H3C Sealed Purge Bin

A purge bin for the Bambu Lab H3C that really keeps the smell in. It comes in two parts: a hood module that stays on the printer and seals the purge chute against the back panel, and a bin that hangs on the hood. Emptying the bin never touches the seal on the printer. Three TPU seals, a snap-on lid and a small carbon filter do the rest.

Why it is different

• The hood stays put: it covers the whole 48 x 118 mm purge slot and a TPU flap seal runs in a closed loop around it, pressed against the rear panel. Because the hood never moves, that seal is never disturbed.

• The bin hangs on the hood. A TPU wiper seal on the hood's flat front face closes the joint between hood and bin, so the bin can come and go without touching the printer.

• Snap-on lid with a TPU lip seal, and a carbon filter cap on top of the hood for whatever is left.

• Same tool-free dock as the original H3C Purge Bin: already have it? Keep it.

• About 1.3 L, more than the original, and only 95 mm out from the panel.

• Made for the H3C, printable on any Bambu printer: no part is taller than 173 mm, so it even fits the A1 mini. The H3C profiles print the seals in TPU 75A 2.85 on the TPU PrintTool.

• Three textures, one family: DUNE (sand ripples), HIVE (hexagons) and NINE (flutes), with the NINE TOOLS badge engraved or as a 2-colour inlay.

• Support-free. The lid prints face-down so its texture comes out on the textured plate.

What's included

• 3MF per texture (DUNE, HIVE, NINE) for H3C (2 or 1 colours) and for all printers (2 colours AMS or 1 colour)

• STL zip per texture, plus the TPU seals (75A and 95A versions) and the dock as STLs

• The first one-piece version (H3C only) is still included: the files without "v2" in their name

How it seals

1. Panel flap seal (back of the hood): a soft TPU fin that bends against the printer's back panel all around the slot.

2. Bin wiper seal (front of the hood): a TPU fin loop around the hood's mouth that presses on the bin's flat back.

3. Lid lip seal: under the snap-on lid.

Air can only leave through the carbon filter.

The carbon filter: how to make and use it

1. Get activated-carbon filter foam (the black, sponge-like sheet sold as carbon filter pads or range hood / air purifier filter media).

2. Cut a piece about 37 x 9 x 7 mm. A little bigger is fine: the foam squeezes in and stays put.

3. Pull the filter cap up off the top of the hood.

4. Push the pad into the pocket under the cap. Small lips around the opening hold it, so it can't drop into the hood.

5. Snap the cap back on.

6. Swap the pad every 1-2 months, or sooner when you smell the purge again.

Don't use loose carbon granules: they fall through the vent holes. If you only have granules, sew or tape them into a thin breathable bag about 37 x 9 mm.

Install

1. Press the seals into their grooves: the panel flap seal on the back of the hood (fin pointing back), the bin wiper seal on the front of the hood (fin pointing forward), the lid seal under the lid. A few dots of CA glue help if one feels loose.

2. Already have the H3C Purge Bin? Keep its dock. If not, print the dock: slide its two hooks into the panel under the chute and push it down until it seats.

3. Hang the hood module on the dock: its tongue drops into the dock pocket. It stays there.

4. Hold the bin about 10 mm higher than its final position, push it against the hood and lower it until its two hooks drop into the hood's pockets.

5. Snap the lid on and put the carbon pad in the filter cap.

6. To empty: lift the bin about 10 mm, pull it away, empty it, hang it back. The hood stays on the printer.

Size

• Assembled: 142 x 95 x 272 mm (W x D x H)

• Hood module: 117 x 30 x 172 mm. Bin: 142 x 88 x 173 mm

• Capacity: about 1.3 L

• Protrusion from the panel: 95 mm including the lid tab (H3C needs 100 mm rear clearance)

Print settings

• Bin, hood, lid, cap and dock: PETG (Bambu PETG HF), 0.4 mm nozzle, 0.20 mm layers, 4 walls, 15% infill, Textured PEI plate, no supports. The bin and the hood print upright with brims.

• Seals on the H3C: Bambu TPU 75A (2.85 mm) on the TPU PrintTool.

• Seals on other printers: Bambu TPU 95A HF from the external spool (TPU does not go through the AMS). The 95A seals have thinner fins and a thinner lip, because 95A is stiffer.

• No TPU at all? A thin closed-cell foam strip pressed into the grooves works as a stopgap.

Print profiles (sliced in Bambu Studio)

• DUNE - 2 colours - H3C - PETG + TPU 2.85: 8.1 h, 322 g PETG + 5 g colour 2 (incl. purge) + 4.9 g TPU

• DUNE - 1 colour - H3C - PETG + TPU 2.85: 8.1 h, 300 g PETG + 4.9 g TPU

• DUNE - 2 colours AMS - all printers - PETG + TPU 95A: 10.7 h, 343 g PETG + 28 g colour 2 (incl. purge) + 4.3 g TPU

• DUNE - 1 colour - all printers - PETG + TPU 95A: 9.7 h, 297 g PETG + 4.3 g TPU

• HIVE - 2 colours - H3C - PETG + TPU 2.85: 8.9 h, 313 g PETG + 5 g colour 2 (incl. purge) + 4.9 g TPU

• HIVE - 1 colour - H3C - PETG + TPU 2.85: 8.8 h, 291 g PETG + 4.9 g TPU

• HIVE - 2 colours AMS - all printers - PETG + TPU 95A: 11.6 h, 334 g PETG + 28 g colour 2 (incl. purge) + 4.3 g TPU

• HIVE - 1 colour - all printers - PETG + TPU 95A: 10.6 h, 289 g PETG + 4.3 g TPU

• NINE - 2 colours - H3C - PETG + TPU 2.85: 10.0 h, 316 g PETG + 5 g colour 2 (incl. purge) + 4.9 g TPU

• NINE - 1 colour - H3C - PETG + TPU 2.85: 9.8 h, 294 g PETG + 4.9 g TPU

• NINE - 2 colours AMS - all printers - PETG + TPU 95A: 12.4 h, 337 g PETG + 28 g colour 2 (incl. purge) + 4.3 g TPU

• NINE - 1 colour - all printers - PETG + TPU 95A: 11.4 h, 291 g PETG + 4.3 g TPU

The original

Prefer an open bin? The original H3C Purge Bin uses the same dock and textures.

If it keeps your print room fresh, a Like or a Make with a photo really helps. Tell me which texture you printed!

Note: the photos in this gallery are photorealistic renders made from these exact print files. They will be replaced with photos of the real print soon. Original design. Not affiliated with Bambu Lab.