Ex-Pat wrote:As mesmerizing as ever Daniel.
You use different types of pin. Does anything in particular govern the use of hooked pins in favour of plain pins?
Good morning Ex-Pat,
Sorry, English is not my language so some subtle stuff gets lost when my lone brain cell try to translate!
When you say 'hooked pins' I am not sure I understand.
Do you mean the ones made with bent steel rod or do you mean the inclined position of the pins?
If your question is about the shape of the pins, well, I use silicone kit for glueing foam and if I want the joint to be really strong and am glueing two thick (50mm or so) foam pieces pulling out the pins once the glue has set will requiere some serious pulling because both, the long friction surface between the whole length of the pin and the foam but also the siliconekit the pin was pushed through to hold both foam pieces toguether. A plain pin would be more difficult to pull but a bent one solves the problem.
If, instead, your question is about the orientation of the pins not perpendicular to the foam's surface but at an angle, that is an ancient carpentry trick to ensure two pieces of material that for some reason can't be clamped will hold together strongly:
Here the different options on pins orientation:
IMG_0107 (2) by
Daniel Osvaldo Caso, on Flickr
IMG_0110 (2) by
Daniel Osvaldo Caso, on Flickr
IMG_0108 (2) by
Daniel Osvaldo Caso, on Flickr
The pins in the first image will hold the pieces sideways in place but couldn't ensure much presure.
The second image will hold too, but not much and will be too vulnerable to every slightest blow from the left (on the top piece) or from the right (on the piece below)
The third image let's see the most secure way: the strength of the material is trhe limit but the pins won't allow the material sliding in any direction.
Let me know if it's not clear.
Daniel
Daniel