Bronzing roller electric heater for cork paper bobbin bronzing machine

Abstract

The invention discloses a bronzing roller electric heater for a cork paper bobbin bronzing machine. The electric heater comprises a bronzing roller and rotation shafts at two ends of the bronzing roller, wherein heating holes are axially arranged on the circumferential wall of the bronzing roller, heating wires are arranged in the heating holes, electric brushes are connected at the outer ends of the heating wires and connected with a power supply and a temperature control system. The heater has the advantages of simple structure, small size, temperature control range being 20-300 DEG C and temperature control precision of plus or minus 5 DEG C, accurate temperature control, short temperature rise time being not more than 15 minutes, fast temperature adjustment and high bronzing process quality, has no soot, no noise, low energy consumption, energy conservation and environment friendliness, and convenience and fastness in version change since the heating lines are used for direct heating, and can greatly improve the product quality and working efficiency, effectively enhance the operation environment and thoroughly eliminate the hidden safety hazard.

Description

technical field [0001] The invention belongs to the technical field of automatic temperature control electric heating devices, and in particular relates to an electric heating device for hot stamping rollers of a tipping paper hot stamping machine. Background technique [0002] At present, the hot stamping roller heating device of tipping paper hot stamping machine is mainly composed of fuel tank, electric heating pipe, oil pump, oil pipeline, rotary joint, hot stamping roller, steam exhaust device, valve, temperature measuring element, temperature controller and contactor and other components. , its working principle is: the hot stamping roller rotates at high speed, the oil tank is placed statically on one side of the hot stamping roller, the heat transfer oil in the oil tank is heated by the electric heating tube, and then pressurized by the oil pump and transported to the hot stamping roller through the oil pipeline, and then the heat transfer oil is again It flows back ...

AI Technical Summary

Problems solved by technology

[0003] The existing hot stamping plate roller heating device of the tipping paper hot stamping machine has many defects in temperature control accuracy, heat energy loss, environmental protection, energy saving and safety: (1) The device is bulky, with many and scattered high-temperature components, large heat loss, and energy consumption At the same time, the temperature rise in the workshop is too high, especially in summer, and the ambient temperature is difficult to control; (2) The temperature measured by the temperature controller is the temperature of the oil tank, not the surface temperature of the bronzing plate roller required by the process. There is a large gap between the two. Error, the operator cannot accurately control the temperature, and the temperature control accuracy is low; (3) Factors such as poor steam exhaust, carbon deposits in the oil circuit, and inherent characteristics of the oil cycle cause poor circulation of the heat transfer oil, resulting in large temperature fluctuations of the bronzing plate roller; (4) bronzing The version roller is a cylinder with a length of 600mm and a diameter of 140mm. Due to the inherent characteristics of heat conduction oil heating, the temperature difference between the front, middle and end sections of the bronzing version roller can reach a maximum of 10°C; (5) The exhaust port of the heating system is connected to the Rotary joints and other parts will emit a certain amount of oil fume, vaporized heavy metals, sulfide and other harmful substances, which cannot be completely eliminated, and directly endanger the health of operators; (6) The heat transfer oil circulating in the heating system is 60 liters, resulting in slow heating of the bronzing plate roll , Every time you start the machine, you need to preheat before normal production. It takes 40 minutes for the bronzing plate roller to heat from normal temperature to the temperature required by the process (about 110°C). The heating time is long and the production efficiency is low; (7) Leakage, vaporization, cleaning accumulation Factors such as carbon and replacement of hot stamping rollers cause a single hot stamping machine to consume 90 kg of heat transfer oil per year, which is wasteful and pollutes the environment; (8) Leakage of high temperature heat transfer oil poses a great safety hazard

[0004] The above-mentioned defects cannot be eliminated fundamentally, which directly affects the quality of the hot stamping process and reduces the yield of products

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