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Reproducing method for forming die and method for making optical element

A technology for forming molds and manufacturing methods, applied in optical components, household appliances, manufacturing tools, etc., can solve problems such as unusable molds, and achieve the effect of not spending time and cost

Inactive Publication Date: 2006-09-20
HOYA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Molds use expensive materials that form the molding surface by precision machining of special material base metals, but if the above-mentioned damage occurs, the mold will no longer be usable

Method used

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  • Reproducing method for forming die and method for making optical element
  • Reproducing method for forming die and method for making optical element
  • Reproducing method for forming die and method for making optical element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] figure 1 An embodiment of an example of the mold for molding an optical element of the present invention is illustrated. figure 1 Among them, 1 is the mold base material, and 2 is a carbon-based film (release film) provided on the forming surface for forming the glass material.

[0060] First, a mold for molding an optical element will be described in detail. As the mold base material, a polycrystalline SiC formed surface produced by CVD was mirror-polished to Rmax=18 nm (roughness measurement was performed by AFM). After the mold was well cleaned, a DLC:H film was formed on the forming surface using an ion plating film forming device. As a result of analysis in the depth direction by ESCA, the thickness of the surface DLC:H film was 80 nm. As a result of microscopic Raman analysis, it was confirmed that the middle distance order (Japanese: middle distance order) between the disordered (Disordered) atomic group and the graphite (Graphite) atomic group was generated a...

Embodiment 2～6

[0073] According to Tables 1 and 2, in addition to changing the mold base material, carbon series film, release film film forming method, film thickness of the release film, optical glass, pressing conditions, cleaning before plasma treatment, and gas for etching treatment, the rest In the same manner as in Example 1, the regeneration process was repeated 100 times. According to the table, on the molding surface of the molding die, the substantial surface deterioration and the reduction in the film-forming force of the carbonaceous release film are very slight, and it is not considered that there is a problem in the appearance quality of the molded product.

Embodiment 2

[0075] Embodiment 2: outer diameter is 10mmΦ, and central wall thickness is 0.5mm, and the concave lens that コバ thick is 1.5mm;

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Abstract

Disclosed is a method of regenerating a pressing mold comprising removal of a carbon-based film from a pressing mold having the film on a molding surface thereof. The removal of the film is performed by etching with plasma of a hydrogen-based gas or treatment with UV ozone. Disclosed is a method of manufacturing an optical glass element comprising press molding of a heat-softened glass material in a pressing mold having a carbon-based film on a molding surface thereof. The pressing mold is that has been regenerated by removing a carbon-based film on the pressing mold having the film on the molding surface thereof by hydrogen gas plasma etching or UV ozone treatment, after which a carbon-based film has been formed on the molding surfaces from which the film has been removed. Provide is a method of regeneration that removes the carbon-based film on the molding surface of the base material of a pressing mold without damaging the surface of the base material of the pressing mold and that can reliably remove carbon-based films at reduced cost and in less time. Provide is a method of manufacturing optical glass elements employing a pressing mold that has been regenerated by this method.

Description

technical field [0001] The present invention relates to molds for molding optical elements used for press-molding glass materials to produce glass optical elements such as lenses and prisms, which are suitable for removing a certain film on the molding surface when it is degraded, A method for regenerating a molding mold for regeneration, and a method for manufacturing a glass optical element using the molding mold regenerated by the method. Background technique [0002] In the molding die for press molding of glass optical elements, it is known that a carbon-based film is provided on the molding surface as a release film (Japanese: release film). [0003] The release film prevents thermal sticking of sand and maintains the mirror surface of the precision-processed molding surface when the glass is closely attached to the molding surface at high temperature during pressing, and when the glass is stretched at high temperature, it It is extremely usef...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B11/00C03B11/06C03B11/08B29C33/56B29C33/70
CPCC03B2215/03B29C33/56C03B2215/24C03B11/086B29C33/70B29L2011/00
Inventor 近江成明
Owner HOYA CORP
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