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Lattice Hinge Test 2 - 44mm Radius Corner

DefProc — Fri, 16 Nov 2012 13:16:01 GMT

This is part of the lattice hinge test samples as described in http://def-proc.co.uk/b/wghsx If you want to produce products with this very convenient flexible hinge arrangement, you should be aware of the practical limits to ensure your products are not likely to fail in normal use. This product is a 44mm radius, 90 degree corner shape so the samples can be shown at their intended operating condition. Samples are available separately: http://www.ponoko.com/design-your-own/products/lattice-hinge-test-2-small-stress-limitation-9088 Or there's a bundle with test pieces and corner: http://www.ponoko.com/design-your-own/products/lattice-hinge-test-2-stress-limitation-9087

Lattice Hinge Test 2 (small) - Stress Limitation

DefProc — Fri, 16 Nov 2012 13:16:22 GMT

This is the lattice hinge test sample as described in http://def-proc.co.uk/b/wghsx If you want to produce products with this very convenient flexible hinge arrangement, you should be aware of the practical limits to ensure your products are not likely to fail in normal use. The sample contains 3 sizes of hinge, each with the same 44mm internal radius of curvature (47mm external radius), where each has a different calculated maximum stress at 90 degrees. A radius corner is available separately: http://www.ponoko.com/design-your-own/products/lattice-hinge-test-2-44mm-radius-corner-9089 Or all the parts can be ordered together: http://www.ponoko.com/design-your-own/products/lattice-hinge-test-2-stress-limitation-9087 When cut in 3mm acrylic, the smallest 8mm link will bend to 90 degrees but is fragile if mistreated. The middle size 14mm link will bend further, but may not reach 180 degrees if the sample is cold or excessive bending is performed quickly. The tallest sample (28mm) can be bent comfortably to 180 degrees, but is noticeably less stiff than the other two. Having an understanding of how these lattice hinges work will allow you to create better products with less failures.

Lattice Hinge Test 2 - Stress Limitation

DefProc — Fri, 16 Nov 2012 13:16:44 GMT

This is the lattice hinge test sample as described in http://def-proc.co.uk/b/wghsx If you want to produce products with this very convenient flexible hinge arrangement, you should be aware of the practical limits to ensure your products are not likely to fail in normal use. The sample contains 3 sizes of hinge, each with the same 44mm internal radius of curvature (47mm external radius), where each has a different calculated maximum stress at 90 degrees. Also included is a 44mm radius, 90 degree corner shape so the samples can be shown at their intended operating condition. Samples are also available without the corner: http://www.ponoko.com/design-your-own/products/lattice-hinge-test-2-small-stress-limitation-9088 When cut in 3mm acrylic, the smallest 8mm link will bend to 90 degrees but is fragile if mistreated. The middle size 14mm link will bend further, but may not reach 180 degrees if the sample is cold or excessive bending is performed quickly. The tallest sample (28mm) can be bent comfortably to 180 degrees, but is noticeably less stiff than the other two. Having an understanding of how these lattice hinges work will allow you to create better products with less failures.