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Material for prototype aluminum mold for stamper, prototype aluminum mold for stamper, and stamper

一种原材料、母模的技术，应用在压模用铝母模用原材料、压模用铝母模和压模领域，能够解决视觉不能识别、妨碍反射光吸收或散射、反射光吸收或散射散乱等问题

Active Publication Date: 2012-07-18
NIPPON LIGHT METAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since this defect becomes unevenness of the transferred material of the stamper, it prevents the absorption or scattering of reflected light, so it is not preferable.
On the other hand, even if minute particles smaller than the wavelength of visible light of the "second phase particles" exist on the surface, they constitute the cause of defects during anodized aluminum coating treatment
When the defects exist continuously or intermittently at intervals equal to or less than the wavelength of visible light, the same problem as above occurs, so it is not preferable.
In addition, when the second phase particles have an equivalent diameter below the wavelength of visible light and are scattered on the surface at an adjacent distance above the equivalent diameter, defects during the anodic aluminum oxide coating process will also occur.
However, the scattering of absorption or scattering of reflected light caused by them cannot be recognized by human vision

Method used

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  • Material for prototype aluminum mold for stamper, prototype aluminum mold for stamper, and stamper
  • Material for prototype aluminum mold for stamper, prototype aluminum mold for stamper, and stamper
  • Material for prototype aluminum mold for stamper, prototype aluminum mold for stamper, and stamper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0237] Example 1: 1.04% by mass of Mg was added to aluminum with a purity of 99.995% by mass and melted. The melt was cast into an ingot with a length of 3850 mm in a DC casting mold with a thickness of 508 mm and a width of 1110 mm at a casting temperature of 680° C., a casting speed of 52 mm / min, and a cooling water volume of 230 L / min per 1 m of mold length.

[0238] In this casting, a micronizing agent (Al-Ti-B) is continuously added to the melt flowing into the mold so that the concentration of Ti increases by 8 ppm, the concentration of B increases by 2 ppm, and the purity of formed aluminum is 98.96%. , an ingot with a Si content of 20 ppm, an Fe content of 9 ppm, a Ti content of 9 ppm, a B content of 4 ppm, and a total of 57 ppm of the contents of elements other than Mg. The average crystal grain size at this time was 350 μm, and the hardness was 32 HV.

[0239] A size of 331 mm×331 mm×508 mm was cut out from this ingot, and it was used as the following forging raw ma...

Embodiment 2

[0243] Example 2: 0.63% by mass of Mg was added to aluminum with a purity of 99.995% by mass and melted. The melt was cast into an ingot with a length of 3850 mm in a DC casting mold with a thickness of 508 mm and a width of 1110 mm at a casting temperature of 680° C., a casting speed of 52 mm / min, and a cooling water volume of 230 L / min per 1 m of mold length.

[0244] During this casting, a miniaturization agent (Al-5%Ti-1%B) was continuously added to the melt flowing into the mold so that the Ti concentration increased by 8ppm and the B concentration increased by 2ppm, forming aluminum An ingot with a purity of 99.37%, a Si content of 26 ppm, a Fe content of 9 ppm, a Ti content of 5 ppm, a B content of 2 ppm, and a total content of elements other than Mg of 58 ppm. The average crystal grain size at this time was 560 μm, and the hardness was 28 HV.

[0245] A size of 331 mm×331 mm×508 mm was cut out from this ingot, and it was used as the following forging raw material. Th...

Embodiment 3

[0251] An ingot was produced under the same production conditions as in Example 1, and the average grain size and hardness after casting were the same as in Example 1.

[0252] From this ingot, 340 mm x 370 mm x 508 mm was cut out, and as the following forging raw materials, hollow forging was performed by the following method.

[0253] The forging raw material was heated to 373°C, and the first hot forging was performed in 1.18S-(2 / 3U-1.5S)×3 cycles, and ended at 347°C. Next, after reheating to 361°C, perform the second hot forging of (2 / 3U-1.5S)×2 cycles to form a size of Φ450mm×400mm, and then use a punching machine to open a hole in the central part to form an outer diameter Φ472mm-inner diameter Φ140mm×400mm, end at 329°C.

[0254] After cooling the raw material to 35°C, cold forging was carried out for 5.3S to form a shape with an outer diameter of Φ235mm-an inner diameter of Φ130mm×2123mm, and ended at 145°C.

[0255] The forged block was annealed at 300° C. for 60 mi...

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Abstract

Disclosed is a material for prototype aluminum mold for stamper, characterized by having a composition, which comprises 0.5-3.0 mass% of Mg, not more than 500 ppm in total of elements, including unavoidable impurities, other than Mg, and the balance being Al, and a cast structure wherein the average crystal grain diameter is 1000 [mu]m or less and the area ratio of secondary phase grains is 0.10% or less. By miniaturizing aluminum crystal grains, preventing the formation of secondary phase grains and smoothening irregularities caused by mirror polishing, a stamper having a uniform peak-and-valley pattern that is formed by anodization can be obtained.

Description

technical field [0001] The present invention relates to a raw material for an aluminum master mold for a stamper, an aluminum master mold for a stamper, a stamper using the same, and a manufacturing method thereof, which suppress the frequency of occurrence of processing coating defects, the raw material being used for making an aluminum surface Anodized (alumite treatment, hereinafter also referred to as "anodized aluminum coating treatment") formed a mold (stamper) with a concave-convex structure, using the stamper to produce anti-reflective articles, etc. [0002] This application claims priority based on Japanese Patent Application No. 2009-210054 filed in Japan on September 11, 2009, the contents of which are incorporated herein by reference. Background technique [0003] In recent years, studies have been conducted to reduce reflected light from liquid crystal surfaces such as televisions and mobile phones by providing an antireflection structure having a fine concave-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/06B29C33/38C25D11/04C25D11/12C25D11/24
CPCC22C21/06B29K2905/02B29C33/38C25D11/16Y10T428/24479C25D11/12C25D11/24
Inventor 北浩昭白井孝太伊藤久和
Owner NIPPON LIGHT METAL CO LTD
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