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View Full Version : Max's little robot shop- great info on tooling and diy injection molders



gavztheouch
14-02-2014, 03:40 PM
Max's Little Robot Shop - NeRP - Neighborhood Roving Platform (http://www.users.qwest.net/~kmaxon/page/side/robot11035_137.htm)

Looks like a great resource and one hell of a moulder

gavztheouch
14-02-2014, 04:09 PM
Max's Little Robot Shop - NeRP - Neighborhood Roving Platform (http://www.users.qwest.net/~kmaxon/page/side/robot11035_137.htm)

Looks like a great resource and one hell of a moulder

Max's Little Robot Shop - NeRP - Neighborhood Roving Platform (http://www.users.qwest.net/~kmaxon/page/side/robot11035_137.htm)

above link is a walk through on making a mold tool.

Robin Hewitt
15-02-2014, 01:29 PM
Such fun (smily face) :tickled_pink: excellent web find (big thumbs up)

Interesting use of springs to withdraw the ejectors, wonder why. I had the notion that you used the ejector ram to pull the ejectors nearly back, so they could not possibly touch the opposite mould plate, then used extra pins to connect that plate to the ejector plate and finish the job (perplexed smily)

m_c
15-02-2014, 03:04 PM
I always thought they used springs to retract the ejector pins?
The ejector pins don't touch the opposite mould plate, that's the core pins that touch it.

m_c
15-02-2014, 03:08 PM
Has anybody checked out the Injection Moulding machine pages?
Home Injection Molding (http://www.users.qwest.net/~kmaxon/page/side/mold_mach_137.htm)

It's a bit...erm...elaborate.
Kudos to the guy for doing it, but the machine does seem overly engineered!

Robin Hewitt
15-02-2014, 06:12 PM
I always thought they used springs to retract the ejector pins?
The ejector pins don't touch the opposite mould plate, that's the core pins that touch it.


Don't take me as some kind of expert for Gawd's sake (look of horror smiley)

I have done lots of reading about making moulds but I have never seen springs used before.

Is it possible his ejection mechanism can only push? (bewildered smily)

mekanik
15-02-2014, 06:36 PM
Hi Robin
Going from the worksmanship and design of some of this guys kit i would think he comes from a heavy engineering(MIL Spec) type background. My mate used to make die4s for an Electrical Component Factory and i am sure he has mentioned ejector springs when he has talked about it.
Will ask him in the morning(if i remember)
Mike

Lee Roberts
15-02-2014, 10:37 PM
Check out his gallery page, guy is hardcore on everything.

.Me

katie87
27-10-2014, 08:37 AM
I think, springs are not used to eject any product.