Quick Take
If the job is welding plastic parts, you're deciding between the Weldy EX2 EX3 Plus and the more spec-rich LST600A. If the job is making 3D filament or small profiles, the choice comes down to two single-screw machines: the compact 3D Filament Single Screw Extruder and the TECHTONGDA single-screw extruder. The two machine types serve different workflows, so start by matching the tool to your output.
Listed Price Comparison
| Product | Listed Price | Price Bar |
| Plastic extrusion Welding machine Hot Air Plastic Welder Gun extruder LST600A | USD 1,782.95 | |
| 230V 3000W Weldy EX2 EX3 Plus Plastic Extrusion Extruder Machine + Welding Shoes | USD 144.52 | |
| 3D Filament Single Screw Extruder 110V/220V Plastic Extrusion Processing Machine | USD 227.99 | |
| Single Screw Extruder Plastic Extrusion Processing Machine 110V Speed Adjustable | USD 1,999.50 | |
Decision Matrix
| Product | Best For | Listed Spec Highlights | Watch Out For |
| LST600A | Hot-air welding HDPE, PP, and PVDF | 220V, 1100W extrusion power, 1600W hot air, 2kg/h welding speed | Requires 220V |
| Weldy EX2 EX3 Plus | Handheld 3-4mm plastic rod welding | 230V, 3000W, welding shoes included | Requires 230V |
| 3D Filament Single Screw Extruder | Small-batch filament and material tests | 2.5mm default nozzle, 200W heating coils, compact | Motor not included; 1.75mm nozzle separate |
| TECHTONGDA Single Screw Extruder | Continuous 3D printing material extrusion | 110V, 1-inch screw, 0.1-2kg/h output | Auxiliary equipment needed |
Product Notes
Plastic extrusion Welding machine Hot Air Plastic Welder Gun extruder LST600A
This handheld machine is built for hot-air plastic welding. The listing describes 1100W extrusion power, 1600W hot-air power, and a welding speed of 2kg/h for thermoplastics including HDPE, PP, and PVDF. It also lists a digital display controller, differently angled welding heads, and motor cold-start protection. That combination makes it a candidate for tight corners and narrow gaps. The main limitation is the input voltage: the listing explicitly says it does not support 110V, so you need a 220V supply. The listed angled head options are useful when your welds need to reach into tight spaces.
230V 3000W Weldy EX2 EX3 Plus Plastic Extrusion Extruder Machine + Welding Shoes
This Weldy-branded extruder offers a straightforward handheld welding setup. The main specs are 230V operation, 3000W power, and 3-4mm welding rod compatibility, with welding shoes included in the title. It is designed for rod-fed plastic welding in a compact form. The included welding shoes add convenience once you start a job. The more expensive LST600A lists a digital controller and additional head angles, while this model sticks to the core extrusion-welding function. If your work runs on 230V and you need a direct setup for 3-4mm rods, this unit covers the basics.
3D Filament Single Screw Extruder 110V/220V Plastic Extrusion Processing Machine
This single-screw extruder is aimed at experimental and small-batch work. It comes with a default 2.5mm nozzle, 200W ceramic heating coils, an aluminum alloy heat sink, and a 45-gauge steel screw described as high-temperature resistant. The compact design suits a bench setup. Two limitations are clearly spelled out: the motor part is not included, and a 1.75mm nozzle must be bought separately if you need that filament size. A 1-year warranty is listed in the specifications. This makes it a practical choice when you already have a motor and want a small processing head for testing special 3D materials.
Single Screw Extruder Plastic Extrusion Processing Machine 110V Speed Adjustable
This TECHTONGDA machine is the only one with speed adjustment. It runs on 110V and features a 1-inch screw with a 16:1 L/D ratio, a 250W motor, 400W heating power, and a maximum output capacity of 0.1-2kg/h. The description lists compatibility with PEEK, PCL, ABS, PLA, PETG, TPU, and TPE. The same description notes it needs auxiliary equipment such as cooling, a haul-off machine, winding, or cutting to produce finished products. If you want a larger, speed-adjustable screw setup for longer runs, this machine brings the 1-inch screw and adjustable speed to the table, but you must plan for auxiliaries.
Final Recommendations
- For a 230V handheld welder at the lower end of the price range: choose the Weldy EX2 EX3 Plus at USD 144.52.
- For a handheld welder with a longer list of controls and head options: choose the Plastic extrusion Welding machine Hot Air Plastic Welder Gun extruder LST600A at USD 1,782.95, and make sure 220V is available.
- For a compact bench extruder for small-batch filament tests: choose the 3D Filament Single Screw Extruder at USD 227.99, and plan for a separate motor plus the 1.75mm nozzle if needed.
- For a speed-adjustable single-screw machine for continuous 3D printing material runs: choose the Single Screw Extruder Plastic Extrusion Processing Machine at USD 1,999.50, and plan for auxiliary cooling and haul-off equipment.
