reasons such as short circuit of wires, overload, and electrical equipment failure accounted for about 30% of the total, and the number of occurrences of electrical fires and the losses caused ranked first among all types of...

AI Technical Summary

Problems solved by technology

However, because the inner and outer insulation layers are extruded in two separate steps, the concentricity is poor, and there is an air gap between the two layers of insulation, which makes the outer insulation layer and the inner insulation layer not tightly bonded, resulting in the final production of ceramic polymer The poor quality of olefin refractory wire products shortens its service life, so ordinary ceramic polyolefin refractory double-layer insulated wires are difficult to promote in the market

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