@pporg I think I added the .f3d file, it doesn’t work ?
I will modify it, it seams that the 36mm hex bar is an easy one to get a bit everywhere around the world. Motor side is very depending on what you find.
A real motor alignment is something close to impossible if you don’t have a kick ass milling machine where you can put the entire frame on…[Read more]
Finally made the 3d for this coupling, I share the link for fusion 360 and .step file under.
It is made for a 25mm axis in shredder side and 35mm in motor side. I will try to modify it for a parametric system soon, but I have to learn how to do it.
@s2019 I have more expertise into material sciences and welding, so hydraulics is quiet new to me. I worked on boiler building for a few years, so I know the pressure danger, pressure gauge and safety valve, even if in that case, I don’t really know where to place them. I’ll dive into that, there is probably a way to monitor hydraulic pressure or…[Read more]
@s2019 I am currently building a new injection machine for myself, based on air driven hydraulic press ! I shall have all materials befor this week-end, the building should start friday evening.
I have a question, that you might have the aswer : I am afraid of the really high pressure that can be put in the mould, with no real control (you don’t…[Read more]
@s2019, thanks for your inputs !
I have a 1mm fillet at the base, so no sharp cut, but maybe not flared enough. I will have a big review on the drawings.
I made some in workshop load test before going into water, but my main mistake was not breaking any commercial fins to get a reference value… I am still very reluctant to this idea, but I…[Read more]
I managed to make the first testing, and… it didn’t end well !
If during the whole session the fins were super nice to surf, no speed lost at all on turns, on the last wave, they sudently desapear ! The wave was slightly bigger, but still : not strong enough at all !
I tested then on shore other fins, injected with only PP, and they are even…[Read more]
That looks nice !
What size is the pipe / max volume of plastic ? Wouldn’t it be more compact if the rack & pignon were smaller to go inside the barrel and then having a smaller round bar (but then maybe not strong enough) ?
It looks a bit like Taller Esferica one, did you do it in collaboration with them ?
MECHANICAL TEST ON ROPE
We went recently on a laboratory to be able to do some tensile test on ropes. Result are very promising as you can see on curves obtained, we have a very classical elastic material comportment.
Result can be summarized that way :
– Each 1mm strip included in a rope can hold 2,5kg, before rope definitive deformation, and…[Read more]
COMPLETE BENCH MAKING
Then this cutter will be integrated in a small production line to be able to process it efficiently. The bench is though to be built completely as the fist time, and complete step by step by adding the tools depending on what is wanted.
It will contain 3 modules :
– Pre-cut bottle bottom to increase production
– Strip…[Read more]
HOW TO BUILT AND USE THE CUTTER
– Bearings sharpening
– 0,5mm precision for bearing and guide position holes
– Welding and threading needed
– 0,5mm precision cut for spacers
Machine needed :
– Grinder with cutting disk
– Table grinder
– Drill press
– Welding machine
– Measuring and marking
– Thread makers
– Cut a…[Read more]
Sorry, long time not posting here, but it doesn’t mean I didn’t work on it !
I actually spend quiet a lot of time figuring out a reliable method to make strip and wire out of PET, and then design a built a first prototype. This have to be seen as a production line to obtain a base material, this material having to be used in various appl…[Read more]
As for making my fins, I need a good mix of the plastic, I really like the idea of having a screw that would pre-mix and bring the plastic directly into the injection chamber.
I might consider making something similar, but with less automation probably (I am not really confortable building automation system). I have a question : how the…[Read more]
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