Vacuum Bag Disk with Minimal Damage on Valve

Przemekgda86 provided an excellent idea to design a vacuum bag disk with "flat" top surface which causes minimal damage on the valve of the bag. They maintain air flow by a meshed structure which is realized by tweaking the slicer settings.

In the present model, I changed the infill selection to 50% zigzag and added side vent holes to the original, to have even better air flow.

As seen in this picture, with setting zero thickness to the top and bottom shell layers, the 50% zigzag infill is exposed on the surfaces. The zigzag infill consists of continuous straight lines arranged in alternating directions within each layer, having sufficient air flow both in vertical and horizontal direction. So, with side vent holes, this disk gives you efficient air flow paths from side to top and uniform physical support of the valve of your vacuum bag.

Printing

The model itself has the blank top/bottom surfaces. 
You need to make it meshed by tweaking your slicer setting.

• Left: model
• Right: sliced

The .3mf file contains the settings below

[Slicer settings you need]

• Quality
  • Layer height → for faster printing and matching to design unit height
    • Layer height : 0.25mm
    • Initial layer height : 0.25mm
      
• Strength
  • Top/bottom shells → to expose infill
    • Top shell layers : 0
    • Bottom shell lyaers : 0
      
  • Sparse Infill → to achieve sufficient air flow and uniform physical support
    • Sparse infil density : 50%
    • Sparse infill pattern : Zig Zag
      

[Optional settings]

• Quality
  • Advanced → for better robustness
    • Only one wall on top surces : Not applied
      
• Strength
  • Walls → for better robustness
    • Wall loops : 3
      

Happy printing!