High-heat-absorption fixing roller for high-speed engineering duplicating machine and manufacturing method of high-heat-absorption fixing roller

Abstract

The invention discloses a high-heat-absorption fixing roller for a high-speed engineering duplicating machine. The technical scheme is characterized in that the high-heat-absorption fixing roller comprises a tubular roller body, the inner surface of the roller body is coated with a far infrared heat absorption coating, the inner wall of the roller extends radially and outwardly to form a plurality of recess portions distributed peripherally uniformly, all of the recess portions extend along the length direction of the roller body, and the inner wall of the roller body is provided with a high-heat-absorption copper tube. The high-heat-absorption fixing roller for the high-speed engineering duplicating machine has advantages of quickness in heat absorption, uniform roller surface temperature, convenience in manufacturing, freeness of gas adding and recyclability of the roller body.

Description

technical field [0001] The invention relates to a fixing roller, more specifically, it relates to a high-end heat-absorbing fixing roller of a high-speed engineering copier and a manufacturing method thereof. Background technique [0002] The fixing roller is a key part of the fixing part of the copier, which is used to apply pressure and fix the copied toner image in a high temperature environment. At present, the fixing rollers used in the fixing device of high-speed engineering copiers on the market are generally made of aluminum alloy tubes, with high-power heating lamps installed in the roller body, and thermistors are installed at both ends of the roller body. The surface of the roller is sprayed with high temperature resistant fluorine coating. [0003] In the actual use of the high-speed engineering copier in the prior art, there are the following problems: the copy is output at high speed during the copying process, the temperature detection points of the thermisto...

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Problems solved by technology

[0003] In the actual use of the high-speed engineering copier in the prior art, there are the following problems: the copy is output at high speed during the copying process, the temperature detection points of the thermistor in the roller body are at both ends, and the machine automatically detects according to the set temperature, Because the inner diameter of the existing fixing rollers is relatively small and the heat-absorbing area is small, the heat energy generated by the high-power heating lamp cannot be absorbed by the roller body in time, and the heat energy spreads to both ends, resulting in higher temperature at the two ends of the roller than in the middle, and heat at both ends of the machine. When the sensitive resistor detects the set temperature, it will automatically stop heating. At this time, there will be a problem that the temperature in the middle of the roller is lower than that at both ends. When the copier is used continuously, the fixation at the two ends is firm, and the fixation in the middle is not firm; Fixing is even weaker, and the toner will be wiped off as soon as you wipe it with your hands, which cannot meet user requirements

[0004] The Japanese original roller has a number of holes on the roller wall. By adding high thermal conductivity gas into the holes, the temperature of the roller body surface can be increased and the printing quality can be improved. However, the manufacturing process of this kind of roller is complicated, and the roller surface cannot be reprocessed after it is worn. Non-stick fluorine coating; and because the non-stick fluorine coating is baked at 380 degrees, the roller body is equipped with heat-conducting gas, and the gas expands at high temperature, and the aluminum alloy roller body is easily deformed and cannot be recycled

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