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Type: Posts; User: mc_n_g

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  1. Replies
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    Re: Arburg C4/b pneumatic injection

    I also made rubber compression molds for antique auto parts. Vulcanizing type rubber about 30-70 Shore A durometer hardness
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    Re: Arburg C4/b pneumatic injection

    No I do not have a manual.
    Depends upon how it is set up horizontal or vertical. Can be switched by changing the bolt pattern and the square split nut blocks.
    We were running virgin polypropylene...
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    Re: Arburg C4/b pneumatic injection

    Yes. I have not worked on the 2 my father-in-law has since he passed.
    I still remember things about them as I work a lot with them.
    Some of the big things for you are do you have electrical tracing...
  4. Re: Help Troubleshooting Small Injection Mold for Small Card

    I think your fan is too far from the part and it cools too fast.
    Your melt should probably be hotter and maybe heat your mold for some better performance in a very difficult part.
    ABS is tough to...
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    Re: Arburg C4/b pneumatic injection

    If I remember right there are set screws to remove the whole cylinder from the machine. After removal from the machine you can loosen set screws from the top of the shield and take it off. I think...
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    Re: CNC Mill for small run injection molds

    I have a CNC Sherline and have used it for over 10 years to make many things to include small 4.5" x 4.5" plastic injection mold for small hundreds up to thousands of polyethylene and polypropylene...
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    Yes I am interested if you can post or send a...

    Yes I am interested if you can post or send a digital copy.
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    Others may disagree here but: I would check the...

    Others may disagree here but:
    I would check the end of that carbide ballmill with a 10x-30x lens and see what the flutes look like that are doing the cutting.
    I am guessing here that you may have...
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    Here are a few shots of one in use. The parts...

    Here are a few shots of one in use.
    The parts are not perfect but about 85-90% once the settings are right....
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    You are casting or injecting these? If you need...

    You are casting or injecting these?
    If you need the detail before casting try to use a small brush and add a layer of silicone (if that is what you are using) to the the critical areas then cast....
  11. Thread: Boss 5 upgrade

    by mc_n_g
    Replies
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    1,654

    Can you move the Z axis so the quill moves by...

    Can you move the Z axis so the quill moves by hand. Check to make sure it is not seized or something happened to the bearings by someone crashing into the table.

    Make sure the Z quill is able to...
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    The bump is the handle so you can swing the cover...

    The bump is the handle so you can swing the cover open. If you do not have a cover the plastic drops all over the floor.
    I was going to saw before Hugo posted the pics that I could see his air...
  13. Thread: Drilling Copper

    by mc_n_g
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    1,374

    Make a small flat with a sharpening stone on the...

    Make a small flat with a sharpening stone on the cutting lips. When the cutting lip is sharp in copper it grabs. By 'stoning' the cutting lip it makes the cutting lip a little more neutral to the...
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    Thanks for the response. No burning questions,...

    Thanks for the response.
    No burning questions, have 2 of them running but always looking for a little more information on them.
    They run fine but can be finicky at times.
    Would really like to fine...
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    Boss 5 program load problems

    Have a Bridgeport BOSS 5 system (original) that has recently stopped accepting programs through the RS232 connection.
    BEFORE
    The system worked fine and communicated with the PC without any...
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    Arburg C4/b pneumatic injection

    Anyone else running an Arburg C4/b pneumatic plastic injection machine?
    Anyone have a manual for it?

    http://i10.photobucket.com/albums/a140/mc_n_g/machinery/arburg_c4b_zps2d102a0a.jpg
  17. Thread: spindle runout?

    by mc_n_g
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    First you should have the HSS endmill running...

    First you should have the HSS endmill running with high RPM.
    Aluminum should normally be cut with 2 or 3 flutes for chip clearance. The side cut like in photo 2 is ok with 4 flutes to keep more...
  18. Thread: spindle runout?

    by mc_n_g
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    Endmill sticking out too far from holder. Too...

    Endmill sticking out too far from holder. Too deep of a cut. Play in the leadscrew. Crappy endmills. Wrong type of endmill. Wrong spindle RPM.
    The list goes on and on. A picture would help...
  19. Thread: retention knob

    by mc_n_g
    Replies
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    I would suggest you take measurements from one of...

    I would suggest you take measurements from one of the ones you have and compare it to one of several sites like
    - CT-40 Tool Shank
    or
    Rettention Knobs and Pull Studs for Machining Centers/Mills...
  20. Replies
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    The APGT should be a polished/ground insert for...

    The APGT should be a polished/ground insert for aluminum, should have very sharp edges. The APMT should be a pressed insert, normally coated and will have an edge which is not extremely sharp.
    The...
  21. Thread: Acme thread

    by mc_n_g
    Replies
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    Use a ruler and count the number of threads. You...

    Use a ruler and count the number of threads. You do not need a thread gage. Just count them
  22. Replies
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    Why will it be porous? I would worry more about...

    Why will it be porous? I would worry more about the part warping and have potential heat sinks. I would also worry about the part warping because of the compressed stress in the material when you...
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    I think your reaming speed is at the low end of...

    I think your reaming speed is at the low end of recommended drilling SFM. I think you are reaming too fast for HSS is low carbon. I would say 10-15 SFM for the HSS reamer rather than 40 SFM in that...
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    What state is the 9310 in? Is it getting...

    What state is the 9310 in? Is it getting hardened after your operations?
    Are you running the reamer at least 1/2 the speed of a HSS drillbit? The only other thing I can think of is you should only...
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    I would doubt the tap will last long enough to...

    I would doubt the tap will last long enough to wear enough...you will break it first.
    I second the forming tap suggestion but with one caveat, if you do not have a good set of drillbits that hold...
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    Remember drilling is essentially a roughing...

    Remember drilling is essentially a roughing operation. You need a good hole for ejection pins. Drilling alone is not a good option. The extra relief behind the pins are so it does not bind or drag...
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    Read and heed what hoss2006 said about drills and...

    Read and heed what hoss2006 said about drills and reamers. If the drill wanders the reamer wanders. Period. End of story.
    Buy some small carbide boring bars from MIcro100 to create a straight...
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    The tip radius has more to do with finish. The...

    The tip radius has more to do with finish. The insert shape has to deal more with the inherent strength of the tip and insert. If the step over rate is larger than your tip radius you will get...
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    I would recommend you get a set of toolholders...

    I would recommend you get a set of toolholders which take the same insert, if possible. This will save a little money. Some sets also have a boring bar or two as part of a set. At least on I am...
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    If you are stuck using CNMx inserts you should...

    If you are stuck using CNMx inserts you should try using a CNMP or CNMG.
    You shoudll get a polished or ground insert designed for aluminum. The CNMP is a positive cut to sit in negative toolholder....
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