openscad:
http://openscad.org/parametric concrete glande scoop script:
Quote:// Curious Aardvarks concrete glande scoops
$fn=75;
gd=35; // glande diameter
gl=60; // glande length
ll=4; // intersecting lip length
st=4; // shell thickness
module recess(){
difference(){
hull(){
translate([0,0,-gd/2])cylinder(d=gd+st*2, h=gd,$fn=6);
translate([0,0,gl/2])resize([gd+st*2,gd+st*2,gl]) sphere(d=gd);
} // end hull
translate([0,0,gl]) cube([gd+2*st,gd+2*st,gl],true);
translate([0,0,gl/2])resize([gd,gd,gl]) sphere(d=gd);
translate([0,0,gl/2-ll]) cylinder(d=gd+st+0.4,h=ll);
} // end diff
} // end mod recess
module lip(){
difference(){
hull(){
translate([0,0,-gd/2])cylinder(d=gd+st*2, h=gd,$fn=6);
translate([0,0,gl/2])resize([gd+st*2,gd+st*2,gl]) sphere(d=gd);
} // end hull
translate([0,0,gl]) cube([gd+2*st,gd+2*st,gl],true);
translate([0,0,gl/2])resize([gd,gd,gl]) sphere(d=gd);
translate([0,0,gl/2-ll])difference(){
cylinder(d=gd+3*st,h=ll+1);
cylinder(d=gd+st-0.4,h=ll);
} // end diff
} // end diff
} // end mod lip
translate([gd*1.5,0,0])recess();
lip();
copy and paste the above into openscad.
Change parameters for glande diameter and length, shell thickness and lip length. Then hit 'f6'.
generates a positive and negative mould at the same time.
If you have the diameter and length the same - it creates a spherical mould.
The recess and lip are half the thickness of the shell thickness - so don't make the shell too thin.
I could have given it, it's own thickness but i couldn't be arsed
Why would you EVER put a 3d printer away ??????
the single most useful manufacturing tool I own
I've currently got one printing polyurethane indestructibly sling pouches and another printing the example mould set
I'll most likely modify this script over time.
Already thought of a way to reduce seams and i'll have it automatically write the glande size of the moulds on them at some point as well.
But this is the 10 minute version
pva is added to concrete to increase it's flexibility and to help different layers adhere to each other. Substitute some of the water for pva.
The shredded newspaper is just because most people have newspapers and document shredders these days - so use what you have
Jute fibres will no doubt work just as well
Oh yeah if you find the concrete sticks to the printed moulds - knock them a few times before openeing. That should cause vibration to force water to the surface of the cement and that should act as a release agent.
Or not - I'm basically making this up as i go along
And did you know the official way to check how thick/viscous cement is, is called checking the 'slumpage'.
You dump a measured amount of cement on a flat surface and measure the diameter it spreads out to - ie: the degree of slumpage.
That is true !
https://www.pavingexpert.com/conc_slump