Inventing greenhouse clips

Playing with 3d modelling and printing. This is the latest version of a greenhouse clip we invented. You twist it into the aluminium frame and then have a convenient eyelet for tying string to.

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This is at least the third iteration of this invention. The first one had a couple of springy ‘levers’ on the shoulders to pull agains the inside of the aluminum ‘gutter’ and hold the device firm against the outer side. UNfortunately the springs were not reliable, broke off, impossible to get tension right, and too detailed to print.

So back to basics – it transpired that all we needed to do was to slope the shoulders in the extra dimension so that twisting it into the groove automatically pulls the clip agains the metal. Job done. Easy to print too.

The only improvement to make is to work out the best type of filament to print this with. PLA as in the prototype has a habit of breaking down over time when exposed to sunlight so not really ideal for greenhouse use.

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Categorized as 3d