Burkhardt
09-14-2016, 08:24 PM
I have been using custom one-time-use vacuum pods for some time to machine bowls and trays where the raw material is barely larger than the final product. So far, I used adhesive foam strips for sealing which works but is a bit cumbersome to apply.
This time I tried using thin non-skid shelf liner (also sold as non-skid rug underlay). It is non-adhesive and just cut roughly to shape. While normally rather porous, it compresses and seals under vacuum load very well. I guess that is what I will normally use in the future when the gaps are less than maybe 0.04". Beyond that the foam strips are still required.
Note, the pics are simulated on the pod with the final finished part (it is a small rectangular olive tray made from Canary Wood). But I forgot to take pictures while machining...
This would actually be a nice method for series production. Unfortunately, I don't do series production.
This is the vac pod (without and with the sealing layer) made from scrap pine board.
https://lh3.googleusercontent.com/CJSkKM4hht78ZULzVzEqURMk3iVUTDJjmQlN9_8OH18uOpxqxi PfZ5zqYBX1nHKveB0c2Gs2AJpw-fu1jJVmlu0cGb-pJTpX-WWWVeQCRJgAxoY9YzKplP_Uo61ThKlQgAdK23aDhOGGs8z0Euw 8zLTk5fHJi2D9b2I0Zzg6zJmgpQdJoBb-joCUocvO5cZEqgjv94i3lUIHQCI1QxOdL2ixE1Kez5lxtE0wHk FuDICX8TZyUBR2Xl17q3XJEs37cjV5InGOnDP9EOe0OO9YW-3my9ehP6QR4CNeb2dqUgausnqWEe8QXh3FcqZc3dPJXNtk-fd6x-kI8aAc8PvVxE4jk87lM59rllPN6JPRAh7Id0oyphwY-vdQMr-4julbvvIOxlehnhsbsAj_nPx5Edr1VHPhW6XMuNS47_fFIP8Hw fFiPwpKY7P_LRq0RWkakQKy13PjsQbd38qhsln1EWI1em8-Gst73Insm8q_KRPJUYyYZZEzPoOmXcwxT2PODnZMaTKOZxtBmk hQ8zEG4xkML45JcrdXTFg_mPatIU_dn0DVB8FPJHoeZbbnkC-euDYm_dznn79yGMXOTgBfdwvrZJuOonhd_TSj9IKhHAan7w31= w586-h955-no https://lh3.googleusercontent.com/KHDq1MeuxbEjigf8OcvYM_i81QMZ3RRnIBX5QEDZGDJs-ebik9CpUfpAFyMef-RTRw6K8p0AHlUk5xLOQSysc2pX0TmI5yOPLzxlWFMsBk2yQXgO qTRKnSVgOw8KLfRAtS8VQaQBa_DxqUakOYTGedNhkIjbBDaYo7 2M3HTOeLNn9flCSF4KE08pMqWc_iCEYjqQbUq6-o9UAt7HakWf7KpWTgNOUZu15uxA5D9rnASfIAW4AG8cvV-DrBf2e82QF7fNG2BYJWRgnhBtz3juh7NjsO5YzdsblKNfNjyJT EwSIiyRVaFd6AB-Hzk0wTQIL-0a9pMvtEB-gwQRoUgRB1eLBDH_fZMGahE5IYUXhtzN2WhagqFIFQTzoRfimH q3KYG05Ia5GKrCloQ8cz7gCvHNimizD9z7u7CldATnUSzH_rgL O-9nbp4SYo9SGuz8PiXIH-yGpQFv1KCnZCyAv3sR_fojizS1w2yIjzZT8DLDlAuANivKhImn 3G7Tm7LOR3nmVgAdH-lN6YTN1Bt9pueppnYdP9i8NYnwOsFwafGqnBB7Oj-4IXkLI3f3Ut9yzqTyLHoysT-b-lorKxs-a7o6xQg_6DcW-1jWTKg80GI63Pzb=w588-h955-no
Bottom side and top side (like when it was machined):
