Toon Chris Posted January 1, 2010 Share Posted January 1, 2010 I am interested if any of you professional people can think of a way to make a rough copy of this? Its a coin/button battery (CR2032) holder for a car key which should give you a good idea of scale. The battery fits/clips into the round section and slides into the key where it connects to prongs etc. It doesn't have to clip in, it can just rest in but it must be reasonably snug in place. The flat base fits the hole in the key and keeps everything in place. The little screw isn't necessary as glue will do to keep the assembly in. You can't buy these battery holders and they are commonly lost. I could do with anything between 5 and 50 to start with and they need to be about a pound each (possibly 2 pounds as a maximum). I've tried to think how I can make them but am not getting far. They are easy enough to make a mould of I think, but then what? Any ideas gratefully accepted! Quote Link to comment Share on other sites More sharing options...
rtbiscuit Posted January 1, 2010 Share Posted January 1, 2010 shame i don't work at chelmer anymore we had a rapid prototyper there. Quote Link to comment Share on other sites More sharing options...
Toon Chris Posted January 1, 2010 Author Share Posted January 1, 2010 shame i don't work at chelmer anymore we had a rapid prototyper there. Go back, go back! Seriously though, I've had a quick google and it seems a good idea. Trouble is I don't have a CAD drawing, just a part. Quote Link to comment Share on other sites More sharing options...
rich5259 Posted January 1, 2010 Share Posted January 1, 2010 Make a silicon mould of the item (this removes the need for CAD model and SLA unit), carefully cut this in 2 so it can be put back together with a void in the middle. Get a good quailty resin and inject it into your mould. Wait for it to harden and remove the silicone mould. repeat as necessary. Quote Link to comment Share on other sites More sharing options...
Husky Posted January 1, 2010 Share Posted January 1, 2010 rich has a good plan there. failing that, that would be extremely easy to cad up in about 15 mins Quote Link to comment Share on other sites More sharing options...
Toon Chris Posted January 2, 2010 Author Share Posted January 2, 2010 Thanks Guys, Silicon sounds doable but what do you mean about cut in two with a void? Why does it need to be cut in two? Is the silicon not flexible enough to pop the original and any injected resin out again? Maybe by void you mean an excess area in the mould which you file off the moulded part afterwards? I can probably source some silicon for moulding via the Web (or maybe my mate who owns a specialist glass-fibre company) but do you have a recommendation for a type of silicon and resin yourself? I need the resin to be as hard as plastic but not fragile. Husky - easy for you to CAD maybe, for me a 10 week course Sorry for all the questions. maybe I can pay back with some specialist glass-fibre sometime... Quote Link to comment Share on other sites More sharing options...
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