<![CDATA[SoliForum - 3D Printing Community — Sqeaking again]]> https://www.soliforum.com/topic/4526/sqeaking-again/ Thu, 14 Nov 2013 15:06:23 +0000 PunBB <![CDATA[Re: Sqeaking again]]> https://www.soliforum.com/post/41631/#p41631 gwfami wrote:

If you could ask I would appreciate it.

Supplier wrote:

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

]]> Thu, 14 Nov 2013 15:06:23 +0000 https://www.soliforum.com/post/41631/#p41631 <![CDATA[Re: Sqeaking again]]> https://www.soliforum.com/post/41570/#p41570 If you could ask I would appreciate it.

]]> Wed, 13 Nov 2013 15:57:34 +0000 https://www.soliforum.com/post/41570/#p41570 <![CDATA[Re: Sqeaking again]]> https://www.soliforum.com/post/41569/#p41569 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.

]]> Wed, 13 Nov 2013 15:37:19 +0000 https://www.soliforum.com/post/41569/#p41569 <![CDATA[Re: Sqeaking again]]> https://www.soliforum.com/post/41567/#p41567 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

]]> Wed, 13 Nov 2013 15:16:43 +0000 https://www.soliforum.com/post/41567/#p41567 <![CDATA[Re: Sqeaking again]]> https://www.soliforum.com/post/41566/#p41566 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

]]> Wed, 13 Nov 2013 14:50:47 +0000 https://www.soliforum.com/post/41566/#p41566 <![CDATA[Re: Sqeaking again]]> https://www.soliforum.com/post/41565/#p41565 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...

]]> Wed, 13 Nov 2013 14:46:47 +0000 https://www.soliforum.com/post/41565/#p41565 <![CDATA[Re: Sqeaking again]]> https://www.soliforum.com/post/41564/#p41564 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.

]]> Wed, 13 Nov 2013 14:45:15 +0000 https://www.soliforum.com/post/41564/#p41564 <![CDATA[Re: Sqeaking again]]> https://www.soliforum.com/post/41521/#p41521 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.

]]> Wed, 13 Nov 2013 01:46:37 +0000 https://www.soliforum.com/post/41521/#p41521 <![CDATA[Re: Sqeaking again]]> https://www.soliforum.com/post/41502/#p41502 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...

]]> Tue, 12 Nov 2013 20:13:51 +0000 https://www.soliforum.com/post/41502/#p41502 <![CDATA[Re: Sqeaking again]]> https://www.soliforum.com/post/41500/#p41500 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.

]]> Tue, 12 Nov 2013 20:07:20 +0000 https://www.soliforum.com/post/41500/#p41500 <![CDATA[Re: Sqeaking again]]> https://www.soliforum.com/post/41457/#p41457 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.

]]> Tue, 12 Nov 2013 13:42:14 +0000 https://www.soliforum.com/post/41457/#p41457 <![CDATA[Re: Sqeaking again]]> https://www.soliforum.com/post/41456/#p41456 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.

]]> Tue, 12 Nov 2013 13:08:49 +0000 https://www.soliforum.com/post/41456/#p41456 <![CDATA[Re: Sqeaking again]]> https://www.soliforum.com/post/41408/#p41408 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.

]]> Tue, 12 Nov 2013 02:49:21 +0000 https://www.soliforum.com/post/41408/#p41408 <![CDATA[Sqeaking again]]> https://www.soliforum.com/post/41407/#p41407 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.

]]> Tue, 12 Nov 2013 02:47:09 +0000 https://www.soliforum.com/post/41407/#p41407