Glass silica gel Fresnel lens and manufacture method thereof

A technology of Fresnel lens and manufacturing method, which is applied in the direction of lens, optics, instruments, etc., can solve the problems of secondary foaming, difficulty in effectively removing air bubbles, and affecting the light-gathering effect of Fresnel lens, so as to improve production efficiency , The effect of shortening the curing time

Inactive Publication Date: 2012-08-22
广东金天阳光电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its shortcoming is that in the natural compounding method, it is difficult to effectively remove air bubbles when compounding in the air. In addition, when the silica gel is still softened or even in a flowable state, compounding by rolling method is very easy to cause Fresnel lens The shape of the lens is affected, which affects the light-gathering effect of the Fresnel lens after molding; in the vacuum composite method, air is introduced after vacuuming and defoaming. During the curing process of air, the gap between the glass substrate and the lens mold is extremely easy. The phenomenon of secondary foaming does not solve the technical problem that there are no bubbles in the formed glass-silicone Fresnel lens. The existence of bubbles will affect the light-gathering effect of the Fresnel lens.

Method used

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  • Glass silica gel Fresnel lens and manufacture method thereof
  • Glass silica gel Fresnel lens and manufacture method thereof
  • Glass silica gel Fresnel lens and manufacture method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] [Example 1] The process flow of the glass silica gel Fresnel lens manufacturing method is as follows: figure 2 As shown, first the adhesive is evenly coated on the tempered ultra-clear glass 1, and the release agent is evenly coated on the Fresnel lens mold 3; then use silica gel 2 (in this embodiment, the silica gel 2 has a transparency of 92 % more than pure silica gel) evenly spread on the Fresnel lens mold 3; before vacuuming, leave a certain volume of vacuum cavity 5 between the tempered ultra-clear glass 1 and the Fresnel lens mold 3, such as image 3 Shown; Start to vacuumize afterwards, when the degree of vacuum is 0.05Pa, the tempered ultra-clear glass 1 and the Fresnel lens mold 3 will be molded together, the mold clamping pressure is 50 kg / cm2, and the temperature will be lowered after the mold clamping. Heating to 90°C for curing; after curing for 24 minutes under the condition that the vacuum degree, clamping pressure and heating temperature are kept c...

Embodiment 2

[0022] [Example 2] The process flow of the glass silica gel Fresnel lens manufacturing method is as follows: as figure 2 As shown, first the adhesive is evenly coated on the tempered ultra-clear glass 1, and the release agent is evenly coated on the Fresnel lens mold 3; then use silica gel 2 (in this embodiment, the silica gel 2 has a transparency of 92 % more than pure silica gel) evenly spread on the Fresnel lens mold 3; before vacuuming, leave a certain volume of vacuum cavity 5 between the tempered ultra-clear glass 1 and the Fresnel lens mold 3, such as image 3 Shown; Start to vacuumize afterwards, when the degree of vacuum is 0.06Pa, the toughened ultra-white glass 1 and the Fresnel lens mold 3 are molded together, the mold clamping pressure is 100 kg / cm2, and the temperature is adjusted after the mold clamping. Heating to 96°C for curing; after curing for 22 minutes in an environment where the vacuum degree, clamping pressure and heating temperature are kept constant,...

Embodiment 3

[0023] [Example 3] The process flow of the glass silica gel Fresnel lens manufacturing method is as follows: as figure 2 As shown, first the adhesive is evenly coated on the tempered ultra-clear glass 1, and the release agent is evenly coated on the Fresnel lens mold 3; then use silica gel 2 (in this embodiment, the silica gel 2 has a transparency of 92 % more than pure silica gel) evenly spread on the Fresnel lens mold 3; before vacuuming, leave a certain volume of vacuum cavity 5 between the tempered ultra-clear glass 1 and the Fresnel lens mold 3, such as image 3 Shown; Start to vacuumize afterwards, when the degree of vacuum is 0.08Pa, the tempered ultra-clear glass 1 and the Fresnel lens mold 3 will be molded together, the mold clamping pressure is 200 kg / cm2, and the temperature will be lowered after the mold clamping. Heating to 100°C for curing; after curing for 20 minutes in an environment where the vacuum degree, clamping pressure and heating temperature are kept c...

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Abstract

The invention discloses a glass silica gel Fresnel lens and a manufacture method thereof, which resolve the problem that the existing glass silica gel Fresnel lens has bubbles. The glass silica gel Fresnel lens is formed by fixedly bonding a bubble-free silica gel Fresnel lens layer (4) to tempering super white glass (1). The manufacture method includes utilizing the tempering super white glass (1) as a base material, conducting mould assembly on the tempering super white glass (1) and a Fresnel lens mould (3) evenly and smoothly coated with silica gel (2) when vacuum degree is 0.05-0.08Pa after vacuumizing processing, enabling mould assembly pressure to be 50-200kilogram / cm<2>, heating the mould after mould assembly, enabling the temperature to be 90-100 DEG C, conducting solidification for certain time with the vacuum degree, the mould assembly pressure and the heating temperature unchanged, enabling the bubble-free silica gel Fresnel lens layer (4) to be fixedly bonded to the tempering super white glass (1) and then conducting air discharge, decompression, mould moving and demoulding to obtain the glass silica gel Fresnel lens.

Description

technical field [0001] The invention relates to a solar concentrating device and a manufacturing method thereof, in particular to a glass-silica gel Fresnel lens and a manufacturing method thereof. Background technique [0002] As a major clean energy source, solar energy has been paid more and more attention. The use of concentrating mirrors can increase the energy density of the sun irradiated on the unit area, and the Fresnel lens as a refracting concentrator can obviously improve the utilization rate of solar energy; the structure of the glass-based organic silicon composite Fresnel lens is firmly bonded by the silicone Fresnel lens On the glass, this structure has strong stability and is not easy to affect its quality due to thermal expansion and contraction, so it has the advantages of good outdoor weather resistance and long service life. However, due to the limitations of the existing manufacturing process, the produced glass-based silicone composite Fresnel lenses...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B3/08B29C51/10
Inventor 俞文生黄安防
Owner 广东金天阳光电有限公司
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