PRO430 high temperature: print in PEEK and PEKK

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PRO430 high temperature: print in PEEK and PEKK

In the PRO430range, discover the high-temperature PRO430, with a print head that can reach 500°C. A printer capable of producing technical and complex materials. Discover the characteristics of PEEK filaments and PEKK.

Why do we talk about temperature?

Two parts of the printer are heating up: 

  • The heating plate: to improve the adhesion of the parts
  • The print head: allows the extrusion of the filament

The temperature of the platen and printhead varies according to the materials used. Indeed, the higher the temperature, the more technical filaments you will have access to.he higher the temperature, the more technical filaments you will have access to.

What does this mean?

The PRO430 high temperature printer has a print head that can reach 500°C. This new print head gives you the possibility to print technical filaments and brings many advantages for industrialists and professionals. You have access to extruded filaments that have "exceptional" mechanical, thermal and chemical properties, such as Plexiglas. "such as PEEK and PEKK.

What are the families of filaments?

There are many varieties of plastics with different characteristics. We can mention three families mainly used in 3D printing. 

  • Standard thermoplastics such as PLA, ABS, ASA, PA CF, PA GF... 
  • Engineering plastics such as PC, PA 66, PA 11, PET...
  • High temperature materials such as PEEK and PEKK, and PEI 
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Which temperature for which filament?

Standard thermoplastics require standard FDM heating temperatures ranging from 180°C to 200°C. They are therefore all printable with the classic PRO430 range.

Engineering plastics require higher temperatures ranging from 150°C to 300°C, and are therefore also printable on the PRO430.

In contrast, high-temperature materials require high extrusion temperatures of between 300°C and 600°C. These materials also need to be printed on a hot plate:

    • At temperatures above 100°C for PEEK and PEKK. The PRO430's heating plate reaches temperatures of up to 120°C.
    • But the temperatures must be between 160°C and 190°C for the PEI. This is not currently possible with the PRO430.

Finally, it is also necessary to heat up the printing area: that is, the printer itself, in addition to the printing plate. 

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To do this, it is important to pre-heat the PRO430 platen for about 30 minutes to warm up the printer. In this way, the printing chamber can reach 60°C and the materials can be deposited and agglomerated correctly.

Characteristics of PEEK and PEKK

Both materials belong to the PAEK family: a group of high performance thermoplastics. They have very similar characteristics. Firstly, they both have high temperature resistance and can maintain their mechanical properties in a heated environment up to 250°C.

PEEK (Polyetheretherketone) has high chemical resistance and excellent mechanical properties: it has a good strength-to-weight ratio, which allows it to replace certain metals

PEKK (Polyetherketoneketone) is more resistant to hydrocarbons and chemical fluids, has good dielectric stability and does not emit toxic fumes. 

These technical filaments are used in the professional sectors of aerospace, aeronautics, medical and automotive.

Filaments reserved for 3D printing experts

PEEK and PEKK are complex and very technical filaments to print. They require special printing conditions (especially concerning temperature). 

In the case of PEKK, it is necessary to prepare the filament in a heating oven (which we can supply). On the following image, two parts printed in PEKK, with the same gcode and the same parameters: one with preparation of the filament beforehand, the other without.

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  • On the left-hand piece, the filament was properly prepared in a heating oven beforehand.
  • On the part on the right, the filament was not properly dehydrated, causing the filament to bubble and give a poor rendering. Secondly, during the printing process, the door of the closed enclosure was opened, which caused the ambient temperature to drop. Hence the whitish colour and the resulting poor rendering. The rest of the printing was done under the conditions of the piece on the left.

It is therefore essential to prepare the filament, and to have a closed enclosure to print certain materials.

 

For advice and guidance on these materials, please contact us at contact-pro@dagoma3d.com. Do you want to produce in technical materials? We can test your parts with the desired material.

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DAGOMA