Air-cooled electromagnetic heating device for plastic extrusion equipment

Abstract

The invention relates to an air-cooled electromagnetic heating device for plastic extrusion equipment. The device comprises a thermal insulation layer, an electromagnetic induction coil and a temperature measuring element, wherein the thermal insulation layer is sectionally wound around a charging barrel, the electromagnetic induction coil is wound around the thermal insulation layer, and the temperature measuring element is exposed on the charging barrel; in addition, the air-cooled electromagnetic heating device also comprises a cooling system and a controller, wherein the cooling system is used for cooling the charging barrel, one end of the controller is connected with a screw motor status test element and the temperature measuring element, and the other end of the controller is connected with the thermal insulation layer and the cooling system. Detection signals of the screw motor status test element and the temperature measuring element are fed back to the controller so as to control the operations of the cooling system and the electromagnetic induction coil. The air-cooled electromagnetic heating device disclosed by the invention has the advantages that the precise control on temperature and the maximum utilization of shearing heats in plastic processing are realized; and compared with traditional resistance heating, more than 90% of power is saved; and compared with the existing electromagnetic heating device, and 50% of power is saved.

Description

Technical field [0001] The invention relates to a heating device for plastic extrusion equipment, in particular, an air-cooled electromagnetic heating device for a plastic extruder with shear heat for plastic wire drawing, pelletizing, film blowing and the like. Background technique [0002] The plastic industry is a rapidly developing material industry. Plastic products are widely used in industrial and agricultural production and daily life. Extrusion equipment is the main equipment for plastic processing. The production process of plastic products requires heating. The existing plastic extrusion equipment is electrically heated. There are two types of heaters: resistance heater and electromagnetic heater. In order to solve the shortcomings of resistance heater, China CN2774753Y discloses an "electromagnetic heating device for plastic and rubber equipment," which includes a hopper (1) and a hopper (1) A feeding tube (2) is provided on the upper part, the center of the feeding t...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing electromagnetic heating device is always in the alternate work of heating and stopping heating during the plastic extrusion process, which causes excessive power consumption, short device life, many faults and the temperature control caused by the lack of a special cooling system for the above device Poor precision affects production stability and leads to a decline in product quality

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