Pull Switch Suite

by bathrobotics, published

Pull Switch Suite by bathrobotics Jan 4, 2016
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Maybe I will do this.....

04/01/2016 Original Light Pull Switch Weight
05/01/2016 Scaled Up Light Pull Switch Weight
07/01/2016 LightBulb Motif Pull Switch Weight
08/01/2016 LighBulb Motif Pull Switch Weight (no thread)
11/01/2016 Extractor Fan Pull Switch Weight

This is a good little demo of how mass produced moulded design is different from 3D Printed Design.

in this case it isn't Injection moulds, most (UK) electrical polymer parts are made from Thermoset materials. Where Thermoplastic get softer when heated, Thermoset only polymerise once, when two reagents are pressurised and heated in the mould. This makes the parts safer for electrical usage, as if the parts where to get softer as they heat, they might deform and cause electrical contact.

So Thermosets are generally used to contain electrical connections for safety reasons. Please remember this when downloading electrical stuff: 3D PRINTERS USE THERMOPLASTICS.

Next up in my monologue: Angles of Draft. On 3D Prints, you don't have to remove the part from a complex (and expensive) tool, but on the Compression Moulding tools, you can't remove parts with undercut. Ideally designed parts would have no draft on them (for most parts) - it's only added on to make either Die Casting, Injection Moulding or Compression Moulding. 3D Printing allows us to make parts closer to the ideal form - in some instances. In Other ways, we need to add either Support Structure to be broken away or washed off, or design it to be self-supporting.

The original Pull Switch Weights are made from Thermoset polymer, simply to get parts from the same supplier who makes the other thermoset parts.

They don't have to be Thermoset.

I've designed these to be 3D printed replacements for the original Pull Switch Cords.


-EUR ING. Andy Southern

aka BathRobotics.

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Nicely done

Thanks for sharing your design ,-)