I would think that would cost more than manual machining.

Assuming you can get 1" squae bar, I would set a stop on a chop or crosscut saw saw and be able to cut them to length very quickly. Simple locating jig on a drill press (you don't state tollerance on hole) and drill one set of holes, change drill and do the others

.

Interesting assumption

… I was about to ask for confirmation of the units

[having first thought them likely to be millimetres]

I suppose it depends how you think of "small"

MichaelG.

.

Thanks for that important clarification, John

Next question [which Jason has already mentioned] must be

… 'what are the tolerances?'

I think you might have difficulty with a 1.80mm dia. hole in Nylon.

MichaelG.

Obviously 4mm square stock is the ideal material if you can get it, maybe jig drill the holes then cut off to finished length or cut off to length & drill the holes? Deburring will be tiresome.

Tony

2nd hand hand injection moulder & home made tooling, and sell the moulder afterwards? There is a Gingery book on it to give an idea, but the biggest problem is buying the material to be injected. Well nigh impossible on a small scale.

Hmm seem to be arguing against my own idea.

What value can you extract from each, and is there a possibility of future manufacture? May be more cost effective to pass on the job or let someone else have the agro.

As for the tolerance you are specifying, that's tight enough for a plastic to need to specify the temperature and material water content at which it's to be measured. Some types of Nylon can shrink by 10% when going from saturated to dry.

Regards,

Richard

Edited By richardandtracy on 29/03/2017 10:22:38

it is probable best to speak to an injection moulding company. They may have ways to prototype parts at lower cost than normal volume parts. It all depends on what you can afford to spend in money or time. If time is not important but money is then cut from sheet and use a jig to drill both holes from one end datum not the middle as drawn. Forget the length tolerance unless it needs to fit into something.

You can get 4mm square nylon strimmer cord. It comes on a reel but a bit of warmth should allow it to be straightened out before use. Due to the problems of drilling plastics with accurate sized holes what are the material requirements you need to meet, something else may be a better option.

Martin C.

Have you tried the estimators on http://www.custompartnet.com **LINK** ?

Brian

Edited By Brian G on 29/03/2017 11:14:32

P.S it you buy me an SLA printer I will do them for FREE

Holes should be treated as approximate size.

No, it couldn't so each hole would need reaming to final size. Also I doubt the whole print could hold that tolerance. But considering the time saving and the fact an 3D SLA printer can be had for just over £1k it's a pretty good trade off, with no tooling required other than a reamer.

One, or the array ?

The array can be printed in several hours and all 2000 in one session to fit the print bed. Resolution is a big issue at 100 micron in XY and 25 micron in Z Then a day or two doing the clean up and reaming/sizing.

So about £0.55 per part.

Worst still the resolution in XY is 300 micron (0.3mm)

Edited By Joules Beech on 29/03/2017 12:24:24

Edited By Joules Beech on 29/03/2017 12:30:43