Small-sized tubular mercury-releasing getter elements and processing method thereof

A processing method and mercury release technology, which is applied in the manufacture of electrical components, gas discharge lamp parts, discharge tubes/lamps, etc., can solve problems such as easy powder falling off, weakened ability to transmit pressure, uneven powder filling density, etc. , to achieve the effects of simple processing, increased filling density, and improved pass rate

Inactive Publication Date: 2010-04-21
南京泰欧科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The rolling shutter compression method is to wrap a certain amount of powder with a metal sheet into a set geometric shape, directly form a mercury release and suction element, or wrap it into a strip with a specific size section, and cut the appropriate length according to the product requirements. Products made in this way often have a slit or opening, and the powder filling density is uneven, especially the powder at the slit or opening is easy to fall off
The powder filling stamping method generally prepares a small metal tube that meets the target product specification requirements, then fills a quantitative amount of mercury-releasing and inhaling powder into the small metal tube, and finally inserts the pressing needle from the upper and lower ends of the metal tube to the mercury-releasing and inhaling powder. Stamping, but it has a big defect: when the diameter required by the product specification is less than 2.0mm, the difficulty of pressing the needle will increase, and the ability to transmit pressure will also be weakened, which will lead to the release of mercury inhalation powder After being stamped, the expected effect cannot be achieved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A processing method for a small tubular mercury release and suction element with a pipe diameter of 1.50 mm.

[0015] Choose a pipe with a diameter of 2.30mm and a wall thickness of 0.133mm, fill the lumen with mercury-releasing and inhaling mixed powder, and stretch the metal sleeve 13 times to make the diameter of the metal sleeve 1.62mm, and the mixed powder in the lumen Density up to 4.5mg / mm 3 ; Then through two sets of paired moulds, the tube wall is extruded from the opposite direction to the center respectively. The extrusion directions of the two sets of paired dies are orthogonal to the product. After extrusion, the diameter of the metal casing reaches 1.5mm. The filling density of the mixed powder in the lumen reaches 4.7~5.4mg / mm 3 ; Then, according to the product design specifications, cut into small sections of equal length to form a small tubular mercury release and suction element. In the small tubular mercury release and suction element, the length of...

Embodiment 2

[0019] The method of measuring and calculating the filling density ρ of the mixed powder in the tube cavity (taking the most common circular tubular small-scale mercury release and suction element as an example)

[0020] 1. Calculation formula

[0021] ρ=M 2 / (0.25πd 2 L-εM 1 )

[0022] In the formula:

[0023] d: Outer diameter of the measured mercury release and inhalation element;

[0024] L: the overall length of the measured mercury-releasing aspirating element;

[0025] M: weight of the mercury release and getter element;

[0026] m 1 : the weight of the metal case;

[0027] m 2 : powder filling amount;

[0028] ε: material coefficient (pure iron material, ε = 0.128; pure nickel material, ε = 0.114).

[0029] 2. Measurement method

[0030] Use a micrometer to measure the outer diameter in the vertical and horizontal directions of the cross-section of the tested tubular mercury release and suction element, and calculate the average value as the outer diameter ...

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Abstract

The invention relates to a small-sized tubular mercury-releasing getter elements and a processing method thereof. A mercury-releasing getter element consist of a metal sleeve pipe and mixed powder containing mercury-releasing powder and getter powder in a pipe cavity, wherein the pack density of the mixed powder in the pipe cavity is 4.7 to 5.4mg / mm3. During processing, the metal sleeve pipe filled with the mixed powder is subjected to 10 to 20 times of variable-diameter stretching in order to make the pipe diameter of the metal sleeve pipe 1.07 to 1.08 times that of a target product and the density of the mixed powder in the pipe cavity reach a stretching processing limit density of 4.5 to 4.6mg / mm3, then the pipe walls are squeezed toward the center by paired dies in order to make the pipe diameter of the metal sleeve pipe reach that of the target product and the density of the mixed powder in the pipe cavity reach 4.5 to 5.4mg / mm3, and finally, according to product specifications, the metal sleeve pipe is cut into small sections with the same length to form the small-sized tubular mercury-releasing getter elements.

Description

technical field [0001] The invention relates to a mercury release and suction element and a processing method thereof, in particular to a metal sleeve whose inner diameter is less than 2.0 mm, and the filling density of mercury release and suction powder in the tube cavity is 4.7 to 5.2 mg / mm 3 A small mercury release and getter element and its processing method. Background technique [0002] Mercury release and suction components are necessary components for the production of fluorescent lamps, high-pressure mercury lamps, gas discharge displays, mercury brake tubes and other products. The quality of mercury release and suction components directly affects the quality of corresponding products. At present, mercury release and suction components, especially It is a small tubular mercury release and inhalation element, and the filling density of mercury release and inhalation powder is generally only 4.5-4.6mg / mm 3 the following. Due to the low filling density, in the proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J61/24H01J9/00
Inventor 徐新
Owner 南京泰欧科技开发有限公司
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