Muy buena información.... excelente página...

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Filament2print mar 21, 2019
Muchas gracias ;), intentamos dar la mayor y mejor información en cada artículo!!!
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Muy buena info, falta un nozzle el de titanio.

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Filament2print abr 3, 2019
Efectivamente Antoni ,existen nozzles de titanio y también de tungsteno, pero son para aplicaciones muy específicas.
Muchas gracias por tu apoyo y por comentar.
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Nozzles are used by most of the welding industries. Nozzles are classified into a different category based on their size and shape. Nozzles are basically a material that is made from a variety of metals i.e. Brass, Stainless Steel, Hardened Steel, Specialty materials like tungsten and ruby, etc.

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Buena información...cada vez aprendiendo más sobre este fascinante tema....muchas gracias, valioso el aporte.

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Excelente página y foro! Estoy haciendo pruebas con nozzle de diferente diámetro. Me gustaría dieran un poco más recomendaciones en diferentes tamaño de nozzle, como:
- Velocidad Recomendada
- Flujo
- Temperaturas
Muchas gracias !

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Filament2Print nov 20, 2019
Hola David,
Este artículo puede ayudarte a resolver algunas dudas sobre esos temas que comentas: "Dudas habituales sobre temperatura y velocidad de impresión de PLA y ABS".
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Muy bueno el artículo solo tengo una pregunta, cambie la boquilla de mi impresora a acero inoxidable (.6) en una ender 3, y tengo una altura de capa de .3, las primeras 3 o 4 capas me las hace perfectas pero despues no se pegan, y se hace una bola de filamento después, quiero saber a que se debe... Y si debo cambiarla a una punta de laton de nuevo, imprimo a 45mm/s y la temperatura me lo hizo con 225,215,200 °C

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Filament2print mar 9, 2020
Hola Nate,

No entendemos exactamente la problemática. De todos modos revisa que la configuración que tienes de impresión sea igual para las primeras capas que para el resto de impresión, ya que normalmente en el slicing se suelen emplear distinas configuraciones para las primeras capas.


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Excelente artículo, aunque tengo una duda.
Tengo entendido que incluso algunas boquillas de latón poseen plomo
Poseo una ENDER 3 Pro ¿Las boquillas son de latón (doradas), tienen este inconveniente de tener plomo?

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Filament2print abr 12, 2020
No podemos asesorarle en esta duda ya que no conocemos las boquillas que tienen las impresoras que menciona. Un saludo
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Lead.
Take a sample of soil from anywhere in North America and there will be detectable levels of lead present.
The State of California passed laws basically making garden dirt a toxic carcinogen.
The simple presence of lead in some piece of metal means next to nothing, unless that metal item is eroding into the pieces being made.
Suppose a brass nozzle (most alloys of brass have some detectable lead, where most alloys of steel do not!) with 0.001gram of lead is being used...how much brass would have to be worn away to end up as a dangerous concentration in a single printed part?
A lot!
The damage to the nozzle would be significant after one print...
Stainless steel, with the various alloys, is a different medical problem!
Iron, nickle, chromium and manganese are used to make stainless; medical implants cannot use nickle in ANY concentration!
Is there a nickle-free stainless nozzle out there?
Ask folks who have worked repairing medical equipment; the list of incompatible materials is long, and includes 'free machining brass'...up to 3% lead by weight!
I like the dept of the article, but Cali-fornication of facts distorted a few things.
Me?
Associates degree, biomedical equipment repair.
4+ years at major Hospital fixing everything between the wall-plates and the patient.

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Filament2Print mar 12, 2021
Hello Greg,

Thank you very much for your comment, at filament2print we love that you delve into the issues we are dealing with and that you contribute discussion that will make us all learn.

I would like to provide a little more information and another point of view on why steel and not brass nozzles should be used in medical printing.
The main problem does not stem from the metal alloys (at least not directly), but from wear and tear and derived by-products.

First of all, it should be pointed out that the toxicity mechanisms of lead and nickel are very different. The problem with lead is the bioaccumulation that produces serious poisoning that must be treated with chelating agents, while the main problem with nickel in implants is its ionic release that produces a phenomenon known as metallosis (it is not exclusive to nickel, it can also be caused by chromium, cobalt, molybdenum and even titanium ions) and that causes the revision of the prosthesis or implant.

In the case of lead, as you comment, the amount released is so low that it is highly unlikely that it can cause severe toxicity. And you are also correct that practically all steels contain considerable percentages of nickel, even surgical steels. I am not aware of the current state of US legislation, but in Europe as far as I know, the use of nickel-alloyed steels is authorized in implants (not in the case of components subjected to continuous wear such as acetabular components of hip replacement).

But, if lead from nozzles is not a problem and nickel can be, why is it more advisable to use steel?

The reason has to do with how the body reacts to the products derived from the wear of the nozzle.

I will try to explain it with an example:

Suppose we want to make an implant in 3D printing using a biocompatible and biodegradable plastic. We print one implant with a brass nozzle and another with a stainless steel one. We assume that both will contain micro and nano particles derived from the wear of the nozzle, however in the case of brass the quantity will be several orders of magnitude higher.

We implant both and they begin to biointegrate and biodegrade. During this process the metallic particles begin to be released (in higher concentration in the case of brass). Once exposed, brass particles quickly oxidize releasing ions, while stainless steel particles remain inert. And this is where the problem comes, the appearance of concentrations of metal ions in the environment of the implant (brass nozzle) can trigger an immune reaction that causes the rejection of the implant, while the stainless steel microparticles will have a bio-inert behavior (the probability that they erode or degrade to the point of releasing nickel ions is very low, and even in this case the amount of ions released would be negligible), so they will generally be eliminated by macrophages or precipitate and the organism will form a fibrotic capsule around it, so the chances of implant rejection will be very low.
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La rosca de los Nozzles son todas iguales o segun la marca de la impresora/hotend cambian?
Muchas Gracias

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Filament2print ago 17, 2021
Hola, Lucas. La rosca de los nozzles varía tanto en el paso como en la longitud de rosca. Existen distintos tipos como el nozzle V6, el nozzle MK8 o el nozzle MK10 entre otros. Cada impresora 3D será compatible con un tipo de nozzles. Un saludo!
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