3D prints
Join prints into parts bigger than your bed, or save a snapped one. Same spool, same colour, one solid piece.
Weld plastic
like you MIG‑weld steel.
WELDMER is a handheld plastic welder that brings professional-grade welding to the repair bench. It runs on standard 3D-printer filament.
- One hand on the torch
- Real filler material
- A seam that is fused, not glued
Coming to Kickstarter. The list gets the launch date, early-bird pricing and test results first. Unsubscribe with one click. Privacy.
Built for the repairs glue can't hold
Best where the filler can match the part. Pick the spool, weld the same plastic back into one piece.
Cars and motorcycles
Bumpers, fairings, trim and headlight tabs. Weld the crack instead of buying the part.
Home and workshop
Storage boxes, tool cases, appliance housings, garden furniture and bins.
Gear and hobbies
Drones, RC models, camping kit, bike parts and sports equipment. The things you'd rather fix than replace.
Fused, not stuck on.
A plastic repair holds only when filler and base material become one piece. Most handheld tools can't manage that, so the patch sits on top and lets go under load. WELDMER is built around the weld itself: a permanent bond you cannot break.
The same spools your 3D printer uses.
- PLA
- PETG
- ABS
- PP
- PA
- PC
Real filler, real seam
Material is added into the joint, not smeared across it. Break a good weld and it breaks beside the seam, not along it.
Runs on the filament you already own
Standard 1.75 mm spools — PLA, PETG, ABS and the rest of the shelf. Match the part exactly.
One hand on the torch
Trigger-fed, like a MIG gun. Your other hand holds the part, the clamp, or the next piece.
Why the tools you can buy today fall short
Hot-air gun and welding rod
Works well in trained hands. Needs both of them: one for the gun, one pushing rod into the joint at the right angle and pressure.
Soldering-iron and staple kits
Fine for stitching a crack shut. You are mostly smearing the plastic that is already there, not adding controlled filler.
3D-printing pens
They feed filament, but onto cold plastic. The result sticks to the surface rather than fusing with it.
Hand extrusion welders
The industrial answer. They also weigh several kilos and cost thousands, which rules them out for a repair bench.
WELDMER
Fed filler and a fused seam in a one-handed tool that runs on filament. Professional-grade welding at a fraction of the cost of an extrusion welder.
Where the project is
WELDMER is not for sale yet. This is the honest state of things, updated as it changes.
- Done
Control electronics and firmware
Heating, filament feed and temperature control run on the bench.
- Now
First complete prototype
Assembling the full tool into one handheld body.
- Next
Weld tests
Welding and breaking test pieces in common plastics. Subscribers see the results, including the failures.
- Then
Kickstarter launch
Date and early-bird price go to the email list first.
Questions
Which plastics will it weld?
The process suits thermoplastics — the family most repairs involve, such as PP, PE, ABS, PETG and PLA. We will only list a material once we have welded and broken test pieces in it. Tell us what you need to weld in the form below; it decides what gets tested first.
When can I buy one, and what will it cost?
There is no date yet. Pricing is being set now and depends on what the prototype tests show. The email list hears both before anyone else, and gets the early-bird offer.
How is this different from a 3D-printing pen?
A 3D pen melts filament and lays it onto cold plastic, so it sticks rather than fuses. WELDMER is built so that filler and base material become one piece — a weld, not a coating.
What will you email me?
Build progress, test results, the launch date and the early-bird offer. No daily newsletter, and your address is never shared or sold. Every email has a one-click unsubscribe link.
Who is making it?
BlackBite SIA, a hardware technology startup in Engure, Latvia. Behind it is a team with ten years of experience designing, machining and shipping physical products.
Help build it better.
Join the list and we'll email you a short survey. Your answers set the final spec, the launch pricing, and who gets first units. The survey only goes out by email.