https://lh3.googleusercontent.com/GfDxVnjkM1G_59GCM8wvui23zQ4hIJwh9BOb76j2QtTb4734Wf Rg8A8rXWx2zuPc3XvTjbo_SnjpkxLxYlpdHJymS3t-r6PK_00EMlxEpPmpiMps4GXwMh9M7eHaeEoal6TATxh95aSpTC aGXQ14NE3XbExgfOw9hFmomhikwpzCbYDVGLRn3alJwht9Thq2 pQXUqWXpxMbZBVWLJPsrsq01-bJXjXWoj-XozHKzJKN4UECXnP2K-KlSbSdDhZbeeBTiMTkS6lWBvVDTpuG3NHgnQzxeHHFYngPex1Q A_iT6f0ZxG3J36gTmo0_uwf5qcSU2ebiiguw7qXj2ZjbJXcU0P Qf3H0WeQDHyWdJuVWh2MapAU9YssYqFIkI4DNU2EqRW7uAjToC qcnSQdMOyKzXs0RYSmP3QRUFy_RTewowVGNUD3feBW6aDp-3oct8JB1edrpP7A28KBQBv2UzS4u06dgiG5LhxbESV3I7NmMwG ewim6EQR5kx5kzdwP8k0ekFAeLOMZvEvw7jSiNch3KxupAIms6 Gz-1LxkCc-15lNGcVfaQnCE-1L44X5SyWhbYJC2lmmhPGQ1DZ4cvt5UCXhyg1ObXw8lvr22kS8 xtg_oYHY=w606-h955-no https://lh3.googleusercontent.com/ZNgxKVCJgBxY45AIZ1xtntrMKYtnbqbA6ur3azQZlCucb69Gg-QkHvjikRBMqFeg-F9WeHL_eTEoSayPTDvce4gmucp97uD9nnmzU9RnoCDoxPV8-i-d8_TQdevuvRzSAczVo9yjsfa-9DfJL3eEBc8RNRrZPxzxuEHOJAgKLCMQ4MJBZFZnUP8fgNeY_a uXelOX4Ufm20PIOMx-7XYTjDrMrC5i0oLbGwNxJ5yJL0HjlLxy0OOnIgHZTvU2XjN-0nBrV_Vh4Apy9l_yTi4JC38c6aUVMjjn9jB_VISLbUy3kj4e-SuPCdMn6AP8q3BNrk6W_hHuNCC-6bPxj9RAs-D3N_geGxfVATUrd39gvksDspPgSX6xwsY7GnEDCgh4trwkJRZ-v5rprqVnPK32r90sYGc4ZUvo1mtxSvYLy6H5_MGmSJ2TrDVSb9 xK8PV6z3R9dJZkfZ5PA5V7rCx6ylrVJ9EIs7GIiONoyfWD7dDG uO1mqLPTnvnkDe0CrIaFgM-2jdaKCbnsl7RW7M5kfuEl8F_3pn6RbvTTNr9y53jmXD35HNGCn Vpt6TWYtnIgUNNY7FeU8We2Pj1dFzQLzZqQAhfRAw55OXYAUWi 6cqic9ARM=w607-h955-no
This time I tried using thin non-skid shelf liner (also sold as non-skid rug underlay). It is non-adhesive and just cut roughly to shape. While normally rather porous, it compresses and seals under vacuum load very well. I guess that is what I will normally use in the future when the gaps are less than maybe 0.04". Beyond that the foam strips are still required.
Note, the pics are simulated on the pod with the final finished part (it is a small rectangular olive tray made from Canary Wood). But I forgot to take pictures while machining...
This would actually be a nice method for series production. Unfortunately, I don't do series production.
This is the vac pod (without and with the sealing layer) made from scrap pine board.
