02-09-2016, 03:54 PM
Gentlemen
spare me from the inevitable heckling, I know Ive done wrong and I feel bad enough without it being pointed out again.
I have an old bridgeport. Im experimenting with a bit of injection moulding plastic, and as such ive made myself a heated bore, and piston on the lathe.
I ultimately intend to make a press stand so I can force the piston down the hot bore to push the moulten plastic out the nozzle, but Its still very much in proof of concept, at this stage, and as such... (can you spot the mistake) I decided to use the bridgeport
the piston itself, fits into a 19mm collet, so I loaded that into the quill
I heated the piston up (with electric fillament) slotted the piston into the bore, then used the knee to push the bore up over the piston (pushing wet hot plastic out the bottom into the sandwiched mould.
it worked well, although I did need to use a fair amount of force on the poor knee, and lots of the heat from the bore was transferred via the collet into the quill.
For what its worth, the proof of concept worked, and Ive now disassembled.
But I note, that the quill now is progressively stiff the more I extend it out of the head. I fear I have therefore bent something in the head? or (hopefully) the heat has just burnt all the oil lubricating the movement of the quill
I have extensively lubricated everything, the quill does move fully out (albeit towards the end of its stroke, stiffer than it was before).
Any ideas? Think ive knackered the qulll? How do I tell if ive bent something?
spare me from the inevitable heckling, I know Ive done wrong and I feel bad enough without it being pointed out again.
I have an old bridgeport. Im experimenting with a bit of injection moulding plastic, and as such ive made myself a heated bore, and piston on the lathe.
I ultimately intend to make a press stand so I can force the piston down the hot bore to push the moulten plastic out the nozzle, but Its still very much in proof of concept, at this stage, and as such... (can you spot the mistake) I decided to use the bridgeport
the piston itself, fits into a 19mm collet, so I loaded that into the quill
I heated the piston up (with electric fillament) slotted the piston into the bore, then used the knee to push the bore up over the piston (pushing wet hot plastic out the bottom into the sandwiched mould.
it worked well, although I did need to use a fair amount of force on the poor knee, and lots of the heat from the bore was transferred via the collet into the quill.
For what its worth, the proof of concept worked, and Ive now disassembled.
But I note, that the quill now is progressively stiff the more I extend it out of the head. I fear I have therefore bent something in the head? or (hopefully) the heat has just burnt all the oil lubricating the movement of the quill
I have extensively lubricated everything, the quill does move fully out (albeit towards the end of its stroke, stiffer than it was before).
Any ideas? Think ive knackered the qulll? How do I tell if ive bent something?
