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Method for sealing xenon lamp outer tube of automobile by fusing

A xenon lamp and outer tube technology, applied in the manufacture of discharge tubes/lamps, electrical components, glass molding, etc., can solve problems affecting the appearance of the bulb, affecting the conductivity of the molybdenum rod, affecting the service life of the bulb, etc., to achieve protection performance Effect

Inactive Publication Date: 2009-06-24
应园
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, during the fusion sealing process of the quartz outer tube of the xenon lamp for vehicles, the molybdenum rod of the electrode often reacts with the oxygen in the air due to the high-temperature flame burning of the fusion seal to form molybdenum oxide, which is generally black. , blue, etc., seriously affect the appearance of the bulb, and even affect the conductivity of the molybdenum rod, and ultimately affect the service life of the bulb

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] A method for fusing the outer tube of a xenon lamp for a vehicle. A quartz discharge tube is placed inside the quartz outer tube, and the quartz discharge tube and the quartz outer tube are heated at the fusion portion to perform fusion sealing (that is, the quartz discharge tube and the quartz outer tube The tube is melted at the fusion portion and fused into one body), the heating steps are the same as the existing fusion sealing method, and will not be described again. When heating, pass a mixed gas into the gap between the quartz discharge tube and the outer quartz tube, the mixed gas is composed of argon and hydrogen, wherein the mass percentage of argon is 70%, and the mass percentage of hydrogen is 30% . When the mixed gas is fed into the gap between the quartz discharge tube and the quartz outer tube, the flow rate is 6ml / s.

Embodiment 2

[0011] A method for fusing the outer tube of a xenon lamp for a vehicle. A quartz discharge tube is placed inside the quartz outer tube, and the quartz discharge tube and the quartz outer tube are heated at the fusion portion to perform fusion sealing (that is, the quartz discharge tube and the quartz outer tube The tube is melted at the fusion portion and fused into one body), the heating steps are the same as the existing fusion sealing method, and will not be described again. When heating, pass a mixed gas into the gap between the quartz discharge tube and the outer quartz tube, the mixed gas is composed of argon and hydrogen, wherein the mass percentage of argon is 80%, and the mass percentage of hydrogen is 20% . When the mixed gas is introduced into the gap between the quartz discharge tube and the quartz outer tube, the flow rate is 5ml / s.

Embodiment 3

[0013] A method for fusing the outer tube of a xenon lamp for a vehicle. A quartz discharge tube is placed inside the quartz outer tube, and the quartz discharge tube and the quartz outer tube are heated at the fusion portion to perform fusion sealing (that is, the quartz discharge tube and the quartz outer tube The tube is melted at the fusion portion and fused into one body), the heating steps are the same as the existing fusion sealing method, and will not be described again. When heating, pass a mixed gas into the gap between the quartz discharge tube and the outer quartz tube, the mixed gas is composed of argon and hydrogen, wherein the mass percentage of argon is 90%, and the mass percentage of hydrogen is 10% . When the mixed gas is fed into the gap between the quartz discharge tube and the quartz outer tube, the flow rate is 8ml / s.

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PUM

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Abstract

A vehicle-use xenon lamp outer tube melt-sealing method comprises the following steps: a quartz discharge tube is sleeved in a quartz outer tube; the quartz discharge tube and the quartz outer tube are headed in a melting part so as to carry out melt-sealing; during the heating, mixed gases are fed into the space between the quartz discharge tube and the quartz outer tube; the mixed gases comprise argon gas and hydrogen, wherein, the mass percentage of argon is 70%-90%, while the mass percentage of hydrogen is 10%-30%. During the heating, the mixed gases are fed into the space between the quartz discharge tube and the quartz outer tube; as argon gas has the protective effect due to the inactive nature; and argon gas does not react with the quartz tubes and molybdenum at high temperatures. If the protective force of argon is not enough, once the molybdenum rods are oxidated, hydrogen has the function of reduction at high temperature and can effectively deoxidize the oxidated molybdenum, so as to effectively protect the original performances of the molybdenum rods.

Description

(1) Technical field [0001] The invention relates to a method for fusing and sealing the outer tube of a xenon lamp for vehicles. (2) Background technology [0002] The xenon lamp for vehicles includes a quartz discharge tube and a quartz outer tube. The quartz discharge tube is equipped with an electrode, and the electrode is composed of a thoriated tungsten electrode, a molybdenum sheet and a molybdenum rod. The quartz discharge tube is set in the quartz outer tube, and the quartz discharge tube and the quartz outer tube are heated at the fusion part, so that the quartz discharge tube and the quartz outer tube are melted at the fusion part and fused into one body to complete the fusion seal. At present, during the fusion sealing process of the quartz outer tube of the xenon lamp for vehicles, the molybdenum rod of the electrode often reacts with the oxygen in the air due to the high-temperature flame burning of the fusion seal to form molybdenum oxide, which is generally bl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J9/00H01J9/26H01J9/395C03B23/217
Inventor 佘根富魏兆军张德武
Owner 应园