Methods of fabricating retroreflector prisms with polygonal apertures and devices thereof

A retroreflector and prism technology is applied in the field of manufacturing retroreflector prisms with polygonal apertures and devices thereof, and can solve problems such as being unsuitable for manufacturing retroreflecting prisms and the like

Active Publication Date: 2020-04-24
美国奥拉福有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional fly-cutting techniques are not suitable for

Method used

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  • Methods of fabricating retroreflector prisms with polygonal apertures and devices thereof
  • Methods of fabricating retroreflector prisms with polygonal apertures and devices thereof
  • Methods of fabricating retroreflector prisms with polygonal apertures and devices thereof

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Embodiment Construction

[0019] see figure 1 , shows an environment 10 for forming retroreflective prisms in a substrate that can be used to fabricate retroreflector molds and retroreflective sheeting using diamond microgouge. Diamond microchiseling (DMC) is a process in which a multi-axis high-precision machine tool cuts diamonds in and out through a substrate to remove material, such as "Diamond MicroChiseling of Large-Scale Retroreflective Arrays" by Brinksmeier et al. (Precision Engineering, 2012, p. 34, No. 4, pp. 650-57), the disclosure of which is hereby incorporated by reference in its entirety. DMC advantageously provides a method for producing retroreflector molds that include polygonal or other similarly shaped retroreflective prisms that cannot be produced using conventional fly-cut techniques. DMC also provides enhanced flexibility in retroreflector design. DMC allows the production of polygonal retroreflectors with increased effective area that meet various global specifications for su...

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Abstract

A method for forming a retroreflective prism in a substrate includes inserting and retracting a single point diamond tool through a surface of the substrate while moving the single point diamond tool,the substrate, or both the single point diamond tool and the substrate in a direction of travel along at least one axis to generate a facet in the substrate having a facet face parallel to the direction of travel of at least one of the single diamond point tool or the substrate. The facet face has an angle defined by a chiseling edge of the single point diamond tool. The inserting and retractingis repeated at a plurality of locations on the substrate to form an array of retroreflective microstructures on the surface of the substrate. At least one of the array of retroreflective microstructures is a retroreflective prism having a polygonal projected aperture.

Description

[0001] This application claims the benefit of US Provisional Patent Application Serial No. 62 / 556,735 filed September 11, 2017, which is hereby incorporated by reference in its entirety. technical field [0002] The present technology relates to methods and apparatus for fabricating retroreflector prisms with polygonal stops. More specifically, the present technology relates to the use of micro-gouge techniques to fabricate retroreflective prisms with polygonal stops. Background technique [0003] Microprismatic retroreflective sheeting has been made using truncated cubes and rectangular full cubes (see, eg, US Patent Nos. 6,253,442; 7,156,527; and 3,689,346). A truncated design is generally not as efficient as a rectangular full cube, and therefore has difficulty meeting some of the newer ASTM and other global specifications for retroreflective sheeting. [0004] Tool fabrication for retroreflective design has been used for single-point diamond scribing or fly-cut control ...

Claims

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Application Information

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IPC IPC(8): B23Q11/00B29D11/00C25D1/00C25D1/10
CPCB29D11/00605B29D11/00625G02B5/124
Inventor S·斯科特A·J·戴维斯
Owner 美国奥拉福有限公司
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