Heart Shaped Box w/ hinges, encapsulated magnets (print-in-place, no supports, parametric design)

Heart-shaped hinged box with magnetic closure is parameterized for any size, with any magnets. No assembly after print!
4h 9m
4× print file
0.20 mm
0.40 mm
47.00 g
In the contest Valentine's Classics
12
66
0
381
updated February 14, 2024

Description

PDF

Printing instructions:

Magnet encapsulation in PrusaSlicer is accomplished by pausing the print before the layer that covers them:

  • Slice the 3mf file according to your preferences.
  • Scroll to the first layer that will cover the magnets. 
  • Right-click the button attached to the scroll bar and select “pause.”
  • Enter any text that you want to appear on the Printer screen.
  • Re-slice.
  • Print the model, and insert magnets when it pauses.
  • Resume print. Enjoy!

The 3mf and gcode files include the following parameters:

  • Box size indicated for each file. The box depth is the full depth when closed. 
  • Hinge tolerances of 0.15 mm
  • General (magnet) tolerances of 0.10 mm
  • Regarding magnets:
    • A magnet tester model is available so you can try out the magnet fit before committing to printing the whole box.
    • Magnet sizes currently available:
      • Cylindrical magnet 1: diameter 6 mm, depth 2 mm.
      • Rectangular magnet 1: depth & width: 3.175 mm (1/8 in), length 6.35 mm (¼ in) (These magnets are available here)
      • More magnet sizes coming soon! Put your requests in!
    • The magnet tolerance should be a tight fit and require a little force to press in. That helps prevent the magnet jumping out to attach itself to the print head.
    • If the tolerance is too loose for you and you can't do the parameterization, try shrinking the whole thing down a few percent. The box will be smaller, but so will the tolerances.

Let me know if you want me to make any files for you with specified parameters to suit your need. 

Parametric file

First, select cylindrical (aka circular) or rectangular magnets. 

  • There are two feature groups named “circ magnet” and “rect magnet.” (See below for screenshots) 
  • Suppress the feature group you don't want.
  • Unsuppress the feature group you want. 
  • For cylindrical magnets, be sure to enter the diameter in both the length and width parameters as described below. 

Access the parameters in Fusion 360 by clicking MODIFY > Change Parameters. See the screenshot below for an example. 

The parametric file also includes a magnet test model. After you change your magnet parameters, you can print this to see whether you need to adjust. 

Parameters:

  • box_depth: The depth of the box when it is closed.
  • heart_width: The width of the heart shape at its widest point.
  • hinge_diameter: The diameter of the hinge, of course. 6 mm Seems to be a good size.
  • magnet_cover_thickness: The thickness of the wall above the magnet, holding it in place. It is recommended to use 3 layer-heights for this, 
  • magnet_length, magnet_width, magnet_depth: What they sound like! For cylindrical magnets, put the diameter in both the length and width parameters.
    • Note: When you change the magnet size, the part of the heart shape that accommodates the magnet automatically adjusts. Please let me know if you have any difficulty with this.
  • tolerance_hinges: The tolerance for the hinges needs to be slightly more forgiving than for the magnets. The default is 0.15 mm. 
  • tolerance_magnet_sides: For the sides of the magnets. The default is 0.1 mm.
    • Important: You want the magnet to fit snugly in its place, so that the friction holding it in place is sufficient to prevent the magnet from jumping out and attaching itself to the print head.
  • tolerance_magnet_depth: This is the tolerance for the depth of the magnet, so you can ensure the magnets are not sticking up when the print head tries to go over it. The default value is 0.2 mm.
  • wall_thickness: Just as it sounds! This applies to all the walls except the magnet cover. 

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Model origin

The author marked this model as their own original creation.

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