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Method for producing transparent high-temperature electric heating membrane pipe with self-constant temperature

An electrothermal film tube and production method technology, applied to the shape of the heating element, the device for coating liquid on the surface, and the pretreatment surface, etc., can solve the problems of long film forming time, reduced service life, easy attenuation, etc., and achieve the coating thickness Uniformity, long service life, and short film-forming time

Active Publication Date: 2009-01-28
佛山康疆电器科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Electrothermal film is a heating material composed of thin film resistors. It has the advantages of small size and large contact area with heated objects. The 21st century belongs to the era of high-tech development. Most of the production methods of high-temperature transparent electrothermal film adopt the vapor deposition method. The disadvantages are that the thickness of the coating film is uneven, the film is easy to burn, the film forming time is long, up to 10 to 15 minutes, and the negative temperature coefficient is formed, that is, this With the increase of temperature, the resistance value of this kind of coating gradually decreases, which reduces the service life, is easy to attenuate, and has poor stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Ultrasonic cleaning of the tubular coating workpiece with pure water and drying at 150°C, then coating the non-coating area with magnesium oxide slurry, and then drying at 150°C, then fixing the dried workpiece on the fixture of the coating machine, and placing it side by side Into the furnace cavity of the coating machine at a temperature of 550 ° C, start the spraying device of the coating machine to spray the workpiece, the coating solution consists of 8 kg of tin dichloride, 1 kg of antimony chloride, 1 kg of nickel dichloride, 1 kg of copper dichloride and 10 kg of ethanol Mixture, the spraying pressure is 0.05MPa, within 60 seconds, the surface of the workpiece is coated with a transparent high-temperature electrothermal film, the coated workpiece is taken out of the furnace chamber of the coating machine and cooled to room temperature naturally, and then put into pure water for ultrasonic cleaning to remove the oxidation of the non-coated area Magnesium coating, t...

Embodiment 2

[0018] Clean the tubular coating workpiece with pure water ultrasonically and dry it at 180°C, then coat the non-coating area with magnesium oxide slurry, and then dry it at 180°C, then fix the dried workpiece on the fixture of the coating machine, and place it side by side The temperature is 530 DEG C in the furnace cavity of the coating machine, and the spraying device of the coating machine is started to spray the workpiece. The coating solution is the same as that in Example 1, and the spraying pressure is 0.1MPa. The surface of the workpiece is coated with a transparent high-temperature electrothermal film within 40 seconds. The workpiece is taken out of the furnace cavity of the coating machine and cooled to normal temperature naturally, then put into pure water for ultrasonic cleaning, removes the magnesium oxide coating in the non-coating area, and then dries at 180°C, and then fixes the workpiece on the fixture of the screen printing machine. Silver paste is printed on...

Embodiment 3

[0020] Clean the tubular coated workpiece with pure water ultrasonically and dry it at 200°C, then coat the non-coated area with magnesium oxide slurry, and then dry it at 200°C, then fix the dried workpiece on the fixture of the coating machine, and place it side by side The temperature is 500 DEG C in the furnace chamber of the coating machine, and the spraying device of the coating machine is started to spray the workpiece. The coating solution is the same as that in Example 1, and the spraying pressure is 0.4MPa. The surface of the workpiece is coated with a transparent high-temperature electrothermal film within 30 seconds. The workpiece is taken out of the furnace chamber of the coating machine and cooled to room temperature naturally, then put into pure water for ultrasonic cleaning, removes the magnesium oxide coating in the non-coating area, and then dries at 150 °C, and then fixes the workpiece on the screen printing machine fixture, and Silver paste is printed on the...

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Abstract

The invention relates to a method for producing a self constant-temperature transparent high-temperature electric heating membrane tube. The method is characterized in that a tubular metallic-membrane plating workpiece is cleaned and dried, a magnesia sizing agent is coated on the non-metallic-membrane plating area and is dried as well as is fixed on a clamp of a metallic-membrane plating device and is put inside a furnace cavity of the metallic-membrane plating device, the workpiece is coated by a spraying device and the surface of the workpiece is plated with a transparent high-temperature electric heating membrane and is cooled to the normal temperature, the workpiece is cleaned by ultrasound to remove the magnesia coating of the non-metallic-membrane plating area and is dried, the silver paste is printed on the workpiece by a screen printer to manufacture the electrode, the drying process is performed, and the workpiece is dried naturally to the normal temperature to manufacture the finished product of the self constant-temperature transparent high-temperature electric heating membrane tube. The method has the advantages that the thickness of the metallic-membrane plating is even, the plating time is short, the positive temperature coefficient is formed, the self constant temperature function is realized, the service life is long, the stability is good and the security and the effect are good.

Description

technical field [0001] The invention relates to a production method with a self-constant temperature transparent high-temperature electric heating film tube, belonging to the field of electric heating film production methods. technical background [0002] Electrothermal film is a heating material composed of thin film resistors. It has the advantages of small size and large contact area with heated objects. The 21st century belongs to the era of high-tech development. Most of the production methods of high-temperature transparent electrothermal film adopt vapor phase deposition method. The disadvantages are that the thickness of the coating film is uneven, the film is easy to burn, the film forming time is long, up to 10-15 minutes, and the negative temperature coefficient is formed, that is, this With the increase of temperature, the resistance value of this kind of coating gradually decreases, which reduces the service life, is easy to attenuate, and has poor stability. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B3/40B05D7/00B05D3/02
Inventor 刘占友
Owner 佛山康疆电器科技有限公司
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