surplusjohn
Diamond
- Joined
- Apr 11, 2002
- Location
- Syracuse, NY USA
I have a problem with a new rotationally molded HDPE part. if you have ever worked with rotational molding then you know that tolerances are problematic. anyways, we could not avoid designing a fitting that relies on a consistent ID, vendor thought they could do it, but they cant, so i have to come up with a simple way of machining the ID. This is a step fitting, tapered id for female fit to vacuum hose cuffs. Major ID is 2.45 " the minor is 2.3 range. we would be removing up to .060 of the diameter max.
question is, do such beasts exist? a long shot. or does anyone here make such things?
alternately, i have to figure out how to make a reamer for plastics. I am thinking of something that looks like a 3 blade spade bit, i can laser cut pre-hardened steel and grind a negative rake on the edge.
BTW, work holding is always a problem with these parts,
it seems that the molder should be able to route this, but they don't seem confident that it will work, so I am looking at alternate solutions just in case.
i am pretty good at designing around the short comings of rotational molding, but you cant always avoid going straight down the angry hole.
thanks
question is, do such beasts exist? a long shot. or does anyone here make such things?
alternately, i have to figure out how to make a reamer for plastics. I am thinking of something that looks like a 3 blade spade bit, i can laser cut pre-hardened steel and grind a negative rake on the edge.
BTW, work holding is always a problem with these parts,
it seems that the molder should be able to route this, but they don't seem confident that it will work, so I am looking at alternate solutions just in case.
i am pretty good at designing around the short comings of rotational molding, but you cant always avoid going straight down the angry hole.
thanks