CategoryMerlin Hotend

Silicone cover for Merlin Hotend

Thomas Kramm from Hackerspace FFM created some nice Silicone sleaves for the Merlin hotend. Since he uses different heating elements than I, he uses shorter ones that I currently don’t have, I created an own version of this cover.

It protects against blisters 😉 and will reduce the amount of heat lost during print. With the cover the already printed parts will not be exposed to the heat as much as without and you can be a lot less discriminate with material cooling.

You can find the STL for the mold attached

I used silicone meant for tin molds, it holds up till 450°C and i think it will last quite a while at the <300°C it is used in this case.

I used Troll Factory Type 3 silicone

 

 

MerlinCover01 MerlinCover02 MerlinCover03 MerlinCover04 Heatblock Cover

Material Test: FPE Shore 40D Naturel

mat_FPE01First test print with FPE Naturel – Shore 40D
The brown border at the bottom is residue from printing Lay wood before. It turned out that this residue made the FPE stick nicely to the plate, later tests with pure FPE did not work as nicely.

Filament Diameter: 1.71 mm
Nozzle Diameter (Set): 0.2 mm
Nozzle Diameter (Used): 0.2 mm
Nozzle Temperature: 215
Bed Temperature: 100
Bed Surface: Aluminium with Water/Woodglue (3:1)
Layerheight: 0.2 mm
Infill: 100%
Perimeter Speed: 5 mm/s
Infill speed: 7,5 mm/s
Retract: 3 mm

Material Test: Laywood Cherry brown

mat_LayWood01Filament Diameter: 1.75 mm
Nozzle Diameter (Set): 0.2 mm
Nozzle Diameter (Used): 0.2 mm
Nozzle Temperature: 200
Bed Temperature: 50
Bed Surface: Aluminium with Water/Woodglue (3:1)
Layerheight: 0.2 mm
Infill: 100%
Perimeter speed: 30 mm/s
Infill speed: 60 mm/s
Retract: 3 mm

Material Test: Taulman Nylon 618

mat_Nylon618 01Filament Diameter: 1.78 mm
Nozzle Diameter (Set): 0.2 mm
Nozzle Diameter (Used): 0.2 mm
Nozzle Temperature: 245
Bed Temperature: 100
Bed Surface: Thermoplast (Warp)
Layerheight: 0.2 mm
Infill: 100%
Perimeter speed: 20 mm/s
Infill speed: 60 mm/s
Retract: 3 mm

I have a really hard time getting the Nylon to stick to anything. So far it only stuck on a piece of thermoplast i had laying around, but the plate gets damaged when printing and the Nylon isn’t sticking very good and warping as you can see on the image.
Later i got better results using gluestick (PVA glue) on Glas, for bigger prints this remains a problem though. I found that Whale Tufnol sticks extremely good, unfortunately so good that you can’t remove the part without damaging it.

 

Material Test: HIPS

mat_HIPS01Filament Diameter: 1.71 mm
Nozzle Diameter (Set): 0.2 mm
Nozzle Diameter (Used): 0.2 mm
Nozzle Temperature: 230
Bed Temperature: 100
Bed Surface: Thermoplast (Warp)
Layerheight: 0.2 mm
Infill: 100%
Perimeter speed :20 mm/s
Infill speed: 60 mm/s
Retract: 3 mm

Similar to the Nylon i had a bit of a problem with HIPS sticking to the printing plate, but nowhere near as much.
The results are very encouraging, i like the material from it’s visual and haptic properties, it seems to be very stable.

Material Test: ABS

mat_ABS01Filament Diameter: 1.75 mm
Nozzle Diameter (Set): 0.2 mm
Nozzle Diameter (Used): 0.2 mm
Nozzle Temperature: 240
Bed Temperature: 100
Bed Surface: Dauerdruckplatte (afaik PEI)
Layerheight: 0.2 mm
Infill: 100%
Perimeter speed :20 mm/s
Infill speed: 60 mm/s
Retract: 3 mm

Material Test: Laybrick

mat_LayBrick01Filament Diameter: 1.75 mm
Nozzle Diameter (Set): 0.2 mm
Nozzle Diameter (Used): 0.2 mm
Nozzle Temperature: 180
Bed Temperature: 60
Bed Surface: Aluminium with Water/Woodglue (3:1)
Layerheight: 0.2 mm
Infill: 100%
Perimeter speed: 30 mm/s
Infill speed: 60 mm/s
Retract: 3 mm

Material Test: PET

mat_PET01Filament Diameter: 1.72 mm
Nozzle Diameter (Set): 0.2 mm
Nozzle Diameter (Used): 0.2 mm
Nozzle Temperature: 220
Bed Temperature: 25
Bed Surface: Dauerdruckplatte (afaik PEI)
Layerheight: 0.2 mm
Infill: 100%
Perimeter speed: 30 mm/s
Infill speed: 60 mm/s
Retract: 3 mm

Material Test: PLA

mat_PLA01

Filament Diameter: 1.70 mm
Nozzle Diameter (Set): 0.2 mm
Nozzle Diameter (Used): 0.2 mm
Nozzle Temperature: 200
Bed Temperature: 70
Bed Surface: Dauerdruckplatte (afaik PEI)
Layerheight: 0.2 mm
Infill: 100%
Perimeter speed: 30 mm/s
Infill speed: 60 mm/s
Retract: 3 mm

Merlin Prints by Hardwarekiller

Merlin Prints by Hardwarekiller (Michael Grosser)

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