TW201322305A - Ceramic arc lamp tube and manufacturing method thereof - Google Patents

Abstract

The present invention provides a ceramic arc lamp tube and its manufacturing method, in which a ceramic composite material, which contains high-temperature resistant oxide, nitride, carbide, and mixture thereof, is subjected injection or casting for molding into a wick; then two wicks are connected and subjected to a low-temperature laser welding to form a lamp tube preform; and finally high temperature sintering is performed to oxidize the wicks made by the ceramic composite material, further obtaining a ceramic arc lamp tube. Alternatively the wicks can be directly welded by high power laser. Therefore, when the ceramic arc lamp tube is used in the arc discharge lamp, a better heat resistance can be obtained to extend the service life of the lamp.

Description

Ceramic arc lamp and manufacturing method thereof

The invention relates to a ceramic arc lamp and a manufacturing method thereof, in particular to a ceramic arc lamp applied to an arc discharge lamp, wherein the ceramic system comprises a high temperature resistant oxide, a nitride, a carbide and various materials thereof. Mixed composite.

Arc discharge lamps are usually used in places with high illumination. Most of the arc discharge lamps are mainly provided with a ceramic tube inside, and a filament for arc discharge is arranged inside the ceramic tube, and the ceramic tube is pumped. After vacuuming, a special discharge element or alloy is accommodated.

Therefore, when the arc discharge lamp is energized, the power source is conducted to the filament to effect the excitation at both ends, thereby achieving the effect of illuminating.

However, when the arc discharge lamp is emitting light, a relatively high temperature is generated. Although the glass tube generally has a relatively good heat resistance, the temperature generated by the arc discharge lamp is too high, and the glass tube is easily burnt. , resulting in a general glass lamp does not last long.

Of course, in order to improve the above problems, the most common practice now is to add a metal material to the ceramic material during the manufacturing process of the ceramic lamp tube, thereby improving the heat dissipation effect of the ceramic lamp tube. However, the addition of a metal material to a ceramic material can enhance the heat dissipation effect of the ceramic tube, but its effect is limited, and the life of the ceramic tube cannot be effectively extended.

Accordingly, in order to improve the above various problems, the inventors of the present invention have finally developed the high temperature resistant light-transmitting ceramic arc lamp of the present invention through years of accumulated experience.

The main object of the present invention is to provide a ceramic arc lamp having a heat resistant effect.

In order to achieve the above object, the present invention mainly forms a wick by injection molding with a ceramic composite material covered with a mixture of high temperature resistant oxides, nitrides, carbides and various materials, and then connects the two wicks in abutting manner. The low temperature laser welding is used to form a lamp blank, and finally the wick of the ceramic composite material is oxidized by high temperature sintering to obtain a ceramic arc lamp.

Thereby, when the ceramic arc lamp is used on an arc discharge lamp, a better heat resistance effect can be obtained, thereby prolonging the life of the lamp.

The features, advantages, and similar expressions of the present invention are not intended to limit the scope of the present invention. Rather, the specific features, advantages, or characteristics described in connection with the specific embodiments are included in at least one embodiment of the invention. Therefore, the description of features and advantages, and similar expressions in this specification are related to the same specific embodiments, but are not essential.

These features and advantages of the present invention will become more apparent from the following description and the appended claims.

The invention relates to a ceramic arc lamp and a manufacturing method thereof, in particular to a ceramic arc lamp applied to an arc discharge lamp. The invention is illustrated by the following description of the preferred embodiments of the invention, and is not intended to limit the invention. The contents of this preferred embodiment are detailed below.

Please refer to the first figure for the manufacturing flow chart of the present invention. The manufacturing method of the ceramic arc lamp of the invention comprises the following steps:

1. Forming S1: A ceramic composite material having a heat distortion temperature higher than 200 degrees C is formed into a wick 10 by injection or by injection molding.

The ceramic composite material refers to a ceramic composite material covered with a mixture of high temperature resistant oxides, nitrides, carbides, and various materials thereof.

Please also refer to the second figure, which is a schematic view of the wick of the present invention. As shown in the figure, the wick 10 of the present invention comprises a connecting portion 11 and a tube portion 12, the central portion of the connecting portion 11 is a hollow recess portion 13, and a peripheral portion of the front end of the connecting portion 11 is formed with a sintered portion 14; The portion 12 is provided at the rear end of the connecting portion 11, and a hollow duct 15 is formed in the center, and the hollow duct 15 is penetrated through the tube portion 12 and communicates with the hollow recess portion 13 of the connecting portion 11.

Second, the low temperature laser welding S2: the two wicks 10 are placed in a mold in a butt joint manner, and then the two corresponding wicks 10 are welded by a low temperature laser to form a tube blank embryo 20; in this embodiment, The temperature of low temperature laser welding is below 600 °C.

