<![CDATA[SoliForum - 3D Printing Community — Sqeaking again]]> 2013-11-14T15:06:23Z PunBB https://www.soliforum.com/topic/4526/sqeaking-again/ <![CDATA[Re: Sqeaking again]]> gwfami wrote:

If you could ask I would appreciate it.

Supplier wrote:

There is greater than .025% lead in this product.

]]> https://www.soliforum.com/user/221/ 2013-11-14T15:06:23Z https://www.soliforum.com/post/41631/#p41631 <![CDATA[Re: Sqeaking again]]> If you could ask I would appreciate it.

]]> https://www.soliforum.com/user/1175/ 2013-11-13T15:57:34Z https://www.soliforum.com/post/41570/#p41570 <![CDATA[Re: Sqeaking again]]> The supplier doesn't say either way. I can ask.

Not that it would really matter, since none of the other components are food safety rated.

]]> https://www.soliforum.com/user/221/ 2013-11-13T15:37:19Z https://www.soliforum.com/post/41569/#p41569 <![CDATA[Re: Sqeaking again]]> Just spiffy.  Is the brass used here the lead-free brass from CA?

elmoret wrote:
gwfami wrote:

Brass is supposed to be made of zinc and copper, not lead.  Unless there is something I'm not aware of.

elmoret wrote:

I'm not sure that the brass in the nozzle is food safe (lead) and the carbon steel barrel/tool steel feedscrew are not food safety rated...


To enhance the machinability of brass, lead is often added in concentrations of around 2%.

http://en.wikipedia.org/wiki/Brass#Lead_content

]]> https://www.soliforum.com/user/1175/ 2013-11-13T15:16:43Z https://www.soliforum.com/post/41567/#p41567 <![CDATA[Re: Sqeaking again]]> gwfami wrote:

Brass is supposed to be made of zinc and copper, not lead.  Unless there is something I'm not aware of.

elmoret wrote:

I'm not sure that the brass in the nozzle is food safe (lead) and the carbon steel barrel/tool steel feedscrew are not food safety rated...


To enhance the machinability of brass, lead is often added in concentrations of around 2%.

http://en.wikipedia.org/wiki/Brass#Lead_content

]]> https://www.soliforum.com/user/221/ 2013-11-13T14:50:47Z https://www.soliforum.com/post/41566/#p41566 <![CDATA[Re: Sqeaking again]]> Brass is supposed to be made of zinc and copper, not lead.  Unless there is something I'm not aware of.

elmoret wrote:

I'm not sure that the brass in the nozzle is food safe (lead) and the carbon steel barrel/tool steel feedscrew are not food safety rated...

]]> https://www.soliforum.com/user/1175/ 2013-11-13T14:46:47Z https://www.soliforum.com/post/41565/#p41565 <![CDATA[Re: Sqeaking again]]> Strange as it may sound, the final product needs to be in food safe PP, but will not be in direct contact with food.  Going to be used for a housing for a new dishwasher invention I've got patent pending.

]]> https://www.soliforum.com/user/1175/ 2013-11-13T14:45:15Z https://www.soliforum.com/post/41564/#p41564 <![CDATA[Re: Sqeaking again]]> PLA is food safe, but the issue is that the way 3D printers (FDM) prints the material is not food safe.
Somewhere on the RepRAP forums there is a discussion on this topic complete with microscope pictures showing the un-cleanable pits in the plastic... I guess for one-time use 3D printed food equipment it would be OK, but that doesn't make much sense.

If you are doing this for yourself, then whatever - after all, what doesn't give you cancer these days? But if you're doing something for other people it's a no-go.

]]> https://www.soliforum.com/user/3570/ 2013-11-13T01:46:37Z https://www.soliforum.com/post/41521/#p41521 <![CDATA[Re: Sqeaking again]]> I'm not sure that the brass in the nozzle is food safe (lead) and the carbon steel barrel/tool steel feedscrew are not food safety rated...

]]> https://www.soliforum.com/user/221/ 2013-11-12T20:13:51Z https://www.soliforum.com/post/41502/#p41502 <![CDATA[Re: Sqeaking again]]> I plan on putting a complete primer on PP once I get it all figured out.  The PP pellets I have for testing are food safe, and I have some food safe colorant samples as well.  The color, tried red, came out nice and even, no grinding of the colorants was required.

]]> https://www.soliforum.com/user/1175/ 2013-11-12T20:07:20Z https://www.soliforum.com/post/41500/#p41500 <![CDATA[Re: Sqeaking again]]> Please keep us posted on your advances with PP.
I am checking with local suppliers in my town and it seems that PP is cheaper. I am waiting for my filastruder to arrive.
So.. I am now starting material research as so far I have only worked with PLA and ABS for 3d printing.
Thanks.

]]> https://www.soliforum.com/user/3986/ 2013-11-12T13:42:14Z https://www.soliforum.com/post/41457/#p41457 <![CDATA[Re: Sqeaking again]]> I have the white thrust plate and a melt filter nozzle.  I'm experimenting with the original non-filtered nozzle, as I may have to alter the hole size to get the filament diameter I want.  DIdn't want to mess up the melt filter nozzle.

]]> https://www.soliforum.com/user/1175/ 2013-11-12T13:08:49Z https://www.soliforum.com/post/41456/#p41456 <![CDATA[Re: Sqeaking again]]> Which thrust plate do you have? White laminate, or wood?

Squeaking is not really a problem. If you're seeing contaminants, best solution is a melt filter nozzle.

]]> https://www.soliforum.com/user/221/ 2013-11-12T02:49:21Z https://www.soliforum.com/post/41408/#p41408 <![CDATA[Sqeaking again]]> Switched my filastruder to vertical to test PP extrusion.  Ran it for about 5 hours, then noticed I was getting metal shavings in the extruded filament and tonight it started that infernal squeaking again.

Help, suggestions, comments are welcome.

]]> https://www.soliforum.com/user/1175/ 2013-11-12T02:47:09Z https://www.soliforum.com/post/41407/#p41407