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Method for processing preformed pieces before precise mold pressing

A preformed and precise technology, applied in the field of precision molding of low-melting glass, can solve the problems of insignificant effect, poor uniformity and quality, complicated coating process, etc., and achieves good improvement effect, good uniformity and quality, chemical simple method effect

Inactive Publication Date: 2013-03-20
SCHOTT GLASS TECH (SUZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process of physical method coating is more complicated, the cost is higher, and the uniformity and quality of the film are poor, so the effect is not very significant

Method used

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  • Method for processing preformed pieces before precise mold pressing
  • Method for processing preformed pieces before precise mold pressing
  • Method for processing preformed pieces before precise mold pressing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] SiO Plating by Magnetron Sputtering and Sol-gel Method 2 Effect of Film on Acid Resistance, Alkali Resistance and Weather Resistance of Phosphate Glass Ball Lenses

[0023] A phosphate glass (P-PK53, SCHOTT) ball lens with a diameter of 4.00mm was selected, and SiO was coated on the surface by magnetron sputtering and Sol-gel method respectively. 2 membrane. SiO plating by magnetron sputtering 2 The film was carried out on a TXZ500-2 type radio frequency magnetron sputtering coating machine, the target material was single crystal silicon in the (111) direction, the sputtering atmosphere was argon with a purity of 99.9%, and the reactive gas was 99.9% oxygen. The distance of the ball lens is 60mm. Phosphate glass ball lenses were first cleaned with deionized water, acetone and alcohol in an ultrasonic cleaner for 20 minutes each, and immediately put into the coating chamber after drying. The coating chamber is evacuated to 1.0×10 -3 Pa, the sputtering pressure is 1....

Embodiment 2

[0036] al 2 o 3 Effect of Coating on Weatherability of Phosphate Phosphate Glass Ball Lenses

[0037] Choose thiophosphate glass with a diameter of 4.00mm (P 2 o 5 -SO 3 -ZnO) ball lens, coated with Al on its surface by Sol-gel method 2 o 3 coating. Specific steps are as follows:

[0038] (1) Aluminum isopropoxide (Shenyang Chemical Reagent Company) was selected as the precursor. Heat 200ml of distilled water to 50°C, and slowly add 20g of finely ground aluminum isopropoxide while stirring at constant temperature. After the addition, reflux and stir for 2.5h to form a precipitate. Then heat up to 80°C, add a certain amount of peptizer (0.1mol / L nitric acid solution) to redisperse the precipitate, and finally reflux and stir at 80°C for 30 minutes to obtain a stable and transparent Al 2 o 3 Sol spare.

[0039] (2) Place the phosphorothioate glass ball lens on commercially available ordinary filter paper, and then Al 2 o 3 The sol was evenly poured onto the ball len...

Embodiment 3

[0045] al 2 o 3 Effect of Coating on Weatherability of Silicate Glass Ball Lens

[0046] Select a silicate glass (P-SK57, SCHOTT) ball lens with a diameter of 4.00mm, and also use the Sol-gel method to plate Al on its surface 2 o 3 Coating, concrete steps are as embodiment 2. will be plated with Al 2 o 3 coated and without Al 2 o 3 Coated silicate glass ball lenses were molded under the same molding conditions (2%H 2 +98%N 2 In the atmosphere, the molding temperature is 540°C and the pressure is 250kg / cm 2 , pressurization time 30 seconds) lower molding into finished product, and carry out weather resistance test, test method is the same as embodiment 1.

[0047] Figure 5 It is a micrograph of the surface of the silicate glass sample observed under an optical microscope after the weather resistance test. from Figure 5 It can be seen from (a) that without Al 2 o 3 The surface of the coated silicate glass ball lens sample showed obvious large foggy mildew spots;...

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Abstract

The invention discloses a method for processing preformed pieces before precise mold pressing, which is characterized by forming a protecting layer on the surface of a preformed piece by a chemical coating method. The method not only can improve the weather resistance, acid resistance and alkali resistance of mold pressed products, but also can prevent the preformed pieces from being bonded with a precise compression mold, thus the service life of the mold is prolonged.

Description

technical field [0001] Generally, the present invention relates to precision molding of low-melting point glass, in particular, the present invention relates to a method for treating a preform before precision molding, and more particularly, the present invention relates to forming a protective layer on the surface of a preform using an electroless coating method . Background technique [0002] Optical glass lens molding technology is a high-precision optical element processing technology. It puts low-melting glass into a high-precision mold, and under the conditions of heating, pressure and oxygen-free, it is directly molded at one time. Use the required optical components. Precision molding technology has been successfully developed for more than 20 years since the mid-1980s, and now it has become one of the most advanced optical parts manufacturing technologies in the world. In many countries, it has entered the production and practical stage, and the popularization and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/00C03C17/23C03C17/245
Inventor 张广军乔斯·西默
Owner SCHOTT GLASS TECH (SUZHOU) CO LTD
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