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Processing method for strip Fresnel lens

A Fresnel lens and processing method technology, applied to other household appliances, optical components, household appliances, etc., can solve the problems of high cost, low quality accuracy, easy to produce scattering, etc., and achieve cost reduction, simple process, and fast speed. Effect

Inactive Publication Date: 2012-02-22
南京中聚新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This existing production method is discontinuous, so the output is low and the cost is high; and the R fillet formed by the tooth tip of the Fresnel lens processed by the existing method is prone to scattering and has low quality accuracy; and the surface finish Poor, the finish is generally in the Below 10, the light transmittance is difficult to guarantee

Method used

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  • Processing method for strip Fresnel lens
  • Processing method for strip Fresnel lens
  • Processing method for strip Fresnel lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Take 500kg of transparent and anti-aging PVC resin, put it into the kneader and knead it for about 30 minutes, transfer it to the internal mixer for plasticization for 10 minutes, and then enter the feeder for plasticization and filtration.

[0024] 2. The basic plasticized plastic is rolled and formed in a hot roller.

[0025] The material enters a four-roller calender and is calendered into sheets, and the linear speed of the calender rollers of the calender is 120m / min.

[0026] 3. The calendered sheet is pressed with a Fresnel pattern roller and a smooth roller, and is cooled while pressing, so that the temperature of the Fresnel pattern sheet is cooled to about 50°C. Excessive cooling (less than 30°C), water droplets will appear on the surface of Fresnel toothed roller and smooth roller, which will also affect product quality; the line speed of Fresnel toothed roller and smooth roller is 200m / min, and the Fresnel toothed roller The linear speed of the roller an...

Embodiment 2

[0040] 1. Take 500kg of transparent, anti-aging and anti-ultraviolet PET, and add it into a twin-screw extruder to extrude and plasticize.

[0041] 2. The basic plasticized plastic is rolled and formed in a hot roller.

[0042] Then the material enters a four-roller calender and is calendered into sheets, and the linear speed of the calender rolls of the calender is 175m / min.

[0043] 3. The calendered sheet is pressed by the Fresnel toothed roller and the smooth roller, and cooled while pressing, so that the temperature of the Fresnel pattern sheet is cooled to about 45°C; if the cooling is excessive, the Fresnel toothed roller and the smooth roller The appearance of water droplets on the surface of the roller will also affect the product quality; the linear speed of the Fresnel toothed roller and the smooth roller is 250m / min, and the linear speed of the Fresnel toothed roller and the smooth roller should not be too large, otherwise cold stretching will occur. The internal ...

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Abstract

The present invention discloses a processing method for a strip Fresnel lens. The method comprises the following steps: plasticizing resin; adding the plasticized material into a calender to carry out calendering into sheets; rolling the calendered sheets by a Fresnel insection roller and a smooth roller to press out Fresnel insection, and synchronously cooling; eliminate internal stress; after cooling, relaxed placing the Fresnel hard sheets to eliminate the internal stress; cutting and packaging. According to the present invention, the heating roller, the treatments of heating and calendaring are adopted, the Fresnel insection roller is adopted to carry out extruding and forming, the threading method is adopted to cool and shape the front side and the back side of the hardware; the process of the invention has characteristics of simpleness, rapidness and high yield, wherein the yield of the present invention is increased by thousands of times compared to the yield produced by the original molding method; the cost is substantially reduced, wherein the cost can be reduced by hundreds of times; the quality precision, ie., the cusp angle of the refraction angle of the Fresnel lens, is ensured, such that the case of the scattering is not generated; the finish can achieve more than 10.

Description

technical field [0001] The invention relates to a processing method of a strip Fresnel lens. Background technique [0002] The known processing and molding process of Fresnel lens adopts molding, injection molding or casting method. This existing production method is discontinuous, so the output is low and the cost is high; and the R fillet formed by the tooth tip of the Fresnel lens processed by the existing method is prone to scattering and has low quality accuracy; and the surface finish Poor, the finish is generally in the Below 10, the light transmittance is difficult to guarantee. Contents of the invention [0003] Purpose of the invention: The purpose of the present invention is to overcome the deficiencies of the prior art, and to provide a continuous production, high output, and low-cost Fresnel lens processing and molding process. [0004] In order to solve the problems of the technologies described above, the present invention adopts the following technical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C69/02B29C43/24B29C59/04B29L11/00
Inventor 黄振兴方韦方声祥
Owner 南京中聚新型材料有限公司
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