Need some cutouts done in HPD plastic 1/16 thick

[turboless]

I have about 4 shapes I need cutout in black smooth serfice HPD plastic in black 1/16 thick shipped to MT or ID

attached is one the cutouts all are about the same size I need 30 of each.

please E-mail me at snoroost@yahoo.com for more info

[Matt@RFR]

Originally Posted by turboless HPD plastic

Do you mean HDPE? What alternates, if any, are acceptable?

[turboless]

Well I would like color to be in black and have a smooth texture not a rough texture.

Also needs to withstand and flex even in -20F temps.

I am fixing with glue a PVC coated Textile mesh to these frames to make venting. Also when you pop-Rivet them on I can't have the material spiting or cracking.

Cost is an issue I have tried doing Aluminum vents they work great but once you flex them or hit anything small they bend and do not reform the shape needed.

[universalfab]

Quote Sent, let me know, thank you for the oppurtunity.
Jim at Universal Precision Machine

[Matt@RFR]

So, basically, you don't know what material you need these made out of. Instead of doing due diligence and prototyping your products out of several materials and testing them all until you come up with a winner, you're going to lay the responsibility on the machine shop. What happens if the parts fail? Will you blame the machine shop, even though they are not material engineers? You haven't even indicated that you would like material certs supplied, so you wouldn't even have a way of proving what the material was in the first place. Be carefull here... A lot of guys are using scraps of whatever they have laying around so they can quote your parts lower.

The way you're doing it now is having a production run (sic) of prototypes made. Kinda backwards, don't you think?

[turboless]

I have been in Biz for a long time. I am not a pro and don't have a machine shop infact no shops in my area do any plastic of any sort just AL. Sorry you do not aprove of me asking questions on this forum. I have already built this frame more than once just not in a plastic forum it is also not a part that will see any stress other than a bump every once and a wile.

I am not going to blame anyone I trust that I will get fair feedback and I am willing and open to options and any advise I can get on material and work that is needed and things to look out for. I have already spent a fair share of money on CNC work this year and nock on wood I have never been screwed so I hope most will be fair but thanks for the warning.

I have got one quote and I am thankful for that hopefully a few more will come. I also have DXF files for those that need them to do a qoute.

Originally Posted by Matt@RFR So, basically, you don't know what material you need these made out of. Instead of doing due diligence and prototyping your products out of several materials and testing them all until you come up with a winner, you're going to lay the responsibility on the machine shop. What happens if the parts fail? Will you blame the machine shop, even though they are not material engineers? You haven't even indicated that you would like material certs supplied, so you wouldn't even have a way of proving what the material was in the first place. Be carefull here... A lot of guys are using scraps of whatever they have laying around so they can quote your parts lower. The way you're doing it now is having a production run (sic) of prototypes made. Kinda backwards, don't you think?

[Matt@RFR]

Originally Posted by turboless Sorry you do not aprove of me asking questions on this forum.

On the contrary. I wish you would ask more questions before half assing an RFQ. We have a Material Technology section as well as a Mechanical Engineering section, either of which surely have people that would be able to help you pick a material that will fit all your needs, be machinable and hopefully inexpensive. Laser cutting might be the way to go with these anyway. This would save you from guessing on the material and possibly having 120 large paperweights.

I am not going to blame anyone

I'd love to trust everybody that I've heard say that, but you and I both know that, as a business owner, we just have to cover our own asses. My suggestion (other than properly prototyping the parts): You call out a specific material, and I'll provide material certs. That leaves no questions to be asked.

[turboless]

Thanks for your help I have posted in that section now and hopefully will get some more help in there as well. New the forum and such and plastics in gen.

Hopefully this will still not stop those who can also help me with a price as well.

Thanks

[F&F]

E-mail sent.

Matt is correct about the material spec. A suitable material needs to be speced to give a proper quote. Quoting when the material is not known is irresponsible. Plastics can vary greatly price wise.

[universalfab]

Hey TurboLess,
We work with mainly metals and plastics, I sent you a quote with a plastic that withstands your demands of your part. I've already done all the work of getting a quote on it, please let me know, in my opinion it is a very fair price. If not let me know of what kind of price you had in mind, thank you and look forward to working withing you. P.S. Everyone, as I am a machinest and have been for years knowing tooling and material that best fits jobs is all in my trade, sometimes the costummer just doesn't know what they need. I agree it's a pain especially if you go to all the work of writing up a quote and searching and not getting the job, it stinks. Thats part of being a machinist/engineer. Oh and TurboLess the material I quoted you on is going to be the cheapest material, yet way strong in durability and taking those kinds of temperatures, just let me know, would appreciate it.

Jim at Universal Precision Machine

[Matt@RFR]

Originally Posted by turboless Hopefully this will still not stop those who can also help me with a price as well.

How can we give you a quote without knowing what material is needed? Material prices can be drastically different, plus some plastics don't machine well and will have longer run times. Some are more difficult to QC due to thermal expansion and moisture absorbtion. Some will benifit from specialized tooling. Some can be held down with double sided tape, some can not. Get my point?

[turboless]

No need to worry about it Matt.

Thanks for those who gave me an RFQ I had about 5 that were all right in the ballpark so everyone was on the same page as far as material goes. Also I talked in person to a few guys and everyone was very helpful and also very professional with helping me out so a Big thanks to everyone that I sent files to.

With that said I am going with David Wolfe Design, Inc. But I am sure I will be back here again this time with a better idea as far as matterial goes to not ruffle and feathers.

Thanks