https://lh3.googleusercontent.com/CJSkKM4hht78ZULzVzEqURMk3iVUTDJjmQlN9_8OH18uOpxqxi PfZ5zqYBX1nHKveB0c2Gs2AJpw-fu1jJVmlu0cGb-pJTpX-WWWVeQCRJgAxoY9YzKplP_Uo61ThKlQgAdK23aDhOGGs8z0Euw 8zLTk5fHJi2D9b2I0Zzg6zJmgpQdJoBb-joCUocvO5cZEqgjv94i3lUIHQCI1QxOdL2ixE1Kez5lxtE0wHk FuDICX8TZyUBR2Xl17q3XJEs37cjV5InGOnDP9EOe0OO9YW-3my9ehP6QR4CNeb2dqUgausnqWEe8QXh3FcqZc3dPJXNtk-fd6x-kI8aAc8PvVxE4jk87lM59rllPN6JPRAh7Id0oyphwY-vdQMr-4julbvvIOxlehnhsbsAj_nPx5Edr1VHPhW6XMuNS47_fFIP8Hw fFiPwpKY7P_LRq0RWkakQKy13PjsQbd38qhsln1EWI1em8-Gst73Insm8q_KRPJUYyYZZEzPoOmXcwxT2PODnZMaTKOZxtBmk hQ8zEG4xkML45JcrdXTFg_mPatIU_dn0DVB8FPJHoeZbbnkC-euDYm_dznn79yGMXOTgBfdwvrZJuOonhd_TSj9IKhHAan7w31= w586-h955-no https://lh3.googleusercontent.com/KHDq1MeuxbEjigf8OcvYM_i81QMZ3RRnIBX5QEDZGDJs-ebik9CpUfpAFyMef-RTRw6K8p0AHlUk5xLOQSysc2pX0TmI5yOPLzxlWFMsBk2yQXgO qTRKnSVgOw8KLfRAtS8VQaQBa_DxqUakOYTGedNhkIjbBDaYo7 2M3HTOeLNn9flCSF4KE08pMqWc_iCEYjqQbUq6-o9UAt7HakWf7KpWTgNOUZu15uxA5D9rnASfIAW4AG8cvV-DrBf2e82QF7fNG2BYJWRgnhBtz3juh7NjsO5YzdsblKNfNjyJT EwSIiyRVaFd6AB-Hzk0wTQIL-0a9pMvtEB-gwQRoUgRB1eLBDH_fZMGahE5IYUXhtzN2WhagqFIFQTzoRfimH q3KYG05Ia5GKrCloQ8cz7gCvHNimizD9z7u7CldATnUSzH_rgL O-9nbp4SYo9SGuz8PiXIH-yGpQFv1KCnZCyAv3sR_fojizS1w2yIjzZT8DLDlAuANivKhImn 3G7Tm7LOR3nmVgAdH-lN6YTN1Bt9pueppnYdP9i8NYnwOsFwafGqnBB7Oj-4IXkLI3f3Ut9yzqTyLHoysT-b-lorKxs-a7o6xQg_6DcW-1jWTKg80GI63Pzb=w588-h955-no
Bottom side and top side (like when it was machined):
https://lh3.googleusercontent.com/GfDxVnjkM1G_59GCM8wvui23zQ4hIJwh9BOb76j2QtTb4734Wf Rg8A8rXWx2zuPc3XvTjbo_SnjpkxLxYlpdHJymS3t-r6PK_00EMlxEpPmpiMps4GXwMh9M7eHaeEoal6TATxh95aSpTC aGXQ14NE3XbExgfOw9hFmomhikwpzCbYDVGLRn3alJwht9Thq2 pQXUqWXpxMbZBVWLJPsrsq01-bJXjXWoj-XozHKzJKN4UECXnP2K-KlSbSdDhZbeeBTiMTkS6lWBvVDTpuG3NHgnQzxeHHFYngPex1Q A_iT6f0ZxG3J36gTmo0_uwf5qcSU2ebiiguw7qXj2ZjbJXcU0P Qf3H0WeQDHyWdJuVWh2MapAU9YssYqFIkI4DNU2EqRW7uAjToC qcnSQdMOyKzXs0RYSmP3QRUFy_RTewowVGNUD3feBW6aDp-3oct8JB1edrpP7A28KBQBv2UzS4u06dgiG5LhxbESV3I7NmMwG ewim6EQR5kx5kzdwP8k0ekFAeLOMZvEvw7jSiNch3KxupAIms6 Gz-1LxkCc-15lNGcVfaQnCE-1L44X5SyWhbYJC2lmmhPGQ1DZ4cvt5UCXhyg1ObXw8lvr22kS8 xtg_oYHY=w606-h955-no https://lh3.googleusercontent.com/ZNgxKVCJgBxY45AIZ1xtntrMKYtnbqbA6ur3azQZlCucb69Gg-QkHvjikRBMqFeg-F9WeHL_eTEoSayPTDvce4gmucp97uD9nnmzU9RnoCDoxPV8-i-d8_TQdevuvRzSAczVo9yjsfa-9DfJL3eEBc8RNRrZPxzxuEHOJAgKLCMQ4MJBZFZnUP8fgNeY_a uXelOX4Ufm20PIOMx-7XYTjDrMrC5i0oLbGwNxJ5yJL0HjlLxy0OOnIgHZTvU2XjN-0nBrV_Vh4Apy9l_yTi4JC38c6aUVMjjn9jB_VISLbUy3kj4e-SuPCdMn6AP8q3BNrk6W_hHuNCC-6bPxj9RAs-D3N_geGxfVATUrd39gvksDspPgSX6xwsY7GnEDCgh4trwkJRZ-v5rprqVnPK32r90sYGc4ZUvo1mtxSvYLy6H5_MGmSJ2TrDVSb9 xK8PV6z3R9dJZkfZ5PA5V7rCx6ylrVJ9EIs7GIiONoyfWD7dDG uO1mqLPTnvnkDe0CrIaFgM-2jdaKCbnsl7RW7M5kfuEl8F_3pn6RbvTTNr9y53jmXD35HNGCn Vpt6TWYtnIgUNNY7FeU8We2Pj1dFzQLzZqQAhfRAw55OXYAUWi 6cqic9ARM=w607-h955-no