Ran a first test of production cutting PETG film yesterday, 1hr test. (Cutting face shield visors).
At the moment inbuilt fan is not doing much to help with extraction, it takes forever until i can get the lid open.
Current situation is as follows - my machine has inbuilt fan (50W, 150mm), which is pulling air to 1m long 150mm duct, which is reduced/connected to about 15m of 100mm rigid pipe to exhaust outside where another fan (300W impeller) sucks on the exhaust. Without suckage from that fan, the inbuilt one doesnt do much at all.
Problem is, we are in production at the moment (or starting monday anyway), where cut process is about 10sec and then i need to open lid, replace sheet, cut again in as fast a succession as i can. Now i cant as i will drown in PETG smoke/particulates.
I’m planning on wrapping machine in duct tape to close off any gaps in panels, leaving only air inlet under the lid and some for cooling electronics cabinet.
We also have bigger dust extractor on wheels thats connected to big CNC router machine (3x2m celtek 8kw spindle) which we’ll probably pipe in at the end to suck on the pipe from afar (noisy). The extractor specs state 2500 cubic metres of air extraction (per hour?).
Filtration is not in question now, as we work in absolutely desolate place with workshop gate wide open and pipe end sticking out…
How much airflow would you think i would need to have for quick lid opening action ?
Also, probably critical to leave air inlet at business end of tube to prevent smoke settling on output window …
Any thoughts on how to proceed for better turnaround time ?