Please also refer to the third figure, which is a schematic diagram of the bulb blank of the present invention. As shown in the figure, the lamp blank 20 is mainly formed by welding two wicks 10 in abutting manner, and a hollow pipe is formed inside.

3. High-temperature sintering S3: The lamp blank 20 is sintered by high-temperature sintering or the two cores 10 are directly welded by high-power laser, so that the center of the lamp blank 20 is oxidized by the wick 10 formed of the polymer material, thereby obtaining In the hollow ceramic arc tube, the high temperature sintering temperature in the present invention is 1600 degrees C.

Please also refer to the fourth figure, which is a schematic view of the lamp blank before the sintering of the lamp. As shown in the figure, before the tube blanks 20 are sintered, the two tube blanks 20 are firstly connected to each other, that is, the connecting portions 11 of the two tube blanks 20 are corresponding to each other, so that the front ends of the two connecting portions 11 are sintered. The portions 14 are joined to each other. Since the hollow portions 13 are formed in the center of the two connecting portions 11, when the two connecting portions 11 are sintered by high temperature to form a ceramic arc tube, a chamber is formed inside the ceramic arc tube.

Thus, when the ceramic arc tube of the present invention is applied to an arc discharge lamp, the filament can be fixed inside the chamber of the ceramic arc tube, and the inside of the ceramic arc tube is evacuated, thereby being transmitted through the ceramic composite material. The wick 10 is oxidized to conduct heat. Since the ceramic composite aluminum material has better heat conduction effect, the purpose of improving the heat dissipation effect can be effectively achieved.

The features and spirit of the present invention are more clearly described in the above detailed description of the preferred embodiments, and the scope of the present invention is not limited by the preferred embodiments disclosed herein. On the contrary, it is intended to cover all kinds of changes and equivalences within the scope of the patent application to which the present invention is intended.

S1. . . forming

S2. . . Low temperature laser welding

S3. . . High temperature sintering

10. . . Wick

11. . . Connection

12. . . Tube department

13. . . Hollow recess

14. . . Sintering department

15. . . Hollow pipe

20. . . Lamp coarse embryo

The first figure is a manufacturing flow chart of the present invention.

The second figure is a schematic view of the wick of the present invention.

The third figure is a schematic cross-sectional view of the lamp blank of the present invention.

The fourth figure is a schematic view of the lamp blank before the sintering of the lamp.

S1. . . forming

S2. . . Low temperature laser welding

S3. . . High temperature sintering

Claims (10)

The manufacturing method of the ceramic arc lamp comprises the following steps: (1) injection molding: forming a wick by injection molding, and (2) low temperature laser welding: using two wicks in a docking manner, using low temperature The laser is welded to form a bulb rough embryo; and (3) high temperature sintering: the bulb blank is subjected to high temperature sintering to oxidize the ceramic composite material of the bulb rough embryo, thereby obtaining a hollow Ceramic arc tube. The method of manufacturing a ceramic arc lamp according to claim 1, wherein the ceramic composite material is injection molded at a temperature higher than 200 ° C. The method for manufacturing a ceramic arc lamp according to the above or the second aspect of the invention, wherein the low temperature laser temperature is 600 degrees C or less. The method for manufacturing a ceramic arc lamp according to claim 1, wherein the high temperature sintering temperature is 1600 degrees C. A ceramic arc lamp is formed by sintering two wicks in a butt joint manner, wherein: each wick is injection molded by a ceramic composite material, and comprises a connecting portion and a tube portion, wherein the connecting portion is hollow at the center The concave portion has a sintered portion formed on a peripheral surface of the front end; the tube portion is disposed at a rear end of the connecting portion, and has a hollow pipe penetrating the pipe portion and communicating with the hollow concave portion of the connecting portion. The ceramic arc lamp of claim 5, wherein the sintered portion of each of the wicks comprises at least one protrusion protruding from a peripheral edge of the front end and at least one recess recessed from a peripheral surface of the front end . The ceramic arc lamp of claim 6, wherein the protruding portion of each of the wicks is disposed opposite to the recess. The manufacturing method of the ceramic arc lamp comprises the following steps: (1) grouting molding: forming a wick by grouting the ceramic composite material; (2) laser welding: directly connecting the two wicks in a direct connection manner Soldering with a high power laser to obtain a hollow ceramic arc tube. The method for manufacturing a ceramic arc lamp according to claim 1, wherein the ceramic composite material is covered with a high temperature resistant oxide, a nitride, a carbide, and each of the same. Ceramic composite material mixed with materials. The ceramic arc lamp of claim 5, wherein the ceramic composite material is a ceramic composite material covered with a mixture of high temperature resistant oxides, nitrides, carbides, and various materials thereof.