Max's little robot shop- great info on tooling and diy injection molders

[m_c]

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.

[Robin Hewitt]

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)