Drag knife for corrugated?

New Home Forum LowRider Advice – LowRider Drag knife for corrugated?

This topic contains 8 replies, has 5 voices, and was last updated by  dkj4linux 2 months ago.

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  • #114051

    Steve
    Participant

    Hello – I’m wondering if anyone is running a Lowrider with a drag knife for cutting corrugated cardboard?

    I’d like to use it to make packaging, so it doesn’t have to be mega precise, but just wondering if one of the many blade style drag knives out there would work well enough in the thickness of corrugated you’d find in USPS flat rate boxes.

    Thanks

     

    #114072

    Jeffeb3
    Participant

    What about one of those 2.5W bangfood lasers?

    #114077

    Barry
    Participant

    The knives I’ve seen used for corrugated vibrate.  Well, actually they oscillate, but you can’t really see the blade move, it’s like half a mm stroke.  A regular drag knife might work though, you’d need to put a pretty good down force on it though.

    #114078

    dkj4linux
    Participant

    Donek Tools has a heavy-duty drag knife that uses standard utility blades…

    https://donektools.com/product/d4-drag-knife/

    Pretty pricey ($249 IIRC) but well made and able to cut thick (1/4″) materials like coroplast and corrugated cardboard. The D4 model has a 1/4″ shank that chucks up in 1/4″ router collet.

    #114082

    Aaron
    Participant

    Donek Tools has a heavy-duty drag knife that uses standard utility blades…

    https://donektools.com/product/d4-drag-knife/

    Pretty pricey ($249 IIRC) but well made and able to cut thick (1/4″) materials like coroplast and corrugated cardboard. The D4 model has a 1/4″ shank that chucks up in 1/4″ router collet.

    I was gonna mention this exact tool! There are printed variations of it on thingiverse, but I do not know how they compare to the donek.

    #114098

    Barry
    Participant

    Donek Tools has a heavy-duty drag knife that uses standard utility blades…

    https://donektools.com/product/d4-drag-knife/

    Pretty pricey ($249 IIRC) but well made and able to cut thick (1/4″) materials like coroplast and corrugated cardboard. The D4 model has a 1/4″ shank that chucks up in 1/4″ router collet.

    I was gonna mention this exact tool! There are printed variations of it on thingiverse, but I do not know how they compare to the donek.

    Printed version would be a good start then.  If it works, but breaks after a while might be worth the price of the real one.

    #114336

    Steve
    Participant

    The knives I’ve seen used for corrugated vibrate. Well, actually they oscillate, but you can’t really see the blade move, it’s like half a mm stroke. A regular drag knife might work though, you’d need to put a pretty good down force on it though.

    That’s my worry…the downforce being sufficient with the Lowrider structure.  Sometimes the cut would go all the way through, and sometimes just half way, depending on the fold/cut.

    Maybe the idea of a laser is better…sounds like more fun anyway 🙂  I’d imagine I could vary the output power to cut half/full way?

     

    #114408

    Barry
    Participant

    Corrugated is funny with lasers.  The corrugations can cause laser focus issues, which usually ends with fire.

     

    If you’re using the spindle mounted drag knife, I’d think it would have enough weight behind it.  The vibro knives just help with tight radius cuts.  Like the half lap grid cuts for making bottle separators.

    • This reply was modified 2 months ago by  Barry.
    #114415

    dkj4linux
    Participant

    Check this post to see cutting IIRC 3mm corrugated cardboard with a 2.5 – 3.5 watt Banggood laser…

    https://www.v1engineering.com/forum/topic/mpcnc-inspired-corexy-laser-engraver/#post-36423

    It’s not terribly fast but it is pretty clean. The secret is to have good airflow to clear smoke and suppress flames — I think a shroud of some kind is crucial — and absolute BEST FOCUS to cut in one pass. This was with focus on top of material (using Ryan’s laser focus script) and 100 mm/min at full power.

    This thread also has some good information for cutting cardboard with a laser… IIRC I was able to double the speed to 200 mm/min for clean through cuts with the newer shroud

    https://www.v1engineering.com/forum/topic/laser-cutting-carboard/

    — David

     

    • This reply was modified 2 months ago by  dkj4linux.
    2 users thanked author for this post.
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